Patent ID: 6600415
Filing Date: 2003-07-29
Classification: G01P,H01H

Abstract:
An emergency-deceleration condition signal control circuit comprising:(a) an emergency-deceleration condition transducer comprising: an insulation house made of an insulation material, in which a closed hollow arc groove is formed, said arc groove having an arc surface; a predetermined amount of mercury injected into said arc groove and changed with the vehicle traveling speed, said mercury being freely movable along said arc surface in said arc groove; and a plurality of metal contacts provided on the said arc surface and led outside of said housing as leading out electrodes, the adjacent metal contacts being turned on and off successively when the mercury is moved from one end contact to the other end contact of said arc surface, said plurality of metal contacts, according to their different positions on the arc surface in the arc groove, being divided into: a normal traveling detection section at the lower portion of said arc surface; an emergency braking detection section at the upper portion of said arc surface; and a collision detection section on the top of said arc surface; (b) a first flip-flop circuit used for receiving a pulse output signal from the emergency braking detection section of said transducer, and flipped for outputting the emergency braking condition information if the pulse signal is detected; (c) a second flip-flop circuit used for receiving an output signal from the collision detection section of said transducer, and flipped for outputting the collision or overturn information if a collision or overturn signal is detected; (d) a time delay circuit for locking the states of the first and second flip-flop circuits after flipped, for a predetermined time; and (e) a pulse generating circuit for receiving an output signal from the normal traveling detection section and for generating during vehicle traveling a pulse signal to reset said first and second flip-flop circuits after the delay times.