Vibration displacement measurement based on three axes accelerometer

This paper introduces a novel method of measuring vibration displacement using three axes accelerometer, which effectively overcomes the shortcomings of traditional measurement method based on single axis accelerometer. Firstly, the frequency domain method is used to remove the trend items and noises in the three axes acceleration signals. Then, the three axes accelerations are fused for the resultant acceleration. Secondly, the resultant acceleration is converted into the acceleration spectrum by Fourier transform, and then the acceleration spectrum is transformed into displacement spectrum. Thus, the amplitude, circular frequency and phase angle of the displacement spectrum are obtained. Furthermore, the inverse Fourier transform is adopted for changing the displacement spectrum signal into time domain signal. Finally, an experimental platform for vibration detection based on industrial Ethernet is set up to verify the effectiveness of the proposed algorithm. Experimental results demonstrate the effectiveness and practicality of the proposed algorithm.