JPH11149599A - Gps device displaying traveling object at base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit a position signal detected by a mobile GPS device to a base station by using radio equipment that is mounted on a traveling object together, to reduce cost and to display the position of the traveling object on a monitor map at the base station. SOLUTION: This GPS device is provided with a mobile GPS device 9 which is mounted on a traveling object, receives radio waves of a GPS satellite and detects its position, radio equipment 11 that transmits a position signal detected by the device 9 by radio and a base station GPS device which receives the transmitted position signal and shows the position of the traveling object on a monitor map. Here, the device 9 is connected to the equipment 11 through an adapter 21 that is connected to a microphone terminal 11A of the equipment 11 which is attached to the traveling object. The adapter 21 is provided with a microphone terminal 21A and inputs both a position signal that is operated from radio waves from the GPS satellite a voice signal inputted from a microphone 22 to the equipment 11 and the equipment 11 transmits both the position signal and the voice signal to the base station by radio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle such as a taxi or a delivery car, or a moving object such as an elderly person or a salesman who moves to various places. It relates to a GPS device to be displayed.

[0002]

2. Description of the Related Art The present inventor has already developed a device for identifying a traveling zone of a moving object such as a plurality of taxis (Japanese Patent Publication No. 7-105000). As shown in FIG. 1, this device divides an area into a plurality of zones, and a zone receiver 2, a zone transmitter 1, and a detection circuit 3 are installed in each zone. A moving object receiver 5 and a moving object transmitter 4 are mounted on a taxi T which is a moving object. Further, the base station is provided with a base receiver 7 and a base transmitter 6.

[0003] For example, when searching for a taxi T in the A zone, this device transmits a calling radio wave modulated by a tone signal for calling the A zone from the base transmitter 6. The paging radio wave is received by all of the zone receivers A, B, and C.
The zone A detection circuit 3 confirms that its zone has been called, and transmits a zone radio wave from the zone transmitter 1. The detection circuits 3 of the B and C zones other than the A zone confirm that their zones are not called, and do not put the zone transmitter 1 in the transmission state. Therefore, the zone radio wave is transmitted only to the A zone. This zone radio wave is received by the moving object receiver 5 of the taxi traveling in the A zone, and the moving object transmitter 4 of the taxi T transmits the information radio wave. A taxi traveling in a zone other than the A zone cannot receive the zone radio wave from the zone transmitter 1 in the A zone and does not transmit the information radio wave. Therefore, the base receiver 7 can detect all taxis traveling in the called A zone by receiving all transmitted information radio waves and detecting the car number tone signal. Even if the base receiver 7 receives a plurality of information radio waves, the respective car number tone signals can be detected and displayed simultaneously.

[0004]

The apparatus shown in this figure can detect in which zone a plurality of moving objects are located. However, the position of the moving object in the zone cannot be accurately detected. In order to more accurately detect the position of the moving object, it is necessary to divide the zone into smaller zones. However,
When the zone is divided into small zones, a large number of zone receivers and zone transmitters are required, which increases equipment costs.

[0005] This disadvantage can be solved by a method of detecting the position of a moving object by receiving radio waves from a GPS satellite. This device attaches a mobile GPS device to a moving object, detects the position of the moving object, and wirelessly transmits a detected position signal to a base station. The base station calculates the position of the moving object from the transmitted position signal and displays it on the monitor map.

This GPS device has a feature that the positions of a plurality of moving objects can be displayed on a monitor map. However, this device requires that a moving object be equipped with both a mobile GPS device for measuring a position and a radio device for transmitting a position signal detected by the mobile GPS device to a base.

[0007] Moving objects such as taxis and delivery vehicles are almost always equipped with radio equipment to communicate with the base. In addition, a moving object such as a person who does not wear a wireless device can be connected to a base using a commercially available wireless device. The radio used for this purpose is mobile GP
It can be used together with a wireless device that transmits the position signal detected by the S device. However, the radios used to communicate with the base are designed to transmit voice, so mobile G
In order to transmit the position signal detected by the PS device, it is necessary to change the position signal to a newly designed wireless device. In the case of a large number of moving objects, replacing all radios with new ones would significantly increase the cost of the entire installation. Further, since a dedicated radio is designed, the radio itself becomes expensive.

