JPH03282700A - Mobile station position monitoring system - Google Patents

Abstract

PURPOSE:To obtain an inexpensive system whose cost of equipment is low by measuring a position of a moving station with high accuracy by using a position measuring artificial satellite, and displaying its position on a map. CONSTITUTION:The position of a moving station 14 is measured by position measuring artificial satellites (GPS : Global Positioning System) 11 - 13, and to position measuring information obtained thereby, information of the moving station 14 itself which obtains it is added, and they are encoded, modulated and transmitted. Also, the transmitted signal is received, demodulated, and the position measuring information and the information of the moving station 14 itself are decoded, and superimposed on a map for displaying the area concerned, based on the obtained position measuring information and the position of the moving station 14 is displayed on the map. In such a way, an inexpensive system whose cost of equipment is low can be obtained.

Description

[Detailed Description of the Invention] [Field of Application of Industry-I-] This invention is suitable for managing multiple vehicles, transporting people, cargo, etc., patrolling/rolling police, security companies, vehicle placement, etc. This system is related to a mobile station position monitoring system that constantly monitors the situation at a base station and controls the operation of its wheels.The mobile station is not limited to vehicles, ships, etc. The position may be moved accordingly.

[Prior art] As this type of mobile station position monitoring system, A
VM (AuLomaLic Vehicle Mon
1Lor]ng) method is known. Here, a typical AVM method will be explained.

Figure 4 is a schematic configuration diagram of a conventional AVM distributed transmission system, Figure 5 is a schematic configuration diagram of a conventional AVM distributed reception system, and Figure 6 is a conventional AVM type half-white power type single mixer. Connection 1
There are 14 compositions.

In the distributed transmission method, which is one of the AVM methods, a large number of signposts 1-2 (2a to 2e) that constantly transmit position signals are installed in a distributed manner, and information from communication station 1 such as the user operation management center is transmitted to zone A. -Output to the service area of E. The mobile station 4 receives position signals from the nearest sign posts 2a to 2e, and in addition to the position signals of the service areas of the sign posts 2a to 2e, it also receives information such as recognition of its own mobile station (hereinafter referred to as , simply f I D (IclenL]
This is a technique for directly transmitting to the base station 3 with the addition of f1cation)j).

In addition, in the distributed reception method, in response to polling or simultaneous paging from the base station 3, the mobile station 4 within a predetermined service area transmits its own ID to the nearest sign post 2a to 2.
This is a technique in which the signals received by the sign posts 2a to 2e are transmitted to the communication station 1 by wire, with the ID of the own station added to the signal for each service area.

In the semi-automatic method, in response to polling or simultaneous paging from the base station 3, the mobile station 4 presses a push button for the region and transmits its own ID and a predetermined encoded region signal to the base station. 3, and the base station 3 transmits it to the communication station 1 by wire.

``Invention or problem to be solved 1 However, in the distributed transmission method described in -1-, the signpost 2a
A receiver for receiving radio waves from ~2e and a communication device for communicating with base station 3 are required, which increases the cost of the entire system.Also, since the service areas of Ximpos h2a~2e cannot overlap, the service There were blank areas between areas. Even in the distributed reception method described in L, a transmitter for transmitting radio waves to the sign posts 2a to 2e, a communication device for communication with the base station 3, and 4. -, sign post 2a
A wired circuit network is required between ~2e and the communication station 1, which increases the cost of the entire system.Also, since the service areas cannot overlap, a blank area occurs between the service areas.

These distributed transmission systems and distributed reception systems require two or more types of frequencies, and also require communication equipment compatible with the frequencies, which poses a problem in that the entire system becomes expensive. Furthermore, blank areas in the service area always occur, and eliminating them is logically a problem.

In addition, in the semi-automatic method described in -1-, segmentation of regions is difficult, and much of the information exchange relies on human operations, resulting in human errors such as region codes and human errors. The cause of this is people.

On the other hand, the technology published in the patent publication is JP-A-62-7
Specific methods of polling that embody the above technique are known in 230S''3'' Publication, Japanese Patent Application Laid-Open No. 63-6698-13, Japanese Patent Application Laid-Open No. 63-6700, etc. However, by polling, In order to collect the location information of all the mobile stations 4, a time corresponding to the number of mobile stations 4 is required.
Since this includes an error between distances of ~2e, the error between the current mobile station position and the mobile station position information obtained at communication station 3 may be about twice as large depending on the polling interval. .

