JP3872695B2 - In-vehicle device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle device mounted on a vehicle such as an automobile, and more particularly to an in-vehicle device that receives a plurality of media.
[0002]
[Prior art]
The traffic information peculiar to the installation position of the beacon is transmitted from the beacon installed on the roadside, and the traveling vehicle receives this and displays the information on the in-vehicle display device, so that the driver can easily obtain traffic information. A beacon system that can be known is being developed nationwide. The beacons installed on the roadside are divided into radio beacons that provide traffic information using radio waves and optical beacons that provide traffic information using infrared rays. The optical beacon is usually arranged on a general road.
[0003]
On the other hand, a technique for measuring the position of the own vehicle using radio waves from a GPS (Global Positioning System) satellite has become widespread. By displaying the current position of the vehicle obtained by GPS on the in-vehicle display device, the driver can easily grasp the position of the vehicle.
[0004]
In addition, ETCS (Electric Toll Collection System), which has a transmission / reception device at a toll gate on a toll road and collects tolls by DSRC communication with a vehicle passing through the toll gate, has entered a practical stage.
[0005]
[Problems to be solved by the invention]
In order to use optical beacons, radio beacons, GPS, and ETCS, dedicated receiving devices are required. In order to arrange these in a narrow vehicle compartment, it is preferable to organize and share the hardware as much as possible to reduce the size as a whole. Accordingly, there is an in-vehicle device in which some of optical beacons, radio beacons, GPS and ETCS receivers are housed in one casing.
[0006]
In particular, when radio wave beacons other than optical beacons, GPS and ETCS receivers are integrated, sharing the high-frequency oscillation circuit that oscillates the high-frequency of the quasi-microwave band included in each device contributes to downsizing of the entire device To do.
[0007]
However, since each receiving device operates in a different frequency band, if the high-frequency oscillation circuit is shared, the receiving devices sharing the same cannot operate simultaneously.
[0008]
Accordingly, an object of the present invention is to provide a technique for switching a destination of a high-frequency oscillation signal in an in-vehicle device in which a plurality of reception devices share a high-frequency oscillation circuit.
[0009]
[Means for Solving the Problems]
An in-vehicle device for mounting on a vehicle according to one aspect of the present invention includes an ETC transmission / reception unit that communicates with an ETC roadside device provided at a toll gate on a toll road, and a signal transmitted from a radio beacon installed on the roadside A radio wave beacon receiving unit for receiving a signal, a high frequency oscillation unit for generating a high frequency oscillation signal, and an oscillation signal generated by the high frequency oscillation unit for supplying to either the ETC transmission / reception unit or the radio wave beacon reception unit A switch that performs switching, and a determination unit that determines whether or not the switch performs the switching.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a block configuration diagram of an in-vehicle device according to a first embodiment of the present invention. The in-vehicle device according to the present embodiment includes a navigation device 16, an inter-vehicle radar 14 that detects a distance from the preceding vehicle, a vehicle speed sensor 15, a camera 21 that captures the front of the vehicle, and an image captured by the camera. The image processing apparatus 22 to process and the display apparatus 17 which displays the information etc. for providing to a driver | operator etc. which the navigation apparatus 16 output are provided. The navigation device 16 is realized by integrating an ETC transmission / reception device, a radio wave beacon reception device, and a GPS reception device into one housing, for example.
[0012]
The navigation device 16 includes an ETC antenna 1 that transmits / receives information to / from an ETC roadside device, an ETC transmission / reception unit 2 that includes an ETC signal transmission / reception circuit, and an ETC signal processing unit 3 that oscillates and processes transmission / reception signals. A beacon signal receiving antenna 4, a beacon receiving unit 5 for receiving the received beacon signal, a beacon signal processing unit 6 for processing the beacon signal, a high-frequency switch 7 for switching the output of the local oscillation circuit unit, and local oscillation A high-frequency oscillation unit 8 that oscillates a signal, a PLL control unit 9 that performs frequency control of a local oscillation signal, a switching control unit 10 that performs beacon / ETC selection control, and detects that a toll gate is within a predetermined range Tollgate detection unit 11, GPS antenna 12, map information 13 used in the navigation system, and the current position of the vehicle by GPS Exit to and a current position detection unit 18.
