Indoor accelerated degradation and in-situ monitoring device for asphalt material in plateau extreme environment

Abstract

The invention discloses an indoor accelerated degradation and in-situ monitoring device for an asphalt material in a plateau extreme environment. The device comprises a closed box body, a PLC (Programmable Logic Controller) system control center arranged on the outer side wall of the box body, and a series of components subjected to weather-proof strengthening and precise control, namely a temperature control component and a sunlight simulation component which are arranged at the top in the box body, a pressure intensity control component arranged on the inner side wall of the box body, and an oxygen control component arranged on the inner side wall of the box body, the performance in-situ monitoring assembly and the degradation acceleration assembly are arranged on the inner side wall of the box body; an asphalt test piece sample table is arranged at the box bottom; and the PLC is in electric signal communication with each component, and dynamic linkage is realized. The method aims at comprehensively simulating the environmental conditions of coupling of multiple atrocious weather factors, is not limited by time, seasons and territory spaces, is short in test period, and can obtain samples of the asphalt pavement material in the plateau extreme environment and performance evolution rules of the asphalt pavement material in a more efficient and low-cost manner.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pavement material detection, and particularly to an indoor accelerated deterioration and in-situ monitoring device for asphalt materials in plateau extreme environments. Background Art

[0002] In plateau extreme environments such as Tibet, due to climate characteristics such as long-term low temperature, strong ultraviolet radiation, low oxygen content, and low air pressure, the performance of asphalt pavement materials is extremely prone to deterioration during service under the influence of complex and harsh road area climates coupled with multiple factors. Specifically, it is manifested as: rapid attenuation of properties such as low-temperature ductility, fatigue resistance, and adhesion of asphalt, which in turn leads to pavement diseases such as cracks, looseness, spalling, and potholes on the road surface. This will seriously reduce the safety of road operation and hinder the all-weather smoothness of regional strategic channels.

[0003] To reveal the mechanism of asphalt material performance deterioration in plateau extreme environments, develop high-performance asphalt materials suitable for this region, improve the service life and durability of asphalt pavements, and ensure people's livelihood and economic and social development, researchers usually obtain deteriorated asphalt samples through two methods: field natural deterioration tests and indoor equivalent simulation device tests, and test and evaluate the deterioration behavior of asphalt samples by heating and melting the mixed samples indoors. However, traditional field natural deterioration tests have deficiencies such as uncontrollable environmental factors during the research process, being affected by time, season, and geographical location, high test costs, and easy loss of field test samples; existing indoor equivalent simulation devices have a single simulation factor (such as high temperature, ultraviolet radiation, etc.), and cannot simulate the real environmental conditions of complex and harsh road areas coupled with multiple factors in plateau extreme environments, nor can they obtain the in-situ deterioration performance results of asphalt pavement materials in harsh environments. Eventually, it is difficult to accurately reveal the mechanism of asphalt performance deterioration in plateau extreme environments and effectively develop long-life and durable road-use asphalt materials. In addition, affected by the factors and conditions of extreme environments, the performance degradation rate of the systems and components of indoor simulation devices is fast, the stability is weak, and the (simulation) environmental adaptability is insufficient, ultimately resulting in unreliable simulation environments and easy failures of the devices.

[0004] The utility model patent with the publication number of CN212780422U discloses a simulation experiment device during the asphalt aging process. The device includes a temperature-controlled aging chamber and an aging simulation device arranged therein. The temperature-controlled aging chamber is provided with an upper chamber and a lower chamber. The lower chamber is also respectively provided with a power chamber and water storage chambers located on the left and right sides of the power chamber. A sample tray made of transparent material is horizontally rotatably connected in the upper chamber. The sample tray is provided with a sample to be tested. A fiber optic sensor is horizontally arranged above the interior of the sample to be tested. On the outer walls of the left and right sides of the sample to be tested, a right fixing plate and a left fixing plate with an "L" shape are respectively fixed. A rolling mechanism is arranged between the two right fixing plates and the left fixing plates. The aging simulation device includes a sunlight device, a temperature control device, and a spraying device. The sunlight device and the spraying device of the present utility model can be alternately used through the cooperation of a lifting rod and a connecting rod; although it can be used to simulate the damage situation of asphalt pavement under the combined action of ultraviolet radiation, large day-night temperature difference, and load in high-altitude and alpine regions, it cannot provide relatively accurate data for the changes in the deterioration performance (hardness, glossiness, etc.) data of asphalt pavement materials under extreme plateau environments and the deterioration rate of indoor accelerated deterioration and monitoring devices. Summary of the Invention

[0005] The main purpose of the present invention is to provide an indoor accelerated deterioration and in-situ monitoring device for asphalt materials in extreme plateau environments, aiming to solve the technical problem that the existing simulation experiment device cannot provide relatively accurate data for the changes in asphalt pavement materials under extreme plateau environments.

[0006] To achieve the above purpose, the present invention provides an indoor accelerated deterioration and in-situ monitoring device for asphalt materials in extreme plateau environments. The device includes a closed box body, a PLC system control center, a temperature control component and a sunlight simulation component arranged at the top inside the closed box body, and a pressure control component, an oxygen control component, a performance in-situ monitoring component, and a deterioration acceleration component arranged on the inner side wall of the closed box body;

[0007] A placement structure for placing test specimens of asphalt pavement materials is further arranged at the bottom inside the closed box body;

[0008] The PLC system control center is located on the outer side wall of the closed box body, and the PLC system control center is also electrically connected to the temperature control component, the sunlight simulation component, the pressure control component, the oxygen control component, the performance in-situ monitoring component, and the deterioration acceleration component;

[0009] The temperature control component is used to simulate the temperature of extreme plateau environments inside the closed box body;

[0010] The sunlight simulation component is used to simulate sunlight with different intensities in extreme plateau environments inside the closed box body;

[0011] The pressure control component is used to simulate the air pressure in the extreme plateau environment within the closed box;

[0012] The oxygen control component is used to simulate the oxygen content in the extreme plateau environment within the closed box;

[0013] The PLC system control center implements multi-parameter collaborative control. Combining the MPC global optimization algorithm, decoupling PID control algorithm, and feed-forward compensation algorithm, it realizes the dynamic decoupling and collaborative regulation of multi-environment parameters. Taking the correlation function between ultraviolet light and temperature and the correlation function between air pressure and oxygen concentration as the core models, it combines mechanism analysis and experimental calibration to ensure the precise control of the complex coupling system;

[0014] The performance in-situ monitoring component is used to detect the hardness and gloss of the test specimens of asphalt pavement materials within the closed box;

[0015] The deterioration acceleration component is also electrically connected to the temperature control component, sunlight simulation component, pressure control component, and oxygen control component respectively. The deterioration acceleration component is used to regulate the temperature parameters within the temperature control component and / or the simulated sunlight parameters within the sunlight simulation component and / or the air pressure parameters within the pressure control component and / or the oxygen content within the oxygen control component to accelerate the natural deterioration process of the test specimens of asphalt pavement materials within the closed box.

