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<< 点击显示目录 >> 主页 振动监测 > X20(c)CM4810使用手册 > 状态监测/振荡分析 - Condition monitoring / Oscillation analyses > 振动测量技术 - Oscillation measurement technology > 传感器技术 - Sensor technology |
Oscillation sensors convert the mechanical oscillations of the machines being monitored into electrical signals.
For the most part, structure-borne sound, i.e. the sound that spreads through a solid object, is measured.
The acceleration measured within the scope of the condition monitoring is typically measured with piezoelectric sensors. The oscillation sensors being used utilize the piezoelectric properties of quartz or certain ceramics. The actual measured value is a force that is proportional to the acceleration.
The piezoelectric effect involves a charge separation when a force acts on the piezoelectric material. This is in proportion to the force and is consequently proportional to the acceleration. Piezoelectric quartz or piezoelectric ceramic is used as the piezoelectric material. The output signal is an electrical charge that is specified in pC (picocoulombs). A charging amplifier is necessary in order to convert the charge into a voltage signal.
The Integrated Electronics Piezo Electric (IEPE) technology used in B&R sensors strengthens the signal directly in the sensor and emits it as a low-resistance voltage signal. Sensor sensitivity is specified in mV/g.
1 g = 9.81 m/s2 (gravitational acceleration)
振荡传感器将被监测机器的机械振荡转换为电信号。
在大多数情况下，测量的是结构传播的声音，即通过固体物体传播的声音。
在状态监测范围内测量的加速度通常使用压电传感器测量。所使用的振荡传感器利用石英或某些陶瓷的压电特性。实际测量值是一个与加速度成比例的力。
压电效应涉及到当一个力作用于压电材料时的电荷分离。这与力成正比，因此与加速度成正比。
压电石英或压电陶瓷被用作压电材料，输出信号是以pC（皮库仑）为单位的电荷。为了将电荷转换为电压信号，需要一个电荷放大器。
B&R 传感器中使用的集成电子压电（IEPE）技术直接增强传感器中的信号，并将其作为低电阻电压信号发射。传感器灵敏度以mV/g为单位。
1 g = 9.81 m/s2 (重力加速度)
Information: 注意:
Piezoelectric sensors cannot measure static magnitudes. 压电传感器不能测量静态幅度。 |