Accelerometer-implanted asphalt mixture forming mold and method

Abstract

The application relates to an asphalt mixture forming mold implanted with an acceleration sensor and a method. A lower mold comprises a bottom plate, a first front wing plate, a first rear wing plate, a first left wing plate and a first right wing plate which are connected with each other, the first front wing plate and the first rear wing plate are oppositely arranged at the front and rear ends of the bottom plate, and the first left wing plate and the first right wing plate are oppositely arranged at the left and right ends of the bottom plate; an upper mold comprises a second front wing plate, a second rear wing plate, a second left wing plate and a second right wing plate which are connected with each other, the second left wing plate and the second right wing plate are oppositely arranged along the left-right direction, and the second front wing plate and the second rear wing plate are oppositely arranged at the front and rear ends of the second left wing plate and the second right wing plate. By adopting the technical scheme, the combination of the acceleration sensor and the internal interface of the asphalt mixture is better, so that the signal acquisition accuracy of the acceleration sensor is high, the monitoring of the asphalt mixture test piece is more accurate, and the position of the acceleration sensor is not easy to deviate and has high position accuracy.

Description

Technical Field

[0001] This application relates to the field of asphalt mixture molding technology, and in particular to asphalt mixture molding molds and methods with embedded acceleration sensors. Background Technology

[0002] With the accelerating pace of smart pavement construction, an increasing number of intelligent sensing devices are being embedded within road structures. Accelerometers are widely used in road infrastructure. However, asphalt pavements face harsh environments during construction, such as compaction and high-temperature paving. During their service life, they are subjected to repeated vehicle loads and adverse environmental factors, posing numerous challenges to the deployment and maintenance of accelerometers.

[0003] In research and teaching institutions, it is often necessary to prepare asphalt mixture specimens in the laboratory for experimental research on asphalt mixture road structures. For experimental research on asphalt mixture road structures with embedded accelerometers, accelerometers also need to be embedded during the laboratory preparation of asphalt mixture specimens. The implantation of the accelerometer must ensure both the accuracy of its placement and the accuracy of its signal acquisition.

[0004] Currently, when preparing asphalt mixture specimens in the laboratory, there are two main methods for embedding accelerometers inside the specimens: post-excavation and pre-support methods. However, both methods have significant drawbacks. The post-excavation method involves creating a groove in the formed asphalt mixture, embedding the accelerometer, and then backfilling the mixture. This method not only damages the existing asphalt mixture but also results in differences in mechanical properties between the original and backfilled asphalt mixture, and the operation is quite complex. The pre-support method involves placing a support at the accelerometer's installation location and mounting the accelerometer on the support before the asphalt mixture is formed. While this method is simple, the support is a foreign object to the asphalt mixture, significantly affecting the accelerometer's signal acquisition, and the collected data cannot accurately reflect the health status of the surrounding asphalt mixture. Summary of the Invention

[0005] Therefore, it is necessary to address the aforementioned technical problems existing in the existing methods for embedding acceleration sensors inside asphalt mixture specimens during laboratory preparation, and to provide an asphalt mixture molding die and method for embedding acceleration sensors.

[0006] An asphalt mixture molding die with an embedded accelerometer sensor, the asphalt mixture molding die with the embedded accelerometer sensor comprising: a lower die and an upper die;

[0007] The lower mold includes: a base plate, a first front wing plate, a first rear wing plate, a first left wing plate, and a first right wing plate that are connected to each other. The first front wing plate and the first rear wing plate are disposed opposite each other at the front and rear ends of the base plate, and the first left wing plate and the first right wing plate are disposed opposite each other at the left and right ends of the base plate, such that the base plate, the first front wing plate, the first rear wing plate, the first left wing plate, and the first right wing plate form an upward-opening lower receiving space.

[0008] The upper mold includes: a second front wing plate, a second rear wing plate, a second left wing plate, and a second right wing plate connected to each other. The second left wing plate and the second right wing plate are arranged opposite each other in the left-right direction. The second front wing plate and the second rear wing plate are arranged opposite each other at the front and rear ends of the second left wing plate and the second right wing plate, so that the second front wing plate, the second rear wing plate, the second left wing plate, and the second right wing plate form an upper accommodating space that runs vertically through the upper part. The second rear wing plate is provided with a wire passage groove, which runs through the second rear wing plate in the front-back direction and extends to the lower end of the second rear wing plate. The wire passage groove is used for the cable of the acceleration sensor to pass through.

[0009] In one embodiment, the asphalt mixture molding die with the implanted acceleration sensor further includes a first left screw and a first right screw; a first front wing plate, a first rear wing plate, and a bottom plate, the left ends of which extend beyond the first left wing plate to the left, and the right ends of which extend beyond the first right wing plate to the right; the first left screw is located to the left of the first left wing plate, and its front and rear ends are respectively connected to the first front wing plate and the first rear wing plate; the first right screw is located to the right of the first right wing plate, and its front and rear ends are respectively connected to the first front wing plate and the first rear wing plate.

[0010] In one embodiment, the first front wing plate is provided with a positioning groove that corresponds to the front end of the first left wing plate, and the first rear wing plate is provided with a positioning groove that corresponds to the rear end of the first left wing plate; the first front wing plate is provided with a positioning groove that corresponds to the front end of the first right wing plate, and the first rear wing plate is provided with a positioning groove that corresponds to the rear end of the first right wing plate.

[0011] In one embodiment, the asphalt mixture molding die with the implanted acceleration sensor further includes a first left connecting rod and a first right connecting rod; the first left screw has a first left connecting hole, and the base plate has a second left connecting hole aligned with the first left connecting hole; the first left connecting hole and the second left connecting hole are used for the first left connecting rod to be detachably inserted to detachably connect the first left screw to the base plate; the first right screw has a first right connecting hole, and the base plate has a second right connecting hole aligned with the first right connecting hole; the first right connecting hole and the second right connecting hole are used for the first right connecting rod to be detachably inserted to detachably connect the first right screw to the base plate.

[0012] In one embodiment, the asphalt mixture molding die with the implanted acceleration sensor further includes a second left screw and a second right screw; a second front wing plate and a second rear wing plate, the left ends of which extend beyond the second left wing plate to the left, and the right ends of which extend beyond the second right wing plate to the right; the second left screw is located to the left of the second left wing plate, and the front and rear ends of the second left screw are respectively connected to the second front wing plate and the second rear wing plate; the second right screw is located to the right of the second right wing plate, and the front and rear ends of the second right screw are respectively connected to the second front wing plate and the second rear wing plate.

