Railway multifunctional inspection tester verification platform and verification method thereof

Abstract

A multifunctional railway inspection tester verification platform is characterized in that in the aspects of steel rail profile verification and track gauge verification, a steel rail profile sample block is additionally arranged on a verification long beam of an existing track inspection tester verification platform, verification compatibility of a contact type detection scheme and a non-contact type detection scheme is achieved, and comprehensive verification of the steel rail profile and track geometry is achieved; and a rapid mounting structure of the steel rail profile sample block is designed, so that the repeated dismounting and mounting precision when different steel rail sample blocks are replaced is guaranteed, and the magnitude transmission stability is guaranteed. In the aspect of turnout structure size verification, a rim groove width verification support is designed and installed on the inner side of a verification long beam of an existing track inspection tester verification table, and the transverse position relation between complex combined steel rail pieces in a turnout frog area can be simulated.

Description

Technical Field

[0001] The invention relates to the technical field of track detection, and in particular to a railway multifunctional inspection instrument calibration platform and a calibration method thereof. Background Art

[0002] The calibration bench is a special measuring instrument used to trace the value of the detection instrument test data and calibrate the instrument measurement accuracy. At present, railway detection equipment is developing in a multifunctional direction. The multifunctional track status inspection instrument can integrate the detection of parameters such as track geometry, turnout structure dimensions and rail profile. However, the conventional railway track inspection instrument calibration bench is only suitable for the calibration of track geometry (gauge, level (superelevation), track direction, height, gyroscope angle measurement, etc.), and cannot meet the calibration requirements of other structural dimensions and rail profiles at the same time. Therefore, it is necessary to develop a multifunctional calibration bench and establish an efficient metrological technical means that integrates the calibration and calibration of multiple detection items to support the development of railway detection technology and equipment.

[0003] The railway track inspection instrument calibration platform is only suitable for the calibration of track geometric dimensions (gauge, level (superelevation), track direction, height, gyroscope angle measurement, etc.), and cannot meet the calibration requirements of other structural dimensions and rail profiles. As far as the inventor knows, there is still a lack of calibration methods and instruments for multifunctional track inspection instruments in the railway field. Summary of the invention

[0004] The technical problems to be solved are as follows:

[0005] (1) Study the design of a multifunctional calibration platform to achieve integrated calibration and verification of track geometry, turnout structure dimensions, and rail profile.

[0006] (2) Specifically, the verification of turnout structure dimensions should include parameters such as the reduction value, flange groove width, inspection interval, back guard distance, wing rail interval, guardrail interval and height difference of rail parts.

[0007] (3) Specifically, the rail profile verification should be applicable to conventional single-track profiles and combined rail profiles in the turnout area, and to different rail types (43kg / m rails, 50kg / m rails, 60kg / m rails and 75kg / m rails, etc.).

[0008] (4) Specifically, the designed track geometry verification scheme should be suitable for both the contact measurement scheme using displacement sensors and the non-contact detection scheme using optical sensors. The contact detection scheme uses contact displacement sensors to obtain track gauge parameters; the non-contact detection scheme first collects the rail profile and obtains the track gauge parameters based on the profile data.

[0009] (5) Specifically, the calibration of all parameters should be adjustable within a certain measurement range, that is, when calibrating a certain parameter on the calibration platform, it should be able to provide multiple position states.

[0010] The present invention adopts the following technical solutions:

[0011] A railway multifunctional inspection instrument calibration platform comprises an upper bottom plate and a calibration platform long beam, the calibration platform long beam comprises a fixed long beam and a movable long beam, the fixed long beam and the movable long beam are respectively provided with long beam supports, the fixed long beam and the movable long beam are respectively provided with rail profile sample blocks opposite to each other, and track gauge calibration is achieved by measuring the lateral distance between the left and right rail profile blocks; a groove is opened in a direction perpendicular to the length of the calibration platform long beam, and the groove width is matched with the thickness of the rail profile sample block, so that when the profile measurement section of the inspection instrument is perpendicular to the length direction of the calibration platform long beam, it is also perpendicular to the thickness direction of the rail profile sample block, that is, the measured section of the rail profile is parallel to the standard size section.

[0012] Furthermore, by providing various types of rail profile specimens, it is possible to implement the calibration of single rail profiles and combined rail profiles of different rail types.

[0013] Furthermore, it also includes a rail profile sample installation device, which is provided with two high-precision machined installation surfaces, namely the inner installation surface and the top installation surface, and the device is installed on the long beam support of the calibration platform. The side and top installation surfaces are correspondingly arranged below the rail head of the rail profile sample. During installation, the horizontal installation surface below the rail head of the rail profile sample is placed on the top installation surface of the device, and the installation bolts are tightened so that the vertical installation surface below the rail head of the rail profile sample is against the inner installation surface of the device to complete the installation. After the rail sample is installed, the highest point of the rail top of the rail sample is located on the top surface of the long beam, and the 10mm measuring line below the rail head of the working side of the rail is located on the inner side of the long beam.

[0014] Furthermore, it also includes a turnout structure dimension parameter calibration bracket, which is installed on the bottom plate of the calibration platform, and a pad can be installed on the top of the bracket. The pad can slide horizontally on the top surface of the bracket to calibrate the parameters of wheel flange grooves of different widths. The pad can be set with different thicknesses to calibrate the height difference of the rails. A slide can be set on the top of the bracket to implement the lateral movement of the pad, and the adjustability of the wheel flange groove parameters can also be implemented in combination with the lateral adjustment amount of the movable long beam.

[0015] Furthermore, bracket mounting holes are set on the inner side of the double calibration long beams on the bottom plate of the calibration platform, so a pair of turnout structure dimension parameter calibration brackets can be installed at the same time to improve the calibration efficiency. By setting a pair of turnout structure dimension parameter calibration brackets on the inner side of the double calibration long beams, the complex combination of rail parts with up to four rail parts on the turnout detection section is simulated, and the calibration of transverse dimension parameters including the flange groove width of the point rail / basic rail, the flange groove width of the heart rail / wing rail, the flange groove width of the guide rail / guard rail, the inspection interval of the heart rail / guard rail, and the back protection distance of the wing rail / guard rail is realized.

[0016] Furthermore, by installing spacers of different heights on the bracket, the vertical dimensions such as the height difference of the guardrail can be calibrated.

[0017] Furthermore, the combined rail profile sample blocks in the turnout area (point / basic rail, heart / wing rail, guard rail / guide rail, etc.) can be designed and processed, and the combined rail profile sample blocks in the turnout area can be installed on the calibration platform using the rail profile sample installation device, which can be used to realize the calibration of parameters such as rail reduction value, gap value, and wheel flange groove width.

[0018] A verification method integrating rail profile verification and track geometry verification, using the above verification platform, includes the following steps:

[0019] The long beam of the calibration platform is used to simulate the left and right rails. The multifunctional inspection instrument is placed on the long beam, and the equipment is moved along the length of the long beam so that the geometry measurement section of the inspection instrument is within the range of the rail profile sample. For contact gauge measuring equipment, the gauge measurement sensor is contacted with the inner working edge of the rail profile sample to read the gauge measurement value of the equipment; for non-contact gauge measuring equipment, the cross-sectional profiles of the left and right rail samples are collected at the same time, and the solved gauge measurement value is read.

[0020] A comprehensive method for verifying the size parameters of turnout structures, using the above verification platform, comprises:

[0021] 1) Verification method of wheel flange groove width: the long beam of the verification platform is used to simulate the wheel running rail, the multifunctional inspection instrument is placed on the long beam, and the equipment is moved along the length direction of the long beam so that the wheel flange groove measurement section of the inspection instrument is within the range of the rail profile sample block; for the contact measuring equipment, the wheel flange groove width measurement sensor is made to contact the inner working edge of the pad block opposite to the rail profile sample block, and the wheel flange groove width measurement value of the equipment is read; for the non-contact wheel flange groove width measurement equipment, the cross-sectional profiles of the rail sample block and the pad block are collected at the same time, and the lateral distance of mm below the rail head on the working side of the rail and the horizontal position corresponding to the pad block is solved, which is the wheel flange groove width measurement value;

[0022] 2) The rail height difference calibration method is as follows: the long beam of the calibration platform is used to simulate the wheel running rail, the multifunctional inspection instrument is placed on the long beam, and the equipment is moved along the length direction of the long beam so that the wheel flange groove measurement section of the inspection instrument is within the range of the rail profile sample. At the same time, the cross-sectional profiles of the rail sample and the pad are collected, and the vertical distance between the highest point of the rail head and the highest point of the pad is calculated, which is the rail height difference measurement value.

