CN210063006U - Broken rail monitoring system - Google Patents
Broken rail monitoring system Download PDFInfo
- Publication number
- CN210063006U CN210063006U CN201920597369.3U CN201920597369U CN210063006U CN 210063006 U CN210063006 U CN 210063006U CN 201920597369 U CN201920597369 U CN 201920597369U CN 210063006 U CN210063006 U CN 210063006U
- Authority
- CN
- China
- Prior art keywords
- rail
- optical fiber
- monitoring system
- switch
- fbg sensor
- 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
Images
Abstract
The utility model discloses a broken rail monitoring system, including monitoring unit and first optic fibre, monitoring unit passes through structural bonding agent bonding on one side web of switch rail, monitoring unit includes a plurality of first FBG sensors of group and a plurality of first optic fibre sections of group; the first optical fiber sections are respectively arranged between two adjacent groups of the first FBG sensors, a fixture is arranged on the switch rail, and the attaching section of the fixture is abutted against one side of each first FBG sensor; one end of the monitoring unit is in signal connection with one end of the first optical fiber. The utility model discloses utilize fiber grating sensing technology, realized the real-time broken rail monitoring to the switch blade of switch district section, improved monitoring system's stability through structure adhesive and fixture, this monitoring system satisfies various complicated electrical connection environment.
Description
Technical Field
The utility model belongs to the technical field of rail transit safety monitoring, in particular to broken rail monitoring system.
Background
The rail breakage seriously harms the driving safety, and is one of the major hidden troubles of driving accidents. At present, two common modes are used for checking the fracture condition of a steel rail: firstly, a rail breaking mode is checked through a rail circuit; the other is a mode of detecting broken rails by a steel rail flaw detection inspection instrument.
In the method of checking rail breakage by a track circuit, as shown in fig. 1, the track circuit uses a steel rail as a signal transmission conductor, and transmits a signal at a transmitting end on the steel rail side and receives a signal at a receiving end on the steel rail side. When the steel rail is electrically disconnected, the receiving end of the track circuit is in a no-signal state or receives a very low voltage signal to reflect the state of the occupied line, and whether the section of the steel rail is broken or not can be judged by checking faults according to the principle of 'fault-safety' of signal equipment.
The rail breakage mode is detected by a rail flaw detection instrument, and the rail flaw detector is used for detecting dark flaws inside a steel rail or fine cracks on the surface of the steel rail, particularly the flaws of a part of the steel rail covered by a clamping plate. According to the working principle of flaw detection, the method is divided into two categories of electromagnetic flaw detection and ultrasonic flaw detection. Ultrasonic flaw detectors are widely used in China railways. Ultrasonic waves can propagate from different velocities in solids and liquids, but hardly in air. When ultrasonic waves are incident on a rail having a nuclear, crack or other damage, the contact cross section between the solid and the air is blocked, and a reflected wave is generated. The flaw existing in the steel rail can be found through receiving and displaying by an electronic instrument. The depth of the flaw can also be judged according to the time interval between the transmitted wave and the reflected wave and the propagation speed of the reflected wave in the steel rail. The damaged rail is divided into three categories of light damage, light damage with development and heavy damage according to the regulations. The heavy-damaged steel rail must be replaced immediately, and the light-damaged steel rail should be marked for reinforced inspection at any time.
However, as the electrical connection of the switch section is complicated, as shown in fig. 2, the switch jumper of the switch section makes the rail electrically connected to the rail, and the metal slide plate at the bottom of the switch rail makes the switch blade electrically connected to the stock rail. When the switch section is broken, especially when the switch point part is broken, the electric signal can detour through the metal slide plate or the switch jumper wire, so that the receiving end of the track circuit can still receive the signal, and the switch point of the switch section cannot be subjected to broken rail inspection through the way of inspecting the broken rail through the track circuit. And moreover, the steel rail flaw detection tester cannot realize real-time monitoring, the time period for carrying out turnout flaw detection by using the steel rail flaw detection tester is uncertain in railway related departments, and the condition that the steel rail is broken during two times of steel rail flaw detection cannot be known in time.
