JP2004245683A - Position detecting device, position detecting system, position detecting method, and position detecting program - Google Patents

Abstract

An object of the present invention is to detect a position of a moving body.
A transmission unit of a position detection device transmits a position detection inquiry signal for inquiring of a position detection request from a mobile body to the mobile body using predetermined wireless communication. The receiving unit 23 of the position detecting device 200 receives a position detection request signal captured by the antenna 224a located at the point A as a first position detection request signal. The receiving unit 24 receives the position detection request signal captured by the antenna 224b located at the point B as a second position detection request signal, and the receiving unit 22a detects the position detection signal captured by the antenna 224c located at the point C. The request signal is received as a third position detection request signal. The position detection unit 20 detects the position of the moving object from either the difference in the reception time or the phase difference between the first position detection request signal, the second position detection request signal, and the third position detection request signal.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a position detecting device for detecting a position of a moving body and a method therefor.
[0002]
[Prior art]
A system using a communication device of an ETC (ELECTRONIC TOLL COLLECTION SYSTEM) automatic toll collection system is a method of detecting and comparing signals received from an on-board unit at an ETC tollgate, thereby detecting an ETC vehicle and an ETC vehicle. It discriminates that it is not a car, and communicates only with the ETC car to automatically settle the toll road automatic toll.
[0003]
[Patent Document 1]
JP-A-11-185083
[0004]
[Problems to be solved by the invention]
However, in the communication device of the conventional ETC tollgate, receiving a signal from an ETC vehicle is used as a trigger to determine from the received signal whether the vehicle is an ETC vehicle or a vehicle other than an ETC vehicle. The sequence in which the communication device of the ETC tollgate itself transmits a signal for inquiring of a request for detecting the position of the vehicle to the vehicle side, and the vehicle side responds to the signal by using this signal as a trigger to detect the position is performed. Had not been taken.
[0005]
Also, in wireless communication using DSRC (DEDICATED SHORT RANGE COMMUNICATION), a roadside wireless communication device placed in a store and each vehicle-mounted device mounted on a plurality of vehicles can simultaneously communicate. Thus, the person who gets on the car can receive and pay for purchased items and pay for gasoline refueling while he / she is on the car. For this reason, it is expected that the billing and settlement system (DSRC settlement) using DSRC (boundary area wireless communication) will be used together with the development of infrastructure in the future.
In such a system using DSRC communication, in a place where a plurality of refueling machines are installed, such as a gas station, which car is stopped in front of which numbering refueling machine, and how many cars are stopped at one time In order to provide a high level of service, it is necessary to know in real time how and where the cars are lined up when making a queue to receive refueling, but in the past, the DSRC communication method was used. No system has been constructed to detect the position of the vehicle.
[0006]
An object of the present invention is to detect a position of a moving body.
[0007]
[Means for Solving the Problems]
The position detecting device according to the present invention includes:
A transmitting unit that transmits a position detection inquiry signal for inquiring the presence or absence of a position detection request from the mobile unit to the mobile unit using predetermined wireless communication,
In response to the position detection inquiry signal transmitted by the transmitting unit, a plurality of receiving units that receive a position detection request signal requesting position detection from the mobile body using predetermined wireless communication,
A position detection unit that detects a position of the moving object from a position detection request signal received by each of the plurality of reception units.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, Embodiment 1 will be described.
FIG. 1 is a configuration diagram of a position detection system 100 that detects the position of a vehicle 300 using a position detection device 200.
In the present embodiment, as an example of position detection system 100, a system in which position detection device 200 detects the position of vehicle 300 that refuels gasoline at a gas station will be described.
[0009]
The position detection system 100 includes a vehicle 300 and a position detection device 200. Vehicle 300 and position detection device 200 wirelessly communicate predetermined information in order to detect the position of vehicle 300 by DSRC communication.
The position detection device 200 is connected to a store server 40 in the store 2, and the store server 40 manages the position detection system 100 via a public network 3 such as a LAN (LOCAL AREA NETWORK) and a WAN (WIDE AREA NETWORK). It is connected to the management company 4. In addition, the store server 40 is also connected to a refueling machine 37 that performs refueling requested from the vehicle 300.
[0010]
The position detection device 200 is a device that detects the position of the vehicle 300.
