JPH10271555A - Mobile object position detection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize and lighten a portable equipment and to eliminate the need of a battery by making a first mobile object carry a responder for transmitting identification response signals at the time of receiving interrogation signals from a second mobile object and providing the second mobile object with a position detection means for detecting its own present position and a communication means for adding the position information to the received response signals and transmitting them to a base station. SOLUTION: The first mobile object 1 carries the responder 2. At the time of receiving the interrogation signals from a communication equipment 4 loaded to the second mobile object 3, the responder 2 receives power from the signals and transmits ID information as the response signals. The communication equipment 4 is provided with a car speed detection part and transmits the interrogation signals with frequency proportional to a car speed. Also, a GPS part for receiving GPS signals and calculating the present position and a communication part for adding present position information to the ID information received by an interrogator and transmitting them to the base station 5 are provided. The base station 5 compares the received ID information with search request information, and when they match, reports the position information through a public line network 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object position detecting system for detecting the position of a moving object such as a person or a car with another moving body such as a car and informing a base station of the position.

[0002]

2. Description of the Related Art In recent years, systems for searching for the location of a mobile object such as a person or a car or the location of a mobile object such as a stolen article by radio waves have been developed. For example, Japanese Unexamined Patent Application Publication No. Hei 5-336028 discloses a radio transmitter in which a relay station is installed on a power pole that runs over a power distribution line, and the relay station is carried by a mobile body such as a carrier. After receiving the recognition code from,
The information is transmitted to the information control device via the power distribution line, and the information control device detects the position of the moving body based on the recognition code from the relay station.

[0003] Further, the one described in Japanese Patent Application Laid-Open No. 6-204939 allows, for example, a person to carry a radio transmitter for emitting radio waves with an ID (identification code), and to transmit radio waves from this radio transmitter. When a wireless relay device installed in a public telephone box or the like receives a signal, the ID attached to the received radio wave
Information and location information are transmitted from the wireless relay device to the management center and homes in a wired manner, or radio waves from the wireless transmitter are received by a car phone or mobile phone in a nearby passing car and attached to this radio wave. The mobile phone or mobile phone emits radio waves by adding vehicle position information detected by a navigation system that performs position detection using an artificial satellite to the ID information, and transmits the ID information and the position information to the management center. .

[0004]

These conventional moving object position detecting systems are systems for carrying a radio transmitter on a moving object such as a person or a car, and have a problem that the equipment to be carried is large and heavy. Was. In addition, since the wireless transmitter continuously transmits radio waves, it is necessary to always consider the life of the battery. In addition, the relay station and the wireless relay device also need to keep the receiving state at all times, and there is a problem that the power consumption of the entire system increases. Further, there is a problem that radio waves are interfered when a plurality of moving objects carrying a wireless transmitter are present nearby.

Therefore, according to the first to third aspects of the present invention, it is possible to reduce the size and weight of a portable device, eliminate the need for a battery, and reduce the power consumption of the entire system. Provide a detection system.

Further, the inventions according to claims 2 and 3 further provide a mobile object position detecting system capable of reducing communication traffic.

[0007]

According to the first aspect of the present invention,
A first mobile unit, a second mobile unit, and a base station;
The moving body has a transponder that receives a query signal from the second moving body, receives power from this signal, and transmits a response signal including identification information, and the second moving body has its own moving speed. When the interrogator receives the response signal, the interrogator receives the response signal from the transponder, receives the response signal from the transponder, and receives the response signal from the transponder. First communication control means for adding the current position information detected by the position detection means to the identification information of the response signal and transmitting the information to the base station, the base station transmits the identification information and the current A second communication control means for receiving the position information, a comparison means for comparing the identification information received by the second communication control means with search identification information inputted in advance, and detecting a match or a mismatch; Means match identity Upon detection, it is provided with a main control means for outputting the current position information received.

The invention according to claim 2 comprises a first mobile unit, a second mobile unit and a base station, wherein the first mobile unit is a second mobile unit.
When receiving an interrogation signal from the mobile unit, a transponder is provided that receives power from the signal and transmits a response signal including identification information, and the second mobile unit sets the interval of the interrogation wave according to its own moving speed. An interrogator for transmitting a controlled interrogation signal and receiving a response signal from the transponder; a position detecting means for detecting its own current position; and when the interrogator receives the response signal, the identification information of the response signal is transmitted to the base station. First communication control means for transmitting the current position information detected by the position detecting means to the base station when the base station transmits the current position information to the base station and receiving a request for transmission of the current position information from the base station; Second
A second communication control means for receiving the identification information and the current position information from the moving object and transmitting a request for transmitting the current position information to the second moving object; and the second communication control means Upon receipt, the comparison means compares the search identification information input in advance with the search identification information to detect a match or mismatch, and when the comparison means detects a match of the identification information, a request for transmitting the current position information is sent to the second communication control means. And when the second communication control means receives the current position information, a main control means for outputting the received current position information is provided.

