An automated device and method for checking the accuracy of a vertical line system

Abstract

The present invention discloses an automated device and method for checking the accuracy of a vertical line system. The automated device includes a workbench, which is arranged on a vertical line coordinate meter, a guide groove is arranged on the workbench, a slider is arranged in the guide groove, a motor I is arranged on the slider, a strip measuring rod is arranged at the end of the motor I, a motor II is arranged at the lower part of the strip measuring rod, a laser is arranged at the bottom of the motor II, and an H-type contact wire mechanism is arranged at the end of the motor II, which cooperates with the motor I and the motor II to achieve a given precise displacement of the vertical line during the calibration process. In the present invention, the workbench can be placed horizontally and stably at any position, a laser can be used for precise orientation to ensure the consistency of the moving direction with the vertical line coordinate meter, a linear motor is used to eliminate positioning errors, and an H-type contact wire mechanism is used to ensure zero disturbance of the initial value of the vertical line. The overall structure is compact and small, the applicability is strong, it is easy to adjust and control, the working process is simple and clear, the work efficiency is improved, and the automated verification of the accuracy of the vertical line system is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of testing and evaluation of dam safety monitoring systems, and in particular relates to an automated device and method for verifying the accuracy of a plumb line system. Background Art

[0002] As the most accurate and effective means of horizontal deformation monitoring, the vertical line system is based on the vertical steel wire as the reference, and the displacement of the monitoring point relative to the steel wire is measured by the telemetry sensor vertical line coordinate meter. It is also the most important monitoring facility for the horizontal displacement and deflection of hydraulic structures such as hydropower station dams, and plays an important role in mastering the operating state of the dam structure and discovering the risks and hidden dangers of hydraulic structures. However, in the actual operation process, the vertical line system is often inaccurate and the data is distorted due to various factors such as human disturbance, changes in environmental factors, wrong parameter settings, aging of monitoring equipment, and sensor damage. In order to ensure the reliability of its final monitoring results, during the operation, maintenance and regular inspection of the dam, it is necessary to regularly test and evaluate the accuracy of the vertical line system in the hydropower station dam safety monitoring system, so that its observation results can truly and reliably reflect the actual operating state of the dam.

[0003] At present, the telemetering vertical coordinate meter of the vertical system mainly includes capacitive and photoelectric CCD, both of which use non-contact automatic displacement measurement equipment to measure the displacement value of the vertical line in the plane X and Y directions. The latest specifications clearly require that the accuracy test of the telemetering vertical coordinate meter in the vertical system should be carried out regularly. When the measurement accuracy decreases and cannot meet the requirements of dam safety monitoring, maintenance, calibration and transformation should be carried out in time. At present, in the accuracy test of the vertical system, most of the vertical calibration frames and standard gauge blocks or dial indicators of certain specifications and sizes available on the market are used, and they are combined with magnetic table holders and placed on the steel frame of the fixed vertical coordinate meter. After moving the vertical line a certain distance along the upstream and downstream (X direction) or left and right banks (Y direction) directions with standard gauge blocks or dial indicators, the absolute value of the difference between the displayed distance of the vertical coordinate meter or the distance in the automatic acquisition system and the actual moving distance is compared to judge the accuracy of the vertical system. However, the various test devices and methods adopted in the above-mentioned prior art in the accuracy test of the vertical system have the following defects and shortcomings:

[0004] First, the prior art combines a plumb line calibration frame with a standard gauge block or a dial indicator, which is assembled and fixed on the steel frame of the plumb line coordinate instrument by a magnetic table base. This assembly and fixing method is complex and has poor stability. It is very easy to cause overall sliding during the test, touching the plumb line to cause abnormal displacement. In addition, it directly causes the given displacement value to be extremely inaccurate, and has high requirements for operating personnel and on-site conditions, and is prone to large errors during the test; second, during the test, the direction of the given displacement is only adjusted by on-site personnel through visual inspection, and there is a large deviation from the actual direction of the X-axis and Y-axis of the telemetered plumb line coordinate instrument, and precise orientation cannot be achieved. It cannot ensure that the plane where the two axes of the given displacement are located is parallel to the plane composed of the two directions calibrated by the telemetered plumb line coordinate instrument, which will inevitably bring certain system errors; third, the accuracy test of the plumb line system needs to verify the measurement accuracy of the four directions of the left and right bank directions and the upstream and downstream directions. When converting the measurement coordinate axes , the existing technology needs to select a suitable location to reassemble and arrange the plumb line calibration frame, dial indicator and other equipment through the magnetic table holder, which is time-consuming, labor-intensive and inefficient; in addition, some on-site conditions can only arrange the test device in one direction, and the other direction cannot be tested; fourth, the existing device is easily affected by the on-site arrangement of the telemetering plumb line coordinate meter and its fixed steel frame. When the space between the steel frame and the plumb line coordinate meter is limited, the test device cannot be arranged, and it is inconvenient to conduct on-site testing. In this case, the test device can only be installed on the top of the fixed steel frame or other remote parts, resulting in a certain distance between the given displacement point and the monitoring point of the telemetering plumb line coordinate meter, causing linear error; fifth, there is currently no unified process for the accuracy test method of the plumb line system, and most of the evaluation methods use a single comparison and evaluation of the difference between the data collected by the automation system and the given displacement on site. When the absolute value of the deviation is large, it is impossible to distinguish the defects of the telemetering plumb line coordinate meter, the acquisition module or the automation system.

