CAN bus-based distributed control system for controlled atmosphere fresh-keeping transport vehicle and realization method thereof

Abstract

The invention discloses a CAN bus-based distributed control system for a controlled atmosphere fresh-keeping transport vehicle and the realization method thereof. The control system comprises a main controller node and communication nodes, wherein the main controller node comprises an ARM control panel with a CAN communication port and a touch screen, the main controller node is installed on the instrument panel in the cab of the controlled atmosphere fresh-keeping transport vehicle, the communication nodes comprise a pressure chamber node, a vehicle head node, a negative pressure chamber node and a fresh-keeping chamber node, and the main controller node communicates with the communication nodes through CAN buses. The communication medium employs bi-core leads with shielding net. Four communication nodes of the pressure chamber node, the vehicle head node, the negative pressure chamber node and the fresh-keeping chamber node and the main control node are employed, and communication among all nodes is carried out through CAN buses. The working stability of the system is improved. The control system has fault diagnosis function, acquires the sensor parameter scope and performer working current of the communication nodes on a real-time basis, and determines the working state of devices after calculation and analysis.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping transportation of agricultural products, and in particular relates to a distributed control system of a modified atmosphere fresh-keeping transportation vehicle based on a CAN bus and an implementation method thereof. Background technique [0002] The modified atmosphere fresh-keeping technology is a storage and fresh-keeping method that can comprehensively control the ambient temperature, relative humidity and gas composition. The air-conditioned fresh-keeping transport vehicle can realize real-time regulation of environmental parameters such as temperature, relative humidity, oxygen volume fraction and carbon dioxide volume fraction in the compartment, improve the fresh-keeping quality of stored and transported agricultural products, and reduce losses. Controlled atmosphere fresh-keeping transportation technology has a certain research foundation abroad, but it mainly focuses on the resear...

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Problems solved by technology

Controlled atmosphere fresh-keeping transportation technology has a certain research foundation abroad, but it mainly focuses on the research of controlled atmosphere containers, and the transportation equipment designed for long-distance transportation such as sea transportation, and the controlled atmosphere equipment is mainly nitrogen generators, which has high cost. , slow air adjustment speed and extensive control

Our country started relatively late in the technology of controlled atmosphere fresh-keeping, and the foundation is relatively weak. The control system of the control system of the controlled atmosphere fresh-keeping transportation equipment is not high. It is urgent to develop a stable and high-precision control system suitable for the controlled atmosphere fresh-keeping transportation vehicle.

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