The position detecting device 200 transmits and receives a signal from the vehicle 300 via an antenna 224c, a transmitting / receiving unit 22 for transmitting / receiving the vehicle 300 via an antenna 224a, a receiving unit 23 for receiving a signal from the vehicle 300 via an antenna 224b. And a receiving unit 24 for receiving. That is, the position detecting device 200 includes one transmitting unit and three receiving units.
The position detection device 200 further includes a position detection unit 20 that detects the position of the vehicle 300 based on signals received by the transmission / reception unit 22, the reception unit 23, and the reception unit 24 from the vehicle 300, and the vehicle 300 detected by the position detection unit 20. And a data processing unit 21 that processes information transmitted to and received from the vehicle 300 in order to provide a service requested by the vehicle 300. Here, the service requested by the vehicle 300 is a refueling service.
[0011]
The vehicle 300 is equipped with the vehicle-mounted device 10 and performs wireless communication with the position detection device 200 via the antenna 105 by the DSRC method. The vehicle 300 is an example of a moving object whose position is to be detected. For example, in the charging and settlement system (DSRC settlement), the position of the vehicle 300 is detected, and the service device (for example, refueling) is used by using the identification number (for example, the vehicle-mounted device ID) of the vehicle 300 incorporated in the vehicle-mounted device 10. Machine) to receive a refueling service, and the billing and settlement of the fee can be performed by credit.
[0012]
Next, the internal configuration of the position detection device 200 will be described.
FIG. 2 is a diagram showing the internal configuration of the position detection device 200.
The position detecting device 200 transmits and receives signals to and from the vehicle 300 by using three receiving units and one transmitting unit. Specifically, a first receiving unit (receiving unit 22a) among the plurality of receiving units receives a position detection request signal captured by an antenna 224a located at an arbitrary point as a first position detection request signal.
Similarly, the second receiving unit (receiving unit 23) receives, as a second position detection request signal, a position detection request signal captured by antenna 224b located at a different point from antenna 224a.
Similarly, the third receiving unit (receiving unit 24) receives, as a third position detection request signal, a position detection request signal captured by antenna 224c located at a different point from antennas 224a and 224b.
The above-described position detection request signal is a signal requesting detection of the position of the vehicle 300.
[0013]
The sequence for transmitting the position detection request signal will be described with reference to FIG. At the time of position detection, first, the transmitting unit 22b of the position detection device 200 sends a position detection inquiry signal to the vehicle 300 existing in a predetermined area of the gas station to inquire the vehicle 300 whether the vehicle 300 makes a position detection request. It is transmitted (S10).
On the other hand, the vehicle-mounted device 10 mounted on the vehicle 300 transmits a position detection request signal requesting position detection (S11). Here, since the antenna 224a, the antenna 224b, and the antenna 224c are installed at different places, the time when this position detection request signal reaches each of the receiving units (the receiving unit 22a, the receiving unit 23, and the receiving unit 24) There is a difference. That is, when the position detection request signal transmitted from the vehicle-mounted device 10 is received by a plurality of installed antennas, a delay difference is caused by a difference in distance from the vehicle-mounted device 10 to each antenna (antenna 224a, antenna 224b, and antenna 224c). Received with.
When receiving section 22a receives the position detection request signal, transmitting section 22b receives this signal and transmits a slot assignment signal to vehicle-mounted device 10 of vehicle 300 that has requested position detection.
Here, one of the above-mentioned antennas can be transmitted and received. However, one antenna for transmission and reception and another three reception antennas for position measurement may be provided.
[0014]
The slot assignment signal will be described.
FIG. 4 is a diagram showing the contents of a downlink frame transmitted from the antenna of the position detection device 200 and an uplink frame transmitted from the vehicle-mounted device 10 on the vehicle 300 side.
The downlink frame transmitted from the position detecting device 200 includes FCMS (frame control message slot: FRAME CONTROL MESSAGE SLOT) and MDS (message data slot: MESSAGE DATA SLOT) to which the slot is assigned. The FCMS 39 is a frame control information multiplexing slot, one for one frame, and is always located at the head of the frame. The FCMS 39 includes slot assignment information for assigning a unique slot to each vehicle 300, and is transmitted to the vehicle-mounted device 10 as a slot assignment signal shown in FIG. After transmitting the FCMS 39, the vehicle 300 and the position detecting device 200 communicate with each other in accordance with the slot assigned to each vehicle 300 based on the slot assignment information.