[0005] The Chinese patent, publication number CN203672345 U, discloses a universal calibration frame for on-site testing of the accuracy of a vertical coordinate meter in a hydropower station. The device only improves the applicability of the fixed mounting base and integrates the calibration frame with the displacement measuring device, reducing the error caused by the separate fixation of the calibration frame and the dial indicator. It does not consider the abnormal error problems caused by various factors such as the disturbance of the vertical line, the accuracy of the given displacement, the synchronization of the moving direction, and the deviation of the displacement occurrence point. It also does not consider how to improve the conversion efficiency of the measurement coordinate axis and standardize the measurement method. Summary of the invention

[0006] In order to solve the technical problems existing in the prior art, the object of the present invention is to provide an automated device and method for verifying the accuracy of a vertical line system.

[0007] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0008] An automated device for checking the accuracy of a plumb line system comprises a workbench capable of performing horizontal leveling, the workbench being detachably arranged on a plumb line coordinate measuring machine, a plurality of guide grooves being arranged on the workbench, a slider being arranged in the guide groove for reciprocatingly sliding along the guide groove, a motor I being arranged on the upper portion of the slider, a strip measuring rod capable of vertical reciprocating movement being arranged at one end portion of the motor I, a motor II being arranged at the lower portion of the strip measuring rod, a laser being arranged at the bottom of the motor II for emitting a laser directed toward a through hole of the plumb line system, an H-type contacting mechanism being arranged at one end portion of the motor II, a through hole of the plumb line system being arranged at one end portion of the H-type contacting mechanism away from the motor II, the H-type contacting mechanism working in coordination with the motor I and the motor II to achieve a given precise displacement of the plumb line at an appropriate position during the checking process.

[0009] Furthermore, the workbench is set on the plumb line coordinate instrument through the triangular base at the bottom of the workbench, a number of foot screws are evenly arranged at the bottom of the workbench, a circular level is set on the top of the workbench, and N linear slide rails are set on the workbench to form N-1 guide grooves.

[0010] Furthermore, the triangular base is provided with bolt holes, and the workbench is fixed to the triangular base by means of bottom hole bolts inserted into the bolt holes. A magnetic base is built into the bottom of the triangular base, and the magnetic base is connected to a handle switch, and adsorption and separation with the plumb line coordinate measuring machine are achieved by turning the handle switch.

[0011] Furthermore, N is 3, and three straight slide rails are arranged at equal distances inward from the left edge of the workbench, namely, an inner slide rail, a middle slide rail and an outer slide rail. The inner slide rail and the outer slide rail are at the same height and both are lower than the height of the middle slide rail. The inner slide rail and the middle slide rail form an inner guide groove, and the middle slide rail and the outer slide rail form an outer guide groove. A magnetic seat is arranged at the bottom of the slider in the inner guide groove, and the bottom of the slider in the outer guide groove is a hollow structure.

[0012] Furthermore, the positioning accuracy of the motor I and the motor II are both higher than ±10 μm, the total stroke is 200-300 mm, the linear movement speed of the motor is 2-5 mm / s, and the motor I and the motor II are respectively connected to the control module and controlled by the control module.

[0013] Furthermore, the motor I is an X-axis linear motor, the X-axis linear motor stator of the X-axis linear motor is fixed on the upper part of the slider, a cantilever slide groove is arranged at the inner end of the X-axis linear motor mover of the X-axis linear motor, and the strip measuring rod moves back and forth vertically in the cantilever slide groove.

[0014] Furthermore, the motor II is a Y-axis linear motor, a laser is arranged at the bottom of the Y-axis linear motor stator of the Y-axis linear motor, the laser is a directional laser, an H-type wire-contacting mechanism is arranged at one end of the Y-axis linear motor mover of the Y-axis linear motor, a conductive copper sheet is arranged on the inner side of the H-type wire-contacting mechanism, and it cooperates with the motor I and the Y-axis linear motor to work, the conductive copper sheet is connected to the control module, and when the H-type wire-contacting mechanism contacts the vertical line, the circuit is connected, and a signal is sent to the control module, and the motor in the corresponding direction is controlled by the control module to stop moving.

