Implementation of a Long Range LRF by Automatic Multi-Mode Measurement Scheme

A long range Laser Range Finder (LRF) is proposed and developed in this paper. A mathematical model, which relates the relation between object distance and Position Sensitive Detector (PSD) voltage output, is investigated. LRF is a single point optical triangulation instrument, which detects distance information quickly and easily without touching the object being measured. It can be used in real-time control application. This kind of instrument is available in today's market, however it is limited to a short range application only (maximum range of about 400 mm). The non-linearity is inherent in this kind of instrument, resulting the sensitivity and accuracy change with the distance nonlinearly. Sensitivity and accuracy becomes worse abruptly when distance to the object being measured is longer than a limited range. The proposed long range LRF is developed to achieve a longer operation range of about 1 m or more. To improve the instrument accuracy at long range, automatic multi-...

• Type: Journal
• Year: 2000
• Where: JCSC
• Authors: Manukid Parnichkun, Viraphan Samadi
• Keywords: Automatic Multi-mode Measurement, JCSC 2000, Long Range, Multi-mode Measurement Scheme