Low-power-consumption wireless stress rail temperature acquisition module

Abstract

The embodiment of the utility model discloses a low-power-consumption wireless stress rail temperature acquisition module, which is characterized in that a first acquisition device and a reflector are arranged on a steel rail, and data processing equipment is in communication connection with the first acquisition device and a second acquisition device. Therefore, the temperature and stress changes of the steel rail can be collected through the strain gauge and the temperature sensor which are arranged on the rail waist, and temperature data and stress data are sent to the data processing equipment through the first ZIGBEE module and the second ZIGBEE module. Meanwhile, the laser range finder faces the reflective slope, and displacement generated by the steel rail can be detected. And the data processing equipment can upload the temperature data, the stress data and the displacement data together, so that monitoring personnel can detect the temperature stress of the steel rail in time, and the detection accuracy is also improved. And on the other hand, the first ZIGBEE module and the second ZIGBEE module are used for transmitting data between the first acquisition device and the data processing equipment, so that the power consumption of the low-power-consumption wireless stress rail temperature acquisition module can be reduced.

Description

Technical Field

[0001] The utility model relates to the railway field, in particular to a low-power wireless stress rail temperature acquisition module. Background Art

[0002] Seamless rails can improve the smoothness of rail vehicles and reduce noise, making passengers more comfortable, but seamless rails will also produce temperature stress. When the temperature stress is large, it is difficult for fasteners to offset the temperature stress, and the rails will move, which will affect the safety of rail vehicles. How to improve the inspection efficiency and accuracy of rails has become a problem that needs to be solved. Utility Model Content

[0003] In view of this, the embodiment of the utility model provides a low-power wireless stress rail temperature acquisition module, which uses a first acquisition device to detect the temperature and stress of the rail, and uses a second acquisition device to detect the displacement of the rail, and uses a data processing device to upload the collected temperature data, stress data and displacement data. Thus, the accuracy and timeliness of rail detection are improved.

[0004] The low-power wireless stress rail temperature acquisition module of the utility model embodiment includes:

[0005] A data processing device, including a first ZIGBEE module and a data uploading device;

[0006] A first acquisition device includes a temperature sensor, a strain gauge, and a second ZIGBEE module, wherein the second ZIGBEE module is wirelessly connected to the first ZIGBEE module to transmit data acquired by the first acquisition device; and

[0007] A second acquisition device, which is communicatively connected to the data processing device and includes a plurality of reflective plates and a plurality of laser rangefinders corresponding to the plurality of reflective plates, wherein the reflective plates have a reflective inclined surface;

[0008] The reflective plate, the temperature sensor and the strain gauge are arranged on the waist of the rail, and the reflective plate moves with the rail. The second acquisition device and the data processing equipment are arranged on the same side of the rail. The sensing head of the laser rangefinder faces the corresponding reflective inclined surface. The data uploading device receives and uploads the data collected by the first acquisition device and the second acquisition device.

[0009] Furthermore, the low-power wireless stress rail temperature acquisition module also includes:

[0010] a plurality of first cables; and

[0011] A mounting portion, arranged on one side of the rail;

[0012] The data processing device and the plurality of laser rangefinders are arranged on the installation portion, and the data processing device is communicatively connected with the plurality of laser rangefinders via a plurality of the first cables.

[0013] Further, the data processing device includes a first circuit board and a first main control chip, and the data uploading device includes a GPRS chip and an antenna;

[0014] The first main control chip and the GPRS chip are arranged on the first circuit board, the first main control chip is communicatively connected with the plurality of laser rangefinders, the GPRS chip is communicatively connected with the first main control chip and the antenna, and the antenna is arranged on the mounting portion.

[0015] Further, the mounting portion includes a main frame and a side plate, the main frame is arranged on a column erected on one side of the rail, and the main frame maintains a predetermined distance from the ground, and the side plate is arranged on a side of the main frame close to the rail, and the length direction of the side plate is parallel to the length direction of the column;

[0016] A plurality of laser rangefinders are arranged on the side plate and spaced apart along the length direction of the side plate.

