in this system, a frequency-adjustable ultrasonic drive signal is made by computer, then based on the motor' s revolution number, system can automatically find the syntonic frequency of motor.
在此系统中,首先使用计算机来产生一个频率可调的超声波驱动信号,然后通过对马达转数的检测,系统得到压电超声马达的最佳谐振频率值。