CN209396012U - Life saving system for Swimming pool - Google Patents
Life saving system for Swimming pool Download PDFInfo
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- CN209396012U CN209396012U CN201821875386.0U CN201821875386U CN209396012U CN 209396012 U CN209396012 U CN 209396012U CN 201821875386 U CN201821875386 U CN 201821875386U CN 209396012 U CN209396012 U CN 209396012U
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Abstract
The utility model discloses a kind of life saving systems for Swimming pool; it include: at least one audiomonitor and background terminal for being mounted on monitoring and protection equipment, corresponding Swimming pool setting with swimmer; the system passes through monitoring and the state of protection equipment monitoring swimmer; when swimmer, which is in, to drown; it sends an SOS, while emergency protection is carried out to swimmer；Distress signal is received additionally by audiomonitor, and is transferred to background terminal after handling distress signal, so that background terminal according to treated alarm by distress signal；Whole system lays convenience, response in time, greatly facilitates the safety management of Swimming pool, can effectively reduce the response time of contingency, to substantially increase the efficiency of rescue, while can also mitigate the operating pressure of lifeguard significantly.
Description
Technical Field
The utility model relates to a lifesaving technical field, in particular to a lifesaving system for swimming place.
Background
Swimming is a healthy sports which is deeply loved by people, but people inevitably have drowning phenomenon of swimmers in the swimming process, particularly for beginners, due to the influence of various factors, and if the swimming is not helped in time, the swimmers lose precious lives.
At present, a plurality of lifeguards are equipped in each swimming place to ensure the safety of swimming enthusiasts, but the traditional manpower supervision mode has certain limitation, the lifeguards are difficult to keep high concentration for a long time due to the physiological conditions of people, and the swimming places are often loud and noisy, and the drowning state of some swimmers cannot be found by equipping the lifeguards alone, so that the best rescue time is missed.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent. Therefore, an object of the utility model is to provide a lifesaving system for swimming place, through the accuracy of guaranteeing the accurate transmission and the location of signal under water, guarantee the system and in time, reliably send the early warning to drowned personnel, reduce the emergence of drowned event by a wide margin to improve rescue efficiency greatly, also can alleviate lifeguard's operating pressure greatly simultaneously.
In order to achieve the above object, an embodiment of the present invention provides a lifesaving system for swimming place, including: the monitoring and protecting equipment comprises an air bag protecting component and a first energy converter, is arranged on a swimmer to monitor the state information of the swimmer, and sends a distress signal through the first energy converter when judging that the swimmer is in a drowned state according to the state information of the swimmer, and simultaneously triggers the air bag protecting component to work so as to carry out emergency protection on the swimmer; the monitoring equipment and the signal sending assembly are in underwater acoustic communication so as to receive the distress signal, and the distress signal is processed and then transmitted; and the background terminal is communicated with the monitoring equipment to receive the processed distress signal and give an alarm according to the processed distress signal.
According to the lifesaving system for the swimming place, the monitoring and protecting equipment is arranged and comprises the air bag protecting component and the first energy converter, and the monitoring and protecting equipment is arranged on the body of the swimmer to monitor the state information of the swimmer, so that when the monitoring and protecting equipment judges that the swimmer is in a drowned state according to the state information of the swimmer, the first energy converter sends out a distress signal, and the air bag protecting component is triggered to work to carry out emergency protection on the swimmer; in addition, at least one monitoring device is arranged corresponding to the swimming place, and the monitoring device and the signal sending assembly are in underwater acoustic communication to receive the distress signal and transmit the distress signal after processing the distress signal; the background terminal communicates with the monitoring equipment to receive the processed distress signal and gives an alarm according to the processed distress signal. Therefore, the whole system is convenient to arrange and timely in response, safety management of swimming places is greatly facilitated, response time of accidents can be effectively shortened, rescue efficiency is greatly improved, and meanwhile working pressure of lifeguards can be greatly relieved.
In addition, the lifesaving system for the swimming place provided by the above embodiment of the invention can also have the following additional technical features:
optionally, the monitoring and protection device further includes: a speed sensor to collect speed information of the swimmer in a vertical direction; a heart rate sensor to collect heart rate information of the swimmer; the controller, the controller respectively with speed sensor the heart rate sensor first transducer with the gasbag protection subassembly links to each other, the controller is according to the swimmer in the speed information of vertical direction with the judgement of swimmer's heart rate information whether the swimmer is in drowned state, and the swimmer is in control when drowned state gasbag protection subassembly is worked and is generated distress request signal, and will distress request signal send for first transducer, so that first transducer will send after distress request signal conversion is distress signal.
