A trapezoidal prism appearance automatic detection device and method based on laser measurement

Abstract

This invention belongs to the field of prism inspection technology and discloses an automatic inspection device and method for trapezoidal prism appearance based on laser measurement. The device includes a support, a loading mechanism, an inspection mechanism, and a prism. It also includes several support and orientation mechanisms mounted on the support for supporting and rotating the prism. The above solution uses a loading robotic arm to place the prism on the support and orientation mechanisms. A gear motor drives gear components to move the support and orientation mechanisms. During the movement of the support and orientation mechanisms, the J-face is first moved towards the laser displacement sensor for inspection. Subsequently, the support and orientation mechanisms rotate the G-face 180 degrees for inspection by the second laser displacement sensor. As the support continues to move the support and orientation mechanisms, the fifth laser displacement sensor inspects the C-face. Finally, an NG robotic arm and an OK robotic arm respectively pick up unqualified and qualified products, thereby improving the efficiency of prism inspection.

Description

Technical Field

[0001] This invention belongs to the field of prism inspection technology, specifically an automatic inspection device and method for the appearance of trapezoidal prisms based on laser measurement. Background Technology

[0002] Trapezoidal prisms are highly regarded precision components in the field of optics, widely used in various optical instruments and equipment. Therefore, accurate dimensional measurement is crucial for the manufacturing and quality control of trapezoidal prisms.

[0003] Traditionally, prism inspection involves operators manually placing the prism on an inspection table, followed by inspection of each facet using a laser displacement sensor. However, this method struggles to ensure consistent prism orientation and position each time, and the flipping operation introduces repeatability errors, directly impacting the stability and reliability of the inspection results. Furthermore, operators cannot meet the stringent requirements of cycle time and consistency in mass production, thus reducing inspection efficiency. Therefore, to address these issues, an automatic inspection device and method for trapezoidal prism appearance based on laser measurement is proposed. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides an automatic inspection device and method for the appearance of trapezoidal prisms based on laser measurement, which solves the problems of repeatability errors and low placement efficiency that affect the inspection efficiency caused by manually placing prisms.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic appearance inspection device for trapezoidal prisms based on laser measurement, comprising a support part, a feeding mechanism, an inspection mechanism, and a prism, and further comprising: a plurality of support and orientation mechanisms mounted on the support part for supporting and rotating the prism; the support part includes a disc base and a bracket rotatably connected thereto, a gear motor is fixedly mounted on the disc base, and a gear component that is transmitted and connected to the output end of the gear motor is fixedly sleeved on the outer periphery of the bracket; a plurality of the support and orientation mechanisms are mounted in a circular array on the bracket.

[0006] Preferably, the prism includes a groove, a J-face, a G-face, an A-face, a D-face, and a C-face.

[0007] Preferably, the feeding mechanism includes a feeding robotic arm, an NG robotic arm, and an OK robotic arm, wherein the feeding robotic arm is used to clamp the prism and place it on the support and orientation mechanism, and the NG robotic arm and the OK robotic arm clamp the unqualified and qualified products.

[0008] Preferably, the detection mechanism includes laser displacement sensor one, laser displacement sensor two, laser displacement sensor three, laser displacement sensor four, and laser displacement sensor five, which are installed at equal angles.

[0009] The laser displacement sensor 1, laser displacement sensor 2, laser displacement sensor 3, laser displacement sensor 4 and laser displacement sensor 5 are used to detect the J-plane, G-plane, A-plane, D-plane and C-plane, respectively.

[0010] Preferably, the disc base has a slope and a cross-section; the support and adjustment mechanism includes a main rod fixedly installed on the bracket, and a clamping assembly for clamping the prism is provided on the main rod, which includes a piston rod movably sleeved at the bottom of the main rod, piston push rods movably sleeved in a symmetrical direction at the top of the main rod, two piston push rods movably sleeved on a prism, a tension spring fixedly connected between opposite ends of the two piston push rods, and a clamping plate located outside the main rod fixedly connected to opposite ends of the two piston push rods; the main rod cavity stores hydraulic oil, and the hydraulic oil can be injected into the top of the main rod when the piston rod moves upward; the groove can be placed on the two clamping plates, a stabilizing assembly for locking the clamping plates is installed at the top of the main rod, and a rotating assembly for rotating the main rod 180 degrees is provided at the bottom of the main rod;

[0011] The bottom end of the piston rod can slide along the top of the edge of the disc seat onto the slope and then fall off the cross section.

