JP7298859B1 - anti-theft device - Google Patents

Abstract

A thief is prevented from entering a vehicle. An anti-theft device (1) includes a first switching unit (11) for switching between a normal state in which a battery (2) can supply power to an in-vehicle device (3) and a protection state in which the battery (2) cannot supply power to the in-vehicle device (3), and an operation device. The communication unit 12 receives the operation data from the communication unit 100, and when the operation data indicates that the normal state is to be set, the first switching unit 11 is set to the normal state, and the operation data received by the communication unit 12 is set to the protected state. is shown, the control unit 13 puts the first switching unit 11 into a protection state. [Selection drawing] Fig. 2

Description

The present invention relates to an anti-theft device for preventing vehicle theft.

2. Description of the Related Art Conventionally, there is known an anti-theft device for cutting off power supply from a battery of a vehicle in order to prevent vehicle theft (see, for example, Patent Document 1).

JP 2010-89597 A

A conventional anti-theft device cuts off the power supply from the battery when a thief enters the vehicle, starts the engine, and detects an increase in current consumption. Therefore, until the engine is started, the electronic lock of the vehicle is in a state of operation, so a thief can illegally unlock the vehicle and break into the vehicle by means of, for example, a relay attack. There was a problem.

Accordingly, the present invention has been made in view of these points, and an object of the present invention is to prevent a thief from breaking into a vehicle.

An anti-theft device according to the present invention is an anti-theft device connected between a battery of a vehicle and an in-vehicle device operated by power supplied by the battery, wherein the battery can supply power to the in-vehicle device. a first switching unit for switching between a normal state and a protection state in which the battery cannot supply power to the in-vehicle device; a communication unit for receiving operation data from an operation device; a control unit for setting the first switching unit to the normal state when the control unit is in the normal state, and setting the first switching unit to the protection state when the operation data received by the communication unit indicates that the protection state is to be set. and have

The communication unit receives the operation data indicating a return time to return from the protected state to the normal state, and the control unit transmits the operation data indicating to return to the normal state at the return time. The first switching unit may be controlled to switch from the protection state to the normal state even if the unit has not received the signal.

When the memory stores a return time to return from the protected state to the normal state, the control unit returns to the protected state after a predetermined time has elapsed since the engine of the vehicle was detected to have stopped. The first switching unit may be controlled to switch from the normal state to the protected state even if the communication unit has not received the operation data indicating that the normal state is to be set.

The anti-theft device further includes a second switching unit that switches between a state in which the communication unit receives power supply from the battery and a state in which power is not supplied from the battery, and the control unit changes the protection state. After the communication unit receives the operation data indicating that the power is supplied from the battery, the second switching unit is controlled so that the communication unit is not supplied with power from the battery, and the communication unit receives power from the battery The second switching unit may be controlled so that the communication unit receives power supply from the battery at the time set as the time to return to the state of receiving power supply.

When the communication unit receives the operation data for setting the protection state, the control unit switches to the protection state on condition that the engine of the vehicle is stopped, and switches to the protection state when the engine is not stopped. may not be switched to the protection state.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to suppress an intrusion into a vehicle by a thief.

1 is a diagram for explaining an outline of an anti-theft system S; FIG. 2 is a diagram schematically showing the internal configuration of the anti-theft device 1; FIG. 3 is a diagram showing an example of a first switching unit 11; FIG. FIG. 3 is a diagram showing the configuration of an anti-theft device 1a that is a first modification of the anti-theft device 1; FIG. 8 is a diagram showing the configuration of an anti-theft device 1b, which is a second modification of the anti-theft device 1; FIG. 10 is a diagram showing the configuration of an anti-theft device 1c, which is a third modification of the anti-theft device 1; FIG. 10 is a diagram showing the configuration of an anti-theft device 1c, which is a third modification of the anti-theft device 1; 4 is a flow chart showing an example of the flow of processing in the anti-theft device 1b.

[Overview of anti-theft system S]
FIG. 1 is a diagram for explaining an outline of an anti-theft system S. FIG. The anti-theft system S includes an anti-theft device 1 and an operation device 100. FIG. The anti-theft device 1 is installed in a vehicle and used to prevent a thief from entering the vehicle or stealing the vehicle.

The operation device 100 is a device for the vehicle user U to operate the anti-theft device 1 . The operation device 100 may be configured integrally with a key or immobilizer for opening and closing the doors of the vehicle, or may be a dedicated device for operating the anti-theft device 1 . The operation device 100 may be a communication terminal such as a smart phone in which an application program for operating the anti-theft device 1 is installed. The operation device 100 is provided with buttons for the user U to operate. The operation device 100 may be provided with a display for displaying information.

