Weak fiber grating array asphalt pavement deformation monitoring system and laying system
By laying sensors based on fiber grating arrays on the asphalt pavement, the shortcomings of asphalt pavement monitoring sensors in the prior art in terms of high temperature and durability are solved, and accurate monitoring and evaluation of road deformation is achieved.
Patent Information
- Application Number
- CN202411758098.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-02-28
AI Technical Summary
Existing asphalt pavement monitoring sensors lack the ability to withstand high temperatures, durability and coordinated deformation, making it difficult to effectively monitor the deformation of the long-distance structure of the asphalt pavement.
The asphalt pavement monitoring system based on fiber grating array sensing is adopted, including the weak fiber grating array asphalt pavement sensor and layout system. The sensor consists of a fluoroelastic inner core layer and a butyl rubber shell layer. The two weak fiber grating arrays are distributed up and down in the thickness direction of the asphalt pavement. The wavelength difference is read through the analyzer to evaluate the deformation of the pavement.
It realizes coordinated deformation with asphalt pavement in high temperature environments, can effectively identify the deformation direction of the pavement and calculate the deformation value, and improves the accuracy and reliability of asphalt pavement monitoring.
Smart Images
Figure CN119531281A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of grating sensors. Background Art
[0002] Asphalt pavement has the advantages of smooth surface, no joints, good wear resistance, low vibration, low noise, short construction period, simple maintenance and repair, and beautiful appearance. It is widely used in road construction, especially in places such as highways and airport runways that require high-quality pavement. Asphalt pavement has damages such as rutting, uneven settlement, and cracking during service, which affects the comfort and safety of vehicle driving. Due to the high pouring temperature of asphalt pavement and the lower elastic modulus than concrete pavement, the current asphalt pavement monitoring sensor lacks in resistance to high temperature, durability, and coordinated deformation ability. Weak fiber grating array is a sensitive element that engraves thousands of weak fiber gratings on ordinary optical fibers. It is suitable for deformation monitoring of long-distance structures such as pavements. Summary of the invention
[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an asphalt pavement deformation monitoring system and deployment system of a weak fiber grating array, which is suitable for deformation monitoring of long-distance structures such as pavements.
[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides an asphalt pavement monitoring system based on fiber grating array sensing, including a weak fiber grating array asphalt pavement sensor, and the weak fiber grating array asphalt pavement sensor is arranged in the asphalt pavement;
[0005] The weak fiber grating array asphalt pavement sensor is in the shape of a cable, and the weak fiber grating array asphalt pavement sensor includes a fluororubber inner core layer, and the fluororubber inner core layer is covered with a butyl rubber outer shell layer; two weak fiber grating arrays are placed in parallel in the fluororubber inner core layer; the two parallel weak fiber grating arrays are respectively recorded as an upper weak fiber grating array and a lower weak fiber grating array; in the working state, the upper weak fiber grating array and the lower weak fiber grating array are distributed up and down in the thickness direction of the asphalt pavement.
[0006] Furthermore, the upper weak fiber grating array and the lower weak fiber grating array in the weak fiber grating array asphalt pavement sensor are connected in series and connected to a weak fiber grating analyzer, and the weak fiber grating analyzer reads the wavelength of the weak fiber grating array and is read into the asphalt pavement deformation evaluation module.
[0007] Furthermore, when the asphalt pavement is deformed, the asphalt pavement deformation evaluation module evaluates the pavement deformation direction and pavement deformation size based on the wavelength difference between the upper and lower corresponding points of the weak fiber grating array and the lower weak fiber grating array in the weak fiber grating array asphalt pavement sensor.
[0008] Furthermore, the outer skin of the cable-shaped weak fiber grating array asphalt pavement sensor is provided with a laying guide groove along the length extension direction; when the cable-shaped weak fiber grating array asphalt pavement sensor is in the laying state, the laying guide groove is parallel to the upper part of the weak fiber grating array.
