Motor stator and rotor static magnetic multi-dimensional shape and position analysis and evaluation method and device

Abstract

The invention discloses a motor stator and rotor magnetostatic multi-dimensional shape and position analysis and evaluation method and device, and the method comprises the steps: fixing a motor stator in a magnetostatic state, employing a four-quadrant orthogonal loading mechanism, manually applying an axial / radial combined load to a rotor, simulating the load of the motor in actual work, fixedly connecting a laser to the output shaft of the rotor, and carrying out the measurement of the output shaft of the rotor. And the laser is used for imaging on the photosensitive imaging plate and drawing the rotating track of the rotor. For the load in each direction, the inclination angle theta i of the stator and the rotor of the motor is calculated according to the laser imaging track; and according to the time difference and the position difference of the laser imaging points before and after the load is applied, the axial offset delta Xi and the radial eccentric distance delta Yi are calculated. The system performs statistical processing on four-direction load data through an adaptive weighting algorithm, and outputs a form and position deviation mean value # imgabs0 # # imgabs1 # to establish a method for evaluating the form and position of the stator and the rotor of the motor. According to the invention, high-precision synchronous detection of the multi-dimensional form and position deviation of the stator and the rotor is creatively realized in a static magnetic state.

Description

Technical Field

[0001] The present invention relates to the technical field of motor mechanical faults, and in particular to a method and device for static magnetic multi-dimensional position analysis and evaluation of a motor stator and rotor. Background Art

[0002] Unqualified motor installation quality and damaged motor bearings are the most common mechanical faults of motors, which can cause the stator and rotor of the motor to be misaligned, resulting in noise, or the stator and rotor rubbing against each other, leading to winding damage. Therefore, the evaluation of motor mechanical faults mainly focuses on evaluating the coaxiality of the stator and rotor.

[0003] Currently, the methods and devices for evaluating the coaxiality of a motor stator and rotor can only be realized when the motor is in a starting state, and the starting conditions of the motor are complex and stringent. For some occasions where the motor starting conditions are not available, it is difficult to evaluate the coaxiality of the motor stator and rotor. Moreover, such evaluation methods and devices are complex in operation, time-consuming, and difficult to give quantitative results, and cannot accurately evaluate the true state of the motor.

[0004] With the increasing requirements of Industry 4.0 for the reliability of motor systems, the detection of stator-rotor coaxiality has become a core indicator in the quality control and pre-maintenance systems. Research shows that 68% of motor mechanical faults are due to hidden misalignment formed during the assembly stage, which can cause pre-damage to the bearings under static working conditions, shortening the motor life by more than 40%. Traditional vibration analysis methods (ISO10816 standard) have three major technical bottlenecks: First, they rely on the rotating magnetic field formed by the energized motor and cannot detect static assembly errors; second, they need to cooperate with a high-precision encoder (≥17bit) to build a closed-loop control system, resulting in a high equipment complexity; third, existing detection schemes based on acceleration sensors (such as laser Doppler vibrometry) can only obtain one-dimensional frequency domain characteristics and are difficult to establish a quantitative mapping relationship of the spatial pose. Summary of the Invention

[0005] The present invention provides a method and device for static magnetic multi-dimensional position analysis and evaluation of a motor stator and rotor, which innovatively realizes high-precision detection of the position offset of the stator and rotor under non-energized static magnetic conditions of the motor. Compared with traditional vibration or electrical detection methods, this technology avoids the difficulties of energizing the motor, especially in explosion-proof environments, as well as power interference problems, has a wider range of applications, is more convenient for detection, and has higher precision.

[0006] In the first aspect, the present invention provides a method for static magnetic multi-dimensional position analysis and evaluation of a motor stator and rotor, which includes the following steps:

[0007] Under static magnetic conditions, fix the motor stator, apply an axial / radial composite load to the rotor to simulate the load of the motor during actual operation, fixedly connect a laser to the output shaft of the rotor, and the laser forms an image on the photosensitive imaging plate;

[0008] Based on the laser imaging trajectory, imaging time difference, and imaging position difference, the system performs statistical processing on the four-direction load data through an adaptive weighting algorithm, calculates the three-dimensional deformation parameters of the motor rotor, and realizes the quantitative analysis and evaluation of the shape and position deviation.

