Cross-Section Profile Measurement of Irregular Automotive Sealing Strips

I. Project Background

In automotive manufacturing, the quality of sealing strips is a primary factor in vehicle insulation and noise reduction. Traditional 2D vision systems often struggle with irregular automotive sealing strips because these components typically have complex geometries and light-absorbing black surfaces. These factors lead to poor contrast and inconsistent data capture when using standard lighting.

SinceVision 3D laser profiler operates independently of ambient light conditions. Whether the material is flexible or rigid, or has specific surface textures, the SRI7140 captures high-resolution spatial data. This allows for comprehensive scanning and intelligent stitching of sealing strip profiles to meet rigorous automotive quality standards.

II. Multi-Camera Scanning and Profile Stitching Solution

SinceVision SRI7140 3D laser profiler provides the high-precision data acquisition required for modern production lines. It accurately measures critical dimensions such as width and thickness with a repeatability of 0.5 μm. This precision prevents assembly issues such as noise leaks or poor door seals caused by dimensional deviations.

1. System Configuration

The measurement setup uses four SinceVision SRI7140 units installed on a circular guide rail at 90-degree intervals. The sealing strip passes through the center of the rail while the cameras remain stationary. An external trigger synchronizes all four sensors to scan the cross-section at a high frequency. This configuration captures a full profile including width, thickness, gaps, and radii.

2. Data Fusion and Stitching

Using coordinate transformation and optimized grayscale algorithms, the system stitches local point clouds from all four devices into a single, unified 3D model. SinceVision’s proprietary fusion algorithm merges overlapping regions in only 6 ms. This high-speed processing eliminates measurement errors at the stitching points and ensures a continuous 3D point cloud model of the sealing strip.

3. Real-Time Quality Control

The system monitors surface integrity and dimensions in real time. If the 3D laser profiler detects surface defects, such as bulges or depressions, the software triggers an immediate alert. This allows operators to remove defective parts and adjust machine parameters instantly, which improves overall production efficiency.

4. Automated Reporting

All measurement data is logged automatically. The software generates detailed reports that help quality control teams identify long-term process trends and optimize manufacturing parameters based on factual data.

Image:Product Assembly Mockup

III. SinceVision Sensor Recommendation: SRI7140

SinceVision SRI7140 3D laser profiler is the recommended choice for cross-section profile measurement of irregular automotive sealing strips. It overcomes the fundamental weaknesses of 2D vision by providing a stable, high-precision, and non-contact solution. This technology supports the transition toward intelligent, data-driven automotive manufacturing by ensuring every component meets exact design specifications.