An apparatus for measuring a part based on laser scanning

Abstract

The utility model relates to the field of precision measurement technique discloses a device based on laser scanning measurement spare part, including base, the upper surface of base is provided with protection box, the inside of protection box is provided with laser emission module, stable scanning module and light beam calibration module, stable scanning module includes bearing plate, the upper surface rotationally connected with lower turntable of bearing plate. This one kind is based on laser scanning measurement spare part's device, through setting up stable scanning module, in the process of using, drive motor is not with the prism body direct fixed under the condition that can drive prism body to rotate, cooperation fixed plate and the damper rod installed between protection box, when the motor appears the vibration, reduce the influence of vibration to prism body, make prism body still can maintain stable under the condition of high -speed rotation, avoid the problem that the reflected laser beam appears not parallel, position dithering.

Description

Technical Field

[0001] This utility model relates to the field of precision measurement technology, specifically a device for measuring components based on laser scanning. Background Technology

[0002] In the field of component measurement, laser scanning technology is widely used due to its advantages such as non-contact operation and fast response. Existing laser scanning-based measurement devices typically use a laser tube to emit a beam, which is then collimated by a collimating lens to form a parallel beam. The beam is then reflected by a regular polygonal prism to achieve scanning. After passing through a reflector, collimating lens, and focusing lens, the beam is focused onto a receiving photosensitive element. The component dimensions are calculated by analyzing the time difference in which the light signal is blocked.

[0003] Existing laser scanning-based measurement devices have certain shortcomings in use. As a component that reflects light, the prism requires a specific number of reflective surfaces to determine the maximum scanning angle θ and scanning frequency of the scanning line. At the same time, the prism needs to rotate at a specific speed. Therefore, the prism needs to be connected to a driving device, which drives the prism to rotate. As a moving unit, the prism is prone to mechanical vibration during rotation, which can cause problems such as non-parallelism and positional jitter of the reflected laser beam, directly affecting the scanning accuracy. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a device based on laser scanning measurement components, which has the advantage of stable scanning and solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device based on laser scanning measurement components, comprising a base, a protective box being provided on the upper surface of the base, and a laser emission module, a stable scanning module, and a beam calibration module being provided inside the protective box;

[0006] The stable scanning module includes a support plate, a lower turntable rotatably connected to the upper surface of the support plate, a prism body disposed on the upper surface of the lower turntable, a lower pressure plate disposed above the support plate, an upper turntable rotatably connected to the bottom surface of the lower pressure plate, the upper turntable being located above the prism body, a vertical rod fixed to the upper surface of the support plate, the vertical rod penetrating the lower pressure plate, fastening bolts installed on the outer surface of the vertical rod, a fixing plate fixed to the side of the support plate, and a damping rod installed between the fixing plate and the protective box.

[0007] Furthermore, the inner bottom wall of the protective box is fixed with multiple insert rods that penetrate the bearing plate. A drive motor is installed on the inner bottom wall of the protective box. A rectangular insert block is fixed at the output end of the drive motor. A corresponding slot is fixed on the bottom surface of the lower turntable. The length of the rectangular insert block inserted into the slot is 1 / 2 of the slot depth.

[0008] The above solution ensures that the motor output is not directly fixed to the prism body. In conjunction with the damping rod installed between the fixing plate and the protective box, the impact of motor vibration on the prism body is reduced when the motor vibrates.

[0009] Furthermore, a rectangular limiting rod is fixed on the upper surface of the center position of the lower turntable, and the rectangular limiting rod passes through the prism body and is inserted into the upper turntable.

[0010] The above scheme enables the rotation of the lower turntable to drive the prism body and the upper turntable to rotate synchronously.

[0011] Furthermore, the laser emitting module includes a semiconductor laser tube installed on the side of the protective box. One end of the semiconductor laser tube is connected to an external laser generator, and the other end of the semiconductor laser tube is equipped with a first collimating lens, which is aligned with the prism body.

[0012] With the above scheme, the light beam is transformed into a parallel beam by the semiconductor laser tube and the first collimating lens, and then shines on the prism body.

[0013] Furthermore, the beam calibration module includes a reflector and a collimating lens group. A bracket is installed on the inner bottom wall of the protective box, and the reflector is installed on the upper surface of the bracket. The collimating lens group includes a first mounting tube installed on the side of the protective box, and two second collimating lenses are installed on the inner wall of the first mounting tube.

[0014] The above scheme directs the beam reflected by the prism to the collimating lens group. The two second collimating lenses in the collimating lens group calibrate all scanning beams into mutually parallel beams, ensuring that the beams remain parallel within the scanning range.

[0015] Furthermore, a first protective mirror is installed at both ends of the collimating lens group, and the first protective mirror is a plano lens.

[0016] The above solution protects the second collimating lens inside the first mounting tube with the first protective lens, while preventing dust from entering the first mounting tube.

[0017] Furthermore, a protective box is provided on the upper surface of the base, and a focusing receiving module is provided inside the protective box. The focusing receiving module includes a second mounting tube installed on the side of the protective box, a focusing lens installed inside the second mounting tube, a receiving photosensitive element installed at the left end of the second mounting tube, and a second protective mirror installed at the right end of the second mounting tube. A data processing module is installed on the inner bottom wall of the protective box, and the receiving photosensitive element and the data processing module are connected by a cable.

[0018] The above scheme focuses the parallel scanning beam onto the photosensitive surface of the receiving photosensitive element, ensuring that the beam is continuously received when there is no obstruction. The electrical signal output by the receiving photosensitive element is processed by the high-speed amplification circuit and then transmitted to the data processing module.

[0019] Furthermore, a sliding groove is provided on the upper surface of the base, and a slider is fixed on the bottom surface of the protective box and the protective housing, and the slider is slidably connected to the sliding groove.

[0020] The above method allows for the calibration of the installation positions of the protective box and protective housing via a sliding groove.

[0021] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0022] This device, based on laser scanning measurement components, incorporates a stable scanning module. During use, the drive motor, while capable of rotating the prism body, is not directly fixed to it. In conjunction with the damping rod installed between the fixing plate and the protective box, the impact of motor vibration on the prism body is reduced, ensuring the prism body remains stable even at high speeds and preventing issues such as non-parallelism and positional jitter in the reflected laser beam. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present application;

[0024] Figure 2 This is a diagram of the internal structure of the overall protective enclosure in this application;

[0025] Figure 3 This is a structural diagram of the overall stable scanning module of this application;

[0026] Figure 4 This is a sectional view of the side view of the overall prism body of this application;

[0027] Figure 5 This is a sectional view of the first mounting pipe side view of the entire application;

[0028] Figure 6 This is a diagram of the internal structure of the overall protective box of this application.

[0029] In the picture:

[0030] 1. Base; 2. Protective case;

[0031] 3. Laser emitting module; 301. Semiconductor laser tube; 302. First collimating lens;

[0032] 4. Stabilized scanning module; 401. Bearing plate; 402. Lower turntable; 403. Prism body; 404. Lower pressure plate; 405. Upper turntable; 406. Vertical rod; 407. Fastening bolt; 408. Fixing plate; 409. Damping rod; 410. Insert rod; 411. Drive motor; 412. Rectangular insert block; 413. Slot; 414. Rectangular limit rod;

[0033] 5. Beam calibration module; 501. Reflector; 502. Collimating lens group; 503. Bracket; 504. First mounting tube; 505. Second collimating lens; 506. First protective lens;

[0034] 6. Protective box;

[0035] 7. Focusing receiver module; 701. Second mounting tube; 702. Focusing lens; 703. Receiver photosensitive element; 704. Second protective lens; 705. Data processing module;

[0036] 8. Slide groove. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] Please see Figure 1 , Figure 2 and Figure 3 The device based on laser scanning measurement components in this embodiment includes a base 1, a protective box 2 is provided on the upper surface of the base 1, and a laser emission module 3, a stable scanning module 4 and a beam calibration module 5 are provided inside the protective box 2.

[0039] Please see Figure 2 , Figure 3 and Figure 4The stable scanning module 4 includes a support plate 401, a lower turntable 402 rotatably connected to the upper surface of the support plate 401, a prism body 403 disposed on the upper surface of the lower turntable 402, a lower pressure plate 404 disposed above the support plate 401, an upper turntable 405 rotatably connected to the bottom surface of the lower pressure plate 404, the upper turntable 405 being located above the prism body 403, a vertical rod 406 fixed to the upper surface of the support plate 401, the vertical rod 406 penetrating the lower pressure plate 404, a fastening bolt 407 installed on the outer surface of the vertical rod 406, a fixing plate 408 fixed to the side of the support plate 401, and a damping rod 409 installed between the fixing plate 408 and the protective box 2.

