Automatic calibrating device for geometric parameter measuring instrument of overhead line system

Abstract

The utility model discloses an automatic calibrating device for a contact network geometric parameter measuring instrument, which comprises a first operating platform and a second operating platform, a laser range finder, a contact network geometric parameter measuring instrument and a prism are arranged on the first operating platform, and a second support is horizontally arranged on the second operating platform 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 utility model realizes the automatic, continuous and digital calibration of the height value and the pull-out value of the contact line 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 utility model relates to the technical field of calibration of contact network geometric parameter measuring instruments, in particular to an automatic calibration device for contact network geometric parameter measuring instruments. Background Art

[0002] With the rapid development of rail transit technology, the use of contact network geometry parameter measuring instruments is becoming more and more widespread. As a key measuring instrument in the rail transit industry, the scientificity, accuracy, and applicability of its metrological traceability are very important. Therefore, the importance of related research on the calibration device and calibration method of such measuring instruments is significant. Patent announcement number CN115371559B discloses a method for calibrating 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 horizontal optical axis and can move freely in the horizontal direction. The simulated contact line is positioned at the first to fifth points, and the actual distance from the simulated contact line to the contact network geometry parameter measuring instrument through the plane reflector is manually measured. While moving, the position of the simulated contact line at that time is measured using the contact network geometry parameter measuring instrument, and the indication error of each point position is obtained by calculation. This 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 calibration of the height value indication of the contact network geometric parameter measuring instrument adopts manual measurement, which has the defects of low efficiency and low precision. Utility Model Content

[0003] The utility model provides an automatic calibration device for a contact network geometric parameter measuring instrument, which is 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 utility model 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 provided 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 provided on the second bracket, a left lifting fine-tuning component and a right lifting fine-tuning component are provided 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 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 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 mounted 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 adjustment component for adjusting the height of the patterned plate is provided between the first linear 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 line plate is driven to move by the first linear fine-tuning component is perpendicular to the direction in which the line plate is driven to move by the second linear fine-tuning component.

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

[0012] Preferably, a laser instrument mounting plate is slidably provided on the first bracket, and the laser rangefinder is mounted on the laser instrument mounting plate via a second fine-tuning mechanism.

[0013] Preferably, the body of the contact network geometric parameter measuring instrument is installed on the first operating table through two gauge standard blocks.

[0014] Compared with the existing technology, the calibration device of the utility model realizes the automated, continuous and digital calibration of the contact line height value and pull-out value of the contact network geometric 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 geometric 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

[0015] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a partial structural diagram of the contact network geometric parameter measuring instrument of the present utility model;

[0018] Figure 3 It is a partial structural diagram of the stripe plate of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the striped plate of the present invention.

[0020] Reference numerals:

[0021] 1. First operating table, 2. Second operating table, 3. Laser rangefinder, 4. Contact network geometry parameter measuring instrument, 5. Prism, 6. Second bracket, 7. First straight line fine-tuning assembly, 8. Left lifting fine-tuning assembly, 9. Right lifting fine-tuning assembly, 10. Second level, 11. Scale plate, 12. First bracket, 13. First fine-tuning mechanism, 14. Lifting adjustment assembly, 15. Screw slider module, 16. Second straight line fine-tuning assembly, 17. First slider, 18. First linear guide rail, 19. Laser instrument mounting plate, 20. Second fine-tuning mechanism, 21. Laser, 22. Linear plate. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Refer to the attached Figure 1 The 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 tilt 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 4The scale lines on the patterned plate 22 are divided into two scale plates 11. The zero-point scale line of the scale plate 11 is located in the middle of the patterned plate 22, and the two scale plates 11 share the zero-degree scale line. The horizontal position of the patterned plate 22 is the same as that of the prism 5. The direction in which the first linear fine-tuning assembly 7 drives the patterned plate 22 to slide is perpendicular to the direction in which the second bracket 6 drives the patterned plate 22 to slide. The second bracket 6 drives the patterned plate 22 to slide, thereby changing the distance between the patterned plate 22 and the prism 5. The laser light 21 emitted by the catenary geometry parameter measuring instrument 4 and the laser rangefinder 3 are reflected by the prism 5 and illuminated by the patterned plate 22. In the present invention, the second level 10 is used to adjust the left and right lift fine-tuning assemblies 8 and 9 to keep the patterned plate 22 parallel to the horizontal plane. This ensures that when the laser head of the catenary geometry parameter measuring instrument 4 rotates, the path of the laser light 21 emitted by it on the patterned plate 22 is perpendicular to the scale lines. The first linear fine-tuning assembly 7 drives the linear plate 22 to slide so that the laser light 21 emitted by the catenary geometry parameter measuring instrument 4 hits the zero-degree scale line, completing the calibration of the calibration device. The laser light 21 emitted by the catenary geometry parameter measuring instrument 4 and the laser rangefinder 3 are first perpendicular to the horizontal plane, then reflected by the prism 5 and then strike the linear plate 22 parallel to the horizontal plane. The laser light 21 between the prism 5 and the linear plate 22 is perpendicular to the linear plate 22. This structural design allows the height indication of the catenary geometry parameter measuring instrument 4 to be calibrated using the measured value of the laser rangefinder 3. The laser head of the catenary geometry parameter measuring instrument 4 rotates, and the laser light 21 strikes the scale plate 11, thereby calibrating the pullout indication of the catenary geometry parameter measuring instrument 4 using the scale values on the scale plate 11. The design of two scale plates 11 facilitates the calibration of the positive and negative pullout indications of the catenary geometry parameter measuring instrument 4. The simple overall structure automatically verifies the height and pullout values of the contact network geometry measuring instrument, achieving effective and efficient verification. The calibration device is easy to debug. After completing the height verification of the contact network geometry measuring instrument, the pullout value verification does not require re-calibration of the calibration device, effectively improving verification efficiency.

