Dimension detection device and method based on laser method

Abstract

The size detection device based on the laser method comprises a detection platform, a detected piece supporting assembly for supporting a detected piece and a laser sensor detection assembly, the detected piece supporting assembly and the laser sensor detection assembly are both installed on the detection platform, and the size detection device based on the laser method is characterized in that the laser sensor detection assembly comprises a plurality of laser sensors; the distribution of the plurality of laser sensors is matched with the size and the shape of a detected piece, each laser sensor consists of an emitter for emitting detection laser to the detected piece and a receiver for receiving the detection laser, the emitters and the receivers are arranged in a one-to-one alignment manner along the vertical direction, and the detected piece is supported between the emitters and the receivers. Reliable supporting and positioning of the detected piece are formed, automatic detection of the size of the detected piece is achieved, the size detection efficiency of the detected piece is improved, and the size detection precision is guaranteed. The invention further provides a size detection method based on the laser method.

Description

Technical Field

[0001] The invention relates to a size detection device and method based on a laser method, belonging to the technical field of product size measurement using laser. Background Art

[0002] In the traditional production process, the typical method of dimensional detection is manual measurement using the naked eye, such as micrometers, vernier calipers, and feeler gauges. There are problems such as low detection efficiency, cumbersome operation, data collection errors, and difficulty in analyzing and utilizing data. In order to improve the efficiency and accuracy of dimensional detection, many intelligent or digital detection methods have emerged in the prior art, such as three-coordinate detection, intelligent visual detection system, laser detection, etc. These methods all have their own shortcomings: 1. The three-coordinate detection has high accuracy, large measuring range, long constant temperature time, and harsh use and calibration conditions.

[0003] 2. The intelligent vision system can realize appearance and size detection, and the measurement accuracy is slightly low.

[0004] 3. The characteristics of fully automatic image measuring instruments and comparators are high intelligence, high measurement accuracy and small measurement range; 4. The characteristics of laser detectors are high intelligence, easy to carry, large measurement range, and slightly lower accuracy; 5. Image projectors and laser displacement meters have high measurement accuracy and small measurement range, so they need to be integrated into a system.

[0005] Laser measurement technology has gradually matured, making laser sensors widely used in non-contact surface profile measurement technology. However, the accuracy and reliability of measuring large-sized and complex-structured parts still need to be improved. Using laser measurement technology to scan the contour of the part to be measured to form a reliable support and positioning for the part to be measured, so as to achieve automatic detection of the part to be measured and ensure detection accuracy, is the research and development purpose of this invention. Summary of the invention

[0006] The size detection device based on the laser method provided by the present invention forms a reliable support and positioning for the measured object, realizes automatic detection of the size of the measured object, improves the size detection efficiency of the measured object, and multiple laser sensors are adapted to the size and shape of the measured object, so that the upper computer can accurately fit the contour of the measured object to ensure the size detection accuracy. The present invention also provides a size detection method based on the laser method.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A dimension detection device based on a laser method comprises a detection platform, a test piece support assembly for supporting a test piece, and a laser sensor detection assembly, wherein both the test piece support assembly and the laser sensor detection assembly are mounted on the detection platform, and is characterized in that: the laser sensor detection assembly comprises a plurality of laser sensors, the distribution of the plurality of laser sensors is adapted to the size and shape of the test piece, the laser sensor comprises a transmitter for emitting a detection laser to the test piece and a receiver for receiving the detection laser, the transmitter and the receiver are arranged one by one in vertical alignment, and the test piece is supported between the transmitter and the receiver.

[0008] Preferably, the detection platform is equipped with a transmitter support seat for supporting the transmitter and a receiver support seat for supporting the receiver, the transmitter support seat and the receiver support seat are evenly spaced along the circumferential direction, the receiver support seat is arranged on the inner side of the transmitter support seat, and the circumference of the transmitter support seat distribution is concentric with the circumference of the receiver support seat distribution, the transmitter is arranged downward and installed one-to-one on the transmitter support seat, and the receiver is arranged upward and installed one-to-one on the receiver support seat.

[0009] Preferably, a vertically arranged transmitter mounting plate is fixed on the transmitter support seat, the transmitter is hinged on the transmitter mounting plate, and an adjusting bolt connected to the transmitter and capable of adjusting the transmitter mounting angle is mounted on the transmitter mounting plate.

