Vehicle theft detection system
First Claim
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1. The vehicle theft detection system that is provided in a vehicle, the vehicle theft detection system comprising:
- at least two types of sensors, which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state;
a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors;
an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor;
a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means;
a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means;
a lock state sensing means for sensing a locked state and an unlocked state of a door of the vehicle; and
a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle,wherein the determining means receives a measurement output from the vertical movement sensing acceleration sensor,wherein when the determining means senses the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor, the determining means does not determine that the vehicle is in a stolen state until the unlocked state of the door is sensed by the lock state sensing means, andwherein the determining means determines that the vehicle is in the stolen state when the vertical movement sensing acceleration sensor does not sense the acceleration in the vertical direction of the vehicle for a predetermined time period even in a case where the lock state sensing means does not sense the unlocked state of the door.
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Abstract
A tilt sensor, height sensors and tire pressure sensors sense a behavior of a parked vehicle and output an angle signal, a height signal and a pressure signal, respectively. These sensor signals are obtained by a sensor signal obtaining section. An initial value setting section sets an initial sensor signal of each of the tilt sensor, the height sensors and the tire pressure sensors as an initial value of that sensor. Then, a comparing section compares each initial value with the current sensor signal. Based on a result of the comparison, a determining section determines whether the vehicle is stolen.
23 Citations
25 Claims
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1. The vehicle theft detection system that is provided in a vehicle, the vehicle theft detection system comprising:
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at least two types of sensors, which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state; a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors; an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor; a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means; a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means; a lock state sensing means for sensing a locked state and an unlocked state of a door of the vehicle; and a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle, wherein the determining means receives a measurement output from the vertical movement sensing acceleration sensor, wherein when the determining means senses the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor, the determining means does not determine that the vehicle is in a stolen state until the unlocked state of the door is sensed by the lock state sensing means, and wherein the determining means determines that the vehicle is in the stolen state when the vertical movement sensing acceleration sensor does not sense the acceleration in the vertical direction of the vehicle for a predetermined time period even in a case where the lock state sensing means does not sense the unlocked state of the door. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 18)
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12. The vehicle theft detection that is provided in a vehicle, the vehicle theft detection system comprising:
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at least two types of sensors, which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state; a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors; an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor; a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means; a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means; a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle; and at least one tilt sensing acceleration sensor, which is provided to sense an acceleration in at least one of a plurality of horizontal directions of the vehicle, wherein the determining means receives a measurement output from the vertical movement sensing acceleration sensor and senses a vertical movement of the vehicle based on the measurement output of the vertical acceleration sensor; wherein the determining means determines that the vehicle is not stolen when the vertical movement of the vehicle is sensed through the vertical movement sensing acceleration sensor; wherein the determining means, the vertical movement sensing acceleration sensor, and the at least one tilt sensing acceleration sensor form a tilt sensor that senses a tilt of the vehicle; wherein the determining means determines that the vehicle is in the stolen state upon satisfaction of the following two conditions; the determining means senses the tilt of the vehicle based on a measurement output of the at least one tilt sensing acceleration sensor; and the determining means does not sense the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor; and wherein the determining means does not determine that the vehicle is in the stolen state when the determining means senses the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor even in a case where the determining means senses the tilt of the vehicle based on the measurement output of the at least one tilt sensing acceleration sensor.
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14. The vehicle theft detection system that is provided in a vehicle, the vehicle theft detection system comprising:
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at least two types of sensors, which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state; a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors; an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor; a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means; a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means; a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle; and at least one tilt sensing acceleration sensor, which is provided to sense an acceleration in at least one of a plurality of horizontal directions of the vehicle, wherein the determining means receives a measurement output from the vertical movement sensing acceleration sensor and senses a vertical movement of the vehicle based on the measurement output of the vertical acceleration sensor; wherein the determining means determines that the vehicle is not stolen when the vertical movement of the vehicle is sensed through the vertical movement sensing acceleration sensor; wherein the determining means includes a first control means and a second control means; wherein the first control means and the at least one tilt sensing acceleration sensor form a tilt sensor that senses a tilt of the vehicle; wherein the vertical movement sensing acceleration sensor is provided outside of the tilt sensor; wherein the first control means supplies a signal, which indicates a relatively high possibility of stealing of the vehicle, to the second control means when the first control means senses the tilt of the vehicle based on a measurement output of the at least one tilt sensing acceleration sensor; wherein the second control means determines that the vehicle is in the stolen state when the second control means receives the signal, which indicates the relatively high possibility of stealing of the vehicle, from the second control means as long as the second control means does not sense the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor; and wherein the second control means determines that the vehicle is not in the stolen state when the second control means senses the vertical movement of the vehicle based on the measurement output of the vertical movement sensing acceleration sensor even in a state where the second control means receives the signal, which indicates the relatively high possibility of stealing of the vehicle, from the first control means.
