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Description: For ultrasonic applications vulnerable to noise interference and attenuation of ultrasonic signals in the effects of space and thus require ultrasonic sensors work best features in its characteristics, demonstrated that the drive pulse signal of the control accuracy of the sensor characteristics of the work, given the sensor-driven signal pulse width and frequency sensors of the best relationship between the proposed use of complex programmable logic device (CPLD) have a sensor-driven control signal approach, the method is applied to one ultrasonic flowmeter measurement system has been more than traditional single-chip control circuit better control precision and control.
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