Security device
First Claim
Patent Images
1. A security device, comprising:
- a portable transmission unit for transmitting a start or stop security signal, and for transmitting a sensor circuit characteristic signal;
a receiving unit disposed on an automobile for receiving the security signal and the sensor circuit characteristic signal from the transmission unit;
a sensor disposed on the automobile for detecting an abnormal event occurring to the automobile and for providing an alarm signal indicative of the abnormal event;
a sensor circuit having adjustable sensitivity characteristics for receiving the alarm signal output from the sensor and for generating a security control signal; and
a security control section for receiving the security control signal and for causing a theft prevention device to be activated after the security control signal from the sensor circuit is received;
wherein the sensitivity characteristics of said sensor circuit can be adjusted by said sensor circuit characteristic signal sent by the transmission unit.
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Abstract
A security device includes a portable transmission unit that gives an instruction to start or stop security, a sensor that detects an abnormality of a tuner which receives a signal from the transmission unit and of an automobile, a sensor circuit having predetermined characteristics for discriminating the output of the sensor, and a security control section for causing a theft prevention device like a siren to be activated after output from the sensor circuit is received, wherein the characteristics of the sensor circuit can be set by the transmission unit.
9 Citations
6 Claims
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1. A security device, comprising:
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a portable transmission unit for transmitting a start or stop security signal, and for transmitting a sensor circuit characteristic signal; a receiving unit disposed on an automobile for receiving the security signal and the sensor circuit characteristic signal from the transmission unit; a sensor disposed on the automobile for detecting an abnormal event occurring to the automobile and for providing an alarm signal indicative of the abnormal event; a sensor circuit having adjustable sensitivity characteristics for receiving the alarm signal output from the sensor and for generating a security control signal; and a security control section for receiving the security control signal and for causing a theft prevention device to be activated after the security control signal from the sensor circuit is received; wherein the sensitivity characteristics of said sensor circuit can be adjusted by said sensor circuit characteristic signal sent by the transmission unit. - View Dependent Claims (2, 3, 4, 5)
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6. A security device, comprising:
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a portable transmission unit for transmitting a start or stop security signal, and for transmitting a sensitivity control signal; a receiving unit for receiving the start or stop security signal and the sensitivity control signal from the transmission unit; a sensor that detects an abnormality of an automobile; a control section having an armed mode and a disarmed mode, said control section ignoring signals from the sensor in the disarmed mode, and said control section judging the presence or absence of an abnormality of the sensor according to the output level of the sensor in the armed mode, said control section also causing a theft prevention device to be activated when it is determined that an abnormality has occurred, and said control section also having means for adjusting the relationships between the output level of said sensor and the level at which the control section determines that an abnormality has occurred when the control section is in the armed mode; wherein the means for adjusting of the control section can be adjusted by manually selecting said sensitivity control signal transmitted by the transmission unit.
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Specification