Constant-speed fertilization method based on variable frequency adjustment

Abstract

The invention relates to a constant-speed fertilization method based on frequency conversion regulation, which comprises the steps that a teletransmission pressure gauge generates different currents through different pressures and feeds current information back to an MCU so as to calculate the current pipeline pressure, and a flow sensor feeds a pulse value back to the MCU through counting pulses so as to calculate the current pipeline flow velocity. Various sensor values are fed back to the frequency converter by the MCU through 485 communication, and the frequency converter performs accurate and stable operation on a fertilization pump through PID control according to feedback signals, so that the fertilization rate is changed, and the effect of constant-speed fertilization is achieved. The constant-speed fertilization method has the advantages that the constant-speed fertilization based on variable-frequency adjustment accurately controls the use of a fertilizer through variable-frequency adjustment and PID control, and the constant-speed fertilization can be maintained according to the manually set amount, so that the purposes of controlling the fertilization speed to facilitate fertilizer absorption, controlling the fertilizer amount to facilitate saving and protecting the soil environment are achieved.

Description

technical field [0001] The invention relates to the field of agricultural fertilization, in particular to a constant-speed fertilization method based on frequency conversion regulation. Background technique [0002] As a large agricultural country, the growth rate of chemical fertilizer use far exceeds the growth rate of agricultural production in China. The overall level of fertilization is not high. In many areas, fertilizers cannot be used rationally and maximize the utilization rate of fertilizers. The cost of agricultural production has increased, but the benefits have decreased, resulting in The decline in the quality of agricultural products, serious waste, and pollution of the soil and ecological environment have laid hidden dangers for long-term farming. [0003] Manual fertilization is likely to cause uneven fertilizer spreading, less effective fertilizer, more waste, and higher labor costs; large-scale machine fertilization is greatly affected by terrain factors, ...

AI Technical Summary

Problems solved by technology

However, since most of the existing fertilizer applicators use jets to absorb fertilizer by the principle of negative pressure, and the negative pressure is greatly affected by the water flow rate and flow in the pipeline, it is difficult to accurately control the rate and amount of fertilizer absorption

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