CN112902939A - Rail clearance measuring device and rail clearance measuring method - Google Patents
Rail clearance measuring device and rail clearance measuring method Download PDFInfo
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- CN112902939A CN112902939A CN202110341423.XA CN202110341423A CN112902939A CN 112902939 A CN112902939 A CN 112902939A CN 202110341423 A CN202110341423 A CN 202110341423A CN 112902939 A CN112902939 A CN 112902939A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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Abstract
The invention provides a rail clearance measuring device which comprises a base, an upright post, a distance measuring device and a moving device, wherein the upright post is movably connected with the base, the distance measuring device is installed on the upright post and used for measuring rail clearance, and the distance measuring device is installed on the base and can drive the base to move along a rail. Meanwhile, the invention also provides a rail clearance measuring method which adopts the rail clearance measuring device. Compared with the prior art, the rail clearance measuring device and the rail clearance measuring method are low in cost and simple to operate, can effectively guide workers to perform field construction and installation operation, and meet the requirement of rail clearance detection control.
Description
Technical Field
The invention relates to the technical field of construction measurement control, in particular to a rail clearance measuring device and a rail clearance measuring method.
Background
With the continuous and rapid development of national society and economy, the acceleration of informatization, industrialization, marketization and urbanization processes inevitably drives the rapid flow of all social personnel and materials, and the total transportation demand is continuously increased. The rail transit is a popular transportation tool due to the characteristics of long transportation distance, large transportation volume, rapid and comfortable transportation, economy, convenience, high transportation efficiency, safety, punctuality, small pollution and the like, and the scale, the quantity and the speed of rail transit construction are rapidly expanded and rapidly developed.
In order to ensure the requirements of high speed, intelligence and safe operation of the train, all buildings and facilities serving the track have direct interaction equipment with locomotives and vehicles, and the equipment cannot invade the safety limit of the track under any condition, so that safe driving is ensured. In the process of track construction, the positions of a concrete structure, a contact net support column, a protective guard or a sound barrier, an evacuation platform, trackside equipment, a support and a pipeline are required to be rapidly measured and detected, the parameters such as offset distance, elevation and the like based on the track are controlled, and the equipment is ensured to be positioned outside a safety limit and normally operate.
The detection of the rail boundary and the edge distance is mainly divided into detection of a measuring instrument and detection of the boundary of the subway vehicle according to objects and different detection stages. The construction stage mainly adopts a measuring instrument for detection, a total station or a section detector is used for measuring the finished concrete structure and related equipment facilities, the measurement data is converted into deviation relative to the center line of the track, whether the deviation exceeds the limit or meets the standard is judged by comparing with the design or theoretical position and the limit value, and the construction error is allowed due to the laying of the track, and the detection needs to be carried out again in the later stage. After the track is laid and finely adjusted, a door type detection template is manufactured according to limit coordinates, the door type detection template is installed at a calibrated position on a rail car, the minimum limit is detected, whether the minimum limit is invaded or not is judged according to whether equipment gives an alarm or not, and the position exceeding the limit is displayed.
The limit measurement and detection method has the disadvantages of expensive equipment, high requirement on professional skills of operators, complex measurement method, high use cost, large interference on construction and incapability of effectively guiding construction in time. Particularly, in the construction process, the size of partial trackside facilities needs to be customized or controlled according to the deviation of a relative line of a structure and the vehicle clearance, and the subway vehicle clearance detection vehicle does not have the function; the measuring instrument detection has high requirements on the working environment visibility conditions, the facility cable is very easy to interfere, meanwhile, the measured data needs to be processed professionally, the effect that the measured data can be seen and obtained cannot be achieved, and the installation, construction and field judgment are inconvenient.
Disclosure of Invention
The method aims at the technical problems that in the prior art, equipment for measuring the rail clearance is high in cost, high in requirement on professional skills of operators and complex in measuring method. The invention provides a rail clearance measuring device which is low in cost and simple to operate.
A rail clearance measurement device, comprising:
a base;
the upright post is movably connected with the base;
the distance measuring device is arranged on the upright post and used for measuring the limit of the track;
and the moving device is arranged on the base and can drive the base to move along the track.