Optionally, the monitoring and protection device further includes a first power module and a key module, the first power module is configured to supply power to the monitoring and protection device, and the key module is configured to receive an active trigger instruction of the swimmer, and send the active trigger instruction to the controller, so that the controller generates an active distress request signal according to the active trigger instruction.
Optionally, the monitoring and protection device is made in a wearable manner.
Optionally, the monitoring device includes a second transducer, a processor module, a wireless transmission module and a second power module, the second transducer is connected to the processor module, the second transducer receives the distress signal sent by the first transducer, converts the distress signal into an electrical signal and sends the electrical signal to the processor module, the processor module is connected to the wireless transmission module, the processor module performs denoising and amplifying processing on the electrical signal and then performs wireless transmission through the wireless transmission module, and the second power module is used for supplying power to the monitoring device.
Optionally, the background terminal includes: the wireless receiving module is used for receiving the processed distress signal sent by the wireless transmission module; the audible and visual alarm is used for sending audible and visual alarm information; the main control module is respectively connected with the wireless receiving module and the audible and visual alarm, and the main control module controls the audible and visual alarm to work according to the processed distress signal.
Optionally, the number of the listening devices is multiple.
Optionally, the background terminal includes a display, the display is connected with the main control module, wherein, the main control module is further according to every distress signal that monitoring equipment sent utilizes positioning algorithm to obtain the swimmer that is in drowned state and every distance between the monitoring equipment is in order to confirm the position of the swimmer that is in drowned state, and control the display shows the position of the swimmer that is in drowned state.
Optionally, the background terminal and the listening device are in wireless communication through WIFI, a 4G network, or a 5G network.
Optionally, the distress signal is a Chirp signal with a center frequency of less than or equal to 40kHZ, the Chirp signal structurally includes an awake frequency point, an LFM signal and a data code, the data code records the time and the ID number of local transmission, the awake frequency F1 is used for system handshake, and the LFM signal is used for refining synchronization and ranging.
Drawings
Fig. 1 is a schematic structural view of a life saving system for a swimming place according to an embodiment of the present invention;
fig. 2 is a block schematic diagram of a life saving system for a swimming place according to an embodiment of the invention;
fig. 3 is a schematic view of the operation of a life saving system for swimming place according to an embodiment of the present invention;
fig. 4 is a block schematic diagram of a monitoring and protection device of a life saving system for swimming pools, according to an embodiment of the present invention;
fig. 5 is a schematic directional diagram of a quick-disconnect sensor for a life-saving system for a swimming place according to an embodiment of the present invention;
fig. 6 is a block schematic diagram of a monitoring device of a life saving system for a swimming place according to an embodiment of the present invention;
fig. 7 is a block schematic diagram of a backend terminal of a life saving system for a swimming pool according to an embodiment of the invention;
fig. 8 is a node coordinate map of a positioning algorithm for a life saving system for a swimming place according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a time delay estimation correction algorithm of a life saving system for a swimming place according to an embodiment of the present invention;
fig. 10 is a block schematic diagram of an adaptive dynamic threshold for a life saving system for a swimming pool according to an embodiment of the present invention;
fig. 11 is a cross-correlation and FRFT result of a signal gradually sliding into a window of a life saving system for a swimming pool according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The lifesaving system for the swimming place provided by the embodiment of the utility model monitors the state of the swimmer through the monitoring and protecting equipment, and sends out a distress signal when the swimmer is drowned, and simultaneously carries out emergency protection on the swimmer; in addition, the monitoring equipment receives the distress signal, processes the distress signal and transmits the distress signal to the background terminal, so that the background terminal can give an alarm according to the processed distress signal; the system solves the problem that drowning events are increased greatly due to untimely rescue in the existing swimming place, the whole system is convenient to lay and timely in response, safety management of the swimming place is greatly facilitated, response time of accidents can be effectively shortened, rescue efficiency is greatly improved, and meanwhile working pressure of life savers can be greatly reduced.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
As shown in fig. 1 and 2, the life saving system 1000 for a swimming place includes a monitoring and protecting device 100, a monitoring device 200, and a background terminal 300.
