A trench cover plate with embedded sensor wire

Abstract

The present invention provides a trench cover plate with embedded sensor wires, the trench cover plate comprising a cover plate upper portion, a sensor wire embedded in the cover plate upper portion, and a sensor wire connector connected to the sensor wire and extending from the lower end surface of the cover plate upper portion, wherein the distance between the sensor wire and the top surface of the cover plate upper portion is 7 / 10‑4 / 5 of the thickness of the cover plate upper portion; the sensor wire in the trench cover plate has a very high detection sensitivity, and the sensor wire is not easy to break during the preparation process.

Description

Technical Field

[0001] The invention belongs to the technical field of channel cover plates, and in particular relates to a channel cover plate with pre-embedded sensor lines. Background Art

[0002] There are a large number of cable and optical cable trenches in power generation facilities. In order to ensure the safety of the cables and optical cables in the trenches, avoid aging caused by direct sunlight, and prevent rain, dust, and debris from falling into the trenches, it is necessary to install protective trench covers on the trenches. Existing trench covers are made of cement reinforced concrete and polymer composite materials, but they are very easy to be damaged due to long-term exposure to the outside and long-term mechanical forces such as rolling, handling, and prying. In addition, the staff conducts regular inspections and it is not easy to detect the damage of the trench cover in time. In order to detect the damage of the trench cover, CN110095504A and CN111089716A disclose a trench cover that can be used to monitor the damage and opening status of the trench cover. However, the detection sensitivity of the pre-buried sensor line in the above-mentioned trench cover disclosed in the prior art is low. How to improve the detection sensitivity of the pre-buried sensor line is a problem that needs to be solved urgently. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a channel cover plate for pre-embedded sensor lines.

[0004] One of the technical solutions of the present invention provides a channel cover plate with embedded sensor wires, the channel cover plate comprising an upper cover plate, a sensor wire embedded in the upper cover plate, a sensor wire connector connected to the sensor wire and extending from the lower end surface of the upper cover plate, and the distance between the sensor wire and the top surface of the upper cover plate is 7 / 10-4 / 5 of the thickness of the upper cover plate.

[0005] The position of the pre-embedded sensor line in the channel cover plate should be appropriate. If the pre-embedded sensor line is too biased towards the top surface of the upper part of the cover plate, there will be a problem of low detection sensitivity. If it is too biased towards the bottom surface of the upper part of the cover plate, the sensor line may break first when the deformation of the channel cover plate is not enough to be damaged. Therefore, the present application selects the position of the pre-embedded sensor line in the upper part of the cover plate to be 7 / 10-4 / 5 of the thickness of the upper part of the cover plate from the top surface of the upper part of the cover plate, which can ensure that the pre-embedded sensor line has sufficiently large tensile force and good enough grip to improve the detection sensitivity; and avoids the situation where the sensor line breaks first when the deformation of the channel cover plate is insufficient.

[0006] In a further improved solution, the sensing line is tightly combined with the cover plate material constituting the upper part of the cover plate.

[0007] The sensing wire and the cover plate material are limited to be tightly combined, which can ensure that when the channel cover plate is deformed, the sensing wire can be broken under the action of tension, thereby realizing the detection of the damage of the channel cover plate.

[0008] In a further improved solution, the channel cover plate also includes a lower portion of the cover plate, in which a steel mesh is embedded, and the steel mesh is composed of a plurality of steel grids; the steel mesh divides the lower portion of the cover plate into a plurality of hollow grids, and the sensing line is equidistant from the upper portion of the cover plate.

[0009] Arranging a steel mesh at the bottom of the cover plate can improve the damage resistance of the channel cover plate.

[0010] In a further improved solution, the distance between the sensor wire connector and the four sides of the hollow grid is greater than 0.5 cm, preferably 3-5 cm, and the height of the portion of the sensor wire connector extending from the lower end surface of the upper cover is not higher than the lower part of the cover.

