Laser swing measuring instrument with digital display

Abstract

The invention relates to a laser swing measuring instrument with a digital display function, which comprises a body structure formed by connecting a plurality of brackets end to end, a sliding rail and a slidable sliding block bracket assembly are arranged on the body, and a roller mechanism driven by a direct-current gear motor is matched to realize stable support and swing measurement of a measured rod. A first laser instrument and a second laser instrument are arranged on the body, the laser emission intersection of the first laser instrument and the second laser instrument is located in the center of the open groove and is aligned with the center line of the rod to be detected in the V-shaped groove, and therefore high-precision detection of the swing state of the rod piece is achieved. And the digital display module with the display screen is used for displaying, storing and calling the measurement result in real time, so that the device is suitable for swing detection of rod pieces with different outer diameters, and has the advantages of high measurement precision, wide application range, convenience in operation and high data visualization degree.

Description

Technical Field

[0001] This application relates to the field of precision measurement, and in particular to a laser oscillation measuring instrument with digital display. Background Technology

[0002] In industrial fields such as machinery manufacturing, metal processing, wire production, and assembly testing, swaying, bouncing, or eccentricity are common phenomena in the shafts, rods, and tubular components of fishing rods during processing or use. These swaying states directly affect the assembly accuracy, operational stability, and service life of the product; therefore, accurate and intuitive detection of the swaying state of the rods is of great significance.

[0003] Existing methods for detecting the swing or bounce of fishing rods mainly include mechanical contact measurement and simple optical observation measurement. Mechanical contact measurement usually relies on contact sensors such as dial indicators and micrometers. This type of method is prone to introducing additional errors due to contact pressure during the measurement process, and it has high requirements for the surface quality of the measured part. It is not suitable for slender rods with easily damaged surfaces. At the same time, contact measurement is complicated to adjust and has low efficiency when switching between products with multiple specifications and outer diameters.

[0004] Although some existing optical measuring devices have introduced lasers for non-contact detection, most of them are single laser or unidirectional detection structures, which make it difficult to accurately locate the spatial swing state of the rod. Furthermore, the laser emission position is not easy to align with the center line of the rod being measured, resulting in insufficient measurement repeatability and stability. In addition, existing equipment often lacks integrated drive and display control modules, and the measurement results rely on manual observation or external instruments. They do not have the ability to digitally record, save historical data, or adapt to products with multiple outer diameters, resulting in low ease of use and low level of intelligence.

[0005] Therefore, there is an urgent need for a laser oscillation measuring instrument that is compact, has high alignment accuracy, can achieve non-contact measurement, and has digital display and data storage functions, in order to solve the problems of insufficient measurement accuracy, limited applicability, and complex operation in the existing technology. Summary of the Invention

[0006] In order to improve the technical problems in the detection of slender shafts such as fishing rods, this application provides a laser oscillation measuring instrument with digital display.

[0007] The laser oscillation measuring instrument with digital display provided in this application adopts the following technical solution: A laser oscillation measuring instrument with digital display includes a main body, which includes several supports. Four of the supports are connected end to end to form a cuboid, and the length of the support symmetrical at one end is greater than that of the support symmetrical at the other end. The shorter symmetrical brackets are equipped with slider bracket assembly one and slider bracket assembly three at their upper ends, while the longer symmetrical brackets are equipped with slide rails at their upper ends. The shorter stacking support is equipped with a DC geared motor 1 and a DC geared motor 2 at the upper end. The rotating shafts of the DC geared motor 1 and the DC geared motor 2 are equipped with driving rollers, and the driving rollers mesh with the driven rollers at the upper end. A second slider support assembly is placed on two parallel slide rails. The second support assembly has an opening groove in the middle. A first laser instrument is placed at the bottom of the opening groove. A second laser instrument is placed at the upper end of one side of the second support assembly. The laser emission intersection points of the second laser instrument and the first laser instrument are both located at the center of the opening groove. A pole is erected on the outside of the main body, and a control box is installed at the upper end of the pole. The control box has a display screen, and a switch button and a speed adjustment knob are installed on the outside of the display screen. The switch button controls the working mode of the main body, and the speed control knob controls the working mode and speed of the DC geared motor one and the DC geared motor two; The upper end of the upright bracket for mounting DC geared motor 1 and DC geared motor 2 is provided with a V-shaped groove. When the rod to be measured rests on the V-shaped groove, the center line of the rod resting on the V-shaped groove is consistent with the position of the intersection point of the laser emission of laser instrument 2 and laser instrument 1.

