Ballastless track measuring device and use method

Abstract

The present invention discloses a ballastless track measuring device, including an implanting part and a monitor, wherein the implanting part includes a mounting piece and a concrete protective layer. At least one thin film sensor is mounted on the mounting piece, and all thin film sensors are located in the same plane, and the thin film sensors on the mounting piece include pressure sensors and / or temperature sensors; the concrete protective layer is wrapped around the mounting piece and the thin film sensor. The monitor is connected to the thin film sensor signal, and is used to receive the pressure signal and / or temperature signal transmitted by the thin film sensor, and output it in the form of pressure parameters and / or temperature parameters after processing. The implanting part is directly implanted into the measured part of the ballastless track, and the data detected by the thin film sensor is transmitted to the monitor for output, so that the stress and / or temperature inside the ballastless track can be directly obtained, thereby solving the problem that the stress or temperature inside the ballastless track cannot be directly measured in the prior art.

Description

Technical Field

[0001] The present invention belongs to the field of rail transit monitoring applications, and in particular relates to a ballastless track measuring device and a use method thereof. Background Art

[0002] The stress and temperature state of the concrete of the track slab and supporting layer in the track structure are important parameters that reflect its safety. Therefore, the measurement of the stress and temperature of the track structure is an important part of the concrete structure model test research and on-site monitoring. At present, the test of the track structure in the ballastless track is generally limited to the measurement of physical quantities such as load, displacement, and strain. The stress and temperature measurement is mainly obtained by sticking resistance strain gauges and sensors on the surface of the structure. The stress and temperature state inside the track structure cannot be obtained, and there are few integrated temperature and stress sensing and acquisition systems on the market. During the long-term operation of the line, due to the influence of various factors such as load and temperature force, the stress and temperature distribution inside the track structure components may change greatly. Summary of the invention

[0003] The object of the present invention is to provide a ballastless track measuring device and a use method thereof, so as to solve the problem in the prior art that the stress or temperature inside the ballastless track cannot be directly measured.

[0004] The technical solution of the present invention is:

[0005] A ballastless track measuring device comprises an implant part and a monitor, wherein the implant part comprises a mounting piece and a concrete protective layer;

[0006] At least one thin film sensor is installed on the mounting member, and all the thin film sensors are located in the same plane, and the thin film sensors on the mounting member include pressure sensors and / or temperature sensors; the concrete protective layer is wrapped around the mounting member and the thin film sensors;

[0007] The monitor is connected to the thin film sensor signal, and is used for receiving the pressure signal and / or temperature signal transmitted by the thin film sensor, and outputting the pressure signal and / or temperature signal in the form of pressure parameters and / or temperature parameters after processing.

[0008] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the mounting member comprises two frames and at least one mounting unit, and the mounting unit corresponds to the thin film sensor one by one;

[0009] The installation unit includes two steel sheets, the thin film sensor is glued between the two steel sheets, all the installation units are sequentially connected between the two frames at intervals along the length direction of the frame, and all the installation units are located in the same plane.

[0010] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the frame is a steel frame, and the steel frame is welded to the mounting unit.

[0011] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the surface of the thin film sensor is coated with epoxy resin, and the thin film sensor and the steel sheet are bonded by epoxy resin.

[0012] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the concrete protective layer is a cylinder, the center line of the cylinder is parallel to the length direction of the skeleton, and the implantation part is symmetrical about the center line of the cylinder.

[0013] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the thin film sensor is connected to the monitor signal via a wire, the connection terminal of the thin film sensor is welded to the joint of the wire, and the welded connection is wrapped with silicone.

[0014] Preferably, in the ballastless track measuring device provided by an embodiment of the present invention, the monitor is also used to transmit the pressure parameter and / or temperature parameter to a remote receiving end via wireless.

[0015] A method for using the ballastless track measuring device described in any one of the above items,

[0016] S1: drilling a hole at a measured position of the ballastless track, embedding the implant part into the hole, and injecting a reinforcing bar glue into the hole to fix the implant part;

[0017] S2: Installing the monitor on the outer wall surface of the ballastless track.

[0018] Preferably, the method for using the ballastless track measuring device provided in an embodiment of the present invention further includes step S0 before step S1: calibrating the ballastless track measuring device in a laboratory to determine the relationship between the resistance of the thin film sensor and the pressure or temperature.

[0019] Preferably, the method for using the ballastless track measuring device provided by an embodiment of the present invention comprises:

[0020] S01: firstly, preparing a test piece with the same environment as the position to be tested, and reserving a reserved hole for placing the implant part when preparing the test piece;

[0021] S02: placing the implantation part in the reserved hole, and then placing the test piece on a universal testing machine for calibration, and measuring the relationship between the resistance of the thin film sensor and the pressure or temperature.

[0022] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0023] (1) The present invention can directly implant the implant part into the measured part of the ballastless track, and the implant part includes at least one thin film sensor. These thin film sensors can all be selected as pressure sensors or temperature sensors, or include pressure sensors and temperature sensors at the same time. The data detected by the thin film sensor is transmitted to the monitor for output, and the stress and / or temperature inside the ballastless track can be directly obtained, thereby solving the problem in the prior art that the stress or temperature inside the ballastless track cannot be directly measured.

[0024] (2) The present invention provides a basis for the study of the nonlinear stress behavior of track structures, and at the same time provides a certain theoretical reference for the maintenance and repair of railways, thereby ensuring the safety of high-speed railway operations.

[0025] (3) The present invention is simple and convenient to manufacture and install, and can be quickly constructed and installed within a limited skylight time.

[0026] (4) The present invention facilitates data collection. The pressure and / or temperature can be wirelessly transmitted to a remote receiving end through the monitor. At the same time, the data can also be read from the monitor on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0028] Figure 1 It is a structural schematic diagram of a ballastless track measuring device of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a mounting member of the present invention;

[0030] Figure 3 The figure is a schematic diagram of the installation position of a ballast track measuring device of the present invention.

[0031] Description of reference numerals:

[0032] 1: Frame; 2: Steel sheet; 3: Concrete protective layer; 4: Wire; 5: Monitor; 6: Track plate; 7: Mortar layer; 8: Base plate. DETAILED DESCRIPTION

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0034] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0035] See also Figures 1 to 3 This embodiment provides a ballastless track measuring device, including an implant part and a monitor 5, wherein the implant part includes a mounting part and a concrete protective layer 3. At least one thin film sensor is mounted on the mounting part, and all thin film sensors are located in the same plane. The thin film sensors on the mounting part include pressure sensors and / or temperature sensors; the concrete protective layer 3 is wrapped around the mounting part and the thin film sensors. The monitor 5 is connected to the thin film sensor signal, and is used to receive the pressure signal and / or temperature signal transmitted by the thin film sensor, and output it in the form of pressure parameters and / or temperature parameters after processing.

[0036] In this embodiment, the implantation part can be directly implanted into the measured part of the ballastless track, and the implantation part includes at least one thin film sensor, which can all be selected as pressure sensors or temperature sensors, or include pressure sensors and temperature sensors at the same time. The data detected by the thin film sensor is transmitted to the monitor 5 for output, and the stress and / or temperature inside the ballastless track can be directly obtained, thereby solving the problem that the stress or temperature inside the ballastless track cannot be directly measured in the prior art. At the same time, this embodiment provides a basis for the study of the nonlinear force behavior of the track structure, provides a certain theoretical reference for the maintenance and repair of the railway, and ensures the safety of high-speed railway operation.

[0037] The structure of this embodiment is now described.

