JP2006256467A - Vehicle monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle monitoring device capable of easily and certainly setting a monitoring mode and preventing theft. <P>SOLUTION: The vehicle monitoring device 100 comprises a TPMS signal receiver (A monitoring signal receiving means) 4 receiving a TPMS signal sent from a TPMS13 of a monitoring target vehicle (hereafter, indicated as a vehicle) 1; a key-less signal receiver (a key-less signal receiving means) 3; an alarm generator (an alarm generating means) 9 issuing alarm sound when the vehicle 1 encounters theft; an alarm reporting device (a theft reporting means) 7 reporting that the vehicle 1 encounters the theft to the outside; an alarm generator 9 on the basis of a signal received by the key-less signal receiver 3 and the TPMS signal receiver 4; a signal processing portion (a controlling means) 8 controlling the alarm reporting device 7; and a battery 11 which is a power source of the vehicle monitoring device 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle monitoring apparatus, and more particularly to a vehicle monitoring apparatus that generates an alarm to prevent the vehicle from being stolen by detecting that a monitored vehicle has moved a predetermined distance during a monitoring mode.

Conventionally, various methods have been tried to prevent theft of vehicles, particularly automobiles. For example, when the door lock is opened from the outside, an alarm sound is generated by a sensor attached to the door, or a vibration sensor is installed in the vehicle to detect the vibration when the vehicle is moved and generate an alarm. There is something to emit.
Patent Document 1 discloses a base station device that communicates with a transmission / reception device mounted on a vehicle in a state where the vehicle is parked or stopped at a predetermined position as a conventional technology for preventing vehicle theft, and through the base station device, A vehicle theft prevention device is disclosed that includes a management device that determines abnormal movement of a vehicle from a predetermined position based on identification information transmitted from a transmission / reception device and outputs the result.
Moreover, in patent document 2, the vehicle stop is provided in the floor part of a parking location, and the wheel of a vehicle is stopped. The vehicle stop is provided with a vehicle detector, and infrared rays are emitted upward from the transmission unit, and the light reflected by the vehicle is received by the reception unit, thereby detecting the inventory of the vehicle. An automobile theft detection device is disclosed in which an alarm signal is output when a vehicle moves after an operation is started by a key switch unit, and an alarm is generated from a speaker or a warning light.
JP 2002-197575 A JP-A-8-167081

However, when the conventional monitoring device forgets to set, for example, a door sensor or a vibration sensor and does not enter the monitoring state, it does not make sense to attach the monitoring device at all. Moreover, when a regular user uses it, it is necessary to cancel the set each time, and there is a problem that the operation is troublesome.
The prior art disclosed in Patent Document 1 detects the presence or absence of a vehicle using a metal sensor or an ultrasonic sensor. Since the operation is started by a vehicle stop switch, the vehicle stop switch must be operated. There is. Further, if each sensor is operated by a pseudo method, there is a possibility that theft cannot be prevented.
The prior art disclosed in Patent Document 2 is equipped with two transceivers in a vehicle, one for communication with an antenna installed in a parking lot, and the other on a parking lot ground or a car stop. This is a monitoring system for communication with an installed antenna and having two communication methods. In this method, it is necessary to mount two transceivers on the vehicle side, which increases the cost. In addition, since only the antenna is mounted on the ground or the vehicle stop, the signal loss increases between the transmission paths to the base station, and it is necessary to increase the transmission power and reception sensitivity of the vehicle-side transceiver. That is, the burden on the vehicle driven by the battery is heavy, and there is a risk that the battery will be consumed significantly during parking. Further, since the alarm means is located at a position away from the vehicle, it is not possible to alert the surroundings and the effect of preventing theft in advance is weak.
In view of such problems, the present invention includes a vehicle monitoring device for stopping a vehicle to be monitored, and automatically sets a monitoring mode by a normal parking operation by controlling an alarm generation unit based on a monitoring signal and a keyless signal. In addition, a vehicle monitoring device is provided that can easily and reliably set the monitoring mode and prevent theft by generating an alarm sound when it is detected that the monitoring signal is not received during the monitoring mode. For the purpose.