For example, when the position detecting device 200 allocates MDS (1) to the vehicle A and allocates MDS (2) to the vehicle B by the FCMS 39, the transmission and reception between the position detecting device 200 and the vehicle A are performed by the MDS (1) 41. The slot is downlinked and the MDS (1) 50 slot is uplinked. Transmission and reception between the position detecting device 200 and the vehicle B are performed by downlinking the MDS (2) 42 slot and the MDS (2) 51 This is done by uplinking the slots. Thus, communication between the position detecting device 200 and the vehicle A and communication between the position detecting device 200 and the vehicle B are established. The same applies to other slots.
In the uplink, information of radio wave transmission right control is transmitted by an ACTS 53 (activation slot: ACTIVATION SLOT), and actual information is transmitted by slots of MDS (1) 50 to MDS (3) 52.
Therefore, the position detection device 200 performs the position detection process using the signal of the slot of each MDS assigned to each vehicle among the radio waves captured by the position detection antenna.
[0015]
Each slot, which is a block of radio waves shown above, has a pattern of a preamble first, a unique word, and a part for transmitting actual information. The preamble portion secures timing necessary for the receiving circuit to operate in a steady state even when the radio wave is suddenly received.
The next unique word has a specific pattern, and when it is received, it recognizes that it is the beginning of the slot. Since the unique word cannot be received in perfect condition, it is determined that the unique word has been received if a certain degree of correlation is recognized by the circuit that tests the correlation instead of the perfect pattern matching circuit, and then sent. Judge the information as actual information and receive it.
[0016]
Next, the position detection unit 20 in the position detection device 200 shown in FIG. 2 will be described.
The position detection unit 20 determines the position of the vehicle 300 by using the time when each antenna of the position detection device 200 receives the slot signal of each MDS, that is, the time when the information sent after the unique word of the slot is received. To detect.
For example, it is assumed that the vehicle 300 has been assigned the slot of MDS (1) 50 by the position detection device 200. When vehicle 300 transmits a position detection request signal for requesting its own position, signal of MDS (1) 50 is transmitted from vehicle 300 to position detection device 200 by uplink.
Here, the position detection request signal received by the first receiving unit (receiving unit 22a) via the antenna 224a is defined as a first position detection request signal. The position detection request signal received by the second receiving unit (receiving unit 23) via the antenna 224b is defined as a second position detection request signal. Also, the position detection request signal received by the third receiving unit (receiving unit 24) via the antenna 224c is defined as a third position detection request signal. That is, the signal when the information sent after the unique word in the MDS (1) 50 received by the receiving unit 22a is received is a first position detection request signal, and the signal of the MDS (1) 50 received by the receiving unit 23 is The signal when the information sent after the unique word is received is the second position detection request signal, and the signal when the information sent after the unique word is received in the MDS (1) 50 received by the receiver 24 is received. The signal is the third position detection request signal.
[0017]
The position detection unit 20 includes a first position detection request signal received by the first reception unit (reception unit 22a), a second position detection request signal received by the second reception unit (reception unit 23), and a third position detection request signal. The position of the moving object (vehicle 300) is detected from the difference in the reception time from the third position detection request signal received by the receiving unit (receiving unit 24) or the phase difference.
[0018]
Hereinafter, a method of detecting the position of the vehicle 300 from the difference between the reception times will be described.
First, the MDS (1) 50 received by the receiving unit 22a is detected by the unique word detecting unit 25. That is, the unique word detection unit 25 determines that the information transmitted next to the unique word is the first position detection request signal. Similarly, when the receiving unit 23 receives a signal transmitted next to the unique word, the unique word detecting unit 26 determines that the signal is the second position detection request signal. Similarly, when the receiving unit 24 receives a signal transmitted after the unique word, the unique word detecting unit 27 determines that signal as the third position detection request signal.
[0019]
Next, the difference detection unit 28 determines the difference between the reception time of the first position detection request signal and the reception time of the second position detection request signal with reference to the first position detection request signal, and the first position detection request signal. The difference between the reception times of the first and third position detection request signals is calculated. However, the reference need not be the first position detection request signal, and the difference between the reception times may be obtained based on the second position detection request signal or the third position detection request signal.
[0020]
Next, the position determination unit 29 determines the position of the vehicle 300.
FIG. 5 is a diagram showing a procedure in which the position determination unit 29 determines the position of the vehicle 300.
In FIG. 5, the difference between the reception times of the first position detection request signal and the second position detection request signal is d2 (relative reception delay time), the first position detection request signal and the third position detection request signal Is indicated by d3 (relative reception delay time).
