Patent ID: 9658245
Date: 2017-05-23
CPC Classifications: G01P

Claim:
1. An impact detection circuit comprising: a first detection section adapted to detect presence or absence of an impact input based on a first output signal as an output signal in a first detection axis of an inertial sensor having the first detection axis and a second detection axis different from each other; a second detection section adapted to detect presence or absence of an impact input based on a second output signal as an output signal in the second detection axis; and an impact detection determination section adapted to determine that an impact input has been made in a case in which both of the first detection section and the second detection section have detected the presence of the impact input, wherein the first detection section detects the presence of the impact input in a case in which the first output signal has exceeded a first reference value and then falls below the first reference value in at least one of a positive direction or a negative direction of the first detection axis, and the second detection section detects the presence of the impact input in a case in which the second output signal has exceeded a second reference value and then falls below the second reference value in at least one of a positive direction or a negative direction of the second detection axis.