CN210004959U - measuring system for measuring displacement of steel rail - Google Patents
measuring system for measuring displacement of steel rail Download PDFInfo
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- CN210004959U CN210004959U CN201920775194.0U CN201920775194U CN210004959U CN 210004959 U CN210004959 U CN 210004959U CN 201920775194 U CN201920775194 U CN 201920775194U CN 210004959 U CN210004959 U CN 210004959U
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 title claims description 28
- 239000010959 steel Substances 0.000 title claims description 28
- 239000003550 marker Substances 0.000 claims abstract description 58
- 238000005259 measurement Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 9
- 238000013519 translation Methods 0.000 claims description 4
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- 230000005611 electricity Effects 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model discloses a measurement system of measurement rail displacement volume, including observation stake, the marker, rail limit support, displacement measurement appearance and surveillance center, observation stake is last to have position marker and refer to the marker, displacement measurement appearance has the casing, a video camera, liquid crystal display, a controller, position location module, outdoor temperature sensor and communication module, position location module and outdoor temperature sensor all are connected with the input electricity of controller, liquid crystal display and camera and controller both way junction, the controller is through communication module and surveillance center radio communication connection.
Description
Technical Field
The utility model relates to a measurement system, in particular to measurement systems who measure rail longitudinal displacement volume.
Background
In the process of constructing the track of the high-speed railway, steel rail joints are cancelled for reducing vibration, a seamless track line is widely applied to , but due to the disappearance of the rail joints, the steel rail cannot freely stretch out and draw back when the temperature changes, so that great temperature stress is generated in the steel rail, when the fastener pressure is not enough to counteract the temperature stress, the steel rail is displaced, a track expansion runway is caused when the temperature is continuously increased, and when the temperature is lower, rail breakage is easy to occur, so that the driving safety is seriously influenced, therefore, the displacement of the steel rail is the indispensable work of safe production of the railway.
Therefore, North China university of science and engineering is in 2019, 4 months and 2 days, the publication number is CN109556521A, unmanned aerial vehicle-based railway steel rail displacement detection device and detection method are disclosed, the unmanned aerial vehicle-based railway steel rail displacement detection device comprises an unmanned aerial vehicle, a camera, observation piles, a server and markers, the observation piles are installed on the side of a railway steel rail , the unmanned aerial vehicle hovers on the same side of the observation piles, the camera is installed below the unmanned aerial vehicle, the unmanned aerial vehicle comprises a processor for analyzing images, the processor is electrically connected with the camera, the markers are installed on two railway steel rails and the observation piles in three places respectively, the intelligent measurement mode solves the problems of large measurement error and low measurement precision of human eyes, however, unmanned aerial vehicles are arranged in each observation piles, the detection cost is undoubtedly increased, and the unmanned aerial vehicle is directly placed outdoors and cannot bear long-term wind and sunshine, the service life is greatly shortened, and the practicability is relatively weak.
Accordingly, the present inventors have made extensive studies on the above problems, and as a result, the present invention has been made.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing measurement system of measurement rail displacement volume to solve among the prior art and detect with high costs, low in service life, the relatively poor problem of practicality.
In order to achieve the purpose, the utility model discloses a measurement system for measuring rail displacement, including observation stake and marker, the observation stake erects to be in the railway rail side outside, and with the relative setting of the web of railway rail, still include rail limit support, displacement measurement appearance and surveillance center, above-mentioned rail limit support has vertical portion and horizontal part that mutually perpendicular set up, vertical portion and horizontal part constitute the L type, above-mentioned vertical portion pastes fixed setting with the web of railway rail, and with observing the relative setting of stake, with the vertical portion and the relative face of observation stake relative as the detection face, above-mentioned marker has can be discerned the position marker who obtains observation stake installation position information and is used for comparing the reference marker that the displacement squinted and consulted;
the displacement measuring instrument is detachably mounted on the rail edge support, the bottom surface and the side surface of the displacement measuring instrument are correspondingly matched with the horizontal part and the vertical part in an attaching mode, the rail edge support is provided with a rail temperature sensor, the detection end of the rail temperature sensor is attached to the rail waist of a railway steel rail, the rail temperature sensor is used for detecting the temperature of the steel rail, the output end of the rail temperature sensor is electrically connected with a electrical contact piece, the electrical contact piece is exposed at the contact part of the rail edge support and the displacement measuring instrument in the attaching mode, the displacement measuring instrument is provided with a shell, a camera, a liquid crystal display screen, a controller, a position positioning module, an outdoor temperature sensor and a communication module, the shooting end of the camera faces the detection surface of the observation pile, and the shell is provided with working windows, through which the shooting end of the camera is;
the output end of the position positioning module and the output end of the outdoor temperature sensor are both electrically connected with the input end of the controller, the liquid crystal display screen and the camera are bidirectionally connected with the controller, the output end of the controller is electrically connected with the communication module, the communication module is in wireless communication connection with the monitoring center and used for data transmission between the controller and the monitoring center, the input end of the controller is electrically connected with a second electric contact which can be in opposite contact with an electric contact, and the shell is provided with an exposed window for exposing the second electric contact.
