A railway multifunctional inspection instrument calibration platform and calibration method thereof

Abstract

A multifunctional railway inspection instrument calibration platform incorporates rail profile specimens onto the existing long calibration beam for rail profile and gauge verification. This allows for compatibility between contact and non-contact inspection methods, enabling comprehensive verification of rail profile and track geometry. A quick-installation structure for the rail profile specimens ensures accurate, repeatable assembly and disassembly when replacing different rail specimens, ensuring stable measurement transfer. For turnout structural dimension verification, a flange groove width calibration bracket is designed and installed on the inner side of the existing long calibration beam to simulate the lateral positional relationships between complex rail components in the turnout switch area.

Description

Technical Field

[0001] The present 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 carry out traceability of test data values ​​of testing instruments and calibration of instrument measurement accuracy. At present, railway testing 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 and other items), 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 test items to support the development of railway testing technology and equipment.

[0003] Railway track inspection instrument calibration platforms are only suitable for calibrating track geometry (gauge, level (superelevation), track direction, elevation, gyroscope angle measurement, and other items), and cannot simultaneously meet the calibration requirements of other structural dimensions and rail profiles. To the best of the inventor's knowledge, the railway industry lacks calibration methods and instruments specifically designed for multifunctional track inspection instruments. 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 comprehensively realize the integrated calibration and calibration of track geometry, turnout structure dimensions and rail profile items.

[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, guard rail interval and rail height difference.

[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 base plate and a calibration platform long beam, wherein the calibration platform long beam comprises a fixed long beam and a movable long beam, wherein the fixed long beam and the movable long beam are respectively provided with long beam supports, and the fixed long beam and the movable long beam are respectively provided with rail profile sample blocks facing each other, and track gauge calibration is achieved by measuring the lateral distance between the left and right rail profile blocks; a groove is cut 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 and 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 setting up various types of rail profile samples, the single rail profile and combined rail profile verification of different rail types can be realized.

[0013] Furthermore, it also includes a rail profile sample installation device, which is provided with two high-precision machined installation surfaces, the inner side installation surface and the top surface installation surface, and the device is installed on the long beam support of the calibration platform. The side and top surface installation surfaces are correspondingly provided 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 surface 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 side 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 mm measuring line below the rail head of the rail working side is located on the inner side of the long beam.

[0014] Furthermore, the system includes a turnout structural dimension parameter calibration bracket mounted on the calibration platform baseplate. A pad can be mounted on the bracket's top. The pad can slide laterally along the bracket's top surface to calibrate wheel flange groove parameters of varying widths. The pad can be configured with varying thicknesses to calibrate rail height differences. A slideway can be provided on the bracket's top to facilitate lateral movement of the pad, and the flange groove parameters can also be adjusted in conjunction with lateral adjustment of the movable long beam.

[0015] Furthermore, bracket mounting holes are provided on the inner sides of the dual calibration beams on the bottom plate of the calibration platform, allowing for the simultaneous installation of a pair of calibration brackets for turnout structural dimension parameters, thus improving calibration efficiency. By installing a pair of calibration brackets on the inner sides of the dual calibration beams, a complex rail assembly with up to four rails on the turnout inspection section can be simulated, enabling calibration of transverse dimensional parameters including the wheel flange groove width of the point rail / stock rail, the wheel flange groove width of the center rail / wing rail, the wheel flange groove width of the guide rail / guard rail, the inspection interval between the center rail / guard rail, and the back guard distance between the wing rail / guard rail.

[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 (tip / basic rails, heart / wing rails, guard rails / guide rails, 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-mentioned verification platform, includes the following steps:

[0019] The long beam of the calibration platform simulates the left and right rails. The multifunctional gauge is placed on the beam and the device is moved along its length, ensuring that the gauge measurement section is within the rail profile sample. For contact gauge measuring equipment, the gauge sensor is brought into contact with the inner working edge of the rail profile sample to read the gauge measurement. For non-contact gauge measuring equipment, the cross-sectional profiles of both rail samples are simultaneously captured and the calculated gauge measurement is read.

