CN115973373B

CN115973373B - Emergency rescue method and equipment for marine distress

Info

Publication number: CN115973373B
Application number: CN202310139842.4A
Authority: CN
Inventors: 孔洁; 刘真汉; 郭津玮; 陶嘉裕; 周磊
Original assignee: Zhejiang Zhongyu Communication Co ltd
Current assignee: Zhejiang Zhongyu Communication Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2024-06-21
Anticipated expiration: 2043-02-08
Also published as: CN115973373A

Abstract

The embodiment of the specification discloses an emergency rescue method for marine distress, which comprises the following steps: the personal positioning terminal starts the working state according to linkage triggering of a plurality of built-in sensor switches, obtains the water falling information of a user based on a built-in positioning module and acquisition equipment of the personal positioning terminal, determines an alarm instruction according to the positioning information and basic information of the personal positioning terminal, and sends the alarm instruction and image information to shipborne Beidou terminal equipment of a mother ship through a built-in wireless communication module of the personal positioning terminal so as to determine a rescue mode of the user based on response of the shipborne Beidou terminal equipment; if the self-rescue mode is determined, the shipborne Beidou terminal equipment of the mother ship receives the alarm instruction and the image information to analyze and alarm; if the emergency rescue mode is determined, transmitting an alarm instruction and image information to an emergency rescue management center through a built-in RD communication module and a Beidou communication system in the offshore distress emergency system so as to inform a ship in a preset range to rescue people falling into water.

Description

Emergency rescue method and equipment for marine distress

Technical Field

The specification relates to the technical field of communication, in particular to an emergency rescue method and equipment for marine distress.

Background

With the rapid development of marine fishing, marine transportation and maritime trade, the number of people working at sea is increasing. However, due to the complex and changeable marine environment, various emergency events are easy to occur on the sea, such as: a person falling into water accident caused by reef contact, collision and sinking, etc. When the marine operation personnel wear the conventional life jacket and fall into water, because the conventional life jacket lacks a positioning and reporting device, the rescue aircraft or the ship is difficult to find the position of the person in danger, and the person in danger often misses the gold rescue period of 72 hours, so that the life and property of the person are damaged. Therefore, how to quickly locate the offshore personnel and improve the search and rescue efficiency becomes an urgent problem.

The distress devices used in the prior art mainly fall into two categories: one is a distress device for positioning the sea based on short-distance radio communication through a global satellite navigation system (Global Navigation SATELLITE SYSTEM, GNSS for short), and the other is a distress device for positioning the sea based on satellite system communication through the GNSS. However, due to the wide ocean range, after a ship is in danger or a person falls into water, the communication distance of the distress mode based on short-distance radio communication is limited, and only a few to tens of seas around the ocean can be covered. When the distance between the ship and the on-shore base station with corresponding receiving equipment is far, the alarm information is not received, and rescue is missed. The marine rescue modes based on satellite system communication are all shipborne terminal equipment, personal equipment is lacked, and when people falling into water lose contact, the difficulty of search and rescue can be increased.

Therefore, there is a need for an emergency rescue method for maritime distress with wide coverage and high search and rescue efficiency.

Disclosure of Invention

One or more embodiments of the present disclosure provide an emergency rescue method and apparatus for offshore distress, which are used to solve the following technical problems: how to provide an emergency rescue method for maritime distress with wide coverage and high search and rescue efficiency.

One or more embodiments of the present disclosure adopt the following technical solutions:

One or more embodiments of the present disclosure provide an emergency rescue method for an offshore distress, which is applied to an offshore distress emergency system formed by a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center, and a Beidou communication system, and the method includes:

The personal positioning terminal starts the working state according to linkage triggering of a plurality of built-in sensor switches, and acquires the water falling information of a person falling into water based on a built-in positioning module and acquisition equipment; wherein, the water falling information includes: positioning information and image information;

The personal positioning terminal determines an alarm instruction according to the positioning information and basic information of the personal positioning terminal; wherein the basic information includes: device type, device number, user information;

The personal positioning terminal sends the alarm instruction and the image information to shipborne Beidou terminal equipment of a mother ship through a wireless communication module arranged in the personal positioning terminal so as to determine a rescue mode of people falling into water based on response of the shipborne Beidou terminal equipment; the rescue mode is a self-rescue mode and a other rescue mode;

If the rescue mode is determined to be a self-rescue mode, the shipborne Beidou terminal equipment of the mother ship receives the alarm instruction and the image information, analyzes and alarms;

if the rescue mode is determined to be the other rescue mode, the personal positioning terminal transmits the alarm instruction and the image information to the emergency rescue management center through a built-in RD communication module and a Beidou communication system in the offshore distress emergency system;

The emergency rescue management center obtains shipborne Beidou terminal equipment in a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal equipment in the preset range through the Beidou communication system, so that ships where the shipborne Beidou terminal equipment is located in the preset range rescue people falling into water.

Further, in one or more embodiments of the present disclosure, the starting working state of the personal positioning terminal according to linkage triggering of a plurality of built-in sensor switches specifically includes:

The personal positioning terminal obtains a current conductivity value through a first sensor arranged in the personal positioning terminal, and if the first sensor determines that the current conductivity value is larger than a preset conductivity threshold value, the first sensor triggers a corresponding first sensor switch;

a second sensor is arranged in the personal positioning terminal to acquire a current water pressure value, and the second sensor triggers a corresponding second sensor switch if the current water pressure value is larger than a preset water pressure threshold value;

and if the personal positioning terminal determines that the corresponding first sensor switch and the corresponding second sensor switch are triggered, the personal positioning terminal starts the working state.

Further, in one or more embodiments of the present disclosure, the acquiring, based on the built-in positioning module and the collecting device, the water falling information of the person falling into the water specifically includes:

The personal positioning terminal acquires image information of people falling into water according to built-in acquisition equipment;

the personal positioning terminal determines whether the RN cold start positioning of the RN positioning module is successful according to a return statement of the built-in RN positioning module;

If yes, resolving the Beidou satellite positioning signals received by the Beidou positioning communication antenna in the personal positioning terminal based on a built-in RN positioning module of the personal positioning terminal so as to obtain positioning information of the personal positioning terminal;

if not, the personal positioning terminal obtains positioning information of the personal positioning terminal based on the built-in Beidou RD communication module and the Beidou communication system;

the personal positioning terminal takes the image information and the positioning information as the water falling information of the water falling person.

