Laser testing device and testing method

Abstract

The present invention relates to the field of laser testing technology, and discloses a laser testing device and a testing method. The device comprises: a test table, on which a universal clamp assembly for clamping a laser is fixedly installed, the universal clamp assembly is provided with a laser rangefinder, and a movable seat is slidably installed on the test table. The present invention can form an inscribed circle inscribed in the four reflective plates through the rotation of four reflective plates, and the diameter of the inscribed circle is equal to the maximum spot diameter of a laser beam of a qualified laser projected onto a horizontal plane where the reflective plates are located. When the laser beam passes through the inscribed circle and does not irradiate the reflective plates, it means that the laser is qualified and the position is not offset. If it irradiates the reflective plates, correction is required. If there is still a laser beam irradiation point on the reflective plates after correction, it means that the laser is unqualified, thereby ensuring that the qualified laser can project the laser beam onto a spot analyzer for spot analysis without position offset.

Description

Technical Field

[0001] The present invention relates to the technical field of laser testing, and in particular to a laser testing device and a testing method. Background Art

[0002] A laser is a device that can emit laser light. It produces a high-intensity light source with strong coherence and good directionality by exciting a specific medium. As a high-precision optical device, it requires rigorous testing during R&D, production, and even routine maintenance to ensure its performance meets standards. Laser testing covers multiple aspects, including output power / energy, wavelength and spectral characteristics, beam quality, spot shape and distribution, and extreme life testing.

[0003] When testing the spot shape and distribution of a laser, a core consideration is whether the spot diameter formed by the laser projected onto the spot analyzer at different distances is within the allowable error range. Ideally, this test should be performed when the laser beam is completely perpendicular to the detection plane to ensure the accuracy and effectiveness of the measurement. However, in the actual testing process, each replacement of a laser means a new clamping and fixing process, and slight changes in the clamping position or angle fine-tuning are extremely difficult to directly detect and correct with the human eye, which inevitably introduces potential measurement deviations. Even for a qualified laser, even a tiny angular deviation can be magnified into a significant displacement in the long-distance spot projection, causing one side of the spot to exceed the allowable error range, resulting in a misjudgment and mistakenly believed to be diffraction exceeding the standard. Based on this, the present invention purposely provides a laser testing device and a testing method that can ensure that a qualified laser can project a laser beam onto a spot analyzer without position deviation. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser testing device and a testing method to address the deficiencies of the existing technology, so as to solve the technical problem that the existing testing equipment is difficult to ensure that the qualified laser can perform spot analysis without position deviation.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A laser testing device, comprising:

[0007] A test bench, on which a universal fixture assembly for clamping and fixing the laser is fixedly mounted, the universal fixture assembly being provided with a laser rangefinder, a movable base being slidably mounted on the test bench, the movable base being driven to move by a first drive source, and a spot analyzer and a fixed plate being fixedly mounted on the movable base, the fixed plate being located between the spot analyzer and the laser, the fixed plate being provided with a ray through hole, through which a laser beam emitted by the laser passes to irradiate the spot analyzer;

[0008] A hollow disk is rotatably mounted on a fixed plate and driven to rotate by a transmission assembly. Four circumferentially arranged mobile racks are slidably mounted on the hollow disk. The four mobile racks are driven by a drive assembly for synchronous movement. The drive assembly is connected to a laser rangefinder. Each mobile rack is provided with a reflector, and each reflector is located within a ray through-hole. When the transmission assembly drives the hollow disk to rotate ninety degrees, an inscribed circle tangent to the four reflectors is formed within the ray through-hole. The laser rangefinder measures the distance between the spot analyzer and the laser. The drive assembly controls the four mobile racks to move radially along the ray through-hole so that the diameter of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam on the horizontal plane of the reflector plus the maximum allowable error value.

[0009] The movable plate is arranged on the fixed plate and has four circumferentially arranged camera assemblies fixedly mounted thereon. The camera assemblies are connected to the universal clamp assembly. When the laser beam of the laser passes through the inscribed circle, the transmission assembly drives the hollow disk to rotate ninety degrees. During this process, the camera assembly continuously captures the image of the reflector. When there is no laser beam irradiation point on the four reflectors in the image, the laser does not need to be corrected; when there is a laser beam irradiation point on the four reflectors in the image, the camera assembly controls the laser to move in the opposite direction of the irradiation point through the universal clamp assembly to correct the laser. After the laser is corrected, the four reflector irradiation points in the image always exist, and the laser is unqualified.