[0008] By adopting the above technical solutions, multiple technological improvements have been achieved in terms of structure and function: The cuboid frame structure composed of supports of varying lengths, combined with the slide rail and slider support assembly, allows the laser measurement component to flexibly adjust its position along the axis of the measured rod, adapting to the testing needs of rods of different lengths and outer diameters; the active and driven rollers driven by a DC geared motor provide stable drive or oscillation excitation for the measured rod, ensuring the continuity and repeatability of the rod's movement during measurement; by setting two laser instruments in the slider support assembly and precisely aligning their laser emission convergence point with the centerline of the measured rod in the V-groove, non-contact, high-precision detection of the rod's oscillation deviation is achieved, avoiding the wear and errors associated with traditional contact measurements; the control box integrates a display screen, switch buttons, and speed control knob, allowing for intuitive control of the equipment's operating mode and motor speed, and real-time digital display of measurement results, improving operational convenience and readability; this structure facilitates unified management and comparative analysis of measurement data for products of different specifications, comprehensively improving measurement accuracy, applicability, and testing efficiency, making it suitable for widespread application in industrial production and quality inspection scenarios.

[0009] Optionally, the measurement data for multiple outer diameter products can be displayed and retained.

[0010] By adopting the above technical solution, it is possible to measure products with different outer diameters separately, and automatically display and store the corresponding measurement results. This enables the classification, recording and quick retrieval of measurement data for products of multiple specifications, avoids errors caused by repeated measurements and manual recording, improves the continuity, traceability and overall testing efficiency of the testing process, and is suitable for industrial testing application scenarios with multiple varieties and small batches.

[0011] Optionally, the display screen can be operated via touch.

[0012] By adopting the above technical solution, the display screen has a touch operation function, and the operator can directly complete parameter setting, working mode switching and measurement data viewing and management on the display interface, reducing physical button operation steps, improving the intuitiveness of human-computer interaction and operation efficiency, while reducing the probability of misoperation and improving the overall intelligence and ease of use of the equipment.

[0013] Optionally, the slider bracket assembly one, slider bracket assembly two, and slider bracket assembly three all use rollers to roll in cooperation with the corresponding slide rails to achieve synchronous or independent sliding adjustment along the slide rail direction.

[0014] By adopting the above technical solution, the slider support assembly achieves smooth movement along the slide rail through the rolling cooperation of the rollers and the slide rail. It can be adjusted synchronously or independently according to the length of the rod being measured and the detection position requirements, thereby improving the positioning flexibility and adjustment accuracy of the laser measurement assembly and enhancing the equipment's adaptability to different specifications and detection conditions.

[0015] Optionally, the driving roller and the driven roller are rubber-coated or elastically coated structures to improve the stability of friction transmission and reduce damage to the surface of the rod being tested.

[0016] By adopting the above technical solution, the active roller and the driven roller adopt a rubber-coated or elastic-coated structure, which can provide stable friction when driving the measured rod to move, avoid slippage, and reduce indentation and wear on the surface of the measured rod. This helps to ensure the stability and repeatability of the measurement process and improve the overall measurement accuracy and reliability.

[0017] Optionally, the DC geared motor one and DC geared motor two are reversible motors, and can be driven synchronously or in reverse through a control box to adapt to the swing measurement requirements of the rod under different detection conditions.

[0018] By adopting the above technical solution, the DC geared motor has forward and reverse rotation control capability, and can achieve synchronous or reverse drive through the control box, so that the measured rod can obtain the required rotation or swing mode under different working conditions, flexibly simulate a variety of actual use states, and improve the adaptability, controllability and accuracy of swing measurement and detection results.

[0019] Optionally, the laser instrument one and laser instrument two are line laser or point laser emitters, and their emission angles can be calibrated by the bracket fine-tuning mechanism to ensure that the laser emission intersection point is always located at the geometric center of the opening slot.

[0020] By adopting the above technical solution, the laser instrument can achieve non-contact, high-precision swing measurement of the rod being measured, ensuring that the laser intersection point is always aligned with the center line of the rod, thus improving the accuracy and repeatability of measurement positioning. At the same time, this structure can adapt to rods of different specifications and positions, realize diverse testing needs, ensure reliable and stable measurement data, and provide efficient and accurate technical means for rod quality control and testing in industrial production.

[0021] Optionally, the display screen is used to display at least one of the swing amplitude, swing frequency or offset of the rod being measured in real time, and supports the retrieval and comparison display of historical measurement data.