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16. The vehicle theft detection system that is provided in a vehicle, the vehicle theft detection system comprising:
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at least two types of sensors. which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state; a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors; an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor; a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means; a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means; a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle; at least one tilt sensing acceleration sensor, which is provided to sense an acceleration in at least one of a plurality of horizontal directions of the vehicle; and a theft sensor, which is different from the tilt sensor, wherein the determining means receives a measurement output from the vertical movement sensing acceleration sensor and senses a vertical movement of the vehicle based on the measurement output of the vertical acceleration sensor; wherein the determining means determines that the vehicle is not stolen when the vertical movement of the vehicle is sensed through the vertical movement sensing acceleration sensor; wherein the determining means includes a first control means and a second control means; wherein the first control means, the vertical movement sensing acceleration sensor and the at least one tilt sensing acceleration sensor form a tilt sensor that senses a tilt of the vehicle; wherein the first control means supplies a signal, which indicates information of the acceleration in the at last one of the plurality of horizontal directions of the vehicle and the acceleration in the vertical direction of the vehicle, to the second control means based on the measurement output of the at least one tilt sensing acceleration sensor and the measurement output of the vertical movement sensing acceleration sensor; wherein the second control means determines whether the vehicle is in the stolen state based on the information of the acceleration in the at least one of the plurality of horizontal directions of the vehicle and the acceleration in the vertical direction of the vehicle; wherein the second control means receives a measurement output of the theft sensor; and wherein when the signal, which is received from the first control means, indicates that the vertical movement of the vehicle is sensed, the second control means does not determine that the vehicle is in the stolen state even in a case where the measurement output of the theft sensor indicates a relatively high possibility of stealing of the vehicle.
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19. The vehicle theft detection system that is provided in a vehicle, the vehicle theft detection system comprising:
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at least two types of sensors, which sense a behavior of the vehicle in a parked state and outputs a corresponding sensor signal that indicates the sensed behavior of the vehicle in the parked state; a sensor signal obtaining means for obtaining the sensor signal from each of the at least two types of sensors; an initial value setting means for setting an initial sensor signal of each of the at least two types of sensors, which is initially obtained by the sensor signal obtaining means upon parking of the vehicle, as an initial value of the sensor; a comparing means for comparing each initial value, which is set by the initial value setting means, with a current sensor signal of a corresponding one of the at least two types of sensors, which is currently obtained by the sensor signal obtaining means; a determining means for determining whether the vehicle is stolen based on a comparison result, which is made by the comparing means; a map information obtaining means for obtaining map information; a coordinate information obtaining means for obtaining a current position of the vehicle as coordinate information; a position recognizing means for recognizing the current position of the vehicle as a position of the vehicle on a map, which is generated based on the map information that is obtained by the map information obtaining means, wherein the position recognizing means recognizes the current position of the vehicle as the position of the vehicle on the map according to the map information, which is obtained by the map information obtaining means, and the coordinate information, which is obtained by the coordinate information obtaining means; and a judging means for judging whether the position of the vehicle on the map recognized by the position recognizing means is in a predetermined position or range, wherein when the judging means judges that the position of the vehicle on the map is not in the predetermined position or area, the determining means determines whether the vehicle is stolen based on angle information, which is outputted from the tilt sensor, wherein the at least two types of sensors include; a tilt sensor that senses a tilt of the vehicle and outputs an angle signal based on the sensed tilt of the vehicle; and at least one height sensor that senses an amount of stroke of at least one of a piston rod and a spring of a shock absorber, which is provided in a corresponding one of a plurality of suspensions of the vehicle, wherein based on the sensed amount of stroke of the at least one of the piston rod and the spring, the at least one height sensor outputs a height signal, which corresponds to a distance between a vehicle body and a corresponding one of a plurality of tires of the vehicle. - View Dependent Claims (20, 21, 22, 23)
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24. A vehicle theft detection system comprising:
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a tilt sensor that senses a tilt of a parked vehicle and outputs an angle information based on the sensed tilt of the vehicle; a map information obtaining means for obtaining map information; a coordinate information obtaining means for obtaining a current position of the vehicle as coordinate information; a position recognizing means for recognizing the current position of the vehicle as a position of the vehicle on a map, which is generated based on the map information that is obtained by the map information obtaining means, wherein the position recognizing means recognizes the current position of the vehicle as the position of the vehicle on the map according to the map information, which is obtained by the map information obtaining means, and the coordinate information, which is obtained by the coordinate information obtaining means; a judging means for judging whether the position of the vehicle on the map recognized by the position recognizing means is in a predetermined position or range; and a determining means for determining whether the vehicle is stolen based on the angle information, which is outputted from the tilt sensor, when the judging means judges that the position of the vehicle on the map is not in the predetermined position or area.
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25. A vehicle theft detection system comprising:
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at least one tilt sensing acceleration sensor, which is provided to sense an acceleration in at least one of a plurality of horizontal directions of a parked vehicle; a vertical movement sensing acceleration sensor that senses an acceleration in a vertical direction of the vehicle; and a determining means for determining whether the vehicle is stolen based on a measurement output of the at least one tilt sensing acceleration sensor and a measurement output of the vertical movement sensing acceleration sensor, wherein the determining means determines that the vehicle is stolen upon satisfaction of the following two conditions; the measurement output of the at least one tilt sensing acceleration sensor indicates a tilt of the vehicle; and the measurement output of the vertical movement sensing acceleration sensor does not indicate vertical movement of the vehicle.
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Specification