[0012] Preferably, the stabilizing assembly includes a rack movably mounted on the top of the main rod, a set of spring limiting rods symmetrically mounted on the top of the main rod, the two ends of the rack being protrusions, and the outer periphery of the clamping plate being provided with teeth that can mesh with the rack, initially with the opening of the spring limiting rod facing upward.

[0013] Preferably, the rotating assembly includes a spring sleeve with a spline sleeve fitted onto the bottom of the main rod, the outer periphery of the spring sleeve is provided with a set of arc-shaped strips, and the bottom of the spring sleeve is provided with two sets of pointed tips and concave surfaces;

[0014] A limiting assembly is rotatably connected to the disc base. The limiting assembly includes a ring component rotatably connected to the disc base. The top of the ring component is provided with several sleeve components. The top of the sleeve component has two sets of pointed tips and two concave surfaces. One of the pointed tips can cooperate with the second concave surface, and the sleeve component can cooperate with the first concave surface. One end of the piston rod passes through the top of the ring component and is movably connected to it. A stop bar is fixedly installed on the top of the disc base. When one of the arc-shaped bars moves, it can be blocked by the stop bar and rotate upward. After rotating ninety degrees, the arc-shaped bar will pass over the stop bar.

[0015] Preferably, a fixing frame is installed on the top of the disc base. The fixing frame includes a frame body fixedly installed at the center of the top of the disc base. An arc-shaped plate is installed on the frame body. The arc-shaped plate has inclined surfaces at both ends. When the support adjustment mechanism rotates to the four positions of the laser displacement sensor, the inclined surfaces will squeeze the protrusion and cause the clamping plate to rotate 90 degrees around the axis, so that the D surface faces the four positions of the laser displacement sensor.

[0016] Preferably, after the support adjustment mechanism passes the laser displacement sensor, the protrusion will disengage from the arc plate, and at this time the protrusion will be reset under the elastic force of the spring limit rod.

[0017] An automatic appearance inspection device for trapezoidal prisms based on laser measurement is adopted. The inspection method is as follows: First, the prism is placed on the support and adjustment mechanism by a loading robotic arm. Then, the gear motor drives the gear components to move the bracket and the support and adjustment mechanism. During the movement of the support and adjustment mechanism, the J-face will first face the laser displacement sensor and be detected together. Then, the support and adjustment mechanism will rotate the G-face by 180 degrees and be detected by the second laser displacement sensor. Further, the bracket drives the support and adjustment mechanism to move and detect the A-face through the third laser displacement sensor. Then, while the bracket drives the support and adjustment mechanism to move, the support and adjustment mechanism will cause the prism to flip, so that the D-face faces the fourth laser displacement sensor and is detected by it. When the bracket continues to drive the support and adjustment mechanism to move, the fifth laser displacement sensor will detect the C-face. Finally, the NG robotic arm and the OK robotic arm will respectively clamp the unqualified and qualified products.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] The above solution uses a loading robotic arm to place the prism on a support and orientation mechanism. A gear motor drives the gear components to move the support and orientation mechanism. During the movement of the support and orientation mechanism, surface J is first moved towards the laser displacement sensor for detection. Then, the support and orientation mechanism rotates surface G by 180 degrees, which is then detected by the second laser displacement sensor. The support then moves the support and orientation mechanism further, and surface A is detected by the third laser displacement sensor. Subsequently, as the support moves the support and orientation mechanism, the prism flips, causing surface D to face the fourth laser displacement sensor for detection. As the support continues to move the support and orientation mechanism, surface C is detected by the fifth laser displacement sensor. Finally, the NG and OK robotic arms respectively pick up the defective and qualified products, thereby improving the efficiency of prism detection. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the top planar structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the detection mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the disc base of the present invention;

[0023] Figure 4 This is a perspective structural diagram of the disk base of the present invention;

[0024] Figure 5 This is a front cross-sectional view of the support and adjustment mechanism of the present invention;

[0025] Figure 6 This is a side sectional view of the supporting orienting mechanism of the present invention;

[0026] Figure 7 for Figure 6 Enlarged view of point P in the middle;

[0027] Figure 8 This is a schematic diagram of the stabilizing component of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the spring sleeve of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of the prism of the present invention.

