Road information collection system and method based on self-sensing conductive asphalt pavement

Abstract

The present invention discloses a road information collection system and method based on a self-inductive conductive asphalt pavement, comprising: a first electrode sheet and a second electrode sheet are laid inside the self-inductive conductive asphalt pavement; the first electrode sheet and the second electrode sheet are simultaneously connected to an external resistance collection circuit; the resistance collection circuit is connected to a data processing unit, and the data processing unit is connected to a display screen; the display screen is used to display changes in resistance values. The present invention can monitor the resistance of the self-inductive conductive asphalt pavement through the first electrode sheet and the second electrode sheet, and transmit information about the passing of vehicles. The present invention enables the pavement structure to play the function of a sensor sensing and collecting pavement information. And this method effectively overcomes the problems of sensor durability and difficulty in replacement.

Description

Technical Field

[0001] The invention belongs to the technical field of materials and roads, and relates to a road information collection system and method based on self-inductive conductive asphalt pavement. Background Art

[0002] Economic development has led to a rapid increase in the number of cars and caused a series of traffic problems. Road intelligence helps solve a series of traffic problems such as road congestion, and road information collection plays an important role in road intelligence.

[0003] At present, the collection of road information is mostly carried out by burying sensors. For example, stress strain sensors, piezoelectric sensors, magnetic induction coils, etc. are more commonly used. The use of sensors can timely transmit vehicle and road status information, and its low price allows it to be buried in large quantities, which plays a significant role in the intelligence of roads. However, the sensor has the problem of poor durability and is prone to failure in the road structure. Based on the problems with current sensors, a method that can overcome the poor durability of sensors is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to provide a road information collection system and method based on self-inductive conductive asphalt pavement, which solves the problems of poor durability and difficulty in replacement of sensors.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A road information collection system based on self-sensing conductive asphalt pavement includes: a self-sensing conductive asphalt pavement, a resistance collection circuit, a data processing unit and a display screen;

[0007] The self-inductive conductive asphalt pavement includes a first electrode sheet and a second electrode sheet;

[0008] The first electrode sheet and the second electrode sheet are laid inside the self-inductive conductive asphalt pavement;

[0009] The first electrode sheet and the second electrode sheet are simultaneously externally connected to a resistance collection circuit;

[0010] The resistance acquisition circuit is connected to the data processing unit, and the data processing unit is connected to the display screen; the display screen is used to display the change of the resistance value.

[0011] A further improvement of the present invention is:

[0012] The resistance acquisition circuit includes a resistance testing circuit, a single chip microcomputer and a circuit board;

[0013] The first electrode sheet and the second electrode sheet are simultaneously connected to a resistance test circuit; the resistance test circuit is connected to a single chip microcomputer; the single chip microcomputer is connected to a data processing unit; the resistance test circuit and the single chip microcomputer are arranged on a circuit board;

[0014] The microcontroller is connected to ground and VCC at the same time.

[0015] The resistance test circuit includes: a resistor R0, a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a diode D;

[0016] One end of the resistor R1 is connected to VCC, one end of the resistor R0 and the P1.0 pin of the microcontroller;

[0017] The other end of the resistor R1 is connected to the cathode of the diode D; the anode of the diode D is grounded, and is also connected to the lead 1-B and the P1.3 pin of the microcontroller;

[0018] The other end of the resistor R0 is connected to one end of the resistor R2 and the P1.1 pin of the microcontroller, and the other end of the resistor R2 is connected to the lead 1-A and the P1.2 pin of the microcontroller;

[0019] One end of the resistor R3 is connected to the microcontroller and the capacitor C1, and the other end of the capacitor C1 is connected to VCC; the other end of the resistor R3 is grounded;

[0020] Leads 1-A and 1-B of the resistance test circuit are laid out on the circuit board.

[0021] The self-inductive conductive asphalt pavement also includes a first asphalt mixture, a conductive asphalt mixture and a second asphalt mixture;

[0022] The first asphalt mixture, the first electrode sheet, the conductive asphalt mixture, the second electrode sheet and the second asphalt mixture are arranged on the road in order from top to bottom.

