JP6968250B1 - Vehicle anti-theft system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle anti-theft system which improves anti-theft property without requiring complicated operation. SOLUTION: An in-vehicle device type anti-theft device 1 for transmitting an ID authentication request 1A requesting ID authentication and an in-vehicle device type anti-theft device 1A transmitted from the in-vehicle device type anti-theft device 1 are received. When the on-board unit type anti-theft device 1 is provided with the portable device 2 for transmitting the ID authentication request response 2A to 1, the on-board unit type anti-theft device 1 determines whether or not the received ID authentication request response 2A is normal when the ID authentication request response 2A is received. Then, after the vehicle system is stopped, the state is automatically switched to the state in which ID authentication is prohibited. [Selection diagram] Fig. 1

Description

The present application relates to a vehicle anti-theft system.

Anti-theft devices (keyless entry system, smart entry system, etc.) for saddle-type vehicles that perform key authentication by wireless communication between portable devices and in-vehicle devices have been developed. In this saddle-type vehicle anti-theft device, the on-board unit receives the authentication request transmitted from the on-board unit and responds from the mobile device with a signal including identification information unique to the on-board unit, so that the on-board unit receives the authentication request in advance. A technique for unlocking the handle and starting the engine by collating with the registered identification information is known.

In recent years, a technology (relay) that indirectly propagates communication between a portable device and the vehicle by using a repeater for a portable device far away from the vehicle, enabling the handle lock of the vehicle to be unlocked and the engine to be started (relay). Attack) is known. This technology raises concerns about anti-theft properties in anti-theft devices.

As measures against the theft method, for example, as disclosed in Patent Documents 1 to 4, a configuration in which the transmission antenna output of the in-vehicle device is changed stepwise, a configuration in which a plurality of transmission antennas are arranged, and a radio wave propagation distance Various anti-theft measures have been devised, such as a configuration for measuring.
Since these anti-theft measures use radio waves, they are affected by the surrounding environment of the vehicle (buildings, metal, human body, other vehicles), which reduces the accuracy of relay attack judgment and even a normal authentication request. There are problems such as false detection as a relay attack. There is also a technology that uses multiple antennas to improve the judgment accuracy, but for example, the number of antennas installed in a two-wheeled vehicle may be small, which not only increases costs but also antennas as a countermeasure. Securing the space to mount the antenna is also an issue.

Further, as a countermeasure against the theft method, a technique for enabling and disabling the function of the portable device is known, but the user must perform the operation by himself / herself, and there is a possibility of forgetting to disable the function. In addition, as another measure, there is a method of storing the portable device in a radio wave blocking case, but all of them lose convenience for the user.

Based on the above, as a countermeasure against the theft method, select either a measure that does not change the user operation but has a concern about cost and accuracy, or a measure that has an anti-theft effect but loses the convenience of the user. There is a need.

Japanese Unexamined Patent Publication No. 2016-084589 Japanese Unexamined Patent Publication No. 2013-127184 Japanese Unexamined Patent Publication No. 2016-017279 Japanese Unexamined Patent Publication No. 2017-059170

The present application discloses a technique for solving the above-mentioned problems, and an object of the present application is to provide a vehicle anti-theft system that improves anti-theft property without requiring complicated operations.

The vehicle anti-theft system disclosed in the present application receives the on-board unit type anti-theft device for transmitting an ID authentication request requesting ID authentication and the ID authentication request transmitted from the on-board unit type anti-theft device, and the above-mentioned It is equipped with a portable device that sends an ID authentication request response including an ID authentication prohibition signal to the in-vehicle device type anti-theft device.
After the vehicle system is stopped, the ID authentication is automatically prohibited.

According to the vehicle anti-theft system disclosed in the present application, it is possible to provide a vehicle anti-theft system that improves the anti-theft property without requiring complicated operations.

