德国P+F电感式传感器，UB500-18GM75-1-V15
对于噪声免疫力，插在前面的脉冲输入滤波器
的频率转换器。输入频率（包括噪声
高于这个滤波器的极限频率的频率）
不能再进行处理。该设备然后检测
静止（无脉冲） 。这种不受欢迎的情况可以
可以避免的，如果低于测量安全边际
保持设备的频率。在这种情况下，它也
重要的是要注意的窄脉冲的脉冲宽度。
频率测量功能
后部分介绍了检测的动态脉冲
信号（频率测量） 。相关设备的功能
可供任何应用方案。
停顿和转速监测
跳闸值监测涉及到监测是否
输入频率低于（闵报警）或高于
（马克斯报警）给定的跳闸值。
小/报警
在闵报警的情况下（见图23） ，
测量值进行监控未能达成
跳变点，而报警监控该值是否
超标。输入滞后，以防止输出
不断改变其状态时测得的值
点附近的振荡。的操作模式可以是
交换机的输出是否是主动或被动选择
的跳闸点到达。
By forming a mean value over several cycles, it is possible
to damp the signal, although larger variations will still be
apparent. Eff ects with diff erent cycle durations generally
only occur with non-symmetrically formed segment plates;
even diff erently aligned screw heads on a shaft can lead to
variations in cycle duration. That is why it often makes sense
to work with just one operation element per revolution at
higher rotational speeds.
Limits to the Procedure for Measuring Cycle
What happens if the rotational speed drops sharply, i. e. the
machine brakes quickly? To begin with, it is not possible to
detect any further pulses. An integrated measuring procedure
must be activated for this purpose. Even when the machine
is stopped, the frequency cannot be immediately set to 0 Hz.
In theory, the asymptotically decreasing process can take an
infi nite amount of time.