Research on the stiffness detection of accessory surface with the way of ultrasonic

For resolving the defects of measurement of surface stiffness in material. It quests for the relation between the frequency traits of ultrasonic and stiffness of surface of parts. It adopts the technologies of sensors, computer science and Micro-Electronic science to resolve the problem of surface stiffness measurement of parts effectively in the condition of not too high precision. It can meet the requirements of fast, lossless, high reliability, operating convenience and flexibility. It gets the experimental data according the experiment, and sets a mathematic modal of "Rigidity--Frequency" in the area of low stiffness based on those data.