Automatic calibration device and automatic calibration method for geometric parameter measuring instrument of overhead line system

Abstract

The invention discloses an automatic calibration device and method for a contact network geometric parameter measuring instrument, the automatic calibration device comprises a first operation table and a second operation table, the first operation table is provided with a laser range finder, the contact network geometric parameter measuring instrument and a prism, and the second operation table is horizontally provided with a second support in a sliding manner. A first straight line fine adjustment assembly and a line pattern plate are arranged on the second support, a left lifting fine adjustment assembly and a right lifting fine adjustment assembly are arranged between the first straight line fine adjustment assembly and the line pattern plate, the left lifting fine adjustment assembly and the right lifting fine adjustment assembly are both used for adjusting the height of the line pattern plate, and a second level gauge is arranged on the line pattern plate. A plurality of scale marks are arranged on the line pattern plate; scale marks on the line pattern plate are divided into two scale measuring plates. Compared with the prior art, the calibrating device provided by the invention realizes automatic, continuous and digital calibration of the contact line height value and the pull-out value of the geometric parameter measuring instrument of the overhead line system. The whole structure is simple, and the calibrating device is convenient to debug.

Description

Technical Field

[0001] The invention relates to the technical field of calibration of a contact network geometric parameter measuring instrument, and in particular to an automatic calibration device and an automatic calibration method for a contact network geometric parameter measuring instrument. Background Art

[0002] At present, with the rapid development of rail transit technology, the use of contact network geometry parameter measuring instruments is becoming more and more extensive. As a key measuring instrument in the rail transit industry, the scientificity, accuracy and applicability of its metrological traceability are very important. Therefore, the relevant research on the calibration device and calibration method of such measuring instruments is of great importance. The patent with announcement number CN115371559B discloses a calibration method for the indication error of the contact network geometry parameter measuring instrument. A plane reflector is set directly above the contact network geometry parameter measuring instrument. The plane reflector deflects the measuring light of the contact network geometry parameter measuring instrument by 90°. A simulated contact line is set on one side of the contact network geometry parameter measuring instrument. The simulated contact line is located on the optical axis in the horizontal direction. The simulated contact line can move freely in the horizontal direction; the simulated contact line is positioned at the first point to the fifth point, and the actual distance of the simulated contact line from the plane reflector to the contact network geometry parameter measuring instrument is manually measured. While moving, the position of the simulated contact line at that time is measured with the contact network geometry parameter measuring instrument, and the indication error of each point position is obtained by calculation. The calibration method does not specifically disclose how to calibrate the pull-out value indication calibration of the contact network geometry parameter measuring instrument. Secondly, the height indication calibration of the contact network geometric parameter measuring instrument adopts manual measurement, which has the defects of low efficiency and low precision. Summary of the invention

[0003] The invention provides an automatic calibration device and an automatic calibration method for a contact network geometric parameter measuring instrument, which are used to solve the problems of low efficiency and low precision of the existing calibration device using manual measurement and the difficulty in calibrating the pull-out value indication of the contact network geometric parameter measuring instrument.

[0004] The invention provides an automatic calibration device for a contact network geometric parameter measuring instrument, comprising a first operating table and a second operating table, wherein a laser rangefinder, a contact network geometric parameter measuring instrument and a prism are arranged on the first operating table, a second bracket is horizontally slidably mounted on the second operating table, a first straight line fine-tuning component and a line pattern plate are arranged on the second bracket, a left lifting fine-tuning component and a right lifting fine-tuning component are arranged between the first straight line fine-tuning component and the line pattern plate, the left lifting fine-tuning component and the right lifting fine-tuning component are both used to adjust the height of the line pattern plate, a second level is arranged on the line pattern plate, and a plurality of scale lines are arranged on the line pattern plate; the scale lines on the line pattern plate are divided into two scale plates, and the two scale plates share a zero-degree scale line, the direction in which the first straight line fine-tuning component drives the line pattern plate to slide is perpendicular to the direction in which the second bracket drives the line pattern plate to slide, and the laser emitted by the contact network geometric parameter measuring instrument and the laser emitted by the laser rangefinder are reflected by the prism and irradiated on the line pattern plate.

[0005] Preferably, the contact network geometric parameter measuring instrument is arranged between the two laser rangefinders.

[0006] Preferably, a first bracket is horizontally slidably disposed on the first operating table, the laser rangefinder moves up and down along the first bracket, and the prism is disposed at the upper end of the first bracket.

[0007] Preferably, the prism is mounted on the first bracket via a first fine-tuning mechanism.

[0008] Preferably, a lifting and lowering adjustment component for adjusting the height of the line plate is provided between the first straight line fine-tuning component and the second bracket.

