JP4428279B2 - Vehicle antitheft device - Google Patents

Description

  The present invention relates to a vehicle antitheft device that performs antitheft operation to prevent unauthorized use or theft of a vehicle.

2. Description of the Related Art Conventionally, a vehicle theft detection device that detects an inclination of a vehicle by an inclination sensor and issues an alarm is known (for example, see Patent Document 1). When the theft detection device is set to the multi-story parking mode, it will not be alarmed even if the tilt sensor detects it when it is parked in the multi-story parking lot, and the tilt due to shaking or tilting when entering and leaving the multi-story parking lot This is to prevent erroneous detection of the sensor.
JP 2003-34233 A

  However, according to the disclosure and suggestion of the above-described prior art, switching to the multi-story parking mode that ignores the tilt detection by the tilt sensor must be performed by the user's manual operation with the remote controller, and the multi-story parking lot is entered and exited. Each time manual switching is required, the user may feel annoyed.

  Then, an object of this invention is to provide the antitheft device for vehicles which improves a user's convenience.

In order to solve the above problems, according to one aspect of the present invention,
Having a theft detection means for detecting an abnormality of the vehicle caused by the vehicle theft,
In the vehicle anti-theft device for performing a predetermined anti-theft operation when an abnormality is detected by the anti-theft means,
Altitude measuring means for measuring the altitude of the vehicle;
Control means for prohibiting the anti-theft operation when the altitude measuring means observes a predetermined altitude change within a predetermined time when an abnormality is detected by the theft detecting means. A vehicle antitheft device is provided. As a result, when a change in the predetermined altitude is observed in the vehicle, the anti-theft operation is not performed even if an abnormality is detected by the theft detection means, so that it is not necessary to switch the mode by a user's manual operation.

  The theft detection means is preferably an inclination detection means for detecting the inclination of the vehicle. As a result, the anti-theft operation is restricted by a predetermined altitude change, so that it is possible to prevent the inclination detecting means from erroneously detecting the inclination of the vehicle caused by movement by a pallet such as tower parking or stacking by a crane on a ferry or the like. it can.

  Further, the theft detection means is preferably a moving body detection means for detecting a moving object in the passenger compartment. Thereby, since the anti-theft operation is restricted by a predetermined altitude change, it is possible to prevent the moving body detection means from erroneously detecting shaking of the mascot or the like in the vehicle caused by movement by a pallet such as tower parking.

  According to the present invention, user convenience can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is an example of a configuration diagram of a vehicle antitheft device of the present invention.

  There is an altitude measuring device 1 as an altitude measuring means for measuring the altitude of the vehicle. For example, a barometric altimeter that measures altitude using changes in atmospheric pressure, and a radio altimeter that measures altitude using the time until a radio wave emitted toward the ground returns. Alternatively, the altitude of the vehicle may be measured using GPS (Global Positioning System) surveying. GPS surveying uses a GPS receiver installed at a reference observation point (fixed point) and a target observation point (moving point) to receive signals from GPS satellites at the same time. It is a surveying method that determines the position by transferring to a moving point using an apparatus or the like and immediately performing baseline analysis on the moving point side. That is, the fixed point is considered as a predetermined base station on the ground, and the moving point may be regarded as a vehicle.

  There is a theft detection sensor as a theft detection means for detecting a vehicle abnormality caused by the vehicle theft. As the theft detection sensor, there are a moving object detection sensor 2, an inclination sensor 3, and an alarm sensor 4.

  There is a moving object detection sensor 2 as a moving object detection means for detecting a moving object in the passenger compartment. For example, a moving object is detected using ultrasonic waves or the like. In addition, it is also possible to detect a moving object using a load sensor provided under a camera or a seat. By using such a moving body detection sensor 2, it is basically possible to detect suspicious movements in the passenger compartment of a person or the like who breaks the window glass and enters without opening the door.

  There is an inclination sensor 3 as an inclination detection means for detecting the inclination of the vehicle. For example, the inclination of the vehicle is detected by using a liquid level displacement of a sealed fluid or the like. In addition, the inclination of the vehicle can be detected by using a G sensor or a gyro sensor capable of detecting a relatively small G (acceleration) variation (for example, ± 1 G). By using such an inclination sensor 3, it is basically possible to detect an unnatural inclination such as jack-up or wrecker movement associated with vehicle or tire theft.

  The alarm sensor 4 is a sensor that can be used as a general theft detection sensor or theft detection sensor other than the moving object detection sensor 2 and the tilt sensor 3. For example, a courtesy switch that detects opening / closing of passenger doors, engine hoods, and luggage doors, a battery removal detection sensor that can detect battery removal, a door lock detection switch, a key switch, and an ECU (door ECU) that monitors these sensors and switches And engine ECU).

  Based on the measurement / detection information from the altitude measuring device 1, the moving object detection sensor 2, the inclination sensor 3, and the alarm sensor 4, the control unit 5 performs anti-theft measures such as alarm activation and engine start failure according to predetermined alarm start conditions. Control the operation. It is composed of a CPU, RAM, ROM for storing programs, and the like. The specified alarm start condition is that when any door other than the key or transmitter is unlocked from the lock, when the battery is removed without following the specified procedure, all the doors are locked closed. For example, when a moving body is detected in the vehicle interior in a state, when an inclination angle of a predetermined value or more is detected in the vehicle in a state where all doors are fully closed and locked.

  The alarm device 6 is, for example, a signal lamp, a horn, an engine hood lock switch, or the like, and performs an alarm operation (for example, hazard lamp blinking, horn sounding, forced locking operation) based on a command from the control unit 5. As a result, unauthorized use such as unlocking due to fraud, intrusion into the vehicle, and wrecker movement, and theft are suppressed.

  Now, an example of the operation of the vehicle antitheft device of the present invention will be specifically described with reference to FIGS.

  FIG. 2 is a process flow of a first example of the control unit 5 of the vehicle antitheft device of the present invention. The control unit 5 is a theft detection sensor (moving object detection sensor 2, tilt sensor 3 and alarm sensor 4) in a state where the user leaves the vehicle and the warning mode is set (a state in which the vehicle is alarmed against theft). It is determined whether or not there is an abnormality in the vehicle based on the detection information from (step 10). If there is no abnormal detection information, the control unit 5 determines that there is no fear of vehicle theft, and does not issue a command to perform an alarm operation to the alarm device 6 (step 16). On the other hand, if there is abnormal detection information in at least one of the theft detection sensors, the control unit 5 determines that there is a possibility of vehicle theft. The control unit 5 that has determined that there is a possibility of vehicle theft acquires vehicle altitude information measured by the altitude measuring instrument 1 and whether or not a predetermined altitude change (for example, several m / sec) has been observed within a predetermined time. Is determined (step 12). When an altitude change is observed, the control unit 5 determines that the vehicle is in an exceptional parking mode such as movement by a pallet such as tower parking or stacking by crane on a ferry, etc. A command to perform the operation is not performed (step 16). On the other hand, when the predetermined altitude change is not observed, the control unit 5 instructs the alarm device 6 to perform an alarm operation based on the abnormality detection by the theft detection sensor (step 14).

  Therefore, according to the processing flow of FIG. 2, when a change in a predetermined altitude is observed in the vehicle by the altitude measuring device 1, no alarm operation is performed even if an abnormality is detected by the theft detection sensor. Since it is not necessary for the user to manually switch to an operation mode that prevents operation, the convenience of the user is improved.

  FIG. 3 is a processing flow of a second example of the control unit 5 of the vehicle antitheft device of the present invention. The control unit 5 determines whether or not there is an abnormality in the vehicle based on the detection information from the alarm sensor 4 in a state where the user leaves the vehicle and the warning mode is set (step 30). If there is no abnormal detection information, the control unit 5 determines that there is no fear of theft of the vehicle, and does not issue a command to perform an alarm operation to the alarm device 6 (step 38). On the other hand, when there is abnormal detection information by the alarm sensor 4, the control unit 5 determines whether there is abnormal detection information by the moving object detection sensor 2 or the tilt sensor 3 (step 32). If no abnormality is detected in either the moving body detection sensor 2 or the tilt sensor 3, the control unit 5 instructs the alarm device 6 to perform an alarm operation based on the abnormality detection by the alarm sensor 4 (step 36). On the other hand, if there is an abnormality detected in either the moving object detection sensor 2 or the tilt sensor 3, the control unit 5 acquires vehicle altitude information measured by the altitude measuring instrument 1, and changes a predetermined altitude (for example, within a predetermined time). , Several m / second) is determined (step 34). When an altitude change is observed, the control unit 5 determines that the vehicle is in an exceptional parking mode such as movement by a pallet such as tower parking or stacking by crane on a ferry, etc. A command to perform the operation is not performed (step 38). On the other hand, if the predetermined altitude change is not observed, a command to perform an alarm operation is issued to the alarm device 6 based on the abnormality detection by the alarm sensor 4 (step 36).

