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“接地回路”是引起测振系统测量误差的最常见起因之一.由“接地”电流产生的乱真信号或不期望信号,沿着传感器和信号调节器之间的常规通道或屏蔽通路流动,对真实振动信号产生干扰.这些电流产生于多个不同接地点的不同电位,并在常规或屏蔽通道中引起电压降,表示为误差E,由监测器读到的振动信号就包括这个值.(见图1)与周围电气设备的连线也可能产生磁致感应误差信号.图1说明这种常见问题经常在
The “ground return” is one of the most common causes of measurement errors in a vibration measurement system.A spurious or unwanted signal produced by a “ground” current flows along the normal path or shield path between the sensor and the signal conditioner, Real vibration signals interfere with each other and these currents are generated at different potentials at several different earthing points and cause a voltage drop in the normal or shielded path, expressed as error E, which is included in the vibration signal read by the monitor. Figure 1) The connection to the surrounding electrical equipment may also produce a magnetically induced error signal Figure 1 illustrates this common problem often