Method, device and system for acquiring temperature of air in vehicle in real time

Abstract

The invention provides a method, device and system for acquiring air temperature of air in vehicle in real time, and the method comprises the steps: building a heat transfer node heat network according to the maintenance structure and heat flow relation of a front-row left temperature region in the vehicle, wherein the heat transfer node heat network comprises a plurality of nodes, and the nodes are divided into external nodes and internal nodes; Calculating the radiant heat flow absorbed by the external nodes according to the transmissivity and reflectivity of the external node, the includedangle between the normal direction of the corresponding surface of the external node and the sunlight and the sunlight intensity, wherein the radiant heat flow rate of the internal node is 0; According to the node area, the environment temperature, the node temperature, the heat exchange coefficient, the radiation heat flow rate, the vehicle speed and the air flow speed in the passenger compartment, calculating the heat flow rates of all nodes except the air node and the sun node outside the vehicle; Calculating the temperature of any node at any moment; Calculating in-vehicle air temperature.The technical problems that in the prior art, when the internal temperature of a vehicle is monitored, the working process is complex, and cost is high are solved.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a method, device and system for real-time acquisition of air temperature inside a vehicle. Background technique [0002] With the development of the automobile industry and the improvement of people's needs, an automatic air-conditioning system that can automatically adjust the air condition in the car in time and automatically according to changes in factors such as outdoor air temperature, solar radiation intensity, vehicle speed, engine heat load, and indoor human body heat dissipation. be more and more widely used. [0003] At present, the automatic air conditioning control system is mostly based on the negative feedback control system of the temperature inside the car. By controlling the temperature of the air outlet, the air volume, etc., the temperature inside the car is adjusted to reach the target value. Therefore, the feedback that the current temperature in the car is correct a...

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Problems solved by technology

[0004] Based on the above problems, the present invention proposes a method, device and system for obtaining the air temperature in the vehicle in real time, which solves the technical problem of complicated working process and high cost in the prior art when monitoring the internal temperature of the vehicle

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