Coaxial measurement system and method for accurate measurement and fine tamping control network of electrified ordinary-speed railway

Abstract

The invention discloses a coaxial measurement system and method for a fine measurement and fine tamping control network of an electrified ordinary-speed railway, and the system comprises a measurement device disposed on a contact network, the measurement device comprises an L-shaped hoop assembly and a detection assembly, and the detection assembly is disposed on the L-shaped hoop assembly; the L-shaped hoop assembly comprises a first hoop piece and a second hoop piece, wherein the first hoop piece is of an L-shaped structure; the second hoop piece is of an L-shaped structure matched with the first hoop piece, and kidney-shaped holes are formed in the first hoop piece and the second hoop piece; one end of the fixing bolt penetrates through the kidney-shaped holes of the first hoop piece and the second hoop piece and then is connected with a fixing nut through threads. According to the invention, the GNSS receiver antenna and the prism insertion rod are used, so that high precision in measurement of a second-level GNSS control network and a third-level orbit control network is ensured; meanwhile, due to the adoption of the unified measuring device, the time for replacing and adjusting the equipment is shortened, and the measuring efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering control network measurement, and in particular to a coaxial measurement system and method for a precise measurement and tamping control network of an electrified conventional speed railway. Background Art

[0002] The control network serving the precision measurement and tamping of conventional railways is composed of two parts: one is the section GNSS control network, and the other is the fixed pile control network in the station throat area; the fixed pile control network in the station throat area is laid out in three levels, the first level is the station GNSS benchmark control network, the second level is the secondary GNSS control network in the station throat area, and the third level is the fixed pile track control network in the station throat area. The first and second levels use GNSS measurement, and the third level uses total station free station corner intersection measurement. The second level measurement requires joint measurement of the first level GNSS benchmark control network, and similarly, the third level measurement requires joint measurement of the second level GNSS control network.

[0003] Since the secondary GNSS control network is generally surveyed and laid out using GNSS technology, and the tertiary track control network is mainly surveyed and laid out using total stations, it is necessary to replace the measuring points from GNSS receivers with measuring prisms when completing the measurement of the secondary GNSS control network. The traditional technology is to dig a pit on the railway shoulder to bury the control points and set up a tripod, and install a centering base on the tripod to ensure that the phase center plane position of the GNSS receiver is consistent with the axis of the prism. Due to the uncertainty of the cables under the railway shoulder, it is necessary to investigate the position of the cables under the roadbed in advance to ensure the safety of burying the secondary GNSS control points, including the safety of the operator and the operation of the railway. Therefore, the implementation plan of burying secondary GNSS points on the shoulder has been gradually abandoned due to its major drawbacks, and it is changed to bury the points by clamping on the electrified contact network pillars. However, since the tripod cannot be set up at the points buried by clamping, a coaxial measurement system and method for the precise measurement and tamping control network of electrified conventional railways is urgently needed to solve the actual measurement problems.

[0004] After searching, the application scheme of Chinese patent application No. 202320268196.7 discloses a level measuring rod for rail control network measurement, including a mounting frame, a connecting block is fixed at the lower end of the mounting frame, the lower end of the connecting block is rotatably connected to a support rod, a cone rod is fixed at the lower end of the support rod, a threaded rod is arranged at the lower part of the support rod, a protective mechanism for protecting the cone rod is installed at the lower part of the support rod, the upper part of the protective frame is threadedly connected to the threaded rod, a wiping brush is fixed to the inner lower part of the protective frame, and the protective frame is fixedly connected to the support rod by a fastening bolt. The measuring rod in the above patent has the following shortcomings: the measurement is relatively limited, and it cannot be applied to the situation where a tripod cannot be set up at the point to be measured. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a coaxial measurement system and method for the precise measurement and tamping control network of electrified conventional railways.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A coaxial measurement system for precise measurement and tamping control network of electrified conventional railway, comprising a measurement device installed on the contact network, the measurement device comprising an L-shaped clamp assembly and a detection assembly, and the detection assembly is installed on the L-shaped clamp assembly;

[0008] The L-shaped clamp assembly comprises:

[0009] A first hoop member, the first hoop member is in an L-shaped structure;

[0010] A second hoop member, the second hoop member is in an L-shaped structure adapted to the first hoop member, and waist-shaped holes are provided on the first hoop member and the second hoop member;

[0011] A fixing bolt, one end of which passes through the waist-shaped holes of the first hoop member and the second hoop member and is connected to a fixing nut through a thread, a flat washer is arranged between the fixing nut and the second hoop member, and an elastic washer is arranged between the flat washer and the fixing nut;

[0012] The detection component comprises:

[0013] An L-shaped connecting rod, the shape of which matches the L-shaped clamp assembly, the L-shaped connecting rod is installed in a socket on the L-shaped clamp assembly, the bottom end of the GNSS plug rod matches the slot, and a GNSS receiver antenna is installed on the top of the GNSS plug rod;

[0014] The prism rod has a bottom end that is matched with the slot and a prism is arranged on the top end of the prism rod.

[0015] Preferably, the specific construction method of the L-shaped clamp assembly is:

[0016] ① Investigate the structural form of the station contact network and design the installation method of the L-shaped clamp assembly according to the structural form of the contact network;

[0017] ②The L-shaped clamp assembly is made of 304 stainless steel plate, the fixing bolts are 304 hexagonal stainless steel bolts, the fixing nuts are 304 anti-slip stainless steel nuts, and the elastic pads are made of anti-aging 2mm thick rubber pads;

[0018] ③When installing the L-shaped clamp assembly, use epoxy resin glue to bond it to the contact network pole;

[0019] ④The jack of the L-shaped clamp assembly is made of 304 stainless steel pipe, with a length and width processing accuracy of ±0.5mm and a length processing accuracy of ±5mm. The jack is tightly welded to the stainless steel parts of the L-shaped clamp assembly, and the steel pipe is welded at a perpendicular angle to the vertical surface of the clamp with an accuracy of ±5 degrees.

[0020] Preferably, the installation points of the L-shaped clamp assembly include:

[0021] ① During installation, check the appearance of the clamp, whether the 2mm thick non-slip rubber pad pasted with universal glue on the inner wall of the clamp is stable, and whether there is any desoldering problem at the welding part;

[0022] ②Measure and mark the installation position of the clamp on the contact network pole, and install it at a height of 30cm to 50cm from the rail surface;

[0023] ③ Apply epoxy resin glue on the inner wall of the clamp, and stick the clamp on the contact network pole, put in 4mm~10mm spacer rubber pads, install bolts, washers, anti-slip nuts and tighten them;

[0024] ④ When tightening the fixing bolts, apply pre-tightening force alternately and symmetrically on both sides to prevent asymmetric tightening from causing some bolts to fail to fully exert their effectiveness and reduce the friction between the clamp and the contact network pole.