The invention according to claim 3 comprises a first mobile unit, a second mobile unit and a base station, wherein the first mobile unit is a second mobile unit.
When receiving an interrogation signal from the mobile unit, a transponder is provided that receives power from the signal and transmits a response signal including identification information, and the second mobile unit sets the interval of the interrogation wave according to its own moving speed. An interrogator that transmits a controlled interrogation signal and receives a response signal from a transponder, a position detecting unit that detects its own current position, and when the interrogator receives the response signal, identifies the identification information of the response signal in advance. A comparison means for comparing the inputted search identification information to detect a match or a mismatch, and when the comparison means detects a match of the identification information,
First communication control means for adding the current position information to the received identification information and transmitting the information to the base station;
Of receiving identification information and current location information from a mobile object
And main control means for outputting the current position information received by the second communication control means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) In this embodiment, an embodiment corresponding to claim 1 will be described.

FIG. 1 shows the configuration of the entire system.
Receives a query signal from a second mobile body, which will be described later, and receives power from this signal to transmit a response signal including identification information. An interrogator that transmits an interrogation signal in which the interrogation wave interval is controlled in accordance with the moving speed and receives a response signal from the transponder 2, a position detecting unit that detects a current position of the self, and the interrogator transmits a response signal. When received, the identification information of the response signal is added to the current position information detected by the position detecting means and transmitted to the base station. The second mobile unit 5 has a second communication control unit for receiving identification information and current position information from the second mobile unit, and the identification information received by the second communication control unit is input in advance. Search identification and A comparison unit for comparing and detecting a match or a mismatch; a main control unit for outputting the received current position information when the comparison unit detects a match of the identification information; .

As shown in FIG. 2, the transponder 2 comprises a control unit 21, a receiving unit 22, a transmitting unit 23, a storage unit 24, and a transmission / reception separating unit 26 connected to an antenna 25. 3 is received by the antenna 25 and supplied to the receiving unit 22 via the transmission / reception separating unit 26,
The receiving unit 22 is configured to convert the interrogation signal into a digital signal and supply the digital signal to the control unit 21.

The storage unit 24 stores its own identification information (hereinafter, referred to as ID information) in advance. When the control unit 21 receives a digital signal from the reception unit 22, the control unit 21 transmits the identification information to the storage unit 24. The ID information is read, and the ID information is supplied to the transmission unit 23 while measuring the timing with a random number generated by a random number generation unit provided therein. The transmission unit 23 converts the ID information from the control unit 21 into an analog signal. The converted response signal is transmitted to the space from the antenna 25 via the transmission / reception separation unit 26.

When the interrogator 2 receives the interrogation signal from the second mobile unit 3, the transponder 2 takes in the power contained in the received wave and sends it to the control unit 21, the receiving unit 22, and the transmitting unit 2.
3 and a power source for driving the transmission / reception separation unit 26.

FIG. 3 shows an interrogator 31 housed in a control box 4 mounted on the second mobile unit 3, a GPS (Global Positioning System) unit 32 as position detecting means,
FIG. 4 is a block diagram illustrating a configuration of a circuit unit including a vehicle speed detection unit 33 that detects a vehicle speed of the second mobile unit 3 and a communication unit 34 as a first communication control unit. The interrogator 31 includes an interrogator control unit 311. , Receiving unit 312, transmitting unit 313, antenna 3
14 comprises a transmission / reception separation unit 315 connected to the transmission / reception unit 14.

When the interrogator 31 transmits an interrogation signal, the interrogator control unit 311 controls the transmission unit 313 and the second mobile unit 3 detected by the vehicle speed detection unit 33.
The interrogation signal is transmitted from the transmission unit 313 to the antenna 314 via the transmission / reception separation unit 315 while controlling the interval of the interrogation wave according to the vehicle speed of the vehicle, and transmitted from the antenna 314 to the space. In addition, the interrogator 31
Transmits the response signal from the transponder 2 to the antenna 314
, The response signal is supplied to the receiving unit 312 via the transmission / reception separating unit 315. The receiving unit 312 converts the response signal into a digital signal to extract ID information.
1 is supplied. The interrogator control unit 31
Numeral 1 informs the communication control section 341 of the communication section 34 that the ID information has been received, and supplies the ID information to the ID / position information synthesizing section 342.

The GPS section 32 has a GPS control section 321.
And a GPS receiving unit 323 connected to the antenna 322. The GPS receiving unit 323 receives radio waves from the GPS dedicated satellite via the antenna 322, and the GPS control unit 321 detects the current position based on the received signal. Has become.

The communication unit 34 includes the communication control unit 341
And an ID / position information combining unit 342, a receiving unit 343,
The communication control unit 341 includes a transmission / reception separation unit 346 connected to a transmission unit 344 and an antenna 345. When the reception of ID information is transmitted from the interrogator control unit 311 of the interrogator 31, the communication control unit 341 notifies the GPS control unit 321 of its own. Outputs a position detection request. Thus, the GPS control unit 321 detects the current position information of the second mobile unit 3 and supplies the current position information to the ID / position information combining unit 342.

The ID / position information synthesizing section 342 synthesizes the ID information from the interrogator 31 and the position information from the GPS section 32. The communication control unit 3
41 receives the combined signal from the combining unit 342 and outputs the combined signal to the transmitting unit 344. The transmitting unit 344 converts the combined signal into an analog signal and converts the combined signal into a transmission / reception separating unit 346.
Is transmitted from the antenna 345 to the base station 5 via the.

