CN208868063U - A kind of device of dynamic detection non-fragment orbit defect - Google Patents
A kind of device of dynamic detection non-fragment orbit defect Download PDFInfo
- Publication number
- CN208868063U CN208868063U CN201821626929.5U CN201821626929U CN208868063U CN 208868063 U CN208868063 U CN 208868063U CN 201821626929 U CN201821626929 U CN 201821626929U CN 208868063 U CN208868063 U CN 208868063U
- Authority
- CN
- China
- Prior art keywords
- regulating mechanism
- detection
- track detection
- detection car
- mounting plate
- Prior art date
- 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.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a kind of devices of dynamic detection non-fragment orbit defect, including track detection car, sound wave excitation unit, microphone sensor and computer, the sound wave excitation unit is connected with a pair of axial displacement regulating mechanism, the microphone sensor is connected with an adaptive displacement feedback regulation device, and twin shaft displacement regulating mechanism and adaptive displacement feedback regulation device are fixedly connected in the front end of track detection car.The utility model realizes the dynamic detection to non-fragment orbit defect, it is fast, high-efficient with detection speed, detection operation at a distance can be carried out in several hours Window times, and testing result is not affected by the external environment substantially, detection accuracy is high, and defective locations can be marked simultaneously in favor of later maintenance maintenance, so that detection and maintenance work efficiency are greatly improved.
Description
Technical field
The utility model is to be related to a kind of device of dynamic detection non-fragment orbit defect, belongs to railroad flaws detection technique neck
Domain.
Background technique
Non-fragment orbit eliminates the sleeper and railway roadbed of traditional Ballast track, is by fragment-free track slab, CA screed, supporting layer
It is constituted with bedding, is a kind of slab track structure of completely new comprehensive support.With the fast development of high-speed railway, non-fragment orbit
Utilization it is more and more extensive.It is constantly exposed to due to ballastless track structure in complicated atmospheric environment, by many factors (train
Load, environmental condition etc.) long term influence, cause to generate various defects, including line flowering structure relief, through crack and
CA screed comes to nothing equivalent damage.On the one hand main cause is that can generate to squeeze to non-fragment orbit in train high-speed overload operational process
The effects of pressure, impact, causes it internal it is possible that leakiness, crack or cavity, outside form damaging layer or honeycomb fiber crops layer
Etc. various defects；On the other hand be due to non-fragment orbit in pre-production because construction technology, construction experience may deposit
In problem, lead to inherently existing defects；In addition, also leading to production under the natural calamities such as the erosion of sleet, variation of ambient temperature
Raw defect.Because the presence of defect will seriously affect the bearing capacity and durability of non-fragment orbit, it will ballastless track structure is caused to lose
Effect, not can guarantee the stability and ride comfort of ballastless track of high-speed railway and line flowering structure, and stability and ride comfort are exactly
Guarantee high-speed rail is quickly pacified with the important prerequisite condition of safe operation, the person of the normal operation and passenger that will be directly related to train
Entirely.
There are far infrared imaging or Electromagnetic Wave Detection skill using more about the defect detecting technique of non-fragment orbit at present
Art, but far infrared imaging technique is affected by ambient temperature, is not suitable for working on the high-speed railway of field, electromagnetic wave
Technology is then highly susceptible to the influence of reinforcing bar in track plates, track board memory complicated reinforcing bar, make electromagnetic wave technology
Testing result there are deviations.In addition, current detection technique is stationary detection technique, it can only be in the skylight of repair and maintenance
Interior progress, and rail traffic is used to for effective Window time that line maintenance is safeguarded be only 2-3 hours, and high-speed railway
Thread is again very long, not only expends a large amount of manpower and material resources according to existing detection means, but also efficiency is very low, detection maintenance
Cost is very high, so that not being able to satisfy rail safety early warning demand, therefore researching and developing one kind can efficient, Dynamic Non-Destruction Measurement non-fragment orbit
The device of defect will be of great significance and be worth.
