CN109164173B - Method and device for dynamically and nondestructively detecting ballastless track defects in multiple channels - Google Patents
Method and device for dynamically and nondestructively detecting ballastless track defects in multiple channels Download PDFInfo
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- CN109164173B CN109164173B CN201811167721.6A CN201811167721A CN109164173B CN 109164173 B CN109164173 B CN 109164173B CN 201811167721 A CN201811167721 A CN 201811167721A CN 109164173 B CN109164173 B CN 109164173B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/103—Number of transducers one emitter, two or more receivers
Abstract
The invention discloses a method and a device for dynamically and nondestructively detecting ballastless track defects in multiple channels, wherein the method comprises the steps of firstly enabling an ultrasonic pulse transmitting and receiving device to generate ultrasonic signals with the frequency within the range of 20-100 kHz, transmitting the ultrasonic signals into the ballastless track through an air coupling ultrasonic transducer, then collecting reflected echo signals through a plurality of air coupling ultrasonic transducers, transmitting the reflected echo signals to the ultrasonic pulse transmitting and receiving device, transmitting the received reflected echo signals to a signal amplifier through the ultrasonic pulse transmitting and receiving device, amplifying the amplified reflected echo signals, transmitting the amplified reflected echo signals to a computer, and judging whether defects exist according to the amplitude of the obtained reflected echo and the arrival time of the reflected echo after filtering and denoising processing are carried out on the reflected echo signals through MATLAB software by the computer. The method can efficiently, nondestructively and real-timely detect the defects of the ballastless track, and can provide timely early warning and powerful guarantee for the safe operation of the high-speed rail.
Description
Technical Field
The invention relates to a method and a device for dynamically and nondestructively detecting ballastless track defects through multiple channels, and belongs to the technical field of nondestructive detection of tracks.
Background
Based on the advantages of high speed, strong transportation capacity, safety, punctual time and the like of the high-speed railway, the high-speed railway becomes one of public transportation modes which are greatly developed in China, and the railway high-speed, particularly passenger railway high-speed, is a development trend in the future. Along with the rapid development of high-speed railways, the ballastless track is taken as a main track structure and consists of a ballastless track plate, a CA mortar layer, a supporting layer and a foundation bed, and the application range of the ballastless track is wider and wider. In recent years, however, high-speed railway understructure has developed more and more defects including defects such as offline structural relief, penetration cracks, and CA mortar layer void. On one hand, the ballastless track can be extruded, impacted and the like in the high-speed heavy-load running process of the train, so that various defects such as incompact, cracks or hollows can occur in the ballastless track, and a damaged layer or a honeycomb hemp layer is formed outside the ballastless track; on the other hand, the ballastless track has defects due to possible problems of construction process and construction experience in the earlier stage of manufacture; in addition, defects may occur in natural disasters such as erosion by rain and snow, changes in ambient temperature, and the like. The existence of the defects seriously affects the bearing capacity and durability of the ballastless track, the ballastless track structure can be disabled, the stability and smoothness of the ballastless track and the off-line structure of the high-speed railway can not be ensured, and the stability and smoothness are just important preconditions for ensuring the rapid and safe operation of the high-speed railway, and are directly related to the normal operation of the train and the personal safety of passengers.
However, at present, the defect detection of ballastless tracks in China mainly depends on a manual static detection technology, because the effective skylight time for line maintenance is only 2-3 hours, and the threads of a high-speed railway are very long, if the existing detection means are adopted, a large amount of manpower and material resources are consumed, the efficiency is very low, and the detection and maintenance cost is very high, so that the requirement of track safety early warning cannot be met, therefore, the development of a method and a device for efficiently and dynamically detecting the defect of the ballastless tracks in a nondestructive mode have important significance and value.