[0009] Furthermore, it also includes an advance counterweight laying belt, which is a belt-shaped structure with a certain thickness. A horizontal glue groove with a semicircular cross-section is extended along the length direction on the upper side of the advance counterweight laying belt, and the inner diameter of the horizontal glue groove is the same as the outer diameter of the weak fiber grating array asphalt pavement sensor.
[0010] Furthermore, the advance counterweight placement belt consists of a butyl rubber outer layer and a counterweight inner layer, the butyl rubber outer layer is wrapped around the counterweight inner layer, and the counterweight inner layer is a flexible composite counterweight material with counterweight aggregate mixed in a rubber base.
[0011] Furthermore, in the laying state, the cable-shaped weak fiber grating array asphalt pavement sensor lies in the lying glue groove along the length direction, the inner wall of the lying glue groove and the outer wall of the cable-shaped weak fiber grating array asphalt pavement sensor are glued with quick-drying glue, and the laying guide groove of the cable-shaped weak fiber grating array asphalt pavement sensor faces upward.
[0012] Further, the sensor deployment system of the asphalt pavement monitoring system based on fiber grating array sensing:
[0013] It comprises a sensor laying vehicle capable of moving along the laying direction, wherein the lower part of the frame of the laying vehicle is connected with a front rolling arm and a rear rolling arm extending obliquely forward; the ends of the front rolling arm and the rear rolling arm are respectively rotatably mounted with a leading rolling wheel and a trailing rolling wheel through bearings; a glue injection device is arranged between the leading rolling wheel and the trailing rolling wheel, and the glue injection head of the glue injection device faces downward; as shown in the figure, the outer ring of the leading rolling wheel has a circle of a constraint groove with a width consistent with the width of the leading counterweight laying belt, and the outer ring of the trailing rolling wheel has a b rolling constraint groove with a width consistent with the outer diameter of the weak fiber grating array asphalt pavement sensor, and an annular constraint convex ring is coaxially arranged in the middle section of the inner wall; when the cable-shaped weak fiber grating array asphalt pavement sensor crosses the b rolling constraint groove of the trailing rolling wheel, the annular constraint convex ring at the crossing position is inserted into the laying guide groove on the weak fiber grating array asphalt pavement sensor.
[0014] , according to the sensor deployment system of the asphalt pavement monitoring system based on fiber grating array sensing, characterized in that:
[0015] Preparation: First, lay a certain thickness of asphalt on the road surface to form a bottom asphalt paving layer; the advance counterweight laying belt led obliquely downward from the paving vehicle crosses the front lower side of the advance rolling wheel and then extends backward and is horizontally laid on the surface of the bottom asphalt paving layer; at the same time, the cable-shaped weak fiber grating array asphalt pavement sensor led obliquely downward crosses the front lower side of the advance rolling wheel and lies along the length direction in the lying glue groove of the advance counterweight laying belt horizontally laid on the bottom asphalt paving layer;
[0016] Then the laying vehicle is controlled to move forward slowly, and at the same time, the glue injection head of the glue injection device slowly drips quick-drying glue into the lying glue joint groove of the counterweight laying belt below;
[0017] After the deployment is completed, asphalt is used to carefully fill and compact the integrated structure consisting of the deployed cable-shaped weak fiber grating array asphalt pavement sensor and the advance counterweight deployment belt.
[0018] Beneficial effects: The effects and benefits of the present invention are that the weak fiber grating array asphalt pavement sensor encapsulated by fluororubber and butyl rubber engages with the asphalt aggregate under the high temperature of asphalt pouring, thereby achieving coordinated deformation with the asphalt pavement, and the road deformation direction is identified and the corresponding deformation value is calculated through the wavelength difference of the corresponding points of the two weak fiber grating arrays in the sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The schematic diagram of the asphalt pavement monitoring system based on weak fiber grating array sensing of the present invention is shown in FIG.
