CN118242974A

CN118242974A - Method, system, equipment and medium for determining measurement and measurement information

Info

Publication number: CN118242974A
Application number: CN202211659623.0A
Authority: CN
Inventors: 胡林成; 杨建�; 季丽霞
Original assignee: Young Optics Kunshan Co ltd
Current assignee: Young Optics Kunshan Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2024-06-25

Abstract

The invention relates to a measuring and determining method, a system, equipment and a medium of measuring information, wherein a software system in a three-coordinate instrument does not have a physical modeling function, and the measuring information determining method of the three-coordinate instrument comprises the following steps: establishing a three-dimensional workpiece coordinate system of the workpiece to be measured based on the placing position and the clamping mode of the workpiece to be measured; determining coordinate values of measuring points corresponding to each measuring object on the workpiece to be measured in a three-dimensional workpiece coordinate system; correspondingly matching coordinate values of the measuring points in the three-dimensional workpiece coordinate system to the three-dimensional machine coordinate system; and generating a walking path of the measuring probe in the three-coordinate instrument based on the coordinate values of the measuring points corresponding to each measuring object in the three-dimensional machine coordinate system. The invention realizes the planning of the measuring process of the object to be measured, realizes the automatic measurement of the object to be measured by using the measuring probe, avoids the damage of the probe caused by manual operation, reduces the labor cost, improves the measuring efficiency and improves the measuring precision.

Description

Method, system, equipment and medium for determining measurement and measurement information

Technical Field

The present invention relates to a three-dimensional instrument (in particular, to a method, a system, a device, and a medium for determining measurement and measurement information of a three-dimensional instrument).

Background

The three-coordinate instrument (also called as three-coordinate measuring machine, three-coordinate measuring instrument) is a size measuring device widely used in the industries of machinery, electronics, instruments, plastics and the like, and the measuring process is to place the measured object in the measuring space of the three-coordinate measuring machine to obtain the three-dimensional space coordinate position of each measuring point on the measured object, and calculate the geometric size, shape and position of the measured object according to the space coordinate values of the points. Three-coordinate measuring machines are one of the most effective methods of measuring and obtaining dimensional data, as they can replace a variety of surface measuring tools and expensive combination gauges and reduce the time required for complex measuring tasks from small hours to minutes, an effect that is not achieved by other instruments.

The existing three-coordinate instrument without physical modeling (also called three-dimensional software modeling), such as a Micro-Vu (a fully automatic three-dimensional image measuring instrument in the united states), mainly uses optical image measurement, and has the problems that the software system is not provided with physical modeling, so that the measurement process of an object to be measured cannot be planned, the automatic measurement of the object to be measured cannot be carried out by using a probe, the manual measurement can only be carried out, the measurement process easily causes the damage of the measurement probe, the labor cost is high, the measurement efficiency is low, and the measurement precision is insufficient.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, a three-coordinate instrument without physical modeling cannot be used for planning a measurement process of an object to be measured, automatic measurement cannot be performed on the object to be measured by using a probe, manual measurement can be performed, the damage to a measurement probe is easy to cause, the labor cost is high, the measurement efficiency is low, and the measurement precision is insufficient.

The invention solves the technical problems by the following technical scheme:

In a first aspect, a method for determining measurement information of a three-dimensional instrument is provided, where a software system in the three-dimensional instrument does not have a physical modeling function, the method for determining measurement information includes:

establishing a three-dimensional workpiece coordinate system of a workpiece to be detected based on the placing position and the clamping mode of the workpiece to be detected;

Wherein the three-dimensional workpiece coordinate system is overlapped with a three-dimensional machine coordinate system of the three-coordinate instrument;

determining coordinate values of measuring points corresponding to each measuring object on the workpiece to be measured in the three-dimensional workpiece coordinate system;

Correspondingly matching coordinate values of the measuring points in the three-dimensional workpiece coordinate system to the three-dimensional machine coordinate system;

And generating a walking path of the measuring probe in the three-coordinate instrument based on the coordinate values of the measuring points corresponding to each measuring object in the three-dimensional machine coordinate system, wherein the walking path is used for representing the measuring information corresponding to the workpiece to be measured.

Preferably, the step of establishing a three-dimensional workpiece coordinate system of the workpiece to be measured based on the placement position and the clamping mode of the workpiece to be measured includes:

The placing position and the clamping mode of the workpiece to be detected are obtained, and the workpiece to be detected is fixed;

acquiring a workpiece image corresponding to the workpiece to be detected based on an optical lens of the three-coordinate instrument;

determining a coordinate origin, an X axis and a Y axis of the three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional plane coordinate system;

Controlling the measuring probe of the three-coordinate instrument to move to the origin of coordinates, and determining the reference plane of the three-dimensional workpiece coordinate system and the extending direction of a Z axis according to the relative position of the moving direction of the measuring probe relative to the two-dimensional plane coordinate system;

establishing an initial three-dimensional coordinate system based on the origin of coordinates, the X axis, the Y axis and the Z axis of the three-dimensional workpiece coordinate system;

the coordinate origin, the X axis, the Y axis and the Z axis of the three-dimensional workpiece coordinate system are respectively overlapped with the machine coordinate origin, the machine X axis, the machine Y axis and the machine Z axis of the three-dimensional machine coordinate system;

and carrying out preset operation on the initial three-dimensional coordinate system to obtain the three-dimensional workpiece coordinate system.

Preferably, the step of determining the origin of coordinates, the X-axis and the Y-axis of the three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional planar coordinate system includes:

Shooting an image of the workpiece to be detected based on an optical lens of the three-coordinate instrument to obtain a shooting image;

Selecting the origin of coordinates on a black-and-white boundary line of a pixel point in the shot image based on a preset selection rule;

And determining the X axis and the Y axis of the three-dimensional workpiece coordinate system based on the coordinate origin and the X axis direction and the Y axis direction of the machine of the three-dimensional machine coordinate system.

Preferably, the step of performing a preset operation on the initial three-dimensional coordinate system to obtain the three-dimensional workpiece coordinate system includes:

and carrying out coordinate zeroing operation on the initial three-dimensional coordinate system, and carrying out plane righting operation on the reference plane to obtain the three-dimensional workpiece coordinate system.

Preferably, the step of determining the coordinate value of the measuring point corresponding to each measuring object on the workpiece to be measured in the three-dimensional workpiece coordinate system includes:

for each measuring object, determining coordinate values of the measuring points corresponding to the measuring objects in the three-dimensional workpiece coordinate system based on associated parameters corresponding to the measuring objects marked on different design drawings of the workpiece to be measured;

Wherein the associated parameters include geometry and form and position tolerances.

Preferably, the step of generating the travel path of the measurement probe in the three-coordinate instrument based on the coordinate values of the measurement points corresponding to each measurement object in the three-dimensional machine coordinate system includes:

For each measuring object, determining the number of passing points, the sequence of the passing points and the coordinates of each passing point in the three-dimensional machine coordinate system when the measuring probe moves to the measuring point corresponding to the measuring object;

and generating a walking path of the measuring probe based on the number of passing points, the sequence of the passing points and the coordinates of each passing point in the three-dimensional machine coordinate system.

Preferably, the measurement information determining method further includes:

for the same measuring object, keeping the Z-axis coordinate corresponding to the measuring object fixed, and controlling the measuring probe to sequentially pass through the coordinate of each passing point according to the passing point sequence based on a linear operation mode and reach the measuring point corresponding to the measuring object;

and calculating to obtain a measurement result of the measurement object based on the coordinates of each passing point and the coordinates of the measurement point.

Preferably, the measurement information determining method further includes:

And storing the walking path of the measuring probe in the measuring process of the workpiece to be measured into the software system of the three-coordinate instrument so as to generate corresponding measuring information.

Preferably, the three-coordinate instrument comprises a Micro-Vu three-coordinate measuring machine, and the software system comprises InSpec (software of a three-coordinate instrument) system;

And/or the physical modeling includes CAD (Computer AIDED DESIGN) modeling.

In a second aspect, there is also provided a measurement method of a three-coordinate instrument, the measurement method including:

Acquiring a target measurement workpiece;

By adopting the measurement information determining method of the three-coordinate instrument, the target measurement workpiece is measured to obtain the measurement result of the target measurement workpiece.

Preferably, the measuring method further comprises;

And calling measurement information stored in advance in the three-coordinate instrument software system for measuring each target measurement workpiece in sequence for a plurality of target measurement workpieces with the same design specification.

In a third aspect, there is also provided a measurement information determination system of a three-coordinate instrument, the measurement information determination system including:

The coordinate system establishing module is used for establishing a three-dimensional workpiece coordinate system of the workpiece to be tested based on the placing position and the clamping mode of the workpiece to be tested;

the coordinate value determining module is used for determining the coordinate value of the measuring point corresponding to each measuring object on the workpiece to be measured in the three-dimensional workpiece coordinate system;

The coordinate value matching module is used for correspondingly matching the coordinate value of the measuring point in the three-dimensional workpiece coordinate system to the three-dimensional machine coordinate system;

The probe path generation module is used for generating a walking path of the measurement probe in the three-coordinate instrument based on the coordinate values of the measurement points corresponding to each measurement object in the three-dimensional machine table coordinate system, and the walking path is used for representing measurement information corresponding to the workpiece to be measured.

Preferably, the coordinate system establishment module includes:

The workpiece fixing unit is used for acquiring the placing position and the clamping mode of the workpiece to be detected and fixing the workpiece to be detected;

The workpiece image acquisition unit is used for acquiring a workpiece image corresponding to the workpiece to be detected based on an optical lens of the three-coordinate instrument;

a two-dimensional coordinate system establishing unit for determining a coordinate origin, an X axis and a Y axis of the three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional plane coordinate system;

The Z-axis determining unit is used for controlling the measuring probe of the three-coordinate instrument to move to the origin of coordinates and determining a reference plane of the three-dimensional workpiece coordinate system and the extending direction of the Z-axis according to the relative position of the moving direction of the measuring probe relative to the two-dimensional plane coordinate system;

An initial coordinate system establishing unit configured to establish an initial three-dimensional coordinate system based on the origin of coordinates, the X axis, the Y axis, and the Z axis of the three-dimensional workpiece coordinate system;

And the workpiece coordinate system establishing unit is used for carrying out preset operation on the initial three-dimensional coordinate system to obtain the three-dimensional workpiece coordinate system.

Preferably, the two-dimensional coordinate system establishing unit is specifically configured to take an image of the workpiece to be measured based on an optical lens of the three-coordinate instrument to obtain a taken image;

Preferably, the workpiece coordinate system establishing unit is specifically configured to perform coordinate zeroing operation on the initial three-dimensional coordinate system, and perform plane righting operation on the reference plane, so as to obtain the three-dimensional workpiece coordinate system.

Preferably, the coordinate value determining module is specifically configured to determine, for each measurement object, a coordinate value of the measurement point corresponding to the measurement object in the three-dimensional workpiece coordinate system based on association parameters corresponding to the measurement object marked on different design drawings of the workpiece to be measured;

Preferably, the probe path generating module includes:

The passing point determining unit is used for determining the number of passing points, the passing point sequence and the coordinates of each passing point in the three-dimensional machine coordinate system when the measuring probe moves to the measuring point corresponding to the measuring object;

And the path generation unit is used for generating a walking path of the measurement probe based on the number of the passing points, the sequence of the passing points and the coordinates of each passing point in the three-dimensional machine coordinate system.

