CN112414340A - Three-coordinate measuring method, device and equipment of workpiece and storage medium - Google Patents
Three-coordinate measuring method, device and equipment of workpiece and storage medium Download PDFInfo
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- CN112414340A CN112414340A CN201910778205.5A CN201910778205A CN112414340A CN 112414340 A CN112414340 A CN 112414340A CN 201910778205 A CN201910778205 A CN 201910778205A CN 112414340 A CN112414340 A CN 112414340A
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Abstract
The embodiment of the invention discloses a three-coordinate measuring method, a three-coordinate measuring device, three-coordinate measuring equipment and a storage medium of a workpiece. The measuring method comprises the following steps: illuminating a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform; determining a conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates; acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation; and carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire the measurement parameters of the workpiece in the second coordinate system. The embodiment of the invention realizes the three-coordinate measurement automation of different workpieces.
Description
Technical Field
The present invention relates to measurement technologies, and in particular, to a method, an apparatus, a device, and a storage medium for measuring three coordinates of a workpiece.
Background
Three-coordinate inspection is a precision measurement method for inspecting workpieces. The method is widely applied to modern industries such as machine manufacturing industry, automobile industry and the like. A three-coordinate measuring machine is one of the most efficient methods of measuring and obtaining dimensional data because it can replace many surface measuring tools and expensive combination gauges and reduce the time required for complex measurement tasks from hours to minutes, an effect that other instruments cannot achieve.
In the three-coordinate automatic detection process, there are generally two methods for the automatic measurement of parts. One is to manually align the detected parts to make the parts and three coordinates in a unified coordinate system, and then to use automatic programming to complete the subsequent automatic measurement. And the other method is to position the part by a positioning tool so as to ensure that the part and the three-coordinate system are in a coordinate system, and then carry out automatic measurement.
The first method can well solve the detection of various parts, but the parts are manually aligned before each detection, and particularly, the method is time-consuming and labor-consuming for batch parts. Although the other method solves the problem of manual butt joint of parts, different parts need different positioning tools, and the universality of automatic detection is reduced.
Disclosure of Invention
The embodiment of the invention provides a method, a device and equipment for measuring three coordinates of a workpiece and a storage medium, which are used for realizing the automation of the three-coordinate measurement of different workpieces.
To achieve the object, embodiments of the present invention provide a method, an apparatus, a device and a storage medium for three-coordinate measuring of a workpiece, wherein the method for three-coordinate measuring of the workpiece comprises:
illuminating a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform; determining a conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates; acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation; and carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire the measurement parameters of the workpiece in the second coordinate system.
Preferably, the obtaining of the initial coordinates of the workpiece based on the measurement platform through the transformation relation includes:
placing a workpiece in the first preset area; illuminating the workpiece by the laser projection system based on the transformation relationship to obtain initial coordinates of the workpiece based on a second coordinate system of the measurement platform.
Further, obtaining the initial coordinates of the workpiece based on the measurement platform through the transformation relation comprises: importing a plurality of common measurement points into a data model of the workpiece; importing the data model into the laser projection system.
Further, the obtaining the initial coordinates of the workpiece based on the measurement platform through the transformation relation comprises:
obtaining placement coordinates of the workpiece based on a second coordinate system of the measuring platform based on the data model and the conversion relation; the laser projection system irradiates a second preset area in the first preset area according to the placement coordinate; and placing the workpiece in a second preset area in the first preset area.
In one aspect, an embodiment of the present invention further provides a three-coordinate measuring apparatus for a workpiece, where the apparatus includes:
the laser projection system is used for irradiating a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform, and the laser projection system is further used for determining a conversion relation of the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates to acquire initial coordinates of the workpiece based on the measuring platform;
and the measuring platform is used for carrying out three-coordinate measurement on the workpiece based on the initial coordinates so as to obtain the measurement parameters of the workpiece in the second coordinate system.
Preferably, the laser projection system is further configured to illuminate the workpiece through the laser projection system based on the transformation relation to obtain initial coordinates of the workpiece based on the measurement platform.
Further, the laser projection system is further configured to receive a data model of the workpiece, the data model including the plurality of common measurement points.
Further, the laser projection system is further configured to obtain an initial coordinate of the workpiece based on the measurement platform based on the data model and the transformation relation, and irradiate a second preset region in the first preset region according to the initial coordinate.
On the other hand, an embodiment of the present invention further provides an apparatus, where the apparatus includes:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a measurement method as provided in any of the embodiments above.
