Calibration method and system for contact network geometric parameter measuring instrument

Abstract

The present invention provides a calibration method and system for a contact network geometric parameter measuring instrument, which relates to the field of contact network measuring equipment metrology in the railway industry. An experimental device composed of a simulated rail assembly and a simulated contact line assembly can simulate standard contact network conductance and pull-out values. The contact network geometric parameter measuring instrument is fixedly clamped on a stand, and the contact network conductance and pull-out value metrology characteristics of the contact network geometric parameter measuring instrument can be calibrated. A vertical measuring surface is formed by a connecting line of the tops of the rails in a railway line cross section and a vertical line perpendicular to their centers. Based on the invariance of its plane rotation geometric relationship, the present invention realizes the rotation transformation of components that need to be arranged in the air on a vertical plane to be placed along a near-ground horizontal plane through an experimental device composed of a simulated rail assembly and a simulated contact line assembly, thereby making it more universal to the experimental site, and the calibration operation and equipment maintenance of the contact network geometric parameter measuring instrument are more convenient, accurate, safe and reliable.

Description

Technical Field

[0001] The invention relates to the field of contact network measuring equipment metrology in the railway industry, and in particular to a calibration method and system for a contact network geometric parameter measuring instrument. Background Art

[0002] The overhead line is a high-voltage transmission line network that provides power for electric locomotives and EMUs through pantographs. It consists of overhead line contact wires, suspension support devices, positioning devices, pillars and foundations. To ensure safe and reliable power supply and smooth current collection, the pantograph-net contact is tight and wears evenly, and the wires are laid in a zigzag shape above the electrified railway line. Figure 1 This is a schematic diagram of the contact network geometric parameter measuring instrument measuring the contact network geometric parameters, such as Figure 1 As shown, the overhead contact network geometric parameter measuring instrument is used to measure the overhead contact network wire suspension height (conductor height Hs) and pull-out value Ss and other geometric parameters to monitor and control the installation position and usage status changes of each component of the overhead contact network relative to the line. The calibration of the overhead contact network geometric parameter measuring instrument is crucial to the accuracy of the overhead contact network geometric parameter measurement. In the existing technology, the overhead contact network geometric parameter measuring instrument is calibrated by a calibration bench. The calibration bench of the overhead contact network geometric parameter measuring instrument is used to simulate the usage status of the measuring instrument on the track. The calibration bench consists of a calibration bench simulating the rail, a conductor rack and a support. It can simulate the geometric parameters such as the track gauge, superelevation and contact line height, and the pull-out value, so as to realize the calibration of the overhead contact network geometric parameter measuring instrument.

[0003] However, the existing calibration bench for contact network geometry parameter measuring instrument has the following defects: 1. Since the recurrence value range of the simulated contact line height is (5100-6500) mm, and the simulated pillar side limit value is (2400-6500) mm, a laboratory with a height and width of about 7 meters is required. It is difficult to obtain a laboratory with such conditions, resulting in limited use of the calibration bench for contact network geometry parameter measuring instrument; 2. The daily maintenance and inspection of the simulated conductors of the existing calibration bench require high-altitude operations, which poses a risk of falling, and is troublesome for safety protection, and is inconvenient to adjust after being fixed at high altitude; 3. The reliability of the traceability of the calibration bench recurrence value is due to the large layout space, the large influence of air disturbance, and the difficulty in monitoring and controlling the temperature gradient. In addition, it relies on calibration by means of steel tape measure, plumb bob and flat ruler, and the operation links are complicated and inefficient, and the influence of human factors is large, resulting in poor repeatability and stability of the actual values ​​of the calibration of the height and pull-out values.

[0004] Therefore, it is necessary to provide a method and system for calibrating a contact network geometry parameter measuring instrument, so as to improve the convenience of calibrating the contact network geometry parameter measuring instrument, reduce the operational difficulty of calibrating the contact network geometry parameter measuring instrument, and improve the accuracy of calibrating the contact network geometry parameter measuring instrument. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] The technical problem to be solved by the present invention is to solve the problems that the existing contact network parameter measuring instrument verification and calibration technology has great limitations on the experimental site, the maintenance and inspection operation has low safety and is not convenient for adjustment, the traceability of the verification bench reproduction value is not reliable, and the actual situation on site is not simulated.

[0007] (II) Technical solution

[0008] Terms and Definitions:

[0009] Contact line height: the vertical distance from the contact line to the top surface of the track rail;

[0010] Pull-out value: the offset of the contact line from the pantograph centerline at the positioning point;

[0011] Pillar side limit: the horizontal distance between the inner edge of the pillar and the center line of the adjacent railway track top;

[0012] The plane rectangular coordinate system is composed of the rail top (line, X-axis) in the cross section perpendicular to the longitudinal center of the line and the vertical line (Y-axis) of the track center. The orthogonal spatial coordinate system with the longitudinal direction of the line as the Z-axis is formed. The geometric parameters such as the conductor suspension height (conductor height), pull-out value and pillar measurement limit value are defined based on this as the positioning reference.