[0031] In the diagram: 1. Support unit; 11. Disc seat; 111. Slope; 112. Cross-section; 113. Stop bar; 12. Bracket; 13. Gear motor; 14. Gear component; 2. Feeding mechanism; 21. Feeding robotic arm; 22. NG robotic arm; 23. OK robotic arm; 3. Detection mechanism; 31. Laser displacement sensor one; 32. Laser displacement sensor two; 33. Laser displacement sensor three; 34. Laser displacement sensor four; 35. Laser displacement sensor five; 4. Support adjustment mechanism; 41. Main rod; 42. Clamping assembly; 421. Piston push rod; 422. Piston push rod 423. Rod; 424. Clamping plate; 425. Prism; 426. Tension spring; 43. Stabilizing assembly; 431. Rack; 432. Spring limiting rod; 433. Protrusion; 44. Rotating assembly; 441. Spring sleeve; 442. Concave surface one; 443. Tip one; 444. Arc strip; 5. Limiting assembly; 51. Ring part; 52. Sleeve part; 53. Tip two; 54. Concave surface two; 6. Fixing frame; 61. Frame body; 62. Arc plate; 63. Inclined surface; 7. Prism; 71. Groove; 72. J surface; 73. G surface; 74. A surface; 75. D surface; 76. C surface. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 11 As shown, the present invention provides an automatic inspection device and method for the appearance of a trapezoidal prism based on laser measurement, including a support part 1, a feeding mechanism 2, an inspection mechanism 3, and a prism 7, and further including: a plurality of support and orientation mechanisms 4 mounted on the support part 1 for supporting and rotating the prism 7; the support part 1 includes a disc base 11 and a bracket 12 rotatably connected thereto, a gear motor 13 is fixedly mounted on the disc base 11, and a gear component 14 that is transmitted and connected to the output end of the gear motor 13 is fixedly sleeved on the outer periphery of the bracket 12; a plurality of support and orientation mechanisms 4 are mounted in a circular array on the bracket 12;

[0034] The prism 7 includes a groove 71, a J-face 72, a G-face 73, an A-face 74, a D-face 75, and a C-face 76; the loading mechanism 2 includes a loading robotic arm 21, an NG robotic arm 22, and an OK robotic arm 23, wherein the loading robotic arm 21 is used to clamp the prism 7 and place it on the support and orientation mechanism 4, and the NG robotic arm 22 and the OK robotic arm 23 clamp unqualified and qualified products; the detection mechanism 3 includes laser displacement sensors 31, 32, 33, 34, and 35 installed at equal angles; the laser displacement sensors 31, 32, 33, 34, and 35 are used to detect the J-face 72, G-face 73, A-face 74, D-face 75, and C-face 76, respectively.

[0035] Using the above scheme, the loading robot arm 21 places the prism 7 on the support and orientation mechanism 4. The gear motor 13 drives the gear component 14 to move the bracket 12 and the support and orientation mechanism 4. During the movement of the support and orientation mechanism 4, the J-face 72 will first face the laser displacement sensor 1 and be detected. Then, the support and orientation mechanism 4 will rotate the G-face 73 by 180 degrees and be detected by the laser displacement sensor 2. Further, the bracket 12 drives the support and orientation mechanism 4 to move and detect the A-face 74 through the laser displacement sensor 3. Then, while the bracket 12 drives the support and orientation mechanism 4 to move, the support and orientation mechanism 4 will cause the prism 7 to flip, so that the D-face 75 faces the laser displacement sensor 4 and is detected by it. When the bracket 12 continues to drive the support and orientation mechanism 4 to move, the laser displacement sensor 5 will detect the C-face 76. Finally, the NG robot arm 22 and the OK robot arm 23 respectively clamp the unqualified and qualified products, thereby improving the efficiency of prism 7 detection.

