Development Of The Portable Digital Ultrasonic Testing Device

Ultrasonic testing is a very important method of NDT(Non-destructive Testing). It has been widely used to control the quality of on-line product, and to inspect equipments and some important parts used. The research of the digital ultrasonic testing device has become inevitable trend in world.Using the advantages of EPLD(Erasable Programmable Logic Device) which has powerful logic function , easily operating I/O ports,high speed operation ability, and by means of MCU(Microcomputer Control Units) which has small volume, low price, high dependability, using agility, a portable digital ultrasonic testing device is developed. The functions of signal emmitting, incepting, magnifying, data collecting and processing, displaying graphics, determinant defects, as well data saving and outputting are realized. The saving problem of traditional ultrasonic testing is solved, and some infection factors of handlers are reduced. In virtue of technology of digital analysis and processing, the Signal-to-Noise is progressed, and testing reliability is improved. A very good foundation is established for the research of ultrasonic image testing.In developing ultrasonic testing device, the blocking designing method is used, system maintainability is progressed. Integrate circuits of lower noise, lower excursion, higher precision and higher dependability are chosen, reliability of hardware system is insured. The big screen of LCD(Liquid Crystal Display), a touch keyboard, and the Chinese operation interface based on the professional software and the tree processing of submenu from menu are used, interface of man-machine conversation is very friendly. The testing device has advantages of high testing precision, simple frame, operate easily, small volume, light weight, lower price etc.