[0013] In one embodiment, the second front wing plate is provided with a positioning groove that corresponds to and engages with the front end of the second left wing plate, and the second rear wing plate is provided with a positioning groove that corresponds to and engages with the rear end of the second left wing plate; the second front wing plate is provided with a positioning groove that corresponds to and engages with the front end of the second right wing plate, and the second rear wing plate is provided with a positioning groove that corresponds to and engages with the rear end of the second right wing plate.

[0014] In one embodiment, the asphalt mixture molding die with the implanted acceleration sensor further includes a second left connecting rod and a second right connecting rod; the second left screw is provided with a third left connecting hole, the third left connecting hole, the first left connecting hole and the second left connecting hole are aligned and used to allow the second left connecting rod to be detachably inserted, so as to detachably connect the second left screw, the first left screw and the base plate; the second right screw is provided with a third right connecting hole, the third right connecting hole, the first right connecting hole and the second right connecting hole are aligned and used to allow the second right connecting rod to be detachably inserted, so as to detachably connect the second right screw, the first right screw and the base plate.

[0015] In one embodiment, the second front wing plate is provided with two front positioning line holes spaced apart in the left-right direction, and the second rear wing plate is provided with two rear positioning line holes corresponding to the two front positioning line holes. Nylon positioning lines are passed through the corresponding front and rear positioning line holes. The second left wing plate is provided with two left positioning line holes spaced apart in the front-back direction, and the second right wing plate is provided with two right positioning line holes corresponding to the two left positioning line holes. Nylon positioning lines are passed through the corresponding left and right positioning line holes.

[0016] The nylon positioning lines passing through the two front positioning line holes, the two rear positioning line holes, the two left positioning line holes, and the two right positioning line holes intersect to define a positioning square hole at the intersection position, which is used to position the accelerometer.

[0017] A method for forming asphalt mixture with an embedded accelerometer sensor, implemented using the asphalt mixture forming mold with an embedded accelerometer sensor described in any of the above-mentioned embodiments, includes the following steps:

[0018] S100: Based on the Marshall stability, the compaction density ρ and the volume V of the lower containment space.下 Calculate the mass m of asphalt mixture required for the lower mold. 下 =1.03ρV 下 Based on the Marshall stability, the compaction density ρ, and the volume V of the upper containment space. 上 and the volume V of the accelerometer 加 Calculate the mass m of asphalt mixture required for the upper mold. 上 =1.03ρ(V) 上 -V 加 ), where 1.03 is the loss coefficient, and m is taken as 下 Asphalt mixture and m 上 The asphalt mixture is then placed in an oven to maintain the set temperature.

[0019] S200: Place m in the lower containment space 下 Asphalt mixture is compacted using a roller mill.

[0020] S300: In step S200, the m in the lower accommodating space 下 After the asphalt mixture is compacted, in the lower containment space m 下 A tack coat is applied to the upper surface of the asphalt mixture, and then an acceleration sensor is placed on the upper surface of the asphalt mixture in the lower containment space.

[0021] S400: The upper mold is set above the lower mold and fixedly connected to the lower mold. The cable of the acceleration sensor enters the cable groove from the lower end of the cable groove and extends outward.

[0022] S500: In m 上 A small amount of asphalt mixture is taken from the asphalt mixture and filled around the accelerometer sensor, then tamped down. Then m... 上 The remaining asphalt mixture in the asphalt mixture is placed into the upper containment space, and then the asphalt mixture in the upper containment space is compacted by a roller mill.

[0023] S600: Cool the asphalt mixture in the upper and lower molds at room temperature and demold.

[0024] In one embodiment, the method for forming asphalt mixture with an implanted accelerometer further includes: after step S400 and before step S500, threading and tensioning nylon positioning lines through corresponding left and right positioning line holes, and threading and tensioning nylon positioning lines through corresponding front and rear positioning line holes, so that the nylon positioning lines intersect to define a positioning square hole at the intersection position, and the accelerometer is located in the positioning square hole.

[0025] In one embodiment, the asphalt mixture molding method with an implanted acceleration sensor further includes: before step S200, inserting a first left connecting rod through a first left connecting hole and a second left connecting hole to detachably connect the first left screw to the base plate; and inserting a first right connecting rod through a first right connecting hole and a second right connecting hole to detachably connect the first right screw to the base plate.

[0026] Step S400 includes: S410: removing the first left connecting rod from the first left connecting hole and the second left connecting hole, and removing the first right connecting rod from the first right connecting hole and the second right connecting hole; S420: setting the upper mold above the lower mold, passing the second left connecting rod through the third left connecting hole, the first left connecting hole, and the second left connecting hole, and passing the second right connecting rod through the third right connecting hole, the first right connecting hole, and the second right connecting hole, so as to fix the upper mold and the lower mold together.

[0027] The asphalt mixture specimens obtained using the aforementioned asphalt mixture molding die and method with embedded accelerometer sensors can be used in experimental studies of actual asphalt mixture road structures. The portion of the asphalt mixture specimen molded in the lower die 1 can be used to simulate the middle layer of the actual asphalt mixture road structure, hereinafter referred to as the middle layer simulation portion; the portion molded in the upper die 1 can be used to simulate the upper layer of the actual asphalt mixture road structure, hereinafter referred to as the upper layer simulation portion. Because the accelerometer 3 is embedded inside the upper layer simulation portion above the middle layer simulation portion during the molding process, the bonding between the accelerometer and the internal interface of the asphalt mixture is better, resulting in higher signal acquisition accuracy of the accelerometer, more precise monitoring of the asphalt mixture specimen, and lower positional accuracy of the accelerometer.

[0028] Moreover, since the accelerometer is implanted inside the upper layer simulation part above the middle layer simulation part during the formation of the upper layer simulation part and the middle layer simulation part, there are no problems caused by the destruction of existing asphalt material and backfill asphalt material in the post-excavation method, nor are there problems caused by foreign objects affecting the acquisition of accelerometer signals in the pre-support method. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an asphalt mixture molding die with an embedded acceleration sensor, according to one embodiment.

[0030] Figure 2 for Figure 1 Exploded view of the upper and lower molds of the asphalt mixture molding die with an embedded acceleration sensor.

[0031] Figure 3This is a schematic diagram of the structure of a roller mill according to one embodiment.

[0032] Figure 4 This is a flowchart of an embodiment of an asphalt mixture molding method with an implanted accelerometer.