[0011] The distance between the sensor wire connector and the hollow grid should be 3-5cm to facilitate construction. In order to prevent collision of the sensor wire connector and improve detection sensitivity, the height of the extended part of the sensor wire connector should not be higher than the lower part of the cover.

[0012] In a further improved solution, the sensing line and the steel bars are not arranged on the same longitudinal section.

[0013] The sensing line should be arranged in an outer circle and cannot be arranged on the same longitudinal section as the steel bars. When the trench cover is damaged, the sensing line can be guaranteed to break.

[0014] In a further improved solution, the sensing line is located at 2 / 5-3 / 5 of the length of the outermost hollow grid around the lower part of the cover plate.

[0015] The sensing line located at this position has a higher detection sensitivity.

[0016] In a further improved solution, the ratio of the thickness of the upper portion of the cover plate to the thickness of the lower portion of the cover plate is 1:2.

[0017] In a further improved solution, the cross-sectional diameter of the sensing wire is 0.1-2 mm.

[0018] In a further improved solution, the resistance of the sensing line is less than 1Ω.

[0019] By limiting the resistance value and cross-sectional diameter of the sensing wire, it is ensured that the sensing wire not only has high detection sensitivity but also will not break during the preparation process.

[0020] In a further improved solution, when the channel cover plate meets the following conditions, the sensor line embedded in the upper part of the cover plate is disconnected:

[0021] The trench cover has a through crack greater than 20 cm long.

[0022] The channel cover produces an area greater than 50cm2 The potholes,

[0023] Or the channel cover plate has a depression greater than 3 cm.

[0024] When the channel cover plate encounters the above situation, the channel cover plate is damaged and can no longer be used safely. Therefore, the internal embedded sensor line must be disconnected and should remain connected at other times.

[0025] The beneficial effects of the present invention are as follows: the present invention provides a channel cover plate with embedded sensor wires, the sensor wires embedded in the channel cover plate have very high detection sensitivity, and the sensor wires are not easy to break during the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional perspective view of a trench cover plate for pre-embedded sensor wires;

[0027] Figure 2 A bottom perspective view of a trench cover plate for pre-embedded sensor wires;

[0028] Figure 3 for Figure 2 Cross-section of the middle AA;

[0029] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0030] Figure 5 for Figure 3 The enlarged view of point B in the middle;

[0031] Figure 6 This is an enlarged view of the aviation joint;

[0032] Figure 7 is a longitudinal section view of the upper part of the cover plate;

[0033] Figure 8 It is a three-dimensional diagram of the mold under the cover. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and the following embodiments.

[0035] Example 1

[0036] The first embodiment of the present invention provides a trench cover plate for pre-embedded sensor wires, such as Figure 1 and Figure 2As shown in the figure, the channel cover plate includes a cover plate upper portion 10, a cover plate lower portion 20, a sensor line 30 embedded in the cover plate upper portion, a sensor line connector 40 connected to the sensor line 30 and extending from the lower end surface of the cover plate upper portion 10, and a steel mesh (not shown in the figure) embedded in the cover plate lower portion 20, wherein the steel mesh is composed of a plurality of steel meshes; the steel mesh divides the cover plate lower portion 20 into a plurality of hollow meshes 41, and the hollow meshes are preferably square structures, such as Figure 4 As shown, the sensing line connector 40 is located in the hollow grid, wherein the sensing line connector is preferably a metal aviation connector with a dust cover, and the structure of the aviation connector is as follows Figure 6 As shown, continue to refer to Figure 2 The distance H between the sensing line connector 40 and the periphery of the hollow grid 5 3cm, which is convenient for construction. The height of the sensor line 30 connector extending from the lower end surface of the upper cover plate 10 is not higher than the lower cover plate 20, which is not only convenient for transportation, but also prevents collision of the sensor line connector; Figure 3 and Figure 5 As shown, the distance H between the sensing line 30 and the top surface of the cover plate upper portion 10 is 1 3 / 4 of the upper thickness H of the cover plate 2 , continue to refer to Figure 2 The distance H between the sensing line 30 and the upper part of the cover plate is 3 Equal, located at the outermost hollow grid 41 length H around the lower part of the cover 4 The cross-sectional diameter of the sensing wire is 1 mm, and the resistance is less than 1Ω. The ratio of the thickness of the upper cover plate to the thickness of the lower cover plate is 1:2. The cover plate material is cement.

