I believe everyone is familiar with the following button. Most electronic products are equipped with this button, which we usually refer to as the 'power button'; The power button is widely used in electronic devices and is one of the important interfaces for user device interaction.

Q: How to achieve such precise positioning of each power button?

A: To ensure the consistency of the power button, the manufacturer has set up multiple quality inspection stages during the production process, comprehensively testing the size, appearance, function, etc. of the button to ensure that every product meets the standards.

Center positioning detection

Application scenario

Testing requirement: Check whether the button is in the center position within the circle

Detection target: Use front facing lighting to detect whether the button is in the center position within the circle. When non-conforming products are detected, output an NG signal to the PLC for discharging;

Camera installation method: The upper camera is fixedly installed, and static photos are taken from top to bottom, taking one product at a time;

Number of cameras: 1 upper camera, total 1pcs;

Lighting method: front light source+back light source, incoming material method to be determined;

Product size: outer diameter 11mm, height 5.7mm;

Performance/Indicator Requirements

Visual inspection accuracy: 0.02mm; Leakage rate=0%;

Camera photography detection time: within 35mm;

Selection and Configuration List

imaging effect

After setting up a visual mechanism to test sample images, the above hardware configuration can achieve good imaging results. Then, by analyzing the detection algorithm on the imaging images, satisfactory detection results can be obtained.

Calculate whether the center of the circle is perpendicular to the concentricity of the button to determine if the button is in the center position.

The above is a case study of Akusense application in center positioning detection. If you have any visual solution requirements, please feel free to contact us.

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