Measuring method and device for measuring irregular body size of workpiece
A measurement method and irregular technology, applied in the direction of measurement devices, calculations, details involving 3D image data, etc., can solve problems such as narrow application range and inaccurate calculations, so as to improve measurement accuracy, save system resources, and save reconstruction time Effect
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Embodiment 1
[0050] This embodiment provides a measurement method for measuring the size of workpiece irregularities. figure 1 The flow chart of the measurement method includes:
[0051] 101. Fix the workpiece to be measured at a specific position of the tooling, determine the layout position of the controllable points, and reasonably arrange the scanning station route, and scan the workpiece to be measured by the multi-joint three-dimensional laser scanner of the scanning module 201 .
[0052] Further, in this embodiment, the location of the controllable points is determined, specifically: the control points should be able to control the entire measurement workpiece, and the distribution should be uniform, and the controllable points should be arranged at least 3 points to meet the needs of the coordinate transformation, so The multi-joint 3D laser scanner scans according to the scanning station route to ensure a certain proportion of overlap between adjacent scanning stations.
[0053]...
Embodiment 2
[0080] Based on the above examples, image 3 It is a flow chart of the point cloud data processing method provided in this embodiment. This embodiment discloses the specific processing flow of the point cloud data processing module 202 in the previous embodiment, including point cloud registration 301, coordinate transformation 302, Point cloud classification 303, segmentation and thinning 304.
[0081] Among them, point cloud registration 301 is used to minimize the spatial position difference between point cloud data; coordinate transformation 302 is used to convert multiple scanner coordinate systems into a unified coordinate system; point cloud classification 303 is convenient for later point cloud data Separation and surface model construction; segmentation and thinning 304 facilitates three-dimensional surface reconstruction of huge point cloud data.
[0082] In this embodiment, the method for point cloud registration 301 includes:
[0083] By selecting the target ball...
Embodiment 3
[0091] This embodiment provides a measuring device for measuring the size of workpiece irregularities, such as Figure 4 As shown, the device includes a scanning device 401, a processor 402, a memory 403, an input device 404, and an output device 405; the number of processors 402 in the device may be one or more, Figure 4 Take a processor 402 as an example; the scanning device 401, processor 402, memory 403, input device 404 and output device 405 in the device can be connected by bus or other methods, Figure 4 Take connection via bus as an example.
[0092]The scanning device 401 is used to scan the specified surface or area of the workpiece, obtain the point cloud data of the measured workpiece, and store the scanned point cloud data into the memory 403 through the input device 404 . In addition, the scanning device 401 adopts a multi-joint three-dimensional laser scanner, and can use an optical measuring probe or a non-contact measuring probe to acquire point cloud data...
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