Preferably, the measurement information determining system of the three-coordinate instrument further comprises:

The probe control module is used for keeping the Z-axis coordinate corresponding to the measurement object fixed for the same measurement object, controlling the measurement probe to sequentially pass through the coordinate of each passing point according to the passing point sequence based on a linear operation mode, and reaching the measurement point corresponding to the measurement object;

And the measurement result calculation module is used for calculating the measurement result of the measurement object based on the coordinates of each passing point and the coordinates of the measurement point.

and the probe path storage module is used for storing the walking path of the measuring probe in the software system of the three-coordinate instrument in the measuring process of the workpiece to be measured so as to generate corresponding measuring information.

Preferably, the three-coordinate instrument comprises a Micro-Vu three-coordinate measuring instrument, and the software system comprises a InSpec system;

and/or, the physical modeling comprises CAD modeling.

In a fourth aspect, there is also provided a measurement system of a three-coordinate instrument, the measurement system comprising:

The workpiece acquisition module is used for acquiring a target measurement workpiece;

And the measuring module is used for measuring the target measuring workpiece by adopting the measuring information determining system of the three-coordinate instrument so as to obtain a measuring result of the target measuring workpiece.

In a fifth aspect, there is also provided a three-coordinate instrument comprising the measurement system of the three-coordinate instrument described above.

In a sixth aspect, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and configured to run on the processor, where the processor implements the method for determining measurement information of the three-coordinate apparatus or the method for measuring the three-coordinate apparatus when executing the computer program.

In a seventh aspect, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor, implements the method for determining measurement information of a three-coordinate instrument described above, or the method for measuring a three-coordinate instrument described above.

On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.

The invention has the positive progress effects that:

According to the method, the system, the equipment and the medium for determining the measurement and the measurement information of the three-dimensional instrument, when a software system in the three-dimensional instrument does not have a physical modeling function, a three-dimensional workpiece coordinate system of a workpiece to be measured is established based on the placement position and the clamping mode of the workpiece to be measured, the three-dimensional workpiece coordinate system is enabled to be overlapped with a three-dimensional machine coordinate system of the three-dimensional instrument, the coordinate values of measurement points corresponding to each measurement object on the workpiece to be measured in the three-dimensional workpiece coordinate system are matched into the three-dimensional machine coordinate system according to the coordinate values of the measurement points in the three-dimensional workpiece coordinate system, a walking path of a measurement probe is further generated, the walking path of the measurement probe is planned, the measurement information corresponding to the workpiece to be measured is obtained, planning of the measurement process of the object to be measured is achieved, automatic measurement of the object to be measured by using the measurement probe is achieved, probe damage caused by manual operation is avoided, the labor cost is reduced, the measurement efficiency is improved, and the measurement accuracy is improved.

Drawings

FIG. 1 is a schematic flow chart of a measurement information determining method of a three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 2 is a second flow chart of the method for determining measurement information of the three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a workpiece model to be tested formed by a design drawing of the workpiece to be tested and a three-dimensional workpiece coordinate system provided in embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the enlarged design drawing of the workpiece to be tested in FIG. 3;

FIG. 5 is a schematic view of a model of a workpiece to be measured formed by the three-dimensional workpiece coordinate system of the enlarged workpiece to be measured in FIG. 3;

FIG. 6 is a third flow chart of the method for determining measurement information of the three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of measurement errors in the measurement information determining method of the three-coordinate apparatus according to embodiment 1 of the present invention;

FIG. 8 is a fourth flowchart of the method for determining measurement information of the three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 9 is a fifth flowchart of the measurement information determining method of the three-coordinate apparatus according to embodiment 1 of the present invention;

FIG. 10 is a first schematic diagram illustrating a path setup of a probe in the method for determining measurement information of a three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 11 is a second schematic diagram of a path setup of a probe in the method for determining measurement information of a three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 12 is a third schematic diagram illustrating a path setup of a probe in the method for determining measurement information of a three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 13 is a sixth flowchart of a measurement information determining method of the three-dimensional instrument according to embodiment 1 of the present invention;

FIG. 14 is a flow chart of a measuring method of a three-dimensional instrument according to embodiment 2 of the present invention;

FIG. 15 is a schematic diagram of a measurement information determining system of a three-coordinate apparatus according to embodiment 3 of the present invention;

FIG. 16 is a schematic diagram of a three-dimensional measuring system according to embodiment 4 of the present invention;

Fig. 17 is a schematic structural diagram of an electronic device according to embodiment 6 of the present invention.

Detailed Description

The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.

Example 1

The embodiment provides a measurement information determining method of a three-coordinate instrument, wherein a software system in the three-coordinate instrument does not have a physical modeling function, as shown in fig. 1, the measurement information determining method comprises the following steps:

S101, establishing a three-dimensional workpiece coordinate system of the workpiece to be measured based on the placement position and the clamping mode of the workpiece to be measured.

Wherein, the three-dimensional workpiece coordinate system coincides with the three-dimensional machine coordinate system of the three-coordinate instrument.

After the workpiece to be measured is clamped once, the placing position and the clamping mode can ensure that all measuring points can be found smoothly, the interference between the workpiece to be measured and the probe is avoided, and the error generated by the clamping mode is reduced.

S102, determining coordinate values of measuring points corresponding to each measuring object on the workpiece to be measured in a three-dimensional workpiece coordinate system.

The workpiece to be measured consists of a plurality of measuring objects with different shapes and sizes, the number and the positions of the measuring points are set according to the shape of each measuring object, and the coordinate values of the measuring points in a three-dimensional workpiece coordinate system are obtained.

S103, correspondingly matching the coordinate values of the measuring points in the three-dimensional workpiece coordinate system into the three-dimensional machine coordinate system.