Disclosure of Invention
Aiming at the problems and the demands of the prior art, the invention aims to provide a method and a device for dynamically and nondestructively detecting the defects of a ballastless track in a multichannel manner so as to realize efficient, nondestructively and real-time detection of the defects of the ballastless track and provide timely early warning and powerful guarantee for safe operation of high-speed rails.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for dynamically and nondestructively detecting the defect of a ballastless track in multiple channels includes such steps as generating ultrasonic signals with frequency in 20-100 kHz by ultrasonic pulse emitting and receiving unit, transmitting them to the ballastless track by an air-coupled ultrasonic transducer, collecting reflected echo signals by multiple air-coupled ultrasonic transducers, transmitting them to ultrasonic pulse emitting and receiving unit, amplifying the received reflected echo signals by ultrasonic pulse emitting and receiving unit, transmitting them to computer, filtering and denoising by MATLAB software, and judging if there is a defect according to the amplitude of the reflected echo and the arrival time of the reflected echo, and features that: if the amplitude of the reflected echo is relatively large and the arrival time is relatively short, judging that the defect exists.
A device for dynamically detecting ballastless track defects in multiple channels comprises a track inspection trolley, multiple channels of ultrasonic pulse emitting and receiving devices and a computer, wherein the multiple channels of ultrasonic pulse emitting and receiving devices are arranged on the track inspection trolley; the method is characterized in that: the system comprises a multi-channel ultrasonic pulse transmitting receiver, a multi-channel ultrasonic pulse receiving receiver, an air coupling ultrasonic transmitting transducer, a plurality of air coupling ultrasonic receiving transducers and a signal amplifier, wherein the air coupling ultrasonic transmitting transducer is in signal connection with a transmitting interface of the multi-channel ultrasonic pulse transmitting receiver; and the air coupling ultrasonic transmitting transducer is connected with a self-adaptive displacement feedback regulating device, a plurality of air coupling ultrasonic receiving transducers are uniformly arranged on the annular support, the annular support is connected with a double-shaft displacement regulating mechanism, and the self-adaptive displacement feedback regulating device and the double-shaft displacement regulating mechanism are fixedly connected to the front end of the rail inspection trolley.
An implementation scheme is that the self-adaptive displacement feedback adjusting device comprises a mounting plate A, wherein a rotating motor is fixedly arranged on the mounting plate A, and the air coupling ultrasonic emission transducer is fixedly arranged on a rotating shaft of the rotating motor; two bilaterally symmetrical laser displacement sensors are arranged on the air coupling ultrasonic emission transducer and are fixedly connected with a connecting seat, and the connecting seat is fixedly connected with a rotating shaft of a rotating motor; and a vertical displacement sensor A is arranged on the left or right side surface of the mounting plate A, the mounting plate A is in sliding connection with a longitudinal displacement adjusting mechanism A, and the longitudinal displacement adjusting mechanism A is in sliding connection with a transverse displacement adjusting mechanism A.
In one embodiment, the dual-shaft displacement adjusting mechanism comprises a longitudinal displacement adjusting mechanism B and a transverse displacement adjusting mechanism B, wherein the longitudinal displacement adjusting mechanism B is in sliding connection with the transverse displacement adjusting mechanism B, the circular support is fixedly connected with a mounting plate B through a connecting arm, the mounting plate B is in sliding connection with the longitudinal displacement adjusting mechanism B, and a vertical displacement sensor B is mounted on the left side surface or the right side surface of the mounting plate B.
In a further embodiment, the longitudinal displacement adjusting mechanism A/B comprises a longitudinal support A/B and a longitudinal electric screw adjusting mechanism A/B, the transverse displacement adjusting mechanism A/B comprises a transverse support A/B and a transverse electric screw adjusting mechanism A/B, the mounting plate A/B is connected with the longitudinal support A/B in a vertical sliding mode, the longitudinal support A/B is connected with the transverse support A/B in a transverse sliding mode, and the transverse support A/B is fixedly connected with the front end of the trolley for on-track inspection.