It is a block diagram which shows the overall role of the vehicle theft prevention system which concerns on Embodiment 1. FIG. It is a block diagram which shows the schematic structure of the vehicle-mounted device type anti-theft device which concerns on Embodiment 1. FIG. It is a block diagram which shows the schematic structure of the portable device which concerns on Embodiment 1. FIG. It is a block diagram which shows the schematic structure of the engine control device which concerns on Embodiment 1. FIG. It is the first flowchart which shows the example of the engine start permission which concerns on Embodiment 1, and is the flowchart which shows the operation performed by the on-board unit type anti-theft device. It is the 2nd flowchart which shows the example of the engine start permission which concerns on Embodiment 1, and is the flowchart which shows the operation which a portable device performs. It is the 3rd flowchart which shows the operation of switching to ID authentication prohibition which concerns on Embodiment 1, and is the flowchart which shows the operation performed by the on-board unit type anti-theft device. It is the first flowchart which shows the operation of switching to ID authentication prohibition which concerns on Embodiment 2, and is the flowchart which shows the operation which the on-board unit type anti-theft device executes. It is the 2nd flowchart which shows the operation of the ID authentication prohibition release part which concerns on Embodiment 2, and is the flowchart which shows the operation which a portable device performs. It is the first flowchart which shows the operation at the time of the ID authentication prohibition cancellation which concerns on Embodiment 3, and is the flowchart which shows the operation which a portable device performs. It is the 2nd flowchart which shows the operation at the time of the ID authentication prohibition cancellation which concerns on Embodiment 3, and is the flowchart which shows the operation performed by the on-board unit type anti-theft device.

Hereinafter, embodiments of the vehicle anti-theft system according to the present application will be described with reference to the drawings. In each figure, the same or similar components are designated by the same reference numerals, and the sizes and scales of the corresponding components are independent of each other. For example, when illustrating the same component that has not been changed between cross-sectional views in which a part of the structure is changed, the size and scale of the same component may be different. In addition, the configuration of the vehicle anti-theft system and the on-board unit type anti-theft device actually includes a plurality of members, but for the sake of simplicity, only the parts necessary for the explanation are described, and the other parts are described. Is omitted.

Embodiment 1.
FIG. 1 shows a schematic configuration of a vehicle theft prevention system corresponding to a saddle-mounted vehicle according to the first embodiment. The vehicle anti-theft system 100 according to the first embodiment is composed of an on-board device type anti-theft device 1, a portable device 2, an engine control device 3, and the like. The vehicle theft prevention system 100 is applied to a saddle-type vehicle 4 such as a motorcycle, for example. The vehicle 4 is equipped with an engine (not shown).

When ID (Identification) authentication is not prohibited in the vehicle theft prevention system 100, the user (driver) operates the input device 5 of the vehicle 4 to turn on the vehicle system (vehicle power supply), which is an in-vehicle device type. The anti-theft device 1 and the portable device 2 start ID authentication communication, the on-board unit type anti-theft device 1 sends an ID authentication request 1A to the portable device 2, and the portable device 2 receives the ID authentication request 1A and then ID authentication. If successful, the ID authentication request response 2A is transmitted to the on-board unit type anti-theft device 1. Further, if the on-board unit type anti-theft device 1 receives the ID authentication request response 2A and the ID authentication is successful, the engine control device 3 can start the engine (engine start permission).

Further, the on-board unit type anti-theft device 1 is provided with a display device 6 that can notify the user of the status when the ID authentication communication is successful or when the presence / absence of ID authentication prohibition is set.

FIG. 2 shows a schematic configuration of the on-board unit type anti-theft device 1. The on-board device type anti-theft device 1 includes a first input device 7, a second input device 8, a signal transmission unit 9, a signal reception unit 10, a control unit 11, a storage device 12, and the like. The control unit 11 of the on-board unit type anti-theft device 1 is composed of an ID authentication prohibition unit 13, an ID authentication prohibition release unit 14, and the like. The first input device 7 can be used to change the vehicle system (vehicle power supply) from off to on, and the second input device 8 can be used to switch between disabling and enabling the ID authentication prohibition setting.