The reference marker is a cross-shaped marker, the position marker is a position two-dimensional code containing the current observation pile code and position information, and the position marker and the reference marker are located on the rail side support.
The marker is also provided with a contraposition marker which is fixed on the vertical part and is a cross scale marker, and the cross midpoint origin of the cross scale marker is coincided with the center point of the cross marker.
The light beam emitter is also arranged in the shell, the light beam emitter is a cross laser with cross-shaped light rays, the emitting end of the cross laser coincides with the central point of the cross scale mark, the control end of the controller is electrically connected with the input end of the cross laser and used for controlling the cross laser to work, and an ejection window for ejecting the light rays of the cross laser is formed in the surface, facing the vertical part, of the shell.
The magnet is fixedly arranged on the surface facing the vertical part in the shell, the surface of the horizontal part facing the observation pile is used as the front, the left side of the top surface of the horizontal part is fixedly provided with a limit top leaning plate which can be matched with the left side surface of the shell in an attaching mode, the right side of the top surface of the horizontal part is provided with a leaning plate which is in right-left positive alignment with the limit top leaning plate, the leaning plate is arranged on the horizontal part in a left-right translation mode, and the minimum distance between the leaning plate and the limit top leaning plate is equal to the width of the shell in the left-right direction.
The th electric contact is arranged on the bottom surface of the horizontal part, the second electric contact is convexly provided with a positioning convex particle which penetrates through the horizontal part from bottom to top, the th electric contact is correspondingly arranged on the bottom surface of the shell, and the th electric contact is concavely provided with a positioning groove for the positioning convex particle to be embedded into.
The shell is a rectangular shell extending in the front-back direction, a display window exposed by a liquid crystal display screen is arranged on the front side face of the shell, the cross laser and the camera are arranged side by side left and right, and the working window is positioned below the display window.
The position two-dimensional code and the cross-shaped mark are arranged in an up-and-down mode, the observation piles are located on all the positions of the position two-dimensional code and the cross-shaped mark to form shooting areas, and the shooting range of the camera is matched with the shooting areas.
The position positioning module is a Beidou/GPS positioner.
After the technical scheme is adopted, the utility model discloses a measurement rail displacement's measurement system, when measuring the rail displacement of whole circuit, only need displacement measuring apparatu that the rail detection workman hand-carried to place respectively on different rail limit supports can measure the displacement volume of the different positions department of rail, realize key measurement, measurement of high efficiency, single completion measurement in 2 minutes, easy and simple to handle, and whole circuit only needs displacement measuring apparatu, therefore high practicability, measurement cost is low, can not stand the wind and blow the sun, long service life, and simultaneously, all do not have any electric part on the rail of whole circuit and the observation stake, for times nature installation, convenient for implementation, realize the non-maintaining of whole circuit, advance step and prolonged whole measurement system's life, have better using value to guaranteeing the safe operation of railway, for the research and development of seamless rail, design and construction provide comprehensive and scientific data, great significance, easily pushes away general , and use.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a block diagram of the working principle of the present invention;
FIG. 3 is a schematic view of a display of a liquid display screen;
FIG. 4 is a rear view of the displacement measuring instrument;
FIG. 5 is a schematic view of an marker at a measurement stake;
FIG. 6 is a schematic view of a second marker in a vertical position;
fig. 7 is a schematic diagram of displacement calculation.