[0020] A comprehensive method for verifying turnout structural dimensional parameters, using the above-mentioned verification platform, comprises:

[0021] 1) Verification method for flange groove width: The long beam of the calibration platform is used to simulate the wheel running on the rail. 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 flange groove measurement section of the inspection instrument is within the range of the rail profile sample. For contact measuring equipment, the flange groove width measurement sensor is brought into contact with the inner working edge of the pad opposite to the rail profile sample to read the flange groove width measurement value of the equipment. For non-contact flange groove width measurement equipment, the cross-sectional profiles of the rail sample and the pad are collected simultaneously. The lateral distance (mm) below the rail head on the working edge of the rail and the horizontal position corresponding to the pad is calculated as the flange groove width measurement value.

[0022] 2) The rail height difference calibration method is as follows: The long beam of the calibration platform simulates a wheel running on a rail. The multifunctional inspection instrument is placed on the long beam and the device is moved along the length of the long beam so that the inspection instrument's wheel flange groove measurement section is within the range of the rail profile sample. The cross-sectional profiles of the rail sample and the spacer are simultaneously collected, and the vertical distance between the highest point of the rail head and the highest point of the spacer is calculated to obtain the rail height difference measurement value.

[0023] A method for calibrating turnout structural parameters based on rail profile adopts the above-mentioned calibration platform to design and process the combined rail profile sample blocks of the turnout area (point / base rail, heart / wing rail, etc., guard rail / guide rail, etc.), and uses the rail profile sample block installation device to install the combined rail profile sample blocks 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 has the following advantages due to the adoption of the above technical solution:

[0025] The present invention addresses the problem that existing track inspection instrument calibration platforms lack the multifunctional calibration capabilities for parameters such as turnout structural dimensions and rail profiles, and proposes an integrated comprehensive solution. This solution can efficiently and accurately guarantee the detection accuracy of new-era railway comprehensive testing instruments, and support the development and application of railway testing technology and equipment.

[0026] In terms of rail profile verification and track gauge verification, rail profile samples are innovatively added to the verification long beam of the existing track inspection instrument verification platform, achieving verification compatibility of both contact and non-contact detection schemes, and realizing comprehensive verification 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 transmission.

[0027] In terms of the calibration of the turnout structure dimensions, a wheel 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 beam of the gauge; the height difference parameter adjustability is achieved by adding different spacer block structures to the wheel 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 structural diagram of the installation device of the present invention;

[0030] Figure 3 This is a schematic diagram of a rail profile sample block according to the present invention;

[0031] Reference numerals:

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

[0033] 3 Rail profile sample; 31 Rail profile sample mounting device; 311 Inner side mounting surface; 312 Top surface mounting surface; 313 Mounting bolt; 321 Single rail profile sample; 322 Combined rail profile sample. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within 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, they indicate 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 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, and the fixed long beam 23 and the movable long beam 22 are respectively provided with rail profile sample blocks 3 opposite to each other, 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 sample 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 and the thickness direction of the rail profile sample block 3, that is, the measured section of the rail profile is parallel to the standard size section.

[0037] (1) A verification method that integrates rail profile verification and track geometry verification.

[0038] The present invention is an upgrade based on the existing track inspection instrument calibration platform. Rail profile samples 3 are added to the two calibration long beams 2. Track gauge calibration is achieved by measuring the lateral distance between the left and right rail profile blocks. It can adapt to both contact gauge measurement schemes based on displacement sensors and non-contact gauge detection schemes based on optical sensors. The specific calibration method is as follows: the calibration platform long beam 2 is used to simulate the left and right rails. The multifunctional inspection instrument is placed on the long beam 2. The equipment is moved along the length of the long beam so that the inspection instrument's track geometry measurement section is within the range of the rail profile sample 3. For contact gauge measurement equipment, the gauge measurement sensor is brought into contact with the inner working edge of the rail profile sample 3 to read the equipment's gauge measurement value; for non-contact gauge measurement equipment, the cross-sectional profiles of the left and right rail samples 3 are collected simultaneously, and the calculated 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, which has the advantage of high calibration efficiency; for contact gauge measuring equipment, when the track geometry measurement section and the rail profile measurement section are not coplanar, 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 area of ​​the rail profile sample block 3, thus completing the switching collection of the rail profile and track geometry, 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 slot is cut in a direction perpendicular to the length of the calibration platform long beam 2, and the slot width is matched 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 accuracy of the rail profile size.