[0013]
The map information 13, the current position detection unit 18, the inter-vehicle radar 14, the vehicle speed sensor 15, the camera 21, and the image processing unit device 22 can be omitted if not necessary.
[0014]
The ETC transmission / reception unit 2 transmits / receives information to / from an ETC roadside device disposed at a toll gate on a toll road via the ETC antenna 1. At this time, transmission / reception between the ETC transmission / reception unit 2 and the ETC roadside device uses a carrier wave of 5 GHz band.
[0015]
The ETC signal processing unit 3 performs signal processing such as security processing of the transmission / reception data.
[0016]
The beacon receiving unit 5 receives beacon information transmitted from roadside radio beacons via the beacon antenna 4. At this time, the beacon information is subjected to AM modulation of GMSK and modulation signal 1 kHz on a sub-microwave carrier.
[0017]
The radio beacon signal processing unit 6 performs demodulation and data processing of the beacon information. For example, signal processing such as reproduction of a synchronization signal and descrambling is performed.
[0018]
The high frequency oscillating unit 8 generates a high frequency oscillation signal in a frequency band instructed by the PLL control unit 9. For example, the high-frequency oscillator 8 generates a local oscillation signal in a frequency band in which the ETC transceiver 2 and the beacon receiver 5 operate. Then, a local oscillation signal having a frequency band suitable for each of the ETC transmission / reception unit 2 and the beacon reception unit 5 is supplied. Therefore, the ETC transmission / reception unit 2 and the beacon receiving unit 5 operate while receiving the local oscillation signal, and do not operate when receiving the local oscillation signal.
[0019]
The high frequency switch 7 performs switching for outputting the local oscillation signal generated by the high frequency oscillation unit 8 to either the ETC transmission / reception unit 2 or the beacon reception unit 5. This switching is performed near the toll gate and under the control of the switching control unit 10. The toll gate detection unit 11 performs toll gate detection based on the map information 13, the inter-vehicle radar 14, the vehicle speed sensor 15 or the output of the image processing device 22 or the like.
[0020]
The toll gate detection unit 11 detects that the own vehicle has come to the vicinity of the toll gate based on the various information as described above. Conditions for detecting the vicinity of the toll gate will be described later.
[0021]
The switching control unit 10 selects either the ETC transmission / reception unit 2 or the beacon reception unit 5 and instructs to generate and supply a local oscillation signal suitable for the selected one.
[0022]
For example, during normal travel, the beacon receiving unit 5 is selected, and the PLL control unit 9 and the high frequency switch 7 are notified of that fact. The PLL control unit 9 sets the frequency to the local oscillation signal (generally 2 GHz band) of the beacon receiving unit 5. The high frequency switch 7 is set so as to output the local oscillation signal to the beacon receiving unit 5. As a result, the beacon receiving unit 5 operates and enters a standby state for reception from the beacon roadside machine (beacon mode). At this time, if the vehicle receives beacon information during normal driving, the information can be displayed on the display unit 17 at any time.
[0023]
When the toll booth detection unit 11 detects that the vehicle has approached the toll booth, the switching control unit 10 selects the ETC transmission / reception unit 2 and notifies the PLL control unit 9 and the high frequency switch 7 to that effect. The PLL control unit 9 tunes the frequency to a reception local oscillation signal (generally, a 5 GHz band) of the ETC transmission / reception unit 2. The high frequency switch 7 is set to output a local oscillation signal to the ETC transmission / reception unit 2. Thereby, the ETC transmission / reception part 2 will be in the state which can transmit / receive an ETC signal (ETC mode). At this time, when the toll gate information is received from the ETC roadside machine, the PLL control unit 9 performs transmission / reception switching of the local oscillation signal in accordance with a series of transmission / reception operations, and the vehicle can pass through the toll gate. When the vehicle passes the toll gate, the switching control unit 10 switches from the ETC mode to the beacon mode again.
[0024]
The inter-vehicle radar 14 measures an inter-vehicle distance between a vehicle traveling ahead or a roadside fixed object. When there is a vehicle ahead, the toll gate detection unit 11 is notified of the distance between the vehicles, and when there is no vehicle ahead, the distance to the fixed object on the road side is notified.