[0023] Conductive asphalt mixture includes: aggregate, asphalt, mineral powder and conductive phase material;

[0024] The preparation method of the conductive asphalt mixture is as follows: aggregate, asphalt, mineral powder and conductive phase material are placed in a mixing pot in sequence, and each time a material is added, stirring is performed to obtain the conductive asphalt mixture;

[0025] The first asphalt mixture and the second asphalt mixture include: aggregate, asphalt, and mineral powder;

[0026] The preparation method of the first asphalt mixture is: placing aggregate, asphalt, and mineral powder in a mixing pot in order, stirring for 90 seconds each time a material is added, to obtain the first asphalt mixture;

[0027] The first asphalt mixture and the second asphalt mixture are prepared in the same manner;

[0028] Aggregates are mineral materials with a particle size greater than 0.075 mm; mineral powders are mineral materials with a particle size less than 0.075 mm; conductive phase materials include: graphite, carbon fiber, carbon nanotubes and steel fiber.

[0029] It also includes wire tubes; the wire tubes are buried on both sides of the road; the first electrode sheet and the second electrode sheet are connected to the resistance test circuit through the wire tubes.

[0030] It also includes a power supply area; the power supply area provides power to the resistance collection circuit and the real-time display screen; the power supply area includes a transformer, a first rectifier diode D1, a second rectifier diode D2 and a filter capacitor;

[0031] One end of the transformer is connected to 220V AC, and the upper and lower ends of the other end of the transformer are respectively connected to the positive electrode of the first rectifier diode D1 and the positive electrode of the second rectifier diode D2, the negative electrode of the first rectifier diode D1 is connected to the positive electrode of the filter capacitor C, and the negative electrode of the second rectifier diode D1 is connected to the negative electrode of the filter capacitor C; the negative electrode of the first rectifier diode D1 is connected to the negative electrode of the second rectifier diode D1, and the connecting wire between the negative electrode of the first rectifier diode D1 and the negative electrode of the second rectifier diode D1 is connected to the middle position of the other end of the transformer; the positive and negative electrodes of the filter capacitor C derive 30V DC.

[0032] The first electrode sheet and the second electrode sheet are laid inside the self-inductive conductive asphalt pavement, specifically:

[0033] The self-inductive conductive asphalt pavement is divided into an upper layer, a middle layer and a lower layer;

[0034] When the first electrode sheet and the second electrode sheet are located on the upper surface, the middle surface layer and the lower surface layer are both the second asphalt mixture;

[0035] When the first electrode sheet and the second electrode sheet are located at the middle layer, the upper layer is the first asphalt mixture and the lower layer is the second asphalt mixture;

[0036] When the first electrode sheet and the second electrode sheet are located on the lower surface layer, the upper surface layer and the middle surface layer are both the first asphalt mixture.

[0037] The road information collection method based on self-sensing conductive asphalt pavement includes:

[0038] Conductive asphalt mixture is prepared, and a first asphalt mixture, a first electrode sheet, a conductive asphalt mixture, a second electrode sheet, and a second asphalt mixture are laid in order from top to bottom to form a self-inductive conductive asphalt pavement; the first electrode sheet and the second electrode sheet are simultaneously connected to a resistance test circuit; the resistance test circuit is connected to a single-chip microcomputer; the single-chip microcomputer is connected to a data processing unit; the data processing unit is connected to a display screen; the display screen is used to display changes in resistance values;

[0039] When a vehicle is driving on the road and runs over the self-sensing conductive asphalt pavement, the first electrode plate and the second electrode plate are deformed, and the resistance change in the resistance testing circuit is measured in real time by the resistance testing circuit; the resistance value obtained by the resistance testing circuit will be transmitted to the data processing unit via the single-chip microcomputer, and finally the data processing unit will record the values ​​of the resistance value and pressure value changing with time, and draw them into a pressure-resistance curve and display them on the display screen.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention lays the first electrode sheet and the second electrode sheet on the self-inductive conductive asphalt pavement, and the first electrode sheet and the second electrode sheet are externally connected to a resistance acquisition circuit, the resistance acquisition circuit is connected to a data processing unit, and the data processing unit is connected to a display screen; when a vehicle passes through the self-inductive conductive asphalt pavement, the resistance test circuit measures the resistance change in real time and displays it on the display screen. The present invention can monitor the resistance of the self-inductive conductive asphalt pavement through the first electrode sheet and the second electrode sheet, and transmit the information of the vehicle passing by. The present invention enables the pavement structure to play the function of the sensor sensing and collecting pavement information. And this method effectively overcomes the problems of sensor durability and difficulty in replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 It is a cross-sectional view of the road structure;

[0044] Figure 2 Schematic diagram of the road information collection structure; (a) is a schematic diagram of the first electrode sheet and the second electrode sheet located on the upper layer, (b) is a schematic diagram of the first electrode sheet and the second electrode sheet located on the middle layer, and (c) is a schematic diagram of the first electrode sheet and the second electrode sheet located on the lower layer;

[0045] Figure 3 It is a schematic diagram of a galvanized electrode sheet;

[0046] Figure 4 It is a schematic diagram of the layout of the road information collection structure;

[0047] Figure 5 It is a schematic diagram of the resistance information collection equipment;

[0048] Figure 6 Collect the circuit diagram for the resistor;

[0049] Figure 7 It is a schematic diagram of the circuit board;

[0050] Figure 8 Provide circuit diagram for power supply;

[0051] Fig. 9 It is a curve diagram of the relationship between pressure and time;

[0052] Fig.10 It is a curve diagram of the relationship between resistance change value and time.

[0053] Among them, 1-self-sensing conductive asphalt pavement; 2-resistance information acquisition system; 3-first asphalt mixture; 4-conductive asphalt mixture; 5-second asphalt mixture; 6-resistance test circuit; 7-real-time display screen, 8-power supply area; 9-wire tube; 12-first electrode sheet; 13-second electrode sheet; 14-conducting wire; 15-single-chip computer; 16-circuit board, 17-upper layer, 18-middle layer, 19-lower layer. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0055] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0057] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0058] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0059] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0061] See also Figures 1 to 10 , the present invention discloses a road information collection system based on self-inductive conductive asphalt pavement, comprising: a self-inductive conductive asphalt pavement 1, a resistance collection circuit, a data processing unit and a display screen 7;

[0062] The self-inductive conductive asphalt pavement 1 comprises a first electrode sheet 12 and a second electrode sheet 13;

[0063] The first electrode sheet 12 and the second electrode sheet 13 are laid inside the self-inductive conductive asphalt pavement 1;

[0064] The first electrode sheet 12 and the second electrode sheet 13 are simultaneously connected to an external resistance collection circuit;

[0065] The resistance acquisition circuit is connected to the data processing unit, and the data processing unit is connected to the display screen 7; the display screen 7 is used to display the change of the resistance value.

[0066] The resistance acquisition circuit includes a resistance test circuit 6, a single chip computer 15 and a circuit board 16;

[0067] The first electrode sheet 12 and the second electrode sheet 13 are both externally connected to the resistance test circuit 6; the resistance test circuit 6 is connected to the single chip microcomputer 15; the single chip microcomputer 15 is connected to the data processing unit; the resistance test circuit 6 and the single chip microcomputer 15 are arranged on the circuit board 16; the single chip microcomputer 15 is connected to the ground and VCC at the same time.

[0068] The resistance test circuit 6 includes: a resistor R0, a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a diode D;

[0069] One end of the resistor R1 is respectively connected to VCC, one end of the resistor R0 and the P1.0 pin of the microcontroller;

[0070] The other end of the resistor R1 is connected to the cathode of the diode D; the anode of the diode D is grounded, and is also connected to the lead 1-B and the P1.3 pin of the microcontroller;

[0071] The other end of the resistor R0 is connected to one end of the resistor R2 and the P1.1 pin of the microcontroller, and the other end of the resistor R2 is connected to the lead 1-A and the P1.2 pin of the microcontroller;

[0072] One end of the resistor R3 is connected to the microcontroller and the capacitor C1, and the other end of the capacitor C1 is connected to VCC; the other end of the resistor R3 is grounded;

[0073] Leads 1-A and 1-B of the resistance test circuit 6 are arranged on the circuit board 16. The circuit board 16 is provided with multiple sets of the same resistance test circuits 6 and single-chip microcomputers 15. There are a plurality of self-inductive conductive asphalt pavements 1, and the leads 1-A and 1-B on the resistance test circuit 6 are connected to the first electrode sheet 12 and the second electrode sheet 13 respectively; each set of resistance test circuits 6 and single-chip microcomputers 15 corresponds to one self-inductive conductive asphalt pavement 1.

[0074] The self-inductive conductive asphalt pavement 1 also includes a first asphalt mixture 3, a conductive asphalt mixture 4 and a second asphalt mixture 5;

[0075] The first asphalt mixture 3, the first electrode sheet 12, the conductive asphalt mixture 4, the second electrode sheet 13 and the second asphalt mixture 5 are arranged on the road in order from top to bottom.

