Detection device and detection method for inner part of small-opening and large-inner-cavity product

Abstract

The invention relates to the technical field of food detection and particularly relates to a detection device and a detection method for an inner part of a small-opening and large-inner-cavity product. The detection method comprises the following steps: fixing a product to be detected on a detection tabletop; positioning a photographing device on a fixed detection position by a positioning device to detect an inner image of the product to be detected; then comparing the inner image with an inner image of a standard product; and if the similarity between the inner image of the product to be detected and the inner image of the standard product is high, showing that an inner machining effect of the product to be detected is basically the same as that of the standard product so as to ensure that the product is qualified. According to the detection device, the inner machining effect of the small-opening and large-inner-cavity product can be conveniently detected; the detection efficiency is high and the detection is comprehensive; the wrong judgment cannot happen easily and the detection accuracy is high.

Description

technical field [0001] The present application relates to the technical field of product detection, in particular to a product internal detection device and detection method with a small opening and a large internal cavity. Background technique [0002] In the process of product processing and production, many products with large inner cavity but small opening are often encountered, such as fuel tanks. Taking the production process of fuel tanks as an example, to produce a fuel tank, the main body of the fuel tank must be manufactured through injection molding, welding and other processes: a tank body with multiple small openings, and then multiple valves need to be welded on this main body. To seal the aforementioned small openings one by one until only one opening remains. [0003] In the process of welding the valve, it is not only necessary to weld from the outside of the fuel tank, it is often necessary to extend the welding plate into the inside of the fuel tank throu...

AI Technical Summary

Problems solved by technology

Obviously, due to many restrictions on sight and movement, welding the inside of the fuel tank is much more difficult than welding the outside, and the stability of the welding effect is also worse, and processing problems such as misalignment are extremely prone to occur. Testing is an extremely important means to ensure product quality

[0004] However, as mentioned above, since there is only one opening left after welding, this brings a lot of difficulty to the inspection. Normally, for the welding situation outside the fuel tank, it is possible to judge whether the welding effect is qualified by human eyes, but for the inside For the welding situation, due to the lack of internal light and the obstruction of human eyesight, it is extremely difficult to judge by human eyes, which is inefficient and prone to misjudgment

In this regard, the current practice in the industry tends to conduct more precise external monitoring to improve monitoring accuracy, but after all, some internal defects will not be manifested externally, and this approach has certain limitations

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