Furthermore, a radio device designed to transmit a position signal of a mobile GPS device has a disadvantage that a microphone cannot be used if a circuit for transmitting the position signal of the mobile GPS device breaks down. Further, when the wireless device to be repaired is detached from the moving object, a spare wireless device needs to be attached to the moving object.

The present invention has been developed with the object of solving such a drawback. An important object of the present invention is to provide a mobile communication system using a general-purpose wireless device mounted on a moving object.
By transmitting the position signal detected by the PS device to the base, a GPS device that displays the positions of the moving objects at the base station, which can display the positions of a plurality of moving objects on the monitor map of the base while reducing the overall cost. To provide.

Another important object of the present invention is to provide a moving G
If the circuit that transmits the position signal of the PS device breaks down, remove the adapter from the radio, connect the microphone directly to the microphone terminal of the radio, and use it for voice communication, making maintenance and repair simple and easy. It is an object of the present invention to provide a GPS device that displays a position of a moving object that can be easily and efficiently displayed on a base station.

[0011]

A GPS device for displaying the position of a moving object on a base station according to the present invention is mounted on a moving object 8 such as a vehicle or a person, and receives a radio wave of a GPS satellite 13 to move the moving object. A mobile GPS device 9 for detecting the position of the mobile object 8, a wireless device 11 for wirelessly transmitting the position signal detected by the mobile GPS device 9, and a position signal transmitted by the wireless device 11 to receive the position signal of the mobile object 8. And a base GPS device 10 for displaying a position on the monitor map 12.

The mobile GPS device 9 is connected to the wireless device 11 via an adapter 21 connected to the microphone terminal 11A of the wireless device 11 mounted on the moving object 8. The adapter 21 has a microphone terminal 21A, and the speaker microphone 22 is connected to the microphone terminal 21A of the adapter 21.
Are connected. The adapter 21 inputs both the position signal calculated from the radio wave of the GPS satellite 13 and the audio signal input from the speaker microphone 22 connected to the microphone terminal 21A to the radio 11, and the radio 11 It is configured to wirelessly transmit both signals and voice signals to a base station.

The GPS device having this structure can be used without changing the radio device 11 mounted on the moving object 8 such as a taxi or changing the radio device 11 to a newly designed radio device. 11 combined with mobile GPS
The position signal detected by the device 9 is transmitted to the base. The wireless device 11 attached to the moving object 8 includes a speaker microphone 22
And a microphone terminal 11A for connecting the The speaker microphone 22 connected to the microphone terminal 11A is disconnected, an adapter 21 is connected thereto, and the speaker microphone 22 is connected to the microphone terminal 21A of the adapter 21.
The speaker microphone 22 is connected to the wireless device 11 via the adapter 21. The position signal detected by the mobile GPS device 9 is input to the microphone terminal 11A of the wireless device 11 via the adapter 21. Therefore, the GPS device of the present invention can transmit a position signal from the moving object 8 to the base using the wireless device 11 without modifying the wireless device 11 attached to the moving object 8.

This is very important in a GPS device that displays the positions of many moving objects 8 on a base station. This is because the cost of designing a dedicated radio 11 and replacing the radios 11 of all the moving objects 8 with new ones becomes extremely expensive. Further, since the wireless device 11 also needs to be designed exclusively, the design of the wireless device 11 becomes difficult, and the wireless device 11 itself becomes expensive.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below illustrate a GPS device for embodying the technical idea of the present invention, and the present invention does not specify the GPS device as follows.

Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

The GPS device shown in FIG. 2 for displaying the positions of a plurality of moving objects on a base station includes a mobile GPS device 9 mounted on a moving object 8 and a base GPS device 1 installed on a base.
0, a radio device 11 for transmitting a position signal from the mobile GPS device 9 to the base GPS device 10, and an adapter 21 for connecting the mobile GPS device 9 to the radio device 11 of the moving object 8.