In order to realize the real-time monitoring of the rail break condition of the switch rail, the prior art proposes that the rail break monitoring is carried out by utilizing the fiber grating sensing technology, but because the installation requirements of the optical fiber and the grating sensor are high, and in the prior art, the optical fiber and the grating sensor are bonded on the rail by utilizing epoxy resin, the stability of the monitoring system structure is low, and under the conditions that the temperature change is large day and night and the switch movement of the switch rail is frequent, the optical fiber and the grating sensor are easy to fall off from the rail, so that the monitoring system can not normally monitor the rail break condition.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the utility model provides a broken rail monitoring system, which comprises a monitoring unit and a first optical fiber,
the monitoring unit is bonded on the rail waist on one side of the switch rail through structural adhesive and comprises a plurality of groups of first FBG sensors and a plurality of groups of first optical fiber sections;
the first optical fiber sections are respectively arranged between two adjacent groups of the first FBG sensors, a fixture is arranged on the switch rail, and the attaching section of the fixture is abutted against one side of each first FBG sensor;
one end of the monitoring unit is connected with one end of the first optical fiber.
Further, one side of the first optical fiber section is attached to one side of the rail web of the switch rail.
Further, a connecting line of the first optical fiber section and the first FBG sensor is parallel to the central axis of the rail web on one side of the switch rail.
Further, the monitoring system further comprises a second FBG sensor, an optical demodulation module, a broken rail diagnosis module and a display module.
Further, the second FBG sensor is mounted on the first optical fiber.
Further, the other end of the first optical fiber is connected with the optical demodulation module.
Further, the second FBG sensor is mounted on a second optical fiber.
Further, one end of the second optical fiber is connected with the optical demodulation module.
Furthermore, the optical demodulation module is connected with a rail breakage diagnosis module, and the rail breakage diagnosis module is connected with the display module.
Furthermore, the fixture further comprises a supporting section, a first connecting section, a second connecting section, a third connecting section, a fourth connecting section and a fifth connecting section.
The utility model discloses utilize fiber grating sensing technology, realized the real-time broken rail monitoring to the switch blade of switch district section, improved monitoring system's stability through structure adhesive and fixture, this monitoring system satisfies various complicated electrical connection environment.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art track break detection using a track circuit;
FIG. 2 is a schematic diagram of the electrical connection scenario of a switch section in the prior art;
fig. 3 shows a side cross-sectional view of the point rail monitoring system according to the present invention;
figure 4 shows a schematic view of the structure of a fixture according to the invention;
fig. 5 shows a schematic of the monitoring system in single fiber mode according to the present invention;
fig. 6 shows a schematic of the monitoring system in dual fiber mode according to the present invention;
FIG. 7 is a schematic diagram of a fiber grating sensor in the prior art;
FIG. 8 is a schematic diagram illustrating a scenario in which a point rail is broken and an optical fiber is broken in a single fiber mode according to the present invention;
fig. 9 shows a schematic view of a situation in which the point rail is broken and the optical fiber is not broken in the single optical fiber mode according to the present invention.
In the figure: the device comprises a stock rail 1, a switch rail 2, a fixture 3, a bonding section 301, a supporting section 302, a first connecting section 303, a second connecting section 304, a third connecting section 305, a fourth connecting section 306, a fifth connecting section 307, a first FBG sensor 4, a structural adhesive 5, a second FBG sensor 6, a first optical fiber 7, a first optical fiber 701, a second optical fiber 8, a light demodulation module 9, a rail breakage diagnosis module 10 and a display module 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a pair of broken rail monitoring system not only is applicable to the rail inspection, still is applicable to and examines the specific planar meeting an emergency of the strain of longer work piece and object, like the fracture condition of inspection pipeline, the fracture condition of inspection bridge floor. The example of checking switch sections for a broken point rail is described here.
Figure 3 shows a side cross-sectional view of a point rail break monitoring system according to the present invention. Illustratively, the point rail 2 is movably arranged on one side of the stock rail 1, as shown in fig. 3. Further, the first FBG sensor 4 is bonded on a side of the tongue rail 2 remote from the stock rail 1 by a structural adhesive 5. Specifically, the structural adhesive 5 is an adhesive used for stressed parts, generally requires that the stress borne by the cemented joint is equivalent to the strength of an adherend, and the adhesive has excellent heat resistance, medium resistance, atmospheric aging resistance, vibration fatigue resistance, low creep and high endurance strength. The stability of the adhesive fixation between the first FBG sensor 4 and the point rail 2 is improved. Specifically, the first FBG sensor 4 is not limited to be mounted on the web of the point rail 2 on the side away from the stock rail 1, and the first FBG sensor 4 may be mounted on the other side of the point rail 2. For facilitating the construction operation and reducing the installation difficulty of the monitoring system, it is preferable to install the first FBG sensor 4 on the web of the switch rail 2 far away from the stock rail 1. Further, a clamp 3 is fixedly installed at one side of the switch rail 2, and an attaching section 301 at one end of the clamp 3 is attached to the first FBG sensor 4.