[0009] In a second aspect, the present invention provides a static magnetic multi-dimensional shape and position analysis and evaluation device for a motor stator and rotor, which includes

[0010] A pressure loading device that fixes the motor stator in a static magnetic state and applies an axial / radial composite load to the rotor to simulate the load of the motor during actual operation;

[0011] A trajectory acquisition device, which includes two parts: a laser and a photosensitive imaging plate. The laser is fixedly connected to the output shaft of the rotor, and the laser forms an image on the photosensitive imaging plate;

[0012] An evaluation device for performing statistical processing on the four-direction load data through an adaptive weighting algorithm according to the laser imaging trajectory, imaging time difference, and imaging position difference, calculating the three-dimensional deformation parameters of the motor rotor, and realizing the quantitative analysis and evaluation of the shape and position deviation.

[0013] The present invention obtains the following beneficial effects:

[0014] (1) Compared with the prior art for analyzing the shape and position of the electronic stator and rotor, which requires power-on rotation at a rated speed greater than or equal to 10%, the present invention performs all-static detection without power-on, breaks through the dependence on the rotating magnetic field, and fills the gap in the prior art.

[0015] (2) The traditional mainstream vibration spectrum method (ISO 20816-1:2022) has a principle limitation: the single-channel vibration spectrum, that is, the one-dimensional frequency domain, can only obtain one-dimensional frequency domain characteristics and cannot reconstruct the three-dimensional spatial offset. The axial / radial deviation coupling effect causes error amplification. The present invention constructs a multi-dimensional quantization model of axial offset, radial eccentricity, and angular tilt to evaluate the coaxiality and shape and position of the stator and rotor, reducing errors and being more accurate.

[0016] (3) The traditional evaluation system's acquisition device uses an encoder, resulting in extremely high costs. The present invention uses an optical composite sensing architecture composed of a laser and a photosensitive imaging plate to greatly reduce the unit detection cost, while meeting the calibration accuracy requirements of ISO / IEC16025:2017. Compared with the electromagnetic induction scheme, the present technology uses optical detection to avoid the problem of eddy current interference of metal components; compared with the multi-probe mechanical structure, this solution realizes self-calibration through laser calibration, reducing the system complexity.

[0017] (4) By adjusting the screw knobs in three directions of the base, different types and specifications of motor stators can be clamped, which has strong versatility.

[0018] (5) By sleeving a pressure-loading bearing on the output end of the rotor and applying thrust or tension in different directions, the actual load of the motor is simulated. It is easy to operate, highly versatile, and the test is fast and accurate.

[0019] (6) There is no need to energize the motor, avoiding the risks to personnel and equipment during the detection of the motor in an explosion-proof environment.

[0020] (7) Since there is no need to energize the motor, this evaluation method and device can be used in indoor and outdoor, wharf, field and other motor application and stacking occasions, with a wider application range. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the trajectory left by the laser on the photosensitive imaging plate before and after deflection when the output shaft of the rotor in Embodiment 1 of the present invention is subjected to a pressure load;

[0022] Figure 2 It is a schematic diagram of the angular inclination between the rotor and the stator provided in Embodiment 1 of the present invention;

[0023] Figure 3 It is a schematic diagram of the trajectory left by the laser on the photosensitive imaging plate after deflection when the output shaft of the rotor in Embodiment 1 of the present invention is subjected to a pressure load;

[0024] Figure 4 It is a front shaft-side schematic diagram of the structure of the static magnetic multi-dimensional position analysis device for the motor stator and rotor and the motor assembly provided in Embodiment 3 of the present invention;

[0025] Figure 5 It is a rear shaft-side view of the static magnetic multi-dimensional position analysis device for the motor stator and rotor provided in Embodiment 3 of the present invention;

[0026] Figure 6 It is a left view of the static magnetic multi-dimensional position analysis device for the motor stator and rotor and the motor assembly provided in Embodiment 3 of the present invention;

[0027] Figure 7 It is a rear shaft-side schematic diagram of the structure of the static magnetic multi-dimensional position analysis device for the motor stator and rotor and the motor assembly provided in Embodiment 3 of the present invention. Detailed Embodiments

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] The hardware implementation environment in the following method embodiments can be referred to Figure 1-7 .

[0030] A static magnetic multi-dimensional position analysis and evaluation method for a motor stator and rotor provided in Embodiment 1 of the present invention includes the following steps:

[0031] Step 1: Under the static magnetic condition of the motor, by fixing the motor stator 100, a radial and axial combined load is applied to the rotor to simulate the load of the motor during actual operation.

