CN111271564A - Sensor fixing device for track detection - Google Patents
Sensor fixing device for track detection Download PDFInfo
- Publication number
- CN111271564A CN111271564A CN202010213400.6A CN202010213400A CN111271564A CN 111271564 A CN111271564 A CN 111271564A CN 202010213400 A CN202010213400 A CN 202010213400A CN 111271564 A CN111271564 A CN 111271564A
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- China
- Prior art keywords
- sensor
- clamp body
- detection
- fixing device
- mounting hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 239000007822 coupling agent Substances 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims description 41
- 230000006835 compression Effects 0.000 claims description 40
- 238000003825 pressing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 239000000725 suspension Substances 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
- F16M13/02—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a sensor fixing device for rail detection, relates to the technical field of rail damage detection, and is mainly used for solving the problem that the existing sensor is easy to lose reliability due to shock when detecting the damage of a railway steel rail. The main structure is as follows: a sensor mounting hole is formed in the clamp body, a sensor with a detection end extending to the inner side of the clamp groove of the clamp body and elastically contacting with the track is arranged in the sensor mounting hole, and a coupling agent is coated on the end face of the detection end of the sensor; and an elastic waterproof ring surrounding the detection end of the sensor is arranged on the clamping groove of the clamp body. According to the sensor fixing device for rail detection, the detection end of the sensor can be attached to the rail more tightly, and meanwhile, the sensor which is installed in a suspension mode can effectively adapt to the change of the gap between the detection end and the rail, so that the sensor fixing device has the advantages of being accurate in detection, not prone to being damaged by vibration and prolonging the service life of the sensor.
Description
Technical Field
The invention relates to the technical field of rail damage detection, in particular to a sensor fixing device for rail detection.
Background
The rapid development of the high-speed railway brings great promotion to the economic and social development of various countries. Meanwhile, higher requirements are also put forward on the safety of the railway system. In order to ensure efficient and safe operation of the high-speed railway, at present, an acoustic emission sensor is mostly adopted to detect damage of a railway steel rail of the high-speed railway.
The existing acoustic emission sensor is installed and fixed on a railway steel rail of a high-speed railway, and is mainly finished by a rail detection clamp which is fixedly installed on the railway steel rail, wherein the clamp comprises a sensor fixing device and a lock hook, the sensor fixing device and the lock hook are oppositely installed on two side rail bottoms of the railway steel rail and penetrate through the two side rail bottoms for fixing through a locking screw rod, and the acoustic emission sensor is installed on the sensor fixing device and is in contact with the surface of the steel rail.
However, the high-speed train can bring strong vibration to the railway rail, so that the rail detection clamp installed and fixed on the railway rail is easy to loosen, the contact between the acoustic emission sensor and the rail is not tight, the damage detection of the acoustic emission sensor to the railway rail of the high-speed railway is easy to lose reliability, and potential safety hazards can be caused to the train, especially the running of the high-speed train on the railway.
Therefore, there is a need for a sensor fixing device for rail detection that can solve the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a sensor fixing device for track detection, which can enable the detection end of a sensor to be tightly attached to a track, and meanwhile, the sensor which is installed in a suspension mode can effectively adapt to the change of a gap between the detection end and the track, so that the sensor fixing device has the advantages of being accurate in detection, not easy to be damaged by vibration and capable of prolonging the service life of the sensor.
In order to achieve the purpose, the invention provides a sensor fixing device for rail detection, which comprises a clamp body and a fixing piece, wherein the clamp body and the fixing piece are oppositely arranged at two sides of a rail bottom through a clamp groove of the clamp body and a clamp groove of the fixing piece; and the clamp groove of the clamp body is provided with an elastic waterproof ring surrounding the detection end of the sensor.
As a further improvement of the invention, the lower part of the sensor mounting hole is provided with a mounting seat for mounting the sensor, and a first wave spring is arranged between the lower end surface of the mounting seat and the lower end outlet edge of the sensor mounting hole; and a pressing assembly for press-mounting the sensor is arranged at the upper part of the sensor mounting hole, and a compression spring is arranged between the pressing assembly and the sensor.
As a further improvement of the invention, a sensor sheath which can only move up and down in the sensor mounting hole is sleeved outside the sensor.
As a further improvement of the invention, the lower end of the sensor sheath is provided with a sheath annular seat clamped with the sensor sheath, and the sheath annular seat is arranged on the mounting seat.
As a further improvement of the invention, a second wave spring is arranged between the sheath annular seat and the mounting seat.
As a further improvement of the invention, the side wall of the sheath annular seat is provided with a wire passing notch.