[0016] Optionally, the temperature control component includes a wide-temperature range temperature sensor, multiple heating tubes, a thermal insulation structure, a temperature protection device, a liquid level protection device, and a refrigerator;

[0017] The wide-temperature range temperature sensor and multiple heating tubes are located within the closed box;

[0018] The temperature protection device, liquid level protection device, and refrigerator are located outside the closed box, and the thermal insulation structure is arranged on the outer wall of the closed box;

[0019] The refrigerator, temperature protection device, and liquid level protection device are connected in parallel with each other, and the refrigerator is connected in series with a temperature converter;

[0020] The heating tubes, temperature protection device, and liquid level protection device are also electrically connected to the PLC system control center.

[0021] Optionally, the temperature control component further includes a chemical heater, and the chemical heater is arranged within the closed box and is connected in parallel with multiple heating tubes.

[0022] Optionally, the sunlight simulation component includes multiple lamps, reflectors, light propagators, lenses, filters, light uniform irradiators, built-in light intensity feedbackers, safety protection devices, light intensity regulators, wide-temperature range fiber optic sensors, calibration systems, and angular space control structures;

[0023] Multiple lamps are all used to emit ultraviolet light;

[0024] Multiple lamps, reflectors, wide-temperature fiber optic sensors and angular space control structures are arranged in a closed box. The angular space control structure is connected to multiple lamps to adjust the irradiation angles of the lamps;

[0025] The light propagators, lenses, filters, light uniform irradiators, built-in light intensity feedback devices, safety protection devices, light intensity regulators and calibration systems are arranged outside the closed box. The light intensity regulator is electrically connected to the lenses and multiple lamps;

[0026] The safety protection device and the wide-temperature fiber optic sensor are electrically connected to the PLC system control center.

[0027] Optionally, the pressure control assembly includes a silicon carbide furnace cavity, a vacuum pump and a wide-temperature air pressure sensor;

[0028] The wide-temperature air pressure sensor is arranged in the closed box. The silicon carbide furnace cavity and the vacuum pump are arranged outside the closed box. The silicon carbide furnace cavity is communicated with the closed box through a cavity air inlet. The silicon carbide furnace cavity is also communicated with the vacuum pump through a main vacuum pipeline. A vacuum valve h is also arranged in the main vacuum pipeline.

[0029] Optionally, the silicon carbide furnace cavity is also communicated with the vacuum pump through a first pressure control pipeline branch, a second pressure pipeline branch and a third pipeline branch. Corresponding vacuum valves i, j and k are arranged in the first pressure control pipeline branch, the second pressure pipeline branch and the third pipeline branch respectively.

[0030] Optionally, the oxygen control assembly includes a wide-temperature thermal conductivity sensor, an oxygen flow controller, a vacuum supply valve, a vacuum break valve, a vacuum switching valve and a vacuum protection device;

[0031] The vacuum supply valve, the vacuum break valve and the vacuum switching valve are connected in parallel and are simultaneously connected to the oxygen flow controller. The vacuum supply valve is electrically connected to the vacuum protection device.

[0032] Optionally, the in-situ performance monitoring assembly includes a wide-temperature ultrasonic detector and a wide-temperature gloss meter detector. Both the wide-temperature ultrasonic detector and the wide-temperature gloss meter detector are electrically connected to the PLC system control center;

[0033] The wide-temperature ultrasonic detector is used to measure the changes in the propagation speed and attenuation of ultrasonic waves in the test specimens of asphalt pavement materials to determine the hardness of the asphalt pavement materials;

[0034] The wide-temperature-range gloss meter and detector is used to determine the gloss data value of the asphalt pavement material test specimen by measuring the intensity of the light emitted from the surface of the asphalt pavement material test specimen according to the law of light reflection and then converting the reflected light signal into an electrical signal through the PLC central control system;

[0035] The PLC system control center (2) is used to perform fusion processing on the received multi-source data, generate dynamic adjustment instructions, and then drive the temperature control component, the sunlight simulation component, the pressure control component, and the oxygen control component to act in coordination according to the instructions, so that the deviation between the environmental parameters and the target value meets the preset value;

[0036] Among them, the specific steps of data fusion processing are as follows:

[0037] Use Kalman filtering to eliminate sensor noise;

[0038] Extract key control feature quantities through principal component analysis PCA;

[0039] Perform dynamic decoupling calculation on the coupling effects of temperature, ultraviolet rays, air pressure, and oxygen;

[0040] The specific calculation formula is:

[0041] Multi-parameter dynamic coupling model:

[0042]

[0043] ΔP = K T→P ·ΔT + K UV→P ·ΔUV + K P→P ·ΔP intrinsic ;

[0044]

[0045] Among them, K UV→T is the influence coefficient of ultraviolet rays on temperature; K P→T is the influence coefficient of air pressure on temperature; is the influence coefficient of oxygen on temperature; K T→UV is the attenuation coefficient of temperature on ultraviolet efficiency; is the attenuation coefficient of oxygen on ultraviolet efficiency; K T→P is the coefficient of air pressure fluctuation caused by temperature change; K UV→P is the coefficient of air pressure fluctuation caused by ultraviolet change; is the influence coefficient of temperature on oxygen concentration; is the influence coefficient of air pressure on oxygen concentration; ΔT intrinsic , ΔUV intrinsic , ΔP intrinsic , ΔO 2intrinsic are the independent change amounts of each parameter;

[0046] Dynamic decoupling calculation:

[0047]

[0048] Among them, D is the decoupling matrix.

[0049] Optionally, the wide-temperature ultrasonic detector includes a wide-temperature piezoelectric ultrasonic sensor, the wide-temperature gloss meter detector includes a wide-temperature photodetector array, and the wide-temperature piezoelectric ultrasonic sensor and the wide-temperature photodetector array are both arranged in a closed box.

[0050] Optionally, the deterioration acceleration component includes an ultraviolet-temperature co-accelerator, a low-oxygen-low-pressure co-accelerator, a radiation dose monitor, an in-situ aging monitor, an acceleration factor calculation engine, an LSTM-MPC deterioration predictor, a built-in standard specimen group, a radiation-cooling-low-oxygen-high-altitude multi-field coupler, and an acceleration ratio intelligent optimizer.