[0025] Preferably, the construction of the L-shaped connecting rod specifically includes:

[0026] The L-shaped connecting rod includes a long branch and a short branch. When inserted, the long branch is in a horizontal state and the short branch is in a numerical state.

[0027] The long branch of the L-shaped connecting rod is made of stainless steel, and the angle between the short branch and the long branch is 90 degrees;

[0028] A straight-insert socket is reserved on the short branch of the L-shaped connecting rod, and the socket is round;

[0029] The length of the GNSS rod on the upper part of the L-shaped connecting rod is designed according to different GNSS receiver models to ensure that the distance between the phase center of the GNSS receiver and the top of the short branch is 150mm. Similarly, the distance between the prism center of the prism rod and the top of the L-shaped connecting rod during the measurement of the station area track control network is also 150mm.

[0030] Preferably: the first level of the control network is the station GNSS reference control network, the second level is the station throat area secondary GNSS control network, and the third level is the station throat area fixed pile track control network. The first and second levels are measured using GNSS, and the third level uses total station free station corner intersection measurement; when the coaxial measurement system is measuring, it specifically includes the following steps:

[0031] S1: Install the L-shaped clamp assembly on the contact network;

[0032] S2: Install the L-shaped connecting rod on the L-shaped clamp assembly;

[0033] S3: Install the GNSS plug rod of the GNSS receiver antenna on the L-shaped connecting rod;

[0034] S4: Perform the first and second level tests in sequence;

[0035] S5: Remove the GNSS plug rod of the GNSS receiver antenna from the L-shaped connecting rod;

[0036] S6: Install the prism rod of the prism at the same position of the L-shaped connecting rod;

[0037] S7: Conduct the third level test.

[0038] Preferably, the measurement of the control network includes:

[0039] GNSS control network plane measurement;

[0040] GNSS control network height measurement;

[0041] Survey and installation of reflector fixing piles;

[0042] The plane measurement of the GNSS control network adopts the satellite positioning observation method and is carried out in accordance with the accuracy requirements of the second-class GNSS control points for railways. The network is laid out using the expansion method of the geodetic quadrilateral synchronous ring graphic, and adjacent synchronous rings are connected by edges. Each synchronous ring is composed of at least 4 measuring stations, and each ring synchronously observes for 2 time periods, with each period observing for more than 90 minutes.

[0043] Preferably, the measurement process of the GNSS control network plane measurement is carried out according to the following steps:

[0044] S11: The optical plummet on the base must be checked and calibrated before operation, and the centering error should not exceed 1mm;

[0045] S12: The antenna height is measured using a special height-measuring curved ruler. The antenna height is measured once before and after each period. The difference between the antenna height readings before and after the measurement should not exceed 2mm, otherwise the period will be invalidated.

[0046] S13: After the receiver starts working, record the station number and antenna height information in time; during the observation process, observe the satellite changes, received signal quality, memory remaining and battery remaining;

[0047] S14: When observing two periods, the instrument must be re-set up after the first period is completed, and re-centered and leveled before observing the next period;

[0048] S15: During the operation, satellite visibility and accuracy forecasts are carried out according to the project location, and the observation period of the obstacle map is selected and arranged in combination with the point location;

[0049] S16: After arriving at the measuring station, first check whether the point number is correct. After it is correct, install the receiver, center and level it, and prepare for startup. When using GNSS measurement, use a walkie-talkie at least 10m away from the antenna.

[0050] S17: After the observation, collect the observation data of the day and perform data processing and analysis, check the technical accuracy of the observation data quality, baseline solution accuracy, poor repeated baseline, poor loop closure, etc., and determine the work tasks and observation period arrangements based on the inspection results.

[0051] Preferably: the error in the baseline length between adjacent points in the plane measurement of the GNSS control network is calculated as follows;

[0052]

[0053] Where:

[0054] σ: mean error of baseline length (mm);

[0055] a: fixed error (mm);

[0056] b: proportional error coefficient (mm / km);

[0057] d: average side length of the baseline or ring (km).

[0058] Preferably, when the GNSS control network plane measurement is performed for data processing, it specifically includes:

[0059] Data preprocessing → baseline processing → starting point and coordinate frame → baseline solution → baseline verification → 3D network adjustment → establishment of independent engineering coordinate system and calculation;

[0060] The baseline check specifically includes:

[0061] S21: Repeatable baseline; the repeatability of the vector in each time period reflects the internal accuracy of the baseline solution and is an important indicator for measuring the quality of the baseline solution; it is defined as:

[0062]

[0063] Where: are the components of the solution baseline at each time period, is the covariance of the corresponding components, is the weighted average of the corresponding baseline components, for the corresponding repeatability;

[0064] Repeatability is expressed in two parts: fixed error and proportional error, namely:

[0065]

[0066] Where: is the mean error of the component, is the fixed error of the component, is the relative error, is the length of the component; the baseline is repeated statistically to obtain the baseline vector repeatability;

[0067] S22: Synchronous loop closure error; for the synchronous loop check of the GAMIT software baseline solution, the nrms value of the solution is used as an indicator of the quality of the synchronous loop, and the nrms value cannot be greater than 0.5.

[0068] Preferably, the control network coaxial measurement system uses a distance measurement marking device when performing distance measurement marking along the direction of the rail, and the distance measurement marking device includes:

[0069] A car body, wherein wheels are arranged at the bottom of the car body, and the distance between the wheels on both sides is greater than the width of two rails;

[0070] A lifting platform, a hydraulic cylinder is installed on the vehicle body, the output end of the hydraulic cylinder is fixed on the lifting platform, a track wheel adapted to the rail is installed at the bottom of the lifting platform, and a driving mechanism for driving the track wheel to move is arranged inside the lifting platform;

[0071] A feeding mechanism, the feeding mechanism is used for supplying marking materials;

[0072] The marking mechanism is installed on the vehicle body and is used to output the marking material at equal intervals, thereby realizing distance measurement and marking;

[0073] The marking mechanism comprises:

[0074] A rotating frame, a mounting frame is mounted on the vehicle body, the rotating frame is rotatably mounted on the mounting frame, and a driving part for driving the rotating frame to rotate is arranged in the annular frame;

[0075] An annular frame, the center of which coincides with the rotation center of the rotating frame, and the annular frame is connected to the rotating frame via a connecting rod;

[0076] A plurality of accommodating cavities are equidistantly arranged on the annular frame and are circumferentially distributed;

[0077] An annular elastic connection part, which is arranged at the output end of the accommodating cavity, and is provided with circumferentially distributed baffles, and the plurality of baffles are supported by the annular elastic connection part to achieve blocking of the output end of the accommodating cavity;

[0078] A pushing part, which is arranged on the inner side of the annular frame and is used to push the marking material out of the containing cavity;

[0079] The push unit comprises:

[0080] A push rod, the push rod is slidably connected to the inner wall of the accommodating cavity at one end away from the baffle;

[0081] A push frame, the push frame is fixed to one end of the push rod located in the accommodating cavity;

[0082] An extrusion frame is installed on the side of the vehicle body, a convex plate is provided on the extrusion frame, the extrusion frame is located on the moving path of the ejector rod, and the bottom surface of the extrusion frame is farthest from the center of the annular frame;

[0083] The feeding mechanism comprises:

[0084] A material tank is installed on the vehicle body through a support frame, and a feeding port is provided on the material tank;

[0085] The mounting seat is arranged directly above the annular frame, and an output nozzle is installed in the mounting seat, and one end of the output nozzle is connected to the output end of the material tank through a delivery pipe; a delivery pump for delivery is arranged on the delivery pipe, and the delivery pump is installed on the vehicle body through a fixing frame;

[0086] The annular plate is installed on the inner side of the mounting seat, and an electromagnet is arranged at the bottom of the annular plate, and the electromagnet is used to attract the baffle.

[0087] The beneficial effects of the present invention are:

[0088] 1. The present invention ensures high precision in the measurement of the secondary GNSS control network and the tertiary track control network by using the GNSS receiver antenna and the prism rod; at the same time, due to the use of a unified measuring device, the time for equipment replacement and adjustment is reduced, and the measurement efficiency is improved.

[0089] 2. The present invention adopts an L-shaped clamp assembly installed on the contact network, avoiding the traditional practice of digging pits on the railway shoulder to bury control points, reducing the impact on railway operation safety, and also reducing labor intensity and construction risks; there is no need to set up a supporting structure on the ground, so it can be quickly and conveniently built and used under different terrain and environmental conditions, and has strong environmental adaptability.

[0090] 3. The measurement method provided by the present invention includes detailed data processing steps, which ensures the accuracy and efficiency of data processing and provides reliable data support for subsequent analysis and decision-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 This is an installation effect diagram of a coaxial measurement system for precise measurement and tamping control network of electrified conventional railways proposed by the present invention;

[0092] Figure 2A measurement schematic diagram of a coaxial measurement system for precise measurement and tamping control network of electrified conventional railway proposed by the present invention when a GNSS receiver antenna is installed;

[0093] Figure 3 A schematic diagram of the measurement of a prism installed in a coaxial measurement system of a precise measurement and tamping control network for electrified conventional railways proposed by the present invention;

[0094] Figure 4 A cross-sectional view of an L-shaped connecting rod and a first plug-in rod in a plug-in state of a coaxial measurement system of a precision measurement and tamping control network for electrified conventional railways proposed by the present invention;

[0095] Figure 5 A schematic structural diagram of an L-shaped clamp assembly of a coaxial measurement system for a precise measurement and tamping control network of an electrified conventional railway proposed by the present invention;

[0096] Figure 6 This is a schematic diagram of the GNSS measurement side-link structure of a coaxial measurement system for precise measurement and tamping control network of electrified conventional railways proposed by the present invention;

[0097] Figure 7 This is a flow chart of a coaxial measurement method for precise measurement and tamping control network of electrified conventional railway proposed by the present invention;

[0098] Figure 8 A schematic diagram of the structure of a distance measuring marking device of a coaxial measurement system of a precise measurement and tamping control network for electrified conventional railways proposed by the present invention;

[0099] Fig. 9 This is a structural schematic diagram of another angle of a distance measuring marking device of a coaxial measurement system of a precise measurement and tamping control network for electrified conventional railways proposed by the present invention;

[0100] Fig.10 A schematic diagram of the structure of a lifting platform of a distance measuring marking device of a coaxial measuring system of a precise measuring and tamping control network for electrified conventional railways proposed by the present invention;

[0101] Fig.11 A schematic structural diagram of a ring frame of a distance measuring marking device of a coaxial measurement system of a precise measurement and tamping control network for electrified conventional railways proposed by the present invention;

[0102] Fig.12 This is a structural schematic diagram of a mounting seat and a sectional view of a distance measuring marking device of a coaxial measurement system of a precision measurement and tamping control network for electrified conventional speed railways proposed by the present invention.

[0103] In the figure:

[0104] 1-L-shaped clamp assembly, 2-contact network, 3-rail, 4-ballast, 5-shoulder, 6-L-shaped connecting rod, 7-GNSS plug rod, 8-GNSS receiver antenna, 9-prism plug rod, 10-prism, 11-first clamp, 12-second clamp, 13-fixing nut, 14-elastic pad, 15-flat pad, 16-waist hole, 17-fixing bolt, 18-car body, 19-ring frame, 20-support frame, 21-feeding port, 22 - material tank, 23 - mounting seat, 24 - wheel, 25 - extrusion frame, 26 - hydraulic cylinder, 27 - lifting platform, 28 - track wheel, 29 - rotating frame, 30 - conveying pipe, 31 - conveying pump, 32 - fixing frame, 33 - mounting frame, 34 - push rod, 35 - connecting rod, 36 - accommodating chamber, 37 - convex plate, 38 - baffle, 39 - spring, 40 - annular plate, 41 - electromagnet, 42 - output nozzle, 43 - push frame, 44 - annular elastic connecting part. DETAILED DESCRIPTION

[0105] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0106] Embodiment 1:

[0107] A coaxial measurement system for precise measurement and tamping control network of electrified conventional railway, comprising a measurement device installed on a contact network 2, the measurement device comprising an L-shaped clamp assembly 1 and a detection assembly, the detection assembly being installed on the L-shaped clamp assembly 1; the contact network 2 is located on one side of a shoulder 5 of a ballast 4, and a rail 3 is arranged on the ballast 4; the measurement device is more suitable for such a situation where it is not suitable to set up a tripod;

[0108] The L-shaped clamp assembly 1 comprises:

[0109] A first hoop member 11, the first hoop member 11 is in an L-shaped structure;

[0110] A second hoop member 12, the second hoop member 12 is in an L-shaped structure adapted to the first hoop member 11, and waist-shaped holes 16 are formed on the first hoop member 11 and the second hoop member 12;

[0111] A fixing bolt 17, one end of which passes through the waist-shaped hole 16 of the first hoop member 11 and the second hoop member 12 and is connected to the fixing nut 13 by threading, a flat washer 15 is arranged between the fixing nut 13 and the second hoop member 12, and an elastic washer 14 is arranged between the flat washer 15 and the fixing nut 13;

[0112] The detection component comprises:

[0113] An L-shaped connecting rod 6, the shape of which is adapted to the L-shaped clamp assembly 1, the L-shaped connecting rod 6 is installed in a socket on the L-shaped clamp assembly 1, the bottom end of the GNSS plug rod 7 is adapted to the slot, and a GNSS receiver antenna 8 is installed on the top of the GNSS plug rod 7;

[0114] A prism rod 9, the bottom end of which is adapted to the slot, and a prism 10 is disposed on the top end of the prism rod 9;

[0115] By providing structures such as the L-shaped clamp assembly 1 and the detection assembly, it is possible to adapt well to the situation where a tripod cannot be set up at the test point, and the GNSS receiver antenna 8 and the prism 10 are detachably installed, which can make the measurement operation more convenient while realizing coaxial testing.

[0116] The specific construction method of the L-shaped clamp assembly 1 is as follows:

[0117] ① Investigate the structural form of the station contact network. Conventional contact networks are generally circular and square. Design the installation method of the L-shaped clamp assembly 1 according to the structural form of the contact network;

[0118] ② The L-shaped clamp assembly 1 is made of 304 stainless steel plate, the fixing bolt 17 is made of 304 hexagonal stainless steel bolt, the fixing nut 13 is made of 304 anti-slip stainless steel nut, and the elastic pad 14 is made of anti-aging 2mm thick rubber pad;

[0119] ③ The L-shaped clamp assembly 1 is bonded to the contact network pole with epoxy resin glue during installation, so it is stable and not easy to deform after installation;

[0120] ④The jack of the L-shaped clamp assembly 1 is made of 304 stainless steel pipe with an inner wall length of 2cm, a width of 1cm, a wall thickness of 4mm and a length of 50mm. The length and width processing accuracy is ±0.5mm, and the length processing accuracy is ±5mm. The jack is tightly welded to the stainless steel part of the L-shaped clamp assembly 1, and the steel pipe welding is welded at a perpendicular angle to the vertical surface of the clamp with an accuracy of ±5 degrees.

[0121] Among them, the installation points of the L-shaped clamp assembly 1 include:

[0122] ① During installation, check the appearance of the clamp, whether the 2mm thick non-slip rubber pad pasted with universal glue on the inner wall of the clamp is stable, and whether there is any desoldering at the welding part;

[0123] ②Measure and mark the installation position of the clamp on the contact network pole. It is usually installed at a height of 30cm to 50cm from the rail surface;

[0124] ③ Apply epoxy resin glue on the inner wall of the clamp, and stick the clamp to the contact network pole, put in 4mm~10mm spacer rubber pads, install bolts, washers, anti-slip nuts and tighten them.

[0125] ④ When tightening the fixing bolts 17, the pre-tightening force should be applied alternately and symmetrically on both sides to prevent asymmetric tightening from causing some bolts to fail to fully exert their effectiveness and reduce the friction between the clamp and the contact network pole.

[0126] The construction of the L-shaped connecting rod 6 specifically includes:

[0127] The L-shaped connecting rod 6 includes a long branch and a short branch. When inserted, the long branch is in a horizontal state and the short branch is in a numerical state.

[0128] The long branch of the L-shaped connecting rod 6 is made of 304 stainless steel with a length of 4 cm, a width of 2 cm, a length of 30 cm, and a wall thickness of 4 mm. The angle between the short branch and the long branch is about 90 degrees, the height of the short branch is 5 cm, the length and width of the long branch are processed within ±0.5 mm, the length of the long branch is processed within ±10 mm, and the height of the short branch is processed within ±10 mm.

[0129] A straight-insert socket is reserved on the short branch of the L-shaped connecting rod 6. The socket adopts a circular design, with an inner diameter of 14.01mm~14.025mm, a depth of 40mm, and a processing accuracy of ±0.5mm;

[0130] The length of the GNSS rod 7 on the upper part of the L-shaped connecting rod 6 needs to be designed according to different GNSS receiver models to ensure that the distance between the phase center of the GNSS receiver and the top of the short branch is 150mm. Taking Tianbao R4 as an example, the phase center~antenna base bottom published by Tianbao manufacturer is 64.9mm, so it is necessary to process a GNSS connecting rod of 85.1mm (150mm-64.9mm). Similarly, when measuring the station area track control network, the distance between the prism center of the prism rod 9 and the top of the L-shaped connecting rod 6 should also be 150mm.

[0131] The first level of the control network is the station GNSS reference control network, the second level is the station throat area secondary GNSS control network, and the third level is the station throat area fixed pile track control network. The first and second levels are measured using GNSS, and the third level uses total station free station corner intersection measurement. When the coaxial measurement system is measuring, it specifically includes the following steps:

[0132] S1: Install the L-shaped clamp assembly 1 on the contact network 2;

[0133] S2: Install the L-shaped connecting rod 6 on the L-shaped clamp assembly 1;

[0134] S3: Install the GNSS insertion rod 7 of the GNSS receiver antenna 8 on the L-shaped connecting rod 6;

[0135] S4: Perform the first and second level tests in sequence;

[0136] S5: Remove the GNSS insertion rod 7 of the GNSS receiver antenna 8 from the L-shaped connecting rod 6;

[0137] S6: Install the prism rod 9 of the prism 10 at the same position of the L-shaped connecting rod 6;

[0138] S7: Conduct the third level test.

[0139] The measurement of the control network includes:

[0140] GNSS control network plane measurement;

[0141] GNSS control network height measurement;

[0142] Survey and installation of reflector fixing piles;

[0143] Among them, the GNSS control network plane measurement adopts the satellite positioning observation method and is carried out in accordance with the second-class GNSS control point accuracy requirements for railways. The network is laid out using the geodetic quadrilateral synchronous ring graphic expansion method, and adjacent synchronous rings are connected by edges. Each synchronous ring consists of at least 4 measuring stations, and each ring synchronously observes 2 periods, with each period observing for more than 90 minutes;

[0144] GNSS network connection Figure 6 As shown, the measuring stations are arranged reasonably according to the distribution of on-site points;

[0145] During the measurement, please pay attention to the following matters:

[0146] (1) The optical plummet on the base must be checked and calibrated before operation, and the centering error should not exceed 1mm;

[0147] (2) The antenna height is measured using a special height measuring ruler. The antenna height is measured once before (before powering on) and after (after powering off) each time period. The difference between the antenna height readings before and after the measurement should not exceed 2 mm, otherwise the time period will be invalidated.

[0148] (3) After the receiver starts working, record the station number and antenna height information in time. During the observation process, observe the satellite changes, the quality of the received signal, the remaining memory and battery, etc. If any special situation occurs, report it in time and the team leader will decide how to deal with it.

[0149] (4) During the same observation period, the instrument shall not be shut down and restarted, the instrument parameter settings shall not be changed, and the antenna position shall not be rotated;

[0150] (5) If there is a power outage or satellite signal anomaly during the observation period, the observation period will be repeated; if there is a strong thunderstorm or storm during the observation period, the operation of the current observation period will be stopped immediately;

[0151] (6) When observing two periods, the instrument must be re-set up after the first period is completed, and the next period of observation must be conducted after re-centering and leveling;

[0152] (7) All the required operation items and record data at the measuring station must be completed, and the point position must be restored to its original state after inspection before the station can be moved;

[0153] (8) During the operation, satellite visibility and accuracy forecasts are carried out according to the project location, and the observation period of the obstacle map is selected and arranged in combination with the point location;

[0154] (9) GNSS operators should follow instructions and start the equipment synchronously. If the location cannot be reached as planned, the team leader should be notified and the team leader should adjust the observation period.

[0155] (10) After arriving at the measuring station, first check whether the point number is correct. After it is correct, install the receiver, align and level it, and prepare for startup;

[0156] (11) Observers are not allowed to leave the observation station without permission during operation. They should avoid touching or vibrating the instruments. They should also be careful to prevent pedestrians and other objects from approaching the antenna to block the satellite signal.

[0157] (12) Observers must ensure smooth communication and be equipped with mobile phones and walkie-talkies with sufficient power. When using walkie-talkies during GNSS measurements, they should be at least 10 meters away from the antenna.

[0158] (13) The observation data of the day must be backed up in a timely manner. No deletion or modification shall be made, and no operation instructions for reprocessing and reassembling the data shall be called. This work shall be completed by the team leader;

[0159] (14) After each day of observation, collect the observation data for the day and process and analyze the data, check the technical accuracy of the observation data, baseline solution accuracy, poor repeated baseline, loop closure error, etc., and determine the next day's work tasks and observation period arrangements based on the inspection results;

[0160] (15) The main technical requirements of the first-level GNSS control network should comply with the provisions of the following table:

[0161] Main technical requirements for the first-level GNSS control network

[0162]

[0163] GNSS measurement accuracy indicators

[0164] Note: When the baseline length is shorter than 500m, the error in the length of the two equal sides should be less than 5mm;

[0165] The mean error of the baseline length between adjacent points of the primary GNSS control network should be calculated as follows:

[0166]

[0167] Where σ: mean error of baseline length (mm);

[0168] a: fixed error (mm);

[0169] b: proportional error coefficient (mm / km);

[0170] d: average side length of the baseline or ring (km);

[0171] (16) The basic technical requirements for GNSS static observation of the primary GNSS control network shall comply with the provisions of the following table:

[0172] Technical requirements for field observations of the first-level GNSS control network

[0173]

[0174] When the GNSS control network plane measurement performs data processing, specifically:

[0175] (1) Data preprocessing;

[0176] Survey station name: Check the benchmark station number.

[0177] Antenna height: According to the requirements of GAMIT software, list and carefully check the measurement methods and antenna types for antenna height.

[0178] Conversion of RINEX format: According to the requirements of GAMIT software, the collected raw data shall be converted into RINEX format before data processing.

[0179] Data classification: Create a directory with the time period number, and copy the data of different stations in the same time period to the directory. Each station should have two files, one for observation data o file and the other for observation ephemeris n file. Create a directory with the time period number, and the directory name should preferably be six characters, such as YYDAYS, where YY is the last two digits of the year, DAY is the day of the year, and S is the time period number.

[0180] Download the selected global station data and final precise ephemeris or rapid precise ephemeris.

[0181] (2) Baseline processing;

[0182] The baseline processing software uses GAMIT V10.71 software developed jointly by the Massachusetts Institute of Technology and the Scripps Research Institute. When using precise ephemeris, the relative accuracy of the baseline solution can reach 10 -9 This software is generally used for CP0 baseline solution.

[0183] (3) Starting point and coordinate frame;

[0184] The starting basis is determined based on the starting point data collected on site, and the national A / B level points of the joint survey are used as the starting points.

[0185] (4) Baseline solution;

[0186] The baseline is calculated in synchronization periods. When solving each period, the following factors are mainly considered:

[0187] ① Model correction of satellite clock error (using the clock error parameters in the broadcast ephemeris);

[0188] ② Model correction of receiver clock error (using the clock error calculated based on pseudorange observations);

[0189] ③ The influence of ionospheric refraction is eliminated by using LC observations;

[0190] ④ Tropospheric refraction is corrected using the Saastamoinen model according to the standard atmospheric model, and the refraction deviation is estimated using the piecewise linear method;

[0191] ⑤ Satellite and receiver antenna phase center correction, the receiver antenna L1, L2 phase center deviation adopts the setting value of GAMIT software;

[0192] ⑥ Tidal correction of the station location;

[0193] ⑦ The cut-off altitude angle is 15 degrees and the epoch interval is 30 seconds;

[0194] ⑧Consider the satellite orbit error, that is, relax the IGS orbit.

[0195] (5) Baseline verification;

[0196] ① Repeat baseline;

[0197] The repeatability of the vectors in each time period reflects the internal accuracy of the baseline solution and is an important indicator for measuring the quality of the baseline solution. It is defined as:

[0198]

[0199] Where: are the components of the solution baseline at each time period, is the covariance of the corresponding components, is the weighted average of the corresponding baseline components, For the corresponding repeatability.

[0200] Repeatability can also be expressed in two parts: fixed error and proportional error, namely

[0201]

[0202] Where: is the mean error of the component, is the fixed error of the component, is the relative error, is the length of the component.

