Activation device for passenger protection system and acceleration sensor module therefor

摘要

An acceleration sensor module is provided with sensor chips, first and second collision check sections and an OR circuit so that accelerations in different detection directions can be detected. The sensor chips of the acceleration sensor module can thus be used as a redundancy sensor in an activation device for a passenger protection system. The passenger protection system is thus prevented form being erroneously activated by only an output signal of a microcomputer, because the first switch section is controlled by both outputs of the acceleration sensor module and the microcomputer.