[0022] By adopting the above technical solution, the display screen can display parameters such as the swing amplitude, swing frequency or offset of the tested rod in real time, enabling the operator to grasp the motion state of the rod immediately. At the same time, the display screen supports the retrieval and comparative analysis of historical measurement data, which helps to conduct trend analysis and quality assessment of the swing characteristics of different batches or different specifications of products, and improves the traceability of the testing process and the efficiency of data management.

[0023] Optionally, the control box is equipped with a data processing module and a storage module, which are used to process the laser measurement signal and classify and store the measurement results of products with different outer diameters.

[0024] By adopting the above technical solution, the data processing module inside the control box can perform real-time calculation and processing of the laser measurement signal, quickly calculate the swing amplitude, frequency or offset of the measured rod, and at the same time, the storage module can classify and save the measurement results of products with different outer diameters, realize the management and retrieval of measurement data of multi-specification products, improve the automation level of the measurement process, data traceability and detection efficiency, facilitate the analysis and comparison of product quality, and enhance the applicability of the equipment in multi-variety and multi-batch testing.

[0025] Optionally, the opening angle of the V-groove is 60° to 120°, and the surface of the V-groove is provided with an anti-slip layer or a buffer layer to improve the stability of the rod being measured during rotation or swinging.

[0026] By adopting the above technical solutions, and by setting an anti-slip or buffer layer in the V-groove and optimizing the opening angle to 60°~120°, the stability of the measured rod during rotation or swing can be significantly improved, lateral sliding and vibration interference can be reduced, measurement accuracy can be guaranteed, the service life of the equipment can be extended, and the reliability and repeatability of the experiment can be improved. It is suitable for precision dynamic measurement scenarios and enhances the overall operational safety and reliability.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The combination of a cuboid frame and a slide rail slider enables flexible adjustment of the laser measurement component along the axis of the rod being measured, adapting to the testing needs of rods of different lengths and outer diameters; 2. The active / driven roller structure driven by a DC geared motor enables stable rotation or oscillation of the measured rod, ensuring continuous and repeatable motion; 3. The intersection point of the two laser beams is precisely aligned with the center of the V-groove, enabling non-contact, high-precision oscillation detection and reducing contact wear and measurement errors; 4. The control box integrates display, operation and speed adjustment functions, improving the ease of operation and data readability, and supports touch control, human-computer interaction and historical data retrieval; 5. It can classify, store, and automatically display measurement data of products with multiple specifications and outer diameters, improving testing efficiency, traceability, and continuity; 6. The slider bracket rollers, in conjunction with the slide rail, enable synchronous or independent adjustment, enhancing positioning flexibility and measurement accuracy; 7. The driving / driven rollers are coated with rubber or elastic material to improve frictional stability and reduce damage to the rod surface; 8. The motor can rotate in both forward and reverse directions, as well as be synchronously / reversely driven, to adapt to various oscillating conditions; 9. The laser instrument can finely adjust the emission angle to ensure that the intersection point is aligned with the center of the pole, thereby improving the accuracy of measurement and positioning; 10. The V-groove optimizes the opening angle and is equipped with an anti-slip or buffer layer to improve the stability of the measured rod during rotation or swing, ensuring measurement accuracy and safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 20. Main body; 1. Bracket; 2. Slider bracket assembly one; 3. Slider bracket assembly two; 4. Slider bracket assembly three; 5. Slide rail; 6. DC geared motor one; 7. DC geared motor two; 8. Driving roller; 9. Driven roller; 10. Switch button; 11. Speed ​​control knob; 12. Display screen; 13. Control box; 14. Laser instrument one; 15. Laser instrument two. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0031] This application discloses a laser oscillation measuring instrument with a digital display. (Refer to...) Figure 1 The body 20 includes a number of supports 1. The four supports 1 are connected end to end to form a cuboid. The length of the support 1 symmetrical at one end is greater than that of the support 1 symmetrical at the other end. The shorter symmetrical bracket 1 is provided with slider bracket assembly 1 2 and slider bracket assembly 3 4 at its upper end, and the longer symmetrical bracket 1 is provided with slide rail 5 at its upper end. The shorter stacking support 1 is equipped with a DC geared motor 6 and a DC geared motor 7 at the upper end. The rotating shafts of the DC geared motor 6 and the DC geared motor 7 are equipped with driving rollers 8, and the driving rollers 8 mesh with the driven rollers 9 at the upper end. A second slider support assembly 3 is placed on two parallel slide rails 5. The second support assembly 3 has an opening groove in the middle. A first laser instrument 14 is placed at the bottom of the opening groove. A second laser instrument 15 is placed at the upper end of one side of the second support assembly 3. The laser emission intersection points of the second laser instrument 15 and the first laser instrument 14 are both located at the center of the opening groove. A pole is erected on the outside of the main body 20, and a control box 13 is provided at the upper end of the pole. The control box 13 has a display screen 12, and a switch button 10 and a speed adjustment knob 11 are provided on the outside of the display screen 12. The switch button 10 controls the working mode of the main body 20, and the speed control knob 11 controls the working mode and speed of the DC geared motor 6 and the DC geared motor 7. The upper end of the upright bracket for mounting DC geared motor 6 and DC geared motor 7 is provided with a V-groove. When the rod to be measured is placed in the V-groove, the center line of the rod placed in the V-groove is consistent with the position of the laser emission intersection point of laser instrument 2 15 and laser instrument 14. The main body 20 adopts a cuboid support frame structure, combined with a slide rail and slider support assembly, allowing the laser measurement component to be flexibly adjusted along the axis of the rod being measured, adapting to rods of different lengths and outer diameters. Stable rotation or oscillation of the rod being measured is achieved through active and driven rollers driven by a DC geared motor, ensuring continuous and repeatable motion. The emission intersection point of the two laser instruments is precisely aligned with the center line of the rod being measured in the V-groove, achieving non-contact, high-precision oscillation measurement and avoiding wear and errors caused by contact. The control box integrates a display screen, switch buttons, and speed control knob, which can display measurement results in real time and adjust the motor's operating status, improving operational convenience and readability. Simultaneously, the V-groove design ensures the stability of the rod placement, comprehensively improving measurement accuracy, applicability, and operational reliability, making it suitable for precise dynamic testing in industrial and scientific research applications, such as fishing rods or other slender rods.