[0015] Furthermore, the strip-shaped measuring rod is provided with several rows of positioning holes from top to bottom, with two in each row. Two bolt through holes are provided on the cantilever slide and are equipped with locking nuts. The positioning holes are matched with the bolt through holes. The locking nuts pass through the bolt through holes and the positioning holes on the strip-shaped measuring rod from the outside of the cantilever slide to fix the strip-shaped measuring rod at a suitable height.

[0016] Furthermore, the laser is arranged in the middle of one side of the fixed part of motor II close to the H-type contact wire mechanism, and a laser switch is arranged at the end. The angle between the central axis of the laser and the horizontal plane is 30°, and the light emitted by the laser can reach the edge of the wire hole of the vertical line system.

[0017] The present invention also discloses a verification method of an automated device for verifying the accuracy of a vertical line system, comprising the following steps:

[0018] Step 1) Select a suitable position to place the triangular base and the work table on it on the vertical coordinate machine, adjust the foot screws at the bottom of the work table, at least three foot screws are under stress, and adjust the circular level to keep the work table in a horizontal and stable state;

[0019] Step 2) The slider is clamped in the guide groove, and the height of the strip measuring rod is adjusted to change the height of the H-type wire contact mechanism. When the H-type wire contact mechanism is adjusted to a height slightly higher than the wire passing hole, it is tightened, and the X- and Y-axis linear motors are controlled by the control module to move the H-type wire contact mechanism closer to the edge of the wire passing hole;

[0020] Step 3) Turn on the laser switch, the laser emits laser light to the upper edge of the wire hole, operate the X-axis linear motor to move forward or backward, and observe whether the laser light is offset at the upper edge of the wire hole. If offset occurs, adjust the position of the work table until the laser light remains at the upper edge of the wire hole without offset during the X-axis linear motor moving forward or backward, so that the displacement direction is consistent with the actual direction of the X-axis and Y-axis of the vertical coordinate measuring machine;

[0021] Step 4) adjusting the position of the H-type contact wire mechanism by controlling the X- and Y-axis linear motors so that the vertical line is located in one of the two inner groove areas of the H-type contact wire mechanism;

[0022] Step 5) Verify the accuracy of the vertical line system displacement in the upstream and downstream directions:

[0023] The upstream and downstream directions are the Y direction, with the downstream direction being positive. When the H-type contact wire mechanism touches the vertical line, the motor stops moving, the initial value of the Y-direction displacement is tested and the average value is calculated. Then, the X- and Y-direction linear motors are controlled to accurately give the corresponding displacement of the vertical line according to the specified stroke, and the measured value after the Y-direction displacement change is tested and the average value is calculated. Finally, the change in the displacement measured in the Y direction of the vertical coordinate instrument is calculated. y ; Repeat this step to verify the accuracy of displacement in the upstream direction;

[0024] Step 6) Verify the accuracy of the vertical line system displacement in the left and right bank directions:

[0025] The left and right banks are the X direction, and the right bank is positive. Place the vertical line in one of the two slot areas of the H-type contact wire mechanism, so that it is in a free state and stable, and then control the X-axis linear motor to move, and act according to step 5). When the X-axis linear motor stops moving, test the initial value of the X-axis displacement and calculate the average value. Then, by controlling the X and Y-axis linear motors to accurately give the corresponding displacement of the vertical line according to the specified stroke, test the measured value after the X-axis displacement changes and calculate the average value, and finally calculate the change B of the X-axis displacement measured by the vertical coordinate meter x ; Return the H-type contact wire mechanism to its original position, operate the X-axis linear motor to place the vertical line outside the H-type contact wire mechanism, and use the X-axis and Y-axis linear motors to place the vertical line in another slot area of ​​the H-type contact wire mechanism. After the vertical line is stable, repeat this step in the opposite direction to verify the displacement accuracy of the left and right banks in the other direction;

[0026] Step 7) Calculate the absolute value of the difference between the displacement change measured in the X and Y directions and the standard displacement according to the following formula |δ x |、|δ y |:

[0027]

[0028]