Because the three-dimensional workpiece coordinate system is overlapped with the three-dimensional machine coordinate system of the three-dimensional instrument, the coordinate values of the measuring points in the three-dimensional workpiece coordinate system can be correspondingly matched into the three-dimensional machine coordinate system, and the movement of the measuring probe in the three-dimensional machine coordinate system is matched with the measuring process of the workpiece to be measured, so that the following planning of the walking path of the measuring probe is facilitated.

S104, generating a walking path of the measuring probe in the three-coordinate instrument based on the coordinate values of the measuring points corresponding to each measuring object in the three-dimensional machine coordinate system.

The walking path is used for representing measurement information corresponding to the workpiece to be measured. Each workpiece to be measured with a unique design specification corresponds to respective measurement information, which can also be called measurement programming, and the measurement information records a walking path corresponding to the measurement process of the workpiece to be measured by the measurement probe.

According to the measurement information determining method of the three-coordinate instrument, when a software system in the three-coordinate instrument does not have a physical modeling function, a three-dimensional workpiece coordinate system of a workpiece to be measured is established based on the placement position and the clamping mode of the workpiece to be measured, the three-dimensional workpiece coordinate system is enabled to coincide with a three-dimensional machine coordinate system of the three-coordinate instrument, coordinate values of measurement points corresponding to each measurement object on the workpiece to be measured in the three-dimensional workpiece coordinate system are matched into the three-dimensional machine coordinate system according to coordinate values of the measurement points in the three-dimensional workpiece coordinate system, a walking path of a measurement probe is generated, the walking path of the measurement probe is planned, measurement information corresponding to the workpiece to be measured is obtained, planning of a measurement process of the object to be measured is achieved, automatic measurement of the object to be measured by using the measurement probe is achieved, probe damage caused by manual operation is avoided, labor cost is reduced, measurement efficiency is improved, and measurement accuracy is improved.

In an alternative embodiment, as shown in fig. 2, the step S101 includes:

S1011, acquiring the placing position and the clamping mode of the workpiece to be tested, and fixing the workpiece to be tested.

And proper placement positions and clamping modes are selected, and the workpiece to be tested is clamped and fixed, so that measurement comprehensiveness and measurement accuracy after one-time fixation are ensured.

S1012, acquiring a workpiece image corresponding to the workpiece to be detected based on an optical lens of the three-coordinate instrument.

The optical lens is arranged in the three-coordinate instrument, and when the workpiece to be measured is fixed on the machine test surface of the three-coordinate instrument, the workpiece to be measured is subjected to impact grabbing through the optical lens, so that a workpiece image corresponding to the workpiece to be measured is obtained.

S1013, determining a coordinate origin, an X axis and a Y axis of a three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional plane coordinate system.

S1014, controlling a measuring probe of the three-coordinate instrument to move to a coordinate origin, and determining a reference plane of a three-dimensional workpiece coordinate system and the extending direction of a Z axis according to the relative position of the moving direction of the measuring probe relative to the two-dimensional plane coordinate system.

In the process of moving the measuring probe to the origin of coordinates, the extending direction of the Z axis can be determined according to the relative position of the moving direction of the measuring probe relative to the two-dimensional plane coordinate system, and the plane formed by the X axis, the Y axis and the origin of coordinates is the reference plane when the Z axis is determined.

S1015, establishing an initial three-dimensional coordinate system based on the coordinate origin, the X axis, the Y axis and the Z axis of the three-dimensional workpiece coordinate system.

Wherein, the X axis, the Y axis and the Z axis of the three-dimensional workpiece coordinate system are mutually perpendicular and intersect at a coordinate origin; the coordinate origin, the X axis, the Y axis and the Z axis of the three-dimensional workpiece coordinate system are respectively overlapped with the machine coordinate origin, the machine X axis, the machine Y axis and the machine Z axis of the three-dimensional machine coordinate system.

S1016, performing preset operation on the initial three-dimensional coordinate system to obtain a three-dimensional workpiece coordinate system.

The preset operation comprises, but is not limited to, a coordinate zeroing operation and a plane righting operation.

And carrying out coordinate zeroing operation on the initial three-dimensional coordinate system, and ensuring that the coordinates of an X axis, a Y axis and a Z axis corresponding to the origin of the coordinates are all 0, namely the origin coordinate value is (0, 0). If the reference surface has a certain inclination, carrying out plane righting operation on the reference surface, ensuring that the reference surface is parallel to the machine test surface, ensuring that the Z axis of the three-dimensional workpiece coordinate system is perpendicular to the machine test surface, and ensuring that the X axis and the Y axis of the three-dimensional workpiece coordinate system are parallel to the machine test surface.

Fig. 3 is a schematic diagram of a workpiece model to be measured formed by a design drawing of the workpiece to be measured and a three-dimensional workpiece coordinate system, fig. 4 is a schematic diagram of the design drawing of the workpiece to be measured enlarged in fig. 3, and fig. 5 is a schematic diagram of the workpiece model to be measured formed by the three-dimensional workpiece coordinate system of the workpiece to be measured enlarged in fig. 3; as shown in fig. 4, a reference and a reference B are marked on a design drawing, wherein the reference a is a reference circle, is an evaluation reference of concentricity, relates to position tolerance, and other circles evaluate concentricity through the circle reference; the B reference is a plane reference. I.e. the plane formed by the X-axis, Y-axis and the origin of coordinates of the three-dimensional workpiece coordinate system.

As shown in fig. 5, the B reference is a plane formed by the X axis, the Y axis, where the three-dimensional object coordinate system is located, and the origin of coordinates. The Z-axis coordinate of the workpiece to be measured, which is positioned above the reference plane, is a positive value, and the Z-axis coordinate of the workpiece to be measured, which is positioned below the reference plane, is a negative value. In the workpiece model to be measured, the size values of the respective measurement objects are marked.