Further, exemplarily, as shown in fig. 4, the fixture 3 includes a fitting section 301, a support section 302, a first connection section 303, a second connection section 304, a third connection section 305, a fourth connection section 306, and a fifth connection section 307; one end of the attaching section 301 is connected with one end of the supporting section 302, and the included angle between the attaching section 301 and the supporting section 302 ranges from 90 degrees to 180 degrees; the other end of the supporting section 302 is connected with one end of the first connecting section 303, and the included angle between the supporting section 302 and the first connecting section 303 ranges from 90 degrees to 180 degrees. Specifically, the supporting end 302 and the first connecting section 303 cooperate to provide an elastic supporting force for the attaching section 301, so as to ensure that the attaching section 301 is closely attached to one side of the first FBG sensor 4. Further, the other end of the first connecting section 303 is connected with one end of the second connecting section 304, and the included angle between the first connecting section 303 and the second connecting section 304 is 90-110 degrees; the other end of the second connecting section 304 is connected with one end of the third connecting section 305, and the included angle between the second connecting section 304 and the third connecting section 305 is 90 degrees; the other end of the third connecting section 305 is connected with one end of the fourth connecting section 306, and the included angle between the third connecting section 305 and the fourth connecting section 306 is 90 degrees; the other end of the fourth connecting segment 306 is connected to one end of the fifth connecting segment 307. Specifically, the first connecting section 303, the second connecting section 304, the third connecting section 305, the fourth connecting section 306 and the fifth connecting section 307 form a fixing portion of the clamp 3, and the clamp 3 can be fixed on the point rail 2 in a clamping manner through the fixing portion. The fixture 3 has simple and practical structure and convenient assembly and disassembly, and can be disassembled for secondary utilization after the switch rail 2 is broken. Specifically, the attaching section 301, the supporting section 302, the first connecting section 303, the second connecting section 304, the third connecting section 305, the fourth connecting section 306 and the fifth connecting section 307 of the fixture 3 are all sheet-shaped structures.
The structure of the fixture 3 is not limited thereto, and the structure of the fixture 3 may be adjusted according to the structure of the point rail 2 and the actual installation environment. Such as: the fourth 306 and fifth 307 attachment sections are eliminated and the fixture 3 includes a conforming section 301, a support section 302, a first attachment section 303, a second attachment section 304, and a third attachment section 305.
Further, the fixture 3 is made of, but not limited to, carbon spring steel or alloy spring steel. Fixture 3 plays the effect that elasticity was contradicted to first FBG sensor 4, and cooperation structure adhesive 5 makes first FBG sensor 4 and switch rail 1 closely laminate, ensures that first FBG sensor 4 can keep the synchronization state with switch rail 2, has guaranteed monitoring system's accuracy.
Since the first FBG sensor 4 is closely coupled to the point rail 2, when the point rail 2 is displaced or broken, the first FBG sensor 4 is displaced following the point rail 2. Illustratively, as shown in fig. 5, several sets of first FBG sensors 4 are fixedly mounted on one side web of the point rail 2 at equal intervals by means of a structural adhesive 5 and a jig 3. Specifically, the first FBG sensor 4 is mounted at any position on the web of the point rail 2, for example: the first FBG sensor 4 may be installed at an upper, middle or lower portion of the web on the side of the point rail 2. Further, several sets of first FBG sensors 4 are connected to the first optical fiber 7 in sequence. Specifically, the first optical fiber segment 701 between two adjacent sets of first FBG sensors 4 has no external stress. Further, the first optical fiber section 701 is bonded to one side web of the point rail 2 by a structural adhesive 5. Specifically, the connection line of the plurality of sets of first FBG sensors 4 and the plurality of sets of first optical fiber segments 701 is parallel to the central axis of the web on one side of the point rail 2. Specifically, the plurality of groups of first FBG sensors 4 and the plurality of groups of first optical fiber sections 701 constitute a monitoring unit, and the stress variation of the monitoring unit and the stress variation of the switch rail 2 are kept synchronous and consistent.