[0051] Beneficial effects:

[0052] An indoor acceleration deterioration and in-situ monitoring device for asphalt materials in a plateau extreme environment according to the present invention can simultaneously simulate special environmental factor conditions such as long-term low temperature, strong ultraviolet, low oxygen content, and low air pressure and their coupling effects, ensuring the comprehensiveness of environmental simulation factors and the equivalence between the simulated environment and the natural deterioration climate environment of the target area. It can also measure data such as the performance changes of asphalt pavement materials after deterioration, such as hardness and glossiness, and the acceleration deterioration rate of asphalt pavement materials, and thus can predict and evaluate the service performance and durability of new asphalt materials in this area; it is beneficial to break through the defects of traditional natural deterioration tests, and solve technical limitations such as the incomplete simulation of complex road area climate environments in plateau extreme environments by existing environmental simulation devices, large damage to the original characteristics of samples, poor reliability of the simulated environment of the device, and high failure rates, and help build long-life and durable road projects in plateau extreme environments. Therefore, the present invention aims to comprehensively and efficiently simulate the coupling of multiple harsh factors in the plateau, break through time and space limitations, and obtain asphalt samples in extreme environments efficiently and at low cost; support in-situ real-time monitoring of the evolution of material properties, reduce interference in the sample preparation process, and accurately reflect real deterioration behaviors; adopt weather resistance improvement technologies, and the system components are stable and durable to ensure long-term accurate and reliable environmental simulation. Description of the drawings

[0053] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0054] Figure 1 This is a perspective view of an indoor accelerated deterioration and in-situ monitoring device for asphalt materials in extreme plateau environments according to the present invention.

[0055] Figure 2 It is Figure 1 a schematic diagram of the distribution of internal components in

[0056] Figure 3 It is Figure 2 a block diagram of the connection of internal components in

[0057] Figure 4 It is Figure 2 a detailed schematic diagram of the connection of internal components in

[0058] Figure 5 It is Figure 2 an enlarged view of the temperature converter, temperature protection device, liquid level protection device, and refrigerator area of the temperature control component in

[0059] Figure 6 It is Figure 2 an enlarged view of the system chemical heating and electric heating regulation and temperature control area of the temperature control component in

[0060] Explanation of the reference numerals in the drawings:

[0061]

[0062]

[0063] The realization, functional features, and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0065] It should be noted that all directional indications (such as up, down,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0066] In addition, in the present invention, descriptions such as "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0067] Moreover, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0068] Referring to Figures 1 to 6 , the present invention provides a schematic diagram of an embodiment of an indoor accelerated deterioration and in-situ monitoring device for asphalt materials in a plateau extreme environment. Among them, the device includes a closed box body 1, a PLC system control center 2, a temperature control component 3 and a sunlight simulation component 4 arranged at the top inside the closed box body 1, a pressure control component 5, an oxygen control component 6, a performance in-situ monitoring component 7 and a deterioration acceleration component 8 arranged on the inner side wall of the closed box body 1. In addition, a placement structure 101 for placing test specimens of asphalt pavement materials is arranged at the bottom inside the closed box body 1. The PLC system control center 2 is located on the outer side wall of the closed box body 1. The PLC system control center 2 is also electrically connected to the temperature control component 3, the sunlight simulation component 4, the pressure control component 5, the oxygen control component 6, the performance in-situ monitoring component 7, and the deterioration acceleration component 8 respectively. Furthermore, corresponding temperature controllers 203, sunlight simulation controllers 204, pressure controllers 205, oxygen flow controllers 206, in-situ monitoring controllers 207, and deterioration acceleration controllers 208 for controlling the temperature control component 3, the sunlight simulation component 4, the pressure control component 5, the oxygen control component 6, the performance in-situ monitoring component 7, and the deterioration acceleration component 8 are arranged in the PLC system control center 2. Thus, the effective control of the corresponding components can be achieved by controlling the respective controllers in the PLC system control center 2.

[0069] And the temperature control component 3 is used to simulate the temperature of the extreme plateau environment inside the closed box 1. For example, long-term low-temperature conditions can be created in the sealed test space; the sunlight simulation component 4 is used to simulate sunlight of different intensities in the extreme plateau environment inside the closed box 1. For example, strong ultraviolet conditions can be created in the sealed test space; the pressure control component 5 is used to simulate the air pressure of the extreme plateau environment inside the closed box 1. For example, low-pressure conditions can be created in the sealed test space; the oxygen control component 6 is used to simulate the oxygen content of the extreme plateau environment inside the closed box 1, and low-oxygen conditions can be created in the sealed test space; the performance in-situ monitoring component 7 is used to detect the hardness and gloss of the test specimens of asphalt pavement materials inside the closed box 1. Preferably, the deterioration acceleration component 8 is also electrically connected to the temperature control component 3, the sunlight simulation component 4, the pressure control component 5, and the oxygen control component 6 respectively. The deterioration acceleration component 8 is used to regulate the temperature parameters in the temperature control component 3 and / or the sunlight parameters simulated in the sunlight simulation component 4 and / or the air pressure parameters in the pressure control component 5 and / or the oxygen content in the oxygen control component 6 to accelerate the natural deterioration process of the test specimens of asphalt pavement materials inside the closed box 1. Furthermore, through the effective control of each component in the test device and the collaborative control between components, relevant data of the test specimens of asphalt pavement materials under extreme plateau environments can be effectively obtained, providing a theoretical basis for the research of asphalt pavement materials.

[0070] Furthermore, the temperature control component 3, the sunlight simulation component 4, the pressure control component 5, and the oxygen control component 6 are dynamically proportionally linked through the PLC system control center 2, and the linkage relationship satisfies:

[0071] The adjustment proportional coefficient function of ultraviolet intensity (UV) and temperature (T) is:

[0072] K UV-T = ΔUV / ΔT;

[0073] The proportional coefficient satisfies K UV-T ≤0.2. If the temperature rises by 2°C, the ultraviolet intensity needs to be reduced by no more than 0.4 W / m 2 (0.2×2 = 0.4).

[0074] The adjustment function of air pressure (P) and oxygen concentration (O2) is:

[0075] O2 = 21%×(P / 1101.3 KPa) 0.5 ±1%.

[0076] During the actual test process, first, according to the target plateau altitude, the initial values of the reference temperature, ultraviolet intensity, air pressure, and oxygen concentration are set; second, the PLC system control center 2 calculates the proportional relationship of the control quantities of each component in real time based on the multi-parameter coupling model (ultraviolet-temperature coupling, air pressure-oxygen concentration coupling, temperature-air pressure coupling, and material property feedback coupling); third, through the feedforward-feedback composite control algorithm (the feedforward algorithm predicts the interference quantity, compensates the parameter change quantity in advance, the feedback algorithm corrects the deviation, eliminates the residual error, and the feedforward and feedback are combined and superimposed to achieve precise adjustment of multiple parameters), each controller is driven to synchronously adjust the environmental parameters in proportion to achieve dynamic proportional linkage.

[0077] Furthermore, as Figure 4 shown, the temperature control component 3 includes a wide-temperature-range temperature sensor 301, a plurality of heating tubes 302, a heat preservation structure 303, a temperature protection device 304, a liquid level protection device 305, and a refrigerator 306; the wide-temperature-range temperature sensor 301 and the plurality of heating tubes 302 are located inside the closed box 1, the temperature protection device 304, the liquid level protection device 305, and the refrigerator 306 are located outside the closed box 1, and the heat preservation structure 303 is arranged on the outer wall of the closed box 1, which can ensure the constant indoor temperature of the asphalt pavement material under the simulated extreme plateau environment.

[0078] And the refrigerator 306 is connected in parallel with the temperature protection device 304 and the liquid level protection device 305, and the heating tubes 302, the temperature protection device 304, and the liquid level protection device 305 are also electrically connected to the PLC system control center 2. Preferably, each of the plurality of heating tubes 302 is further provided with a corresponding switch valve. In Figure 4 the illustrated embodiment, three heating tubes 302 are respectively connected in series with switch valves a, b, and c. Further, when the switch valves a, b, and c are completely disconnected, the heating system stops working.

[0079] As Figure 5 shown, the refrigerator 306, the temperature protection device 304, and the liquid level protection device 305 are also respectively connected in series with switch valves d, e, and f. Among them, the switch valve d can be used to control the supply of cold air in the temperature control component 3. When the temperature is too low and heating is required, the switch valves a, b, and c are closed. When the temperature is too high, the refrigerator 306 connected to the closed switch valve d is used to achieve the low-temperature effect; and the switch valve e controls the temperature protection device 304. When the switch valve e is closed, the temperature protection device 304 is triggered, causing the switch valves a, b, and c of the temperature heating system to trip automatically, and the refrigerant starts to work, reducing the temperature, thereby avoiding device failure and abnormal operation due to too high a temperature of the test device.

[0080] Further, the switching valve f mainly controls the middle liquid level protection device 305. When the liquid level in the test device exceeds a certain position, the switching valve f will be connected to the liquid level protection device 305, triggering the liquid level protection device 305 to prevent damage caused by the immersion of the temperature control component 3 due to too high liquid level, and the system cannot operate. Among them, the switching valves a, b, c, d, e, and the switching valve are all electrically connected to the PLC system control center 2.

[0081] Further, the temperature control component 3 further includes a chemical heater 307, and the chemical heater 308 is arranged in the closed box 1 and is connected in parallel with a plurality of heating tubes 302. Furthermore, by controlling the heating tubes 302 and the chemical heater 307, the heating rate of the temperature control component 3 can be controlled. And when the switching valve e is closed to activate the temperature protection device 304, the chemical heater 307 will also trip automatically.

[0082] Specifically, the chemical heater 307 includes a liquid storage and a solid placer, which can be used to place chemical reagents and solid chemical substances. In a high-altitude environment, the air is thin, and the heating tubes 302 are easily affected, and it is difficult to simulate the changes in the day-night temperature difference on the plateau. Therefore, heat can be generated by chemical reactions, which is not only not affected by air pressure and oxygen content, but also can quickly increase the temperature in case of emergency. At the same time, in order to more precisely control the heat distribution, a zoned heating system is adopted, different heating units are set, and they interact with the heating tubes 302 and the refrigerator 306 to meet the temperature requirements and heat dissipation characteristics of different regions. Its heating principle is: using the heat released by chemical reactions to control the temperature change. In specific applications, the hydration reaction of cobalt chloride and water is used, and the heat generated is used for heat storage and release in temperature control. At the same time, this hydration reaction is a reversible reaction, and the chemical materials can be recycled. This chemical reaction is not limited to the above-mentioned chemical reagents and solid chemical substances, and can also be replaced by other chemical materials that can control temperature changes.

[0083] Further, the internal PID control algorithm of the temperature controller 203 controls the refrigerator and the heating component of the device according to the deviation between the temperature set value and the feedback value, realizing the dynamic adjustment of the long-term low-temperature environment on the plateau.

[0084] Further, the sunlight simulation component 4 includes a variety of lamps 401, a reflector 402, a light propagator 403, a lens 404, a filter 405, a light uniform irradiator 406, a built-in light intensity feedback device 407, a safety protection device 408, a light intensity regulator 409, a wide-temperature fiber optic sensor 410, a calibration system 411, and an angular space control structure 412 that are interconnected; among them, the variety of lamps 401, the reflector 402, the wide-temperature fiber optic sensor 410, and the angular space control structure 412 are arranged in the closed box 1, and the angular space control structure 412 is connected to the variety of lamps 401. The angular space control structure 412 can adjust the variety of lamps 401, and thus can accurately simulate the illumination angle and spatial distribution of the sun at different times and seasons, so as to improve the accuracy of strong ultraviolet irradiation of the traditional sunlight system. Preferably, the angular space control structure 412 includes an electric rotation and pitching structure, and can accurately adjust the irradiation angle of the light source according to the information of different geographical locations, times, and seasons on the plateau.

[0085] And the light propagator 403, the lens 404, the filter 405, the light uniform irradiator 406, the built-in light intensity feedback device 407, the safety protection device 408, the light intensity regulator 409, and the calibration system 411 are arranged outside the closed box 1. Among them, the reflector 402 and the lens 404 adopt an array to optimize the spatial light distribution, and by finely adjusting the light distribution, the irradiation uniformity of the ultraviolet intensity is improved. The filter 26 adjusts the spectrum emitted by the light source of the lamp 401 to make it closer to the spectral characteristics of sunlight.

[0086] Further, the calibration system 411 is connected to the wide-temperature fiber optic sensor 410. The calibration system 411 is used to calibrate the simulation system when the standard measuring instrument is inaccurate, ensuring that its output conforms to the standards and characteristics of sunlight; the wide-temperature fiber optic sensor 410 is also connected to the sunlight simulation controller 204; the light intensity regulator 409 is electrically connected to the lens 404 and the variety of lamps 401.

[0087] Further, the safety protection device 408 and the wide-temperature fiber optic sensor 410 are electrically connected to the PLC system control center 2. Among them, the safety protection device 408 can prevent the device from malfunctioning and being unable to work properly due to excessive temperature generated when the light source is working.

[0088] Further, the sunlight simulation component 4 is also equipped with a cooler, the purpose of which is to control the device temperature and ensure the stability and accuracy of the sunlight simulation component 4.

[0089] Furthermore, a protective housing is added to the sunlight simulation component 4, which is mainly composed of an anti-ultraviolet coating and anti-ultraviolet materials to ensure that the system is not affected by a strong ultraviolet environment during operation. At the same time, the gas filling amount and pressure of the light source of the lamp 401 are optimized, which not only ensures the sufficiency of the strong ultraviolet light source, the extension of the service life and the stability of light emission, but also can adjust the intensity of ultraviolet light jointly with the PLC system control center 2. Preferably, the lamp 401 includes a xenon lamp and a metal halide lamp with an added LED light source, aiming to ensure the gas filling amount and pressure of the light source. Each lamp can be used alone or turned on simultaneously. The power of each light source can be adjusted within a certain range and is jointly controlled by the PLC system control center 2 and the sunlight simulation controller 204 for the operation and power of the component.

[0090] Furthermore, during use, by turning on or off some or all components of the lamp 401, the light propagator 403 and the light intensity regulator 409, and then through the high-precision electric rotation and pitching functions of the angle space control structure 412, the irradiation angle of the strong ultraviolet light source at different geographical locations, times and seasons is precisely adjusted. Through the regulation of the PLC system control center 2, it is ensured that the test device achieves the strong ultraviolet control effect.

[0091] Furthermore, the internal time series simulation algorithm and gradient algorithm of the sunlight simulation controller 204 work together with the PID control algorithm and the adaptive control algorithm by controlling each component to perform day-night cycle simulation and sunrise / sunset simulation with the light intensity linearly rising / falling within 30 minutes, so as to achieve the dynamic regulation of the strong ultraviolet environment on the plateau.

[0092] Furthermore, the pressure control component 5 includes a silicon carbide furnace cavity 501, a vacuum pump 502 and a wide-temperature-range air pressure sensor 503. Among them, the wide-temperature-range air pressure sensor 503 is arranged inside the closed box 1, the silicon carbide furnace cavity 501 and the vacuum pump 502 are arranged outside the closed box 1. The silicon carbide furnace cavity 501 is communicated with the closed box 1 through a cavity air inlet 504, and the silicon carbide furnace cavity 501 is also communicated with the vacuum pump 502 through a main vacuum pipeline 505. A vacuum valve h is also arranged in the main vacuum pipeline 505.

[0093] Further, the silicon carbide furnace cavity 501 is also communicated with a vacuum pump 502 through a first pressure control pipeline branch 506, a second pressure pipeline branch 507, and a third pipeline branch 508. Corresponding vacuum valves i, j, and k are provided on the first pressure control pipeline branch 506, the second pressure pipeline branch 507, and the third pipeline branch 508. The outlet ends of the vacuum valves h, i, j, and k are interconnected, and their combined outlet end is located inside the closed box 1. Thus, the air pressure inside the closed box 1 can be controlled by opening / closing the vacuum valves h, i, j, and k. Moreover, the vacuum valves h, i, j, and k are also communicated with the PLC system control center 2 and the pressure controller 205.

[0094] Further, the pressure control assembly 5 further includes a driving part. The driving part adopts electric driving and / or vacuum driving. When a low-pressure state is required, a single pneumatic or hydraulic driving system can no longer achieve the required low-pressure state. To ensure the control effect of the pressure, the driving part adopts a combination of electric driving and vacuum driving. Among them, the electric driving is used to provide stable power output to ensure that it is not affected by air pressure changes, and the vacuum driving utilizes the low air pressure environment in high-altitude areas. The two work together to reduce the energy consumption generated by the vacuum and improve the energy efficiency of the system. At the same time, the driving part is also communicated with the PLC system control center 2, and then the operation of the driving part is controlled through the PLC system control center 2.

[0095] Further, the feedforward control predictive adjustment algorithm inside the pressure controller 205 realizes fast response by predicting the control quantity based on the system physical model (pressure dynamic equation); the multi-mode dynamic control algorithm performs pressure switching and tracking control based on gradient step-down and cyclic fluctuation. The two cooperate with the PID control algorithm to control the pressure control assembly, realizing high-precision dynamic simulation and multi-scenario adaptation in the high-altitude low-air pressure environment.

[0096] Further, the oxygen control component 6 includes a wide-temperature-range thermal conductivity sensor 601, an oxygen flow controller 602, a vacuum supply valve 603, a vacuum break valve 604, a vacuum switching valve 605, and a vacuum protection device 606. Among them, the vacuum supply valve 603, the vacuum break valve 604, and the vacuum switching valve 605 are connected in parallel and are simultaneously connected to the oxygen flow controller 602. The vacuum supply valve 603 is also electrically connected to the vacuum protection device 606. Among them, the wide-temperature-range thermal conductivity sensor 601 is used to detect based on the different thermal conductivities of oxygen and other gases. That is, when oxygen passes through the sensor 601, the change in oxygen concentration is detected according to the change in thermal conductivity. And the vacuum supply valve 603 mainly controls the vacuum supply system. The wide-temperature-range thermal conductivity sensor 601 sets the oxygen content in the natural degradation environment in the PLC system control center 2 according to the obtained oxygen content in the test device. The vacuum supply valve 603 closes, and the vacuum supply system starts to operate, and the oxygen content in the test device continuously decreases.

[0097] Further, the vacuum break valve 604 mainly controls the vacuum break system. That is, when the oxygen content inside the test device is higher than the target value, the vacuum break valve 604 closes, the vacuum break system works, and the oxygen content in the test device decreases to the target value and stops.

[0098] Further, the vacuum switching valve 605 mainly controls the vacuum switching system. That is, when the oxygen in the test device is lower or higher than the target value, the vacuum valve 3 will close, and the vacuum switching system starts to operate. When the oxygen content is low, the vacuum switching system becomes the vacuum break system. Conversely, the vacuum switching system becomes the vacuum supply system.

[0099] Further, the oxygen flow generated by the oxygen control component 6 is easily affected by the temperature control component and the pressure control component, and the gas content in the device cannot reach the required content. It is regulated by the oxygen flow controller 206, which adopts distributed flow distribution technology, combines with intelligent valves, pipeline networks, and environment adaptive control algorithms, and accurately distributes oxygen to the required places. At the same time, the performance in-situ monitoring component 7 dynamically adjusts the flow of each branch pipeline to ensure the uniformity and accuracy of oxygen supply.

[0100] Further, the internal closed-loop PID control algorithm, feedforward compensation algorithm, and adaptive algorithm in the oxygen flow controller 206 cooperate to control the oxygen control component. Based on the principle of controlling the gas mixing ratio by adjusting the oxygen concentration, a high-precision dynamic simulation of the plateau hypoxic environment is realized.

[0101] Furthermore, the in-situ performance monitoring component 7 includes a wide-temperature ultrasonic detector and a wide-temperature gloss meter detector. Both the wide-temperature ultrasonic detector and the wide-temperature gloss meter detector are electrically connected to the PLC system control center 2. The wide-temperature ultrasonic detector is used to measure the changes in the propagation speed and attenuation of ultrasonic waves in the test specimens of asphalt pavement materials to determine the hardness of the asphalt pavement materials. The wide-temperature gloss meter detector is used to determine the gloss data value of the test specimens of asphalt pavement materials according to the law of light reflection by measuring the intensity of the light emitted from the surface of the test specimens of asphalt pavement materials and then converting the reflected light signal into an electrical signal through the PLC central control system. Preferably, an ultrasonic transducer, a signal amplifier, a filter, an ultrasonic pulse generator, and a data acquisition card are connected to the in-situ monitoring controller 207 to form the wide-temperature ultrasonic detector, and the hardness of the asphalt pavement materials is determined by measuring the changes in the propagation speed and attenuation of ultrasonic waves in the asphalt pavement. A gloss meter probe, a signal processor, and a calibration system are connected to the in-situ monitoring controller 207 to form the wide-temperature gloss meter detector, and the gloss data value of the asphalt pavement materials is determined according to the law of light reflection by measuring the intensity of the light emitted from the surface of the asphalt pavement and then converting the reflected light signal into an electrical signal through the PLC central control system.

[0102] Furthermore, the wide-temperature ultrasonic detector includes a wide-temperature piezoelectric ultrasonic sensor 701, and the wide-temperature gloss meter detector includes a wide-temperature photodetector array 702. The wide-temperature piezoelectric ultrasonic sensor 701 and the wide-temperature photodetector array 702 are both arranged in the closed box 1.

[0103] Furthermore, the in-situ monitoring controller 207 internally integrates a threshold control algorithm, a PID closed-loop algorithm, a model prediction algorithm, and a multi-objective optimization algorithm. The multi-algorithm cooperatively controls the in-situ performance monitoring component to realize the dynamic monitoring of the hardness of the asphalt pavement materials and the gloss data value of the test specimens.

[0104] Furthermore, the deterioration acceleration component 8 further includes an ultraviolet-temperature synergistic accelerator, a low-oxygen-low-pressure synergistic accelerator, a radiation dose monitor, an in-situ aging monitor, an acceleration factor calculation engine, an LSTM-MPC deterioration predictor, a built-in standard specimen group, a radiation-cooling-low-oxygen-high-altitude multi-field coupler, and an acceleration ratio intelligent optimizer. It can adjust the built-in light intensity regulator and ultraviolet light intensity according to the annual radiation equivalent principle, control the deterioration simulation acceleration factor, and accelerate the natural deterioration process of the asphalt pavement materials. The deterioration acceleration component is connected to each system to accelerate the natural deterioration process of the test device, enabling the test device to operate in various test modes such as low temperature, high temperature, solar radiation, low oxygen content, and low pressure. Furthermore, the deterioration simulation test efficiency of the test device is improved.

[0105] Further, the internal LSTM-MPC predictive control algorithm, adaptive PID algorithm, and multi-data fusion algorithm in the deterioration acceleration controller 208 are used to collaboratively control the deterioration acceleration components by multiple algorithms, intelligentize various extreme environmental parameters, and improve the acceleration ratio and accuracy of the asphalt aging test.

[0106] Further, in this test device, data such as temperature and pressure under the simulated plateau extreme environment are transmitted to the PLC system control center 2 through the wide-temperature-range temperature sensor 301, wide-temperature-range pressure sensor 503, wide-temperature-range fiber optic sensor 410, and wide-temperature-range thermal conductivity sensor 601. Then, according to the climate temperature, air pressure, and other information transmitted by the natural deterioration environment, the target temperature value, solar radiation amount, oxygen content, and air pressure value are set. The wide-temperature-range piezoelectric ultrasonic sensor 701 and wide-temperature-range photodetector array 702 are connected to the PLC system control center 2, and the measured values are fed back to the PLC system control center 2 in real time. Then, the PLC system control center 2 records the performance change data such as hardness and glossiness of the asphalt pavement material after deterioration under the plateau extreme environment, so as to obtain the change data of the test specimens of the asphalt pavement material under the plateau extreme environment and provide an effective theoretical basis for the research of the asphalt pavement material under the plateau extreme environment.

[0107] Further, the internal devices for indoor accelerated deterioration and in-situ monitoring of asphalt pavement materials for simulating the plateau extreme environment are all system components. The specific control method steps of the test device are as follows:

[0108] Use temperature sensors, ultraviolet radiometers, pressure sensors, oxygen concentration sensors, and in-situ monitoring components to collect environmental parameters and material performance data in the closed box in real time;

[0109] The PLC system performs fusion processing on multi-source data to generate dynamic adjustment instructions;

[0110] According to the instructions, drive the temperature control component, sunlight simulation component, pressure control component, and oxygen control component to act collaboratively, so that the deviation between the environmental parameters and the target value ≤ 5%;

[0111] If the in-situ monitoring component detects an abnormal material deterioration rate, trigger the parameter adaptive adjustment of the deterioration acceleration component.

[0112] Trigger and adaptive adjustment formula:

[0113]

[0114] Where: R actual is the deterioration rate monitored in real time (such as the hardness decay rate ΔH / Δt); R target is the preset target deterioration threshold.

[0115] Judgment condition

[0116] |e(t)| > ε (ε = 10%);

[0117] Trigger adaptive adjustment.

[0118] Based on the deterioration rate deviation, use the proportional-integral method to adjust the environmental parameters:

[0119]

[0120] X new = X old + ΔX.

[0121] Where: ΔX is the adjustment amount of environmental parameters (temperature, ultraviolet intensity, air pressure, oxygen); K P 、K i Are the proportional and integral gains respectively.

[0122] Based on the material aging kinetics model, perform multi-parameter collaborative adjustment:

[0123]

[0124] Where: K1 is the ultraviolet intensity adjustment coefficient; K2 is the temperature adjustment coefficient; K3 is the pressure adjustment coefficient; K4 is the oxygen concentration adjustment coefficient.

[0125] The adaptive adjustment algorithm terminates until |e(t)| < ε.

[0126] Among them, the specific steps of data fusion processing are:

[0127] Use Kalman filtering to eliminate sensor noise, that is, the optimal estimation algorithm (Kalman filtering algorithm) reduces the random noise in sensor measurements and improves data reliability.

[0128] First, perform state space modeling through the state equation and the observation equation;

[0129] State equation (describing the dynamic change of the system):

[0130] x k = Ax k-1 + Bu k + w k ;

[0131] Where, x k Is the state vector (such as temperature, ultraviolet intensity, pressure, oxygen); A is the state transition matrix; w k Is the process noise.

[0132] Observation equation (describing sensor measurement):

[0133] Z k= Hx k-1 + v k ;

[0134] where Z k is the sensor measurement value; H is the observation matrix; v k is the observation noise.

[0135] Secondly, perform prediction update data (perform noise reduction update data);

[0136] Predicted state:

[0137]

[0138] P k ' = AP k ' -1 A T + Q.

[0139] where P is the state covariance matrix; Q is the process noise covariance matrix;

[0140] Updated state:

[0141] K k = P k 'H T (HP k 'H T + R) -1 ;

[0142]

[0143] P k = (I - K k H)P k '.

[0144] where K k is the Kalman gain; R is the observation noise covariance matrix.

[0145] Secondly, extract key control feature quantities through principal component analysis (PCA), that is, reduce the dimension to extract the main features affecting environmental parameters and reduce redundant information.

[0146] Determination of principal components:

[0147]

[0148] Projection of principal component space:

[0149] Y = X norm ·V k ;

[0150] where X normSensor standardized data (temperature, ultraviolet, air pressure, oxygen sensor data); V k is a matrix composed of the first k eigenvectors.

[0151] Finally, based on data noise reduction processing and key feature quantities, dynamic decoupling calculation is performed on the coupling effects of temperature, ultraviolet, air pressure, and oxygen.

[0152] The specific calculation formula is:

[0153] Multi-parameter dynamic coupling model:

[0154]

[0155] ΔP = K T→P ·ΔT + K UV→P ·ΔUV + K P→P ·ΔP intrinsic ;

[0156]

[0157] Among them, K UV→T is the influence coefficient of ultraviolet on temperature, generally taken as 0.2 °C / (W / m 2 ); K P→T is the influence coefficient of air pressure on temperature, generally taken as -0.05 °C / kPa; is the influence coefficient of oxygen on temperature; K T→UV is the attenuation coefficient of temperature on ultraviolet efficiency; is the attenuation coefficient of oxygen on ultraviolet efficiency; K T→P is the coefficient of air pressure fluctuation caused by temperature change, generally taken as 0.1 kPa / °C; K UV→P is the coefficient of air pressure fluctuation caused by ultraviolet change; is the influence coefficient of temperature on oxygen concentration; is the influence coefficient of air pressure on oxygen concentration; ΔT intrinsic , ΔUV intrinsic , ΔP intrinsic , ΔO 2intrinsic are the independent change amounts of each parameter.

[0158] Dynamic decoupling calculation:

[0159]

[0160] Among them, D is the decoupling matrix.

[0161] Quantify the weather resistance effect by each control component:

[0162] The working temperature range of the PLC system control center is: -40°C to 70°C, the IP protection rating is: IP67 (dust and waterproof), MTBF (Mean Time Between Failures) ≥ 100,000 hours; the anti-UV rating of the enclosed box material is: ≥ 5000 hours (the yellowing index ΔYI < 5 after QUV-A aging), the compressive strength ≥ 50 MPa, and the linear expansion coefficient ≤ 5×10 -6 / °C; the pressure tolerance threshold of the sealing component ≤ 0.5 atm (50 kPa), the leakage rate ≤ 1×10 -4 Pa·m 3 / s, the temperature resistance range is: -50°C to 120°C; the temperature fluctuation of the temperature control component is ±0.5°C, the cooling rate ≥ 10°C / min (-40°C working condition), and the heating power density ≥ 2 W / cm 2 ; the ultraviolet intensity range of the sunlight simulation component is 0.5 - 1.5 W / m 2 @340 nm, the spectral matching degree ≥ 90%, and the light intensity non-uniformity ≤ 5%; the pressure control accuracy of the pressure control component is ±0.5 kPa, the vacuum pumping time ≤ 3 minutes (from atmospheric pressure to 50 kPa), and the leakage compensation rate ≥ 0.1 kPa / s; the oxygen concentration control accuracy of the oxygen control component is ±0.3%, the gas mixing uniformity (the oxygen concentration difference in the box ≤ 1%), and the response time ≤ 2 minutes (from 21% to 10%); the hardness measurement accuracy of the performance in-situ monitoring component is ±0.5 HRC, and the data sampling frequency ≥ 1 Hz; the acceleration factor of the deterioration acceleration component ≥ 20 (compared with natural aging), and the multi-parameter coupling control error ≤ 5%.

[0163] Control experiment

[0164] Set up the simulation experiment of this device and the traditional outdoor plateau exposure test:

[0165] Use the asphalt mixture with the same formula (90# base asphalt + 4% SBS modifier + 12% basalt aggregate), cut it into specimens of 100×100×50 mm, with 3 parallel samples in each group. The surface of the specimens is polished to Ra = 0.8 μm to eliminate the influence of processing differences.

[0166] Experimental group: Adjust the environmental parameters of this device to UV = 1.2 W / m 2 @340 nm, T = -20°C, P = 50 kPa, O2 = 10%, and conduct the test for 30 days; Control group: Natural exposure on the Qinghai-Tibet Plateau (altitude 4500 meters) for 2 years; Blank group: Store at room temperature and normal pressure in the laboratory (25°C, 101.3 kPa, 21% O2) for 30 days.

[0167] Table 1. Comparison of the aging performance data of the specimens in the three tests

[0168]

[0169] As can be seen from Table 1 above, the hardness attenuation rate of the experimental group is 12.5%, and that of the control group is 12.3%, with no significant difference. There are also no obvious differences in indicators such as crack density. After ultraviolet radiation dose compensation, the acceleration factor AF≈2.0 is finally calculated through the Arrhenius equation, that is, the 30-day experiment of the device of the present invention is equivalent to about two years of natural exposure degradation data.

[0170] In the above embodiments, those skilled in the art can adopt the prior art for software control. The present invention only protects the structure of the indoor accelerated degradation and in-situ monitoring device for asphalt materials in extreme plateau environments and the mutual connection relationship.

[0171] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. An indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments, characterized in that: The device comprises a closed box (1), a PLC system control center (2), a temperature control component (3) and a sunlight simulation component (4) arranged on the top of the closed box (1), and a pressure control component (5), an oxygen control component (6), an in-situ performance monitoring component (7) and a degradation acceleration component (8) arranged on the inner wall of the closed box (1); The bottom of the closed box (1) is also provided with a placement structure (101) for placing asphalt pavement material test specimens; The PLC system control center (2) is located on the outer wall of the closed box (1), and the PLC system control center (2) is also connected to the temperature control component (3), the sunlight simulation component (4), the pressure control component (5), the oxygen control component (6), the performance in-situ monitoring component (7), and the degradation acceleration component (8) via electrical signals; The temperature control component (3) is used to simulate the temperature of an extreme plateau environment in the closed box (1); The sunlight simulation component (4) is used to simulate sunlight of different intensities in an extreme plateau environment in a closed box (1); The pressure control component (5) is used to simulate the air pressure of an extreme plateau environment in the closed box (1); The oxygen control component (6) is used to simulate the oxygen content of an extreme plateau environment in the closed box (1); The performance in-situ monitoring component (7) is used to detect the hardness and glossiness of the asphalt pavement material test specimen in the closed box (1); The degradation acceleration component (8) is also electrically connected to the temperature control component (3), the sunlight simulation component (4), the pressure control component (5), and the oxygen control component (6), respectively. The degradation acceleration component (8) is used to adjust the temperature parameters in the temperature control component (3) and / or the sunlight parameters simulated in the sunlight simulation component (4) and / or the air pressure parameters in the pressure control component (5) and / or the oxygen content in the oxygen control component (6), so as to accelerate the natural degradation process of the asphalt pavement material test specimen in the closed box (1).

2. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 1 is characterized in that: The temperature control component (3) comprises a wide temperature range temperature sensor (301), a plurality of heating tubes (302), a heat preservation structure (303), a temperature protection device (304), a liquid level protection device (305) and a refrigerator (306); The wide temperature range temperature sensor (301) and the plurality of heating tubes (302) are located in the closed box (1); The temperature protection device (304), the liquid level protection device (305), and the refrigerator (306) are located outside the closed box (1), and the heat preservation structure (303) is arranged on the outer wall of the closed box (1); The refrigerator (306), the temperature protection device (304), and the liquid level protection device (305) are connected in parallel with each other; The heating tube (302), the temperature protection device (304), and the liquid level protection device (305) are also connected to the PLC system control center (2) via electrical signals.

3. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 2 is characterized in that: The temperature control component (3) further comprises a chemical heater (307), wherein the chemical heater (307) is arranged in the closed box (1) and is connected in parallel with the plurality of heating tubes (302).

4. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 1 is characterized in that: The sunlight simulation component (4) includes a plurality of lamps (401), a reflector (402), a light propagator (403), a lens (404), a filter (405), a light uniformity irradiator (406), a built-in light intensity feedback device (407), a safety protection device (408), a light intensity regulator (409), a wide temperature range optical fiber sensor (410), a calibration system (411) and an angle space control structure (412); A plurality of lamps (401) are each used to emit ultraviolet light; A plurality of lamps (401), a reflector (402), a wide temperature range optical fiber sensor (410), and an angle space control structure (412) are arranged in a closed box (1); the angle space control structure (412) is connected to the plurality of lamps (401) to adjust the illumination angle of each lamp (401); The light propagator (403), the lens (404), the filter (405), the light uniformity irradiator (406), the built-in light intensity feedback device (407), the safety protection device (408), the light intensity regulator (409) and the calibration system (411) are arranged outside the closed box (1), and the light intensity regulator (409) is connected to the lens (404) and the various lamps (401) by electrical signals; The safety protection device (408) and the wide temperature range optical fiber sensor (410) are connected to the PLC system control center (2) via electrical signals.

5. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 1 is characterized in that: The pressure control component (5) comprises a silicon carbide furnace chamber (501), a vacuum pump (502) and a wide temperature range air pressure sensor (503); The wide temperature range air pressure sensor (503) is arranged in a closed box (1), and the silicon carbide furnace cavity (501) and the vacuum pump (502) are arranged outside the closed box (1). The silicon carbide furnace cavity (501) is connected to the closed box (1) through a cavity air inlet (504), and the silicon carbide furnace cavity (501) is also connected to the vacuum pump (502) through a main vacuum pipeline (505), and a vacuum valve h is also arranged in the main vacuum pipeline (505).

6. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 5 is characterized in that: The silicon carbide furnace chamber (501) is also connected to the vacuum pump (502) via a first pressure-controlled pipeline branch (506), a second pressure pipeline branch (507), and a third pipeline branch (508); the first pressure-controlled pipeline branch (506), the second pressure pipeline branch (507), and the third pipeline branch (508) are all provided with corresponding vacuum valves i, j, and k.

7. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 6 is characterized in that: The oxygen control component (6) comprises a wide temperature range thermal conductivity sensor (601), an oxygen flow direction controller (602), a vacuum supply valve (603), a vacuum breaking valve (604), a vacuum switching valve (605) and a vacuum protection device (606); The vacuum supply valve (603), vacuum breaking valve (604), and vacuum switching valve (605) are connected in parallel and simultaneously connected to the oxygen flow controller (602), and the vacuum supply valve (603) is electrically connected to the vacuum protection device (606).

8. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 7 is characterized in that: The performance in-situ monitoring component (7) comprises a wide temperature range ultrasonic detector and a wide temperature range gloss measurement detector, and the wide temperature range ultrasonic detector and the wide temperature range gloss measurement detector are both connected to the PLC system control center (2) via electrical signals; The wide temperature range ultrasonic detector is used to measure the change in the propagation speed and attenuation of ultrasonic waves in the asphalt pavement material test specimen to determine the hardness of the asphalt pavement material; The wide temperature range gloss metering detector is used to measure the intensity of light emitted from the surface of the asphalt pavement material test specimen according to the law of light reflection, and then convert the reflected light signal into an electrical signal through the PLC central control system to determine the gloss data value of the asphalt pavement material test specimen; The PLC system control center (2) is used to perform fusion processing on the received multi-source data, generate dynamic adjustment instructions, and then drive the temperature control component, the sunlight simulation component, the pressure control component and the oxygen control component to act in coordination according to the instructions, so that the deviation between the environmental parameter and the target value meets the preset value; The specific steps of data fusion processing are as follows: Kalman filtering is used to eliminate sensor noise; Extract key control features through principal component analysis PCA; Dynamically decouple the coupling effects of temperature, ultraviolet light, air pressure, and oxygen; The specific calculation formula is: Multi-parameter dynamic coupling model: Among them, K UV→T K is the influence coefficient of ultraviolet light on temperature; P→T is the influence coefficient of air pressure on temperature; K is the influence coefficient of oxygen on temperature; T→UV is the attenuation coefficient of temperature on UV efficiency; K is the attenuation coefficient of oxygen to ultraviolet efficiency; T→P K is the coefficient of air pressure fluctuation caused by temperature change; UV→P is the coefficient of air pressure fluctuation caused by ultraviolet changes; is the influence coefficient of temperature on oxygen concentration; is the influence coefficient of air pressure on oxygen concentration; ΔT intrinsic , ΔUV intrinsic , ΔP intrinsic , ΔO 2intrinsic is the independent variation of each parameter; Dynamic decoupling calculation: Where D is the decoupling matrix.

9. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 8 is characterized in that: The wide temperature range ultrasonic detector comprises a wide temperature range piezoelectric ultrasonic sensor (701), and the wide temperature range gloss measurement detector comprises a wide temperature range optical detector array (702). The wide temperature range piezoelectric ultrasonic sensor (701) and the wide temperature range optical detector array (702) are both arranged in a closed box (1).

10. The indoor accelerated degradation and in-situ monitoring device for asphalt materials in plateau extreme environments according to claim 1 is characterized in that: The degradation acceleration component (8) comprises an ultraviolet-temperature synergistic accelerator, a low oxygen-low air pressure synergistic accelerator, a radiation dose monitor, an in-situ aging monitor, an acceleration factor calculation engine, an LSTM-MPC degradation predictor, a built-in standard test piece group, a radiation-cold-low oxygen-high altitude multi-field coupler and an acceleration ratio intelligent optimizer.

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