[0041] A rail profile specimen mounting device 31 is designed, featuring two high-precision machined mounting surfaces: an inner mounting surface 311 and a top mounting surface 312. The device is mounted on the long beam support 21 of the calibration platform. The side and top mounting surfaces are correspondingly positioned below the rail head of the rail profile specimen 3. During installation, the horizontal mounting surface below the rail head of the rail profile specimen 3 is placed on the top mounting surface 312 of the device. The mounting bolts 313 are tightened, so that the vertical mounting surface below the rail head of the rail profile specimen 3 abuts the inner mounting surface 311 of the device, completing the installation. This mounting device and method ensure that, after installation, the highest point of the rail sample 3 is located on the top surface of the long beam 2, and the 16mm measuring line below the working edge of the rail is located on the inner side of the long beam 2, thereby ensuring accurate gauge measurement based on the rail profile. Due to the mounting surfaces, only a single bolt hole is required on the mounting device, making installation convenient, efficient, and highly repeatable when replacing different models of rail profile specimens 3.

[0042] Furthermore, a variety of rail profile sample forms can be designed and processed, including but not limited to conventional single-rail profiles (43kg / m rail, 50kg / m rail, 60kg / m rail and 75kg / m rail, etc.) and combined rail profiles in the switch area (tip / basic rail, heart / wing rail, 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, wheel 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, wheel flange groove width, gap, etc.

[0043] (3) A comprehensive verification method for turnout structural dimensional parameters.

[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 on the top surface of the bracket, and is used to calibrate the parameters of wheel flange grooves of different widths. The pad 41 can be set to 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 flange 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 installing a pair of turnout structural dimension parameter verification brackets 4 inside the dual verification long beams 22 and 23, a complex rail assembly with up to four rails on the turnout inspection section is simulated, enabling verification of transverse dimensional parameters such as the wheel flange groove width of the point rail / stock rail, the wheel flange groove width of the center rail / wing rail, the wheel flange groove width of the guide rail / guard rail, the inspection interval between the center rail and guard rail, and the distance between the wing rail and guard rail back guard. By adding spacers 41 of varying heights to the brackets 4, verification of vertical dimensions such as the height difference of the guard rail is possible.

[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 calibration platform long beam 2 is used to simulate the wheel running on the rail, the multifunctional inspection instrument is placed on the long beam 2, and the device 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 contact measurement equipment, the flange groove width measurement sensor is brought into contact 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 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 head 16 mm below the rail is calculated, which is the flange groove width measurement value.

[0046] The specific verification method for rail height difference is as follows: The long beam 2 of the calibration platform is used to simulate the wheel running on the rail. The multifunctional inspection instrument is placed on the long beam 2. The device is moved along the length of the long beam so that the inspection instrument's wheel flange groove measurement section is within the range of the rail profile sample 3. The cross-sectional profiles of the rail sample 3 and the spacer 41 are simultaneously collected, and the vertical distance between the highest point of the rail head and the highest point of the spacer is calculated to obtain the measured 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 comprehensively realize the 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 contact measurement schemes using displacement sensors and non-contact detection schemes using optical sensors. Among them, 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.

[0050] 2. A verification method that integrates rail profile verification and track geometry verification.

[0051] The innovative addition of rail profile specimens to the existing track inspection instrument's calibration beam enables comprehensive verification of rail profile and track geometry. This system is compatible with both contact and non-contact track geometry verification. A variety of rail profile specimens are available to verify single and combined rail profiles for various track types.

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

[0053] A slot is cut perpendicular to the working surface on the long beam for track geometry parameter verification. The slot 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, thus ensuring the accuracy of the rail profile dimensions. The installation structure of the profile sample block is set below the rail head and is equipped 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, thus ensuring the accuracy of the non-contact track geometry verification. A single threaded hole is set on the installation device, and a single bolt through-hole is set at the corresponding position on the waist of the rail sample block. The bolt is only used to apply locking force along the axial direction of the bolt, making installation convenient and efficient.

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

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

[0056] 4.1 Flanged groove width calibration device.