[0009] Preferably, a screw slider module is provided between the lifting adjustment component and the second operating platform, and the screw slider module is connected to a servo motor.

[0010] Preferably, a second linear fine-tuning component is provided between the first linear fine-tuning component and the lifting adjustment component, and the direction in which the linear plate is driven to move by the first linear fine-tuning component is perpendicular to the direction in which the linear plate is driven to move by the second linear fine-tuning component.

[0011] Preferably, a first sliding block is fixed to the lower end of the first bracket, and the first sliding block slides along a first linear guide rail on the first operating table.

[0012] The present invention also provides a method for automatically calibrating a contact network geometric parameter measuring instrument, comprising the above-mentioned automatic calibration device for the contact network geometric parameter measuring instrument, and further comprising the following steps:

[0013] Device commissioning before calibration

[0014] Referring to the second level, the left lifting and lowering fine-tuning components and the right lifting and lowering fine-tuning components are adjusted to make the line pattern plate parallel to the horizontal plane; the contact network geometry parameter measuring instrument is started, and the laser emitted by the contact network geometry parameter measuring instrument is irradiated on the line pattern plate through the prism, and the line pattern plate is driven to move through the first straight line fine-tuning component, so that the laser emitted by the contact network geometry parameter measuring instrument irradiates the zero point scale line of the line pattern plate;

[0015] Height value indication verification of overhead contact network geometric parameter measuring instrument:

[0016] S1: Start the laser rangefinder and drive the second bracket to slide away from the prism. When the line plate slides to point W1, the line plate stops sliding. At the W1 calibration point, the reading of the laser rangefinder is 5100m, the contact line height reading of the contact network geometry parameter measuring instrument is x1mm, and the indication error of the contact line height value at the W1 calibration point is (x1-5100)mm.

[0017] S2: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W2, the line plate stops sliding. At the W2 calibration point, the reading of the laser rangefinder is 5500m, the contact line height reading of the contact network geometric parameter measuring instrument is x2mm, and the indication error of the contact line height value at the W2 calibration point is (x2-5500)mm.

[0018] S3: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W3, the line plate stops sliding. At the W3 calibration point, the reading of the laser rangefinder is 5900m, and the contact line height reading of the contact network geometric parameter measuring instrument is x3mm. The indication error of the contact line height value at the W3 calibration point is (x3-5900)mm;

[0019] S4: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W4, the line plate stops sliding. At the W4 calibration point, the reading of the laser rangefinder is 6500m, the contact line height reading of the contact network geometry parameter measuring instrument is x4mm, and the indication error of the contact line height value at the W4 calibration point is (x4-6500)mm; the indication calibration of the contact line height value of the measuring instrument is completed;

[0020] Pull-out value indication verification of contact network geometric parameter measuring instrument:

[0021] A1: Slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ1, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 150mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 11 , the pull-out value indication error at the θ1 calibration point is (y 11 -150)mm;

[0022] A2: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ2, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 300mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 12 , the pull-out value indication error at the θ2 calibration point is (y 12 -300)mm;

[0023] A3: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ3, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 450mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 13 , the pull-out value indication error at the θ3 calibration point is (y 13 -450)mm;

[0024] A4: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ4, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 600mm position of the scale plate on the left. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 14 , the pull-out value indication error at the θ4 calibration point is (y 14 -600)mm; complete the positive stroke verification of the pull-out value of the contact network geometric parameter measuring instrument;

[0025] A5: The laser emitted by the contact network geometry parameter measuring instrument returns to the zero scale line of the line pattern plate. Slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ5, the laser emitted by the contact network geometry parameter measuring instrument irradiates the 150mm position of the scale plate on the right. Stop rotating the laser head. The pull-out value reading of the contact network geometry parameter measuring instrument is y 21 , the pull-out value indication error at the θ5 calibration point is (y 21 -150)mm;

[0026] A6: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ6, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 300mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 22 , the pull-out value indication error at the θ6 calibration point is (y 22 -300)mm;

[0027] A7: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ7, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 450mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 33 , the pull-out value indication error at the θ7 calibration point is (y 33 -450)mm;

[0028] A8: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ8, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 600mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 44 , the pull-out value indication error at the θ8 calibration point is (y 44 -600)mm; complete the negative stroke calibration of the pull-out value of the contact network geometric parameter measuring instrument.

[0029] Preferably, in the height value indication calibration of the contact network geometric parameter measuring instrument, before step S1, the first bracket is moved to drive the laser rangefinder to move horizontally, so that the lasers emitted by the two laser rangefinders are irradiated on both sides of the zero point scale line on the linear plate; in step S1, at the W1 calibration point, the average value of the readings of the two laser rangefinders is 5100mm; in step S2, at the W2 calibration point, the average value of the readings of the two laser rangefinders is 5500mm; in step S3, at the W3 calibration point, the average value of the readings of the two laser rangefinders is 5900mm; in step S4, at the W4 calibration point, the average value of the readings of the two laser rangefinders is 6500mm.