That is, the communication control unit 341
As shown in (1), when a request to start a query is received from the base station 5, an interrogation signal transmission command is output to the interrogator control unit 311 in step S1 and the GP is
A drive command is output to the S control unit 321. Accordingly, in the interrogator 31, the interrogator control unit 311 controls the transmission unit 313, and the transmission unit 31 controls the interrogation wave interval in accordance with the vehicle speed of the second mobile unit 3 detected by the vehicle speed detection unit 33.
3 transmits an interrogation signal via the transmission / reception separation unit 315 and the antenna 314. In the GPS unit 32, the GPS control unit 321 controls the GPS receiving unit 323 to detect the position of the second mobile unit 3.

In this state, the system waits for reception of ID information from the transponder 2 of the first mobile unit 1. During this time, when the search target is found and it is no longer necessary to search, the base station 5 issues a request to cancel the query. When the communication control unit 341 receives this question stop request, the interrogator control unit 3 determines in step S3.
11 and output a query signal stop command to
At 4, a drive stop command is output to the GPS control unit 321.

When the interrogator 31 receives the ID information from the responder 2 of the first mobile unit 1, the communication controller 341
The D / position information synthesizing unit 342 is controlled to receive the current position information from the GPS control unit 321 of the GPS unit 32 in step S5, and the first mobile unit 1 received in step S6 is received.
ID information and position information are combined, and the combined ID
Receive location information. Then, in step S7, the transmitting section 344 is controlled to transmit the ID / position information to the base station 5.

As shown in FIG. 5, the base station 5 comprises a host computer 51 constituting a main control means connected to a public line network, a receiving section 52, a transmitting section 53, and a receiving section 52.
And a second communication control unit including a transmission / reception separation unit 56 connected to an antenna 55, a storage unit 57, an ID / position information separation unit 58, and an ID constituting a comparison unit. An information comparing section 59,
The ID / position information transmitted from the communication unit 34 of the mobile unit 3 is received by the antenna 55 and supplied to the reception unit 52 via the transmission / reception separation unit 56. After the reception unit 52 converts the information into a digital signal, the control unit 54.

The control unit 54 transmits the ID / position information to the I
D / position information separating section 58, the ID / position information separating section 58 separates the ID / position information into ID information and position information, and supplies the ID information to the ID information comparing section 59; The information is supplied to the host computer 51. The ID information comparing section 59 compares the search ID information stored in the storage section 57 in advance with the received ID information, and supplies the ID information to the host computer 51 when they match. The storage unit 5
The host computer 51 writes the search ID information to the host computer 7.

When the host computer 51 receives the notification of the coincidence of the ID information from the ID information comparing section 59, the host computer 51 reports the position information to the home or the like that has received the search request via the public line network, and can confirm the report. The search ID information stored in the storage unit 57 is cleared.

That is, when the search ID information is registered in the storage unit 57 by the host computer 51, the base station 5 first controls the transmission unit 53 by the control unit 54 in step S11 as shown in FIG. A question start request is transmitted to the second mobile unit 3. In this state, the first mobile unit 3
Waiting for the reception of the ID / position information of the moving object 1 during this time, and when the search target person is found and it is no longer necessary to perform the search, the query cancellation determination is made. In step S12, the host computer 51 searches the storage registered in the storage unit 57. The ID information is deleted, and the control unit 54 transmits a question stop request signal to the second mobile unit 3 in step S13.

When the receiving unit 52 receives the ID / position information of the first mobile unit 1 from the second mobile unit 3, the control unit 5
4 supplies the ID / position information to the ID / position information separation unit 58. The ID / position information separating unit 58 determines in step S14
Separates the ID / position information into ID information and position information.
The D information is output to the ID information comparison unit 59 and the position information is output to the host computer 51.

In step S15, the ID information comparing section 59
The search ID information registered in the storage unit 57 is read, and the received ID information is compared with the search ID information. If the ID information matches, the ID information is notified to the host computer 51 in step S16. As a result, the host computer 51 reports the location information to the home or the like that has received the search request via the public line network. Then, in step 17, the search ID information is deleted from the storage unit 57.
When the ID information does not match, it is determined that the ID information has not been requested to be searched, and the second mobile unit 3 is again determined.
It waits for reception of ID / position information from.

In the mobile object position detection system having such a configuration, when a search request is issued to the base station 5, the host computer 51 registers the corresponding search ID information in the storage unit 57. Then, the control unit 54 transmits a question start request signal to the second mobile unit 3. Upon receiving the inquiry start request signal, the communication control units 341 of all the second mobile units 3 managed by the base station 5 output an inquiry signal transmission command to the interrogator control unit 311.

Thus, the interrogator control unit 311 receives the current vehicle speed information of the second mobile unit 3 from the vehicle speed detection unit 33, controls the transmission unit 313, and controls the interval of the interrogation wave according to the vehicle speed. The interrogation signal is transmitted from the transmission unit 313 via the transmission / reception separation unit 315 and the antenna 314.

When the second mobile unit 3 in this state passes near the first mobile unit 1 to be searched, the interrogator 31 of the first mobile unit 1 receives the interrogation signal from the interrogator 31. The ID information registered in the storage unit 24 is transmitted to the interrogator 31 as a response signal. In the interrogator 31, when the receiving unit 312 receives the ID information, the interrogator control unit 311 transmits the ID information to the I
It is supplied to the D / position information synthesizing unit 342.

The ID / position information synthesizing unit 342 is provided for the interrogator 31.
When the ID information is received from the GPS unit 32, the current position information is fetched from the GPS unit 32, and the ID
The position information is supplied to the communication control unit 341. Thereby, the communication control unit 341 controls the transmitting unit 344 to transmit the ID / position information to the base station 5.

The base station 5 transmits the ID / position information to the receiving section 52.
Receives the ID / position information,
It supplies to the position information separating unit 58 and notifies the ID information comparing unit 59 that the ID information has been received. The ID / position information separation unit 58 separates the received ID / position information into ID information and position information, supplies the ID information to the ID information comparison unit 59, and supplies the position information to the host computer 51.

Thus, the ID information comparing section 59 reads the search ID information registered in the storage section 57, compares it with the received ID information, and supplies the ID information to the host computer 51 when a match is detected. As a result, the host computer 51 informs the home that has made the search request via the public line network of the location information of the searcher by telephone, facsimile, or the like. When the notification is confirmed, the search ID information registered in the storage unit 57 is deleted.

As described above, in this system, the first mobile unit 1 such as a person carries the transponder 2 which operates by receiving the interrogation signal from the second mobile unit 3. When the interrogator 31 receives the interrogation signal from the interrogator 31, it operates as a power source and transmits the ID information stored in the storage unit 24 to the interrogator 31 as a response signal. There is no need to keep transmitting radio waves at all, and no battery is required. Therefore, the transponder 2, which is a portable device, can be sufficiently reduced in size and weight. In addition, since the power consumption of the interrogator 31 as well as the transponder 2 can be reduced, the power consumption of the entire system can be reduced.

In this system, the transponder 2 randomly shifts the transmission timing of the response signal with respect to the interrogation signal from the interrogator 31, and the interrogator 31 transmits the response signal to the transponder 2 when the response signal is successfully received. By transmitting an ACK signal to the transponder 2 and transmitting a response signal retransmission request to the transponder 2 when reception of the response signal fails, a plurality of Transponder 2
Is present, the interrogator 31 can surely receive the response signal from each transponder 2.

In this system, if the object to be searched is a person carrying the transponder 2, the antenna 31 of the interrogator 31 is used.
Numeral 4 may have directivity on the side of the sidewalk, and if the search target is an automobile equipped with the transponder 2, the antenna 314 may have directivity about 120 degrees forward with respect to the second moving body 3. In any case, it is possible to narrow down the directivity and concentrate the power in a certain direction to transmit the interrogation signal.

In this embodiment, the second mobile unit 3
, The antenna 314 of the interrogator 31 and the GPS unit 32
Although the antenna 322 and the antenna 345 of the communication unit 34 are configured as separate antennas, the present invention is not limited to this, and the antenna 322 may be configured with one common antenna.

(Second Embodiment) In this embodiment, an embodiment corresponding to claim 2 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and different parts will be described. The transponder 2 of the first mobile unit 1 has the same configuration as that shown in FIG. Second moving body 3
Of the circuits stored in the control box 4 of the interrogator 31,
The configurations of the GPS unit 32 and the vehicle speed detection unit 33 are the same, but the configuration of the communication unit 34 is different.

As shown in FIG. 7, the communication section 34 of this embodiment eliminates the ID / position information synthesizing section 342, and the communication control section 347 performs the control shown in FIG. That is, upon receiving a question start request from the base station 5,
In step S21, an interrogation signal transmission command is output to the interrogator control unit 311 and, in step S22, a driving command is output to the GPS control unit 321.

In this state, the system waits for reception of ID information from the transponder 2 of the first mobile unit 1. During this time, when the search target is found and it is no longer necessary to search, the base station 5 sends a query stop request. When the communication control unit 347 receives this question suspension request, in step S23, the interrogator control unit 3
11 and output a query signal stop command to
At 24, a drive stop command is output to the GPS control unit 321.

When the interrogator 31 receives the ID information from the responder 2 of the first mobile unit 1, the communication control unit 347
In step S25, the received ID information is transmitted to the base station 5. Then, when the matching information of the ID information is received from the base station 5, the current position information is read from the GPS control unit 321 of the GPS unit 32 in step S26, and the process proceeds to step S27.
Controls the transmitting unit 344 to transmit the position information to the base station 5.

The base station 5, as shown in FIG.
The position information separation unit 58 is eliminated, and the control shown in FIG. 10 is performed. That is, in step S41, the control unit 541 controls the transmission unit 53 to transmit a question start request to the second mobile unit 3. In this state, the system waits for the reception of the ID information of the first mobile unit 1 from the second mobile unit 3, and when it is no longer necessary to find and search the search target person during this time, a question stop determination is made. The host computer 51 deletes the search ID information registered in the storage unit 57, and the control unit 541 transmits a question stop request signal to the second mobile unit 3 in step S43.

When the receiving unit 52 receives the ID information of the first mobile unit 1 from the second mobile unit 3, the control unit 541 supplies the ID information to the ID information comparing unit 591. ID
The information comparison unit 591 reads the search ID information from the storage unit 57 in step S44, and receives the received ID information and the search ID.
Compare D information. If the ID information does not match, the ID mismatch information is transmitted to the second mobile unit 3 in step S45.

If the ID information matches, step S
At 46, ID matching information is transmitted to the second mobile unit 3. Then, in step S47, the process waits for reception of the position information from the second mobile unit 3, and upon receiving the position information, notifies the host computer 51 of the ID information and the position information in step S48. As a result, the host computer 51 reports the location information to the home or the like that has received the search request via the public line network. Then, in step 49, the search ID information is deleted from the storage unit 57.