Therefore, as a mobile station position monitoring system of this type, a method is desired in which there are no blank areas in the service area, the mobile station position is accurate, and the mobile station can be constantly monitored. In particular, the distributed transmission system and the distributed reception system require signposts 2a to 2e in public places, which increases equipment costs.Therefore, it has been desired to provide an inexpensive system with low equipment costs.

Therefore, an object of the present invention is to provide a mobile station position monitoring system that eliminates blank areas in mobile station detection, and that can accurately detect and display the position of a mobile station without requiring human labor, with a low capital investment. That is.

[Means for Solving the Problems] A mobile station position monitoring system according to the present invention includes:
a mobile station analyzer device measurement transmitter that converts and transmits positioning information obtained by measuring the position of a mobile station using a positioning artificial satellite and information about the mobile station itself that has been obtained, and receives the transmitted signal; Reducing the positioning information and information on the mobile station itself,
Based on the obtained positioning information, the mobile station is equipped with a reception display means for displaying the position of the mobile station on a map displaying the corresponding area.

[Function] In the mobile station position monitoring system of the present invention, the mobile station position is measured by the positioning artificial satellite by the mobile station position -111 constant transmitting means, and the positioning information obtained thereby is transmitted to the mobile station itself. information is added, encoded, and transmitted. The reception display means receives the transmitted signal, reproduces the positioning information and the information of the mobile station itself, and displays the corresponding area on a map-1 based on the obtained positioning information. Combine and display the mobile station position on the map.

[Embodiment] FIG. 1 is an overall configuration diagram showing an outline of a mobile station position monitor link system J, which is an embodiment of the present invention. FIG. 2 is a block diagram of a mobile station in a mobile station position monitoring system which is an embodiment of the present invention, and FIG. 3 is a block diagram of a command station in a mobile station position monitoring system which is an embodiment of the present invention. It is a diagram.

In the figure, the positioning artificial satellite (hereinafter simply referred to as
“G P S (Glol) al Positioni
ng System) j)11. ．． 12.1-
3 is an artificial satellite that outputs a frequency for positioning that was set by the United States, and the mobile station position is measured from the position of the artificial satellite.As is well known, in order to obtain positioning information, Three or more GPSII, 12.13 are used.

The mobile station 1-4 such as a vehicle in this embodiment is a communication means carried by a mobile object such as a wheel, and receives GPS II, 1.2°13 radio waves, and from the propagation time of the radio waves, each GPS11.12
．． 13 and the mobile station]-4. Each GPS II, 12.13 operates in a determined orbit around the earth, and each GPS II, 12 in the orbit 1-
．． The position of the mobile station 14 on Earth 1- is calculated from the position and distance of 13 and the position is specified, and the detection error is set to an accuracy within a range of 100 m depending on the inventor's experiments. I can do it. The mobile station 14 calculates its position using a known GPS receiver and typically transmits latitude and longitude information to the base station 15. The base station 15 displays the operating status of the mobile station 1-4 by superimposing the position of the mobile station 14 on a CRT or panel displaying a map, for example. Further, a command station 1-6 is provided to communicate with the base station 15 as necessary. Depending on the aspect, a plurality of base stations 15 and command stations 1-6 may be arranged.

Next, the configuration of the mobile station 14 of the mobile station position monitoring system according to the present embodiment shown in FIG. 2 will be explained.

In FIG. 2, antenna 21- is GPS II.

12.1.3 radio waves are received. The GPS receiver 22 is G
PSII, 12. ] This is a measurement receiver for obtaining position signals of latitude and longitude from radio waves of 3.

The latitude/longitude information modulator 23 converts the latitude and longitude signals output from the GPS receiver 22 into digital signals with a frequency suitable for wireless transmission, such as DTMF (Dual
Tone Mulli Frequency) signal. The ID information modulator 24 is a modulator for transmitting information about the mobile station 1-4 itself, for example, if the mobile station 1-4 is a vehicle, vehicle recognition information such as its car number. The adder 25 adds the latitude and longitude information output from the latitude/longitude information modulator 23 and the ID information output from the ID information modulator 24 to form a series of digital signals. A transceiver interface (I/F) 26 is an interface for inputting output signals of latitude and longitude information and ID information to a transceiver 27, which will be described later. The transceiver 27 is a normal mobile radio, and has a speaker 28 and a microphone 2.
9 sends and receives audio, latitude and longitude information, and ID of the destination.
The information is transmitted to the base station 15. Also, the transceiver 27
performs voice communication with the base station 15 through a speaker 28 and a microphone 29. Further, the communication antenna 30 is for propagating radio waves from the transceiver 27. And Con I
- The roller 31 sends out latitude and longitude information, ID information signals, or controls voice communication based on command signals from the base Ir1s.