[0030] Compared with the prior art, the calibration device of the present invention realizes the automated, continuous and digital calibration of the contact line height value and the pull-out value of the contact network geometry parameter measuring instrument. The calibration can also be quickly realized for different calibration points of these two key parameters. After the metrological calibration test, the calibration accuracy, repeatability and stability are greatly improved. The overall structure is simple and the calibration device is easy to debug. After completing the calibration of the height value indication of the contact network geometry parameter measuring instrument, the calibration of the pull-out value indication does not require re-debugging of the calibration device, which can effectively improve the calibration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a partial structural schematic diagram of the contact network geometric parameter measuring instrument of the present invention;

[0034] Figure 3 It is a partial structural schematic diagram of the stripe plate of the present invention;

[0035] Figure 4 It is a schematic structural diagram of the stripe plate of the present invention.

[0036] Reference numerals:

[0037] 1. The first operating table, 2. The second operating table, 3. The laser rangefinder, 4. The contact network geometry parameter measuring instrument, 5. The prism, 6. The second bracket, 7. The first straight line fine-tuning assembly, 8. The left lifting fine-tuning assembly, 9. The right lifting fine-tuning assembly, 10. The second level, 11. The scale plate, 12. The first bracket, 13. The first fine-tuning mechanism, 14. The lifting adjustment assembly, 15. The lead screw slider module, 16. The second straight line fine-tuning assembly, 17. The first slider, 18. The first linear guide rail, 19. The laser instrument mounting plate, 20. The second fine-tuning mechanism, 21. The laser, 22. The line pattern plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See attached Figure 1The present embodiment provides an automatic calibration device for a contact network geometric parameter measuring instrument, comprising a first operating platform 1 and a second operating platform 2. The first operating platform 1 is provided with a laser rangefinder 3, a contact network geometric parameter measuring instrument 4 and a prism 5. The inclination angle of the prism 5 is 45°. The laser rangefinder 3 and the contact network geometric parameter measuring instrument 4 are both located below the prism 5. A second bracket 6 is horizontally slidable on the second operating platform 2. The second bracket 6 is provided with a first linear fine-tuning component 7 and a line pattern plate 22. The line pattern plate 22 is illuminated by the laser. The plane of projection is perpendicular to the horizontal plane. A left lifting fine-tuning component 8 and a right lifting fine-tuning component 9 are provided between the first straight line fine-tuning component 7 and the line pattern plate 22. The left lifting fine-tuning component 8 and the right lifting fine-tuning component 9 are both hinged to the line pattern plate 22. The left lifting fine-tuning component 8 and the right lifting fine-tuning component 9 are both used to adjust the height of the line pattern plate 22. A second level 10 is provided on the line pattern plate 22. The second level 10 is located between the left lifting fine-tuning component 8 and the right lifting fine-tuning component 9. A plurality of scale lines are provided on the line pattern plate 22; refer to the attached Figure 4, the scale lines on the pattern plate 22 are divided into two scale plates 11, the zero scale line of the scale plate 11 is located in the middle of the pattern plate 22, and the two scale plates 11 share the zero scale line. The horizontal position of the pattern plate 22 is the same as the horizontal position of the prism 5, the direction in which the first linear fine-tuning component 7 drives the pattern plate 22 to slide is perpendicular to the direction in which the second bracket 6 drives the pattern plate 22 to slide, and the second bracket 6 drives the pattern plate 22 to slide, thereby changing the distance between the pattern plate 22 and the prism 5, and the laser 21 emitted by the contact network geometry parameter measuring instrument 4 and the laser 21 emitted by the laser rangefinder 3 are reflected by the prism 5 and irradiated on the pattern plate 22. In the present invention, the second level 10 is observed to adjust the left lifting fine-tuning component 8 and the right lifting fine-tuning component 9 to make the pattern plate 22 parallel to the horizontal plane, so as to ensure that when the laser head of the contact network geometry parameter measuring instrument 4 is rotated, the path of the laser 21 emitted by it scanning on the pattern plate 22 is perpendicular to the scale lines. The first linear fine-tuning component 7 drives the line plate 22 to slide so that the laser 21 emitted by the contact network geometry parameter measuring instrument 4 is irradiated on the zero-degree scale line, completing the debugging of the calibration device. The laser 21 emitted by the contact network geometry parameter measuring instrument 4 and the laser 21 emitted by the laser rangefinder 3 are first perpendicular to the horizontal plane, and then reflected by the prism 5 and irradiated on the line plate 22 in a posture parallel to the horizontal plane. The laser 21 between the prism 5 and the line plate 22 is perpendicular to the line plate 22. This structural design can calibrate the height value indication of the contact network geometry parameter measuring instrument 4 through the measurement value of the laser rangefinder 3. The laser head of the contact network geometry parameter measuring instrument 4 is rotated, and the laser 21 is irradiated on the scale plate 11, so that the pull-out value indication of the contact network geometry parameter measuring instrument 4 can be calibrated through the scale value on the scale plate 11. The design of the two scale plates 11 can conveniently calibrate the pull-out value positive stroke indication and negative stroke indication of the contact network geometry parameter measuring instrument 4. The overall structure is simple, and it can automatically complete the calibration of the height value indication and the pull-out value indication of the contact network geometric parameter measuring instrument 4, with good calibration effect and high efficiency. The calibration device is easy to debug. After completing the calibration of the height value indication of the contact network geometric parameter measuring instrument 4, the calibration of the pull-out value indication does not require re-debugging of the calibration device, which can effectively improve the calibration efficiency.