In order to solve this problem, the present invention provides a vehicle monitoring apparatus for preventing theft of a vehicle, the monitoring signal receiving means for receiving a monitoring signal transmitted from the monitoring target vehicle, and the monitoring target A keyless signal receiving means for receiving a signal transmitted by a keyless entry of the monitored vehicle when the vehicle door lock is released; an alarm generating means for generating an alarm sound when the monitored vehicle encounters theft; Control means for controlling the alarm generating means based on signals received by the monitoring signal receiving means and the keyless signal receiving means, and the control means is transmitted from the monitoring target vehicle by the monitoring signal receiving means. The monitoring mode is entered by receiving the monitoring signal, and the monitoring signal receiving means receives the monitoring signal during the monitoring mode. When the absence is detected, the alarm generating means is controlled to generate an alarm sound.
The control means of the present invention determines that the monitoring target vehicle has not been moved from the proper place while the monitoring signal transmitted from the monitoring target vehicle is being accurately received. This state is called a monitoring mode. If the monitoring signal cannot be received during the monitoring mode, it is determined that the monitored vehicle has been moved from the proper place, and an alarm is generated.
Claim 2 is a vehicle monitoring device for preventing theft of a vehicle, wherein the monitoring signal receiving means for receiving the monitoring signal transmitted from the monitored vehicle, and when the door lock of the monitored vehicle is released, Keyless signal receiving means for receiving a signal transmitted by keyless entry of a monitored vehicle, a theft reporting means for reporting to the outside that the monitored vehicle has been stolen, the monitoring signal receiving means and the keyless signal receiving means Control means for controlling the theft reporting means based on the signal received by the control means, wherein the control means enters the monitoring mode by receiving a monitoring signal transmitted from the monitored vehicle by the monitoring signal receiving means. When the monitoring signal receiving means detects that the monitoring signal is not received during the monitoring mode, the monitored vehicle is stolen. Controlling the theft unit to report that it has even-outside characterized.
The control means of the present invention determines that the monitoring target vehicle has not been moved from the proper place while the monitoring signal transmitted from the monitoring target vehicle is being accurately received. This state is called a monitoring mode. When the monitoring signal cannot be received during the monitoring mode, it is determined that the monitoring target vehicle has been moved from the proper place, and the fact that the monitoring target vehicle has been stolen is reported to the outside.

Claim 3 is a vehicle monitoring device for preventing theft of the vehicle, wherein the monitoring signal receiving means for receiving the monitoring signal transmitted from the monitored vehicle, and when the door lock of the monitored vehicle is released, Keyless signal receiving means for receiving a signal transmitted by keyless entry of a monitored vehicle, alarm generating means for generating an alarm sound when the monitored vehicle encounters theft, and the fact that the monitored vehicle has been stolen A theft reporting means for reporting to the outside, and a control means for controlling the alarm generating means and the theft reporting means based on the signals received by the monitoring signal receiving means and the keyless signal receiving means, By receiving a monitoring signal transmitted from the monitored vehicle by the monitoring signal receiving means, the mode shifts to the monitoring mode, and the monitoring mode is set. When the monitoring signal receiving means detects that the monitoring signal is not received, the alarm generating means is controlled so as to generate an alarm sound, and the outside is informed that the monitored vehicle has been stolen. The theft reporting means is controlled as described above.
The control means of the present invention determines that the monitoring target vehicle has not been moved from the proper place while the monitoring signal transmitted from the monitoring target vehicle is being accurately received. This state is called a monitoring mode. If the monitoring signal cannot be received during this monitoring mode, it is determined that the monitored vehicle has been moved from the proper location, an alarm is generated, and the fact that the monitored vehicle has been stolen is reported to the outside. is there.
According to a fourth aspect of the present invention, the control means detects that the signal transmitted from the keyless entry during the monitoring mode is received by the keyless signal receiving means, and that the monitoring signal receiving means does not receive the monitoring signal. In this case, the vehicle shifts to a non-monitoring mode in which the monitored vehicle is not monitored.
In the monitoring mode, the monitoring signal and the keyless signal are alternately monitored. That is, if the monitoring signal is received and the keyless signal is not received, it is determined that the monitoring target vehicle is parked in the normal position while the door of the monitoring target vehicle is closed, and the monitoring mode is in progress. When the monitoring signal is received and the keyless signal is received, it is determined that the authorized user has unlocked and boarded the door of the monitoring target vehicle. It is assumed that the vehicle has moved from the parking lot and shifts to the non-monitoring mode.