Next, the configuration of the base station 15 of the mobile station position monitoring system according to the present embodiment shown in FIG. 3 will be explained.

In FIG. 3, an antenna 41 for communicating with the mobile station 14 is connected to a transceiver 42, similar to the mobile station 14 in FIG.
have. The output of the l/ranumber 42 is connected to a transceiver interface (I) upon receiving latitude and longitude information.
/F) 45, latitude/longitude/ID information demodulator 46 outputs latitude/longitude information and ID information as digital signals. The display controller 47 displays an ID code and/or ★ etc. on the screen of the display CRT 49 at a pre-specified position on the map-1-, in other words, at a latitude and longitude point. Note that the map selection circuit 4
Reference numeral 8 outputs and displays a map based on latitude and longitude information on the screen of the CRT 49 for display. Then, the controller 51 transmits information from the base station 15 to the specific mobile station 14.
ID generator 50 for transmitting latitude and longitude information to
and change the screen on the display CRT 49.

The mobile station device according to the embodiment of the present invention configured as described above The location monitoring system operates as follows.

Normally, the service area of the map selection circuit/18 is set by the controller 51 according to the communication capability of the mobile station 14, and a map of the entire service area is displayed on the screen of the display CRT 491-. A controller I/roller 51 drives an ID generator 50 to generate ID information for a simultaneous, polling, or specific mobile station, and transmits the signal to a transceiver interface (I/F) 45.
The transceiver 42 outputs the signal through the antenna 41.

On the other hand, the antenna 21 receives GPS II, 12.1:3 radio waves, and the GPS receiver 22 receives GPS II, 12.1:3 radio waves.
The latitude and longitude position information is detected from the radio waves, and the information is output to the latitude/longitude information modulator 23. When the transceiver 27 receives the ID information of the mobile stations 1-4 all at once or through polling or a specific one via the antenna 30,
1 of the ID information modulator 24 to the latitude and longitude position information output of the latitude/longitude information modulator 23.
2D information is added by an adder 25 to form a series of signals, which is transmitted to the base station 15 via a transceiver interface 26 and a transceiver 27.

On the base station 15 side, the transceiver 42 receives the information via the antenna 41-, and the latitude/longitude/ID information demodulator 46 receives the latitude/longitude information and IDfi'? via the transceiver interface 45. The information is output as a digital signal, and the display controller 47 displays map 1. on the screen -1- of the display CRT 49. ID code and/or ★ etc. are displayed at the latitude and longitude point.

Therefore, the display CRT 49 on the base station 15 side
The positions (latitude and longitude) of all mobile stations 14 can be displayed on the screen. If a vehicle is set as this mobile station 1-4,
It is possible to manage multiple vehicles and control the transportation and dispatch of people, cargo, etc. It is also possible to control the deployment of police forces, etc. for patrols by police, security companies, etc., especially for traffic enforcement. can be done precisely.

In this embodiment, voice communication can be performed using the speaker 28 and two microphones of the transceiver 27 provided in the mobile station 14 and the speaker 43 and microphone 44 of the transceiver 42 provided in the base station 15. Therefore, verbal communication between base station 15 and mobile station 14 can also be maintained.

In this way, the mobile station position monitoring system of the above embodiment uses the GPS]i, , 12.13 to determine the longitude and latitude of the position of the mobile station 14 such as the axle.
The positioning information obtained by measurement by the receiver 22 and the latitude/longitude information modulator 23 and the ID information of the ID information modulator 24 of the mobile station 14 itself are added to the ID information by the adder 25 and converted into an arrow. A series of signals are sent to the base station 15 via the transceiver interface 26 and the transceiver 27.
The transceiver 42 receives the transmission signal from the mobile station position measurement transmission means via the antenna 4], and the latitude/longitude/ID information demodulator 46 converts the positioning information and the mobile station. The device's ID information is recovered and the display CRT 49 is installed based on the obtained positioning information.
The mobile station 14 is equipped with reception display means for displaying the area corresponding to the map and displaying the location of the mobile station 14 on the map.