[0076] The conductive asphalt mixture 4 comprises: aggregate, asphalt, mineral powder and conductive phase material;

[0077] The preparation method of the conductive asphalt mixture 4 is as follows: aggregate, asphalt, mineral powder and conductive phase material are placed in a mixing pot in order, and each time a material is added, stirring is performed to obtain the conductive asphalt mixture 4;

[0078] The first asphalt mixture 3 and the second asphalt mixture 5 include: aggregate, asphalt, and mineral powder;

[0079] The preparation method of the first asphalt mixture 3 is as follows: aggregate, asphalt, and mineral powder are placed in a mixing pot in order, and each time a material is added, it is stirred for 90 seconds to obtain the first asphalt mixture 3;

[0080] The preparation methods of the first asphalt mixture 3 and the second asphalt mixture 5 are the same;

[0081] Aggregates are mineral materials with a particle size greater than 0.075 mm; mineral powders are mineral materials with a particle size less than 0.075 mm; conductive phase materials include: graphite, carbon fiber, carbon nanotubes and steel fiber.

[0082] The wire tubes 9 are buried on both sides of the road; the first electrode sheet 12 and the second electrode sheet 13 are connected to the resistance test circuit 6 through the wire tubes 9 .

[0083] The power supply area 8 provides power to the resistance acquisition circuit and the real-time display screen 7; the power supply area 8 includes a transformer, a first rectifier diode D1, a second rectifier diode D2 and a filter capacitor;

[0084] One end of the transformer is connected to 220V AC, and the upper and lower ends of the other end of the transformer are respectively connected to the positive electrode of the first rectifier diode D1 and the positive electrode of the second rectifier diode D2, the negative electrode of the first rectifier diode D1 is connected to the positive electrode of the filter capacitor C, and the negative electrode of the second rectifier diode D1 is connected to the negative electrode of the filter capacitor C; the negative electrode of the first rectifier diode D1 is connected to the negative electrode of the second rectifier diode D1, and the connecting wire between the negative electrode of the first rectifier diode D1 and the negative electrode of the second rectifier diode D1 is connected to the middle position of the other end of the transformer; the positive and negative electrodes of the filter capacitor C derive 30V DC.

[0085] The first electrode sheet 12 and the second electrode sheet 13 are laid inside the self-inductive conductive asphalt pavement 1, specifically:

[0086] The self-inductive conductive asphalt pavement 1 is divided into an upper layer 17, a middle layer 18 and a lower layer 19;

[0087] When the first electrode sheet 12 and the second electrode sheet 13 are located on the upper surface layer 17, the middle surface layer 18 and the lower surface layer 19 are both the second asphalt mixture 5;

[0088] When the first electrode sheet 12 and the second electrode sheet 13 are located at the middle layer 18, the upper layer 17 is the first asphalt mixture 3, and the lower layer 19 is the second asphalt mixture 5;

[0089] When the first electrode sheet 12 and the second electrode sheet 13 are located on the lower surface layer 19 , the upper surface layer 17 and the middle surface layer 18 are both the first asphalt mixture 3 .

[0090] The road information collection method based on self-sensing conductive asphalt pavement includes:

[0091] Prepare a conductive asphalt mixture 4, and lay the first asphalt mixture 3, the first electrode sheet 12, the conductive asphalt mixture 4, the second electrode sheet 13 and the second asphalt mixture 5 in order from top to bottom to form a self-inductive conductive asphalt pavement 1; the first electrode sheet 12 and the second electrode sheet 13 are simultaneously connected to an external resistance test circuit 6; the resistance test circuit 6 is connected to a single-chip microcomputer 15; the single-chip microcomputer 15 is connected to a data processing unit; the data processing unit is connected to a display screen 7; the display screen 7 is used to display changes in resistance values;

[0092] When a vehicle is driving on the road and rolling over the self-inductive conductive asphalt pavement 1, the first electrode plate 12 and the second electrode plate 13 are deformed, and the resistance change in the resistance test circuit 6 is measured in real time by the resistance test circuit 6; the resistance value obtained by the resistance test circuit 6 is transmitted to the data processing unit via the single chip computer 15, and finally the data processing unit records the values ​​of the resistance value and the pressure value changing with time, and plots them into a pressure-resistance curve and displays them on the display screen 7. The preparation process of the conductive asphalt mixture 4 is as follows: the aggregate, asphalt, mineral powder, and conductive phase material are placed in a mixing pot in order, and each time a material is added, it is stirred for 90 seconds to obtain a self-inductive conductive asphalt pavement.

[0093] There are three layout modes of the self-inductive conductive asphalt pavement 1:

[0094] When the upper layer 17 is used, when a vehicle is running on the road and runs over the laid road information collection structure, the road information collection structure will be deformed, thereby causing a sudden change in the internal resistance value of the road information collection structure. The change process of the resistance value will be measured in real time by the resistance test circuit 6, and the STC90C516RD+ microcontroller 15 will compare the measured resistance value with the previous resistance value. If the decrease is greater than 6%, it is considered that a vehicle has passed, and the obtained result will be stored. The result stored by the microcontroller 15 can be transmitted to the real-time display screen via a USB data cable for display;

[0095] The upper layer 17 can be made of AC-13 or SMA-13.

[0096] When the middle surface layer 18 is used for layout, when a vehicle is running on the road and rolling over the laid road information collection structure, the road information collection structure will be deformed, thereby causing a sudden change in the internal resistance value of the road information collection structure. The change process of the resistance value will be measured in real time by the resistance test circuit, and the STC90C516RD+ single-chip microcomputer 15 will compare the measured resistance value with the previous resistance value. If the reduction is greater than 8%, it is considered that a vehicle has passed, and the obtained result will be stored. The results stored by the single-chip microcomputer 15 can be transmitted to the real-time display screen via a USB data cable for display;

[0097] The middle surface layer 18 may be made of AC-16.

[0098] When the lower layer 19 is used, when a vehicle is running on the road and rolling over the road information collection structure, the road information collection structure will be deformed, thereby causing a sudden change in the internal resistance value of the road information collection structure. The change process of the resistance value will be measured in real time by the resistance test circuit 6, and the STC90C516RD+ microcontroller 15 will compare the measured resistance value with the previous resistance value. If the reduction is greater than 10%, it is considered that a vehicle has passed, and the obtained result will be stored. The result stored by the microcontroller 15 can be transmitted to the real-time display screen via a USB data cable for display.

[0099] The lower layer 19 may be made of AC-20.

[0100] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A road information collection method based on self-inductive conductive asphalt pavement, characterized in that: A road information collection system based on a self-inductive conductive asphalt pavement, the system comprising: a plurality of self-inductive conductive asphalt pavements (1), a resistance collection circuit, a data processing unit, a wire tube (9) and a display screen (7); The self-inductive conductive asphalt pavements (1) are arranged at intervals and symmetrically on both sides of the road, and each self-inductive conductive asphalt pavement (1) comprises a first electrode sheet (12) and a second electrode sheet (13); the first electrode sheet (12) and the second electrode sheet (13) are laid inside the self-inductive conductive asphalt pavement (1); the first electrode sheet (12) and the second electrode sheet (13) are simultaneously connected to an external resistance acquisition circuit; the resistance acquisition circuit is connected to a data processing unit, and the data processing unit is connected to a display screen (7); the display screen (7) is used to display changes in resistance values; the resistance acquisition circuit comprises a resistance test circuit; A circuit (6), a single-chip computer (15) and a circuit board (16); a first electrode sheet (12) and a second electrode sheet (13) are connected to a resistance test circuit (6), the resistance test circuit (6) is connected to a single-chip computer (15); the single-chip computer (15) is connected to a data processing unit; the resistance test circuit (6) and the single-chip computer (15) are arranged on the circuit board (16); the single-chip computer (15) is connected to ground and VCC at the same time; the wire tube (9) is buried on both sides of the road; the first electrode sheet (12) and the second electrode sheet (13) are connected to the resistance test circuit (6) through the wire tube (9); The self-sensing conductive asphalt pavement (1) further comprises a first asphalt mixture (3), a conductive asphalt mixture (4) and a second asphalt mixture (5); the first asphalt mixture (3), the first electrode sheet (12), the conductive asphalt mixture (4), the second electrode sheet (13) and the second asphalt mixture (5) are arranged on the road in a descending order; the conductive asphalt mixture (4) comprises: aggregate, asphalt, mineral powder and conductive phase material; the preparation method of the conductive asphalt mixture (4) comprises: placing the aggregate, asphalt, mineral powder and conductive phase material in a mixing pot in a certain order, stirring each time a material is added, and obtaining to a conductive asphalt mixture (4); the first asphalt mixture (3) and the second asphalt mixture (5) comprise: aggregate, asphalt, and mineral powder; the preparation method of the first asphalt mixture (3) is: placing the aggregate, asphalt, and mineral powder in a mixing pot in order, stirring for 90 seconds each time a material is added, to obtain the first asphalt mixture (3); the preparation method of the first asphalt mixture (3) and the second asphalt mixture (5) is the same; the aggregate is a mineral material with a particle size greater than 0.075 mm; the mineral powder is a mineral material with a particle size less than 0.075 mm; the conductive phase material comprises: graphite, carbon fiber, carbon nanotube and steel fiber; The first electrode sheet (12) and the second electrode sheet (13) are laid inside the self-inductive conductive asphalt pavement (1), specifically: the self-inductive conductive asphalt pavement (1) is divided into an upper layer (17), a middle layer (18) and a lower layer (19); when the first electrode sheet (12) and the second electrode sheet (13) are located on the upper layer (17), the middle layer (18) and the lower layer (19) are both the second asphalt mixture (5); when the first electrode sheet (12) and the second electrode sheet (13) are located on the middle layer (18), the upper layer (17) is the first asphalt mixture (3) and the lower layer (19) is the second asphalt mixture (5); when the first electrode sheet (12) and the second electrode sheet (13) are located on the lower layer (19), the upper layer (17) and the middle layer (18) are both the first asphalt mixture (3); The specific process is as follows: preparing a conductive asphalt mixture (4), and laying a first asphalt mixture (3), a first electrode sheet (12), a conductive asphalt mixture (4), a second electrode sheet (13) and a second asphalt mixture (5) in order from top to bottom to form a self-inductive conductive asphalt pavement (1); the first electrode sheet (12) and the second electrode sheet (13) are simultaneously connected to an external resistance test circuit (6); the resistance test circuit (6) is connected to a single chip computer (15); the single chip computer (15) is connected to a data processing unit; the data processing unit is connected to a display screen (7); the display screen (7) is used to display changes in resistance values; When a vehicle is traveling on a road and rolling over the self-inductive conductive asphalt pavement (1), the first electrode sheet (12) and the second electrode sheet (13) are deformed, and the resistance change in the resistance test circuit (6) is measured in real time by the resistance test circuit (6); the resistance value obtained by the resistance test circuit (6) is transmitted to a data processing unit via a single chip computer (15); and finally the data processing unit records the values ​​of the resistance value and the pressure value changing with time, and plots them into a pressure-resistance curve and displays them on a display screen (7); when the first electrode sheet (12) and the second electrode sheet (13) are located at an upper surface layer (17), a middle surface layer (18) or a lower surface layer (19), if the measured resistance value is reduced by more than 6%, 8% or 10% compared with the initial resistance value, respectively, it is considered that a vehicle has passed.

