CN214795112U - Servo test system - Google Patents

Abstract

The utility model discloses a servo test system. Wherein, this system includes: the device comprises a reflector, a laser pen, a white board and a servo motor; the reflector is arranged on a rotating shaft of the servo motor and rotates along with the rotation of the rotating shaft; the laser pen emits light beams to the reflector, and the reflector reflects the light beams emitted by the laser pen to the white board. The utility model provides a servo test system among the correlation technique, the technical problem of servo motor's responsiveness can't be tested.

Description

Servo test system

Technical Field

The utility model relates to a servo test field particularly, relates to a servo test system.

Background

The servo motor is an engine which controls the operation of mechanical elements in a servo system, is controlled by hand input signals and can quickly respond, and the servo motor is used as an actuating element in an automatic control system, has the characteristics of small electromechanical time constant, high definition degree and the like, and has the responsiveness which is one of performance indexes.

In the prior art, a system or a device for directly testing the responsiveness of the servo motor does not exist, so that the responsiveness of the servo motor is difficult to accurately and effectively determine.

In view of the above problems, no effective solution has been proposed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a servo test system to solve servo test system in the correlation technique at least, the technical problem of servo motor's responsiveness can't be tested.

According to the utility model discloses an aspect of the embodiment provides a servo test system, include: the device comprises a reflector, a laser pen, a white board and a servo motor; the reflector is arranged on a rotating shaft of the servo motor and rotates along with the rotation of the rotating shaft; the laser pen emits a light beam to the reflector, and the reflector reflects the light beam emitted by the laser pen to the whiteboard.

Optionally, the method further includes: and the servo driver drives the rotating shaft of the servo motor to reciprocate among a plurality of working points.

Optionally, the total time of the single reciprocating time of the rotating shaft of the servo motor between the plurality of working points and the preset time of pausing of each working point does not exceed the persistence time.

Optionally, the number of the working points is two, and two circular light spots are displayed on the white plate.

Optionally, the servo driver is connected to the controller, the controller is configured to adjust the preset time, and control the servo driver to drive the rotating shaft of the servo motor to move at the preset time, so that the two light spots on the whiteboard are displayed in a circular shape.

Optionally, the laser pen further comprises a platform, the platform comprises a first fixing device, a second fixing device and a third fixing device, the servo motor is connected with or fixed to the first fixing device, the whiteboard is connected with or fixed to the second fixing device, and the laser pen is placed on or fixed to the third fixing device.

Optionally, the third fixing device is provided with an angle adjusting mechanism or a placing mechanism, and the laser pen is placed or fixed on the angle adjusting mechanism or the placing mechanism in an angle-adjustable manner.

Optionally, the pen point of the laser pen faces the reflector, the angle of the incident angle of the emitted light of the laser pen on the reflector is a, wherein the angle range of the angle range is greater than 0 degree and less than 90 degrees, the laser pen emits the reflected light on the reflector, and the whiteboard and the reflected light are located on the same horizontal line.

Optionally, an incident angle of the emitted light of the laser pointer on the reflective mirror is 45 °.

Optionally, the laser pen emits reflected light on the reflective mirror, and the reflection range of the reflected light is on the whiteboard.

In the embodiment of the utility model, the reflector is arranged on the rotating shaft of the servo motor and runs along with the rotation of the rotating shaft; the laser pen emits a light beam to the reflector, the reflector reflects the light beam emitted by the laser pen onto the white board, and the servo motor dwell time is adjusted to determine the servo motor dwell time as the response time when the light spot on the white board is circular, so that the aim of testing the response of the light spot on the white board to the servo motor is fulfilled, the technical effect of effectively testing the response of the servo motor is achieved, and the technical problems that a servo test system in the related art cannot test the response of the servo motor are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic diagram of a servo test system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of servo motor response time according to an embodiment of the present invention;

fig. 3 is a flow chart of a servo motor test according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a servo motor test system according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of 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, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic diagram of a servo test system according to an embodiment of the present invention, as shown in fig. 1, according to an aspect of the embodiment of the present invention, there is provided a servo test system, including: a reflective mirror 12, a laser pointer 14, a white board 16, a servo motor 18;

the reflector 12 is mounted on the rotating shaft of the servo motor 18 and rotates along with the rotation of the rotating shaft; the laser pointer 144 emits a light beam onto the reflective mirror 12 and the reflective mirror 12 reflects the light beam emitted by the laser pointer 14 onto the whiteboard 16.