[0033] Figures 5 to 7 This is a schematic diagram of the asphalt mixture forming process with an implanted accelerometer sensor, according to one embodiment.

[0034] Explanation of reference numerals: 1. Lower mold; 1-1. First left wing plate; 1-2. First right wing plate; 1-3. First front wing plate; 1-4. First rear wing plate; 1-5. Base plate; 1-6. First left screw; 1-7. First right screw; 2. Upper mold; 2-1. Second left wing plate; 2-2. Second right wing plate; 2-3. Second front wing plate; 2-4. Second rear wing plate; 2-5. Second left screw; 2-7. Second right screw ; 2-6, Second left connecting rod; 2-8, Second right connecting rod; 2-9, Front positioning line hole; 2-10, Rear positioning line hole; 2-11, First positioning line frame; 2-12, Second positioning line frame; 2-13, Through groove; 3, Acceleration sensor; 3-1, Cable; 4, Roller mill; 4-1, Crossbeam; 4-2, Rotating mechanism; 4-3, Lifting mechanism; 4-4, Support arm; 4-5, Roller; 4-6, Support platform. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] Please refer to Figure 1 and Figure 2 One embodiment of this application provides an asphalt mixture molding die with an embedded acceleration sensor (hereinafter referred to as an asphalt mixture molding die), which includes a lower die 1 and an upper die 2.

[0042] The lower mold 1 includes: a base plate 1-5, a first front wing plate 1-3, a first rear wing plate 1-4, a first left wing plate 1-1, and a first right wing plate 1-2 connected to each other. The first front wing plate 1-3 and the first rear wing plate 1-4 are arranged opposite each other at the front and rear ends of the base plate 1-5, and the first left wing plate 1-1 and the first right wing plate 1-2 are arranged opposite each other at the left and right ends of the base plate 1-5, such that the base plate 1-5, the first front wing plate 1-3, the first rear wing plate 1-4, the first left wing plate 1-1, and the first right wing plate 1-2 form an upward-opening lower receiving space.

[0043] The upper mold 2 includes: a second front wing plate 2-3, a second rear wing plate 2-4, a second left wing plate 2-1, and a second right wing plate 2-2 connected to each other. The second left wing plate 2-1 and the second right wing plate 2-2 are arranged opposite each other in the left-right direction. The second front wing plate 2-3 and the second rear wing plate 2-4 are arranged opposite each other at the front and rear ends of the second left wing plate 2-1 and the second right wing plate 2-2, so that the second front wing plate 2-3, the second rear wing plate 2-4, the second left wing plate 2-1, and the second right wing plate 2-2 form a vertically continuous upper accommodating space. The second rear wing plate 2-4 is provided with a wire passage groove 2-13. The wire passage groove 2-13 passes through the second rear wing plate 2-4 in the front-back direction and extends from top to bottom to the lower end of the second rear wing plate 2-4. The wire passage groove 2-13 is used for the cable 3-1 of the acceleration sensor 3 to pass through.

[0044] Please refer to Figure 3 This application provides an embodiment of a roller mill 4, which includes: a crossbeam 4-1, a rotating mechanism 4-2, a lifting mechanism 4-3, support arms 4-4, a roller 4-5, and a support platform 4-6. The support platform 4-6 supports the asphalt mixture forming mold. Two support arms 4-4 are spaced apart, with the lower ends of the support arms 4-4 fixed to the support platform 4-6 and the upper ends of the two support arms 4-4 fixed to both ends of the crossbeam 4-1. The lifting mechanism 4-3 is installed on the crossbeam 4-1, the rotating mechanism 4-2 is installed on the lifting mechanism 4-3, and the roller 4-5 is installed on the rotating mechanism 4-2. When the lifting mechanism 4-3 lifts and lowers, it can drive the rotating mechanism 4-2 and the roller 4-5 to lift and lower synchronously to adjust the height of the roller 4-5. The rotating mechanism 4-2 can drive the roller 4-5 to rotate for compaction. The axial direction of the roller 4-5 corresponds to the front-to-back direction, that is, the width direction of the asphalt mixture specimen and the width direction of the asphalt mixture forming mold.

[0045] For a more detailed description of the structure and working principle of the roller mill 4, please refer to the existing technology, which will not be elaborated here.

[0046] In one embodiment, the roller mill 4 is a SYD-0703-3 type pneumatic forming machine.

[0047] Combination Figures 4 to 7This application provides an embodiment of an asphalt mixture molding method with an implanted accelerometer (hereinafter referred to as the asphalt mixture molding method), which is implemented using the asphalt mixture molding mold described above. The asphalt mixture molding method includes the following steps:

[0048] S100: Based on the Marshall stability, the compaction density ρ and the volume V of the lower containment space. 下 Calculate the mass m of asphalt mixture required for mold 1. 下 =1.03ρV 下 Based on the Marshall stability, the compaction density ρ, and the volume V of the upper containment space. 上 and the volume V of the accelerometer sensor 3 加 Calculate the mass m of asphalt mixture required for mold 2. 上 =1.03ρ(V) 上 -V 加 ), where 1.03 is the loss coefficient; take m 下 Asphalt mixture and m 上 The asphalt mixture is placed in an oven to maintain the set temperature. By m 下 Asphalt mixture and m 上 Asphalt mixtures are placed in an oven to heat and maintain their temperature, preventing them from drying out. 下 Asphalt mixture and m 上 The asphalt mixture cools and solidifies at room temperature. The set temperature is, for example, 150 degrees Celsius.

[0049] The Marshall stability compaction density ρ is obtained by conducting a Marshall test on asphalt mixtures. The method for obtaining the Marshall stability compaction density ρ through the Marshall test can refer to existing technologies, and will not be elaborated further.

[0050] S200: Place m in the lower containment space 下 The asphalt mixture is compacted by roller mill 4.

[0051] For details, please refer to [link / reference]. Figure 5 Place the lower mold 1 on the support platform 4-6 of the roller mill 4, and insert m into the lower receiving space. 下 Asphalt mixture is contained in the space of the roller mill.

[0052] Because m 下 =1.03ρV 下 Considering a loss coefficient of 1.03, the mill 4 is used to process the m in the lower containment space. 下 After the asphalt mixture is compacted, m 下 The asphalt mixture is flat and compacted, filling the lower containment space. The m in the lower containment space... 下The volume of the asphalt mixture is approximately equal to the volume V of the lower containment space. 下 Thus, the space containing m 下 The density of asphalt mixtures generally meets the requirements of Marshall stability compaction density ρ.

[0053] Specifically, the mill 4 is used to process the m in the lower accommodating space. 下 After the asphalt mixture is compacted, the m in the lower containment space 下 The density of the asphalt mixture can reach (100±1)% of the Marshall stability compaction density ρ, with a lower containment space of m 下 The specific density of asphalt mixtures can be verified through experimental testing.

[0054] In step S200, when the asphalt mixture is placed into the lower receiving space, the asphalt mixture in the middle of the lower receiving space is made higher than the asphalt mixture around the perimeter. In this way, during compaction, the asphalt mixture spreads out from the middle to the perimeter, making it less likely to fall outside the lower mold 1 and facilitating better compaction.

[0055] S300: In step S200, the m in the lower accommodating space 下 After the asphalt mixture is compacted, in the lower containment space m 下 A tack coat is applied to the upper surface of the asphalt mixture, and then the lower containment space is filled with m... 下 An acceleration sensor 3 is placed on the upper surface of the asphalt mixture.

[0056] For details, please refer to the following: Figure 6 For the lower containment space m 下 After the asphalt mixture is compacted, m 下 The asphalt mixture fills the lower space smoothly and compactly, m 下 The upper surface of the asphalt mixture is flat. After applying the tack coat, the accelerometer 3 is placed on the upper surface of the asphalt mixture in the lower containment space. The accelerometer 3 is located above the lower containment space and does not occupy the lower containment space.

[0057] Furthermore, in this step, since the acceleration sensor 3 is placed on the already compacted m 下 The upper surface of the asphalt mixture, which has already been compacted (m) 下 The asphalt mixture can provide support for the accelerometer 3, eliminating the need for other support components (e.g., the support in the front support method is not required), thus fully ensuring the vertical position accuracy of the accelerometer 3.

[0058] S400: The upper mold 2 is set above the lower mold 1 and fixedly connected to the lower mold 1. The cable 3-1 of the acceleration sensor 3 enters the cable groove 2-13 from the lower end of the cable groove 2-13 and extends outward.

[0059] As described above, the accelerometer 3 is located above the lower receiving space. (Reference) Figure 7 When the upper mold 2 is placed above the lower mold 1, the acceleration sensor 3 occupies a portion of the upper accommodating space. Therefore, the volume of asphalt mixture that can be placed in the upper accommodating space is (V 上 -V 加 Thus, in step S100, the required mass m of asphalt mixture for the upper mold 2 is determined. 上 =1.03ρ(V) 上 -V 加 ).

[0060] In step S400, the upper mold 2 is placed on top of the lower mold 1 from top to bottom. Since the cable tray 2-13 passes through the second rear wing plate 2-4 in the front-rear direction and extends from top to bottom to the lower end of the second rear wing plate 2-4, when the upper mold 2 is placed downward, the cable 3-1 of the acceleration sensor 3 can enter the cable tray 2-13 from bottom to top from the lower end of the second rear wing plate 2-4. Furthermore, when entering the cable tray 2-13, the end of the cable 3-1 away from the acceleration sensor 3 extends backward out of the upper mold 2, thereby ensuring that the end of the cable 3-1 away from the acceleration sensor 3 can be properly connected to the device to be connected (i.e., the device used to receive the signal from the acceleration sensor 3, such as a computer).

[0061] S500: In m 上 A small amount of asphalt mixture was taken from the asphalt mixture and filled around the accelerometer 3, then tamped down. Then m... 上 The remaining asphalt mixture in the asphalt mixture is placed into the upper containment space, and then the asphalt mixture in the upper containment space is compacted by the roller mill 4.

[0062] In step S400, after the upper mold 2 and the lower mold 1 are fixedly connected, asphalt mixture can be placed in the upward-facing space. In step S500, at m 上 A small amount of asphalt mixture is taken from the asphalt mixture and filled around the accelerometer 3, then tamped down to ensure the small amount of asphalt mixture around the accelerometer 3 is compacted, thereby stabilizing the position of the accelerometer 3. This small amount of asphalt mixture is, for example, m... 上 1 / 20 to 1 / 10 of the asphalt mixture. Then add m 上 The remaining asphalt mixture (i.e., excluding the small amount of asphalt mixture already filled around the accelerometer 3) is poured into the upper containment space. After pouring, i.e., m... 上 The asphalt mixture has been completely placed into the upper containment space.

[0063] Since a small amount of compacted asphalt mixture has been pre-filled around the accelerometer 3, the position of the accelerometer 3 can be stabilized. Therefore, when the remaining asphalt mixture is poured out, the position of the accelerometer 3 can be prevented from shifting.

[0064] Because m 上 =1.03ρ(V) 上 -V 加 Considering a loss factor of 1.03, the mill 4 is used to process the m in the upper accommodating space. 上 After the asphalt mixture is compacted, the upper containment space contains m 上 The volume of asphalt mixture is approximately equal to V. 下 -V 加 Thus, the space containing m 上 The density of asphalt mixtures generally meets the requirements of Marshall stability compaction density ρ.

[0065] Specifically, the mill 4 is used to process the m in the upper accommodating space. 上 After the asphalt mixture is compacted, the upper containment space contains m 上 The density of asphalt mixtures can reach (100±1)% of the Marshall stability compaction density ρ, and the upper containment space m 上 The specific density of asphalt mixtures can be verified through experimental testing.

[0066] In step S500, m 上 When the remaining asphalt mixture in the asphalt mixture is placed into the upper receiving space, the asphalt mixture in the middle of the upper receiving space is made higher than the asphalt mixture around the perimeter. In this way, during compaction, the asphalt mixture spreads out from the middle to the perimeter, making it less likely to fall outside the upper mold 1 and facilitating better compaction.

[0067] In step S500, m 上 When the remaining asphalt mixture in the asphalt mixture is placed into the upper containment space, it should be tamped during the placement process, especially at the corners of the upper containment space, to ensure compaction.

[0068] It is worth noting that in step S300, m in the lower accommodating space 下 After the asphalt mixture is compacted, in the lower containment space m 下 A tack coat is applied to the upper surface of the asphalt mixture. Thus, in step S500, m... 上 When the asphalt mixture is placed into the upper containment space, the tack coat can enhance the m 上 Asphalt mixture and m 下 The bonding between asphalt mixtures makes m 上 Asphalt mixture and m 下The asphalt mixture exhibits better bonding. Preferably, the tack coat is made of emulsified asphalt, such as PC-3 emulsified asphalt.

[0069] S600: Cool the asphalt mixture in the upper mold 2 and lower mold 1 at room temperature and demold.

