The Weld Penetration Depth Detection Module applies Optical Coherence Tomography (OCT), an optical low-coherence inspection technique. It directly measures the depth value at the bottom of the molten-pool keyhole, making penetration-depth fluctuation visually evident, and projects a light beam onto the workpiece to detect back-scattered light at different depth layers, generating real-time 2D or 3D structural images for in-process diagnostic monitoring.

The module performs in-situ process monitoring with micro-level imaging resolution and no radiation risk. It extracts weld cavity morphology and performs real-time penetration depth detection. Software parameters are optimised with only a few trial workpieces, and the acceptance (pass/fail) range is generated directly from the product’s design requirements. Detection precision is high enough to eliminate missed detection while keeping the overkill rate within 1%. When the part or welding requirement changes, only a simple software-parameter adjustment is needed. Beyond a pass/fail verdict, the module provides specific penetration values, and all results can be re-verified afterwards to drive continuous quality improvement. It also supports rapid large-area scanning and provides instant data acquisition and feedback for production traceability.

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Application areas / 应用领域:

Of direct relevance to data centre infrastructure manufacturing, the same OCT capability inspects weld seams, cavity morphology and penetration depth of liquid cooling manifolds, AI compute cabinet components and other precision welded parts. Application areas also include:
- Data centre infrastructure component QC — manifold and AI compute cabinet part seam, cavity and penetration-depth inspection / 数据中心基础设施部件质控（歧管及算力机柜部件焊缝、型腔、熔深检测）
- Weld in-process inspection / 焊中检测
- Hairpin motor depth inspection — standard, high-abnormal and wear-abnormal detection / 发夹电机精深检测（常规、高度异常、磨损异常）
- Blue-film cell surface inspection — bubble, breakage, scratch and contamination defects / 蓝膜电芯外观检测（气泡、破损、划痕、脏污）
- Battery tab / pole piece defect inspection — scratches, delamination, interference and perforations / 电池极片瑕疵检测（划痕、脱膜、干涉、穿孔）
- PCB inspection / 电路板检测
- Other depth-structure imaging — manual exclusion, transparent adhesive, smartphone camera and multi-layer membrane defect imaging / 其他深度成像（人工排除、透明胶、手机摄像头、多层膜板）