[0021]
Hereinafter, a method in which the position determination unit 29 determines the position of the vehicle 300 will be described.
In FIG. 5, the position A (x1, y1) of the antenna 224a, the position B (x2, y2) of the antenna 224b, and the position C (x3, y3) of the antenna 224c are known information. Therefore, the length of L12 and the length of L13 are known.
Since d2 and d3 are the relative reception delay times of the signals received by the antenna 224a and the other antenna, if the propagation speed of the radio wave is a (m / s), the relative reception delay times by the antennas 224b and 224c The distances to d2 and d3 are a × d2 and a × d3, respectively.
[0022]
As shown in the figure, the temporary distance from the vehicle 300 to the antenna 224a is L, the distance L from the position V is set on a straight line from the position V of the vehicle 300 to the position B, and the distance from the position V to the position C is The distance L from the position V is set on the straight line to go.
As shown in FIG. 5, since the portion of the distance indicated by a × d2 starting from the position B and the L portion ahead thereof are connected in a straight line, the position determination unit 29 determines the position V of the vehicle 300 and the position A of the antenna 224a. The position V of the vehicle can be specified based on a triangle (VAB) formed from the position and the position B of the antenna 224b.
Similarly, since the distance portion indicated by a × d3 and the L portion beyond the distance line are connected in a straight line, the position determination unit 29 can specify the position V of the vehicle based on the triangle (VAC). it can.
[0023]
In this case, if the directivity of the antennas 224a, 224b, and 224c is set to 180 degrees at the upper side in FIG. 5, the stop position of the vehicle is not considered to be below the dotted line in FIG. Therefore, in this case, the vehicle 300 existing at the position V and the vehicle existing symmetrically with the position V with respect to the dotted line in FIG. 5 can be distinguished by the directivity of the antenna.
Although the positions of the antennas 224a, 224b, and 224c are drawn in a straight line in FIG. 5, they need not necessarily be on a straight line. The straight line AV connecting the antenna 224a and the vehicle 300 does not need to be orthogonal to the dotted line shown in FIG.
[0024]
Hereinafter, another method in which the position determination unit 29 determines the position of the vehicle 300 will be described with reference to FIG.
Since d2 and d3 shown in FIG. 6 are relative reception delay times with respect to the reception time received by the antenna 224a as in the case shown in FIG. 5, the propagation speed of the radio wave is set to a (m / s), and The distances to the relative reception delay time of the antenna 224b and the antenna 224c are a × d2 and a × d3, respectively.
The provisional distance from the vehicle 300 to the antenna 224a is represented by L, and the distance part indicated by a × d2 and the L part ahead thereof are connected in a straight line, and the distance part indicated by a × d3 and the L part ahead are Connecting in a straight line is the same as in FIG.
[0025]
The position determination unit 29 obtains coordinates on a circumference (an arc centered on B) having a radius a × d2 around the position B of the antenna 224b. In addition, the position determination unit 29 obtains coordinates on a circumference (an arc centered on C) having a radius a × d3 around the position C of the antenna 224c. Further, the position determination unit 29 obtains a circle that is in contact with the circle around B and the circle around C and that passes through the coordinates of the position A of the antenna 224a. The position determination unit 29 specifies the center V of the circle as the position of the vehicle 300 from the obtained circle (an arc centered on V).
[0026]
The position determination unit 29 can also determine the position of the vehicle 300 from the phase difference between the first position detection request signal, the second position detection request signal, and the third position detection request signal described above.
In this case, the difference detection unit 28 detects a difference between the phase of the first position detection request signal, the phase of the second position detection request signal, and the phase of the third position detection request signal. Since the DSRC radio signal has a synchronization frame at the beginning of the frame, the phase difference between the phase of the first position detection request signal and the phase of the second position detection request signal starting from the synchronization frame, and A phase difference between the phase of the first position detection request signal and the phase of the third position detection request signal is calculated.
The position determination unit 29 specifies the position of the vehicle 300 from the plurality of phase differences detected by the difference detection unit 28 by a triangulation method.
[0027]
The upper diagram of FIG. 7 is a diagram in which the gas station is divided into sections 1-1 to 6-3. The refueling machine is No. 1 to No. Up to 6 have been installed.
