System for preventing collision of vehicles
First Claim
1. An anti-crash system for a vehicle comprising:
- a brake actuator of said vehicle;
a radar system mounted on said vehicle for generating a relative speed signal representative of a relative speed between said vehicle and an obstacle in front of said vehicle and a relative distance signal representative of a relative distance between said vehicle and said obstacle;
a brake signal-generating logic circuit connected to said radar system for producing a brake signal in response to said relative speed and relative distance signals;
means for comparing said relative speed signal with a first predetermined reference value and for producing a higher speed signal when said relative speed signal exceeds said first reference value;
means for comparing said relative distance signal with a second predetermined reference value and for producing a blind zone signal when said relative distance signal is lower than said second reference value;
means connected for receiving said blind zone signal and said higher speed signal and for generating a first holding signal when receiving both said blind zone signal and said higher speed signal;
means connected for receiving said braking signal and said blind zone signal and for generating a second holding signal when receiving both said braking signal and said blind zone signal;
means for generating a brake holding signal in response to either one of said first and second holding signals; and
means for driving said brake actuator in response to either one of said braking signal or said brake holding signal.
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Accused Products
Abstract
A system for preventing collision wherein a radar system is mounted on a vehicle for generating a relative speed signal and a relative distance signal. There are provided a brake signal generating logical circuit responsive to the relative speed signal and the relative distance signal for actuating a brake actuator, first and second comparators for comparing the relative speed signal and the relative distance signal respectively with reference signals, and an information processing signal responsive to the outputs from the first and second comparators for actuating the brake actuator. There is also provided a braking signal releasing circuit for disenabling the brake actuator after the vehicle has stopped.
16 Citations
7 Claims
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1. An anti-crash system for a vehicle comprising:
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a brake actuator of said vehicle; a radar system mounted on said vehicle for generating a relative speed signal representative of a relative speed between said vehicle and an obstacle in front of said vehicle and a relative distance signal representative of a relative distance between said vehicle and said obstacle; a brake signal-generating logic circuit connected to said radar system for producing a brake signal in response to said relative speed and relative distance signals; means for comparing said relative speed signal with a first predetermined reference value and for producing a higher speed signal when said relative speed signal exceeds said first reference value; means for comparing said relative distance signal with a second predetermined reference value and for producing a blind zone signal when said relative distance signal is lower than said second reference value; means connected for receiving said blind zone signal and said higher speed signal and for generating a first holding signal when receiving both said blind zone signal and said higher speed signal; means connected for receiving said braking signal and said blind zone signal and for generating a second holding signal when receiving both said braking signal and said blind zone signal; means for generating a brake holding signal in response to either one of said first and second holding signals; and means for driving said brake actuator in response to either one of said braking signal or said brake holding signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification