CN112414340B - Three-coordinate measuring method, device and equipment of workpiece and storage medium - Google Patents

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

A three-coordinate measuring method, device, equipment and storage medium for workpiece

technical field

The embodiments of the present invention relate to measurement technology, and in particular, to a method, device, equipment and storage medium for measuring three coordinates of a workpiece.

Background technique

Three-coordinate detection is a precise measurement method for inspecting workpieces. Widely used in machinery manufacturing, automobile industry and other modern industries. CMM is one of the most effective ways to measure and obtain dimensional data, because it can replace a variety of surface measurement tools and expensive combination gauges, and reduce the time required for complex measurement tasks from hours to minutes. effect that cannot be achieved by other instruments.

In the process of automatic three-coordinate detection, there are usually two methods for automatic measurement of parts. One is to manually align the detected parts so that the parts and the three coordinates are in a unified coordinate system, and then use automated programming to complete subsequent automated measurements. The other is to position the part through the positioning tool to ensure that the part and the three coordinates are in a coordinate system, and then perform automatic measurement.

The first method can solve the inspection of various parts very well, but manual alignment is required before each inspection, especially for batch parts, which is time-consuming and labor-intensive. Although the other method solves the problem of manual docking of parts, different parts need to use different positioning tooling, which reduces the versatility of automatic detection.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a three-coordinate measurement method, device, device, and storage medium for workpieces, so as to realize automation of three-coordinate measurement of different types of workpieces.

For this purpose, the embodiment of the present invention provides a three-coordinate measurement method, device, equipment and storage medium for a workpiece, and the three-coordinate measurement method for the workpiece includes:

Irradiate a plurality of common measurement points in the first preset area on the support plate of the measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on the first coordinate system, and the plurality of common measurement points are based on the The second coordinate system of the measuring platform has a plurality of second coordinates; the conversion relationship between the first coordinate system and the second coordinate system is determined according to the plurality of first coordinates and the plurality of second coordinates; and the conversion relationship is obtained through the conversion relationship The workpiece is based on the initial coordinates of the second coordinate system of the measuring platform; based on the initial coordinates, three-coordinate measurement of the workpiece is performed to obtain measurement parameters of the workpiece in the second coordinate system.

Preferably, obtaining the initial coordinates of the workpiece based on the measurement platform through the conversion relationship includes:

placing the workpiece in the first preset area; irradiating the workpiece through the laser projection system based on the conversion relationship to obtain initial coordinates of the workpiece based on the second coordinate system of the measuring platform.

Further, obtaining the initial coordinates of the workpiece based on the measurement platform through the conversion relationship includes: importing a plurality of common measurement points into the data model of the workpiece; importing the data model into the laser projection system.

Further, obtaining the initial coordinates of the workpiece based on the measurement platform through the conversion relationship includes:

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 relationship; the laser projection system irradiates a second preset area in the first preset area according to the placement coordinates setting an area; placing the workpiece in a second preset area in the first preset area.

On the one hand, an embodiment of the present invention also provides a three-coordinate measuring device for a workpiece, the device comprising:

The laser projection system is used to illuminate a plurality of common measurement points in the first preset area on the support plate of the measurement platform, so as to obtain a plurality of first coordinates of the plurality of common measurement points based on the first coordinate system, the plurality of The common measurement point has a plurality of second coordinates based on the second coordinate system of the measurement platform, and is further configured to determine the distance between the first coordinate system and the second coordinate system according to the plurality of first coordinates and the plurality of second coordinates a conversion relationship, through which the initial coordinates of the workpiece based on the measurement platform are obtained;

The measurement platform performs three-coordinate measurement on the workpiece based on the initial coordinates, so as to obtain measurement parameters of the workpiece in the second coordinate system.

Preferably, the laser projection system is further configured to irradiate the workpiece through the laser projection system based on the conversion relationship to obtain the 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, and the data model includes the plurality of common measurement points.

Further, the laser projection system is also used to obtain the initial coordinates of the workpiece based on the measurement platform based on the data model and the conversion relationship, and to irradiate the first preset area according to the initial coordinates. Two preset areas.

On the other hand, an embodiment of the present invention also provides a device, and the device includes:

one or more processors;

storage means for storing one or more programs,

When the one or more programs are executed by the one or more processors, the one or more processors implement the measurement method provided by any of the above embodiments.

In another aspect, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the measurement method provided in any of the foregoing embodiments.

In this embodiment of the present invention, multiple common measurement points in the first preset area on the support plate of the measurement platform are irradiated to obtain multiple first coordinates of the multiple common measurement points based on the first coordinate system, and the multiple common measurement points are based on the first coordinate system. The measurement point has a plurality of second coordinates based on the second coordinate system of the measurement platform; the conversion relationship between the first coordinate system and the second coordinate system is determined according to the plurality of first coordinates and the plurality of second coordinates; The conversion relationship obtains the initial coordinates of the workpiece based on the second coordinate system of the measuring platform; based on the initial coordinates, three-coordinate measurement is performed on the workpiece to obtain the measurement of the workpiece in the second coordinate system parameters, which solves the problem of manual alignment during initial positioning before using three-coordinate measurement for different kinds of workpieces, and realizes the automatic effect of three-coordinate measurement for different kinds of workpieces.

Description of drawings

1 is a flowchart of a three-coordinate measurement method for a workpiece provided in Embodiment 1 of the present invention;

2 is a flowchart of a three-coordinate measurement method for a workpiece provided in Embodiment 2 of the present invention;

3 is a flowchart of a three-coordinate measurement method for a workpiece provided in Embodiment 3 of the present invention;

4 is a schematic structural diagram of a three-coordinate measuring device for a workpiece according to Embodiment 4 of the present invention;

FIG. 5 is a schematic structural diagram of a device according to Embodiment 5 of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

Furthermore, the terms "first," "second," etc. may be used herein to describe various directions, acts, steps or elements, etc., but are not limited by these terms. These terms are only used to distinguish a first direction, act, step or element from another direction, act, 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 this application. Both the first speed difference and the second speed difference are speed differences, but they are not the same speed difference. The terms "first", "second", etc. should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more of said features. In the description of the embodiments of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

Example 1

As shown in FIG. 1, Embodiment 1 of the present invention provides a three-coordinate measurement method for a workpiece, and the three-coordinate measurement method for the workpiece includes:

S101. Irradiate a plurality of common measurement points in a first preset area on a support plate of a measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on a first coordinate system, and the plurality of common measurement points are based on The second coordinate system of the measurement platform has a plurality of second coordinates.

In this embodiment, the measuring platform is a three-coordinate measuring machine, and the support plate of the measuring platform is irradiated by a laser projection system. A first preset area can be preset on the support plate of the CMM, and the area of the first preset area is smaller than the area of the support plate of the CMM. A plurality of common measurement points are preset in the first preset area, the first coordinate system may be the polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the plurality of common measurement points are polar coordinates, and the second coordinate system may be polar coordinates. The 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 plurality of common measurement points are three-dimensional coordinates. The laser projection system illuminates multiple common measurement points in the first preset area to determine the polar coordinates of the multiple common measurement points relative to itself, that is, the first coordinates, and the three-coordinate measuring machine measures multiple common measurements in the first preset area. point to determine the three-dimensional coordinates of a plurality of common measurement points relative to itself, that is, the second coordinates.

S102. Determine the conversion relationship 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 conversion relationship between the first coordinate system and the second coordinate system may be determined according to the first coordinates and the second coordinates of the plurality of common measurement points. Specifically, the polar coordinates of the first common measurement point relative to the laser projection system in the first coordinate system are (ρ ₁ , θ ₁ ), and the three-dimensional coordinates relative to the CMM in the second coordinate system are (x ₁ , y ₁ , z ₁ ); the polar coordinates of the second common measurement point relative to the laser projection system in the first coordinate system are (ρ ₂ , θ ₂ ), and relative to the CMM in the second coordinate system The three-dimensional coordinates are (x ₂ , y ₂ , z ₂ ); the polar coordinates of the third common measurement point relative to the laser projection system in the first coordinate system are (ρ ₃ , θ ₃ ), and in the second coordinate system The three-dimensional coordinates relative to the CMM are (x ₃ , y ₃ , z ₃ ). By analogy, when there are enough public measurement points, the measurement between the current position of the laser projection system and the position of the CMM can be determined through the mutual conversion relationship between polar coordinates and three-dimensional coordinates. relationship, that is, the conversion relationship between the first coordinate system and the second coordinate system. In this embodiment, the common measurement point may be a plurality of reference points arranged in a matrix on the support plate of the measurement platform.

