Method and device for fast measurement of keyboard keycap flatness based on structured light imaging

Abstract

The invention relates to a method and device for rapidly measuring the flatness of keyboard key caps based on structured light imaging. The method comprises the steps that S1, a structured light modeis designed, projection is carried out, and generated structured light forms two clear light stripes at the upper and lower ends of each keyboard key cap of a to-be-detected keyboard respectively; S2,multiple cameras acquire image sequences, wherein after a detection signal is received, the cameras collect the keyboard image sequences which are encoded by the structured light; S3, an image is spliced, wherein the image sequences are spliced to form the complete full-scale keyboard image; S4, the key caps are subjected to modeling, wherein key cap masks and position information of each key capin the keyboard image are obtained manually; S5, the flatness of each keyboard key cap can be rapidly detected by utilizing a flatness algorithm detection algorithm. The device is used for implementing the method. The device has the advantages of being high in automation degree, high in detection efficiency, easy to implement, easy to maintain and the like.

Description

technical field [0001] The invention mainly relates to the technical field of machine vision, in particular to a method and device for quickly measuring the flatness of a computer keyboard keycap. Background technique [0002] The keyboard is an electronic product commonly used in daily life, and it is also a bridge for human-computer interaction. A general keyboard is inlaid with hundreds of keys, and the key cap of each key is the main contact part of the user. Once the key cap is uneven, it will affect the comfort and smoothness of the user's keystrokes. Therefore, in the production process of the keyboard, it is necessary to detect the flatness of the keyboard keycap. [0003] If manual detection is used, it has strong subjectivity, large errors and low efficiency. [0004] At present, there are four technical solutions to realize automatic measurement of keycap flatness: (1) measuring probe measurement method, which has high precision and does not need to move the sen...

AI Technical Summary

Problems solved by technology

[0003] If manual detection is used, its subjectivity is strong, the error is large, and the efficiency is low

[0004] At present, there are four technical solutions to realize automatic measurement of keycap flatness: (1) measuring probe measurement method, which has high precision and does not need to move the sensor, but the disadvantage is high equipment cost and maintenance cost; (2) three-dimensional visual measurement method, Its detection accuracy is high, but the biggest disadvantage is that it needs to move the three-dimensional sensor, and the detection speed is slow; (3) the laser rangefinder measurement method, this method also needs to move the sensor, physical installation is a problem, its detection speed is slow, and there is a displacement error; ( 4) The machine vision measurement method of the area array camera has the advantage of low cost, but low detection accuracy

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