According to a fifth aspect of the present invention, the monitoring signal is a TPMS signal transmitted from a tire pressure monitoring system that monitors a tire pressure of the monitored vehicle.
Basically, the monitoring signal may be any signal as long as it is a signal transmitted from the monitored vehicle. However, considering cost effectiveness, it is preferable that the burden on the user is as light as possible by not providing a new transmitter. Therefore, in the present invention, a TPMS signal transmitted from a tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) scheduled to be required by law in the future is used.
According to a sixth aspect of the present invention, at least the monitoring signal receiving means, the keyless signal receiving means, the alarm generating means, the theft reporting means, and the control means are incorporated in a car stop of a parking lot.
The vehicle monitoring device of the present invention needs to confirm that the monitoring target vehicle is surely parked at a predetermined position in the parking lot. The parking lot is provided with a car stop for stopping the wheels so that the vehicle does not deviate from a predetermined position. The present invention incorporates a device necessary for the vehicle stop using the vehicle stop.
According to a seventh aspect of the present invention, a communicable distance between the monitoring signal receiving unit and the monitoring signal transmitted from the monitoring target vehicle is at least equal to or larger than a diameter of a wheel of the monitoring target vehicle.
When the vehicle monitoring device of the present invention is built in the vehicle stop, the sensitivity increases as the possible communication distance with the monitoring signal transmitted from the monitored vehicle is shortened. However, too high sensitivity may cause malfunction. Further, when a TPMS signal is used as a monitoring signal, the transmission source is often provided near the air inlet of the tire. Accordingly, the farthest distance between the car stop and the transmission source is when the air inlet and the car stop are separated from each other by the tire diameter. Therefore, it is necessary to make the distance at least a distance greater than the diameter of the tire as a communicable distance.
An eighth aspect of the present invention is characterized in that the theft reporting means can report to the outside by wire or wireless.
The theft reporting means communicates to the reporting means at a location away from the parking lot by means of voice or text. If it is a short distance, it may be performed by wire, but if it is a long distance, the cost may be reduced by wireless transmission.