2. The road information collection method based on self-inductive conductive asphalt pavement according to claim 1 is characterized in that: The resistance testing circuit (6) comprises: a resistor R0, a resistor R1, a resistor R2, a resistor R3, a capacitor C1 and a diode D; One end of the resistor R1 is respectively connected to VCC, one end of the resistor R0 and the P1.0 pin of the microcontroller; The other end of the resistor R1 is connected to the cathode of the diode D; the anode of the diode D is grounded, and is also connected to the lead 1-B and the P1.3 pin of the microcontroller; The other end of the resistor R0 is connected to one end of the resistor R2 and the P1.1 pin of the microcontroller, and the other end of the resistor R2 is connected to the lead 1-A and the P1.2 pin of the microcontroller; One end of the resistor R3 is connected to the microcontroller and the capacitor C1, and the other end of the capacitor C1 is connected to VCC; the other end of the resistor R3 is grounded; Leads 1-A and 1-B of the resistance testing circuit (6) are arranged on a circuit board (16).

3. The road information collection method based on self-inductive conductive asphalt pavement according to claim 1 is characterized in that: It also includes a power supply area (8); the power supply area (8) provides power to the resistance collection circuit and the real-time display screen (7); the power supply area (8) includes a transformer, a first rectifier diode D1, a second rectifier diode D2 and a filter capacitor; One end of the transformer is connected to 220V AC power, and the upper and lower ends of the other end of the transformer are respectively connected to the positive electrode of the first rectifier diode D1 and the positive electrode of the second rectifier diode D2, the negative electrode of the first rectifier diode D1 is connected to the positive electrode of the filter capacitor C, and the negative electrode of the second rectifier diode D2 is connected to the negative electrode of the filter capacitor C; the negative electrode of the first rectifier diode D1 is connected to the negative electrode of the second rectifier diode D2, and the connecting wire between the negative electrode of the first rectifier diode D1 and the negative electrode of the second rectifier diode D2 is connected to the middle position of the other end of the transformer; the positive and negative electrodes of the filter capacitor C derive 30V DC power.

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