Through the system, the reflector is arranged on the rotating shaft of the servo motor and rotates along with the rotation of the rotating shaft; the laser pen emits a light beam to the reflector, the reflector reflects the light beam emitted by the laser pen onto the white board, and the servo motor dwell time is adjusted to determine the servo motor dwell time as the response time when the light spot on the white board is circular, so that the aim of testing the response of the light spot on the white board to the servo motor is fulfilled, the technical effect of effectively testing the response of the servo motor is achieved, and the technical problems that a servo test system in the related art cannot test the response of the servo motor are solved.

The rotating shaft of the servo motor performs a cyclic reciprocating motion between a plurality of working points, and a pause of a preset time is performed at each working point, wherein the preset time of the pause is set by a controller for controlling the servo motor to work. Because the rotating shaft is provided with the reflecting mirror, reflects the light beam emitted by the laser pen and reflects the light beam to the white board, a plurality of light spots corresponding to a plurality of working points are formed.

The high responsiveness of the servo driver can be shown through the shape deformation degree of the light spot, the smaller the light spot deformation is, the higher the responsiveness is, if the responsiveness is fast, the laser spot is a perfect circle, and the fast responsiveness means that the in-place setting time is short; if the response is slow, the laser point is an ellipse, and the slow response means that the in-place setting time is long. By adding the moving points, a plurality of laser points can be displayed on the white board, and the high responsiveness of the servo driver can be better demonstrated. The responsiveness of the servo driver refers to a time difference between the first time the feedback position of the rotating shaft of the servo motor reaches the corresponding working point and the stable stop at the working point.

When the rotating shaft of the servo motor is paused for a preset time at a working point, if the paused preset time is longer than the time difference of the responses, the rotating shaft can have enough time to respond at the corresponding working point, the spot page reflected on the white board has enough time to be stable into a circle, if the spot on the white board is circular, the paused preset time can be continuously adjusted to be small until the spot cannot be stable into the circle and is deformed into an ellipse, the paused preset time can be determined to be small enough, so that the rotating shaft cannot be stable in the response time, and the spot on the white board cannot be stable into the circle.

Optionally, the method further includes: and the servo driver drives the rotating shaft of the servo motor to reciprocate among the plurality of working points.

The servo driver belongs to a part of a servo system and is connected with the servo motor to drive the servo motor to work.

The servo motor is driven to move only by reciprocating between a plurality of working points, and the responsiveness of the rotating shaft at the plurality of working points is observed in the moving process. And observing the light spot corresponding to the working point on the white board by adjusting the dwell time of the rotating shaft at the working point, and determining the responsiveness of the servo motor.

The reciprocating motion can keep the rotating shaft of the servo motor in a motion state, so that the time for converting the motion state into a static state is effectively avoided, the light spot of a working point in the motion process becomes stable, and the responsiveness is difficult to determine and observe.

Optionally, the total time of the single reciprocating time of the rotating shaft of the servo motor between the plurality of working points and the preset time of pausing of each working point does not exceed the persistence of vision time.

The total time of the single reciprocating motion time among the plurality of working points and the preset time for pausing of each working point does not exceed the persistence time of vision, the persistence time of vision is the time for human eyes to generate persistence phenomenon, under the condition that the persistence time of vision is not exceeded, the photoelectric motion is too fast, the human eyes generate persistence of vision, the track of a light spot in the moving process cannot be effectively captured, only the process that the light spot pauses at the working points can be observed, and the pause time and the light spot deformation can be observed more obviously.

The persistence phenomenon refers to that when human eyes observe a scene, a light signal is transmitted into brain nerves, a short time is needed, after the action of light is finished, a visual image does not disappear immediately, the residual vision is called 'afterimage', and the phenomenon of vision is called 'persistence of vision'.

The laser pen emits a light beam to irradiate the reflector on the servo shaft, the reflected light beam hits the white board, the servo shaft moves for a certain angle, and the position of the laser point on the white board also moves. As long as the time interval between the two times before and after the working point moves is less than the persistence time of human vision, a light point corresponding to the working point can be seen on the whiteboard.

Alternatively, the number of operating points is two, and two circular spots are displayed on the white plate.

The number of the above-mentioned workload may be two or 3, 4, 5, etc., and the number of the circular light spots displayed on the white plate corresponds to the number of the operating points. When the light spot is displayed as a circular light spot, the rotating shaft of the servo motor can be confirmed to finish the response at the working point, if the shape of the light spot is an ellipse, the response time is insufficient, and the dwell time of the rotating shaft of the servo motor at the working point is required to be adjusted.

