JP4525522B2 - Vehicle antitheft device - Google Patents

Description

  The present invention relates to a vehicle antitheft device.

Conventionally, as this type of vehicle antitheft device, a device that estimates the wrecker movement or tire theft by detecting the inclination of the vehicle and issues a warning is used. In such a case, there is a problem that an alarm operation is performed due to the shaking of the vehicle. On the other hand, when the multi-story parking mode is set by the operator, it is possible to suppress malfunction by determining whether or not to perform an alarm operation without considering the information of the tilt sensor that detects the tilt of the vehicle. It is known (see, for example, Patent Document 1).
JP 2003-34233 A

  However, in the above conventional vehicle antitheft device, the operator has to set and cancel the three-dimensional parking mode by himself / herself, and there is a problem that the operation becomes complicated.

  The present invention has been made to solve such problems, and a main object of the present invention is to provide a vehicle antitheft device that suppresses malfunctions and improves user convenience.

In order to achieve the above object, the first aspect of the present invention includes a detection means for detecting a vehicle shake, an alarm means for giving an alarm regarding the state of the vehicle, and a warning state for determining that a predetermined warning state has been reached. An anti-theft device for a vehicle which has a determination means and issues an alarm based on the shaking of the vehicle when in a predetermined alert state until a first predetermined time elapses after it is determined that the predetermined alert state has been reached If the vehicle shake detected by the detecting means during this period exceeds a predetermined value, an alarm based on the vehicle shake is not performed. According to the first aspect of the present invention, it is possible to suppress an alarm operation due to the shaking of the vehicle based on transportation or the like when parked in a multi-story parking lot or a ferry without an operator's operation. In addition, the second aspect of the present invention includes a detecting means for detecting a vehicle shake, an alarm means for giving an alarm relating to the state of the vehicle, and a warning state determining means for determining that a predetermined warning state has been reached. The anti-theft device for a vehicle that performs an alarm based on the shaking of the vehicle when in a predetermined alert state, wherein the shaking of the vehicle detected by the detecting means is greater than the shaking of the vehicle that serves as a reference for alarming When the value is equal to or higher than a predetermined value, an alarm based on the shaking of the vehicle is not performed. According to the second aspect of the present invention, it is possible to suppress an alarm operation due to a shake greater than a shake of a vehicle that may be caused by a theft, which may be caused by ferry transportation, without an operator's operation. be able to.

  In the first or second aspect of the present invention, the detection means may be a means for detecting the inclination of the vehicle as a shake of the vehicle, or a means for detecting the acceleration of the vehicle as a shake of the vehicle. Good.

  In the first or second aspect of the present invention, when the detecting means is means for detecting the inclination of the vehicle as a vehicle shake, the inclination of the vehicle detected by the detecting means becomes the inclination of the vehicle serving as a reference for alarming. If the vehicle inclination detected by the detection means becomes equal to or greater than a predetermined value before the predetermined time elapses, the alarm based on the vehicle inclination may be stopped. In such a case, it is already started or started, because it may be detected that the reference inclination for warning is reached before the reference inclination for limiting the alarm action is detected. It is preferable to stop the warning operation that is preparing for the above.

  According to a third aspect of the present invention, there is provided an acceleration detection means for detecting the acceleration of the vehicle, an inclination detection means for detecting the inclination of the vehicle, and a warning state determination means for determining that the vehicle has entered a predetermined warning state. An anti-theft device for a vehicle that performs an alarm based on the inclination of the vehicle when in a predetermined alert state, and an acceleration detection means between the time when it is determined that a predetermined alert state has been reached and the first predetermined time has elapsed When the acceleration of the vehicle detected by the above becomes a predetermined value or more, an alarm based on the inclination of the vehicle is not performed. According to a fourth aspect of the present invention, there is an acceleration detection means for detecting the acceleration of the vehicle, an inclination detection means for detecting the inclination of the vehicle, an alarm means for giving an alarm regarding the state of the vehicle, and a predetermined warning state. An anti-theft device for a vehicle that gives an alarm based on the inclination of the vehicle when in a predetermined alert state, and the vehicle acceleration detected by the acceleration detector is a predetermined value. When the value exceeds the value, an alarm based on the inclination of the vehicle is not performed.

  In any aspect of the present invention, the warning state detection means may be means for detecting a predetermined warning state in a state where no passenger is present in the vehicle. Thereby, it is possible to avoid an alarm operation due to the shaking of the vehicle when the passenger gets off.

  ADVANTAGE OF THE INVENTION According to this invention, the antitheft device for vehicles which suppresses a malfunction and improves a user's convenience can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings. FIG. 1 is an example of a configuration diagram illustrating a configuration of a vehicle antitheft device 10 according to an embodiment. The vehicle antitheft device 10 communicates with an electronic control unit (hereinafter referred to as ECU) 20 that controls the entire device, a lock switch 30 disposed near the door handle of the vehicle, a remote control key 32, and a remote control key 32. The transmitter / receiver 33, an alarm device 40 that performs an alarm operation in a predetermined case, an acceleration sensor 50 that detects the acceleration of the vehicle, and a theft alarm sensor 60 are provided.

  The ECU 20 includes, for example, a storage unit including a CPU 21 that executes a program for executing control of the anti-theft operation, a ROM 22 that stores the program, a RAM 23 that temporarily stores a calculation result of the program, and the like. The ECU 20 receives the acceleration α of the vehicle from the acceleration sensor 50, an abnormal signal from the theft alarm sensor 60, and the like, and calculates the change θ of the inclination of the vehicle from the start of the alarm state described later by the acceleration α. is doing. When the alarm state is started under a predetermined start condition, the ECU 20 performs an alarm operation using the alarm device 40 or an engine start based on the input information from the theft alarm sensor 60 and the calculated change in vehicle inclination θ. Controls anti-theft operations such as locking.

  The lock switch 30 is a switch that enables the door to be locked without using a key. When this is operated, a signal is input to the ECU 20 to instruct door lock.

  The remote control key 32 emits a weak radio wave (response signal) in response to a request signal periodically sent from the vehicle-side transceiver 33. When the remote control key 32 is attached to the user and approaches the vehicle, the transceiver 33 receives the response signal of the remote control key 32, and the ECU 20 decodes the response signal (including an ID code unique to the remote control key 32). Input. Based on this input signal (ID code), the ECU 20 authenticates whether or not the user has the regular remote control key 32. If the user having the proper remote control key 32 can be authenticated, a door lock release instruction is output to the body ECU (or door lock actuator) when the lock switch 30 is operated.

  The alarm device 40 is a device that performs an alarm operation when an alarm operation is instructed from the ECU 20, and for example, receives an electric wave from a GPS satellite and transmits an alarm signal together with vehicle position information to another communication facility. A communication terminal, a horn set to ring for a certain time, a signal lamp, or the like can be used.

  The acceleration sensor 50 is a biaxial sensor that is disposed near the center of gravity of the vehicle and detects acceleration in the vehicle longitudinal direction and vehicle lateral direction. The acceleration sensor 50 is a sensor that detects an acceleration α acting on the center of gravity of the vehicle, for example, by detecting distortion generated in the piezoelectric element and outputting an electrical analog signal. The acceleration sensor 50 may be shared with an acceleration sensor used for vehicle behavior control or the like.

  The theft alert sensor 60 is a theft detection sensor that detects an abnormality other than a change in vehicle inclination θ that may occur with the vehicle theft. For example, a courtesy switch that detects opening / closing of a passenger door, an engine hood, or a luggage door, a battery removal detection sensor that can detect battery removal, a door lock detection switch, and the like.

  The vehicle antitheft device 10 of the embodiment determines that the door is locked from the outside of the vehicle by the lock switch 30 until the door is unlocked by receiving a radio wave from the remote control key 32. When the calculated change in vehicle inclination θ is greater than or equal to the threshold value A or when an abnormal signal is input from the theft alarm sensor 60, the alarm device 40 is instructed to perform an alarm operation. Here, the threshold value A is set to a value that can be generated by a tow truck movement, tire theft, or the like, but not generated in a normal parking state. However, the alarm operation instruction is limited so that the alarm operation is not performed due to the shaking of the vehicle based on an event other than the theft, even in the alert state. The specific operation will be described below.