[0032] In this step, under the action of the load, the rotor 200 will deflect. Refer to Figure 1 The solid-line rotor in [reference] is the deflected rotor.

[0033] Step 2: Fix a laser on the output shaft 300 of the rotor and manually twist the rotor one full turn. The laser will draw the trajectory of the rotor's rotation on the photosensitive imaging plate.

[0034] Refer to Figure 6 , a straight line parallel to the axis of the standard normal rotor output shaft is set as the x-axis, the photosensitive imaging plate is perpendicular to the axis of the standard normal rotor output shaft, and the photosensitive imaging plate is set as the y-axis.

[0035] Step 3: Using the Time-of-Flight (ToF) ranging principle, move the rotor axially forward and backward, and use the time difference between the forward and backward laser emission and the imaging on the imaging plate to calculate the axial offset ΔX of the rotor. ΔX = cΔt, where c is the speed of light and Δt is the time difference.

[0036] In this step, refer to the device embodiment, move the second screw 32 back and forth along the guide hole 23 to achieve axial movement of the rotor.

[0037] Step 4: Calculate the angular tilt θ through the major axis and minor axis of the ellipse formed by the laser movement trajectory;

[0038] In this step, since the trajectory shown on the photosensitive imaging plate after the moved rotor rotates one full turn is an ellipse, refer to Figure 3 , while the trajectory shown on the photosensitive imaging plate when the rotor rotates one full turn under normal working conditions is a perfect circle, refer to Figure 1 the dotted-line trajectory in [reference].

[0039] The minor axis AC of the ellipse is the radius of the perfect circle trajectory when the rotor rotates one full turn under normal working conditions; the major axis AB of the ellipse is the projection of the laser output trajectory on the rotor on the photosensitive imaging plate after the rotor moves. Through θ = arccos(AC / AB), calculate the inclination angle θ between the rotor and the stator. The smaller θ is, the smaller the form and position offset of the rotor, and the better the coaxiality. In the case of complete coaxiality, θ = 0.

[0040] Step 5: By adjusting the radial pressure applied to the rotor, use the position difference of the laser on the imaging plate before and after adjustment to obtain the radial eccentricity ΔY.

[0041] In this step, the radial pressure applied to the rotor can be achieved through the appendix of the specification Figure 5It is implemented by the pressure regulating knob 33 in it, driving the second screw 32 to push the pressure loading bearing 31 sleeved on the outer periphery of the rotor, and then applying loads to the rotor in each radial direction.

[0042] Step 6, based on the synchronous analysis of the axial offset (ΔX), radial eccentricity (ΔY), and angular tilt (θ) geometric positions, establish a multi-degree-of-freedom spatial motor rotor geometric position analysis and evaluation method.

[0043] In this embodiment, by comparing the motion trajectories left on the photosensitive plate when the rotor rotates under the standard normal working state without power (static magnetism) with the motion trajectories left on the photosensitive plate when the rotor to be detected rotates, the three-dimensional spatial offset amounts of the axial offset (ΔX), radial eccentricity (ΔY), and angular tilt (θ) are obtained through analysis. It avoids obtaining vibration signals under different rotational speed and torque states of the motor under power-on conditions, being affected by the electromagnetic interference of the electronic control system (IEEE Access, 2022 points out that the harmonics of the frequency converter will cause a ±15% phase measurement error), can detect static assembly errors, and is suitable for damaged motors or explosion-proof places.

[0044] A method for static magnetic multi-dimensional geometric position analysis and evaluation of a motor stator and rotor provided in Embodiment 2 of the present invention includes the following steps:

[0045] Step 201, in the case of static magnetism of the motor, by fixing the motor stator 100, apply a four-quadrant orthogonal radial load to the rotor to simulate the load of the motor during actual operation.

[0046] In this step, the rotor 200 will deflect under the action of the load. Refer to Figure 1 The solid-line rotor in it is the deflected rotor.

[0047] Among them, for the specific implementation method of applying the four-quadrant orthogonal radial load, refer to the attached Figure 4 and Figure 5 of the static magnetic multi-dimensional geometric position analysis device for the motor stator and rotor.