[0010] As a further solution of the present invention: the reflecting plate is rotatably mounted on the movable frame, the movable plate is slidably mounted on the fixed plate, and is driven to move by the output source. When the movable plate moves, it drives the four reflecting plates to rotate synchronously through the adjusting component. When the movable plate moves to the farthest distance from the fixed plate, the diameter value of the inscribed circle is equal to the standard value of the diameter of the spot formed by the laser beam of the laser on the horizontal plane of the reflecting plate. When the movable plate moves to the closest distance to the fixed plate, the diameter value of the inscribed circle is equal to the standard value of the diameter of the spot formed by the laser beam of the laser on the horizontal plane of the reflecting plate plus the maximum allowable error value.

[0011] As a further solution of the present invention: the drive assembly includes a transmission gear, a threaded rod and a first ring gear, the four threaded rods are rotatably installed in the hollow disc, and each threaded rod is threadedly connected to a corresponding movable frame, the four transmission gears are rotatably installed on the outer wall of the hollow disc, and each transmission gear is coaxially fixedly connected to a corresponding threaded rod, one transmission gear is fixedly connected to the output shaft of the servo motor, the servo motor is connected to the laser rangefinder, and the first ring gear is rotatably installed on the outer wall of the hollow disc, and it is engaged with the four transmission gears.

[0012] As a further solution of the present invention: the transmission assembly includes a driving gear and a second ring gear, the second ring gear is fixedly mounted on the outer wall of the hollow disc, the driving gear is rotatably mounted on the fixed plate, it is engaged with the second ring gear, and it is driven to rotate by the second driving source.

[0013] As a further solution of the present invention: the adjustment component includes a rotating plate, a synchronous belt and a linkage component. The rotating plate is rotatably installed on the movable frame, which is located outside the ray through hole, and is connected to the reflective plate through a synchronous belt. When the movable plate moves, it drives the rotating plate to rotate through the linkage component.

[0014] As a further solution of the present invention: the linkage assembly includes a translation plate, a through slot, a fixed rod, a waist-shaped slot and a spring. The translation plate is slidably installed on the movable frame, and is connected to the movable frame through a spring, and is in contact with the movable plate. The through slot is opened on the translation plate, and the waist-shaped slot is opened at one end of the rotating plate passing through the through slot. The fixed rod is fixedly installed in the through slot, and is slidably connected to the waist-shaped slot.

[0015] As a further solution of the present invention: the distance between the intersection of the rotating plate and the translation plate and the axis of the ray through hole is greater than the distance between the rotation axis of the rotating plate and the axis of the ray through hole.

[0016] A method for testing a laser testing device, the method being applied to the laser testing device as described above, the method comprising the following steps:

[0017] Step S1: The laser is fixedly mounted on a universal fixture assembly, and the distance between the laser and the spot analyzer is measured using a laser rangefinder. The drive assembly then controls the four movable frames to move radially along the ray aperture, such that the diameter of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam on the horizontal plane of the reflector plus the maximum allowable error value.

[0018] Step S2: The laser is then turned on. The laser beam it emits passes through the inscribed circle and the ray hole between the four reflectors and finally irradiates the spot analyzer. At this time, the camera component determines whether the laser needs to be corrected using the universal fixture component.

[0019] Step S3: When the laser beam passes through the inscribed circle, the transmission assembly drives the hollow disk to rotate 90 degrees. During this process, the camera assembly continuously captures images of the reflectors. When there are no laser beam irradiation points on any of the four reflectors in the image, the laser does not need to be corrected. When there are laser beam irradiation points on the four reflectors in the image, the camera assembly controls the laser to move in the opposite direction of the irradiation points through the universal clamp assembly to correct the laser. If the irradiation points on the four reflectors are still present in the image after the laser irradiation is corrected, the laser is unqualified.

[0020] Step S4: Analyze and record the light spot formed by the qualified laser projected onto the light spot analyzer at the distance using the light spot analyzer;

[0021] Step S5: The movable base is driven to move to a different position by the first driving source, and the above steps S1 to S4 are repeated.