The first optical fiber segment 701 and the first optical fiber 7 may be the same optical fiber or different optical fibers. The first optical fiber segment 701 and the first optical fiber 7 are exemplified as the same optical fiber.
Further, the first optical fiber 7 is mounted with the second FBG sensor 6. Specifically, the second FBG sensor 6 can be disposed at one end of the monitoring unit far away from the optical demodulation module 9, or disposed between the monitoring unit and the optical demodulation module 9, the second FBG sensor 6 is not in contact with the switch rail 2, specifically, the second FBG sensor 6 can be disposed beside the switch rail 2, the second FBG sensor 6 is in the same environmental condition with the first FBG sensors 4 of the plurality of groups, but the second FBG sensor 6 is not affected by stress variation of the switch rail 2, and the second FBG sensor 6 plays a role in temperature compensation of the first FBG sensor 4. Specifically, the second FBG sensor 6 is used to measure the temperature change of the surrounding environment, and when the temperature rises, the reflection wavelength of the second FBG sensor 6 increases; when the temperature decreases, the reflection wavelength of the second FBG sensor 6 decreases. The wavelength variation of the first FBG sensor 4 is subtracted or added with the wavelength variation of the second FBG sensor 6, so that the wavelength variation generated by the strain of the switch rail 2 at the corresponding position of the first FBG sensor 4 can be obtained, that is, the temperature compensation of the first FBG sensor 4 is realized, and the accuracy of the rail breakage monitoring system is improved.
Further, the other end of the first optical fiber 7 is in signal connection with an optical demodulation block 9. Specifically, the optical demodulation module 9 is configured to emit broadband light to the monitoring unit and demodulate wavelengths of the light reflected by the first FBG sensor 4 and the second FBG sensor 6. Further, the optical demodulation module 9 is in signal connection with the rail break diagnosis module 10 through a network or CAN bus. Specifically, the broken rail diagnosis module 10 can distinguish the strain generated by the switch rail 2 when the train passes through the switch rail 2, the strain generated by the switch rail 2 when the switch machine pulls the switch rail 2 to repel away from the stock rail 1, and the strain generated by the switch rail 2 due to thermal expansion and cold contraction, so as to judge the wavelength change of the reflected light of the first FBG sensor 4 caused by the broken rail. Further, the rail break diagnosis module 10 is connected to the display module 11 through a video transmission cable. Specifically, the display module 11 is configured to receive and display the rail break state, and send an alarm signal. Specifically, the optical demodulation module 9, the broken rail diagnosis module 10 and the display module 11 may be disposed in the machine room.
The second FBG sensor 6, which has a temperature compensation function for the first FBG sensor 4, can be installed on the same optical fiber as the first FBG sensor 4, and also can be installed on different optical fibers. Illustratively, as shown in fig. 6, several sets of first FBG sensors 4 are fixedly mounted on one side web of the point rail 2 at equal intervals by means of a structural adhesive 5 and a jig 3. Specifically, the first FBG sensor 4 is installed at any position of one side web of the point rail 2, for example: the first FBG sensor 4 may be installed at an upper, middle or lower portion of one side web of the point rail 2. Further, several sets of first FBG sensors 4 are connected to the first optical fiber 7 in sequence. Specifically, the first optical fiber segment 701 between two adjacent sets of first FBG sensors 4 has no external stress. Further, the first optical fiber section 701 is bonded to one side web of the point rail 2 by a structural adhesive 5. Specifically, the connection line between the plurality of sets of first FBG sensors 4 and the plurality of sets of first optical fiber segments 701 is parallel to the central axis of the web on one side of the point rail 2. Specifically, the plurality of groups of first FBG sensors 4 and the plurality of groups of first optical fiber sections 701 constitute a monitoring unit, and the stress variation of the monitoring unit and the stress variation of the switch rail 2 are kept synchronous and consistent.