According to the first aspect of the present invention, when the monitoring signal transmitted from the monitoring target vehicle is received by the monitoring signal receiving means, the mode shifts to the monitoring mode. Since it is determined that the vehicle has been moved from the proper place and an alarm is generated, it is possible not only to immediately detect the movement of the vehicle, but also to alarm the surroundings with an alarm sound to prevent theft.
Further, in the second aspect, when the monitoring signal is transmitted from the monitoring target vehicle by the monitoring signal receiving means to shift to the monitoring mode, and the monitoring signal cannot be received during the monitoring mode, the monitoring target vehicle is properly registered. Since it is judged that the vehicle has been moved from the place and the monitored vehicle has been found to have been stolen, not only the vehicle movement can be immediately detected but also the security personnel can be notified promptly. .
Further, according to the third aspect, when the monitoring signal is transmitted from the monitoring target vehicle by the monitoring signal receiving means to shift to the monitoring mode, and the monitoring signal cannot be received during the monitoring mode, the monitoring target vehicle is properly registered. An alarm is generated when it is determined that the vehicle has been moved from the location, and the fact that the monitored vehicle has been stolen is reported to the outside, so that not only the vehicle movement can be detected immediately, but also an alarm sound alerts the surroundings. Thus, it is possible to prevent theft in advance and to promptly notify the security personnel.
Further, in the fourth aspect, when the monitoring signal is received and the keyless signal is received, it is determined that the authorized user has unlocked and boarded the door of the monitored vehicle, and thereafter the monitoring signal cannot be received. For example, it is assumed that the monitored vehicle has moved from the parking lot and shifts to the non-monitoring mode. Therefore, the transition to the monitoring mode and the transition to the non-monitoring mode are both automatically set by the normal parking operation and the leaving operation. can do.
Further, in claim 5, since the monitoring signal is a TPMS signal transmitted from a tire pressure monitoring system that monitors the tire pressure of the vehicle to be monitored, when the tire pressure monitoring system is required, it is necessary to provide a new transmitter. The cost can be reduced.
Further, in claim 6, since at least the monitoring signal receiving means, the keyless signal receiving means, the alarm generating means, the theft reporting means, and the control means are built in the parking stop of the parking lot, the communication distance with the monitoring signal becomes close, Power consumption can be minimized.
Further, in claim 7, since the communicable distance between the monitoring signal receiving means and the monitoring signal is at least equal to or larger than the diameter of the wheel of the vehicle to be monitored, when the monitoring signal is a TPMS signal, at which position of the wheel the transmission source Communication is possible even if there is.
In claim 8, since the theft reporting means can report to the outside by wire or wireless, the reporting partner can be appropriately selected.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. .
Fig.1 (a) is a figure which shows the positional relationship with the vehicle at the time of installing the vehicle monitoring apparatus of this invention in the vehicle stop of a parking lot. FIG.1 (b) is a block diagram of the vehicle monitoring apparatus of one Embodiment of this invention. The vehicle monitoring apparatus of the present invention uses a TPMS signal transmitted from a tire pressure monitoring system (TPMS: Tire Pressure Monitoring System) scheduled to be required by law in the future as a monitoring signal, and stops the vehicle monitoring apparatus of the present invention. Built-in configuration.
The vehicle monitoring device 100 includes a TPMS signal receiver (monitoring signal receiving means) 4 that receives a TPMS signal transmitted from a TPMS 13 of a monitoring target vehicle (hereinafter simply referred to as a vehicle) 1 and a door lock of the vehicle 1. When released, a keyless signal receiver (keyless signal receiving means) 3 that receives a signal transmitted by the keyless entry 14 of the vehicle 1 and an alarm generator (alarm that emits an alarm sound when the vehicle 1 encounters theft) Generation means) 9, an alarm notification device (theft notification means) 7 for reporting to the outside that the vehicle 1 has been stolen, and an alarm generated based on signals received by the keyless signal receiver 3 and the TPMS signal receiver 4 , A signal processing unit (control means) 8 that controls the alarm notification device 7, and a battery 1 that is a power source of the vehicle monitoring device 100 It is configured to include a and. The keyless signal receiver 3, the TPMS signal receiver 4, and the alarm notification device 7 are provided with the antennas 2, 5, and 6, respectively, but one antenna may be shared. The alarm generator 9 is provided with a speaker 10. Further, a TPMS 13 is attached to the tire 12 of the vehicle 1, and a keyless entry 14 for transmitting a keyless signal is attached to the lower part of the vehicle body. Further, although the battery 11 is used as the power source, the power source may be supplied from the outside.

FIG. 2 is a flowchart for explaining the schematic operation of the vehicle monitoring apparatus of the present invention. The vehicle monitoring apparatus of the present invention is controlled by three modes. That is, a monitoring mode for monitoring the unauthorized movement of the vehicle, a non-monitoring mode for not monitoring the movement of the vehicle after the authorized user has moved the vehicle, and an alarm mode for performing an alarm process when an unauthorized movement occurs There is. Next, the operation will be described for each mode. The monitoring mode of Fig.2 (a) is demonstrated. In the monitoring mode, the TPMS signal receiver 4 always receives the TPMS signal transmitted from the TPMS 13 (S1), and if the keyless signal receiver 3 does not receive the keyless signal (NO route in S2), the process returns to step S1. To continue monitoring mode. When the keyless entry 14 receives the keyless signal by transmitting a radio wave from the key of the vehicle 1 so that the authorized user moves the vehicle, the door of the vehicle 1 is unlocked. At the same time, when the keyless signal receiver 3 receives the keyless signal (YES route in S2), the TPMS signal receiver 4 determines whether or not to receive the TPMS signal from the TPMS 13 (S3). That is, whether or not the vehicle 1 has moved is monitored, and if no TPMS signal is received in step S3 (YES route in S3), it is determined that the authorized user has moved the vehicle 1. Shift to non-monitoring mode.
Further, when the TPMS signal receiver 4 does not receive the TPMS signal transmitted from the TPMS 13 in step S1 (NO route in S1), it shifts to the alarm mode.
Next, the non-monitoring mode of FIG. In the non-monitoring mode, even when the vehicle 1 is not parked in the parking lot, the alarm is not set. When the regular vehicle 1 parks again from such a mode and approaches the car stop 15, as a result, the TPMS signal transmitted from the TPMS 13 is received by the TPMS signal receiver 4 (YES route in S4). As a result, it is determined that the legitimate vehicle 1 is parked at the car stop 15 and the mode is shifted to the monitoring mode.
Next, the alarm mode of FIG. In the alarm mode, the alarm generation unit 9 drives the speaker 10 to generate an alarm sound, and alerts the surroundings that the vehicle 1 has been stolen. At the same time, the alarm notification device 7 notifies the device (not shown) by radio via the antenna 6 that the vehicle 1 has been stolen (S5). When the alarm mode is exited, the mode is changed to the monitoring mode, and the alarm mode is continued until the TPMS signal is received in step 1.