[0048] Step 202, for each radial load, fixedly connect a laser to the output shaft 300 of the rotor, manually twist the rotor one circle, and the laser draws the motion trajectory of the rotor rotation on the photosensitive imaging plate.

[0049] Refer to Figure 6 A straight line parallel to the axis of the standard normal rotor output shaft is set as the x-axis, the photosensitive imaging plate is perpendicular to the axis of the standard normal rotor output shaft, and the photosensitive imaging plate is set as the y-axis.

[0050] Step 203, using the Time-of-Flight (ToF) ranging principle, use the time difference between the laser signals received on the photosensitive imaging plate before and after the rotor moves to calculate the axial offset amount ΔX of the rotor i = cΔti , where c is the speed of light and Δt i is the time difference between the time when the laser signal is received on the photosensitive imaging plate before and after the rotor movement of the i-th radial load.

[0051] In this step, referring to the device embodiment, the second screw 32 can be toggled back and forth to move along the guide hole 23 to axially move the rotor.

[0052] Step 204, calculate the angular tilt θ by the major axis and minor axis of the ellipse formed by the laser movement trajectory i .

[0053] In this step, since the trajectory displayed on the photosensitive imaging plate after the rotor rotates one week after movement is an ellipse, referring to Figure 3 , while the trajectory displayed on the photosensitive imaging plate when the rotor rotates one week under normal working conditions is a perfect circle, referring to Figure 1 the dotted trajectory in.

[0054] The minor axis AC of the ellipse is the radius of the perfect circle trajectory when the rotor rotates one week under normal working conditions; the major axis AB of the ellipse is the projection of the laser output trajectory on the rotor on the photosensitive imaging plate after the rotor moves. Through θ i = arccos(AC / AB), calculate the inclination angle θ between the rotor and the stator under the i-th load condition i , θ i is smaller, the form deviation of the rotor is smaller, the coaxiality is better, and in the case of perfect coaxiality, θ i = 0.

[0055] Step 205, apply radial pressure to the rotor by adjusting each radial load, and use the position difference of the laser on the imaging plate before and after adjustment to obtain the radial eccentricity ΔY of the i-th radial load i .

[0056] In this step, the radial pressure on the rotor can be applied through the pressure adjustment knob 33 in the Figure 5 instructions. Drive the second screw 32 to push the pressure loading bearing 31 sleeved on the outer periphery of the rotor, and then apply loads to the rotor in each radial direction.

[0057] Step 206, calculate the four orthogonal radial load data by the adaptive weighted algorithm and output the average value of the rotor form deviation Establish a synchronous analysis multi-degree-of-freedom spatial motor rotor form analysis and evaluation method for axial offset, radial eccentricity, and angular tilt form.

[0058] In this step, i represents the i-th radial load and n represents the number of radial loads.

[0059] In this embodiment, the motion trajectory left by the rotor rotation on the photosensitive plate under the non-powered (static magnetic) condition in the standard normal working state is calculated and compared with the motion trajectory left by the rotation of the rotor to be detected, and the average values of the axial offset, radial eccentricity, and angular tilt in three-dimensional space of the loads in multiple radial directions of the rotor are obtained through analysis. Improve the accuracy of the static magnetic multi-dimensional position analysis and evaluation method for the motor stator and rotor.

[0060] See Figure 4-7 , which is a schematic diagram of the mechanism of a static magnetic multi-dimensional position analysis and evaluation device for a motor stator and rotor provided in Embodiment 3 of the present invention. The device includes a pressure loading device, a trajectory acquisition device, an evaluation device, and a base 60.

[0061] The pressure loading device is used to apply loads in different directions to the rotor 200 by fixing the motor stator 100 when the motor is not powered.

[0062] The trajectory acquisition device is used to fixedly connect a laser 40 to the output shaft 300 of the rotor, and manually twist the rotor one circle, and the laser draws the trajectory of the rotor rotation on the photosensitive imaging plate 50.

[0063] The evaluation device is used to calculate the included angle between the motor stator and rotor according to the geometric dimensions of the trajectory, and evaluate the multi-dimensional position of the motor stator and rotor according to the size of the included angle.

[0064] The base is used to install the pressure loading device, the trajectory acquisition device, and the evaluation device.