The monitoring and protecting device 100 comprises an air bag protecting component 110 and a first transducer 120, the monitoring and protecting device 100 is installed on a swimmer to monitor the state information of the swimmer, and when the swimmer is judged to be in a drowned state according to the state information of the swimmer, a distress signal is sent out through the first transducer 120, and meanwhile, the air bag protecting component 110 is triggered to work to carry out emergency protection on the swimmer.
As a specific example, the swimming place may be a bathing beach, which is not limited by the present invention.
As an example, the monitoring and protection device 100 is made in a wearable manner, and can be made as a belt to be worn on the waist of a swimmer; when detecting that the swimmer is in a drowning state, the first transducer 120 sends a distress signal and triggers an air bag inside the waistband to carry out emergency protection on the drowning swimmer.
The monitoring equipment 200 and the signal sending component perform underwater acoustic communication to receive the distress signal and transmit the distress signal after processing the distress signal, wherein the monitoring equipment 200 corresponds to at least one monitoring equipment 200 arranged in the swimming place.
As one example, the monitoring devices 200 are four, and are disposed at four corners of the swimming place.
As an embodiment, there are three monitoring devices 200, and the monitoring devices 200 are three buoys distributed in the swimming area, and the buoys are electrically connected through radio.
As an embodiment, there is one listening device 200, and three sensors are bound to the listening device 200 to form a measurement array.
As an embodiment, the monitoring device 200 determines the positioning direction and distance of the distress signal by receiving the time difference.
The background terminal 300 communicates with the monitoring device 200 to receive the processed distress signal and gives an alarm according to the processed distress signal.
As an embodiment, the background terminal 300 and the monitoring device 200 wirelessly communicate with each other through WIFI, 4G network, or 5G network, and determine the position of the drowning person through a positioning algorithm to perform display and audible and visual alarm.
As an embodiment, the distress signal is a Chirp signal with a center frequency of 20kHz (the transmission structure is a wakeup frequency point + LFM signal + data code, the data code records the time and ID number of local transmission, the wakeup frequency F1 is used for system handshake, and the LFM signal is used for fine synchronization and ranging).
As an embodiment, the distress signal is a Chirp signal with a center frequency of 35kHz (the transmission structure is a wakeup frequency point + LFM signal + data code, the data code records the time and ID number of local transmission, the wakeup frequency F1 is used for system handshake, and the LFM signal is used for fine synchronization and ranging).
In one embodiment of the present invention, as shown in fig. 3, the positions of the monitoring devices 200 placed around the swimming pool are precisely determined in advance and are converted into position coordinates to be displayed at the background terminal 300 according to a certain ratio. When a swimmer swims in the water, the monitoring and protecting device 100 is turned on, and the monitoring and protecting device 100 detects speed information of the swimmer in the vertical direction and heart rate information of the swimmer and judges whether the swimmer is in a drowning state through a motion analysis algorithm and a preset heart rate threshold. When the system judges that the swimmer is in a drowning state or triggers the active distress button, the monitoring and protecting device 100 generates a distress signal with time and sends the distress signal to the monitoring device 200, the air bag protecting component 110 is triggered to inflate to pull the drowned swimmer to the water surface, the monitoring device 200 performs denoising and amplifying processing on the signal and then sends the signal to the background terminal 300, and the background terminal 300 determines the position of the drowned swimmer through a positioning analysis algorithm and displays the position.
In an embodiment of the present invention, as shown in fig. 4, the monitoring and protecting device 100 further includes: a speed sensor 160, a heart rate sensor 150, a controller 130, a first power module 170, and a key module 140.
Wherein, the speed sensor 160 is used for collecting the speed information of the swimmer in the vertical direction; the heart rate sensor 150 is used for collecting the heart rate information of the swimmer; the controller 130 is respectively connected with the speed sensor 160, the heart rate sensor 150, the first transducer 120 and the air bag protection assembly 110, the controller 130 judges whether the swimmer is in a drowned state according to the speed information of the swimmer in the vertical direction and the heart rate information of the swimmer, controls the air bag protection assembly 110 to work and generate a distress request signal when the swimmer is in the drowned state, and sends the distress request signal to the first transducer 120 so that the first transducer 120 converts the distress request signal into a distress signal and sends the distress signal; the first power module 170 is configured to provide power to the monitoring and protection device 100, and the button module 140 is configured to receive an active triggering instruction of the swimmer and send the active triggering instruction to the controller 130, so that the controller 130 generates an active distress request signal according to the active triggering instruction.
