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Application of laser tracker in automobile body detection and analysis
**1. 6D Measurement Technology with Laser Tracker**
With the growing demand for precision measurement and quality control in industrial environments, various on-site measurement tools have emerged, such as laser trackers, articulated arm measuring systems, and large-scale scanners. Compared to traditional three-coordinate measuring machines, these tools offer lower precision but provide greater portability and flexibility. They can be easily moved close to the workpiece within a workshop without requiring special environmental conditions like controlled temperature, humidity, or air supply. This makes them ideal for use in real-world production settings, ensuring reliable measurement accuracy. Their portability has led to widespread adoption, especially in automotive manufacturing, where laser trackers are preferred for their ability to measure large structures with high accuracy and convenience. As a result, more of these devices are now being deployed directly at workshop measurement sites.
Traditional laser tracker systems typically rely on 3D measurement using a reflective target (mirror). The system measures spherical coordinates (X, Y, Z), which are often converted into Cartesian coordinates. These systems are widely used in aerospace and automotive industries for component alignment, tooling setup, and profile measurements. However, as industrial applications become more complex, users are looking beyond simple mirror-based tracking. Modern workpieces often have intricate shapes and distributed features, making it challenging for conventional laser trackers to meet both accuracy and efficiency demands.
To address this, Leica’s 6D measurement solution—T-Series—has been developed. The T-Series introduces a T-Cam camera that enhances the laser tracker by capturing not only the X, Y, Z position of the target but also its orientation through I, J, K values, representing rotation in three directions. This provides richer data for more accurate and comprehensive measurements.
**1.1 Walking Coordinate Measuring System – T-Probe**
The T-Probe is an innovative attachment that turns the laser tracker into a portable, wireless 3D coordinate measuring system. By adding a ruby-tipped probe, it allows contact-based measurement of body parts, with a measuring range of up to 50 meters. This enables precise inspection during the production process, including sub-assembly verification and part matching.
The T-Probe operates wirelessly, eliminating the need for cables, and is powered by a built-in lithium battery. Users can initiate measurements, delete points, or perform continuous scanning simply by pressing a button on the device. This transforms the laser tracker into a mobile, flexible measuring system suitable for on-site applications.
**1.2 Non-Contact Measurement – T-Scan Probe**
In addition to the T-Probe, the T-Series includes the T-Scan system, designed for large-area surface scanning. The T-Scan probe captures point clouds, triangle meshes, and surface renderings, allowing detailed analysis of workpiece geometry. It is ideal for surface comparison, size control, reverse engineering, and other applications.
Compared to traditional single-point probing, the T-Scan significantly improves efficiency, capable of measuring up to 20,000 points per second. This makes it highly effective for contour scanning, gap and flush analysis, and waistline measurement. Its advanced scanning capabilities make it a powerful tool for modern industrial metrology.