Further, in one or more embodiments of the present disclosure, the personal positioning terminal obtains positioning information of the personal positioning terminal based on a built-in beidou RD communication module and the beidou communication system, and specifically includes:

The personal positioning terminal sends a positioning request to a Beidou satellite in the Beidou communication system through a built-in Beidou RD communication module; wherein the positioning request is a double-star active positioning request;

the Beidou satellite sends the positioning request to a ground central station in the Beidou communication system;

the ground central station acquires ground elevation data and the position data of the Beidou satellite based on the positioning request;

And the ground central station performs three-ball interaction calculation according to the elevation data, the position of the ground central station and the position of the Beidou satellite to obtain the positioning information of the personal positioning terminal, and sends the positioning information to the personal positioning terminal based on the Beidou satellite.

Further, in one or more embodiments of the present disclosure, the personal positioning terminal sends the alarm instruction and the image information to a shipborne beidou terminal device of a mother ship through a preset wireless communication module, so as to determine a rescue mode of a person falling into water based on a response of the shipborne beidou terminal device, and specifically includes:

The personal positioning terminal sends the positioning information to shipborne Beidou terminal equipment of a mother ship through a preset wireless communication module;

The shipborne Beidou terminal equipment of the mother ship receives the positioning information and acquires the position coordinates of the personal positioning terminal based on the positioning information so as to determine whether the position coordinates are positioned in a preset self-rescue range;

If yes, the shipborne Beidou terminal equipment of the mother ship responds to the personal positioning terminal to determine that the rescue mode of the person falling into water is a self-rescue mode;

if not, the shipborne Beidou terminal equipment of the mother ship does not respond to the personal positioning terminal, and the rescue mode of the person falling into water is determined to be a rescue mode.

Further, in one or more embodiments of the present disclosure, the on-board beidou terminal device of the mother ship receives the alarm instruction and the image information, and performs analysis alarm based on the alarm instruction and the image information, and specifically includes:

The Beidou positioning communication unit of the shipborne Beidou terminal equipment transmits the alarm instruction and the image information to the display control unit of the mother ship; the Beidou positioning communication unit is connected with the display control unit of the mother ship through a cable, and the display control unit is positioned in the cockpit of the mother ship;

the display control unit obtains the instruction type of the alarm instruction based on the alarm instruction;

If the display control unit determines that the alarm instruction is a water falling instruction based on the instruction type of the alarm instruction, starting an audible and visual alarm of the shipborne Beidou terminal equipment, displaying the image information and the positioning information by the display control unit, and acquiring physical sign information of a person falling into water based on the image information so that the shipborne Beidou terminal equipment can perform alarm rescue based on the physical sign information, the basic information and the positioning information;

and if the display control unit determines that the alarm instruction is a release instruction based on the instruction category of the alarm instruction, ending the sound-light alarm of the shipborne Beidou terminal equipment.

Further, in one or more embodiments of the present disclosure, the personal water falling positioning transmits the alarm instruction and the image information to the emergency rescue management center through the built-in RD communication module and the beidou communication system, and specifically includes:

the personal positioning terminal transmits the alarm instruction to a Beidou satellite in the Beidou communication system based on a preset alarm communication protocol based on a built-in RD communication module, and transmits the image information to the Beidou satellite in the Beidou communication system through a preset image transmission strategy;

a satellite receiving antenna in the Beidou communication system receives the alarm instruction and the image information forwarded by the Beidou satellite, so that a service platform in the Beidou communication system acquires the alarm instruction and the image information;

the service platform transmits the alarm instruction and the image information to the emergency rescue management center based on a preset network private line.

Optionally, in one or more embodiments of the present disclosure, the transmitting the alarm instruction to a beidou satellite in the beidou communication system based on a preset alarm communication protocol specifically includes:

The personal positioning terminal acquires constraint conditions of various Beidou satellites in the Beidou communication system; wherein the constraint condition includes: a transmission power, a transmission information rate, a transmission information length;

The personal positioning terminal automatically segments the image information based on the constraint condition to obtain a plurality of image information packets to be transmitted;

And the built-in RD communication module in the personal positioning terminal transmits the information packets to be transmitted according to a preset packet loss retransmission mechanism so as to transmit the image information to the emergency rescue management center based on the Beidou communication system.

Optionally, in one or more embodiments of the present disclosure, the transmitting the image information to a beidou satellite in a beidou communication system through a preset image transmission policy specifically includes:

The personal positioning terminal and the emergency rescue management center agree on the components of the preset communication transmission protocol, and position information of each component is determined; wherein the composition comprises any one or more of the following components: instruction type, data length, user address, information content and check code;

The personal positioning terminal determines the instruction format corresponding to each instruction component according to the preset byte range and the preset format information of each instruction component;

the personal positioning terminal arranges the instruction formats of the constituent components based on the position information of the constituent components to obtain the instruction format of the preset communication transmission protocol, so as to transmit the alarm instruction to the emergency rescue management center based on the instruction format.

Further, in one or more embodiments of the present disclosure, before the emergency rescue management center obtains the on-board beidou terminal device within the preset range based on the position information in the alarm instruction, the method further includes:

The emergency rescue management center analyzes the alarm instruction based on a preset communication transmission protocol to obtain a mother ship Beidou terminal ID number in the alarm information;

the emergency rescue management center sends alarm confirmation information to the shipborne Beidou terminal of the mother ship based on the shipborne Beidou terminal ID number of the mother ship; the alarm confirmation information is used for confirming whether the person falling into water corresponding to the personal positioning terminal falls into water or not to the shipborne Beidou terminal of the mother ship;

if the emergency rescue management center receives the return information of the shipborne Beidou terminal of the mother ship responding to the event confirmation information, whether the alarm instruction is misreported or not is determined based on the return information.

Further, in one or more embodiments of the present disclosure, after the personal positioning terminal is triggered according to linkage of the built-in plurality of sensor switches and the working state is opened, the method further includes:

Acquiring current illumination intensity through a photosensitive sensor preset on the personal positioning terminal, and controlling a strobe lamp preset on the personal positioning terminal to be started if the personal positioning terminal determines that the current illumination intensity is lower than a preset illumination threshold value;

the personal positioning terminal obtains the starting time of the stroboscopic lamp and determines the state adjustment time of the stroboscopic lamp based on a preset time period and the starting time;

And the personal positioning terminal adjusts the flickering frequency of the stroboscopic lamp based on the state adjustment time.