[0013] Principle of the invention:

[0014] Based on the constancy of the measurement definition, the rotation invariance of the spatial coordinate system and the functional characteristics of the measuring equipment, the plane rectangular coordinate system composed of the rail top (line) (X axis) in the cross section perpendicular to the longitudinal center of the line and the vertical line (Y axis) of the track center is rotated 90 degrees around the X axis to the horizontal plane (the plane coordinate system composed of the longitudinal Z axis and X axis of the line). After the rotation, the mutual geometric relationship between the simulated rail, simulated conductor and the overhead contact network geometry parameter measuring instrument remains unchanged according to the definition, and the overhead contact network geometry parameter measuring instrument is essentially a distance measuring (angle measuring) instrument with special positioning definition due to its physical principle, which also determines that its function should also be usable in rotation (longitudinal tilt).

[0015] The present invention provides a contact network geometry parameter measuring instrument calibration system, comprising a simulated rail component, a simulated contact line component and a contact network geometry parameter measuring instrument fixing component, wherein the simulated rail component is used to simulate the rail, the simulated contact line component is used to simulate the contact line, the contact network geometry parameter measuring instrument fixing component is used to fix the contact network geometry parameter measuring instrument, the simulated rail component is located on one side of the simulated contact line component, the contact network geometry parameter measuring instrument fixing component is arranged on the simulated rail component, the contact network geometry parameter measuring instrument fixing component is arranged on one side of the simulated rail component, and the laser emitted by the contact network geometry parameter measuring instrument is directed toward the simulated contact line component. The contact network geometry parameter measuring instrument is fixedly clamped on the simulated rail assembly, the simulated contact line assembly is placed on one side of the simulated rail assembly, and the geometric parameters of the simulated contact line on it are measured by the contact network geometry parameter measuring instrument. The difference from the existing calibration means is that the contact network geometry parameter measuring instrument is installed horizontally, the simulated contact line assembly is set in the horizontal direction on one side of the measuring head of the contact network geometry parameter measuring instrument, and the contact network geometry parameter measuring instrument emits a horizontal measurement laser to the simulated contact line assembly to measure the simulated contact network geometry parameters, and then calibrates the contact network geometry parameter measuring instrument. The environmental requirements of the calibration process of the contact network geometry parameter measuring instrument are reduced, and the simulated contact line assembly is more convenient to move and adjust, the calibration work of the contact network geometry parameter measuring instrument is simpler and more efficient, and the calibration effect is more accurate and reliable.

[0016] Furthermore, the simulated rail assembly includes a fixed beam, both ends of the bottom of the fixed beam are provided with a first adjustable base, one end of the top of the fixed beam is provided with a left simulated rail, the other end of the top of the fixed beam is provided with a right simulated rail, the spacing between the left simulated rail and the right simulated rail is adjustable, a zero position reference beam is provided between the left simulated rail and the right simulated rail, the zero position reference beam is slidably provided on the top of the fixed beam, the contact network geometry parameter measuring instrument fixing assembly is used to fix the contact network geometry parameter measuring instrument to one side of the left simulated rail, the right simulated rail and the zero position reference beam; the first adjustable base includes an adjustable screw, the length of the adjustable screw is adjustable; the fixed beam is provided with a first longitudinal level bubble and a first transverse level bubble.

[0017] Furthermore, the contact network geometry parameter measuring instrument fixing assembly includes a left-end locking device, a right-end locking device and a fixed corrector, and the left-end locking device, the right-end locking device and the fixed corrector are used to fix the contact network geometry parameter measuring instrument on one side of the left-end simulated rail, the right-end simulated rail and the zero-position reference beam.

[0018] Furthermore, the structure of the left-end locker is consistent with that of the right-end locker, and the left-end locker includes a left-end locking plate and a left-end locking column, the left-end locking plate is arranged on the fixed beam, the left-end locking column is rotatably arranged on the left-end locking plate, the left-end locking column is threadedly connected to the left-end locking plate, and the left-end locking column faces the left-end simulated rail.

[0019] Further, the fixed corrector includes a first correction plate, a first correction column, a second correction plate and a second correction column, the first correction plate and the second correction plate are arranged on the fixed beam, the first correction column is rotatably set on the first correction plate, the first correction column is threadedly connected to the first correction plate, the second correction column is rotatably set on the second correction plate, the second correction column is threadedly connected to the second correction plate, and the first correction column and the second correction column are both facing the zero position reference beam.

[0020] Furthermore, the simulated contact wire assembly includes a simulated contact wire base, a simulated contact wire arranged on the simulated contact wire base, and a simulated column arranged on the simulated contact wire base.

