4.1 - Intensity Referencing and Response Linearization in an Optical-Reflection-Based Distance Sensor System for White-Goods Applications
- Event
- AMA Conferences 2013
2013-05-14 - 2013-05-16
Nürnberg - Band
- Proceedings OPTO 2013
- Chapter
- O4 - Applications of Optical Measuring Technologies
- Author(s)
- J. Baumer, J. Schenkl - emz - Hanauer GmbH & Co KGaA, Nabburg (Germany), M. Shamonin - Regensburg University of Applied Sciences (Germany)
- Pages
- 69 - 73
- DOI
- 10.5162/opto2013/o4.1
- ISBN
- 978-3-9813484-3-9
- Price
- free
Abstract
A reflective optical sensor system for distance measurements in white–goods applications is presented. The technical solution implements a well-known intensity referencing principle - the optical bridge - in a low-cost design. The influence of the ambient temperature can be compensated for. The spurious effects such as slow output drift caused by aging of optical components or the variation of the system sensitivity due to the parameter spreading of system components can be successfully overcome as well. An algorithm for linearizing the system response is described and optimized for a low-cost microcontroller. It is also shown how to calibrate the sensor system in a specifically developed automated assembly line prototype.