Face-to-face photographing type coin inspection machine and coin inspection method

Abstract

The invention provides a face-to-face photographing type coin inspection machine and a coin inspection method. The face-to-face photographing type coin inspection machine is used for inspecting the quality and a coincided imprint of a coin stamping image and comprises a conveyor belt, a slope slide way and a face-to-face photographing structure, wherein the slope slide way is connected to the outlet end of the conveyor belt; a coin is transmitted from the conveyor belt and then enters the slope slide way to take inertia and free-fall motion; the slope slide way is provided with a transparent structure which enables the front and back images of the coin to be both showed; and the face-to-face photographing structure is the front and back image structure of the coin capable of moving to the slope slide way in a simultaneous face-to-face photographing way. The invention simultaneously inspects the quality of the front and the back of the coin on the slope slide way without setting a complex mechanical structure for overturning the coin in the coin inspection machine, thereby reducing the volume, lowering the requirements for the space of a workshop and achieving the purpose of simplifying and reducing the coin inspection machine.

Description

technical field [0001] The invention relates to a coin inspection technology, in particular to a counter-beat coin inspection machine and a counter-pat coin inspection method for quality inspection of coins. Background technique [0002] At present, the machines for checking coin quality include: the online coin checking machine of Nanjing Mint of my country, the offline coin checking machine of Shenyang Mint of my country, the VisiCoin100 type coin checking machine of French Proditec company and a kind of coin checking machine of Japan. These coin checking machines have the following main problems: [0003] 1) It is large in size and requires high space in the workshop. [0004] The body of the coin checking machine is relatively long, and the horizontal direction is more than 2 meters. The reason why the volume of the mechanical part is huge is that when detecting coins, there are two detection points, and the camera can only shoot above the conveyor belt. The mechanica...

AI Technical Summary

Problems solved by technology

The mechanical part needs to have the function of flipping coins, and the structure is relatively complicated, which makes the space size of the whole machine huge

[0005] 2) The specification detection accuracy is low

Because the contrast between the coin and the background is very low, the image of the outer ring is not clear enough to detect the size of the outer ring

If the diameter of the outer ring is out of tolerance due to mold wear, if the mold cannot be found and replaced in time, it may cause a whole batch of waste products

[0007] 3) can not detect the printing

All kinds of existing coin inspection machines take pictures of the front and back sides of the coin at different detection points, and the coin may rotate when passing through different detection points, so the existing detection methods cannot detect this deviation

If the printing deviation cannot be found in time, it may cause the whole batch of waste products

[0009] 4) There is no online and offline integrated coin production quality inspection and sorting machines for different types of coins

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