[0040] Specifically, the scale values ​​on the two scale plates 11 are both 700 mm (U=0.05 mm, k=2), which meets the metrological characteristic requirements of the industry for tracing the value of the pull-out value when implementing calibration.

[0041] Specifically, the maximum permissible error MPE of the laser rangefinder 3 is ±0.05 mm, which meets the metrological characteristic requirements of the industry for tracing the value of the contact line height when calibrating the contact line height.

[0042] As another embodiment of the present invention: Figure 2The contact network geometry parameter measuring instrument 4 is arranged between the two laser rangefinders 3. Specifically, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 is located between the lasers 21 emitted by the two laser rangefinders 3. The height value indication of the contact network geometry parameter measuring instrument 4 is calibrated by the average value of the measurement values ​​of the two laser rangefinders 3, which can effectively offset some errors.

[0043] As another embodiment of the present invention: a first bracket 12 is horizontally slid on the first operating table 1, and the laser rangefinder 3 moves up and down along the first bracket 12 to ensure that the distances between the two laser rangefinders 3 and the prism 5 are equal. The prism 5 is arranged at the upper end of the first bracket 12. The two laser rangefinders 3 are moved as a whole by this arrangement, so that the contact network geometry parameter measuring instrument 4 is conveniently located between the two laser rangefinders 3. In this embodiment, in order to make the structure compact, the two laser rangefinders 3 are located above the contact network geometry parameter measuring instrument 4 to avoid interference between the positions of the laser rangefinder 3 and the contact network geometry parameter measuring instrument 4, but the laser 21 emitted by the contact network geometry parameter measuring instrument 4 is located between the lasers 21 emitted by the two laser rangefinders 3. The difference between the distance from the contact network geometry parameter measuring instrument 4 to the prism 5 and the distance from the laser rangefinder 3 to the prism 5 is completed by compensation during calibration. One embodiment is to set it on the laser rangefinder 3, add the difference, and make the indication displayed by the laser rangefinder 3 the sum of the actual distance and the difference. For example, if the difference is 1000 mm and the actual distance is 4100 mm, the value displayed by the laser rangefinder 3 is 5100 mm.

[0044] As another embodiment of the present invention: the prism 5 is mounted on the first bracket 12 via a first fine-tuning mechanism 13, and the first fine-tuning mechanism 13 is used to adjust the pitch angle of the prism 5 to ensure that the inclination angle of the prism 5 is 45°.

[0045] As another embodiment of the present invention: Figure 3 A lifting and adjusting assembly 14 for adjusting the height of the pattern plate 22 is provided between the first linear fine-tuning assembly 7 and the second bracket 6. The lifting and adjusting assembly 14 can adjust the height of the pattern plate 22 in a wide range, so that the horizontal position of the pattern plate 22 is the same as that of the prism 5, ensuring that the laser 21 reflected from the prism 5 can be irradiated on the pattern plate 22. Compared with adjusting the height of the pattern plate 22 by the left lifting and fine-tuning assembly 8 and the right lifting and fine-tuning assembly 9, the lifting and adjusting assembly 14 only needs to be adjusted once.

[0046] As another embodiment of the present invention: a lead screw slider module 15 is provided between the lifting adjustment component 14 and the second operating table 2, and the lead screw slider module 15 is connected to a servo motor. The travel range of the lead screw slider module 15 is 1500mm. When the line pattern plate 22 is located at one end of the lead screw slider module 15 close to the prism 5, the distance between the geometric center point of the prism 5 and the line pattern plate 22 is 4600mm, which meets the requirements of the industry for the value of the contact line height when the contact line height value is verified. At this time, the distance from the contact network geometric parameter measuring instrument 4 to the prism 5 is 500mm.