Utility model content
In view of the above-mentioned problems existing in the prior art and demand, the purpose of the utility model is to provide a kind of dynamic detection without
The device of tiny fragments of stone, coal, etc. railroad flaws is mentioned with realizing that efficient, lossless, real-time detection goes out the defect of non-fragment orbit for the safe operation of high-speed rail
For timely early warning and powerful guarantee.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of device of dynamic detection non-fragment orbit defect, including track detection car, sound wave excite unit, microphone sensor
And computer, sound wave excitation unit are connected with a pair of axial displacement regulating mechanism, the microphone sensor and one adaptive
Displacement Feedback regulating device is answered to be connected, and twin shaft displacement regulating mechanism and adaptive displacement feedback regulation device are fixed
It is connected to the front end of track detection car.
A kind of preferred embodiment, described device further include flaw labeling mechanism, and the flaw labeling mechanism includes paint storage
Container, pressure pump and injection pipe, the paint storage container are connected with pressure pump, and the pressure pump is connected with injection pipe,
And the pressure pump is connect with Computer signal.
A kind of embodiment, the twin shaft displacement regulating mechanism include that length travel regulating mechanism A and lateral displacement are adjusted
Mechanism A, the length travel regulating mechanism A include longitudinal carrier A and longitudinal electric screw rod regulating mechanism A, the lateral displacement
Regulating mechanism A includes horizontal support A and transverse electric screw rod regulating mechanism A, the longitudinal carrier A and horizontal support A laterally sliding
Dynamic connection slidably connects mounting plate A on the longitudinal carrier A, and the sound wave excitation unit is fixedly connected with mounting plate A,
Also, vertical deviation sensors A is installed on the left or right side of the mounting plate A, the horizontal support A is fixedly connected on
The front end of track detection car.
Further embodiment, sound wave excitation unit include vibration excitor and exciting rod, the top of the exciting rod with
The output end of vibration excitor is fixedly connected, and the bottom end of the exciting rod is fixedly connected with a pressure sensor.
A kind of preferred embodiment, the vibration excitor are Electrodynamic Vibrators.
A kind of embodiment, the adaptive displacement feedback regulation device include mounting plate B, length travel regulating mechanism B
With lateral displacement regulating mechanism B, a rotary electric machine is installed on the mounting plate B, the microphone sensor is fixedly mounted
In the shaft of rotary electric machine；The length travel regulating mechanism B includes longitudinal carrier B and longitudinal electric screw rod regulating mechanism B,
The lateral displacement regulating mechanism B includes horizontal support B and transverse electric screw rod regulating mechanism B, the mounting plate B and longitudinal branch
Frame B slides up and down connection, and the longitudinal carrier B slides laterally with horizontal support B to be connect, and the horizontal support B is fixedly connected on
The front end of track detection car；Also, vertical deviation sensor B is installed on the left or right side of the mounting plate B.
A kind of preferred embodiment, the microphone sensor are mounted in pvc pipe.
Further embodiment, the longitudinal electric screw rod regulating mechanism A/B and transverse electric screw rod regulating mechanism A/B are equal
It is made of the sliding block connector that driving motor, one end are fixed on the screw rod of driving motor output end and connect with wire rod thread.
A kind of preferred embodiment is additionally provided with guiding mechanism in the front end of track detection car, constitutes the directive wheel and steel of guiding mechanism
Rail rolls connection.
A kind of preferred embodiment, is additionally provided with mobile power source on track detection car.
A kind of preferred embodiment, is additionally provided with wireless network module on track detection car.
A kind of preferred embodiment, is additionally provided with locator on track detection car.
A kind of preferred embodiment, is additionally provided with video camera on track detection car.
Compared with prior art, the utility model has following advantageous effects:
The utility model realizes the dynamic detection to non-fragment orbit defect, has detection speed fast, high-efficient, can be several
A hour Window time carries out detection operation at a distance, and testing result is not affected by the external environment substantially, detection accuracy
Height, and defective locations can be marked simultaneously in favor of later maintenance maintenance, so that detection and maintenance work efficiency obtain significantly
It improves, maintenance and powerful support in time can be provided for the safe operation of high-speed rail；Therefore, the utility model compared with the existing technology,
With marked improvement and application value.
Detailed description of the invention
Fig. 1 is a kind of schematic perspective view for dynamic detection non-fragment orbit defect that embodiment provides；
Fig. 2 is state diagram when embodiment described device is used to detect work.