[0017] Furthermore, the reflector corresponding to the laser rangefinder close to the ground is closer to the column than the reflector corresponding to the laser rangefinder far from the ground.

[0018] Furthermore, the first acquisition device further includes:

[0019] Second cable;

[0020] A control box is arranged at the bottom of the rail and between two sleepers, the control box comprises a second circuit board, a second main control chip and a second ZIGBEE module, the second main control chip and the second ZIGBEE module are arranged on the second circuit board and are communicatively connected; and

[0021] The acquisition head is communicatively connected to the second main control chip through the second cable and includes a third circuit board, the temperature sensor and the strain gauge. The third circuit board, the temperature sensor and the strain gauge are attached to the waist of the rail. The temperature sensor and the strain gauge are communicatively connected to the second cable through the third circuit board.

[0022] Furthermore, the number of the strain gauges is four, the four strain gauges include two first strain gauges and two second strain gauges, the arrangement directions of the two first strain gauges and the two second strain gauges are perpendicular to each other, and the first strain gauges are arranged along the length direction of the rail.

[0023] Furthermore, the acquisition head also includes a bridge module, which includes a first bridge arm, a second bridge arm, a third bridge arm and a fourth bridge arm connected end to end in sequence, two of the first strain gauges are respectively connected to the first bridge arm and the third bridge arm, and two of the second strain gauges are respectively connected to the third bridge arm and the fourth bridge arm.

[0024] Furthermore, the first acquisition device also includes a power supply box and a third cable. The power supply box is arranged at the bottom of the rail and between two sleepers. The power supply box is electrically connected to the control box through the third cable.

[0025] Furthermore, the temperature sensor is a digital temperature sensor having three pins electrically connected to the third circuit board.

[0026] The low-power wireless stress rail temperature acquisition module of the embodiment of the utility model sets the first acquisition device and the reflector on the rail, and connects the data processing equipment to the first acquisition device and the second acquisition device for communication. Therefore, the temperature and stress changes of the rail can be collected by using the strain gauge and temperature sensor set on the rail waist, and the temperature data and stress data are sent to the data processing equipment by using the first ZIGBEE module and the second ZIGBEE module. At the same time, the displacement of the rail can be detected by pointing the laser rangefinder toward the reflective slope. The data processing equipment can upload the temperature data, stress data and displacement data together, so that the monitoring personnel can detect the temperature stress of the rail in time, and the accuracy of the detection is also improved. On the other hand, the power consumption of the low-power wireless stress rail temperature acquisition module can also be reduced by using the first ZIGBEE module and the second ZIGBEE module to transmit data between the first acquisition device and the data processing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0028] Figure 1 This is a schematic diagram of the system architecture of the low-power wireless stress rail temperature acquisition module of the embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the installation of a low-power wireless stress rail temperature acquisition module according to an embodiment of the utility model;

[0030] Figure 3 It is a structural schematic diagram of a laser range finder and a mounting portion of an embodiment of the utility model;

[0031] Figure 4 It is a schematic diagram of the installation of the first collecting device and the reflective plate of the embodiment of the utility model;

[0032] Figure 5 It is a circuit diagram of a data processing device and a laser range finder according to an embodiment of the utility model;

[0033] Figure 6 It is a circuit diagram of a first acquisition device in an embodiment of the utility model;

[0034] Figure 7 It is a monitoring curve diagram of temperature data, stress data and displacement data of an embodiment of the utility model;

[0035] Figure 8 It is a schematic diagram of the detection curve of the temperature data, stress data and locked rail temperature of the rail in the first state of the embodiment of the utility model;

[0036] Fig. 9 It is a schematic diagram of the detection curve of temperature data, stress data and locked rail temperature of the rail in the second state according to an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] 1- first collection device;

[0039] 11- Temperature sensor;

[0040] 12-strain gauge; 121-first strain gauge; 122-second strain gauge;

[0041] 13- Second ZIGBEE module;