For a workpiece to be measured, the reference plane of which is marked in the design drawing, such as the B reference in fig. 4, the reference plane can be selected as the reference plane in the three-dimensional workpiece coordinate system, such as the B reference shown in fig. 5, and the origin coordinates, the X axis, the Y axis and the Z axis are established on the B reference.

Fig. 6 is a schematic third flow chart of the measurement information determining method of the three-dimensional instrument according to the present embodiment, specifically, according to the requirements of points, lines and planes, the three-dimensional workpiece coordinate system and the reference plane of the workpiece to be measured are obtained by referring to steps S1011-S1016. As shown in fig. 6, after the correction of the optical lens and the measuring probe is completed, coordinate origin is firstly found, line is found according to the direction determination line, plane is found according to the inclined determination plane, length, width and flatness are measured according to the datum line and the datum plane of the drawing of the workpiece to be measured (the material to be measured), and the measuring process is stored. The measuring point paths sequentially correspond to points, lines, planes, lengths, widths and planeness. Measuring the corresponding point, line, plane and cuboid of element change. The measurement instructions in fig. 6 correspond to individual instruction buttons in the software system of the three-coordinate instrument.

Fig. 7 is a schematic diagram of measurement errors in the measurement information determining method of the three-coordinate apparatus according to the present embodiment, as shown in fig. 7, for the repeated measurement errors of the same workpiece to be measured, the measurement error (i.e. automatic measurement error) of the present application is within 3um compared with the manual measurement error, so as to improve the measurement accuracy.

According to the measurement information determining method of the three-coordinate instrument, a three-dimensional workpiece coordinate system of a workpiece to be measured is established, the three-dimensional workpiece coordinate system is guaranteed to be overlapped with a three-dimensional machine coordinate system of the three-coordinate instrument, an engineer can conveniently plan a measurement process of an object to be measured, the measurement information determining efficiency is improved, automatic measurement of the object to be measured by using a measurement probe is achieved, probe damage caused by manual operation is avoided, labor cost is reduced, measurement efficiency is improved, and measurement accuracy is improved.

In an alternative embodiment, the step S1013 includes:

S10131, shooting an image of a workpiece to be detected based on an optical lens of a three-coordinate instrument to obtain a shooting image;

S10132, selecting a coordinate origin on a black-and-white boundary line of a pixel point in the shot image based on a preset selection rule;

s10133, determining an X axis and a Y axis of the three-dimensional workpiece coordinate system based on the coordinate origin and the machine X axis direction and the machine Y axis direction of the three-dimensional machine coordinate system.

The resolution of the optical lens is black-and-white resolution, the optical image measurement is to measure the product distance by using the distance of the pixel points, the full black area or the full white area of the pixel points can not obtain the product information, and only the black-and-white interval of the pixel points can form a black-and-white boundary line or form the intersection point of the black-and-white boundary line. When an optical lens is used for finding a coordinate origin, selecting the coordinate origin on a black-and-white demarcation line of a pixel point in a shot image based on a preset selection rule; the preset selection rule may be to select the position with the most obvious black and white as the origin of coordinates, or may be to select a point on the black and white demarcation line as the origin of coordinates, where the origin of coordinates is preferably a circle tangent point or a line segment intersection point.

After the origin of coordinates is determined, the X axis and the Y axis of the three-dimensional workpiece coordinate system can be determined by referring to the X axis direction and the Y axis direction of the machine of the three-dimensional machine coordinate system, so as to ensure that the X axis and the Y axis of the three-dimensional workpiece coordinate system are respectively overlapped with the X axis and the Y axis of the three-dimensional workpiece coordinate system.

In an alternative embodiment, as shown in fig. 8, the step S102 includes:

s1021, for each measuring object, determining coordinate values of measuring points corresponding to the measuring objects in a three-dimensional workpiece coordinate system based on associated parameters corresponding to the measuring objects marked on different design drawings of the workpiece to be measured.

Wherein the associated parameters include geometry and form and position tolerances. For example, the associated parameters include length, width, height, diameter, straightness, flatness, roundness, cylindricity, perpendicularity, inclination, parallelism, positional and concentricity, and the like.

Generally, the workpiece to be measured corresponds to design drawings such as a front view, a top view, a side view, a section view and the like, and related parameters of the same measuring object are marked on different design drawings. For example, only the length and width of the measurement object can be seen on one drawing, while the height of the measurement object can be seen on the other drawing. And integrating the associated parameters corresponding to the measuring objects marked on different design drawings of the workpiece to be measured, and determining the coordinate values of the measuring points corresponding to the measuring objects in the three-dimensional workpiece coordinate system.

In an alternative embodiment, as shown in fig. 9, the step S104 includes:

s1041, for each measuring object, determining the number of passing points, the sequence of the passing points and the coordinates of each passing point in the three-dimensional machine coordinate system when the measuring probe moves to the measuring point corresponding to the measuring object.

S1042, generating a walking path of the measurement probe based on the number of passing points, the sequence of the passing points and the coordinates of each passing point in the three-dimensional machine coordinate system.

Because the measuring probe can only perform linear motion, namely the measuring probe can only perform straight up operation, straight down operation, straight left operation and straight right operation. Therefore, in the process of measuring the measurement object, if the probe cannot walk at one time to reach the measurement point, it is necessary to reach the measurement point by means of a plurality of energizing points.

FIG. 10 is a schematic view of the path setup of the probe when the measurement object is a convex object; FIG. 11 is a schematic view of the path arrangement of the probe when the measurement object is a right angle object; fig. 12 is a schematic view of the path setting of the probe when the measurement object is a cylindrical object.