[0040] Please see Figure 2 , Figure 3 and Figure 4 Multiple insert rods 410 are fixed to the inner bottom wall of the protective box 2. The insert rods 410 penetrate the bearing plate 401. A drive motor 411 is installed on the inner bottom wall of the protective box 2. A rectangular insert block 412 is fixed to the output end of the drive motor 411. A corresponding slot 413 is fixed to the bottom surface of the lower turntable 402. The length of the rectangular insert block 412 inserted into the slot 413 is 1 / 2 of the depth of the slot 413, so that the output end of the motor is not directly fixed to the prism body 403. With the damping rod 409 installed between the fixing plate 408 and the protective box 2, when the motor vibrates, the impact of vibration on the prism body 403 is reduced. A rectangular limiting rod 414 is fixed to the upper surface of the center position of the lower turntable 402. The rectangular limiting rod 414 penetrates the prism body 403 and is inserted into the upper turntable 405, so that the rotation of the lower turntable 402 can drive the prism body 403 and the upper turntable 405 to rotate synchronously.

[0041] Please see Figure 2 , Figure 3 and Figure 5 The laser emitting module 3 includes a semiconductor laser tube 301 installed on the side of the protective box 2. One end of the semiconductor laser tube 301 is connected to an external laser generator, and the other end of the semiconductor laser tube 301 is equipped with a first collimating lens 302. The first collimating lens 302 is aligned with the prism body 403. The beam passes through the semiconductor laser tube 301 and the first collimating lens 302 to become a parallel beam and illuminate the prism body 403. The beam calibration module 5 includes a reflector 501 and a collimating lens group 502. A bracket 503 is installed on the inner bottom wall of the protective box 2. The reflector 501 is installed on the upper surface of the bracket 503. The collimating lens group 502 includes a first mounting tube 504 installed on the side of the protective box 2. Two second collimating lenses 505 are installed on the inner wall of the first mounting tube 504. The reflector 501 directs the beam reflected by the prism to the collimating lens group 502. The two second collimating lenses 505 in the collimating lens group 502 calibrate all scanning beams into mutually parallel beams to ensure that the beams remain parallel within the scanning range.

[0042] Please see Figure 1 , Figure 2 and Figure 6 The collimating lens group 502 has first protective lenses 506 installed at both ends. The first protective lenses 506 are plano lenses, which protect the second collimating lens 505 inside the first mounting tube 504 and prevent dust from entering the first mounting tube 504. A protective box 6 is provided on the upper surface of the base 1. The focusing receiving module 7 is provided inside the protective box 6. The focusing receiving module 7 includes a second mounting tube 701 installed on the side of the protective box 6. The focusing lens 702 is installed inside the second mounting tube 701. A photosensitive element 703 is installed at the left end of the second mounting tube 701. The right end of the second mounting tube 701 is... A second protective mirror 704 is installed at the end. A data processing module 705 is installed on the inner bottom wall of the protective box 6. The receiving photosensitive element 703 is connected to the data processing module 705 via a cable. The focusing lens 702 focuses the parallel scanning beam onto the photosensitive surface of the receiving photosensitive element 703 to ensure that the beam is continuously received when there is no obstruction. The electrical signal output by the receiving photosensitive element 703 is processed by a high-speed amplification circuit and then transmitted to the data processing module 705. A sliding groove 8 is provided on the upper surface of the base 1. A slider is fixed on the bottom surface of the protective box 2 and the protective box 6. The slider is slidably connected to the sliding groove 8. The installation position of the protective box 2 and the protective box 6 can be calibrated through the sliding groove 8.

[0043] It should be noted that during use, the positions of the protective box 2 and the protective housing 6 can be adjusted according to the actual size of the object being measured.

[0044] The working principle of the above embodiment is as follows: When in use, firstly, the protective box 2 and the protective case 6 are moved according to the size of the object to be measured. The external laser generator and the drive motor 411 are started. The drive motor 411 drives the rectangular plug 412 to rotate. The rotation of the rectangular plug 412 drives the slot 413 to rotate. The rotation of the slot 413 drives the lower turntable 402 to rotate. The rotation of the lower turntable 402 can drive the prism body 403 and the upper turntable 405 to rotate synchronously. The length of the rectangular plug 412 inserted into the slot 413 is 1 / 2 of the depth of the slot 413, so that the output end of the motor is not directly fixed to the prism body 403 while driving the prism body 403 to rotate. When the motor vibrates, the vibration is transmitted to the damping rod 409. The damping rod 409 reduces the impact of the vibration on the prism body 403, so that the prism body 403 can rotate at high speed and stably.

[0045] The light beam emitted by the external laser generator is converted into a parallel beam by the first collimating lens 302 through the semiconductor laser tube 301 and illuminates the prism body 403. After being reflected by the prism, it is directed to the reflector 501. The reflector 501 directs the light beam reflected by the prism to the collimating lens group 502. The two second collimating lenses 505 in the collimating lens group 502 calibrate all scanning beams into mutually parallel beams, ensuring that the beams remain parallel within the scanning range. After passing through the second collimating lens 505, the light illuminates the focusing receiving module 7. The focusing lens 702 focuses the parallel scanning beam onto the photosensitive surface of the receiving photosensitive element 703, ensuring that the beam is continuously received when there is no obstruction. The electrical signal output by the receiving photosensitive element 703 is processed by the high-speed amplification circuit and then transmitted to the data processing module 705.