[0032] Example 1 Example 1 uses a fishing rod as the test object and employs the digital display laser oscillation measuring instrument disclosed in this application for testing. First, the fishing rod is placed horizontally in the V-shaped grooves at both ends of the main body 20, so that the center line of the fishing rod is precisely aligned with the intersection point of the laser emission of laser instrument 14 and laser instrument 25. Based on the length of the fishing rod, the axial position of the slider bracket assembly 23 along the slide rail 5 is adjusted to ensure that the laser measuring assembly can cover the entire length of the fishing rod. The control box 13 is activated, and the speed and forward / reverse mode of DC geared motor 6 and DC geared motor 7 are set via the speed control knob 11, causing the fishing rod to rotate slowly or produce a controllable swing on the rod body. Simultaneously, the active roller 8 and driven roller 9 provide stable drive, ensuring continuous and repeatable motion. Laser instruments 14 and 15 collect the swing amplitude, frequency, and offset of the fishing rod in real time, and display them digitally on the display screen 12. Operators can retrieve historical measurement data for comparative analysis as needed to evaluate the dynamic characteristics and performance consistency of the fishing rod. The V-groove anti-slip or buffer structure effectively maintains the stability of the fishing rod during rotation or swing, reducing lateral slippage and vibration interference, and improving measurement accuracy and reliability. This embodiment is applicable to fishing rods of different lengths and outer diameters, enabling high-precision, non-contact dynamic swing measurement. It can also record and manage measurement data from multiple fishing rods, providing a reliable and convenient technical means for industrial production or scientific research testing.

[0033] Example 2 Example 2 involves batch measurement of multiple fishing rods of different lengths and outer diameters. Each fishing rod is placed horizontally in the V-shaped grooves at both ends of the main body 20, so that the center line of the fishing rod is aligned with the intersection point of the laser emission of laser instrument 14 and laser instrument 25. According to the length of the fishing rod, the position of the laser measuring component is adjusted along the axis of the slide rail 5 by the slider bracket assembly 23 to ensure that the laser can cover the entire length of the fishing rod. The control box 13 sets the speed and forward / reverse mode of DC geared motor 6 and DC geared motor 7, so that the fishing rod can slowly rotate or swing controllably along the horizontal axis. The rubber-coated structure of the active roller 8 and the driven roller 9 provides stable friction, ensuring the continuity and repeatability of the movement of each fishing rod during rotation or swing. Laser instrument 14 and laser instrument 25 measure the swing amplitude, frequency and offset in real time. The data processing module inside the control box 13 performs real-time calculation on the measurement signals and classifies and stores the measurement results of fishing rods with different outer diameters. The display screen 12 can display the measurement parameters of each fishing rod in real time and supports historical data retrieval and comparative analysis, enabling operators to quickly judge the dynamic performance and consistency of the rod. The anti-slip or buffer layer structure of the V-groove ensures that the fishing rod remains stable during swinging or rotation, reducing lateral sliding and vibration interference, and improving measurement accuracy and reliability. This embodiment is suitable for high-precision, non-contact dynamic swing measurement of fishing rods of multiple specifications and batches, realizing automatic recording and management of measurement data, and providing efficient and reliable technical means for industrial production, quality inspection and scientific research analysis.