In still another aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the measurement method provided in any of the above embodiments.
The method comprises the steps of irradiating a plurality of common measuring points in a first preset area on a supporting plate of a measuring platform to obtain a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform; determining a conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates; acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation; and performing three-coordinate measurement on the workpiece based on the initial coordinate to obtain the measurement parameters of the workpiece in the second coordinate system, so that the problem that manual alignment is needed before three-coordinate measurement is used for different types of workpieces during initial positioning is solved, and the automatic effect of three-coordinate measurement of different types of workpieces is realized.
Drawings
FIG. 1 is a flowchart of a three-coordinate measuring method of a workpiece according to an embodiment of the present invention;
FIG. 2 is a flowchart of a three-coordinate measuring method of a workpiece according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a three-coordinate measuring method of a workpiece according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a three-coordinate measuring apparatus for a workpiece according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are for purposes of illustration and not limitation. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first speed difference may be referred to as a second speed difference, and similarly, a second speed difference may be referred to as a first speed difference, without departing from the scope of the present application. The first speed difference and the second speed difference are both speed differences, but they are not the same speed difference. The terms "first", "second", etc. are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Example one
As shown in fig. 1, an embodiment of the present invention provides a three-coordinate measuring method of a workpiece, including:
s101, irradiating a plurality of common measuring points in a first preset area on a supporting plate of a measuring platform to obtain a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform.
In this embodiment, the measurement platform is a three-coordinate measuring machine, and the support plate of the measurement platform is irradiated by the laser projection system. A first predetermined area may be predetermined on a support plate of the coordinate measuring machine, the area of the first predetermined area being smaller than the area of the support plate of the coordinate measuring machine. The first coordinate system may be a polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the common measurement points are polar coordinates, the second coordinate system may be a three-dimensional coordinate system of the workpiece to be measured relative to the three-coordinate measuring machine, and the second coordinates of the common measurement points are three-dimensional coordinates. The laser projection system irradiates the plurality of common measurement points of the first preset area to determine polar coordinates, namely first coordinates, of the plurality of common measurement points relative to the laser projection system, and the three-coordinate measuring machine measures the plurality of common measurement points of the first preset area to determine three-dimensional coordinates, namely second coordinates, of the plurality of common measurement points relative to the laser projection system.
And S102, determining the conversion relation between the first coordinate system and the second coordinate system according to the plurality of first coordinates and the plurality of second coordinates.
In this embodiment, the first coordinate system and the second coordinate system may be determined according to the first coordinate and the second coordinate of the plurality of common measurement pointsThe transformation relation of two coordinate systems. Specifically, the first common measurement point has a polar coordinate (ρ) in the first coordinate system relative to the laser projection system1，θ1) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)1，y1，z1) (ii) a The polar coordinate of the second common measurement point in the first coordinate system with respect to the laser projection system is (p)2，θ2) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)2，y2，z2) (ii) a The third common measurement point has a polar coordinate (p) in the first coordinate system with respect to the laser projection system3，θ3) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)3，y3，z3). By analogy, when enough common measurement points exist, the measurement relation between the current laser projection system placement position and the three-dimensional coordinate measuring machine placement position, namely the conversion relation between the first coordinate system and the second coordinate system, can be determined through the mutual conversion relation between the polar coordinate and the three-dimensional coordinate. The common measuring point in this embodiment may be a plurality of reference points arranged in a matrix on the support plate of the measuring platform.
S103, acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation.
In this embodiment, after the conversion relationship is determined, as long as the polar coordinate of the workpiece to be measured in the laser projection system is determined, the three-dimensional coordinate of the workpiece to be measured in the three-coordinate measuring machine can be determined through the conversion relationship, and the three-dimensional coordinate is determined as the initial coordinate.
And S104, carrying out three-coordinate measurement on the workpiece based on the initial coordinates to obtain the measurement parameters of the workpiece in the second coordinate system.
In this embodiment, after the initial coordinate of the workpiece to be measured on the three-coordinate measuring machine is determined, the initial coordinate data with the workpiece to be measured is imported into the upper computer of the three-coordinate measuring machine, and after the three-coordinate measuring machine knows the initial coordinate of the workpiece to be measured on the supporting plate, the measuring module of the three-coordinate measuring machine can automatically move according to the initial coordinate, complete the accurate positioning of the workpiece to be measured before measurement, and start to automatically measure the measurement parameters of the workpiece to be measured.
According to the three-coordinate measuring method of the workpiece provided by the embodiment of the invention, the problem that manual alignment is needed before three-coordinate measurement is used for different workpieces is solved by determining the coordinate conversion relation between the coordinate of the laser projection system and the coordinate of the three-coordinate measuring machine, and the automatic effect of three-coordinate measurement of different workpieces is realized.
Example two
As shown in fig. 2, a second embodiment of the present invention provides a three-coordinate measuring method for a workpiece, and the second embodiment of the present invention is optimized and improved based on the first embodiment of the present invention, and the three-coordinate measuring method for a workpiece includes:
s201, irradiating a plurality of common measuring points in a first preset area on a supporting plate of a measuring platform to obtain a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform.
In this embodiment, the measurement platform is a three-coordinate measuring machine, and the support plate of the measurement platform is irradiated by the laser projection system. A first predetermined area may be predetermined on a support plate of the coordinate measuring machine, the area of the first predetermined area being smaller than the area of the support plate of the coordinate measuring machine. The first coordinate system may be a polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the common measurement points are polar coordinates, the second coordinate system may be a three-dimensional coordinate system of the workpiece to be measured relative to the three-coordinate measuring machine, and the second coordinates of the common measurement points are three-dimensional coordinates. The laser projection system irradiates the plurality of common measurement points of the first preset area to determine polar coordinates, namely first coordinates, of the plurality of common measurement points relative to the laser projection system, and the three-coordinate measuring machine measures the plurality of common measurement points of the first preset area to determine three-dimensional coordinates, namely second coordinates, of the plurality of common measurement points relative to the laser projection system.
S202, determining the conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates.
In this embodiment, the conversion relationship between the first coordinate system and the second coordinate system may be determined according to the first coordinate and the second coordinate of the plurality of common measurement points. Specifically, the first common measurement point has a polar coordinate (ρ) in the first coordinate system relative to the laser projection system1，θ1) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)1，y1，z1) (ii) a The polar coordinate of the second common measurement point in the first coordinate system with respect to the laser projection system is (p)2，θ2) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)2，y2，z2) (ii) a The third common measurement point has a polar coordinate (p) in the first coordinate system with respect to the laser projection system3，θ3) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)3，y3，z3). By analogy, when enough common measurement points exist, the measurement relation between the current laser projection system placement position and the three-dimensional coordinate measuring machine placement position, namely the conversion relation between the first coordinate system and the second coordinate system, can be determined through the mutual conversion relation between the polar coordinate and the three-dimensional coordinate.
S203, placing the workpiece in the first preset area.
In this embodiment, the conversion relationship between the laser projection system and the three-coordinate measuring machine in the first preset area has been determined according to the common measurement point in the first preset area, and when the workpiece to be measured needs to be measured, the workpiece to be measured may be placed at any position in the first preset area.
And S204, irradiating the workpiece through the laser projection system based on the conversion relation to acquire initial coordinates of the workpiece based on a second coordinate system of the measuring platform.
In this embodiment, after the workpiece to be measured is placed at any position in the first preset area, the laser projection system irradiates the workpiece to be measured to obtain a polar coordinate of the workpiece to be measured in the first coordinate system relative to the laser projection system, and then a three-dimensional coordinate of the workpiece to be measured in the second coordinate system relative to the three-coordinate measuring machine can be obtained according to the conversion relationship, and the three-dimensional coordinate is determined as an initial coordinate.
And S205, carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire measurement parameters of the workpiece in the second coordinate system.
In this embodiment, after the initial coordinate of the workpiece to be measured on the three-coordinate measuring machine is determined, the initial coordinate data with the workpiece to be measured is imported into the upper computer of the three-coordinate measuring machine, and after the three-coordinate measuring machine knows the initial coordinate of the workpiece to be measured on the supporting plate, the measuring module of the three-coordinate measuring machine can automatically complete the accurate positioning of the workpiece to be measured before the measurement according to the initial coordinate and start to automatically measure the measurement parameters of the workpiece to be measured.
EXAMPLE III
As shown in fig. 3, a third embodiment of the present invention provides a three-coordinate measuring method of a workpiece, and the third embodiment of the present invention is an optimized and improved method based on the first embodiment of the present invention, and the three-coordinate measuring method of the workpiece includes:
s301, a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform are irradiated to obtain a plurality of first coordinates of the common measuring points based on a first coordinate system, and the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform.