One or more embodiments of the present disclosure provide an emergency rescue device for offshore distress, which is applied to an emergency system for offshore distress formed by a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center, and a Beidou communication system, and the device includes:

At least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The memory stores instructions executable by the at least one processor to enable the at least one processor to:

The above-mentioned at least one technical scheme that this description embodiment adopted can reach following beneficial effect:

The positioning information and the image information acquired by the built-in positioning module and the acquisition equipment are acquired through the starting of the personal positioning terminal, so that the positioning information and the image information are transmitted to the shipborne Beidou terminal equipment based on the communication module to alarm, and the problem that the person falling into water cannot be positioned quickly when losing contact in the traditional mode is avoided only based on the shipborne terminal equipment for rescue. The rescue mode is used for rescuing the people in danger on the sea, so that the problem that the mother ship cannot organize the people falling into water for self-rescue due to various reasons is solved, and the survival rate of the people falling into water is improved.

Drawings

In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some of the embodiments described in the present description, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:

FIG. 1 is a schematic flow chart of an emergency rescue method for marine distress according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an offshore distress emergency system according to an embodiment of the present disclosure;

Fig. 3 is a schematic view of a scenario of a self-rescue range of a mother ship in an application scenario provided in an embodiment of the present disclosure;

fig. 4 is a schematic flow chart of a self-rescue mode in marine distress in an application scenario provided in the embodiment of the present disclosure;

fig. 5 is a schematic diagram of a rescue mode in a certain application scenario provided in the embodiments of the present disclosure;

Fig. 6 is a schematic flow chart of an emergency rescue method based on a distress mode in sea under a certain application scenario provided in the embodiment of the present disclosure;

fig. 7 is a schematic diagram of an internal structure of an emergency rescue device for marine distress according to an embodiment of the present disclosure.

Detailed Description

The embodiment of the specification provides an emergency rescue method and equipment for marine distress.

With the rapid development of sea related industries such as fishery, maritime transportation industry and the like, the number scale of sea related people is gradually expanding. Because the climate of the ocean environment is very complex and changeable, people falling into water accidents and dangerous situations caused by reef contact, collision and sinking are more frequent each year. After people wear the conventional life jacket to fall into water, due to the fact that a positioning and reporting device is lacked on the conventional life jacket, the position of people in distress is difficult to find by a rescue airplane or a ship, and people falling into water often miss a 72-hour gold rescue period, so that the search and rescue efficiency and the search and rescue success rate of the people falling into water are very low.

The marine distress devices used in the prior art are mainly divided into two main types, namely, marine distress devices based on short-distance radio communication through GNSS positioning, such as VHF-DSC or VHF-EPIRB devices using CH70 channels, AIS-SART type AIS-MOB devices and the like; the other type is a satellite distress device based on satellite system communication, such as EPIRB equipment working at 406MHz/121.5MHz based on a global satellite search and rescue system, EPIRB equipment based on a maritime satellite system, satellite communication equipment based on a low-orbit iridium satellite communication system and BD-EPIRB or BD-MOB equipment based on a Beidou message satellite service system independently developed in China. Because the ocean range is wide, after a ship is in danger or a person falls into water, the communication distance of the short-distance wireless communication marine distress device such as VHF-DSC, VHF-EPIRB, AIS-MOB and the like is limited, and the communication distance can only cover a few sea to tens of sea at the periphery. When the distance between the ship and the on-shore base station with corresponding receiving equipment is far, the alarm information is not received, and rescue is missed. Moreover, EPIRB devices are on board, personal MOB devices are absent, and once the ship is submerged, people falling into water lose contact, so that search and rescue are difficult.

In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present disclosure.

As shown in fig. 1, in one or more embodiments of the present disclosure, a method flow diagram of an emergency rescue method for marine distress is provided. As can be seen from fig. 1, the emergency rescue method for the marine distress is applied to a marine distress emergency system composed of a personal positioning terminal, a shipborne Beidou terminal device, an emergency rescue management center and a Beidou communication system, and comprises the following steps:

S101: the personal positioning terminal starts the working state according to linkage triggering of a plurality of built-in sensor switches, and acquires the water falling information of a person falling into water based on a built-in positioning module and acquisition equipment; wherein, the water falling information includes: positioning information and image information.

In order to improve the reliability of the personal positioning terminal in alarming, the power consumption of the personal positioning terminal is reduced, the false alarm rate of the personal positioning terminal is reduced, the water falling information of the water falling person is timely obtained, and the life saving rate of the water falling person is improved. The personal positioning terminal in the embodiment of the specification starts the working state of the personal positioning terminal according to linkage triggering of a plurality of built-in sensors, and acquires the water falling information of the person falling into the water of the personal positioning terminal according to the built-in positioning module and the acquisition equipment after the working state is started. For example: positioning information calculated by a Beidou communication system is obtained based on the Beidou RD positioning module, or Beidou satellite signals are obtained according to the Beidou RN positioning module to obtain the positioning information. Image information of personnel falling into water of the personal positioning terminal is obtained based on the infrared camera, and the information of the personnel falling into water is determined based on the positioning information and the image information.

Specifically, in one or more embodiments of the present disclosure, the personal positioning terminal opens a working state according to linkage triggering of a plurality of built-in sensor switches, and specifically includes the following steps:

The personal positioning terminal obtains the current medium conductivity value detected by the first sensor through the built-in first sensor, and if the first sensor determines that the current conductivity value is greater than the preset conductivity threshold value in the embodiment of the specification due to the huge difference of the seawater conductivity value and the freshwater conductivity value, the first sensor triggers the corresponding first sensor switch, so that the first sensor switch is closed. According to the embodiment of the specification, based on the mode, the problem of false alarm caused by automatic alarm after the first sensor of the personal positioning terminal detects that the personal positioning terminal contacts with a water source when an offshore worker works in a rainy and foggy weather is avoided. Meanwhile, a second sensor is arranged in the personal positioning terminal to detect and acquire a current water pressure value, and if the current water pressure value detected by the second sensor is determined to be larger than a preset water pressure threshold value, the second sensor triggers a corresponding second sensor switch, so that the second sensor switch is closed. Wherein, it should be noted that the personal positioning terminal can be fixed on the life jacket or the life boat/raft, or can float on the sea surface in a disengaging way and be connected with the life jacket or the life boat/raft through a hauling rope. The preset water pressure threshold value is a corresponding alarm water pressure value obtained according to the water falling depth set by the personal positioning terminal. If the personal positioning terminal determines that the corresponding first sensor switch and the corresponding second sensor switch are triggered, the personal positioning terminal starts the working state. The problem that the personal positioning terminal is wrongly started to give an alarm is solved by linkage triggering of a plurality of sensors. In addition, the personal positioning terminal in the embodiment of the present disclosure may also be based on a manual on-state.