[0020] Figure 2 It is a schematic diagram of the structure of the weak fiber grating array asphalt pavement sensor of the present invention.
[0021] Figure 3 It is a schematic diagram of asphalt pavement deformation evaluation based on weak fiber grating array asphalt pavement sensor of the present invention.
[0022] Figure 4 It is a cross-sectional view of the weak fiber grating array asphalt pavement sensor in the paving state and the advance counterweight laying belt being integrated;
[0023] Figure 5 It is a schematic diagram of the layout process under the front view;
[0024] Figure 6 for Figure 5 Stereoscopic image of
[0025] Figure 7 It is a schematic diagram of the rear rolling wheel structure. DETAILED DESCRIPTION
[0026] The present invention will be further described below in conjunction with the accompanying drawings.
[0027] As attached Figures 1 to 7 An asphalt pavement monitoring system based on fiber grating array sensing is shown in FIG. Figure 1 , including a weak fiber grating array asphalt pavement sensor 1, a weak fiber grating analyzer 2 and an asphalt pavement deformation evaluation module 3. The weak fiber grating array asphalt pavement sensor 1 is arranged in the asphalt pavement, the weak fiber grating analyzer 2 collects the wavelength value of the weak fiber grating array pavement sensor 1, and the collected wavelength value is transmitted to the asphalt pavement deformation evaluation module 3; the weak fiber grating analyzer 2 reads the wavelength value of the weak fiber grating array asphalt pavement sensor 1 and transmits it to the asphalt pavement deformation evaluation module 3 to carry out asphalt pavement deformation evaluation.
[0028] The weak fiber grating array asphalt pavement sensor 1 is in the shape of a cable. The weak fiber grating array asphalt pavement sensor 1 comprises a fluororubber inner core layer 1-2, and the fluororubber inner core layer 1-2 is coated with a butyl rubber outer shell layer 1-3; two weak fiber grating arrays 1-1 are placed in parallel in the fluororubber inner core layer 1-2; the two parallel weak fiber grating arrays 1-1 are respectively recorded as an upper weak fiber grating array 1-1a and a lower weak fiber grating array 1-1b;
[0029] The outer diameter of the fluororubber inner core layer 1-2 is 5mm, the butyl rubber outer shell layer 1-3 is outside the fluororubber inner core layer 1-2, and its outer diameter is 1.5mm. The molding process of the fluororubber inner core layer 1-2 and the butyl rubber outer shell layer 1-3 is thermosetting molding, and the number and spacing of weak fiber gratings in the weak fiber grating array 1-1 are determined by road surface monitoring requirements.
[0030] The upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b in the weak fiber grating array asphalt pavement sensor 1 are connected in series and connected to the weak fiber grating analyzer 2. The weak fiber grating analyzer 2 reads the wavelength of the weak fiber grating array 1-1 and is read into the asphalt pavement deformation evaluation module 3;
[0031] When the asphalt pavement is deformed, the asphalt pavement deformation evaluation module 3 evaluates the pavement deformation direction based on the wavelength difference between the upper and lower corresponding points of the upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b in the weak fiber grating array asphalt pavement sensor 1, and calculates the pavement deformation size based on the pre-calibrated wavelength value-displacement relationship;
[0032] The weak fiber grating array asphalt pavement sensor 1 needs to be buried in the asphalt pavement. In the working state, the upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b are distributed up and down in the thickness direction of the asphalt pavement; the weak fiber grating array asphalt pavement sensor 1 is buried in the asphalt pavement, and at the asphalt pouring temperature, the asphalt aggregate is embedded in the butyl rubber shell layer 1-3.
[0033] The number of weak fiber gratings in the weak fiber grating array asphalt pavement sensor 1 and the spacing between the upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b are determined according to the sensor monitoring requirements.
