Vehicle security system with speed sensor and door interlock

Details Vehicle security system with speed sensor and door interlock Vehicle security system with speed sensor and door interlock

1990-12-17

1992-11-03

Ng, Jin F.

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

340430, B60R 2510

Patent

active

051609142

ABSTRACT:
A vehicle security system includes a portable transmitter unit for transmitting either an arming signal or a disarming signal, a receiver unit mounted on the vehicle for receiving the arming or disarming signal from the transmitter unit, a detector for detecting vehicle speed, an arming-signal reception monitor unit capable of receiving the arming signal from the transmitter unit provided that the vehicle is not in motion, and a security control unit activated to arm the system in response to the arming signal transmitted from the transmitter unit when the arming-signal reception monitor unit can receive the arming signal. The system can be armed by on the arming signal from the transmitter unit only when the vehicle has zero speed and a door of the vehicle has just been opened or closed. Therefore, the security system is reliably prevented from being armed while the vehicle is being driven (i.e., has a measurable speed) and can also be armed if the vehicle is parked even if the ignition switch is turned on.

REFERENCES:
patent: 4383242 (1983-05-01), Sassover
patent: 4691801 (1987-09-01), Mann et al.
patent: 4866417 (1989-09-01), Defino et al.
patent: 4922224 (1990-05-01), Drori et al.

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