Laser measuring device suitable for large-size component

Abstract

The utility model relates to the technical field of laser measurement, and discloses a laser measurement device suitable for a large-size component. The objective of the utility model is to solve the technical problem that the measurement of a large-size object is difficult to realize under the condition that the size of a measuring instrument is not increased in the prior art. The device comprises at least two groups of reflector assemblies, a combined lens and a CCD imaging unit which are sequentially arranged along the laser emission direction, the reflector assemblies are symmetrically distributed by taking the optical axis as the center and comprise two reflectors which are arranged in parallel and of which the reflecting surfaces are oppositely arranged; the combined lens comprises a convex lens and a meniscus lens; the CCD imaging unit comprises a photosensitive element. The device is applied to large-size measurement in a certain range; a light splitting reflective mirror is additionally arranged at the front end of the measuring instrument, so that large-size measurement is realized under the condition that the size of the measuring instrument is increased and limited.

Description

Technical Field

[0001] This utility model relates to the field of laser measurement technology, and in particular to a laser measurement device suitable for large-sized components. Background Technology

[0002] Laser measurement technology utilizes the high directionality, monochromaticity, and coherence of laser light. It achieves precise measurement by emitting a laser beam, receiving its reflected signal, and calculating the round-trip time of the light wave. Common measurement methods include: Pulse method: calculating distance by emitting a short laser pulse and measuring its round-trip time; Phase method: indirectly measuring time by measuring the phase change of a modulated laser beam. Laser measurement devices are non-contact, do not affect the movement of the measured object, and are suitable for complex environments. They can achieve measurement accuracy at the millimeter or even nanometer level. Measurement speed is fast, suitable for real-time monitoring. They have strong resistance to optical and electrical interference. They are widely used in various fields, including: parts processing accuracy inspection, assembly quality monitoring, land surveying, building verticality inspection, structural deformation monitoring, topographic surveying, underground resource exploration, aircraft assembly monitoring, parts quality inspection, surgical navigation, and biomedical imaging.

[0003] Chinese patent document 202411208089.0 discloses a laser measuring instrument, including: a storage box, in which a laser measuring instrument body is disposed, and a limiting component is disposed at the bottom of the storage box; a box cover, which is hinged to one side of the upper end face of the storage box, and a protective component is disposed on the side of the box cover; and an adjustment component disposed at the bottom of the storage box, the adjustment component including a first support leg, and a second support leg disposed inside the first support leg.

[0004] However, the above-mentioned solutions have at least the following technical problems during implementation: it is difficult to measure large-sized objects without increasing the size of the measuring instrument. Therefore, there is an urgent need to propose a laser measuring device suitable for large-sized components. Summary of the Invention

[0005] In view of the above technical problems, this disclosure provides a laser measuring device suitable for large-sized components, which solves the technical problem in the prior art that it is difficult to measure large-sized objects without increasing the size of the measuring instrument.

[0006] According to one aspect of this disclosure, a laser measurement device suitable for large-sized components is provided, disposed in the laser optical path of a laser emitter. The laser measurement device includes at least two sets of reflector assemblies, a combined lens, and a CCD imaging unit arranged sequentially along the laser emission direction. The reflector assemblies are symmetrically distributed around the optical axis and include two parallel reflectors with their reflective surfaces facing each other to converge a large-sized light curtain to a small-sized adaptive combined lens. The combined lens includes a convex lens and a meniscus lens to converge the light curtain to the CCD imaging unit. The CCD imaging unit includes a photosensitive element to receive optical signals and convert them into electrical signals.

[0007] In some embodiments of this disclosure, the reflector assembly includes a first reflector and a second reflector arranged in parallel. The first reflector is arranged at a 45° angle inward to the incident laser beam to reflect the laser beam toward the direction of the second reflector. The second reflector is arranged parallel to the inside of the first reflector to reflect the laser beam toward the combined lens.

[0008] In some embodiments of this disclosure, the reflector assembly is mounted on an angle adjustment mechanism, the angle adjustment mechanism including a base, an arc-shaped guide rail inside the base, a fan-shaped slider installed inside the base, an arc-shaped groove at the bottom of the fan-shaped slider that fits into the arc-shaped guide rail to enable the fan-shaped slider to rotate within the base, and a mounting groove above the fan-shaped slider to mount the reflector.

[0009] In some embodiments of this disclosure, the fan-shaped slider and one side of the base are provided with angle markings.

[0010] In some embodiments of this disclosure, a drive structure is mounted on the other side of the fan-shaped slider. The drive structure includes a motor, which is connected to the fan-shaped slider via a sprocket and chain transmission structure.

[0011] In some embodiments of this disclosure, the reflective surfaces of both the first and second reflectors are coated with a high-reflectivity coating.

[0012] In some embodiments of this disclosure, the combined lens further includes at least one aspherical lens for correcting aberrations.

