Method for detecting internal consistency of plastic product

Abstract

The invention relates to a method for detecting the internal consistency of a plastic (macromolecular) product by using a capacitance type sensor. The method is based on a motion unit and a base; the motion unit can be located at any point in a given space, and the base can be used for placing the plastic product. A moveable polar plate is configured at a locating point of the motion unit, the leads led out from the movable polar plate and the base respectively are connected with a capacitor measuring unit, and the movable polar plate is driven by the motion unit, so that the capacitor can scan the plastic plate. By means of comparing the correspondence curves of the output signals and the motion coordinates on different scanning routes, detection on the internal consistency of a plastic product and the consistency of different plastic products is realized, and the detection results have good continuity. Meanwhile, because the motion unit can scan automatically, the costs of human resources can be largely reduced.

Description

technical field [0001] The invention relates to automatic detection technology, more specifically, to a method for detecting the internal consistency of plastic products by using a capacitive sensor. Background technique [0002] Plastic (polymer) products have been widely used in industry due to their low price as soon as they appeared. With the progress of manufacturing technology and the continuous enhancement of performance, plastic products have even replaced traditional metal materials in many fields. The manufacturing quantity is huge. For manufacturers of plastic products, how to quickly and effectively inspect plastic products is a very common problem. Generally, the inspection of plastic products mainly includes whether the appearance specifications are qualified and whether there are defects inside the product. , where the former affects the aesthetics of the product, and the latter mainly affects the mechanical properties of the product. At present, there are ma...

AI Technical Summary

Problems solved by technology

Of course, there are also systems in the industry that use non-contact methods such as visual analysis and ultrasonic flaw detection. However, the visual system cannot detect internal defects in plastic products. Ultrasonic has a higher detection rate for area defects, but for volume defects The detection rate is low, and it is only suitable for detecting workpieces with large thickness. It has certain requirements for the material and grain size of the detection object, and the quantitative accuracy is not high. There is no direct witness record for the detection results.

[0005] At present, there is no equipment and method for detecting the internal consistency of plastic products using capacitive sensors.

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