Vertical fixed-point test piece laser scanning detection device and detection method thereof

Abstract

The invention belongs to the technical field of laser scanning detection, and provides a vertical fixed-point test piece laser scanning detection device and a detection method thereof.The detection device comprises a driving supporting assembly, a laser emitting assembly and a laser receiving assembly, and the driving supporting assembly comprises a base, a lifting platform, a power supply module, a lifting lead screw, a fixed joint, a sliding joint and a driving motor; the first connecting rod of the laser emitting assembly and the third connecting rod of the laser receiving assembly are rotationally connected with the sliding joint. The driving motor drives the lifting lead screw to rotate and drives the sliding joint on the lifting lead screw to vertically move, the multi-connecting-rod mechanism adjusts the angle between the laser transmitter and the laser receiver under the cooperation of the sliding joint and the fixed joint, and the angle can be automatically and accurately determined within a certain space angle. And the fixed angle detection and the parallel angle detection can be quickly switched, so that the detection of the laser single-path transmitting and receiving type fixed-point test piece is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of laser scanning detection, and in particular relates to a vertical fixed-point test piece laser scanning detection device and a detection method thereof. Background Art

[0002] Due to its technical characteristics such as high brightness, linearity, coherence and monochromaticity, laser can achieve efficient, stable and high-precision non-contact measurement of various types of targets. In recent years, laser detection has achieved remarkable results in various fields such as security inspection, medical imaging, and cultural relics protection.

[0003] When measuring the thickness of a thin film of a test piece, the existing laser scanning detection device usually adopts a single-channel reflection laser detection method. Due to the different measurement requirements and material properties of different test pieces, there are different requirements for the emission and reflection angles and the distance of the test piece when performing single-channel laser detection. Since the various detection requirements are relatively scattered, under the current laboratory conditions, the placement of sensors and test pieces is basically completed by manually building different test platforms. Although it can meet the measurement requirements, the detection operations of different test pieces vary according to the different test platforms, and the platform needs to be repeatedly replaced and adjusted. The overall operation is poorly standardized and the efficiency is low. Therefore, it is necessary to propose a vertical fixed-point test piece laser scanning detection device and a detection method thereof. Summary of the invention

[0004] In response to the problems existing in the prior art, the present invention provides a vertical fixed-point specimen laser scanning detection device, which drives the lifting screw to rotate by driving a motor, thereby driving the sliding joint on the lifting screw to move in the vertical direction. Therefore, the multi-link mechanism adjusts the angle of the laser transmitter and the laser receiver under the cooperation of the sliding joint and the fixed joint, and can automatically and accurately determine the angle within an angle of 50° to 180° in space, and can quickly switch between fixed-angle detection and parallel-angle detection, thereby realizing the detection of laser single-channel emission and reception type fixed-point specimens.

[0005] The vertical fixed-point specimen laser scanning detection device of the present invention comprises a driving support component, a laser emitting component and a laser receiving component, wherein the laser emitting component and the laser receiving component are symmetrically arranged on both sides of the driving support component, and the driving support component comprises a base, a lifting platform, a power supply module, a lifting screw, a fixed joint, a sliding joint and a driving motor, wherein the base is a vertical stand, and a hanging lug slider is arranged on the lifting platform, and the hanging lug slider of the lifting platform is slidably connected to the slide rail on the front side of the base, and the lifting platform can slide up and down along the base and can be positioned and self-locked, and the power supply module is connected to the base The first end of the lifting screw is fixed on the base, the bottom of the fixed joint is fixedly connected to the outer convex seat of the base, the bottom of the sliding joint is fixedly connected to the slider of the lifting screw, the output shaft of the drive motor is connected to the second end of the lifting screw through a coupling, and the drive motor is arranged on the top of the base through a support frame; the laser emitting assembly includes a first connecting rod, a second connecting rod, a emitting arm, a laser emitter and a laser transmission optical path, the first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the second connecting rod is connected to the emitting arm The first end of the arm is rotatably connected, the bottom of the laser transmitter is connected to the second end of the transmitting arm, the laser transmission optical path is connected to the end face of the second connecting rod, the laser transmitter is used to emit laser, and the laser transmission optical path transmits the laser to the surface of the test piece to excite the plasma spectrum; the laser receiving component includes a third connecting rod, a fourth connecting rod, a receiving arm, a laser receiver and a laser receiving optical path, the first end of the third connecting rod is rotatably connected to the first end of the fourth connecting rod, the second end of the fourth connecting rod is rotatably connected to the first end of the receiving arm, the bottom of the laser receiver is connected to the end face of the second connecting rod The second end of the receiving arm is connected, and the laser receiving optical path is connected to the end face of the fourth connecting rod. When the receiving arm moves around the fourth connecting rod, the relative position of the laser receiver and the laser receiving optical path is adjusted; the lifting screw is driven to rotate by the driving motor, and the sliding joint fixedly connected to the slider on the lifting screw is driven to move in the vertical direction, so that the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod adjust the angle between the laser transmitter and the laser receiver under the cooperation of the sliding joint and the fixed joint, so as to realize the detection of laser single-path emission and receiving fixed-point test pieces.