In a further embodiment, the longitudinal electric screw rod adjusting mechanism A/B and the transverse electric screw rod adjusting mechanism A/B are respectively composed of a driving motor, a screw rod with one end fixed at the output end of the driving motor and a sliding block connecting piece in threaded connection with the screw rod.
In one preferable scheme, the front end of the rail inspection trolley is also provided with a guide mechanism, and a guide wheel forming the guide mechanism is in rolling connection with the steel rail.
A preferable scheme is that a mobile power supply is further arranged on the rail inspection trolley.
In one preferred scheme, the rail inspection trolley is also provided with a wireless network module.
In one preferred scheme, a locator is further arranged on the rail inspection trolley.
In one preferred scheme, a camera is further arranged on the rail inspection trolley.
Compared with the prior art, the invention has the following beneficial technical effects:
1) The adopted air coupling ultrasonic transmitting transducer and air coupling ultrasonic receiving transducer not only do not pollute the track, but also realize non-contact nondestructive detection;
2) The dynamic detection of one transmitter and multiple receivers is realized, the rapid scanning detection of the whole line can be realized, the detection efficiency is high, and the characteristic of short time of maintenance and skylight in rail transit overhaul can be satisfied;
3) In particular, a plurality of receiving transducers are used for collecting the reflected echo signals, so that the received reflected echoes are overlapped, the radiation energy in one direction is maximum, and the total radiation energy in other directions is smaller, thereby realizing the focusing effect on the signals, enhancing the useful reflected echo signals, inhibiting the interference signals and further ensuring the accuracy of detection results;
in conclusion, the method can realize high-efficiency, nondestructive, accurate and real-time detection of the ballastless track defects, can provide timely early warning and powerful guarantee for safe operation of high-speed rails, and can provide powerful support for subsequent track maintenance work; therefore, compared with the prior art, the invention has obvious progress and application value.
Drawings
FIG. 1 is a schematic perspective view of an apparatus for dynamically and nondestructively detecting defects of a ballastless track with multiple channels according to an embodiment;
FIG. 2 is a state diagram of an apparatus for detecting operation according to an embodiment;
fig. 3 is a functional block diagram of the device according to the embodiment.
The reference numerals in the figures are shown below: 1. rail inspection trolley; 2. a multichannel ultrasonic pulse transmitting and receiving device; 3. a computer; 4. an air-coupled ultrasonic transmitting transducer; 5. an air-coupled ultrasonic receiving transducer; 6. a signal amplifier; 7. an adaptive displacement feedback adjustment device; 71. a mounting plate A; 72. a rotating motor; 73. a laser displacement sensor; 74. a connecting seat; 75. a vertical displacement sensor A; 76. a longitudinal displacement adjusting mechanism A; 761. a longitudinal bracket A; 762. a longitudinal electric screw rod adjusting mechanism A; 77. a transverse displacement adjusting mechanism A; 771. a transverse bracket A; 772. a transverse electric screw rod adjusting mechanism A; 8. a circular ring-shaped bracket; 9. a biaxial displacement adjusting mechanism; 91. a longitudinal displacement adjusting mechanism B; 911. a longitudinal bracket B; 912. a longitudinal electric screw rod adjusting mechanism B; 92. a lateral displacement adjusting mechanism B; 921. a transverse bracket B; 922. a transverse electric screw rod adjusting mechanism B; 93. a mounting plate B; 94. a connecting arm; 95. a vertical displacement sensor B; 10. a guide mechanism; 101. a guide wheel; 11. a steel rail; 12. a mobile power supply; 13. a wireless network module; 14. a positioner; 15. a camera; 16. a track plate; 17. a remote terminal; 18. a self-walking power mechanism; 19. and (5) a seat.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and the examples.