In this embodiment, the measurement platform is a three-coordinate measuring machine, and the support plate of the measurement platform is irradiated by the laser projection system. A first predetermined area may be predetermined on a support plate of the coordinate measuring machine, the area of the first predetermined area being smaller than the area of the support plate of the coordinate measuring machine. The first coordinate system may be a polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the common measurement points are polar coordinates, the second coordinate system may be a three-dimensional coordinate system of the workpiece to be measured relative to the three-coordinate measuring machine, and the second coordinates of the common measurement points are three-dimensional coordinates. The laser projection system irradiates the plurality of common measurement points of the first preset area to determine polar coordinates, namely first coordinates, of the plurality of common measurement points relative to the laser projection system, and the three-coordinate measuring machine measures the plurality of common measurement points of the first preset area to determine three-dimensional coordinates, namely second coordinates, of the plurality of common measurement points relative to the laser projection system.
S302, determining the conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates.
In this embodiment, the conversion relationship between the first coordinate system and the second coordinate system may be determined according to the first coordinate and the second coordinate of the plurality of common measurement points. Specifically, the first common measurement point has a polar coordinate (ρ) in the first coordinate system relative to the laser projection system1，θ1) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)1，y1，z1) (ii) a The polar coordinate of the second common measurement point in the first coordinate system with respect to the laser projection system is (p)2，θ2) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)2，y2，z2) (ii) a The third common measurement point has a polar coordinate (p) in the first coordinate system with respect to the laser projection system3，θ3) In the second coordinate system, the three-dimensional coordinate relative to the three-dimensional coordinate measuring machine is (x)3，y3，z3). By analogy, when enough common measurement points exist, the measurement relation between the current laser projection system placement position and the three-dimensional coordinate measuring machine placement position, namely the conversion relation between the first coordinate system and the second coordinate system, can be determined through the mutual conversion relation between the polar coordinate and the three-dimensional coordinate.
And S303, importing the common measuring points into a data model of the workpiece.
In this embodiment, the data model of the workpiece to be measured is known, and the data model may be a data model of a plurality of different types of workpieces, and is stored in an upper computer of the three-coordinate measuring machine, and may introduce preset second coordinates of a plurality of common measurement points into the data model, and determine the relative positions of the coordinates of the data model of the workpiece to be measured and the second coordinates of the plurality of common measurement points.
And S304, importing the data model into the laser projection system.
In this embodiment, a data model including second coordinates of a plurality of common measurement points stored in an upper computer of the three-coordinate measuring machine is transmitted to the laser projection system through a communication module.
And S305, obtaining the placement coordinates of the workpiece based on the second coordinate system of the measuring platform based on the data model and the conversion relation.
In this embodiment, the data model of the second coordinate including the plurality of common measurement points has been converted into the placement coordinate represented by the first coordinate in the upper computer of the coordinate measuring machine according to the conversion relationship between the first coordinate system and the second coordinate system, the placement coordinate is generated based on the current position of the coordinate measuring machine in the second coordinate system, and the coordinate measuring machine can directly measure the workpiece to be measured when the workpiece to be measured is at the placement coordinate.
S306, the laser projection system irradiates a second preset area in the first preset area according to the placement coordinate.
In this embodiment, the area of the second predetermined area is smaller than that of the first predetermined area, and the second predetermined area is an area formed by placing coordinates, that is, when the workpiece to be measured is placed in the area, the three-coordinate measuring machine can directly measure the workpiece to be measured.
S307, placing the workpiece in a second preset area in the first preset area.
In this embodiment, the laser projection system irradiates the second preset area in the first preset area, and the workpiece to be measured and the boundary of the second preset area are aligned and placed according to the position of the second preset area.
And S308, carrying out three-coordinate measurement on the workpiece based on the initial coordinates to obtain the measurement parameters of the workpiece in the second coordinate system.
In this embodiment, after the workpiece to be measured is placed in the second preset area, since the second preset area is generated according to the current position of the three-coordinate measuring machine, the three-coordinate measuring machine does not need to change the position, and the measuring module of the three-coordinate measuring machine can directly and automatically complete the accurate positioning of the workpiece to be measured before the measurement, and start to automatically measure the measurement parameters of the workpiece to be measured.
Example four
As shown in fig. 4, a third embodiment of the present invention provides a three-coordinate measuring apparatus for a workpiece, which can perform the three-coordinate measuring method for a workpiece provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the performing method. The three-coordinate apparatus of the workpiece includes:
the laser projection system 300 is used for irradiating a plurality of common measurement points of a first preset area on a support plate of a measurement platform to acquire a plurality of first coordinates of the common measurement points based on a first coordinate system, the common measurement points have a plurality of second coordinates based on a second coordinate system of the measurement platform, and is further used for determining a conversion relation of the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates, and acquiring initial coordinates of the workpiece based on the measurement platform through the conversion relation;
and the measuring platform is used for carrying out three-coordinate measurement on the workpiece based on the initial coordinates so as to obtain the measurement parameters of the workpiece in the second coordinate system.
