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laser triangulation

laser triangulation - this object is emitted back and...

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ME 120 Prof. Mysore Feb. 17, 2009 Laser triangulation sensors are used to measure distance, surface profiles, dimension and various other parameters such as vibrations for different applications. Some of the applications include: lumber measurements to measure lumber dimensions and cut lumber, steel measurement are used in steel casting where the measurement of hot steel is required, road profiling, rubber thickness and many others such as package dimensioning. Laser triangulation sensors work on the principle, illustrated on Figure 1, of optical triangulation. The diagram on Figure 1 depicts a laser being emitted from position 1 and being focused by a lens on position 2 onto an object on position 6. Radiation from
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Unformatted text preview: this object is emitted back and collected by another lens on position 3 and then collected by CCD (charge couple device) on position 4. Using CMOS technology a microprocessor on position 5 calculates the distance from the incoming light on position 4. Figure 2 is an example of laser triangulation devise to measure the distance of the material in between the two lasers. The separation between the two laser is known and the readings obtain from the two sensors are subtracted from the separation creating a thickness gaging measurement. Figure 1: Laser triangulation diagram Figure 2: Laser triangulation equipment to measure distance....
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