Water pump automatic control method based on pressure signal

Abstract

The invention discloses a water pump automatic control method based on a pressure signal, which comprises the following steps: after a water pump is started, acquiring a current pressure value and a current voltage value of the water pump, judging whether the voltage of the water pump is abnormal according to the current voltage value, if so, carrying out shutdown protection, if not, acquiring a current current value of the water pump, judging whether the water pump is in a stuck state or not according to the current current value, if yes, carrying out shutdown protection, if not, judging the running state of the water pump according to an absolute value of the difference value between the current voltage value and the last voltage value, and then carrying out corresponding water pump protection according to the running state of the water pump. According to the water pump automatic control method based on the pressure signal provided by the invention, automatic control over the water pump is achieved, the water pump can be effectively protected, and the water pump automatic control method has the advantages of being low in cost, stable in control, high in applicability and convenient to maintain.

Description

technical field [0001] The invention relates to the field of water pump control, in particular to an automatic control method of a water pump based on a pressure signal. Background technique [0002] With the improvement of people's living standards and automation requirements, automatic control of water pumps is becoming more and more common, which solves the need for manual start and stop of water pumps during use, and improves efficiency; especially in civil and agricultural water supply systems, There is an increasing demand for automatically controlled water pumps. [0003] In order to improve the automation of the water pump, the sensor technology is used to detect the pressure signal and water flow signal of the water pump, and the start and stop of the water pump is intelligently controlled by the controller to achieve the automatic start and stop of the water pump. At present, flow switch sensors and pressure switch sensors are commonly used. These sensors output s...

AI Technical Summary

Problems solved by technology

At present, flow switch sensors and pressure switch sensors are commonly used. These sensors output switch signals, and the controller controls the start and stop of the water pump according to the received pressure switch signals and / or water flow switch signals; However, due to the structural factors of this type of sensor itself, the detection accuracy is low, there is a control blind area, or the frequent start and stop of the water pump is caused, resulting in a reduction in the service life of the water pump; in addition, the faults that occur during the operation of the water pump cannot be judged in time.

Images