Passenger restraint system with an electronic crash sensor
First Claim
Patent Images
1. A collision detecting system comprising:
- a. electronic sensor means mounted on a motor vehicle member for generating an electrical input signal substantially to the acceleration of said vehicle member;
b. first signal processing means for receiving the electrical input signal from said electronic sensor and generating a jerk signal indicative of the jerk of said member, said first signal processing means generating a first trigger signal responsive to a jerk signal of a preselected value, said first signal processing means including;
(i) differentiating means for differentiating said electrical input signal to generate said jerk signal,(ii) means for generating the magnitude of said jerk signal,(iii) first summing means for generating a first difference signal dependent on the difference between the magnitude of said jerk signal and a first reference selected independently from said electrical input signal,(iv) first integrating means for integrating said first difference signal to generate a first integrated signal, said integrating means being constructed such that said first integrated signal never has a negative value, and(v) first comparator means for comparing said first integrated signal to a second reference selected independently from said electrical input signal;
c. second signal processing means for receiving the electrical input signal from said electronic sensor and generating a signal indicative of a change in acceleration of said member, said second signal processing means generating a second trigger signal responsive to a change in acceleration of said member of a preselected value, said second signal processing means including;
(i) summing means for obtaining a second difference signal between said electrical input signal a third reference signal selected independently from said electrical input signal,(ii) integrating means for integrating said second difference signal over time to generate a second integrated signal, said integrating means being constructed such that said second integrated signal never has a negative value, and(iii) comparator means for comparing the second integrated signal with a fourth reference signal selected independently from said electrical input signal; and
d. triggering means for triggering a passenger protection means in response to either said first trigger signal or said second trigger signal.
5 Assignments
0 Petitions
Accused Products
Abstract
An electronic accelerometer is used to generate an acceleration signal for a passenger restraint system in a motor vehicle. The electrical signal is processed by emulating an electromechanical sensor to detect crashes. The electrical signal may also be differentiated to obtain a jerk signal also used to detect abnormal accelerations.
-
Citations
7 Claims
-
1. A collision detecting system comprising:
-
a. electronic sensor means mounted on a motor vehicle member for generating an electrical input signal substantially to the acceleration of said vehicle member; b. first signal processing means for receiving the electrical input signal from said electronic sensor and generating a jerk signal indicative of the jerk of said member, said first signal processing means generating a first trigger signal responsive to a jerk signal of a preselected value, said first signal processing means including; (i) differentiating means for differentiating said electrical input signal to generate said jerk signal, (ii) means for generating the magnitude of said jerk signal, (iii) first summing means for generating a first difference signal dependent on the difference between the magnitude of said jerk signal and a first reference selected independently from said electrical input signal, (iv) first integrating means for integrating said first difference signal to generate a first integrated signal, said integrating means being constructed such that said first integrated signal never has a negative value, and (v) first comparator means for comparing said first integrated signal to a second reference selected independently from said electrical input signal; c. second signal processing means for receiving the electrical input signal from said electronic sensor and generating a signal indicative of a change in acceleration of said member, said second signal processing means generating a second trigger signal responsive to a change in acceleration of said member of a preselected value, said second signal processing means including; (i) summing means for obtaining a second difference signal between said electrical input signal a third reference signal selected independently from said electrical input signal, (ii) integrating means for integrating said second difference signal over time to generate a second integrated signal, said integrating means being constructed such that said second integrated signal never has a negative value, and (iii) comparator means for comparing the second integrated signal with a fourth reference signal selected independently from said electrical input signal; and d. triggering means for triggering a passenger protection means in response to either said first trigger signal or said second trigger signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
Specification