The moving object 8 is a vehicle such as a taxi or a delivery car, or a moving person such as an elderly person, a salesman, or a worker. There are a plurality of moving objects 8, and a moving GPS device 9 is attached to each moving object 8. Base monitor map 1
2 indicates the positions of the plurality of moving objects 8.

The mobile GPS device 9 includes a plurality of GPS satellites 1
3 and calculates the reception signal of each GPS satellite 13 and outputs the position of the moving object 8 as a position signal. The position signal is output, for example, as a digital signal composed of latitude and longitude. This position signal is transmitted to the adapter 21
Is connected to the wireless device 11 and transmitted from the wireless device 11 to the base. When the moving object is a taxi or a delivery vehicle, the position signal is transmitted to the base using a radio device mounted on the vehicle.

The position signal transmitted from the mobile GPS device 9 to the base includes a position error due to the jamming signal of the GPS satellite 13. The mobile GPS device 9 transmits a position signal without correcting the error to the base. Just move G
The PS device can also transmit the position signal in which the error of the jamming signal has been corrected to the base. In order for the mobile GPS device to correct the error of the jamming signal, the D-GPS method is adopted. In the D-GPS method, a correction signal transmission base whose position is accurately known receives radio waves of GPS satellites,
The position calculated by the GPS satellite signal is compared with the fixed position of the transmitting base to determine a position correction error, and the position is corrected and transmitted to the moving object using the FM multiplex radio wave. The moving object receives the FM multiplex radio wave, corrects the position detected by the GPS device with a position correction error, and detects an accurate position.

The position signal includes a moving object signal specifying the moving object 8. The base GPS device 10 specifies the moving object 8 by the moving object signal, and displays the position of the moving object 8 specified by the position signal on the monitor map 12. However, the position signal does not necessarily need to include the moving object signal. For example, by calling a specific moving object from the base and transmitting a position signal from the called moving object,
This is because a moving object can be specified. To call a specific moving object 8 from the base, for example, the moving object 8 is called by a calling signal modulated by a digital signal. The moving object 8 can be specified by a digital signal that modulates the calling signal. The ringing signal may be a tone signal instead of a digital signal.

The adapter 21 is connected to a microphone terminal 11A of the wireless device 11, as shown in FIG. The adapter 21 has a microphone terminal 21A to which the microphone jack 22A of the microphone 22 pulled out from the microphone terminal 11A of the wireless device 11 is inserted and connected. The microphone 22 is a microphone only or a speaker microphone. The microphone terminal for connecting the speaker microphone has a terminal connected to the microphone and a terminal connected to the speaker. The microphone 22 is connected to the wireless device 11 via the adapter 21 without directly connecting to the wireless device 11. The adapter 21 switches both the position signal calculated from the GPS satellite radio wave and the sound signal input from the microphone 22 and inputs the signal to the wireless device 11. The wireless device 11 converts both the position signal and the sound signal. Wireless transmission to the base station.

The adapter 21 includes a changeover switch 23 and a standby switch 24, as shown in the circuit diagram of FIG.
, A press switch 25, and a control circuit 26 for controlling the changeover switch 23 and the standby switch 24. The press switch 25 is built in the microphone.

The changeover switch 23 is connected between the output side and the input side. The changeover switch 23 has the common contact side connected to the microphone terminal 11A of the wireless device 11, the normally closed side connected to the microphone terminal 21A of the adapter 21, and the normally open side connected to the output side of the mobile GPS device 9. The changeover switch 23 is controlled by the control circuit 26 to connect the output side to one of a normally closed side and a normally open side. Normally, the normally closed side is connected to the output side. The changeover switch 23 outputs the position signal to the radio 11
Connect the normally open side to the output side only when outputting to.

