JPH0755927A - System and method for detecting position of traveling object - Google Patents

Abstract

PURPOSE:To provide a system for detecting positions of traveling objects which can be constructed into the system at a low cost by enabling the system to easily cope with a traveling object both outdoors and indoors, to easily and accurately detect the position of the object, to easily elongate its position detecting distance against the traveling object, and to be easily installed and the position detecting method of the system. CONSTITUTION:A system for detecting positions of traveling objects which is constituted in such a way that the ID tag reading device 3 of a mobile state 7 mounted on a traveling object reads an ID transmitted from an ID tag 9 and indicating positional information and transmits the received ID to a control state 8 through radio equipment 4 and the ID transmitted from the station 7 is received by means of the radio equipment of the station 8 and displayed on a display device as positional information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting system for a moving body for detecting the position of the moving body, and more particularly, the position of the moving body can be easily and accurately detected and the system can be constructed at low cost. The present invention relates to a detection system and its position detection method.

[0002]

2. Description of the Related Art A conventional moving body position detecting system will be described with reference to FIGS. FIG. 6 is a schematic diagram of a conventional moving body position detecting system using infrared rays or ultrasonic waves, FIG. 7 is a schematic diagram of a conventional moving body position detecting system using a sensor, and FIG. FIG. 1 is a schematic diagram of a conventional position detection system for a mobile body using guided radio.

As shown in FIG. 6, a first conventional position detecting system for a moving body includes a train 1, which is a moving body, and a train 1.
Is composed of a rail 2 that moves, a display device 6 that displays the position of the train 1, and a distance measuring device 61 that measures the distance from the time when infrared rays or ultrasonic waves are emitted and returned.

In the position detecting method in the conventional position detecting system for a moving body using infrared rays or ultrasonic waves shown in FIG. 6, the distance measuring device 61 emits infrared rays or ultrasonic waves to the train 1 to make infrared rays or ultrasonic waves. The position of the train 1 is detected by calculating the distance from the time it takes for the vehicle to be reflected and returned, and the position of the train 1 is displayed on the display device 6.

Further, as shown in FIG. 7, the second conventional position detecting system for a moving body is a contact type or non-contact type which detects the position of the train 1, the rail 2, the display device 6, and the train 1. A mold sensor 72 and a controller 71 that monitors the state of the sensor 72.

In the position detecting method in the position detecting system for a moving body using the conventional sensor shown in FIG. 7, a train 1 moves on a rail 2 and crosses a sensor 72 installed near the rail 2. The position information of the train 1 is displayed on the display device 6 by transmitting position information to the controller 71 connected to the sensor 72 by wire.

Further, in the third conventional position detecting system for a moving body, as shown in FIG. 8, the train 1, the rail 2, the display device 6 and the induction radio cause an electric current to flow so that the train 1 crosses. A radio wave is output to a guide wire 81 of a position detection induction radio whose phase changes at, a guide wire 82 of a data transmission guide radio through which a radio wave for the guide radio flows, and a guide wire 82 of a data transmission induction radio, Guide wire 81 for position detection inductive radio
And a controller 83 that detects the position change of the train 1 by detecting the phase change.

Induction wireless means 100 k to 250 in the long wave band.
This is a communication system in which a signal current flowing in the induction wire 81 of the position detection induction radio is exchanged by electromagnetic induction coupling by causing a radio wave of kHz to flow in the induction wire 82 of the data transmission induction radio. Here, the position of the train 1 is detected by utilizing the fact that when the guide wire 82 of the guide radio for data transmission and the guide wire 81 of the position detection guide radio intersect each other, the phase changes at the intersected position. It is a thing.

In the position detecting method in the conventional position detecting system for a moving body using the guide wireless shown in FIG. 8, the guide wire 81 of the position detecting guide wireless and the data transmitting guide wireless are provided beside the rail 2. The guide wire 82 is laid. Controller 8
3, when a radio wave is passed through the guide wire 82 of the guide radio for data transmission, the guide wire 8 of the guide radio for position detection is generated by the guide radio
A signal current flows through the controller 1 and is transmitted to the controller 83.

Then, when the train 1 moves on the rail 2, the guide wire 81 of the position detection guide radio and the guide wire 82 of the data transmission guide radio cross each other, and the phase at that position is reached. Changes. The change in the phase is transmitted from the guide wire 81 of the position detection guide radio to the controller 83,
The position of the train 1 is displayed on the display device 6.

[0011]

However, in the first conventional position detecting system and the position detecting method thereof shown in FIG. 6, the distance is measured by infrared rays or ultrasonic waves. Since it must be a straight line and the distance that infrared rays and ultrasonic waves can reach is limited, it can only detect the position of a very short distance, and the measurement error is large, and infrared rays cannot be used outdoors during the daytime. There was a point.

