Working principle of agricultural drip irrigation fertilization control system

The working principle of agricultural drip irrigation fertilization control system

1 Irrigation control

Irrigation is divided into three irrigation control methods: manual intervention, timed quantification, and conditional control. Regardless of the control method, when the starting conditions of the irrigation are met, first open the field question valve and the main control valve, and then start the pump to start irrigation. When a set of valve irrigation is over, first open the next set of valves, and then close the irrigation valve (the pump is always running). When all the field valves that need to be irrigated are completed, first turn off the pump, and then turn off the main control valve and field valve, so. A irrigation process is over.

2 Fertilization control

The method of fertilization of nutrient solution is also divided into manual intervention, timing quantification, and conditional control. When fertilizing the nutrient solution, the computer system uses the selected formula and the set nutrient solution pH and EC values to mix the water and fertilizer of the pilot. According to the deviation between the set value and the detection value of the pH and EC, the frequency of fertilizer injection of the hybrid valve is adjusted, and the difference between the detection value and setting value of the nutrient solution can be reached within the allowable range in a short period of time.

When a set of field valves ends. Open the next set of valves first, and then close the running valve. When all the field valves that need to be fertilized are finished, first turn off the fertilization pump and pump, then turn off all the valve that is being opened to end fertilization control.

3 Filter automatic roll -out washing control

There are two control methods of filter rushing, one is automatic control. One is a manual control of the computer. Automatic control is to use differential pressure switch monitoring filters to enter and exit differential pressure. Dang the filter is blocked. When the differential pressure of the two ends reaches the set value, the current work is interrupted immediately, and the filter group can be rushed in order. The length of the rinse time can be set at arbitrarily. After the washing, the original operating status of the system can be restored.

Filter reverse washing manual control: When the filter is considered to be rushing, the start button on the backwash program interface can be performed at any time, and the filter can be performed at any time.

4 valve group

The system is divided into 20 valve groups. Each valve group can set up 1 to 4 valves to irrigate at the same time in the valve in the same valve group. Therefore, the entire system controls up to 80 solenoid valves.

The main characteristics of agricultural drip irrigation fertilization control system

1 Powerful function. Simple operation

With manual intervention, timing quantification, and conditional control of breeding irrigation fertilization control methods, users can choose according to the actual use. At the same time, the system also has functions such as filter routing, information query, and security protection.

2 The system hardware configuration is high, stable performance, low price

The system controls hardware to select imported PLCs and touch screens, and the execution agency is imported solenoid valves and pumps to ensure the reliability and stability of the system.

3 Water -saving, fertilizer, provincial labor, reduce labor intensity, and improve the level of automation management.

4 Strong practicality. Wide range of applications

It can be widely used in irrigation and fertilization management of vegetables, flowers, fruit trees, and edible fungi, and has strong versatility. High control accuracy has proved that the system's nutritional liquid concentration EC and pH pH are well regulated, and the control accuracy can reach EC ≤ EC ± 0.1ms / CM, PH ≤PH ± 0.2.