[0042] 14- second cable;

[0043] 15-control box; 152-second circuit board; 153-second main control chip;

[0044] 16-collection head; 161-third circuit board; 162-bridge module;

[0045] 17-power supply box;

[0046] 18- third cable;

[0047] 2- Second collection device;

[0048] 21-reflective plate; 211-reflective slope;

[0049] 22-Laser rangefinder;

[0050] 3- Data processing equipment;

[0051] 31- the first ZIGBEE module;

[0052] 32-data uploading device; 321-antenna;

[0053] 33-first circuit board;

[0054] 34- first main control chip;

[0055] 4- Installation part;

[0056] 41-main frame; 42-side plate; 43-column;

[0057] 5-First cable. DETAILED DESCRIPTION

[0058] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. For those skilled in the art, the present invention can be fully understood without the description of these details. In order to avoid confusing the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0059] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0060] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0061] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0062] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0063] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, an element described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0064] Figure 1 2 is a schematic diagram of the system architecture of the low-power wireless stress rail temperature acquisition module of this embodiment. The rail in the figure is provided with two low-power wireless stress rail temperature acquisition modules to detect the temperature stress at different positions of the rail respectively.

[0065] Figure 2 FIG. 1 is a schematic diagram of the installation of the low-power wireless stress rail temperature acquisition module of this embodiment. Figure 2 As shown, the data processing device 3 in the figure is arranged adjacent to four rails, and the four rails form two tracks.

[0066] Figure 3 : is a schematic diagram of the structure of the laser rangefinder 22 and the mounting portion 4 of this embodiment. The figure shows four laser rangefinders 22 arranged on the mounting portion 4, and the angles between the orientations of the sensor heads of the four laser rangefinders 22 and the horizontal direction are respectively a1, a2, a3 and a4, and the angles of the angles a1, a2, a3 and a4 increase in sequence. The figure shows a first cable 5 connected to a laser rangefinder 22.

[0067] Figure 4 2 is a schematic diagram of the installation of the first collecting device 1 and the reflective plate 21 of this embodiment. In the figure, the first collecting device 1 and the reflective plate 21 are arranged on the same side of the rail.

[0068] Figure 5 Schematic diagram of the circuit of the data processing device 3 and the laser range finder 22 of this embodiment. Figure 6 Schematic diagram of the circuit of the first acquisition device 1 of this embodiment.

[0069] In some embodiments, Figure 2 , Figure 5 and Figure 6As shown, the low-power wireless stress rail temperature acquisition module in this embodiment includes a first acquisition device 1, a second acquisition device 2 and a data processing device 3. The first acquisition device 1 includes a temperature sensor 11, a strain gauge 12 and a second ZIGBEE module 13. The second ZIGBEE module 13 is wirelessly connected to the first ZIGBEE module 31 to transmit the data collected by the first acquisition device 1. The second acquisition device 2 is communicatively connected to the data processing device 3 and includes a plurality of reflectors 21 and a plurality of laser rangefinders 22 corresponding to the plurality of reflectors 21, and the reflectors 21 have a reflective inclined surface 211.

[0070] Further reference Figure 1 and Figure 4 As shown, the reflector 21, the temperature sensor 11 and the strain gauge 12 are arranged on the waist of the rail, and the reflector 21 moves with the rail (such as Figure 4 The second acquisition device 2 and the data processing device 3 are arranged on the same side of the rail so that the second acquisition device 2 and the data processing device 3 can be connected to each other in communication. The sensing head of the laser rangefinder 22 faces the corresponding reflective inclined surface 211, and the data uploading device 32 receives and uploads the data collected by the first acquisition device 1 and the second acquisition device 2.

[0071] It is easy to understand that in the related art with publication number CN113654464A ( Figure 5 and paragraph 0048 of the specification), the laser rangefinder 22 is used to detect the distance between the reflective inclined surface 211 and it, and the displacement data of the current rail moving in the length direction can be indirectly obtained.