[0021] The present invention provides a contact network geometry parameter measuring instrument calibration method, which is applied to the above-mentioned contact network geometry parameter measuring instrument calibration system, comprising: S1, installing the simulated rail assembly and the simulated contact wire assembly; S2, debugging the simulated rail assembly and the simulated contact wire assembly; S3, installing the contact network geometry parameter measuring instrument on the simulated rail assembly through the contact network geometry parameter measuring instrument fixing assembly; S4, controlling the contact network geometry parameter measuring instrument to perform contact wire height measurement to obtain a contact wire height error; S5, controlling the contact network geometry parameter measuring instrument to perform pull-out value measurement to obtain a pull-out value error; S6, judging whether to calibrate the contact network geometry parameter measuring instrument according to the contact wire height error and the pull-out value error, and if so, executing S7, and if not, completing the calibration; S7, calibrating the contact network geometry parameter measuring instrument according to the contact wire height error and the pull-out value error, and executing S4 after the calibration is completed. The environmental requirements for the calibration process of the contact network geometry parameter measuring instrument are reduced, and the simulated contact line components are more convenient to move and adjust, making the calibration of the contact network geometry parameter measuring instrument simpler and more efficient, and the calibration effect more accurate and reliable.

[0022] Furthermore, the simulated rail assembly and the simulated contact line assembly are debugged, including: S31, using a coincidence level and an I-shaped level ruler to level the simulated rail assembly in the transverse and longitudinal directions; S32, using a laser tracker to respectively measure the left-end simulated rail and the right-end simulated rail of the simulated rail assembly to obtain a common plane of the simulated rails, using a laser tracker to measure the simulated contact line to obtain a busbar of the simulated contact line, calculating the parallelism of the common plane of the simulated rails and the busbar of the simulated contact line, and according to the parallelism, adjusting the busbar of the simulated contact line to be parallel to the common plane of the simulated rails.

[0023] Furthermore, the contact network geometry parameter measuring instrument is controlled to measure the contact line height to obtain the contact line height error, including: S41, determining a plurality of test track gauges; S42, for each of the test track gauges, adjusting the distance between the left simulated rail and the right simulated rail of the simulated rail assembly according to the test track gauge, using the measuring laser tracker to measure the simulated contact line, the left simulated rail and the right simulated rail of the simulated rail assembly, calculating the distance from the busbar of the simulated contact line to the common plane of the simulated rail as the height reproduction value of the simulated contact line, determining a plurality of first measurement positions according to the height reproduction value, controlling the contact network geometry parameter measuring instrument to measure the contact line height at each of the first measurement positions to obtain the contact line height measurement value; S43, calculating the contact line height error according to the contact line height measurement value and the actual contact line height value of each of the first measurement positions corresponding to each of the test track gauges.

[0024] Further, the contact network geometry parameter measuring instrument is controlled to perform pull-out value measurement to obtain a pull-out value error, including: S51, determining a plurality of test track gauges; S52, for each of the test track gauges, adjusting the distance between the left-end simulated rail and the right-end simulated rail of the simulated rail assembly according to the test track gauge, using the laser tracker to measure the inner measuring surface of the left-end simulated rail and the inner measuring surface of the right-end simulated rail of the simulated rail assembly, calculating the center plane, calculating the distance from the busbar of the simulated contact line to the center plane as a pull-out reproduction value, determining a plurality of second measurement positions according to the pull-out reproduction value, controlling the contact network geometry parameter measuring instrument to perform pull-out value measurement at each of the second measurement positions to obtain a pull-out value measurement value; S53, calculating the pull-out value error according to the pull-out value measurement value and the pull-out value actual value of each of the first measurement positions corresponding to each of the test track gauges. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0026] Figure 1 It is a schematic diagram of the contact network geometric parameter measuring instrument measuring the contact network geometric parameters;

[0027] Figure 2 It is a structural schematic diagram of a contact network geometric parameter measuring instrument calibration system according to some embodiments of this specification;

[0028] Figure 3 It is a schematic diagram of the structure after installing the contact network geometric parameter measuring instrument according to some embodiments of this specification;

[0029] Figure 4 It is a schematic flow chart of a method for calibrating a contact network geometric parameter measuring instrument according to some embodiments of this specification;

[0030] Figure 5 It is a schematic diagram of a process of debugging a simulated rail assembly and a simulated contact wire assembly according to some embodiments of this specification;

[0031] Figure 6 It is a schematic diagram of a process of controlling a contact network geometric parameter measuring instrument to perform contact line height measurement according to some embodiments of this specification;

[0032] Figure 7 It is a schematic diagram of a process of controlling a contact network geometric parameter measuring instrument to perform pull-out value measurement according to some embodiments of this specification;

[0033] Figure 8 It is a schematic diagram of the inventive principle shown in some embodiments of this specification.