Optionally, the servo driver is connected to the controller, the controller is configured to adjust the preset time, and the servo driver is controlled to drive the rotating shaft of the servo motor to move for the preset time, so that the two light spots on the whiteboard are displayed as a circle.

The controller can be connected with the servo driver, and controls the servo driver to control the rotating shaft of the servo motor to pause at the working point by modifying the pause preset time at the working point so as to display the light spot corresponding to the working point on the whiteboard to be circular.

In this embodiment, taking two working points as an example, two light spots are displayed on the whiteboard, and the controller adjusts the preset time of the pause, so that the two light spots on the whiteboard are both circular. And then fine adjustment is carried out, the preset time of the light spot in the circular shape is gradually reduced until the light spot is changed from the circular shape to the elliptical shape, and the minimum preset time is selected as the response time of the servo motor from a plurality of preset times of the light spot in the circular shape, so that the response of the servo motor is detected.

Optionally, the laser pen further comprises a platform, the platform comprises a first fixing device, a second fixing device and a third fixing device, the servo motor is connected with or fixed on the first fixing device, the white board is connected with or fixed on the second fixing device, and the laser pen is placed on or fixed on the third fixing device.

There is the light path between above-mentioned servo motor, blank and the laser pen, consequently connects servo motor or fixes on first fixing device, and the blank is connected or is fixed on second fixing device, and the laser pen is placed or is fixed on third fixing device to fix servo motor, blank and laser pen on same platform, guarantee its relative position's stability, avoided because the device between servo motor, blank and the laser pen takes place to remove and leads to the problem of detection error even failure.

Optionally, the third fixing device is provided with an angle adjusting mechanism or a placing mechanism, and the laser pen can be placed or fixed on the angle adjusting mechanism or the placing mechanism in an angle-adjustable manner.

The laser pointer may be mounted on the third fixing device in various ways, for example, by placing or fixing, by an angle adjusting mechanism or a preventing mechanism. Above-mentioned angle adjustment mechanism can include angle adjustment subassembly and fixed subassembly, and fixed subassembly can be clamping device, perhaps latch device, with laser pen demountable installation on fixed subassembly, fixed subassembly is fixed on angle adjustment mechanism, can adjust the angle of fixed subassembly through angle adjustment mechanism to the orientation of adjustment laser pen.

It should be noted that, the above-mentioned placing mechanism may also include an angle adjusting component, which can adjust the orientation of the laser pointer on the placing mechanism.

Optionally, the pen point of the laser pen faces the reflective mirror, and an angle of an incident angle of the emitted light of the laser pen on the reflective mirror is a, where an angle range of the angle a is greater than 0 ° and less than 90 °.

Optionally, the incident angle of the emitted light of the laser pointer on the reflector is 45 °.

The nib of laser pen just can guarantee towards the reflector that the light beam of laser pen transmission hits on the reflector, and the angle of incidence of the transmitted light of laser pen on the reflector is A, and the angle scope of A is for being greater than 0 and being less than 90, can effectively guarantee that the transmitted light of laser pen can the reflection light on the reflector.

The range of the incident angle of above-mentioned laser is for being greater than 0 and being less than 90, and is preferred, and its incident angle is 45, can guarantee to have comparatively obvious distance between incident light and the transmitted light, has guaranteed the distance between laser pen and the blank for the space between laser pen and the blank is comparatively compact, and the distance that is unlikely to incident light again and reflected light is too big, leads to the distance between laser pen and the blank too big, and then leads to the platform too big, and is comparatively heavy.

Optionally, the laser pen emits reflected light on the reflector, and the reflected light reflection range is on the whiteboard.

Reflected light can be emitted on the reflector through the laser pen, and the white board and the reflected light are located on the same horizontal line. That is, the white board is installed on the optical path of the reflected light. So that the reflected light rays reflect on the whiteboard.

Through adjusting the installation height and the installation angle of the reflective mirror on the rotating shaft, or the installation height of the whiteboard, or the orientation and the installation height of the laser pen, the light beam emitted by the laser pen is reflected by the reflective mirror and falls on the whiteboard.

The height of the reflector and the whiteboard relative to the ground is the same.

The white board and the emitting light are ensured to be at the same height, and the emitting light can fall on the white board. Under the condition that the white board and the reflected light are positioned on the same horizontal line, the white board and the reflector are installed at the same height, so that the reflected light reflected by the reflector can easily fall on the white board. At the moment, the light beam emitted by the laser pen can be reflected by the reflector and falls on the whiteboard by adjusting the installation height and the orientation of the laser pen.