[0034] Example 3 Example 3 is for intelligent dynamic measurement of fishing rods of various specifications. The fishing rod to be tested is placed horizontally in the V-groove of the main body 20, so that the center line of the fishing rod is aligned with the intersection point of the laser emission of laser instrument 14 and laser instrument 25. According to the length and outer diameter of the fishing rod, the position of the laser measuring component is adjusted along the slide rail 5 by the slider bracket assembly 23 to ensure that the laser covers the entire rod body. Operators can complete parameter settings through the touch screen 12 on the control box 13, including selecting the measurement mode, setting the motor speed, forward and reverse rotation and synchronous or reverse drive mode, so as to realize the fishing rod to rotate slowly or produce controllable swing. The DC geared motor 6 and DC geared motor 7 drive the fishing rod stably through the active roller 8 and the driven roller 9 to ensure the continuity and repeatability of the movement. At the same time, the rubber or elastic coating structure reduces the wear on the rod surface. Laser instrument 14 and laser instrument 2 15 collect swing amplitude, frequency and offset in real time, and process them through the data processing module inside the control box 13. The measurement results can be automatically classified and stored for fishing rods with different outer diameters. The touch screen supports historical data retrieval and comparative analysis, enabling quick viewing and management of measurement data for multiple product specifications. The V-groove anti-slip or buffer design ensures the stability of the fishing rod during rotation or swing, reduces lateral sliding and vibration interference, and improves measurement accuracy and reliability.

[0035] Example 4 Example 4 is used to measure the dynamic characteristics of a fishing rod under different swing modes. The fishing rod to be tested is placed horizontally in the V-groove of the main body 20, so that the center line of the fishing rod is aligned with the intersection point of the laser emission of laser instrument 14 and laser instrument 25. According to the length and outer diameter of the fishing rod, the position of the laser measuring component is adjusted along the slide rail 5 by the slider bracket assembly 23, so that the laser covers the entire rod. The control box 13 sets the forward and reverse rotation modes and speeds of DC geared motor 6 and DC geared motor 7, enabling the fishing rod to move in different axial rotation or swing modes, including unidirectional rotation, reciprocating swing, synchronous forward and reverse swing, or alternating reverse swing, to simulate the dynamic loads that the fishing rod may bear in actual use. The driving roller 8 and driven roller 9 provide stable drive, and the rubber or elastic coating structure reduces damage to the rod surface, ensuring continuous and repeatable movement. Laser instrument 14 and laser instrument 2 15 monitor the swing amplitude, frequency and offset of the fishing rod in real time, and perform calculation and analysis through the data processing module inside the control box 13. The measurement results are displayed on the display screen 12 in real time, and historical data can be recalled and compared. This facilitates the dynamic response of the fishing rod under different swing modes. The V-groove anti-slip or buffer structure ensures the stability and reliability of the rod during swing, reduces lateral sliding and vibration interference, and improves measurement accuracy.

