In pharmaceutical consumables manufacturing enterprises, the pipe diameter of disposable blood collector is directly related to the capacity of blood collection, and the volume of blood collection is directly related to the results of medical examination, so the requirement of pipe diameter tolerance is very high. 

According to the special needs of enterprises in this industry, we have developed an automatic detection and control system for micro vascular drawing, which realizes the automatic detection, data display and recording curve display of pipe diameter in the production process of accurate capacity vascular drawing. It provides a digital and intuitive display for the production process, and abandons the backward production mode which used to rely on manual visual inspection and caliper inspection. 

Intelligent automatic control effectively improves the degree of automatic production in the production process, reduces the labor intensity of workers, and reduces the waste of energy and raw materials. 

In addition, in view of the drawn micro-vascular collection, our institute has newly developed an automatic grading system for the inner diameter of micro-vascular collection, which can be used for high-precision detection and multi-grade sorting of the inner diameter of glass tube for micro-vascular collection. 

The system integrates laser, precision machinery and computer technology, and is composed of industrial control mainframe, CCD camera, feeding mechanism, conveying guide rail, sorting mechanism, receiving hopper, support frame and so on. 

Through the feeding mechanism and the conveying guideway, the glass tube automatically passes through the detection position in turn, through real-time camera shooting and computer real-time sampling and processing, the inner diameter value of micro collection blood vessel is obtained, and the glass tube is sorted into different receiving hoppers according to the input inner diameter and grade difference.