Research And Realization Of An Ultrasonic Cleaner With Constant Power And Frequency Tracing

"Cavitation effect" will happen if great ample ultrasonic energy is transmited in liquit. When plussing the ultrasonic frequency vibration up washing liquit,stretching and compression phenomenon will appear in liquid inside. The stretched Iiquit will create air bubbles,while the pressed Iiquit will crush the bubbles.The principle of ultrasonic washing is to come into being "cavitation effect". The powerful creating and crushing force can purge impurities,dirtetc.With ultrasonic washer,the cleaning speed is faster and the efficiency can be improved.The automation is achieved in the operation and workers have not to touch washing fluid,so it is safe and reliable and save the labour power.The little air bubbles may reach the interstices,apertures and shelter of parts to clean,so it is more wide-applicated.lt is good to wash effect.Tests display that ultrasonic washing machines may obtain better effect,comparing with the ways of puffing,infiltrating,steaming and brushing.Ultrasonic transducer is the part of producing ultrasound and supersonic power offers energy to the transducers.The ultrasonic cleaners is to plus square wave signal of 50% on the matching circuit. This design adopts the frequency tracing to make the whole system work in the resonance,causing that the whole set attains optimum work efficiency.By means of regulating the width of fluctuation voltage,the power inspection circle can control the output power ,so that the system can make the output power changeless.As being opulent and cheap,TL494 is choose as VCO.High Vceo VMOS is choose in the D generic power amplifier circle. The drive of VMOS adopts a paraphase transformer.Since ultrasonic transducers' property,the matching circuit embodys two parts:One is power matching ,the other is attune matching.The former is for the sake of making export impedance of power match the load.This Adopts the transformer matching means.The latter is to make the transducer present only the quality of resistance.To get this,a inductor in series means is Adopted.This thesis introduces the design project,design of hardware and software,unit circles and experimentations of main unit circles in detail.