[0070] After the upper mold 2 and the lower mold 1 and the asphalt mixture inside them are placed at room temperature for a period of time (preferably 12 hours), the asphalt mixture inside the upper mold 2 and the lower mold 1 gradually cools down and solidifies, and can then be demolded to obtain the formed asphalt mixture specimen.

[0071] The asphalt mixture specimens obtained using the aforementioned asphalt mixture molding die and method with embedded accelerometer sensors can be used in experimental studies of actual asphalt mixture road structures. The portion of the asphalt mixture specimen molded in the lower die 1 can be used to simulate the middle layer of the actual asphalt mixture road structure, hereinafter referred to as the middle layer simulation portion; the portion molded in the upper die 1 can be used to simulate the upper layer of the actual asphalt mixture road structure, hereinafter referred to as the upper layer simulation portion. Because the accelerometer 3 is embedded inside the upper layer simulation portion above the middle layer simulation portion during the molding process, the bonding between the accelerometer and the internal interface of the asphalt mixture is better, resulting in higher signal acquisition accuracy of the accelerometer, more precise monitoring of the asphalt mixture specimen, and lower positional accuracy of the accelerometer.

[0072] Moreover, since the accelerometer is implanted inside the upper layer simulation part above the middle layer simulation part during the formation of the upper layer simulation part and the middle layer simulation part, there are no problems caused by the destruction of existing asphalt material and backfill asphalt material in the post-excavation method, nor are there problems caused by foreign objects affecting the acquisition of accelerometer signals in the pre-support method.

[0073] When the asphalt mixture specimens obtained by the above-mentioned asphalt mixture molding mold and method with implanted acceleration sensor are made of asphalt mixtures with different gradations in the upper layer simulation part and the middle layer simulation part, AC13 and AC16 mixtures can be used respectively.

[0074] In one embodiment, the asphalt mixture molding method further includes, after step S400 and before step S500, inserting the upper mold 2, the lower mold 1, and the connecting structure of the asphalt mixture filled in the lower mold 1 into an oven for heating to reach the aforementioned set temperature. That is, the upper mold 2, the lower mold 1, and the connecting structure of the asphalt mixture filled in the lower mold 1 are heated first, and then the process of placing m in step S500 is performed. 上The operation of the asphalt mixture ensures that the connection structure has sufficient temperature and m. 上 Asphalt mixtures achieve good adhesion.

[0075] refer to Figure 1 and Figure 2 In one embodiment, the asphalt mixture forming mold further includes a first left screw 1-6 and a first right screw 1-7. A first front wing plate 1-3, a first rear wing plate 1-4, and a bottom plate 1-5 have their left ends extending to the left beyond the first left wing plate 1-1, and their right ends extending to the right beyond the first right wing plate 1-2. Thus, the portion of the left ends of these three components extending beyond the first left wing plate 1-1, together with the first left wing plate 1-1, defines a first left space, and the portion of the right ends of these three components extending beyond the first right wing plate 1-2, together with the first right wing plate 1-2, defines a first right space.

[0076] The first left screw 1-6 is located to the left of the first left wing plate 1-1 (i.e., in the first left space), and its front and rear ends are connected to the first front wing plate 1-3 and the first rear wing plate 1-4, respectively, thereby fixing the left ends of the first front wing plate 1-3 and the first rear wing plate 1-4. The first left screw 1-6 can be threadedly connected to the first front wing plate 1-3, and the first left screw 1-6 can be threadedly connected to the first rear wing plate 1-4.

[0077] The first right screw 1-7 is located to the right of the first right wing plate 1-2 (i.e., in the first right space), and its front and rear ends are connected to the first front wing plate 1-3 and the first rear wing plate 1-4, respectively, thereby fixing the right ends of the first front wing plate 1-3 and the first rear wing plate 1-4. The first right screw 1-7 can be threadedly connected to both the first front wing plate 1-3 and the first rear wing plate 1-4.

[0078] The first left screw 1-6 and the first right screw 1-7 facilitate the quick connection and disassembly of the first front wing plate 1-3 and the first rear wing plate 1-41-2.

[0079] In one embodiment, the first front wing plate 1-3 is provided with a positioning groove corresponding to the front end of the first left wing plate 1-1, the first rear wing plate 1-4 is provided with a positioning groove corresponding to the rear end of the first left wing plate 1-1, the first front wing plate 1-3 is provided with a positioning groove corresponding to the front end of the first right wing plate 1-2, and the first rear wing plate 1-4 is provided with a positioning groove corresponding to the rear end of the first right wing plate 1-2. Therefore, by engaging the front and rear ends of the first left wing plate 1-1 with their respective positioning grooves, engaging the front and rear ends of the first right wing plate 1-2 with their respective positioning grooves, and then fixing the first front wing plate 1-3 and the first rear wing plate 1-4, the first left wing plate 1-1 and the first right wing plate 1-2 can be positioned between the first front wing plate 1-3 and the first rear wing plate 1-4.

[0080] In one embodiment, the asphalt mixture molding die further includes a first left connecting rod (not shown) and a first right connecting rod (not shown). The first left screw 1-6 has a first left connecting hole, and the base plate 1-5 has a second left connecting hole aligned with the first left connecting hole. The first and second left connecting holes allow the first left connecting rod to be detachably inserted, thereby detachably connecting the first left screw 1-6 to the base plate 1-5. The first left connecting rod allows for quick connection and disassembly of the first left screw 1-6 to the base plate 1-5, facilitating the rapid connection and disassembly of the left end of the base plate 1-5, the left end of the first front flange 1-3, and the left end of the first rear flange 1-4. The first left connecting rod and the second left connecting hole can be threaded together. The first left connecting hole can be a smooth hole or a threaded hole, and the first left connecting rod and the first left connecting hole can be a plug-in fit or a threaded fit.

[0081] The first right screw 1-7 has a first right connecting hole, and the base plate 1-5 has a second right connecting hole aligned with the first right connecting hole. The first and second right connecting holes allow the first right connecting rod to be detachably inserted, enabling a detachable connection between the first right screw 1-7 and the base plate 1-5. The first right connecting rod allows for quick connection and disassembly of the right ends of the first front wing plate 1-3, the first rear wing plate 1-4, and the base plate 1-5, facilitating the rapid connection and disassembly of the base plate 1-5, the first left wing plate 1-1, and the first right wing plate 1-2. The first right connecting rod and the second right connecting hole can be threaded together. The first right connecting hole can be a smooth hole or a threaded hole, and the first right connecting rod and the first right connecting hole can be either inserted or threaded.