In order to quickly obtain positioning information, rescue alarm time is saved. In one or more embodiments of the present disclosure, a personal positioning terminal obtains water falling information of a person falling into water based on a positioning module and an acquisition module built in the personal positioning terminal, and specifically includes the following steps: firstly, the personal positioning terminal acquires image information of people falling into water according to built-in acquisition equipment, and meanwhile, after the personal positioning terminal enters a working state, the built-in RN positioning module does not store any information before the RN is subjected to cold start positioning, ephemeris needs to be downloaded, the first positioning time is about 40-60s, and therefore the personal positioning terminal cannot report the position information based on the first time of the RN positioning module falling into water. After people fall into water, rescue time is often required to be in a short time, so that before information such as an alarm instruction, image information and the like which need to be reported is transmitted by the personal positioning terminal, whether the RN cold start positioning of the RN positioning module is successful or not is determined according to a return statement of the built-in RN positioning module. If the RN cold start is successful according to the return statement, the personal positioning terminal calculates Beidou satellite positioning signals received by the Beidou positioning communication antenna in the personal positioning terminal according to the built-in RN positioning module of the personal positioning terminal, so that positioning information of the personal positioning terminal is obtained.

If the RN cold start is not successful according to the return statement, the personal positioning terminal obtains positioning information of the personal positioning terminal according to the built-in Beidou RD communication module and the Beidou communication system in order to save alarm time. Specifically, in one or more embodiments of the present disclosure, a personal positioning terminal obtains positioning information of the personal positioning terminal based on a built-in beidou RD communication module and the beidou communication system, and specifically includes the following steps:

firstly, a personal positioning terminal sends a positioning request to a Beidou satellite in a north bucket communication system through a built-in Beidou RD communication module; the positioning request is a double-star active positioning request, so that the position information of the personal positioning terminal can be obtained based on double-star active positioning. And then the Beidou satellite sends a positioning request to a ground central station in the Beidou communication system, the ground central station acquires ground elevation data and position data of the Beidou satellite according to the received positioning request, and performs three-ball interaction calculation according to the elevation data, the position of the ground central station and the position of the Beidou satellite to obtain positioning information of the personal positioning terminal, so that the positioning information is sent to the personal positioning terminal based on the Beidou satellite. According to the embodiment of the specification, before RN cold start positioning is successful, beidou RD double-star active positioning is adopted, active positioning requests are sent to Beidou satellites through the Beidou RD communication module, a ground central station can calculate and obtain the water falling position based on the three-ball interaction principle according to terminal positioning requests and elevation data forwarded by 2 Beidou satellites, and then the water falling position is sent to a personal water falling positioning alarm terminal through the Beidou satellites. When the positioning information is acquired based on the mode, the first capturing time of the RD communication module, the time delay of sending the positioning request information to the central station, the time length of calculating the position information by the central station and the time delay of sending the position information to the RD communication module by the central station are calculated, the whole RD active positioning time is not more than 3S, and compared with the RN cold start first positioning time of 40-60S, the positioning time of cold start is effectively reduced, the real-time performance of the whole system is improved, and the time required by alarming is saved.

Further, in order to guide the rescue aircraft or the ship to find people falling into water as soon as possible under the conditions of dark environment and known water falling position, in one or more embodiments of the present disclosure, the personal positioning terminal is triggered according to linkage of a plurality of built-in sensor switches, and after the personal positioning terminal is in a working state, the method further comprises the following steps:

the current illumination intensity is obtained through a photosensitive sensor preset on the personal positioning terminal, and if the personal positioning terminal determines that the current illumination intensity is lower than the preset illumination threshold value, a strobe lamp preset on the personal positioning terminal is controlled to be started. After a strobe lamp preset on the personal positioning terminal is controlled to be turned on, the personal positioning terminal obtains the turn-on time of the strobe lamp, and the state adjustment time of the strobe lamp is determined according to a preset time period and the turn-on time, so that the personal positioning terminal adjusts the flickering frequency of the strobe lamp based on the state adjustment time. The average working power consumption of the terminal can be greatly reduced, and the working endurance time of the terminal can be prolonged by two methods of controlling the strobe to turn on and reducing the flickering frequency of the strobe after accumulatively flickering according to the illumination intensity through the photosensitive sensor.

S102: the personal positioning terminal determines an alarm instruction according to the positioning information and basic information of the personal positioning terminal; wherein the basic information includes: device type, device number, user information.

Based on the above step S101, after the personal positioning terminal starts working, positioning information is obtained, in order to transmit relevant information of a person falling into water to the shipborne beidou terminal device of the corresponding mother ship, the personal positioning terminal obtains basic information of the personal terminal according to the positioning information, for example: the equipment type, the equipment number, the user information and the like determine an alarm instruction, so that after the alarm instruction is transmitted to the display and control unit of the shipborne Beidou terminal of the mother ship, the display and control unit of the shipborne Beidou terminal can analyze and display the information content of the instruction and start audible and visual alarm.

S103: the personal positioning terminal sends the alarm instruction and the image information to shipborne Beidou terminal equipment of a mother ship through a wireless communication module arranged in the personal positioning terminal so as to determine a rescue mode of people falling into water based on response of the shipborne Beidou terminal equipment; the rescue mode is a self-rescue mode and a other rescue mode.

Because the mother ship is in danger and is submerged or the person falling into water deviates from the self-rescue layer of the mother ship due to bad weather, other crews of the mother ship lose the rescue capability of the person falling into water, in order to ensure timely rescue of the person falling into water, the personal positioning terminal sends an alarm instruction and image information to the shipborne Beidou terminal equipment of the mother ship through the built-in wireless communication module of the personal positioning terminal in the embodiment of the specification shown in fig. 2, so that the rescue mode of the person falling into water is determined to be the self-rescue mode based on the mother ship or the other rescue mode based on other ships or rescue equipment according to the return response of the shipborne Beidou terminal equipment.