The anti-theft device 1 is used while being connected between a battery 2 of a vehicle and an in-vehicle device 3 that operates with power supplied by the battery 2 . The anti-theft device 1 prevents a thief from entering the vehicle or stealing the vehicle by putting the battery 2 into a state in which it cannot supply electric power to the vehicle-mounted device 3 . The anti-theft device 1 is supposed to be installed near the battery 2 of the vehicle, but the place where the anti-theft device 1 is installed is arbitrary.

As shown in FIG. 1, the anti-theft device 1 is used while being inserted in the middle of the wiring for connecting the battery 2 and the in-vehicle device 3 . Specifically, the anti-theft device 1 is connected to a power supply terminal and a ground (GND) terminal of the battery 2 , and is also connected to wiring on the power supply side and wiring on the ground side connected to the in-vehicle device 3 . The in-vehicle device 3 is an electronic device that operates on power supplied by the battery 2 in the vehicle, such as an engine control unit (ECU), an electronic lock, a light, an air conditioner, or a car navigation device.

The anti-theft device 1 can receive data from the operation device 100 via a communication channel. The communication channel is, for example, Bluetooth (registered trademark), Wi-Fi (registered trademark), or a mobile phone communication line, but the communication method is arbitrary. The communication channel may be a wired communication channel. The anti-theft device 1 operates in a normal state in which the power output from the battery 2 is supplied to the in-vehicle device 3 based on the operation data transmitted by the operation device 100 when the user U of the vehicle operates the operation device 100. is switched to a protection state in which the power output by is not supplied to the in-vehicle device 3.

When the anti-theft device 1 is in a protected state, electric power is not supplied to the in-vehicle device 3, so the electronic lock cannot be unlocked, and a thief can illegally open the door of the vehicle and enter the vehicle. become unable. As a result, when the anti-theft device 1 is installed, the probability of the vehicle being stolen can be reduced. Furthermore, even if a thief destroys the vehicle and breaks into the vehicle, the vehicle cannot be moved because the engine cannot be started. As a result, when the anti-theft device 1 is installed, the probability of the vehicle being stolen can also be reduced.

[Configuration of anti-theft device 1]
FIG. 2 is a diagram schematically showing the internal configuration of the anti-theft device 1. As shown in FIG. The anti-theft device 1 has a first switching section 11 , a communication section 12 and a control section 13 . The anti-theft device 1 also has a terminal T1, a terminal T2, a terminal T3, and a terminal T4. The terminal T1 is connected to the power terminal of the battery 2, and the terminal T2 is connected to the ground terminal of the battery 2. FIG. The terminal T3 is connected to the wiring on the power supply side connected to the in-vehicle device 3 , and the terminal T4 is connected to the wiring on the ground side connected to the in-vehicle device 3 .

Under the control of the communication unit 12, the first switching unit 11 switches between a normal state in which the battery 2 can supply power to the in-vehicle device 3 (the state shown in FIG. 2A), and a state in which the battery 2 supplies power to the in-vehicle device 3. and the protected state (state shown in FIG. 2B). FIG. 3 is a diagram showing an example of the first switching section 11. As shown in FIG. As shown in FIG. 3A, the first switching unit 11 may be a field effect transistor, and as shown in FIG. 3B, the first switching unit 11 may be a relay.

The communication unit 12 receives operation data from the operation device 100 . The communication unit 12 receives, for example, operation data for setting the protection state in which the power output by the battery 2 is not supplied to the onboard device 3, or operation data for setting the normal state in which the output power is supplied to the onboard device 3. receive.

The control unit 13 has, for example, a CPU (Central Processing Unit) and memory, and by executing a program stored in the memory, based on the operation data received by the communication unit 12, a normal state and a protected state. The first switching unit 11 is controlled to switch between . In the initial state when the anti-theft device 1 starts operating, or when the operation data indicates that the normal state should be set, the control unit 13 puts the first switching unit 11 in the normal state, and changes the operation data received by the communication unit 12 to the normal state. indicates that the protection state is to be set, the first switching unit 11 is set to the protection state.

By operating the control unit 13 in this way, in the protected state, a thief cannot easily enter the vehicle, and even if the thief tries to enter the vehicle and start the engine, the engine will not start. prevent theft of Then, when the user U of the vehicle holding the operation device 100 performs an operation for setting the normal state, the user U can enter the vehicle and start the engine.