[0022] Beneficial effects of the present invention:

[0023] 1. In the present invention, the laser beam will pass through the ray through hole and be projected onto the spot analyzer. The rotation of the four reflectors in the ray through hole can form an inscribed circle inscribed with the four reflectors. The diameter of the inscribed circle is equal to the maximum spot diameter of the laser beam of a qualified laser projected onto the horizontal plane where the reflectors are located. In this way, when the laser beam passes through the inscribed circle and does not irradiate the reflector, it means that the laser is qualified and the position is not offset, so that subsequent tests can continue. If it irradiates the reflector, correction is required. If there is still a laser beam irradiation point on the reflector after correction, it means that the laser is unqualified, thereby ensuring that the qualified laser can project the laser beam onto the spot analyzer for spot analysis without position offset.

[0024] 2. In the present invention, when the distance between the laser and the spot analyzer changes, the four reflectors can move radially along the ray aperture, so that the diameter of the inscribed circle formed by the four reflectors is equal to the maximum spot diameter of the laser beam of a qualified laser projected onto the horizontal plane where the reflectors are located. This ensures that the four reflectors can accurately detect the laser beam at different distances from the test spot analyzer;

[0025] 3. The present invention can change the diameter of the inscribed circle by rotating the reflective plate. The maximum diameter of the inscribed circle is equal to the maximum spot diameter formed by the laser beam of a qualified laser on the horizontal plane of the reflective plate, and the minimum diameter of the inscribed circle is equal to the standard spot diameter formed by the laser beam of a qualified laser on the horizontal plane of the reflective plate. If the laser beam can pass through the maximum diameter of the inscribed circle, it means that the product is qualified, and if it can further pass through the minimum diameter of the inscribed circle, it means that the product is a standard qualified product. In this way, the test results can be classified more finely. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the ray through hole in the present invention;

[0029] Figure 3 It is a structural schematic diagram of the mobile seat in the present invention;

[0030] Figure 4 It is a structural schematic diagram of the fixing plate in the present invention;

[0031] Figure 5 In the present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0032] Figure 6 It is a schematic structural diagram of the rotation of the hollow disc in the present invention;

[0033] Figure 7 It is a structural schematic diagram of the mobile frame in the present invention;

[0034] Figure 8 It is a schematic diagram of the position structure of the translation plate and the moving plate in the present invention;

[0035] Figure 9 This is a schematic diagram of the rotation of the reflector in the present invention;

[0036] Figure 10 It is a schematic diagram of the rotation of the reflector in the present invention.

[0037] In the figure: 1. Test bench; 2. Universal fixture assembly; 3. Laser; 4. Moving seat; 5. Spot analyzer; 6. Fixed plate; 7. Ray hole; 8. Hollow disk; 9. Moving frame; 10. Reflection plate; 11. Drive assembly; 12. First ring gear; 13. Threaded rod; 14. Transmission gear; 15. Servo motor; 16. Drive gear; 17. Second ring gear; 18. Adjustment assembly; 19. Rotating plate; 20. Synchronous belt; 21. Linkage assembly; 22. Translation plate; 23. Through slot; 24. Fixed rod; 25. Waist-shaped slot; 26. Spring; 27. Moving plate; 28. Camera assembly. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] See also Figures 1-10 As shown, the present invention is a laser testing device, comprising:

[0040] A test bench 1 is fixedly mounted with a universal fixture assembly 2 for clamping a laser 3. The universal fixture assembly 2 is provided with a laser rangefinder. A movable base 4 is slidably mounted on the test bench 1. The movable base 4 is driven to move by a first drive source and fixedly mounted with a spot analyzer 5 and a fixed plate 6. The fixed plate 6 is located between the spot analyzer 5 and the laser 3. The fixed plate 6 is provided with a ray through hole 7. The laser beam emitted by the laser 3 passes through the ray through hole 7 and irradiates the spot analyzer 5.