As an example, the heart rate sensor 150 is an infrared pulse sensor; the key module 140 includes an active distress button and a power button, and is protected by a waterproof protective cover; when the swimmer finds that the swimmer is or is about to be in a drowned state and still consciously, the swimmer can actively press the key of the help seeking button to alarm and save oneself; the power button is used to turn the monitoring and protection device 100 on or off.
As one example, the speed sensor has SPI and I2And C, digital output function.
Specifically, the monitoring and protection device 100 measures the speed of the swimmer in the vertical direction through the speed sensor 160, detects the heart rate of the swimmer through the heart rate sensor 150, and determines the state of the swimmer through a swimming analysis algorithm, if the swimmer is in a drowned state, or the swimmer feels uncomfortable or other emergencies trigger an active help-seeking button, the monitoring and protection device 100 generates an electric signal through the controller 130, the first transducer 120 converts the electric signal into a hydroacoustic signal, the signal is sent through a hydroacoustic channel, and simultaneously triggers the internal air bag protection component 110, and the air bag protection component 110 is filled with air for a short time to pull the drowned swimmer to the water surface.
The controller is further used for acquiring the speed change rate according to the speed information of the swimmer in the vertical direction, acquiring the heart rate change rate according to the heart rate information of the swimmer, and judging that the swimmer is in a drowning state when the speed of the swimmer in the vertical direction is a negative value, the speed change rate is greater than a first preset value, the heart rate of the swimmer reaches a first preset heart rate threshold value, and the heart rate change rate reaches a second preset value.
As an embodiment, the swimming analysis algorithm determines whether the swimmer is in a drowned state by determining a state of the swimmer; when a swimmer swims, the advancing direction of the human body is the direction of the speed sensor (hereinafter referred to as X), and specifically as shown in fig. 5, the value acquired by the speed sensor is large, generally about 0-2m/s, and a negative value does not occur; when a swimmer stands and plays in water, the vertical direction of a human body is the X direction, the speed is low, the swimmer generally floats up and down at 0, and the change frequency is low; when a person drowns, the vertical direction of the human body is the X direction, the speed is higher, the change is generally repeated from top to bottom at 0, and the change frequency is higher; the swimmer's state can therefore be determined from the difference in speed in the direction X in the water. In addition, normal adults have significant individual variability in heart rate at rest, on average around 75 beats/minute (between 60 and 100 beats/minute), and during swimming, heart rate is somewhat higher but tends to be stable; in the early stage of drowning, the vital sign changes are mainly as follows: in a short time, the heart rate becomes faster first and then slower; the heart rate change rate is obviously larger when drowning than when swimming. Thus, the exercise analysis algorithm analyzes data transmitted from the speed sensor and the heart rate sensor, and calculates a speed change rate a1 and a heart rate change rate a 2. Once the human body is detected to have a negative speed in the vertical direction, repeatedly beats up and down at 0, and the speed change frequency is high, that is, the speed change rate a1 is high, and meanwhile, the heart rate and the heart rate change rate a2 both reach the threshold value (the heart rate threshold value can be measured and processed after the power-on process because the heart rate information of each person is different), and the operation lasts for 1-2S, that is, the controller 130 determines that the person is drowned.
In one embodiment of the present invention, as shown in fig. 6, the listening device 200 comprises a second transducer 210, a processor module 220, a wireless transmission module 230, and a second power module 240.
The second transducer 210 is connected to the processor module 220, the second transducer 210 receives the distress signal sent by the first transducer 120, converts the distress signal into an electrical signal and sends the electrical signal to the processor module 220, the processor module 220 is connected to the wireless transmission module 230, the processor module 220 performs denoising and amplifying processing on the electrical signal and then performs wireless transmission through the wireless transmission module 230, and the second power supply module 240 is used for supplying power to the monitoring device 200.
That is, the second transducer 210 of the monitoring device 200 converts the received underwater acoustic signal into an electrical signal, and the electrical signal is processed by denoising and amplifying and then wirelessly transmitted by the wireless transmission module 230.
In an embodiment of the present invention, as shown in fig. 7, the background terminal includes a wireless receiving module 330, an audible and visual alarm 320, a main control module 310, and a display 340.
