Research on vibration sensor based on giant magnetoresistance effect

Abstract

The subject of the studies presented in this paper is the principle and test of a novel giant magnetoresistance (GMR) effect sensor. We designed and developed a new type of vibration sensor using the GMR sensor chip SS501A based on the GMR effect; the sensor has the advantages of small volume, low cost, low power consumption, simple manufacturing process, and so on. The designed GMR sensor is calibrated by a vibration table; the effective bandwidth of the sensor is 6 Hz–284.2 Hz. Experiments indicate that the sensor has a wide bandwidth, and the output is stable. Under the same experimental conditions, the output is higher than that of the moving coil geophone.