  FIG. 2 is a flowchart illustrating an example of a process flow repeatedly executed by the ECU 20. First, the ECU 20 determines whether or not it is in a warning state based on a warning state flag stored in the RAM 23 according to the operation status of the remote control key 32 (S100).

  When it is determined that it is in a warning state (YES in S100), it is determined whether an abnormal signal is input from the theft warning sensor 60 (S110).

  When an abnormal signal is input from the theft alert sensor 60 (YES in S110), the alarm device 40 is instructed to perform an alarm operation (S160), and one routine of this flow is terminated. As described above, the alarm device 40 instructed to perform the alarm operation performs, for example, an operation of transmitting an alarm signal together with vehicle position information to another communication facility or causing a horn to ring for a certain period of time.

  If an abnormal signal is not input from the theft alert sensor 60 (NO in S110), it is determined whether or not it is a restriction mode that restricts an alarm operation based on the acceleration α (S120). Here, whether or not it is the restriction mode is determined by a restriction mode flag stored in the RAM 23 in the process described later. The restriction mode is reset when a negative determination is made in S100. If it is the restriction mode (YES in S120), no processing is performed and one routine of this flow is terminated.

  If it is not the restriction mode (NO in S120), it is determined whether it is within the time T1 since the warning state is reached and the change θ of the vehicle inclination is not less than the threshold value B1 (S130). Here, the time T <b> 1 is set to a time (for example, 5 to 30 minutes, preferably 10 to 20 minutes, etc.) to the end of conveyance after parking in the multi-story parking lot. In addition, the threshold value B1 is set to a value that can be generated by pallet shaking, turntable rotation, or the like when the multilevel parking lot is stored. It should be noted that the threshold A and the threshold B1 may be larger.

  When it is within the time T1 since the warning state is entered and the change θ of the vehicle inclination is equal to or greater than the threshold value B1 (YES in S130), the vehicle inclination that may occur at the time of entering the multilevel parking lot is detected. And the fact that it is the restriction mode is stored in the RAM 23 by setting a specific numerical value in the restriction mode flag (S170).

  Further, when the time T2 has not elapsed since the previous change in vehicle inclination θ is equal to or greater than the threshold A, the alarm device 40 is instructed to stop the alarm operation (S180, 190), and one routine of this flow is completed. To do.

  On the other hand, if a negative determination is obtained in S130, it is determined whether or not the change in vehicle inclination θ is greater than or equal to the threshold B2 (S140). Here, the threshold value B2 is a value larger than the threshold value A and the threshold value B1 that can be generated by ferry transportation or the like. If the change in vehicle inclination θ is greater than or equal to the threshold value B2, it is determined that a large shake due to ferry transportation or the like has been detected, the processing of S170 and subsequent steps is executed, and one routine of this flow is terminated.

  If a negative determination is obtained in S140, it is determined whether or not the vehicle inclination change θ is equal to or greater than the above-described threshold A (S150), and if the vehicle inclination change θ is equal to or greater than the threshold A, an alarm is issued. The alarm device 40 is instructed to perform the operation (S160), and one routine of this flow is terminated.

  Here, FIG. 3 shows an example of the operation of the vehicle antitheft device 10 according to the embodiment that executes the processing flow of FIG. 2 according to the time change of the change in the inclination θ of the vehicle. In FIG. 3, time t1 represents the time when the alert state is reached, and time t2 represents the time when the alert state is released.

  In FIG. 3A, the change θ of the vehicle inclination becomes equal to or greater than the threshold B1 at time ta within time T1 from t1. As a result, it is determined that the vehicle shake at the time of entering the multi-story parking lot is detected, and the restriction mode is set (S130, 170). At a subsequent time tb, the change θ of the vehicle inclination is equal to or greater than the threshold value A, but since the limit mode is already set, no alarm operation is performed (S120). Thereby, the alarm operation | movement by the fluctuation | variation at the time of the leaving of the subsequent multistory parking lot etc. can also be suppressed.