FIG. 3 is a block diagram showing a schematic configuration of the portable device 2. The portable device 2 includes a signal transmission unit 15, a signal reception unit 16, a third input device 17, a control unit 18, a storage device 19, and the like. The portable device 2 can perform wireless communication with the on-board device type anti-theft device 1 and the engine control device 3 through the signal transmission unit 15 and the signal reception unit 16.

When the portable device 2 receives the ID authentication request 1A from the on-board unit type anti-theft device 1, the portable device 2 transmits the ID authentication request response 2A to the on-board unit type anti-theft device 1. The in-vehicle device type anti-theft device 1 and the portable device 2 that transmits the ID authentication request response 2A are in a pairing relationship, but the portable device 2 is additionally paired and a plurality of in-vehicle device type anti-theft devices 1 are paired. Portable device 2 can be used.

Further, by operating the third input device 17 of the portable device 2, the ID authentication prohibition release state can be switched to the ID authentication prohibition release state or the ID authentication prohibition release state again.

FIG. 4 shows a schematic configuration of the engine control device 3. The engine control device 3 includes a signal receiving unit 20, a signal transmitting unit 21, a fourth input device 22, a control unit 23, a storage device 24, and the like.

In the vehicle theft prevention system 100, the engine control device 3 is attached to the vehicle 4 and controls not only the start of the engine or the adjustment of the output but also the overall control of the vehicle.

Next, with reference to FIGS. 5 and 6, the operation flow of the engine start permission using the on-board unit type anti-theft device 1 and the portable device 2 will be described.
FIG. 5 is a flowchart showing the overall operation of the on-board unit type anti-theft device 1. The presence or absence of ID authentication prohibition is controlled by the ID authentication prohibition unit 13 or the ID authentication prohibition release unit 14 of the on-board unit type anti-theft device 1. When the vehicle-mounted anti-theft device 1 operates the input device 5 to turn on the vehicle system, the flow starts (step ST500).

In order to know the state of ID authentication, the on-board unit type anti-theft device 1 first determines whether or not the vehicle 4 is in a state where the prohibition of ID authentication is lifted (step ST501). If the determination result in step ST501 is the ID authentication prohibition release state, ID authentication is permitted. Therefore, the in-vehicle device type anti-theft device 1 and the portable device 2 start ID authentication communication, and the in-vehicle device type anti-theft device 1 Sends the ID authentication request 1A to the portable device 2 (step ST502), and sends the ID authentication request response 2A from the portable device 2 (step ST503). After the ID authentication is successful (step ST504), the engine start permission flow ends (step ST505).

Here, the ID authentication prohibition means a state in which the vehicle 4 is prohibited from ID authentication, that is, the ID authentication is not permitted. The ID authentication prohibition release means that the vehicle 4 is in a state where the ID authentication prohibition is released, that is, ID authentication is permitted.

If the determination result of step ST501 is not established, that is, if the ID authentication is prohibited, the engine start permission flow ends (engine start is not possible).

FIG. 6 is a flowchart showing the operation of the portable device 2 in the flow of the engine starting operation. The portable device 2 is normally in a power-on state and in a standby state (step ST600). When the portable device 2 from which the flow is started receives the ID authentication request 1A from the in-vehicle device type anti-theft device 1 (step ST601), the portable device 2 transmits an ID authentication request response 2A to the in-vehicle device type anti-theft device 1 (step ST602). .. This completes the operation flow of the portable device 2 (step ST603).

If the portable device 2 and the on-board unit type anti-theft device 1 have a certain value or more, or if there is an obstacle that shields the signal, the ID authentication request 1A cannot be normally received from the on-board unit type anti-theft device 1. Therefore, in step ST602, the portable device 2 cannot transmit the ID authentication request response 2A to the on-board unit type anti-theft device 1. In such a case, the on-board unit type anti-theft device 1 determines in step ST504 that the ID authentication request response 2A is not normal.