Specifically, in one or more embodiments of the present disclosure, the personal positioning terminal sends an alarm instruction and the image information to a shipborne beidou terminal device of a mother ship through a preset wireless communication module, so as to determine a rescue mode of a person falling into water based on a response of the shipborne beidou terminal device, and specifically includes the following steps:

Firstly, a personal positioning terminal sends positioning information to shipborne Beidou terminal equipment of a mother ship through a preset wireless communication module. The shipborne Beidou terminal equipment of the mother ship receives the positioning information, and obtains the position coordinates of the personal positioning terminal based on the positioning information so as to determine whether the position coordinates are located in a preset self-rescue range or not, so that the problem that the mother ship cannot rescue the person falling into water quickly based on a self-rescue mode in a scene that the person falling into water deviates from the mother ship due to bad weather is solved. As shown in fig. 3, if it is determined that the current person falling into water is within the self-rescue range of the mother ship according to the positioning information of the person falling into water, the shipborne Beidou terminal equipment of the mother ship responds to the personal positioning terminal to determine that the rescue mode of the person falling into water is a self-rescue mode. If the person falling into water is determined not to be in the preset self-rescue range of the mother ship according to the positioning information of the personal positioning terminal, the shipborne Beidou terminal equipment of the mother ship does not respond to the personal positioning terminal, and the rescue mode of the person falling into water is determined to be the rescue mode of the person falling into water.

S104: and if the rescue mode is determined to be a self-rescue mode, receiving the alarm instruction and the image information by the on-board Beidou terminal equipment of the mother ship, analyzing and alarming.

Based on the step S103, if the rescue mode is determined to be the self-rescue mode, the on-board Beidou terminal of the mother ship receives the alarm instruction and the image information of the personal positioning terminal so as to analyze and alarm the situation of the person falling into water based on the alarm instruction and the image information. The following description is needed: the image information may be used for personnel vital sign judgment such as: judging the condition that the person falling into water is in wakefulness, coma and death, the surrounding environment of the person falling into water can be obtained, for example: weather conditions, stormy waves and the like, so that rescue workers can adjust rescue strategies according to vital signs of people falling into water and surrounding environment conditions, an optimal rescue scheme is made, and the rescue rate of the people falling into water is improved.

The Beidou positioning communication unit transmits an alarm instruction and image information to the display control unit of the mother ship; the Beidou positioning communication unit is connected with a display control unit of the mother ship through a cable, and the display control unit is located in a cockpit of the mother ship, for example: under a certain application scene, the on-board Beidou terminal equipment, the Beidou positioning communication unit can be fixed on the mast of the ship and is connected with the display and control unit in the cockpit through a cable.

After the Beidou positioning communication unit of the shipborne Beidou terminal equipment transmits an alarm instruction and image information to the display control unit of the mother ship, the display control unit acquires the instruction type of the alarm instruction according to the alarm instruction. If the display control unit determines that the alarm instruction is a water falling instruction based on the instruction type of the alarm instruction, starting audible and visual alarm of the shipborne Beidou terminal equipment, displaying image information and positioning information by the display control unit, and acquiring physical sign information of a person falling into water based on the image information so that the shipborne Beidou terminal equipment can carry out alarm rescue based on the physical sign information, the basic information and the positioning information. Otherwise, if the display control unit determines that the alarm instruction is a release instruction according to the instruction type of the alarm instruction, the sound-light alarm of the shipborne Beidou terminal equipment is ended.

Fig. 4 is a schematic flow chart of a self-rescue mode in distress on the sea in an application scenario according to an embodiment of the present disclosure. As can be seen from fig. 4, in the self-rescue mode: after the personal positioning terminal automatically enters the water falling positioning alarm working state manually or based on the triggering of a plurality of sensors, the wireless communication module is utilized to perform the following steps according to the preset emission frequency, for example: and 30 seconds/time or 60 seconds/time, and based on a self-defined water falling alarm communication protocol, sending a water falling alarm instruction and an image to a shipborne Beidou terminal display and control unit of the mother ship. The position information contained in the water falling alarm instruction adopts RD active positioning before the RN cold start positioning is successful, and adopts RN positioning after the RN positioning is successful. The display control unit in the on-board big dipper equipment of the mother ship integrates the wireless communication unit, receives and falls into water alarm instruction and image and analyzes to with alarm information and image display on the display screen, carry out audible and visual warning through the megaphone with the external loudspeaker of display control unit, warning light simultaneously, remind the crewman of mother ship to organize personnel immediately and rescue. If the device is triggered by human error or equipment error, the device can be shut down manually, the personal water falling positioning alarm terminal sends a water falling alarm release instruction to the shipborne Beidou terminal display and control unit of the mother ship through a self-defined water falling alarm communication protocol, and the display and control unit releases the audible and visual alarm after receiving the instruction. Based on the mode, when personnel accidentally fall into water under the condition that the mother ship is intact, the mother ship crew can be mobilized to organize self-rescue for the personnel accidentally falling into water within 5 seconds, the survival rate of the personnel falling into water can be greatly improved, and the water falling alarm linkage of the personal positioning terminal and the shipborne Beidou terminal is realized.

S105: if the rescue mode is determined to be the other rescue mode, the personal positioning terminal transmits the alarm instruction and the image information to the emergency rescue management center through a built-in RD communication module and a Beidou communication system in the offshore distress emergency system.

If the rescue mode is determined to be the other rescue mode based on the step S103, in the embodiment of the present disclosure, in order to quickly notify other ships or other rescue devices to rescue, the personal positioning terminal transmits the alarm instruction and the image information of the personal positioning terminal to the emergency rescue management center through the built-in RD communication module and the beidou communication system in the emergency system for distress on the sea, thereby improving the real-time performance and reliability of rescue.

Specifically, in one or more embodiments of the present disclosure, a personal water falling location transmits an alarm instruction and image information to an emergency rescue management center through a built-in RD communication module and a beidou communication system, and specifically includes the following steps:

As shown in fig. 5, in one or more embodiments of the present disclosure, a schematic diagram of a rescue mode in a certain application scenario is provided. Firstly, a personal positioning terminal transmits an alarm instruction to a Beidou satellite in a Beidou communication system based on a preset alarm communication protocol based on a built-in RD communication module, and transmits image information to the Beidou satellite in the Beidou communication system through a preset image transmission strategy. And then a satellite receiving antenna in the Beidou communication system receives the alarm instruction and the image information forwarded by the Beidou satellite from the personal positioning terminal, so that a service platform in the Beidou communication system acquires the alarm instruction and the image information, and then the service platform transmits the alarm instruction and the image information to an emergency rescue management center according to a preset network private line. As shown in fig. 6, in one or more embodiments of the present disclosure, a flow chart of an emergency rescue method based on a distress mode in sea in a certain application scenario is provided. As can be seen from fig. 6, the device type, the alarm type, the status information, the device number, the device ID number, the crew information, the water fall alarm information of the mother ship on-board Beidou terminal ID number and the packetized image information are transmitted to the north bucket satellite by the RD communication module according to a preset transmission frequency, such as 60 s/time. The Beidou III civil service platform receives the alarm information and the image through a satellite receiving antenna of the ground central station, and transmits the alarm information and the image to an on-shore emergency rescue management center through a network private line, so that the emergency rescue management center analyzes and organizes rescue according to the alarm information and the image information. The effect of calling for help to the on-shore emergency rescue management center by Beidou RD communication under the scene that the mother ship is in danger and is submerged or people falling into water deviate from the mother ship far due to bad weather is achieved. The problem that the water falling positioning alarm device utilizing short-distance wireless communication such as AIS, VHF radio stations and the like in the existing mode cannot obtain timely rescue under the condition that a mother ship is submerged and no ship exists in a certain peripheral range is effectively solved.