The wireless receiving module 330 is configured to receive the processed distress signal sent by the wireless transmitting module 230; the audible and visual alarm 320 is used for sending audible and visual alarm information; the main control module 310 is respectively connected with the wireless receiving module 330 and the audible and visual alarm 320, and the main control module 310 controls the audible and visual alarm 320 to work according to the processed distress signal; the display 340 is connected to the main control module 310, and the main control module further obtains a distance between the swimmer in the drowning state and each monitoring device 200 by using a positioning algorithm according to the distress signal sent by each monitoring device 200 to determine the position of the swimmer in the drowning state, and controls the display 340 to display the position of the swimmer in the drowning state.
As an example, the Chirp signal is also called a linear-frequency modulated (LFM), and its time and frequency are linear, and can be expressed as:
x(t)＝cos(2πf0t+πkt2),0≤t≤T
in the formula f0And k represent the starting frequency and the tuning frequency, respectively. And if k is a positive number, the signal is an up-Chirp signal, and if k is a negative number, the signal is a down-Chirp signal, and T is the time width of the linear frequency modulation signal.
Taking Chirp up-sweep as an example, the mathematical expression of the impulse response function of the matched filter is as follows:
h(t)＝cos(2πf0t-πkt2),0≤t≤T
its output through the matched filter is then:
from the above formula, it can be seen that the main lobe width of the signal is 2/B, and the height of the main lobe isAnd the larger the BT value is, the higher the peak value output after matching filtering is, the output result has the characteristics of an impulse spectrum peak, and the detection and the capture of a Chirp signal synchronization head are facilitated. The peak value of g (t) appears at the moment when t is 0, and the peak value deviation is related to the time delay change of the Chirp signal.
As shown in fig. 9 and 10, the signal to be received r (t) is composed of a signal x (t- τ) which is a delayed Chirp signal to be received, and noise n (t) which is represented by a mean 0 and a variance n0N (τ) represents a function of the delay time τ:
R(t)＝x(t-τ)+n(τ)
assuming y (t) as the interfering false alarm signal, the synchronization signal receiving end selects from two possible hypotheses according to a hypothesis testing method:
H0:R(t)＝y(t-τ)+n(τ)
H1:R(t)＝x(t-τ)+n(τ)
from the above analysis, the detection principle of the matched filtering method for the time synchronization signal is as follows: and performing correlation operation on the received signal and the local replica signal, wherein the cross-correlation result comprises the correlation result of the signal part and the noise part, selecting the maximum value of a correlation peak by the traditional matched filtering method, comparing the peak with a fixed threshold, and if the correlation peak is greater than the threshold, considering that the synchronization is successful, otherwise, judging that the synchronization is unsuccessful. However, in a complex and variable underwater acoustic channel environment, the fixed threshold value is set to be large enough to ensure minimization of a false alarm, and to be small enough to ensure that a valid signal can be captured when signal attenuation is strong, so that a good synchronization result is difficult to obtain. The utility model discloses a solve the problem of fixed threshold, adopt the relevant result of quadrature as certainlyAdapting the dynamic threshold, the cross-correlation result of the orthogonal reference sequence with the received signal is shown as C due to the mismatch of the signal part and the orthogonal reference sequence0(t) contains only the correlation results of the ambient noise component.
In the formula: c (t) represents the cross-correlation value of the received sequence R (t) with the local reference sequence r (t), C0(t) denotes the sequence R (t) and the local orthogonal reference sequence r0(t) cross-correlation value, NcFor the length of each window, k represents the kth window.
And taking the orthogonal correlation result as a self-adaptive dynamic threshold, evaluating the real-time noise level of the underwater acoustic channel, better adapting to the complex and changeable underwater acoustic channel environment, and if the correlation result of the receiving sequence exceeds the dynamic threshold, considering that the synchronous signal possibly reaches. And when the suspected signal appears, the correlation result is far higher than the threshold, and the synchronous signal is considered to be possibly captured.
As shown in fig. 9, the Chirp signal is an impulse function at an FRFT of a suitable order, and this characteristic is called fractional order aggregation characteristic of the Chirp signal, which can perform effective signal detection; meanwhile, the FRFT also has frequency shift characteristics and is suitable for detecting a Chirp signal with Doppler frequency shift.