[0006] Preferably, the second end of the first connecting rod and the second end of the third connecting rod are respectively rotatably connected to the sliding joint, and the second end of the second connecting rod and the second end of the fourth connecting rod are respectively rotatably connected to the fixed joint. Under the cooperation of the multi-link and the lifting screw, the running trajectories of the laser transmission optical path and the laser receiving optical path are associated with the geometric relationship between the driving motor stroke and the push-pull angle.

[0007] Preferably, the single-path reflective laser sensor is transmitted according to a preset link geometry by a four-bar mechanism consisting of the first link, the second link, the third link and the fourth link, so that the trajectory of the single-path reflective laser sensor at a fixed angle in space is simplified into a symmetrical swing curve.

[0008] Preferably, when the first rotating pair connecting the transmitting arm and the second connecting rod is locked, the transmitting arm and the second connecting rod move synchronously, and the transmitting arm can be quickly locked after flipping 180° around the first rotating pair, switching from fixed angle detection to parallel angle detection, and the laser transmitter is provided with a rotation axis joint that can realize ±90° rotation and can be fine-tuned in the vertical direction.

[0009] Preferably, each revolute joint is provided with an annular locking structure, which is quickly locked by extrusion deformation.

[0010] In a second aspect, the present invention further provides a detection method for a vertical fixed-point specimen laser scanning detection device, which comprises the following steps:

[0011] S1. Drive debugging: start the drive motor first, drive the multi-link mechanism through the lifting screw, move the device to any angle and measure the angle, adjust the error between the measured angle and the theoretical drive angle within ±3°, then assemble the laser transmitter and laser receiver, start the laser scanning test, and check whether the laser emission and reception are normal;

[0012] S2. Set the rotation angle of the drive motor, and drive the launch arm and the receiving arm to move synchronously to the specified angle and lock them through the cooperation of the lifting screw and the multi-link. The initial state is horizontal placement. The angle θ between the launch arm and the receiving arm under fixed angle detection is:

[0013]

[0014] Wherein, L1 is the distance between the first link joint rotation pair of the launch arm and the fixed joint rotation pair, L2 is the lead of the lifting screw, N is the number of working turns of the drive motor, R1 is the distance between the launch arm sliding joint rotation pair and the fixed joint rotation pair, and R2 is the distance between the launch arm sliding joint rotation pair and the first link joint rotation pair of the launch arm;

[0015] S3, fixed angle and parallel angle mode detection, specifically:

[0016] Fixed-angle detection: Place the test piece in the middle of the lifting platform in the drive support assembly, adjust the lifting platform to a suitable height and lock it, set the laser transmitter and laser receiver vertically, test that the single-channel emission spot can be clearly projected on the surface of the test piece, start the laser transmitter, and obtain the fixed-angle reflected laser circuit signal through the laser receiver;

[0017] Parallel angle detection: The transmitting arm and the receiving arm move to a horizontal state. After both the transmitting arm and the receiving arm are flipped 90°, loosen the locking joint rotation pair between the transmitting arm and the second connecting rod, flip the transmitting arm 180° horizontally, lock the rotation joint again, loosen the locking joint rotation pair between the receiving arm and the second connecting rod, flip the receiving arm 180° horizontally, and lock the rotation joint again. The laser transmitter and the laser receiver are set horizontally, switched to parallel angle detection, start the laser transmitter, and obtain the parallel angle reflection laser circuit signal through the laser receiver;

[0018] S4. The laser receiver transmits the reflected laser loop signal to the processor through a cable. The processor transmits the characteristic logic processing of the laser signal to the upper computer interface. The thickness of the test piece is displayed on the upper computer interface. The detected thickness of the test piece is compared with the prefabricated thickness, and the error σ between the detected thickness of the test piece and the prefabricated thickness is calculated. If the error σ exceeds the allowable error, the test piece is judged to be unqualified.

