Surface multi-point focusing system and method
A multi-point, focusing point technology, applied in the field of measurement, can solve problems such as low measurement efficiency and increased error
Inactive Publication Date: 2015-10-14
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
[0003] In the process of measuring the workpiece by the vision measuring instrument using the vision measuring system (Vision Measuring System, VMS), it is necessary to measure and evaluate the height of every minute point on the surface of the workpiece. However, the measurement of the fine points often requires the use of auxiliary equipment In order to meet customer requirements
In this way, it will inevitably lead to low measurement efficiency and increased error
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[0030] Such as figure 1 Shown is a functional block diagram of a preferred embodiment of the surface multi-point focusing system of the present invention. The surface multi-point focusing system 2 is applied to the image measuring instrument 1 to perform multi-point focusing on the surface of the workpiece and take points, so as to obtain the point cloud of the surface contour of the workpiece to accurately measure various aspects of the workpiece. In addition, in other embodiments, the surface multi-point focusing system 2 can also be applied in electronic devices connected to the image measuring instrument 1 , such as computers, servers, measuring instruments, and the like.
[0031] The image measuring instrument 1 includes a processor 10 and a storage device 12 . The processor 10 is used to execute various software installed in the image measuring instrument 1 , for example, application software such as the surface multi-point focusing system 2 and an operating system. Th...
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A measuring device and method is used to select focusing points on an object. A CCD of the measuring device is positioned at the top of an initial focusing range, then moves to the bottom of the initial focusing range at a first speed to capture first images of the object. Image points corresponding to each focusing point in the first images are identified to compute coordinates of a first focal point of each focusing point. The initial focusing range is updated according to Z-coordinates of the first focal points. The CCD is positioned at the bottom of the updated focusing range, then, moves to the top of the updated focusing range at a second speed to capture second images of the object. Image points corresponding to each focusing point in the second images are identified to compute coordinates of a second focal point of each focusing point.
Description
technical field [0001] The invention relates to a measurement technology, in particular to a system and method for performing multi-point focusing on the surface of a workpiece to realize measurement. Background technique [0002] The image measuring instrument is a kind of coordinate measuring machine, which can use an optical microscope to magnify and image the object to be measured at a free magnification, and transmit the enlarged image of the object to be measured to the computer connected to the instrument through the CCD camera system for Non-contact and efficient detection of geometric quantities of various complex workpieces. [0003] In the process of measuring the workpiece by the vision measuring instrument using the vision measuring system (Vision Measuring System, VMS), it is necessary to measure and evaluate the height of every minute point on the surface of the workpiece. However, the measurement of the fine points often requires the use of auxiliary equipmen...
Claims
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IPC IPC(8): G02B7/34G01C11/02G01B11/03G02B7/28
CPCG02B7/38G01B11/03
Inventor 张旨光陈贤艺袁忠奎薛晓光
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD