In-Line Surface Flatness Detection Based on Laser Ranging Sensor

To address the issue of detecting the surface flatness of industrially produced plate parts at the time of leaving the factory, a novel detection method is proposed. One of the most critical quality indicators for plate parts is surface flatness. Traditional methods of detection generally have low accuracy and efficiency. The main principle of inspection is as follows: the conveyor belt transports the parts to be inspected to the inspection area, and a laser ranging device with a motor above the inspection area is set up. The device performs a point laser scan over a part's surface, acquiring numerical information that is analyzed by an externally connected computer through the use of programming algorithms that inspect the flatness of the surface. A new algorithm is developed to draw the corresponding data curve from the data collected by the laser ranging sensor and reconstruct the rough contour of the inspected part through computer algorithms. The study proves this detection method obviously improves the accuracy and confirms the feasibility of the approach. Data curves and reconstructed contours prove to be effective in evaluating the surface flatness of plate parts. This new method not only proves helpful in improving the accuracy of detection but also quite feasible and practical for industrial production. Inclusion of some efficient method for surface flatness detection can greatly improve the quality control level of plate parts and meet the demands of industrial production.