Track force measuring device

Abstract

The utility model provides a track force measuring device which comprises a base plate used for being installed between a track and a sleeper, the base plate can correspondingly deform along with the stress change of the track, and the base plate is provided with an installation groove; the thin film pressure sensor is mounted on the wall surface of the mounting groove in an attached manner, and the thin film pressure sensor can monitor the deformation of the base plate in real time and convert the deformation into a pressure signal; and the acquisition unit is electrically connected with the thin film pressure sensor, and the acquisition unit can perform acquisition processing on a pressure signal monitored by the thin film pressure sensor. The track stress monitoring device has the advantages that the thin film pressure sensor is convenient to install through the base plate, track stress changes are effectively transmitted through the base plate, and real-time monitoring and analysis of the track stress condition can be achieved through effective monitoring of the thin film pressure sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of railway track detection, and particularly to a track force measuring device. Background Technique

[0002] Heavy-haul railway transportation has been widely regarded by countries around the world due to its large transportation capacity, high efficiency, low energy consumption and transportation cost. It has been internationally recognized as the development direction of railway bulk cargo transportation. Developing heavy-haul railway transportation has broad market space and important strategic significance for rapidly improving transportation capacity, alleviating the bottleneck restriction of transportation capacity, and improving the comprehensive economic benefits of transportation.

[0003] However, due to the long-term action of large loads on heavy-haul railway lines, the deterioration speed of equipment technical conditions has been accelerated, bringing potential safety hazards to heavy-haul railway transportation. Therefore, it is necessary to timely master the change rules and degrees of the technical conditions of line equipment and conduct timely maintenance to ensure the safe and smooth operation of the railway and achieve good technical and economic benefits. And track monitoring is an important technical means to master the technical conditions of line equipment. Although there are currently devices for monitoring the force on the track, there are still disadvantages such as inconvenient installation and inaccurate detection. For example, the Chinese utility model patent with the publication number CN208621213U discloses a device and system for measuring the wheel-rail force of a railway track. Its three sensors are respectively installed at the web, the upper corner of the rail base and the center of the rail base of the railway track to be measured, which is not convenient for installation and connection, time-consuming and laborious, and there are large differences in the measurement points and the measurement accuracy is not high.

[0004] Therefore, it is necessary to study a track force measuring device to solve the above problems or alleviate the influence brought by the above problems. Content of the Utility Model

[0005] The utility model provides a track force measuring device. By means of a backing plate, it is convenient to install a thin-film pressure sensor. The backing plate can effectively transmit the stress change of the track, and through the effective monitoring of the thin-film pressure sensor, it can realize the real-time monitoring and analysis of the force condition of the track, so as to effectively solve the above problems or alleviate the influence brought by the above problems.

[0006] The track force measuring device of the utility model may include:

[0007] A backing plate, which is used to be installed between the track and the sleeper. The backing plate can deform correspondingly with the stress change of the track, and the backing plate is provided with an installation groove;

[0008] A thin-film pressure sensor, which is fitted and installed on the wall surface of the installation groove. The thin-film pressure sensor can monitor the deformation of the backing plate in real time and convert it into a pressure signal;

[0009] A collection unit, which is electrically connected to the thin-film pressure sensor, and the collection unit can collect and process the pressure signals monitored by the thin-film pressure sensor.

[0010] In one embodiment, the thin-film pressure sensor includes a force sensing layer, an isolation layer, and an electrode layer that overlap in sequence. The force sensing layer is used to fit against the wall of the installation groove, the isolation layer is used to separate the force sensing layer from the electrode layer, and the electrode layer is used to connect to the collection unit.

[0011] In one embodiment, the thin-film pressure sensor has a disc structure, and the isolation layer is a hollow ring structure.

[0012] In one embodiment, the installation groove is opened at the bottom of the backing plate, and it at least includes a first groove wall extending horizontally, a second groove wall extending in the width direction of the track, and a third groove wall extending in the length direction of the track. And a thin-film pressure sensor is correspondingly provided and fitted on each of the first groove wall, the second groove wall, and the third groove wall.