[0082] In one embodiment, the asphalt mixture molding method further includes: before step S200, inserting a first left connecting rod through a first left connecting hole and a second left connecting hole to detachably connect the first left screw 1-6 to the base plate 1-5. Inserting a first right connecting rod through a first right connecting hole and a second right connecting hole to detachably connect the first right screw 1-7 to the base plate 1-5. In this way, the base plate 1-5, the first front flange 1-3, and the first rear flange 1-4 can be quickly connected, thereby completing the assembly of the lower mold 1.

[0083] More specifically, the first left wing plate 1-1 and the first right wing plate 1-2 are positioned between the first front wing plate 1-3 and the first rear wing plate 1-4. The first front wing plate 1-3 and the first rear wing plate 1-4 are fixed by the first left screw 1-6 and the first right screw 1-7. Then, the base plate 1-5 is connected to the first left screw 1-6 and the first right screw 1-7 by the first left connecting rod and the first right connecting rod, so that the components of the lower mold 1 can be quickly assembled.

[0084] refer to Figure 1 and Figure 2 In one embodiment, the asphalt mixture forming mold further includes a second left screw 2-5 and a second right screw 2-7. The second front flange 2-3 and the second rear flange 2-4 extend their left ends beyond the second left flange 2-1, and their right ends extend right beyond the second right flange 2-2. Thus, the portion of their left ends extending beyond the second left flange 2-1, together with the second left flange 2-1, defines a second left space, and the portion of their right ends extending beyond the second right flange 2-2, together with the second right flange 2-2, defines a second right space.

[0085] The second left screw 2-5 is located to the left of the second left wing plate 2-1 (i.e., in the second left space), and its front and rear ends are respectively connected to the second front wing plate 2-3 and the second rear wing plate 2-4, thereby fixing the left ends of the second front wing plate 2-3 and the second rear wing plate 2-4. The second left screw 2-5 can be threadedly connected to the second front wing plate 2-3, and the second left screw 2-5 can be threadedly connected to the second rear wing plate 2-4.

[0086] The second right screw 2-7 is located to the right of the second right wing plate 2-2 (i.e., in the second right space), and its front and rear ends are respectively connected to the second front wing plate 2-3 and the second rear wing plate 2-4, thereby fixing the right ends of the second front wing plate 2-3 and the second rear wing plate 2-4. The second right screw 2-7 can be threadedly connected to the second front wing plate 2-3, and the second right screw 2-7 can be threadedly connected to the second rear wing plate 2-4.

[0087] The second left screw 2-5 and the second right screw 2-7 facilitate the quick connection and disassembly of the second front wing plate 2-3 and the second rear wing plate 2-4.

[0088] In one embodiment, the second front wing plate 2-3 is provided with a positioning groove corresponding to the front end of the second left wing plate 2-1, and the second rear wing plate 2-4 is provided with a positioning groove corresponding to the rear end of the second left wing plate 2-1. The second front wing plate 2-3 is provided with a positioning groove corresponding to the front end of the second right wing plate 2-2, and the second rear wing plate 2-4 is provided with a positioning groove corresponding to the rear end of the second right wing plate 2-2. Therefore, by engaging the front and rear ends of the second left wing plate 2-1 with their respective positioning grooves, and engaging the front and rear ends of the second right wing plate 2-2 with their respective positioning grooves, and then fixing the second front wing plate 2-3 and the second rear wing plate 2-4, the second left wing plate 2-1 and the second right wing plate 2-2 can be positioned between the second front wing plate 2-3 and the second rear wing plate 2-4.

[0089] In one embodiment, the asphalt mixture molding die further includes a second left connecting rod 2-6 and a second right connecting rod 2-8. The second left screw 2-5 has a third left connecting hole, which, along with the first and second left connecting holes, is aligned to allow the second left connecting rod 2-6 to be detachably inserted, thereby detachably connecting the second left screw 2-5, the first left screw 1-6, and the base plate 1-5. The second right screw 2-7 has a third right connecting hole, which, along with the first and second right connecting holes, is aligned to allow the second right connecting rod 2-8 to be detachably inserted, thereby detachably connecting the second right screw 2-7, the first right screw 1-7, and the base plate 1-5.

[0090] Step S400 includes:

[0091] S410: Remove the first left connecting rod from the first left connecting hole and the second left connecting hole, and remove the first right connecting rod from the first right connecting hole and the second right connecting hole to free up the first left connecting hole, the second left connecting hole, the first right connecting hole, and the second right connecting hole.

[0092] S420: The upper mold 2 is placed above the lower mold 1, and the second left connecting rod 2-6 is inserted through the third left connecting hole, the first left connecting hole, and the second left connecting hole. The second right connecting rod 2-8 is inserted through the third right connecting hole, the first right connecting hole, and the second right connecting hole to fix the upper mold 2 and the lower mold 1.

[0093] In this embodiment, the upper mold 2 is the connection structure of the second front wing plate 2-3, the second rear wing plate 2-4, the second left wing plate 2-1, the second right wing plate 2-2, the second left screw 2-5, and the second right screw 2-7. Since the third left connecting hole, the first left connecting hole, and the second left connecting hole are aligned, the second left connecting rod 2-6 is passed through these holes to detachably connect the second left screw 2-5, the first left screw 1-6, and the base plate 1-5, thereby fixing the left end of the upper mold 2 to the lower mold 1. Similarly, the second right connecting rod 2-8 is passed through the third right connecting hole, the first right connecting hole, and the second right connecting hole to detachably fix the second right screw 2-7, the first right screw 1-7, and the base plate 1-5, thereby fixing the right end of the upper mold 2 to the lower mold 1. Through the technical solution of this embodiment, the upper mold 2 and the lower mold 1 can be quickly fixedly connected.

[0094] The second left connecting rod 2-6 can be a screw. The second left connecting rod 2-6 and the second left connecting hole can be threaded. The third left connecting hole and the first left connecting hole can be either smooth holes or threaded holes. The second left connecting rod 2-6 and the third left connecting hole can be either plug-in or threaded, and the second left connecting rod 2-6 and the first left connecting hole can also be either plug-in or threaded. The second right connecting rod 2-8 can be a screw. The second right connecting rod 2-8 and the second right connecting hole can be threaded. The third right connecting hole and the first right connecting hole can be either smooth holes or threaded holes. The second right connecting rod 2-8 and the third right connecting hole can both be either plug-in or threaded, and the second right connecting rod 2-8 and the first right connecting hole can also be either plug-in or threaded.

