Medium-low speed magnetic levitation F rail gauge and slab staggering measuring scale

Abstract

The utility model provides a gauge and slab staggering measuring scale for a medium-low speed magnetic levitation F rail. The gauge and slab staggering measuring scale comprises a gauge measuring mechanism, a slab staggering measuring mechanism and an electrical control module, and the gauge measuring mechanism comprises a main beam, a supporting seat, an abutting point, a dial indicator and a non-contact gauge sensor; the slab staggering measuring mechanisms are symmetrically hinged to the two ends of the main beam through detachable hinge mechanisms, and each slab staggering measuring mechanism comprises a swing arm, a mounting plate and three non-contact slab staggering sensors; the electrical control module is in circuit connection with the track gauge sensor and the slab staggering sensor and used for obtaining and displaying an F-track track gauge value and an F-track slab staggering value according to the distances measured by the track gauge sensor and the slab staggering sensor. According to the scheme, a non-contact measurement mode is adopted, track gauge and slab staggering can be automatically detected and displayed, track damage caused by contact measurement and measurement errors caused by manual visual reading are avoided, the measurement efficiency and precision are improved, and meanwhile the great safety problem existing in manual slab staggering measurement is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of track measurement, in particular to a medium- and low-speed magnetic levitation F-track gauge and misalignment measuring ruler. Background Art

[0002] The gauge of the F-rail for medium and low speed maglev trains is related to the distance between the bottom of the maglev train and the track. If it is too large or too small, it will affect the lateral suction of the maglev train. The vertical misalignment of the F-rail affects the suspension state of the maglev train, and in severe cases, it causes severe vibration of the train and even causes the suspension system to become unstable and collapse. The deviation of the geometric parameters of the F-rail seriously affects the safe operation of medium and low speed maglev trains.

[0003] For the detection of F-rail geometric parameters, there are currently low-speed static track inspection instruments and high-speed dynamic inspection equipment installed on maglev trains or inspection vehicles. Track deviations detected by the above-mentioned inspection equipment require manual on-site verification, and manual verification currently mostly uses tools such as steel rulers and feeler gauges for measurement. This method is complex to operate and requires manual visual measurement, so the measurement efficiency and verification accuracy are relatively low. In addition, since the F-rail hangs out of the track beam, there is a great safety risk when manually measuring the misalignment. Utility Model Content

[0004] The utility model provides a medium and low speed magnetic levitation F rail gauge and misalignment measuring ruler to solve the technical problems of low measurement efficiency, large error and safety risk in the prior art.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A medium and low speed maglev F rail gauge and misalignment measuring ruler, comprising a gauge measuring mechanism, a misalignment measuring mechanism, and an electrical control module, wherein:

[0007] The track gauge measuring mechanism includes a main beam, a support seat, a support point, a dial indicator, and a non-contact track gauge sensor. The support seats are symmetrically installed at positions of the lower part of the main beam opposite to the outer sides of the sliding surfaces of the F-rail flanges on both sides. The lower part of one end of the main beam is provided with a support point with a probe, and the lower part of the other end is provided with a dial indicator with a telescopic probe. The track gauge sensors are symmetrically arranged at the lower part of the main beam near the sliding surfaces of the F-rails on both sides, and are used to measure the distance to the inner end surface of the sliding surface of the F-rail;

[0008] The misalignment measuring mechanism is symmetrically hinged at both ends of the main beam through a detachable hinge mechanism, and includes a swing arm, a mounting plate, and three non-contact misalignment sensors. One end of the swing arm is hinged to the end of the main beam, and the other end is fixedly connected to the mounting plate. The misalignment sensors are arranged on the mounting plate at intervals along a straight line. When measuring the track gauge, the swing arm is rotated so that the three non-contact misalignment sensors are located at a recovery position away from the magnetic pole surface of the F rail. When measuring the misalignment, the swing arm is rotated so that the three non-contact misalignment sensors are located at a measuring position to measure the distance between the magnetic pole surfaces of the F rail on both sides of the rail gap.

[0009] The electrical control module is connected to the track gauge sensor and the misalignment sensor circuits respectively, and is used to obtain the F-rail gauge value and the F-rail misalignment value according to the distances measured by the track gauge sensor and the misalignment sensor and to display them.

[0010] Furthermore, the main beam is a hollow profile structure, which is used to provide support and installation interfaces for structural parts and electrical components.

[0011] Furthermore, the probe of the abutment point and the telescopic probe of the dial indicator both adopt a rolling ball head structure.

[0012] Furthermore, the track gauge measuring mechanism also includes a switch-type magnetic attraction, which is arranged in the support seat and is used to make the support seat firmly attracted to the F rail.

[0013] Furthermore, the swing arm includes two side plates arranged in parallel and a connecting column connected between the two side plates arranged in parallel.

[0014] Furthermore, the articulated mechanism includes a first rotating seat, a second rotating seat, a pin, and a limiting device. The first rotating seat and the second rotating seat are hinged to each other by a pin. The other end of the first rotating seat is fixedly connected to one end of the swing arm, and the other end of the second rotating seat is detachably connected to the end of the main beam. The limiting device is fixedly arranged at the end of the main beam to limit the swing angle of the swing arm after the swing arm is unfolded.

[0015] Furthermore, the limiting device adopts a limiting plate or a limiting column, which abuts against the swing arm to limit the swing angle of the swing arm after the swing arm is rotated to the measuring position.

[0016] Furthermore, the misalignment measuring mechanism also includes a recovery locking device, which is used to lock the swing angle of the swing arm after the swing arm is rotated to the recovery position.

[0017] Furthermore, the recovery locking device includes a clamp seat, a lock body, and a hook body. The hook body is fixed on the swing arm, the clamp seat is fixed on the main beam, and the lock body is fixed on the clamp seat. When the misalignment measurement is completed and the swing arm is rotated to the recovery position, the hook body is pulled by the lock body to lock the swing arm in the recovery position.

[0018] Furthermore, the electrical control module includes a power supply, a control unit, a collection unit, and a display screen. The power supply provides a power source for the control unit, the collection unit, the display screen, the gauge sensor, and the misalignment sensor through electrical connection; the collection unit is communicatively connected with the gauge sensor and the misalignment sensor, and is used to collect the distances measured by the gauge sensor and the three non-contact misalignment sensors and transmit them to the control unit; the control unit is communicatively connected with the collection unit and the display screen, and is used to obtain the F-rail gauge value and the misalignment value according to the distance collected by the collection unit, and display them in real time through the display screen.

[0019] The utility model has the following beneficial effects:

[0020] The present application provides a medium- and low-speed maglev F-rail gauge and misalignment measuring ruler, comprising a gauge measuring mechanism, a misalignment measuring mechanism, and an electrical control module, wherein the gauge measuring mechanism is used to measure the distance to the inner end face of the F-rail sliding surface, and the misalignment measuring mechanism is symmetrically hinged at both ends of the main beam through a detachable hinge mechanism, and is used to measure the distance between the F-rail magnetic pole faces on both sides of the rail gap, and the electrical control module is used to obtain the F-rail gauge value and the F-rail misalignment value according to the distances measured by the gauge sensor and the misalignment sensor and display them. This solution adopts a non-contact measurement method, which can realize automatic detection and display of track gauge and misalignment, avoids damage to the track caused by contact measurement and measurement errors caused by manual visual reading, and improves measurement efficiency and accuracy. In addition, this application avoids the problem of great safety risks in manual measurement of misalignment due to the F rail hanging out of the track beam, and is safe and reliable. In addition, the misalignment detection mechanism of the application adopts a modular design, which can be rotated relative to the track gauge measurement module and can be quickly assembled and disassembled, which is convenient for the transfer of the measurement location and selective disassembly and carrying according to measurement needs. It has strong adaptability, flexibility and convenience.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the medium and low speed magnetic levitation F rail gauge and misalignment measuring ruler of the preferred embodiment of the utility model (the misalignment measuring module is in the unfolded state).