[0047] As another embodiment of the present invention, a second linear fine-tuning component 16 is provided between the first linear fine-tuning component 7 and the lifting adjustment component 14, and the direction in which the line pattern plate 22 is driven by the first linear fine-tuning component 7 to move is perpendicular to the direction in which the line pattern plate 22 is driven by the second linear fine-tuning component 16 to move. The second linear fine-tuning component 16 is used to adjust the distance from the line pattern plate 22 to the prism 5.

[0048] An implementation of the second operating platform 2: The second operating platform 2 includes a second base and a plurality of second fine-tuning lifting mechanisms, and the second fine-tuning lifting mechanisms are arranged between the second base and the screw slider module 15. In this structural design, the screw slider module 15 is parallel to the horizontal plane through the second fine-tuning lifting mechanisms.

[0049] As another embodiment of the present invention: a laser instrument mounting plate 19 is slidably provided on the first bracket 12, and the laser rangefinder 3 is mounted on the laser instrument mounting plate 19 through a second fine-tuning mechanism 20, and the laser instrument mounting plate 19 slides up and down along the first bracket 12, thereby adjusting the height of the laser rangefinder 3. The second fine-tuning mechanism 20 is used to adjust the horizontal angle and the pitch angle of the laser rangefinder 3 to ensure that the laser 21 emitted by the laser rangefinder 3 is perpendicular to the horizontal plane. The second fine-tuning mechanism 20 can also be used to adjust the horizontal position of the laser rangefinder 3, thereby ensuring that the laser 21 emitted by the laser rangefinder 3 and the laser 21 emitted by the contact network geometric parameter measuring instrument 4 are located on the same plane.

[0050] An implementation manner in which the first bracket 12 moves on the first operating table 1 is as follows: a first slider 17 is fixed to the lower end of the first bracket 12 , and the first slider 17 slides along a first linear guide rail 18 on the first operating table 1 . The first linear guide rail 18 is perpendicular to the lead screw slider module 15 .

[0051] Specifically, the contact network geometric parameter measuring instrument 4 includes: a ruler, a laser head and a display screen.

[0052] As another embodiment of the present invention: the body of the contact network geometric parameter measuring instrument 4 is installed on the first operating table 1 through two gauge standard blocks, the distance between the two gauge standard blocks is 1435mm, and the distance from the gauge standard block to the geometric center point of the prism 5 is 500mm.

[0053] An embodiment of the first operating platform 1: The first operating platform 1 includes: a bottom plate, a first base and a plurality of first fine-adjustment lifting mechanisms, the first fine-adjustment lifting mechanisms are arranged between the first base and the bottom plate, a first level is arranged on the bottom plate, and a track gauge standard block and a first linear guide rail 18 are both arranged on the bottom plate. The present invention adjusts the first fine-adjustment lifting mechanism by observing the first level to make the bottom plate in a horizontal state.

[0054] As another embodiment of the present invention: the first bracket 12 includes two support columns, the two laser instrument mounting plates 19 slide up and down along the two support columns respectively, the prism mounting plate is fixed on the upper ends of the two support columns, the prism 5 is mounted on the prism mounting plate through the first fine-tuning mechanism 13, and the lower end of the support column is fixedly connected to the first slider 17.

[0055] Specifically, the length of the prism 5 is greater than the distance between the two laser rangefinders 3 .

[0056] Specifically, different positioning holes are arranged on the bottom plate, and the distance between the two gauge standard blocks can be adjusted by placing the gauge standard blocks into the different positioning holes.

[0057] The present invention also provides a method for automatically calibrating a contact network geometric parameter measuring instrument, comprising the above-mentioned automatic calibration device for the contact network geometric parameter measuring instrument, and further comprising the following steps:

[0058] Device commissioning before calibration

[0059] Referring to the second level 10, the left lifting fine-tuning assembly 8 and the right lifting fine-tuning assembly 9 are adjusted to make the line pattern plate 22 parallel to the horizontal plane; the contact network geometry parameter measuring instrument 4 is started, and the laser 21 emitted by the contact network geometry parameter measuring instrument 4 is irradiated on the line pattern plate 22 through the prism 5, and the line pattern plate 22 is driven to move through the first straight line fine-tuning assembly 7, so that the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the zero point scale line of the line pattern plate 22;

[0060] Height value indication verification of contact network geometric parameter measuring instrument 4:

[0061] S1: Start the laser rangefinder 3, drive the second bracket 6 to slide in the direction away from the prism 5, and when the line plate 22 slides to the W1 point, the line plate 22 stops sliding; at the W1 calibration point, the reading of the laser rangefinder 3 is 5100m, the contact line height reading of the contact network geometric parameter measuring instrument 4 is x1mm, and the indication error of the contact line height value at the W1 calibration point is (x1-5100)mm;

[0062] S2: Continue to drive the second bracket 6 to slide in the direction away from the prism 5. When the line plate 22 slides to the W2 point, the line plate 22 stops sliding. At the W2 calibration point, the reading of the laser rangefinder 3 is 5500m, the contact line height reading of the contact network geometric parameter measuring instrument 4 is x2mm, and the indication error of the contact line height value at the W2 calibration point is (x2-5500)mm.