[0065] In this embodiment, the pressure loading device includes a bracket 10, an adjusting screw mechanism 20, and a pressure loading bearing mechanism 30. The adjusting screw mechanism moves horizontally or longitudinally along the bracket, and the adjusting screw mechanism can adjust the horizontal or longitudinal movement of the motor output shaft bearing mechanism. Thus, the pressure loading device can apply loads in different directions to the rotor output shaft in three-dimensional directions. According to the loads in different directions, the evaluation device records and analyzes to realize the evaluation of the multi-dimensional position of the motor stator and rotor.

[0066] The bracket 10 includes a ring 11 coaxial with the motor output shaft, and a bracket guiding portion 12 provided on the circumferential wall of the ring. Specifically, the axis of the ring coincides with the axis of the standard normal rotor output shaft, and the center line of the guiding hole (i.e., the guiding line) of the sliding direction of the guiding hole of the bracket guiding portion on the circumferential wall of the ring passes through the center of the ring. There are two bracket guiding portions provided on the left and right, and one is vertical. Two brackets are horizontally spaced.

[0067] The adjusting screw mechanism 20 includes a first screw 21 and a guiding portion 22. The first screw passes through the guide holes 13 of the two bracket guiding portions through a pressing plate 23 and is threadedly connected to the end face of the adjusting screw mechanism guiding portion along the sliding direction of the guide hole. The two bracket guiding portion guide holes can support the first screw to more easily and conveniently maintain a horizontal position. At this time, the guiding line of the adjusting screw mechanism guiding portion guide hole is parallel to the axis of the standard normal rotor output shaft. By adjusting the butterfly knob 211 at one end face of the first screw, the first screw rotates threadedly with the end face of the adjusting screw mechanism guiding portion, driving the pressing plate to push the adjusting screw mechanism guiding portion to move along the guiding line of the guide hole. The position of the first screw on the guiding line of the guide hole of the bracket guiding portion determines the position where the pressure loading device applies pressure to the rotor output shaft in the radial direction.

[0068] The pressure loading bearing mechanism 30 includes a pressure loading bearing 31 sleeved on the rotor output shaft 300 and a second screw 32. The axis of the second screw passes through the center of the pressure loading bearing. The outer peripheral wall of the pressure loading bearing is rotationally connected to one end face of the second screw, and the other end of the second screw passes through the guide hole 23 of the adjusting screw mechanism guiding portion and is threadedly connected to a pressure adjusting knob 33. When the knob is placed above the adjusting screw mechanism guiding portion and rotated, an upward pulling force can be applied; when the knob is placed below the adjusting screw mechanism guiding portion and rotated, a downward pushing force can be applied.

[0069] The position of the second screw on the guiding line of the guide hole 23 of the adjusting screw mechanism guiding portion determines the position where the pressure loading device applies pressure to the rotor output shaft in the axial direction.

[0070] The trajectory acquisition device includes a laser 40 perpendicular to the axis of the standard motor rotor output shaft and a photosensitive imaging plate 50.

[0071] The evaluation device is specifically an integrated trajectory analysis system in the base.

[0072] A wireless system is also integrated in the base 60, and the wireless system is communicatively connected to the trajectory analysis system.

[0073] A gantry bracket 61 is provided on the base 60 for fixing the photosensitive imaging plate 50 (not shown in the figure) perpendicular to the axis of the standard motor rotor output shaft. The emission signal of the laser emitter 40 passes through the ring and is received by the photosensitive imaging plate 50. The electrical signal formed by the photosensitive imaging plate is electrically connected to the trajectory analysis system, and the analysis result is output to the terminal through the wireless system.

[0074] A memory is also integrated inside the base, storing program instructions to implement the method described in the method embodiment.

[0075] Optionally, the wireless system can wirelessly transmit the data output by the photosensitive imaging plate 50 to the terminal. The terminal integrates a trajectory analysis system, and the memory in the terminal stores program instructions to implement the method described in the method embodiment.

[0076] The laser is a magnetic adsorption laser pen, which can be adsorbed on the outer circumference or end face of the rotor output shaft. An evaluation device can be installed on the existing motor, thus saving costs.

[0077] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. Static magnetic multi-dimensional position analysis and evaluation method for motor stator and rotor, characterized in that, Including: Under the static magnetic state, fix the motor stator, apply axial / radial composite load to the rotor to simulate the load of the motor during actual operation, fixedly connect a laser to the output shaft of the rotor, and the laser forms an image on the photosensitive imaging plate; According to the laser imaging trajectory, imaging time difference, and imaging position difference, the system statistically processes the four-way load data through an adaptive weighting algorithm, calculates the three-dimensional deformation parameters of the motor rotor, and realizes the quantitative analysis and evaluation of the shape and position deviation.