[0024] Figure 2It is a schematic diagram of the main view of the medium and low speed maglev F rail gauge and misalignment measuring ruler of the preferred embodiment of the utility model (the misalignment measuring module is in a recovered state).

[0025] Figure 3 It is a schematic diagram of the track gauge measurement principle of the preferred embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the misalignment measurement principle of a preferred embodiment of the utility model.

[0027] Described in the figure: 1. Main beam; 2. Support seat; 3. Switch-type magnetic suction; 4. Rest point; 5. Dial indicator; 6. Gauge sensor; 7. Power supply; 8. Control unit; 9. Collection unit; 10. Charging interface; 11. Function button; 12. Display screen; 13. Side panel; 14. Connecting column; 15. Mounting plate; 16. Misalignment sensor; 17. First rotating seat; 18. Second rotating seat; 19. Pin; 20. Limiting device; 21. Clamp seat; 22. Lock body; 23. Hook body; 24. Handle. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0029] Reference Figure 1 The preferred embodiment of the utility model provides a medium and low speed magnetic levitation F rail gauge and misalignment measuring ruler, including a gauge measuring mechanism, a misalignment measuring mechanism, and an electrical control module, wherein:

[0030] The track gauge measuring mechanism comprises a main beam 1, a support seat 2, a support point 4, a dial indicator 5, and a non-contact track gauge sensor 6. The main beam 1 is also provided with a handle 24 for easy carrying. The support seat 2 is symmetrically installed at the lower part of the main beam 1 at positions opposite to the outer sides of the sliding surfaces of the F-rail flanges on both sides. The lower part of one end of the main beam 1 is provided with a support point 4 with a probe, and the lower part of the other end is provided with a dial indicator 5 with a telescopic probe. The track gauge sensors 6 are symmetrically arranged at the lower part of the main beam 1 near the sliding surfaces of the F-rails on both sides, and are used to measure the distance to the inner end surface of the sliding surface of the F-rail.

[0031] The misalignment measuring mechanism is symmetrically hinged at both ends of the main beam 1 through a detachable hinge mechanism, and includes a swing arm, a mounting plate 15, and three non-contact misalignment sensors 16. One end of the swing arm is hinged to the end of the main beam 1, and the other end is fixedly connected to the mounting plate 15. The misalignment sensors 16 are arranged on the mounting plate 15 along a straight line at intervals. When measuring the track gauge, the swing arm is rotated to make the three non-contact misalignment sensors 16 located at a recovery position away from the magnetic pole surface of the F rail. When measuring the misalignment, the swing arm is rotated to make the three non-contact misalignment sensors 16 located at a measuring position to measure the distance between the magnetic pole surfaces of the F rail located on both sides of the rail gap.

[0032] The electrical control module is connected to the track gauge sensor 6 and the misalignment sensor 16 circuits respectively, and is used to obtain the F-rail gauge value and the F-rail misalignment value according to the distances measured by the track gauge sensor 6 and the misalignment sensor 16 and display them.

[0033] The present embodiment provides a medium- and low-speed maglev F-rail gauge and misalignment measuring ruler, including a gauge measuring mechanism, a misalignment measuring mechanism, and an electrical control module, wherein the gauge measuring mechanism is used to measure the distance to the inner end face of the F-rail sliding surface, and the misalignment measuring mechanism is symmetrically hinged at both ends of the main beam 1 through an articulated mechanism, and is used to measure the distance between the F-rail magnetic pole faces on both sides of the rail gap, and the electrical control module is used to obtain the F-rail gauge value and the F-rail misalignment value according to the distances measured by the gauge sensor 6 and the misalignment sensor 16 and display them. This solution adopts a non-contact measurement method, which can realize automatic detection and display of track gauge and misalignment, avoids damage to the track caused by contact measurement and measurement errors caused by manual visual reading, and improves measurement efficiency and accuracy. In addition, this application also avoids the problem of great safety risks in manual measurement of misalignment due to the F rail hanging out of the track beam, and is safe and reliable. In addition, the misalignment detection module of this application adopts a modular design, which can be rotated relative to the track gauge measurement module and can be quickly assembled and disassembled, which is convenient for the transfer of the measurement location and selective disassembly and carrying according to measurement needs. It has strong adaptability, flexibility and convenience.

[0034] Preferably, the main beam 1 is a hollow profile structure, which is used to provide support and installation interfaces for structural parts and electrical components, which can reduce weight and make the structure more compact.

[0035] Preferably, the probe of the abutment point 4 and the telescopic probe of the dial indicator 5 both adopt a rolling ball head structure, which reduces damage to the inner end surface of the aluminum reaction plate.

[0036] Preferably, the track gauge measuring mechanism also includes a switch-type magnetic attraction 3, which is arranged in the support base 2 and is used to make the support base 2 firmly attracted to the F rail. The switch-type magnetic attraction 3 can firmly attract the support base 2 to the F rail, thereby preventing the measuring ruler from sliding down or tipping over when measuring on the ramp, and ensuring that the measurement on the ramp is carried out smoothly and reliably.

[0037] Preferably, the swing arm includes two parallel side plates 13 and a connecting column 14 connected between the two parallel side plates 13, so as to ensure the lightness of the swing arm and the rigidity of the misalignment measurement mechanism.

[0038] Preferably, the articulated mechanism includes a first rotating seat 17, a second rotating seat 18, a pin 19, and a limiting device 20. The first rotating seat 17 and the second rotating seat 18 are hingedly connected by the pin 19. The other end of the first rotating seat 17 is fixedly connected to one end of the swing arm, and the other end of the second rotating seat 18 is detachably connected to the end of the main beam 1. The limiting device 20 is fixedly arranged at the end of the main beam 1, and is used to limit the swing angle of the swing arm after the swing arm is unfolded.

[0039] The misalignment detection mechanism of the present embodiment adopts a modular design, can be rotated relative to the track gauge measuring mechanism, and can be quickly assembled and disassembled. For example, when only the track gauge measurement is required, the misalignment measuring mechanism and the track gauge measuring mechanism can be separated by removing the second rotating seat 18 from the main beam 1, which facilitates the transfer of the measurement location and selective disassembly and carrying according to measurement needs. It has strong adaptability, flexibility and convenience.

[0040] Preferably, the limiting device 20 adopts a limiting plate or a limiting column, which abuts against the swing arm to limit the swing angle of the swing arm after the swing arm is rotated to the measuring position.

[0041] The limit device 20 described in this embodiment uses a limit plate or a limit column to make the swing arm rotate to the measuring position and then press against the swing arm to limit the swing angle of the swing arm, thereby ensuring that the three non-contact misalignment sensors 16 can be stably located at the measuring position to measure the distance between the F rail pole surfaces on both sides of the rail gap.

[0042] Preferably, the misalignment measuring mechanism also includes a recovery locking device, which is used to lock the swing angle of the swing arm after rotating the swing arm to the recovery position. When the misalignment measurement is not needed, the misalignment measuring mechanism can be locked in the recovery position to reduce the space occupied by the measuring scale and avoid interference with the track gauge measurement.

[0043] Preferably, the recovery locking device includes a clamp seat 21, a lock body 22, and a hook body 23. The hook body 23 is fixed on the swing arm. The clamp seat 21 is fixed on the main beam 1. The lock body 22 is fixed on the clamp seat 21. When the misalignment measurement is completed and the swing arm is rotated to the recovery position, the hook body 23 is pulled by the lock body 22 to lock the swing arm in the recovery position.

[0044] In this embodiment, the recovery locking device includes a clamp seat 21, a lock body 22, and a hook body 23. After the misalignment measurement is completed, the misalignment measurement mechanism is rotated 90° around the pin 19 to complete the retraction of the misalignment measurement mechanism. The misalignment measurement module is locked by tightening the lock body 22 and the hook body 23. The structure is simple and the locking is reliable.

[0045] Preferably, the electrical control module includes a power supply 7, a control unit 8, a collection unit 9, and a display screen 12. The power supply 7, the control unit 8, and the collection unit 9 are installed in the inner cavity of the main beam 1. The power supply 7 provides a power source for the control unit 8, the collection unit 9, the display screen 12, the gauge sensor 6, and the misalignment sensor 16 through electrical connection; the collection unit 9 is communicatively connected with the gauge sensor 6 and the misalignment sensor 16, and is used to collect the distances measured by the gauge sensor 6 and the three misalignment sensors 16 and transmit them to the control unit 8; the control unit 8 is communicatively connected with the collection unit 9 and the display screen 12, and is used to obtain the F-rail gauge value and the misalignment value according to the distance collected by the collection unit 9, and display them in real time through the display screen 12. The display screen 12 is arranged on the upper side of the main beam 1 on the same side of the function button 11, and can also be used to display the power.

[0046] In addition, the electrical control module may further include a function button 11 and a charging interface 10. The charging interface 10 and the function button 11 are arranged on the side of the main beam 1 near the F rail on one side. When the power is displayed to be low, the charging interface 10 can be used to charge the power supply 7 through an external power supply, thereby avoiding the operational inconvenience caused by replacing the battery.

[0047] Before measurement, first place the measuring ruler on a standard F-rail track row or calibration block. The light outlets of the gauge sensors 6 on the left and right sides of the measuring ruler should face the inner end faces of the F-rail wing plates, and the light outlets of the misalignment sensors 16 under the misalignment measurement mechanism of the measuring ruler should face the magnetic pole face of the F-rail. Press the switch button in the function button 11 on the main beam 1 of the measuring ruler to start the measuring ruler. Press the calibration button in the function button 11 to calibrate the gauge sensor 6 and the misalignment sensor 16 before measurement.

[0048] The working process of the measuring ruler of the above embodiment when measuring the track gauge is as follows:

[0049] Step 1: Place the measuring ruler on the F-rail row so that the support seats 2 on both sides contact the sliding surfaces of the F-rail wing plates on both sides respectively;

[0050] Step 2: Place the abutment point 4 on one side of the measuring ruler against the inner end face of the aluminum reaction plate of the F rail on one side, and at the same time pull the telescopic probe of the dial indicator 5 to make it abut against the inner end face of the aluminum reaction plate of the F rail on the other side;

[0051] Step 3: With the support point 4 as the fulcrum, adjust the measuring ruler along the length direction of the track, and observe the pointer swing from the dial of the dial indicator 5. When the probe extension is the smallest, it means that the measuring ruler has been aligned with the track. At this time, rotate the switch of the switch-type magnetic attraction 3 to make the support seat 2 attract the F track;

[0052] Step 4: Press the switch button in the function button 11 on the main beam 1 of the measuring ruler to start the measuring ruler, press the gauge button in the function button 11 to measure the gauge and display the gauge measurement value on the display screen 12;

[0053] Step 5: After completing the track gauge measurement at this location, move the measuring ruler to the next location by means of the handle 24, and repeat the measurements from the first to fourth steps until the track gauge measurements of all measuring points are completed.

[0054] like Figure 3 As shown, when measuring the track gauge, the distances between the track gauge sensors 6 on both sides of the measuring ruler and the inner end faces of the F rail wing plates are d1′ and d2′ respectively. Assuming that the standard track gauge of the medium and low speed F rail is D, when calibrating the track gauge of the measuring ruler, the distances between the two track gauge sensors 6 stored in the track gauge calibration configuration table and the inner end faces of the F rail wing plates are d1 and d2 respectively. Therefore, the calculation formula for the track gauge measurement value is:

[0055] D+(d1′+d2′)-(d1+d2)

[0056] like Figure 2 As shown, before measuring the track gauge, the misalignment measuring mechanism is first rotated 90° upward around the pin 19, the misalignment measuring mechanism is retracted to the recovery position, and the lock body 22 and the hook body 23 are tightened to lock the misalignment measuring mechanism; if only the track gauge is measured, the misalignment measuring mechanism can be quickly disassembled before measurement, thereby reducing the weight of the measuring ruler, reducing labor intensity, and facilitating track gauge measurement.

[0057] The working process of the measuring ruler of the above embodiment when measuring misalignment is as follows:

[0058] Step 1: Place the measuring ruler on one side of the adjacent F rails, so that the support seats 2 on both sides contact the sliding surfaces of the F rail wing plates on both sides respectively;

[0059] Step 2: Operate according to the second and third steps in the track gauge measurement process;

[0060] Step 3: Loosen the connection between the lock body 22 and the hook body 23, rotate the misalignment measurement mechanism 90° downward around the pin 19 to the measurement position, and position the misalignment measurement structure through the limit plate 20;

[0061] Step 4: Press the misalignment button in the function button 11 on the main beam 1 of the measuring ruler to measure the misalignment and display the misalignment measurement value on the display screen 12;

[0062] Step 5: Rotate the misalignment measuring mechanism 90° around the pin 19, retract the misalignment measuring mechanism to the retracted position, and tighten the lock body 22 and the hook body 23 to lock the misalignment measuring mechanism;

[0063] Step 6: After completing the misalignment measurement at this location, move the measuring ruler to the next location using the handle 24, and repeat steps 1 to 5 until the misalignment measurement of all measuring points is completed.

[0064] like Figure 4 As shown, the installation spacing from 2# sensor to 1# sensor in the X-axis direction is X2, and the installation spacing from 3# sensor to 1# sensor in the X-axis direction is X3. The light outlets of the three misalignment sensors 16 (1#, 2#, 3#) calibrated using the standard F-rail track array or calibration block are on the same coordinate axis (X-axis). The distances between the 1# and 2# sensors and the corresponding F-rail magnetic pole surfaces are Y1 and Y2, respectively, and the distance between the 3# sensor and the corresponding F-rail magnetic pole surface is Y3. Therefore, the coordinates of the measurement points A, B, and C on the F-rail magnetic pole surface of the 1#, 2#, and 3# sensors in the XOY coordinate system are: A (0, Y1), B (X2, Y2), and C (X3, Y3), respectively. The misalignment value d of adjacent F rails is the distance from the measurement point C to the line connecting the measurement points A and B, and the corresponding calculation formula is:

[0065]

