振动速度传感器幅频特性改进方法的研究

Research on Methods of Improvement for Amplitude/Frequency Characteristic of Vibration Velocity Transducer

介绍对磁电式振动传感器幅频特性改进的方法。首先对磁电式振动速度传感器的特性进行了分析 ,列出了传递函数 ,然后设计出与该传递函数相关的函数作为补偿环节 ,与原传感器串联后可得到平坦的输出特性。利用软件设计数字滤波器和用硬件设计模拟滤波器可使传感器的下限工作频率降低 ,满足工程上超低频振动测量的要求。

The methods of improvement for amplitude/frequency characteristic of vibration transducer are introduced.First,the characteristic of magnetoelectric vibration velocity transducer is analyzed and the transfer function is listed. Then the function related to this transfer function is designed as the compensation element. By connecting with existing transducer in serial, the flat output characteristic is obtained. With the digital filter designed by software and analog filter designed by hardware,the lower operating frequency of the transducer is cut down. Thus the requirement of measurement of ultralow frequency is satisfied.