| 摘要 |
An apparatus (30) and method for detecting a cut-off frequency of a pulse signal (First Pulse Signal) is provided to detect a cut-off frequency of a pulse signal, in a case a frequency of an inputted pulse signal exceeds a maximum rated speed due to various reasons including noises generated by a system environment or an encoder, or system design error, whereby an appropriate action thereto can be taken, the apparatus (30) including an input processor (31) configured to generate a second pulse signal at a time when a rising edge and a falling edge of a first pulse signal appear, in a case the first pulse signal, which is a pulse signal of a monitoring object, is inputted, a counter (32) configured to count a clock signal relative to the second pulse signal generated by the input processor, a reset processor (33) configured to reset the counter at every predetermined (set) period, and a detector (34) configured to generate and output a cut-off frequency of a detection signal, in a case an output value of the counter exceeds a predetermined (set) threshold during the predetermined period. |