[0203] Count the repeated baselines to get the baseline vector repeatability.

[0204] ② Synchronous ring closure error;

[0205] Since GAMIT software uses multi-baseline solution (i.e., full combination solution), the synchronization loop closure error has been allocated during the baseline solution. For synchronization loop verification of GAMIT software baseline solution, the nrms value of the solution can be used as an indicator of the quality of the synchronization loop. Generally, the nrms value is required to be no greater than 0.5.

[0206] (6) 3D network adjustment

[0207] The network adjustment software used is CosaGPS developed by Wuhan University.

[0208] ① Three-dimensional unconstrained adjustment;

[0209] The purposes of three-dimensional unconstrained adjustment are mainly the following three aspects: first, to conduct gross error analysis to discover gross errors in observations and eliminate their influence; second, to adjust the covariance component factors of the observations to match the actual accuracy; third, to test and evaluate the internal accuracy of the overall network.

[0210] ② Three-dimensional constraint adjustment;

[0211] The purpose of the global constrained adjustment is to introduce an external benchmark, which takes all independent baseline vectors and their adjusted covariance matrices as observations. The adjustment can eliminate the systematic deviations of the scale and direction of the entire network caused by the transmission errors of the ephemeris and the network.

[0212] (7) Establish an independent engineering coordinate system and perform calculations;

[0213] Establish an independent coordinate system for the regional engineering project so that the Gaussian projection deformation and elevation projection deformation are no more than 25 mm / km, and calculate the coordinate conversion parameters between the CGCS2000 coordinate system of the survey area and the independent coordinate system of the project.

[0214] Among them, in the GNSS control network elevation measurement, after the control network solution is completed, the surface fitting method is used to calculate the conversion parameters in sections, and the calculated results are checked with the difference between the normal heights of the Beidou / GNSS points to determine the optimal elevation conversion parameters. The segment length is about 50km, that is, every 3 to 5 first-level GNSS reference points constitute a conversion section, providing 1 set of conversion parameters.

[0215] (1) Based on the primary GNSS benchmarks, additional points are added at intervals of about 5 to 7 km. The CGCS2000 results of the additional points are obtained through joint measurement with the primary GNSS benchmarks.

[0216] (2) The geodetic heights of the primary GNSS reference points and encrypted points are converted into normal heights by constructing a refined quasi-geoid model.

[0217] (3) Each conversion segment contains 7 to 9 conversion points (with known geodetic height and normal height). The surface equation is constructed through these 7 to 9 conversion points, and the conversion coefficient is solved. The equation is as follows:

[0218] N=f(B,L)=f1+f2*B+f3*L+f4*B^2+f5*L^2+f6*B*L

[0219] Where (B, L) is in radians; f1~f6 are the coefficients of the calculated quadratic polynomial;

[0220] (4) Perform quality inspection on the model, compare the height difference between the two points of the leveling route with the normal height calculated by the model, and the difference should meet the measurement requirements;

[0221] (5) The secondary GNSS control network and orbit data collection in the station area both use this model to convert geodetic height to normal height.

[0222] Embodiment 2:

[0223] A coaxial measurement system for precise measurement and precise tamping of a control network for an electrified conventional railway. This embodiment is based on the first embodiment. When the coaxial measurement system for the control network performs distance measurement marking along the direction of the rail 3, a distance measurement marking device is used. The distance measurement marking device includes:

[0224] A vehicle body 18, wherein wheels 24 are arranged at the bottom of the vehicle body 18, and the distance between the wheels 24 on both sides is greater than the width of the two rails 3;

[0225] A lifting platform 27, a hydraulic cylinder 26 is installed on the car body 18, the output end of the hydraulic cylinder 26 is fixed on the lifting platform 27, a track wheel 28 adapted to the rail 3 is installed at the bottom of the lifting platform 27, and a driving mechanism for driving the track wheel 28 to move is arranged in the lifting platform 27;

[0226] A feeding mechanism, the feeding mechanism is used for supplying marking materials;

[0227] The marking mechanism is mounted on the vehicle body 18 and is used to output the marking material at equal intervals, thereby realizing distance measurement and marking;

[0228] By setting up a distance measuring and marking device, the feeding mechanism and the marking mechanism can be used in coordination, and the marking time of the marking mechanism can be controlled according to the driving speed of the vehicle body 18, thereby realizing the measurement and marking operation. The wheel 24 and the track wheel 28 are arranged to cooperate, and the hydraulic cylinder 26 can be used to adjust the position of the track wheel 28 relative to the wheel 24, thereby facilitating driving in different scenarios.

[0229] Wherein, the marking mechanism comprises:

[0230] The rotating frame 29 is provided with a mounting frame 33 on the vehicle body 18, the rotating frame 29 is rotatably mounted on the mounting frame 33, and a driving part for driving the rotating frame 29 to rotate is provided in the annular frame 19;

[0231] The annular frame 19, the center of the annular frame 19 coincides with the rotation center of the rotating frame 29, and the annular frame 19 is connected to the rotating frame 29 via a connecting rod 35;

[0232] The accommodating chamber 36, a plurality of accommodating chambers 36 are equidistantly arranged on the annular frame 19 in a circumferentially distributed manner;

[0233] An annular elastic connection part 44, which is arranged at the output end of the accommodating cavity 36, and the annular elastic connection part 44 is provided with circumferentially distributed baffles 38, and the plurality of baffles 38 are supported by the annular elastic connection part 44 to achieve blocking of the output end of the accommodating cavity 36;

[0234] The pushing portion is arranged on the inner side of the annular frame 19 and is used to push the marking material out of the accommodating cavity 36 .

[0235] Wherein, the pushing unit comprises:

[0236] A push rod 34, the push rod 34 is slidably connected to the inner wall of the accommodating cavity 36 at one end away from the blocking piece 38;

[0237] A push frame 43, the push frame 43 is fixed to one end of the push rod 34 located in the accommodating cavity 36;

[0238] An extrusion frame 25 is installed on the side of the vehicle body 18. A convex plate 37 is provided on the extrusion frame 25. The extrusion frame 25 is located on the moving path of the ejector rod 34. The bottom surface of the extrusion frame 25 is farthest from the center of the annular frame 19.

[0239] By setting up the pushing part, based on the rotation of the annular frame 19, when the accommodating cavity 36 of the annular frame 19 rotates to the bottom, the corresponding push rod 34 is squeezed by the extrusion frame 25, and the spring 39 is compressed, which causes the push frame 43 at one end of the push rod 34 to push the blocking piece 38 downward, so that the marking material in the accommodating cavity 36 can be discharged to achieve the marking effect. When the push rod 34 leaves the extrusion frame 25, the structure is reset based on the rebound force of the annular elastic connecting part 44 and the spring 39.

[0240] Wherein, the feeding mechanism comprises:

[0241] A material tank 22, the material tank 22 is mounted on the vehicle body 18 through a support frame 20, and a feeding port 21 is provided on the material tank 22;

[0242] The mounting seat 23 is arranged just above the annular frame 19, and an output nozzle 42 is installed in the mounting seat 23, and one end of the output nozzle 42 is connected to the output end of the material tank 22 through a delivery pipe 30; a delivery pump 31 for delivery is arranged on the delivery pipe 30, and the delivery pump 31 is installed on the vehicle body 18 through a fixing frame 32;

[0243] The annular plate 40 is mounted on the inner side of the mounting seat 23. An electromagnet 41 is disposed at the bottom of the annular plate 40. The electromagnet 41 is used to attract the baffle 38.

[0244] By providing structures such as the annular plate 40 and the output nozzle 42, when the accommodating chamber 36 rotates to the top, the electromagnet 41 can attract the baffle 38, thereby opening the baffle 38 and causing the delivery pump 31 to work. The marking material can be input into the accommodating chamber 36 through the output nozzle 42, thereby achieving the purpose of supplementary feeding and facilitating the marking operation.

[0245] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coaxial measurement system for precise measurement and tamping control network of electrified conventional railway, characterized in that: It comprises a measuring device installed on a contact network (2), the measuring device comprising an L-shaped clamp assembly (1) and a detection assembly, and the detection assembly is installed on the L-shaped clamp assembly (1); The L-shaped clamp assembly (1) comprises: A first hoop member (11), the first hoop member (11) being an L-shaped structure; a second hoop member (12), the second hoop member (12) being in an L-shaped structure adapted to the first hoop member (11), and waist-shaped holes (16) being provided on the first hoop member (11) and the second hoop member (12); A fixing bolt (17), one end of which passes through the waist-shaped holes (16) of the first hoop member (11) and the second hoop member (12) and is then threadedly connected to a fixing nut (13), a flat washer (15) being arranged between the fixing nut (13) and the second hoop member (12), and an elastic washer (14) being arranged between the flat washer (15) and the fixing nut (13); The detection component comprises: An L-shaped connecting rod (6), the shape of the L-shaped connecting rod (6) being compatible with the L-shaped clamp assembly (1), the L-shaped connecting rod (6) being installed in a socket on the L-shaped clamp assembly (1), the bottom end of the GNSS plug rod (7) being compatible with the slot, and the top of the GNSS plug rod (7) being installed with a GNSS receiver antenna (8); A prism rod (9) is provided, wherein the bottom end of the prism rod (9) is adapted to the slot, and the top end of the prism rod (9) is provided with a prism (10).

2. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 1 is characterized in that: The specific construction method of the L-shaped clamp assembly (1) is as follows: ① Investigate the structural form of the station contact network and design the installation method of the L-shaped clamp assembly (1) according to the structural form of the contact network; ② The L-shaped clamp assembly (1) is made of 304 stainless steel plate, the fixing bolt (17) is made of 304 hexagonal stainless steel bolt, the fixing nut (13) is made of 304 anti-slip stainless steel nut, and the elastic pad (14) is made of anti-aging 2 mm thick rubber pad; ③ The L-shaped clamp assembly (1) is bonded to the contact network pole using epoxy resin glue during installation; ④ The socket of the L-shaped clamp assembly (1) is made of 304 stainless steel tube, wherein the length and width processing accuracy is ±0.5mm, and the length processing accuracy is ±5mm. The socket and the stainless steel part of the L-shaped clamp assembly (1) are tightly welded, and the steel tube is welded at a perpendicular angle to the vertical surface of the clamp, with an accuracy of ±5 degrees.

3. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 2 is characterized in that: The installation points of the L-shaped clamp assembly (1) include: ① During installation, check the appearance of the clamp, whether the 2mm thick non-slip rubber pad pasted with universal glue on the inner wall of the clamp is stable, and whether there is any desoldering problem at the welding part; ②Measure and mark the installation position of the clamp on the contact network pole, and install it at a height of 30cm to 50cm from the rail surface; ③ Apply epoxy resin glue on the inner wall of the clamp, and stick the clamp on the contact network pole, put in 4mm~10mm spacer rubber pads, install bolts, washers, anti-slip nuts and tighten them; ④ When tightening the fixing bolts (17), apply pre-tightening force alternately and symmetrically on both sides to prevent asymmetric tightening from causing some bolts to fail to fully exert their effectiveness and reduce the friction between the clamp and the contact network rod.

4. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 3 is characterized in that: The construction of the L-shaped connecting rod (6) specifically includes: The L-shaped connecting rod (6) comprises a long branch and a short branch, the long branch is in a horizontal state when inserted, and the short branch is in a numerical state; The long branch of the L-shaped connecting rod (6) is made of stainless steel, and the angle between the short branch and the long branch is 90 degrees; A straight-insert socket is reserved on the short branch of the L-shaped connecting rod (6), and the socket is circular; The length of the GNSS plug rod (7) at the top of the L-shaped connecting rod (6) is designed according to different GNSS receiver models to ensure that the distance between the phase center of the GNSS receiver and the top of the short branch is 150 mm. Similarly, the distance between the prism center of the prism plug rod (9) and the top of the L-shaped connecting rod (6) during the station area track control network measurement is also 150 mm.

5. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 4 is characterized in that: The first level of the control network is the station GNSS reference control network, the second level is the station throat area secondary GNSS control network, and the third level is the station throat area fixed pile track control network. The first and second levels are measured using GNSS, and the third level uses total station free station corner intersection measurement; when the coaxial measurement system is measuring, it specifically includes the following steps: S1: Installing the L-shaped clamp assembly (1) on the contact network (2); S2: Install the L-shaped connecting rod (6) on the L-shaped clamp assembly (1); S3: Installing the GNSS insertion rod (7) of the GNSS receiver antenna (8) on the L-shaped connecting rod (6); S4: Perform the first and second level tests in sequence; S5: Remove the GNSS insertion rod (7) of the GNSS receiver antenna (8) from the L-shaped connecting rod (6); S6: Install the prism rod (9) of the prism (10) at the same position of the L-shaped connecting rod (6); S7: Conduct the third level test; The measurement of the control network includes: GNSS control network plane measurement; GNSS control network height measurement; Survey and installation of reflector fixing piles; The plane measurement of the GNSS control network adopts the satellite positioning observation method and is carried out in accordance with the accuracy requirements of the second-class GNSS control points for railways. The network is laid out using the expansion method of the geodetic quadrilateral synchronous ring graphic, and adjacent synchronous rings are connected by edges. Each synchronous ring is composed of at least 4 measuring stations, and each ring synchronously observes for 2 time periods, with each period observing for more than 90 minutes.

6. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 5 is characterized in that: The measurement process of the GNSS control network plane measurement is carried out according to the following steps: S11: The optical plummet on the base must be checked and calibrated before operation, and the centering error should not exceed 1mm; S12: The antenna height is measured using a special height-measuring curved ruler. The antenna height is measured once before and after each period. The difference between the antenna height readings before and after the measurement should not exceed 2mm, otherwise the period will be invalidated. S13: After the receiver starts working, record the station number and antenna height information in time; during the observation process, observe the satellite changes, received signal quality, memory remaining and battery remaining; S14: When observing two periods, the instrument must be re-set up after the first period is completed, and re-centered and leveled before observing the next period; S15: During the operation, satellite visibility and accuracy forecasts are carried out according to the project location, and the observation period of the obstacle map is selected and arranged in combination with the point location; S16: After arriving at the measuring station, first check whether the point number is correct. After it is correct, install the receiver, center and level it, and prepare for startup. When using GNSS measurement, use a walkie-talkie at least 10m away from the antenna. S17: After the observation, collect the observation data of the day and process and analyze the data, check the observation data quality, baseline solution accuracy, repeated baseline poor, loop closure difference technical accuracy, and determine the operation tasks and observation period arrangement according to the inspection results; The error in the baseline length between adjacent points in the GNSS control network plane measurement is calculated as follows: Where: σ: mean error of baseline length, in mm; a: fixed error, unit is mm; b: proportional error coefficient, unit is mm / km; d: average side length of the baseline or ring, in km.

7. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 6 is characterized in that: The data processing of the GNSS control network plane measurement specifically includes: Data preprocessing → baseline processing → starting point and coordinate frame → baseline solution → baseline verification → 3D network adjustment → establishment of independent engineering coordinate system and calculation; The baseline check specifically includes: S21: Repeatable baseline; the repeatability of the vector in each time period reflects the internal accuracy of the baseline solution and is an important indicator for measuring the quality of the baseline solution; it is defined as: Where: are the components of the solution baseline at each time period, is the covariance of the corresponding components, is the weighted average of the corresponding baseline components, for the corresponding repeatability; Repeatability is expressed in two parts: fixed error and proportional error, namely: Where: is the mean error of the component, is the fixed error of the component, is the relative error, is the length of the component; the baseline is repeated statistically to obtain the baseline vector repeatability; S22: Synchronous loop closure error; for the synchronous loop check of the GAMIT software baseline solution, the nrms value of the solution is used as an indicator of the quality of the synchronous loop, and the nrms value cannot be greater than 0.

5.

8. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 1 is characterized in that: The control network coaxial measurement system uses a distance measurement marking device when performing distance measurement marking along the direction of the rail (3), and the distance measurement marking device includes: A vehicle body (18), wherein wheels (24) are arranged at the bottom of the vehicle body (18), and the distance between the wheels (24) on both sides is greater than the width of the two steel rails (3); A lifting platform (27), a hydraulic cylinder (26) is installed on the vehicle body (18), an output end of the hydraulic cylinder (26) is fixed on the lifting platform (27), a track wheel (28) adapted to the steel rail (3) is installed at the bottom of the lifting platform (27), and a driving mechanism for driving the track wheel (28) to move is arranged in the lifting platform (27); A feeding mechanism, the feeding mechanism is used for supplying marking materials; The marking mechanism is mounted on the vehicle body (18) and is used to output marking materials at equal intervals, thereby realizing distance measurement marking.

9. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 8 is characterized in that: The marking mechanism comprises: A rotating frame (29), a mounting frame (33) is mounted on the vehicle body (18), the rotating frame (29) is rotatably mounted on the mounting frame (33), and a driving unit for driving the rotating frame (29) to rotate is arranged in the annular frame (19); An annular frame (19), the center of the annular frame (19) coincides with the rotation center of the rotating frame (29), and the annular frame (19) is connected to the rotating frame (29) via a connecting rod (35); An accommodating cavity (36), wherein a plurality of accommodating cavities (36) are equidistantly arranged in a circumferential distribution on the annular frame (19); an annular elastic connection portion (44), the annular elastic connection portion (44) being arranged at the output end of the accommodating cavity (36), the annular elastic connection portion (44) being provided with circumferentially distributed baffles (38), the plurality of baffles (38) being supported by the annular elastic connection portion (44) to achieve blocking of the output end of the accommodating cavity (36); A pushing portion, which is arranged on the inner side of the annular frame (19) and is used to push the marking material out of the accommodating cavity (36); The push unit comprises: A push rod (34), the push rod (34) being slidably connected to an inner wall of an end of the accommodating cavity (36) away from the blocking sheet (38); A push frame (43), the push frame (43) is fixed to one end of the push rod (34) located in the accommodating cavity (36); An extrusion frame (25) is installed on the side of the vehicle body (18), a convex plate (37) is provided on the extrusion frame (25), the extrusion frame (25) is located on the moving path of the push rod (34), and the bottom surface of the extrusion frame (25) is farthest from the center of the annular frame (19).

10. The coaxial measurement system for precise measurement and tamping control network of electrified conventional railway according to claim 9, characterized in that: The feeding mechanism comprises: A material tank (22), the material tank (22) is mounted on the vehicle body (18) via a support frame (20), and a material feeding port (21) is provided on the material tank (22); A mounting seat (23), the mounting seat (23) being arranged directly above the annular frame (19), an output nozzle (42) being installed in the mounting seat (23), one end of the output nozzle (42) being connected to the output end of the material tank (22) via a delivery pipe (30); a delivery pump (31) for delivery is arranged on the delivery pipe (30), and the delivery pump (31) is installed on the vehicle body (18) via a fixing frame (32); An annular plate (40) is mounted on the inner side of the mounting seat (23). An electromagnet (41) is provided at the bottom of the annular plate (40). The electromagnet (41) is used to attract the baffle (38).

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