[0013] In one embodiment, the thin-film pressure sensor located on the first groove wall is used to monitor the vertical force of the track, the thin-film pressure sensor located on the second groove wall is used to monitor the longitudinal force of the track, and the thin-film pressure sensor located on the third groove wall is used to monitor the lateral force of the track.

[0014] In one embodiment, downwardly protruding edges are provided on both sides of the backing plate, and the edges are used for limiting and clamping on both sides of the sleeper.

[0015] In one embodiment, the backing plate includes a groove cover, which is matched with the installation groove, and the groove cover can be embedded into the installation groove.

[0016] In one embodiment, the collection unit includes:

[0017] A signal acquisition module, which is used to receive the resistance analog signal of the thin-film pressure sensor and convert it into a digital signal;

[0018] A central controller, which is electrically connected to the signal acquisition module, and the central controller is used to calculate the pressure value corresponding to the digital signal according to the pre-calibrated pressure parameters.

[0019] In one embodiment, the collection unit further includes a communication module, which is electrically connected to the central controller and is used to transmit the monitoring data to the user terminal.

[0020] In one embodiment, the acquisition unit further includes a data storage module, which is electrically connected to the central controller and is used to store monitoring data.

[0021] The track force measuring device provided by the utility model has at least the following beneficial effects compared with the prior art:

[0022] The track force measuring device of the utility model is convenient for installing a thin film pressure sensor through the pad, and the track stress changes are effectively transmitted through the pad and effectively monitored by the thin film pressure sensor, so that the track stress condition can be monitored and analyzed in real time. In this way, the track force measuring device can improve the installation efficiency of the sensor and improve the accuracy of real-time monitoring of the track, so as to find problems and repair them in time, and ensure the safety and smoothness of the railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0024] Figure 1 It is a structural schematic diagram of a track force measuring device according to an embodiment of the utility model installed on a track;

[0025] Figure 2 It is a structural schematic diagram of a thin film pressure sensor of an embodiment of the utility model installed on a backing plate;

[0026] Figure 3 It is a structural schematic diagram of a thin film pressure sensor according to an embodiment of the utility model;

[0027] Figure 4 It is an exploded schematic diagram of a thin film pressure sensor according to an embodiment of the utility model;

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the pad of an embodiment of the utility model;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the pad of the embodiment of the utility model when viewed from above;

[0030] Figure 7 It is an exploded schematic diagram of a side view of a pad of an embodiment of the utility model;

[0031] Figure 8 It is a structural schematic diagram of the connection of the collection unit of an embodiment of the utility model.

[0032] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0033] Reference numerals:

[0034] 1 - Thin - film pressure sensor, 11 - Force - sensing layer, 12 - Isolation layer, 13 - Electrode layer, 14 - Contact protection shell,

[0035] 15 - Data transmission line, 2 - Pad, 21 - Installation groove, 211 - First groove wall, 212 - Second groove wall, 213 - Third groove wall, 22 - Extension edge, 23 - Groove cover, 3 - Acquisition unit, 31 - Signal acquisition module, 32 - Central controller, 33 - Communication module, 34 - Data storage module, 35 - Power supply, 4 - Rail. Detailed implementation mode

[0036] The present utility model will be further described below in conjunction with the drawings.

[0037] As Figure 1 and Figure 2 shown, the track force - measuring device of the present utility model may include:

[0038] Pad 2, the pad 2 is used for being installed between the rail 4 and the sleeper. The pad 2 can deform correspondingly with the stress change of the rail 4, and the pad 2 is provided with an installation groove 21;

[0039] Thin - film pressure sensor 1, the thin - film pressure sensor 1 is fitted and installed on the wall surface of the installation groove 21. The thin - film pressure sensor 1 can monitor the deformation of the pad 2 in real time and convert it into a pressure signal;

[0040] Acquisition unit 3, the acquisition unit 3 is electrically connected to the thin - film pressure sensor 1. The acquisition unit 3 can collect and process the pressure signal monitored by the thin - film pressure sensor 1.

[0041] Specifically, the pad 2 is installed between the rail 4 and the sleeper, so that the pad 2 is always in contact with the bottom of the rail 4. Further, the pad 2 can follow the stress change of the rail 4 and have the same strain. In this way, the real - time monitoring of the force condition of the rail 4 can be realized by monitoring the pad 2 through the thin - film pressure sensor 1. The pad 2 is provided with the installation groove 21 for facilitating the installation of the thin - film pressure sensor 1. The thin - film pressure sensor 1 is thin and light in volume, which is convenient for being fitted and installed on the wall surface of the installation groove 21. The thin - film pressure sensor 1 can monitor the deformation of the pad 2 in real time and convert it into a pressure signal, and then indirectly realize the real - time monitoring of the stress change of the rail 4. The acquisition unit 3 can be electrically connected to the thin - film pressure sensor 1, collect and process the pressure signal monitored by the thin - film pressure sensor 1, analyze and compare the pressure change situation, and can also upload it to the user terminal.

[0042] It should be noted that multiple thin - film pressure sensors 1 can be installed in the installation groove 21 of each pad 2 to detect the stress changes in different directions; the thin - film pressure sensors 1 on multiple pads 2 can be connected to one acquisition unit 3 for centralized processing and analysis.

[0043] Generally speaking, the track force measuring device facilitates the installation of the thin-film pressure sensor 1 through the backing plate 2, effectively transmits the stress change of the track 4 through the backing plate 2, and through the effective monitoring of the thin-film pressure sensor 1, it can realize the real-time monitoring and analysis of the force condition of the track 4. In this way, the track force measuring device can improve the installation efficiency of the sensor, improve the accuracy of real-time monitoring of the track 4, so as to facilitate the timely discovery of problems and timely maintenance, and ensure the safe and unobstructed operation of the railway.

[0044] In one example, as Figure 3 and Figure 4 shown, the thin-film pressure sensor 1 includes a force sensing layer 11, an isolation layer 12, and an electrode layer 13 that overlap in sequence. The force sensing layer 11 is used to fit with the wall of the installation groove 21, the isolation layer 12 is used to separate the force sensing layer 11 from the electrode layer 13, and the electrode layer 13 is used to connect to the acquisition unit 3.

[0045] Specifically, the force sensing layer 11 is mainly composed of a pressure-sensitive nanomaterial coated on a high-performance substrate. When it fits with the wall of the installation groove 21, it can deform correspondingly with the stress change of the backing plate 2; the isolation layer 12 is mainly bonded by a professional adhesive to separate the force sensing layer 11 from the electrode layer 13; the electrode layer 13 is composed of a highly conductive material compounded on a polyester film and can output different resistance values with the change of the force sensing layer 11.

[0046] When there is no pressure, the thin-film pressure sensor 1 is in an initial state and the output resistance is infinite; when there is pressure acting on the thin-film pressure sensor 1, the thin-film pressure sensor 1 starts to have a resistance output, and as the pressure increases, the nano piezoresistive material particles of the force sensing layer 11 cause its output resistance value to decrease under the piezoresistive effect.

[0047] Furthermore, the interface of the thin-film pressure sensor 1 is processed by using a crimped wire terminal and a low-voltage injection molding process, which has good protection ability. The wire harness of the thin-film pressure sensor 1 can use a pure copper two-core multi-strand flexible wire, and its connection with the acquisition unit 3 can use a waterproof joint.

[0048] In one example, as Figure 3 and Figure 4 shown, the thin-film pressure sensor 1 has a disc structure, and the isolation layer 12 is a hollow ring structure. In this way, in the initial state, the isolation layer 12 can separate the force sensing layer 11 from the electrode layer 13. When under pressure, the deformation of the force sensing layer 11 can cooperate with the electrode layer 13 through the hollow of the isolation layer 12 to cause a resistance change.

[0049] In one example, as Figure 2As shown in the figure, the installation groove 21 is opened at the bottom of the backing plate 2, and it includes at least a first groove wall 211 extending horizontally, a second groove wall 212 extending in the width direction of the track 4, and a third groove wall 213 extending in the length direction of the track 4. A thin-film pressure sensor 1 is correspondingly attached to each of the first groove wall 211, the second groove wall 212, and the third groove wall 213. In this way, the stress changes in different directions of the track 4 are monitored by the thin-film pressure sensors 1 on different groove walls.

[0050] Further, the thin-film pressure sensor 1 located on the first groove wall 211 is used to monitor the vertical force of the track 4 (i.e., the force in the vertical direction), the thin-film pressure sensor 1 located on the second groove wall 212 is used to monitor the longitudinal force of the track 4 (i.e., the force in the length direction of the track 4), and the thin-film pressure sensor 1 located on the third groove wall 213 is used to monitor the lateral force of the track 4 (i.e., the force in the width direction of the track 4).

[0051] Furthermore, during installation, the output ends of the three thin-film pressure sensors 1 in the installation groove 21 are centralized through the contact protection shell 14 and then connected to the acquisition unit 3 through the data transmission line 15.

[0052] In one example, as Figure 2 、 Figures 5 to 7 shown, both sides of the backing plate 2 are provided with downwardly protruding edges 22, and the edges 22 are used for limiting and clamping on both sides of the sleeper. The setting of the edges 22 can prevent relative displacement between the backing plate 2, the sleeper, and the track 4 to ensure the detection accuracy and also prevent the backing plate 2 from falling off the sleeper.

[0053] Further, as Figures 5 to 7 shown, the middle section of the edge 22 can be opened as a notch, which can reduce the weight of the backing plate 2 and save production materials.

[0054] In one example, as Figures 5 to 7 shown, the backing plate 2 includes a groove cover 23, and the groove cover 23 is matched with the installation groove 21, and the groove cover 23 can be embedded in the installation groove 21.

[0055] Specifically, the structure and size of the groove cover 23 are matched with those of the installation groove 21. After the thin-film pressure sensor 1 is installed, the groove cover 23 is embedded and installed in the installation groove 21, so that the thin-film pressure sensor 1 is located between the groove wall and the groove cover 23, which can ensure the fitting of the thin-film pressure sensor 1 with the groove wall to improve the installation stability. At the same time, the force sensing layer 11 and the electrode layer 13 of the thin-film pressure sensor 1 are both supported, making the thin-film pressure sensor 1 more sensitive and the monitoring more accurate.

[0056] Further, as Figure 2 、 Figures 5 to 7As shown in the figure, the installation groove 21 formed in the backing plate 2 has notches at both its bottom and one end. The first groove wall 211 is square, and the second groove wall 212 and the third groove wall 213 are both trapezoidal and inclined at 45° to the horizontal plane. This makes the side surface of the groove cover 23 matching the installation groove 21 also trapezoidal, and at the same time facilitates the embedded installation of the groove cover 23 and the installation groove 21.

[0057] In one example, as Figure 8 shown, the acquisition unit 3 may include:

[0058] A signal acquisition module 31, which is used to receive the resistance analog signal of the thin-film pressure sensor 1 and convert it into a digital signal;

[0059] A central controller 32, which is electrically connected to the signal acquisition module 31 and is used to calculate the pressure value corresponding to the digital signal according to the pre-calibrated pressure parameters.

[0060] Specifically, the signal acquisition module 31 is electrically connected to the thin-film pressure sensor 1. The signal acquisition module 31 can receive the resistance analog signal (pressure signal) of the thin-film pressure sensor 1 and convert it into a digital signal for the central controller 32 to process and analyze. The central controller 32 is electrically connected to the signal acquisition module 31. The central controller 32 can calculate the pressure value corresponding to the digital signal according to the pre-calibrated pressure parameters. The central controller 32 can adopt a main control MCU.

[0061] It should be noted that the thin-film pressure sensors 1 of multiple backing plates 2 can all be connected to one acquisition unit 3, and wireless (such as Bluetooth) connection or communication cable connection can be selected according to the on-site communication situation.

[0062] In one example, as Figure 8 shown, the acquisition unit 3 further includes a communication module 33, which is electrically connected to the central controller 32 and is used to transmit the monitoring data to the user terminal. Specifically, the communication module 33 can adopt a 4G module or a 5G module.

[0063] In one example, as Figure 8 shown, the acquisition unit 3 further includes a data storage module 34, which is electrically connected to the central controller 32 and is used to store the monitoring data. When the signal is poor and the monitoring data cannot be sent, the acquisition unit 3 can store the data in the data storage module 34 as a data backup and then send it when the signal improves.