[0037] The channel cover provided by the present invention limits the layout of the sensor line position, and the sensor line and the upper part of the cover are tightly wrapped, thereby significantly improving the detection sensitivity of the sensor line in the channel cover. During specific detection, the sensor line connector is connected to the detection device through another male head to detect the damage or opening status of the cover. The structure of the detection device refers to the contents disclosed in CN110095504A or CN111089716A; and when the channel cover meets the following conditions, the sensor line pre-buried in the upper part of the cover is disconnected, and the rest must be a passage.

[0038] The trench cover has a through crack greater than 20 cm long.

[0039] The channel cover produces an area greater than 50cm 2 potholes, or

[0040] The channel cover plate produces a depression greater than 3 cm.

[0041] Example 2

[0042] The second embodiment of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the first embodiment, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 7 / 10 of the upper thickness of the cover plate H 2 The sensing line 30 is located at the outermost hollow grid 41 around the lower part of the cover plate, and the length is H 4 At the 3 / 5 position, the cross-sectional diameter of the sensing wire is 1 mm, and the distance between the sensing wire connector 40 and the surrounding of the hollow grid is 5 cm.

[0043] Example 3

[0044] The third embodiment of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the first embodiment, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 4 / 5 of the upper thickness of the cover plate H 2 The sensing line is located at the outermost hollow grid 41 around the lower part of the cover plate, and the length is H 4 At the 2 / 5 position, the cross-sectional diameter of the sensing wire is 1 mm, and the distance between the sensing wire connector 40 and the surrounding of the hollow grid is 4 cm.

[0045] Example 4

[0046] The fourth embodiment of the present invention provides a trench cover plate for pre-embedded sensor wires. The structure of the trench cover plate is the same as that of the first embodiment. The cross-sectional diameter of the sensor wires is 0.5 mm.

[0047] Example 5

[0048] The fifth embodiment of the present invention provides a channel cover plate for pre-embedded sensor wires. The structure of the channel cover plate is the same as that of the first embodiment. The cross-sectional diameter of the sensor wires is 0.1 mm.

[0049] Example 6

[0050] The sixth embodiment of the present invention provides a channel cover plate for pre-embedded sensor wires. The structure of the channel cover plate is the same as that of the first embodiment. The cross-sectional diameter of the sensor wires is 2 mm.

[0051] Example 7

[0052] The seventh embodiment of the present invention provides a trench cover plate for pre-embedded sensor wires. The trench cover plate is based on the first embodiment, wherein the cross-sectional diameter of the sensor wire is 1 mm, and the cover plate material is a composite material, wherein the composite material is composed of the following components by weight: 1 part of resin, 5 parts of sand and gravel, 2 parts of glass fiber, and 3 parts of water. Selecting the composite material as the material for the trench cover plate not only improves the compressive strength and damage resistance of the trench cover plate, but also reduces the deformation of the sensor wire during the preparation process, thereby indirectly improving the sensitivity of the sensor wire.

