Design of Excitation Circuits in Ultrasonic Transducers for Fouling Detection

Based on the description and analysis of Ultrasonic technique used for fouling detection, ultrasonic excitation circuits was designed. The ultrasonic excitation circuits are composed of the timer chip circuit to generate resonant wave, and high-speed MOSFET drivers to control MOSFET. The circuits produce high-voltage pulse wave with capacitor instantaneous electric discharge, and generate high-pressure continuous wave with the power supply voltage act on the transducer directly. The experiment proved that the electric circuits can produce about the 300V pulse voltage, and meet the specification and request to detect pipe surface fouling completely.