[0064] In one example, as Figure 8 shown, the acquisition unit 3 may further include a power supply 35, and the power supply 35 can be a mobile power supply, such as a rechargeable battery.

[0065] To better understand the above embodiments, the usage mode of the track force measuring device of the present utility model will be further described below in conjunction with the accompanying drawings.

[0066] First, the thin film pressure sensor 1 is pre-installed in the installation groove 21 of the backing plate 2 and fastened by the groove cover 23. During the running of the train, the thin film pressure sensor 1 in the backing plate 2 can monitor the stress of the track 4 in real time, and the acquisition unit 3 can collect and process the pressure signal of the thin film pressure sensor 1 and then upload it to the user terminal. In this way, the user terminal can judge whether the track 4 needs to be repaired by comparing the stress change situation generated by the train on the backing plate 2 under the track 4 during the running of the train.

[0067] Specifically, the track force measuring device evaluates whether the line operation state is normal by comparing and analyzing the dispersion degree of the real-time stress change curve measured by the thin film pressure sensor 1 under the track 4. For example, if the 10 stress change curves obtained when 10 trains of the same type pass through the same section are basically the same as the previous normal curves, the line equipment operates normally; if the dispersion degree of a few curves is relatively large or all of them are abnormal compared with the previous normal curves, the line equipment needs to be repaired.

[0068] Although the present utility model has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A track force measuring device, characterized in that: The track force measuring device comprises: A pad, the pad is used to be installed between the track and the sleeper, the pad can be deformed accordingly with the stress change of the track, and the pad is provided with a mounting groove; A thin film pressure sensor, the thin film pressure sensor is mounted on the wall of the mounting groove, and the thin film pressure sensor can monitor the deformation of the pad in real time and convert it into a pressure signal; A collection unit, wherein the collection unit is electrically connected to the thin film pressure sensor, and the collection unit can collect and process the pressure signal monitored by the thin film pressure sensor.

2. The track force measuring device according to claim 1, characterized in that: The thin film pressure sensor includes a force sensing layer, an isolation layer and an electrode layer which overlap in sequence. The force sensing layer is used to fit with the groove wall of the installation groove, the isolation layer is used to separate the force sensing layer and the electrode layer, and the electrode layer is used to connect the acquisition unit.

3. The track force measuring device according to claim 2, characterized in that: The thin film pressure sensor is in a disc structure, and the isolation layer is in a hollow ring structure.

4. The track force measuring device according to claim 1, characterized in that: The mounting groove is opened at the bottom of the pad, and includes at least a first groove wall extending horizontally, a second groove wall extending along the width direction of the track, and a third groove wall extending along the length direction of the track, and the first groove wall, the second groove wall and the third groove wall are each correspondingly provided with a thin film pressure sensor.

5. The track force measuring device according to claim 4, characterized in that: The thin film pressure sensor located on the first groove wall is used to monitor the vertical force of the track, the thin film pressure sensor located on the second groove wall is used to monitor the longitudinal force of the track, and the thin film pressure sensor located on the third groove wall is used to monitor the lateral force of the track.

6. The track force measuring device according to any one of claims 1 to 5, characterized in that: Both sides of the pad are provided with downwardly protruding extensions, and the extensions are used for limiting and are arranged on both sides of the sleeper.

7. The track force measuring device according to any one of claims 1 to 5, characterized in that: The backing plate comprises a slot cover, which matches the mounting slot and can be embedded in the mounting slot.

8. The track force measuring device according to any one of claims 1 to 5, characterized in that: The acquisition unit comprises: A signal acquisition module, the signal acquisition module is used to receive the resistance analog signal of the thin film pressure sensor and convert it into a digital signal; A central controller is electrically connected to the signal acquisition module, and is used to calculate the pressure value corresponding to the digital signal according to a pre-calibrated pressure parameter.

9. The track force measuring device according to claim 8, characterized in that: The acquisition unit also includes a communication module, which is electrically connected to the central controller and is used to transmit monitoring data to the user end.

10. The track force measuring device according to claim 8, characterized in that: The acquisition unit also includes a data storage module, which is electrically connected to the central controller and is used to store monitoring data.

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