As described above, the tentative distance L from the vehicle 300 to the antenna 224a set by the position determination unit 29 is, for example, six sections (section 4-1; section 4-2; section 4-3; section 5-3). 1, the section 5-2, the section 5-3), the six center points (center point (4-1), center point (4-2), center point (4-3), center point (5-1) ), The center point (5-2), and the average distance from the center point (5-3)) to the antenna 224a. Further, it can also be obtained by calculating the average of the distances from the 18 center points existing in the 18 sections (sections 1-1 to 6-3) to the antenna 224a.
[0028]
The lower diagram of FIG. 7 is an example of a diagram in which the display unit 30 displays the availability of a refueling machine on a screen.
The display unit 30 displays the position of the vehicle 300 specified by the position determination unit 29.
In FIG. 7, the display unit 30 displays the position of the moving object (vehicle 300) that has requested the position detection as “full”. That is, the position determination unit 29 determines the refueling machine No. in the upper diagram of FIG. Since it is determined that the vehicle 300 is located in the section 2-1 where the vehicle 2 is located, the display unit 30 displays the refueling machine No. 2 is displayed as full. This display may be displayed on a screen installed at a gas station, or may be displayed on a screen of the vehicle-mounted device 10 mounted on a vehicle near the gas station.
For example, when the site of the gas station is vast, the vehicles located in the sections 2-2 and 2-3 in the upper diagram of FIG. Machine can be selected. In addition, based on the availability of the refueling machine, vehicles located in sections 2-2 and 2-3 can be determined to be waiting for refueling, so that advertisements should be displayed for these vehicles or that the vehicles should be washed first. A recommendation may be displayed. Alternatively, grasp the number of queues for each refueling machine, detect the area with a longer queue than other refueling machines, notify the refueling station staff, and the staff will transfer the car to the short-queuing refueling machine. Guidance may be provided.
As described above, the position of the vehicle 300 determined by the position determination unit 29 can be used as information for determining a state in which the vehicle is in a queue to receive refueling.
By using the display as described above, the gas station can provide a more user-friendly service to the user. Further, the user can shorten the refueling time and obtain useful information.
[0029]
The information processing unit 21 shown in FIG. 2 is a unit for calculating the charge related to the credit settlement for the corresponding vehicle 300 based on the position of the vehicle 300 determined by the position determination unit 29 at the time of the charge settlement of the refueling machine 37 providing the refueling service. Is determined as the vehicle 300, and credit settlement is performed on the determined vehicle 300 using wireless communication using DSRC (DEDICATED SHORT RANGE COMMUNICATION).
In wireless communication using DSRC, a roadside wireless communication device (position detection device 200) placed on the store side and each vehicle-mounted device mounted on a plurality of vehicles can simultaneously communicate. Therefore, a person who gets in a car can receive and pay for purchased goods and pay for gasoline refueling while on board, so that a billing settlement system (DSRC settlement) using DSRC (boundary area wireless communication) is convenient. It is expected that the use of this system will be promoted in the future.
[0030]
In the present embodiment, since the position of the vehicle 300 can be specified by the position detection device 200, a service can be supplied to the vehicle 300 whose position has been specified. Therefore, the invention of the present embodiment can be used for many services other than the refueling service, such as a drive-through service and a parking lot parking service.
[0031]
Embodiment 2 FIG.
Hereinafter, Embodiment 2 will be described.
In the present embodiment, the position of the vehicle 300 is detected using an optical method.
FIG. 8 is a diagram illustrating an internal configuration of the position detection device 200 according to the present embodiment.
In the position detection system 100 according to the present embodiment, the wide-angle lens 62 or the wide-angle reflecting mirror 61 is attached to the wide-angle television camera 60, and the photographing unit 70 uses the wide-angle television camera 60 to photograph the position of the vehicle 300 in the gas station.
The position detection unit 71 specifies the position of the vehicle 300 from the signal regarding the vehicle 300 captured by the imaging unit 70, and determines which section in the gas station the stop position is.
The display unit 73 receives the DSRC radio wave transmitted from the vehicle-mounted device 10 mounted on the vehicle 300 and, from the position of the vehicle 300 detected by the position detection unit 71, the position of the vehicle 300 in any of the above sections. Is sampled.
[0032]
The information processing section 72 determines the corresponding vehicle 300 as a charge calculation target vehicle related to credit settlement based on the position of the vehicle 300 determined by the position detection section 71 at the time of the charge settlement of the refueling machine 37 that provides the refueling service. I do.