The p-order FRFT of the signal x (t) can be defined as a linear integral of the form:
wherein,
is the kernel function of FRFT, p is the order of fractional Fourier transform, α represents the time-frequency axis rotation angle
p ≠ 2n (n is an integer).
Can be simplified into
Frequency modulation of signalWhen the temperature of the water is higher than the set temperature,
namely, on the FRFT domain with proper order, the Chirp signal will show obvious fractional order aggregation characteristic, and the energy is aggregated at u-f0sin α point.
To further solve the false alarm signaling problem, the fractional order aggregation property of the FRFT is combined and a modulus squared calculation is performed with U, as shown below
U＝|F(p)+F(n)|2＝F2(p)+2|F(p)F(n)|+F2(n)
Wherein F (p) and F (n) represent FRFT transform values of the signal portion and the noise portion, respectively, and let 2| F (p) F (n) | + F2(n)＝N1The above formula can be simplified to
U＝|F(p)+F(n)|2＝F2(p)+N1
Let WstFor the matched filter result, the correlation result is represented by W
W＝std(Wst)
As shown in fig. 11, the energy accumulation of the FRFT and the matched filtering peak exhibit similar waveforms, and both exhibit positive correlation with the time length of the signal.
Since the peak position of the FRFT is not exactly the same as the position where the matched filtered peak appears, we choose the standard deviation WstAs a decision threshold, the peak value characteristic can be reflected and converted into a window equal-length form, so that the sliding window processing process is facilitated. When the effective signal arrives, the signal peak value will exceed the set threshold, and the synchronous signal can be captured.
Therefore, the utility model discloses utilize FRFT can realize the good characteristic of signal noise separation on suitable order, detect again the synchronous result of catching to revise the time delay error.
As an embodiment, after the time delay is estimated, the positioning information is resolved by the TOA positioning principle.
Generally, a spherical model is adopted for positioning intersection solution, the coordinates of an object to be positioned are assumed to be (x, y, z), and the positions of three anchor nodes are (x) respectively1,y1,z1)，(x2,y2,z2) And (x)3,y3,z3) (ii) a The depth h of the object to be positioned and the depth information z of each anchor node1,z2,z3Can be obtained by a depth sensor additionally arranged on the device, so that the three-dimensional positioning problem can be converted into a two-dimensional plane position estimation problem in the horizontal direction, as shown in fig. 8.
Then the formula of TOA calculation yields:
and (3) simultaneously solving an equation set to obtain the coordinates of the target to be positioned, namely:
wherein s is1,s2,s3Respectively the distance of the underwater target to the buoy node. This distance can be obtained by multiplying the time delay by the speed of sound. Finally, calculating the z-axis coordinate through the pythagorean theorem, and respectively using s in consideration of actual measurement errors1,s2,s3Calculate z-axis coordinate and then average:
meanwhile, in the actual positioning process, the distance between the target node and the reference node is obtained by multiplying the propagation time of the acoustic signal by the estimated sound velocity, and the distance calculated by adopting the fixed sound velocity has certain error because the sound ray of the underwater channel is propagated in a bending way, so that the positioning precision is influenced.
Irrespective of variations in speed of sound, c1＝c2＝c3＝c0In order to be a constant value,
specifically, the positioning algorithm sets an adaptive dynamic threshold capture synchronous signal according to a matched filtering method, FRFT is performed by utilizing the characteristic that FRFT realizes signal and noise separation in a proper order, false alarm signals are removed, delay error correction is performed through the peak offset of FRFT, time delay is estimated, positioning information is resolved, and then the positioning information is packaged into frames, cloud data calculation is applied by WIFI, the cloud data is processed and then returned to a background terminal, the background terminal collects all positioning data and performs positioning display, so that a rescuer can quickly know the position of a drowner, and rescue efficiency is improved.