[0013] In some embodiments of this disclosure, the convex lens and the meniscus lens are both made of low-dispersion optical glass.

[0014] In some embodiments of this disclosure, both the reflector assembly and the combined lens are provided with a dustproof protective cover, which is made of a transparent material.

[0015] The beneficial effects of this utility model are as follows:

[0016] By focusing a large light curtain onto a small, compatible lens using a reflector assembly, the beam divergence problem when measuring large components is effectively solved, improving the concentration of the light signal and measurement accuracy. The convex lens, meniscus lens, and aspherical lens in the lens work together to correct beam aberrations, further enhancing image quality and ensuring accurate measurement results. The reflector's reflective surface is coated with a high-reflectivity layer, reducing light loss and increasing light signal intensity, thus improving measurement accuracy. The reflector assembly is mounted on an angle adjustment mechanism, using a motor-driven fan-shaped slider for precise angle adjustment, adapting to large components of different sizes and shapes, improving the device's flexibility and applicability. Angle markings on the fan-shaped slider and one side of the base facilitate precise control of the reflector's adjustment angle, ensuring stability during measurement. Both the reflector assembly and the lens are equipped with transparent dustproof covers, effectively preventing dust and external environmental interference with optical components, extending equipment lifespan, and ensuring measurement reliability. The convex and meniscus lenses utilize low-dispersion optical glass to reduce chromatic aberration and beam distortion, improve beam focusing performance, and further enhance measurement accuracy. An aspherical lens is incorporated into the combined lens assembly to effectively correct aberrations and ensure high-quality imaging of the beam on the CCD imaging unit. The angle adjustment mechanism employs a motor drive, using a sprocket and chain transmission structure to achieve precise rotation of the fan-shaped slider, improving the automation level of the device and reducing human error. The reflector assembly, combined lens assembly, and CCD imaging unit are arranged sequentially along the laser emission direction, resulting in a compact structure that facilitates installation and maintenance. The dust cover is made of transparent material, protecting the optical components while allowing for easy observation and maintenance. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a laser measurement device suitable for large-sized components;

[0018] Figure 2 A schematic diagram of a laser measurement device suitable for large-sized components;

[0019] Figure 3 This is a schematic diagram of the angle adjustment mechanism;

[0020] Figure 4 This is a schematic diagram of the angle adjustment mechanism from another perspective;

[0021] The components in the diagram are named as follows: 1. Reflector assembly; 2. Combined lens; 3. CCD imaging unit; 4. Convex lens; 5. Meniscus lens; 6. First reflector; 7. Second reflector; 8. Base; 9. Arc-shaped guide rail; 10. Fan-shaped slider; 11. Arc-shaped groove; 12. Mounting slot; 13. Angle markings; 14. Motor; 15. Sprocket and chain drive structure; 16. Dustproof protective cover. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1

[0023] This example discloses a laser measurement device suitable for large-sized components; see [link to documentation]. Figures 1 to 4 Located on the laser light path of the laser emitter, the laser measurement device includes at least two sets of reflector assemblies 1, a combined lens 2, and a CCD imaging unit 3 arranged sequentially along the laser emission direction. The reflector assembly 1 is symmetrically distributed around the optical axis and includes two parallel reflectors with their reflective surfaces facing each other to converge a large light curtain to a small-sized adapter combined lens 2. The combined lens 2 includes a convex lens 4 and a meniscus lens 5 to gather and focus the light curtain to the CCD imaging unit 3. The CCD imaging unit 3 includes a photosensitive element to receive light signals and convert them into electrical signals.

[0024] The reflector assembly 1 includes a first reflector 6 and a second reflector 7 arranged in parallel. The first reflector 6 is arranged inward at a 45° angle to the incident laser beam to reflect the laser beam to the direction of the second reflector 7. The second reflector 7 is arranged in parallel inside the first reflector 6 to reflect the laser beam to the combined lens 2.

[0025] The reflector assembly 1 is mounted on the angle adjustment mechanism, which includes a base 8, an arc-shaped guide rail 9 inside the base 8, a fan-shaped slider 10 inside the base 8, an arc-shaped groove 11 at the bottom of the fan-shaped slider 10 that fits into the arc-shaped guide rail 9 to allow the fan-shaped slider 10 to rotate within the base 8, and a mounting groove 12 above the fan-shaped slider 10 to mount the reflector.

[0026] Angle lines 13 are set on one side of the fan-shaped slider 10 and the base 8.

[0027] A drive structure is installed on the other side of the fan-shaped slider 10. The drive structure includes a motor 14, which is connected to the fan-shaped slider 10 via a sprocket and chain transmission structure 15.

[0028] The reflective surfaces of both the first reflector 6 and the second reflector 7 are coated with a high-reflectivity coating.

[0029] The combined lens 2 also includes at least one aspherical lens for correcting aberrations.

[0030] Both the convex lens 4 and the meniscus lens 5 are made of low-dispersion optical glass.

