Device and method for monitoring working condition of automatic irrigation fertilizer distributor

Abstract

The invention discloses a device and method for monitoring the working condition of an automatic irrigation fertilizer distributor. A fertilizer mixing tank is provided with a device for detecting the liquid level of the fertilizer mixing tank; the output signals of an EC (Electrical Conductivity) value sensor, a pH value sensor, the device of detecting the liquid level of the fertilizer mixing tank and a flow meter are respectively connected with an intelligent controller; a fertilizer-application control solenoid valve, a fertilizer mixing control solenoid valve, an irrigation control solenoid valve, an irrigated area control solenoid valve, a fertilizer adsorption control solenoid valve, a water supply pump and a fertilizer application pump are respectively connected to an electrical control system; and the electrical control system is connected with the intelligent controller. The states of the whole working processes of supplying water, adsorbing a fertilizer, preparing a nutrient solution and irrigating / applying the fertilizer can be monitored, and the practical fertilizer proportion of the nutrient solution conforms to the preset proportion requirement.

Description

technical field [0001] The invention relates to an automatic irrigation and fertilization machine working state monitoring system and a monitoring method thereof, in particular to an automatic irrigation and fertilization machine working state monitoring device and a monitoring method for the micro-drop irrigation system of facility agriculture. Background technique [0002] my country's modern greenhouses, solar greenhouses and plastic greenhouses have a large planting area of ​​facility agriculture, and facility agriculture automation equipment technology has also been greatly developed. Not only micro-drip irrigation systems are widely used, but also automatic irrigation and fertilization machines that can complete irrigation and fertilization at one time. been promoted. The automatic irrigation and fertilization machine can automatically mix various fertilizers and nutrients into various proportions of nutrient solutions according to the needs of facility crops while irri...

AI Technical Summary

Problems solved by technology

For example, the Nutriflex and NutriMix series of automatic irrigation and fertilization systems of the Netherlands Priva Company, and the intelligent control system for greenhouse drip irrigation and fertigation disclosed in the patent application number 03104695.9 all have nutrient solution EC (conductivity) value / pH value monitoring and mixed fertilizer tank liquid position monitoring device; the patent application number is 03104695.9 The intelligent control system for drip irrigation and fertilization in greenhouses can also monitor the status of pumps and valves, but no specific implementation is given; the integrated automatic irrigation and fertilization filter disclosed in ZL03206584.1 The machine is equipped with a fertilizer suction speed indicating device in front of each Venturi fertilizer injector, so as to manually monitor the fertilizer suction status

However, none of the above systems or devices has realized the state monitoring of the whole working process of the automatic irrigation and fertilization machine from water supply, fertilizer absorption, nutrient solution preparation to irrigation / fertilization, especially the automatic monitoring of the fertilizer absorption link.

However, when one of the multi-channel fertilizer mother liquors fails to absorb fertilizer, it is often possible to achieve the required EC value / pH value of the nutrient solution by injecting additional amounts of other fertilizer mother liquors, which leads to the inability to monitor the EC value / pH value of the nutrient solution. The discovery of this fault is not only difficult to find, but also directly causes the actual fertilizer ratio to deviate far from the expected requirements, which may cause significant damage to the facility crops

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