The standby switch 24 is a switch for controlling the wireless device 11 to be in a transmission state. The standby switch 24 is connected to the wireless device 11. The radio device 11 has a circuit configuration for operating a transmitter and transmitting audio input from the microphone 22 when a press switch 25 provided on the microphone 22 connected to the microphone terminal 21A is pressed. I have. Further, the transmitter is operated when the mobile GPS device transmits the position signal. The standby switch 24 built in the adapter 21 is a switch for controlling the wireless device 11 to be in a transmission state. When this switch is on, the wireless device 11 is controlled to be in a transmission state. When the standby switch 24 is off, the wireless device 11 is in a receiving state.

The control circuit 26 controls the changeover switch 23 and the standby switch 24 based on the transmission signal output from the mobile GPS device 9 and the transmission signal input from the wireless device. In a normal state, the control circuit 26 connects the normally closed side of the changeover switch 23 to the output side, and turns off the standby switch 24. Mobile GPS
When a transmission signal is input from the device 9 or the wireless device and the position signal is transmitted to the base, the control circuit 26 connects the normally open side of the changeover switch 23 to the output side, and switches the standby switch 24 on. In this state, the position signal output from the mobile GPS device 9 is input to the wireless device 11 via the changeover switch 23 of the adapter 21, and the wireless device 11 is controlled to the transmission state, and receives the input position signal. Send to base.

When the mobile GPS device 9 is mounted on a moving object such as a taxi or a delivery vehicle, a transmission signal is output when the speed of the moving object 8 becomes faster than a set speed, and the moving object is output. When the vehicle is a taxi, a transmission signal is output when the state of the empty vehicle and the actual vehicle has changed or under other specified conditions. And the control circuit 26 turns on the standby switch 24 to put the wireless device 11 in the transmission state. The radio device 11 inputs a transmission signal to the control circuit 26 when called from the base. The control circuit 26 to which the transmission signal has been input turns on the standby switch 24 and transmits the position signal with the wireless device 11.

After transmitting the position signal to the base, the control circuit 26 connects the normally closed side of the changeover switch 23 to the output side, and switches the standby switch 24 off. The time during which the control circuit 26 outputs the transmission signal can be set by a timer. However, when a position signal is transmitted from a plurality of moving objects to the base at the same time, the transmitted position signal may not be received by the base. In particular, FM radio waves used for most wireless devices have a characteristic that strong radio waves are preferentially received and weak radio waves cannot be received. Therefore, only the position signal from the wireless device transmitting the strong radio wave may be received by the base, and the position signal of the weak radio wave transmitted at the same time may not be received.

The device having this problem can be sufficiently used because the next position signal transmitted one after another from the moving object can be received at the base. In order to reliably transmit the position signals transmitted from all the moving objects to the base, the mobile GPS device may receive the confirmation signal transmitted from the base and stop the transmission. To realize this method, when the base receives a position signal from a moving object, it transmits a confirmation signal to the moving object. The confirmation signal is received by the radio of the moving object. The received confirmation signal is input to the control circuit. The control circuit switches the standby switch from on to off in response to the input confirmation signal, and stops transmission. Along with the standby switch, the changeover switch also switches the output side to the normally closed side.

Further, the control circuit 26 switches the standby switch 24 in response to an input from the press switch 25. The press switch 25 is a switch mounted on the microphone 22 connected to the adapter 21. The control circuit 26 switches the standby switch 24 from off to on when the press switch 25 is pressed.

The control circuit 26 includes a press switch 25
When the user presses and speaks into the microphone 22, the sound input to the microphone 22 is transmitted to the wireless device 11 via the adapter 21.
To the microphone terminal 11A. When the press switch 25 is pressed, the standby switch 24 is turned on, and the wireless device 11 is in a transmission state. Therefore, the sound input to the microphone 22 is transmitted to the adapter 21.
Is input to the wireless device 11 and transmitted to the base.

