5. Optical digital sensors
Displacement can be measured either absolutely or incrementally. Absolute encoding provides information on both relative displacement and position, while incremental encoding provides information on relative displacement only. In this case, position information requires the encoder to be initialized with respect to a reference position.
5.1 Absolute optical encoders
The absolute encoder provides absolute position information, with displacement measured as a position variation. The direction of displacement is directly determined by the sign of the position variation.
The Ultimate Scientific and Technical Reference
This article is included in
Mechanical and dimensional measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Optical digital sensors
Sources of uncertainty related to sensor positioning
Bibliography
References
In the Measurement and Control
Standardization
French Standards Association AFNOR
- Proximity switches – Requirements for proximity switches with analog output. - NF EN 50319 - Déc. 1999
- Low-voltage switchgear – Part 5-2: Control circuit devices and switching elements – Proximity switches Constituted by : NF EN 60947-5-2:199903 (C63-147), NF EN 60947-5-2/A1:199912 (C63-147/A1). - NF EN 60947-5-2 - Déc. 1999
- Low-voltage switchgear – Part 5-3: Control...
Main manufacturers
Farrand Controls : http://www.ruhle.com/index.htm
Heidenhain : https://www.heidenhain.fr/
Midori America Corp: http://www.midoriamerica.com/index.html
...
The Ultimate Scientific and Technical Reference