[0066] That is to say, the 1# and 2# sensors in the misalignment detection mechanism of the present application are used to measure the magnetic pole surface of the F rail on one side of the track gap, and the 3# sensor is used to measure the magnetic pole surface of the F rail on the other side, and the light outlets of the three non-contact misalignment sensors 16 are on the same coordinate axis, and the distance from a point to a straight line can be used to calculate the platform value d of the adjacent F rails. The above calculation process belongs to conventional geometric calculation, which is simply transferred to the present application and is a simple application of the prior art, and there is no improvement on the method.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A medium and low speed maglev F rail gauge and misalignment measuring ruler, characterized in that: It includes gauge measurement mechanism, misalignment measurement mechanism and electrical control module, among which: The track gauge measuring mechanism comprises a main beam (1), a support seat (2), a support point (4), a dial indicator (5), and a non-contact track gauge sensor (6); the support seats (2) are symmetrically mounted at positions on the lower part of the main beam (1) opposite to the outer sides of the sliding surfaces of the F rail flanges on both sides; the lower part of one end of the main beam (1) is provided with a support point (4) with a probe, and the lower part of the other end is provided with a dial indicator (5) with a telescopic probe; the track gauge sensors (6) are symmetrically arranged at the lower part of the main beam (1) near the sliding surfaces of the F rails on both sides, and are used to measure the distance to the inner end surface of the sliding surface of the F rail; The misalignment measuring mechanism is symmetrically hingedly arranged at two ends of the main beam (1) through a detachable hinge mechanism, and comprises a swing arm, a mounting plate (15), and three non-contact misalignment sensors (16); one end of the swing arm is hingedly connected to the end of the main beam (1), and the other end is fixedly connected to the mounting plate (15); the misalignment sensors (16) are arranged on the mounting plate (15) at intervals along a straight line; when measuring the track gauge, the swing arm is rotated so that the three non-contact misalignment sensors (16) are located at a recovery position away from the magnetic pole surface of the F rail; when measuring the misalignment, the swing arm is rotated so that the three non-contact misalignment sensors (16) are located at a measuring position to measure the distance between the magnetic pole surfaces of the F rail located on both sides of the rail gap; The electrical control module is respectively connected to the track gauge sensor (6) and the misalignment sensor (16) circuits, and is used to obtain the F-rail gauge value and the F-rail misalignment value according to the distances measured by the track gauge sensor (6) and the misalignment sensor (16) and to display them.

2. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The main beam (1) is a hollow profile structure, used to provide support and installation interfaces for structural parts and electrical components.

3. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The probe of the abutment point (4) and the telescopic probe of the dial indicator (5) both adopt a rolling ball head structure.

4. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The track gauge measuring mechanism further comprises a switch-type magnetic attraction (3), wherein the switch-type magnetic attraction (3) is arranged in the support seat (2) and is used to enable the support seat (2) to be firmly attracted to the F rail.

5. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The swing arm comprises two side plates (13) arranged in parallel and a connecting column (14) connected between the two side plates (13) arranged in parallel.

6. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The hinge mechanism comprises a first rotating seat (17), a second rotating seat (18), a pin (19), and a limiting device (20); the first rotating seat (17) and the second rotating seat (18) are hingedly connected via the pin (19); the other end of the first rotating seat (17) is fixedly connected to one end of the swing arm; the other end of the second rotating seat (18) is detachably connected to the end of the main beam (1); and the limiting device (20) is fixedly arranged at the end of the main beam (1) and is used to limit the swing angle of the swing arm after the swing arm is unfolded.

7. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 6, characterized in that: The limiting device (20) adopts a limiting plate or a limiting column, which abuts against the swing arm to limit the swing angle of the swing arm after the swing arm is rotated to the measuring position.

8. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The misalignment measuring mechanism also includes a recovery locking device, which is used to lock the swing angle of the swing arm after the swing arm is rotated to the recovery position.

9. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 8, characterized in that: The recovery locking device comprises a clamp seat (21), a lock body (22), and a hook body (23); the hook body (23) is fixed on the swing arm; the clamp seat (21) is fixed on the main beam (1); the lock body (22) is fixed on the clamp seat (21); when the swing arm is rotated to the recovery position after the misalignment measurement is completed, the hook body (23) is pulled by the lock body (22) to lock the swing arm in the recovery position.

10. The medium and low speed maglev F rail gauge and misalignment measuring ruler according to claim 1, characterized in that: The electrical control module comprises a power supply (7), a control unit (8), a collection unit (9), and a display screen (12); the power supply (7) provides a power source for the control unit (8), the collection unit (9), the display screen (12), the track gauge sensor (6), and the misalignment sensor (16) through electrical connection; the collection unit (9) is communicatively connected with the track gauge sensor (6) and the misalignment sensor (16) to collect distances measured by the track gauge sensor (6) and the three non-contact misalignment sensors (16) and transmit the distances to the control unit (8); the control unit (8) is communicatively connected with the collection unit (9) and the display screen (12) to obtain the F-rail track gauge value and the misalignment value according to the distances collected by the collection unit (9), and display the values ​​in real time through the display screen (12).

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