As shown in fig. 10, the object to be measured is a right angle object, and the probe position of the measurement probe is the start point, from which 3 passing points are routed to reach the measurement point position for measurement.

As shown in fig. 11, the object to be measured is a right-angle object, and from the probe position, 2 passing points are routed to the measuring point position for measurement.

As shown in fig. 12, the object to be measured is a cylindrical object, and from the probe position, 2 passing points are routed to the measuring point position for measurement.

In the actual measurement process, the measurement points are set according to the specific shape of each measurement object, and then the number and the positions of the passing points are set.

According to the measurement information determining method of the three-coordinate instrument, through setting the passing points of the probe, the walking path of the measurement probe is accurately and safely planned, the occurrence of the firing pin condition in the measurement process is avoided, the automatic measurement of an object to be measured by using the measurement probe is realized, the damage of the probe caused by manual operation is avoided, the labor cost is reduced, the measurement efficiency is improved, and the measurement precision is improved.

In an alternative embodiment, as shown in fig. 13, the measurement information determining method further includes:

S105, for the same measuring object, keeping the Z-axis coordinate corresponding to the measuring object fixed, controlling the measuring probe to sequentially pass through the coordinate of each passing point according to the passing point sequence based on the linear operation mode, and reaching the measuring point corresponding to the measuring object.

S106, calculating to obtain a measurement result of the measurement object based on the coordinates of each passing point and the coordinates of the measurement point.

Because the measuring probe can only perform linear motion, the measuring probe needs to pass through the coordinates of each passing point in sequence according to the passing point sequence by controlling the mode of linear motion, and reach the measuring point corresponding to the measuring object.

According to the coordinates of each passing point and the coordinates of the measuring point, the measuring result of the measuring object can be obtained through calculation of the coordinates, numerical operation, conversion and other operations. The measurement result includes size information, position information, tolerance information, and the like of the measurement object.

The measurement information determining method of the three-coordinate instrument reduces measurement errors and improves measurement accuracy.

In an alternative embodiment, the method for determining measurement information further includes:

And storing the walking path of the measuring probe in the measuring process of the workpiece to be measured into a software system of the three-coordinate instrument to generate corresponding measuring information.

After the measurement of the workpiece to be measured is finished, storing the walking path of the measuring probe into a software system of a three-coordinate instrument to generate measurement information corresponding to the workpiece to be measured. So as to conveniently call the measurement information to measure the workpieces with the same design specification.

In an alternative embodiment, the three-coordinate instrument comprises a Micro-Vu three-coordinate instrument and the software system comprises a InSpec system.

The Micro-Vu three-coordinate measuring instrument is provided with a non-contact three-dimensional geometric measuring system, a projector comparison system, a tool microscope amplifying system, a measuring graph and image shooting printing system, a data analysis and data input/output system, and can realize accurate measurement of objects based on image measurement.

In an alternative embodiment, the physical modeling includes CAD modeling.

The InSpec system of the Micro-Vu three-coordinate measuring machine does not have a CAD modeling function, so that a three-dimensional workpiece coordinate system cannot be established for a workpiece to be measured, and further, the coincidence of the three-dimensional workpiece coordinate system and a three-dimensional machine coordinate system of the three-coordinate measuring machine cannot be ensured, and automatic measurement of the workpiece to be measured by using the Micro-Vu three-coordinate measuring machine cannot be realized.

The measurement information determining method of the three-coordinate instrument can be applied to a Micro-Vu three-coordinate measuring instrument, and further the measurement information determining and measuring of the workpiece to be measured by using the Micro-Vu three-coordinate measuring instrument are realized.

Example 2

The present embodiment provides a measurement method of a three-coordinate apparatus, as shown in fig. 14, the measurement method includes:

S201, acquiring a target measurement workpiece.

S201, measuring the target measured workpiece by adopting the measuring information determining method of the three-coordinate instrument in the embodiment 1 to obtain a measuring result of the target measured workpiece.

According to the method for determining the measurement information of the three-dimensional instrument in the embodiment 1, when a target measurement workpiece is required to be measured, the method for determining the measurement information of the three-dimensional instrument in the embodiment 1 is adopted, a three-dimensional workpiece coordinate system of the workpiece to be measured is established based on the placement position and the clamping mode of the workpiece to be measured, the three-dimensional workpiece coordinate system is enabled to coincide with a three-dimensional machine coordinate system of the three-dimensional instrument, coordinate values of measurement points corresponding to each measurement object on the workpiece to be measured in the three-dimensional workpiece coordinate system are matched into the three-dimensional machine coordinate system according to coordinate values of the measurement points in the three-dimensional workpiece coordinate system, a walking path of a measurement probe is generated, the walking path of the measurement probe is planned, measurement information corresponding to the workpiece to be measured is obtained, the measurement process of the object to be measured is planned, automatic measurement of the object to be measured by using the measurement probe is achieved, probe damage caused by manual operation is avoided, the labor cost is reduced, and the measurement accuracy is improved.

In an alternative embodiment, the measuring method further comprises;

And for a plurality of target measurement workpieces with the same design specification, invoking measurement information stored in advance in a three-coordinate instrument software system to measure each target measurement workpiece in sequence.

For example, 30 target measurement workpieces with the same design specification are stored in a software system of the three-coordinate instrument after the first target measurement workpiece is measured, and for the second target measurement workpiece, the corresponding measurement information stored in the software system of the three-coordinate instrument is directly called to measure the target measurement workpiece until all the target measurement workpieces are measured.

Example 3

The present embodiment provides a measurement information determining system of a three-coordinate apparatus, as shown in fig. 15, the measurement information determining system includes:

The coordinate system establishing module 1 is used for establishing a three-dimensional workpiece coordinate system of the workpiece to be measured based on the placing position and the clamping mode of the workpiece to be measured;

wherein, the three-dimensional workpiece coordinate system is overlapped with the three-dimensional machine coordinate system of the three-coordinate instrument;

The coordinate value determining module 2 is used for determining the coordinate value of the measuring point corresponding to each measuring object on the workpiece to be measured in the three-dimensional workpiece coordinate system;

The coordinate value matching module 3 is used for correspondingly matching the coordinate value of the measuring point in the three-dimensional workpiece coordinate system into the three-dimensional machine coordinate system;

The probe path generating module 4 is configured to generate a walking path of the measurement probe in the three-coordinate instrument based on coordinate values of the measurement points corresponding to each measurement object in the three-dimensional machine coordinate system, where the walking path is used to represent measurement information corresponding to the workpiece to be measured.

In an alternative embodiment, the coordinate system creation module 1 includes:

The workpiece fixing unit 11 is used for acquiring the placing position and the clamping mode of the workpiece to be tested and fixing the workpiece to be tested;

A workpiece image acquiring unit 12, configured to acquire a workpiece image corresponding to a workpiece to be measured based on an optical lens of a three-coordinate instrument;

A two-dimensional coordinate system establishing unit 13 for determining the origin of coordinates, the X-axis and the Y-axis of the three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional plane coordinate system;

a Z-axis determining unit 14 for controlling the movement of the measurement probe of the three-dimensional instrument to the origin of coordinates and determining a reference plane of the three-dimensional workpiece coordinate system and an extending direction of the Z-axis according to a relative position of the movement direction of the measurement probe with respect to the two-dimensional plane coordinate system;

An initial coordinate system establishing unit 15 for establishing an initial three-dimensional coordinate system based on the coordinate origin, the X-axis, the Y-axis, and the Z-axis of the three-dimensional workpiece coordinate system;

The workpiece coordinate system establishing unit 16 is used for performing preset operation on the initial three-dimensional coordinate system to obtain a three-dimensional workpiece coordinate system.

In an alternative embodiment, the two-dimensional coordinate system establishing unit 13 is specifically configured to take an image of the workpiece to be measured based on an optical lens of the three-coordinate apparatus to obtain a taken image;

selecting a coordinate origin on a black-and-white demarcation line of a pixel point in a shot image based on a preset selection rule;

And determining the X axis and the Y axis of the three-dimensional workpiece coordinate system based on the coordinate origin and the machine X axis direction and the machine Y axis direction of the three-dimensional machine coordinate system.

In an alternative embodiment, the workpiece coordinate system establishing unit 16 is specifically configured to perform a coordinate zeroing operation on the initial three-dimensional coordinate system, and perform a plane centering operation on the reference plane, so as to obtain the three-dimensional workpiece coordinate system.

In an optional embodiment, the coordinate value determining module 2 is specifically configured to determine, for each measurement object, a coordinate value of a measurement point corresponding to the measurement object in a three-dimensional workpiece coordinate system based on associated parameters corresponding to the measurement object marked on different design drawings of the workpiece to be measured;

In an alternative embodiment, the probe path generation module 4 includes:

A passing point determining unit 41, configured to determine, for each measurement object, the number of passing points, the passing point sequence, and coordinates of each passing point in the three-dimensional machine coordinate system when the measurement probe moves to the measurement point corresponding to the measurement object;

the path generating unit 42 is configured to generate a travel path of the measurement probe based on the number of passing points, the order of passing points, and coordinates of each passing point in the three-dimensional machine coordinate system.

In an alternative embodiment, the measurement information determining system of the three-coordinate instrument further includes:

The probe control module 5 is used for keeping the Z-axis coordinate corresponding to the measurement object fixed for the same measurement object, controlling the measurement probe to sequentially pass through the coordinate of each passing point according to the passing point sequence based on the linear operation mode, and reaching the measuring point corresponding to the measurement object;

And the measurement result calculation module 6 is used for calculating and obtaining the measurement result of the measurement object based on the coordinates of each passing point and the coordinates of the measurement point.

And the probe path storage module 7 is used for storing the walking path of the measuring probe in the measuring process of the workpiece to be measured into a software system of the three-coordinate instrument so as to generate corresponding measuring information.

In an alternative embodiment, the three-coordinate instrument comprises a Micro-Vu three-coordinate instrument, and the software system comprises a InSpec system;

and/or in an alternative embodiment, the physical modeling comprises CAD modeling.

The working principle of the measurement information determining system of the three-coordinate apparatus of the present embodiment is the same as that of the measurement information determining method of the three-coordinate apparatus of embodiment 1, and will not be described here again.

The measurement information determining system of the three-coordinate instrument of the embodiment realizes planning of the measurement process of the object to be measured, realizes automatic measurement of the object to be measured by using the measurement probe, reduces labor cost and improves measurement efficiency.

Example 4

The present embodiment provides a measurement system of a three-coordinate apparatus, as shown in fig. 16, the measurement system includes:

a workpiece acquisition module 8 for acquiring a target measurement workpiece;

The measurement module 9 is configured to measure the target measurement workpiece by using the measurement information determining system of the three-coordinate apparatus in embodiment 3, so as to obtain a measurement result of the target measurement workpiece.

In an alternative embodiment, the measurement system further comprises

And the measurement information calling module 10 is used for calling the measurement information pre-stored in the three-coordinate instrument software system to measure each target measurement workpiece in sequence for a plurality of target measurement workpieces with the same design specification.

The working principle of the measurement system of the three-coordinate apparatus in this embodiment is the same as that of the three-coordinate apparatus in embodiment 2, and will not be described here again.

The measuring system of the three-coordinate instrument of the embodiment realizes planning of the measuring process of the target measuring workpiece, realizes automatic measurement of the target measuring workpiece by using the measuring probe, avoids probe damage caused by manual operation, reduces labor cost, improves measuring efficiency and improves measuring precision.

