Patent ID: 6216070
Filing Date: 2001-04-10
Classification: B60R

Abstract:
A passenger protection apparatus comprising:a first acceleration sensor;a second acceleration sensor, the polarity of the output of the second acceleration sensor being opposite to that of the first acceleration sensor;comparing means for comparing the output of the second acceleration sensor with a predetermined standard value, and generating a switch signal when the output exceeds the standard value;collision judging means for estimating whether the collision is grave or not, on the basis of the output of the first acceleration sensor;first AND gate means for receiving the output of the comparing means calculated for the first AND gate means, and the output of the collision judging means calculated for the first AND gate means;second AND gate means for receiving, independently from the first AND gate means, the output of the comparing means calculated for the second AND gate means, and the output of the collision judging means calculated for the second AND gate means;a squib; anda first switching circuit, which is connected with the squib in series and is controlled so as to turn on, according to the outputs of the first AND gate means;a second switching circuit, which is connected with the squib in series and is controlled so as to turn on, according to the outputs of the second AND gate means.