论文部分内容阅读
近年来虽然使用了某些电子式测振仪,但由于盖格尔测振仪非常适合于低频范围的振动位移测量,因而仍应用于测试和记录中低速发动机轴系的扭转振动。众所周知,盖格尔扭振仪划笔在纸带上的划迹对于分析来说显得小些,因此试验结果必须进行放大,和用手工或其他设备分解成简谐分量。这一工作是困难而费力的。为了把记录笔的运动转换成易于处理的电信号,在盖格尔扭振仪的传动杆端部粘接一个薄金属园板,并在其旁边安置一个电涡流传感器。电信号可以经过导线传送到振动测量设备示波器和微处理机,后者将发动机轴系的振动信号进行采样和以 FFT 算法将信号分解成简谐分量。文中介绍了使用一个既能产生电信号又能同时在纸带上画出波形的盖格尔扭振仪对一个柴油机推进装置进行扭转振动测量的试验结果。
Although some electronic vibrometers have been used in recent years, the Geiger vibrometer is still suitable for testing and recording the torsional vibrations of medium and low speed engine shafts because it is well suited for vibration displacement measurement in the low frequency range. It is well known that the demarcation of the Geiger torsion pen on the tape is smaller for the analysis and that the test results must be magnified and resolved into the harmonic components by hand or other equipment. This work is difficult and laborious. In order to convert the motion of the stylus pen into an easy-to-handle electrical signal, a thin metal garden plate is glued to the end of the Geisel Torsion Vibrometer transmission rod and an eddy current sensor is placed next to it. Electrical signals can be routed through the oscilloscope and microprocessor to the vibration measurement equipment, which samples the vibration signals of the engine shaft system and decomposes the signals into simple harmonic components using the FFT algorithm. This paper describes the test results of a torsional vibration measurement of a diesel propulsion device using a Geiger torsion oscillator that can generate both electrical signals and waveforms on the tape at the same time.