[0038] The thin film sensor is installed on the mounting part, and the mounting part ensures that the thin film sensor is accurately positioned when the entire ballastless track measuring device is installed in the ballastless track. The mounting part includes two frames 1 and at least one mounting unit, and the mounting unit corresponds to the thin film sensor one by one. The mounting unit includes two steel sheets 2, and the thin film sensor is glued between the two steel sheets 2. Specifically, epoxy resin can be wrapped on the surface of the thin film sensor, and then the two steel sheets 2 are attached to the epoxy resin. The epoxy resin not only plays the role of connecting the thin film sensor and the steel sheet 2, but also plays the role of protecting and waterproofing the thin film sensor. The signal connection between the thin film sensor and the monitor 5 can be made through the wire 4, and the terminal of the thin film sensor and the joint of the wire 4 can be connected by welding, and silicone can be applied at the welding connection to prevent water from entering and affecting the detection.

[0039] The mounting unit is sheet-shaped, and all mounting units are sequentially connected between two frames 1 at intervals along the length direction of the frame 1, and all mounting units are located in the same plane, that is, the mounting piece as a whole is a ladder-like shape. The frame 1 can be a steel frame, and the steel frame is welded to the mounting unit (i.e., the steel sheet 2). In this embodiment, the steel frame can be directly made of steel bars.

[0040] In this embodiment, there is no restriction on the spacing distance between adjacent thin film sensors and it can be set according to actual needs; there is no restriction on whether a pressure sensor or a temperature sensor is installed on the installation unit and it can be selected whether to install a pressure sensor or a temperature sensor according to whether pressure or temperature needs to be detected at the location of the installation unit.

[0041] In this embodiment, the prepared mounting part (including the thin film sensor mounted thereon) is placed in a cylindrical mold, the position of the mounting part is adjusted, concrete is poured to make the concrete protective layer 3, and the concrete protective layer 3 is taken out and cured after solidification. The concrete protective layer 3 is a cylinder, the center line of the cylinder is parallel to the length direction of the frame 1, and the implantation part is symmetrical about the center line of the cylinder.

[0042] Furthermore, the monitor 5 is also used to transmit the pressure parameter and / or temperature parameter to the remote receiving end by wireless transmission. Therefore, by adopting this embodiment, data can be read from the monitor 5 on site, and the pressure parameter and / or temperature parameter can be read on the remote receiving end.

[0043] The method for using the ballastless track measuring device provided in this embodiment is as follows:

[0044] S1: drilling a hole at the measured position of the ballastless track, removing the floating dust in the hole after drilling, then burying the implant part in the hole, leading out the wire 4 to connect to the monitor 5, and then injecting the reinforcing bar glue into the hole to ensure that the implant part and the hole can be tightly connected, thereby fixing the implant part and preventing the implant part from moving out;

[0045] S2: Extend the conductor 4 to the roadbed and install the monitor 5 on the outer wall surface of the ballastless track.

[0046] Among them, in this embodiment, the steel sheet 2 can be a square steel sheet with a side length of 20 cm, and the hole at the measured position can be a hole with a diameter of 30 cm. Of course, in other embodiments, the shape and size of the steel sheet 2, the size of the hole at the measured position, etc. can be selected according to actual conditions, and are not limited here. The installation position of the monitor 5 is also not limited, and it does not have to be installed on the outer wall surface of the ballastless track. It can be installed at a position that is easy to view according to actual conditions.

[0047] Therefore, the ballastless track measuring device provided in this embodiment is easy to install and can be quickly constructed and installed within a limited window of time.

[0048] Furthermore, before step S1, step S0 may be included: calibrating the ballastless track measuring device in a laboratory to determine the relationship between the resistance of the thin film sensor and the pressure or temperature. Specifically, step S0 may include:

[0049] S01: First, a cubic specimen is prepared with the same environment as the location to be tested, and a reserved hole for placing the implant is reserved during the preparation of the specimen;

[0050] S02: Place the implant part in the reserved hole, and then place the cubic specimen on a universal testing machine for calibration, and measure the relationship between the resistance of the thin film sensor and the pressure or temperature.

