System and method for efficient surface measurement using a laser displacement sensor
US9605950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Oct 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides a system for measuring displacement of an object surface having a displacement sensor that projects a line on the object surface and receives light from the projected line at an imager in a manner defines a plurality of displacement values in a height direction. A vision system processor operates on rows of imager pixels to determine a laser line center in columns of imager pixels in each of a plurality of regions of interest. Each region of interest defines a plurality of rows that correspond with expected locations of the projected line on the object surface. A GUI can be used to establish the regions. In further embodiments, the system generates grayscale images with the imager. These grayscale images can be compared to a generated height image to compensate for contrast-induced false height readings. Imager pixels can be compared to a reference voltage to locate the line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.