2. The method according to claim 1, wherein The step of statistically processing the four-way load data through an adaptive weighting algorithm according to the laser imaging trajectory, imaging time difference, and imaging position difference, calculating the three-dimensional deformation parameters of the motor rotor, and realizing the quantitative analysis and evaluation of the shape and position deviation includes: Using the laser ranging principle, by axially moving the rotor forward and backward, and using the time difference of the laser signals received on the photosensitive imaging plate before and after the rotor moves, calculate the axial offset ΔX = cΔt of the rotor, where c is the speed of light and Δt is the time difference; Calculate the angular tilt θ of the rotor through the major axis and minor axis of the ellipse formed by the laser movement trajectory; By adjusting the radial pressure applied to the rotor, and using the position difference of the laser on the imaging plate before and after adjustment, obtain the radial eccentricity ΔY of the rotor Obtain the three-dimensional deformation parameters: axial offset ΔX, angular tilt θ of the rotor, and radial eccentricity ΔY of the rotor.

3. The method according to claim 2, wherein The step of applying radial and / or axial composite load to the rotor is specifically: applying a plurality of radial loads to the rotor; According to the laser imaging trajectory, imaging time difference, and imaging position difference, the system performs statistical processing on the four-direction load data through an adaptive weighting algorithm, calculates the three-dimensional deformation parameters of the motor rotor, and the specific steps for realizing the quantitative analysis and evaluation of the shape and position deviation are as follows: For the load in each direction, obtain the axial offset ΔX of the rotor i , the radial eccentricity ΔY of the rotor i , the angular tilt θ of the rotor i , where i represents the number of radial loads; Calculating the several load data through an adaptive weighting algorithm and outputting the mean value of the three-dimensional deformation parameters of the rotor 4. Static magnetic multi-dimensional position analysis and evaluation device for motor stator and rotor, characterized in that, Including A pressure loading device, under the static magnetic state, fix the motor stator, apply axial / radial composite load to the rotor to simulate the load of the motor during actual operation; A trajectory acquisition device, including two parts: a laser and a photosensitive imaging plate, fixedly connect the laser to the output shaft of the rotor, and the laser forms an image on the photosensitive imaging plate; An evaluation device, used to statistically process the four-way load data through an adaptive weighting algorithm according to the laser imaging trajectory, imaging time difference, and imaging position difference, calculate the three-dimensional deformation parameters of the motor rotor, and realize the quantitative analysis and evaluation of the shape and position deviation.

5. The device according to claim 4, characterized in that, The pressure loading device includes a bracket, an adjusting screw mechanism, and a pressure loading bearing mechanism. The adjusting screw mechanism moves horizontally or longitudinally along the bracket, and the adjusting screw mechanism can adjust the horizontal or longitudinal movement of the bearing mechanism of the motor output shaft.

6. The device according to claim 4, wherein The bracket includes a ring coaxially arranged with the motor output shaft, and a bracket guiding part is arranged on the circumferential wall of the ring; The adjusting screw mechanism includes a first screw and a guiding part. The first screw passes through the guiding hole of the bracket guiding part through a pressing plate and is threadedly connected to the end face of the guiding part of the adjusting screw mechanism along the sliding direction of the guiding hole; The pressure loading bearing mechanism includes a pressure loading bearing sleeved on the motor output shaft and a second screw. The outer circumferential wall of the pressure loading bearing is rotatably connected to one end face of the second screw, and the other end of the second screw passes through the guiding hole of the guiding part of the adjusting screw mechanism and is threadedly connected to the pressure adjusting knob.

7. The device according to claim 4, characterized in that, It further includes a base, and a trajectory analysis system and a wireless system are integrated inside the base. The photosensitive imaging plate is electrically connected to the trajectory analysis system, and the trajectory analysis system is communicatively connected to the wireless system.

8. The device according to claim 7, characterized in that, The base integrates a storage medium inside to store program instructions for implementing the method described in claim 2.

9. The device according to claim 4, wherein The photosensitive imaging plate is vertically arranged on the axis of the output shaft of the standard rotor.

10. The device according to claim 4, wherein, The laser is a magnetic adsorption laser pen.

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