[0029] Then, |δ x |、|δ y |Compared with the tolerance μ required by the specification, when |δ x |or|δ y |>μ, the accuracy of this measuring point of the vertical line system does not meet the requirements. x |with|δ y | are all ≤μ, the accuracy of this measuring point of the plumb line system meets the requirements.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1) The present invention discloses an automated device for checking the accuracy of a plumb line system. The device is advanced in that a magnetic triangular base is provided, which cooperates with an angle screw to ensure that the worktable is in a horizontal state and is placed firmly. A nested structure of a guide groove and a slider is provided, which can be flexibly moved within the measuring range and overcomes the disadvantage of poor stability of the overall measuring device. A positioning laser is used for precise orientation to ensure the consistency of the moving direction with the plumb line coordinate meter. The characteristics of a linear motor with low-speed reciprocating motion and high positioning accuracy are utilized to eliminate various direct or indirect positioning errors caused by human factors or superposition of measuring equipment during the displacement process. A light-weight special contact wire mechanism with a conductive copper sheet is provided to achieve zero disturbance of the initial value during plumb line testing. The overall structure is compact and small, and can be placed on a plumb line coordinate meter or a fixed bracket for work, without being restricted by the working space, which greatly improves its applicability. The contact wire mechanism, the positioning laser and the linear motor cooperate to have good follow-up performance, are easy to adjust and control, and achieve automated verification of the accuracy of the plumb line system.

[0032] 2) The present invention also discloses a calibration method for an automated device for calibrating the accuracy of a plumb line system. The method achieves the accuracy of displacement through a workbench that can be horizontally leveled and a positioning laser. The operation process ensures the range and measurement range of the calibration device, achieves unidirectional displacement and precise orientation, and the control logic of the linear motor and the contact line mechanism is clear. The contact line stop prompt prevents human operation from disturbing the plumb line, thereby ensuring the reliability of the calibration result. The contact line mechanism is controlled on-site through an operation panel, and the accuracy calibration of four directions can be completed at one time. The control logic is clear, the process is simple and clear, and there is no need to re-arrange the calibration device, which greatly improves work efficiency. The displacement calculation is compared with the standard displacement by using an external small instrument or the display reading on the plumb line coordinate meter, thereby avoiding misjudgment of the accuracy of the plumb line coordinate meter due to defects in the acquisition module or the automation system. In addition to being widely used in safety monitoring of hydropower station dams, the present invention can also be used in deformation measurement of high-rise buildings, underground caverns, nuclear power plant containment, bridges and other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 A top view of the present invention;

[0035] Figure 3 It is a front cross-sectional schematic diagram of the present invention;

[0036] Figure 4 It is a left side cross-sectional schematic diagram of the present invention;

[0037] Figure 5 It is a block diagram of the working principle of the present invention;

[0038] Figure 6 is a flow chart of the present invention;

[0039] Among them, 1-triangular base, 101-magnetic base, 102-bolt hole, 103-bottom hole bolt, 104-handle switch, 2-foot screw, 3-circular level, 4-operating table, 5-linear slide, 501-inner slide, 502-middle slide, 503-outer slide, 6-guide groove, 601-inner guide groove, 602-outer guide groove, 7-slider, 8-rotating handle, 9-magnetic table base, 10-X-axis linear motor, 1001-X-axis linear Linear motor stator, 1002-X-axis linear motor mover, 11-Y-axis linear motor, 1101-Y-axis linear motor stator, 1102-Y-axis linear motor mover, 12-cantilever slide, 13-strip measuring rod, 14-positioning hole, 15-locking nut, 16-directional laser, 17-laser switch, 18-H-type contact wire mechanism, 19-conductive copper sheet, 20-control module, 21-operation panel, 22-vertical coordinate meter, 24-vertical line, 25-wire hole. DETAILED DESCRIPTION

[0040] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0041] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0042] like Figure 1-6As shown, an automated device for checking the accuracy of a vertical line system comprises a triangular base 1, a work table 4, a linear slide rail 5, a guide groove 6, a slider 7, an X-axis linear motor 10, a Y-axis linear motor 11, a cantilever slide 12, a strip measuring rod 13, a locking nut 15, a directional laser 16, an H-shaped contact wire mechanism 18, a conductive copper sheet 19, a control module 20, an operation panel 21, a vertical line 24 and a wire hole 25. The automated device uses the triangular base 1 and the work table 4 as the basic structure. The work table 4 is placed on the vertical coordinate instrument 22 or its fixed bracket through the triangular base 1 at the bottom. Eight foot screws 2 are evenly arranged at the bottom of the work table 4. A circular level 3 is set on the top of the work table 4. After the placement position is selected on site, the work table 4 is adjusted to a horizontal state and fixed by the foot screws 2. Three linear slide rails are set at equal distances from the left edge of the work table 4, which are the inner slide rail 501, the middle slide rail 502 and the outer slide rail 503, respectively, to form a guide groove 6, on which a slider 7 corresponding to it is set. The slider 7 is nested on the guide groove 6 and moves. The upper part of the slider 7 is fixed with the X-axis linear motor stator 1001 of the X-axis linear motor 10. The X-axis linear motor 10 adopts a T-slot nested slide rail structure. The X-axis linear motor mover 1002 is a rectangular groove nested structure. A cantilever slide groove 12 is arranged at the inner end of the X-axis linear motor mover 1002. A rectangular empty groove is arranged in the middle of the cantilever slide groove 12 for the strip measuring rod 13 to move up and down. The lower end of the strip measuring rod 13 is fixed with the Y-axis linear motor 11. The Y-axis linear motor 1 The rectangular nested structure is adopted. A directional laser 16 is arranged at the bottom of the Y-axis linear motor stator 1101, and the emitted light can be directed to the vertical line system through hole 25. An H-type contact wire mechanism 18 is arranged at one end of the Y-axis linear motor mover 1102. A conductive copper sheet 19 is arranged inside the H-type contact wire mechanism 18, which cooperates with the X-axis linear motor 10 and the Y-axis linear motor 11 to achieve precise displacement of the vertical line at a suitable position during the calibration process. The operation panel 21 of the overall automation device is arranged at the outer end of the slider 7.