In this moving object position detecting system,
When the interrogator 31 receives the ID information from the responder 2, the second mobile unit 3 first transmits only the ID information to the base station 5 without combining with the position information, and the base station 5 stores the ID information upon receiving the ID information. Compare with the search ID information registered in the section 57,
When the information matches, the second mobile unit 3 is notified of the information, and the second mobile unit 3 receiving the information reads the current position information from the GPS unit 32 and transmits it to the base station 5.

When the base station 5 receives the position information from the second mobile unit 3, the base station 5 notifies the host computer 51 together with the previously received ID information, and the host computer 51 sends the search request via the public line network to the house where the search was requested. The location information of the searcher is notified by telephone or facsimile. When the notification is confirmed, the search ID information registered in the storage unit 57 is deleted.

As described above, in this embodiment,
Even when the second mobile unit 3 receives the ID information from the transponder 2 of the first mobile unit 1, the second mobile unit 3 does not always send the ID information and the position information to the base station 5, and the base station 5 checks whether the ID information matches. Only when detected, the position information is transmitted to the base station 5. Therefore, communication traffic can be reduced. In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

(Third Embodiment) In this embodiment, an embodiment corresponding to claim 3 will be described. The same parts as those in the first embodiment are denoted by the same reference numerals, and different parts will be described. The transponder 2 of the first mobile unit 1 has the same configuration as that shown in FIG. Second moving body 3
Of the circuits stored in the control box 4 of the interrogator 31,
The configurations of the GPS unit 32 and the vehicle speed detection unit 33 are the same, but the configuration of the communication unit 34 is different.

The communication unit 34 of this embodiment includes a storage unit 3
49 and an ID information comparison unit 350 are newly provided, and the communication control unit 348 performs the control shown in FIG. That is, upon receiving a question start request from the base station 5,
In step S51, an interrogation signal transmission command is output to the interrogator control unit 311 and, in step S52, a driving command is output to the GPS control unit 321.

Then, the process waits for reception of the search ID information from the base station 5, and when the search ID information is received, the search ID information received in step S53 is registered in the storage unit 349. In this state, the system waits for reception of the ID information from the transponder 2 of the first mobile unit 1. During this time, when the search target person is found and there is no need to search, the base station 5 issues a request to cancel the query. Upon receiving this question suspension request, unit 348 deletes the search ID information registered in storage unit 349 in step S54, outputs an interrogation signal stop command to interrogator control unit 311 in step S55, and in step S56. A driving stop command is output to the GPS control unit 321.

When the interrogator 31 receives the ID information from the responder 2 of the first mobile unit 1, the communication controller 347
In step S57, the search ID information is read from the storage unit 349 and supplied to the ID information comparison unit 350. As a result, the ID information comparison unit 350 compares the search ID information with the received I
The D information is compared, and the result is notified to the communication control unit 348.

The communication control unit 348 includes an ID information comparing unit 3
50, the ID information is received from the ID information comparing unit 350 and output to the ID / position information synthesizing unit 342. In step S58, the GP
The position information is read from the GPS control unit 321 of the S unit 32
Output to D / position information synthesizing section 342. Then, in step S59, the search ID information registered in the storage unit 349 is deleted, and in step S60, the ID / position information synthesizing unit 342 outputs
The D information and the position information are combined, and the ID and position information combined in step S61 is transmitted to the base station 5.

The base station 5, as shown in FIG.
The D information comparison unit 59 is eliminated, and the control shown in FIG. 14 is performed. That is, in step S71, the control unit 5
Reference numeral 42 controls the transmission unit 53 to transmit a question start request to the second mobile unit 3. In this state, the first mobile unit 3
Waiting for the reception of the ID information and the position information of the mobile unit 1, and when the search target person is not found and need not be searched during this time, a question stop determination is made, and a question stop request is issued to the second mobile unit 3 in step S 72. Send a signal.

Further, in step S73, the receiving section 52
ID information and position information of the first moving body 1 from the moving body 3 of
That is, when the combined ID / position information is received, the control unit 542 deletes the search ID information registered in the storage unit 57 in step S74, and separates the ID / position information into ID information and position information in step S75. Then, in step S76, the ID information and the position information are notified to the host computer 51. As a result, the host computer 51 reports the location information to the home or the like that has received the search request via the public line network.

In this moving object position detecting system,
The base station 5 transmits search ID information to the second mobile unit 3 in advance, and the second mobile unit 3 receives the search ID information and registers it in the storage unit 349. Then, the second mobile unit 3 causes the interrogator 31 to transmit an interrogation signal. In this state, when the interrogator 31 receives the ID information from the responder 2, the ID information comparison unit 350 compares the ID information with the search ID information registered in the storage unit 349, and only when the ID information matches, the ID / position information synthesis unit 34
In step 2, the ID information and the position information from the GPS unit 32 are combined and transmitted to the base station 5.

When the base station 5 receives the ID / position information from the second mobile unit 3, it separates it and reports it to the host computer 51. The host computer 51 sends the information to the home where the search was requested via the public network. The location information of the searcher is notified by telephone or facsimile.

As described above, in this embodiment,
The second mobile unit 3 is provided with an ID information comparison unit 350, and the ID / position information is registered only when the ID information from the transponder 2 of the first mobile unit 1 is registered in the storage unit 349 and matches the search ID information. Since transmission to the base station 5 is performed, the transponder 2
Does not always transmit the ID information and the position information to the base station 5 even if the ID information is received from the base station 5, and the communication with the base station 5 is performed when the ID information matches when the search ID information is first received.
It is sufficient to transmit the D / position information once, and communication traffic can be further reduced. In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In each of the above-described embodiments, the present invention is applied to the case where the first mobile unit 1 such as a person carrying the transponder 2 and the second mobile unit 3 such as an automobile equipped with the interrogator 31 and the like. The present invention has been described with reference to the case where the present invention is applied to a moving object position detecting system including the base station 5. However, the present invention is not necessarily limited to this, and can also be applied to a moving object position detecting system having the configuration shown in FIGS. .

FIG. 15 shows a mobile object position detection system using a business radio such as a home delivery company or a taxi company, a general mobile phone or a car phone. In other words, each company, such as a courier company or a taxi company, has already carried out their respective operations using radio equipment, and the headquarters can always grasp the current position of the truck and taxi of each company. I have. Therefore, the trucks and taxis of each trader are used as the second mobile unit 103, the headquarters is used as the base station 105, and the second mobile unit 103 is equipped with a control box 104 containing a circuit unit such as an interrogator and a position detecting unit. .

When a search request is received from each home or police station to the base station 105 and search ID information is received, the search ID information is stored in the storage unit. Then, the base station 105 wirelessly notifies each second mobile unit 103 that a search request has been issued. When each second mobile unit 103 confirms that a search request has been issued from the base station 105, it continues to transmit an interrogation signal from the interrogator while performing home delivery service and taxi service, and Wait for reception.

When the second mobile unit 103 passes near the first mobile unit 1 carrying the transponder 2, the interrogator receives the ID information from the transponder. The transmitted location information and the received ID information are transmitted to the base station 105. The base station 105 receives the ID information and the search ID.
We compare information and report to home and police station when they match. If they do not match, it waits for the next reception.

A control box 114 containing a circuit unit such as an interrogator and a position detecting means is also connected to a second mobile unit 113 such as a portable telephone or a car telephone. When the interrogator receives the ID information from the transponder 2 when passing near the mobile unit 1 of the second mobile unit 113, the second mobile unit 113 automatically dials the base station 105 via the relay station 115 to transmit the ID information. Send information and location information.

As described above, an existing home delivery company's truck, taxi, or the like can be used as the second mobile unit, or a mobile phone, a car phone, or the like can be used as the second mobile unit. Further, if the transponder 2 is attached not only to a person but also to, for example, valuables, it can be applied to a search when the valuables are stolen or misplaced.

FIG. 16 shows the use of a light or radio beacon. Currently, a light or radio beacon 116 is installed on a national highway or an expressway, etc., and a 'VICS' service for providing traffic congestion information for car navigation. Has been started.
This service is operated by the Road Traffic Information and Communication System Center.
Is used as a communication unit between the communication unit of the second mobile unit 3 and the base station 5.

When a search request is sent from each home or police station based on search ID information, the base station 5 sends a beacon 11
6, the second mobile unit 3 is notified that a search request has occurred. When the second mobile unit 3 including the interrogator, the position detecting unit, the timing unit, the storage unit, and the communication unit with the beacon 116 passes under the beacon 116, a search request is issued from the base station 5. After confirming this, the interrogator continues to transmit the interrogation signal to the transponder and waits for the reception of the response signal from the transponder 2 of the first mobile unit 1.

The first mobile unit 3 carries the transponder 2
When passing through the vicinity of the mobile unit 1, the transponder 2 transmits ID information as a response signal to the interrogation signal from the interrogator, and the interrogator receives the ID information, and the second mobile unit 3 GP
The current position is detected by position detecting means such as S, and the received I
The D information and the current position information are stored in the storage unit together with the time information at that time. Then, it transmits the ID information, current position information, and time information received when passing under the beacon 116 to the base station 5 via the beacon 116.

The base station 5 searches the transmitted ID information
The information is compared with the D information, and when they match, the corresponding home or police station is notified. If they do not match, it stands by for the next reception. In this manner, the position of the first moving object can be detected using the beacon of light or radio waves.

FIG. 17 shows a mobile object position detecting system using business radio, such as a home delivery company or a taxi company, and a fixed mobile object identifying device connected to a base station 105 by a wire such as a public line network. 117 is arranged. The fixed mobile unit identification device 117 includes an interrogator and a storage unit that stores the position information of the fixed mobile unit. A plurality of fixed mobile unit identification devices 117 are arranged with a large installation interval. Area 1 in which response signal from transponder 2 can be received
The outside of 18 is handled by the second moving body 103.

In this system, the second mobile unit 103 performs the same detection operation as in FIG. When confirming that there is a search request from the base station 105, the fixed mobile unit identification device 117 transmits an interrogation signal to the transponder 2 from the interrogator, and waits for reception of the response signal from the transponder 2.
When the first mobile unit 1 enters the area 118, the interrogator receives a response signal from the responder 2, that is, ID information, adds its own position information to the ID information, and transmits Transmit to the station 105. The base station 105 compares the transmitted ID information with the search ID information, and when they match, notifies the corresponding home or police station. If they do not match, it stands by for the next reception.

As described above, the fixed mobile unit identification device 117 is further installed in the mobile unit position detection system using business radio such as a home delivery company or a taxi operator with a wider interval, so that the fixed mobile unit identification device 117 can be used. Keep costs down,
The resolution can be increased by detecting the area outside the detection area of the fixed mobile object identification device 117 by a mobile object position detection system using business radio such as a home delivery company or a taxi operator. Note that the second mobile unit 103 that detects the first mobile unit 1 is not limited to a mobile unit using business wireless.

(Fourth Embodiment) In this embodiment,
A function of predicting the movable range of the first mobile unit 1 is further added to the base station 5 in the first embodiment, and the base station 5 includes, as shown in FIG. Is added.

The base station 5 includes a host computer 51
When the search ID information is registered in the storage unit 57 according to FIG.
As shown in (1), first, in step S11, the control unit 54 controls the transmission unit 53 to transmit a question start request to the second mobile unit 3. In this state, the system waits for the reception of the ID / position information of the first mobile unit 1 from the second mobile unit 3, and when it is no longer necessary to find the search target person and search, a question stop determination is performed, and step S12 is performed. At host computer 5
1 deletes the search ID information registered in the storage unit 57, and the control unit 54 transmits a question stop request signal to the second mobile unit 3 in step S13.

When the receiving unit 52 receives the ID / position information of the first mobile unit 1 from the second mobile unit 3, the control unit 5
4 supplies the ID / position information to the ID / position information separation unit 58. The ID / position information separating unit 58 determines in step S14
Separates the ID / position information into ID information and position information.
The D information is output to the ID information comparison unit 59 and the position information is output to the host computer 51.

In step S15, the ID information comparing section 59
The search ID information registered in the storage unit 57 is read, and the received ID information is compared with the search ID information. If the ID information matches, the ID information is notified to the host computer 51 in step S16.

Subsequently, it is checked whether or not the history of ID information, that is, a plurality of pieces of past position information and time information for the same ID information is stored in the storage unit 57.
If there is a history of the D information and there is a request for the prediction of the movable range, the past position information and the time for the corresponding ID information stored in the storage unit 57 in the movable range prediction unit 60 in step S18. The first after a predetermined time has passed based on the information
Of the moving object 1 is predicted. In this case, after the elapse of the predetermined time, for example, it is possible to set according to the desired time of the search requester. This allows
The host computer 51 notifies the home or the like that has received the search request via the public line network of the position information and the predicted movement range after the elapse of the predetermined time.

Then, in step S19, the host computer 51 stores ID information, position information, and time information in the storage unit 57. If the history of the ID information does not exist in the storage unit 57, the host computer 51 stores the ID information, the position information, and the time information in the storage unit 57 in step S19.

In the mobile object position detection system having such a configuration, when a search request is issued to the base station 5, the host computer 51 registers the corresponding search ID information in the storage unit 57. Then, the control unit 54 transmits a question start request signal to the second mobile unit 3. When all the second mobile units 3 managed by the base station 5 receive the inquiry start request signal, they transmit the inquiry signal.

In this state, the interrogator 3 of the second mobile unit 3
1 receives the ID information from the transponder 2 of the first mobile unit 1, the ID / position information combining unit 342
D information and the current position information from the GPS unit 32 are synthesized,
The combined ID / position information is transmitted from the communication unit 34 to the base station 5.
Send to

At the base station 5, the ID / position information is
Receives the ID / position information, the ID / position information separating unit 58 separates the ID / position information into ID information and position information.
The information is supplied to the D information comparison unit 59, and the position information is supplied to the host computer 51. The ID information comparison unit 59 is a storage unit 57
ID that reads and receives the search ID information registered in
The ID information is compared with the information, and when a match is detected, the ID information is supplied to the host computer 51. If there is a history of the ID information in the storage unit 57 and there is a request for prediction of the movable range, the movable range prediction unit 60 stores the movable range of the first mobile unit 1 after a predetermined time has elapsed. Make predictions.

Thus, the host computer 51 informs the home that has made the search request via the public line network of the searcher's position information and the estimated movable range by telephone, facsimile or the like. As described above, the current position of the corresponding first mobile unit 1 and the predicted movable range after the lapse of the predetermined time can be notified, so that the first mobile unit 1 can be quickly searched.

FIG. 20 is a diagram showing an embodiment for estimating the movable range of the first mobile unit 1. The first mobile unit 1, which is a searcher carrying the transponder 2, performs the operation at a certain time. If the inquiry signal from the second mobile unit 3A is received and the ID information is transmitted as a response signal to the second mobile unit 3A, the second mobile unit 3A transmits the received ID information and the position information at that time. Transmit to base station. Thereby, the base station stores the ID in the storage unit.
Information, position information and time information are stored.

After the elapse of the time T1, the same first mobile unit 1 carrying the transponder 2 receives the interrogation signal from the second mobile unit 3B, and uses the ID information as a response signal as the response signal. Assuming that the information is transmitted to the base station 3B, the second mobile unit 3B transmits the received ID information and the position information at that time to the base station. Thereby, the base station stores the position information and the time information for the same ID information in the storage unit.

At this time, the location information and time information at the time when the second mobile unit 3A receives the ID information from the transponder 2 and the second mobile unit 3B are stored in the storage unit of the base station. I
Since the position information and the time information at the time of receiving the D information are stored, the traveling direction and traveling speed of the first mobile 1 to be searched are obtained from these two information.

