Appearance inspection of automotive battery top cover peripheral welding is an important means to ensure welding quality and safety. By inspecting the appearance, welding defects can be detected in time to prevent these problems from affecting the sealing and safety of the battery.

Detection needs:

Inspect the appearance of the perimeter weld to identify the presence of defects such as pops and pits.

Detection Methods:

◆ Gray-scale highlighting of height mutation information in height images using a POMEAS line laser displacement sensor to bring out raised or pitted areas；

◆ Defect marking of the grayscale emphasis map, analysis of the relevant area, height and other characteristics of the marking information, screening out defective areas that meet the judgment specifications。

Detection method:

◆ Extraction of the cross-section profile at the weld track；

◆ Search for the highest point at the weld trajectory；

◆ Fit a straight line to the platform position datum on the inside of the contour；

◆ Calculate the distance from the highest point to this reference line as the weld flanging amount；

Detection accuracy：

◆ Repeatability: 0.01mm (laboratory test, linear motor + marble platform, the actual accuracy of the field test shall prevail)。