Further, in the second conventional position detecting system and the position detecting method thereof shown in FIG. 7, all the sensors 72 and the controller 71 are connected by signal lines in order to transfer signals. Therefore, there is a problem in that the work of laying the signal line becomes large-scale and the construction cost becomes high.

Further, in the third conventional position detecting system and its position detecting method of FIG. 8 mentioned above, since the guide wire of the guide radio is laid, the laying work becomes large and the equipment and the construction cost are considerably high. Also, there is a problem that it is difficult to cope with the extension of the distance.

The present invention has been made in view of the above circumstances, and can be used both outdoors and indoors, can easily and accurately detect the position, and can extend the distance by extending the position detection distance of the moving body. It is another object of the present invention to provide a position detection system for a moving body and a position detection method therefor, which can simplify installation work and construct a system at low cost.

[0015]

The invention according to claim 1 for solving the problems of the above-mentioned conventional example is an ID for transmitting an ID indicating position information in a position detecting system for a moving body.
A management station including a tag, a display device that displays the ID as position information, and a mobile station that is attached to a mobile body and that receives the ID transmitted from the ID tag and transmits the ID to the management station. Is characterized by.

The invention according to claim 2 for solving the problems of the above-mentioned conventional example is the position detecting method of the position detecting system for a moving body according to claim 1, wherein
The ID tags are previously installed at intervals, and the mobile station attached to the mobile body reads the ID transmitted by the ID tag and transmits it to the management station, and the management station stores the ID. It is characterized in that it is displayed on the display device as position information of the moving body.

[0017]

According to the invention described in claim 1, the mobile station attached to the mobile receives the ID indicating the position information transmitted from the ID tag and transmits it to the management station, and the management station transmits the ID to the position information. As the position detection system of the moving body displayed on the display device as such, an ID tag is placed on the path of the moving body, and the mobile station reads the ID while the moving body moves to inform the management station of the position information. Therefore, it is possible to easily and accurately detect the position of the moving body, and to implement this system, an ID tag can be installed, so the system can be constructed at low cost, and the system can be expanded by adding an ID tag. Can be done easily.

According to the second aspect of the present invention, the ID tags are installed in advance at the moving place of the moving body at intervals.
The position detecting method for a position detecting system for a mobile body according to claim 1, wherein the mobile station reads the ID from the ID tag and transmits it to the management station, and the management station displays the ID as position information of the mobile body on the display device. Therefore, since the mobile station reads the ID and notifies the management station of the position information while the mobile unit is moving, it is possible to easily and accurately detect the position of the mobile unit, and to realize the present system. Since it is sufficient to install an ID tag, the system can be constructed at low cost, and the system can be easily expanded by adding an ID tag.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram of a position detecting system for a moving body according to an embodiment of the present invention. As shown in FIG. 1, the position detecting system for a moving body of the present embodiment has an ID tag 9 in which an ID indicating position information is stored, and an ID tag 9
The ID tag reading device 3 that receives and recognizes the ID transmitted from the mobile station 7 and the mobile station 7 having the wireless device 4 that transmits the read ID to the management room 8 attached to the moving body, and the ID transmitted from the mobile station 7. It comprises a wireless device 5 for receiving and a management station 8 having a display device 6 for displaying the received ID as position information.

Next, a specific configuration of each part in the position detecting system for a moving body of this embodiment will be described. The mobile station 7 always sends the I request to the ID request receiving unit 12 of the ID tag 9.
The ID request transmission unit 11 that transmits the D request signal and the ID that receives the ID transmitted from the ID transmission unit 13 of the ID tag 9
From the ID tag reader 3 including the receiver 14 and the ID reader 15 that reads and recognizes the received ID and transmits it to the wireless transmitter 16 of the wireless device 4, and the ID reader 15 of the ID tag reader 3. Radio 5 of management station 8 that receives the ID
And a wireless device 4 including a wireless transmission unit 16 for transmitting an ID to a wireless reception unit 17 therein.

The management station 8 receives the ID transmitted from the wireless transmission section 16 in the wireless station 4 of the mobile station 7 and transmits it to the display section 18 by the wireless receiving section 17 and the mobile station 7.
And a display device 6 including a display unit 18 for displaying the current position information of.

The ID tag 9 includes an ID request receiver 12 for receiving an ID request signal from an ID request transmitter 11 in the ID tag reader 3 of the mobile station 7, and an ID tag reader 3 of the mobile station 7 for ID. And an ID transmitting unit 13 that transmits the ID to the ID receiving unit 14.

