Track elevation control system and control method for railway business line expansion and transformation

Abstract

The invention discloses a rail elevation control system and control method for railway business line expansion and renovation, the rail elevation control system comprises a laser emitter, a laser receiver, a lifting rod and a handheld terminal display, the laser emitter is fixed on the side of a rail and has a height difference with the ground; the laser receiver is fixed to the top end of the lifting rod, faces the laser transmitter and is used for receiving laser beams transmitted by the laser transmitter, and the handheld terminal display is in wireless communication connection with the laser receiver. The device is simple in structure and convenient to use, one person can independently complete elevation control measurement, the measurement precision is high, and the requirement for rail elevation control is met.

Description

Technical Field

[0001] The present invention relates to the field of track measurement technology, and in particular to a track elevation control system and a control method for capacity expansion and reconstruction of railway operating lines. Background Art

[0002] At present, the elevation control in railway yard reconstruction projects mainly includes the ballast elevation control and the track surface lift control after track replacement. There are three main elevation control methods. The first is to arrange the line displacement piles in the adjacent line or stable area without mechanical interference in advance, and use a large ruler to control the structure elevation according to the point height difference during construction; the second method is also based on the arranged line displacement piles, and the level is used to measure the point height difference during construction to control the structure elevation; the third is to use satellite position technology control, and use the RTK mobile station operation mode for on-site control.

[0003] However, these three elevation control methods all have disadvantages, as follows: the disadvantages of the first method are large manpower investment and low precision. The use of the leveling tape requires the cooperation of four people, and the spirit level on the leveling tape needs to be ensured by manpower. However, due to the on-site environment, it is difficult to ensure the absolute level of the leveling tape; the disadvantages of the second method are time-consuming and labor-intensive to use, and inflexible on-site use. When using it, there is often a situation where there is no place to set up the level or the level has just been set up and has to give way to the machine. It also requires the surveyors to be able to use the level accurately and has high measurement experience; the third method is greatly affected by the number of satellite signals, signal strength, high voltage electricity and other strong magnetic field environments when in use, and the data fluctuates greatly during use, and the deviation in elevation measurement is large. Although it is efficient, the accuracy is uncontrollable. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a track elevation control system and control method for the capacity expansion and reconstruction of railway operating lines. The control system and control method have a simple structure and are easy to use. One person can independently complete the elevation control measurement with high measurement accuracy, meeting the requirements of track elevation control.

[0005] The technical solution of the present invention is:

[0006] A track elevation control system used for capacity expansion and reconstruction of railway operating lines includes a laser transmitter, a laser receiver, a lifting rod and a handheld terminal display. The laser transmitter is fixed to the side of the track and has a height difference with the ground. The laser receiver is fixed to the top of the lifting rod and faces the laser transmitter for receiving the laser beam emitted by the laser transmitter. The handheld terminal display is wirelessly connected to the laser receiver.

[0007] The laser transmitter is installed on a bracket, and a horizontal calibration gyroscope is installed on the laser transmitter.

[0008] The laser receiver includes a single chip microcomputer, a plurality of photodiodes, a scale display screen and a wireless signal transmitter respectively connected to the single chip microcomputer; the plurality of photodiodes are arranged vertically in a row, and a vertically extending electronic scale is displayed on the scale display screen, the center height of the electronic scale is zero scale, the minimum scale value below zero scale is -5cm, the maximum scale value above zero scale is 5cm, and the height difference between adjacent scale lines is 1-2mm. Among the plurality of photodiodes, the photodiode located at the center height corresponds to the zero scale on the electronic scale, and the spacing between adjacent photodiodes is 1-2mm, so that the height of each photodiode setting corresponds to the height of one of the scale lines on the electronic scale, and the single chip microcomputer is wirelessly connected to the handheld terminal display through the wireless signal transmitter.

[0009] The lifting rod includes a fixed rod and a movable rod with the bottom sleeved in the fixed rod. The fixed rod and the movable rod are locked and connected by a locking bolt. A row of scales extending vertically downward is provided on the movable rod. The scale line corresponding to the zero scale value is located at the top of the scale. When the length of the lifting rod is the shortest, the scale line corresponding to the zero scale value on the movable rod is at the same horizontal height as the top of the fixed rod.

[0010] The handheld terminal display includes a microcontroller, a touch screen, a wireless signal receiver, a voice warning device and a memory respectively connected to the microcontroller; the wireless signal transmitter of the laser receiver is wirelessly connected to the wireless signal receiver of the handheld terminal display.

[0011] The voice warning device comprises three types of buzzers, which are an upward buzzer warning device, a zero-level buzzer warning device and a downward buzzer warning device.

[0012] The track elevation control method used for capacity expansion and reconstruction of railway operating lines specifically includes the following methods:

[0013] (1) First, fix the bracket to the contact network column on the side of the track with a height difference from the ground, and install the laser transmitter on the bracket. The lifting rod is vertically placed on the track surface or a known leveling point with a known elevation. The known elevation of the track surface or the known leveling point is H. 已知 The laser receiver on the lifting rod faces the laser transmitter to receive the laser beam emitted by the laser transmitter. The operator holds the handheld terminal display and checks the touch screen of the handheld terminal display to obtain the horizontal height of the laser receiver receiving the laser beam. Then, the horizontal height of the laser receiver on the lifting rod is adjusted. When the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, the locking bolt of the lifting rod is tightened. At this time, the height value of the lifting rod is A, and the elevation corresponding to the height value A is the laser line elevation H. 激 , H激 =A+H 已知 ;

[0014] (2) Place the lifting rod vertically at any position on the rail surface where the elevation is to be determined. The laser receiver on the lifting rod faces the laser transmitter to receive the laser beam emitted by the laser transmitter. The operator holds the handheld terminal display and adjusts the horizontal height of the laser receiver on the lifting rod. When the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, tighten the locking bolt of the lifting rod. At this time, the rod height value B of the lifting rod corresponds to the actual elevation value H of the rail surface at the position where the elevation is to be determined. 实 , that is, H 实 =H 激 -B=A+H 已知 -B;

[0015] (3) The memory of the handheld terminal display stores the vertical curve radius R of the vertical curve section of the track, the front slope value i1 and the rear slope value i2 at the slope change point, and the mileage value K at the slope change point of the vertical curve section of the track. M and the design elevation value H of the rail surface M , the microcontroller of the handheld terminal display calculates the design elevation value of the track surface at any position of the vertical curve section of the track. The specific steps are:

[0016] S31. Calculate the length L and tangent length T of the vertical curve section of the track, as shown in the following formulas (1) and (2):

[0017] L = R × |i1-i2| (1);

[0018] T = L / 2 (2);

[0019] S32, calculate the starting mileage value K of the vertical curve section of the track ZY and the terminal mileage value K YZ , see the following formula (3) and formula (4) for details:

[0020] K ZY =K M -L / 2 (3);

[0021] K YZ =K M +L / 2 (4);

[0022] S33. When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the front slope of the slope change point of the vertical curve section of the track, the following formula (5) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the back slope of the slope change point of the vertical curve section of the track, the following formula (6) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 :

[0023] H 设 =H M ±(K m -K 待 )×|i1|±(K 待 -K zY ) 2 / 2R (5);

[0024] H 设 =H M ±(K 待 -K M )×|i2|±(K YZ -K 待 ) 2 / 2R (6);

[0025] When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (5) and (6) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +;

[0026] In formula (5) and formula (6), K 待 It is the mileage value corresponding to any position of the vertical curve section of the track;

[0027] S34. When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located in front of the vertical curve section of the track, the following formula (7) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located behind the vertical curve section of the track, the following formula (8) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 ;

[0028] H 设 =H M ±(K N -K 待 )×|i1| (7);

[0029] H 设 =H M ±(K 待 -K M )×|i2| (8);

[0030] When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (7) and (8) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +;

