Surface Contour Measurement Using a Short Range Laser Displacement Sensor

Center for Automotive Materials and Manufacturing National Research Council Canada 800 Collip Circle, London, Ontario, Canada, N6G 4X8 Contact: [email protected] Reviewed, accepted September 18, 2009 Abstract Non-contact freeform surface measurement is widely used in industry. To acquire the surface data, a laser displacement sensor and a motion system are typically used. One of the factors that affect the measuring accuracy is the sensor’s resolution. A high resolution sensor usually has a short measuring range. However, an unknown component’s profile with a large peak-to-valley height variation can not usually be measured using a short range sensor.