[0095] In one embodiment, the lower opening of the upper receiving space is adapted in shape and size to the upper opening of the lower receiving space. When the upper mold 2 is fixed above the lower mold 1, the lower opening of the upper receiving space is aligned with the upper opening of the lower receiving space. That is, the first front wing plate 1-3 is aligned with the second front wing plate 2-3, the first rear wing plate 1-4 is aligned with the second rear wing plate 2-4, the first left wing plate 1-1 is aligned with the second left wing plate 2-1, and the second right wing plate 2-2 is aligned with the first right wing plate 1-2.

[0096] Please combine Figure 1 and Figure 2In one embodiment, the second front wing plate 2-3 has two front positioning line holes 2-9 spaced apart in the left-right direction, and the second rear wing plate 2-4 has two rear positioning line holes 2-10 corresponding to the two front positioning line holes 2-9. Nylon positioning lines pass through the corresponding front positioning line holes 2-9 and rear positioning line holes 2-10. The second left wing plate 2-1 has two left positioning line holes spaced apart in the front-rear direction, and the second right wing plate 2-2 has two right positioning line holes corresponding to the two left positioning line holes. Nylon positioning lines pass through the corresponding left and right positioning line holes. The nylon positioning lines passing through the two front positioning line holes 2-9, the two rear positioning line holes 2-10, the two left positioning line holes, and the two right positioning line holes intersect, thus defining a positioning square hole at the intersection position. The positioning square hole is used to position the acceleration sensor 3.

[0097] The asphalt mixture forming method further includes, after step S400 and before step S500, threading and tensioning nylon positioning lines through the corresponding left positioning line hole and right positioning line hole, and threading and tensioning nylon positioning lines through the corresponding front positioning line hole 2-9 and rear positioning line hole 2-10, so that the nylon positioning lines intersect to define a positioning square hole at the intersection position, and the acceleration sensor 3 is located in the positioning square hole.

[0098] Thus, the nylon positioning lines forming the positioning square holes can position the accelerometer 3 in both the front-back and left-right directions, thereby ensuring the positional accuracy of the accelerometer 3. Since both the front-back and left-right directions are horizontal, the horizontal positional accuracy of the accelerometer 3 is guaranteed. Furthermore, because nylon positioning lines are used for positioning, (compared to the bracket in the front-mounted bracket method) the interference of the nylon positioning lines on the accelerometer is minimal, and it almost has no impact on the signal acquisition of the accelerometer.

[0099] In one embodiment, such as Figure 2 and Figure 7 As shown, a nylon positioning line passes sequentially through two corresponding front positioning line holes 2-9 and two rear positioning line holes 2-10, then is tensioned and fixed, thus forming a rectangular first positioning frame 2-11. Another nylon positioning line passes sequentially through two corresponding left positioning line holes and two right positioning line holes, then is tensioned and fixed, thus forming a rectangular second positioning frame 2-12. The first positioning frame 2-11 and the second positioning frame 2-12 intersect inside the upper mold 2, defining a positioning square hole. The position of the positioning square hole corresponds to the position of the accelerometer 3, thereby positioning the accelerometer 3 and ensuring its positional accuracy.

[0100] In one embodiment, in step S600, after the asphalt mixture in the upper mold 2 and the lower mold 1 has cooled at room temperature, the nylon positioning lines of the first positioning frame 2-11 and the second positioning frame 2-12 can be cut to facilitate demolding.

[0101] In one embodiment, the asphalt mixture forming method further includes, after step S100 and before step S200, setting the rolling process of the roller mill 4: setting the rolling direction, the temperature of the roller 4-5, and the rolling load. Specifically, the temperature of the roller 4-5 is preheated to approximately 100 degrees Celsius. The lower mold 1 is placed on the support platform 4-6, and the height of the roller 4-5 is adjusted by the lifting mechanism 4-3. The rolling load is adjusted to 9 kN. The rolling direction is set as follows: rolling 4 times in the front-to-back direction and rolling 8 times in the left-to-right direction.

[0102] In one embodiment, the length of the asphalt mixture forming mold is along the left-right direction, and the width is along the front-back direction.

[0103] In one embodiment, the accelerometer is a square accelerometer, 40 mm long and wide, and 30 mm high, implanted at the center of the asphalt mixture specimen. The lower receiving space has a height of 35 mm, a length of 100 mm, and a width of 40 mm, while the upper receiving space has a height of 65 mm, a length of 100 mm, and a width of 40 mm. The resulting asphalt mixture specimen has dimensions of 400 × 100 × 100 mm.

[0104] In one embodiment, the diameter of the nylon positioning line is 0.5 mm.

[0105] In one embodiment, cable 3-1 is a high-temperature resistant and interference-resistant signal cable.

[0106] The accelerometer sensor can be implanted at any location, not limited to the center of the asphalt mixture specimen. Multiple accelerometer sensors can be implanted, and their locations can be customized. The size of the accelerometer sensor is also not limited to the dimensions mentioned above.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A molding die for asphalt mixture with an embedded acceleration sensor, characterized in that, The asphalt mixture molding die with an implanted acceleration sensor includes: a lower die and an upper die; The lower mold includes: a base plate, a first front wing plate, a first rear wing plate, a first left wing plate, and a first right wing plate that are connected to each other. The first front wing plate and the first rear wing plate are disposed opposite each other at the front and rear ends of the base plate, and the first left wing plate and the first right wing plate are disposed opposite each other at the left and right ends of the base plate, such that the base plate, the first front wing plate, the first rear wing plate, the first left wing plate, and the first right wing plate form an upward-opening lower receiving space. The upper mold includes: a second front wing plate, a second rear wing plate, a second left wing plate, and a second right wing plate connected to each other. The second left wing plate and the second right wing plate are arranged opposite each other in the left-right direction. The second front wing plate and the second rear wing plate are arranged opposite each other at the front and rear ends of the second left wing plate and the second right wing plate, so that the second front wing plate, the second rear wing plate, the second left wing plate, and the second right wing plate form an upper accommodating space that runs vertically through the upper part. The second rear wing plate is provided with a wire passage groove that runs through the second rear wing plate in the front-back direction and extends to the lower end of the second rear wing plate. The wire passage groove is used for the cable of the acceleration sensor to pass through. The second front wing plate has two front positioning line holes spaced apart in the left-right direction, and the second rear wing plate has two rear positioning line holes corresponding to the two front positioning line holes. Nylon positioning lines are passed through the corresponding front and rear positioning line holes. The second left wing plate has two left positioning line holes spaced apart in the front-back direction, and the second right wing plate has two right positioning line holes corresponding to the two left positioning line holes. Nylon positioning lines are passed through the corresponding left and right positioning line holes. The nylon positioning lines passing through the two front positioning line holes, the two rear positioning line holes, the two left positioning line holes, and the two right positioning line holes intersect to define a positioning square hole at the intersection position, which is used to position the accelerometer.