[0010] Preferably, the test piece support assembly comprises an inner ring support and an outer ring support arranged on the outer periphery of the inner ring support.

[0011] Preferably, the outer ring support member includes a support column and a part reference seat one vertically mounted on the detection platform, and the part reference seat one is horizontally fixed on the top of the support column one. The inner ring support member includes a support column and a part reference seat two vertically mounted on the detection platform, and the part reference seat two is horizontally fixed on the top of the support column two. The part to be measured is supported on the part reference seat one and / or the part reference seat two.

[0012] Preferably, the number of the support pillars 1 and 2 is multiple, the part reference seat 1 and the part reference seat 2 are both annular flat plates that can support the measured part and have a horizontal reference surface, and the part reference seat 1 and the part reference seat 2 are concentrically arranged.

[0013] The size detection method based on the laser method uses the size detection device based on the laser method described above to perform size detection on the measured object, and the steps are as follows: S1: According to the size and shape of the object under test, the number and distribution positions of the laser sensors in the laser sensor detection assembly are adjusted so that the detection lasers emitted by multiple emitters can scan the contour of the object under test, and the position of the object under test support assembly on the detection platform is adjusted so that the object under test support assembly can reliably support the object under test; S2: Use the standard part of the device under test to calibrate the installation angle of the transmitter; S3: supporting the workpiece under test on the workpiece support assembly; S4: Use the host computer to control multiple laser sensors to start scanning the contour of the measured object; S5: The receiver transmits the received laser signal to the host computer, where the outline of the measured object is fitted and the size of the measured object is measured.

[0014] Preferably, step S2 specifically refers to: S21, supporting the standard part of the tested part on the tested part supporting assembly; S22, using a host computer to control multiple laser sensors to start scanning the profile of the standard part; S23, the receiver transmits the received laser signal to the host computer, where the profile of the standard part is fitted and the size of the standard part is measured; S24, compare the measured size of the standard part with the preset size of the standard part. If the measured size of the standard part is within the preset size range of the standard part, the detection laser emitted by the transmitter meets the set requirements. If the measured size of the standard part exceeds the preset size range of the standard part, adjust the installation angle of the transmitter and repeat S21 to S23 until the measured size of the standard part is within the preset size range of the standard part.

[0015] Preferably, “adjusting the installation angle of the transmitter” is to fine-tune the installation angle of the transmitter by rotating the adjustment bolt.

[0016] The beneficial effects of the invention are: The laser-based dimension detection device of the present invention includes multiple laser sensors. The workpiece to be measured is supported between the transmitter and the receiver of the laser sensor. During detection, the workpiece to be measured is supported on the support assembly of the workpiece to be measured, forming a reliable support and positioning for the workpiece to be measured. The multiple laser sensors are controlled and started by the host computer. The transmitter emits a detection laser to scan the contour of the workpiece to be measured. The receiver receives the detection laser passing through the workpiece to be measured and transmits the laser signal to the host computer. The host computer fits the contour of the workpiece to be measured and measures the size of the workpiece to be measured according to the signals transmitted by the multiple laser sensors, thereby realizing automatic detection of the size of the workpiece to be measured and improving the efficiency of size detection of the workpiece to be measured. The multiple laser sensors are adapted to the size and shape of the workpiece to be measured, ensuring that the detection laser emitted by the transmitter can cover the workpiece to be measured, so that the contour of the workpiece to be measured can be accurately fitted on the host computer to ensure the accuracy of size detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a size detection device based on a laser method of the present invention.

[0018] Figure 2 for Figure 1 Top view of the .

[0019] Figure 3 Schematic diagram of the test piece support assembly, transmitter mounting base and receiver mounting base installed on the detection platform. DETAILED DESCRIPTION

[0020] Combine the following Figures 1 to 3 The embodiments of the present invention are described in detail.

[0021] A dimension detection device based on a laser method comprises a detection platform 1, a test piece support component 2 for supporting a test piece 100, and a laser sensor detection component 3. The test piece support component 2 and the laser sensor detection component 3 are both installed on the detection platform 1, and are characterized in that: the laser sensor detection component 3 comprises a plurality of laser sensors 4, the distribution of the plurality of laser sensors is adapted to the size and shape of the test piece, the laser sensor 4 is composed of a transmitter 41 for emitting a detection laser to the test piece and a receiver 42 for receiving the detection laser emitted by the transmitter 412, the transmitter 41 and the receiver 42 are arranged one by one in the vertical direction, and the test piece 100 is supported between the transmitter 41 and the receiver 42.

[0022] The above-mentioned laser-based dimension detection device includes multiple laser sensors 4. The workpiece 100 is supported between the transmitter 41 and the receiver 42 of the laser sensor 4. During detection, the workpiece 100 is supported on the workpiece support assembly 2 to form a reliable support and positioning for the workpiece. The multiple laser sensors 4 are controlled and started by the host computer. The transmitter 41 emits a detection laser to scan the contour of the workpiece. The receiver 42 receives the detection laser passing through the workpiece and transmits the laser signal to the host computer. The host computer fits the contour of the workpiece 100 and measures the size of the workpiece according to the signals transmitted by the multiple laser sensors, thereby realizing automatic detection of the size of the workpiece and improving the efficiency of size detection of the workpiece. The multiple laser sensors are adapted to the size and shape of the workpiece to ensure that the detection laser emitted by the transmitter can cover the workpiece, so that the upper computer can accurately fit the contour of the workpiece to ensure the accuracy of size detection.

[0023] The detection platform is equipped with a transmitter support seat 5 for supporting a transmitter 41 and a receiver support seat 6 for supporting a receiver 42. The transmitter support seat 5 and the receiver support seat 6 are evenly spaced along the circumference. The receiver support seat 6 is arranged inside the transmitter support seat 5, and the circumference of the transmitter support seat 5 is concentric with the circumference of the receiver support seat 6. The transmitter 41 is arranged downward and installed one-to-one on the transmitter support seat 5, and the receiver 42 is arranged upward and installed one-to-one on the receiver support seat 6. The transmitter support seat 5 is used for the installation of the transmitter 41, and the receiver support seat 6 is used for the installation of the receiver 42. A transmitter 41 is installed on each transmitter support seat 5, and a receiver 42 is installed on each transmitter support seat 6, forming a one-to-one correspondence between the transmitter 41 and the receiver 42.

[0024] Among them, a transmitter mounting plate 51 arranged vertically is fixed on the transmitter support seat 5, and the transmitter 41 is hinged on the transmitter mounting plate 51. The transmitter mounting plate 51 is provided with an adjusting bolt 52 connected to the transmitter 41 and capable of adjusting the mounting angle of the transmitter 41. The transmitter mounting plate 51 is arranged vertically. Since there is an error in the verticality of the transmitter mounting plate 51, one end of the adjusting bolt 52 is connected to the transmitter mounting plate 51, and the other end is connected to the transmitter 41. The lower end of the transmitter 41 is hinged on the transmitter mounting plate 51. By rotating the adjusting bolt 52, the angle between the transmitter 41 and the transmitter mounting plate 51 can be adjusted, that is, the mounting angle of the transmitter 41 can be fine-tuned. By fine-tuning the mounting angle of the transmitter 41, the verticality of the laser emitted by the transmitter 41 can be fine-tuned, thereby forming a correction of the mounting angle of the transmitter 41, and ensuring the reliability and accuracy of the detection.

[0025] The test piece support assembly 2 includes an inner ring support 7 and an outer ring support 8 arranged on the outer periphery of the inner ring support 7. The test piece can be supported on the inner ring support 7 and the outer ring support 8, or can be supported on the inner ring support 7 or the inner ring support 8 alone, and the inner ring support 7 and the outer ring support 8 form a support for the test piece.

[0026] The outer ring support 8 includes a support column 1 81 and a part reference seat 1 82 vertically mounted on the detection platform, and the part reference seat 1 82 is horizontally fixed on the top of the support column 1 81. The inner ring support 7 includes a support column 2 71 and a part reference seat 2 72 vertically mounted on the detection platform, and the part reference seat 2 72 is horizontally fixed on the top of the support column 2 71. The measured part 100 is supported on the part reference seat 1 82 and / or the part reference seat 2 72. A plurality of support columns 1 81 support the part reference seat 1 82, and a plurality of support columns 2 71 support the part reference seat 2 72, so that the part reference 1 82 and the part reference seat 2 72 are horizontally fixed without tilting, forming a support reference plane for the measured part.

[0027] Among them, the number of the support column 1 81 and the support column 2 71 are both multiple, the part reference seat 1 82 and the part reference seat 2 72 are annular flat plates that can support the measured object 100 and have a horizontal reference surface, and the part reference seat 1 82 and the part reference seat 2 72 are concentrically arranged. The part reference seat 1 82 and the part reference seat 2 72 are the support reference surfaces of the measured object, which can cooperate with the sink on the measured object to form the positioning of the measured object. After the support column 1 81 and the support 2 71 are installed in place, the verticality should be tested, and the part reference seat 1 82 and the part reference seat 2 72 should be tested for horizontality after being installed in place. When the verticality and horizontality do not meet the set requirements, they should be adjusted until they meet the set requirements, so as to ensure that the horizontality of the horizontal reference surfaces of the part reference seat 1 82 and the part reference seat 2 72 during the test meets the predetermined requirements, improve the structural reliability of the detection device, and improve the accuracy of dimensional detection.

[0028] The present invention also protects a dimension detection method based on a laser method, which uses the above-mentioned dimension detection device based on a laser method to perform dimension detection on a measured object, and the steps are as follows: S1: According to the size and shape of the object under test 100, the number and distribution position of the laser sensors 4 in the laser sensor detection assembly 3 are adjusted so that the detection lasers emitted by the multiple emitters 41 can scan the contour of the object under test, and the position of the object under test support assembly on the detection platform is adjusted so that the object under test support assembly 2 can reliably support the object under test; S2: Use the standard part of the device under test 100 to calibrate the installation angle of the transmitter; S3: supporting the test piece 100 on the test piece supporting assembly 2; S4: Using a host computer to control multiple laser sensors to start scanning the contour of the object under test 100; S5: The receiver transmits the received laser signal to the host computer, where the outline of the measured object is fitted and the size of the measured object is measured.

[0029] In the above-described dimension detection method based on the laser method, multiple laser sensors 4 are controlled and started by the host computer, and the detection laser is emitted by the transmitter 41 to perform contour scanning on the measured object. The receiver 42 receives the detection laser passing through the measured object and transmits the laser signal to the host computer. The host computer fits the contour of the measured object 100 and measures the size of the measured object according to the signals transmitted by the multiple laser sensors, thereby realizing automatic detection of the size of the measured object and improving the efficiency of dimension detection of the measured object. Multiple laser sensors are adapted to the size and shape of the measured object to ensure that the detection laser emitted by the transmitter can cover the measured object, so that the upper computer can accurately fit the contour of the measured object and ensure the accuracy of dimension detection.

[0030] Wherein, step S2 specifically refers to: S21, supporting the standard part of the tested part on the tested part supporting assembly 2; S22, using a host computer to control multiple laser sensors to start scanning the profile of the standard part; S23, the receiver 42 transmits the received laser signal to the host computer, where the profile of the standard part is fitted and the size of the standard part is measured; S24, compare the measured size of the standard part with the preset size of the standard part. If the measured size of the standard part is within the preset size range of the standard part, the detection laser emitted by the transmitter meets the set requirements. If the measured size of the standard part exceeds the preset size range of the standard part, adjust the installation angle of the transmitter 41 and repeat S21 to S23 until the measured size of the standard part is within the preset size range of the standard part.

[0031] First, the detection device is calibrated with the standard part of the measured part until the measurement size of the standard part is within the preset size range, and then the measured part is tested, which can ensure the measurement accuracy and improve the measurement reliability.

[0032] Among them, "adjusting the installation angle of the emitter 41" means to fine-tune the installation angle of the emitter by rotating the adjustment bolt. The angle between the emitter 41 and the emitter mounting plate 51 can be adjusted by rotating the adjustment bolt 52, that is, the installation angle of the emitter 41 can be fine-tuned. By fine-tuning the installation angle of the emitter 41, the verticality of the laser emitted by the emitter 41 can be fine-tuned, thereby correcting the installation angle of the emitter 41 to ensure the reliability and accuracy of the detection.