[0034] Attached Figure 1 The schematic diagram of the asphalt pavement monitoring system based on weak fiber grating array sensing of the present invention is as follows. The specific implementation method is that the weak fiber grating array asphalt pavement sensor 1 is arranged in the asphalt pavement, the weak fiber grating array asphalt pavement sensor 1 is connected to the weak fiber grating analyzer 2, the weak fiber grating analyzer 2 reads the wavelength value and transmits it to the asphalt pavement deformation evaluation module 3, during the asphalt pavement pouring process, the aggregate in the asphalt is embedded in the butyl rubber shell layer 1-3 in the weak fiber grating array asphalt pavement sensor 1 to form a bite, thereby ensuring that the sensor can deform in coordination with the pavement during service.
[0035] Figure 3 The schematic diagram of asphalt pavement deformation evaluation based on weak fiber grating array asphalt pavement sensor of the present invention is shown. In the figure, w11, w12..., w1n and w21, w22,..., w2n are respectively weak fiber grating measurement points in two weak fiber grating arrays 1-1 of weak fiber grating array asphalt pavement sensor 1 before deformation. w'11, w'12..., w'1n and w'21, w'22,..., w'2n are respectively weak fiber grating measurement points in two weak fiber grating arrays 1-1 of weak fiber grating array asphalt pavement sensor 1 after deformation. Figure 3 The middle working condition is a schematic diagram of roadbed sinking. The deformation of the lower part of the central axis of the weak fiber grating array asphalt pavement sensor is greater than that of the upper part, that is, in the deformation area, the wavelength increment of w'21 is greater than the wavelength increment of w'11, the wavelength increment of w'22 is greater than the wavelength increment of w'12, ..., the wavelength increment of w'2n is greater than the wavelength increment of w'1n. The roadbed deformation direction can be determined based on the wavelength increment values of the upper and lower corresponding positions of the upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b. Before the weak fiber grating array sensor is deployed, the relationship between the wavelength value and the displacement in the weak fiber grating array 1-1 is calibrated experimentally, and the corresponding road surface deformation value is calculated based on the calibrated wavelength value and displacement relationship and the measured wavelength value when the road surface is deformed.
[0036] In order to achieve monitoring reliability, the upper weak fiber grating array 1-1a at any local position in the weak fiber grating array asphalt pavement sensor 1 needs to be parallel to the lower weak fiber grating array 1-1b. Since the weak fiber grating array asphalt pavement sensor 1 is a long cable-shaped flexible structure, any local position is prone to bending and torsional deformation during the layout along the length of the road surface. Slight torsion, deformation, and bending at any part of the weak fiber grating array asphalt pavement sensor 1 will cause the upper and lower positional relationship of the upper weak fiber grating array 1-1a and the lower weak fiber grating array 1-1b to change at the local position of the weak fiber grating array asphalt pavement sensor 1. For this reason, the following structural optimization scheme and layout scheme are proposed;
[0037] The outer skin of the cable-shaped weak fiber grating array asphalt pavement sensor 1 is provided with a laying guide groove 18 along the length extension direction; when the cable-shaped weak fiber grating array asphalt pavement sensor 1 is laid, the laying guide groove 18 is parallel to the upper part of the weak fiber grating array 1-1a;
[0038] It also includes an advance counterweight laying belt 5, which is a belt-like structure with a certain thickness. The thickness of the advance counterweight laying belt 5 is not less than the outer diameter of the weak fiber grating array asphalt pavement sensor 1. A horizontal lying glue groove 6 with a semicircular cross-section is extended along the length direction on the upper side of the advance counterweight laying belt 5. The inner diameter of the horizontal lying glue groove 6 is consistent with the outer diameter of the weak fiber grating array asphalt pavement sensor 1.
[0039] The first counterweight laying belt 5 is composed of a butyl rubber outer layer 5.1 and a counterweight inner layer 5.2. The butyl rubber outer layer 5.1 is wrapped around the counterweight inner layer 5.2. The counterweight inner layer 5.2 is a flexible composite counterweight material with a rubber base material mixed with a counterweight aggregate 71.