[0072] The second acquisition device 2 in this embodiment is provided with a plurality of laser rangefinders 22 and a corresponding plurality of reflectors 21. When the plurality of reflectors 21 are respectively provided on a plurality of rails, the data processing device 3 can simultaneously acquire displacement data of the plurality of rails. At the same time, a strain gauge 12 and a temperature sensor 11 are provided on each rail, so that the first acquisition device 1 can detect the temperature data and stress data of each rail.

[0073] In summary, the low-power wireless stress rail temperature acquisition module of this embodiment sets the first acquisition device 1 and the reflector 21 on the rail, and the data processing device 3 is connected to the first acquisition device 1 and the second acquisition device 2 for communication. Therefore, the strain gauge 12 and the temperature sensor 11 set on the rail waist can be used to collect the temperature and stress changes of the rail, and the temperature data and stress data are sent to the data processing device 3 using the first ZIGBEE module 31 and the second ZIGBEE module 13. At the same time, the laser rangefinder 22 is directed toward the reflective slope 211 to detect the displacement of the rail. The data processing device 3 can upload the temperature data, stress data and displacement data together, so that the monitoring personnel can detect the temperature stress of the rail in time, and also improve the accuracy of the detection. On the other hand, the power consumption of the low-power wireless stress rail temperature acquisition module can also be reduced by using the first ZIGBEE module 31 and the second ZIGBEE module 13 to transmit data between the first acquisition device 1 and the data processing device 3.

[0074] In an optional implementation, the temperature data and stress data of the rail are collected by the first collection device 1, and the data are transmitted to the data processing device 3 through the second ZIGBEE module 13 and the first ZIGBEE module 31. At the same time, the displacement data of the rail is collected by the second collection device 2. Then, the temperature data, stress data and displacement data are uploaded to the server together by the data uploading device 32. The monitoring personnel can use the three data to evaluate the temperature stress of the current rail.

[0075] Specifically, the real-time locked rail temperature at time t=i can be estimated by formula 1, formula 3 and formula 4, and the locked rail temperature at the calibration time t=0 can be estimated by formula 2. Formula 5 can further estimate the average locked rail temperature Tav by using Ts(i) obtained by formula 1, formula 3 or formula 4, and Ts(0) obtained by formula 2. The average locked rail temperature Tav in this embodiment is used to characterize the changing trend of the locked rail temperature.

[0076] Formula 1 is Ts(i)=Tr(i)+σ(i) / (E×α);

[0077] Formula 2 is Ts(0)=Tr(0)+σ(0) / (E×α);

[0078] Formula 3 is Ts(i)=Tr(i)+(σ(i) / (2.478+σ(0) / 2.478));

[0079] Formula 4 is Ts(i)=Tr(i)+(σ(i) / (2.478+(Ts(0)-Tr(0))));

[0080] Formula 5 is Tav=(∑(Tr(i)+σ(i) / 2.478) / N)+Ts(0)-Tr(0).

[0081] Wherein, Ts(i) is the real-time locked rail temperature at time t=i; Tr(i) is the rail temperature at time t=i; E(rail elastic modulus)=2.1×10^5(MPa); α(rail linear expansion coefficient)=(11.8×10^-6) / ℃, σ(i) is the measured stress at time t=i (MPa); i=1,2,3…N, i represents the number of acquisitions; Tr(i) is the rail temperature at time t=i, Ts(0) is the locked rail temperature at the calibration time, Tr(0) is the rail temperature at the calibration time; E(rail elastic modulus)=2.1*10^5(MPa).

[0082] At the same time, the calculated locking rail temperature Tsc can be estimated by formula 6, which can also characterize the changing trend of the locking rail temperature. Since the displacement measured by the laser rangefinder 22 fluctuates greatly due to the influence of the environment, it is not convenient to observe the changing state of the rail displacement, and the calculated locking rail temperature is given as an average value.

[0083] Formula 6 is Tsc=Ts(0)+∑(△l(i) / (L×11.8×10^-6)) / N.

[0084] △l can be estimated by formula 7.

[0085] Formula 7 is Δl=α×L×Δt.

[0086] Wherein, i=1,2,3…N, i represents the number of acquisitions; Ts(0) is the locked rail temperature at the calibration time, △l(i) is the rail expansion and contraction at time t=i (mm); L is the actual length of the rail (mm); α is the rail linear expansion coefficient; △t is the rail temperature variation amplitude.

[0087] This △t can be obtained in advance by conducting experiments on the rails, that is, △t=△l / (α×L). For a rail with a fixed length L of millimeters, the expansion and contraction amount △l mm is measured, and the temperature increment △t of the rail can be calculated and locked. For example, if L=1000 meters (10^6 mm), then △t=(△l / 11.8)℃, indicating that the rail temperature will change by 1℃ if the rail expands and contracts by 11.8 mm.

[0088] Therefore, the average locked rail temperature Tav and the calculated locked rail temperature Tsc estimated by the above formula can facilitate monitoring personnel to accurately evaluate the current state of the rail.

[0089] Figure 7: is a monitoring curve diagram of temperature data, stress data and displacement data of the embodiment. Curve A and curve B in the figure are temperature data and stress data collected by the first acquisition device 1, respectively. Curve C is the displacement data collected by the second acquisition device 2. It can be seen from the figure that when the temperature data is less than 15°C, the stress data and displacement data will change significantly.

[0090] Figure 8 It is a schematic diagram of the detection curve of the temperature data, stress data and locked rail temperature of the rail in the first state of this embodiment. Fig. 9 1 is a schematic diagram of the detection curves of the temperature data, stress data and locked rail temperature of the rail in the second state of the present embodiment. Curve A, curve B and curve C in the two figures respectively represent the change trends of the temperature data, stress data and locked rail temperature.

[0091] Specifically, in the first state, the fastener is in a state of locking the rail. In the second state, the fastener is in a state of unlocking the rail. As can be seen from the figure, in the first state, as curve A changes, curve B changes together, and curve C moves toward 20°C, that is, the locking rail temperature is close to the locking rail temperature during construction (its change range is small). This shows that the fastener is still locking the rail. In the second state, as curve A changes, curve B changes together, and curve C partially overlaps with curve A (its change range is large). This shows that the fastener is in a state of unlocking the rail, that is, the fastener is no longer working. Therefore, large temperature changes will cause large stress changes, which will cause the rail to break.

[0092] Thus, the monitoring personnel at the server end can replace the rails or fasteners in time according to the monitoring data. The locking rail temperature in this embodiment can be obtained according to the real-time locking rail temperature in the above embodiment.

[0093] In some embodiments, Figure 2-Figure 3 As shown, the low-power wireless stress rail temperature acquisition module in this embodiment also includes multiple first cables 5 and a mounting portion 4. The mounting portion 4 is arranged on one side of the rail. The data processing device 3 and multiple laser rangefinders 22 are arranged on the mounting portion 4, and the data processing device 3 is connected to the multiple laser rangefinders 22 through the multiple first cables 5.

[0094] The mounting portion 4 in this embodiment can facilitate the operator to install the second acquisition device 2 on one side of the rail, so that the data processing device 3 and the first acquisition device 1 can be close to each other, so as to facilitate the wireless connection between the first ZIGBEE module 31 and the second ZIGBEE module 13, and also facilitate the laser rangefinder 22 to transmit and receive laser signals to the reflector 21. At the same time, the first cable 5 realizes the direct connection between the laser rangefinder 22 and the data processing device 3.

[0095] Specifically, the first acquisition device 1 and the reflector 21 in this embodiment are arranged on the rail to form an on-rail device. The data processing device 3 and the laser rangefinder 22 are arranged on the mounting portion 4 to form a trackside device. Those skilled in the art can install the modular on-rail device and trackside device along the layout direction of the rail to simplify the installation process of the low-power wireless stress rail temperature acquisition module.

[0096] In some embodiments, Figure 2 and Figure 5 As shown, the data processing device 3 includes a first circuit board 33 and a first main control chip 34. The data upload device 32 includes a GPRS chip and an antenna 321.

[0097] The first main control chip 34 and the GPRS chip are arranged on the first circuit board 33 . The first main control chip 34 is communicatively connected with the plurality of laser range finders 22 . The GPRS chip is communicatively connected with the first main control chip 34 and the antenna 321 . The antenna 321 is arranged on the mounting portion 4 .

[0098] Specifically, Figure 5-Figure 6 As shown, a first power supply is provided on the data processing device 3. A triode, a main buck regulator, a secondary buck regulator and a low voltage difference linear regulator are provided on the first circuit board 33. The first power supply supplies power to the data upload device 32 through the main buck regulator, and the first power supply supplies power to multiple laser range finders 22 through the secondary buck regulator. At the same time, the first main control chip 34 controls the on and off of the power supply to the laser range finder 22 through the triode. The first power supply supplies power to the first main control chip 34 through the main buck regulator and the low voltage difference linear regulator. In contrast, the first acquisition device 1 also includes a second power supply for supplying power to the second main control chip 153.

[0099] The data processing device 3 in this embodiment uses a 2G network to communicate wirelessly with the server, and realizes wireless communication between the first acquisition device 1 and the data processing device 3 through the first ZIGBEE module 31 and the second ZIGBEE module 13. Thus, the power consumption of the data processing device 3 and the first acquisition device 1 can be further reduced, so that the working time of the first power supply and the second power supply is longer.

[0100] In some embodiments, Figure 2-Figure 3 As shown, the mounting portion 4 includes a main frame 41 and a side plate 42. The main frame 41 is arranged on a column 43 erected on one side of the rail, and the main frame 41 maintains a predetermined distance from the ground. The side plate 42 is arranged on the side of the main frame 41 close to the rail, and the length direction of the side plate 42 is parallel to the length direction of the column 43. A plurality of laser rangefinders 22 are arranged on the side plate 42 and spaced apart along the length direction of the side plate 42.

[0101] Therefore, the laser rangefinder 22 arranged on the side panel 42 can avoid interference with the data processing device 3. At the same time, multiple laser rangefinders 22 are arranged along the height direction of the column 43, so that the multiple laser rangefinders 22 can respectively emit and receive laser signals toward the corresponding reflective plate 21.

[0102] Furthermore, the reflector 21 corresponding to the laser rangefinder 22 close to the ground is closer to the column 43 than the reflector 21 corresponding to the laser rangefinder 22 far from the ground. In this embodiment, the reflector 21 corresponding to the laser rangefinder 22 located at the top is the farthest from the column 43. At the same time, the reflector 21 corresponding to the laser rangefinder 22 located at the bottom is closest to the column 43. In this way, it is avoided that the laser beams emitted and received by multiple laser rangefinders 22 cross each other, which affects the detection result of the second acquisition device 2.

[0103] Preferably, if Figure 3 As shown, the angles between the multiple laser rangefinders 22 and the horizontal direction decrease from bottom to top, that is, the angle a1 is smaller than the angle a2, the angle a2 is smaller than the angle a3, and the angle a3 is smaller than the angle a4, so that the multiple laser rangefinders 22 can face the corresponding reflective slopes 211 respectively.

[0104] In some embodiments, Figure 2 and Figure 4 As shown, the first acquisition device 1 also includes an acquisition head 16, a second cable 14 and a control box 15. At the same time, the control box 15 is set at the bottom of the rail and between two sleepers. The control box 15 includes a second circuit board 152, a second main control chip 153 and a second ZIGBEE module 13. The second main control chip 153 and the second ZIGBEE module 13 are set on the second circuit board 152 and are communicatively connected.

[0105] This embodiment utilizes the area between the rail and two sleepers to accommodate the control box 15 , thereby reducing direct light exposure to the control box 15 and increasing the service life of the control box 15 .

[0106] Further reference Figure 2 and Figure 6 As shown, the acquisition head 16 is connected to the second main control chip 153 through the second cable 14. And the acquisition head 16 includes a third circuit board 161, a temperature sensor 11 and a strain gauge 12, and the third circuit board 161, the temperature sensor 11 and the strain gauge 12 are attached to the waist of the rail. The temperature sensor 11 and the strain gauge 12 are connected to the second cable 14 through the third circuit board 161. The operator can first install the control box 15 at the bottom of the rail, and then install the acquisition head 16 at the waist of the rail. The second cable 14 in this embodiment can facilitate the operator to mount the acquisition head 16 at a suitable position on the waist of the rail.

[0107] Preferably, after the collection head 16 is attached to the rail waist, protective glue can be applied to the collection head 16 to protect the collection head 16 from rain and sunlight to avoid damage to the collection head 16.

[0108] In some embodiments, Figure 4 and Figure 6 As shown, there are four strain gauges 12. The four strain gauges 12 include two first strain gauges 121 and two second strain gauges 122. The two first strain gauges 121 and the two second strain gauges 122 are arranged perpendicularly to each other, and the first strain gauge 121 is arranged along the length direction of the rail.

[0109] In this embodiment, the first strain gauge 121 is used to detect the deformation of the rail in the length direction, and the second strain gauge 122 is used to detect the deformation of the rail in the height direction. Therefore, the stress data collected by the first collection device 1 is more accurate.

[0110] Furthermore, the acquisition head 16 also includes a bridge module 162. The bridge module 162 is a Wheatstone bridge. The bridge module 162 includes a first bridge arm, a second bridge arm, a third bridge arm and a fourth bridge arm connected end to end in sequence, two first strain gauges 121 are respectively connected to the first bridge arm and the third bridge arm, and two second strain gauges 122 are respectively connected to the third bridge arm and the fourth bridge arm. That is, the four strain gauges 12 are respectively located on the four bridge arms of the Wheatstone bridge.

[0111] Preferably, the second main control chip 153 can collect the voltage signal of the Wheatstone bridge through a programmable amplifier circuit, so that the stress data collected by the second main control chip 153 is more accurate.

[0112] In some embodiments, Figure 2 and Figure 4 As shown, the first acquisition device 1 also includes a power supply box 17 and a third cable 18. The power supply box 17 is arranged at the bottom of the rail and between two sleepers, and the power supply box 17 is electrically connected to the control box 15 through the third cable 18. Therefore, the operator can simplify the disassembly and assembly process by replacing the power supply box 17 after the power of the first power source is exhausted.

[0113] In some embodiments, Figure 4 As shown, the temperature sensor 11 is a digital temperature sensor 11. The digital temperature sensor 11 has three pins electrically connected to the third circuit board 161. The digital temperature sensor 11 in this embodiment can be used in conjunction with a single-chip microcomputer to improve the detection accuracy of the temperature on the rail, so that the digital temperature sensor 11 occupies a smaller volume and has a lower cost.

[0114] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-power wireless stress rail temperature acquisition module, characterized in that: The low-power wireless stress rail temperature acquisition module includes: A data processing device (3), comprising a first ZIGBEE module (31) and a data uploading device (32); A first acquisition device (1), comprising a temperature sensor (11), a strain gauge (12) and a second ZIGBEE module (13), wherein the second ZIGBEE module (13) is wirelessly connected to the first ZIGBEE module (31) to transmit data acquired by the first acquisition device (1); and A second acquisition device (2) is communicatively connected to the data processing device (3) and comprises a plurality of reflective plates (21) and a plurality of laser rangefinders (22) corresponding to the plurality of reflective plates (21), wherein the reflective plates (21) have a reflective inclined surface (211); The reflective plate (21), the temperature sensor (11) and the strain gauge (12) are arranged on the waist of the rail, and the reflective plate (21) moves along with the rail, the second acquisition device (2) and the data processing device (3) are arranged on the same side of the rail, the sensing head of the laser rangefinder (22) faces the corresponding reflective inclined surface (211), and the data uploading device (32) receives and uploads the data collected by the first acquisition device (1) and the second acquisition device (2).

2. The low-power wireless stress rail temperature acquisition module according to claim 1 is characterized in that: The low-power wireless stress rail temperature acquisition module also includes: a plurality of first cables (5); and A mounting portion (4) is arranged on one side of the rail; The data processing device (3) and the plurality of laser rangefinders (22) are arranged on the mounting portion (4), and the data processing device (3) is communicatively connected with the plurality of laser rangefinders (22) via the plurality of the first cables (5).

3. The low-power wireless stress rail temperature acquisition module according to claim 2 is characterized in that: The data processing device (3) comprises a first circuit board (33) and a first main control chip (34); the data uploading device (32) comprises a GPRS chip and an antenna (321); The first main control chip (34) and the GPRS chip are arranged on the first circuit board (33); the first main control chip (34) is communicatively connected to the plurality of laser rangefinders (22); the GPRS chip is communicatively connected to the first main control chip (34) and the antenna (321); and the antenna (321) is arranged on the mounting portion.

4. The low-power wireless stress rail temperature acquisition module according to claim 3 is characterized in that: The mounting portion (4) comprises a main frame (41) and a side plate (42); the main frame (41) is arranged on a column (43) erected on one side of a steel rail, and the main frame (41) maintains a predetermined distance from the ground; the side plate (42) is arranged on a side of the main frame (41) close to the steel rail, and the length direction of the side plate (42) is parallel to the length direction of the column (43); A plurality of laser rangefinders (22) are disposed on the side plate (42) and are arranged at intervals along the length direction of the side plate (42).

5. The low-power wireless stress rail temperature acquisition module according to claim 4 is characterized in that: The reflector (21) corresponding to the laser rangefinder (22) close to the ground is closer to the column (43) than the reflector (21) corresponding to the laser rangefinder (22) far from the ground.

6. The low-power wireless stress rail temperature acquisition module according to claim 1 is characterized in that: The first acquisition device (1) further comprises: A second cable (14); A control box (15) is arranged at the bottom of the rail and between two sleepers, the control box (15) comprising a second circuit board (152), a second main control chip (153) and a second ZIGBEE module (13), the second main control chip (153) and the second ZIGBEE module (13) being arranged on the second circuit board (152) and in communication connection; and A collection head (16) is communicatively connected to the second main control chip (153) via the second cable (14) and comprises a third circuit board (161), the temperature sensor (11) and the strain gauge (12); the third circuit board (161), the temperature sensor (11) and the strain gauge (12) are attached to the waist of the rail; the temperature sensor (11) and the strain gauge (12) are communicatively connected to the second cable (14) via the third circuit board (161).

7. The low-power wireless stress rail temperature acquisition module according to claim 6 is characterized in that: The number of the strain gauges (12) is four, and the four strain gauges (12) include two first strain gauges (121) and two second strain gauges (122). The arrangement directions of the two first strain gauges (121) and the two second strain gauges (122) are perpendicular to each other, and the first strain gauges (121) are arranged along the length direction of the rail.

8. The low-power wireless stress rail temperature acquisition module according to claim 7 is characterized in that: The acquisition head (16) further comprises a bridge module (162), the bridge module (162) comprising a first bridge arm, a second bridge arm, a third bridge arm and a fourth bridge arm connected end to end in sequence, the two first strain gauges (121) being respectively connected to the first bridge arm and the third bridge arm, and the two second strain gauges (122) being respectively connected to the third bridge arm and the fourth bridge arm.

9. The low-power wireless stress rail temperature acquisition module according to claim 6 is characterized in that: The first acquisition device (1) further comprises a power supply box (17) and a third cable (18); the power supply box (17) is arranged at the bottom of the rail and between two sleepers; the power supply box (17) is electrically connected to the control box (15) via the third cable (18).

10. The low-power wireless stress rail temperature acquisition module according to claim 6, characterized in that: The temperature sensor (11) is a digital temperature sensor having three pins electrically connected to the third circuit board (161).

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