公开(公告)号：US09803975B2

公开(公告)日：2017-10-31

申请号：US15069308

申请日：2016-03-14

Applicant: COGNEX CORPORATION

Inventor： Michael C. Moed ,  Carl W. Gerst, III

IPC: G06K7/10 ,  G01B11/06 ,  G01B11/25 ,  G06K9/22 ,  G06K9/20 ,  G06K9/32 ,  G06T7/62 ,  G06K7/14

CPC classification number: G01B11/06 ,  G01B11/25 ,  G06K7/10544 ,  G06K7/1417 ,  G06K9/2027 ,  G06K9/22 ,  G06K9/3208 ,  G06K9/3216 ,  G06K2007/10524 ,  G06T7/62 ,  G06T2207/10016 ,  G06T2207/10152

Abstract: A handheld device and method using the device, the device comprising a sensor receiving light from within a field of view (FOV) to generate a plurality of consecutive images of the FOV, a structured light source that is controllable to generate a plurality of light patterns, the source arranged to project at least one light patterns into the FOV where at least a portion of a pattern reflects from an object and is captured by the sensor and a processor to receive images, the processor programmed to control the source to project a pattern into the FOV, locate the pattern in at least one of the generated images, locate discontinuities in the pattern and use the discontinuities to measure at least one dimension.

公开(公告)号：US20140347473A1

公开(公告)日：2014-11-27

申请号：US14149774

申请日：2014-01-07

Applicant: Cognex Corporation

Inventor： Robert A. Wolff ,  Michael C. Moed ,  Mikhail Akopyan ,  Robert Tremblay ,  Willard Foster ,  Aaron S. Wallack

IPC: H04N7/18

CPC classification number: G01B11/2522 ,  G01B11/026 ,  G05B15/02 ,  G06K9/2081 ,  G06K9/3233 ,  G06T5/005 ,  G06T7/74 ,  G06T2200/24 ,  G06T2207/20072

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.

Abstract translation: 本发明提供了一种用于测量具有位移传感器的物体表面的位移的系统，该位移传感器在物体表面上突出一条线，并且在成像器处以在高度方向上限定多个位移值的方式从投影线接收光。 视觉系统处理器对成像器像素行进行操作，以确定多个感兴趣区域中的每一个中的成像器像素的列中的激光线中心。 每个感兴趣区域定义与对象表面上的投影线的预期位置相对应的多个行。 可以使用GUI来建立区域。 在另外的实施例中，系统利用成像器生成灰度图像。 这些灰度图像可以与生成的高度图像进行比较，以补偿对比度引起的假高度读数。 可以将成像器像素与参考电压进行比较以定位线。