Generally, the signal reach of the ID authentication request 1A transmitted from the on-board unit type anti-theft device 1 is shorter than that of the ID authentication request response 2A transmitted from the portable device 2, and is limited to the vicinity of the vehicle 4. For example, the signal reach distance of the ID authentication request response 2A is about 20 m to 100 m from the transmission antenna of the portable device 2, whereas the signal reach distance of the ID authentication request 1A is the transmission antenna of the on-board unit type anti-theft device 1. Therefore, it is about 1 m to 1.5 m. Due to such restrictions, usually, ID authentication with the portable device 2 is performed only when the ID authentication request 1A transmitted by the on-board unit type anti-theft device 1 is within the signal reachable distance.

As a method of stealing a vehicle equipped with a vehicle theft prevention system as described above, a method of relaying a signal (radio wave) (hereinafter referred to as a relay attack) is known. In the relay attack, the ID authentication request 1A transmitted from the on-board unit type anti-theft device 1 is relayed to a distant place using a repeater owned by a third party, and is outside the signal reach of the on-board unit type anti-theft device 1. The ID authentication request 1A is reached to the portable device 2 in. By this method, even if the portable device 2 is not within the reach of the ID authentication request 1A transmitted by the on-board unit type anti-theft device 1, the ID authentication with the portable device 2 is successful, so that a third party starts the engine of the vehicle. It becomes possible to carry out the above, and there is a risk that the vehicle will be stolen.

Therefore, in the present application, the risk of theft is avoided. Hereinafter, the embodiment thereof will be described with reference to the flowchart of FIG. FIG. 7 is a flowchart showing an operation executed by the on-board unit type anti-theft device 1.
In FIG. 7, when the user completes a purpose such as running a vehicle, stops the engine, and then turns off the vehicle system by operating the input device 5, the flow starts (step ST700).

The on-board unit type anti-theft device 1 confirms whether or not the automatic switching to the prohibited state of ID authentication is set after the vehicle system is turned off (step ST701). When there is an automatic switching setting, ID authentication (ID authentication request transmission) of the on-board unit type anti-theft device 1 is prohibited (step ST702). After that, the standby state is set, and after the vehicle system is turned on, the flow from step ST500 in FIG. 5 is started.

In the ID authentication prohibited state, even if a third party attempts a relay attack, the process cannot proceed to step ST502 or later in FIG. That is, the ID authentication is not successful, the engine cannot be started, and the risk of the vehicle being stolen can be suppressed.

As described above, according to the vehicle anti-theft system 100 according to the first embodiment, it is possible to provide a vehicle anti-theft system that improves the anti-theft property without requiring complicated operations.

In addition, it is possible to prevent erroneous detection of the relay attack, and it becomes unnecessary to take measures to improve the detection accuracy of the relay attack, and it is possible to suppress the cost increase for a vehicle having a small number of antennas such as a two-wheeled vehicle.

Embodiment 2.
Next, the vehicle theft prevention system according to the second embodiment will be described. The configuration of the vehicle theft prevention system according to the second embodiment is the same as that of the first embodiment. Here, with reference to the flowcharts of FIGS. 8 and 9, ID authentication of the portable device in the vehicle theft prevention system is performed. Explain how to ban.
FIG. 8 is a flowchart showing an operation executed by the on-board unit type anti-theft device 1 of the vehicle anti-theft system 100 according to the second embodiment.
The on-board unit type anti-theft device 1 of the vehicle anti-theft system 100 according to the second embodiment starts the flow when the engine is stopped and the vehicle system is turned off (step ST800).

After the engine is stopped, it is confirmed whether or not the user can automatically switch to the ID authentication prohibited state that can be set in advance (step ST801). When the automatic switching to the ID authentication prohibition state is set, the in-vehicle device type anti-theft device 1 sends the ID authentication prohibition request 3A to the portable device 2 (step ST802), and receives the ID authentication prohibition request response 4A from the portable device 2. (Step ST803).

FIG. 9 is a flowchart showing an operation of switching the portable device 2 to prohibit ID authentication. The portable device 2 is normally in a power-on state and in a standby state (step ST900). When the portable device 2 from which the flow is started receives the ID authentication prohibition request 3A from the in-vehicle device type anti-theft device 1 (step ST901), the portable device 2 transmits an ID authentication prohibition request response 4A to the in-vehicle device type anti-theft device 1 (step). ST902). After that, when an appropriate time elapses, the portable device 2 is in the ID authentication prohibited state and ends the flow (step ST903).

Normally, after the engine is stopped and the vehicle system is turned off, the transmission / reception of the ID authentication prohibition request 3A and the ID authentication prohibition request response 4A of the on-board unit type anti-theft device 1 and the portable device 2 is performed until the user is separated from the vehicle by a certain distance. That is, it is designed to be completed while the distance between the portable device 2 and the on-board unit type anti-theft device 1 is within a certain value. If the on-board unit type anti-theft device 1 does not receive the ID authentication prohibition request 3A from the portable device 2, that is, if the ID authentication prohibition state cannot be switched, the display device 6 is driven to notify the user. I do.

Further, in the vehicle anti-theft system 100, in order to set the automatic switching to ID authentication prohibition, the user can set it by using, for example, the second input device 8 of the on-board unit type anti-theft device 1. For example, if the second input device 8 (for example, a button switch) is in the off state, ID authentication is prohibited, and if the second input device 8 is on, the ID authentication prohibition is released. (A state in which ID authentication is permitted).

If the portable device 2 is in the ID authentication prohibited state, it responds to the ID authentication request 1A from the on-board unit type anti-theft device 1 by responding to a signal including information in the ID authentication prohibited state, or by prohibiting the response itself. , ID authentication is not successful in step ST504 of FIG.

As described above, according to the vehicle theft prevention system 100 according to the second embodiment, the same effect as that of the first embodiment can be obtained, and the user does not need to operate the portable device 2 to change to the ID authentication prohibited state. Yes, it is possible to prevent forgetting to operate and improve the anti-theft property.

Embodiment 3.
Next, the vehicle theft prevention system according to the third embodiment will be described. The configuration of the vehicle theft prevention system according to the third embodiment is the same as that of the first embodiment or the second embodiment. Here, the vehicle anti-theft system is described with reference to the flowcharts of FIGS. 10 and 11. The method of canceling the ID authentication prohibition will be described.
First, the user operates the third input device 17 (for example, a button switch) of the portable device 2 to cancel the ID authentication prohibition (ID authentication is permitted).

When the user starts the engine, it is necessary to cancel the ID authentication prohibition. In the present embodiment, the ID authentication prohibition is normally lifted by a simple operation of the portable device 2 worn by the regular user. Easy to do.

FIG. 10 is a flowchart showing an operation executed by the portable device 2 among the flowcharts at the time of canceling the ID authentication prohibition in the vehicle theft prevention system 100. Further, FIG. 11 is a flowchart showing the operation executed by the on-board unit type anti-theft device 1 in the vehicle anti-theft system 100 among the flowcharts at the time of canceling the ID authentication prohibition.

In FIG. 10, if the power of the portable device 2 is turned on, the flow starts (step ST1000) and the portable device 2 is in the standby state. When the user's operation is detected in the third input device 17 of the portable device 2 (step ST1001), it is determined whether or not the input matches the ID authentication prohibition release condition (ST1002).

If the ID authentication prohibition release condition is satisfied, the ID authentication prohibition release request 4B is transmitted from the portable device 2 to the in-vehicle device type anti-theft device 1 (step ST1003), and the flow is terminated (step ST1004). If the ID authentication prohibition release condition is not satisfied, the input value from the third input device 17 is obtained again (step ST1001).

Here, in the third input device 17 of the portable device 2, the ID authentication prohibition state can be confirmed by inputting to the third input device 17 of the portable device 2 before the user inputs the ID authentication prohibition release condition. .. For example, it is possible to notify the user from the vehicle of the ID authentication prohibition state by blinking the display device 6 or the like by inputting in the third input device 17 of the portable device 2.