Therefore, the GPS
I, 12.13, the positions of mobile stations 1-4 are measured, information about the mobile station itself that has been obtained is added to the positioning information obtained thereby, and the information is encoded, modulated, and transmitted. Further, the reception display means receives the transmitted signal, demodulates it, and demodulates the positioning information and the information of the mobile station itself.
Based on the obtained positioning information, the location of the mobile station can be displayed on the map by superimposing it on a map showing the corresponding area.

Furthermore, the mobile station position monitoring system of this embodiment is as follows:
Mobile stations such as wheels using GPS II, 12, 1.3] 4
Because it measures the longitude and latitude of a location, there is no need to install sign posts in public places such as roads, unlike conventional distributed transmission and reception methods.
An inexpensive system with low equipment costs can be provided.

5 In this embodiment, since it is sufficient to prepare radio waves for mutual communication from the base station 15 within the service area, the mobile station 1
-4 There is no blank area for detection.

Furthermore, the mobile station position monitoring system of this embodiment has the following features:
Since the longitude and latitude of the position of the mobile station 14 such as a vehicle is measured using GPS II, 12.13, the position of the mobile station can be detected with high accuracy and the reliability of position display can be improved.

By the way, the mobile station position measurement and transmission means of the mobile station position monitoring system according to the above embodiment/example is GPSl 1,
]-2, 1, and 3, the longitude and latitude of the position of the mobile station 14 such as a vehicle are transmitted to the antenna 21, the GPS receiver 22, the latitude and
The positioning information measured by the longitude information modulator 23 and the ID information modulator 2 of the mobile station 1-4 itself that obtained it.
The ID information of 4 is added by an adder 25 to form a series of encoded signals, and the signal is transmitted to the base station 15 via the transceiver interface 26, )-transceiver 27 on the mobile station location side-6. ing. However, when implementing the present invention, it is necessary to use a means that can measure the position of a mobile station using GPS, encode the positioning information obtained thereby and the information of the mobile station itself, and transmit it by radio waves. That's good.

Further, the reception display means of the mobile station position monitoring system of the above embodiment receives the transmission signal from the mobile station position measurement transmission means via the antenna 41) and the transceiver 42, and converts the latitude/longitude/ID information demodulator into a latitude/longitude/ID information demodulator. 46, the 41 position information and the ID information of the mobile station itself are restored, the corresponding area is displayed on the display CRT 49 based on the obtained positioning information, and the mobile station 14 is superimposed on the map. It is used to display the location. However, when implementing the present invention, receiving the transmission from the mobile station position measurement transmitting means, demodulating the positioning information and the information of the mobile station itself,
Map I displaying the corresponding area based on the obtained positioning information
It is sufficient as long as the position is displayed at -.

[Effects of the Invention] As described below, the mobile station position monitoring system of the present invention uses the mobile station position measurement transmitting means to measure the position of the mobile station using a positioning artificial satellite and the positioning information obtained by the mobile station position measurement transmitting means. The obtained information of the mobile station itself is encoded, modulated and transmitted, and the transmitted signal is received by the reception display means,
It decodes the positioning information and information about the mobile station itself, and displays the location on a map displaying the corresponding area based on the obtained positioning information.

Therefore, there is no need to divide the service area where the location of the mobile station can be detected, eliminating blank areas, and
Measuring mobile station positions with high accuracy using positioning satellites,
Since the position is displayed on a map, the position of the mobile station can be detected and displayed with high precision without requiring any manpower, and furthermore, it does not require a sign post and can be implemented with low capital investment.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an outline of a mobile station position monitoring system that is an embodiment of the present invention, and FIG. 2 is a block diagram of a mobile station of the mobile station position monitoring system that is an embodiment of the present invention. FIG. 3 is a block diagram of a command station of a mobile station position monitoring system that is an embodiment of the present invention, and FIG. 4 is a schematic configuration diagram of a conventional AVM distributed transmission system.
FIG. 5 is a schematic diagram of a conventional AVM distributed reception system, and FIG. 6 is a schematic diagram of a conventional AVM semi-automatic system. In the figure, 11.12.13: Positioning satellite (GPS) 14: Mobile station 15: Base station 49: CRT for display. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts.

Claims (1)

[Claims] Mobile station position measurement in which the position of a mobile station is measured using a positioning artificial satellite, and the positioning information obtained thereby and the obtained information of the mobile station itself are encoded, modulated, and transmitted. transmitting means; and receiving the transmission signal from the mobile station position measurement transmitting means, demodulating the positioning information and information on the mobile station itself, and displaying the position on a map displaying the corresponding area based on the obtained positioning information. A mobile station position monitoring system comprising: reception display means.