The amplitude of an oscillation can be defined by its path (s), velocity (v) and acceleration (ɑ) values.
These 3 values have a consistent relationship with one another and can be converted from one to the other using simple calculations.
The B&R sensors measure oscillation acceleration. The unit is m/s2. The acceleration is also often specified with the unit g (1 g = 9.81 m/s2) for the acceleration due to gravity.
For some diagnoses, however, the oscillation velocity or oscillation path is more meaningful. The acceleration can then be passed converted to the oscillation velocity through integration. The path can be calculated from the acceleration by using integration twice.
T一个振荡的振幅可以由其路径（s）、速度（v）和加速度（ɑ）值定义。
这3个值之间具备一定的关系，可以通过简单的计算从一个值转换到另一个值。
B&R传感器测量振荡加速度。其单位是m/s2。加速度也经常用g（1g=9.81m/s2）为单位，表示重力引起的加速度。
F然而，对于某些诊断来说，振荡速度或振荡位移更有意义。然后加速度可以通过积分转换为振荡速度。位移可以通过两次积分从加速度计算出来。
Mathematical relationship
数学关系
Displacement 位移 |
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Oscillation velocity 振荡速度 |
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振荡加速度 |
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Information: 注意: Displacement is not calculated by the module. 该模块不计算位移。 |
Fig.: The s-v-a relationship
图: s-v-a 的关系
A harmonic oscillation can be clearly described by its amplitude, frequency and phase angle.
•The amplitude in the path, velocity or acceleration indicates the instantaneous value.
•The frequency describes how often an oscillation changes within one second. In oscillation diagnostics, this plays an important role since many frequencies can be assigned to one cause.
•The phase angle refers to the starting point of the oscillation. This is usually not that important since in most cases several oscillations are present.
谐波振荡可以通过其振幅、频率和相位角来清楚地描述
•位移、速度或加速度中的振幅表示瞬时值。
•频率描述了一个振荡在一秒钟内变化的频率。在振荡诊断中，这起着重要的作用，因为许多频率可以被指定为同一个原因。
•相位角指的是振荡的起始点。这通常不是很重要，因为在大多数情况下有几个振荡同时存在。