[0034] In the figure, 1-simulated contact line assembly, 11-simulated contact line base, 12-simulated contact line, 13-simulated column, 2-simulated rail assembly, 21-fixed beam, 22-left end simulated rail, 23-right end simulated rail, 24-zero position reference beam, 25-first longitudinal level bubble, 26-first transverse level bubble, 27-first adjustable foot, 3-contact network geometry parameter measuring instrument fixed assembly, 311-left end locking plate, 312-left end locking column, 331-first correction plate, 332-first correction column, 333-second correction plate, 334-second correction column, 4-contact network geometry parameter measuring instrument. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions of the embodiments of this specification, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of this specification. For ordinary technicians in this field, this specification can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0036] Figure 2 is a schematic diagram of the structure of a calibration system for a contact network geometric parameter measuring instrument 4 according to some embodiments of this specification, Figure 3 is a schematic diagram of the structure after the contact network geometric parameter measuring instrument 4 is installed according to some embodiments of this specification, such as Figure 2 and Figure 3 As shown, the contact network geometry parameter measuring instrument 4 calibration system may include a simulated rail component 2, a simulated contact wire component 1 and a contact network geometry parameter measuring instrument fixing component 3, wherein the simulated rail component 2 is used to simulate the rail, the simulated contact wire component 1 is used to simulate the contact wire, the contact network geometry parameter measuring instrument fixing component 3 is used to fix the contact network geometry parameter measuring instrument 4, the simulated rail component 2 is located on one side of the simulated contact wire component 1, the contact network geometry parameter measuring instrument fixing component 3 is arranged on the simulated rail component 2, the contact network geometry parameter measuring instrument fixing component 3 is arranged on one side of the simulated rail component 2, and the laser emitted by the contact network geometry parameter measuring instrument 4 is directed toward the simulated contact wire component 1.

[0037] Specifically, when calibrating the contact network geometry parameter measuring instrument 4, the contact network geometry parameter measuring instrument 4 is fixedly clamped on the simulated rail assembly 2, the simulated contact wire assembly 1 is placed on one side of the simulated rail assembly 2 and its geometric parameters are measured by the contact network geometry parameter measuring instrument 4. The contact network geometry parameter measuring instrument 4 is installed horizontally, and the simulated contact wire assembly 1 is set in the horizontal direction on one side of the measuring head of the contact network geometry parameter measuring instrument 4. The contact network geometry parameter measuring instrument 4 emits a horizontal measurement laser to the simulated contact wire assembly 1 to measure the simulated contact network geometry parameters, thereby calibrating the contact network geometry parameter measuring instrument 4. Figure 8 It is a schematic diagram of the inventive principle shown in some embodiments of this specification, such as Figure 8As shown, based on the constancy of the measurement definition, the rotation invariance of the spatial coordinate system and the functional characteristics of the measuring equipment, the plane rectangular coordinate system composed of the rail top (X axis) in the cross section perpendicular to the longitudinal center of the line and the vertical line (Y axis) of the track center is rotated 90 degrees around the X axis to the horizontal plane, that is, the plane coordinate system composed of the longitudinal Z axis and the X axis of the line. After the rotation, the mutual geometric relationship between the simulated rail, simulated conductor and measuring instrument formed by the calibration system of the contact network geometric parameter measuring instrument 4 remains unchanged according to the definition, and the measuring instrument is essentially a distance measuring (angle measuring) instrument with special positioning definition due to its physical principle, which also determines that its function should be usable in rotation.

[0038] like Figure 2 As shown, the simulated rail assembly 2 includes a fixed beam 21, both ends of the bottom of the fixed beam 21 are provided with a first adjustable footing 27, one end of the top of the fixed beam 21 is provided with a left simulated rail 22, the other end of the top of the fixed beam 21 is provided with a right simulated rail 23, the spacing between the left simulated rail 22 and the right simulated rail 23 is adjustable, a zero reference beam 24 is provided between the left simulated rail 22 and the right simulated rail 23, the zero reference beam 24 is slidably provided on the top of the fixed beam 21, and the contact network geometry parameter measuring instrument fixing assembly 3 is used to fix the contact network geometry parameter measuring instrument 4 on one side of the left simulated rail 22, the right simulated rail 23 and the zero reference beam 24. The first adjustable footing 27 includes an adjustable screw, and the length of the adjustable screw is adjustable. The fixed beam 21 is provided with a first longitudinal level bubble 25 and a first transverse level bubble 26.

[0039] Specifically, the simulated rail top surface and track gauge values ​​composed of the left simulated rail 22 and the right simulated rail 23 are reproduced. The zero reference beam 24 is used to compensate the weight of the contact network geometric parameter measuring instrument 4 after placement, and is also used to reproduce the simulated contact line conductance value and pull-out value. The fixed beam 21 is adjusted by the first adjustable foot 27 to ensure that the simulated rail top surface is perpendicular to the ground.

[0040] like Figure 2As shown, the contact network geometry parameter measuring instrument fixing assembly 3 includes a left end locking device, a right end locking device and a fixed corrector, and the left end locking device, the right end locking device and the fixed corrector are used to fix the contact network geometry parameter measuring instrument 4 on one side of the left end simulated rail 22, the right end simulated rail 23 and the zero reference beam 24. The left end locking device has the same structure as the right end locking device, and the left end locking device includes a left end locking plate 311 and a left end locking column 312, the left end locking plate 311 is arranged on the fixed beam 21, the left end locking column 312 is rotatably arranged on the left end locking plate 311, the left end locking column 312 is threadedly connected to the left end locking plate 311, and the left end locking column 312 faces the left end simulated rail 22. The fixed corrector includes a first correction plate 331, a first correction column 332, a second correction plate 333 and a second correction column 334. The first correction plate 331 and the second correction plate 333 are arranged on the fixed beam 21. The first correction column 332 is rotatably arranged on the first correction plate 331. The first correction column 332 is threadedly connected to the first correction plate 331. The second correction column 334 is rotatably arranged on the second correction plate 333. The second correction column 334 is threadedly connected to the second correction plate 333. The first correction column 332 and the second correction column 334 are both facing the zero position reference beam 24.

[0041] Specifically, the contact network geometry parameter measuring instrument 4 is fixed on the calibration platform by the left end locking device and the right end locking device, and the gravity compensation is restored to the contact network geometry parameter measuring instrument 4 by the fixed corrector and the zero position reference beam 24. The dial indicator is clamped on the fixed corrector, and the corresponding compression value is read on the dial indicator before the aiming part of the contact network geometry parameter measuring instrument 4 is installed. After the aiming part of the contact network geometry parameter measuring instrument 4 is installed, the fixed corrector is adjusted, and the compression value before installation is restored by the dial indicator. It is also used to simulate the reproduction of the contact wire conductance value and pull-out value of the simulated rail assembly 2. The side surface of the zero position reference beam 24 is coplanar with the left end simulated rail 22 and the right end simulated rail 23. The side surface of the zero position reference beam 24 is used as the simulated rail plane, which can realize the direct measurement of the distance from the "point" to the "surface" on the same section, so as to achieve the purpose of directly reproducing the contact network height and pull-out value on the simulated rail assembly 2.

[0042] like Figure 2 As shown, the simulated contact wire assembly 1 includes a simulated contact wire base 11 , a simulated contact wire 12 arranged on the simulated contact wire base 11 , and a simulated column 13 arranged on the simulated contact wire base 11 .

[0043] Specifically, the simulated contact line 12 is used as a simulated actual contact line to simulate the reproducing values ​​of the measured height and pull-out values ​​during actual operation. The parallelism between the plane contact line and the common plane of the two simulated rails is first adjusted, that is, the left end simulated rail 22 and the right end simulated rail 23 of the simulated rail assembly 2 are measured using a laser tracker to obtain the common plane of the simulated rails, and the simulated contact line 12 is measured using a laser tracker to obtain the busbar of the simulated contact line 12. The parallelism between the common plane of the simulated rails and the busbar of the simulated contact line 12 is calculated. According to the parallelism, the busbar of the simulated contact line 12 is adjusted to be parallel to the common plane of the simulated rails, and then the verticality of the simulated contact line base to the simulated column and the simulated contact line is adjusted to ensure that the simulated contact line assembly is parallel to the calibration platform.

[0044] Figure 2 The contact network geometry parameter measuring instrument calibration system shown has at least the following advantages:

[0045] 1. It does not require high working conditions on site, is easy to control the temperature and humidity in the laboratory, and has low investment and operation and maintenance costs;

[0046] Second, it is convenient to adjust and install the simulated contact line components at a height close to the ground, which saves the supporting tools and protective facilities for high-altitude operations and avoids corresponding safety hazards.

[0047] 3. It is easy to adopt advanced means to achieve more accurate and rapid calibration to reproduce the standard guide height and pull-out values, ensuring that the traceability of measurement values ​​is accurate, efficient and reliable.

[0048] Fourth, based on the constancy of the measurement definition, the rotation invariance of the spatial coordinate system and the functional characteristics of the measuring equipment, the core "invariance" and the main contradiction "strain" are grasped to break the deadlock, and the original vertical measurement of the contact line height and pull-out value is converted to horizontal measurement. The new calibration test bench that can simulate the track and place the contact network geometry parameter measuring instrument 4 lying forward to measure the contact line with the calibrated standard value in the horizontal direction is used to fix and control the vertical deformation of the contact network geometry parameter measuring instrument 4 after rotation, and adopt the fixed corrector and the zero reference beam 24 to compensate for the deformation of the sighting part of the contact network geometry parameter measuring instrument 4 in the gravity direction before rotation, and restore the original configuration of the contact network geometry parameter measuring instrument 4; in addition, the left end locker and the right end locker are used to apply pressure at both ends to restore the ruler body gravity. The simulated rail assembly 2, the simulated contact line assembly 1 and the contact network geometry parameter measuring instrument fixed assembly 3 that are easy to move and adjust on the ground are used in conjunction to achieve efficient and reliable measurement of the actual value of the height and pull-out value.

[0049] Figure 4 is a flow chart of a method for calibrating a contact network geometric parameter measuring instrument according to some embodiments of this specification, such as Figure 4As shown, the contact network geometric parameter measuring instrument calibration method, applied to the above-mentioned contact network geometric parameter measuring instrument calibration system, may include the following steps:

[0050] S1, installing the simulated rail assembly 2 and the simulated contact wire assembly 1;

[0051] S2, debugging the simulated rail assembly 2 and the simulated contact wire assembly 1;

[0052] S3, installing the contact network geometry parameter measuring instrument 4 on the simulated rail assembly 2 through the contact network geometry parameter measuring instrument fixing assembly 3;

[0053] S4, controlling the contact network geometric parameter measuring instrument 4 to measure the contact line height, and obtaining the contact line height error;

[0054] S5, controlling the contact network geometric parameter measuring instrument 4 to measure the pull-out value, and obtaining the pull-out value error;

[0055] S6, judging whether to calibrate the contact network geometric parameter measuring instrument 4 according to the contact line height error and the pull-out value error, if so, executing S7, if not, completing the calibration, for example, the contact line height error is greater than the contact line height error threshold and / or the pull-out value error is greater than the pull-out value error threshold;

[0056] S7. Calibrate the contact network geometric parameter measuring instrument 4 according to the contact line height error and the pull-out value error. After the calibration is completed, execute S4.

[0057] For example, a simulated rail assembly 2 and a simulated contact wire assembly 1 can be installed in a laboratory with a length of not less than 7.5 meters, a width of not less than 2 meters, and a floor height of not less than 2.5 meters. After the contact network geometry parameter measuring instrument 4 is installed on the simulated rail assembly 2 through the contact network geometry parameter measuring instrument fixing component 3, the self-weight influence of the contact network geometry parameter measuring instrument 4 when it is placed vertically is restored through the fixing corrector and the dial indicator.

[0058] Figure 5 is a schematic diagram of a process for debugging a simulated rail assembly and a simulated contact wire assembly according to some embodiments of this specification, such as Figure 5 As shown, the simulated rail assembly 2 and the simulated contact wire assembly 1 are debugged, including:

[0059] S31, using a level gauge and a flat ruler to level the simulated rail assembly 2 in the horizontal and vertical directions;

[0060] S32. Use a laser tracker to measure the left-end simulated rail 22 and the right-end simulated rail 23 of the simulated rail assembly 2 respectively to obtain the common plane of the simulated rails. Use a laser tracker to measure the simulated contact line 13 to obtain the busbar of the simulated contact line 13. Calculate the parallelism between the common plane of the simulated rails and the busbar of the simulated contact line 13. According to the parallelism, adjust the busbar of the simulated contact line 13 to be parallel to the common plane of the simulated rails.

[0061] Figure 6 is a schematic diagram of a process of controlling a contact network geometric parameter measuring instrument to measure the contact line height according to some embodiments of this specification, such as Figure 6 As shown, the contact line geometric parameter measuring instrument is controlled to measure the contact line height and obtain the contact line height error, including:

[0062] S41, determining a plurality of test track gauges;

[0063] S42, for each test track gauge, adjusting the distance between the left end simulated rail 22 and the right end simulated rail 23 of the simulated rail assembly 2 according to the test track gauge, using a measuring laser tracker to measure the simulated contact line 13, the left end simulated rail 22 and the right end simulated rail 23 of the simulated rail assembly 2, calculating the distance from the busbar of the simulated contact line 13 to the common plane of the simulated rails as the height reproduction value of the simulated contact line 13, determining a plurality of first measurement positions according to the height reproduction value, controlling the contact network geometric parameter measuring instrument 4 to perform contact line height measurement at each first measurement position, and obtaining the contact line height measurement value;

[0064] S43, calculating the contact line height error according to the contact line height measurement value and the contact line height actual value at each first measurement position corresponding to each test track gauge.

[0065] For example, the distance between the left simulated rail 22 and the right simulated rail 23 is adjusted to 1435mm, and the contact network geometric parameter measuring instrument 4 is measured at 6 measuring points respectively. Each position is measured 3 times and the average value is taken as the measurement result. The difference between the measurement result and the actual value of the height of the simulated contact line 13 corresponding to the calibration test bench is the contact line height indication error. The same method is used to measure at a track gauge of 1470mm and 1410mm. The mean value of the contact line height indication error corresponding to each first measurement position corresponding to each test track gauge is calculated as the contact line height error. According to the height recurrence value, the height recurrence value range (for example, 5100-6500mm) can be determined, and the contact line height measurement is performed at 6 positions evenly distributed within the height recurrence value range.

[0066] Figure 7 is a schematic diagram of a process of controlling a contact network geometric parameter measuring instrument to measure a pull-out value according to some embodiments of this specification, such as Figure 7As shown, the contact network geometric parameter measuring instrument is controlled to measure the pull-out value, and the pull-out value error is obtained, including:

[0067] S51, determining a plurality of test track gauges;

[0068] S52, for each test track gauge, adjusting the distance between the left end simulated rail 22 and the right end simulated rail 23 of the simulated rail assembly 2 according to the test track gauge, using a laser tracker to measure the inner measuring surface of the left end simulated rail 22 and the inner measuring surface of the right end simulated rail 23 of the simulated rail assembly 2, calculating the center plane, calculating the distance from the busbar of the simulated contact line 13 to the center plane as the pull-out reappearance value, determining a plurality of second measurement positions according to the pull-out reappearance value, controlling the contact network geometric parameter measuring instrument 4 to perform the pull-out value measurement at each second measurement position, and obtaining the pull-out value measurement value;

[0069] S53, calculating the pull-out value error according to the pull-out value measured value and the pull-out value actual value at each first measurement position corresponding to each test track gauge.

[0070] For example, the pull-out value parameter of the contact network geometry parameter measuring instrument 4 is measured, and the distance between the left-end simulated rail 22 and the right-end simulated rail 23 is adjusted to 1435 mm. The contact network geometry parameter measuring instrument 4 is measured at 6 measuring points respectively, and each position is measured 3 times to take the average value as the measurement result. The difference between the measurement result and the actual value of the pull-out value is the pull-out value error; the same method is used to measure at a track gauge of 1470 mm and 1410 mm. The mean of the contact line pull-out value error corresponding to each first measurement position corresponding to each test track gauge is calculated as the pull-out value error. According to the pull-out recurrence value, the pull-out recurrence value range (for example, 0 to 600 mm) can be determined, and the pull-out value measurement is performed at 6 positions evenly distributed in the pull-out recurrence value range.

[0071] After completing the calibration work, remove the contact network geometry parameter measuring instrument 4 and put it back in place.

[0072] Finally, it should be understood that the embodiments described in this specification are only used to illustrate the principles of the embodiments of this specification. Other variations may also fall within the scope of this specification. Therefore, as an example and not a limitation, alternative configurations of the embodiments of this specification may be considered consistent with the teachings of this specification. Accordingly, the embodiments of this specification are not limited to the embodiments explicitly introduced and described in this specification.

Claims

1. The contact network geometric parameter measuring instrument calibration system is characterized by: It includes a simulated rail component, a simulated contact line component and a contact network geometry parameter measuring instrument fixing component, wherein the simulated rail component is used to simulate the rail, the simulated contact line component is used to simulate the contact line, the contact network geometry parameter measuring instrument fixing component is used to fix the contact network geometry parameter measuring instrument, the simulated rail component is located on one side of the simulated contact line component, the contact network geometry parameter measuring instrument fixing component is arranged on the simulated rail component, the contact network geometry parameter measuring instrument fixing component is arranged on one side of the simulated rail component, and the laser emitted by the contact network geometry parameter measuring instrument is directed toward the simulated contact line component.

2. The contact network geometric parameter measuring instrument calibration system according to claim 1, characterized in that: The simulated rail assembly comprises a fixed beam, both ends of the bottom of the fixed beam are provided with a first adjustable footing, one end of the top of the fixed beam is provided with a left simulated rail, the other end of the top of the fixed beam is provided with a right simulated rail, the spacing between the left simulated rail and the right simulated rail is adjustable, a zero position reference beam is provided between the left simulated rail and the right simulated rail, the zero position reference beam is slidably provided on the top of the fixed beam, and the contact network geometry parameter measuring instrument fixing assembly is used to fix the contact network geometry parameter measuring instrument on one side of the left simulated rail, the right simulated rail and the zero position reference beam; The first adjustable foot comprises an adjustable screw, the length of which is adjustable; A first longitudinal vial and a first transverse vial are provided on the fixed beam.

3. The contact network geometric parameter measuring instrument calibration system according to claim 1 or 2, characterized in that: The contact network geometry parameter measuring instrument fixing assembly includes a left-end locking device, a right-end locking device and a fixing corrector, and the left-end locking device, the right-end locking device and the fixing corrector are used to fix the contact network geometry parameter measuring instrument on one side of the left-end simulated rail, the right-end simulated rail and the zero-position reference beam.

4. The contact network geometric parameter measuring instrument calibration system according to claim 3 is characterized in that: The structure of the left-end locker is consistent with that of the right-end locker, and the left-end locker includes a left-end locking plate and a left-end locking column. The left-end locking plate is arranged on the fixed beam, and the left-end locking column is rotatably arranged on the left-end locking plate. The left-end locking column is threadedly connected to the left-end locking plate, and the left-end locking column faces the left-end simulated rail.

5. The contact network geometric parameter measuring instrument calibration system according to claim 4, characterized in that: The fixed corrector includes a first correction plate, a first correction column, a second correction plate and a second correction column, the first correction plate and the second correction plate are arranged on the fixed beam, the first correction column is rotatably arranged on the first correction plate, the first correction column is threadedly connected to the first correction plate, the second correction column is rotatably arranged on the second correction plate, the second correction column is threadedly connected to the second correction plate, and the first correction column and the second correction column are both facing the zero position reference beam.

6. The contact network geometric parameter measuring instrument calibration system according to claim 1 or 2, characterized in that: The simulated contact line assembly includes a simulated contact line base, a simulated contact line arranged on the simulated contact line base, and a simulated column arranged on the simulated contact line base.

7. A method for calibrating a contact network geometric parameter measuring instrument, characterized in that: The contact network geometric parameter measuring instrument calibration system as claimed in any one of claims 1 to 6 comprises: S1. Installing the simulated rail assembly and the simulated contact wire assembly; S2. Debugging the simulated rail assembly and the simulated contact wire assembly; S3, installing the contact network geometric parameter measuring instrument on the simulated rail assembly through the contact network geometric parameter measuring instrument fixing assembly; S4, controlling the contact network geometric parameter measuring instrument to measure the contact line height to obtain the contact line height error; S5, controlling the contact network geometric parameter measuring instrument to measure the pull-out value to obtain the pull-out value error; S6, judging whether to calibrate the contact network geometric parameter measuring instrument according to the contact line height error and the pull-out value error, if so, executing S7, if not, completing the calibration; S7, calibrating the contact network geometric parameter measuring instrument according to the contact line height error and the pull-out value error, and executing S4 after the calibration is completed.

8. The contact network geometric parameter measuring instrument calibration method according to claim 7, characterized in that: Debugging the simulated rail assembly and the simulated contact wire assembly includes: S31, using a level gauge and a flat ruler to level the simulated rail assembly in the transverse and longitudinal directions; S32. Use a laser tracker to measure the left and right simulated rails of the simulated rail assembly respectively to obtain a common plane of the simulated rails, use a laser tracker to measure the simulated contact line to obtain a busbar of the simulated contact line, calculate the parallelism between the common plane of the simulated rails and the busbar of the simulated contact line, and according to the parallelism, adjust the busbar of the simulated contact line to be parallel to the common plane of the simulated rails.

9. The contact network geometric parameter measuring instrument calibration method according to claim 7, characterized in that: Controlling the contact network geometric parameter measuring instrument to measure the contact line height to obtain the contact line height error includes: S41, determining a plurality of test track gauges; S42, for each of the test track gauges, adjusting the distance between the left simulated rail and the right simulated rail of the simulated rail assembly according to the test track gauge, using the measuring laser tracker to measure the simulated contact line, the left simulated rail and the right simulated rail of the simulated rail assembly, calculating the distance from the busbar of the simulated contact line to the common plane of the simulated rail as the height reproduction value of the simulated contact line, determining a plurality of first measurement positions according to the height reproduction value, controlling the contact network geometric parameter measuring instrument to perform contact line height measurement at each of the first measurement positions, and obtaining the contact line height measurement value; S43, calculating the contact line height error according to the contact line height measurement value and the contact line height actual value at each of the first measurement positions corresponding to each of the test track gauges.

10. The contact network geometric parameter measuring instrument calibration method according to claim 7, characterized in that: Controlling the contact network geometric parameter measuring instrument to perform pull-out value measurement to obtain a pull-out value error includes: S51, determining a plurality of test track gauges; S52, for each of the test track gauges, adjusting the distance between the left and right simulated rails of the simulated rail assembly according to the test track gauge, using the laser tracker to measure the inner measuring surface of the left and right simulated rails of the simulated rail assembly, calculating the center plane, calculating the distance from the busbar of the simulated contact line to the center plane as a pull-out reappearance value, determining a plurality of second measurement positions according to the pull-out reappearance value, controlling the contact network geometric parameter measuring instrument to perform pull-out value measurement at each of the second measurement positions, and obtaining a pull-out value measurement value; S53: Calculate the pull-out value error according to the pull-out value measurement value and the pull-out value actual value of each first measurement position corresponding to each test track gauge.

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