[0025]
The vehicle speed sensor 15 detects the speed of the host vehicle and notifies the charge detection unit 11 of it.
[0026]
The image processing device 21 analyzes an image captured by the camera 22. For example, the image processing apparatus 21 recognizes a specific symbol mark such as a white line drawn on the road or a sign by image processing. The image processing device 21 notifies the charge detection unit 11 of information regarding the presence or absence of white lines or symbol marks.
[0027]
Next, a procedure for switching between the beacon mode and the ETC mode in the in-vehicle device according to the present embodiment will be described with reference to FIG.
[0028]
When the vehicle-mounted device is turned on, a local oscillation signal is supplied to the beacon receiving unit 5 and the vehicle-mounted device starts operation in the beacon mode. At this time, the beacon receiving unit 5 waits to receive a signal from the beacon roadside machine (S11), and executes a predetermined process when receiving the beacon signal (S21). The toll gate detection unit 11 checks whether or not the own vehicle has come to the vicinity of the toll gate when waiting for reception (S12). Specific criteria for determining whether or not the toll gate is in the vicinity will be described later.
[0029]
When it is determined that the host vehicle is in the vicinity of the toll gate (S12: Yes), the switching control unit 10 controls the PLL control unit 9 and the high frequency switch 7 to switch to the ETC mode (S13). And the ETC transmission / reception part 2 transmits / receives predetermined information with an ETC roadside machine (S14). When it is completed, the switching control unit 10 switches to the beacon mode again and repeats the processes after step S11 (S15).
[0030]
Next, a specific example of the determination criterion in step S12 for determining whether or not the own vehicle is in the vicinity of the toll gate will be described with reference to FIGS.
[0031]
The first criterion will be described with reference to FIG. Here, it is assumed that the map information 13 includes location information of a toll booth where the ETC gate is located.
[0032]
First, the toll gate detection unit 11 determines whether or not the vehicle speed of the host vehicle that has received the notification from the vehicle speed sensor 15 is equal to or lower than a predetermined speed (S31). If the speed of the host vehicle is equal to or lower than the predetermined value, it is determined whether the host vehicle is within a predetermined distance from the toll gate based on the current position and the map information (S32). When the own vehicle is within a predetermined distance from the toll gate, it is determined that the own vehicle is in the vicinity of the toll gate (S33).
[0033]
Note that the speed determination in step S31 can be omitted. That is, it is determined whether or not the distance between the vehicle and the toll gate is less than a predetermined distance from the current position of the vehicle and the map information. If the distance is less than the predetermined distance, the beacon mode is switched to the ETC mode. I do.
[0034]
The second determination criterion will be described with reference to FIG. Here, it is assumed that the beacon information transmitted from the beacon roadside machine near the toll gate includes information indicating the vicinity of the toll gate (for example, the distance to the toll gate).
[0035]
The toll gate detection unit 11 determines whether or not the vehicle speed of the host vehicle that has received the notification from the vehicle speed sensor 15 is equal to or lower than a predetermined speed (S41). If the speed of the host vehicle is less than or equal to the predetermined value, it is determined whether toll information is included in the beacon information (S42). When the toll gate information is included in the beacon information, it is determined that the vehicle is near the toll gate (S43).
[0036]
Note that the speed determination in step S41 can be omitted. That is, it is determined whether or not the distance between the own vehicle and the toll gate is equal to or less than a predetermined distance from the current position of the own vehicle and information indicating the position of the toll gate included in the beacon information. If it is, the beacon mode is switched to the ETC mode.
[0037]
The third criterion will be described with reference to FIG. Here, we focused on the fact that there is no white line near the toll booth to separate the diagonal lines.
[0038]
The toll gate detection unit 11 determines whether or not the vehicle speed of the host vehicle that has received the notification from the vehicle speed sensor 15 is equal to or lower than a predetermined speed (S51). When the speed of the own vehicle is equal to or lower than the predetermined value, when the information regarding the presence or absence of the white line notified from the image processing device 21 indicates that there is no white line on the road, it is determined that the own vehicle is near the toll gate (S53). .