[0041] A hollow disk 8 is rotatably mounted on a fixed plate 6 and driven to rotate by a transmission assembly. Four circumferentially arranged mobile racks 9 are slidably mounted on the hollow disk 8. The four mobile racks 9 are driven by a drive assembly 11 to move synchronously. The drive assembly 11 is connected to a laser rangefinder. Each mobile rack 9 is provided with a reflector 10. Each reflector 10 is located in the ray through-hole 7. When the transmission assembly drives the hollow disk 8 to rotate ninety degrees, an inscribed circle tangent to the four reflectors 10 is formed in the ray through-hole 7. The laser rangefinder measures the distance between the spot analyzer 5 and the laser 3. The drive assembly 11 controls the four mobile racks 9 to move radially along the ray through-hole 7 so that the diameter of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam of the laser 3 on the horizontal plane of the reflector 10 plus the maximum allowable error value.

[0042] The movable plate 27 is arranged on the fixed plate 6, and four circumferentially arranged camera assemblies 28 are fixedly installed on it. The camera assembly 28 is connected to the universal clamp assembly 2. When the laser beam of the laser 3 passes through the inscribed circle, the transmission assembly drives the hollow disk 8 to rotate ninety degrees. During this process, the camera assembly 28 continuously captures the image of the reflector 10. When there are no laser beam irradiation points on the four reflectors 10 in the image, the laser 3 does not need to be corrected; when there are laser beam irradiation points on the four reflectors 10 in the image, the camera assembly 28 controls the laser 3 to move in the opposite direction of the irradiation point through the universal clamp assembly 2 to correct the laser 3. After the laser 3 is corrected, the irradiation points of the four reflectors 10 in the image always exist, and the laser 3 is unqualified.

[0043] In one case of this embodiment, the maximum spot diameter value is equal to the standard spot diameter value plus the maximum allowable error value. The first driving source can be a reciprocating cylinder, an electric telescopic rod and other components. The universal clamp assembly 2 includes a spherical connector, a clamping mechanism, an adjustment rod, etc. The reflector 10 includes a shooting head, an image processing system, a signal transmission system, etc. It should be noted that the above-mentioned components and laser rangefinder are all existing technologies, and the present invention does not improve them. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0044] The working principle of the present invention is as follows: according to the actual distance between the spot analyzer 5 and the laser 3 measured by the laser rangefinder, the maximum spot diameter of the laser beam of the qualified laser 3 projected onto the horizontal plane where the reflector 10 is located at the distance is obtained, and the driving component 11 is used to control the movement of the movable frame 9 so that the reflector 10 is moved to the appropriate position, such as Figure 4 Taking the example shown, if the laser 3 is qualified and the position is not offset at this time, the laser beam of the laser 3 will pass through the four reflective plates 10, and when the subsequent transmission component drives the hollow disk 8 to rotate ninety degrees, the laser beam in the image captured by the camera component 28 will not be irradiated on the reflective plates 10. During the ninety-degree rotation of the hollow disk 8, it can be regarded as forming an inscribed circle tangent to the four reflective plates 10 in the ray through hole 7, that is, the laser beam is located in the inscribed circle. At this time, the laser beam is projected onto the spot analyzer 5, and the spot analyzer 5 can analyze and record the spot.

[0045] When the laser 3 is qualified but the position is offset, Figure 4 For example, if the laser 3 deviates to the left, the laser beam will exceed the inscribed circle, that is, the camera component 28 will capture the laser beam irradiation point on the left reflector 10. At this time, the camera component 28 controls the universal clamp component 2 to drive the laser 3 to rotate to the right, thereby correcting the laser 3 so that the laser beam returns to the inscribed circle. At this time, the laser beam is projected onto the spot analyzer 5, and the spot analyzer 5 can analyze and record the spot. When the laser 3 is unqualified, that is, the diffraction exceeds the standard, no matter whether the position is offset or not, there will always be a laser beam irradiated on the reflector 10. In order to prevent misjudgment, after multiple corrections, it is found that the laser beam is still irradiated on the reflector 10, and it is judged as unqualified.

[0046] like Figures 1-10 As shown, as a preferred embodiment of the present invention, the reflecting plate 10 is rotatably mounted on the movable frame 9, and the movable plate 27 is slidably mounted on the fixed plate 6, and is driven to move by the output source. When the movable plate 27 moves, it drives the four reflecting plates 10 to rotate synchronously through the adjustment component 18. When the movable plate 27 moves to the farthest distance from the fixed plate 6, the diameter of the inscribed circle is equal to the standard spot diameter formed by the laser beam of the qualified laser 3 on the horizontal plane of the reflecting plate 10. When the movable plate 27 moves to the closest distance to the fixed plate 6, the diameter of the inscribed circle is equal to the maximum spot diameter formed by the laser beam of the qualified laser 3 on the horizontal plane of the reflecting plate 10.