[0063] S3: Continue to drive the second bracket 6 to slide in the direction away from the prism 5. When the pattern plate 22 slides to the W3 point, the pattern plate 22 stops sliding. At the W3 calibration point, the reading of the laser rangefinder 3 is 5900m, and the contact line height reading of the contact network geometric parameter measuring instrument 4 is x3mm. The indication error of the contact line height value at the W3 calibration point is (x3-5900)mm.

[0064] S4: Continue to drive the second bracket 6 to slide in the direction away from the prism 5. When the line plate 22 slides to the W4 point, the line plate 22 stops sliding. At the W4 calibration point, the reading of the laser rangefinder 3 is 6500m, the contact line height reading of the contact network geometric parameter measuring instrument 4 is x4mm, and the indication error of the contact line height value at the W4 calibration point is (x4-6500)mm; the indication calibration of the measuring instrument contact line height value is completed;

[0065] Pull-out value indication verification of contact network geometric parameter measuring instrument 4:

[0066] A1: Slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the right. When it rotates to θ1, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 150mm position of the left scale plate 11. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 11 , the pull-out value indication error at the θ1 calibration point is (y 11 -150)mm;

[0067] A2: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the right. When it rotates to θ2, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 300mm position of the scale plate 11 on the left. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 12 , the pull-out value indication error at the θ2 calibration point is (y 12 -300)mm;

[0068] A3: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the right. When it rotates to θ3, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 450mm position of the scale plate 11 on the left. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y. 13, the pull-out value indication error at the θ3 calibration point is (y 13 -450)mm;

[0069] A4: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the right. When it rotates to θ4, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 600mm position of the scale plate 11 on the left. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 14 , the pull-out value indication error at the θ4 calibration point is (y 14 -600)mm; complete the positive stroke verification of the pull-out value of the contact network geometric parameter measuring instrument 4;

[0070] A5: The laser 21 emitted by the contact network geometry parameter measuring instrument 4 returns to the zero point scale line of the line pattern plate 22. The laser head of the contact network geometry parameter measuring instrument 4 is slowly rotated to the left. When it is rotated to θ5, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 150mm position of the scale plate 11 on the right. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 21 , the pull-out value indication error at the θ5 calibration point is (y 21 -150)mm;

[0071] A6: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the left. When it rotates to θ6, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 300mm position of the scale plate 11 on the right. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 22 , the pull-out value indication error at the θ6 calibration point is (y 22 -300)mm;

[0072] A7: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the left. When it rotates to θ7, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 450mm position of the scale plate 11 on the right. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y. 33 , the pull-out value indication error at the θ7 calibration point is (y 33 -450)mm;

[0073] A8: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the left. When it rotates to θ8, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 irradiates the 600mm position of the scale plate 11 on the right. Stop rotating the laser head, and the pull-out value reading of the contact network geometry parameter measuring instrument 4 is y 44 , the pull-out value indication error at the θ8 calibration point is (y 44-600)mm; complete the negative stroke calibration of the pull-out value of the contact network geometric parameter measuring instrument 4.

[0074] As another embodiment of the present invention: in the height value indication calibration of the contact network geometric parameter measuring instrument 4, before step S1, the first bracket 12 is moved to drive the laser rangefinder 3 to move horizontally, so that the lasers 21 emitted by the two laser rangefinders 3 are irradiated on both sides of the zero scale line on the line pattern plate 22, wherein the laser rangefinder 3 is moved up and down so that the distances from the two laser rangefinders 3 to the second operating table 2 are equal. In step S1, at the W1 calibration point, the average value of the readings of the two laser rangefinders 3 is 5100mm; in step S2, at the W2 calibration point, the average value of the readings of the two laser rangefinders 3 is 5500mm; in step S3, at the W3 calibration point, the average value of the readings of the two laser rangefinders 3 is 5900mm; in step S4, at the W4 calibration point, the average value of the readings of the two laser rangefinders 3 is 6500mm.

[0075] In the step of driving the second bracket 6 to slide in a direction away from the prism 5, the servo motor is started, and the screw slider module 15 drives the pattern plate 22 to slide in a direction away from the prism 5, thereby realizing automatic calibration of the height value indication of the contact network geometry parameter measuring instrument 4.

