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Anti-theft system and method

  • US 7,961,081 B2
  • Filed: 05/21/2004
  • Issued: 06/14/2011
  • Est. Priority Date: 05/22/2003
  • Status: Expired due to Fees
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First Claim
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1. A system for detecting unauthorized movement of a vehicle, the system comprising:

  • a cellular transmission network;

    a GPS subsystem adapted to determine at least a first pre-activation position of said vehicle and at least a second position of said vehicle when said vehicle is moved from said first pre-activation vehicle position, said GPS subsystem being further adapted to generate and transmit a first vehicle position signal representing said first pre-activation vehicle position and a second vehicle position signal representing said second vehicle position;

    a vehicle anti-theft subsystem, said anti-theft subsystem including a first computer processing unit (CPU), first storage means in communication with said first CPU, a GPS receiver, an omni-directional GPS antenna, an omni-directional cellular antenna, a movement sensor and vehicle immobilizing means,said movement sensor being in communication with said first CPU and adapted to generate and transmit at least a first movement signal when said vehicle is moved from said first pre-activation vehicle position to said second vehicle position,said GPS antenna being adapted to receive said first and second vehicle position signals from said GPS system,said GPS receiver being in communication with said GPS antenna and said first CPU and adapted to receive said first and second vehicle position signals from said GPS antenna, said GPS receiver being further adapted to transmit said first and second vehicle position signals to said first CPU,said first CPU being programmed to receive an activation signal to activate said anti-theft subsystem, receive said first and second vehicle position signals and said first movement signal, generate a first alarm signal and an immobilizing signal in response to said first movement signal, transmit said immobilizing signal to said vehicle immobilizing means, and transmit said first alarm signal, said second vehicle position signal and a unique vehicle identification code to said cellular antenna, said identification code being stored in said storage means;

    a monitoring station having a second CPU, at least second storage means, a first modem-transceiver and a second modem-transceiver,said second storage means being in communication with said second CPU and including at least a first control algorithm and operating instructions associated therewith,said first modem-transceiver being in communication with said second CPU, a first communication network and a remote dispatch station,said second modem-transceiver being in communication with said second CPU and said cellular transmission network and adapted to receive said first alarm signal, said second vehicle position signal and said vehicle identification code from said cellular antenna via said cellular transmission network, said second modem-transceiver being further adapted to transmit said first alarm signal, said second vehicle position signal and said vehicle identification code to said second CPU,said second CPU being programmed and adapted to receive said first alarm signal, said second vehicle position signal and said vehicle identification code from said second modem-transceiver, transmit said first alarm signal, said second vehicle position signal and said vehicle identification code to said dispatch station via said first modem-transceiver, and control transmissions from said first modem-transceiver to said dispatch station; and

    a two-way pager system, said pager system being adapted to receive said first alarm signal from said vehicle anti-theft subsystem, said pager system being further adapted to generate and transmit an activation signal to said anti-theft subsystem to activate said anti-theft subsystem.

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