As shown in FIG. 2, the base GPS device 10 stores an antenna 14 and a receiver 15 for receiving radio waves of a GPS satellite 13 and a base calculation position calculated from an output of the receiver 15 into a base station. And a calculation circuit 16 for calculating a position correction difference for correcting the calculated position to an accurate position as compared with the correct fixed position. The base GPS device 10
The radio wave of the GPS satellite 13 is always received, and the position of the base is calculated from the received signal. The position calculated from the radio wave of the GPS satellite 13 is deviated from the accurate base position by the jamming signal of the GPS satellite 13. The position calculated from the radio wave of the GPS satellite 13 is compared with the exact fixed position of the base.

The exact fixed position of the base can be calculated, for example, on a map issued by the Geospatial Information Authority of Japan. In addition, the GPS satellite 13
It can also be calculated from the average value of the position calculated from. The fixed position calculated from the average value of the GPS satellites 13 can be calculated more accurately by extending the averaging time.

The base station compares the position calculated from the radio wave of the GPS satellite 13 with the fixed position and calculates a position correction error. The device shown in FIG. 2 calculates a position correction error by a calculation circuit 16 that calculates a position from a radio wave of a GPS satellite 13. Although not shown, the position correction error can be calculated by a dedicated calculation circuit. The position signal transmitted from the mobile GPS device 9 is corrected using the calculated position correction error. The position signal corrected by the position correction error corrects the position shift caused by the jamming signal, and displays the moving object 8 on the monitor map 12 at an accurate position.

The radio 29 installed at the base receives both the position signal and the voice transmitted from the radio 11 of the moving object 8, and outputs the position signal to the arithmetic circuit 16 and the voice signal to the speaker 30. . Only one base station radio 29 is used in the entire system. For this reason, the base transceiver
It can be designed for exclusive use. However, the radio at the base,
Existing radios already installed at taxi base stations and the like can also be used together. To use an existing wireless device together, connect a base GPS device to the speaker terminal of the wireless device. The wireless device 29 outputs a digital signal or a position signal of an analog signal modulated by the digital signal to a speaker terminal, and inputs the position signal to the base GPS device 10. When a position signal of an analog signal modulated by a digital signal is input from the wireless device 29 to the base GPS device 10, the base GPS device 10 demodulates the input signal to obtain a digital signal position signal. From base station radio 29 to base G
The position signal input to the arithmetic circuit 16 of the PS device 10 is
The image is corrected on the position correction error and displayed on the monitor map 12.

When the output of the radio 29 is connected to the speaker 30 and the base GPS device 10, the position signal is reproduced from the speaker 30. The position signal reproduced from the speaker 30 is reproduced as noise different from voice. To prevent the position signal from being reproduced from the speaker 30,
An audio signal and a position signal are identified between the speaker 30 and the output of the radio 29, and the speaker 30 is connected to the radio 29.
The switching circuit 31 connected to the output is connected. Switching circuit 3
1 connects the output of the wireless device 29 to the speaker 30 only when an audio signal is output from the wireless device 29, and outputs the speaker 3 when the position signal is output from the wireless device 29.
0 is not connected to the output of the radio 29.

The monitor map 12 is displayed on a monitor such as a brown monitor or a liquid crystal monitor. The monitor is
Although not shown, the arithmetic circuit 16 is connected via a graphic circuit.
The monitor map 12 is displayed on a monitor by an output signal of the arithmetic circuit 16. The arithmetic circuit 16 includes a CPU
And a memory. The memory includes software for calculating the position of the base based on a signal received from the GPS satellite 13,
Software for calculating a position correction error by comparing an accurate fixed position of the base with the calculated position and software for correcting a position signal with the position correction error are stored, and the stored software controls the CPU.

Further, the apparatus shown in the figure is provided with a calling circuit 17 for calling the moving object 8. The calling circuit 17 calls a specific moving object 8. The exact position of the called moving object 8 is displayed on the monitor map 12. The calling circuit 17 includes an operation switch 18 and a transmitter 19 that transmits an output signal of the operation switch 18 and calls the wireless device 11 of the moving object 8.