2. The asphalt mixture molding die with an embedded acceleration sensor according to claim 1, characterized in that, It also includes a first left screw and a first right screw; a first front wing plate, a first rear wing plate, and a bottom plate, the left ends of which extend beyond the first left wing plate to the left, and the right ends of which extend beyond the first right wing plate to the right; the first left screw is located to the left of the first left wing plate, and the front and rear ends of the first left screw are respectively connected to the first front wing plate and the first rear wing plate; the first right screw is located to the right of the first right wing plate, and the front and rear ends of the first right screw are respectively connected to the first front wing plate and the first rear wing plate.

3. The asphalt mixture molding die with an embedded acceleration sensor according to claim 2, characterized in that, It also includes a first left connecting rod and a first right connecting rod; the first left screw is provided with a first left connecting hole, and the base plate is provided with a second left connecting hole aligned with the first left connecting hole; the first left connecting hole and the second left connecting hole are used for the first left connecting rod to be detachably inserted to detachably connect the first left screw to the base plate; the first right screw is provided with a first right connecting hole, and the base plate is provided with a second right connecting hole aligned with the first right connecting hole; the first right connecting hole and the second right connecting hole are used for the first right connecting rod to be detachably inserted to detachably connect the first right screw to the base plate.

4. The asphalt mixture molding die with an embedded acceleration sensor according to claim 3, characterized in that, It also includes a second left screw and a second right screw; a second front wing plate and a second rear wing plate, the left ends of which extend to the left beyond the second left wing plate, and the right ends of which extend to the right beyond the second right wing plate; the second left screw is located to the left of the second left wing plate, and the front and rear ends of the second left screw are respectively connected to the second front wing plate and the second rear wing plate; the second right screw is located to the right of the second right wing plate, and the front and rear ends of the second right screw are respectively connected to the second front wing plate and the second rear wing plate.

5. The asphalt mixture molding die with an embedded acceleration sensor according to claim 4, characterized in that, It also includes a second left connecting rod and a second right connecting rod; the second left screw is provided with a third left connecting hole, the third left connecting hole, the first left connecting hole and the second left connecting hole are aligned and used to allow the second left connecting rod to be detachably inserted, so as to detachably connect the second left screw, the first left screw and the base plate; the second right screw is provided with a third right connecting hole, the third right connecting hole, the first right connecting hole and the second right connecting hole are aligned and used to allow the second right connecting rod to be detachably inserted, so as to detachably connect the second right screw, the first right screw and the base plate.

6. The asphalt mixture molding die with an embedded acceleration sensor according to claim 1, characterized in that, The first front wing plate has a positioning groove that corresponds to the front end of the first left wing plate, and the first rear wing plate has a positioning groove that corresponds to the rear end of the first left wing plate; the first front wing plate has a positioning groove that corresponds to the front end of the first right wing plate, and the first rear wing plate has a positioning groove that corresponds to the rear end of the first right wing plate; and / or, the second front wing plate has a positioning groove that corresponds to the front end of the second left wing plate, and the second rear wing plate has a positioning groove that corresponds to the rear end of the second left wing plate; the second front wing plate has a positioning groove that corresponds to the front end of the second right wing plate, and the second rear wing plate has a positioning groove that corresponds to the rear end of the second right wing plate.

7. A method for forming asphalt mixture with an embedded accelerometer, characterized in that, The asphalt mixture molding method with an embedded acceleration sensor, as described in any one of claims 1 to 6, comprises the following steps: S100: Based on the Marshall stability, the compaction density ρ and the volume V of the lower containment space. 下 Calculate the mass m of asphalt mixture required for the lower mold. 下 =1.03ρV 下 Based on the Marshall stability, the compaction density ρ, and the volume V of the upper containment space. 上 and the volume V of the accelerometer 加 Calculate the mass m of asphalt mixture required for the upper mold. 上 =1.03ρ(V) 上- V 加 ), where 1.03 is the loss coefficient, and m is taken as 下 Asphalt mixture and m 上 The asphalt mixture is then placed in an oven to maintain the set temperature. S200: Place m in the lower containment space 下 Asphalt mixture is compacted using a roller mill. S300: In step S200, the m in the lower accommodating space 下 After the asphalt mixture is compacted, in the lower containment space m 下 A tack coat is applied to the upper surface of the asphalt mixture, and then an acceleration sensor is placed on the upper surface of the asphalt mixture in the lower containment space. S400: The upper mold is set above the lower mold and fixedly connected to the lower mold. The cable of the acceleration sensor enters the cable groove from the lower end of the cable groove and extends outward. S500: In m 上 A small amount of asphalt mixture is taken from the asphalt mixture and filled around the accelerometer sensor, then tamped down. Then m... 上 The remaining asphalt mixture in the asphalt mixture is placed into the upper containment space, and then the asphalt mixture in the upper containment space is compacted by a roller mill. S600: Cool the asphalt mixture in the upper and lower molds at room temperature and demold; It also includes: after step S400 and before step S500, threading and tensioning nylon positioning lines through the corresponding left and right positioning line holes, and threading and tensioning nylon positioning lines through the corresponding front and rear positioning line holes, so that the nylon positioning lines intersect to define a positioning square hole at the intersection position, and the acceleration sensor is located in the positioning square hole.

8. The method for forming asphalt mixture with an implanted accelerometer according to claim 7, characterized in that, Also includes: Before step S200, the first left connecting rod is passed through the first left connecting hole and the second left connecting hole to detachably connect the first left screw to the base plate; The first right connecting rod is inserted into the first right connecting hole and the second right connecting hole to detachably connect the first right screw to the base plate; Step S400 includes: S410: removing the first left connecting rod from the first left connecting hole and the second left connecting hole, and removing the first right connecting rod from the first right connecting hole and the second right connecting hole; S420: The upper mold is placed above the lower mold, and the second left connecting rod is passed through the third left connecting hole, the first left connecting hole, and the second left connecting hole. The second right connecting rod is passed through the third right connecting hole, the first right connecting hole, and the second right connecting hole to fix the upper mold and the lower mold together.

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