I. Project Background

In modern manufacturing, the dispensing process is a core step for sealing, fixation, and insulation, whose precision directly determines the final reliability and safety of products. As product structures in automotive electronics, wearable devices, and other fields become increasingly sophisticated and complex, high-precision inspection of 3D irregular glue paths has become a key bottleneck restricting quality upgrading.

Figure | Typical Application Products of Irregular Glue Paths

Traditional inspection solutions based on 3D line-scan cameras face three core challenges in such scenarios:

• Imaging Shadows and Data Loss：Constrained by the principle of triangulation, when the laser beam is not perpendicular to the glue path, shadows easily occur in imaging, resulting in data loss. It is difficult to fully capture the 3D details of irregular or curved glue paths in a single pass.

Figure | Missing 3D Point Cloud Imaging

• Long Engineering Adaptation CyclesInspection engineering is strongly bound to product models. Changing to new products requires re-adjusting complex stitching algorithms and logic flows, leading to long engineering setup cycles. When exceptions occur on the production line, frontline operators cannot intervene quickly, seriously slowing down production tact.

• Difficult Defect JudgmentTraditional solutions require multiple zone scans and cannot restore the complete glue path shape. Defects must be displayed in zones across multiple 3D images, and staff need repeated comparisons to locate defects, making it hard to grasp the overall glue path intuitively and resulting in low efficiency in problem analysis and traceability.

Figure | Schematic Diagram of Traditional Measurement Results

II. Shenshi Intelligent 3D Vision Curve Glue Inspection Solution

To address the above pain points, Shenshi Intelligent has launched an innovative 3D Bezier Curve Inspection Solution, bringing breakthroughs to the industry through deep integration of technology and application.

Advantage 1: Shadow-Free Imaging and Complete Data Acquisition

Using the Bezier curve tool, operators can easily draw 3D scanning paths fitting any irregular glue path by dragging control points on the software interface without programming.

Figure | Schematic Diagram of Bezier Curve Operation

The motion platform, equipped with Shenshi Intelligent SRI7050 3D Laser Profilometer, performs high-precision linked scanning along the curve on XYZR axes. The system dynamically adjusts its attitude in real time to ensure the laser line remains perpendicular to the glue path surface throughout the process, physically eliminating shadows and data loss.

Figure | Complete Point Cloud of Irregular Glue Path Obtained by Scanning

The Shenshi Intelligent SRI7050 3D Laser Profilometer delivers high-precision data acquisition, accurately measuring key dimensions such as adhesive bead width and thickness, with repeatability up to 0.2 μm. Combined with optimized scanning paths, the system captures complete 3D glue path data in one pass, avoiding efficiency loss and error accumulation caused by multiple scans.

To solve engineering adaptation challenges, the system innovatively adopts a scenario-based recipe management mode. Based on the dispensing surface features of different products, the system pre-creates reusable standardized inspection recipes.

Figure | Creating Templates on the Software Interface

When the production line needs model change or new product introduction, frontline operators only need to select the new product’s inspection area and fine-tune key parameters. The system automatically completes deployment and adaptation of inspection engineering. This not only helps enterprises respond quickly to production changes and shorten time-to-market, but also reduces long-term reliance on scarce professional talents, empowering the production team with independent response capabilities for inspection.

Figure | Display of Main Software Interface

To resolve inefficient judgment in traditional solutions, this scheme realizes a closed loop from fragmented information to overall insight through intelligent panoramic stitching and an integrated analysis interface.

On the main interface, the system accurately associates and synchronously displays defect locations, precise quantitative data (such as glue height and width), and 2D/3D profile images. Using color-mapped heatmaps, the distribution and severity of various defects — including broken glue, overflow, and narrow glue — are clearly visible. On-site personnel can quickly complete defect positioning, qualitative analysis, and severity assessment without repeated comparison across multiple images.

This design not only improves the efficiency of single inspection and analysis, but also generates structured and complete quality archives, providing intuitive and accurate data support for production problem traceability and process parameter optimization. It drives quality control from "post-inspection" to "in-process insight" and "preventive optimization".

III. Value Empowerment by Shenshi Intelligent Sensors

In the era of precision manufacturing pursuing full-process quality controllability, Shenshi Intelligent’s 3D Bezier Curve Inspection Solution achieves a fundamental paradigm shift — upgrading from "passive inspection" relying on hardware stacking and post remediation to "active planning" that defines paths through software and avoids problems at the source.

This is not only a technological innovation, replacing "hardware redundancy" with "software intelligence" to fundamentally eliminate shadows, blind spots, and data loss. It is also an evolution of production philosophy, transforming complex glue path inspection from an expert skill into a standardized process that frontline employees can master quickly.

When irregular glue paths no longer become a quality bottleneck, your production line will unleash unprecedented efficiency and flexibility. Shenshi Intelligent is ready with a complete solution. We sincerely invite you, who are struggling with irregular part inspection, to contact our technical experts immediately for a customized evaluation plan, and jointly open a new chapter in quality control for precision manufacturing.