Next, in FIG. 11, the on-board unit type anti-theft device 1 starts the flow (step ST1100) and receives the ID authentication prohibition release request 4B (step ST1101). The ID authentication prohibition release unit 14 of the on-board unit type anti-theft device 1 determines whether or not the received ID authentication prohibition release request 4B is normal. That is, it is determined whether or not the received ID matches the ID of the paired portable device 2 (step ST1102). If the received ID matches the ID of the paired portable device 2, the prohibition of ID authentication is released (step ST1103), and the flow ends (step ST1104). Similarly, it is also possible to change to the ID authentication prohibited state by a simple operation of the portable device 2.

As described above, according to the present application, the on-board unit type anti-theft device 1 that performs ID authentication for starting the engine and the portable device 2 that transmits the authentication ID (ID authentication request response) are in a pairing relationship. In the vehicle anti-theft system 100, it is possible to provide a vehicle anti-theft system in which the cost and the size of the system are not increased, the operation is less complicated, and the anti-theft property is improved.

Further, in the above-described embodiment, the anti-theft device for a saddle-mounted vehicle has been described, but it may be applied to a ship and a special vehicle, and it goes without saying that the same effect is obtained. Further, in the above-described embodiment, the engine has been described as an example as the power source of the vehicle, but it goes without saying that even if the engine is a motor, the same action and effect can be obtained.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not exemplified are envisioned within the scope of the techniques disclosed in the present application. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 In-vehicle anti-theft device, 2 portable device, 3 engine control device, 4 vehicle, 5 input device, 6 display device, 7 first input device, 8 second input device, 9, 15, 21 signal transmission unit 10, 16, 20 signal receiving unit, 11, 18, 23 control unit, 12, 19, 24 storage device, 13 ID authentication prohibition unit, 14 ID authentication prohibition release unit, 17 third input device, 22 fourth Input device, 100 vehicle anti-theft system, 1A ID authentication request, 2A ID authentication request response, 3A ID authentication prohibition request, 4A ID authentication prohibition request response, 4B ID authentication prohibition cancellation request.

Claims (11)

An on-board unit type anti-theft device that sends an ID authentication request that requests ID authentication,
A portable device that receives the ID authentication request transmitted from the on-board unit type anti-theft device and transmits an ID authentication request response including an ID authentication prohibition signal to the on-board unit type anti-theft device.
Equipped with
A vehicle theft prevention system characterized by automatically switching to a state in which ID authentication is prohibited after the vehicle system is stopped. The vehicle theft prevention system according to claim 1, wherein the transmission of the ID authentication request is automatically prohibited. The vehicle theft prevention system according to claim 1 , wherein the ID authentication request response is switched to a state including the ID authentication prohibition signal by a signal from the on-board unit type anti-theft device. The vehicle theft prevention system according to claim 1, wherein the transmission of the ID authentication request response is automatically prohibited. The vehicle theft prevention system according to claim 4 , wherein the transmission of the ID authentication request response is prohibited by the signal from the on-board unit type anti-theft device. The vehicle theft prevention system according to claim 2, wherein the transmission prohibited state of the ID authentication request can be canceled and the transmission prohibited state can be switched by a signal from the portable device. Wherein the input to the mobile device, a vehicle theft prevention system according to claim 1, characterized in that the signal of the ID authentication prohibition cancellation, and it is possible to set. The vehicle theft prevention system according to claim 4 , wherein the transmission prohibited state of the ID authentication request response can be canceled and the transmission prohibited state can be switched by inputting to the portable device. The vehicle theft prevention system according to any one of claims 1 to 8 , wherein the user is notified by a signal from the portable device whether or not ID authentication is prohibited. The vehicle theft prevention system according to any one of claims 1 to 9 , wherein the user can select whether or not to switch to the prohibited state of the ID authentication after the vehicle system is stopped. The vehicle theft prevention system according to any one of claims 1 to 10 , wherein when the vehicle system is stopped, the user is notified of the success or failure of the ID authentication prohibited state.

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