[0043] The triangular base 1 is provided with a magnetic base 101 and a bolt hole 102. The bottom hole bolt 103 is inserted into the bolt hole 102 to connect and fix the workbench 4 to the triangular base 1 and then placed on the vertical coordinate measuring machine 22 or its fixed bracket. The magnetic base 101 is built into the bottom of the triangular base 1, and the magnetic base 101 can be adsorbed and separated from the vertical coordinate measuring machine 22 or the fixed bracket by turning the handle switch 104. The magnetic base 101 can use an existing magnetic table base product.

[0044] The workbench 4 is a square steel plate structure with a side length of 30 cm and a thickness of 2 to 3 cm. It is directly placed at one quarter of the surface of the vertical coordinate measuring machine 22 through the triangular base 1. When the vertical coordinate measuring machine 22 is too close to the top of the fixed bracket to be placed, it can be placed on the top of the fixed bracket.

[0045] The inner slide rail 501 and the outer slide rail 503 are of the same height, both 3 cm, and the middle slide rail 502 is 8 cm high. The three slide rails form an inner guide groove 601 and an outer guide groove 602 on the workbench 4.

[0046] The linear guide rail 5 and the slider 7 are both made of stainless steel, and the two are precisely nested in the guide groove 6. A magnetic base 9 is set at the bottom of the slider 7 in the inner guide groove 601. The bottom of the slider 7 is fixed and moved by the magnetic base 9 through the rotating handle 8. The magnetic base 9 can be an existing product. The bottom of the slider 7 in the outer guide groove 602 is a hollow structure, so that it is not disturbed by the bottom hole bolt 103 during the sliding process.

[0047] Six rows of positioning holes 14 are evenly arranged on the strip measuring rod 13 from top to bottom, with two holes in each row and a spacing of 8 cm; two bolt through holes are arranged in parallel on the cantilever slide 12 and are equipped with locking nuts 15, the positioning holes 14 are adapted to the bolt through holes, and the locking nuts 15 pass through the bolt through holes and the positioning holes 14 on the strip measuring rod 13 from the outside of the cantilever slide 12 to lock and fix them. After adjusting the Y-axis linear motor 11 at the lower end of the strip measuring rod 13 to a position slightly higher than the vertical line hole 25 on site, tighten the locking nuts 15 to fix the strip measuring rod 13 at a suitable height.

[0048] The X-axis linear motor 10 and the Y-axis linear motor 11 are both permanent magnet low-speed linear motors with a positioning accuracy of more than ±10 μm and a total stroke of 200-300 mm. During the measurement process, the linear movement speed of the motor is set to 2-5 mm / s.

[0049] The X-axis linear motor 10 and the Y-axis linear motor 11 are logically set to manual and automatic modes, and corresponding buttons are set on the operation panel 21. The manual mode includes forward and backward modes, which are used to adjust the H-shaped contact groove 18 to a suitable position close to the vertical line; the automatic mode is set with direction selection buttons: "+" "-", and stroke selection buttons: 5mm, 10mm, 20mm, 50mm.

[0050] The directional laser 16 is arranged at the middle of the fixed part of the Y-axis linear motor 11 close to the H-shaped contact wire mechanism 18, and a laser switch 17 is arranged at the end. The central axis of the laser forms an angle of 30° with the horizontal plane to ensure that when the Y-axis linear motor 11 is adjusted to a position slightly higher than the wire hole 25, the light emitted by the directional laser 16 can reach the edge of the wire hole 25.