[0053] Example 8

[0054] An eighth embodiment of the present invention provides a method for preparing a trench cover plate for pre-embedded sensing lines, wherein the upper portion of the cover plate is composed of a first layer of cover plate matrix and a second layer of cover plate matrix, and the method comprises the following steps:

[0055] 1) Take a cover plate lower mold with blind holes and multiple grooves arranged horizontally and vertically on the top surface; the structural schematic diagram of the cover plate lower mold is as follows Figure 8 As shown, the mesh size formed by the grooves matches the size of the steel bar mesh;

[0056] 2) Place the steel mesh in the groove of the mold under the cover plate;

[0057] 3) placing a portion of the cover plate material on the lower cover plate mold, reserving the position of the blind hole, compressing and flattening it with a hydraulic press to form a first layer of cover plate matrix and a lower part of the cover plate composed of a plurality of hollow grids;

[0058] 4) Place the sensing line at a distance of H from the outermost hollow grid around the bottom of the cover. 4 At the 1 / 2 position of the sensor cable, insert the sensor cable connector into the blind hole;

[0059] 5) Laying out another portion of the cover material to form a second layer of cover substrate, and laying it on the first layer of cover substrate and the sensing line;

[0060] The cover material is cement, and another part of the cement is placed on the tray and flattened according to the size of the channel cover to form a second layer of cover matrix, which is then smoothly poured onto the first layer of cover matrix and the sensor line;

[0061] 6) The hydraulic press compresses the first layer of cover plate matrix, the sensing wire and the second layer of cover plate matrix on the lower mold of the cover plate; and solidifies.

[0062] The compression and curing pressure and time can be adjusted according to the production situation. Specifically, it is preferred to use a 50-ton hydraulic press for compression, a pressure of 20 tons, and a curing time of 5 minutes.

[0063] When placing the cover material, the thickness ratio of the first cover matrix and the second cover matrix prepared by calculation and placement of a part of the cover material and another part of the cover material is 1:3. The first cover matrix and the second cover matrix are firstly flattened. Therefore, in the curing process of forming the channel cover, the thickness loss of the first cover matrix and the second cover matrix can be ignored. The thickness ratio of the first cover matrix and the second cover matrix is ​​limited to ensure that the distance H between the sensing line and the top surface of the upper 10 of the cover is 1 3 / 4 of the upper thickness H of the cover plate 2 ;

[0064] The preparation method of the channel cover plate for pre-embedded sensor lines of the present invention first flattens the cover plate material forming the upper part of the cover plate, thereby reducing the fluidity during the subsequent curing process of the channel cover plate and reducing the displacement of the sensor line during the curing process, thereby significantly reducing the cross-sectional diameter of the pre-embedded sensor line and improving the sensitivity during the detection process.

[0065] Example 9

[0066] A ninth embodiment of the present invention provides a method for preparing a trench cover plate for pre-embedded sensing lines, wherein the upper portion of the cover plate is composed of a first layer of cover plate matrix and a second layer of cover plate matrix, and the method comprises the following steps:

[0067] 1) Take a cover plate lower mold with blind holes and multiple grooves arranged horizontally and vertically on the top surface; the structural schematic diagram of the cover plate lower mold is as follows Figure 8 As shown, the mesh size formed by the grooves matches the size of the steel bar mesh;

[0068] 2) Place the steel mesh in the groove of the mold under the cover plate;

[0069] 3) placing a portion of the cover plate material on the lower cover plate mold, reserving the position of the blind hole, compressing and flattening it with a hydraulic press to form a first layer of cover plate matrix and a lower part of the cover plate composed of a plurality of hollow grids;

[0070] 4) Place a filling plug in the blind hole of the mold under the cover plate;

[0071] 5) Place the wire slot frame on the first cover substrate;

[0072] The wire trough frame is located at the outermost hollow grid length H around the lower part of the cover plate. 4 1 / 2 position;

[0073] 6) The hydraulic press compresses the first layer of cover plate matrix and the wire groove frame on the lower mold of the cover plate to form a wire groove;

[0074] The size of the wire slot matches the size of the sensor line, and the distance between the wire slot and the top surface of the cover is 3 / 4 of the thickness H of the cover.2 , where the thickness loss of the first and second cover plate matrices during compression is negligible;

[0075] 7) Raise the hydraulic press and remove the wire trough frame and filling plug;