S103. Obtain the initial coordinates of the workpiece based on the second coordinate system of the measuring platform through the conversion relationship.

In this embodiment, after the conversion relationship is determined, as long as the polar coordinates of the workpiece to be tested in the laser projection system are determined, the three-dimensional coordinates of the workpiece to be tested in the CMM can be determined through the conversion relationship, and the three-dimensional coordinates are determined as the initial coordinates .

S104. Perform three-coordinate measurement on the workpiece based on the initial coordinates to obtain measurement parameters of the workpiece in the second coordinate system.

In this embodiment, after determining the initial coordinates of the workpiece to be measured on the CMM, import the initial coordinate data with the workpiece to be measured into the host computer of the CMM, when the CMM knows that the workpiece to be measured is in its After the initial coordinates on the support plate, the measurement module of the CMM can automatically move according to the initial coordinates, complete the precise positioning of the workpiece to be measured before measurement, and start to automatically measure the measurement parameters of the workpiece to be measured.

The first embodiment of the present invention provides a three-coordinate measurement method for a workpiece. By determining the coordinate conversion relationship between the coordinates of the laser projection system and the three-coordinate measuring machine, it solves the need for manual alignment when initial positioning is used for different kinds of workpieces before using three-coordinate measurement. It realizes the automatic effect of the three-coordinate measurement of different workpieces.

Embodiment 2

As shown in FIG. 2 , the second embodiment of the present invention provides a three-coordinate measurement method for a workpiece. The second embodiment of the present invention is based on the solution of the first embodiment of the present invention, and has been optimized and improved. The three-coordinate measurement of the workpiece is Methods include:

S201. Irradiate a plurality of common measurement points in a first preset area on a support plate of a measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on a first coordinate system, and the plurality of common measurement points are based on The second coordinate system of the measurement platform has a plurality of second coordinates.

In this embodiment, the measuring platform is a three-coordinate measuring machine, and the support plate of the measuring platform is irradiated by a laser projection system. A first preset area can be preset on the support plate of the CMM, and the area of the first preset area is smaller than the area of the support plate of the CMM. A plurality of common measurement points are preset in the first preset area, the first coordinate system may be the polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the plurality of common measurement points are polar coordinates, and the second coordinate system may be polar coordinates. The 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 plurality of common measurement points are three-dimensional coordinates. The laser projection system illuminates multiple common measurement points in the first preset area to determine the polar coordinates of the multiple common measurement points relative to itself, that is, the first coordinates, and the three-coordinate measuring machine measures multiple common measurements in the first preset area. point to determine the three-dimensional coordinates of a plurality of common measurement points relative to itself, that is, the second coordinates.

S202. Determine the conversion relationship 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 conversion relationship between the first coordinate system and the second coordinate system may be determined according to the first coordinates and the second coordinates of the plurality of common measurement points. Specifically, the polar coordinates of the first common measurement point relative to the laser projection system in the first coordinate system are (ρ ₁ , θ ₁ ), and the three-dimensional coordinates relative to the CMM in the second coordinate system are (x ₁ , y ₁ , z ₁ ); the polar coordinates of the second common measurement point relative to the laser projection system in the first coordinate system are (ρ ₂ , θ ₂ ), and relative to the CMM in the second coordinate system The three-dimensional coordinates are (x ₂ , y ₂ , z ₂ ); the polar coordinates of the third common measurement point relative to the laser projection system in the first coordinate system are (ρ ₃ , θ ₃ ), and in the second coordinate system The three-dimensional coordinates relative to the CMM are (x ₃ , y ₃ , z ₃ ). By analogy, when there are enough public measurement points, the measurement between the current position of the laser projection system and the position of the CMM can be determined through the mutual conversion relationship between polar coordinates and three-dimensional coordinates. relationship, that is, the conversion relationship between the first coordinate system and the second coordinate system.