[0040] like Figure 4 As shown, in the laying state, the cable-shaped weak fiber grating array asphalt pavement sensor 1 lies in the lying glue groove 6 along the length direction, the inner wall of the lying glue groove 6 and the outer wall of the cable-shaped weak fiber grating array asphalt pavement sensor 1 are glued by quick-drying glue, and the laying guide groove 18 of the cable-shaped weak fiber grating array asphalt pavement sensor 1 faces upward;
[0041] Specific layout process:
[0042] Installation: Figure 5 and 6As shown, it includes a sensor deployment vehicle that can move along the deployment direction, and the lower part of the frame 10 of the deployment vehicle is connected with a front rolling arm 11 and a rear rolling arm 9 extending obliquely forward; the ends of the front rolling arm 11 and the rear rolling arm 9 are respectively rotatably mounted with a leading rolling wheel 16 and a rear rolling wheel 12 through bearings; a glue injection device 13 is arranged between the leading rolling wheel 16 and the rear rolling wheel 12, and the built-in glue is epoxy resin quick-drying glue, and the glue injection head 14 of the glue injection device 13 faces downward; Figure 7 As shown, the outer ring of the leading rolling wheel 16 has a circle of a constraint groove 18 with a width consistent with the width of the leading counterweight layout belt 5, and the outer ring of the trailing rolling wheel 12 has a b rolling constraint groove 19 with a width consistent with the outer diameter of the weak fiber grating array asphalt pavement sensor 1, and an annular constraint convex ring 20 is coaxially provided in the middle section of the inner wall; when the cable-shaped weak fiber grating array asphalt pavement sensor 1 crosses the b rolling constraint groove 19 of the trailing rolling wheel 12, the annular constraint convex ring 20 at the crossing position is inserted into the layout guide groove 18 on the weak fiber grating array asphalt pavement sensor 1.
[0043] Deployment process:
[0044] Preparation: First, a certain thickness of asphalt is laid on the road surface to form a bottom asphalt paving layer 7; the advance counterweight laying belt 5 led obliquely downward from the paving vehicle crosses the front lower side of the advance rolling wheel 16 and then extends backward and is horizontally laid on the surface of the bottom asphalt paving layer 7; at the same time, the cable-shaped weak fiber grating array asphalt pavement sensor 1 led obliquely downward crosses the front lower side of the advance rolling wheel 16 and lies along the length direction in the lying glue groove 6 of the advance counterweight laying belt 5 horizontally laid on the bottom asphalt paving layer 7;
[0045] Laying process: The laying vehicle moves forward slowly, and the advance counterweight laying belt 5 led obliquely downward is gradually rolled forward by the advance rolling wheel 16 and laid on the surface of the bottom asphalt paving layer 7. The advance counterweight laying belt 5 with a density equivalent to that of the asphalt pavement is stably attached to the surface of the bottom asphalt paving layer 7 under the action of gravity; at the same time, the glue injection head 14 of the glue injection device 13 slowly drips quick-drying glue into the lying glue joint 6 of the advance counterweight laying belt 5 below; at the same time, as the laying vehicle moves forward slowly, the cable-shaped weak fiber grating array led obliquely downward The asphalt pavement sensor 1 is gradually rolled forward by the rear rolling wheel 12 into the lying glue groove 6 of the pre-laid pre-weighted laying belt 5, and is quickly bonded to the pre-laid pre-weighted laying belt 5 under the bonding of quick-drying glue; and in the process of the cable-shaped weak fiber grating array asphalt pavement sensor 1 led obliquely downward crossing the rear rolling wheel 12, the annular constraint convex ring 20 of the crossing part of the rear rolling wheel 12 is always in a state of being stuck in the laying guide groove 18 on the weak fiber grating array asphalt pavement sensor 1, so the oblique The cable-shaped weak fiber grating array asphalt pavement sensor 1 led downward is gradually rolled forward by the rear rolling wheel 12 in the lying glue groove 6 of the previously laid counterweight laying belt 5. After being rolled by the rear rolling wheel 12, the laying guide groove 18 of the cable-shaped weak fiber grating array