[0051] The H-type wire contact mechanism 18 is made of a lightweight insulating material with a certain hardness, such as hard plastic, hard rubber, acrylic plate, etc. Two circles of narrow conductive copper sheets 19 are arranged around the inside and outside of the H-type wire contact mechanism 18 respectively, which serve as positive and negative poles to connect the control module 20. When the H-type wire contact mechanism 18 contacts the vertical line 24, the circuit is connected, a prompt sound is emitted, and a command is sent to the control module 20. In manual mode, the linear motor in the corresponding direction stops moving and waits for the next command.

[0052] A method for verifying the accuracy of a vertical line system using an automated device, comprising the following steps:

[0053] Step 1) Select a suitable position to place the triangular base 1 on the platform of the vertical coordinate measuring machine 22 or the fixed bracket, turn on the handle switch 104 to fix the triangular base 1, connect the workbench 4 to the triangular base 1 through the bottom hole bolts 103, adjust the foot screws 2 at the bottom of the workbench 4, at least three foot screws 2 are in a stressed state, adjust the bubble of the circular level 3 to the center, so that the workbench 4 is kept in a horizontal and stable state on the platform of the vertical coordinate measuring machine 22 or the fixed bracket;

[0054] Step 2) The slider 7, the motor and other integral structures are clamped in the guide groove 6 between the linear guide rails 5, and the height of the strip measuring rod 13 is adjusted. When the H-type contact wire mechanism 18 moves to a height slightly higher than the wire hole 25, it is fixed with the locking nut 15, and then the manual mode is selected in the operation panel 21. The forward and backward buttons are used to control the X and Y linear motors to move the H-type contact wire mechanism 18 closer to the edge of the wire hole 25;

[0055] Step 3) Turn on the laser switch 17, control the linear motor to make the directional laser 16 emit light to the upper edge of the wire hole 25, operate the X-axis linear motor 10 to move forward or backward, and observe whether the laser light is offset at the upper edge of the wire hole 25. If offset occurs, loosen the bottom hole bolt 103, rotate the workbench 4 as a whole for fine adjustment, and continue to observe until the laser light remains at the upper edge of the wire hole 25 without offset during the forward or backward process of the X-axis linear motor 10, which indicates that the displacement direction is consistent with the actual direction of the X-axis and Y-axis of the vertical coordinate measuring machine 22, and tighten the bottom hole bolt 103 to proceed to the next step;

[0056] Step 4) Select the manual mode in the operation panel 21, and use the forward and backward buttons to control the X and Y linear motors to adjust the H-type contact wire mechanism 18 so that the vertical line 24 is in one of the two inner groove areas of the H-type contact wire mechanism 18;

[0057] Step 5) Verify the accuracy of the vertical line system displacement in the upstream and downstream directions:

[0058] The upstream and downstream directions are the Y direction, and the downstream direction is positive; select the manual mode of the Y-direction linear motor 11 on the operation panel 21, and select the direction as "+". When the H-type contact wire mechanism 18 touches the vertical line 24, the linear motor automatically stops and emits a prompt sound. At this time, use an external small instrument or the display reading on the vertical coordinate meter to measure the initial value of the Y-direction displacement b for five consecutive times. y1 ~b y5 , and find its average value B y0 ; Select the automatic mode on the operation panel 21, and select the corresponding stroke A from "5mm, 10mm, 20mm, 50mm" according to the test requirements y After the linear motor accurately gives the vertical line 24 corresponding displacement according to the specified stroke, the measured value b after reading the Y-direction displacement change five times in a row y6 ~b y10 , find its average value B y1 , calculate the change in displacement B measured by the vertical coordinate measuring machine in the Y direction y =B y1 -B y0 ;

[0059] Switch to manual mode on the operation panel 21, return the H-type contact wire mechanism 18 to its original position, and after the vertical line 24 is stable, repeat this operation in the opposite direction (direction selection is "-") to check the accuracy of displacement in the upstream direction;

[0060] Step 6) Verify the accuracy of the vertical line system displacement in the left and right bank directions:

[0061] The left and right banks are the X direction, and the right bank is positive; place the vertical line 24 in one of the two slot areas of the H-type contact wire mechanism 18, so that it is in a free state and stable, operate the X-axis linear motor 10 in manual mode, and the direction selection depends on the situation (when the vertical line is in the right slot area, select "+" to verify the displacement to the right bank, and when the vertical line is in the left slot area, select "-" to verify the displacement to the left bank); according to step 5) when the X-axis linear motor 10 stops and emits a prompt sound, first measure the initial value b of the X-axis displacement of the vertical line x1 ~b x5 , find its average value B x0 , switch to automatic mode and select trip A x Given the corresponding displacement of the vertical line 24, the measured value b after the X-direction displacement change is measured x6 ~b x10 , calculate the average value B x1 And the displacement change B measured in the X direction x =B x1 -B x0 ;