S203, placing the workpiece in the first preset area.

In this embodiment, the conversion relationship between the laser projection system and the CMM in the first preset area has been determined according to the common measurement points in the first preset area. When the workpiece to be measured needs to be measured, the The workpiece is placed at any position in the first preset area.

S204 , irradiating the workpiece through the laser projection system based on the conversion relationship to obtain the initial coordinates of the workpiece based on the second coordinate system of the measuring platform.

In this embodiment, after the workpiece to be tested is placed at any position in the first preset area, the laser projection system illuminates the workpiece to be tested to obtain the polar coordinates of the workpiece to be tested relative to the first coordinate system of the laser projection system , and then the three-dimensional coordinates of the workpiece to be measured relative to the three-coordinate measuring machine in the second coordinate system can be obtained according to the conversion relationship, and the three-dimensional coordinates are determined as the initial coordinates.

S205. Perform three-coordinate measurement on the workpiece based on the initial coordinates to obtain measurement parameters of the workpiece in the second coordinate system.

In this embodiment, after determining the initial coordinates of the workpiece to be measured on the CMM, import the initial coordinate data with the workpiece to be measured into the host computer of the CMM, when the CMM knows that the workpiece to be measured is in its After the initial coordinates on the support plate, the measurement module of the CMM can automatically complete the precise positioning of the workpiece to be measured according to the initial coordinates, and start to automatically measure the measurement parameters of the workpiece to be measured.

Embodiment 3

As shown in FIG. 3 , the third embodiment of the present invention provides a three-coordinate measurement method for a workpiece. The third embodiment of the present invention is based on the solution of the first embodiment of the present invention, and has been optimized and improved. The three-coordinate measurement of the workpiece is Methods include:

S301. Irradiate a plurality of common measurement points in a first preset area on a support plate of a measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on a first coordinate system, and the plurality of common measurement points are based on The second coordinate system of the measurement platform has a plurality of second coordinates.

In this embodiment, the measuring platform is a three-coordinate measuring machine, and the support plate of the measuring platform is irradiated by a laser projection system. A first preset area can be preset on the support plate of the CMM, and the area of the first preset area is smaller than the area of the support plate of the CMM. A plurality of common measurement points are preset in the first preset area, the first coordinate system may be the polar coordinate system of the workpiece to be measured relative to the laser projection system, the first coordinates of the plurality of common measurement points are polar coordinates, and the second coordinate system may be polar coordinates. The 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 plurality of common measurement points are three-dimensional coordinates. The laser projection system illuminates multiple common measurement points in the first preset area to determine the polar coordinates of the multiple common measurement points relative to itself, that is, the first coordinates, and the three-coordinate measuring machine measures multiple common measurements in the first preset area. point to determine the three-dimensional coordinates of a plurality of common measurement points relative to itself, that is, the second coordinates.

S302. Determine the conversion relationship 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 conversion relationship between the first coordinate system and the second coordinate system may be determined according to the first coordinates and the second coordinates of the plurality of common measurement points. Specifically, the polar coordinates of the first common measurement point relative to the laser projection system in the first coordinate system are (ρ ₁ , θ ₁ ), and the three-dimensional coordinates relative to the CMM in the second coordinate system are (x ₁ , y ₁ , z ₁ ); the polar coordinates of the second common measurement point relative to the laser projection system in the first coordinate system are (ρ ₂ , θ ₂ ), and relative to the CMM in the second coordinate system The three-dimensional coordinates are (x ₂ , y ₂ , z ₂ ); the polar coordinates of the third common measurement point relative to the laser projection system in the first coordinate system are (ρ ₃ , θ ₃ ), and in the second coordinate system The three-dimensional coordinates relative to the CMM are (x ₃ , y ₃ , z ₃ ). By analogy, when there are enough public measurement points, the measurement between the current position of the laser projection system and the position of the CMM can be determined through the mutual conversion relationship between polar coordinates and three-dimensional coordinates. relationship, that is, the conversion relationship between the first coordinate system and the second coordinate system.

