Reflective amplified type coin detection device

Abstract

The invention provides a reflective amplified type coin detection device, comprising an annular refracting prism, an annular convex lens and a camera. The upper circumference of the annular refracting prism is larger than the lower circumference of the annular refracting prism; prismatic surfaces are the corresponding slopes to form an inclined annular shape with big top part and small bottom part; the annular convex lens is arranged along the upper circumference of the annular refracting prism; lens surfaces of the annular convex lens face to the prismatic surfaces of the annular refracting prism; the coin is arranged at the center below the annular refracting prism; a side image of the coin is refracted to the annular convex lens via the prismatic surface of the annular refracting prismand zoomed; the camera is vertically arranged above the center of the annular convex lens and is positioned above the coin to shoot the image zoomed by the annular convex lens; and the annular refracting prism and the annular convex lens are compounded into a composite annular prism. The coin detection device has simple structure; an image collecting system consisting of the prism, the convex lens and the camera has high image forming precision and good definition; and the rolled words on the edge of the coin can be detected by shooting the image by the camera; and the detection is convenientand quick.

Description

technical field [0001] The invention belongs to the field of optical machinery and only artificial vision detection, is used for automatic detection of rolling characters on coin edges, and is a reflection and amplification coin detection device. Background technique [0002] In coin detection, there is currently no effective technology in China to detect the quality of rolling characters on the side edge of the coin with a single camera perpendicular to the surface of the coin. There is a metal ring mirror detection method in Europe, but due to the small font size of the edge rolling characters, it is difficult to capture images in the detection The proportion is too small, and the use of imaging lens to enlarge the post-processing burden is too heavy, and high-speed detection cannot be realized. Contents of the invention [0003] The problem to be solved by the present invention is: a detection device for rolling characters on the edge of a coin is needed to realize fast...

AI Technical Summary

Problems solved by technology

[0002] In coin detection, there is currently no effective technology in China to detect the quality of rolling characters on the side edge of the coin with a single camera perpendicular to the surface of the coin. There is a metal ring mirror detection method in Europe, but due to the small font size of the edge rolling characters, it is difficult to capture images in the detection The proportion is too small, and the use of imaging lens to enlarge the post-processing burden is too heavy, and high-speed detection cannot be realized

Images