[0039]
Note that the speed determination in step S51 can be omitted. That is, when the toll gate detection unit 11 receives information indicating that there is no white line on the road ahead of the host vehicle, which is reflected in the image taken by the camera 22, from the image processing device 21, the host vehicle and the toll gate Is determined to be less than or equal to a predetermined distance, and the beacon mode is switched to the ETC mode.
[0040]
The fourth criterion will be described with reference to FIG. Here, it is assumed that a sign of a predetermined symbol mark is set up near the toll booth.
[0041]
The toll gate detection unit 11 determines whether or not the vehicle speed of the host vehicle that has received the notification from the vehicle speed sensor 15 is equal to or lower than a predetermined speed (S61). When the speed of the own vehicle is equal to or lower than the predetermined value, when the information regarding the presence or absence of the symbol mark notified from the image processing device 21 indicates that the symbol mark has been detected, it is determined that the own vehicle is in the vicinity of the toll gate (S63). ).
[0042]
Note that the speed determination in step S61 can be omitted. That is, when the toll gate detection unit 11 receives information indicating that a symbol mark indicating a toll gate on the toll road is included in the image captured by the camera 22 from the image processing device 21, the vehicle and the toll It is determined that the distance to the place is equal to or less than a predetermined distance, and the beacon mode is switched to the ETC mode.
[0043]
The fifth criterion will be described with reference to FIG.
[0044]
The toll gate detection unit 11 determines whether the distance between the inter-vehicle radar 14 and the fixed object on the roadside is equal to or less than a predetermined distance (S71). If the distance between the vehicle and the roadside object is equal to or smaller than the predetermined value, it is determined whether the vehicle is within a predetermined distance from the toll gate based on the current position and the map information (S72). In this case, when the own vehicle is within a predetermined distance from the toll gate, the roadside fixed object is highly likely to be a toll gate, and it is determined that the own vehicle is in the vicinity of the toll gate (S73).
[0045]
When the toll gate position is determined from the position information measured by GPS and the map information, there are many cases where it is not possible to distinguish between cases where the vehicle is traveling on the viaduct and under the viaduct. Therefore, in the present embodiment, when the current position information and map information are used, other information is also used in combination, so that the top and bottom of the viaduct can be easily distinguished.
[0046]
After the switching control unit 10 switches to the ETC mode, when the ETC transmission / reception unit 2 completes the transmission / reception of the ETC information, the mode is returned to the beacon mode. In addition, when the switching control unit 10 switches to the ETC mode but is not actually in the vicinity of the toll booth or when the vehicle does not pass the ETC gate, the ETC transmission / reception unit 2 transmits / receives the ETC information. Absent. At this time, after the switching control unit 10 switches to the ETC mode, it returns to the beacon mode after a predetermined time has elapsed.
[0047]
In addition, each condition used in each of the above determination criteria can be arbitrarily combined. In each of the above criteria, the vehicle speed is checked first (S31, S41, S51, S61). This is performed after the other checks (S32, S42, S52, S62). Also good.
[0048]
Next, a second embodiment of the present invention will be described. In the present embodiment, the GPS reception unit and the ETC transmission / reception unit share the high-frequency oscillation unit under the control of the switching control unit. The block diagram of the vehicle-mounted apparatus of this embodiment is shown in FIG.
[0049]
In this embodiment, a GPS receiver 19 for receiving GPS signals from satellites is provided. The GPS signal received by the GPS receiver 19 is notified to the current position detector 18. The current position detector 18 analyzes the GPS signal and extracts current position information. As in the first embodiment, the switching control unit 10 determines which of the ETC transmission / reception unit 2 and the GPS reception unit 19 is supplied with the local oscillation signal generated by the high-frequency oscillation unit 8.
[0050]
In the present embodiment, a high-frequency oscillation unit (not shown) may be provided for the beacon receiving unit. Even when a roadside beacon is arranged immediately before the toll gate, beacon information can be received.
[0051]
As described above, in the above embodiment, a single high-frequency oscillation unit is shared by a plurality of media receivers, so that the circuit can be simplified, reduced in size, and reduced in cost.
[0052]
The above-described embodiments of the present invention are examples for explaining the present invention, and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the present invention in various other modes without departing from the gist of the present invention.