Detailed Description
The utility model discloses a measurement system of measurement rail displacement volume, as shown in fig. 1-6, including observing stake 1 and marker, observe that stake 1 erects outside being in railway rail 100 side, observe stake 1 and be provided with a plurality of, each observes stake 1 and sets up along the length direction interval of railway rail 100, and this structure and the mounting means of observing stake 1 are the well-known technique.
The utility model discloses a measurement system still includes rail limit support 2, displacement measurement appearance and surveillance center, rail limit support 2 has vertical portion 21 and horizontal part 22 that mutually perpendicular set up, vertical portion 21 constitutes the L type with horizontal part 22, vertical portion 21 pastes and adopts the fixed setting of adhesive with the web of rail of railway track 100, and with observation stake 1 in relative setting, use vertical portion 21 and the relative facade of observation stake 1 as the detection plane, the marker has the reference marker 31 that is used for comparing the displacement skew reference, can be discerned and obtain position marker 32 and the alignment marker 33 of observation stake 1 mounted position information, it is preferred that this reference marker 31 and position marker 32 all print on the detection plane of observation stake 1, reference marker 31 is cross sign, position marker 32 is the position two-dimensional code that contains current observation stake code and positional information, can demonstrate the code of current observation stake after this position two-dimensional code discernment promptly (test point promptly, the test point, Longitude, latitude and survey line information, i.e. the ID of the survey stake, such as 010101 indicating the XX line XX kilometer XX meter position), this two-dimensional code generation is known, the alignment marker 33 is printed on the detection surface of the vertical portion, and the alignment marker 33 is a cross scale marker whose cross midpoint origin coincides with the center point of the cross marker.
The rail limit support 2 install the rail temperature sensor who is used for detecting the rail temperature, rail temperature sensor's sense terminal contacts the cooperation with the rail web of rail, and the output electricity of rail temperature sensor is connected with electrical contact (not drawn in the picture), preferentially, rail temperature sensor installs on the horizontal part, and rail temperature sensor's sense terminal passes vertical portion and pastes the cooperation with the rail web of rail mutually, install the sheetmetal of exposing on the horizontal part on rail temperature sensor's the terminal, this sheetmetal does electrical contact.
The displacement measuring instrument is detachably mounted on a rail side support, the displacement measuring instrument is provided with a shell 4, a light beam emitter, a camera, a liquid crystal display screen, a controller, a position positioning module, an outdoor temperature sensor and a communication module, the light beam emitter, the camera, the liquid crystal display screen, the controller, the position positioning module, the outdoor temperature sensor and the communication module are mounted in the shell, preferably, the shell 4 is of a rectangular structure, the length direction of the shell 4 is perpendicular to the length direction of a railway rail 100, the horizontal part 22 faces of an observation pile 1, the shell 4 is of a strip-shaped structure extending in the front-back direction, the shell 4 is fixedly mounted on a face facing a vertical part 21 in the shell 4, a limit top backup plate (not shown in the figure) capable of being in close fit with the left side face of the shell is fixedly arranged on the left side of the top face of the horizontal part 22, the limit backup plate is mounted on the horizontal part in a left-right translation mode, the limit backup plate is machined with the horizontal part, the limit backup plate is arranged on the top face of the horizontal part, the shell, the minimum distance between the horizontal plate and the horizontal plate is equal to the width of the horizontal plate, the horizontal plate is tightly clamped by using the horizontal plate, the horizontal plate is tightly stretched horizontal plate, the horizontal plate is tightly clamped horizontal plate, the horizontal plate is tightly stretched horizontal plate, the horizontal plate is tightly stretched horizontal plate, the.
