CN111060050B - Method for comprehensively verifying detection software of three-coordinate measuring machine - Google Patents
Method for comprehensively verifying detection software of three-coordinate measuring machine Download PDFInfo
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- CN111060050B CN111060050B CN201911409091.3A CN201911409091A CN111060050B CN 111060050 B CN111060050 B CN 111060050B CN 201911409091 A CN201911409091 A CN 201911409091A CN 111060050 B CN111060050 B CN 111060050B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
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Abstract
The invention discloses a method for comprehensively verifying detection software of a three-coordinate measuring machine, which comprises the following steps of: defining two non-coincident measuring points for a workpiece through detection software of a three-coordinate measuring machine, and sequentially establishing a plurality of associated workpiece coordinate systems; calculating coordinate values of the middle point of the connecting line of the two measuring points in each workpiece coordinate system through the detection software, and comparing the coordinate values with the coordinate values of the measuring points; and judging that the detection software is not in accordance with the requirement as long as the comparison relationship between the coordinate value of any measuring point in any workpiece coordinate system and the coordinate value of the midpoint of the connecting line of the measuring points is inconsistent, and otherwise, judging that the detection software is in accordance with the requirement. The invention can verify the accuracy of the software by effectively and comprehensively verifying the three-dimensional elements sampled and evaluated by the three-coordinate measuring machine detection software.
Description
Technical Field
The invention relates to the technical field of verification of three-coordinate measuring machines, in particular to a method for comprehensively verifying detection software of a three-coordinate measuring machine.
Background
The coordinate measuring machine is a detector which can move in three directions in space, and can calculate the coordinate of each element (x, y, z) of workpiece and measure each function by means of data processor or computer. The three-coordinate measuring machine comprises a mechanical structure part and a detection software part, wherein the detection software part is used for controlling the mechanical structure part to operate, acquiring detection data, processing data and outputting results. At present, the three-coordinate measuring machine is only limited to the examination and acceptance of the stability and incomplete detection software category. The necessary examination and acceptance of the detection software in the processes of sampling and data processing under different working conditions are lacked. In actual work, the detection data of the three-coordinate measuring machine is inaccurate in processing under different working conditions, for example, after a workpiece coordinate system is translated or rotated, the actual requirements cannot be met, and adverse effects on detection, production, quality control and the like are caused.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a method for comprehensively verifying the detection software of a three-coordinate measuring machine, which can effectively verify the accuracy of data sampling and processing.
The technical scheme of the invention is as follows:
a method for comprehensively verifying detection software of a three-coordinate measuring machine comprises the following steps:
defining two non-coincident measuring points for a workpiece through detection software of a three-coordinate measuring machine, and sequentially establishing a plurality of associated non-coincident workpiece coordinate systems;
calculating coordinate values of the middle point of the connecting line of the measuring points and the coordinate values of the measuring points in each workpiece coordinate system through detection software of the three-coordinate measuring machine;
comparing the coordinate value relationship between the measurement point and the coordinate value relationship between the connection line midpoints of the measurement points; and judging that the detection software does not meet the requirements as long as the coordinate value relationship of any measuring point in any workpiece coordinate system is inconsistent, and otherwise, judging that the detection software meets the requirements.
As a further improvement, the measuring points verify the conformity of the detection software under the condition that coordinate values are generated by transforming a coordinate system to have the same sign and different signs.
Further, the relationship between the length distance values of the two measuring points and the coordinate value of the middle point of the connecting line of the measuring points is a multiple relationship.
And further, inputting the coordinates of the measuring points into an EXCEL logic table, and automatically judging the verification by using an EXCEL logic formula.
Advantageous effects
Compared with the prior art, the invention has the advantages that: compared with the verification of GB/T16857.2-2006 and ISO 10360-2:2002 standards, the verification method is not comprehensive and can be used as a supplementary point, the correctness of detection software for processing detection data under different working conditions can be comprehensively verified, and the influence of the defects of the detection software on detection, production and quality control can be effectively avoided.
Drawings
FIG. 1 is a schematic diagram of the present invention for establishing a coordinate system of a workpiece and defining two measurement points;
FIG. 2 is a schematic diagram of a measurement point with a negative X value and another measurement point with a positive X value;
FIG. 3 is a diagram illustrating that the X values of two measurement points are all negative according to the present invention;
FIG. 4 is a diagram illustrating that the X values of two measurement points are all positive according to the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1-4, a method for comprehensively verifying inspection software of a coordinate measuring machine includes the steps of:
defining two non-coincident measuring points for a workpiece through detection software of a three-coordinate measuring machine, and sequentially establishing a plurality of associated non-coincident workpiece coordinate systems;
calculating the coordinate values of the middle point of the connecting line of the measuring points and the coordinate values of the measuring points in each workpiece coordinate system through detection software of a three-coordinate measuring machine;
comparing the coordinate value relationship between the measurement point and the middle point of the connecting line of the measurement points; and judging that the detection software does not meet the requirements as long as the coordinate value relationship of any measuring point in any workpiece coordinate system is inconsistent, and otherwise, judging that the detection software meets the requirements.
The measuring points are actual measuring sampling points or manual setting points or three-dimensional points generated by calculation of detection software, the manual setting points are points set randomly and manually, and the points generated by calculation of the detection software can be the middle points, the centers of gravity, the centers, the intersection points, the tangent points or other calculated points of elements.
And the measuring points verify the conformity of the detection software under the condition of generating the same number and different numbers of coordinate values by transforming the coordinate system. The coordinate values of the same coordinate axes of the two measurement points include the same sign and the different sign, that is, the two coordinate values of any one coordinate axis of the two measurement points which are not overlapped can be the same positive sign or negative sign, or the coordinate value of one point can be the positive sign, and the coordinate value of the other point can be the negative sign.
The relation between the length distance values of the two measuring points and the coordinate value of the middle point of the connecting line of the measuring points is a multiple relation. As shown in fig. 2: LXab＝2·LXc(ii) a The same principle is that:the projection point of the point c on each axis (X/Y/Z) is in the middle of the corresponding coordinate axes of the point a and the point b.
And inputting the coordinates of the measuring points into an EXCEL logic table, and automatically judging and verifying by using an EXCEL logic formula.
As shown in fig. 1 and 2, the tool B is an arbitrary cuboid, and two pin holes O, O are formed on the plane a and the plane a of the tool B1Establishing a workpiece coordinate system X-Y-Z, respectively sampling round holes (or three-dimensional elements such as cylinders and planes which can be marked as center/gravity coordinate values after sampling) on two end faces of the tool B by a three-coordinate measuring machine, and calculating to obtain circle center coordinates a (X-Y-Z) of the two round holesa,Ya,Za) And b (X)b,Yb,Zb) The X-axis coordinates of the point a and the point b are different signs, because the algorithms of the three coordinate measuring machine software in three coordinate axes are generally consistent, the embodiment only needs to illustrate the projection on the X-axis, and the Y/Z axes are identical in principle and can be verified, but the X/Y/Z three-axis data must be input into the EXCEL logic table for verification during software verification.
Let the midpoint of the ab line be c (X)c,Yc,Zc) The projection point of the midpoint c on the plane A is d, and the calculated length of the projection of ac or cb on the X axis is LXc；
Let the theoretical length of ab projection on X-axis be LXab，LXab＝[Xb-Xa]；
If LXc＝0.5·LXabIf so, the requirement is met, otherwise, the detection software is judged not to meet the requirement.