[0019] Preferably, when the prefabricated thickness of the test piece in step S4 is 10 mm, the error σ is ±0.5 mm.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The vertical fixed-point specimen laser scanning detection device of the present invention adopts single drive control, and through the coordinated arrangement of a transmission screw, a multi-link and a joint, the running trajectory of the laser sensor is associated with the geometric relationship between the motor stroke and the push-pull angle, thereby adjusting the angle between the laser transmitter and the laser receiver, and can automatically and accurately determine the angle within the spatial angle range of 50° to 180°, and can quickly switch between fixed-angle detection and parallel-angle detection, to realize the detection of laser single-path emission and reception type fixed-point specimens, and effectively improve the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the vertical fixed-point specimen laser scanning detection device of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the driving support assembly in the present invention;

[0024] Figure 3a and Figure 3b They are respectively schematic diagrams of the structure of the laser emission assembly in the present invention;

[0025] Figure 4a and Figure 4b They are respectively structural schematic diagrams of the laser receiving assembly in the present invention;

[0026] Figure 5 It is a schematic diagram of the vertical fixed-point specimen laser scanning detection device of the present invention during fixed-angle detection;

[0027] Figure 6 It is a schematic diagram of the vertical fixed-point specimen laser scanning detection device of the present invention in parallel angle detection;

[0028] Figure 7 The present invention is a flow chart of the vertical fixed-point specimen laser scanning detection method.

[0029] Main reference numerals:

[0030] Driving support assembly 1, base 11, lifting platform 12, power supply module 13, lifting screw 14, fixed joint 15, sliding joint 16, driving motor 17, laser emitting assembly 2, first connecting rod 21, second connecting rod 22, transmitting arm 23, laser emitter 24, laser transmission optical path 25, laser receiving assembly 3, third connecting rod 31, fourth connecting rod 32, receiving arm 33, laser receiver 34, laser receiving optical path 35. DETAILED DESCRIPTION

[0031] In order to fully describe the technical content, structural features, objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings.

[0032] The vertical fixed-point specimen laser scanning detection device of the present invention is as follows: Figure 1 As shown, it includes a driving support component 1, a laser emitting component 2 and a laser receiving component 3, and the laser emitting component 2 and the laser receiving component 3 are symmetrically arranged on both sides of the driving support component 1.

[0033] like Figure 2 As shown, the driving support assembly 1 includes a base 11, a lifting platform 12, a power supply module 13, a lifting screw 14, a fixed joint 15, a sliding joint 16 and a driving motor 17. The base 11 is a vertical stand, and the lifting platform 12 is provided with a hanging ear slider. The hanging ear slider of the lifting platform 12 is slidably connected to the slide rail on the front of the base 11. The lifting platform 12 can slide up and down along the base 11 and can be positioned and self-locked. The power supply module 13 is connected to the vertical frame of the base 11, the first end of the lifting screw 14 is fixed on the base 11, the bottom of the fixed joint 15 is fixedly connected to the outer convex seat of the base 11, and the bottom of the sliding joint 16 is fixedly connected to the slider of the lifting screw 14. The output shaft of the driving motor 17 is connected to the second end of the lifting screw 14 through a coupling, and the driving motor 17 is arranged on the top of the base 11 through a support frame. The base 11 has storage space for various cables and electromechanical devices to provide power for the industrial control display and various modules, and ensure that the detection information can be internally transmitted to the industrial control display according to the pre-connected cable route to produce a human-computer interaction effect.

[0034] like Figure 3a and Figure 3bAs shown, the laser emitting assembly 2 includes a first connecting rod 21, a second connecting rod 22, a emitting arm 23, a laser emitter 24 and a laser transmission optical path 25. The first end of the first connecting rod 21 is rotatably connected to the first end of the second connecting rod 22, the second end of the second connecting rod 22 is rotatably connected to the first end of the emitting arm 23, the bottom of the laser emitter 24 is connected to the second end of the emitting arm 23, the laser transmission optical path 25 is connected to the end face of the second connecting rod 22, the laser emitter 24 is used to emit laser, and the laser transmission optical path 25 transmits the laser to the surface of the test piece to excite the plasma spectrum. When the first rotating pair connecting the emitting arm 23 and the second connecting rod 22 is locked, the emitting arm 23 moves synchronously with the second connecting rod 22, and the emitting arm 23 can be quickly locked after flipping 180° around the first rotating pair, switching from fixed angle detection to parallel angle detection, and the laser emitter 24 is provided with a rotation axis joint that can achieve ±90° rotation and can be fine-tuned in the vertical direction.

[0035] like Figure 4a and Figure 4b As shown, the laser receiving assembly 3 includes a third connecting rod 31, a fourth connecting rod 32, a receiving arm 33, a laser receiver 34 and a laser receiving optical path 35. The first end of the third connecting rod 31 is rotatably connected to the first end of the fourth connecting rod 32, the second end of the fourth connecting rod 32 is rotatably connected to the first end of the receiving arm 33, the bottom of the laser receiver 34 is connected to the second end of the receiving arm 33, the laser receiving optical path 35 is connected to the end face of the fourth connecting rod 32, and when the receiving arm 33 moves around the fourth connecting rod 32, the relative position of the laser receiver 34 and the laser receiving optical path 35 is adjusted, and each rotating joint is provided with an annular locking structure, which is quickly locked by extrusion deformation.

[0036] like Figure 5 and Figure 6As shown, the second end of the first link 21 and the second end of the third link 31 are respectively rotatably connected to the sliding joint 16, and the second end of the second link 22 and the second end of the fourth link 32 are respectively rotatably connected to the fixed joint 15. Under the cooperation of the multi-link and the lifting screw 14, the running trajectories of the laser transmission optical path 25 and the laser receiving optical path 35 are associated with the geometric relationship between the travel of the driving motor 17 and the push-pull angle. The four-bar mechanism composed of the first link 21, the second link 22, the third link 31 and the fourth link 32 is used to transmit the single-channel reflective laser sensor according to the preset link geometric relationship, and the trajectory of the single-channel reflective laser sensor at a fixed angle in space is simplified to a symmetrical swing curve. The lifting screw 14 is driven to rotate by the driving motor 17, and the sliding joint 16 fixedly connected to the slider on the lifting screw 14 is driven to move in the vertical direction, so that the first connecting rod 21, the second connecting rod 22, the third connecting rod 31 and the fourth connecting rod 32 can adjust the angle between the laser transmitter 24 and the laser receiver 34 under the cooperation of the sliding joint 16 and the fixed joint 15, and can automatically and accurately determine the angle within the spatial angle range of 50° to 180°, thereby realizing the detection of laser single-channel emission and receiving fixed-point test pieces.

[0037] In a second aspect, the present invention is a detection method for a vertical fixed-point specimen laser scanning detection device, which comprises the following steps: Figure 7 As shown,

[0038] S1. Drive debugging. First start the drive motor 17, drive the multi-link mechanism to move through the lifting screw 14, move the device to any angle and measure the angle, adjust the error between the measured angle and the theoretical drive angle within ±3°, then assemble the laser transmitter 24 and the laser receiver 34, start the laser scanning test, and check whether the laser emission and reception are normal.

[0039] S2. Set the rotation angle of the drive motor 17, and drive the launching arm 23 and the receiving arm 33 to move synchronously to the specified angle and lock them through the cooperation of the lifting screw 14 and the multi-link. The initial state is horizontal placement. The angle θ between the launching arm 23 and the receiving arm 33 under the fixed angle detection is:

[0040]

[0041] In the formula, L1 is the distance between the first link joint rotation pair of the launching arm and the fixed joint rotation pair, L2 is the lead of the lifting screw, N is the number of working turns of the driving motor, R1 is the distance between the launching arm sliding joint rotation pair and the fixed joint rotation pair, and R2 is the distance between the launching arm sliding joint rotation pair and the first link joint rotation pair of the launching arm.