[0033]
As in the case of the first embodiment, the position of the vehicle 300 determined by the position detection unit 71 can be used as information for determining a state in which the vehicle is in a queue to receive refueling.
Further, similarly to the case of the first embodiment, the invention of the present embodiment can be used for determining the fee related to the credit settlement. Further, the invention of the present embodiment can be used for many services such as a refueling service, a drive-through service, and a parking lot parking service.
In this way, the gas station can provide a more user-friendly service to the user. Further, the user can shorten the refueling time and obtain useful information.
[0034]
The position detecting devices 200 according to all the embodiments described above can be used for a billing and settlement system using DSRC (boundary area wireless communication).
That is, in a DSRC wireless environment where a large number of people access, the position of the vehicle 300 is determined using the function of the position detection device 200, the service target is determined, and a quick service with few queues is provided. A billing and settlement system can be realized.
However, the position detection devices 200 according to all the embodiments described above can also be used for services other than the billing and settlement system using DSRC (boundary area wireless communication).
[0035]
In addition, the position detection devices 200 according to all the embodiments described above can be applied to any scene where a parking lot or a queue is being made, regardless of the gas station. For example, a map of the parking lot is shown on the screen, and the vehicle number of the vehicle 300 parked in the parking lot is displayed at the parked position on the screen. Can be provided. In addition, since the parking lot user can be automatically guided to the empty space of the parking lot, the number of parking lot guiding personnel which has been required can be reduced. In a large parking facility or a parking lot having a complicated three-dimensional structure, it is particularly advantageous to guide a parking lot user to an empty space in the parking lot and reduce the number of personnel.
[0036]
In addition, when using a large parking facility or a three-dimensional complex parking structure, when returning to the parking lot, the user may forget where he parked his car in the parking lot. Often happens. Also in this case, if the identification information (vehicle number or the like) of the vehicle 300 parked in the parking lot is displayed on the screen, it is possible to quickly return to the own vehicle.
[0037]
In addition, the parking device inquires about its own parking position from the WEB server using the mobile device carried by the parking lot user, and the parking position detected by the position detection device 200 in response to the inquiry is transmitted to the parking lot user through the WEB server. By displaying the information on the mobile device carried by the user, the parking lot user can return to his car without hesitation in a vast parking lot or a parking lot having a complicated three-dimensional structure. Since such scenes are frequently encountered in daily life such as a supermarket parking lot and a theme park parking lot, the inventions of all the above-described embodiments are closely related to daily life, and are convenient. It can be used for social life as a high invention.
[0038]
FIG. 9 is a computer basic configuration diagram of the position detection device 200.
9, a CPU 140 that executes a program is connected to a monitor 141, a keyboard 142, a mouse 43, a communication port 44, a magnetic disk device 46, and the like via a bus 38.
The OS 47, the program group 49, and the file group 150 are stored in the magnetic disk device 46. However, an embodiment in which the program group 49 and the file group 150 are integrated to form the object-oriented program group 49 is also considered as one embodiment. For example, the program group 49 stores a program in which an operation performed by the position detection unit 20 for detecting the position of the vehicle 300 is stored, and the CPU 140 and the OS 47 execute the program in which the operation performed by the position detection unit 20 is coded. You.
In each of the above embodiments, the position detection device 200 communicates with the store server 40 and the like using the function of the communication port 44.
[0039]
In all embodiments, each operation of each component is related to each other, and the operation of each component can be replaced as a series of operations while taking into account the relation of the operations described above. Then, by substituting in this way, an embodiment of the method invention can be obtained.
Further, by replacing the operation of each of the above components with the processing of each of the components, an embodiment of a program can be realized.
In addition, by storing the program on a computer-readable recording medium on which the program is recorded, an embodiment of a computer-readable recording medium on which the program is recorded can be provided.
[0040]
The embodiment of the program and the embodiment of the computer-readable recording medium recorded in the program can all be configured by a computer-operable program.
Each process in the embodiment of the program and the embodiment of the computer-readable recording medium on which the program is recorded is executed by the program, and the program is recorded in the recording device, and is transmitted from the recording device to the central processing unit ( CPU) and each program is executed by the central processing unit.
Also, the software and programs of each embodiment may be implemented by firmware stored in a ROM (READ ONLY MEMORY). Alternatively, each function of the above-described program may be realized by a combination of software, firmware, and hardware.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the position of a mobile body can be detected in the range which can communicate by DSRC.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a position detection system according to a first embodiment.