[0076] In the pull-out value indication verification of the contact network geometric parameter measuring instrument 4, the line pattern plate 22 stays at point W1, that is, the average value of the readings of the two laser rangefinders 3 is 5100mm. Move the gauge standard block so that the distance between the two gauge standard blocks is 1435mm.

[0077] In the present invention, the device debugging steps before calibration are simple, and then the height value indication of the contact network geometric parameter measuring instrument 4 is calibrated by the indication of the laser rangefinder 3. In this process, a servo motor is used to drive and automatically collect data, so as to realize the automation of the calibration device. Only one calibrator is required to complete the calibration of the measuring instrument, thereby improving the work efficiency. The laser head of the contact network geometric parameter measuring instrument 4 is rotated, and the laser 21 is irradiated on the scale plate 11, so that the pull-out value indication of the contact network geometric parameter measuring instrument 4 can be calibrated by the scale value on the scale plate 11. The design of the two scale plates 11 can conveniently calibrate the pull-out value positive stroke indication and negative stroke indication of the contact network geometric parameter measuring instrument 4. The overall structure is simple, and the calibration of the height value indication and the pull-out value indication of the contact network geometric parameter measuring instrument 4 can be automatically completed, and the calibration effect is good and the efficiency is high. The calibration device is easy to debug. After completing the calibration of the height value indication of the contact network geometric parameter measuring instrument 4, the calibration of the pull-out value indication does not need to be re-debugged on the calibration device, which can effectively improve the calibration efficiency.

[0078] Secondly, the calibration device of the present invention traces the contact line height value of the measuring instrument to two laser rangefinders 3, reducing the installation error and Abbe error, and further ensuring the traceability accuracy of the contact line height value. Thirdly, the calibration device of the present invention mainly calibrates the contact line height and pull-out value of the contact network geometric parameter measuring instrument 4, traces the contact line height value to the laser rangefinder 3, and traces the pull-out value to the line pattern plate 22, fundamentally improving the accuracy and stability of the traceability of the key parameters of the contact network geometric parameter measuring instrument 4. Fourthly, the calibration device of the present invention realizes the continuity, automation and real-time of the contact line height value and the pull-out value. Based on the requirements of the calibration regulations, the device of the present invention can select different calibration points of the contact line height value and the pull-out value according to the actual needs of the customer. Further, the calibration of the measuring instrument is close to its actual working state. Fifthly, the calibration device of the present invention adopts a modular design, which improves the convenience of processing and assembly of the calibration device, and improves the economy, scalability and applicability.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic calibration device for a contact network geometric parameter measuring instrument, characterized in that: The invention comprises a first operating table and a second operating table, wherein the first operating table is provided with a laser rangefinder, a contact network geometry parameter measuring instrument and a prism, the second operating table is provided with a second bracket sliding horizontally, the second bracket is provided with a first straight line fine-tuning assembly and a line pattern plate, a left lifting fine-tuning assembly and a right lifting fine-tuning assembly are provided between the first straight line fine-tuning assembly and the line pattern plate, the left lifting fine-tuning assembly and the right lifting fine-tuning assembly are both used to adjust the height of the line pattern plate, a second level is provided on the line pattern plate, and a plurality of scale lines are provided on the line pattern plate; the scale lines on the line pattern plate are divided into two scale plates, and the two scale plates share a zero-degree scale line, the direction in which the first straight line fine-tuning assembly drives the line pattern plate to slide is perpendicular to the direction in which the second bracket drives the line pattern plate to slide, and the laser emitted by the contact network geometry parameter measuring instrument and the laser emitted by the laser rangefinder are reflected by the prism and irradiated on the line pattern plate.

2. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 1 is characterized in that: The contact network geometric parameter measuring instrument is arranged between the two laser rangefinders.

3. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 1 is characterized in that: A first bracket is horizontally slidably disposed on the first operating table, the laser rangefinder moves up and down along the first bracket, and the prism is disposed at the upper end of the first bracket.

4. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 3 is characterized in that: The prism is mounted on the first bracket through a first fine-tuning mechanism.

5. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 1 is characterized in that: A lifting and lowering adjustment component for adjusting the height of the line plate is provided between the first straight line fine-tuning component and the second bracket.

6. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 5 is characterized in that: A lead screw slider module is provided between the lifting adjustment component and the second operating platform, and the lead screw slider module is connected to a servo motor.

7. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 6 is characterized in that: A second linear fine-tuning component is provided between the first linear fine-tuning component and the lifting adjustment component. The direction in which the linear pattern plate is driven to move by the first linear fine-tuning component is perpendicular to the direction in which the linear pattern plate is driven to move by the second linear fine-tuning component.

8. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 4 is characterized in that: A first sliding block is fixed to the lower end of the first bracket, and the first sliding block slides along a first linear guide rail on the first operating table.