[0031] (4) Place the lifting rod vertically on the rail surface at any position where the required elevation is to be found, adjust the height of the lifting rod, and when the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, tighten the locking bolt of the lifting rod and record the height value B at this time. 待 The touch screen is input into the handheld terminal display, and the microcontroller of the handheld terminal display will automatically calculate the design elevation value H of the rail surface at the current position. 设 and the actual elevation value H 实 , and automatically perform difference calculation to obtain the elevation adjustment amount of the track surface at this position of the vertical curve section of the track. Then the elevation adjustment value and elevation adjustment direction are displayed on the touch screen of the handheld terminal display, which is convenient for the staff to check and make corresponding elevation control adjustments. At the same time, the memory records the elevation adjustment amount of the track surface at this position of the vertical curve section of the track.

[0032] When adjusting the horizontal height of the laser receiver on the lifting rod, when any photodiode of the laser receiver receives a photoelectric beam, the single chip microcomputer of the laser receiver receives a signal from the corresponding photodiode, and then confirms the scale value of the electronic scale corresponding to this photodiode. The single chip microcomputer of the laser receiver wirelessly sends the scale value to the handheld terminal display through a wireless signal transmitter, and the microcontroller of the handheld terminal display receives the scale value information through the wireless signal receiver. Then, according to the scale value information, the arrow for adjusting the upward direction or the downward direction on the touch screen is lit, and the adjustment value is displayed and the corresponding upward buzzer warning device or downward buzzer warning device is controlled to continue to beep. The staff adjusts the height of the lifting rod according to the adjustment value and arrow direction on the touch screen. After the lifting rod is adjusted into place, the photodiode corresponding to the zero scale value on the electronic scale receives the light signal, so that the zero level arrow on the touch screen of the handheld terminal display is lit, and the zero level buzzer warning device continues to beep, and the horizontal height of the laser receiver on the lifting rod is adjusted.

[0033] Advantages of the present invention:

[0034] The present invention is composed of a laser transmitter, a laser receiver installed on a lifting rod and a handheld terminal display. It has a simple structure and is easy to set up. When in use, it is only necessary to adjust the height of the lifting rod according to the warning information displayed on the handheld terminal display, and the elevation adjustment value is determined by the final scale value on the lifting rod scale. The operation is simple and the measurement accuracy is high. The accuracy can be visualized and controlled within 2mm, meeting the requirements of track elevation control.

[0035] The handheld terminal display of the present invention can directly calculate the rail surface design elevation value at the position corresponding to any mileage value, and perform difference calculation based on the actual elevation value of the rail surface actually collected, so as to obtain the rail surface elevation adjustment amount at any position of the vertical curve section of the track, and intuitively display and record it. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention when measuring rail surface elevation.

[0037] Figure 2 It is a structural schematic diagram of the lifting rod of the present invention.

[0038] Figure 3 It is a principle block diagram of the present invention, "---" represents the optical link and "—" represents the communication link.

[0039] Figure numerals: 1-bracket, 2-laser transmitter, 3-laser receiver, 31-single chip microcomputer, 32-photodiode, 33-scale display screen, 34-wireless signal transmitter, 4-lifting rod, 41-fixed rod, 42-movable rod, 43-scale ruler, 5-handheld terminal display, 51-microcontroller, 52-touch display screen, 53-wireless signal receiver, 54-voice warning device, 55-memory, 6-contact network column, 7-track. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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 embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See Figure 1-Figure 3 , a track elevation control system for capacity expansion and reconstruction of railway operating lines, comprising a laser transmitter 2, a laser receiver 3, a lifting rod 4 and a handheld terminal display 5 installed on a bracket 1, the bracket 1 is fixedly connected to a contact network column 6 on the side of a track 7 and has a height difference with the ground, a horizontal calibration gyroscope is installed on the laser transmitter 2, so that the laser transmitter 2 emits a laser beam in a horizontal direction, and the laser receiver 3 is fixed to the top of the lifting rod 4 and faces the laser transmitter 2 for receiving the laser beam emitted by the laser transmitter 2;

[0042] The lifting rod 4 includes a fixed rod 41 and a movable rod 42 whose bottom end is sleeved in the fixed rod 41. The fixed rod 41 and the movable rod 42 are locked and connected by a locking bolt. A row of scales 43 extending vertically downward is provided on the movable rod 42. The scale line corresponding to the zero scale value is located at the top of the scale 43. When the length of the lifting rod 4 is the shortest, the scale line corresponding to the zero scale value on the movable rod 42 is at the same horizontal height as the top of the fixed rod 41.

[0043] The laser receiver 3 includes a single chip microcomputer 31, a plurality of photodiodes 32, a scale display screen 33 and a wireless signal transmitter 34 respectively connected to the single chip microcomputer 31; the plurality of photodiodes 32 are arranged vertically in a row, and a vertically extending electronic scale is displayed on the scale display screen 33. The center height of the electronic scale is zero scale, the minimum scale value below zero scale is -5cm, the maximum scale value above zero scale is 5cm, and the height difference between adjacent scale lines is 1-2mm. Among the plurality of photodiodes 32, the photodiode 32 located at the center height corresponds to the zero scale on the electronic scale, and the spacing between adjacent photodiodes 32 is 1-2mm, that is, the height of each photodiode 32 is set to correspond to the height of one of the scale lines on the electronic scale, and the single chip microcomputer 31 is wirelessly connected to the handheld terminal display 5 through the wireless signal transmitter 34;

[0044] The handheld terminal display 5 includes a microcontroller 51, a touch screen 52, a wireless signal receiving device 53, a voice warning device 54 and a memory 55 respectively connected to the microcontroller 51, and the wireless signal transmitting device 34 of the laser receiver 3 is wirelessly connected to the wireless signal receiving device 53 of the handheld terminal display 5; wherein the voice warning device 54 includes three types of buzzers, which are an upward buzzer warning device, a zero-level buzzer warning device and a downward buzzer warning device.

[0045] A track elevation control method for capacity expansion and reconstruction of railway operating lines specifically includes the following methods:

[0046] (1) First, the bracket 1 is fixedly connected to the contact network column 6 on the side of the track 7 with a height difference from the ground, and the laser transmitter 2 is installed on the bracket 1. The lifting rod 4 is vertically placed on the track surface with a known elevation or a known level point. The known elevation of the track surface or the known level point is H. 已知, the laser receiver 3 on the lifting rod 4 faces the laser transmitter 2 for receiving the laser beam emitted by the laser transmitter 2. The operator holds the handheld terminal display 5 and checks the touch screen 52 of the handheld terminal display 5 to obtain the horizontal height of the laser receiver 3 receiving the laser beam, and then adjusts the horizontal height of the laser receiver 3 on the lifting rod 4. When the zero level arrow on the touch screen 52 flashes and the zero level buzzer warning device continues to sound, tighten the locking bolt of the lifting rod 4. At this time, the height value of the lifting rod 4 is A, and the elevation corresponding to the height value A is the laser line elevation H 激 , H 激 =A+

[0047] H 已知 ;

[0048] (2) The lifting rod 4 is vertically placed at any position on the rail surface (the top surface of the rail 7) where the elevation is to be determined. The laser receiver 3 on the lifting rod 4 faces the laser transmitter 2 to receive the laser beam emitted by the laser transmitter 2. The operator holds the handheld terminal display 5 and adjusts the horizontal height of the laser receiver 3 on the lifting rod 4. When the zero level arrow on the touch display screen 52 flashes and the zero level buzzer warning continues to sound, the locking bolt of the lifting rod 4 is tightened. At this time, the rod height value B of the lifting rod 4 corresponds to the actual elevation value H of the rail surface at the position where the elevation is to be determined. 实 , that is, H 实 =H 激 -B=A+H 已知 -B;

[0049] (3) The memory 55 of the handheld terminal display 5 stores the vertical curve radius R of the vertical curve section of the track, the front slope value i1 and the rear slope value i2 at the slope change point, and the mileage value K at the slope change point of the vertical curve section of the track. M and the design elevation value H of the rail surface M The microcontroller 51 of the handheld terminal display 5 calculates the design elevation value of the track surface at any position of the vertical curve section of the track, and the specific steps are:

[0050] S31. Calculate the length L and tangent length T of the vertical curve section of the track, as shown in the following formulas (1) and (2):

[0051] L = R × |i1-i2| (1);

[0052] T = L / 2 (2);

[0053] S32, calculate the starting mileage value K of the vertical curve section of the track ZY and the terminal mileage value K YZ , see the following formula (3) and formula (4) for details:

[0054] K ZY =KM -L / 2 (3);

[0055] K YZ =K M +L / 2 (4);

[0056] S33. When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the front slope of the slope change point of the vertical curve section of the track, the following formula (5) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the back slope of the slope change point of the vertical curve section of the track, the following formula (6) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 :

[0057] H 设 =H M ±(K M -K 待 )×|i1|±(K 待 -K ZY ) 2 / 2R (5);

[0058] H 设 =H M ±(K 待 -K M )×|i2|±(K YZ -K 待 ) 2 / 2R (6);

[0059] When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (5) and (6) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +;

[0060] In formula (5) and formula (6), K 待 It is the mileage value corresponding to any position of the vertical curve section of the track;

[0061] S34. When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located in front of the vertical curve section of the track, the following formula (7) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located behind the vertical curve section of the track, the following formula (8) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 ;

[0062] H 设 =H M ±(K M -K待 )×|i1| (7);

[0063] H 设 =H M ±(K 待 -K M )×|i2| (8);

[0064] When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (7) and (8) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +;

[0065] (4) Place the lifting rod 4 vertically on the rail surface at any position of the required elevation, adjust the height of the lifting rod 4, and when the zero level arrow on the touch display screen 52 flashes and the zero level buzzer alarm continues to sound, tighten the locking bolt of the lifting rod 4, record the height value B at this time, and record the height value B and the current position mileage K. 待 The data is input into the handheld terminal display 5 through the touch screen 52, and the microcontroller 51 of the handheld terminal display 5 will automatically calculate the design elevation value H of the rail surface at the current position. 设 and the actual elevation value H 实 , and automatically perform difference calculation to obtain the elevation adjustment amount of the rail surface at this position of the vertical curve section of the track, and then display the elevation adjustment value and elevation adjustment direction on the touch screen 52 of the handheld terminal display 5, so that the staff can check and make corresponding elevation control adjustments. At the same time, the memory 55 records the elevation adjustment amount of the rail surface at this position of the vertical curve section of the track.

[0066] In steps (1) and (2), when the horizontal height of the laser receiver 3 on the lifting rod 4 is adjusted, when any photodiode 32 of the laser receiver 3 receives a photoelectric beam, the single-chip microcomputer 31 of the laser receiver 3 receives a signal corresponding to the photodiode 32, and then confirms the scale value of the electronic scale corresponding to the photodiode 32. The single-chip microcomputer 31 of the laser receiver 3 wirelessly sends the scale value to the handheld terminal display 5 through the wireless signal transmitter 34. The microcontroller 51 of the handheld terminal display 5 receives the scale value information through the wireless signal receiver 53, and then according to the scale value information, The arrow for adjusting the upward direction or the downward direction on the touch display screen 52 is lit, and the adjustment value is displayed and the corresponding upward adjustment buzzer alarm or downward adjustment buzzer alarm is controlled to keep sounding. The staff adjusts the height of the lifting rod 4 according to the adjustment value and arrow direction on the touch display screen 52. After the lifting rod 4 is adjusted into place, the photodiode 32 corresponding to the zero scale value on the electronic scale receives the light signal, so that the zero level arrow on the touch display screen 52 of the handheld terminal display 5 is lit, and the zero level buzzer alarm keeps sounding, and the horizontal height of the laser receiver 3 on the lifting rod 4 is adjusted.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A track elevation control system used for capacity expansion and reconstruction of railway operating lines, characterized by: It includes a laser transmitter, a laser receiver, a lifting rod and a handheld terminal display. The laser transmitter is fixed on the side of the track and has a height difference with the ground. The laser receiver is fixed on the top of the lifting rod and faces the laser transmitter to receive the laser beam emitted by the laser transmitter. The handheld terminal display is wirelessly connected to the laser receiver.

2. The track elevation control system for capacity expansion and reconstruction of railway operating lines according to claim 1 is characterized in that: The laser transmitter is installed on a bracket, and a horizontal calibration gyroscope is installed on the laser transmitter.

3. The track elevation control system for capacity expansion and reconstruction of railway operating lines according to claim 1 is characterized in that: The laser receiver includes a single chip microcomputer, a plurality of photodiodes, a scale display screen and a wireless signal transmitter respectively connected to the single chip microcomputer; the plurality of photodiodes are arranged vertically in a row, and a vertically extending electronic scale is displayed on the scale display screen, the center height of the electronic scale is zero scale, the minimum scale value below zero scale is -5cm, the maximum scale value above zero scale is 5cm, and the height difference between adjacent scale lines is 1-2mm. Among the plurality of photodiodes, the photodiode located at the center height corresponds to the zero scale on the electronic scale, and the spacing between adjacent photodiodes is 1-2mm, so that the height of each photodiode setting corresponds to the height of one of the scale lines on the electronic scale, and the single chip microcomputer is wirelessly connected to the handheld terminal display through the wireless signal transmitter.

4. The track elevation control system for capacity expansion and reconstruction of railway operating lines according to claim 3 is characterized in that: The lifting rod includes a fixed rod and a movable rod with the bottom sleeved in the fixed rod. The fixed rod and the movable rod are locked and connected by a locking bolt. A row of scales extending vertically downward is provided on the movable rod. The scale line corresponding to the zero scale value is located at the top of the scale. When the length of the lifting rod is the shortest, the scale line corresponding to the zero scale value on the movable rod is at the same horizontal height as the top of the fixed rod.

5. The track elevation control system for capacity expansion and reconstruction of railway operating lines according to claim 3 is characterized in that: The handheld terminal display includes a microcontroller, a touch screen, a wireless signal receiver, a voice warning device and a memory respectively connected to the microcontroller; the wireless signal transmitter of the laser receiver is wirelessly connected to the wireless signal receiver of the handheld terminal display.

6. The track elevation control system for capacity expansion and reconstruction of railway operating lines according to claim 5 is characterized in that: The voice warning device comprises three types of buzzers, which are an upward buzzer warning device, a zero-level buzzer warning device and a downward buzzer warning device.