As shown in fig. 3 and 4, the origin O of the workpiece coordinate system X-Y-Z is translated so that the X-axis coordinates of the points a and b are both positive or negative, and the translation of the origin O of the workpiece coordinate system X-Y-Z is equivalent to establishing a different workpiece coordinate system X1-Y1-Z1, at which time, the X-Y-Z coordinates are respectively equal to a (X)a,Ya,Za)、b(Xb,Yb,Zb)、c(Xc,Yc,Zc) Corresponding a1 (X)a1,Ya1,Za1)、b1(Xb1,Yb1,Zb1)、c1(Xc1,Yc1,Zc1)；
Obtaining the calculated length LX of the projection of a1c1 or c1b1 on the X axis according to the algorithmc1Theoretical length LX of projection of a1b1 on the X-axisa1b1＝[Xb1-Xa1]；
If LXc1＝0.5·LXa1b1If so, the requirement is met, otherwise, the detection software is judged not to meet the requirement.
And inputting the coordinate values of a, b and c into an EXCEL logic table, and automatically judging by using an EXCEL logic formula. As shown in tables 1 to 3, the coordinate value of the first point a of the 2 nd behavior, the coordinate value of the second point b of the 3 rd behavior, the coordinate value of the midpoint c of the connection line of the 4 th behavior ab, and the 5 th behavior determination result. Wherein, the coordinate values of one point are all negative, and the coordinate values of the other point are all positive in table 1; table 2 shows that the coordinate values of the two points are all negative; in Table 3, the coordinate values of the two points are all positive. Taking the data in Table 1 as an example, LX is calculated by the detection softwarec(ii) LX is obtained from Table 1 as 5.5ab＝[10-(-1)]，LXc＝0.5·LXabThe requirements are met; LY is calculated by detection softwarec(4.5) obtaining LY from Table 1ab＝[10-(-1)]，LYc≠0.5·LYabI.e. LYac≠LYcbNot meeting the regulation; the detection software calculates to obtain LZcLZ from Table 1 as 12ab＝[10-(-2)]，LZc≠0.5·LZabNot meeting the regulation; and (4) conclusion: and detecting the operation error of software, and failing to meet the requirement. In the same way as in the verification methods of tables 2 and 3, in any case, the following is concluded: and detecting software errors and failing to meet the requirements. [ midpoint assessment: 1. taking the coordinate length value L as a numerical judgment basis; (used in the actual EXCEL logical decision: LXac＝LXcbNamely: xb-Xc＝Xc-Xa)2, the sign is reserved, and the absolute value cannot be used. "C (B)
TABLE 1
TABLE 2
TABLE 3
Compared with the verification of GB/T16857.2-2006 and ISO 10360-2:2002 standards, the verification method is not comprehensive and can be used as a supplementary point, the correctness of detection software for processing detection data under different working conditions can be comprehensively verified, and the influence of the defects of the detection software on detection, production and quality control can be effectively avoided.
The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (2)
1. A method for comprehensively verifying detection software of a three-coordinate measuring machine is characterized by comprising the following steps:
defining two non-coincident measuring points for a workpiece through detection software of a three-coordinate measuring machine, and sequentially establishing a plurality of associated non-coincident workpiece coordinate systems;
calculating coordinate values of the middle point of the connecting line of the measuring points and the coordinate values of the measuring points in each workpiece coordinate system through detection software of the three-coordinate measuring machine;
comparing the coordinate value relationship between the measurement point and the coordinate value relationship between the connection line midpoints of the measurement points; judging that the detection software is not in accordance with the requirement as long as the coordinate value relationship of any measuring point in any workpiece coordinate system is not in accordance, otherwise judging that the detection software is in accordance with the requirement;
the measuring points verify the conformity of the detection software under the condition of generating coordinate values with the same number and different numbers by transforming a coordinate system;
the relation between the length distance values of the two measuring points and the coordinate value of the middle point of the connecting line of the measuring points is a multiple relation.
2. The method of claim 1, wherein the coordinates of the measurement points are entered into an EXCEL logic form, and the verification is automatically determined using the EXCEL logic formula.
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