[0033] The above is a complete description of the technical solutions of the embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A dimension detection device based on a laser method, comprising a detection platform, a test piece support assembly for supporting the test piece, and a laser sensor detection assembly, wherein the test piece support assembly and the laser sensor detection assembly are both mounted on the detection platform, and characterized in that: The laser sensor detection assembly includes multiple laser sensors, the distribution of which is adapted to the size and shape of the object under test. The laser sensor consists of a transmitter for emitting detection laser to the object under test and a receiver for receiving the detection laser. The transmitter and the receiver are vertically aligned one by one, and the object under test is supported between the transmitter and the receiver.

2. The size detection device based on the laser method according to claim 1 is characterized in that: The detection platform is equipped with a transmitter support seat for supporting the transmitter and a receiver support seat for supporting the receiver. The transmitter support seat and the receiver support seat are evenly spaced along the circumferential direction. The receiver support seat is arranged on the inner side of the transmitter support seat, and the circumference of the transmitter support seat is concentric with the circumference of the receiver support seat. The transmitter is arranged downward and installed one-to-one on the transmitter support seat, and the receiver is arranged upward and installed one-to-one on the receiver support seat.

3. The size detection device based on the laser method according to claim 1 is characterized in that: A vertically arranged transmitter mounting plate is fixed on the transmitter support seat, the transmitter is hinged on the transmitter mounting plate, and an adjusting bolt connected with the transmitter and capable of adjusting the transmitter mounting angle is arranged on the transmitter mounting plate.

4. The size detection device based on the laser method according to claim 1 is characterized in that: The test piece support assembly comprises an inner ring support and an outer ring support arranged on the outer periphery of the inner ring support.

5. The size detection device based on the laser method according to claim 4 is characterized in that: The outer ring support member includes a support column and a part reference seat one vertically mounted on the detection platform, and the part reference seat one is horizontally fixed on the top of the support column one. The inner ring support member includes a support column and a part reference seat two vertically mounted on the detection platform, and the part reference seat two is horizontally fixed on the top of the support column two. The part to be measured is supported on the part reference seat one and / or the part reference seat two.

6. The laser-based size detection device according to claim 5, characterized in that: The number of the support column 1 and the support column 2 are both multiple, the part reference seat 1 and the part reference seat 2 are both annular flat plates that can support the measured part and have a horizontal reference surface, and the part reference seat 1 and the part reference seat 2 are concentrically arranged.

7. A laser-based dimension detection method, using the laser-based dimension detection device according to any one of claims 1 to 5 to perform dimension detection on a workpiece, the steps being: S1: According to the size and shape of the object under test, the number and distribution positions of the laser sensors in the laser sensor detection assembly are adjusted so that the detection lasers emitted by multiple emitters can scan the contour of the object under test, and the position of the object under test support assembly on the detection platform is adjusted so that the object under test support assembly can reliably support the object under test; S2: Use the standard part of the device under test to calibrate the installation angle of the transmitter; S3: supporting the workpiece under test on the workpiece support assembly; S4: Use the host computer to control multiple laser sensors to start scanning the contour of the measured object; S5: The receiver transmits the received laser signal to the host computer, where the outline of the measured object is fitted and the size of the measured object is measured.

8. The laser-based size detection method according to claim 7, characterized in that: Step S2 specifically refers to: S21, supporting the standard part of the tested part on the tested part supporting assembly; S22, using a host computer to control multiple laser sensors to start scanning the profile of the standard part; S23, the receiver transmits the received laser signal to the host computer, where the profile of the standard part is fitted and the size of the standard part is measured; S24, compare the measured size of the standard part with the preset size of the standard part. If the measured size of the standard part is within the preset size range of the standard part, the detection laser emitted by the transmitter meets the set requirements. If the measured size of the standard part exceeds the preset size range of the standard part, adjust the installation angle of the transmitter and repeat S21 to S23 until the measured size of the standard part is within the preset size range of the standard part.

9. The laser-based size detection method according to claim 8, characterized in that: "Adjusting the installation angle of the transmitter" means to fine-tune the installation angle of the transmitter by rotating the adjusting bolt.

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