[0051] The thin film sensor measures the corresponding pressure or temperature relationship based on the change of internal resistance. Although the relationship between resistance and pressure (or temperature) of most thin film sensors is the same as the standard data when in use, occasionally the relationship between resistance and pressure (or temperature) of some thin film sensors may be different from the standard. If such a thin film sensor is encountered, the ballastless track measurement device provided in this embodiment will have errors, and step S0 is to calibrate in the laboratory to determine the relationship between the resistance and pressure or temperature of the thin film sensor, thereby ensuring the accuracy of the measurement data.

[0052] When the internal stress and temperature of the ballastless track structure change due to factors such as temperature, the signal received by the thin film sensor is more obvious, and the collected data is transmitted to the monitor 5 through the wire 4. The monitor 5 remotely transmits the collected data to the remote receiving end to complete the measurement of the internal stress of the track plate 6.

[0053] The ballastless track includes a track plate 6, a mortar layer 7 and a base plate 8 from the outside to the inside. In this embodiment, Figure 3 As shown, a hole is punched in the track plate 6, the entire implantation portion is disposed in the track plate 6, and the two ends of the implantation portion are just located on the two surfaces of the track plate 6. In other embodiments, according to actual conditions, the implantation portion may extend into a portion of the track plate 6, or pass through the track plate 6 into the mortar layer 7, or even into the base plate 8, and there is no limitation here.

[0054] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A ballastless track measuring device, characterized in that: The implant comprises an implant part and a monitor, wherein the implant part comprises a mounting part and a concrete protective layer; At least one thin film sensor is installed on the mounting member, and all the thin film sensors are located in the same plane, and the thin film sensors on the mounting member include pressure sensors and / or temperature sensors; the concrete protective layer is wrapped around the mounting member and the thin film sensors; The monitor is connected to the thin film sensor signal, and is used to receive the pressure signal and / or temperature signal transmitted by the thin film sensor, and output it in the form of pressure parameters and / or temperature parameters after processing; Wherein, the mounting member comprises two frames and at least one mounting unit, and the mounting unit corresponds to the thin film sensor one by one; The installation unit includes two steel sheets, the thin film sensor is glued between the two steel sheets, all the installation units are sequentially connected between the two frames at intervals along the length direction of the frame, and all the installation units are located in the same plane; The thin film sensor is connected to the monitor signal through a wire.

2. The ballastless track measuring device according to claim 1, characterized in that: The frame is a steel frame, and the steel frame is connected to the installation unit by welding.

3. The ballastless track measuring device according to claim 1, characterized in that: The surface of the thin film sensor is coated with epoxy resin, and the thin film sensor and the steel sheet are bonded by epoxy resin.

4. The ballastless track measuring device according to claim 1, characterized in that: The concrete protective layer is a cylinder, the center line of the cylinder is parallel to the length direction of the frame, and the implantation part is symmetrical about the center line of the cylinder.

5. The ballastless track measuring device according to claim 1, characterized in that: The connection terminal of the film sensor is welded to the joint of the wire, and the welding connection is wrapped with silica gel.

6. The ballastless track measuring device according to claim 1, characterized in that: The monitor is also used to transmit the pressure parameter and / or temperature parameter to a remote receiving end via wireless.

7. A method for using the ballastless track measuring device according to any one of claims 1 to 6, characterized in that: S1: drilling a hole at a measured position of the ballastless track, embedding the implant part into the hole, and injecting a reinforcing bar glue into the hole to fix the implant part; S2: Installing the monitor on the outer wall surface of the ballastless track.

8. The method for using the ballastless track measuring device according to claim 7, characterized in that: Before S1, the method further includes step S0: calibrating the ballastless track measuring device in a laboratory to determine the relationship between the resistance of the thin film sensor and the pressure or temperature.

9. The method for using the ballastless track measuring device according to claim 8, characterized in that: The S0 includes: S01: firstly, preparing a test piece with the same environment as the position to be tested, and reserving a reserved hole for placing the implant part when preparing the test piece; S02: placing the implantation part in the reserved hole, and then placing the test piece on a universal testing machine for calibration, and measuring the relationship between the resistance of the thin film sensor and the pressure or temperature.

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