[0062] Return the H-type contact wire mechanism 18 to its original position, operate the X-direction linear motor 10 in manual mode to place the vertical line outside the H-type contact wire mechanism, and combine the X-direction and Y-direction linear motors to place the vertical line in another slot area of ​​the H-type contact wire mechanism 18. After the vertical line 24 is stable, repeat this operation in the opposite direction to verify the displacement accuracy of the left and right banks in the other direction;

[0063] Step 7) Calculate the absolute value of the difference between the displacement change measured in the X and Y directions and the standard displacement according to the following formula: x |、|δ y |:

[0064]

[0065]

[0066] And compared with the limit error μ required by the specification, when |δ x |or|δ y |>μ, the accuracy of this measuring point of the vertical line system does not meet the requirements. x |with|δ y | are all ≤μ, the accuracy of this measuring point of the plumb line system meets the requirements.

[0067] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0068] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An automated device for checking the accuracy of a plumb line system, characterized in that: It includes a work table that can be horizontally leveled, the work table is detachably arranged on the vertical coordinate instrument, a plurality of guide grooves are arranged on the work table, a slider that slides back and forth along the guide grooves is arranged in the guide grooves, a motor I is arranged on the upper part of the slider, a strip measuring rod that can reciprocate vertically is arranged at one end of the motor I, a motor II is arranged at the lower part of the strip measuring rod, a laser is arranged at the bottom of the motor II for emitting a laser to the through hole of the vertical system, an H-type line contact mechanism is arranged at one end of the motor II, and a through hole of the vertical system is arranged at one end of the H-type line contact mechanism away from the mover of the motor II, both the motor I and the motor II are arranged in manual and automatic modes, the H-type line contact mechanism cooperates with the motor I and the motor II to achieve a precise displacement of the vertical line at a suitable position during the calibration process; The laser is arranged in the middle of the motor II stator near the H-type contact wire mechanism, and a laser switch is arranged at the end. The angle between the central axis of the laser and the horizontal plane is 30°, and the light emitted by the laser can reach the edge of the wire hole of the vertical line system. The motor I and the motor II are respectively connected to the control module and controlled by the control module; The motor I is an X-axis linear motor, the X-axis linear motor stator of the X-axis linear motor is fixed on the upper part of the slider, the X-axis linear motor adopts a T-slot nested slide rail structure, the X-axis linear motor mover is a rectangular slot nested structure, a cantilever slide groove is arranged at the inner end of the X-axis linear motor mover, and a rectangular empty groove is arranged in the middle of the cantilever slide groove, so that the strip measuring rod can move vertically back and forth in the cantilever slide groove; The laser is a directional laser, and the motor II is a Y-axis linear motor. The Y-axis linear motor adopts a rectangular nested structure. A directional laser is arranged at the bottom of the stator of the Y-axis linear motor, which is used to emit a laser to the upper edge of the vertical line system through-hole when the Y-axis linear motor is adjusted to a position slightly higher than the through-hole. An H-type wire-contacting mechanism is arranged at one end of the Y-axis linear motor mover, and a conductive copper sheet is arranged on the inner side of the H-type wire-contacting mechanism. The conductive copper sheet is connected to the control module. When the H-type wire-contacting mechanism contacts the vertical line, the circuit is connected and a signal is sent to the control module, so that the motor in the corresponding direction is controlled to stop moving through the control module.

2. An automated device for checking the accuracy of a vertical line system according to claim 1, characterized in that: The work table is set on the plumb line coordinate instrument through the triangular base at the bottom thereof, a plurality of foot screws are evenly arranged at the bottom of the work table, a circular level is set on the top of the work table, and N linear slide rails are set on the work table to form N-1 guide grooves.

3. An automated device for checking the accuracy of a vertical line system according to claim 2, characterized in that: The triangular base is provided with bolt holes, and the workbench is fixed to the triangular base by means of bottom hole bolts inserted into the bolt holes. A magnetic base is built into the bottom of the triangular base, and the magnetic base is connected to a handle switch. The adsorption and separation with the plumb line coordinate measuring machine are achieved by turning the handle switch.

4. An automated device for checking the accuracy of a vertical line system according to claim 2, characterized in that: N is 3. The workbench is provided with three straight slide rails at equal distances from the left edge inward, which are the inner slide rail, the middle slide rail and the outer slide rail, respectively. The inner slide rail and the outer slide rail are at the same height and both are lower than the height of the middle slide rail. The inner slide rail and the middle slide rail form an inner guide groove, and the middle slide rail and the outer slide rail form an outer guide groove. A magnetic seat is provided at the bottom of the slider in the inner guide groove, and the bottom of the slider in the outer guide groove is a hollow structure.

5. The automated device for checking the accuracy of a vertical line system according to claim 1, characterized in that: The positioning accuracy of the X-axis linear motor and the Y-axis linear motor are both higher than ±10 μm, the total stroke is 200-300 mm, and the linear movement speed is 2-5 mm / s.