An outline of the operation of the position detecting system for a moving body according to this embodiment will be described. The ID tag reading device 3 of the mobile station 7 attached to the moving body always transmits the ID request signal from the ID request transmission unit 11. ID
When the ID tag 9 exists within the readable distance of the tag reading device 3, the ID tag 9 is detected by the ID request receiving unit 12.
The request signal is received and the ID is transmitted from the ID transmission unit 13. The mobile station 7 includes the ID tag reader 3 and the ID receiver 1
4 receives the ID, the ID reading unit 15 recognizes the ID,
The ID is transmitted to the wireless transmission unit 16 of the wireless device 4, and the ID is transmitted from the wireless transmission unit 16. When the wireless reception unit 17 of the wireless device 5 receives the ID, the management station 8 displays the display unit 1 of the display device 6.
The ID is transmitted to 8, and the ID is displayed as the current position information of the mobile station 7.

Next, a schematic diagram of the ID tag 9 will be described with reference to FIG. FIG. 2 is a schematic diagram of the ID tag 9 of this embodiment. As shown in FIG. 2, the ID tag 9 includes an antenna 21 that receives an ID request signal or transmits an ID, and an IC 22 that stores an ID indicating position information and controls the ID tag 9.
And a hard glass tube 23 that protects the antenna 21 and the IC 22. The shape of the ID tag 9 may be a card type, a seal type or the like other than the shape shown in FIG. The ID tag is also called a transponder.

Next, the relationship between the ID tag and the ID tag reader will be described with reference to FIG. FIG. 3 is a circuit diagram of the communication system of the ID tag and the ID tag reader of this embodiment. In the ID tag reading device 3, the signal from the transmission / reception decoding unit is transmitted at the time of transmission, and the reception signal is coded and received by the transmission / reception decoding unit at the time of reception. Upon receiving the signal from the power supply, the power supply operates, and the power supply also operates the control unit and the signal generation unit, and transmits the signal from the signal generation unit to the ID tag reader 3 under the control of the control unit. Therefore,
When the ID tag reader 3 is in the transmitting state, it plays the role of the ID request transmitting unit 11, and when it is in the receiving state, it plays the role of the ID receiving unit 14, and the ID tag 9 is in the receiving state.
It plays the role of the D request receiving unit 12, and plays the role of the ID transmitting unit 13 in the transmitting state.

Next, the communication procedure of the ID tag C will be described. The communication procedure of the ID tag 9 is that the ID tag reader 3 of the mobile station 7 sends (transmits) an ID request signal to the ID tag 9 to request the ID tag 9 to send a signal. When the ID tag 9 receives the ID request signal, the ID tag 9 transmits an information transmission enable signal informing the ID tag reader 3 that information can be transmitted, and then transmits the ID. The ID tag reader 3 receives the ID when receiving the information transmission enable signal.
Receiving is possible and the ID from the ID tag 9 is surely received. Then, again, the ID tag reading device 3 of the mobile station 7 transmits the ID request signal to the ID tag 9.

A system for detecting position information using a moving body as a train will be described with reference to FIG. FIG. 4 is a schematic diagram of a position detection system in which the moving body of this embodiment is a train. As shown in FIG. 4, a position detection system using a moving body as a train includes a train 1 as a moving body, a rail 2 on which the train 1 moves, an ID tag 9 in which an ID indicating position information is stored in advance, ID to receive and recognize the ID on the moving train 1
The mobile station 7 includes a tag reader 3 and a radio 4 for transmitting an ID, and a management station 8 including a radio 5 for receiving an ID and a display 6 for displaying position information.

An outline of the operation of the position detecting system using the moving body as a train of this embodiment will be described. Mobile station 7
Next to the rail 2 on which the
The ID tags 9 in which are stored are installed at intervals.
While the train 1 is traveling on the rail 2, the ID of the ID tag 9 is constantly read by the ID tag reader 3 mounted on the train 1. Then, the wireless device 4 of the mobile station 7 mounted on the train 1 transmits the ID to the wireless device 5 of the management station 8, and the position information of the train 1 is displayed on the display device 6. In addition, as long as the mobile body moves to a predetermined place, the mobile station 7 can be carried by a human being or an animal. Furthermore, the position detection system can be used for cars, bicycles, motorcycles, It is also effective for position detection in trains, monorails, trains, etc.

Next, FIG. 5 shows an example of communication of the position detection system of this embodiment. FIG. 5 is a time chart diagram showing a communication example of the position detection system for a mobile body according to the present embodiment. The mobile station 7 always sends an ID request signal to the ID tag 9. When the ID tag 9 receives the ID request signal,
An information transmission enable signal is transmitted, and then ID (001) is transmitted. The mobile station 7 enters the ID receivable state after receiving the information transmission enable signal, receives the ID (001),
It is transmitted to the management station 8. When receiving the ID (001), the management station 8 displays 001 as the current position information of the mobile station 7.

