Water-saving irrigation method and controller on the basis of CAN bus

Abstract

The invention relates to a water-saving irrigation method on the basis of a CAN bus. The method comprises the following steps: a power supply module supplies power to a water-saving irrigation controller, and a man-machine interaction module displays the operation state of a system and realizes manual operation on the controller; a micro-control module of the water-saving irrigation controller is connected with a CAN network via a CAN bus interface module; a sensor signal acquisition module samples and acquires irrigation (soil moisture, temperature, water source liquid level, etc. ) information in a predetermined time interval; the micro-control module acquires weather information via the CAN network; the micro-control module receives the weather information and the irrigation information and works out irrigation strategy information; and a control signal output module receives the irrigation strategy information and controls on / off of a magnetic valve according to the irrigation strategy information. A CAN bus technology is applied to the water-saving irrigation controller from a step of water-saving irrigation automatic control so that practical requirements can be greatly met and thus the water-saving irrigation method has larger application prospect.

Description

technical field [0001] The invention relates to a CAN bus-based water-saving irrigation method and a controller. Background technique [0002] China is a country short of water resources. The per capita water resources are about 1 / 4 of the world's average level. China is listed as one of the 13 water-poor countries by the United Nations. The shortage of water resources is a prominent problem faced by the sustainable and stable development of my country's economy and society for a long time. The fundamental way to alleviate this problem is to save water, mainly to develop water-saving irrigation. Using automatic control technology to realize water-saving irrigation automation is an effective way to improve the utilization rate of water resources and alleviate the shortage of agricultural water use. [0003] Fieldbus technology is an important means to construct automatic control network system for water-saving irrigation. At present, domestic scientific research institutions...

AI Technical Summary

Problems solved by technology

However, the use of RS-485 can only constitute a master-slave structure system, and the communication method can only be carried out by polling by the master station. The real-time performance and reliability of the system are relatively poor.

2) The CAN bus network is very flexible, and the maximum communication speed can reach 1Mbps, while the flexibility of RS485 bus communication and networking is not strong, and the communication speed is also low

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