[0053]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, it can operate | move by switching the provision destination of a high frequency oscillation signal with the vehicle-mounted apparatus with which the some receiving apparatus shared the high frequency oscillation circuit.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an in-vehicle device according to a first embodiment to which the present invention is applied.
FIG. 2 is a flowchart showing a procedure for switching between a beacon mode and an ETC mode.
FIG. 3 is a flowchart showing a first determination criterion for determining whether the vehicle is in the vicinity of a toll booth.
FIG. 4 is a flowchart illustrating a second determination criterion for determining whether the vehicle is in the vicinity of a toll booth.
FIG. 5 is a flowchart showing a third determination criterion for determining whether the vehicle is in the vicinity of a toll booth.
FIG. 6 is a flowchart showing a fourth determination criterion for determining whether the vehicle is in the vicinity of a toll booth.
FIG. 7 is a flowchart showing a fifth determination criterion for determining whether the vehicle is in the vicinity of a toll booth.
FIG. 8 is a configuration diagram of an in-vehicle device according to a second embodiment to which the present invention is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... ETC antenna, 2 ... ETC transmission / reception part, 3 ... ETC signal processing part, 4 ... Beacon antenna, 5 ... Beacon reception part, 6 ... Beacon signal processing part, 7 ... High frequency switch, 8 ... High frequency oscillation part, 9 ... PLL Control unit, 10 ... switching control unit, 11 ... toll booth detection unit, 12 ... GPS antenna, 13 ... map information unit, 14 ... inter-vehicle radar, 15 ... vehicle speed sensor, 16 ... navigation device, 17 ... display unit, 18 ... present Position detecting unit, 19 ... GPS receiving unit, 21 ... image processing unit, 22 ... camera.

Claims (10)

An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A radio beacon receiver that receives signals transmitted from radio beacons installed on the roadside;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the radio beacon reception unit;
A determination unit that determines whether or not the switch performs the switching,
The determination unit, when the speed of the vehicle acquired from a vehicle speed sensor is equal to or lower than a predetermined value , based on map information including a current position of the vehicle and a position of a toll gate on the toll road, And whether or not the distance is less than or equal to a predetermined distance,
The switch switches to supply the oscillation signal to the ETC transmission / reception unit when the distance between the vehicle and the toll gate is equal to or less than a predetermined distance, and further supplies the oscillation signal to the ETC transmission / reception unit. after switching manner that, given when time-vehicle device, characterized in that switch between to supply the oscillation signal is supplied to the ETC transceiver to the radio beacon receiver. An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A radio beacon receiver that receives signals transmitted from radio beacons installed on the roadside;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the radio beacon reception unit;
A determination unit that determines whether or not the switch performs the switching,
When the speed of the vehicle acquired from the vehicle speed sensor is equal to or lower than a predetermined value , the determination unit is based on the current position of the vehicle and information indicating the position of the toll gate on the toll road received by the beacon receiving unit, Determining whether a distance between the vehicle and the toll gate is a predetermined distance or less;
The switch switches to supply the oscillation signal to the ETC transmission / reception unit when the distance between the vehicle and the toll gate is equal to or less than a predetermined distance, and further supplies the oscillation signal to the ETC transmission / reception unit. after switching manner that, given when time-vehicle device, characterized in that switch between to supply the oscillation signal is supplied to the ETC transceiver to the radio beacon receiver. An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A radio beacon receiver that receives signals transmitted from radio beacons installed on the roadside;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the radio beacon reception unit;
A determination unit that determines whether or not the switch performs the switching,
When receiving information indicating that there is no white line on the road ahead of the vehicle, which is reflected in the image taken by the in-vehicle camera, the determination unit is configured such that the distance between the vehicle and the toll gate is equal to or less than a predetermined distance. Judge that there is,
The switch is configured to switch the switch so as to supply the oscillation signal to the ETC transmitter / receiver when a distance between the vehicle and the toll gate is equal to or less than a predetermined distance. The in-vehicle device according to claim 3,
The switch is configured to supply the oscillation signal supplied to the ETC transmission / reception unit to the radio beacon reception unit when a predetermined time has elapsed after switching to supply the oscillation signal to the ETC transmission / reception unit. In-vehicle device characterized by switching to An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A radio beacon receiver that receives signals transmitted from radio beacons installed on the roadside;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the radio beacon reception unit;