In one embodiment, the laser projection system 300 is further configured to illuminate the workpiece through the laser projection system 300 based on the transformation relationship to obtain initial coordinates of the workpiece based on the measurement platform.
Specifically, the measuring platform is a three-coordinate measuring machine 100, the three-coordinate measuring machine 100 comprises an upper computer 110, and the upper computer 110 is communicated with the laser projection system 300 through a communication module. Firstly, a plurality of preset common measurement points are led into the upper computer 110, the laser projection system 300 irradiates the common measurement points and then transmits acquired first coordinates to the upper computer 110 through the communication module 200, the upper computer 110 determines second coordinates of the common measurement points through the three-coordinate measuring machine 100, and then the conversion relation between a first coordinate system and a second coordinate system is determined according to the first coordinates and the second coordinates. The laser projection system 300 obtains a polar coordinate of a current placing position of the workpiece to be measured in a first preset area after irradiating the workpiece to be measured, the laser projection system 300 transmits the polar coordinate to the upper computer 110 through the communication module 200, the upper computer 110 converts the polar coordinate of the current placing position of the workpiece to be measured in the first preset area based on a first coordinate system into a three-dimensional coordinate based on a second coordinate system through a conversion relation, determines the position of the current workpiece to be measured in the second coordinate system, generates an automatic measurement code according to the three-dimensional coordinate, and controls the measurement module 120 of the three-coordinate measuring machine 100 to directly align and measure according to the position of the current workpiece to be measured in the second coordinate system.
In yet another embodiment, the laser projection system 300 is configured to receive a data model of the workpiece, the data model including the plurality of common measurement points. The laser projection system 300 is further configured to pass through the data model and the transformation relation to obtain initial coordinates of the workpiece based on the measurement platform, and irradiate a second preset region in the first preset region according to the initial coordinates.
Specifically, the measuring platform is a three-coordinate measuring machine 100, the three-coordinate measuring machine 100 comprises an upper computer 110, and the upper computer 110 is communicated with the laser projection system 300 through a communication module. Firstly, a plurality of preset common measurement points are led into the upper computer 110, the laser projection system 300 irradiates the common measurement points and then transmits acquired first coordinates to the upper computer 110 through the communication module 200, the upper computer 110 determines second coordinates of the common measurement points through the three-coordinate measuring machine 100, and then the conversion relation between a first coordinate system and a second coordinate system is determined according to the first coordinates and the second coordinates. The data model of the workpiece to be measured is known, and the data model may be a data model of a plurality of different types of workpieces, and is stored in the upper computer 110 of the three-coordinate measuring machine 100, the preset second coordinates of the plurality of common measuring points are imported into the data model, and the relative positions of the coordinates of the data model of the workpiece to be measured and the second coordinates of the plurality of common measuring points are determined by the upper computer 110. And then transmits the data model including the second coordinates of the plurality of common measuring points stored in the upper computer 110 of the three-coordinate measuring machine 100 to the laser projection system 300 through the communication module 200. The data model of the second coordinate including the plurality of common measurement points has been converted into the placement coordinate expressed by the first coordinate in the upper computer 110 of the three-coordinate measuring machine 100 according to the conversion relationship of the first coordinate system and the second coordinate system, the placement coordinate being generated based on the current position of the three-coordinate measuring machine 100 in the second coordinate system, and the three-coordinate measuring machine 100 can directly measure the workpiece to be measured when the workpiece to be measured is at the placement coordinate. The area of the second predetermined area is smaller than that of the first predetermined area, and the second predetermined area is an area formed by placing coordinates, that is, when a workpiece to be measured is placed in the area, the three-coordinate measuring machine 100 can directly measure the workpiece to be measured. The laser projection system 300 irradiates a second preset area in the first preset area, and the workpiece to be measured and the boundary of the second preset area are aligned and placed according to the position of the second preset area. After the workpiece to be measured is placed in the second preset area, since the second preset area is generated according to the current position of the three-coordinate measuring machine 100, the three-coordinate measuring machine 100 does not need to change the position, and the measuring module 120 of the three-coordinate measuring machine 100 can directly and automatically complete the precise positioning before the measurement of the workpiece to be measured and start to automatically measure the measurement parameters of the workpiece to be measured.