Again, the mobile station 7 responds to the ID tag 9 with the I
D Send a request signal. The ID request signal is transmitted until the ID tag 9 is present within a distance readable by the mobile station 7, and when the ID tag 9 receives the ID request signal, the ID tag 9 transmits an information transmission enable signal, and then the ID (002) is transmitted, and the position information 002 is displayed on the management station 8 similarly to 001.

According to the position detecting system and the position detecting method of the moving body of this embodiment, the ID tags 9 in which the IDs indicating the position information are previously stored are installed at intervals at the moving place, and the moving object is moved. The ID tag reading device 3 of the mobile station 7 attached to the body always moves while reading the ID of the ID tag 9, and the wireless device 4 of the mobile station 7 to the wireless device 5 of the management station 8 moves.
Since the ID information is transmitted to the display device 6 to display the position information of the mobile station 7 on the display device 6, the position detection distance of the mobile station 7 can be lengthened, and the system installation work can be facilitated. After the system is installed, the system can be easily expanded, the system can be constructed at low cost, it is not easily affected by the weather, it can be used outdoors and indoors, and maintenance work can be facilitated.

[0032]

According to the invention described in claim 1, the mobile station attached to the mobile unit receives the ID indicating the position information transmitted from the ID tag, transmits the ID to the management station, and the management station transmits the ID.
Is used as a position detection system for a moving body that displays on the display device as position information, an ID tag is placed on the path of the moving body, and while the moving body is moving, the mobile station reads the ID and the position information is sent to the management station. Since it notifies the user, the position of the moving body can be detected easily and accurately, and an ID tag can be installed to realize this system, so the system can be constructed at low cost, and an additional ID tag can be added. This has the effect of facilitating system expansion.

According to the second aspect of the present invention, the ID tags are installed in advance at the moving place of the moving body at intervals.
The position detecting method for a position detecting system for a mobile body according to claim 1, wherein the mobile station reads the ID from the ID tag and transmits it to the management station, and the management station displays the ID as position information of the mobile body on the display device. Therefore, since the mobile station reads the ID and notifies the management station of the position information while the mobile unit is moving, it is possible to easily and accurately detect the position of the mobile unit, and to realize the present system. Since it is sufficient to install an ID tag, it is possible to construct a system at low cost, and it is possible to easily expand the system by adding an ID tag.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a position detection system for a moving body according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an ID tag of this embodiment.

FIG. 3 is a circuit diagram of the communication system of the ID tag and the ID tag reader of this embodiment.

FIG. 4 is a schematic diagram of a position detection system in which a moving body of this embodiment is a train.

FIG. 5 is a time chart diagram showing a communication example of the position detection system for a mobile body according to the present embodiment.

FIG. 6 is a schematic diagram of a conventional position detection system for a moving body using infrared rays or ultrasonic waves.

FIG. 7 is a schematic diagram of a position detection system for a moving body using a conventional sensor.

FIG. 8 is a schematic diagram of a conventional position detection system for a moving body using guided radio.

[Explanation of symbols]

1 ... Train, 2 ... Rail, 3 ... ID tag reader,
4 ... Radio of mobile station 7, 5 ... Radio of management station 8,
6 ... Display device, 7 ... Mobile station, 8 ... Management station, 9 ... ID
Tag, 11 ... ID request transmitter, 12 ... ID request receiver, 13 ... ID transmitter, 14 ... ID receiver, 15
... ID reading unit, 16 ... Wireless transmitting unit, 17 ... Wireless receiving unit, 18 ... Display unit, 21 ... Antenna, 22 ... I
C, 23 ... Hard glass tube, 61 ... Infrared or ultrasonic distance measuring device, 71 ... Controller, 72
... sensor, 81 ... guide wire of position detection guide radio, 82
... guide wire of induction radio for data transmission, 83 ... controller

Claims (2)

[Claims] 1. An ID tag that transmits an ID indicating position information, a management station that includes a display device that displays the ID as position information, and an ID that is attached to a moving body and receives the ID transmitted from the ID tag. And a mobile station for transmitting to the management station. 2. The management station by reading the ID transmitted from the ID tag by a mobile station attached to the mobile body, by previously installing the ID tags at a moving place of the mobile body at intervals. The position detecting method of the position detecting system for a mobile body according to claim 1, wherein the ID is transmitted to the management station and the ID is displayed on the display device as the position information of the mobile body.