Further, in order to ensure the reliability of data transmission, reliable transmission of alarm instructions is realized. In one or more embodiments of the present disclosure, an alarm command is transmitted to a beidou satellite in a beidou communication system based on a preset alarm communication protocol, and specifically includes the following steps:

Firstly, a personal positioning terminal and an emergency rescue management center define components of a preset communication transmission protocol, and position information of each component is determined; wherein, it should be noted that the composition includes any one or more of the following: instruction type, data length, user address, information content, check code. And the personal positioning terminal determines the instruction format corresponding to each instruction component according to the preset byte range and the preset format information of each instruction component. And the personal positioning terminal arranges the instruction formats of the constituent components based on the position information of the constituent components to obtain the instruction format of a preset communication transmission protocol, so as to transmit an alarm instruction to the emergency rescue management center based on the instruction format. The following table 1 shows the instruction format of the set communication transmission protocol provided in the embodiment of the present specification:

table 1 Preset Command Format of communication Transmission protocol

As shown in table 1, the instruction type is 5 bytes, and it should be noted that the instruction is expressed by ASCII codes during transmission, each ASCII code occupies 1 byte, the ASCII code "$" is used as a start symbol, and the following 4 bytes represent the instruction type. The instruction categories are two types: an alarm instruction and an alarm release instruction. The alarm instruction is "$ LSBJ", which is used in the personal positioning terminal and is used for transmitting the water falling alarm instruction to the shipborne Beidou terminal display and control unit of the mother ship after manual or automatic water falling trigger, and the display and control unit analyzes and displays the information content of the instruction and starts the audible and visual alarm. The alarm release instruction is "$LSBC", and is used at the personal positioning terminal, after manual or automatic false triggering, the alarm release instruction is manually turned off and transmitted to the shipborne Beidou terminal display and control unit of the mother ship, and the audible and visual alarm is turned off after the display and control unit analyzes the instruction. It can be seen from table 1 that the length is 2 bytes, which indicates the total number of bytes of data from the "instruction" initiator "$" to the "checksum" (including checksum), and the present protocol has a single instruction length 58.

The length of the user address is 3 bytes, which represents the local address of the shipborne Beidou terminal of the mother ship, namely an ID number, wherein the valid bit is 21 bits, and the high 3 bits are filled with '0'. The information content is 48 bytes in length and comprises 9 parameters including equipment type, alarm type, time, longitude, latitude, state information, equipment number, crew information and extension byte. And the binary original code is used for representing, each parameter item is filled according to the length required by the format, and when the length requirement is not met, the high order is complemented with 0. The information is transmitted in whole bytes, and the multi-byte information is transmitted in high order bytes and then in low order bytes. The checksum is 1 byte in length, representing the result of byte exclusive or from the "instruction" initiator "$" to the "checksum" preceding byte.

Further, it should be further noted that specific information of 9 parameters including a device type, an alarm type, time, longitude, latitude, status information, a device number, crew information, and an extension byte included in the information content is: the length of the equipment type is 1 byte, 0x01H, a fixed personal water falling positioning alarm terminal, and 0x02H, a separated personal positioning terminal. The alarm type length is 1 byte, 0x01H, automatic water falling alarm, 0x02H, manual water falling alarm. The time is Beijing time, the last two digits of the year (the last two digits of the year are represented by binary codes, such as 2010 are represented by 10), the month (1-12), the day (1-31), the hour (0-23), the minute (0-59) and the second (0-59) are 1 byte respectively, and the total is 6 bytes. Longitude: the range (E represents east longitude and W represents west longitude), the degree (0-180), the minute (0-59), the second (0-59) and the 0.1 second (0-9) are 1 byte, and the total is 5 bytes. Latitude: the range (N represents north latitude and S represents south latitude), the degree (0-90), the minute (0-59), the second (0-59) and the 0.1 second (0-9) are 1 byte each, and the total is 5 bytes. The length of the state information is 1 byte, and the state information consists of a positioning state P, a north-south latitude mark W, a east-west longitude mark J, RD positioning mark B and a battery residual capacity VV, wherein the total of 6 bits of valid bits is higher than the 2 bits, and the 0 is filled. The equipment number length is 1 byte, represents the personal water falling positioning alarm terminal matched with the mother ship, and is numbered from 1 to 255 in sequence. The length of the crewman information is 20 bytes, and the crewman information comprises the name of the Chinese character of the crewman and the birth year and month. The extended byte length is 8 bytes as a spare byte. Table 2 below shows a form of indicating the positioning state provided in the embodiment of the present specification, and table 3 shows a form of indicating the state of the remaining battery circuit provided in the embodiment of the present specification.

Table 2 positioning status representation format

0

P

W

J

B

V

As shown in table 2 above, RNSS positioning status P: indicating the positioning state of RNSS, wherein 0-positioning is successful, and 1-positioning is unsuccessful (first default); north-south weft flag W: indicating whether the current position is in the south latitude or the north latitude, 0- - -the north latitude (default), 1- - -the south latitude; east-west longitude identifier J: indicating whether the current position is in east or west, 0- - -east (default), 1- - -west; RD positioning identification B: indicating whether the position carried by the data packet is obtained by RD active positioning, 0- - -not, 1- - -is (first default);

Table 3 status indication table of remaining battery circuits

State of charge value of battery	00	01	10	11
					Residual electric quantity	≤25％	25-50％	50-75％	≥75％

As can be seen from Table 3, when the state of charge value of the battery is "00", it indicates that the remaining charge is less than or equal to 25%; when the state of charge value of the battery is '01', the remaining power is 25% -50%; when the state of charge value of the battery is 10, the remaining power is 50% -70%; the state of charge value of the battery is 11"

When the residual electric quantity is more than or equal to 75 percent.