It should be noted that the present application also provides an alternative implementation, and the details of the implementation are described below.

The embodiment relates to a laser galvanometer exhibition tool, which comprises an exhibition tool demonstration mechanism and demonstration software. The effect that the whiteboard displays a plurality of laser points is achieved through the high-frequency reciprocating motion of the servo, so that the positioning rapidity and the high responsiveness of the servo are reflected.

The phenomenon of persistence of vision (duration of vision) is also called "afterglow effect". In 1824, first proposed in his research report "persistence of vision of moving objects" by master professor pidte mark, london, uk.

When human eyes observe a scene, light signals are transmitted into brain nerves, a short time is needed, after the action of light is finished, the visual image does not disappear immediately, the residual vision is called 'afterimage', and the phenomenon of vision is called 'persistence of vision'.

Fig. 2 is a schematic diagram of response time of the servo motor according to the embodiment of the present invention, as shown in fig. 2, the laser pen emits light to irradiate the total reflection mirror on the servo shaft, i.e. the above-mentioned reflective mirror, the reflected light beam is incident on the white board, the servo shaft moves by a certain angle, and the position of the laser spot on the white board also moves. As long as the time interval between the two times before and after the movement is less than the persistence time of vision of human eyes, two laser points can be seen on the whiteboard, the high responsiveness of the servo driver can be shown through the shape deformation degree of the laser points, the smaller the deformation of the laser points is, the higher the responsiveness is, if the responsiveness is fast, the laser points are perfect circles, and the fast responsiveness means that the in-place setting time is short; if the response is slow, the laser point is an ellipse, and the slow response means that the in-place setting time is long. By adding the moving points, a plurality of laser points can be displayed on the white board, and the high responsiveness of the servo driver can be better demonstrated.

The response time of the servo driver refers to the time difference between the servo motor shaft feedback position and the target position after reaching the target position for the first time, namely (t2-t 1). The smaller the value of (t2-t1), namely the smaller the setting time required for reaching the target position, the faster the servo system reaches the target position, and the higher the response of the servo driver is proved; if the value of (t2-t1) is larger, namely the setting time required for reaching the target position is larger, the servo system reaches the target position more slowly, and the servo driver has weaker responsiveness.

Fig. 3 is a flow chart of a servo motor test according to an embodiment of the present invention, and as shown in fig. 3, a specific flow of the laser galvanometer display to verify the responsiveness of the servo driver is as follows:

a reflecting mirror is installed on a servo motor, a laser pen and a white board are fixed on a platform, and the laser pen and the center of the reflecting mirror are at the same height. The angle between the laser pen and the whiteboard is adjusted, so that the laser pen emits light to irradiate the whiteboard through the reflector, and the point is in a regular round shape in a static state.

When the servo is enabled, after the servo motor shaft moves to the point A, the servo motor shaft stably stays at the target position again, namely pauses for (t2-t1) ms, the servo motor shaft continuously moves to the point B, stably stays at the target position again, namely pauses for (t2-t1) ms, the servo motor shaft returns to the point A, and the servo shaft circularly reciprocates between the point A, B. Assuming that the moving time between the two points A, B is t', after reaching A, B, the moving time is (t2-t1) to stay at the target position stably, then the moving time of one pass between the two points A, B is: t1 is T '+ 2(T2-T1), then the reciprocation time of A, B is T2 is 2T' +4(T2-T1), and if T2 is less than 0.4 seconds, the persistence of vision of human eyes occurs, because 0.4 seconds is the persistence time, and at this time, two laser points can be clearly seen on the whiteboard. A. B reciprocating motion is shown in the following figure:

if the two circular distortions are seen to be elliptical, it is proved that the dwell time (t2-t1) is set to be too short, and at this time, the servo does not reach the target position stably, an overshoot phenomenon occurs, and the responsiveness of the servo cannot be exhibited. Whether the values of (t2-t1) are suitable or not can be reflected by the shape of the laser point, and the time of t2-t1 is set in the program of the upper computer. If t2-t1 is set too small, the key is turned up until the laser spot is perfectly circular, and the minimum (t2-t1) value for making the laser spot circular is found. The smaller the value setting of (t2-t1), the higher the responsiveness of the servo is proved. Conversely, the larger the value, the slower the responsiveness of the servo.

In addition to the high responsiveness of the driver that can be presented to the customer by two lasers, three laser spots are also possible.