[0042] S3, fixed angle and parallel angle mode detection, specifically:

[0043] Combination Figure 5As shown, fixed-angle detection: place the test piece in the middle of the lifting platform 12 in the driving support assembly 1, adjust the lifting platform 12 to a suitable height and then lock it, the laser transmitter 24 and the laser receiver 34 are vertically arranged, and the test single-channel emission spot can be clearly projected on the surface of the test piece, start the laser transmitter 24, and obtain the fixed-angle reflected laser circuit signal through the laser receiver 34;

[0044] Combination Figure 6 As shown, parallel angle detection: the transmitting arm 23 and the receiving arm 33 move to a horizontal state, and after the transmitting arm 23 and the receiving arm 33 are flipped 90°, the locking joint rotation pair between the transmitting arm 23 and the second connecting rod 22 is loosened, and the transmitting arm 23 is flipped horizontally by 180°, the rotation joint is locked again, the locking joint rotation pair between the receiving arm 33 and the second connecting rod 22 is loosened, and the receiving arm 33 is flipped horizontally by 180°, and the rotation joint is locked again, the laser transmitter 24 and the laser receiver 34 are set horizontally, switched to parallel angle detection, the laser transmitter 24 is started, and the parallel angle reflection laser circuit signal is obtained through the laser receiver 34.

[0045] S4, the laser receiver 34 transmits the reflected laser loop signal to the processor through the cable, and the processor transmits the laser signal feature logic processing to the host computer interface, and displays the thickness of the test piece through the host computer interface. The test thickness of the test piece is compared with the prefabricated thickness, and the error σ between the test thickness and the prefabricated thickness is calculated. If the error σ exceeds the allowable error, the test piece is judged to be unqualified. If the prefabricated thickness of the test piece is 10mm, the error σ is ±0.5mm.

[0046] The vertical fixed-point specimen laser scanning detection device of the present invention drives the lifting screw 14 to rotate by driving the motor 17, thereby driving the sliding joint 16 on the lifting screw 14 to move in the vertical direction, so that the multi-link mechanism adjusts the angle of the laser transmitter 24 and the laser receiver 34 under the cooperation of the sliding joint 16 and the fixed joint 15, and can automatically and accurately determine the angle within the spatial angle of 50° to 180°, and can quickly switch between fixed-angle detection and parallel-angle detection, so as to realize the detection of laser single-channel emission and reception type fixed-point specimens.

[0047] The embodiments described above are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A vertical fixed-point specimen laser scanning detection device, characterized in that: It includes a driving support component, a laser emitting component and a laser receiving component. The laser emitting component and the laser receiving component are symmetrically arranged on both sides of the driving support component. The driving support assembly comprises a base, a lifting platform, a power supply module, a lifting screw, a fixed joint, a sliding joint and a driving motor. The base is a vertical stand, and a hanging ear slider is provided on the lifting platform. The hanging ear slider of the lifting platform is slidably connected to the slide rail on the front of the base. The lifting platform can slide up and down along the base and can be positioned and self-locked. The power supply module is connected to the vertical frame of the base. The first end of the lifting screw is fixed to the base, the bottom of the fixed joint is fixedly connected to the outer convex seat of the base, the bottom of the sliding joint is fixedly connected to the slider of the lifting screw, the output shaft of the driving motor is connected to the second end of the lifting screw through a coupling, and the driving motor is arranged on the top of the base through a support frame; The laser emitting assembly comprises a first connecting rod, a second connecting rod, an emitting arm, a laser emitter and a laser transmission optical path, wherein the first end of the first connecting rod is rotatably connected to the first end of the second connecting rod, the second end of the second connecting rod is rotatably connected to the first end of the emitting arm, the bottom of the laser emitter is connected to the second end of the emitting arm, the laser transmission optical path is connected to the end face of the second connecting rod, the laser emitter is used to emit laser, and the laser transmission optical path transmits laser to the surface of the test piece to excite a plasma spectrum; The laser receiving assembly comprises a third connecting rod, a fourth connecting rod, a receiving arm, a laser receiver and a laser receiving optical path, wherein the first end of the third connecting rod is rotatably connected to the first end of the fourth connecting rod, the second end of the fourth connecting rod is rotatably connected to the first end of the receiving arm, the bottom of the laser receiver is connected to the second end of the receiving arm, the laser receiving optical path is connected to the end surface of the fourth connecting rod, and when the receiving arm moves around the fourth connecting rod, the relative position of the laser receiver and the laser receiving optical path is adjusted; The driving motor drives the lifting screw to rotate, and drives the sliding joint fixedly connected to the slider on the lifting screw to move in the vertical direction, so that the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod adjust the angle between the laser transmitter and the laser receiver under the cooperation of the sliding joint and the fixed joint, so as to realize the detection of laser single-channel emission and reception fixed-point test pieces.