Specifically, in order to meet the requirements of the transmission power of the Beidou system, reliable transmission of the image is realized. In one or more embodiments of the present disclosure, image information is transmitted to a beidou satellite in a beidou communication system through a preset image transmission policy, and specifically includes the following procedures:

Firstly, a personal positioning terminal acquires constraint conditions of various Beidou satellites in a Beidou communication system; wherein, it should be noted that the constraint conditions include: transmit power, transmit information rate, transmit information length, etc. Specifically, the constraints are shown in table 4 below:

As can be seen from table 4, when transmitting in the first gear, the information rate is the lowest, the transmitting power is the lowest, and the information capacity of each transmission is the smallest; and when transmitting in the fourth gear, the information rate is highest, the transmitting power is largest, and the information capacity of each transmission is also largest. In order to meet the low power consumption requirement of the personal water falling positioning alarm terminal, the first gear is selected as the transmitting gear, and the transmitting power is the lowest (2W), so that the defect is that the information rate is only 2kbps, the inbound longest message is only 1882bits, and the one-time transmission of the shot image cannot be met. Therefore, in the embodiment of the present disclosure, the personal positioning terminal automatically segments the image information according to the acquired constraint condition, so as to obtain a plurality of image information packets to be transmitted, so that after the image information is segmented into a plurality of packets, each image information packet is transmitted for a plurality of times by transmitting power conforming to the beidou system. The built-in RD communication module in the personal positioning terminal transmits the information packets to be transmitted according to a preset packet loss retransmission mechanism so as to transmit the image information to the emergency rescue management center based on the Beidou communication system, thereby achieving the aim of reliably transmitting data.

After the Beidou communication system transmits the image information to the emergency rescue management center, the emergency rescue management center is convenient to assist in determining vital signs of current people falling into water so as to conveniently and quickly make rescue response. In the embodiment of the specification, after the image information is obtained, in order to quickly lock the person falling into water to analyze the sign information of the person falling into water, the image information needs to be intercepted to obtain the sub-image information containing the person falling into water, the temperature of the medium where the person falling into water is located and the time of falling into water, and the sub-image information, the temperature and the time of falling into water are input into a preset image classification model, so that the sign label corresponding to the person falling into water is obtained. It should be noted that, in order to obtain accuracy of increasing sign label recognition of person falling into water, before inputting the sub-image information into a preset image classification model, the method further includes the following steps: and acquiring different states of the person falling into water corresponding to the time of the person falling into water and the temperature of the medium where the person falling into water is located, so as to determine a plurality of classification layers of the preset deep learning model based on the different states of the person falling into water. And then crawling rescue videos of people falling into water in each public website, acquiring key frames of the rescue videos based on preset acquisition frequency, marking physical sign information of the people falling into water, the temperature of a medium where the people falling into water are located and the rescue time of the people falling into water contained in the key frames of the rescue videos, and acquiring corresponding key frame marking images, wherein each key frame marking image is used as a training sample of a deep learning model. Training the deep learning model with a plurality of classification layers based on the training sample to obtain an image classification model meeting the requirements, and identifying sub-image information according to the image classification model to obtain sign labels of people falling into water. After the offshore rescue equipment obtains the sign label corresponding to the person falling into water, the sign label is displayed on a display screen of an emergency rescue management center, so that rescue limit time of the person falling into water is predicted by the rescue personnel of the emergency rescue management center based on the information of the sign label, and the ship organization where each ship-borne Beidou terminal equipment is located can be quickly searched for rescue action in the rescue limit time.

S106: the emergency rescue management center obtains shipborne Beidou terminal equipment in a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal equipment in the preset range through the Beidou communication system, so that ships where the shipborne Beidou terminal equipment is located in the preset range rescue people falling into water.

According to the embodiment of the specification, after the alarm instruction is transmitted to the emergency rescue management center according to the step S105, in order to realize rapid rescue for people falling into water, the emergency rescue management center obtains the on-board Beidou terminal equipment in a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the on-board Beidou terminal equipment in the preset range through the Beidou communication system, so that ships where the on-board Beidou terminal equipment in the preset range are located rescue the people falling into water.

Specifically, in one or more embodiments of the present disclosure, before the emergency rescue management center obtains the on-board beidou terminal device within the preset range based on the position information in the alarm instruction, the method further includes:

The emergency rescue management center analyzes the alarm instruction according to a preset communication transmission protocol, so that the ID number of the mother ship on-board Beidou terminal in the alarm information is obtained. And then, the emergency rescue management center sends alarm confirmation information to the on-board Beidou terminal of the mother ship according to the on-board Beidou terminal ID number of the mother ship. The alarm confirmation information is used for confirming whether the user corresponding to the personal positioning terminal falls into water or not to the shipborne Beidou terminal of the mother ship. If the emergency rescue management center receives the return information of the on-board Beidou terminal of the mother ship in response to the event confirmation information, whether the alarm instruction has a false alarm problem or not is determined according to the return information.

As shown in fig. 6, the emergency rescue management center firstly contacts the ship through a Beidou short message or a satellite phone according to the on-board Beidou terminal ID number of the mother ship in the alarm information to confirm whether the ship is triggered by mistake or not or the equipment is triggered by mistake automatically. If the person is confirmed to trigger by mistake, the personal falling water positioning alarm terminal is instructed to be closed manually, and related personnel are warned; if the equipment is confirmed to be triggered by mistake, the personal water falling positioning alarm terminal is commanded to be closed manually, the environmental condition of the equipment triggered by mistake at the moment is known, and the equipment manufacturer is contacted to carry out technical support if necessary. If the accident of falling into water does occur if the false triggering is confirmed, inquiring whether the mother ship can complete self-rescue. If the mother ship can complete self-rescue, the on-shore emergency rescue management center finishes the alarm response. If the mother ship cannot complete self rescue or cannot get in touch with the mother ship for a long time, according to the information of the position of falling water, taking the position as the center, taking the X sea as the radius (X is determined according to the actual situation), and informing a ship loaded with a shipborne Beidou terminal in the radius area by using a Beidou short message through a Beidou satellite through a Beidou director to implement mutual rescue on the personnel falling into water. The Beidou command machine is divided into a Beidou second command machine and a Beidou third command machine, the Beidou second command machine communicates with the ship loaded with the Beidou second terminal, informs the position information of people falling into water and organizes rescue; the Beidou No. three command machine is used for communicating the ship loaded with the Beidou No. three terminal, notifying the position information of the person falling into the water and organizing rescue. According to the method, when a mother ship is in danger and is submerged or a person falling into water deviates from the mother ship far due to bad weather, beidou RD communication is utilized to ask for help to an on-shore emergency rescue management center, and surrounding ships, rescue aircraft and rescue ships are organized for rescue. The device effectively solves the problem that the pain point of timely rescue cannot be obtained under the conditions that the mother ship is submerged and no ship exists in a certain peripheral range by utilizing the water falling positioning alarm device of short-distance wireless communication. Meanwhile, the on-shore emergency rescue management center can avoid public resource waste caused by blind organization of rescue force and starting of rescue aircraft and rescue ships due to false triggering through a false alarm confirmation mechanism.