FIG. 2 is an internal configuration diagram of the position detection device 200.
FIG. 3 is a sequence diagram for transmitting a position detection request signal and the like.
FIG. 4 is a diagram showing the contents of a downlink frame and an uplink frame.
FIG. 5 is a diagram showing a position determination procedure performed by a position determination unit 29.
FIG. 6 is a diagram showing another position determination procedure performed by the position determination unit 29.
FIG. 7 is a diagram showing a situation of a gas station.
FIG. 8 is an internal configuration diagram of a position detection device 200 according to the second embodiment.
FIG. 9 is a computer basic configuration diagram of the position detection device 200.
[Explanation of symbols]
2 stores, 3 public networks, 4 management companies, 10 on-board units, 20, 71 position detecting unit, 21, 72 information processing unit, 22 transmitting / receiving unit, 22a, 23, 24 receiving unit, 22b transmitting unit, 25, 26, 27 Unique word detection unit, 28 difference detection unit, 29 position determination unit, 30, 73 display unit, 37 refueling machine, 38 bus, 43 mouse, 44 communication port, 46 magnetic disk device, 47 OS, 49 program group, 60 wide-angle television Camera, 70 shooting unit, 105, 224a, 224b, 224c antenna, 140 CPU, 141 monitor, 142 keyboard, 150 file group.

Claims (8)

A transmitting unit that transmits a position detection inquiry signal for inquiring the presence or absence of a position detection request from the mobile unit to the mobile unit using predetermined wireless communication,
In response to the position detection inquiry signal transmitted by the transmitting unit, a plurality of receiving units that receive a position detection request signal requesting position detection from the mobile body using predetermined wireless communication,
A position detecting unit that detects a position of the moving body from a position detection request signal received by each of the plurality of receiving units. A first receiving unit of the plurality of receiving units receives a position detection request signal captured by an antenna located at point A as a first position detection request signal, and a second receiving unit receives an antenna located at point B Receiving the position detection request signal captured by the antenna as the second position detection request signal, the third receiving unit receives the position detection request signal captured by the antenna located at the point C as the third position detection request signal,
The position detector includes a first position detection request signal received by the first receiver, a second position detection request signal received by the second receiver, and a second position detection request signal received by the third receiver. 3. The position detecting device according to claim 1, wherein the position of the moving object is detected from one of a difference between a reception time and a phase difference with the position detection request signal of No. 3 above. The position detecting device further comprises:
The position detection device according to claim 1, further comprising: a display unit that displays a position of the moving object that has requested the position detection. A shooting unit for shooting a moving object,
A position detection unit that detects the position of the moving object photographed by the photographing unit;
A position detecting device comprising: a transmitting / receiving unit that specifies a moving object from a position of the moving object detected by the position detecting unit, and transmits and receives the specified moving object using predetermined wireless communication. The position detecting device according to claim 1, wherein the position detecting device transmits and receives predetermined information to and from a mobile body by wireless communication using DSRC (DEDICATED SHORT RANGE COMMUNICATION). A transmitting unit that transmits a position detection inquiry signal for inquiring the presence or absence of a position detection request from the mobile unit to the mobile unit using predetermined wireless communication,
In response to the position detection inquiry signal transmitted by the transmitting unit, a plurality of receiving units that receive a position detection request signal requesting position detection from the mobile body using predetermined wireless communication,
A position detection device comprising: a position detection unit that detects a position of the moving body from a position detection request signal received by each of the plurality of reception units.
In response to the position detection inquiry signal transmitted from the transmission unit, a position detection request signal is transmitted using predetermined wireless communication, and a mobile unit that requests the position detection device to detect the position of its own device. Position detection system equipped with. A position detection inquiry signal for inquiring the presence or absence of a position detection request from the mobile body is transmitted to the mobile body using predetermined wireless communication,
In response to the transmitted position detection inquiry signal, a plurality of position detection request signals requesting position detection are received from the mobile using predetermined wireless communication,
A position detecting unit position detecting method for detecting a position of the moving body from the received plurality of position detection request signals. A process of transmitting a position detection inquiry signal for inquiring the presence or absence of a position detection request from the mobile to the mobile using predetermined wireless communication,
In response to the transmitted position detection inquiry signal, a process of receiving a plurality of position detection request signals requesting position detection from the mobile using predetermined wireless communication,
A position detection program for causing a computer to execute a process of detecting the position of the moving object from the received plurality of position detection request signals.

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