[0046] When there are no components in the parallel beam region, the receiving optical element will continuously receive a signal for a duration of t0. The straight-line width of the parallel beam scanning region is l0. If there are components in the parallel beam region, because part of the parallel beam is blocked by the object, the signal will be interrupted during t0. 01 The receiving element cannot receive the beam until t 02 The scanning beam enters the receiving element from the other side of the object. The electrical signal converted from the optical signal received by the receiving element is shown in the figure below. The width of the interface between the component and the parallel beam can be estimated as l = l0 × (t). 02 -t 01 ) / t0.

[0047] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring components based on laser scanning, comprising a base (1), characterized in that: The upper surface of the base (1) is provided with a protective box (2), and the inside of the protective box (2) is provided with a laser emission module (3), a stable scanning module (4) and a beam calibration module (5). The stable scanning module (4) includes a support plate (401), a lower turntable (402) is rotatably connected to the upper surface of the support plate (401), a prism body (403) is provided on the upper surface of the lower turntable (402), a lower pressure plate (404) is provided above the support plate (401), an upper turntable (405) is rotatably connected to the bottom surface of the lower pressure plate (404), the upper turntable (405) is located above the prism body (403), a vertical rod (406) is fixed on the upper surface of the support plate (401), the vertical rod (406) passes through the lower pressure plate (404), a fastening bolt (407) is installed on the outer surface of the vertical rod (406), a fixing plate (408) is fixed on the side of the support plate (401), and a damping rod (409) is installed between the fixing plate (408) and the protective box (2).

2. The device for measuring components based on laser scanning according to claim 1, characterized in that: The inner bottom wall of the protective box (2) is fixed with a plurality of insert rods (410), the insert rods (410) penetrate the bearing plate (401), the inner bottom wall of the protective box (2) is equipped with a drive motor (411), the output end of the drive motor (411) is fixed with a rectangular insert block (412), the bottom surface of the lower turntable (402) is fixed with a corresponding slot (413), and the length of the rectangular insert block (412) inserted into the slot (413) is 1 / 2 of the depth of the slot (413).

3. The device for measuring components based on laser scanning according to claim 1, characterized in that: A rectangular limiting rod (414) is fixed on the upper surface of the center position of the lower turntable (402). The rectangular limiting rod (414) passes through the prism body (403) and is inserted into the upper turntable (405).

4. The device for measuring components based on laser scanning according to claim 1, characterized in that: The laser emitting module (3) includes a semiconductor laser tube (301) installed on the side of the protective box (2). One end of the semiconductor laser tube (301) is connected to an external laser generator, and the other end of the semiconductor laser tube (301) is equipped with a first collimating lens (302), which is aligned with the prism body (403).

5. The device for measuring components based on laser scanning according to claim 1, characterized in that: The beam calibration module (5) includes a reflector (501) and a collimating lens group (502). A bracket (503) is installed on the inner bottom wall of the protective box (2). The reflector (501) is installed on the upper surface of the bracket (503). The collimating lens group (502) includes a first mounting tube (504) installed on the side of the protective box (2). Two second collimating lenses (505) are installed on the inner wall of the first mounting tube (504).

6. The device for measuring components based on laser scanning according to claim 5, characterized in that: The collimating lens group (502) has a first protective lens (506) installed at both ends, and the first protective lens (506) is a plano lens.

7. The device for measuring components based on laser scanning according to claim 1, characterized in that: A protective box (6) is provided on the upper surface of the base (1). A focusing receiving module (7) is provided inside the protective box (6). The focusing receiving module (7) includes a second mounting tube (701) installed on the side of the protective box (6). A focusing lens (702) is installed inside the second mounting tube (701). A receiving photosensitive element (703) is installed at the left end of the second mounting tube (701). A second protective mirror (704) is installed at the right end of the second mounting tube (701). A data processing module (705) is installed on the inner bottom wall of the protective box (6). The receiving photosensitive element (703) and the data processing module (705) are connected by a cable.

8. The device for measuring components based on laser scanning according to claim 1, characterized in that: The upper surface of the base (1) is provided with a sliding groove (8), and the bottom surfaces of the protective box (2) and the protective box (6) are fixed with sliders, which are slidably connected to the sliding groove (8).

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