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在环境噪声和振动控制工作中,测量振动参数(如加速度、速度和位移)的方法很多。常用的测量系统一般由四个基本单元组成,即振动传感器→前置放大器→分析器→显示记录器。振动源所产生的振动讯号,首先被振动传感器接收而转换成相应的交流电讯。因此,振动传感器也就是一种把振动的机械能转换成电能的换能器。由传感器出来的振动电讯号送到前置放大器中,后者的主要作用是进行阻抗变换,讯号调节(放大或衰减)以及在加速度、速度和位移参数之间进行微积分模拟电路的变换。随后输送到分析器中,再通过不同的电路对被测讯号进行检波和频率分析,即检波出讯号的峰值、平均值或有效值,以及进行频率(或频带)的滤波分析。
There are many ways to measure vibration parameters (such as acceleration, velocity and displacement) in the work of environmental noise and vibration control. Commonly used measurement system generally consists of four basic units, namely, vibration sensor → preamplifier → analyzer → display recorder. Vibration signal generated by the vibration source, the vibration sensor is first received and converted into the corresponding AC telecommunications. Thus, a vibration sensor is also a transducer that converts vibratory mechanical energy into electrical energy. The vibrating electrical signal from the sensor is sent to a preamplifier whose main function is to perform impedance transformations, signal conditioning (amplification or attenuation), and transformation of the calculus analogue circuit between acceleration, velocity and displacement parameters. And then sent to the analyzer, and then through the different circuits on the detected signal detection and frequency analysis, which detected the peak signal, the average or RMS, and the frequency (or band) filtering analysis.