AN OPTICAL DISPLACEMENT METER BASED ON A LIGHT-TO- FREQUENCY CONVERTER |
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| O. Postolache, M.D. Pereira, P. Girão, M. Cretu |
- Abstract:
- This paper proposes a contactless displacement measurement system based on a temperature compensated light-to-frequency (L/F) converter. The optical displacement sensor is represented by the L/F converter excited by a LASER beam. To compensate the temperature drift error of the displacement sensor, an additional temperature measurement system based on a temperature transducer is required. The processing of the data delivered by the sensors is on-line performed using a neural algorithm implemented on a Digital Signal Processor. The Artificial Neural Network architecture used in the present application is Multiple Inputs – Single Output (MISO) type, and the output of the network represents the displacement value after an on-line temperature correction. In the calibration phase of the displacement measurement system a closed-loop motorised linear actuator controlled by a plug-in-PC motion board is added to the system.
- Keywords:
- displacement measurement, optical transducer, error compensation
- Download:
- IMEKO-WC-2000-TC2-P050.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000