9. A method for automatically calibrating a contact network geometric parameter measuring instrument, characterized in that: The automatic calibration device for the contact network geometric parameter measuring instrument according to any one of claims 1 to 8 further comprises the following steps: Device commissioning before calibration Referring to the second level, the left lifting and lowering fine-tuning components and the right lifting and lowering fine-tuning components are adjusted to make the line pattern plate parallel to the horizontal plane; the contact network geometry parameter measuring instrument is started, and the laser emitted by the contact network geometry parameter measuring instrument is irradiated on the line pattern plate through the prism, and the line pattern plate is driven to move through the first straight line fine-tuning component, so that the laser emitted by the contact network geometry parameter measuring instrument irradiates the zero point scale line of the line pattern plate; Height value indication verification of overhead contact network geometric parameter measuring instrument: S1: Start the laser rangefinder and drive the second bracket to slide away from the prism. When the line plate slides to point W1, the line plate stops sliding. At the W1 calibration point, the reading of the laser rangefinder is 5100m, the contact line height reading of the contact network geometry parameter measuring instrument is x1mm, and the indication error of the contact line height value at the W1 calibration point is (x1-5100)mm. S2: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W2, the line plate stops sliding. At the W2 calibration point, the reading of the laser rangefinder is 5500m, the contact line height reading of the contact network geometric parameter measuring instrument is x2mm, and the indication error of the contact line height value at the W2 calibration point is (x2-5500)mm. S3: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W3, the line plate stops sliding. At the W3 calibration point, the reading of the laser rangefinder is 5900m, and the contact line height reading of the contact network geometric parameter measuring instrument is x3mm. The indication error of the contact line height value at the W3 calibration point is (x3-5900)mm; S4: Continue to drive the second bracket to slide in the direction away from the prism. When the line plate slides to point W4, the line plate stops sliding. At the W4 calibration point, the reading of the laser rangefinder is 6500m, the contact line height reading of the contact network geometry parameter measuring instrument is x4mm, and the indication error of the contact line height value at the W4 calibration point is (x4-6500)mm; the indication calibration of the contact line height value of the measuring instrument is completed; Pull-out value indication verification of contact network geometric parameter measuring instrument: A1: Slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ1, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 150mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 11 , the pull-out value indication error at the θ1 calibration point is (y 11 -150)mm; A2: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ2, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 300mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 12 , the pull-out value indication error at the θ2 calibration point is (y 12 -300)mm; A3: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ3, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 450mm position of the left scale plate. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 13 , the pull-out value indication error at the θ3 calibration point is (y 13 -450)mm; A4: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the right. When it rotates to θ4, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 600mm position of the scale plate on the left. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 14 , the pull-out value indication error at the θ4 calibration point is (y 14 -600)mm; complete the positive stroke verification of the pull-out value of the contact network geometric parameter measuring instrument; A5: The laser emitted by the contact network geometry parameter measuring instrument returns to the zero scale line of the line pattern plate. Slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ5, the laser emitted by the contact network geometry parameter measuring instrument irradiates the 150mm position of the scale plate on the right. Stop rotating the laser head. The pull-out value reading of the contact network geometry parameter measuring instrument is y 21 , the pull-out value indication error at the θ5 calibration point is (y 21 -150)mm; A6: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ6, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 300mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 22 , the pull-out value indication error at the θ6 calibration point is (y 22 -300)mm; A7: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ7, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 450mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 33 , the pull-out value indication error at the θ7 calibration point is (y 33 -450)mm; A8: Continue to slowly rotate the laser head of the contact network geometry parameter measuring instrument to the left. When it rotates to θ8, the laser emitted by the contact network geometry parameter measuring instrument will illuminate the 600mm position of the scale plate on the right. Stop rotating the laser head, and the contact network geometry parameter measuring instrument will pull out a value reading of y. 44 , the pull-out value indication error at the θ8 calibration point is (y 44 -600)mm; complete the negative stroke calibration of the pull-out value of the contact network geometric parameter measuring instrument.

10. The method for automatically verifying the contact network geometric parameter measuring instrument according to claim 9, characterized in that: In the height value indication calibration of the contact network geometric parameter measuring instrument, before step S1, the first bracket is moved to drive the laser rangefinder to move horizontally, so that the lasers emitted by the two laser rangefinders are irradiated on both sides of the zero point scale line on the wire pattern plate; in step S1, at the W1 calibration point, the average value of the readings of the two laser rangefinders is 5100mm; in step S2, at the W2 calibration point, the average value of the readings of the two laser rangefinders is 5500mm; in step S3, at the W3 calibration point, the average value of the readings of the two laser rangefinders is 5900mm; in step S4, at the W4 calibration point, the average value of the readings of the two laser rangefinders is 6500mm.

Images