Preferably, the rail clearance measuring apparatus further comprises:
the midline retaining device is arranged on the base and used for limiting the relative positions of two ends of the base.
Preferably, the mobile device includes:
the first roller is arranged at one end of the base;
the second roller is arranged at the other end of the base;
the midline holding device comprises:
the baffle is arranged on one side close to the first roller;
the midline maintaining system is arranged at one side close to the second roller;
when the base is installed on the track, the baffle and the midline holding system are respectively and correspondingly abutted against the inner sides of two steel rails of the track.
Preferably, the midline holding system comprises:
an elastic extensible member;
the connecting part is arranged at one end of the elastic telescopic piece and is fixedly connected with the base;
and the limiting part is arranged at the other end of the elastic telescopic piece, and at least part of the limiting part extends out of the base and is used for being abutted against the inner side of the steel rail.
Preferably, the stopper portion includes:
the limiting piece is arranged at the other end of the elastic telescopic piece;
and the pulley is positioned at the bottom of the limiting part and is hinged with the limiting part.
Preferably, the number of the first rollers is two, the two first rollers are oppositely arranged at intervals and along the extending direction of the track, and the second roller is located between the two first rollers.
Preferably, the base includes:
a frame body;
the connecting shaft is arranged on the frame body, and the arrangement direction of the connecting shaft is parallel to the track;
the upright post is hinged with the connecting shaft, and the hinge center of the upright post and the connecting shaft is superposed with the rail top connecting center of the two steel rails.
Preferably, the stand is a telescopic rod, and the stand includes:
a fixed joint;
the movable joint is arranged in the fixed joint, and the top of the movable joint is provided with an installation groove;
the distance measuring device includes:
a laser rangefinder body;
the installed part set up in on the laser range finder body, and with the mounting groove phase-match.
Preferably, the fixed knot is provided with a horizontal detection device.
Meanwhile, the invention also provides a rail clearance measuring method, which comprises the following steps:
s1, assembling the rail limit measuring device as described in any one of the above;
s2, placing the rail limit measuring device on a rail;
and S3, starting the distance measuring device, and moving the track limit measuring device to a required measuring area.
Compared with the prior art, the rail limit measuring device provided by the invention comprises a base, an upright post movably connected with the base, a distance measuring device arranged on the upright post and used for measuring the rail limit, and a moving device arranged on the base and capable of driving the base to move along the rail. The track limit measuring device is simple in structure and low in cost, the distance measuring device can be moved to an area needing to be measured through the moving device when the track limit measuring device is used, the position of the distance measuring device can be adjusted through the upright post, the requirement on professional skill of an operator is low, and the track limit measuring device is simple to operate.
Correspondingly, the rail clearance measuring method provided by the invention adopts the rail clearance measuring device, is simpler and more convenient to operate, and can realize rapid measurement of the rail clearance.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic perspective view of a rail clearance measuring device mounted on a rail according to an embodiment;
FIG. 2 is a perspective view of the base shown in FIG. 1;
FIG. 3 is a schematic perspective view of the column of FIG. 1;
FIG. 4 is a schematic perspective view of the distance measuring device shown in FIG. 1;
fig. 5 is a schematic view of the centerline maintaining system shown in fig. 1.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
The invention provides a rail clearance measuring device which comprises a base, an upright post, a distance measuring device and a moving device, wherein the upright post is movably connected with the base, the distance measuring device is installed on the upright post and used for measuring rail clearance, and the distance measuring device is installed on the base and can drive the base to move along a rail. The track clearance measuring device is low in cost and simple to operate, can effectively guide workers to conduct on-site construction and installation operation, and meets the requirement of track clearance detection control.
Please refer to fig. 1 to 5. The invention provides a rail clearance measuring device 100 which is applied to a rail 200 and used for detecting and controlling rail clearance. The rail clearance measuring device 100 comprises a base 10, a column 20, a distance measuring device 30 and a moving device 40, wherein the column 20 is movably connected with the base 10, the distance measuring device 30 is installed on the column 30 for measuring rail clearance, and the moving device 40 is installed on the base 10 and can drive the base 10 to move along the rail 200. So that the base 10 can be mounted on the rail 200 by the moving means 40 and moved on the rail 200, so that the base 10 can be more conveniently moved to an area to be measured when in use. Wherein, the movable connection between the pillar 20 and the base 10 specifically includes: the support post 20 is detachably connected to the base 10, and is hinged to the base 10 when the support post 20 is mounted on the base 10. Of course, in other embodiments, the support post 20 may be detachably connected to the base 10 only, or the support post 20 may be hinged to the base 10 only, or even the support post 20 may be fixed to the base 10. In the embodiment, the support post 20 is detachably connected with the base 10, so that the support post 20 and the base 10 are convenient to transport, and when the support post 20 is not needed to be used, the support post 20 can be detached, so that the support post 20 is more convenient to transport. Meanwhile, the support column 20 is hinged to the base 10, the position of the support column 20 can be finely adjusted, and the position of the distance measuring device 30 can be finely adjusted, so that the detection accuracy of the rail clearance measuring device 100 can be effectively guaranteed, and the rail clearance can be better detected and controlled. The track clearance measuring device 100 is simple in structure, low in cost, low in requirement on professional skills of operators, simple to operate, capable of effectively guiding workers to conduct field construction and installation operation, and capable of meeting the requirement of track clearance detection and control.
Preferably, the rail clearance measuring apparatus 100 further includes a centerline holding device 50, and the centerline holding device 50 is disposed on the base 10 to limit the relative positions of the two ends of the base 10. Namely, the center line holding device 50 is used to prevent the two ends of the base 10 from shifting laterally relative to the rails 200, so that the distance measuring device 30 of the upright 20 can be prevented from shifting, and the position of the distance measuring device 30 can be effectively ensured. The error of the rail clearance measuring device 100 during measurement is reduced, and the accuracy of the measurement result of the rail clearance measuring device 100 is effectively guaranteed.
Preferably, the moving device 40 includes a first roller 41 and a second roller 42, and the centerline holding device 50 includes a baffle 51 and a centerline holding system 52. The first roller 41 is disposed at one end of the base 10, and the second roller 42 is disposed at the other end of the base 10, so that the first roller 41 and the second roller 42 can be respectively placed on two rails of the track 200. The baffle 51 is disposed on a side close to the first roller 41, the centerline retaining system 52 is disposed on a side close to the second roller 42, and when the base 10 is mounted on the track 200, the baffle 51 and the centerline retaining system 52 respectively abut against inner sides of two rails of the track 200. After the base 10 is installed and moved, the relative positions of the two ends of the base 10 can be limited by the abutment of the baffle 51 and the centerline holding system 52 with the rails, so that the base 10 does not shift laterally to affect the accuracy of the measurement.
Preferably, the midline holding system 52 comprises an elastic expansion piece 521, a connecting part 522 and a limiting part 523, wherein the connecting part 522 is disposed at one end of the elastic expansion piece 521 and is fixedly connected with the base 10, and the limiting part 523 is disposed at the other end of the elastic expansion piece 521 and at least partially extends out of the base 10 to abut against the inner side of the steel rail. Therefore, the elastic expansion piece 521 enables the limiting part 523 to be abutted against the steel rail better, the elastic expansion piece 521 can be compressed to facilitate installation of one side of the baffle 51 during installation, and after installation is completed, the elastic expansion piece 521 can also generate restoring force to enable the limiting part 523 to abut against the steel rail, so that the limiting effect of the midline retaining system 52 is ensured. Meanwhile, when the limit portion 523 is worn, the elastic expansion member 521 can also compensate the worn position of the limit portion 523, so that the limit portion 523 is abutted against the steel rail, and the transverse offset of the base 10 is effectively avoided. Specifically, in this embodiment, the elastic expansion element 521 is an expansion spring with high elasticity.