[0047] In one case of this embodiment, the output source may be a reciprocating cylinder, an electric telescopic rod or other components, or other mechanisms capable of achieving linear reciprocating motion, which is not specifically limited in this embodiment.

[0048] In practical application of this embodiment, the diameter of the inscribed circle can be changed by rotating the reflector 10. Figure 10 As shown in the figure, the diameter of the inscribed circle formed by the four reflectors 10 is equal to the maximum spot diameter formed by the laser beam of the qualified laser 3 on the horizontal plane of the reflector 10, that is, the laser beam of the laser 3 can pass through the inscribed circle formed by the reflector 10 in this state and there is no irradiation point on the reflector 10, which means that the laser 3 is qualified. As the reflector 10 rotates, the diameter of the inscribed circle is equal to the standard spot diameter formed by the laser beam of the qualified laser 3 on the horizontal plane of the reflector 10. At this time, Figure 4 Taking the example shown, at this time, the camera component 28 is further used to capture whether there is a laser beam irradiation point on the reflective plate 10, and the universal clamp component 2 is used to correct the laser 3. When the laser beam of the laser 3 can pass through the inscribed circle formed by the reflective plate 10 in this state and there is no irradiation point on the reflective plate 10, it means that the laser 3 is perfectly controlled or the error is extremely small. Secondary classification is performed, and the respective proportions of the perfect rate, qualified rate and unqualified rate in the batch can also be reflected.

[0049] like Figure 3-Figure 5 As shown, as a preferred embodiment of the present invention, the drive assembly 11 includes a transmission gear 14, a threaded rod 13 and a first ring gear 12. The four threaded rods 13 are rotatably mounted in the hollow disk 8, and each threaded rod 13 is threadedly connected to a corresponding movable frame 9. The four transmission gears 14 are rotatably mounted on the outer wall of the hollow disk 8, and each transmission gear 14 is coaxially fixedly connected to a corresponding threaded rod 13. One transmission gear 14 is fixedly connected to the output shaft of the servo motor 15, and the servo motor 15 is connected to the laser rangefinder. The first ring gear 12 is rotatably mounted on the outer wall of the hollow disk 8 and meshes with the four transmission gears 14.

[0050] In one case of this embodiment, it should be noted that the servo motor 15 described in the present invention is prior art and the present invention does not improve it. Therefore, there is no need to disclose their specific mechanical structure and circuit structure, which does not affect the integrity of the present invention.

[0051] In actual application of this embodiment, each time the moving seat 4 moves, the laser rangefinder is required to re-measure the distance between the spot analyzer 5 and the laser 3, so that the servo motor 15 drives the transmission gear 14 to rotate, and the transmission gear 14 drives the threaded rod 13 to rotate, so that the movable frame 9 moves radially along the ray through hole 7 on the hollow disk 8, so that the moving distance meets the distance standard obtained by the laser rangefinder, and when one transmission gear 14 rotates, due to the meshing relationship between the transmission gear 14 and the first ring gear 12, it will drive the first ring gear 12 to rotate synchronously, and the first ring gear 12 will drive the other three transmission gears 14 to rotate synchronously, thereby causing the four threaded rods 13 to rotate synchronously, and controlling the synchronous movement of the four movable frames 9.

[0052] like Figure 3-Figure 6 As shown, as a preferred embodiment of the present invention, the transmission assembly includes a driving gear 16 and a second ring gear 17, the second ring gear 17 is fixedly mounted on the outer wall of the hollow disc 8, and the driving gear 16 is rotatably mounted on the fixed plate 6, which is engaged with the second ring gear 17 and is driven to rotate by the second driving source.

[0053] In one case of this embodiment, the second driving source may be a motor or other components, or other mechanisms capable of achieving rotational motion, which is not specifically limited in this embodiment.

