ZHAO Ling1，2, YAO Jing1，2*

(1.Hebei Provincial Key Laboratory of Heavy Fluid Power Transmission and Control, Yanshan University,

Qinhuangdao 066004, China; 2.Key Laboratory of Advanced Forging & Stamping Technology and Science,

Ministry of Education of China, Yanshan University, Qinhuangdao 066004, China)

Abstract: Aiming at the problem of the variety of shape dimension for workpiece and difficulty of intactness recognition for packages, a multi-parameter detection system of workpiece transport was designed based on the development platform of LabVIEW and NI Vision. The system was combined with a CCD camera, photoelectric sensors, ultrasonic sensors for height detection, and weight sensors for weight detection, which was used to control the movement direction and velocity of the conveyer belt, according to the user′s requirement. The workpiece parameters were detected effectively, such as transport speed, transport quantity, size of workpiece and intactness of packages, by the image processing method of morphological filtering and edge detection in the system. The parameter information was displayed by the human-computer interface which was stored to be used by the user. The results indicate that the average measurement error of each parameter is less than 5% of the measurement range, and the smallest damaged area is 1cm2, which meets the requirements of practical application. Besides, the detection system has made a good improvement of detection efficiency in practical production.

Key words: image processing; workpiece transport; LabVIEW; multi-parameter detection