As a further improvement of the present invention, the upper end surface of the sensor sheath is provided with a boss, and the compression spring is sleeved on the boss.
As a further improvement of the invention, the upper end of the elastic waterproof ring is connected with the lower end surface of the mounting seat.
As a further improvement of the invention, the side wall of the clamp body is provided with a through hole communicated with the sensor mounting hole, and a pagoda threaded joint is arranged in the through hole.
As a further improvement of the invention, the compression assembly comprises a compression nut in threaded fit with the inner wall of the sensor mounting hole, and an adjusting screw coaxially arranged with the compression nut is arranged on the compression nut; an O-shaped ring sleeved on the compression nut is arranged between the compression nut and the sensor mounting hole; the compression assembly further comprises an anti-loosening pin penetrating through the clamp body and the compression nut.
Advantageous effects
Compared with the prior art, the sensor fixing device for track detection has the advantages that:
1. according to the invention, the clamp body is provided with a sensor mounting hole which extends downwards to the upper side wall of the clamp groove of the clamp body, a sensor with a detection end extending to the inner side of the clamp groove of the clamp body and elastically contacting with a rail is arranged in the sensor mounting hole, and the end surface of the detection end of the sensor is coated with a coupling agent. And an elastic waterproof ring surrounding the detection end of the sensor is arranged on the clamping groove of the clamp body. Through installing the sensor in the sensor mounting hole with track direct contact, the cooperation sets up the couplant between sense terminal and track, enables inseparabler of sense terminal and track laminating, detects also more accurately. Simultaneously, because be elastic contact between sensor and the track, the sensor is floated installation promptly, and the gap that adaptation sense terminal and track that the sensor can be better changes, and then has and detect accurately, is difficult for receiving the advantage that the earthquake damaged. Even if the high-speed train brings strong vibration to the railway steel rail, the sensor can still be kept in close contact with the rail, and the reliability of the sensor in detecting the damage of the railway steel rail of the high-speed train is further ensured. In addition, the elastic waterproof ring surrounding the detection end of the sensor can avoid the influence of external factors on the sensor, ensure the relative isolation of the contact part of the detection end of the sensor and the track, and ensure the detection precision.
2. The lower part of the sensor mounting hole is provided with a mounting seat for mounting a sensor, and a first wave spring is arranged between the lower end face of the mounting seat and the lower end outlet edge of the sensor mounting hole. The upper portion of sensor mounting hole is equipped with the subassembly that compresses tightly that is used for the pressure equipment sensor, compresses tightly and is equipped with compression spring between subassembly and the sensor. The cooperation of the first ripples spring of sensor below and the compression spring of sensor top makes during the sensor can floated installation sensor mounting hole, and then makes the sensor have and detect accurately, is difficult for receiving the damage of shaking, improves sensor life advantage.
3. The sensor sheath which can only move up and down in the sensor mounting hole is sleeved outside the sensor. The sensor sheath can effectively protect the sensor and avoid the sensor from being damaged. Meanwhile, the sensor sheath can only move up and down, and the sensor sheath can be prevented from driving the sensor to axially rotate, so that the circuit on the sensor is prevented from being distorted and damaged.
4. And a second wave spring is arranged between the sheath annular seat and the mounting seat. The second wave spring is matched with the first wave spring, so that the sensor can be further protected, and the sensor is prevented from being damaged by vibration.
5. The side wall of the sheath annular seat is provided with a wire passing notch. The wire passing notch can facilitate the passing of a lead on the sensor and also can avoid the relative rotation between the sensor and the sensor sheath.
6. The upper end face of the sensor sheath is provided with a bulge, and the compression spring is sleeved on the bulge. The compression spring arranged on the protruding part can avoid the horizontal displacement, and further the vertical telescopic motion of the compression spring can be stabilized.
The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an exploded view of the body of the clamp of the present invention;
fig. 4 is an exploded view of the sensor sheath of the present invention.
Wherein: 1-a clamp body; 11-clamp body slot; 12-sensor mounting holes; 2-a fixing piece; 21-a fixture slot; 22-connecting screw; 3-mounting a base; 31-an elastic waterproof ring; 32-a first wave spring; 4-a sensor; 41-pagoda thread joint; 5-a sensor sheath; 51-a sheath ring seat; 511-wire passing gap; 52-second wave spring; 53-a boss; 6-compression spring; 7-a hold-down assembly; 71-a compression nut; 72-O-ring; 73-adjusting screws; 74-anti-loosening pin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
Embodiments of the present invention will now be described with reference to the accompanying drawings.