2. The vertical fixed-point specimen laser scanning detection device according to claim 1, characterized in that: The second end of the first connecting rod and the second end of the third connecting rod are respectively rotatably connected to the sliding joint, and the second end of the second connecting rod and the second end of the fourth connecting rod are respectively rotatably connected to the fixed joint. Under the cooperation of the multi-link and the lifting screw, the running trajectories of the laser transmission optical path and the laser receiving optical path are associated with the geometric relationship between the driving motor stroke and the push-pull angle.

3. The vertical fixed-point specimen laser scanning detection device according to claim 1, characterized in that: The single-path reflective laser sensor is transmitted through a four-bar mechanism consisting of the first link, the second link, the third link and the fourth link according to a preset link geometric relationship, and the trajectory of the single-path reflective laser sensor at a fixed angle in space is simplified into a symmetrical swing curve.

4. The vertical fixed-point specimen laser scanning detection device according to claim 1, characterized in that: When the first rotating pair connecting the transmitting arm and the second connecting rod is locked, the transmitting arm and the second connecting rod move synchronously. The transmitting arm can be quickly locked after flipping 180° around the first rotating pair, switching from fixed angle detection to parallel angle detection. The laser transmitter is provided with a rotation axis joint that can achieve ±90° rotation and can be fine-tuned in the vertical direction.

5. The vertical fixed-point specimen laser scanning detection device according to claim 1, characterized in that: Each revolute joint is provided with an annular locking structure, which can be quickly locked through extrusion deformation.

6. A detection method for the vertical fixed-point specimen laser scanning detection device according to any one of claims 1 to 5, characterized in that: It includes the following steps: S1. Drive debugging: start the drive motor first, drive the multi-link mechanism through the lifting screw, move the device to any angle and measure the angle, adjust the error between the measured angle and the theoretical drive angle within ±3°, then assemble the laser transmitter and laser receiver, start the laser scanning test, and check whether the laser emission and reception are normal; S2. Set the rotation angle of the drive motor, and drive the launch arm and the receiving arm to move synchronously to the specified angle and lock them through the cooperation of the lifting screw and the multi-link. The initial state is horizontal placement. The angle θ between the launch arm and the receiving arm under fixed angle detection is: Wherein, L1 is the distance between the first link joint rotation pair of the launch arm and the fixed joint rotation pair, L2 is the lead of the lifting screw, N is the number of working turns of the drive motor, R1 is the distance between the launch arm sliding joint rotation pair and the fixed joint rotation pair, and R2 is the distance between the launch arm sliding joint rotation pair and the first link joint rotation pair of the launch arm; S3, fixed angle and parallel angle mode detection, specifically: Fixed-angle detection: Place the test piece in the middle of the lifting platform in the drive support assembly, adjust the lifting platform to a suitable height and lock it, set the laser transmitter and laser receiver vertically, test that the single-channel emission spot can be clearly projected on the surface of the test piece, start the laser transmitter, and obtain the fixed-angle reflected laser circuit signal through the laser receiver; Parallel angle detection: The transmitting arm and the receiving arm move to a horizontal state. After both the transmitting arm and the receiving arm are flipped 90°, loosen the locking joint rotation pair between the transmitting arm and the second connecting rod, flip the transmitting arm 180° horizontally, lock the rotation joint again, loosen the locking joint rotation pair between the receiving arm and the second connecting rod, flip the receiving arm 180° horizontally, and lock the rotation joint again. The laser transmitter and the laser receiver are set horizontally, switched to parallel angle detection, start the laser transmitter, and obtain the parallel angle reflection laser circuit signal through the laser receiver; S4. The laser receiver transmits the reflected laser loop signal to the processor through a cable. The processor transmits the characteristic logic processing of the laser signal to the upper computer interface. The thickness of the test piece is displayed on the upper computer interface. The detected thickness of the test piece is compared with the prefabricated thickness, and the error σ between the detected thickness of the test piece and the prefabricated thickness is calculated. If the error σ exceeds the allowable error, the test piece is judged to be unqualified.

7. The detection method of the vertical fixed-point specimen laser scanning detection device according to claim 6, characterized in that: When the prefabricated thickness of the test piece in step S4 is 10 mm, the error σ is ±0.5 mm.

Images