  Therefore, according to the processing flow of FIG. 3, if an abnormality is detected by the alarm sensor 4 (for example, detection of door opening by the courtesy switch), an alarm operation is performed by the alarm device 6 in principle. When a change in the predetermined altitude is observed in the vehicle, no alarm action is performed even if an abnormality is detected by the moving object detection sensor 2 or the tilt sensor 3, and if no change in the predetermined altitude is observed, either the moving object detection sensor 2 or the tilt sensor 3 is detected. If any abnormality is detected, an alarm operation is performed. That is, it is possible to prevent the moving object detection sensor 2 and the inclination sensor 3 from erroneously detecting the shaking of the mascot in the vehicle and the inclination of the vehicle caused by movement by a pallet such as tower parking and stacking by a crane on a ferry. Then, it distinguishes between detection of mascots in the vehicle caused by pallet movement such as tower parking, etc. and crane tilting to the ferry, etc., and detection of vehicle theft due to wrecker movement that does not cause altitude change. Therefore, the alarm operation is surely performed.

  FIG. 4 is a processing flow of a third example of the control unit 5 of the vehicle antitheft device of the present invention. The control unit 5 determines whether the alert mode is set or not (no alert against vehicle theft) based on its own alert mode flag or the like (step 50). The alert mode flag is an internal flag of the control unit 5 that becomes valid when the alert mode is set. And if it is in alert mode, the control part 5 will acquire the height information of the vehicle measured by the height measuring device 1, and the predetermined height change (for example, several m / sec) was observed within the predetermined time. Is determined (step 52). When the predetermined altitude change is observed, the control unit 5 disables the detection by the moving object detection sensor 2 and the tilt sensor 3 until the warning mode is unset (step 38). On the other hand, if the predetermined altitude change is not observed, the process returns to the beginning of the processing flow.

  Therefore, according to the processing flow of FIG. 4, when the altitude measuring device 1 observes a change in the predetermined altitude in the vehicle during the alert mode, the control unit 5 detects the moving object detection sensor 2 and the tilt sensor 3 during the alert mode. , And the control of a predetermined anti-theft operation is performed based on the vehicle abnormality detection information only by the alarm sensor 4. That is, to prevent the moving object detection sensor 2 and the inclination sensor 3 from erroneously detecting the mascot in the vehicle and the inclination of the vehicle caused by the movement of the pallet such as tower parking and the crane piled up on the ferry and the like during the warning mode. Can do. And, it is possible to distinguish between detection of shaking of the mascot or the like in the vehicle caused by movement by a pallet such as tower parking, and detection of vehicle theft by wrecker movement that does not cause a change in altitude. The anti-theft operation is surely performed.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  The alarm device 6 of the above-described embodiment may include a wireless communication unit that can communicate with the outside of the vehicle. Based on a command from the control unit 5, the police, an emergency center, a security service provider, or the like is notified that a fraud has occurred in the vehicle via wireless communication. Further, the contents of the report instructed from the control unit 5 are automatically transmitted to these report destinations. For example, the number is automatically dialed to 110 or 119. Then, as information that can specify the vehicle position, an address, latitude, longitude, and the like acquired by the navigation system or the like are transmitted by a call by automatic voice.

It is an example of the block diagram of the vehicle antitheft device of this invention. It is a processing flow of the 1st example of the control part 5 of the antitheft device for vehicles of the present invention. It is a processing flow of the 2nd example of the control part 5 of the antitheft device for vehicles of this invention. It is a processing flow of the 3rd example of the control part 5 of the antitheft device for vehicles of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Altitude measuring device 2 Moving body detection sensor 3 Inclination sensor 4 Alarm sensor 5 Control part 6 Alarm device

Claims (3)

Having a theft detection means for detecting an abnormality of the vehicle caused by the vehicle theft,
In the vehicle anti-theft device for performing a predetermined anti-theft operation when an abnormality is detected by the anti-theft means,
Altitude measuring means for measuring the altitude of the vehicle;
Control means for prohibiting the anti-theft operation when the altitude measuring means observes a predetermined altitude change within a predetermined time when an abnormality is detected by the theft detecting means. Anti-theft device for vehicles.   The vehicle antitheft device according to claim 1, wherein the theft detection means is an inclination detection means for detecting the inclination of the vehicle.   2. The vehicle antitheft device according to claim 1, wherein the theft detection means is a moving body detection means for detecting a moving object in a vehicle interior.

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