6. An automated device for checking the accuracy of a vertical line system according to claim 1, characterized in that: The strip measuring rod is provided with several rows of positioning holes from top to bottom, with two in each row. Two bolt through holes are horizontally provided on the cantilever slide groove and are equipped with locking nuts. The positioning holes are adapted to the bolt through holes. The locking nuts pass through the bolt through holes and the positioning holes on the strip measuring rod from the outside of the cantilever slide groove to fix the strip measuring rod at a suitable height.

7. A method for verifying the accuracy of a vertical line system according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1) Select a suitable position to place the triangular base and the work table on it on the vertical coordinate machine, adjust the foot screws at the bottom of the work table, at least three foot screws are under stress, and adjust the circular level to keep the work table in a horizontal and stable state; Step 2) The slider is stuck in the guide groove, and the height of the strip measuring rod is adjusted to change the height of the H-type wire contact mechanism. When the H-type wire contact mechanism is adjusted to a height slightly higher than the wire hole, it is tightened, and the X-axis linear motor and the Y-axis linear motor are controlled by the control module to move the H-type wire contact mechanism closer to the edge of the wire hole; Step 3) Turn on the laser switch, direct the laser to emit laser light to the upper edge of the wire hole, operate the X-axis linear motor to move forward or backward, and observe whether the laser light is offset at the upper edge of the wire hole. If offset occurs, adjust the position of the work table until the laser light remains at the upper edge of the wire hole without offset during the forward or backward process of the X-axis linear motor, so that the displacement direction is consistent with the actual direction of the X-axis and Y-axis of the vertical coordinate measuring machine; Step 4) adjusting the position of the H-type contact wire mechanism by controlling the X-axis linear motor and the Y-axis linear motor so that the vertical line is in one of the two inner groove areas of the H-type contact wire mechanism; Step 5) Verify the accuracy of the vertical line system displacement in the upstream and downstream directions: The upstream and downstream directions are the Y direction, with the downstream direction being positive. Select the manual mode of the Y-direction linear motor. When the H-type contact wire mechanism touches the vertical line, the Y-direction linear motor stops moving. Use an external small instrument or the built-in display reading on the vertical coordinate meter to test the initial value b of the Y-direction displacement for five consecutive times. y1 ~b y5 And find the average value B y0 Then select the Y-axis linear motor automatic mode, and control the Y-axis linear motor to follow the specified stroke A y After accurately giving the corresponding displacement of the vertical line, the measured value b after five consecutive tests of the Y-direction displacement change y6 ~b y10 And find the average value B y1 Finally, the displacement change B measured by the vertical coordinate measuring machine in the Y direction is calculated. y =B y1 -B y0 ; Switch the Y-axis linear motor to manual mode, return the H-type contact wire mechanism to its original position, and repeat the operation in the opposite direction to verify the accuracy of displacement in the upstream direction; Step 6) Verify the accuracy of the vertical line system displacement in the left and right bank directions: The left and right banks are the X direction, and the right bank is positive. Place the vertical line in one of the two slot areas of the H-type contact line mechanism, so that it is in a free state and stable. Then control the X-axis linear motor to move in manual mode. When the H-type contact line mechanism touches the vertical line, the X-axis linear motor stops moving. Use an external small instrument or the display reading on the vertical coordinate meter to test the initial value of the X-axis displacement b for five consecutive times. x1 ~b x5 And find the average value B x0 Then select the X-axis linear motor automatic mode, and control the X-axis linear motor to follow the specified stroke A x After accurately giving the corresponding displacement of the vertical line, the measured value b after five consecutive tests of the X-direction displacement change x6 ~b x10 And find the average value B x1 Finally, the displacement change B measured by the vertical coordinate machine in the X direction is calculated. x =B x1 -B x0 ; Return the H-type contact wire mechanism to its original position, operate the X-axis linear motor in manual mode to place the vertical line outside the H-type contact wire mechanism, and use the X-axis linear motor and the Y-axis linear motor to place the vertical line in another slot area of ​​the H-type contact wire mechanism. After the vertical line is stable, repeat the operation in the opposite direction to verify the displacement accuracy in the other direction of the left and right banks; Step 7) Calculate the absolute value of the difference between the displacement change measured in the X and Y directions and the standard displacement according to the following formula |δ x |、|δ y |: Then, |δ x |、|δ y |Compared with the tolerance μ required by the specification, when |δ x |or|δ y |>μ, the accuracy of this measuring point of the vertical line system does not meet the requirements. x |with|δ y | are all ≤μ, the accuracy of this measuring point of the plumb line system meets the requirements.

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