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研究液氢涡轮泵这类系统的动特性,需要解决在超低温环境下的振动测量问题。美国ENDEVCO公司已研制出专门的超低温振动传感器。为了及时地解决某典型液氢泵的测振问题,我们用PZT5材料做的普通压电振动传感器和电压放大器组成的测振系统成功地解决了-220℃环境下的振动测量。一,原理和方法在常温条件下,如图1所示电荷测振系统的输出电压
To study the dynamic characteristics of liquid hydrogen turbo-pumps such systems needs to solve the problem of vibration measurement in ultra-low temperature environment. US ENDEVCO company has developed a special ultra-low temperature vibration sensor. In order to solve the vibration problem of a typical liquid hydrogen pump in time, the vibration measurement system consisting of a common piezoelectric vibration sensor and a voltage amplifier made of PZT5 material has successfully solved the vibration measurement under the environment of -220 ° C. First, the principle and method At room temperature, as shown in Figure 1 Charge Vibration System output voltage