Although not shown, the operation switch 18 includes a numeric keypad and a call switch. The numeric keypad specifies the moving object 8 to be called. For example, when the fifth moving object is called, a ten key is pressed and then a calling switch is pressed. Based on a signal from the operation switch 18, the transmitter 19 at the base transmits a radio wave modulated with a digital signal specifying the moving object 8. For example, the transmitter 19 transmits a radio wave modulated with a digital signal specifying the fifth moving object.

The radio waves transmitted from the transmitter 19 of the calling circuit 17 are received by the radios 11 mounted on all the moving objects 8. The wireless device 11 of the moving object 8 determines whether or not the wireless device 11 has been called by the demodulated digital signal. The wireless device 11 of the called moving object 8 outputs a transmission signal to the control circuit 26, and transmits the position signal calculated from the GPS satellite 13 by the wireless device 11. The wireless device 11 of the moving object 8 that has not been called does not transmit the position signal.

The position signal transmitted from the moving object 8 is received by the base receiver 20 of the base station radio 29. Base GP
The S device 10 corrects the received position signal with a position correction error, and displays the position of the called moving object 8 on the monitor map 12.
To be displayed.

The device of this structure is used for the called moving object 8.
Is corrected by the position correction error, and is accurately displayed on the monitor map 12. The mobile GPS device 9 attached to the mobile object 8 that has not been called can be provided at a constant cycle or
The position signal is transmitted to the base when a specific condition is satisfied, for example, when the moving speed becomes faster than the set speed, or in the case of a taxi, when the state of an actual vehicle and an empty vehicle changes. The base station that has received the position signal transmitted from the uncalled mobile object 8 displays the position signal on the monitor map 12 without correcting the position signal with a position correction error.

As described above, the position of the moving object 8 called from the base is corrected by the position correction error and the monitor map 12
The device for accurately displaying the position of the moving object 8 that has not been called up on the monitor map 12 without correcting the position correction error can be used without using a high-speed CPU for the arithmetic circuit 16 of the base. There is a feature that the position of the moving object 8 can be accurately displayed on the monitor map 12, and the positions of other moving objects 8 can be promptly displayed on the monitor map 12. However, the apparatus according to the present invention can accurately display the position of a moving object that has not been called by using a high-speed CPU as an arithmetic circuit with a position correction error on a monitor map.

A device that corrects a position signal transmitted from all moving objects with a position correction error and displays the corrected position signal on a monitor map does not necessarily need to provide a calling circuit in the base station.
This is because the positions of all moving objects can be accurately displayed on the monitor map.

Further, when the device of the present invention is used for displaying the positions of a plurality of taxis on a base station, the radio 11 mounted on the taxi, which is the moving object 8, is transmitted along with the position signal. A signal indicating whether the taxi is empty or actual and a signal indicating the traveling direction of the taxi are transmitted simultaneously. On the monitor map 12 of the base, in addition to the position of the taxi, the traveling direction indicating whether the taxi is empty or actual is displayed.

This device allows the user to easily search for an empty taxi in a specific area by looking at the monitor map 12. Further, a specific empty taxi is called by a calling circuit 17.
By calling the taxi, the position of the called taxi can be corrected with a position correction error and can be accurately displayed on the monitor map 12. The positions of taxis that are not called are also displayed on the monitor map 12, but the positions of these taxis are displayed on the monitor map 12 as positions slightly deviated from the correct positions by the jamming signal of the GPS satellites 13.

A device without a calling circuit corrects the positions of all moving objects with a position correction error, and accurately displays the positions on a monitor map together with whether the vehicle is empty or actual.

Even when the moving object is a vehicle or a person, a specific moving object can be called and the position of the called moving object can be accurately displayed on a map. Furthermore, in addition to the position of the moving object, a vehicle number for identifying the moving object, or a name or the like when the moving object is a person, can be displayed.