Examples
Please refer to fig. 1 and 2: the device for dynamically detecting the ballastless track defects through multiple channels comprises a track inspection trolley 1, a multiple-channel ultrasonic pulse transmitting receiver 2 and a computer 3, wherein the multiple-channel ultrasonic pulse transmitting receiver 2 and the computer 3 are arranged on the track inspection trolley 1; the device is characterized by further comprising an air coupling ultrasonic transmitting transducer 4, a plurality of air coupling ultrasonic receiving transducers 5 and a signal amplifier 6, wherein the air coupling ultrasonic transmitting transducer 4 is connected with an adaptive displacement feedback regulating device 7, the plurality of air coupling ultrasonic receiving transducers 5 are uniformly arranged on a circular support 8, the circular support 8 is connected with a double-shaft displacement regulating mechanism 9, and the adaptive displacement feedback regulating device 7 and the double-shaft displacement regulating mechanism 9 are fixedly connected to the front end of the track inspection trolley 1.
In this embodiment:
the self-adaptive displacement feedback adjusting device 7 comprises an installation plate A71, a rotating motor 72 is fixedly arranged on the installation plate A71, and the air coupling ultrasonic transmitting transducer 4 is fixedly arranged on a rotating shaft of the rotating motor 72; two bilaterally symmetrical laser displacement sensors 73 are mounted on the air coupling ultrasonic emission transducer 4, the two bilaterally symmetrical laser displacement sensors 73 are fixedly connected with a connecting seat 74, and the connecting seat 74 is fixedly connected with a rotating shaft of the rotating motor 72; further, a vertical displacement sensor a 75 is mounted on the left or right side surface of the mounting plate a 71, the mounting plate a 71 is slidably connected to a longitudinal displacement adjustment mechanism a76, and the longitudinal displacement adjustment mechanism a76 is slidably connected to a lateral displacement adjustment mechanism a 77, specifically: the longitudinal displacement adjusting mechanism A76 comprises a longitudinal support A761 and a longitudinal electric screw adjusting mechanism A762, the transverse displacement adjusting mechanism A77 comprises a transverse support A771 and a transverse electric screw adjusting mechanism A772, the mounting plate A71 is connected with the longitudinal support A761 in a vertical sliding mode, the longitudinal support A761 is connected with the transverse support A771 in a transverse sliding mode, and the transverse support A771 is fixedly connected to the front end of the rail inspection trolley 1.
The inclination of the air-coupled ultrasonic emission transducer 4 can be determined by the displacement difference detected by the two bilaterally symmetrical laser displacement sensors 73 mounted on the air-coupled ultrasonic emission transducer 4, for example: if the displacement value detected by the laser displacement sensor 73 on the left side is smaller than the displacement value detected by the laser displacement sensor 73 on the right side, it can be determined that the air-coupled ultrasonic emission transducer 4 is tilted to the left, and at this time, the tilt angle of the air-coupled ultrasonic emission transducer 4 can be adjusted by adjusting the rotation motor 72 to rotate clockwise, so that the emission end face of the air-coupled ultrasonic emission transducer 4 is adjusted to be kept within a preset angle range with the surface of the track plate 16.
In addition, the vertical distance between the transmitting end face of the air-coupled ultrasonic transmitting transducer 4 and the surface of the track plate 16 can be kept within a preset range by the vertical displacement sensor a 75 and the longitudinal displacement adjusting mechanism a 76.
The double-shaft displacement adjusting mechanism 9 comprises a longitudinal displacement adjusting mechanism B91 and a transverse displacement adjusting mechanism B92, the longitudinal displacement adjusting mechanism B91 comprises a longitudinal bracket B911 and a longitudinal electric screw adjusting mechanism B912, the transverse displacement adjusting mechanism B92 comprises a transverse bracket B921 and a transverse electric screw adjusting mechanism B922, the transverse bracket B921 is fixedly connected to the front end of the track inspection trolley 1, the longitudinal bracket B911 is transversely and slidably connected with the transverse bracket B921, a mounting plate B93 is slidably connected to the longitudinal bracket B911, a connecting arm 94 is fixedly connected to the mounting plate B93, the circular bracket 8 is fixed on the connecting arm 94, and the receiving end faces of a plurality of air-coupled ultrasonic receiving transducers 5 uniformly arranged on the circular bracket 8 are always kept perpendicular to the ballastless track surface; further, a vertical displacement sensor B95 is mounted on the left or right side surface of the mounting plate B93.
