Irrigation time calculation method based on APSO-ELM and fuzzy logic

Abstract

The invention discloses an irrigation time calculation method based on APSO-ELM and fuzzy logic. The method is specifically implemented according to the following steps that 1, an irrigation online monitoring system is constructed, crop growth environment parameters are monitored in real time, an APSO-ELM model is established, growth environment data obtained through monitoring serve as input through the APSO-ELM network prediction model, and the evaporation capacity of a prediction reference crop is output; a fuzzy control irrigation time forecasting model is established; 2, the crop evaporation transpiration and soil humidity drop rate data obtained in the step 1 are taken as input of fuzzy control, the irrigation time required by the crops is input into the fuzzy control irrigation timeforecasting model, and finally the irrigation time required by the crops is output, so that irrigation time calculation is completed. The problem that the network forecasting precision is unstable due to the randomly generated weight and threshold of the input layer and the hidden layer of the ELM algorithm in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of facility agriculture and relates to an irrigation time calculation method based on APSO-ELM and fuzzy logic. Background technique [0002] my country is a large agricultural country, but water resources are very scarce. my country's total freshwater resources are 2.8 trillion M3. Although the total amount seems to be a lot, it actually only accounts for 6% of the world's per capita freshwater resources, which is about a quarter of the world's per capita freshwater resources. It is one of the countries with relatively scarce per capita water resources in the world. Among them, agricultural water accounts for about 70% of the total water consumption. Due to the generally low irrigation efficiency, the water utilization rate is only 45%. Therefore, solving the problem of agricultural irrigation water use is very important to alleviate the shortage of water resources, and has become our Main content to focus...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of irrigation time calculation method based on APSO-ELM and fuzzy logic, solve the weight and the threshold that the ELM algorithm input layer and the hidden layer that exist in the prior art randomly generate to the network prediction accuracy. unstable problem

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