7. A track elevation control method for capacity expansion and reconstruction of railway operating lines, characterized in that: The specific methods include the following: (1) First, fix the bracket to the contact network column on the side of the track with a height difference from the ground, and install the laser transmitter on the bracket. The lifting rod is vertically placed on the track surface or a known leveling point with a known elevation. The known elevation of the track surface or the known leveling point is H. 已知 The laser receiver on the lifting rod faces the laser transmitter to receive the laser beam emitted by the laser transmitter. The operator holds the handheld terminal display and checks the touch screen of the handheld terminal display to obtain the horizontal height of the laser receiver receiving the laser beam. Then, the horizontal height of the laser receiver on the lifting rod is adjusted. When the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, the locking bolt of the lifting rod is tightened. At this time, the height value of the lifting rod is A, and the elevation corresponding to the height value A is the laser line elevation H. 激 , H 激 =A+H 已知 ; (2) Place the lifting rod vertically at any position on the rail surface where the elevation is to be determined. The laser receiver on the lifting rod faces the laser transmitter to receive the laser beam emitted by the laser transmitter. The operator holds the handheld terminal display and adjusts the horizontal height of the laser receiver on the lifting rod. When the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, tighten the locking bolt of the lifting rod. At this time, the rod height value B of the lifting rod corresponds to the actual elevation value H of the rail surface at the position where the elevation is to be determined. 实 , that is, H 实 =H 激 -B=A+H 已知 -B; (3) The memory of the handheld terminal display stores the vertical curve radius R of the vertical curve section of the track, the front slope value i1 and the rear slope value i2 at the slope change point, and the mileage value K at the slope change point of the vertical curve section of the track. M and the design elevation value H of the rail surface M , the microcontroller of the handheld terminal display calculates the design elevation value of the track surface at any position of the vertical curve section of the track. The specific steps are: S31. Calculate the length L and tangent length T of the vertical curve section of the track, as shown in the following formulas (1) and (2): L = R × |i1-i2| (1); T = L / 2 (2); S32, calculate the starting mileage value K of the vertical curve section of the track ZY and the terminal mileage value K YZ , see the following formula (3) and formula (4) for details: K ZY =K M -L / 2 (3); K YZ =K M +L / 2 (4); S33. When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the front slope of the slope change point of the vertical curve section of the track, the following formula (5) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 When any position of the vertical curve section of the track is within the mileage range of the vertical curve section of the track and is located on the back slope of the slope change point of the vertical curve section of the track, the following formula (6) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 : H 设 =H M ±(K M -K 待 )×|i1|±(K 待 -K ZY ) 2 / 2R (5); H 设 =H M ±(K 待 -K M )×|i2|±(K Yz -K 待 ) 2 / 2R (6); When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (5) and (6) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +; In formula (5) and formula (6), K 待 It is the mileage value corresponding to any position of the vertical curve section of the track; S34. When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located in front of the vertical curve section of the track, the following formula (7) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 When any position of the vertical curve section of the track is outside the mileage range of the vertical curve section of the track and is located behind the vertical curve section of the track, the following formula (8) is used to calculate the design elevation value H of the track surface at any position of the vertical curve section of the track: 设 ; H 设 =H M ±(K M -K 待 )×|i1| (7); H 设 =H M ±(K 待 -K M 0×|i2| (8); When the vertical curve segment is a convex vertical curve segment, the ± signs in equations (7) and (8) are both -, and when the vertical curve segment is a concave vertical curve segment, the ± signs are both +; (4) Place the lifting rod vertically on the rail surface at any position where the required elevation is to be found, adjust the height of the lifting rod, and when the zero level arrow on the touch screen flashes and the zero level buzzer alarm continues to sound, tighten the locking bolt of the lifting rod and record the height value B at this time. 待 The touch screen is input into the handheld terminal display, and the microcontroller of the handheld terminal display will automatically calculate the design elevation value H of the rail surface at the current position. 设 and the actual elevation value H 实 , and automatically perform difference calculation to obtain the elevation adjustment amount of the track surface at this position of the vertical curve section of the track. Then the elevation adjustment value and elevation adjustment direction are displayed on the touch screen of the handheld terminal display, which is convenient for the staff to check and make corresponding elevation control adjustments. At the same time, the memory records the elevation adjustment amount of the track surface at this position of the vertical curve section of the track.

8. The track elevation control method according to claim 7, characterized in that: When adjusting the horizontal height of the laser receiver on the lifting rod, when any photodiode of the laser receiver receives a photoelectric beam, the single chip microcomputer of the laser receiver receives a signal from the corresponding photodiode, and then confirms the scale value of the electronic scale corresponding to this photodiode. The single chip microcomputer of the laser receiver wirelessly sends the scale value to the handheld terminal display through a wireless signal transmitter, and the microcontroller of the handheld terminal display receives the scale value information through the wireless signal receiver. Then, according to the scale value information, the arrow for adjusting the upward direction or the downward direction on the touch screen is lit, and the adjustment value is displayed and the corresponding upward buzzer warning device or downward buzzer warning device is controlled to continue to beep. The staff adjusts the height of the lifting rod according to the adjustment value and arrow direction on the touch screen. After the lifting rod is adjusted into place, the photodiode corresponding to the zero scale value on the electronic scale receives the light signal, so that the zero level arrow on the touch screen of the handheld terminal display is lit, and the zero level buzzer warning device continues to beep, and the horizontal height of the laser receiver on the lifting rod is adjusted.

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