[0036] The implementation principle of a laser oscillation measuring instrument with digital display in this application embodiment is as follows: by constructing a cuboid frame composed of supports of different lengths, and combining a parallel slide rail and a slider support assembly, the laser measuring component can be flexibly adjusted along the axis of the rod being measured to adapt to the measurement needs of rods of different lengths and outer diameters. The test rod is placed in a V-groove, with its centerline precisely aligned with the intersection point of the two laser instruments, enabling non-contact, high-precision swing measurement. A DC geared motor-driven active and driven roller structure stably drives the test rod to rotate or swing. The rubber or elastically coated rollers reduce damage to the rod's surface, ensuring continuous and repeatable motion. The laser instruments collect the rod's swing amplitude, frequency, and offset in real time. The data processing module in the control box performs signal calculations and result analysis, displaying the data digitally on a screen, supporting historical data retrieval and comparative analysis. By adjusting the motor's forward / reverse, synchronous, or reverse drive modes, measurements can be taken under different swing or rotation conditions, simulating the dynamic characteristics under actual use. The V-groove's anti-slip or buffer structure ensures the rod's stability and reliability during rotation or swing, reducing lateral slippage and vibration interference, and improving measurement accuracy and operational safety.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser wobble measuring instrument with digital display, characterized by: The application relates to a kind of laser swing measuring devices, including body (20), the body (20) includes several supports (1), four supports (1) are fixed to form a cuboid, the length of symmetric support (1) at one end is greater than that of symmetric support (1) at the other end; The upper end of shorter symmetric support (1) is respectively provided with sliding block support assembly one (2) and sliding block support assembly three (4), and the upper end of longer symmetric support (1) is provided with sliding rail (5); The upper end of shorter stack support (1) is respectively provided with DC speed reducer one (6) and DC speed reducer two (7), the rotating shaft of DC speed reducer one (6) and DC speed reducer two (7) is provided with driving roller (8), and the driving roller (8) is engaged with driven roller (9) at the upper end; Sliding block support assembly two (3) is arranged on the parallel two sliding rails (5), the middle of the support assembly two (3) is provided with an open slot, the bottom of the open slot is provided with laser instrument one (14), the upper end of one side of the support assembly two (3) is provided with laser instrument two (15), and the laser emission intersection of laser instrument two (15) and laser instrument one (14) is located at the center position of the open slot; The outer side of the body (20) is provided with a vertical rod, and the upper end of the vertical rod is provided with a control box (13), the control box (13) is provided with a display screen (12), the outer side of the display screen (12) is provided with a switch button (10) and a speed regulating knob (11); The switch button (10) controls the working mode of the body (20), and the speed regulating knob (11) controls the working mode and speed of the DC speed reducer one (6) and the DC speed reducer two (7); The upper end of the vertical support on which the DC speed reducer one (6) and the DC speed reducer two (7) are arranged is provided with a V-shaped groove, when the measured rod is placed in the V-shaped groove, the center line of the rod placed in the V-shaped groove is consistent with the laser emission intersection of the laser instrument two (15) and the laser instrument one (14).

2. The detection instrument of the laser swing measuring instrument with digital display according to claim 1, characterized in that: The display retains the measurement data of various outer diameter products.

3. The detection instrument of the laser swing measuring instrument with digital display according to claim 1, characterized in that: The display screen (12) can be touch-operated.

4. The laser swing measuring instrument with digital display according to claim 1, characterized in that: The sliding block support assembly one (2), the sliding block support assembly two (3) and the sliding block support assembly three (4) are rolled with the corresponding sliding rails (5) to realize synchronous or independent sliding adjustment along the sliding rail direction.

5. The laser swing measuring instrument with digital display according to claim 1, characterized in that: The driving roller (8) and the driven roller (9) are rubber-coated or elastic-coated to improve the stability of friction transmission and reduce the damage to the surface of the measured rod.

6. The laser swing measuring instrument with digital display according to claim 1, characterized in that: The DC speed reducer one (6) and the DC speed reducer two (7) are reversible motors, and synchronous driving or reverse driving is realized through the control box (13) to adapt to the swing measurement requirements of the measured rod under different detection conditions.

7. The laser swing measuring instrument with digital display according to claim 1, characterized in that: The laser instrument one (14) and the laser instrument two (15) are linear laser or point laser emitters, and the emission angles of the two can be calibrated through the support fine adjustment mechanism to ensure that the laser emission intersection is always located at the geometric center of the open slot.

8. The laser swing measuring instrument with digital display according to claim 1 or 3, characterized in that: The display screen (12) is used for real-time display of at least one parameter of the swing amplitude, swing frequency or offset of the measured rod, and supports calling and contrast display of historical measurement data.

9. The laser swing measuring instrument with digital display according to any one of claims 1-3, characterized in that: The control box (13) is internally provided with a data processing module and a storage module, which are used for operating and processing the laser measurement signals and classifying and storing the measurement results of different outer diameter measured products.

10. The laser swing measuring instrument with digital display according to claim 1, characterized in that: The opening angle of the V-shaped groove is 60-120 degrees, and the V-shaped groove surface is provided with an anti-skid layer or a buffer layer to improve the stability of the measured rod in the rotating or swinging process.

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