Browse Prior Art Database

SELECTIVE PROFILE MEASURING TECHNIQUES

IP.com Disclosure Number: IPCOM000026754D
Original Publication Date: 1993-Jun-30
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 146K

Publishing Venue

Xerox Disclosure Journal

Abstract

Robotic systems using laser based sensors to measure height profiles on target objects house a laser light source and a detector array together in one unit. Such two dimensional laser based reflective range sensor systems project a stripe of laser light onto an object which is then reflected onto the detector array. Imaged laser light on the detector array renders a profile which depicts the relative height (or range) of the object for each lateral position (or resolution) along the laser stripe. Rendered profiles requiring operator inspection in order to identify points of interest on height profiles consume excessive amounts of operator time and are inconsistent and inaccurate.

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XEROX DISCLOSURE JOURNAL

SELECTIVE PROFILE MEASURING TECHNIQUES Mark T. Strang

Proposed Classification
U.S. C1.901/046
Int. C1. B25j 11/00

FIG. 2

f' f"

XEROX DISCLOSURE JOURNAL - Vol. 18, No. 3 May/June 1993 337

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SELECTIVE PROFILE MEASURING TECHNIQUES (Cont'd)

Robotic systems using laser based sensors to measure height profiles on target objects house a laser light source and a detector array together in one unit. Such two dimensional laser based reflective range sensor systems project a stripe of laser light onto an object which is then reflected onto the detector array. Imaged laser light on the detector array renders a profile which depicts the relative height (or range) of the object for each lateral position (or resolution) along the laser stripe. Rendered profiles requiring operator inspection in order to identify points of interest on height profiles consume excessive amounts of operator time and are inconsistent and inaccurate.

Disclosed is an automated, consistent and flexible method for analyzing height profiles and measuring points of interest within the profiles of objects rendered by laser sensors used with robotic systems. The method segments a height profile taken of an object by a laser sensor system into regions. The bounds of the regions of interest and any calculations to be performed within each region, as well as sensor head device parameters such as power level and exposure time are provided by the system operator for the object to be rendered. Once an object profile is rendered, calculations are performed for each region, such as, mi...