[0054] In actual application of this embodiment, the second driving source drives the driving gear 16 to rotate, and the driving gear 16 can drive the hollow disk 8 to rotate through the meshing teeth with the second gear ring 17. When the hollow disk 8 rotates, an inscribed circle inscribed in the four reflecting plates 10 is formed at the edges of the four reflecting plates 10, thereby performing a 360-degree position detection on the projection of the laser beam of the laser 3 on the plane of the reflecting plate 10, as shown in FIG. Figure 4 and Figure 6 As shown in the example, Figure 6 The reflector 10 in the image sensor can detect whether the laser 3 is offset in the oblique direction.

[0055] like Figure 7-Figure 9 As shown, as a preferred embodiment of the present invention, the adjustment assembly 18 includes a rotating plate 19, a synchronous belt 20 and a linkage assembly 21. The rotating plate 19 is rotatably installed on the movable frame 9, which is located outside the ray through hole 7, and is connected to the reflective plate 10 through the synchronous belt 20. When the movable plate 27 moves, it drives the rotating plate 19 to rotate through the linkage assembly 21.

[0056] In actual application of this embodiment, when the rotating plate 19 rotates, it will drive the reflecting plate 10 to rotate synchronously through the synchronous belt 20, and the rotating plate 19 is located outside the ray through hole 7, which avoids the component that drives the reflecting plate 10 to rotate blocking the laser beam in the ray through hole 7, resulting in the laser beam cannot be accurately projected onto the spot analyzer 5.

[0057] like Figure 7-Figure 9 As shown, as a preferred embodiment of the present invention, the linkage assembly 21 includes a translation plate 22, a through slot 23, a fixed rod 24, a waist-shaped slot 25 and a spring 26. The translation plate 22 is slidably installed on the movable frame 9, and is connected to the movable frame 9 through the spring 26, and is abutted against the movable plate 27. The through slot 23 is opened on the translation plate 22, and the waist-shaped slot 25 is opened at one end of the rotating plate 19 passing through the through slot 23. The fixed rod 24 is fixedly installed in the through slot 23, and is slidably connected to the waist-shaped slot 25.

[0058] In actual application of this embodiment, due to the elastic force of the spring 26, the translation plate 22 will move away from the mobile frame 9 and abut against the mobile plate 27. When the mobile plate 27 moves away from the mobile frame 9, the translation plate 22 moves away from the mobile frame 9. Figure 7 Taking the example shown, the reflective plate 10 is in a vertical state at this time, and when the movable plate 27 approaches the movable frame 9, it will push the translation plate 22 to move toward the movable frame 9, and the fixed rod 24 in the through groove 23 will slide in the waist-shaped groove 25 on the rotating plate 19, thereby driving the rotating plate 19 to rotate in the through groove 23, thereby driving the reflective plate 10 to rotate the angle, and the movement of the movable plate 27 simultaneously drives all the translation plates 22 to move synchronously, so the angle changes of the four reflective plates 10 also occur simultaneously.

[0059] like Figure 3-10 As shown, as a preferred embodiment of the present invention, the distance between the intersection of the rotating plate 19 and the translation plate 22 and the axis of the ray through hole 7 is greater than the distance between the rotation axis of the rotating plate 19 and the axis of the ray through hole 7.

[0060] In actual application, this embodiment limits the distance between the intersection of the rotating plate 19 and the translation plate 22 and the axis of the ray hole 7 to be greater than the distance between the rotation axis of the rotating plate 19 and the axis of the ray hole 7. This ensures that the rotation direction of the rotating plate 19 and the reflecting plate 10 is toward the camera assembly 28, that is, the reflecting plate 10 is rotated toward the camera assembly 28, which is more conducive to the camera assembly 28 to clearly capture the image on the reflecting plate 10.

[0061] See also Figures 1-10 As shown, the present invention is a testing method for laser testing equipment, which is applied to a laser testing equipment as described in the above embodiment, and the method includes the following steps:

[0062] Step S1: The laser 3 is fixedly mounted on the universal fixture assembly 2. The distance between the laser 3 and the spot analyzer 5 is measured using a laser rangefinder. The four movable frames 9 are then controlled by the drive assembly 11 to move radially along the ray through hole 7 so that the diameter of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam of the laser 3 on the horizontal plane of the reflector 10 plus the maximum allowable error value.

[0063] Step S2: The laser 3 is then turned on. The laser beam emitted by it passes through the inscribed circle between the four reflectors 10 and the ray hole 7, and finally irradiates the spot analyzer 5. At this time, the camera assembly 28 determines whether the laser 3 needs to be corrected by the universal clamp assembly 2;

[0064] Step S3: When the laser beam of the laser 3 passes through the inscribed circle, the transmission assembly drives the hollow disc 8 to rotate ninety degrees. During this process, the camera assembly 28 continuously captures images of the reflector 10. When there are no laser beam irradiation points on the four reflectors 10 in the image, the laser 3 does not need to be corrected. When there are laser beam irradiation points on the four reflectors 10 in the image, the camera assembly 28 controls the laser 3 to move in the opposite direction of the irradiation points through the universal clamp assembly 2 to correct the laser 3. When the irradiation points of the four reflectors 10 are always present in the image after the laser 3 is corrected, the laser 3 is unqualified.

[0065] Step S4: Analyze and record the light spot formed by the qualified laser 3 projected onto the light spot analyzer 5 at the distance through the light spot analyzer 5;

[0066] Step S5: The movable base 4 is driven to move to a different position by the first driving source, and the above steps S1 to S4 are repeated.

[0067] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A laser testing device, characterized in that: include: A test bench (1) is fixedly mounted with a universal fixture assembly (2) for clamping a fixed laser (3), the universal fixture assembly (2) being provided with a laser rangefinder, a movable seat (4) being slidably mounted on the test bench (1), the movable seat (4) being driven to move by a first driving source, and a light spot analyzer (5) and a fixed plate (6) being fixedly mounted on the movable seat, the fixed plate (6) being located between the light spot analyzer (5) and the laser (3), the fixed plate (6) being provided with a ray through hole (7), the laser beam emitted by the laser (3) passing through the ray through hole (7) and irradiating onto the light spot analyzer (5); A hollow disc (8) is rotatably mounted on a fixed plate (6) and driven to rotate by a transmission assembly. Four circumferentially arranged moving frames (9) are slidably mounted on the hollow disc (8). The four moving frames (9) are driven by a driving assembly (11) to move synchronously. The driving assembly (11) is connected to a laser rangefinder. Each moving frame (9) is provided with a reflecting plate (10). Each reflecting plate (10) is located in a ray through hole (7). When the transmission assembly drives the hollow disc (8) to rotate ninety degrees, an inscribed circle tangent to the four reflecting plates (10) is formed in the ray through hole (7). The laser rangefinder measures the distance between the spot analyzer (5) and the laser (3). The driving assembly (11) controls the four moving frames (9) to move radially along the ray through hole (7) so that the diameter value of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam of the laser (3) on the horizontal plane of the reflecting plate (10) plus the maximum allowable error value. The movable plate (27) is arranged on the fixed plate (6) and has four circumferentially arranged camera assemblies (28) fixedly mounted thereon. The camera assembly (28) is connected to the universal clamp assembly (2). When the laser beam of the laser (3) passes through the inscribed circle, the transmission assembly drives the hollow disc (8) to rotate ninety degrees. During this process, the camera assembly (28) continuously captures the image of the reflector (10). When there are no laser beam irradiation points on the four reflectors (10) in the image, the laser (3) does not need to be corrected. When there are laser beam irradiation points on the four reflectors (10) in the image, the camera assembly (28) controls the laser (3) to move in the opposite direction of the irradiation points through the universal clamp assembly (2) to correct the laser (3). When the laser (3) is corrected, the irradiation points of the four reflectors (10) always exist in the image, and the laser (3) is unqualified. The reflecting plate (10) is rotatably mounted on the movable frame (9), and the movable plate (27) is slidably mounted on the fixed plate (6), and is driven to move by the output source. When the movable plate (27) moves, it drives the four reflecting plates (10) to rotate synchronously through the adjusting component (18). When the movable plate (27) moves to the farthest distance from the fixed plate (6), the diameter value of the inscribed circle is equal to the standard value of the diameter of the spot formed by the laser beam of the laser (3) on the horizontal plane of the reflecting plate (10). When the movable plate (27) moves to the closest distance from the fixed plate (6), the diameter value of the inscribed circle is equal to the standard value of the diameter of the spot formed by the laser beam of the laser (3) on the horizontal plane of the reflecting plate (10) plus the maximum allowable error value.