S303. Import the multiple common measurement points into the data model of the workpiece.

In this embodiment, the data model of the workpiece to be measured is known, and the data model can be a data model of a plurality of different types of workpieces, and is stored in the upper computer of the three-coordinate measuring machine. The second coordinates of the common measuring points are imported into the data model to 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 measuring points.

S304. Import the data model into the laser projection system.

In this embodiment, a data model including the second coordinates of a plurality of common measurement points stored in the host computer of the three-coordinate measuring machine is transmitted to the laser projection system through a communication module.

S305 , based on the data model and the conversion relationship, obtain the placement coordinates of the workpiece based on the second coordinate system of the measuring platform.

In this embodiment, in the upper computer of the CMM, the data model including the second coordinates of a plurality of common measurement points has been converted into a data model represented by the first coordinates according to the conversion relationship between the first coordinate system and the second coordinate system Placement coordinates. The placement coordinates are generated based on the current position of the CMM in the second coordinate system. When the workpiece to be measured is at the placement coordinates, the CMM can directly measure the workpiece to be tested.

S306, the laser projection system illuminates a second preset area in the first preset area according to the placement coordinates.

In this embodiment, the area of the second preset area is smaller than that of the first preset area, and the second preset area is an area formed by placing coordinates, that is, when the workpiece to be measured is placed in this area, the CMM can directly measure the workpiece to be tested.

S307. Place 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 only needs to manually align the workpiece to be tested with the boundary of the second preset area according to the position of the second preset area. Can.

S308. Perform three-coordinate measurement on the workpiece based on the initial coordinates to obtain 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 CMM, the CMM does not need to change the position, and the CMM does not need to change the position. The measurement module can directly and automatically start to complete the precise positioning of the workpiece to be measured before measurement, and start to automatically measure the measurement parameters of the workpiece to be measured.

Embodiment 4

As shown in FIG. 4 , Embodiment 4 of the present invention provides a three-coordinate measuring device for a workpiece. The three-coordinate measuring device for a workpiece can execute the three-coordinate measuring method for a workpiece provided by any embodiment of the present invention, and has the corresponding method for executing the method. functional modules and beneficial effects. The three-coordinate device of the workpiece includes:

The laser projection system 300 is used to illuminate a plurality of common measurement points in a first preset area on a support plate of a measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on a first coordinate system, and the plurality of common measurement points are based on a first coordinate system. The common measurement points have multiple second coordinates based on the second coordinate system of the measuring platform, and are further configured to determine the first coordinate system and the second coordinate system according to the multiple first coordinates and the multiple second coordinates The conversion relationship, through the conversion relationship to obtain the initial coordinates of the workpiece based on the measurement platform;

The measurement platform performs three-coordinate measurement on the workpiece based on the initial coordinates, so as to obtain measurement parameters of the workpiece in the second coordinate system.

In one embodiment, the laser projection system 300 is further configured to irradiate the workpiece through the laser projection system 300 based on the conversion relationship to obtain the initial coordinates of the workpiece based on the measurement platform.