Examples
Detailed description of the inventionas shown in fig. 1 to 4, a sensor fixing device for rail detection includes a clamp body 1 and a fixing member 2 oppositely installed on both sides of a rail bottom through a clamp body slot 11 and a fixing member slot 21. The clamp body clamping groove 11 and the fixing piece clamping groove 21 are respectively arranged on the opposite surfaces of the clamp body 1 and the fixing piece 2. In this embodiment, the shapes of the clamp body slot 11 and the fixing member slot 21 are determined according to the specific shape of the rail.
A connecting screw 22 for tightening the clamp body 1 and the fixing piece 2 is arranged between the clamp body and the fixing piece. The free end of the connecting screw 22 extends toward the clamp body 1 side and passes through the clamp body 1. The free end of the connecting screw 22 is provided with a locking nut assembly. And the connecting screw rod 22 between the clamp body 1 and the fixing piece 2 is provided with an anti-falling hoop. The upper surface of the fixing part 2 is provided with an adjusting nut component.
Wherein, the clamp body 1 is provided with a sensor mounting hole 12 which extends downwards to the upper side wall of the clamp groove 11 of the clamp body. The sensor 4 with a detection end extending to the inner side of the clamp groove 11 of the clamp body and elastically contacted with the rail is arranged in the sensor mounting hole 12. The end face of the detection end of the sensor 4 is coated with coupling agent. An elastic waterproof ring 31 surrounding the detection end of the sensor 4 is arranged on the clamp groove 11 of the clamp body.
Through installing sensor 4 in sensor mounting hole 12 with track direct contact, the cooperation sets up the couplant between sense terminal and track, enables sensor 4 sense terminal and the laminating of track inseparabler, detects also more accurately. Simultaneously, because be elastic contact between sensor 4 and the track, sensor 4 is floated installation promptly, and the gap that adapts to between sense terminal and the track that sensor 4 can be better changes, and then has and detect accurately, is difficult for receiving the advantage that the earthquake damaged. Even if the high-speed train brings strong vibration to the railway steel rail, the sensor 4 can still be kept in close contact with the rail, and the reliability of the damage detection of the sensor 4 to the railway steel rail of the high-speed railway is further ensured. In addition, the elastic waterproof ring 31 surrounding the detection end of the sensor 4 can avoid the influence of external factors on the sensor 4, ensure the relative isolation of the detection end of the sensor 4 and the contact position of a track, and ensure the detection precision.
The lower portion of the sensor mounting hole 12 is provided with a mounting seat 3 for mounting the sensor 4. A first wave spring 32 is arranged between the lower end surface of the mounting seat 3 and the lower end outlet edge of the sensor mounting hole 12. The upper part of the sensor mounting hole 12 is provided with a pressing component 7 for pressing the sensor 4. A compression spring 6 is arranged between the pressing component 7 and the sensor 4.
The cooperation of the first wave spring 32 below the sensor 4 and the compression spring 6 above the sensor 4 enables the sensor 4 to be installed in a suspension manner in the sensor installation hole 12, and then the sensor 4 has the advantages of accurate detection and difficult damage caused by vibration.
The sensor sheath 5 is fitted to the outside of the sensor 4 so as to be movable only vertically in the sensor mounting hole 12. The sensor sheath 5 can effectively protect the sensor 4 from damage. Meanwhile, the sensor sheath 5 can only move up and down, and the sensor sheath 5 can be prevented from driving the sensor 4 to axially rotate, so that the circuit on the sensor 4 is twisted and damaged.
The lower end of the sensor sheath 5 is provided with a sheath annular seat 51 clamped with the sensor sheath. The jacket ring mount 51 is mounted on the mount 3. A second wave spring 52 is arranged between the sheath annular seat 51 and the mounting seat 3. The second wave spring 52 cooperates with the first wave spring 32 to further lower and protect the sensor 4 from being damaged by a shock.
In this embodiment, the side wall of the sheath annular seat 51 is provided with a wire passing notch 511. The wire passing notch 511 can facilitate the passing of the wire on the sensor 4 and also can avoid the relative rotation between the sensor 4 and the sensor sheath 5.
The upper end face of the sensor sheath 5 is provided with a bulge 53, and the compression spring 6 is sleeved on the bulge 53. The compression spring 6 installed on the protruding portion 53 can avoid the occurrence of horizontal displacement, thereby ensuring the stable up-down telescopic movement of the compression spring 6.
In addition, the side wall of the clamp body 1 is provided with a through hole communicated with the sensor mounting hole 12. A pagoda threaded joint 41 is arranged in the through hole.
It should be noted that, in this embodiment:
the upper end of the elastic waterproof ring 31 is connected with the lower end surface of the mounting seat 3. The elastic waterproof ring 31 is made of rubber. Of course, in the actual production process, other materials may be selected to make the elastic waterproof ring 31 according to the requirement.
The compression assembly 7 includes a compression nut 71 that is threadably engaged with the inner wall of the sensor mounting hole 12. The compression nut 71 is provided with an adjusting screw 73 coaxially arranged with the compression nut, and the extrusion force of the compression assembly 7 to the sensor 4 is finely adjusted through the adjusting screw 73. Meanwhile, an O-shaped ring 72 sleeved on the compression nut 71 is arranged between the compression nut 71 and the sensor mounting hole 12. The compression assembly 7 further includes an anti-loosening pin 74 passing through the clamp body 1 and the compression nut 71.
The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.
Claims (10)
1. The sensor fixing device for rail detection comprises a clamp body (1) and a fixing piece (2) which are oppositely arranged on two sides of a rail bottom through a clamp body clamping groove (11) and a fixing piece clamping groove (21), and a connecting screw rod (22) for tightening the clamp body (1) and the fixing piece (2) is arranged between the clamp body (1) and the fixing piece (2), and is characterized in that a sensor mounting hole (12) which downwards extends to the upper side wall of the clamp body clamping groove (11) is formed in the clamp body (1), a sensor (4) with a detection end extending to the inner side of the clamp body clamping groove (11) and elastically contacting with a rail is arranged in the sensor mounting hole (12), and a coupling agent is coated on the end face of the detection end of the sensor (; and an elastic waterproof ring (31) surrounding the detection end of the sensor (4) is arranged on the clamp groove (11) of the clamp body.
2. The sensor fixing device for track detection according to claim 1, wherein the lower part of the sensor mounting hole (12) is provided with a mounting seat (3) for mounting the sensor (4), and a first wave spring (32) is arranged between the lower end surface of the mounting seat (3) and the lower end outlet edge of the sensor mounting hole (12); the sensor mounting structure is characterized in that a pressing component (7) for pressing the sensor (4) is arranged at the upper part of the sensor mounting hole (12), and a compression spring (6) is arranged between the pressing component (7) and the sensor (4).
3. The sensor fixing device for track detection according to claim 2, wherein the sensor (4) is externally sleeved with a sensor sheath (5) which can only move up and down in the sensor mounting hole (12).
4. The sensor fixing device for the track detection is characterized in that the lower end of the sensor sheath (5) is provided with a sheath annular seat (51) clamped with the sensor sheath, and the sheath annular seat (51) is installed on the installation seat (3).
5. A sensor fixation device for rail detection according to claim 4, characterized in that a second wave spring (52) is provided between the sheath ring seat (51) and the mounting seat (3).
6. The sensor fixing device for track detection as claimed in claim 4, wherein the side wall of the sheath annular seat (51) is provided with a wire passing notch (511).
7. The sensor fixing device for track detection according to claim 3, wherein the upper end face of the sensor sheath (5) is provided with a boss (53), and the compression spring (6) is sleeved on the boss (53).
8. The sensor fixing device for track inspection according to claim 2, characterized in that the upper end of the elastic waterproof ring (31) is connected with the lower end face of the mounting seat (3).
9. The sensor fixing device for track detection as claimed in claim 1, wherein a through hole for passing wires is provided on the sidewall of the clamp body (1) and communicates with the sensor mounting hole (12), and a pagoda screw joint (41) is provided in the through hole for passing wires.
10. The sensor fixing device for track detection as claimed in claim 1, wherein the compression assembly (7) comprises a compression nut (71) in threaded fit with the inner wall of the sensor mounting hole (12), and the compression nut (71) is provided with an adjusting screw (73) coaxially arranged with the compression nut; an O-shaped ring (72) sleeved on the compression nut (71) is arranged between the compression nut (71) and the sensor mounting hole (12); the compression assembly (7) further comprises an anti-loosening pin (74) penetrating through the clamp body (1) and the compression nut (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010213400.6A CN111271564A (en) | 2020-03-24 | 2020-03-24 | Sensor fixing device for track detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010213400.6A CN111271564A (en) | 2020-03-24 | 2020-03-24 | Sensor fixing device for track detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271564A true CN111271564A (en) | 2020-06-12 |
Family
ID=70995949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010213400.6A Pending CN111271564A (en) | 2020-03-24 | 2020-03-24 | Sensor fixing device for track detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710226A (en) * | 2020-12-23 | 2021-04-27 | 西安交通大学 | Track jaw face test fixture and application and track jaw face test device based on same |
-
2020
- 2020-03-24 CN CN202010213400.6A patent/CN111271564A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710226A (en) * | 2020-12-23 | 2021-04-27 | 西安交通大学 | Track jaw face test fixture and application and track jaw face test device based on same |
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