As shown in fig. 7, in one or more embodiments of the present disclosure, there is provided an emergency rescue device for use in an offshore distress emergency system including a personal positioning terminal, a shipboard beidou terminal device, an emergency rescue management center, and a beidou communication system, where the device includes:

At least one processor; and

A memory communicatively coupled to the at least one processor; wherein,

The at least one processor has stored thereon executable instructions for the at least one processor to enable the at least one processor to perform:

the personal positioning terminal starts the working state according to linkage triggering of a plurality of built-in sensor switches, and obtains the water falling information of a user based on a built-in positioning module and acquisition equipment; wherein, the water falling information includes: positioning information and image information;

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for apparatus, devices, non-volatile computer storage medium embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the section of the method embodiments being relevant.

The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

The foregoing is merely one or more embodiments of the present description and is not intended to limit the present description. Various modifications and alterations to one or more embodiments of this description will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of one or more embodiments of the present description, is intended to be included within the scope of the claims of the present description.

Claims

1. The emergency rescue method for the marine distress is characterized by being applied to a marine distress emergency system consisting of a personal positioning terminal, shipborne Beidou terminal equipment, an emergency rescue management center and a Beidou communication system, and comprises the following steps:

The emergency rescue management center obtains shipborne Beidou terminal equipment in a preset range based on the position information in the alarm instruction, and sends the position information and the image information to the shipborne Beidou terminal equipment in the preset range through the Beidou communication system so that ships where the shipborne Beidou terminal equipment is located in the preset range rescue people falling into water;

the personal positioning terminal is triggered according to the linkage of a plurality of built-in sensor switches, and the starting working state specifically comprises:

if the personal positioning terminal determines that the corresponding first sensor switch and the corresponding second sensor switch are triggered, the personal positioning terminal starts a working state;

the method for acquiring the water falling information of the water falling person based on the built-in positioning module and the acquisition equipment comprises the following steps:

The personal positioning terminal takes the image information and the positioning information as the water falling information of the water falling person;

The emergency rescue management center is used for acquiring the shipborne Beidou terminal equipment in a preset range based on the position information in the alarm instruction, and the method further comprises the following steps:

the emergency rescue management center analyzes the alarm instruction based on a preset communication transmission protocol to obtain a mother ship on-board Beidou terminal ID number in the alarm instruction;

If the emergency rescue management center receives feedback information of the shipborne Beidou terminal of the mother ship responding to the alarm confirmation information, determining whether the alarm instruction is misreported or not based on the feedback information;

After the personal positioning terminal sends the alarm instruction and the image information to the shipborne Beidou terminal equipment of the mother ship through the built-in wireless communication module, the method further comprises the following steps:

Intercepting sub-image information containing people falling into water from the image information, and acquiring the temperature of a medium where the current people falling into water are located and the water falling time of the people falling into water;

acquiring the falling time of the falling person and different states of the falling person corresponding to the temperature of a medium where the falling person is located, so as to determine a plurality of classification layers of a preset deep learning model based on the different states of the falling person;

Crawling rescue videos of people falling into water in each public website, acquiring key frames of the rescue videos based on preset acquisition frequency, marking physical sign information of the people falling into water, the temperature of a medium where the people falling into water are located and rescue time of the people falling into water, which are contained in the key frames of the rescue videos, and acquiring corresponding key frame marked images;

taking each key frame labeling image as a training sample of the deep learning model, and training the deep learning model with a plurality of classification layers based on the training sample to obtain an image classification model meeting the requirements;

And inputting the sub-image information, the temperature and the water falling time into a preset image classification model to obtain sign labels corresponding to the water falling personnel.

2. The emergency rescue method for marine distress according to claim 1, wherein the personal positioning terminal obtains positioning information of the personal positioning terminal based on a built-in beidou RD communication module and the beidou communication system, and specifically includes:

3. The emergency rescue method for the marine distress according to claim 1, wherein the personal positioning terminal sends the alarm instruction and the image information to the shipborne Beidou terminal equipment of the mother ship through a preset wireless communication module so as to determine a rescue mode of people falling into water based on the response of the shipborne Beidou terminal equipment, and specifically comprises:

4. The emergency rescue method for the marine distress according to claim 1, wherein the on-board beidou terminal device of the mother ship receives the alarm instruction and the image information, and performs analysis and alarm based on the alarm instruction and the image information, and specifically comprises:

5. The emergency rescue method for marine distress according to claim 1, wherein the personal water falling positioning transmits the alarm command and the image information to the emergency rescue management center through a built-in RD communication module and the beidou communication system, and specifically comprises:

6. The method for emergency rescue of marine distress according to claim 5, wherein said transmitting said alarm command to a beidou satellite in said beidou communication system based on a preset alarm communication protocol, specifically comprises:

7. The method for emergency rescue in marine distress according to claim 5, wherein the transmitting the image information to the beidou satellite in the beidou communication system through a preset image transmission strategy specifically comprises:

the personal positioning terminal acquires constraint conditions of various Beidou satellites in the Beidou communication system; wherein the constraint condition includes: transmitting power, transmitting information rate and transmitting information length;

And the built-in RD communication module in the personal positioning terminal transmits the plurality of image information packets to be transmitted according to a preset packet loss retransmission mechanism so as to transmit the image information to the emergency rescue management center based on the Beidou communication system.

8. The emergency rescue method for marine distress according to claim 1, wherein the personal positioning terminal is triggered according to linkage of a plurality of built-in sensor switches, and after the operating state is started, the method further comprises:

9. The utility model provides an emergency rescue equipment in marine distress, its characterized in that is applied to the marine distress emergency system who comprises personal positioning terminal, on-board big dipper terminal equipment, emergent rescue management center, big dipper communication system, the equipment includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the at least one memory stores executable instructions for the at least one processor to enable the at least one processor to perform the method of any one of the preceding claims 1-8.