The vertical distance between the receiving end surfaces of the plurality of air-coupled ultrasonic receiving transducers 5 and the surface of the track plate 16 can be maintained within a preset range by the vertical displacement sensor B95 and the longitudinal displacement adjustment mechanism B91.
In addition, the distance between the air-coupled ultrasonic transmitting transducer 4 and the plurality of air-coupled ultrasonic receiving transducers 5 can be adjusted by the lateral displacement adjustment mechanism a 77 and the lateral displacement adjustment mechanism B92 to adjust the range of detection per scan.
The longitudinal electric screw rod adjusting mechanism A762, the transverse electric screw rod adjusting mechanism A772, the longitudinal electric screw rod adjusting mechanism B912 and the transverse electric screw rod adjusting mechanism B922 are all composed of a driving motor, a screw rod with one end fixed at the output end of the driving motor and a sliding block connecting piece in threaded connection with the screw rod, and the component structures are known technologies and are not shown in detail in the drawings.
The front end of the rail inspection trolley 1 is also provided with a guide mechanism 10, and a guide wheel 101 forming the guide mechanism 10 is in rolling connection with a steel rail 11 so as to play a role in guiding the running direction of the rail inspection trolley 1.
In addition, a mobile power supply 12 is further arranged on the rail inspection trolley 1 so as to realize mobile power supply to the device.
A wireless network module 13 is further provided on the rail inspection trolley 1 to realize wireless communication connection with a remote terminal (not shown in the figure).
A locator 14, such as a GPS locator, is also provided on the rail inspection trolley 1 to collect positional information of the inspected rail line.
A camera 15 is also arranged on the rail inspection trolley 1 to collect rail plate number information.
Please refer to fig. 3: the transmitting interface of the multichannel ultrasonic pulse transmitting and receiving device 2 is in signal connection with the air coupling ultrasonic transmitting transducer 4, the air coupling ultrasonic receiving transducers 5 are in one-to-one signal connection with the receiving interfaces of the multichannel ultrasonic pulse transmitting and receiving device 2, the multichannel ultrasonic pulse transmitting and receiving device 2 is in signal connection with the signal amplifier 6, the signal amplifier 6 is in signal connection with the computer 3, the computer 3 is in communication connection with the wireless network module 13, the wireless network module 13 is in wireless communication connection with the remote terminal 17, and the locator 14 and the camera 15 are in signal connection with the computer 3.
The method for realizing the multi-channel dynamic nondestructive testing of the ballastless track defects by adopting the device disclosed by the embodiment comprises the following steps:
firstly, an ultrasonic wave pulse transmitting and receiving device 2 generates an ultrasonic wave signal with the frequency in the range of 20-100 kHz, an air coupling ultrasonic transmitting transducer 4 transmits the ultrasonic wave signal into a ballastless track, a plurality of air coupling ultrasonic receiving transducers 5 collect reflected echo signals and transmit the reflected echo signals to the ultrasonic wave pulse transmitting and receiving device 2, the ultrasonic wave pulse transmitting and receiving device 2 transmits the received reflected echo signals to a signal amplifier 6 for amplification and then transmits the amplified reflected echo signals to a computer 3, and after filtering and denoising the reflected echo signals by adopting MATLAB software by the computer 3, whether defects exist or not is judged according to the obtained amplitude of the reflected echo and the arrival time of the reflected echo, specifically comprising the following steps: if the amplitude of the reflected echo is relatively large and the arrival time is relatively short, judging that the defect exists.
