Aufprall- oder Beschleunigungssensor

摘要

A shock sensor detects shocks or accelerations from all directions in a plane. A coil (24) produces a magnetic field (M). A magnetic fluid (25) is sealed in a closed container located in the magnetic field. A magnetoresistive effect element (22) is also located in the magnetic field (M) and opposes the magnetic fluid. The magnetic fluid (25) moves relative to the magnetoresistive effect element (22) when the magnetic fluid receives a shock. When the magnetoresistive effect element (22) is subjected to a change in magnetic field (M), the resistance of the magnetoresistive effect element (M) changes. The magnetoresistive effect element (M) may be formed of four elements (R1-R4) in a bridge configuration and the output of the bridge is processed in an output circuit. The output circuit outputs a sensor output when the magnetic fluid (M) moves relative to the magnetoresistive effect element (22).