The light beam emitter is a cross laser with cross light, a central origin of the cross light of the cross laser coincides with a central point of the cross scale mark, the camera and the cross laser are arranged side by side in the left-right direction, the lower part of the front face of the shell 4 is provided with working windows for exposing the emitting end of the cross laser and the shooting end of the camera respectively, the reference marker 31 and the position marker 32 are arranged in the upper-lower direction, all parts of the observation pile 1 between the reference marker 31 and the position marker 32 form an shooting area, namely preferably, the distance from the part 5cm above the reference marker 31 to the part 5cm below the position marker 32 of the observation pile 1 is the height of the shooting area, the width of the left-right direction of the observation pile 1 is the width of the shooting area, the shooting range of the camera coincides with the shooting area, the liquid crystal display screen is installed on the front side face of the shell 4, and the upper part of the front side face of the shell 4 is provided with a display window for displaying liquid crystal display screen, and the display window is located above the working window.
As shown in fig. 2, the controller is electrically connected with the control end of the cross laser to control the operation of the cross laser, the output end of the position positioning module and the output end of the outdoor temperature sensor are both electrically connected with the input end of the controller, the liquid crystal display and the camera are both bidirectionally connected with the controller, the output end of the controller is electrically connected with the communication module, the communication module is in wireless communication connection with the monitoring center and used for data transmission between the controller and the monitoring center, the position positioning module is preferably a Beidou/GPS (global positioning system) positioner, the communication module is a wireless communication module, the input end of the controller is electrically connected with a second electric contact which is in contact with the th electric contact, and the back of the shell 4 is provided with an exposed window for exposing the second electric contact.
The liquid crystal display screen is provided with a display area for displaying the temperature of the steel rail, positioning information, displacement, outdoor temperature, a test point and equipment information, the front side surface of the shell is positioned below the liquid crystal display screen and is provided with a focusing control key which is electrically connected with the input end of the controller and is used for controlling the camera to focus, an installation control key for installing the camera to adjust alignment and a distance measurement control key for controlling the system to measure distance, and the working principles of the liquid crystal display screen and the control keys are well known.
The utility model discloses a measurement system of measurement rail displacement volume has following beneficial effect:
, when patrolling and detecting, the steel rail detecting personnel only need to carry displacement measuring instruments, the displacement measuring instruments are placed on the rail side supports every rail side supports, then the displacement measuring instruments are started to measure the displacement of the steel rail at the rail side supports, key measurement is realized, the measuring efficiency is high, the measurement can be completed by a single person within 2 minutes, the operation is simple and convenient,
secondly, displacement measuring instruments are arranged on all rail side supports of the whole line together, workers can complete displacement measurement of the whole line by taking displacement measuring instruments without arranging a plurality of displacement measuring instruments, and therefore the line displacement measuring instrument is high in practicability and low in measuring cost;
the displacement measuring instrument is placed at a worker and is taken out for use when in use, the displacement measuring instrument cannot be subjected to wind, wind and sunlight, the service life is long, no electric component which is directly used for supplying power is arranged on the whole line, maintenance is avoided, and times of installation are achieved;
fourthly, whether a worker reaches a corresponding position to be detected can be detected by utilizing the position marker and a position positioning module of the displacement measuring instrument, so that the work of the worker is supervised, and the problem that the worker is lazy and has no detection is solved;
fifthly, the railway supervision center can know the condition of the steel rail at any time through the monitoring center, the safety coefficient is high, and the information of each steel rail is easy to monitor;
sixthly, the installation of the displacement measuring instrument is reliably positioned and installed by utilizing the matching of the magnet, the leaning plate and the limiting and propping plate, the measuring stability is ensured, and the displacement measuring instrument can be conveniently disassembled and assembled by utilizing the translation of the leaning plate;
seventhly, the whole system has good application value for ensuring safe operation of the railway, provides comprehensive and scientific data for research, development, design and construction of the seamless steel rail, has great significance, and is easy to popularize and apply from .
In the utility model, as shown in fig. 4, the second electric contact is convexly provided with a positioning convex grain extending out of the exposed window, the th electric contact is concavely provided with a positioning groove for the positioning convex grain to be embedded in, the cooperation of the positioning convex grain and the positioning groove is utilized to ensure that the th electric contact is excellent in contact with the second electric contact, and the positioning and guiding installation of is realized.
The utility model discloses in, for the initial positioning installation of convenient displacement detector, be equipped with triangle-shaped's zero displacement sign on the axis of counterpoint marker 33, casing 1's lateral surface is corresponding to triangle-shaped's zero displacement sign department and is equipped with the triangle-shaped sign, like this, during the counterpoint the summit of two triangle-shaped signs coincide can, easily zero-bit counterpoint.
The utility model discloses in, also can adopt the mode of three points with reference to marker 31, like this, can need not to set up the beam laser in the casing, the current picture of referring to the marker of camera shooting compares with the picture of referring to the marker of initial storage in the controller and can learn the displacement volume.
The utility model discloses a measurement method of measurement system of measurement rail displacement volume realize through following step:
, installing before measurement, installing a plurality of rail side supports 2 at intervals on the rail web of the railway steel rail 100 along the whole line, installing observation piles 1 at intervals on the outer side of the railway steel rail 100 along the direction of the whole line, arranging each rail side support in a contraposition with each observation pile , and simultaneously enabling the central point of the cross-shaped scale mark on each rail side support to coincide with the central point of the cross-shaped mark on the observation pile by adopting a collimator, wherein the step is that the operation is started at when the railway steel rail 100 is laid;
placing a displacement measuring instrument, wherein railway workers carry the displacement measuring instrument on the body when detecting along the whole line, every displacement plates move rightwards, the displacement measuring instrument is placed on the horizontal part, the back surface of the displacement measuring instrument is attached to the vertical part, the left side surface of the displacement measuring instrument is attached to the limit top leaning plate and matched with the limit top leaning plate, the leaning plate moves leftwards, the displacement measuring instrument is clamped between the leaning plate and the limit top leaning plate, positioning and installation of the displacement measuring instrument are achieved, and meanwhile, the electrical contact is in contact with the second electrical contact;
step three: detecting, starting a displacement measuring instrument, electrically connecting a rail temperature sensor with a controller, emitting cross light by a cross laser, irradiating on a detection surface of an observation pile, shooting a picture of an observation column at a shooting area by a camera, and sending temperature data obtained by respectively detecting the rail temperature sensor and an outdoor temperature sensor and position information obtained by detecting by a position positioning module to the controller;
step four, data processing, wherein the picture shot by the camera is transmitted to the controller, the controller performs calculation processing on the received picture, as shown in fig. 7, when calculation is performed, the central point of the cross-shaped identification of the observation pile is taken as the origin of coordinates (0, 0), the central point of the cross-shaped light of the cross-shaped laser in the picture is taken as the coordinate point (X, Y), the distance from the central point of the cross-shaped light of the laser lamp to the central point of the cross-shaped identification of the observation pile, namely the displacement, is calculated according to a basic formula of coordinates, the calculation mode is a known technology, and the information of the identity two-dimensional code and the positioning two-dimensional code in the picture is decoded to obtain decoding information;
and step five, data sending and displaying, wherein the displacement and the decoding information calculated in the step three and the temperature data and the information in the step two are displayed by a liquid crystal display screen, and meanwhile, the controller packages the displacement, the decoding information, the position data and the temperature data together and sends the packed data to a monitoring center for storage and viewing through a communication module.
The above embodiments and drawings do not limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be considered as departing from the scope of the present invention.
Claims (9)
- The measurement system for measuring the rail displacement comprises an observation pile and a marker, wherein the observation pile is vertically arranged outside sides of a railway rail and is arranged opposite to a rail web of the railway rail, and the measurement system is characterized by further comprising a rail edge support, a displacement measuring instrument and a monitoring center, the rail edge support is provided with a vertical part and a horizontal part which are perpendicular to each other, the vertical part and the horizontal part form an L shape, the vertical part is fixedly attached to the rail web of the railway rail and is arranged opposite to the observation pile, the opposite surface of the vertical part opposite to the observation pile is used as a detection surface, and the marker is provided with a position marker which can be identified to obtain the installation position information of the observation pile and a marker reference for comparing displacement deviation references;the displacement measuring instrument is detachably mounted on the rail edge support, the bottom surface and the side surface of the displacement measuring instrument are correspondingly matched with the horizontal part and the vertical part in an attaching mode, the rail edge support is provided with a rail temperature sensor, the detection end of the rail temperature sensor is attached to the rail waist of a railway steel rail, the rail temperature sensor is used for detecting the temperature of the steel rail, the output end of the rail temperature sensor is electrically connected with a electrical contact piece, the electrical contact piece is exposed at the contact part of the rail edge support and the displacement measuring instrument in the attaching mode, the displacement measuring instrument is provided with a shell, a camera, a liquid crystal display screen, a controller, a position positioning module, an outdoor temperature sensor and a communication module, the shooting end of the camera faces the detection surface of the observation pile, and the shell is provided with working windows, through which the shooting end of the camera is;the output end of the position positioning module and the output end of the outdoor temperature sensor are both electrically connected with the input end of the controller, the liquid crystal display screen and the camera are bidirectionally connected with the controller, the output end of the controller is electrically connected with the communication module, the communication module is in wireless communication connection with the monitoring center and used for data transmission between the controller and the monitoring center, the input end of the controller is electrically connected with a second electric contact which can be in opposite contact with an electric contact, and the shell is provided with an exposed window for exposing the second electric contact.
- 2. The kind of measuring system for measuring the displacement of steel rail according to claim 1, wherein the reference marker is a cross-shaped marker, the position marker is a two-dimensional position code containing the current observed pile code and position information, and the position marker and the reference marker are located on the rail-side support.
- 3. The kind of measuring system for measuring the displacement of steel rail according to claim 2, wherein the marker further comprises a positioning marker fixed on the vertical part, the positioning marker is a cross-shaped scale marker, and the origin of the cross-shaped midpoint of the cross-shaped scale marker coincides with the center of the cross-shaped marker.
- 4. The kind of measuring system for the displacement of a rail according to claim 3, wherein the housing further contains a light beam emitter, the light beam emitter is a cross laser whose light is cross-shaped, the emitting end of the cross laser coincides with the center point of the cross scale mark, the control end of the controller is electrically connected to the input end of the cross laser for controlling the operation of the cross laser, and an exit window for the light of the cross laser is opened on the surface of the housing facing the vertical portion.
- 5. The kind of measuring system for rail displacement according to claim 4, wherein the magnet is fixed on the surface facing the vertical part in the housing, the horizontal part faces the surface of the observation pile as the front, the left side of the top surface of the horizontal part is fixed with a limit top leaning plate which can be attached and matched with the left side surface of the housing, the right side of the top surface of the horizontal part is provided with a leaning plate which is aligned with the limit top leaning plate in the left-right direction, the leaning plate is installed on the horizontal part in the left-right translation way, and the minimum distance between the leaning plate and the limit top leaning plate is equal to the width of the housing in the left-right direction.
- 6. The kind of measuring system of rail displacement according to claim 5, wherein the electric contact is disposed on the bottom surface of the horizontal portion, and the second electric contact is protruded with a positioning protrusion passing through the horizontal portion from bottom to top, the electric contact is correspondingly disposed on the bottom surface of the housing, and the electric contact is recessed with a positioning groove for the positioning protrusion to be inserted therein.
- 7. The kinds of measuring systems for measuring the displacement of a rail according to claim 5, wherein the housing is a rectangular housing extending in the front-rear direction, a display window with a liquid crystal display screen exposed is formed on the front side of the housing, the cross laser and the camera are arranged side by side in the left-right direction, and the working window is located below the display window.
- 8. The kind of measuring system for the displacement of steel rail according to claim 2, wherein the position two-dimensional code and the cross mark are arranged in a vertical arrangement, the observing post is located at all positions of the position two-dimensional code and the cross mark to form a shooting area, and the shooting range of the camera matches with the shooting area.
- 9. The measuring system for measuring the displacement of steel rail according to claim 2, wherein the position locating module is a Beidou/GPS locator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920775194.0U CN210004959U (en) | 2019-05-27 | 2019-05-27 | measuring system for measuring displacement of steel rail |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920775194.0U CN210004959U (en) | 2019-05-27 | 2019-05-27 | measuring system for measuring displacement of steel rail |
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| CN210004959U true CN210004959U (en) | 2020-01-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057305A (en) * | 2019-05-27 | 2019-07-26 | 泉州健步电子有限公司 | A kind of measuring system measuring steel rail displacement amount |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057305A (en) * | 2019-05-27 | 2019-07-26 | 泉州健步电子有限公司 | A kind of measuring system measuring steel rail displacement amount |
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