  In FIG. 3 (2), the change θ of the vehicle inclination becomes equal to or greater than the threshold A at time tc after time T1 has elapsed from t1. In this case, an alarm operation is instructed (S150, 160), but at time td within time T2, the change in the vehicle inclination θ becomes greater than or equal to the threshold value B2, so that a large vehicle shake due to ferry transportation or the like occurs. It is determined that the alarm has been detected, and an instruction to stop the alarm operation is given (S140, 170 to 190), and the subsequent alarm operation is not performed.

  In FIG. 3, the threshold value B1 is illustrated as being smaller than the threshold value A. However, as described above, the magnitude relationship may be reversed. However, the threshold value B2 is larger than the threshold value A and the threshold value B1 due to the nature of the invention.

  As described above, in the vehicle antitheft device 10 according to the embodiment of the present invention, the operator's operation is performed such that the alarm operation is performed due to the shaking of the vehicle such as when entering and leaving the multistory parking lot and during ferry transportation. It can be avoided without it.

  As mentioned above, although the best mode for carrying out the present invention has been described using one embodiment, the present invention is not limited to such one embodiment, and within the scope not departing from the gist of the present invention, Various modifications and substitutions can be made to the above-described embodiment.

For example, the change of the vehicle inclination θ is compared with the threshold values A, B1, and B2 to instruct the alarm operation and set the restriction mode. The acceleration α acting on the vehicle is directly compared with the threshold value. It is also possible to instruct an alarm action or set a restriction mode.
Further, the change θ of the vehicle inclination is calculated based on the acceleration α from the acceleration sensor. For example, a gyro mechanism or a pendulum mechanism is used as the inclination sensor, or the sealed liquid level is electrically detected. It is good also as a thing provided with things.

  In the above-described embodiment, the direction of the vehicle inclination is not particularly mentioned, but the vehicle inclination is determined according to the detection direction of the acceleration sensor 50. For example, in the above-described embodiment, since the biaxial acceleration sensor 50 is used, it is possible to detect the inclination in all directions with respect to the horizontal plane including the roll direction and the pitch direction of the vehicle. Therefore, for example, it is possible to set different threshold values A, B1, and B2 for the respective gradient components in the roll direction and the pitch direction, and one threshold value for the combined component obtained by combining these direction components. It is also possible to set A, B1, and B2.

  Further, it is also possible to use the change θ of the vehicle inclination as a reference for instructing an alarm action while comparing it with a threshold value, and as the reference for setting the limit mode by comparing the acceleration α with another threshold value. For example, in S130 and 140 of the above flow, instead of the inclination θ, the acceleration α is compared with the threshold values B1 ′ and B2 ′ set to the acceleration that is generated at the time of entering the multilevel parking garage, ferry transportation, etc. In S150, it is conceivable to similarly determine the alarm action by comparing the inclination θ with the threshold value A in S150. In this case, as a method for obtaining the inclination θ, the output signal of the acceleration sensor 50 may be used as in the above-described embodiment, or a separate inclination sensor may be provided and the output signal may be used. By taking such an embodiment, a vehicle shake other than the theft is effectively detected by evaluating the acceleration, while a vehicle shake due to the theft is effectively detected by evaluating the change in inclination. In such a case, malfunction can be effectively suppressed.

  In the operation routine of the first embodiment, either S130 or S140 may be omitted. In other words, the limit mode is set only when the acceleration α becomes equal to or greater than the threshold value B1 within the time T1 after entering the alert state, or the limit mode is set only when the acceleration α becomes equal to or greater than the threshold value B2. Good. These also have the same effect.

  Further, the present invention is applicable to any form of door lock and release thereof. That is, in the above-described embodiment, it is determined that there is a warning state from the time when the door is locked from the outside of the vehicle by the lock switch 30 until the door is unlocked by reception of radio waves from the remote control key 32. The key may be inserted into a key cylinder of the door to perform door lock and release thereof, or a switch provided on the remote control key 32 may be operated to perform door lock and release thereof. Furthermore, it is good also as what judges that it is a warning state by events other than a door lock. For example, it may be determined that the vehicle is in a warning state due to the parking brake being actuated or a predetermined time has elapsed since the ignition was turned off.

  Alternatively, the burglar alarm sensor 60 may not be provided, and only an alarm operation based on a change in vehicle inclination θ may be performed. In this case, S110 in the processing flow may be omitted.

  INDUSTRIAL APPLICABILITY The present invention can be used for a vehicle antitheft device that performs an alarm operation based on at least a vehicle shake. The appearance, weight, size, running performance, etc. of the vehicle to be mounted are not limited.

1 is a configuration diagram of a vehicle antitheft device 10 according to an embodiment of the present invention. It is a flowchart showing an example of the processing flow repeatedly performed by ECU20 which concerns on one Example of this invention. It is explanatory drawing which shows an example of operation | movement of the antitheft device 10 for vehicles which concerns on one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Antitheft device for vehicles 20 Electronic control unit 21 CPU
22 ROM
23 RAM
30 Lock Switch 32 Remote Control Key 33 Transmitter / Receiver 40 Alarm Device 50 Acceleration Sensor 60 Theft Warning Sensor

Claims (8)

It has a detecting means for detecting the shaking of the vehicle, an alarm means for giving an alarm about the state of the vehicle, and a warning state judging means for judging that the vehicle has entered a predetermined warning state. When the vehicle is in the predetermined warning state, the vehicle An antitheft device for a vehicle that performs an alarm based on shaking of the vehicle,
If the vehicle shake detected by the detection means is greater than or equal to a predetermined value after the first predetermined time has elapsed since it was determined that the predetermined warning state was reached, then the predetermined warning state An anti-theft device for a vehicle, wherein an alarm based on the shaking of the vehicle is not performed until it is determined that it is not. It has a detecting means for detecting the shaking of the vehicle, an alarm means for giving an alarm about the state of the vehicle, and a warning state judging means for judging that the vehicle has entered a predetermined warning state. When the vehicle is in the predetermined warning state, the vehicle An antitheft device for a vehicle that performs an alarm based on shaking of the vehicle,
When the vehicle shake detected by the detection means is equal to or greater than a predetermined value, which is a value greater than the vehicle shake serving as a reference for warning, an alarm based on the vehicle shake is not performed. Anti-theft device for vehicles.   The vehicle antitheft device according to claim 1 or 2, wherein the detection means is means for detecting the inclination of the vehicle as a shake of the vehicle.   The vehicle antitheft device according to claim 1 or 2, wherein the detecting means is means for detecting the acceleration of the vehicle as a shake of the vehicle.   The vehicle inclination detected by the detection means becomes equal to or greater than the predetermined value after the second predetermined time elapses after the vehicle inclination detected by the detection means reaches the vehicle inclination serving as a reference for warning. 4. The antitheft device for vehicles according to claim 3, wherein an alarm based on the inclination of the vehicle is stopped in the case of an accident. Acceleration detecting means for detecting the acceleration of the vehicle, inclination detecting means for detecting the inclination of the vehicle, alarm means for giving an alarm regarding the state of the vehicle, and warning state determining means for determining that the vehicle has entered a predetermined warning state An antitheft device for a vehicle that performs an alarm based on the inclination of the vehicle when in the predetermined alert state,
When the acceleration of the vehicle detected by the acceleration detecting means is greater than or equal to a predetermined value after the first predetermined time has elapsed since it was determined that the predetermined warning state was reached, it is based on the inclination of the vehicle. An anti-theft device for a vehicle, characterized in that no alarm is given. Acceleration detecting means for detecting the acceleration of the vehicle, inclination detecting means for detecting the inclination of the vehicle, alarm means for giving an alarm regarding the state of the vehicle, and warning state determining means for determining that the vehicle has entered a predetermined warning state An antitheft device for a vehicle that performs an alarm based on the inclination of the vehicle when in the predetermined alert state,
An anti-theft device for a vehicle, wherein an alarm based on the inclination of the vehicle is not performed when the acceleration of the vehicle detected by the acceleration detecting means exceeds a predetermined value. The vehicle antitheft device according to any one of claims 1 to 7 , wherein the warning means is a means for issuing a warning by transmitting the position of the vehicle using GPS to another communication facility .

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