[0076] 8) Place the sensor wire in the formed wire slot and insert the sensor wire connector into the blind hole;

[0077] 9) Laying out another portion of the cover material to form a second layer of cover substrate, and laying it on the first layer of cover substrate and the sensing line;

[0078] The cover material is cement, and another part of the cement is placed on the tray and flattened according to the size of the channel cover to form a second layer of cover matrix, which is then smoothly poured onto the first layer of cover matrix and the sensor line;

[0079] The first layer of the cover substrate and the second layer of the cover substrate are firstly flattened, so the thickness loss of the first layer of the cover substrate and the second layer of the cover substrate can be ignored during the curing process of forming the channel cover substrate; the ratio of the thickness of the first layer of the cover substrate to the thickness of the second layer of the cover substrate is determined according to the position of the sensing wire placed in the wire groove, and any ratio of the thickness of the first layer of the cover substrate to the second layer of the cover substrate is within the scope of protection of the present invention as long as the distance between the sensing wire placed in the wire groove and the top surface of the upper part of the cover substrate is 3 / 4 of the thickness of the upper part of the cover substrate;

[0080] 10) The hydraulic press compresses the first layer of cover plate matrix, the sensing wire and the second layer of cover plate matrix on the lower mold of the cover plate; and solidifies.

[0081] By setting the wire groove, the deformation of the sensor wire during the preparation of the channel cover plate is reduced, and the sensitivity of the sensor wire detection is further improved.

[0082] Example 10

[0083] A tenth embodiment of the present invention provides a method for preparing a trench cover plate for pre-embedded sensing lines, wherein the upper portion of the cover plate is composed of a cover plate matrix, and the method comprises the following steps:

[0084] 1) Take a lower mold of the cover plate with a blind hole and a plurality of grooves arranged horizontally and vertically on the top surface; the structural schematic diagram of the lower mold of the cover plate is as follows Figure 8 As shown, the mesh size formed by the grooves matches the size of the steel bar mesh;

[0085] 2) Place the steel mesh in the groove of the mold under the cover plate;

[0086] 3) placing the cover plate material on the cover plate lower mold, reserving the position of the blind hole, and paving it to form the upper cover plate and the lower cover plate composed of multiple hollow grids;

[0087] 4) Place a filling plug in the blind hole of the mold under the cover plate;

[0088] 5) Place the wire trough frame on the upper part of the cover;

[0089] The wire trough frame is located at the outermost hollow grid length H around the lower part of the cover plate. 4 1 / 2 position;

[0090] 6) The hydraulic press compresses the cover plate matrix and the wire groove frame on the lower mold of the cover plate to form a wire groove;

[0091] The size of the wire slot matches the size of the sensor line, and the distance between the bottom of the wire slot and the top surface of the cover plate is 3 / 4 of the thickness H of the upper cover plate. 2 ;

[0092] 7) Raise the hydraulic press and remove the wire trough frame and filling plug;

[0093] 8) Place the sensor wire in the formed wire slot and insert the sensor wire connector into the blind hole;

[0094] 10) The hydraulic press compresses the mold under the cover plate; solidifies.

[0095] Embodiment 11

[0096] The eleventh embodiment of the present invention provides a method for preparing a trench cover plate for pre-embedded sensing lines, wherein the upper portion of the cover plate is composed of a first layer of cover plate matrix and a second layer of cover plate matrix, and the method comprises the following steps:

[0097] 1) Take the lower mold of the cover plate with blind holes and multiple grooves arranged horizontally and vertically on the top surface and preheat them to 180°C; the structural schematic diagram of the lower mold of the cover plate is as follows Figure 6 As shown, the mesh size formed by the grooves matches the size of the steel bar mesh;

[0098] 2) Place the steel mesh in the groove of the mold under the cover plate;

[0099] 3) placing a portion of the cover plate material on the cover plate lower mold, reserving the position of the blind hole, compressing and flattening it with a hydraulic press to form a first layer of cover plate matrix and a lower part of the cover plate composed of a plurality of hollow grids;