Specifically, the measurement platform is a three-coordinate measuring machine 100, and the three-coordinate measuring machine 100 includes an upper computer 110, and the upper computer 110 communicates with the laser projection system 300 through a communication module. First, a plurality of preset public measuring points are imported into the host computer 110. After the laser projection system 300 illuminates the plurality of public measuring points, the acquired first coordinates are transmitted to the host computer 110 through the communication module 200, and the host computer 110 measures the three coordinates. The machine 100 determines the second coordinates of the plurality of common measurement points, and then determines the conversion relationship between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates. After irradiating the workpiece to be tested, the laser projection system 300 obtains the polar coordinates of the current position of the workpiece to be tested in the first preset area. The laser projection system 300 transmits the polar coordinates to the host computer 110 through the communication module 200, and the host computer 110 passes the polar coordinates. The conversion relationship converts the polar coordinates based on the first coordinate system of the current position of the workpiece to be tested in the first preset area into three-dimensional coordinates based on the second coordinate system, and determines the current position of the workpiece to be tested in the second coordinate system. , and generate an automatic measurement code according to the three-dimensional coordinates, and control the measurement module 120 of the three-coordinate measuring machine 100 to directly align and measure according to the current position of the 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, and the data model includes the plurality of common measurement points. The laser projection system 300 is further configured to obtain the initial coordinates of the workpiece based on the measurement platform based on the data model and the conversion relationship, and irradiate the second preset area in the first preset area according to the initial coordinates. set area.

Specifically, the measurement platform is a three-coordinate measuring machine 100, and the three-coordinate measuring machine 100 includes an upper computer 110, and the upper computer 110 communicates with the laser projection system 300 through a communication module. First, a plurality of preset public measuring points are imported into the host computer 110. After the laser projection system 300 illuminates the plurality of public measuring points, the acquired first coordinates are transmitted to the host computer 110 through the communication module 200, and the host computer 110 measures the three coordinates. The machine 100 determines the second coordinates of the plurality of common measurement points, and then determines the conversion relationship between the first coordinate system and the second coordinate system according to the first coordinates and the second coordinates. The data model of the workpiece to be measured is known, and the data model can be a data model of a plurality of different types of workpieces, and is stored in the upper computer 110 of the CMM 100. The second coordinates are imported into the data model, and the host computer 110 determines the coordinates of the data model of the workpiece to be measured and the relative positions of the second coordinates of the plurality of common measurement points. Then, the data model including the second coordinates of the plurality of common measurement points stored in the host computer 110 of the CMM 100 is transmitted to the laser projection system 300 through the communication module 200 . In the host computer 110 of the coordinate measuring machine 100, the data model including the second coordinates of the plurality of common measurement points has been converted into the placement coordinates represented by the first coordinates according to the conversion relationship between the first coordinate system and the second coordinate system, The placement coordinates are generated based on the current position of the CMM 100 in the second coordinate system. When the workpiece to be measured is at the placement coordinates, the CMM 100 can directly measure the workpiece to be tested. The area of the second preset area is smaller than that of the first preset area, and the second preset area is an area formed by placing coordinates, that is, when the workpiece to be measured is placed in this area, the CMM 100 can directly measure the workpiece to be measured . The laser projection system 300 illuminates the second preset area in the first preset area, and only needs to manually align the workpiece to be tested with the boundary of the second preset area 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 CMM 100, the CMM 100 does not need to change the position, the CMM 100 does not need to change the position. The module 120 can directly and automatically start to complete the precise positioning of the workpiece to be measured before measurement, and start to automatically measure the measurement parameters of the workpiece to be measured.

Embodiment 5

FIG. 5 is a schematic structural diagram of a device according to Embodiment 5 of the present invention. Figure 5 shows 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 an example, and should not impose any limitation on the functions and scope of use of the embodiments of the present invention.

As shown in FIG. 5, computer system/server 12 takes the form of a general-purpose computing device. Components of computer system/server 12 may include, but are not limited to, one or more processors or processing units 16, system memory 28, and a bus 18 connecting various system components including system memory 28 and processing unit 16.

Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of a variety of bus structures. By way of example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect ( PCI) bus.

Computer system/server 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by computer system/server 12, including both volatile and non-volatile media, removable and non-removable media.

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 . Computer system/server 12 may further include other removable/non-removable, volatile/non-volatile computer system storage media. For example only, storage system 34 may be used to read and write to non-removable, non-volatile magnetic media (not shown in FIG. 5, commonly referred to as a "hard disk drive"). Although not shown in Figure 4, a disk drive may be provided for reading and writing to removable non-volatile magnetic disks (eg "floppy disks"), as well as removable non-volatile optical disks (eg CD-ROM, DVD-ROM) or other optical media) to read and write optical drives. In these cases, each drive may be connected to bus 18 through one or more data media interfaces. Memory 28 may include at least one program product having a set (eg, at least one) of program modules configured to perform the functions of various embodiments of the present invention.