Preferably, the limiting portion 523 includes a limiting member 5231 and a pulley 5232, the limiting member 5231 is disposed at the other end of the elastic expansion member 521, and the pulley 5232 is located at the bottom of the limiting member 5231 and is hinged to the limiting member 5231. So that the pulleys 5232 can also slide on the inner sides of the rails when the rail clearance measuring device 100 is pushed to move on the rail 200, reducing the resistance of a worker pushing the rail clearance measuring device 100, facilitating the use. In addition, the contact area between the limiting piece 5231 and the pulley 5232 can be effectively increased, and the limiting effect is further ensured.
Preferably, there are two first rollers 41, two first rollers 41 are oppositely disposed at intervals, and along the extending direction of the track 200, the second roller 42 is located between the two first rollers 41. Namely, the two first rollers 41 and the second roller 42 are integrally distributed in a triangular structure, so that the stability is effectively guaranteed.
Preferably, the base 10 includes a frame body 11 and a connecting shaft, the connecting shaft is disposed on the frame body 11, and the direction of the connecting shaft is parallel to the rail 200. The upright column 20 is hinged with the connecting shaft, and the hinged center of the upright column 20 and the connecting shaft is superposed with the rail top connecting center of the two steel rails. I.e. the centre line of the upright 20 is located at the centre of the rail head joint of the two rails, so that the distance measuring device 30 can better and more intuitively measure the limits of the two sides of the rail 200.
Preferably, the upright post 20 is a telescopic rod, the upright post 20 comprises a fixed joint 21 and a movable joint 22, the movable joint 22 is arranged in the fixed joint 21, and the top of the movable joint is provided with a mounting groove 221. Range unit 30 includes laser range finder body 31 and installed part 32, installed part 32 set up in on the laser range finder body 31 and with mounting groove 221 phase-match. It can be understood that, by providing the upright post 20 with a telescopic structure, the height of the laser distance measuring apparatus body 31 can be adjusted, so that the laser distance measuring apparatus body 31 can better measure the relevant structures to be measured. Specifically, in this embodiment, the laser range finder body 31 includes a bluetooth laser range finder and a bluetooth controller.
Preferably, the fixing joint 21 is provided with a horizontal detection device 60, so that the horizontal state of the column 20 can be detected by the horizontal detection device 60. When the device is used, the vertical column 20 can be adjusted to the vertical position by observing the horizontal detection device 60, so that the data obtained by detecting the laser range finder body 31 can more intuitively obtain a result, and the need of calculating for multiple times is avoided. It can be understood that, in this embodiment, the upright post 20 is hinged to the base 10, and whether the angle at which the upright post 20 is located is the vertical direction is observed visually through the level detection device 60, so that the error in measurement can be further reduced. And after long-term use, even if the upright post 20 is worn, the position of the distance measuring device 30 can be effectively ensured and the measuring error can be reduced by adjusting the upright post 20 and observing the horizontal detection device 60.
The rail clearance measuring device 100 solves the technical problem of a method for quickly measuring, detecting and controlling the side clearance of auxiliary structures such as rail (subway and railway) building clearances, vehicle clearances, concrete structures in equipment clearance ranges, contact net pillars, guard rails or sound barriers, evacuation platforms, trackside equipment, supports, pipelines and the like based on different heights of rails. The device does not need other section measuring instruments, the midpoint of the central connecting line of the two steel rail tops of the rail is used as a coordinate origin, a horizontal coordinate axis is led out by the origin or the connecting line of the two rail tops is used as an X axis according to needs, the coordinate axis perpendicular to the X axis through the origin is used as a Y axis, under the condition of meeting the precision, the device is not influenced by the ultrahigh curve, the edge distance or the limit value of a related auxiliary structure can be directly measured on site, and the device has the characteristics of convenience in carrying, simplicity in operation, quickness in detection, safety, reliability and the like, the site construction and installation operation of workers is effectively guided, and the requirement of rail limit detection control is. The rail clearance measuring device 100 is not affected by curve radius and line height, can be suitable for rail clearance or clearance detection of railways and subways in various grades, is greatly convenient for field operation and detection, and fills up a specialized tool and a control method based on rail clearance or clearance detection in a construction stage.
The operating principle of the rail clearance measuring device 100 is as follows: after the geometric state elevation of the track, the central line, the gauge, the superelevation and other parameters meet the requirements, the device is placed on the track, three points on the device are in contact with the top surface of the steel rail to form a stable plane, the vertical position of the upright column 20 in the middle of the device is adjusted through the level detection device 60, a coordinate system with the center of the steel rail top connecting line, namely the track center datum point, as the original point is established, the horizontal plane passing through the original point is the X axis, the plumb line is the Y axis, the height of the upright column 20 is adjusted, the side distance or the clearance of a track related structure, a facility and equipment is measured through the laser range finder body 31 arranged at the top end of the upright column 20, the rapid measurement is realized, visible and available data are obtained, and the purpose.
Specifically, in this embodiment, the support body 11 adopts the solid frame construction of aluminum alloy, through adopting frame column structure, can effectual save material, has also reduced weight, has made things convenient for the transportation, adopts solid aluminum alloy also structural strength to also can satisfy the demand simultaneously, ensures measuring accuracy and stability. The base 10 integrally adopts a triangular stable structure, so that the stability of the base 10 can be effectively guaranteed, and the measuring precision can be effectively guaranteed. The first roller 41 and the second roller 42 are ceramic wheels, thereby facilitating movement of the rail clearance measuring device 100 on the rail 200. The baffle 51 is in contact with the position 16mm below the tops of the steel rails, so that the base 10 is prevented from laterally shifting, and the baffle 51 and the midline maintaining system 52 ensure that the base 10 is always positioned between the two steel rails of the rail 200. Preferably, the first roller 41 and the second roller 42 are provided with braking devices, and the position can be fixed by the braking devices when the rail limit measuring device 100 is used or not used. The upright post 20 is made of an aluminum alloy material rod piece, so that the stability of the upright post 20 is guaranteed. Preferably, the height gauge is marked on the upright post 20 along the height direction, so that the height of the laser range finder body 31 which is adjusted currently can be more visually seen in use.
Meanwhile, the embodiment also provides a rail clearance measuring method, which comprises the following steps:
s1, assembling the rail limit measuring device 100;
specifically, the step S1 is preceded by laying and arranging the track 200, and the step S1 is started when the geometric state elevation, centerline, track gauge, superelevation, and other parameters of the track 200 meet the requirements.
Preferably, the step S1 includes the following steps:
s11, transporting each part of the rail limit measuring device 100 to a safety section beside the rail 200;
s12, fixing the midline holding system 52 on the base 10;
s13, mounting the upright post 20 in the middle of the base 10 through hinge;
and S14, fixing the distance measuring device 30 on the top of the upright post 20, and firmly fixing by adopting a locking nut.
S2, placing the rail limit measuring device 100 on the rail 200;
preferably, the step S2 includes the following steps:
s21, placing one side of the second roller 42 on one of the rails of the track 200, and applying a thrust to compress the midline holding system 52;
s22, placing one side of the first roller 41 on another steel rail of the track 200, and allowing the first roller 41 and the second roller 42 to be in close contact with the steel rail without a gap.
S3, starting the distance measuring device 30 and moving the track limit measuring device 100 to a required measuring area;
preferably, the step S3 includes the following steps:
s31, starting the laser range finder body 31;
s32, pushing the rail limit measuring device 100 to move on the rail 200, and moving the rail limit measuring device 100 to a required measuring position;
s33, adjusting the height of the movable joint 22, and adjusting the laser range finder body 31 to a required measurement elevation;
s34, angling the upright post 20 to the vertical direction;
and S35, obtaining the distance from the laser range finder body 31 to the center of the track 200 or the actually measured limit value.
Specifically, in step S34, the adjustment of the column 20 is completed by adjusting the level bubble in the level detecting device 60 to be centered.
Compared with the prior art, the rail limit measuring device provided by the invention comprises a base, an upright post movably connected with the base, a distance measuring device arranged on the upright post and used for measuring the rail limit, and a moving device arranged on the base and capable of driving the base to move along the rail. The track limit measuring device is simple in structure and low in cost, the distance measuring device can be moved to an area needing to be measured through the moving device when the track limit measuring device is used, the position of the distance measuring device can be adjusted through the upright post, the requirement on professional skill of an operator is low, and the track limit measuring device is simple to operate.