[0024] 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 requirement of the industry for traceability of the pull-out value when performing calibration.

[0025] Specifically, the maximum permissible error MPE of the laser rangefinder 3 is ±0.05 mm, which meets the metrological characteristic requirements for traceability of the contact line height when calibrating the contact line height within the industry.

[0026] 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.

[0027] In another embodiment of the present invention, a first bracket 12 slides horizontally on the first operating platform 1. The laser rangefinders 3 move up and down along the bracket 12 to ensure that the two laser rangefinders 3 are at equal distances from the prism 5. The prism 5 is located at the upper end of the first bracket 12. This arrangement allows the two laser rangefinders 3 to move as a whole, facilitating the positioning of the catenary geometry parameter measuring instrument 4 between the two laser rangefinders 3. In this embodiment, to maintain a compact structure, the two laser rangefinders 3 are positioned above the catenary geometry parameter measuring instrument 4 to prevent interference between the laser rangefinders 3 and the catenary geometry parameter measuring instrument 4. However, the laser light 21 emitted by the catenary geometry parameter measuring instrument 4 is positioned between the laser light 21 emitted by the two laser rangefinders 3. The difference between the distance between the catenary geometry parameter measuring instrument 4 and the prism 5 and the distance between the laser rangefinder 3 and the prism 5 is compensated during calibration. One embodiment involves a setting on the laser rangefinder 3 to incorporate the difference so that the displayed value on the laser rangefinder 3 is 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.

[0028] 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 tilt angle of the prism 5 is 45°.

[0029] As another embodiment of the present invention: Figure 3 Between the first linear fine-tuning assembly 7 and the second bracket 6 is a lift adjustment assembly 14 for adjusting the height of the patterned plate 22. This assembly allows for a wide range of height adjustment, ensuring that the horizontal position of the patterned plate 22 is aligned with that of the prism 5, ensuring that the laser beam 21 reflected from the prism 5 is irradiated onto the patterned plate 22. Compared to adjusting the height of the patterned plate 22 via the left and right lift adjustment assemblies 8 and 9, the lift adjustment assembly 14 only needs to be adjusted once.

[0030] In another embodiment of the present invention, a screw slider module 15 is provided between the lift adjustment assembly 14 and the second operating platform 2. The screw slider module 15 is connected to a servo motor. The travel range of the screw slider module 15 is 1500 mm. When the pattern plate 22 is located near the end of the screw slider module 15 near the prism 5, the distance between the geometric center of the prism 5 and the pattern plate 22 is 4600 mm, meeting the industry's requirements for contact line height calibration. At this point, the distance between the contact line geometry parameter measuring instrument 4 and the prism 5 is 500 mm.

[0031] As another embodiment of the present invention, a second linear fine-tuning assembly 16 is provided between the first linear fine-tuning assembly 7 and the lift adjustment assembly 14. The first linear fine-tuning assembly 7 drives the patterned plate 22 to move in a direction perpendicular to the direction in which the second linear fine-tuning assembly 16 drives the patterned plate 22 to move. The second linear fine-tuning assembly 16 is used to adjust the distance between the patterned plate 22 and the prism 5.

[0032] An embodiment of the second operating platform 2: The second operating platform 2 includes a second base and a plurality of second fine-tuning lifting mechanisms, which are arranged between the second base and the screw slider module 15. In this structural design, the second fine-tuning lifting mechanism makes the screw slider module 15 parallel to the horizontal plane.

[0033] In another embodiment of the present invention, a laser mounting plate 19 is slidably mounted on the first bracket 12. The laser rangefinder 3 is mounted on the laser mounting plate 19 via a second fine-tuning mechanism 20. The laser mounting plate 19 slides up and down along the first bracket 12 to adjust the height of the laser rangefinder 3. The second fine-tuning mechanism 20 is used to adjust the horizontal and elevation angles of the laser rangefinder 3 to ensure that the laser light 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 to ensure that the laser light 21 emitted by the laser rangefinder 3 is in the same plane as the laser light 21 emitted by the contact line geometry measuring instrument 4.

[0034] An embodiment of the movement of the first bracket 12 on the first operating table 1 includes: a first slider 17 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 screw slider module 15 .

[0035] Specifically, the contact network geometric parameter measuring instrument 4 includes: a ruler, a laser head and a display screen.

[0036] 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.

[0037] One embodiment of the first operating platform 1 includes a base plate, a first base, and a plurality of first fine-adjustment lifting mechanisms disposed between the first base and the base plate. The base plate is provided with a first level, and the track gauge block and first linear guide rail 18 are also disposed on the base plate. The utility model adjusts the first fine-adjustment lifting mechanisms to maintain a horizontal position by observing the first level.

[0038] 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.

[0039] Specifically, the length of the prism 5 is greater than the distance between the two laser rangefinders 3 .

[0040] Specifically, different positioning holes are provided 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.

[0041] The utility model also provides an operating procedure of an automatic calibration device for a contact network geometric parameter measuring instrument:

[0042] Device debugging before calibration

[0043] With reference to the second level 10, the left lifting fine-adjustment assembly 8 and the right lifting fine-adjustment assembly 9 are adjusted so that the line pattern plate 22 is parallel to the horizontal plane; the contact network geometry parameter measuring instrument 4 is activated, and the laser 21 emitted by the contact network geometry parameter measuring instrument 4 is irradiated onto the line pattern plate 22 through the prism 5. The line pattern plate 22 is driven to move by the first linear fine-adjustment 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;

[0044] Height value indication verification of contact network geometric parameter measuring instrument 4:

[0045] S1: Start the laser rangefinder 3 and drive the second bracket 6 to slide away from the prism 5. When the pattern plate 22 slides to point W1, the pattern plate 22 stops sliding. At the W1 calibration point, the reading of the laser rangefinder 3 is 5100m, and the contact line height reading of the contact network geometry parameter measuring instrument 4 is x1mm. The indication error of the contact line height value at the W1 calibration point is (x1-5100)mm.

[0046] S2: The second bracket 6 is driven to slide away from the prism 5. When the pattern plate 22 slides to point W2, the pattern plate 22 stops sliding. At the W2 calibration point, the reading of the laser rangefinder 3 is 5500 m, and the contact line height reading of the contact line geometry parameter measuring instrument 4 is x2 mm. The indication error of the contact line height value at the W2 calibration point is (x2-5500) mm.

[0047] S3: Continue to drive the second bracket 6 to slide away from the prism 5. When the pattern plate 22 slides to point W3, 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 geometry parameter measuring instrument 4 is x3mm. The indication error of the contact line height value at the W3 calibration point is (x3-5900)mm.

[0048] S4: Continue to drive the second bracket 6 to slide in the direction away from the prism 5. When the pattern plate 22 slides to point W4, the pattern plate 22 stops sliding. At the W4 calibration point, the reading of the laser rangefinder 3 is 6500m, and the contact line height reading of the contact network geometry parameter measuring instrument 4 is x4mm. The indication error of the contact line height value at the W4 calibration point is (x4-6500)mm. The contact line height indication calibration of the measuring instrument is completed.

[0049] Pull-out value indication verification of contact network geometric parameter measuring instrument 4:

[0050] 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 will illuminate the 150mm position of the scale plate 11 on the left. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 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;

[0051] 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 will illuminate the 300mm position of the scale plate 11 on the left. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 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;

[0052] 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 will illuminate the 450mm position of the scale plate 11 on the left. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 will pull out a value reading of y. 13, the pull-out value indication error at the θ3 test point is (y 13 -450)mm;

[0053] 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 will illuminate the 600mm position of the scale plate 11 on the left. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 will pull out a value reading of y 14 , the pull-out value indication error at the θ4 test point is (y 14 -600) mm; complete the positive stroke verification of the contact network geometric parameter measuring instrument 4;

[0054] 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. Slowly rotate the laser head of the contact network geometry parameter measuring instrument 4 to the left. When it rotates to θ5, the laser 21 emitted by the contact network geometry parameter measuring instrument 4 shines on the 150mm position of the scale plate 11 on the right. Stop rotating the laser head. 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 test point is (y 21 -150)mm;

[0055] 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 will illuminate the 300mm position of the scale plate 11 on the right. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 will pull out a value reading of y 22 , the pull-out value indication error at the θ6 test point is (y 22 -300)mm;

[0056] 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 will illuminate the 450mm position of the scale plate 11 on the right. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 will pull out a value reading of y. 33 , the pull-out value indication error at the θ7 test point is (y 33 -450)mm;

[0057] 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 will illuminate the 600mm position of the scale plate 11 on the right. Stop rotating the laser head and the contact network geometry parameter measuring instrument 4 will pull out a value reading of y 44 , the error of the pull-out value at the θ8 test 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.

[0058] As another embodiment of the present invention: During the height 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 illuminate both sides of the zero-point scale line on the linear plate 22. The laser rangefinders 3 are moved up and down so that the distances between the two laser rangefinders 3 and 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 5100 mm; in step S2, at the W2 calibration point, the average value of the readings of the two laser rangefinders 3 is 5500 mm; in step S3, at the W3 calibration point, the average value of the readings of the two laser rangefinders 3 is 5900 mm; and in step S4, at the W4 calibration point, the average value of the readings of the two laser rangefinders 3 is 6500 mm.

[0059] In the step of driving the second bracket 6 to slide in the direction away from the prism 5, the servo motor is started, and the screw slider module 15 drives the line plate 22 to slide in the direction away from the prism 5, thereby realizing automatic calibration of the height value indication of the contact network geometric parameter measuring instrument 4.

[0060] During the pullout value indication verification of the contact line geometry measuring instrument 4, the line plate 22 stopped at point W1, i.e., the average value of the readings of the two laser rangefinders 3 was 5100 mm. The gauge blocks were moved so that the distance between them was 1435 mm.

[0061] In the present invention, the device debugging steps before calibration are simple. The height indication of the contact network geometry parameter measuring instrument 4 is then calibrated using the indication of the laser rangefinder 3. During this process, a servo motor is used to automatically collect data, achieving automation of the calibration device. Only one calibrator is required to complete the calibration of the measuring instrument, thereby improving work efficiency. 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, thereby calibrating the pull-out value indication of the contact network geometry parameter measuring instrument 4 using the scale value on the scale plate 11. The design of two scale plates 11 facilitates calibration of the positive and negative pull-out value indications of the contact network geometry parameter measuring instrument 4. The overall structure is simple, and calibration of the height indication and pull-out value indication of the contact network geometry parameter measuring instrument 4 can be automatically completed, with good calibration results and high efficiency. The calibration device is easy to debug. After completing the calibration of the height indication of the contact network geometry parameter measuring instrument 4, the calibration of the pull-out value indication does not require re-debugging of the calibration device, effectively improving calibration efficiency.

[0062] Secondly, the calibration device of the present utility model traces the contact line height value of the measuring instrument to two laser rangefinders 3, reducing installation errors and Abbe errors, further ensuring the traceability accuracy of the contact line height value. Thirdly, the calibration device of the present utility model primarily calibrates the contact line height and pullout value of the contact network geometry parameter measuring instrument 4, tracing the contact line height value to the laser rangefinder 3 and the pullout value to the line pattern plate 22. This fundamentally improves the accuracy and stability of the traceability of the key parameters of the contact network geometry parameter measuring instrument 4. Fourthly, the calibration device of the present utility model realizes the continuous, automated, and real-time calibration of the contact line height and pullout values. Based on the requirements of the calibration regulations, the device of the present utility model can select different calibration points for the contact line height and pullout values according to the actual needs of the customer. This further enables the calibration of measuring instruments to be closer to their actual working conditions. Fifthly, the calibration device of the present utility model adopts a modular design, which improves the convenience of processing and assembly of the calibration device, and enhances its economic efficiency, scalability, and applicability.

[0063] 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 various embodiments of the present invention.

Claims

1. An automatic calibration device for a contact network geometric parameter measuring instrument, characterized in that: The utility model 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 component and a line pattern plate, a left lifting fine-tuning component and a right lifting fine-tuning component are provided 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, the line pattern plate is provided with a second level, the line pattern plate is provided with a plurality of scale lines; the scale lines on the line pattern plate are divided into two scale plates, 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, 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 onto the line pattern plate.

2. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 1, 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, characterized in that: A first bracket is horizontally slidably mounted on the first operating table. The laser rangefinder moves up and down along the first bracket. 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, characterized in that: The prism is mounted on the first bracket via a first fine-tuning mechanism.

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

6. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 5, characterized in that: 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.

7. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 6, 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 line plate is driven to move by the first linear fine-tuning component is perpendicular to the direction in which the line 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 3, 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. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 8, characterized in that: A laser instrument mounting plate is slidably provided on the first bracket, and the laser rangefinder is mounted on the laser instrument mounting plate via a second fine-tuning mechanism.

10. The automatic calibration device for the contact network geometric parameter measuring instrument according to claim 9, characterized in that: The scale body of the contact network geometric parameter measuring instrument is installed on the first operating platform through two gauge standard blocks.

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