The surface defect of 5A02 aluminum plate is the defect that does not meet the requirements on the surface of the aluminum plate produced in the production of cold-rolled aluminum plate. These defects are generated during the production or processing of the aluminum plate. The appearance defects that affect the processing of aluminum products are detected, and the size of the defects, the location of the positioning defects, etc. are extracted in time, and some characteristics of the defects are extracted, and then saved in the database to facilitate the staff to view and adjust the equipment at any time to improve the cold-rolled aluminum plate. Surface Quality.

1. In the detected object, use artificial methods to excite an elastic wave, and the frequencies of the emitted elastic waves are different, and then use these elastic waves of different frequencies to propagate on the back of the detected object, and use some receiving instruments to receive these different frequencies. the elastic wave, and then analyze and study the received signal;

2. Through research, we can understand the mechanical properties of the detected object and the distribution of defects. The commonly used detection ultrasonic wave is a pulse wave, which has the characteristics of high frequency, sensitivity to defects, high resolution, and short wavelength;

3. When the 5A02 aluminum plate production environment is determined, the acoustic parameters such as the propagation speed of the ultrasonic wave in this environment, the main frequency of the received signal, and the amplitude of the first wave are unchanged. However, when there are defects such as bubbles, holes, and metal indentation on the surface of the 5A02 aluminum plate, some parameters of the ultrasonic wave will change. According to these changes, we can determine the parameters such as the type and location of the defect.