As another embodiment, the laser spot is added to three spots. During servo enabling, after the servo motor shaft moves to the point A, the servo motor shaft stably stays at the target position again, namely pause (t2-t1) ms, after the servo motor shaft continuously moves to the point O, the servo motor shaft stably stays at the target position again, namely pause (t2-t1) ms, the servo motor shaft continuously moves to the point B, stably stays at the target position again, namely pause (t2-t1) ms, the servo motor shaft returns to the point O and the point A, and the servo shaft circularly reciprocates between the point A, O, B. Assuming that the motion time between A, O points is t', and the motion time between O, B points is t ", then the motion time for A, O, B points for a single pass is: t3 ═ T '+ T ± +3(T2-T1), then the back-and-forth time of A, O, B is T4 ═ 2T' +2T ± +6(T2-T1), if T4<0.4 seconds, the persistence of vision of the human eye occurs, because 0.4 seconds is the persistence of vision time, at this time, three laser points can be clearly seen on the whiteboard.

Fig. 4 is a schematic diagram of a servo motor testing system according to an embodiment of the present invention, as shown in fig. 4, structural components and functions of a mechanical structure of a display device are specifically as follows:

a exhibition tool base: necessary components for fixing a servo shaft, a laser pen and the like;

laser pen fixed stay: the support column is used for fixedly supporting the laser pen, and the support column can rotate in any direction to adjust the angle of the laser pen;

laser pen mounting fixture: the laser pen is used for fixing the laser pen;

a laser pen;

whiteboard fixed stay: the support column is used for fixedly supporting the white board and can rotate in any direction so as to adjust the angle of the white board for receiving light;

whiteboard fixed bolster: the device is used for fixing the white board;

fixing a support column by a servo motor: the servo motor is used for fixing the servo motor;

a servo motor;

a total reflection mirror: for reflection of the laser light;

a servo driver;

a motion controller.

According to the embodiment, the data interaction between the upper computer demonstration software and the motion controller is realized, the controller controls the high-frequency reciprocating motion of the servo driver, and the phenomenon of visual persistence of human eyes is combined to realize the simultaneous display of a plurality of laser points on the whiteboard, so that the positioning rapidity and the high responsiveness of the servo system are shown.

The laser galvanometer exhibition tool aims at exhibiting positioning rapidity and high responsiveness of a servo system, and in order to have a better exhibition effect, light reflection is realized through combination of a laser pen, a reflector and a white board, and a plurality of laser points are seen on the white board by combining the phenomenon of visual persistence of human eyes. The high responsiveness of the servo is shown by judging the deformation degree of the laser spot, and the smaller the deformation is, the higher the responsiveness is.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A servo test system, comprising: the device comprises a reflector, a laser pen, a white board and a servo motor;

the reflector is arranged on a rotating shaft of the servo motor and rotates along with the rotation of the rotating shaft;

the laser pen emits a light beam to the reflector, and the reflector reflects the light beam emitted by the laser pen to the whiteboard.

2. The servo test system of claim 1, further comprising: and the servo driver drives the rotating shaft of the servo motor to reciprocate among a plurality of working points.

3. The servo test system of claim 2, wherein a total time of a single reciprocating time of the rotary shaft of the servo motor between the plurality of working points and a preset time of a pause of each working point does not exceed a persistence time.

4. The servo test system of claim 3 wherein the number of operating points is two and two circular spots are displayed on the whiteboard.

5. The servo test system of claim 4, wherein the servo driver is connected to a controller, and the controller is configured to adjust the preset time and control the servo driver to drive the rotating shaft of the servo motor to move for the preset time, so that two light spots on the whiteboard are displayed as a circle.

6. The servo test system of any one of claims 1 to 5, further comprising a platform, wherein the platform comprises a first fixture, a second fixture and a third fixture, the servo motor is connected or fixed to the first fixture, the white board is connected or fixed to the second fixture, and the laser pointer is placed or fixed to the third fixture.

7. The servo test system of claim 6, wherein the third fixture is provided with an angle adjustment mechanism or a placement mechanism, and the laser pointer is angularly adjustably placed or fixed on the angle adjustment mechanism or the placement mechanism.

8. The servo test system of claim 6, wherein the tip of the laser pointer faces the mirror, and the angle of incidence of the emitted light of the laser pointer on the mirror is A, wherein A is in the range of greater than 0 ° and less than 90 °.

9. The servo test system of claim 8, wherein the angle of incidence of the emitted light of the laser pointer on the mirror is 45 °.

10. The servo test system of claim 8, wherein the laser pointer is launched with reflected light on the mirror, the reflected light reflection range being on the whiteboard.

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