Example 5

The present embodiment provides a three-coordinate instrument including the measurement system of the three-coordinate instrument in embodiment 4.

The three-coordinate instrument also comprises a measuring probe, an optical lens, a machine table and other devices so as to form a complete three-coordinate instrument.

The three-coordinate instrument integrates the measuring system of the three-coordinate instrument in the embodiment 4, realizes automatic measurement of an object to be measured by using the measuring probe, avoids probe damage caused by manual operation, reduces labor cost, improves measuring efficiency and improves measuring precision.

Example 6

An electronic device is provided in this embodiment, and fig. 17 is a schematic structural diagram of the electronic device provided in this embodiment, where the electronic device includes a memory, a processor, and a computer program stored on the memory and capable of running on the processor, and the processor implements the measurement information determining method of the three-coordinate apparatus in embodiment 1 or the measurement method of the three-coordinate apparatus in embodiment 2 when executing the computer program. The electronic device 70 shown in fig. 17 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention. As shown in fig. 17, the electronic device 70 may be embodied in the form of a general purpose computing device, which may be a server device, for example. Components of the electronic device 70 may include, but are not limited to: the at least one processor 71, the at least one memory 72, a bus 73 connecting the various system components, including the memory 72 and the processor 71.

Bus 73 includes a data bus, an address bus, and a control bus.

Memory 72 may include volatile memory such as Random Access Memory (RAM) 721 and/or cache memory 722, and may further include Read Only Memory (ROM) 723.

Memory 72 may also include a program tool 725 (or utility) having a set (at least one) of program modules 724, such program modules 724 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

The processor 71 executes various functional applications and data processing, such as the measurement information determining method of the three-coordinate instrument in the above-described embodiment 1 or the measurement method of the three-coordinate instrument in embodiment 2, by running the computer program stored in the memory 72.

The electronic device 70 may also communicate with one or more external devices 74. Such communication may occur through an input/output (I/O) interface 75. Also, model-generated electronic device 70 may also communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the Internet via network adapter 76. As shown in fig. 17, the network adapter 76 communicates with other modules of the electronic device 70 over the bus 73. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 70, including, but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, data backup storage systems, and the like.

It should be noted that although several units/modules or sub-units/modules of an electronic device are mentioned in the above detailed description, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more units/modules described above may be embodied in one unit/module in accordance with embodiments of the present invention. Conversely, the features and functions of one unit/module described above may be further divided into ones that are embodied by a plurality of units/modules.

Example 7

The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the measurement information determination method of the three-coordinate apparatus in embodiment 1 described above, or the measurement method of the three-coordinate apparatus in embodiment 2.

More specifically, among others, readable storage media may be employed including, but not limited to: portable disk, hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.

In a possible embodiment, the invention may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps of the method for determining measurement information for a three-coordinate instrument in the above-mentioned embodiment 1 or the method for measuring a three-coordinate instrument in the embodiment 2, when the program product is run on the terminal device.

Wherein the program code for carrying out the invention may be written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device, partly on a remote device or entirely on the remote device.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims

1. The utility model provides a measurement information determining method of three-dimensional instrument, characterized in that, software system in the three-dimensional instrument does not possess the modeling function of practicality, and the measurement information determining method includes:

2. The method according to claim 1, wherein the step of establishing a three-dimensional workpiece coordinate system of the workpiece to be measured based on the placement position and the clamping manner of the workpiece to be measured includes:

3. The metrology information determining method of claim 2, wherein the step of determining the origin of coordinates, the X-axis, and the Y-axis of the three-dimensional workpiece coordinate system based on the workpiece image to form a two-dimensional planar coordinate system comprises:

4. The method according to claim 2, wherein the step of performing a preset operation on the initial three-dimensional coordinate system to obtain the three-dimensional workpiece coordinate system comprises:

5. The measurement information determining method according to claim 1, wherein the step of determining the coordinate values of the measurement points corresponding to each of the measurement objects on the workpiece to be measured in the three-dimensional workpiece coordinate system includes:

6. The measurement information determining method according to claim 1, wherein the step of generating the travel path of the measurement probe in the three-dimensional instrument based on the coordinate values of the measurement point corresponding to each of the measurement objects in the three-dimensional machine coordinate system includes:

7. The method of claim 6, further comprising:

8. The measurement information determining method according to claim 1, wherein the measurement information determining method further comprises:

9. The method of claim 1, wherein the three-coordinate instrument comprises a Micro-Vu three-coordinate instrument, and the software system comprises a InSpec system;

and/or, the physical modeling comprises CAD modeling.

10. A method of measuring a three-dimensional instrument, the method comprising:

Acquiring a target measurement workpiece;

The measurement information determining method of the three-dimensional instrument according to any one of claims 1 to 9 is used for measuring the target measurement workpiece to obtain a measurement result of the target measurement workpiece.

11. The method of claim 10, further comprising;

12. A measurement information determination system of a three-coordinate instrument, the measurement information determination system comprising:

13. A measurement system for a three-dimensional instrument, the measurement system comprising:

A measurement module for measuring the target measurement workpiece using the measurement information determining system of the three-coordinate apparatus according to claim 12 to obtain a measurement result of the target measurement workpiece.

14. A three-dimensional instrument, characterized in that it comprises a measurement system of the three-dimensional instrument of claim 13.

15. An electronic device comprising a memory, a processor and a computer program stored on the memory for execution on the processor, characterized in that the processor implements the method for determining measurement information of a three-coordinate instrument according to any one of claims 1-9 or the method for measuring a three-coordinate instrument according to claim 10 or 11.

16. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the measurement information determination method of the three-coordinate instrument according to any one of claims 1 to 9, or the measurement method of the three-coordinate instrument according to claim 10 or 11.