Thus, based on the desired time of the search requester, it is predicted that the first mobile unit 1 can move within the radius R in a certain direction after T time, for example. Then, by notifying the current position information after the lapse of the time T1 and the movable range after the lapse of the time T, the search requester can limit the search range and perform a quick search.

[0086]

As described above, according to the first to third aspects of the present invention, the size and weight of a portable device can be reduced, a battery can be eliminated, and the power consumption of the entire system can be reduced. it can.

According to the second and third aspects of the present invention, communication traffic can be further reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an entire system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a transponder in the embodiment.

FIG. 3 is a block diagram showing a circuit configuration in a control box of a second moving body in the embodiment.

FIG. 4 is a flowchart showing control of a second mobile unit in the embodiment.

FIG. 5 is a block diagram showing a circuit configuration of a base station in the embodiment.

FIG. 6 is a flowchart showing control of a base station in the embodiment.

FIG. 7 is a block diagram showing a circuit configuration in a control box of a second moving body according to the second embodiment of the present invention.

FIG. 8 is a flowchart showing control of a second mobile unit in the embodiment.

FIG. 9 is a block diagram showing a circuit configuration of a base station in the embodiment.

FIG. 10 is a flowchart showing control of the base station in the embodiment.

FIG. 11 is a block diagram showing a circuit configuration in a control box of a second moving body according to the third embodiment of the present invention.

FIG. 12 is a flowchart showing control of a second mobile unit in the embodiment.

FIG. 13 is a block diagram showing a circuit configuration of a base station in the embodiment.

FIG. 14 is a flowchart showing control of a base station in the embodiment.

FIG. 15 is a diagram showing a modification of the moving object position detection system.

FIG. 16 is a diagram showing a modification of the moving object position detection system.

FIG. 17 is a diagram showing a modification of the moving object position detection system.

FIG. 18 is a block diagram showing a circuit configuration of a base station according to a fourth embodiment of the present invention.

FIG. 19 is a flowchart showing control of the base station in the embodiment.

FIG. 20 is a view showing an example of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st mobile body 2 ... Responder 3 ... 2nd mobile body 5 ... Base station 31 ... Interrogator 32 ... GPS part (position detection means) 33 ... Vehicle speed detection part 34 ... Communication part (1st communication control) Means 51 51 Host computer 54 Control unit (second communication control unit) 59 ID information comparison unit (Comparison unit)

Claims (3)

[Claims] 1. A first mobile unit includes a first mobile unit, a second mobile unit, and a base station. When the first mobile unit receives an inquiry signal from the second mobile unit, the first mobile unit receives power from the signal. A transponder for transmitting a response signal comprising identification information is provided, and the second mobile unit transmits a response signal from the transponder while transmitting an interrogation signal in which an interval of an interrogation wave is controlled in accordance with its own moving speed. An interrogator to be received, position detecting means for detecting its own current position, and when the interrogator receives a response signal, the current position information detected by the position detecting means is added to the identification information of the response signal. First communication control means for transmitting to the base station, wherein the base station receives identification information and current position information from the second mobile unit, The identification information received by the communication control means A comparison means for comparing with the search identification information inputted in advance to detect a match or a mismatch, and a main control means for outputting the received current position information when the comparison means detects a match of the identification information are provided. A moving object position detection system, characterized in that: 2. A mobile station comprising a first mobile unit, a second mobile unit, and a base station, wherein the first mobile unit receives power from an interrogation signal from the second mobile unit and receives power from the signal. A transponder for transmitting a response signal comprising identification information is provided, and the second mobile unit transmits a response signal from the transponder while transmitting an interrogation signal in which an interval of an interrogation wave is controlled in accordance with its own moving speed. An interrogator to receive, position detecting means for detecting its own current position, and when the interrogator receives a response signal, transmits identification information of the response signal to the base station; and First communication control means for transmitting the current position information detected by the position detection means to the base station when there is an information transmission request; and the base station transmits identification information from the second mobile unit. Receive current location information And a second communication control means for transmitting a request for transmission of current position information to the second mobile body, and when the second communication control means receives the identification information, the second communication control means compares the identification information with search identification information which is input in advance. Comparing means for detecting coincidence or non-coincidence, and when the comparing means detects coincidence of identification information, the second communication control means transmits a request for transmission of current position information to the second communication control means. And a main control means for outputting the received current position information when receiving the current position information. 3. A first mobile unit, a second mobile unit, and a base station, wherein the first mobile unit receives power from the interrogation signal from the second mobile unit when receiving the interrogation signal from the second mobile unit. A transponder for transmitting a response signal comprising identification information is provided, and the second mobile unit transmits a response signal from the transponder while transmitting an interrogation signal in which an interval of an interrogation wave is controlled in accordance with its own moving speed. An interrogator to be received, position detecting means for detecting its own current position, and when the interrogator receives a response signal, the identification information of the response signal is compared with the search identification information input in advance, and it is determined whether there is a match or not. And first communication control means for adding the current position information to the received identification information and transmitting the same to the base station when the comparison means detects a match of the identification information, The station may perform the second transfer. Movement provided with second communication control means for receiving identification information and current position information from a moving object, and main control means for outputting current position information received by the second communication control means Body position detection system.