A determination unit that determines whether or not the switch performs the switching,
The determination unit acquires an image captured by the in-vehicle camera when the vehicle speed acquired from the vehicle speed sensor is equal to or less than a predetermined value, and the acquired image includes a symbol mark indicating a toll gate on the toll road. If it is determined that the distance between the vehicle and the toll gate is a predetermined distance or less,
The switch switches to supply the oscillation signal to the ETC transmission / reception unit when the distance between the vehicle and the toll gate is equal to or less than a predetermined distance, and further supplies the oscillation signal to the ETC transmission / reception unit. after switching manner that, given when time-vehicle device, characterized in that switch between to supply the oscillation signal is supplied to the ETC transceiver to the radio beacon receiver. An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A GPS receiver for receiving signals from GPS satellites;
A current position detecting unit for obtaining a current position of the vehicle using a signal received by the GPS receiving unit;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the GPS reception unit;
A determination unit that determines whether or not the switch performs the switching,
When the speed of the vehicle acquired from a vehicle speed sensor is equal to or lower than a predetermined value, the determination unit determines the vehicle and the vehicle based on the obtained current position of the vehicle and map information including a toll road toll gate position. Determine whether the distance to the toll gate is less than or equal to the predetermined distance,
The switch switches to supply the oscillation signal to the ETC transmission / reception unit when the distance between the vehicle and the toll gate is equal to or less than a predetermined distance, and further supplies the oscillation signal to the ETC transmission / reception unit. after switching manner that, given when time, vehicle device said oscillation signal is supplied to the ETC transceiver, characterized in that the switch between to supply to the GPS receiver. An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A GPS receiver for receiving signals from GPS satellites;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the GPS reception unit;
A determination unit that determines whether or not the switch performs the switching,
When receiving information indicating that there is no white line on the road ahead of the vehicle, which is reflected in the image taken by the in-vehicle camera, the determination unit is configured such that the distance between the vehicle and the toll gate is equal to or less than a predetermined distance. Judge that there is,
The switch is configured to switch the switch so as to supply the oscillation signal to the ETC transmitter / receiver when a distance between the vehicle and the toll gate is equal to or less than a predetermined distance. The in-vehicle device according to claim 7,
The switch is configured to supply the oscillation signal supplied to the ETC transmission / reception unit to the GPS reception unit when a predetermined time has elapsed after switching to supply the oscillation signal to the ETC transmission / reception unit. An in-vehicle device characterized by switching. An in-vehicle device for mounting on a vehicle,
An ETC transmission / reception unit that communicates with an ETC roadside device installed at a toll gate on a toll road;
A GPS receiver for receiving signals from GPS satellites;
A high-frequency oscillation section for generating a high-frequency oscillation signal;
A switch for switching to supply an oscillation signal generated by the high-frequency oscillation unit to either the ETC transmission / reception unit or the GPS reception unit;
A determination unit that determines whether or not the switch performs the switching,
The determination unit acquires an image captured by an in-vehicle camera when the vehicle speed acquired from a vehicle speed sensor is equal to or lower than a predetermined value, and the acquired image includes a symbol mark indicating a toll gate on the toll road. If it is determined that the distance between the vehicle and the toll gate is a predetermined distance or less,
The switch switches to supply the oscillation signal to the ETC transmission / reception unit when the distance between the vehicle and the toll gate is equal to or less than a predetermined distance, and further supplies the oscillation signal to the ETC transmission / reception unit. after switching manner that, given when time, vehicle device said oscillation signal is supplied to the ETC transceiver, characterized in that the switch between to supply to the GPS receiver. The determination unit further acquires the speed of the vehicle from a vehicle speed sensor, and uses the image taken by the in-vehicle camera when the speed of the vehicle is equal to or less than a predetermined value, to determine the distance between the vehicle and the toll gate The in-vehicle device according to any one of claims 3, 4, 7, and 8 , wherein it is determined whether or not is less than a predetermined distance .

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