[0049]

The GPS device of the present invention for displaying the position of a moving object on a base station has the advantage that the overall cost can be reduced and the positions of a plurality of moving objects can be displayed on a monitor map of the base. This is because the GPS device of the present invention transmits the position signal detected by the mobile GPS device to the base using the wireless device mounted on the moving object. G of the present invention
The PS device connects the mobile GPS device to the wireless device via an adapter connected to a microphone terminal of the wireless device mounted on the moving object. This adapter has a microphone terminal, and inputs both an audio signal input from a microphone connected to the microphone terminal and a position signal calculated from radio waves of GPS satellites to the radio, and outputs the position signal and Both audio signals are wirelessly transmitted from the radio to the base station. The GPS device of this structure can use a radio device for voice communication already mounted together with a radio device mounted on a moving object without modifying or changing the radio device mounted on the moving object, and can use the base station to detect the position signal detected by the mobile GPS device. Can be sent to For this reason, a dedicated radio is designed to reduce the overall cost without replacing the radios of all moving objects with new and expensive ones, and to transmit a position signal from the moving object to the base, The feature that the positions of many moving objects can be displayed on the base station is realized.

Further, the GPS apparatus of the present invention
There is a feature that even if a circuit for transmitting the position signal of the S device breaks down, maintenance and repair can be performed simply, easily, and efficiently. This is because the GPS device of the present invention can be used for voice communication by removing the adapter from the wireless device and connecting a microphone directly to the microphone terminal of the wireless device. As described above, the GP according to the present invention can easily remove the adapter.
The S device can be used for voice communication without replacing the radio even if the mobile GPS device fails. In particular, an adapter or microphone connected to the microphone terminal is extremely easy to connect, and does not require specialized knowledge. Therefore, even if a failure occurs suddenly while using the GPS device, there is a feature that a person who does not have specialized knowledge can cope very easily and quickly. For this reason, each moving object does not need to be equipped with a spare radio, and since only a failed mobile GPS device can be removed, the mobile object also has a feature that can be easily repaired and inspected.

[Brief description of the drawings]

FIG. 1 is a schematic circuit diagram of a position detection apparatus for a moving object developed earlier by the present inventors.

FIG. 2 is a schematic circuit diagram of a GPS device for displaying a position of a moving object on a base station according to an embodiment of the present invention;

FIG. 3 is a circuit diagram of an adapter of the GPS device shown in FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 zone transmitter 2 zone receiver 3 detection circuit 4 moving object transmitter 5 moving object receiver 6 base transmitter 7 base receiver 8 moving object 9 mobile GPS device 10 base GPS device DESCRIPTION OF SYMBOLS 11 ... Radio apparatus 11A ... Microphone terminal 12 ... Monitor map 13 ... GPS satellite 14 ... Antenna 15 ... Receiver 16 ... Arithmetic circuit 17 ... Calling circuit 18 ... Operation switch 19 ... Transmitter 20 ... Base receiver 21 ... Adapter 21A ... Microphone Terminal 22: Microphone 22A: Microphone jack 23: Changeover switch 24: Standby switch 25: Press switch 26: Control circuit 29: Radio 30: Speaker 31: Switching circuit T: Taxi

Claims (1)

[Claims] 1. A GPS satellite mounted on a moving object (8)
(13) a mobile GPS device (9) that detects the position of the moving object (8) by receiving the radio wave, and a radio device (11) that wirelessly transmits a position signal detected by the mobile GPS device (9). And a base GPS device (10) for receiving a position signal transmitted by the wireless device (11) and displaying the position of the moving object (8) on the monitor map (12). 9) is a transceiver mounted on the moving object (8)
The moving object (8) is connected to the radio (11) via an adapter (21) connected to the microphone terminal (11A) of (11), and the adapter (21) has a microphone terminal (21A). The adapter (21) inputs both the position signal calculated from the radio wave of the GPS satellite (13) and the audio signal input from the microphone (22) to the radio (11), and the radio (11) A GPS device for displaying, on the base station, the positions of a plurality of moving objects, wherein the GPS device is configured to wirelessly transmit both the position signal and the voice signal to the base station.