2. The laser testing device according to claim 1, characterized in that: The driving assembly (11) includes a transmission gear (14), a threaded rod (13) and a first gear ring (12), wherein the four threaded rods (13) are all rotatably mounted in the hollow disk (8), and each threaded rod (13) is threadedly connected to a corresponding moving frame (9), the four transmission gears (14) are all rotatably mounted on the outer wall of the hollow disk (8), and each transmission gear (14) is coaxially fixedly connected to a corresponding threaded rod (13), one transmission gear (14) is fixedly connected to the output shaft of a servo motor (15), and the servo motor (15) is connected to a laser rangefinder, and the first gear ring (12) is rotatably mounted on the outer wall of the hollow disk (8) and meshes with the four transmission gears (14).

3. The laser testing device according to claim 1, characterized in that: The transmission assembly comprises a driving gear (16) and a second ring gear (17), wherein the second ring gear (17) is fixedly mounted on the outer wall of the hollow disc (8), and the driving gear (16) is rotatably mounted on the fixed plate (6), meshing with the second ring gear (17), and driven to rotate by a second driving source.

4. The laser testing device according to claim 1, characterized in that: The adjusting assembly (18) comprises a rotating plate (19), a synchronous belt (20) and a linkage assembly (21). The rotating plate (19) is rotatably mounted on the movable frame (9), is located outside the ray through hole (7), and is connected to the reflecting plate (10) through the synchronous belt (20). When the movable plate (27) moves, it drives the rotating plate (19) to rotate through the linkage assembly (21).

5. The laser testing device according to claim 4, characterized in that: The linkage assembly (21) includes a translation plate (22), a through slot (23), a fixed rod (24), a waist-shaped slot (25) and a spring (26). The translation plate (22) is slidably mounted on the movable frame (9), is connected to the movable frame (9) via the spring (26), and is in contact with the movable plate (27). The through slot (23) is provided on the translation plate (22), the waist-shaped slot (25) is provided at one end of the rotating plate (19) passing through the through slot (23), and the fixed rod (24) is fixedly mounted in the through slot (23) and is slidably connected to the waist-shaped slot (25).

6. The laser testing device according to claim 5, characterized in that: The distance between the intersection of the rotating plate (19) and the translation plate (22) and the axis of the ray through hole (7) is greater than the distance between the rotation axis of the rotating plate (19) and the axis of the ray through hole (7).

7. A method for testing laser testing equipment, characterized in that: The method is applied to a laser testing device according to any one of claims 1 to 6, and the method comprises the following steps: Step S1: The laser (3) is fixedly mounted on the universal fixture assembly (2), and the distance between the laser (3) and the spot analyzer (5) is measured by a laser rangefinder. Then, the four movable frames (9) are controlled by the driving assembly (11) to move radially along the ray through hole (7) so that the diameter value of the inscribed circle is equal to the standard value of the spot diameter formed by the laser beam of the laser (3) on the horizontal plane of the reflector (10) plus the maximum allowable error value; Step S2: The laser (3) is then turned on, and the laser beam emitted by it passes through the inscribed circle between the four reflective plates (10) and the ray through hole (7), and finally irradiates the spot analyzer (5). At this time, the camera component (28) determines whether it is necessary to correct the laser (3) through the universal clamp component (2); Step S3: When the laser beam of the laser (3) passes through the inscribed circle, the transmission assembly drives the hollow disc (8) to rotate ninety degrees. During this process, the camera assembly (28) continuously captures the image of the reflector (10). When there are no laser beam irradiation points on the four reflectors (10) in the image, the laser (3) does not need to be corrected. When there are laser beam irradiation points on the four reflectors (10) in the image, the camera assembly (28) controls the laser (3) to move in the opposite direction of the irradiation points through the universal clamp assembly (2) to correct the laser (3). When the laser (3) is corrected, the irradiation points of the four reflectors (10) in the image always exist, and the laser (3) is unqualified. Step S4: analyzing and recording the light spot formed by the qualified laser (3) projected onto the light spot analyzer (5) at the distance by the light spot analyzer (5); Step S5: The movable seat (4) is driven to move to a different position by the first driving source, and the above steps S1 to S4 are repeated.

Images