EXAMPLE five
Fig. 5 is a schematic structural diagram of an apparatus according to a fifth embodiment of the present invention. FIG. 5 illustrates a block diagram of an exemplary computer system/server 12 suitable for use in implementing embodiments of the present invention. The computer system/server 12 shown in FIG. 5 is only one example and should not be taken to limit the scope of use or functionality of embodiments of the present invention.
As shown in FIG. 5, computer system/server 12 is in the form of a general purpose computing device. The components of computer system/server 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
Computer system/server 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by computer system/server 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. The computer system/server 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 5, and commonly referred to as a "hard drive"). Although not shown in FIG. 4, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
The computer system/server 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with the computer system/server 12, and/or with any devices (e.g., network card, modem, etc.) that enable the computer system/server 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, the computer system/server 12 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet) via the network adapter 20. As shown, network adapter 20 communicates with the other modules of computer system/server 12 via bus 18. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the computer system/server 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processing unit 16 executes various functional applications and data processing by executing programs stored in the system memory 28, for example, to implement the three-coordinate measuring method of the workpiece provided by the embodiment of the present invention:
a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform are irradiated to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, and the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform.
And determining the conversion relation of the first coordinate system and the second coordinate system according to the plurality of first coordinates and the plurality of second coordinates.
And acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation.
And carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire the measurement parameters of the workpiece in the second coordinate system.
EXAMPLE six
The sixth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the three-coordinate measuring method for a workpiece according to all the embodiments of the present invention:
a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform are irradiated to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, and the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform.
And determining the conversion relation of the first coordinate system and the second coordinate system according to the plurality of first coordinates and the plurality of second coordinates.
And acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation.
And carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire the measurement parameters of the workpiece in the second coordinate system.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A method of three-coordinate measurement of a workpiece, comprising:
illuminating a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, wherein the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform;
determining a conversion relation between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates;
acquiring initial coordinates of the workpiece based on a second coordinate system of the measuring platform through the conversion relation;
and carrying out three-coordinate measurement on the workpiece based on the initial coordinates to acquire the measurement parameters of the workpiece in the second coordinate system.
2. The measurement method of claim 1, wherein the obtaining initial coordinates of the workpiece based on the measurement platform through the transformation relationship comprises:
placing a workpiece in the first preset area;
illuminating the workpiece by a laser projection system based on the transformation relationship to obtain initial coordinates of the workpiece based on a second coordinate system of the measurement platform.
3. The method of claim 1, wherein said passing through said transformation relationship to obtain initial coordinates of said workpiece based on said metrology stage comprises:
importing the plurality of common measurement points into a data model of the workpiece;
importing the data model into the laser projection system.
4. The measurement method of claim 3, wherein said obtaining initial coordinates of the workpiece based on the measurement platform by the transformation relationship comprises:
obtaining placement coordinates of the workpiece based on a second coordinate system of the measuring platform based on the data model and the conversion relation;
the laser projection system irradiates a second preset area in the first preset area according to the placement coordinate;
and placing the workpiece in a second preset area in the first preset area.
5. A three-coordinate measuring apparatus for a workpiece, comprising:
the laser projection system is used for irradiating a plurality of common measuring points of a first preset area on a supporting plate of a measuring platform to acquire a plurality of first coordinates of the common measuring points based on a first coordinate system, the common measuring points have a plurality of second coordinates based on a second coordinate system of the measuring platform, and the laser projection system is further used for determining a conversion relation of the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates to acquire initial coordinates of the workpiece based on the measuring platform;
and the measuring platform is used for carrying out three-coordinate measurement on the workpiece based on the initial coordinates so as to obtain the measurement parameters of the workpiece in the second coordinate system.
6. The measurement apparatus of claim 5, wherein the laser projection system is further configured to illuminate the workpiece through the laser projection system based on the transformed relationship to obtain initial coordinates of the workpiece based on the measurement platform.
7. The measurement device of claim 5, wherein the laser projection system is further configured to receive a data model of the workpiece, the data model including the plurality of common measurement points.
8. The measurement apparatus of claim 7, wherein the laser projection system is further configured to pass through the data model and transformation relationship to obtain initial coordinates of the workpiece based on the measurement platform, and illuminate a second predetermined area in the first predetermined area according to the initial coordinates.
9. An apparatus, characterized in that the apparatus comprises:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the measurement method of any one of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the measurement method according to any one of claims 1 to 4.
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| CN112414340B (en) | 2022-04-08 |
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