A sample detection device and method based on laser tracker

Abstract

The present invention proposes a sample detection device and method based on a laser tracker, including a base, a sample workpiece, a pressure plate, a locking bolt, a magnetic suction seat, an SMR reflective ball and a laser tracker. The sample workpiece and the pressure plate are laid in sequence on the upper part of the base, and the locking bolt connected to the base is assembled in the pressure plate. The magnetic suction seat equipped with the SMR reflective ball is attached to the upper surface of the base, and a laser tracker is arranged beside the base. The sample workpiece is locked on the base by the pressure plate and the locking bolt, and then the SMR reflective ball is driven to move around the sample workpiece by moving the magnetic suction seat. The laser tracker tracks it, records multiple measurement points and fits and analyzes the corresponding straight lines, calculates the size or shape error value according to the relationship between each straight line, and realizes high-precision measurement suitable for samples of various sizes and specifications. This device is suitable for samples of various sizes and specifications, replaces the detection method of the three-coordinate measuring instrument, and effectively reduces the measurement cost under the premise of ensuring high-precision measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of high-precision measurement, and in particular to a sample detection device and method based on a laser tracker. Background Art

[0002] In the process of measuring the error of the shape, position and size of the sample, traditional general-purpose measuring instruments such as outside micrometers, height calipers, and vernier calipers are usually used. With the development of high-precision and sophisticated industrial technology, the actual demand for sample accuracy has gradually increased. At present, multiple three-coordinate measuring machines of different specifications are usually used and set up on the periphery of the sample for high-precision measurement. However, due to the large number of sample sizes and the small application range of three-coordinate measuring machines, and the high price, if it is necessary to measure a larger sample, it is necessary to replace the three-coordinate measuring machine of the corresponding specifications, resulting in high measurement costs. Therefore, how to adapt to the measurement of samples of various sizes and specifications under high-precision technical requirements and reduce measurement costs has become an urgent problem to be solved. Summary of the invention

[0003] In order to be able to measure samples of various sizes and specifications with high precision, the present invention provides a sample detection device and method based on a laser tracker. The method locks the sample workpiece on the base by cooperating with a pressure plate and a locking bolt, and then drives the SMR reflective ball assembled thereon to move around the sample workpiece by moving the magnetic suction seat. The laser tracker arranged on the side tracks the SMR reflective ball, records multiple measurement points during the measurement process, obtains the corresponding straight line through fitting analysis, calculates the size or shape error value according to the relationship between each straight line, and realizes high-precision measurement suitable for samples of various sizes and specifications, solving the technical problem that the high-precision measurement cost of the traditional process method is high and the scope of application is small.

[0004] The solution adopted by the present invention to solve the technical problem is: A template detection device based on a laser tracker includes a base, which is arranged on a horizontal plane and has a plurality of threaded holes inside for providing installation and support; a template workpiece, which is laid on the upper part of the base; a pressure plate, which is attached to the upper part of the template workpiece and has a through groove inside; a locking bolt, which passes through the through groove of the pressure plate and is assembled in the bolt hole of the base, and the pressure plate is used to lock the template workpiece on the base; a magnetic suction seat, which is designed as a cylindrical structure and has a bottom surface attached to the upper surface of the base; an SMR reflective ball, which is assembled on the upper part of the magnetic suction seat; and a laser tracker, which is arranged on the side of the base.

[0005] In order to further solve the technical problem to be solved by the present invention, the present invention provides a method for using a sample detection device based on a laser tracker, comprising the following steps: Step 1. Lay the sample workpiece horizontally on the base, and fix the sample workpiece on the base through the cooperation of the pressure plate and the locking bolt to avoid position change during the measurement process; Step 2. The magnetic suction base equipped with the SMR reflective ball is placed against the side wall of the sample workpiece, and the busbar of the magnetic suction base is ensured to be always in contact during the measurement process; Step 3. Arrange the laser tracker at a position 1.5 meters away from the sample workpiece, start the laser tracker and calibrate it with the SMR reflective ball; Step 4. Move the magnetic suction seat so that the SMR reflection ball circles the sample workpiece, and measure the base surface, end surface and measurement surface of the sample workpiece respectively, and extract no less than 5 measurement points during the measurement process; Step 5. Use software to fit and analyze the measurement points to obtain corresponding straight lines, and calculate the angle, curvature radius, straightness, perpendicularity, parallelism and other dimensional or form error values ​​between the surfaces of the sample workpiece based on the relationship between the straight lines.

[0006] Positive effects: The present invention lays a sample workpiece on the upper part of the base, a pressing plate is attached to the upper part of the sample workpiece, a locking bolt connected to the base is assembled in the pressing plate, a magnetic suction seat with an SMR reflective ball is attached to the upper surface of the base, and a laser tracker is arranged beside the base. The sample workpiece is locked on the base by the pressing plate and the locking bolt, and then the SMR reflective ball assembled thereon is driven to move around the sample workpiece by moving the magnetic suction seat, and the laser tracker arranged on the side tracks the SMR reflective ball, records multiple measurement points during the measurement process, and obtains the corresponding straight line through fitting analysis. At the same time, the size or shape error value is calculated according to the relationship between each straight line, so as to realize high-precision measurement suitable for samples of various sizes. This device is simple and convenient to operate, easy to disassemble and maintain, and can be applied to samples of various sizes and specifications, replacing the detection method of the three-coordinate measuring instrument, and effectively reducing the measurement cost under the premise of ensuring high-precision measurement. It is suitable for application as a sample detection device and method based on a laser tracker. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic top view of an embodiment of the present application; Figure 2 This is a schematic diagram of the sample assembly of the embodiment of the present application.

[0008] In the figure, 1. Base, 2. Sample workpiece, 3. Press plate, 4. Locking bolt, 5. Magnetic suction base, 6. SMR reflective ball, 7. Laser tracker. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0010] As shown in the figure, a sample detection device based on a laser tracker includes: The base 1 is arranged on a horizontal plane and has a plurality of threaded holes therein for providing installation and support; the sample workpiece 2 is laid on the upper part of the base 1; the pressure plate 3 is attached to the upper part of the sample workpiece 2 and has a through groove therein; the locking bolt 4 passes through the through groove of the pressure plate 3 and is assembled in the bolt hole of the base 1, and the pressure plate 3 is used to lock the sample workpiece 2 on the base 1; the magnetic suction seat 5 is designed in a cylindrical structure, and the bottom surface is arranged to fit the upper surface of the base 1; the SMR reflective ball 6 is assembled on the upper part of the magnetic suction seat 5; the laser tracker 7 is arranged on the side of the base 1.

[0011] Specifically, the base 1 is arranged on a horizontal plane, and is provided with a plurality of threaded holes with openings facing upwards, the hole diameter of which is adapted to the outer diameter of the locking bolt 4 for providing installation and support; the sample workpiece 2 is laid on the upper part of the base 1, and the pressure plate 3 is arranged in a close contact with the upper part of the sample workpiece 2, and is provided with a through groove for accommodating the locking bolt 4; the locking bolt 4 is assembled in the bolt hole of the base 1 through the through groove of the pressure plate 3, and the sample workpiece 2 is locked on the base 1 through the pressure plate 3 to prevent the sample workpiece 2 from moving during the measurement process; the magnetic suction seat 5 is designed in a cylindrical structure, and an arc groove with magnetic attraction is arranged on the upper part, and the bottom surface is arranged in a close contact with the upper surface of the base 1; the SMR reflection ball 6 is adsorbed and assembled in the upper arc groove of the magnetic suction seat 5; the laser tracker 7 is arranged on the side of the base 1, at least 1.5 meters away from the sample workpiece 2.