By the way, if the user U loses the operation device 100 or forgets to bring the operation device 100 to the place where the vehicle is parked, there may arise a problem that the user U of the vehicle cannot use the vehicle. Therefore, the anti-theft device 1 may be configured so that the user U can preset the time to return from the protected state to the normal state.

When the user U inputs the time to return from the protected state to the normal state on the operation device 100 , the operation device 100 transmits the input time to the anti-theft device 1 . In this case, the communication unit 12 receives the operation data indicating the return time to return from the protected state to the normal state. The control unit 13 causes the memory to store the recovery time indicated by the received operation data. Then, for example, when the current time output by the clock IC (not shown) reaches the recovery time, the control unit 13 switches from the protected state to the normal state even if the communication unit 12 has not received the operation data indicating that the normal state is to be set. The first switching unit 11 is controlled to set the state.

The control unit 13 updates the return time stored in the memory each time the communication unit 12 receives a new return time. When the communication unit 12 receives the operation data indicating to cancel the return time, the control unit 13 erases the return time stored in the memory. The operation device 100 is configured so that a plurality of return times can be set, and when the communication unit 12 receives operation data indicating a plurality of return times, the control unit 13 causes the memory to store the plurality of return times. good too.

As an example, the user U has set the return times at 7:00 am and 6:00 pm so that the user U uses the vehicle to go to work from 7:00 am every morning and uses the vehicle to go home at around 6:00 pm every day. and In this case, after the user U comes to work, parks the vehicle in the parking lot, and is set to the protected state, at 6:00 pm, the control unit 13 returns from the protected state to the normal state. Thereafter, after the user U returns home, parks the vehicle in the parking lot, and is set to the protected state, at 7:00 am, the control unit 13 returns from the protected state to the normal state. With the anti-theft device 1 and the operation device 100 configured in this way, even if the user U loses the operation device 100 or forgets to bring the operation device 100 to the place where the vehicle is parked, the user can It prevents U from being unable to use the vehicle. Note that the return time may be set for each year/month/day or day of the week.

When the memory stores the return time to return from the protected state to the normal state, the control unit 13 indicates that the protected state is to be set after a predetermined period of time has elapsed after detecting that the engine of the vehicle has stopped. The first switching unit 11 may be controlled to switch from the normal state to the protected state even if the communication unit 12 has not received the operation data. In the case of the above example, the control unit 13 automatically switches from the normal state to the protected state after 10 minutes have passed since the user U left the vehicle for work and parked in the parking lot. With the control unit 13 operating in this manner, even if the user U forgets to perform the operation for setting the protection state, the protection state is established, thereby increasing the effect of preventing intrusion into the vehicle and theft of the vehicle.

However, if the user U who forgets to bring the operation device 100 wants to use the vehicle before the return time but is automatically put into the protected state, the time when the user U wants to use the vehicle The vehicle becomes unusable. Therefore, the control unit 13 sends a confirmation message via the communication unit 12 to the operation device 100 or another communication terminal used by the user U ( For example, it may be transmitted to a smartphone) and switched to the protected state in response to receiving approval from the user U.

FIG. 4 is a diagram showing the configuration of an anti-theft device 1a, which is a first modification of the anti-theft device 1. As shown in FIG. The anti-theft device 1a shown in FIG. 2 in that it further includes a second switching unit 14 for switching between the state) and the anti-theft device 1 shown in FIG. A dashed line in FIG. 4(b) indicates a state in which no power is supplied.

The control unit 13 controls the second switching unit 14 so that the communication unit 12 does not receive power supply from the battery 2 after the communication unit 12 receives the operation data indicating the protection state. The control unit 13 causes the communication unit 12 to stop supplying power from the battery 2 at the time set as the time for returning the communication unit 12 to receive power supply from the battery 2 (hereinafter referred to as “communication start time”). The second switching unit 14 is controlled so as to be in a receiving state.

The communication start time can be set by the user U using the operation device 100, for example, like the return time described above. When the communication unit 12 receives the communication start time transmitted from the operation device 100, the control unit 13 stores the received communication start time in the memory. When the communication start time comes after switching to the protected state, the control unit 13 controls the second switching unit 14 to start the operation of the communication unit 12, and the communication unit 12 receives the operation data transmitted by the operation device 100. It can be so.

