Contactless Position Measurement System


[05-AUG-22] Our Contactless Positioner Measurement System (CPMS) uses an infrared background to capture stereoscopic silhouette images of highly-reflecting metallic objects, which we then analyze to determine the location and orientation of these objects. The reflections of ambient light that make it so difficult to locate these objects are subdued by the use of an infrared background in a room in which the only ambient light comes from fluorescent or solid-state lamps. Development of the CPMS is funded by the United States Department of Energy (DoE) under Grant 13557088.


Figure: Global Coordinate System Established by Reference Plates and BCAMs. Silhouette cameras complete the measurement of flange position in global coordinates.

The CPMS sets up a global coordinate system using reference plates and metrology cameras, then obtains the position of the highly-reflective components with respect to this global coordinate system. The metrology cameras are BCAMs. The reference plates operate in the same way as the alignment bars in the ATLAS End-Cap Alignment System, see here, only they are calibrated plates rather than calibrated bars.

Development Log: Development of the CPMS at OSI starting August 2022.

Infrared Backlight (A3046): A diffuse source of infrared light that may be flashed for bright, sharp, silhouette images.

Contactless Position Measurement for Highly Reflective Component: Project abstract and summary from our Small Business Innovation Research (SBIR) application to the Department of Energy (DoE). Submitted 26-FEB-22, awarded 27-JUN-22, grant number 13557088.

Brandeis CCD Angle Monitor (BCAM): Home page of the metrology cameras we use to construct the CPMS global coordinate system.