Figure label is schematically as follows: 1, track detection car；2, sound wave excites unit；21, vibration excitor；22, exciting rod；23, it presses
Force snesor；3, microphone sensor；4, computer；5, twin shaft is displaced regulating mechanism；51, length travel regulating mechanism A；511,
Longitudinal carrier A；512, longitudinal electric screw rod regulating mechanism A；52, lateral displacement regulating mechanism A；521, horizontal support A；522, horizontal
To electronic screw rod regulating mechanism A；53, mounting plate A；54, vertical deviation sensors A；6, adaptive displacement feedback regulation device；
61, mounting plate B；62, length travel regulating mechanism B；621, longitudinal carrier B；622, longitudinal electric screw rod regulating mechanism B；63, horizontal
To displacement regulating mechanism B；631, horizontal support B；632, transverse electric screw rod regulating mechanism B；64, rotary electric machine；65, vertical position
Displacement sensor B；7, flaw labeling mechanism；71, paint storage container；72, pressure pump；73, injection pipe；8, guiding mechanism；81, it leads
To wheel；9, rail；10, mobile power source；11, wireless network module；12, track plates；13, it voluntarily walks about force mechanisms.
Specific embodiment
The technical solution of the utility model is described in further detail below in conjunction with drawings and examples.
Embodiment
It please refers to shown in Fig. 1 and Fig. 2: a kind of device of dynamic detection non-fragment orbit defect provided in this embodiment, including
Track detection car 1, sound wave excitation unit 2, microphone sensor 3 and computer 4, the sound wave excitation unit 2 and a pair of axial displacement
Regulating mechanism 5 is connected, and the microphone sensor 3 is connected with an adaptive displacement feedback regulation device 6, and the twin shaft
Displacement regulating mechanism 5 and adaptive displacement feedback regulation device 6 are fixedly connected in the front end of track detection car 1.
In the present embodiment:
The sound wave excitation unit 2 includes vibration excitor 21 and exciting rod 22, top and the vibration excitor 21 of the exciting rod 22
Output end be fixedly connected, be installed with a pressure sensor 23 in the bottom end of the exciting rod 22.
The twin shaft displacement regulating mechanism 5 includes length travel regulating mechanism A 51 and lateral displacement regulating mechanism A 52,
The length travel regulating mechanism A 51 includes longitudinal carrier A 511 and longitudinal electric screw rod regulating mechanism A 512, the transverse direction
Being displaced regulating mechanism A 52 includes horizontal support A 521 and transverse electric screw rod regulating mechanism A 522, the longitudinal carrier A
511 slide laterally with horizontal support A 521 and connect, and mounting plate A 53 is slidably connected on the longitudinal carrier A 511, described
Vibration excitor 21 is fixedly connected with mounting plate A 53, also, is equipped with vertical position on the left or right side of the mounting plate A 53
Displacement sensor A 54, the horizontal support A 521 are fixedly connected on the front end of track detection car 1.Pass through vertical deviation sensors A
The vertical distance of sound wave excitation unit 2 and track plates 12 is adjusted in 54 and length travel regulating mechanism A 51, in addition, passing through pressure
The pressure between exciting rod 22 and track plates 12 is adjusted in preset pressure model in sensor 23 and length travel regulating mechanism A 51
It is the sound wave within the scope of 10~20kHz to guarantee that sound wave excitation unit 2 can produce frequency in enclosing.
The adaptive displacement feedback regulation device 6 is including mounting plate B 61, length travel regulating mechanism B 62 and laterally
It is displaced regulating mechanism B 63, a rotary electric machine 64, the fixed peace of the microphone sensor 3 are installed on the mounting plate B 61
In the shaft of rotary electric machine 64；The length travel regulating mechanism B 62 includes longitudinal carrier B 621 and longitudinal electric silk
Bar regulating mechanism B 622, the lateral displacement regulating mechanism B 63 include that horizontal support B 631 and transverse electric screw rod adjust machine
Structure B 632, the mounting plate B 61 is slided up and down with longitudinal carrier B 621 to be connect, the longitudinal carrier B 621 and horizontal support
B 631 slides laterally connection, and the horizontal support B 631 is fixedly connected on the front end of track detection car 1；Also, in the installation
Vertical deviation sensor B 65 is installed on the left or right side of plate B 61.Mike's hearsay is adjusted by adjusting rotary electric machine 64
Mike's wind sensing is adjusted by vertical deviation sensor B 65 and length travel regulating mechanism B 62 in the acquisition direction of sensor 3
The vertical distance of device 3 and track plates 12.
In addition, sound wave, which is adjusted, by lateral displacement regulating mechanism A 52 and lateral displacement regulating mechanism B 63 excites unit
Spacing between 2 and microphone sensor 3.
The longitudinal electric screw rod regulating mechanism A 512, transverse electric screw rod regulating mechanism A 522, longitudinal electric screw rod
Regulating mechanism B 622 and transverse electric screw rod regulating mechanism B 632 is that driving motor output is fixed on by driving motor, one end
The screw rod at end and the sliding block connector being connect with wire rod thread composition, since this composed structure is known technology, therefore in figure not
It is shown specifically.
The present embodiment described device further includes flaw labeling mechanism 7, and the flaw labeling mechanism 7 includes paint storage container
71, pressure pump 72 and injection pipe 73, the paint storage container 71 are connected with pressure pump 72, the pressure pump 72 and injection pipe
73 are connected, and the pressure pump 72 is connect with 4 signal of computer.When computer judges that test point with defect, can input letter
Number starting pressure pump 72 carries out spray painting label, so that the later period carries out specific aim maintenance.
As a preferred solution:
The vibration excitor 21 is Electrodynamic Vibrators, to realize automation and to adjust vibrational energy.
The microphone sensor 3 is mounted in pvc pipe, to guarantee that the sound wave source detected is to come from a direction,
Reduce detection interference.
In addition, being additionally provided with guiding mechanism 8 in the front end of track detection car 1, the directive wheel 81 and rail 9 of guiding mechanism 8 are constituted
Connection is rolled, guiding role is played with the driving direction to track detection car 1.
It is additionally provided with mobile power source 10 on track detection car 1, mobile power supply is carried out to described device to realize.
It is additionally provided with wireless network module 11 on track detection car 1, carries out nothing with remote terminal (not shown) to realize
Line communication connection.
It is additionally provided with locator (not shown), such as GPS locator, on track detection car 1 to acquire detected railway line
The location information on road.
It is additionally provided with video camera (not shown), on track detection car 1 with acquisition trajectory plate number information.
Track detection car 1 described in the utility model is equipped with force mechanisms 13 of voluntarily walking about, and is the prior art；In addition, this is practical
Novel described device can realize remote control detection operation.
Realize that the method for dynamic detection non-fragment orbit defect is as follows using the present embodiment described device:
Firstly, regulating sound wave excitation unit 2 and the lateral position of microphone sensor 3, the vertical height apart from track plates
Then the acquisition direction of degree and microphone sensor 3 sets the excited frequency of vibration excitor 21, start vibration excitor 21 to track plates
12 inputted vibration energy, the sound wave for making to generate within the scope of 10~20kHz of frequency (specifically can be by being arranged in 22 bottom end of exciting rod
Pressure sensor 23 control vibration pressure that exciting rod 22 applies track plates 12 within a preset range), and by Mike's hearsay
Sensor 3 acquires acoustic signals and is transferred to computer 4, is calculated acoustic velocity collected by computer 4 and is carried out with threshold values big
Small comparison to judge whether there is defect, specifically: if acquisition acoustic velocity be less than threshold values, judge existing defects；With valve
The difference of value is bigger, indicates that defect is more serious.
Because the spread speed of sound wave in solids is greater than the spread speed in gas, if track plates are defective, defect
The medium at place will be become gas from solid, thus sound wave in the spread speed ratio in defective concrete in healthy concrete
Spread speed it is slow, therefore using spread speed of the device described in the utility model detection sound wave in healthy concrete as threshold values,
By comparing the size between the velocity of wave and threshold values of detected sound wave, so that it may judge that test point whether there is defect, and according to inspection
The difference size between the velocity of wave and threshold values of sound wave is surveyed, can also further judge the size of defect, it may be assumed that get over the difference of threshold values
Greatly, defect is bigger or more serious.
In summary as it can be seen that the utility model realizes the dynamic detection to non-fragment orbit defect, fast with detection speed,
It is high-efficient, detection operation at a distance can be carried out in several hours Window times, and testing result is not substantially by external environment
It influences, detection accuracy is high, and defective locations can be marked simultaneously in favor of later maintenance maintenance, so that detection and maintenance work effect
Rate is greatly improved, and maintenance and powerful support in time can be provided for the safe operation of high-speed rail；Therefore, the utility model is opposite
In the prior art, there is marked improvement and application value.
It is last it is necessarily pointed out that: the foregoing is merely the preferable specific embodiments of the utility model, but this
The protection scope of utility model is not limited thereto, and anyone skilled in the art discloses in the utility model
In technical scope, any changes or substitutions that can be easily thought of, should be covered within the scope of the utility model.
Claims (10)
1. a kind of device of dynamic detection non-fragment orbit defect, it is characterised in that: excite unit, wheat including track detection car, sound wave
Gram wind sensor and computer, the sound wave excitation unit are connected with a pair of axial displacement regulating mechanism, Mike's wind sensing
Device is connected with an adaptive displacement feedback regulation device, and twin shaft displacement regulating mechanism and adaptive displacement feedback regulation
Device is fixedly connected in the front end of track detection car.
2. the apparatus according to claim 1, it is characterised in that: described device further includes flaw labeling mechanism, the defect
Marking mechanism includes paint storage container, pressure pump and injection pipe, and the paint storage container is connected with pressure pump, the pressure
Power pump is connected with injection pipe, and the pressure pump is connect with Computer signal.
3. the apparatus according to claim 1, it is characterised in that: the twin shaft displacement regulating mechanism includes that length travel is adjusted
Mechanism A and lateral displacement regulating mechanism A, the length travel regulating mechanism A include that longitudinal carrier A and longitudinal electric screw rod are adjusted
Mechanism A, the lateral displacement regulating mechanism A include horizontal support A and transverse electric screw rod regulating mechanism A, the longitudinal carrier A
Slide laterally and connect with horizontal support A, slidably connect mounting plate A on the longitudinal carrier A, the sound wave excitation unit with
Mounting plate A is fixedly connected, also, vertical deviation sensors A, the cross are equipped on the left or right side of the mounting plate A
The front end of track detection car is fixedly connected on to bracket A.
4. device according to claim 1 or 3, it is characterised in that: the sound wave excitation unit includes vibration excitor and exciting
Bar, the top of the exciting rod are fixedly connected with the output end of vibration excitor, and the bottom end of the exciting rod and a pressure sensor are solid
Fixed connection.
5. the apparatus according to claim 1, it is characterised in that: the adaptive displacement feedback regulation device includes mounting plate
B, length travel regulating mechanism B and lateral displacement regulating mechanism B, is installed with a rotary electric machine, the wheat on the mounting plate B
Gram wind sensor is fixedly mounted in the shaft of rotary electric machine；The length travel regulating mechanism B includes longitudinal carrier B and longitudinal direction
Electronic screw rod regulating mechanism B, the lateral displacement regulating mechanism B include horizontal support B and transverse electric screw rod regulating mechanism B,
The mounting plate B is slided up and down with longitudinal carrier B to be connect, and the longitudinal carrier B slides laterally with horizontal support B to be connect, described
Horizontal support B is fixedly connected on the front end of track detection car；Also, it is equipped on the left or right side of the mounting plate B vertical
Displacement sensor B.
6. the apparatus according to claim 1, it is characterised in that: be additionally provided with guiding mechanism in the front end of track detection car, constitute
The directive wheel and rail of guiding mechanism, which roll, to be connected.
7. the apparatus according to claim 1, it is characterised in that: be additionally provided with mobile power source on track detection car.
8. the apparatus according to claim 1, it is characterised in that: be additionally provided with wireless network module on track detection car.
9. the apparatus according to claim 1, it is characterised in that: be additionally provided with locator on track detection car.
10. the apparatus according to claim 1, it is characterised in that: be additionally provided with video camera on track detection car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821626929.5U CN208868063U (en) | 2018-10-08 | 2018-10-08 | A kind of device of dynamic detection non-fragment orbit defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821626929.5U CN208868063U (en) | 2018-10-08 | 2018-10-08 | A kind of device of dynamic detection non-fragment orbit defect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208868063U true CN208868063U (en) | 2019-05-17 |
Family
ID=66469575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821626929.5U Active CN208868063U (en) | 2018-10-08 | 2018-10-08 | A kind of device of dynamic detection non-fragment orbit defect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208868063U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109249955A (en) * | 2018-10-08 | 2019-01-22 | 上海工程技术大学 | A kind of method and device of dynamic detection non-fragment orbit defect |
| CN110481594A (en) * | 2019-09-21 | 2019-11-22 | 武汉拓帆轨道交通科技股份有限公司 | A kind of rail clip repair apparatus and its repair method |
| CN113581245A (en) * | 2021-08-09 | 2021-11-02 | 上海应用技术大学 | Automatic detection system for track slab hidden diseases |
-
2018
- 2018-10-08 CN CN201821626929.5U patent/CN208868063U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109249955A (en) * | 2018-10-08 | 2019-01-22 | 上海工程技术大学 | A kind of method and device of dynamic detection non-fragment orbit defect |
| CN109249955B (en) * | 2018-10-08 | 2023-11-03 | 上海工程技术大学 | Method and device for dynamically detecting ballastless track defects |
| CN110481594A (en) * | 2019-09-21 | 2019-11-22 | 武汉拓帆轨道交通科技股份有限公司 | A kind of rail clip repair apparatus and its repair method |
| CN113581245A (en) * | 2021-08-09 | 2021-11-02 | 上海应用技术大学 | Automatic detection system for track slab hidden diseases |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208868063U (en) | A kind of device of dynamic detection non-fragment orbit defect | |
| CN109249955A (en) | A kind of method and device of dynamic detection non-fragment orbit defect | |
| CN207159724U (en) | A kind of railroad tie detection repairing robot | |
| CN101196424A (en) | On-line checkout equipment for contact pressure of motorcycle pantograph | |
| CN207528189U (en) | A kind of multi-functional nondestructive detection system of ballastless track of high-speed railway | |
| CN106379376A (en) | on-line rail state monitoring method based on vibration and positioning monitoring | |
| CN111024816A (en) | Suspension detection system and impulse response detection method | |
| CN208881811U (en) | A kind of automatic inspection device for track | |
| CN109164174A (en) | A kind of method and device of II plate-type non-fragment orbit off-seam of Dynamic Non-Destruction Measurement CRTS | |
| CN104742937B (en) | Track operational process dynamic state of parameters detection platform | |
| CN111560939A (en) | Track and roadbed deviation monitoring device and method | |
| CN104142135B (en) | Method and device for monitoring horizontal displacement of tunnel based on wireless tilt sensors | |
| CN201457413U (en) | Device for protecting measuring wheel or guide wheel of track examination instrument | |
| CN102661821B (en) | Dynamic monitor for ballast bed and method | |
| CN201772870U (en) | Digital track space measuring device | |
| CN102042810B (en) | Laser thickness measuring device of down-draft sintering material layer | |
| CN208888186U (en) | A kind of device of multichannel Dynamic Non-Destruction Measurement non-fragment orbit defect | |
| CN208171235U (en) | A kind of underground railway track detection device | |
| CN104236493B (en) | Fully-mechanized mining working descending amount of piston monitoring device and method | |
| CN103255689A (en) | Ballastless track bed plate elevation rapid inspection vehicle | |
| CN215572684U (en) | Device for measuring distance between railroad engineering sleepers | |
| CN208999359U (en) | A kind of device of II plate-type non-fragment orbit off-seam of Dynamic Non-Destruction Measurement CRTS | |
| CN211844442U (en) | Signal acquisition device based on ultrasonic lamb wave plate type ballastless track crack detection | |
| CN202433072U (en) | Weighing structure assembly for detecting overload and offset load | |
| CN203753173U (en) | Track operation dynamic detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |