Proper selection of accelerometer sensitivity to avoid saturation in vibration measurements

摘要

Accelerometers are often selected for use with instruments based on their frequency range, size, weight, mounting and cost without enough attention paid to their sensitivities. The sensitivity of an accelerometer is inversely proportional to the peak amplitude range. In certain applications, high acceleration amplitudes or high frequency noise may be present to overload the transducer causing severe signal distortion and large "ski slope" response. In this paper, the proper selection of accelerometer sensitivity, two types of ski-slope spectrum and measurement considerations are discussed. Case histories of high peak acceleration amplitude and ski-slope due to integration noise are presented.