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Method and apparatus for securing car against theft via wireless sensor

  • US 20070109108A1
  • Filed: 11/13/2006
  • Published: 05/17/2007
  • Est. Priority Date: 11/15/2005
  • Status: Active Grant
First Claim
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1. A method for securing car against theft via wireless sensor, comprising the steps of providing a charging circuit and a chargeable battery, a CPU circuit, a transmission circuit, and an air pressure sensor in a cigarette-lighter plug;

  • mounting and connecting an antitheft main unit to a power source in a car;

    setting said main unit to an active state;

    plugging said cigarette-lighter plug in a cigarette-lighter socket on the car, so that said air pressure sensor built in said cigarette-lighter plug detects any change of air pressure in the car due to door open, trunk open, glass broken, big shock and sends out a signal to said CPU circuit;

    encoding said trigger signal sent by said air pressure sensor at said CPU circuit; and

    transmitting said encoded trigger signal via said transmission circuit to said antitheft main unit to trigger a siren.

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