By configuring the anti-theft device 1a in this manner, the thief can operate the anti-theft device 1a using the operation device 100 obtained illegally until the communication start time set by the user U. However, since the communication unit 12 cannot receive the operation data, the thief cannot switch the anti-theft device 1a to the normal state. Furthermore, since the communication unit 12 does not consume power from the protection state to the communication start time, it is possible to suppress the decrease in the remaining power of the battery 2 . Although the second switching unit 14 is provided outside the communication unit 12 in the example shown in FIG. 4, the second switching unit 14 may be built in the communication unit 12.

FIG. 5 is a diagram showing the configuration of an anti-theft device 1b, which is a second modification of the anti-theft device 1. As shown in FIG. The anti-theft device 1b shown in FIG. 5 is different from the anti-theft device 1a shown in FIG. are the same in that The anti-theft device 1 may further have a terminal T5 in the configuration shown in FIG.

The control unit 13 receives control data indicating that the engine has stopped via the terminal T5. When the communication unit 12 receives the operation data for setting the protection state, the control unit 13 sets the protection state on the condition that the control data received via the terminal T5 indicates that the engine is stopped. , and may not switch to the protected state when the engine is not stopped. With the control unit 13 operating in this manner, even if operation data for putting the protection state into the protection state is transmitted from the operation device 100 due to an erroneous operation by the user U while the engine is not stopped, the vehicle is not switched to the protection state. can continue running normally, so safety is improved.

6 and 7 are diagrams showing the configuration of an anti-theft device 1c, which is a third modification of the anti-theft device 1. FIG. The anti-theft device 1c is different from the anti-theft device 1 shown in FIG. FIG. 6 shows the anti-theft device 1c in the normal state, and FIG. 7 shows the anti-theft device 1c in the protected state.

The communication unit 12 and the control unit 13 in the anti-theft device 1 c operate not by the power supplied from the battery 2 but by the power supplied by the battery 15 . Battery 15 is a secondary battery that can be charged with the power of battery 2 via charging circuit 16 . In the normal state, the controller 13 controls the charging circuit 16 so that the power of the battery 2 is supplied to the battery 15 as shown in FIG. Thereby, the battery 15 is charged while the vehicle is running.

In the protection state, the controller 13 controls the charging circuit 16 so that the power of the battery 2 is not supplied to the battery 15, as shown in FIG. As a result, it is possible to prevent the remaining power of the battery 2 from decreasing in the protected state.

[Example of flow of processing in anti-theft device 1b]
FIG. 8 is a flow chart showing an example of the flow of processing in the anti-theft device 1b shown in FIG. The flowchart shown in FIG. 8 starts when the anti-theft device 1b is connected to the battery 2 and the anti-theft device 1b starts operating in a normal state with power supplied from the battery 2. FIG. The anti-theft device 1b starts to operate, for example, when a power switch (not shown) is turned on after being connected to the battery 2 .

The control unit 13 monitors whether or not the communication unit 12 has received operation data (“protected operation data” in FIG. 8) for setting the protected state from the operation device 100 (S1). When the communication unit 12 receives the protection operation data (YES in S1), the control unit 13 determines whether or not the engine of the vehicle is off based on the data transmitted from the in-vehicle device 3 (S2 ). When the control unit 13 determines that the engine of the vehicle is not turned off (NO in S2), the control unit 13 returns the process to S1 without executing the switching operation to the protection state according to the operation data.

When the control unit 13 determines that the engine of the vehicle is turned off (YES in S2), the control unit 13 controls the first switching unit 11 so that the first switching unit 11 is turned off (that is, the disconnected state). (S3). As a result, a protective state is entered in which power is not supplied from the battery 2 to the vehicle-mounted device 3 .

After that, when a predetermined time elapses and the communication end time for ending the operation of the communication unit 12 comes (YES in S4), the second switching unit 14 is turned off (that is, in the unconnected state) so that the communication unit 12 , so that the communication unit 12 is turned off (S5). After that, when the communication start time comes (YES in S6), the control unit 13 turns on the second switching unit 14 (that is, the connected state) so that power is supplied to the communication unit 12. The communication unit 12 is turned on (S7).

After that, the control unit 13 monitors whether or not the communication unit 12 has received operation data (“normal operation data” in FIG. 8) for setting the normal state from the operation device 100 (S8). When the communication unit 12 receives the normal operation data (YES in S8), the control unit 13 controls the first switching unit 11 so as to turn on the first switching unit 11 (that is, the connected state) (S9). . If the communication unit 12 has not received the normal operation data (NO in S8), the control unit 13 returns to S4. If the controller 13 determines in S4 that the communication end time has not yet come (NO in S4), it executes the process of S8. The anti-theft device 1 repeats the processing from S1 to S10 until the power supply from the battery 2 is exhausted.