FIG. 3 is a schematic diagram illustrating a vehicle monitoring system for a parking lot provided with the vehicle monitoring device of the present invention. In this vehicle monitoring system 200, a plurality of vehicle monitoring devices 22 of the present invention provided in the parking lot 20 are installed in a vehicle stop, and a plurality of vehicles 21 are parked in the vehicle monitoring device 22. Further, a place where the vehicle 21 is not present in the vehicle monitoring device 22 is a moving vehicle or an empty parking space. Each vehicle monitoring device 22 is connected by a cable 23 to a parking lot management device 24 installed in the parking lot. Further, outside the parking lot, there is a management center 29 for comprehensively managing information from such parking lots, and the management center 29 is configured to be connected to the security company 28 by radio in preparation for an unexpected situation. .
Next, the operation of the vehicle monitoring system 200 will be described. All vehicles parked in the parking lot 20 are contracted with a company that operates the vehicle monitoring system, and each has a unique ID. Therefore, when the vehicle is parked or moved, the vehicle monitoring device 22 reads the ID and the information is transmitted from the parking lot management device 24 to the management center 29. In other words, the vehicle monitoring system 200 also manages vehicles in the parking lot. Here, a case where an unauthorized person enters the parking lot 20 from the outside and moves the vehicle 21 illegally will be described. When an unauthorized person moves the vehicle 21 by some means, the TPMS signal receiver 4 does not receive the TPMS signal. The result is transmitted to the parking lot management device 24 via the cable 23. The parking lot management device 24 sends the information to the management center 29 via the antenna 24 by radio. The management center 29 can dispatch security guards from the security company 28 to the parking lot 20 by contacting the security company 28 based on the information.

As described above, the present invention shifts to the monitoring mode by receiving the TPMS signal transmitted from the vehicle 1 by the TPMS signal receiver 4, and if the TPMS signal cannot be received during the monitoring mode, the vehicle 1 Because it is judged that the vehicle has been moved from the location, an alarm is generated, so that not only the vehicle movement can be detected immediately, but also alarm sounds can be used to alert the surroundings and prevent theft in advance. Can be reported promptly.
Further, when the TPMS signal is received and the keyless signal is received, it is determined that the authorized user has unlocked the vehicle 1 and has boarded the vehicle. Since it shifts to the non-monitoring mode on the assumption that it has moved from the parking lot, both the transition to the monitoring mode and the transition to the non-monitoring mode can be automatically set by the normal parking operation and the leaving operation.
Further, since the TPMS signal is a TPMS signal transmitted from the tire pressure monitoring system that monitors the tire pressure of the vehicle 1, when the tire pressure monitoring system is obligated, it is not necessary to provide a new transmitter, thereby reducing the cost. Can be realized.
In addition, since at least the TPMS signal receiver 4, the keyless signal receiver 3, the alarm generator 9, the alarm notification device 7, and the signal processing unit 8 are built in the vehicle stop 15 of the vehicle 1, the communication distance with the TPMS signal becomes close. The power consumption of the device can be minimized.
Further, since the communicable distance between the TPMS signal receiver 4 and the TPMS signal is at least equal to or larger than the diameter of the wheel 12 of the vehicle 1, when the monitoring signal is a TPMS signal, the transmission source is located at any position of the wheel 12. Can also communicate.
In addition, since the alarm reporting device 7 can report to the outside by wire or wireless, the reporting partner can be selected as appropriate.

(A) is a figure which shows the positional relationship with the vehicle at the time of installing the vehicle monitoring apparatus of this invention in a parking lot, (b) is a block diagram of the vehicle monitoring apparatus of one Embodiment of this invention. It is a figure explaining schematic operation | movement of the vehicle monitoring apparatus of this invention, (a) is a monitoring mode, (b) is a non-monitoring mode, (c) is a flowchart which shows an alarm mode. It is a schematic diagram explaining the vehicle monitoring system of the parking lot provided with the vehicle monitoring apparatus of this invention.

Explanation of symbols

  100 vehicle monitoring device, 1 vehicle to be monitored, 3 keyless signal receiver, 4 TPMS signal receiver, 7 alarm notification device, 8 signal processing unit, 9 alarm generator, 11 battery, 13 TPMS, 14 keyless entry

Claims (8)

A vehicle monitoring device for preventing vehicle theft,
Monitoring signal receiving means for receiving a monitoring signal transmitted from the monitored vehicle, and keyless signal receiving means for receiving a signal transmitted by a keyless entry of the monitored vehicle when the door lock of the monitored vehicle is released And an alarm generating means for generating an alarm sound when the monitored vehicle encounters theft, and a control means for controlling the alarm generating means based on signals received by the monitoring signal receiving means and the keyless signal receiving means. Prepared,
The control means shifts to a monitoring mode by receiving a monitoring signal transmitted from the monitored vehicle by the monitoring signal receiving means, and the monitoring signal receiving means does not receive the monitoring signal during the monitoring mode. A vehicle monitoring apparatus that controls the alarm generation means to generate an alarm sound when an alarm is detected. A vehicle monitoring device for preventing vehicle theft,
Monitoring signal receiving means for receiving a monitoring signal transmitted from the monitored vehicle, and keyless signal receiving means for receiving a signal transmitted by a keyless entry of the monitored vehicle when the door lock of the monitored vehicle is released A theft reporting means for reporting to the outside that the monitored vehicle has been stolen; a control means for controlling the theft reporting means based on signals received by the monitoring signal receiving means and the keyless signal receiving means; With
The control means shifts to a monitoring mode by receiving a monitoring signal transmitted from the monitored vehicle by the monitoring signal receiving means, and the monitoring signal receiving means does not receive the monitoring signal during the monitoring mode. When the vehicle is detected, the vehicle monitoring device controls the theft reporting means so as to notify the outside that the monitored vehicle has been stolen. A vehicle monitoring device for preventing vehicle theft,
Monitoring signal receiving means for receiving a monitoring signal transmitted from the monitored vehicle, and keyless signal receiving means for receiving a signal transmitted by a keyless entry of the monitored vehicle when the door lock of the monitored vehicle is released An alarm generating means for generating an alarm sound when the monitored vehicle encounters theft, a theft reporting means for reporting to the outside that the monitored vehicle has been stolen, the monitoring signal receiving means and the keyless signal receiving Control means for controlling the alarm generating means and the theft reporting means based on the signal received by the means,
The control means shifts to a monitoring mode by receiving a monitoring signal transmitted from the monitored vehicle by the monitoring signal receiving means, and the monitoring signal receiving means does not receive the monitoring signal during the monitoring mode. The alarm generating means is controlled so as to generate an alarm sound, and the theft reporting means is controlled so as to notify the outside that the monitored vehicle has been stolen. Vehicle monitoring device.   When the control means receives a signal transmitted by the keyless entry during the monitoring mode by the keyless signal receiving means and detects that the monitoring signal receiving means does not receive the monitoring signal, the control object 4. The vehicle monitoring device according to claim 1, wherein the vehicle monitoring device shifts to a non-monitoring mode in which the vehicle is not monitored.   5. The vehicle monitoring device according to claim 1, wherein the monitoring signal is a TPMS signal transmitted from a tire pressure monitoring system that monitors tire pressure of the monitoring target vehicle.   The vehicle according to any one of claims 1 to 5, wherein at least the monitoring signal receiving means, keyless signal receiving means, alarm generating means, theft reporting means, and control means are incorporated in a parking stop of a parking lot. Monitoring device.   The communicable distance between the monitoring signal receiving means and the monitoring signal transmitted from the monitoring target vehicle is at least equal to or larger than the diameter of the wheel of the monitoring target vehicle. The vehicle monitoring device described in 1.   The vehicle monitoring apparatus according to claim 1, wherein the theft reporting unit is capable of reporting to the outside by wire or wireless.

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