[0031] Both the mirror assembly 1 and the combined lens 2 are equipped with dustproof protective covers 16, which are made of transparent material.

[0032] This application is applied to large-size measurements within a certain range. This optical path cleverly utilizes a reflector to focus the light curtain of a large size onto a small lens. Through several sets of combined lenses, the light curtain is further focused onto the camera's CCD. The large-size measurement is then calculated through program processing. By adding a beam-splitting reflector to the front of the measuring instrument, large-size measurements are achieved with limited increase in the instrument's size.

[0033] During operation, the laser beam first passes through the reflector assembly 1, and the first reflector 6 reflects the laser beam to the direction of the second reflector 7. The second reflector 7 further reflects the laser beam to the combined lens 2. This allows a large light curtain to be focused onto a small-sized adapter combined lens 2, ensuring beam concentration and measurement accuracy. The combined lens 2 includes a convex lens 4, a meniscus lens 5, and at least one aspherical lens. The light curtain is then focused onto the CCD imaging unit 3. The aspherical lens corrects beam aberrations, while the convex lens 4 and meniscus lens 5 use low-dispersion optical glass to further reduce chromatic aberration and beam distortion, ensuring beam focusing performance. The beam focused by the combined lens 2 is received by the CCD imaging unit 3. The CCD imaging unit 3 includes a photosensitive element that converts light signals into electrical signals to complete the measurement process. The reflector assembly 1 is mounted on an angle adjustment mechanism. The bottom of the fan-shaped slider 10 has an arc-shaped groove 11 that cooperates with the arc-shaped guide rail 9 to allow the fan-shaped slider 10 to rotate within the base 8. Motor 14 drives the sector slider 10 to rotate via sprocket and chain transmission structure 15, thereby achieving precise angle adjustment of the reflector assembly 1. Angle markings 13 are provided on one side of the sector slider 10 and the base 8 to facilitate precise control of the reflector's adjustment angle and ensure the stability of the measurement process. Both the reflector assembly 1 and the combined lens 2 are equipped with dustproof protective covers 16 made of transparent material, effectively preventing dust and external environmental interference to the optical components, extending the equipment's lifespan, and ensuring measurement reliability. The reflective surfaces of the first reflector 6 and the second reflector 7 are coated with a high-reflectivity coating to reduce light energy loss, increase light signal intensity, and thus improve measurement accuracy.

[0034] Although some preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0035] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A laser measuring device suitable for large size parts, provided on the laser light path of a laser transmitter, characterized in that: The application relates to a laser screen detection device, which comprises at least two groups of mirror assemblies, a combined lens, and a CCD imaging unit arranged in sequence along a laser emission direction; the mirror assemblies are symmetrically distributed around an optical axis and comprise two mirrors arranged in parallel and oppositely set to reflect a large-size light curtain to the combined lens; the combined lens comprises a convex lens and a meniscus lens to converge and gather the light curtain to the CCD imaging unit; and the CCD imaging unit comprises a photosensitive element to receive a light signal and convert it into an electric signal.

2. The laser measuring device for large size parts according to claim 1, characterized in that: The mirror assembly comprises a first mirror and a second mirror arranged in parallel, the first mirror is arranged at an angle of 45 degrees inwardly to the incident laser beam to reflect the laser beam to the direction of the second mirror, and the second mirror is arranged on the inner side of the first mirror to reflect the laser beam to the combined lens.

3. The laser measuring device for large size parts according to claim 1, characterized in that: The mirror assembly is mounted on an angle adjusting mechanism, the angle adjusting mechanism comprises a base, an arc-shaped guide rail is arranged in the base, a sector-shaped sliding block is mounted in the base, an arc-shaped groove matched in shape and position is arranged at the bottom of the sector-shaped sliding block to realize rotation of the sector-shaped sliding block in the base, and a mounting groove is arranged above the sector-shaped sliding block to mount the mirror.

4. The laser measuring device for large size parts according to claim 3, characterized in that: An angle scale is arranged on one side of the sector-shaped sliding block and the base.

5. The laser measuring device for large size parts according to claim 4, characterized in that: A driving structure is mounted on the other side of the sector-shaped sliding block, the driving structure comprises a motor connected to the sector-shaped sliding block through a chain wheel and chain transmission structure.

6. The laser measuring device for large size parts according to claim 2, characterized in that: The reflecting surfaces of the first mirror and the second mirror are coated with a high-reflectivity coating.

7. The laser measuring device for large size parts according to claim 1, characterized in that: The combined lens further comprises at least one aspherical lens for correcting aberration.

8. The laser measuring device for large size parts according to claim 1, characterized in that: The materials of the convex lens and the meniscus lens are low-dispersion optical glass.

9. The laser measuring device for large size parts according to claim 1, characterized in that: The mirror assembly and the combined lens are provided with dustproof protective covers made of transparent material.

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