[0023] A method for calibrating turnout structural parameters based on rail profile, using the above-mentioned calibration platform, designing and processing the combined rail profile sample block form of the turnout area (point / basic rail, heart / wing rail, etc., guard rail / guide rail, etc.), and using the rail profile sample block installation device to install the combined rail profile sample block of the turnout area on the calibration platform, which can be used to realize the calibration of parameters such as rail reduction value, gap value, and flange groove width.

[0024] The present invention adopts the above technical solution, which has the following advantages:

[0025] In view of the problem that the existing track inspection instrument calibration platform does not have the multifunctional calibration of parameters such as turnout structure dimensions and rail profile, the present invention proposes an integrated comprehensive solution, which can efficiently and accurately ensure the detection accuracy of the new era railway comprehensive detection instruments, and support the development and application of railway detection technology and equipment.

[0026] In terms of rail profile calibration and track gauge calibration, rail profile samples are innovatively added to the calibration long beam of the existing track inspection instrument calibration platform, achieving calibration compatibility of both contact and non-contact detection schemes, and realizing comprehensive calibration of rail profile and track geometry; a quick installation structure for rail profile samples is designed to ensure the accuracy of repeated disassembly and assembly when replacing different rail samples, and to ensure the stability of measurement value transfer.

[0027] In terms of the calibration of the turnout structure dimensions, a flange groove width calibration bracket is designed and installed on the inner side of the calibration long beam of the existing track inspection instrument calibration platform, which can simulate the lateral position relationship between the complex combination of rail parts in the turnout switch area. Furthermore, the lateral parameter adjustability is achieved with the help of the movable long gauge beam; the height difference parameter adjustability is achieved by adding different spacer block structures to the flange groove width bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the installation device of the present invention;

[0030] Figure 3 It is a schematic diagram of the rail profile sample block form of the present invention;

[0031] Reference numerals:

[0032] 1. Verification platform for railway multifunctional inspection instrument; 2. Verification long beam; 3. Rail profile sample block; 4. Verification bracket for turnout structure dimension parameters; 11. Upper bottom plate; 21. Long beam support; 22. Movable long beam; 23. Fixed long beam; 31. Rail profile sample block installation device; 41. Pad block.

[0033] 3 rail profile sample block; 31 rail profile sample mounting device; 311 inner side mounting support surface; 312 top surface mounting support surface; 313 mounting bolts; 321 single rail profile sample block; 322 combined rail profile sample block. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] The present invention relates to a railway multifunctional inspection instrument calibration platform, comprising an upper bottom plate 11 and a calibration platform long beam 2, wherein the calibration platform long beam 2 comprises a fixed long beam 23 and a movable long beam 22, wherein the fixed long beam 23 and the movable long beam 22 are respectively provided with long beam supports 21, and the fixed long beam 23 and the movable long beam 22 are respectively provided with rail profile blocks 3, and track gauge calibration is achieved by measuring the lateral distance between the left and right rail profile blocks 3; a groove is opened in a direction perpendicular to the length of the calibration platform long beam 2, and the groove width is matched with the thickness of the rail profile block 3, so that when the profile measurement section of the inspection instrument is perpendicular to the length direction of the calibration platform long beam 2, it is also perpendicular to the thickness direction of the rail profile block 3, that is, the measured section of the rail profile is parallel to the standard size section.

[0037] (1) A verification method that combines rail profile verification with track geometry verification.

[0038] The present invention is an upgrade on the basis of the existing track inspection instrument calibration platform. A rail profile sample block 3 is added to the two calibration long beams 2. The gauge calibration is achieved by measuring the lateral distance between the left and right rail profile blocks. It can be adapted to both the contact gauge measurement scheme based on the displacement sensor and the non-contact gauge detection scheme based on the optical sensor. The specific calibration method is as follows: the calibration platform long beam 2 is used to simulate the left and right rails, and the multifunctional inspection instrument is placed on the long beam 2. The equipment is moved along the length direction of the long beam so that the inspection instrument track geometry measurement section is within the range of the rail profile sample block 3. For the contact gauge measurement equipment, the gauge measurement sensor is contacted with the inner working edge of the rail profile sample block 3 to read the equipment gauge measurement value; for the non-contact gauge measurement equipment, the cross-sectional profiles of the left and right rail samples 3 are collected at the same time, and the solved gauge measurement value is read. For non-contact measuring equipment, the design method of the present invention can simultaneously obtain rail profile data and track geometry data, and has the advantage of high calibration efficiency; for contact gauge measuring equipment, when the track geometry measurement section is not coplanar with the rail profile measurement section, it is only necessary to move the equipment along the length direction of the long beam so that the profile measurement section is located in the rail profile sample block 3 area, and the switching collection of rail profile and track geometry is completed, which has the advantages of convenience and efficiency.

[0039] (2) A high-precision and quick installation structure for rail profile samples and a method for detecting turnout structural parameters.

[0040] A groove is cut in a direction perpendicular to the length of the calibration platform long beam 2, and the groove width is coordinated with the thickness of the rail profile sample 3, so that when the profile measurement section of the inspection instrument is perpendicular to the length direction of the calibration platform long beam 2, it is also perpendicular to the thickness direction of the rail profile sample 3, that is, the measured section of the rail profile is parallel to the standard size section, thereby ensuring the dimensional accuracy of the rail profile.

[0041] A rail profile sample installation device 31 is designed. The device is provided with two high-precision machined installation surfaces, an inner side installation surface 311 and a top surface installation surface 312. The device is installed on the long beam support 21 of the calibration platform. The side and top surface installation surfaces are correspondingly set below the rail head of the rail profile sample 3. During installation, the horizontal installation surface below the rail head of the rail profile sample 3 is placed on the top surface installation surface 312 of the device, and the installation bolts 313 are tightened so that the vertical installation surface below the rail head of the rail profile sample 3 is against the inner side installation surface 311 of the device to complete the installation. The installation device and installation method can ensure that the highest point of the rail top of the rail sample 3 after the rail sample 3 is installed is located on the top surface of the long beam 2, and the 16mm measuring line below the rail head of the working side of the rail is located on the inner side of the long beam 2, thereby ensuring the gauge measurement accuracy based on the rail profile. Due to the existence of the installation surface, only a single bolt hole can be set on the installation device. When replacing rail profile samples 3 of different models, the installation is convenient and efficient, and the repeatability accuracy is high.

[0042] Furthermore, a variety of rail profile sample block forms can be designed and processed, including but not limited to conventional single-rail profiles (43kg / m rails, 50kg / m rails, 60kg / m rails and 75kg / m rails, etc.) and combined rail profiles in the switch area (pointed / basic rails, heart / wing rails, etc.). The combined rail profile includes the structural features of two rail heads. During the design of the combined profile section, the height difference and lateral distance between the two rail heads in the combined rail profile can be adjusted to simulate the reduction value, flange groove width and gap parameters between the rail parts. The combined rail profile of the switch area is installed on the calibration platform using the rail profile sample installation device, the combined rail profile is measured and the corresponding parameters of the structural features are solved in the corresponding direction, which can be used to realize the calibration of parameters such as rail reduction value, flange groove width, gap, etc.

[0043] (3) A comprehensive verification method for the structural dimension parameters of turnouts.

[0044] A turnout structure dimension parameter calibration bracket 4 is designed, and the bracket 4 is installed on the bottom plate 11 of the calibration platform, and a pad 41 can be installed on the top of the bracket 4. The pad 41 can slide laterally along the top surface of the bracket, and is used to calibrate the parameters of wheel rim grooves of different widths. The pad 41 can be set with different thicknesses, and is used to calibrate the height difference of the rails. A slide groove can be set on the top of the bracket 4 to implement the lateral movement of the pad 41, and the adjustability of the wheel rim groove parameters can also be implemented in combination with the lateral adjustment amount of the movable long beam 22. In this embodiment, bracket mounting holes are set on the inner sides of the double calibration long beams 22 and 23 of the bottom plate 11 of the calibration platform, and a pair of turnout structure dimension parameter calibration brackets 4 can be installed at the same time to improve the calibration efficiency. By arranging a pair of turnout structural dimension parameter verification brackets 4 on the inner side of the double verification long beams 22 and 23, a complex combination of rail parts with a maximum of four rail parts on the turnout detection section is simulated, and the verification of transverse dimension parameters including the wheel flange groove width of the point rail / basic rail, the wheel flange groove width of the heart rail / wing rail, the wheel flange groove width of the guide rail / guard rail, the inspection interval of the heart rail / guard rail, and the back protection distance of the wing rail / guard rail is realized. By adding pads 41 of different heights to the bracket 4, the verification of vertical dimensions such as the height difference of the guard rail is realized.

[0045] The flange groove width calibration method can be adapted to both the contact flange groove width measurement scheme based on contact sensors and the non-contact flange groove width detection scheme based on optical sensors. The specific calibration method is as follows: The long beam 2 of the calibration platform is used to simulate the wheel running rail, and the multifunctional inspection instrument is placed on the long beam 2. The equipment is moved along the length direction of the long beam so that the flange groove measurement section of the inspection instrument is within the range of the rail profile sample 3. For the contact measurement equipment, the flange groove width measurement sensor is contacted with the inner working edge of the pad 41 opposite to the rail profile sample 3 to read the flange groove width measurement value of the equipment; for the non-contact flange groove width measurement equipment, the cross-sectional profiles of the rail sample 3 and the pad 41 are collected at the same time, and the lateral distance between the horizontal position corresponding to the pad 41 and the working edge of the rail 16 mm below the head is calculated, which is the flange groove width measurement value.

[0046] The specific verification method of rail height difference is as follows: the long beam 2 of the verification platform is used to simulate the wheel running rail, the multifunctional inspection instrument is placed on the long beam 2, and the equipment is moved along the length direction of the long beam so that the wheel flange groove measurement section of the inspection instrument is within the range of the rail profile sample 3. At the same time, the cross-sectional profiles of the rail sample 3 and the pad 41 are collected, and the vertical distance between the highest point of the rail head and the highest point of the pad is solved, which is the measured value of the rail height difference.

[0047] It can be mainly divided into the following parts:

[0048] 1. A railway multifunctional inspection instrument calibration platform.

[0049] A railway multifunctional inspection instrument calibration platform can realize integrated calibration and calibration of track geometry, turnout structure dimensions and rail profile items. Specifically, the turnout structure dimension calibration should include parameters such as the reduction value, wheel flange groove width, inspection interval, back guard distance, wing rail interval, guardrail interval and rail height difference; rail profile calibration is applicable to conventional single-track profiles and combined rail profiles in the turnout area, and is applicable to different rail types (43kg / m rails, 50kg / m rails, 60kg / m rails and 75kg / m rails, etc.); the designed track geometry calibration scheme is applicable to both the contact measurement scheme using a displacement sensor and the non-contact detection scheme using an optical sensor. Among them, the contact detection scheme uses a contact displacement sensor to obtain the gauge parameters; the non-contact detection scheme first collects the rail profile, and obtains the gauge parameters based on the profile data.

[0050] 2. A verification method that combines rail profile verification with track geometry verification.

[0051] The rail profile sample block is innovatively added to the calibration long beam of the existing track inspection instrument calibration platform to achieve comprehensive calibration of rail profile and track geometry. It is compatible with track geometry calibration of both contact and non-contact detection schemes. A variety of rail profile sample blocks are set up to achieve single rail profile and combined rail profile calibration of different rail types.

[0052] 3. A high-precision and quick installation structure for rail profile samples.

[0053] A groove is made perpendicular to the working surface on the long beam for track geometry parameter calibration. The groove width matches the thickness of the rail profile sample block to ensure that the measured section is parallel to the standard size section after the sample block is installed, that is, to ensure the accuracy of the rail profile size. The installation structure of the profile sample block is set below the rail head, and is provided with two high-precision machined mounting surfaces on the side and top surfaces to ensure that the highest point of the rail top is coplanar with the top surface of the long beam after the sample block is installed, and the point 16mm below the working edge of the rail is coplanar with the inner side surface of the long beam, that is, to ensure the calibration accuracy of the non-contact track geometry. A single threaded hole is set on the installation device, and a single bolt through hole is set at the corresponding position of the rail waist of the rail sample block. The bolt is only used to apply locking force along the axial direction of the bolt, and the installation is convenient and efficient.

[0054] 4. A comprehensive verification method for turnout structural dimension parameters.

[0055] A pair of turnout structure dimension parameter calibration brackets are provided on the inner side of the double calibration long beams to realize the calibration of the lateral position dimensions and vertical position dimensions between complex combined rail parts.

[0056] 4.1 Wheel flange groove width calibration device.

[0057] By setting a pair of turnout structural dimension parameter verification brackets on the inner side of the double verification long beam, the complex combination of rail parts with up to four rail parts on the turnout detection section is simulated to realize the verification of transverse dimension parameters including the flange groove width of the point rail / basic rail, the flange groove width of the heart rail / wing rail, the flange groove width of the guide rail / guard rail, the inspection interval of the heart rail / guard rail, and the back protection distance of the wing rail / guard rail. During the verification process, the parameter adjustability is realized by using the movable long beam and adjusting the transverse position of the flange groove measurement structure block.

[0058] 4.2 Device for testing relative height difference between rail parts.

[0059] The height difference parameter adjustability is achieved by adding different pad block structures to the wheel rim groove width bracket.

[0060] 5. A method for verifying turnout structural parameters based on rail profile.

[0061] The combined rail profile sample blocks in the turnout area (point / basic rail, heart / wing rail, guard rail / guide rail, etc.) can be designed and processed, and the combined rail profile sample blocks in the turnout area can be installed on the calibration table using the rail profile sample installation device, which can be used to realize the calibration of parameters such as rail reduction value, gap value, and flange groove width.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A railway multifunctional inspection instrument calibration platform, comprising an upper base plate (11) and a calibration platform long beam (2), wherein the calibration platform long beam (2) comprises a fixed long beam (23) and a movable long beam (22), wherein the fixed long beam (23) and the movable long beam (22) are respectively provided with a long beam support (21), characterized in that: The fixed long beam (23) and the movable long beam (22) are provided with rail profile blocks (3) opposite to each other, and the track gauge is verified by measuring the lateral distance between the left and right rail profile blocks (3); a groove is opened in a direction perpendicular to the length of the long beam (2) of the verification platform, and the groove width is matched with the thickness of the rail profile block (3), so that when the profile measurement section of the inspection instrument is perpendicular to the length direction of the long beam (2) of the verification platform, it is also perpendicular to the thickness direction of the rail profile block (3), that is, the measured section of the rail profile is parallel to the standard size section.

2. The railway multifunctional inspection instrument calibration platform according to claim 1 is characterized in that: A variety of rail profile sample blocks (3) can be provided, including single rail profile sample blocks (321) and combined rail profile sample blocks (322), so that single rail profile and combined rail profile verification of different rail types can be realized.

3. The railway multifunctional inspection instrument calibration platform according to claim 1 is characterized in that: It also includes a rail profile sample installation device (31), which is provided with two high-precision machined installation surfaces, namely an inner side installation surface (311) and a top surface installation surface (312), and the device is installed on the long beam support (21) of the calibration platform. The side and top surface installation surfaces are correspondingly arranged below the rail head of the rail profile sample (3). During installation, the horizontal installation surface below the rail head of the rail profile sample (3) is placed on the top surface installation surface (312) of the device, and the installation bolts (313) are tightened so that the vertical installation surface below the rail head of the rail profile sample (3) is against the inner side installation surface (311) of the device, and the installation is completed; after the rail sample (3) is installed, the highest point of the rail top of the rail sample is located on the top surface of the long beam (2), and the 16mm measuring line below the rail head of the working side of the rail is located on the inner side of the long beam (2).

4. The railway multifunctional inspection instrument calibration platform according to any one of claims 1 to 3, characterized in that: The invention also comprises a turnout structure dimension parameter verification bracket (4), the bracket (4) being installed on a bottom plate (11) on a verification platform, and a cushion block (41) being installed on the top of the bracket (4); the cushion block (41) being able to slide laterally on the top surface of the bracket, and being used for verifying the parameters of wheel flange grooves of different widths; the cushion block (41) being able to be set with different thicknesses, and being used for verifying the height difference of rails; a slide groove being able to be arranged on the top of the bracket (4) for implementing the lateral movement of the cushion block (41), and being able to implement the adjustability of the wheel flange groove parameters in combination with the lateral adjustment amount of the movable long beam (22).

5. The railway multifunctional inspection instrument calibration platform according to claim 4 is characterized in that: Bracket mounting holes are arranged on the inner sides of the double calibration long beams (22) and (23) on the bottom plate (11) of the calibration platform, and a pair of turnout structure dimension parameter calibration brackets (4) can be installed at the same time, thereby improving the calibration efficiency; by arranging a pair of turnout structure dimension parameter calibration brackets (4) on the inner sides of the double calibration long beams (22) and (23), a complex combination of rail parts with a maximum of four rail parts on the turnout detection section is simulated, thereby realizing the calibration of transverse dimension parameters including the wheel flange groove width of the point rail / basic rail, the wheel flange groove width of the heart rail / wing rail, the wheel flange groove width of the guide rail / guard rail, the inspection interval of the heart rail / guard rail, and the back guard distance of the wing rail / guard rail.

6. The railway multifunctional inspection instrument calibration platform according to claim 5 is characterized by: By installing cushion blocks (41) of different heights on the bracket (4), the vertical dimensions such as the height difference of the guardrail can be verified.

7. The railway multifunctional inspection instrument calibration platform according to claim 4 is characterized by: The combined rail profile sample (322) of the turnout area can be designed and processed, including the tip / basic rail, the heart / wing rail, etc., the guard rail / guide rail, and the combined rail profile sample of the turnout area is installed on the calibration platform by using the rail profile sample installation device, which can be used to realize the calibration of parameters such as rail reduction value, gap value, flange groove width, etc.

8. A verification method integrating rail profile verification and track geometry verification, characterized in that: The test bench as claimed in claims 1 to 7 comprises the following steps: The long beam (2) of the calibration platform is used to simulate the left and right rails. The multifunctional inspection instrument is placed on the long beam (2), and the equipment is moved along the length direction of the long beam so that the track geometry measurement section of the inspection instrument is located within the range of the rail profile sample (3); for the contact gauge measuring equipment, the gauge measurement sensor is brought into contact with the inner working edge of the rail profile sample (3) to read the gauge measurement value of the equipment; for the non-contact gauge measuring equipment, the cross-sectional profiles of the left and right rail samples (3) are collected simultaneously to read the solved gauge measurement value.

9. A comprehensive method for verifying turnout structural dimension parameters, characterized in that: The test bench as claimed in claim 6 comprises: 1) Wheel flange groove width calibration method: the calibration platform long beam (2) is used to simulate the wheel running rail, the multifunctional inspection instrument is placed on the long beam (2), and the equipment is moved along the length direction of the long beam so that the wheel flange groove measurement section of the inspection instrument is located within the range of the rail profile sample (3); for the contact measurement equipment, the wheel flange groove width measurement sensor is contacted with the inner working edge of the pad (41) opposite to the rail profile sample (3), and the wheel flange groove width measurement value of the equipment is read; for the non-contact wheel flange groove width measurement equipment, the cross-sectional profiles of the rail sample (3) and the pad (41) are collected at the same time, and the lateral distance between the horizontal position corresponding to the pad (41) at the position (16) mm below the rail head on the working side of the rail is calculated, which is the wheel flange groove width measurement value; 2) The rail height difference calibration method is as follows: the calibration platform long beam (2) is used to simulate the wheel running rail, the multifunctional inspection instrument is placed on the long beam (2), and the equipment is moved along the length direction of the long beam so that the wheel flange groove measurement section of the inspection instrument is located within the range of the rail profile sample block (3). At the same time, the cross-sectional profiles of the rail sample block (3) and the pad block (41) are collected, and the vertical distance between the highest point of the rail head and the highest point of the pad block is calculated, which is the rail height difference measurement value.

10. A method for verifying turnout structural parameters based on rail profile, characterized in that: The calibration platform as described in claims 1 to 7 is used to design and process the combined rail profile sample (322) of the switch area, including the tip / basic rail, the heart / wing rail, etc., the guard rail / guide rail, and the combined rail profile sample of the switch area is installed on the calibration platform using the rail profile sample installation device, which can be used to realize the calibration of parameters such as the rail reduction value, the gap value, and the wheel flange groove width.

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