[0036] like Figures 1-8 and Figure 11 As shown, the disc base 11 has a slope 111 and a cross-section 112; the support and adjustment mechanism 4 includes a main rod 41 fixedly installed on the bracket 12, and a clamping assembly 42 for clamping the prism 7 is provided on the main rod 41, which includes a piston push rod 421 movably sleeved on the bottom of the main rod 41, and piston push rods 422 movably sleeved on the top of the main rod 41 in a symmetrical direction. The two piston push rods 422 are movably sleeved on the prism 424, and the two piston push rods 422 are fixed at opposite ends. A tension spring 425 is fixedly connected to the main rod 41. The opposite ends of the two piston rods 422 are fixedly connected to a clamping plate 423 located outside the main rod 41. Hydraulic oil is stored in the cavity of the main rod 41. When the piston rod 421 moves upward, it can inject hydraulic oil into the top of the main rod 41. The groove 71 can be placed on the two clamping plates 423. A stabilizing component 43 for locking the clamping plates 423 is installed on the top of the main rod 41. A rotating component 44 for rotating the main rod 41 180 degrees is provided at the bottom of the main rod 41.

[0037] The stabilizing assembly 43 includes a rack 431 movably mounted on the top of the main rod 41. A set of spring limiting rods 432 are symmetrically mounted on the top of the main rod 41. The two ends of the rack 431 are protrusions 433. The outer periphery of the clamping plate 423 is provided with teeth that can mesh with the rack 431. Initially, the opening of the spring limiting rod 432 faces upward.

[0038] The bottom end of the piston rod 421 can slide along the top of the edge of the disc seat 11 to the slope 111 and then fall off the section 112;

[0039] Using the above scheme, the prism 7 is clamped and placed on the clamping plate 423 by the loading robot arm 21, so that the A side 74 faces upward. The support adjustment mechanism 4 is moved as a whole by the bracket 12. At this time, the bottom end of the piston rod 421 will move along the slope 111 and go up. At this time, the hydraulic oil in the main rod 41 will be input to the top and push the piston push rod 422 to move the clamping plate 423 outward and clamp the two sides of the groove 71, thereby ensuring the stability of the prism 7 in the subsequent inspection process.

[0040] At the same time, the rack 431 is engaged with the outer periphery of the clamping plate 423, and the rack 431 and the clamping plate 423 are kept in a stable state by the support of the spring limiting rod 432.

[0041] It is worth noting that after the prism 7 has completed the inspection of each face, the piston rod 421 will fall along the cross section 112, thereby releasing the clamping plate 423 from locking the groove 71, thus facilitating the subsequent material handling by the NG robotic arm 22 and the OK robotic arm 23.

[0042] like Figures 3-6 , Figure 8 , Figure 9 and Figure 11 As shown, the rotating assembly 44 includes a spring sleeve 441 with a spline sleeve fitted at the bottom of the main rod 41. A set of arc-shaped strips 444 are provided on the outer periphery of the spring sleeve 441. The bottom of the spring sleeve 441 is provided with two sets of pointed tips 443 and concave surfaces 442.

[0043] A limiting component 5 is rotatably connected to the disc base 11. The limiting component 5 includes a ring 51 rotatably connected to the disc base 11. The top of the ring 51 is provided with several sleeves 52. The top of the sleeves 52 is provided with two sets of tips 443 and concave surfaces 54. Tip 443 can cooperate with concave surface 54, and sleeve 52 can cooperate with concave surface 442. One end of the piston rod 421 passes through the top of the ring 51 and is movably connected to it. A stop bar 113 is fixedly installed on the top of the disc base 11. When one of the arc-shaped bars 444 moves, it can be blocked by the stop bar 113 and rotate upward. After rotating ninety degrees, the arc-shaped bar 444 will pass over the stop bar 113.

[0044] Using the above scheme, when the prism 7 moves towards the laser displacement sensor 2 32, the stop bar 113 will block one of the arc-shaped bars 444. At this time, the spring sleeve 441 will rotate. Simultaneously, with the cooperation of the spring sleeve 441 and the concave surface 2 54, and the concave surface 1 442 and the tip 2 53, the spring sleeve 441 will move upward and drive the main rod 41 to rotate 180 degrees. At this time, the prism 7 will rotate synchronously so that the G surface 73 faces the laser displacement sensor 2 32, so as to facilitate the detection operation of the surface.

[0045] like Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown, a fixed frame 6 is installed on the top of the disc base 11. The fixed frame 6 includes a frame body 61 fixedly installed at the center of the top of the disc base 11. An arc plate 62 is installed on the frame body 61. The arc plate 62 has inclined surfaces 63 at both ends. When the support adjustment mechanism 4 rotates to the laser displacement sensor 4 34, the inclined surface 63 will squeeze the protrusion 433 and cause the clamping plate 423 to rotate ninety degrees around the axis, so that the D surface 75 faces the laser displacement sensor 4 34.

[0046] Using the above scheme, when the prism 7 is moved to the direction of the laser displacement sensor 34 by the support and adjustment mechanism 4, the laser displacement sensor 33 will be moved by the pressure of the inclined plane 63, thereby driving the clamping plate 423 to rotate through the laser displacement sensor 31. At this time, the A surface 74 will face the laser displacement sensor 34. When the support and adjustment mechanism 4 continues to move the prism 7, the C surface 76 will face the laser displacement sensor 35. When the support and adjustment mechanism 4 passes the laser displacement sensor 35, the protrusion 433 will disengage from the arc plate 62. At this time, the protrusion 433 will be reset under the elastic force of the spring limit rod 432.

[0047] It is worth noting that when the prism 7 is in the position of the laser displacement sensor 33, the laser displacement sensor 33 is directly above the prism 7, and at this time the laser displacement sensor 33 can perform detection operation on surface A 74.

[0048] The working principle and usage process of this invention are as follows: The prism 7 is placed on the support and orientation mechanism 4 by the loading robotic arm 21. Then, the gear motor 13 drives the gear component 14 to move the bracket 12 and the support and orientation mechanism 4. During the movement of the support and orientation mechanism 4, the J surface 72 will first face the laser displacement sensor 1 31 and be detected. Then, the support and orientation mechanism 4 will rotate the G surface 73 by 180 degrees and be detected by the laser displacement sensor 2 32. Further, the bracket 12 drives the support and orientation mechanism 4 to move and detect the A surface 74 through the laser displacement sensor 3 33. Then, while the bracket 12 drives the support and orientation mechanism 4 to move, the support and orientation mechanism 4 will cause the prism 7 to flip, so that the D surface 75 faces the laser displacement sensor 4 34 and is detected by it. When the bracket 12 continues to drive the support and orientation mechanism 4 to move, the laser displacement sensor 5 35 will detect the C surface 76. Finally, the NG robotic arm 22 and the OK robotic arm 23 respectively clamp the unqualified and qualified products, thereby improving the efficiency of prism 7 detection.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic appearance inspection device for a trapezoidal prism based on laser measurement, comprising a support (1), a feeding mechanism (2), an inspection mechanism (3), and a prism (7), characterized in that, Also includes: Several support and orientation mechanisms (4) are installed on the support (1) for supporting and rotating the prism (7). The support part (1) includes a disc base (11) and a bracket (12) rotatably connected thereto. A gear motor (13) is fixedly installed on the disc base (11), and a gear component (14) that is connected to the output end of the gear motor (13) is fixedly sleeved on the outer periphery of the bracket (12). Several of the aforementioned support and orientation mechanisms (4) are mounted in a ring array on the bracket (12).

2. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 1, characterized in that: The prism (7) includes a groove (71), a J-face (72), a G-face (73), an A-face (74), a D-face (75), and a C-face (76).

3. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 2, characterized in that: The feeding mechanism (2) includes a feeding robotic arm (21), an NG robotic arm (22) and an OK robotic arm (23), wherein the feeding robotic arm (21) is used to clamp the prism (7) and place it on the support and orientation mechanism (4), and the NG robotic arm (22) and the OK robotic arm (23) clamp unqualified and qualified products.

4. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 2, characterized in that: The detection mechanism (3) includes laser displacement sensor one (31), laser displacement sensor two (32), laser displacement sensor three (33), laser displacement sensor four (34) and laser displacement sensor five (35) installed at equal angles. The laser displacement sensor 1 (31), laser displacement sensor 2 (32), laser displacement sensor 3 (33), laser displacement sensor 4 (34) and laser displacement sensor 5 (35) are used to detect the J surface (72), G surface (73), A surface (74), D surface (75) and C surface (76), respectively.

5. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 4, characterized in that: The disc base (11) has a slope (111) and a cross section (112). The support and adjustment mechanism (4) includes a main rod (41) fixedly mounted on a bracket (12). A clamping assembly (42) for clamping the prism (7) is provided on the main rod (41), including a piston rod (421) movably sleeved at the bottom of the main rod (41). Piston push rods (422) are symmetrically sleeved on the top of the main rod (41). Two piston push rods (422) are movably sleeved on prisms (424). A tension spring (425) is fixedly connected between opposite ends of the two piston push rods (422). The piston push rod (422) is fixed to a clamping plate (423) located outside the main rod (41) at one end opposite to the piston push rod (422). The main rod (41) contains hydraulic oil, and the piston push rod (421) can inject hydraulic oil into the top of the main rod (41) when it moves upward. The groove (71) can be placed on the two clamping plates (423). The top of the main rod (41) is equipped with a stabilizing component (43) for locking the clamping plates (423). The bottom of the main rod (41) is provided with a rotating component (44) for rotating the main rod (41) by 180 degrees. The bottom end of the piston rod (421) can slide along the top edge of the disc seat (11) to the slope (111) and then fall off the cross section (112).

6. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 5, characterized in that: The stabilizing assembly (43) includes a rack (431) movably mounted on the top of the main rod (41). A set of spring limiting rods (432) are symmetrically mounted on the top of the main rod (41). The two ends of the rack (431) are protrusions (433). The outer periphery of the clamp (423) is provided with teeth that can mesh with the rack (431). Initially, the opening of the spring limiting rod (432) faces upward.

7. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 5, characterized in that: The rotating assembly (44) includes a spring sleeve (441) with a spline sleeve fitted at the bottom of the main rod (41). A set of arc-shaped strips (444) are provided on the outer periphery of the spring sleeve (441). Two sets of pointed tips (443) and concave surfaces (442) are provided at the bottom of the spring sleeve (441). A limiting component (5) is rotatably connected to the disc base (11). The limiting component (5) includes a ring (51) rotatably connected to the disc base (11). The top of the ring (51) is provided with a plurality of sleeves (52). The top of the sleeves (52) is provided with two sets of two sharp points (53) and two concave surfaces (54). The first sharp point (443) can cooperate with the second concave surface (54), and the sleeve (52) can cooperate with the first concave surface (442). One end of the piston rod (421) passes through the top of the ring (51) and is movably connected to it; A stop bar (113) is fixedly installed on the top of the disc base (11). When one of the arc bars (444) moves, it can be blocked by the stop bar (113) and rotate upward. After rotating ninety degrees, the arc bar (444) will pass the stop bar (113).

8. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 6, characterized in that: The top of the disc base (11) is equipped with a fixing frame (6), which includes a frame body (61) fixedly installed at the center of the top of the disc base (11). An arc plate (62) is installed on the frame body (61). The arc plate (62) has inclined surfaces (63) at both ends. When the support adjustment mechanism (4) rotates to the laser displacement sensor four (34), the inclined surface (63) will squeeze the protrusion (433) and cause the clamping plate (423) to rotate ninety degrees around the axis, so that the D surface (75) faces the laser displacement sensor four (34).

9. The automatic appearance inspection device for trapezoidal prisms based on laser measurement according to claim 8, characterized in that: After the support adjustment mechanism (4) passes the laser displacement sensor (35), the protrusion (433) will disengage from the arc plate (62), and at this time the protrusion (433) will be reset under the elastic force of the spring limit rod (432).

10. An automatic appearance inspection method for trapezoidal prisms based on laser measurement, employing an automatic appearance inspection device for trapezoidal prisms based on laser measurement as described in any one of claims 1-4, characterized in that... The detection method is as follows: First, the prism (7) is placed on the support and adjustment mechanism (4) by the loading robot arm (21). Then, the gear motor (13) drives the gear component (14) to move the bracket (12) and the support and adjustment mechanism (4). During the movement of the support and adjustment mechanism (4), the J surface (72) will first face the laser displacement sensor (31) and be detected. Then, the support and adjustment mechanism (4) will rotate the G surface (73) by 180 degrees and be detected by the laser displacement sensor (32). Further, the bracket (12) drives the support and adjustment mechanism (4) to move. The device moves and detects surface A (74) through laser displacement sensor three (33). Then, the bracket (12) moves the support adjustment mechanism (4), which in turn causes the prism (7) to flip, so that surface D (75) faces laser displacement sensor four (34) and is detected by it. When the bracket (12) continues to move the support adjustment mechanism (4), laser displacement sensor five (35) will detect surface C (76). Finally, the NG robotic arm (22) and the OK robotic arm (23) respectively pick up the unqualified and qualified products.

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