[Effect of anti-theft device 1]
As described above, the control unit 13 of the anti-theft device 1 according to the present embodiment controls the first switching unit when the operation data received by the communication unit 12 from the operation device 100 indicates that the normal state should be set. 11 is set to a normal state in which the battery can supply power to the in-vehicle device 3, and the operation data received by the communication unit 12 indicates that the protection state is to be set, the first switching unit 11 is set to the state in which the battery 2 powers the in-vehicle device 3. to a protected state in which it is not possible to supply By configuring the anti-theft device 1 in this way, it is possible to prevent thieves from entering the vehicle, and the probability of the vehicle being stolen is reduced.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various modifications and changes are possible within the scope of the gist thereof. be. For example, all or part of the device can be functionally or physically distributed and integrated in arbitrary units. In addition, new embodiments resulting from arbitrary combinations of multiple embodiments are also included in the embodiments of the present invention. The effect of the new embodiment caused by the combination has the effect of the original embodiment.

1 anti-theft device 2 battery 3 in-vehicle device 11 first switching unit 12 communication unit 13 control unit 14 second switching unit 15 battery 16 charging circuit

Claims (4)

An anti-theft device connected between a vehicle battery and an electronic lock and/or engine control unit operated by power supplied by the battery, comprising:
A first switch for switching between a normal state in which the battery can power the electronic lock and/or the engine control unit and a protection state in which the battery cannot power the electronic lock and/or the engine control unit. Department and
a communication unit that receives operation data from the operation device;
When the operation data indicates that the normal state is to be set, the first switching unit is set to the normal state, and if the operation data received by the communication unit indicates that the protection state is to be set, the a control unit that sets the first switching unit to the protection state;
has
The communication unit receives the operation data indicating a recovery time from the protected state to the normal state,
The control unit controls the first switching unit to switch from the protection state to the normal state when the return time comes, even if the operation data indicating switching to the normal state is not received by the communication unit. do,
Anti-theft device. An anti-theft device connected between a vehicle battery and an electronic lock and/or engine control unit operated by power supplied by the battery, comprising:
A first switch for switching between a normal state in which the battery can power the electronic lock and/or the engine control unit and a protection state in which the battery cannot power the electronic lock and/or the engine control unit. Department and
a communication unit that receives operation data from the operation device;
When the operation data indicates that the normal state is to be set, the first switching unit is set to the normal state, and if the operation data received by the communication unit indicates that the protection state is to be set, the a control unit that sets the first switching unit to the protection state;
has
When the memory stores a return time to return from the protected state to the normal state, the control unit returns to the protected state after a predetermined time has elapsed since the engine of the vehicle was detected to have stopped. controlling the first switching unit to switch from the normal state to the protected state even if the communication unit has not received the operation data indicating that
Anti-theft device. An anti-theft device connected between a vehicle battery and an electronic lock and/or engine control unit operated by power supplied by the battery, comprising:
A first switch for switching between a normal state in which the battery can power the electronic lock and/or the engine control unit and a protection state in which the battery cannot power the electronic lock and/or the engine control unit. Department and
a communication unit that receives operation data from the operation device;
When the operation data indicates that the normal state is to be set, the first switching unit is set to the normal state, and if the operation data received by the communication unit indicates that the protection state is to be set, the a control unit that sets the first switching unit to the protection state;
a second switching unit for switching between a state in which the communication unit receives power supply from the battery and a state in which power is not supplied from the battery;
has
The control unit controls the second switching unit so that the communication unit receives no power supply from the battery after the communication unit receives the operation data indicating that the protection state is to be set. and controlling the second switching unit so that the communication unit receives power supply from the battery at the time set as the time at which the communication unit returns to the state of receiving power supply from the battery,
Anti-theft device. An anti-theft device connected between a vehicle battery and an engine control unit operated by power supplied by the battery,
a first switching unit that switches between a normal state in which the battery can supply power to the engine control unit and a protection state in which the battery cannot supply power to the engine control unit ;
a communication unit that receives operation data from the operation device;
When the operation data indicates that the normal state is to be set, the first switching unit is set to the normal state, and if the operation data received by the communication unit indicates that the protection state is to be set, the a control unit that sets the first switching unit to the protection state;
has
When the communication unit receives the operation data for setting the protection state, the control unit switches to the protection state on condition that the engine of the vehicle is stopped, and switches to the protection state when the engine is not stopped. does not switch to said protection state in
Anti-theft device.

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