[0100] 4) Place the sensing line at a distance of H from the outermost hollow grid around the bottom of the cover. 4 At the 1 / 2 position of the sensor cable, insert the sensor cable connector into the blind hole;

[0101] 5) Laying out another portion of the cover material to form a second layer of cover substrate, and laying it on the first layer of cover substrate and the sensing line;

[0102] The cover material is a composite material, which is composed of the following components by weight: 1 part of resin, 5 parts of sand and gravel, 2 parts of glass fiber and 3 parts of water; another part of the composite material is placed on a tray, flattened according to the size of the channel cover to form a second layer of cover matrix, and then smoothly poured on the first layer of cover matrix and the sensor line;

[0103] Wherein, the ratio of the thickness of the first cover substrate matrix to the second cover substrate matrix is ​​1:3;

[0104] 6) The hydraulic press compresses and solidifies the first layer of the cover plate matrix, the sensing wire and the second layer of the cover plate matrix on the lower mold of the cover plate;

[0105] The compression and curing pressure and time can be adjusted according to the production situation. Specifically, it is preferred to use a 50-ton hydraulic press for compression, a pressure of 20 tons, and a curing time of 5 minutes.

[0106] Selecting composite materials as the material of the channel cover not only improves the compressive strength and damage resistance of the channel cover, but also reduces the deformation of the sensor line during the preparation process, thereby indirectly improving the sensitivity of the sensor line.

[0107] Comparative Example 1

[0108] The first comparative example of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the embodiment 1, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 The upper thickness of the cover plate is 13 / 20 2 The distance H between the sensing line 30 and the upper part 10 of the cover plate is 3 Equal, located at the outermost hollow grid 41 length H around the lower part of the cover 4 At the 1 / 2 position, the cross-sectional diameter of the sensing wire is 2mm.

[0109] Comparative Example 2

[0110] The first comparative example of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the embodiment 1, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 The upper thickness of the cover plate is 17 / 20 2 The distance H between the sensing line 30 and the upper part 10 of the cover plate is 3 Equal, located at the outermost hollow grid 41 length H around the lower part of the cover 4 At the 1 / 2 position, the cross-sectional diameter of the sensing wire is 2mm.

[0111] Comparative Example 3

[0112] The first comparative example of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the embodiment 1, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 3 / 4 of the upper thickness H of the cover plate 2 The distance H between the sensing line 30 and the upper part 10 of the cover plate is 3 Equal, located at the outermost hollow grid 41 length H around the lower part of the cover 4 At the 3 / 10 position, the cross-sectional diameter of the sensing wire is 2 mm.

[0113] Comparative Example 4

[0114] The first comparative example of the present invention provides a trench cover plate with embedded sensor wires. The trench cover plate is based on the embodiment 1, and the distance H between the sensor wire 30 and the top surface of the cover plate upper portion 10 is 1 3 / 4 of the upper thickness H of the cover plate 2 The distance H between the sensing line 30 and the upper part 10 of the cover plate is 3 Equal, located at the outermost hollow grid 41 length H around the lower part of the cover 4 At the 7 / 10 position, the cross-sectional diameter of the sensing wire is 2 mm.

[0115] Comparative Example 5

[0116] A fifth comparative example of the present invention provides a channel cover plate, the structure of the channel cover plate is the same as that of Example 1, and the cross-sectional diameter of the sensing line is 1 mm; the channel cover plate is prepared by the following method:

[0117] 1) Take a lower mold of the cover plate with a blind hole and a plurality of grooves arranged horizontally and vertically on the top surface; the structural schematic diagram of the lower mold of the cover plate is as follows Figure 8 As shown, the mesh size formed by the grooves matches the size of the steel bar mesh;

[0118] 2) Place the steel mesh in the groove of the mold under the cover plate;