[0057] By installing a pair of turnout structural dimension parameter verification brackets inside the dual verification long beams, a complex rail assembly with up to four rails on the turnout inspection section can be simulated. This allows verification of transverse dimensional parameters such as the wheel flange groove width of point rail / stock rail, wheel flange groove width of center rail / wing rail, wheel flange groove width of guide rail / guard rail, inspection interval between center rail / guard rail, and back guard distance between wing rail and guard rail. Parameter adjustability is achieved during the verification process by using a movable long beam and adjusting the lateral position of the wheel flange groove measurement structure.

[0058] 4.2 Device for measuring relative height difference between rail components.

[0059] The height difference parameter can be adjusted by adding different spacer 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 / base 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 various 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 slot is provided in a direction perpendicular to the length of the calibration platform long beam (2), and the slot 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) and the thickness direction of the rail profile block (3), the measured section of the rail profile is parallel to the standard size section; The invention also includes a turnout structure dimension parameter verification bracket (4), the bracket (4) is installed on the bottom plate (11) of the verification platform, and a pad (41) can be installed on the top of the bracket (4); the pad (41) can slide laterally on the top surface of the bracket, and is used to verify the parameters of wheel flange grooves of different widths; the pad (41) can be set to different thicknesses, and is used to verify 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 flange groove parameters can also be implemented in combination with the lateral adjustment amount of the movable long beam (22).

2. The railway multifunctional inspection instrument calibration platform according to claim 1, 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), and single rail profile and combined rail profile verification of different rail types can be achieved.

3. The railway multifunctional inspection instrument calibration platform according to claim 1, characterized in that: The invention also comprises 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 is installed on a long beam support (21) of a calibration platform; the side and top surface installation surfaces are correspondingly provided 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 abutted against the inner side installation surface (311) of the device, thereby completing the installation; after the rail profile 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 measuring line 16 mm below the rail head of the rail working side 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: Bracket mounting holes are provided on the inner sides of the double verification long beams of the bottom plate (11) of the verification platform, and a pair of turnout structure dimension parameter verification brackets (4) can be installed at the same time, thereby improving the verification efficiency. By arranging a pair of turnout structure dimension parameter verification brackets (4) on the inner sides of the double verification long beams, a complex combination rail member situation in which at most four rail members exist on the turnout detection section is simulated, thereby realizing 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 guard distance of the wing rail / guard rail.

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

6. The railway multifunctional inspection instrument calibration platform according to claim 1, characterized in that: The combined rail profile sample (322) of the turnout area can be designed and processed, including a tip / basic rail, a heart / wing rail, etc., and a guard rail / guide rail. The combined rail profile sample of the turnout area is installed on a calibration platform using a rail profile sample installation device, and can be used to realize the calibration of parameters such as rail reduction value, gap value, and wheel flange groove width.

7. A verification method integrating rail profile verification and track geometry verification, characterized in that: The test bench according to any one of claims 1 to 6 is used, comprising the following steps: The long beam (2) of the calibration platform is used to simulate the left and right rails. A multifunctional inspection instrument is placed on the long beam (2), and the device 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 a contact gauge measuring device, the gauge measurement sensor is brought into contact with the inner working edge of the rail profile sample (3) to read the device gauge measurement value; for a non-contact gauge measuring device, the cross-sectional profiles of the left and right rail profile samples (3) are collected simultaneously to read the calculated gauge measurement value.

8. A comprehensive method for verifying turnout structural dimensional parameters, characterized in that: The test platform according to claim 5 comprises: 1) Wheel flange groove width verification method: the verification 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 measuring 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 profile sample (3) and the pad (41) are collected at the same time, and the horizontal distance between the horizontal position corresponding to the pad (41) at (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 device 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); at the same time, the cross-sectional profiles of the rail profile 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 calculated, which is the rail height difference measurement value.

9. A method for verifying turnout structural parameters based on rail profile, characterized in that: A calibration platform as described in any one of claims 1 to 6 is used to design and process a switch area combined rail profile sample (322) including a point / basic rail, a heart / wing rail, a guard rail / guide rail, etc. The switch area combined rail profile sample is installed on the calibration platform using a 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.

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