Further, a second optical fiber 8 is disposed at one side of the monitoring unit, and one or more groups of second FBG sensors 6 are mounted on the second optical fiber 8. Further, neither the second FBG sensor 6 nor the second optical fiber 8 is in contact with the point rail 2. Specifically, the second FBG sensor 6 may be disposed beside the point rail 2, and the second FBG sensor 6 and the first FBG sensor 4 are under the same environmental conditions. Further, one end of the first optical fiber 7 and one end of the second optical fiber 8 are both in signal connection with the optical demodulation module 9. Specifically, the optical demodulation module 9 simultaneously emits the same broadband light into the first optical fiber 7 and the second optical fiber 8, and receives and demodulates the light reflected by the first FBG sensor 4 and the second FBG sensor 6. Further, the optical demodulation module 9 is in signal connection with the rail break diagnosis module 10 through a network cable or a CAN bus. Specifically, the second FBG sensor 6 is used to measure the temperature change of the surrounding environment, and when the temperature rises, the reflection wavelength of the second FBG sensor 6 increases; when the temperature decreases, the reflection wavelength of the second FBG sensor 6 decreases. The optical demodulation module 9 sends the demodulated reflected light wavelength information of each FBG sensor to the broken rail diagnosis module 10, and the broken rail diagnosis module 10 subtracts or adds the reflected light center wavelength offset of each first FBG sensor 4 to the reflected light center wavelength offset of the second FBG sensor 6, so as to obtain the reflected light center wavelength offset of each first FBG sensor 4 generated by the strain of the switch 2, that is, the second FBG sensor 6 plays a role in temperature compensation for the first FBG sensor 4. Further, the rail break diagnosis module 10 is in signal connection with the display module 11. Specifically, the rail break diagnosis module 10 sends the diagnosis result to the display module 11. When the diagnosis result is that the switch rail 2 is broken, the display module 11 displays the diagnosis result and sends out an alarm signal.
The temperature compensation of the first FBG sensor 4 is achieved by the second FBG sensor 6, and the second FBG sensor 6 may not be used. At the earlier stage of the installation of the monitoring system, through a large number of test statistics, under the known temperature condition, the reflected light center wavelengths of a plurality of groups of first FBG sensors 4 are respectively obtained, because the influence of the temperature change on all first FBG sensors 4 is the same, therefore, the variation of the reflected light center wavelengths of all first FBG sensors 4 is calculated through statistics, the influence of the temperature on the first FBG sensors 4 can be obtained, the variation of the reflected light center wavelengths of the first FBG sensors 4 caused by the temperature is subtracted or added, and the variation of the reflected light center wavelengths of the first FBG sensors 4 caused by the strain can be obtained. I.e. several sets of first FBG sensors 4 act as temperature compensation for each other.
The utility model provides a monitoring system has utilized fiber grating sensing technology, exemplaryAs shown in FIG. 7, λ is the wavelength and I is the illumination intensity. The broadband light is propagated in the optical fiber, when the light is propagated to the FBG sensor, the light meeting the preset wavelength can be reflected by the FBG sensor, and the light not meeting the preset wavelength is transmitted through the FBG sensor and is continuously propagated along the optical fiber. The basic principle of fiber grating sensing is to convert the variation of external parameters (strain, temperature, etc.) into the central wavelength λ of the reflected light of the FBG sensorBBy detecting the central wavelength λ of the reflected light of the FBG sensor after temperature compensationBThe offset of (2) realizes the monitoring of the dependent variable of the corresponding position of the steel rail. The broken rail detection is carried out by utilizing the fiber bragg grating sensing technology, and the real-time broken rail detection can be realized for the complex electrical connection environment at the switch rail 2 of the turnout section. And the FBG fiber bragg grating sensor has the advantages of high temperature resistance, small volume, light weight, low price, electromagnetic interference resistance, adaptability to severe environment and the like.
Whether the switch rail 2 is broken or not is detected in real time by using a fiber grating sensing technology, and the method is divided into two conditions:
the first condition is as follows: for example, as shown in fig. 8, when the switch rail 2 is not broken, the light demodulation module 9 can normally emit broadband light, and receive and demodulate the reflected light reflected by each of the first FBG sensors 4, and the rail breakage diagnosis module 10 can determine that the current state of the switch rail 2 is normal. When the switch rail 2 is broken and the first optical fiber section 701 adhered to the switch rail 2 is broken, the light demodulation module 9 cannot receive the reflected light signal of the first FBG sensor 4 behind the first optical fiber section 701. Specifically, the front and back sequence of the plurality of groups of first FBG sensors 4 on the first optical fiber 7 is as follows: close to the front of the optical demodulation block 9 and far from the rear of the optical demodulation block 9. The optical demodulation module 9 transmits the reflected wavelength information of each first FBG sensor 4 to the broken rail diagnosis module 10 through the network cable or the CAN bus, and each first FBG sensor 4 behind the position where the first optical fiber 7 is broken has no reflected light information, and the diagnosis result of the broken rail diagnosis module 10 is: the first optical fiber 7 is broken. The rail breakage diagnosis module 10 sends the diagnosis result to the display module 11, and the display module 11 displays the diagnosis result as follows: the point rail 2 breaks and an alarm signal is emitted.
Case two: for example, as shown in fig. 9, when the switch rail 2 is not broken, the light demodulation module 9 can normally emit broadband light, and receive and demodulate the reflected light reflected by each of the first FBG sensors 4, and the rail breakage diagnosis module 10 can determine that the current state of the switch rail 2 is normal. When the switch rail 2 is broken and the first optical fiber section 701 bonded to the switch rail 2 is not broken, a large stress variation occurs at the broken position of the switch rail 2, and the stress variation of the broken rail causes a stress variation of the first optical fiber section 701 bonded to the broken position. The reflected light center wavelength of the first FBG sensor 4 after the first fiber segment 701 is shifted. Because the train passes through switch 2, switch machine traction switch 2 and repels away from stock rail 1, switch 2 expend with heat and contract with cold and all can make switch 2 produce and meet an emergency, in broken track monitoring system installation earlier stage, through a large amount of test statistics, when producing meeting an emergency to switch 2 under the conditions such as train passes through, switch machine traction, expend with heat and contract with cold respectively, the offset of the central wavelength of the first FBG sensor 4 reflection light that corresponds presets. The broken rail diagnosis module 10 compares the actual offset of the center wavelength of the reflected light of the first FBG sensor 4 after temperature compensation with each preset offset. And if the actual offset is not within the preset offset range, the rail break diagnosis module 10 diagnoses the point rail 2 to break and sends the diagnosis result to the display module 11, and the display module 11 displays the diagnosis result that the point rail 2 breaks and sends an alarm signal.
Due to different vehicle types and different axle weights, when the train presses the switch rail 2, the strain changes generated by the switch rail 2 are different; when the switch machine pulls the switch rail 2 to repel from the stock rail 1, the strain variation generated by the switch rail 2 is different for different types of turnouts, different traction points and different working conditions. Therefore, after the broken rail monitoring system is installed on the turnout switch rail 2 in different working condition environments, a large number of tests and statistics need to be carried out on site, and the offset of the central wavelength of the reflected light of the corresponding first FBG sensor 4 under various conditions such as train passing, point switch traction, expansion with heat and contraction with cold is obtained. The data counted by the test is preset in the rail break diagnosis module 10.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A broken rail monitoring system comprises a monitoring unit and a first optical fiber (7), and is characterized in that,
the monitoring unit is bonded on the rail waist at one side of the switch rail (2) through a structural adhesive (5), and comprises a plurality of groups of first FBG sensors (4) and a plurality of groups of first optical fiber sections (701);
the first optical fiber sections (701) are respectively arranged between two adjacent groups of first FBG sensors (4), a clamp (3) is arranged on the switch rail (2), and a bonding section (301) of the clamp (3) is abutted to one side of each first FBG sensor (4);
one end of the monitoring unit is connected with one end of the first optical fiber (7).
2. A monitoring system according to claim 1, characterized in that one side of the first optical fibre section (701) abuts one side web of the point rail (2).
3. A monitoring system according to claim 1, characterized in that the line connecting the first fiber segment (701) and the first FBG sensor (4) is parallel to the one side web central axis of the point rail (2).
4. The monitoring system according to claim 1, characterized in that it further comprises a second FBG sensor (6), a light demodulation module (9), a rail break diagnosis module (10) and a display module (11).
5. A monitoring system according to claim 4, characterized in that the second FBG sensor (6) is mounted on a first optical fiber (7).
6. The monitoring system according to claim 1, characterized in that the other end of the first optical fiber (7) is connected to an optical demodulation module (9).
7. A monitoring system according to claim 4, characterized in that the second FBG sensor (6) is mounted on a second optical fiber (8).
8. The monitoring system according to claim 7, characterized in that one end of said second optical fiber (8) is connected to an optical demodulation module (9).
9. The monitoring system according to claim 4 or 6 or 8, characterized in that said light demodulation module (9) is connected to a rail break diagnostic module (10), said rail break diagnostic module (10) being connected to a display module (11).
10. A monitoring system according to claim 1, wherein the clamp (3) further comprises a support section (302), a first connection section (303), a second connection section (304), a third connection section (305), a fourth connection section (306) and a fifth connection section (307).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920597369.3U CN210063006U (en) | 2019-04-28 | 2019-04-28 | Broken rail monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920597369.3U CN210063006U (en) | 2019-04-28 | 2019-04-28 | Broken rail monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210063006U true CN210063006U (en) | 2020-02-14 |
Family
ID=69449385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920597369.3U Active CN210063006U (en) | 2019-04-28 | 2019-04-28 | Broken rail monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210063006U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368414A (en) * | 2022-01-28 | 2022-04-19 | 厦门交测智能科技有限公司 | Method and system for detecting railway turnout tightness degree based on longitudinal wave |
| CN115027530A (en) * | 2022-06-23 | 2022-09-09 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Monitoring system for railway track cracks and broken rails |
-
2019
- 2019-04-28 CN CN201920597369.3U patent/CN210063006U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368414A (en) * | 2022-01-28 | 2022-04-19 | 厦门交测智能科技有限公司 | Method and system for detecting railway turnout tightness degree based on longitudinal wave |
| CN115027530A (en) * | 2022-06-23 | 2022-09-09 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Monitoring system for railway track cracks and broken rails |
| CN115027530B (en) * | 2022-06-23 | 2023-11-24 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Monitoring system for railway track crack and broken rail |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5462244A (en) | System for detecting trains | |
| KR101470358B1 (en) | System for monitoring broken rail using an optical fiber cable | |
| CN210063006U (en) | Broken rail monitoring system | |
| CN104020221B (en) | A kind of real-time broken rail detection localization method based on supersonic guide-wave | |
| CN110926523A (en) | High-speed railway bridge safety perception and early warning system under complicated abominable condition | |
| CN101397021A (en) | Vehicle running monitoring system based on optical fibre grating | |
| CN103134432A (en) | Bridge displacement monitoring system based on optical fiber sensors | |
| CN108732614B (en) | A kind of online railway monitoring system and method based on distributed acoustic sensor | |
| Sasi et al. | A review on structural health monitoring of railroad track structures using fiber optic sensors | |
| CN107817743A (en) | A kind of bridge security online monitoring system | |
| CN104374465A (en) | Subway low-frequency vibration test device and method based on fiber bragg grating sensors | |
| CN105259184A (en) | Tunnel-vault distributed optical fiber monitoring device, construction technology thereof and monitoring method thereof | |
| CN104627205A (en) | Railway foreign matter beyond limit monitoring system based on fiber bragg grating sensor closed loop | |
| CN201980252U (en) | Rail monitoring and sensing device | |
| CN204368189U (en) | Based on the railway foreign body intrusion monitoring system of fiber-optic grating sensor closed loop | |
| CN109334715A (en) | A kind of optical fiber orbit occupancy monitoring system and method based on vibration measurement | |
| CN207300447U (en) | Bridge security monitoring device based on optical fiber sensing technology | |
| CN111854848A (en) | Health monitoring system and method for suspended monorail traffic structure | |
| CN102556115A (en) | Railway monitoring sensing device | |
| CN204214542U (en) | Based on fiber-optic grating sensor subway low-frequency vibration testing apparatus | |
| CN218059988U (en) | Sound insulation board with structure health degree self-monitoring function | |
| CN208333723U (en) | Optical fiber type pantograph pan monitoring device | |
| US11733070B2 (en) | Street light operating status monitoring using distributed optical fiber sensing | |
| CN110823144A (en) | Indicating rod displacement detecting device for switch machine | |
| CN100397034C (en) | Monitor device for anchorage cable long term working state and its method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |