Method for metering distance between point and designed curved surface
A technology for measuring points and curved surfaces, which is applied in the field of measuring length, can solve problems such as application limitations, insufficient calculation speed, complicated calculation steps, etc., and achieve the effect of stable calculation, fast speed and improved calculation speed
Inactive Publication Date: 2005-01-26
OCEAN UNIV OF CHINA
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the calculation speed of this method is not fast enough, and the calculation steps are complicated, because the method needs to repeatedly calculate the distance from the point to the curve, so its application is limited
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0011] Below in conjunction with embodiment further illustrate the present invention:
[0012] Assuming that the distance from the point on the curved surface of the processed part to the designed curved surface does not exceed the design tolerance of 0.00211 cm, the processing is qualified.
[0013] Put the processed part on the three-coordinate measuring machine, touch the surface of the processed part with the probe of the measuring machine, measure the coordinates (53.70, 34.36, 86.00) of point p on the surface, and input it into the computer. The control point group of the designed surface in the computer (or the surface fitted by the point group on the processed surface measured by the measuring machine) is as follows:
[0014] (30, 40, 190), (65, 60, 170), (100, 60, 160),
[0015] (190, 65, 190), (30, 50, 150), (65, 70, 145),
[0016] (160, 55, 140), (190, 75, 150), (30, 60, 115);
[0017] The control point group can generate a quadratic Brzier design surface S(u, v)...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A measuring method for the distance from dot to the designed curved surface and is character by the use of coordinate-translation. The value range of parameters u, v of the designed curved surface are evenly divided into m segments and to separately calculate the coordinate of dot Q (u#-[i]v#-[j]) of the curved surface and choose v#-[j])' coordinate, the dot of the smallest square sum of coordinate value. If the common difference meets then the P is the qualified processing dot and stop the calculation; If not, choose the parameter [u#-[s-1], u#-[s+1]], [v#-[t-1] v#-[t+1]] determined by v#-[s], u#-[t] corresponding to Q' and evenly divide them into m sections and calculate the coordinates of these dots on the curved surface and choose the smallest one. If the common difference meets then the P is the qualified processing dot and stop the calculation; If not, then P isn't a qualified one and stop the calculation, otherwise repeat the above jobs. The advantages lie in the simple processes, stability, and high speed and applying to multi-parameter kinds of curved surface, such as B_SPLINE and NURBS etc.
Description
technical field [0001] The present invention relates to a method for measuring length, more specifically, relates to a method for calculating the distance from the point to the designed curved surface by measuring the point on the curved surface of the processed part by a three-coordinate measuring machine controlled by a computer. Background technique [0002] When using CNC machine tools to process dies, molds, gears, turbines or spacecraft components, etc., it is often required to accurately measure the distance from a point on the curved surface of the processed component to the designed curved surface to determine the processing accuracy. At present, it is generally measured by a three-coordinate measuring machine (CMM), and then simulated, positioned and calculated by computer. In the patent application with application number 96115777.1, the applicant disclosed a method of measuring the distance from a point on a curved surface of a processed part to a designed curved...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/02
Inventor 赵世麟
Owner OCEAN UNIV OF CHINA