基于磁场检测的振动测量方法研究

Research of Vibration Testing Method Based on Detection of Electromagnetic Field

摘要: 基于磁阻效应原理，在将机械振动转化为磁场信号变化的基础上，提出了一种基于磁场检测的振动测量方法。将磁体联接于振源，利用磁敏电阻检测周围空间磁场的变化，从而获得振源的振动幅值等参量。利用设计的信号处理单元电路以及搭建的测试平台对此方法进行了实际测试，测试结果表明：所测波形周期为1.17 s，振幅呈指数规律衰减，是一种阻尼振动，从而验证了提出方法的可行性。

Abstract: On the basis of magnetic resistance effect and converting the single of mechanical vibration into the magnetic field changes, a vibration testing method based on detection of electromagnetic field is proposed. The vibration amplitude and other parameters of the seismic focus with a magnet can be measured by using magnetic resistance to detect the change of electromagnetic field around the space of it. To test this method, the circuit of single processing unit and the test platform are built. The results indicate that the cycle of the measured waveform is 1.17s, and the amplitude attenuates according to the index rule, which show that the measured vibration is the damped vibration. Therefore, the method proposed is verified feasible.