[0119] 3) laying a portion of the cover plate material on the cover plate lower mold, reserving positions for blind holes, and forming a first layer of the cover plate matrix and a lower portion of the cover plate consisting of a plurality of hollow grids;

[0120] 4) Place the sensing line at a distance of H from the outermost hollow grid around the bottom of the cover. 4 At the 1 / 2 position of the sensor cable, insert the sensor cable connector into the blind hole;

[0121] 5) Laying another portion of cover material on the first cover substrate and the sensing line to form a second cover substrate; the thickness ratio of the first cover substrate and the second cover substrate is 1:3;

[0122] 6) The hydraulic press compresses the first layer of cover plate matrix, the sensing wire and the second layer of cover plate matrix on the lower mold of the cover plate; and solidifies.

[0123] The compression and curing pressure and time can be adjusted according to the production situation. Specifically, it is preferred to use a 50-ton hydraulic press for compression, a pressure of 20 tons, and a curing time of 5 minutes. The cover plate is made of cement.

[0124] Experimental Example 1 Sensitivity Experiment

[0125] The channel cover plates of the embodiments and the control examples were pressed down in multiple stages using a hydraulic press, and the resistance of the sensing wire in the channel cover plate was measured using a multimeter. When the resistance changed significantly, the depth of the cover plate sinking was recorded. The results are shown in Table 1.

[0126] Table 1 Sensitivity test results

[0127]

[0128] From the above results, it can be concluded that if the cover material is not flattened during the preparation process, the sensor line will easily break during the preparation process, and thicker sensor lines will be needed, but the detection sensitivity will be significantly reduced; and the pre-buried position of the sensor line will also affect the sensitivity of the sensor line detection.

[0129] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A trench cover plate with embedded sensor wires, the trench cover plate comprising a cover plate upper portion, a sensor wire embedded in the cover plate upper portion, and a sensor wire connector connected to the sensor wire and extending from the lower end surface of the cover plate upper portion, characterized in that: The distance between the sensing line and the top surface of the upper portion of the cover plate is 7 / 10-4 / 5 of the thickness of the upper portion of the cover plate; The sensing line is tightly combined with the cover plate material constituting the upper part of the cover plate; The channel cover plate also includes a lower portion of the cover plate, in which a steel mesh is pre-embedded, and the steel mesh is composed of a plurality of steel meshes; the steel mesh divides the lower portion of the cover plate into a plurality of hollow meshes, and the sensor line connector is located in the hollow meshes; the sensor line is at an equal distance from the upper portion of the cover plate; When the trench cover plate meets the following conditions, the sensor line embedded in the upper part of the cover plate is disconnected: a through crack greater than 20 cm long is generated in the trench cover plate, The channel cover produces an area greater than 50cm 2 The potholes, Or the channel cover plate has a depression greater than 3 cm.

2. The trench cover plate for pre-embedded sensor wires according to claim 1, characterized in that: The distance between the sensing wire connector and the four sides of the hollow grid is greater than 0.5 cm, and the height of the portion of the sensing wire connector extending from the lower end surface of the upper portion of the cover plate is not higher than the lower portion of the cover plate.

3. The trench cover plate for pre-embedded sensor wires according to claim 1, characterized in that: The sensing line and the steel bars are not arranged on the same longitudinal section.

4. The trench cover plate for pre-embedded sensor wires according to claim 1, characterized in that: The sensing line is located at 2 / 5-3 / 5 of the length of the outermost hollow grid around the lower part of the cover plate.

5. The trench cover plate for pre-embedded sensor wires according to claim 1, characterized in that: The ratio of the thickness of the upper portion of the cover plate to the thickness of the lower portion of the cover plate is 1:

2.

6. The trench cover plate for pre-embedded sensor wires according to claim 1, characterized in that: The cross-sectional diameter of the sensing wire is 0.1-2 mm.

7. The trench cover plate for pre-embedded sensor wires according to claim 6, characterized in that: The resistance of the sensing line is less than 1Ω.

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