asphalt pavement sensor 1 is automatically horizontally upward under the constraint of the annular constraint convex ring 20; when the paving vehicle drives forward to the end of the road, the paving process is completed; at this time, the cable-shaped weak fiber grating array asphalt pavement sensor 1 is lying and fixed along the length direction It is connected to the lying glue groove 6 of the advance counterweight laying belt 5, and the laying guide groove 18 of any position of the cable-shaped weak fiber grating array asphalt pavement sensor 1 is horizontally upward, so as to ensure that the upper weak fiber grating array 1-1a of any local position in the weak fiber grating array asphalt pavement sensor 1 needs to be parallel to the lower weak fiber grating array 1-1b directly above at the end of laying; at the same time, the weak fiber grating array asphalt pavement sensor 1 is quickly bonded to the advance counterweight laying belt 5 laid in advance under the bonding of quick-drying glue;
[0046] After the installation is completed, high-temperature asphalt is used to carefully pour, fill and compact the integrated structure composed of the installed cable-shaped weak fiber grating array asphalt pavement sensor 1 and the advance counterweight laying belt 5 to form a final asphalt pavement. During the filling process, the advance counterweight laying belt 5 with high density and high contact area with the underlying asphalt paving layer 7 has a strong constraint on the cable-shaped weak fiber grating array asphalt pavement sensor 1 that is adhered to it. At this time, the cable-shaped weak fiber grating array asphalt pavement sensor 1 is not prone to local twisting, deformation, bending and local deviation under the constraint of the advance counterweight laying belt 5 during the further asphalt filling process; thereby ensuring that the upper weak fiber grating array 1-1a at any local position in the buried weak fiber grating array asphalt pavement sensor 1 needs to be parallel to the lower weak fiber grating array 1-1b.
[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. An asphalt pavement monitoring system based on fiber grating array sensing, comprising a weak fiber grating array asphalt pavement sensor (1), the weak fiber grating array asphalt pavement sensor (1) being arranged in the asphalt pavement; The weak fiber grating array asphalt pavement sensor (1) is in the shape of a cable, and comprises a fluororubber inner core layer (1-2), and the fluororubber inner core layer (1-2) is coated with a butyl rubber outer shell layer (1-3); two weak fiber grating arrays (1-1) are placed in parallel in the fluororubber inner core layer (1-2); the two parallel weak fiber grating arrays (1-1) are respectively recorded as an upper weak fiber grating array (1-1a) and a lower weak fiber grating array (1-1b); in a working state, the upper weak fiber grating array (1-1a) and the lower weak fiber grating array (1-1b) are distributed up and down in the thickness direction of the asphalt pavement.
2. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 1 is characterized by: An upper weak fiber grating array (1-1a) and a lower weak fiber grating array (1-1b) in a weak fiber grating array asphalt pavement sensor (1) are connected in series and connected to a weak fiber grating analyzer (2). The weak fiber grating analyzer (2) reads the wavelength of the weak fiber grating array (1-1) and the wavelength is read into an asphalt pavement deformation evaluation module (3).
3. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 1 is characterized in that: When the road surface is deformed, the asphalt road surface deformation evaluation module (3) evaluates the road surface deformation direction and road surface deformation magnitude based on the wavelength difference between the upper and lower corresponding points of the upper weak fiber grating array (1-1a) and the lower weak fiber grating array (1-1b) in the weak fiber grating array asphalt road surface sensor (1).
4. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 1 is characterized by: The outer skin of the cable-shaped weak fiber grating array asphalt pavement sensor (1) is provided with a laying guide groove (18) along the length extension direction; when the cable-shaped weak fiber grating array asphalt pavement sensor (1) is in a laid state, the laying guide groove (18) is parallel to the upper part of the upper weak fiber grating array (1-1a).
5. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 4 is characterized by: It also includes a first counterweight arrangement belt (5), which is a belt-shaped structure with a certain thickness. A horizontal glue groove (6) with a semicircular cross-section is provided on the upper side of the first counterweight arrangement belt (5) along the length direction. The inner diameter of the horizontal glue groove (6) is the same as the outer diameter of the weak fiber grating array asphalt pavement sensor (1).
6. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 5 is characterized by: The advance counterweight placement belt (5) comprises a butyl rubber outer layer (5.1) and a counterweight inner layer (5.2), wherein the butyl rubber outer layer (5.1) is wrapped around the counterweight inner layer (5.2), and the counterweight inner layer (5.2) is a flexible composite counterweight material having a rubber base material mixed with counterweight aggregates (71).
7. The asphalt pavement monitoring system based on fiber grating array sensing according to claim 6 is characterized by: In the deployed state, the cable-shaped weak fiber grating array asphalt pavement sensor (1) lies in the lying glue groove (6) along the length direction, the inner wall of the lying glue groove (6) and the outer wall of the cable-shaped weak fiber grating array asphalt pavement sensor (1) are glued by quick-drying glue, and the deployment guide groove (18) of the cable-shaped weak fiber grating array asphalt pavement sensor (1) faces upward.
8. The sensor deployment system of the asphalt pavement monitoring system based on fiber grating array sensing according to claim 7 is characterized by: The invention comprises a sensor deployment vehicle capable of traveling in a deployment direction, wherein the lower part of the vehicle frame (10) of the deployment vehicle is connected with a front rolling arm (11) and a rear rolling arm (9) extending obliquely forward; the ends of the front rolling arm (11) and the rear rolling arm (9) are respectively rotatably mounted with a leading rolling wheel (16) and a rear rolling wheel (12) through bearings; a glue injection device (13) is arranged between the leading rolling wheel (16) and the rear rolling wheel (12), and the glue injection head (14) of the glue injection device (13) faces downward; as shown in FIG7 , the outer ring of the leading rolling wheel (16) has a circle with a width similar to that of the leading rolling wheel (16). The a constraint groove (18) of the same width as the heavy laying belt (5) is provided, the outer ring of the rear rolling wheel (12) has a b rolling constraint groove (19) of the same width as the outer diameter of the weak fiber grating array asphalt pavement sensor (1), and an annular constraint convex ring (20) is coaxially provided in the middle section of the inner wall; when the cable-shaped weak fiber grating array asphalt pavement sensor (1) crosses the b rolling constraint groove (19) of the rear rolling wheel (12), the annular constraint convex ring (20) at the crossing position is inserted into the laying guide groove (18) on the weak fiber grating array asphalt pavement sensor (1).
9. The sensor deployment system of the asphalt pavement monitoring system based on fiber grating array sensing according to claim 8, characterized in that: Preparation: First, a certain thickness of asphalt is laid on the road surface to form a bottom asphalt paving layer (7); the advance counterweight laying belt (5) led obliquely downward from the paving vehicle crosses the front lower side of the advance rolling wheel (16) and then extends backward and is horizontally laid on the surface of the bottom asphalt paving layer (7); at the same time, the cable-shaped weak fiber grating array asphalt pavement sensor (1) led obliquely downward crosses the front lower side of the advance rolling wheel (16) and then lies along the length direction in the lying glue groove (6) of the advance counterweight laying belt (5) horizontally laid on the bottom asphalt paving layer (7); Then the laying vehicle is controlled to move forward slowly, and at the same time, the glue injection head (14) of the glue injection device (13) slowly drips quick-drying glue into the lying glue joint groove (6) of the counterweight laying belt (5) below; After the installation is completed, asphalt is used to carefully fill and compact the integrated structure formed by the installed cable-shaped weak fiber grating array asphalt pavement sensor (1) and the advance counterweight installation belt (5).