发明名称 |
Vision measuring device and auto-focusing control method |
摘要 |
A vision measuring device includes: a camera which images a workpiece and transfers image information of the workpiece; a position control unit which controls an in-focus position of the camera and outputs the in-focus position as position information representing a position in a Z-axis direction; and a vision measuring machine which performs vision measurement on the workpiece based on image information and position information. The position control unit acquires and retains position information in response to a trigger signal output from the camera or the position control unit to the other at a certain timing of an imaging period during which the camera images the workpiece. The vision measuring machine calculates position information representing a position of image information in the Z-axis direction based on image information transferred from the camera and position information output from the position control unit, and performs auto-focusing control. |
申请公布号 |
US8809756(B1) |
申请公布日期 |
2014.08.19 |
申请号 |
US201414259480 |
申请日期 |
2014.04.23 |
申请人 |
Mitutoyo Corporation |
发明人 |
Yoshida Hiroyuki |
分类号 |
G05D3/12;G03B13/36;H04N5/232;G06T7/00 |
主分类号 |
G05D3/12 |
代理机构 |
Rankin, Hill & Clark LLP |
代理人 |
Rankin, Hill & Clark LLP |
主权项 |
1. A vision measuring device, comprising:
imaging device which images a measurement target and transfers image information representing an image of the measurement target; position control device which controls an in-focus position of the imaging device and outputs the in-focus position as position information representing a position in an in-focus axis direction; and vision measuring device which performs vision measurement on the measurement target based on the image information and the position information, wherein: the position control device acquires and retains the position information at a certain imaging timing of the imaging device; and the vision measuring device performs plural times of auto-focus searches along the in-focus axis direction by varying at least one of a moving velocity and a moving direction each time, obtains an amount of gap between the imaging timing and a timing at which the position information is acquired based on the image information transferred from the imaging device in each auto-focus search and the position information output from the position control device in each auto-focus search, and compensates for an in-focus position obtained in each auto-focus search based on the obtained amount of gap. |
地址 |
Kawasaki-Shi JP |