[0012] The working process of this embodiment: A method for using a sample detection device based on a laser tracker comprises the following steps: Step 1. Lay the sample workpiece 2 horizontally on the base 1, and fix the sample workpiece 2 on the base 1 through the cooperation of the pressing plate 3 and the locking bolt 4 to avoid position change during the measurement process; Step 2. The magnetic suction base 5 equipped with the SMR reflective ball 6 is placed against the side wall of the sample workpiece 2, and the busbar of the magnetic suction base 5 is ensured to be always in contact during the measurement process; Step 3. Arrange the laser tracker 7 at a position 21.5 meters away from the sample workpiece, start the laser tracker 7 and calibrate it with the SMR reflective ball 6; Step 4. Move the magnetic suction seat 5 so that the SMR reflection ball 6 circles the sample workpiece 2 for one circle, and measure the base surface, end surface and measurement surface of the sample workpiece 2 respectively, and extract no less than 5 measurement points during the measurement process; Step 5. Use software to fit and analyze the measurement points to obtain corresponding straight lines, and calculate the angle, curvature radius, straightness, verticality, parallelism and other dimensional or shape error values ​​between the surfaces of the sample workpiece 2 based on the relationship between the straight lines.

[0013] Features of the present invention: The present invention lays a sample workpiece 2 on the upper part of the base 1, a pressing plate 3 is attached to the upper part of the sample workpiece 2, a locking bolt 4 connected to the base 1 is assembled in the pressing plate 3, a magnetic suction seat 5 with an SMR reflection ball 6 assembled on the upper part is attached to the upper surface of the base 1, and a laser tracker 7 is arranged on the side of the base 1. In actual use, the sample workpiece 2 is locked on the base 1 by the cooperation of the pressing plate 3 and the locking bolt 4, and then the SMR reflection ball 6 assembled thereon is driven to move around the sample workpiece 2 by moving the magnetic suction seat 5, and the laser tracker 7 arranged on the side tracks the SMR reflection ball 6, records multiple measurement points in the measurement process, and obtains the corresponding straight line through fitting analysis. At the same time, the size or shape error value is calculated according to the relationship between each straight line, so as to realize high-precision measurement suitable for samples of various sizes and specifications. Through this technical solution, the detection method of the three-dimensional coordinate measuring instrument can be replaced, and samples of various sizes and specifications can be applied, and the measurement cost can be effectively reduced under the premise of ensuring high-precision measurement. Moreover, this device is simple and convenient to operate, easy to disassemble and maintain, and convenient for staff to overhaul.

[0014] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sample detection device based on a laser tracker, characterized in that: A base (1) is arranged on a horizontal plane and has a plurality of threaded holes therein for providing installation and support; A sample workpiece (2) is laid on the upper part of the base (1); A pressing plate (3) is attached to the upper part of the sample workpiece (2) and has a through groove formed therein; A locking bolt (4) passes through the through slot of the pressing plate (3) and is assembled into the bolt hole of the base (1), so that the sample workpiece (2) is locked on the base (1) through the pressing plate (3); The magnetic suction seat (5) is designed to be cylindrical in structure, and the bottom surface is arranged to fit the upper surface of the base (1); An SMR reflective ball (6) is mounted on the upper part of the magnetic suction seat (5); A laser tracker (7) is arranged beside the base (1).

2. A method for using a sample detection device based on a laser tracker, characterized in that: The sample detection device based on the laser tracker according to claim 1 comprises the following steps: Step 1. Lay the sample workpiece (2) horizontally on the base (1), and fix the sample workpiece (2) on the base (1) by the cooperation of the pressure plate (3) and the locking bolt (4) to avoid position change during the measurement process; Step 2. The magnetic suction base (5) equipped with the SMR reflective ball (6) is placed against the side wall of the sample workpiece (2), and the busbar of the magnetic suction base (5) is ensured to always be in contact during the measurement process; Step 3. Arrange the laser tracker (7) at a position 1.5 meters away from the sample workpiece (2), start the laser tracker (7) and calibrate it with the SMR reflective ball (6); Step 4. Move the magnetic suction seat (5) so that the SMR reflection ball (6) circles around the sample workpiece (2), and measure the base surface, end surface and measurement surface of the sample workpiece (2) respectively, and extract no less than 5 measurement points during the measurement process; Step 5. Use software to fit and analyze the measurement points to obtain corresponding straight lines, and calculate the angle, radius of curvature, straightness, perpendicularity, parallelism and other dimensional or form error values ​​between the surfaces of the sample workpiece (2) based on the relationship between the straight lines.

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