A program/utility 40 having a set (at least one) of program modules 42, which 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 programs Modules and program data, each or some combination of these examples may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods of the described embodiments of the present invention.

The computer system/server 12 may also communicate with one or more external devices 14 (eg, keyboard, pointing device, display 24, etc.), and may also communicate with one or more devices that enable a user to interact with the computer system/server 12, and/or with any device (eg, network card, modem, etc.) that enables the computer system/server 12 to communicate with one or more other computing devices. Such communication may take place through input/output (I/O) interface 22 . Also, the computer system/server 12 may communicate with one or more networks (eg, a local area network (LAN), a wide area network (WAN), and/or a public network such as the Internet) through a network adapter 20 . As shown, network adapter 20 communicates with other modules of computer system/server 12 via bus 18 . It should be understood that, although not shown, other hardware and/or software modules may be used in conjunction with 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, etc.

The processing unit 16 executes various functional applications and data processing by running the program stored in the system memory 28, for example, realizes the three-coordinate measurement method of the workpiece provided by the embodiment of the present invention:

Irradiate a plurality of common measurement points in the first preset area on the support plate of the measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on the first coordinate system, and the plurality of common measurement points are based on the The second coordinate system of the measurement platform has a plurality of second coordinates.

The conversion relationship between the first coordinate system and the second coordinate system is determined according to the plurality of first coordinates and the plurality of second coordinates.

The initial coordinates of the workpiece based on the second coordinate system of the measuring platform are obtained through the conversion relationship.

Three-coordinate measurement is performed on the workpiece based on the initial coordinates to obtain measurement parameters of the workpiece in the second coordinate system.

Embodiment 6

The sixth embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by the processor, realizes the three-coordinate measurement method of the workpiece provided by all the inventive embodiments of the present application:

Irradiate a plurality of common measurement points in the first preset area on the support plate of the measurement platform to obtain a plurality of first coordinates of the plurality of common measurement points based on the first coordinate system, and the plurality of common measurement points are based on the The second coordinate system of the measurement platform has a plurality of second coordinates.

The conversion relationship between the first coordinate system and the second coordinate system is determined according to the plurality of first coordinates and the plurality of second coordinates.

The initial coordinates of the workpiece based on the second coordinate system of the measuring platform are obtained through the conversion relationship.

Three-coordinate measurement is performed on the workpiece based on the initial coordinates to obtain measurement parameters of the workpiece in the second coordinate system.

The computer storage medium in the embodiments of the present invention may adopt any combination of one or more computer-readable mediums. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (a non-exhaustive list) of computer readable storage media include: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), Erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a propagated data signal in baseband or as part of a carrier wave, with computer-readable program code embodied thereon. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device .

Program code embodied on a computer readable medium may be transmitted using any suitable 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 of the present invention may be written in one or more programming languages, including object-oriented programming languages—such as Java, Smalltalk, C++, but also conventional Procedural programming language - such as the "C" language or similar programming language. 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 kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (eg, using an Internet service provider through Internet connection).

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (6)

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;

performing three-coordinate measurement on the workpiece based on the initial coordinates to acquire measurement parameters of the workpiece in the second coordinate system;

wherein said obtaining initial coordinates of the workpiece based on the measurement platform via the transformation relation previously comprises:

importing the plurality of common measurement points into a data model of the workpiece;

importing the data model into a laser projection system;

wherein 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.

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. 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;

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;

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;

the laser projection system is further used for acquiring initial coordinates of the workpiece based on the measuring platform based on the data model and the conversion relation, and irradiating a second preset area in the first preset area according to the initial coordinates.

4. The measurement apparatus of claim 3, 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.

5. 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 1-2.

6. 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 1-2.

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