Because of the different propagation speeds of ultrasonic waves in media with different densities, reflection, refraction and the like can occur when the ultrasonic waves pass through interfaces of two different media. Under the condition that the ballastless track has defects such as hole cracks, the defect part is an air or vacuum gas medium, and the defect-free part is a concrete solid medium, so when ultrasonic waves propagate into the ballastless track at a certain speed, the ultrasonic waves meeting the defects are directly reflected back, and the ultrasonic waves not meeting the defects are transmitted to the bottom of the ballastless track and then reflected back. Therefore, when the ultrasonic waves encounter the defect, the acquired reflected echo of the defect is short in arrival time and large in amplitude; when the ultrasonic wave does not meet the defect, the acquired reflection echo at the defect-free position has smaller time length and amplitude. Therefore, by comparing the amplitude of the received reflected echo with the time-out, it can be judged whether or not a defect exists.
In addition, because the ballastless track belongs to a concrete member and is a porous non-uniform composite material formed by mixing sand, cement, stones and the like, ultrasonic waves are scattered to a certain extent when being transmitted in the concrete, the acquired echo signals are attenuated to a certain extent, if the echo signals are directly used, whether defects exist or not is difficult to judge, and the accuracy of detection results is influenced; the invention uses a plurality of air coupling ultrasonic receiving transducers 5 to be uniformly distributed at the detection position in 360 degrees, so that the collected reflected echo is overlapped, the radiation energy in one direction is maximum, the total radiation energy in other directions is smaller, the focusing effect on echo signals is realized, the useful reflected echo signals are enhanced, the interference signals are suppressed, and the accuracy of the detection result is ensured.
The rail inspection trolley 1 is provided with a self-walking power mechanism 18, which is the prior art; in addition, the device can realize remote control detection operation, and a seat 19 can be arranged on the rail inspection trolley 1, so that a detector sits on the rail inspection trolley 1 to manually perform detection operation.
In conclusion, the method can realize high-efficiency, nondestructive, accurate and real-time detection of the ballastless track defects, can provide timely early warning and powerful protection for safe operation of high-speed rails, and can provide powerful support for subsequent track maintenance work; therefore, compared with the prior art, the invention has obvious progress and application value.
Finally, it is necessary to point out here that: the foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for dynamically and nondestructively detecting ballastless track defects in multiple channels comprises a track inspection trolley, multiple channels of ultrasonic pulse emitting and receiving devices and a computer, wherein the multiple channels of ultrasonic pulse emitting and receiving devices are arranged on the track inspection trolley; the method is characterized in that: the system comprises a multi-channel ultrasonic pulse transmitting receiver, a multi-channel ultrasonic pulse receiving receiver, an air coupling ultrasonic transmitting transducer, a plurality of air coupling ultrasonic receiving transducers and a signal amplifier, wherein the air coupling ultrasonic transmitting transducer is in signal connection with a transmitting interface of the multi-channel ultrasonic pulse transmitting receiver; the air coupling ultrasonic transmitting transducers are connected with a self-adaptive displacement feedback regulating device, the air coupling ultrasonic receiving transducers are uniformly arranged on the annular support, the annular support is connected with a double-shaft displacement regulating mechanism, and the self-adaptive displacement feedback regulating device and the double-shaft displacement regulating mechanism are fixedly connected to the front end of the rail inspection trolley; the self-adaptive displacement feedback adjusting device comprises an installing plate A, wherein a rotating motor is fixedly arranged on the installing plate A, and the air coupling ultrasonic transmitting transducer is fixedly arranged on a rotating shaft of the rotating motor; two bilaterally symmetrical laser displacement sensors are arranged on the air coupling ultrasonic emission transducer and are fixedly connected with a connecting seat, and the connecting seat is fixedly connected with a rotating shaft of a rotating motor; the left side surface or the right side surface of the mounting plate A is provided with a vertical displacement sensor A, the mounting plate A is in sliding connection with a longitudinal displacement adjusting mechanism A, and the longitudinal displacement adjusting mechanism A is in sliding connection with a transverse displacement adjusting mechanism A; the method comprises the steps of firstly enabling an ultrasonic pulse transmitting and receiving device to generate ultrasonic signals with the frequency within the range of 20-100 kHz, transmitting the ultrasonic signals to the interior of a ballastless track through an air coupling ultrasonic transducer, collecting reflected echo signals through a plurality of air coupling ultrasonic transducers, transmitting the reflected echo signals to the ultrasonic pulse transmitting and receiving device, transmitting the received reflected echo signals to a signal amplifier through the ultrasonic pulse transmitting and receiving device, amplifying the amplified reflected echo signals, transmitting the amplified reflected echo signals to a computer, filtering and denoising the reflected echo signals through MATLAB software through the computer, and judging whether defects exist according to the obtained amplitude of the reflected echo and the arrival time of the reflected echo, wherein the method comprises the following steps of: if the amplitude of the reflected echo is relatively large and the arrival time is relatively short, judging that the defect exists.
2. The method according to claim 1, characterized in that: the vertical displacement adjustment mechanism A comprises a vertical support A and a vertical electric screw rod adjustment mechanism A, the horizontal displacement adjustment mechanism A comprises a horizontal support A and a horizontal electric screw rod adjustment mechanism A, the mounting plate A is connected with the vertical support A in a vertical sliding manner, the vertical support A is connected with the horizontal support A in a horizontal sliding manner, and the horizontal support A is fixedly connected with the front end of the rail inspection trolley.
3. The method according to claim 1, characterized in that: the double-shaft displacement adjusting mechanism comprises a longitudinal displacement adjusting mechanism B and a transverse displacement adjusting mechanism B, wherein the longitudinal displacement adjusting mechanism B is in sliding connection with the transverse displacement adjusting mechanism B, the circular support is fixedly connected with a mounting plate B through a connecting arm, the mounting plate B is in sliding connection with the longitudinal displacement adjusting mechanism B, and a vertical displacement sensor B is mounted on the left side surface or the right side surface of the mounting plate B.
4. A method according to claim 3, characterized in that: the vertical displacement adjustment mechanism B comprises a vertical support B and a vertical electric screw rod adjustment mechanism B, the horizontal displacement adjustment mechanism B comprises a horizontal support B and a horizontal electric screw rod adjustment mechanism B, the mounting plate B is connected with the vertical support B in a vertical sliding mode, the vertical support B is connected with the horizontal support B in a horizontal sliding mode, and the horizontal support B is fixedly connected with the front end of the rail inspection trolley.
5. The method according to claim 1, characterized in that: the front end of the rail inspection trolley is also provided with a guide mechanism, and a guide wheel forming the guide mechanism is in rolling connection with the steel rail.
6. The method according to claim 1, characterized in that: the rail inspection trolley is also provided with a mobile power supply.
7. The method according to claim 1, characterized in that: and a wireless network module is also arranged on the track inspection trolley.
8. The method according to claim 1, characterized in that: the rail inspection trolley is also provided with a locator and a camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811167721.6A CN109164173B (en) | 2018-10-08 | 2018-10-08 | Method and device for dynamically and nondestructively detecting ballastless track defects in multiple channels |
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| CN201811167721.6A CN109164173B (en) | 2018-10-08 | 2018-10-08 | Method and device for dynamically and nondestructively detecting ballastless track defects in multiple channels |
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| CN109164173A CN109164173A (en) | 2019-01-08 |
| CN109164173B true CN109164173B (en) | 2023-11-21 |
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| CN110687206B (en) * | 2019-11-06 | 2022-06-03 | 石家庄铁道大学 | Ballastless track functional layer defect imaging method |
| CN111307945B (en) * | 2020-04-09 | 2023-07-21 | 上海工程技术大学 | Imaging method and device for detecting ballastless track near-surface defects based on ultrasonic array |
| CN111323485A (en) * | 2020-04-09 | 2020-06-23 | 上海工程技术大学 | Imaging method and device for detecting internal defects of track slab |
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