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CN-121973519-A - Self-heating heat-preservation covering film system of asphalt concrete transport vehicle and control method thereof

CN121973519ACN 121973519 ACN121973519 ACN 121973519ACN-121973519-A

Abstract

The invention discloses a self-heating heat-preserving covering film system of an asphalt concrete transport vehicle and a control method thereof, which relate to the technical field of road construction material transportation, and comprise a composite film body, an energy recovery module, an intelligent control unit and a multi-source data acquisition module; the composite film body sequentially comprises a weather-proof waterproof layer, an electrothermal functional layer, a bionic honeycomb thermal management layer and an aluminum foil reflecting layer from outside to inside. The bionic honeycomb thermal management layer has the beneficial effects that through the shape memory alloy phase change characteristic of the bionic honeycomb thermal management layer, the honeycomb units are closed to form a heat insulation air chamber in a low-temperature environment, the heat conduction coefficient is reduced, the heat insulation efficiency is improved, meanwhile, the honeycomb units are triggered to expand in a high-temperature environment to form a vertical exhaust channel, the exhaust efficiency of harmful gases such as benzopyrene is improved, and the contradiction between heat preservation and exhaust emission is solved.

Inventors

  • MA PING
  • LI ZHENGYANG
  • Liu Dianhan

Assignees

  • 马平

Dates

Publication Date
20260505
Application Date
20251231

Claims (10)

  1. 1. An asphalt concrete transportation vehicle self-heating insulation cover film system, comprising: the composite film body sequentially comprises a weather-proof waterproof layer (10), an electrothermal functional layer (20), a bionic honeycomb thermal management layer (30) and an aluminum foil reflecting layer (40) from outside to inside; The energy recovery module is integrated at the edge of the composite membrane body and comprises a piezoelectric power generation unit (50) and a thermoelectric conversion unit (60); The intelligent control unit is electrically connected with the electric heating functional layer (20), the bionic honeycomb thermal management layer (30) and the energy recovery module, and is internally provided with a lightweight neural network prediction engine; The multi-source data acquisition module comprises an asphalt surface temperature sensor array, a vehicle motion state sensor and an environment temperature and humidity sensor; the bionic honeycomb thermal management layer (30) is closed to form a heat insulation air chamber at the temperature of <10 ℃, and is unfolded to form a vertical exhaust channel at the temperature of >60 ℃; The intelligent control unit predicts the temperature field distribution of asphalt concrete according to the multi-source data, and dynamically adjusts the power of the electric heating functional layer and the opening and closing states of the honeycomb layer in a partition mode.
  2. 2. The self-heating insulation covering film system of asphalt concrete transportation vehicle according to claim 1, wherein the bionic honeycomb thermal management layer (30) comprises a plurality of honeycomb units, the honeycomb units are composed of a shape memory alloy framework (31) and a thermosensitive polymer covering film (32), the phase transition temperature is 60-80 ℃, the honeycomb units are of a regular hexagon structure, and the unit aperture is 5-8mm.
  3. 3. The self-heating insulation cover film system of an asphalt concrete transportation vehicle according to claim 1, wherein the energy recovery module comprises: The piezoelectric power generation unit (50) adopts a PZT-5H piezoelectric ceramic array, is arranged at the edge of the windward side of the covering film, and captures mechanical vibration energy which is more than or equal to 50Hz in the running process of the vehicle; the thermoelectric conversion unit (60) is a Bi 2 Te 3 semiconductor thermoelectric sheet, is attached to the outer surface of the aluminum foil reflecting layer (40), and recovers the thermal energy of the film and the environmental temperature difference; the piezoelectric power generation unit (50) and the thermoelectric conversion unit (60) are output in parallel through a double-input DC/DC conversion circuit, and power is supplied to the electrothermal functional layer (20) preferentially.
  4. 4. The asphalt concrete transportation vehicle self-heating insulation cover film system of claim 1, wherein the execution logic of the lightweight neural network prediction engine comprises: the input layer receives real-time data of the temperature sensor array, the GPS position and speed of the vehicle, the ambient temperature and humidity and a historical temperature decay curve; Constructing an asphalt concrete three-dimensional heat conduction model by the hidden layer through an LSTM network, and outputting a future 15-minute temperature field distribution prediction; The output layer generates a zonal temperature control instruction that the power density of the edge area of the carriage is increased to 250-300W/m 2 , and the power density of the central area is reduced to 50-100W/m 2 .
  5. 5. The self-heating heat-preservation covering film system of the asphalt concrete transportation vehicle according to claim 4, wherein when the standard deviation of a predicted temperature field is more than or equal to 3 ℃, the intelligent control unit synchronously triggers: Starting an electrothermal functional layer in a low-temperature area to compensate heating; the high temperature region opens the exhaust channel of the bionic honeycomb layer (30) and reduces the heating power in that region.
  6. 6. The self-heating insulation cover film system of an asphalt concrete transportation vehicle according to claim 1, wherein said electrothermal functional layer (20) comprises: the base material is a polyimide flexible film; The flexible heating wire (21) is embedded into the base material by a snake-shaped wiring, and the material is carbon fiber-copper-nickel alloy composite wire.
  7. 7. The self-heating insulation covering film system of the asphalt concrete transportation vehicle according to claim 6, wherein the flexible heating wires (21) are divided into at least 6 'back' independent temperature control areas according to the heat dissipation distribution of the carriage.
  8. 8. The asphalt concrete transportation vehicle self-heating insulation cover film system of claim 1, further comprising an energy collaborative management strategy: When the output power of the energy recovery module is more than or equal to 20% of the total power consumption of the system, the power supply of the vehicle battery is forbidden; when the vehicle is braked, the surplus electric energy of the energy recovery module is stored in the super capacitor and is used for peak power compensation in a starting stage.
  9. 9. The self-heating insulation covering film system of an asphalt concrete transportation vehicle according to claim 1, wherein the intelligent control unit is connected with a cab terminal through a LoRa wireless communication module, and displays in real time: temperature field cloud picture of asphalt concrete; heating power duty ratio of each partition; Instantaneous power generation of the energy recovery module and accumulated energy saving data.
  10. 10. A control method of a self-heating insulation cover film system of an asphalt concrete transportation vehicle based on any one of claims 1-9, comprising the steps of: S1, acquiring environmental parameters, vehicle motion states and asphalt surface temperature through a multi-source data acquisition module; s2, calculating temperature field distribution by a lightweight neural network prediction engine, and identifying a low-temperature risk area and a high-temperature aggregation area; s3, if the overall temperature is less than or equal to 145 ℃, starting the global basic heating of the electrothermal functional layer (20); s4, dynamically executing a partition strategy: Applying compensation heating to the low-temperature risk area, reducing power to the high-temperature aggregation area and starting a honeycomb exhaust channel; And S5, monitoring the output of the energy recovery module in real time, and cutting off the power supply of the vehicle battery when the power of the energy recovery module is more than or equal to a set threshold value.

Description

Self-heating heat-preservation covering film system of asphalt concrete transport vehicle and control method thereof Technical Field The invention relates to the technical field of road construction material transportation, in particular to a self-heating heat-preservation covering film system of an asphalt concrete transportation vehicle and a control method thereof. Background The high temperature of 140-160 ℃ is required to be maintained in the transportation process of the asphalt concrete so as to ensure the compactness during paving. However, under a low-temperature environment such as-10-5 ℃, three technical bottlenecks exist in the traditional heat preservation scheme: The common tarpaulin and the cotton quilt only depend on the air heat insulation layer to delay heat dissipation, and the actually measured cooling rate still reaches 5-8 ℃ per hour. When the transport distance is >50km, the asphalt temperature is generally below 130 ℃, resulting in an increase in road porosity of 35% -40% after paving. Although the temperature reduction rate of the vacuum double-layer tarpaulin is reduced to 3-4 ℃ per hour, the vacuum layer is easy to damage and lose efficacy, and the existing heat loss cannot be compensated. When the temperature of the asphalt surface is over 180 ℃ due to the sudden change of the environmental temperature, such as the temperature rise to more than 10 ℃ caused by sunlight, two major problems are caused, namely, 1) the concentration of harmful gases accumulated, benzopyrene and other cancerogenic substances can reach 120 mug/m 3 times higher than the national standard limit value, 2) the material is locally aged, the asphalt softening point in a high-temperature area is reduced by 15 ℃, and the service life of the pavement is influenced. What is needed is a mobile thermal insulation system that integrates active heat supplement, dynamic temperature regulation, and exhaust gas management, and does not rely on external energy or vehicle retrofitting. Disclosure of Invention The invention aims to provide a self-heating heat-preservation covering film system of an asphalt concrete transportation vehicle and a control method thereof, which can solve the contradiction between the over-fast low-temperature heat dissipation and the accumulation of high-temperature harmful gas in the transportation of asphalt concrete. In order to solve the technical problems, the invention adopts the following technical scheme: a self-heating heat-preservation covering film system of an asphalt concrete transport vehicle comprises a composite film body, an energy recovery module, an intelligent control unit and a multi-source data acquisition module; The composite film body sequentially comprises a weather-proof waterproof layer, an electrothermal functional layer, a bionic honeycomb thermal management layer and an aluminum foil reflecting layer from outside to inside; The energy recovery module is integrated at the edge of the composite membrane body and comprises a piezoelectric power generation unit and a thermoelectric conversion unit; The intelligent control unit is electrically connected with the electric heating functional layer, the bionic honeycomb thermal management layer and the energy recovery module, and a lightweight neural network prediction engine is arranged in the intelligent control unit; The multi-source data acquisition module comprises an asphalt surface temperature sensor array, a vehicle motion state sensor and an environment temperature and humidity sensor; the bionic honeycomb thermal management layer is closed to form a heat insulation air chamber at the temperature of <10 ℃, and is unfolded to form a vertical exhaust channel at the temperature of >60 ℃; The intelligent control unit predicts the temperature field distribution of asphalt concrete according to the multi-source data, and dynamically adjusts the power of the electric heating functional layer and the opening and closing states of the honeycomb layer in a partition mode. Preferably, the bionic honeycomb thermal management layer comprises a plurality of honeycomb units, the honeycomb units are composed of a shape memory alloy framework and a thermosensitive polymer coating film, the phase transition temperature of the honeycomb units is 60-80 ℃, the honeycomb units are of a regular hexagon structure, and the unit aperture is 5-8mm. Preferably, in the energy recovery module: The piezoelectric power generation unit adopts a PZT-5H piezoelectric ceramic array, is arranged at the edge of the windward side of the covering film, and captures mechanical vibration energy which is more than or equal to 50Hz in the running process of the vehicle; The thermoelectric conversion unit adopts a Bi 2Te3 semiconductor thermoelectric sheet, is attached to the outer surface of the aluminum foil reflecting layer, and recovers the thermal energy of the film body and the environmental temperature difference; The piezoelectric power generation u