A method for detecting the size of plastic board

A plastic plate and size technology, which is applied in the direction of measuring devices, material capacitance, instruments, etc., can solve the problems of low quantitative accuracy, low detection rate of volume-type defects, and detection equipment or methods for plastic product specifications and sizes, and achieve detection sensitivity High, customer service damage, the effect of saving labor costs

Active Publication Date: 2011-11-30
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Claims
  • Application Information

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 or method that uses capacitive sensors to detect the specifications and sizes of plastic products.

Method used

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  • A method for detecting the size of plastic board
  • A method for detecting the size of plastic board
  • A method for detecting the size of plastic board

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Experimental program
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Effect test

Embodiment 1

[0035] see figure 1 and figure 2 , the method for detecting the size of a plastic plate according to the present invention is based on a motion unit 1 that can be positioned at any point in the set space, a capacitor for scanning detection and a capacitance measurement unit for receiving and converting signals, wherein the motion unit 1 The positioning point 3 is connected with the mobile pole plate 4 as a pole of the capacitor through the interface 10, the mobile pole plate 4 is made of metal material, preferably stainless steel, and the direction opposite to the mobile pole plate 4 is provided with a base 2 for placing plastic products as a capacitor The other pole, the base 2 is also made of metal material, the lower surface of the moving pole plate 4 is parallel to the upper surface of the base 2, and a detection vacancy is provided between the two pole plates. The mobile pole plate 4 and the base 2 are also respectively provided with wires connected to the capacitance m...

Embodiment 2

[0045] Based on the system structure and theoretical basis described in Embodiment 1, the following introduces the method for checking the appearance size of flat plastic products using the scanning detection system of the present invention:

[0046] (1) see Figure 4 , placing the regular plastic plate 6 in the detection space on the supporting surface of the base 2;

[0047] (2) Adjust the height of the moving unit 1 in the vertical direction so that the lower surface of the mobile pole plate 4 is close to the upper surface of the plastic plate 6, and the height is locked so that the mobile electrode 4 can only move on a certain horizontal plane. In this implementation In the example, the control system of the motion unit 1 instructs the stepper motor of the Z axis to adjust the stroke of the Z axis so that the distance between the lower surface of the moving pole plate 4 and the upper surface of the plastic plate 6 is between 1-10mm, and then further fine-tuned to 1-5mm A ...

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Abstract

The invention relates to a method for detecting the specification and the size of a plastic (high-polymer) plate by using a capacitor type sensor. Based on a motion unit which can drive a positioning point to an arbitrary position of set space and a base for placing plastic products, a moving polar plate is arranged on the positioning point of the motion unit; guide lines are extended from the moving polar plate and the base respectively and connected with a capacitor measurement unit; the scanning on the plastic plate by a capacitor is realized by a mode of driving the moving polar plate by the motion unit; and the detection on the specification and the size of a product and the detection on the position of a plastic package chip are realized according to records of corresponding relation between an input signal and motion coordinates; and the system can automatically complete the whole scanning process, so that missed detection and fault detection are avoided, and labor power cost is greatly saved.

Description

technical field [0001] The invention relates to an automatic detection technology, more specifically, to a method for detecting the size of a plastic plate by using a capacitor. 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 mainly two types of dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00G01N27/24
Inventor 高福荣周峰姚科
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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