Correspondingly, the rail clearance measuring method provided by the invention adopts the rail clearance measuring device, is simpler and more convenient to operate, and can realize rapid measurement of the rail clearance.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A rail clearance measuring device, comprising:
a base;
the upright post is movably connected with the base;
the distance measuring device is arranged on the upright post and used for measuring the limit of the track;
and the moving device is arranged on the base and can drive the base to move along the track.
2. The rail clearance measuring device of claim 1, further comprising:
the midline retaining device is arranged on the base and used for limiting the relative positions of two ends of the base.
3. The rail clearance measuring device of claim 2, wherein the moving device comprises:
the first roller is arranged at one end of the base;
the second roller is arranged at the other end of the base;
the midline holding device comprises:
the baffle is arranged on one side close to the first roller;
the midline maintaining system is arranged at one side close to the second roller;
when the base is installed on the track, the baffle and the midline holding system are respectively and correspondingly abutted against the inner sides of two steel rails of the track.
4. The rail clearance measuring device of claim 3, wherein the centerline retention system comprises:
an elastic extensible member;
the connecting part is arranged at one end of the elastic telescopic piece and is fixedly connected with the base;
and the limiting part is arranged at the other end of the elastic telescopic piece, and at least part of the limiting part extends out of the base and is used for being abutted against the inner side of the steel rail.
5. The rail clearance measuring device of claim 4, wherein the limiting portion comprises:
the limiting piece is arranged at the other end of the elastic telescopic piece;
and the pulley is positioned at the bottom of the limiting part and is hinged with the limiting part.
6. The rail clearance measuring device of any one of claims 3 to 5, wherein the first rollers are provided in two numbers, the two first rollers being disposed at an interval from each other and the second roller being located between the two first rollers in an extending direction of the rail.
7. The rail clearance measuring device of claim 6, wherein the base comprises:
a frame body;
the connecting shaft is arranged on the frame body, and the arrangement direction of the connecting shaft is parallel to the track;
the upright post is hinged with the connecting shaft, and the hinge center of the upright post and the connecting shaft is superposed with the rail top connecting center of the two steel rails.
8. The rail clearance measuring device of claim 7, wherein the post is a telescoping rod, the post comprising:
a fixed joint;
the movable joint is arranged in the fixed joint, and the top of the movable joint is provided with an installation groove;
the distance measuring device includes:
a laser rangefinder body;
the installed part set up in on the laser range finder body, and with the mounting groove phase-match.
9. The rail clearance measuring device of claim 8, wherein a level detector is provided on the fixed joint.
10. A rail clearance measurement method, comprising the steps of:
s1, assembling a rail clearance measuring device of any one of claims 1 to 9;
s2, placing the rail limit measuring device on a rail;
and S3, starting the distance measuring device, and moving the track limit measuring device to a required measuring area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341423.XA CN112902939A (en) | 2021-03-30 | 2021-03-30 | Rail clearance measuring device and rail clearance measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110341423.XA CN112902939A (en) | 2021-03-30 | 2021-03-30 | Rail clearance measuring device and rail clearance measuring method |
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| CN112902939A true CN112902939A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110341423.XA Pending CN112902939A (en) | 2021-03-30 | 2021-03-30 | Rail clearance measuring device and rail clearance measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115930742A (en) * | 2023-02-21 | 2023-04-07 | 沈阳衡器制造有限公司 | Measuring device for rail weighbridge installation |
-
2021
- 2021-03-30 CN CN202110341423.XA patent/CN112902939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115930742A (en) * | 2023-02-21 | 2023-04-07 | 沈阳衡器制造有限公司 | Measuring device for rail weighbridge installation |
| CN115930742B (en) * | 2023-02-21 | 2023-05-16 | 沈阳衡器制造有限公司 | Measuring device for rail weighbridge installation |
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