According to the lifesaving system for the swimming place, the monitoring and protecting equipment is arranged and comprises the air bag protecting component and the first energy converter, and the monitoring and protecting equipment is arranged on the body of the swimmer to monitor the state information of the swimmer, so that when the monitoring and protecting equipment judges that the swimmer is in a drowned state according to the state information of the swimmer, the first energy converter sends out a distress signal, and the air bag protecting component is triggered to work to carry out emergency protection on the swimmer; in addition, at least one monitoring device is arranged corresponding to the swimming place, and the monitoring device and the signal sending assembly are in underwater acoustic communication to receive the distress signal and transmit the distress signal after processing the distress signal; the background terminal communicates with the monitoring equipment to receive the processed distress signal and gives an alarm according to the processed distress signal. Therefore, the whole system is convenient to arrange and timely in response, safety management of swimming places is greatly facilitated, response time of accidents can be effectively shortened, rescue efficiency is greatly improved, and meanwhile working pressure of lifeguards can be greatly relieved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A life saving system for a swimming pool, comprising:
the monitoring and protecting equipment comprises an air bag protecting component and a first energy converter, is arranged on a swimmer to monitor the state information of the swimmer, and sends a distress signal through the first energy converter when judging that the swimmer is in a drowned state according to the state information of the swimmer, and simultaneously triggers the air bag protecting component to work so as to carry out emergency protection on the swimmer;
the monitoring equipment and the signal sending assembly are in underwater acoustic communication so as to receive the distress signal, and the distress signal is processed and then transmitted;
and the background terminal is communicated with the monitoring equipment to receive the processed distress signal and give an alarm according to the processed distress signal.
2. A life saving system for a swimming pool according to claim 1, wherein the monitoring and protection device further comprises:
a speed sensor to collect speed information of the swimmer in a vertical direction;
a heart rate sensor to collect heart rate information of the swimmer;
the controller, the controller respectively with speed sensor the heart rate sensor first transducer with the gasbag protection subassembly links to each other, the controller is according to the swimmer in the speed information of vertical direction with the judgement of swimmer's heart rate information whether the swimmer is in drowned state, and the swimmer is in control when drowned state gasbag protection subassembly is worked and is generated distress request signal, and will distress request signal send for first transducer, so that first transducer will send after distress request signal conversion is distress signal.
3. The life saving system for swimming place according to claim 2, wherein the monitoring and protecting device further comprises a first power module and a button module, the first power module is used for supplying power to the monitoring and protecting device, the button module is used for receiving the active triggering instruction of the swimmer and sending the active triggering instruction to the controller, so that the controller generates an active distress request signal according to the active triggering instruction.
4. A life saving system for a swimming pool according to claim 2, wherein the monitoring and protection device is made in a wearable manner.
5. The life saving system for swimming place of claim 2, wherein the monitoring device comprises a second transducer, a processor module, a wireless transmission module and a second power supply module, the second transducer is connected with the processor module, the second transducer receives the distress signal sent by the first transducer, converts the distress signal into an electric signal and sends the electric signal to the processor module, the processor module is connected with the wireless transmission module, the processor module performs wireless transmission through the wireless transmission module after de-noising and amplifying the electric signal, and the second power supply module is used for supplying power to the monitoring device.
6. The life saving system for a swimming place of claim 5, wherein the background terminal comprises:
the wireless receiving module is used for receiving the processed distress signal sent by the wireless transmission module;
the audible and visual alarm is used for sending audible and visual alarm information;
the main control module is respectively connected with the wireless receiving module and the audible and visual alarm, and the main control module controls the audible and visual alarm to work according to the processed distress signal.
7. A life saving system for a swimming place according to any of claims 1-6, wherein the listening device is plural.
8. The life saving system for swimming place according to claim 7, wherein the background terminal comprises a display, the display is connected with the main control module, wherein the main control module further obtains the distance between the swimmer in drowning state and each of the monitoring devices according to the distress signal sent by each of the monitoring devices by using a positioning algorithm to determine the position of the swimmer in drowning state, and controls the display to display the position of the swimmer in drowning state.
9. The life saving system for swimming pools of claim 1, wherein the background terminal and the listening device communicate wirelessly through WIFI, 4G network, or 5G network.
10. The life-saving system for swimming place according to claim 1, wherein the distress signal is a Chirp signal with a center frequency less than or equal to 40kHZ, the Chirp signal has a structure comprising a wakeup frequency point, an LFM signal and a data code, wherein the data code records the time and the ID number of local transmission, the wakeup frequency F1 corresponding to the wakeup frequency point is used for system handshake, and the LFM signal is used for refining synchronization and ranging.
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| CN109436244A (en) * | 2018-11-14 | 2019-03-08 | 厦门大学 | Life saving system for Swimming pool |
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| CN109436244A (en) * | 2018-11-14 | 2019-03-08 | 厦门大学 | Life saving system for Swimming pool |
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