Agricultural irrigation metering control system and its control method

Abstract

The invention discloses a metering control system for agricultural irrigation and a control method thereof. It comprises a motor well and a deep water tank. A liquid level transmitter is arranged in the deep water tank. The liquid level transmitter is connected with a controller, and the controller is connected with a water pump. The control method includes S1: set up a deep water tank next to the machine well, and install a liquid level transmitter in the deep water tank; S2: the controller sets the minimum limit water level value and obtains the liquid level signal of the liquid level transmitter; S3: judges whether the liquid level signal is low If it is lower than the minimum limit water level, turn off the water pump and return to S2; otherwise, enter S4; S4: the controller detects whether the water pump is in working state, and if so, enter S6; otherwise, enter step S5; S5: the controller controls the start of the water pump and then enters step S6 ; S6: Delay for m seconds, return to S2. Beneficial effects: easy installation and replacement, avoiding the entanglement and collision of the liquid level transmitter with other equipment; the liquid level transmitter has high liquid level detection accuracy; small error, long service life; long transmission distance, small signal attenuation, and high detection accuracy high.

Description

technical field [0001] The invention relates to the technical field of water level detection, in particular to an agricultural irrigation metering control system and a control method thereof. Background technique [0002] Groundwater is an important source of water supply in northern China and many cities. People often use underground drilling rig wells to extract groundwater from the rig wells to meet people's living drinking water and agricultural irrigation. Agricultural irrigation requires a lot of water, and the wells are often deep, and the water level of the wells needs to be detected at all times. In the prior art, people often put the liquid level transmitter directly into the wells to detect the water level. However, due to the small space of the general well, and the large space occupied by the pumping pump and the pumping pipe, the space of the pumping well is smaller. It is difficult to put in, and it may cause damage to the liquid level transmitter, water pum...

AI Technical Summary

Problems solved by technology

Water intake for agricultural irrigation requires a large amount of water, and the motorized wells are often deep, and the water level of the motorized well needs to be detected at all times. However, in the prior art, people often put the liquid level transmitter directly into the motorized well to detect the water level. However, due to the small space of the general well, and the large space occupied by the suction pump and the suction pipe, the space of the well is smaller. During the process of putting the liquid level transmitter into the liquid level transmitter, the liquid level transmitter is easy to collide with or entangle with the suction pipe. It is difficult to put in, and it may cause damage to the liquid level transmitter, suction pipe, and pump, resulting in a short service life of the liquid level transmitter, low detection accuracy of the liquid level in the well, and poor control effect of the pumping control system, which cannot meet people's needs.

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