Intelligent digital fertilizer-mixing acid base-adjusting liquid level-controlling device

Abstract

The invention belongs to the agricultural irrigation technology field, to be specific, relates to an intelligent digital fertilizer-mixing acid base-adjusting liquid level-controlling device. The intelligent digital fertilizer-mixing acid base-adjusting liquid level-controlling device comprises a PH sensor, an EC sensor, a liquid level sensor, a frequency conversion adjusting diaphragm pump, a flow meter, and a PWM power supply. The liquid level sensor is provided with a switch. According to a diaphragm pump flow characteristic curve and an EC (electric conductivity) detection value, diaphragm pump frequency conversion signal duty ratios are calculated by adopting fast two-dividing matching way, and flow meter measuring values are used as the feedback signals of the flow speed adjustment of the diaphragm pump, and the flow speeds of four channels of fertilizers are adjusted strictly according to the duty ratios of the four channels of fertilizers, and fertilizer preparation EC values are quickly matched with a preset EC concentration range. According to the diaphragm pump flow characteristic curve and the PH sensor detection values, the diaphragm pump frequency conversion signal duty ratios are calculated by adopting the fast tracking and matching way, and then the flow meter measurement values are used as the negative feedback signals of the diaphragm pump adjustment, and then the fertilizer PH values can be quickly matched with a preset PH value range.

Description

technical field [0001] The invention belongs to the field of agricultural irrigation, and in particular relates to an intelligent digital mixed fertilizer device for adjusting acid and alkali and controlling liquid level. Background technique [0002] The goal of automated water and fertilizer irrigation is to precisely distribute fertilizers, quickly mix fertilizers, and improve water and fertilizer use efficiency, thereby increasing crop yields, improving crop quality, and reducing environmental pollution. The mixed fertilizer adjustment module has played a vital role in the development of automatic water and fertilizer irrigation equipment, improving water and fertilizer utilization efficiency and establishing modern ecological agriculture. [0003] The automatic fertilizer mixing methods can be divided into non-pump fertilizer mixing and pump fertilizer mixing. The non-pump type mainly uses the pressure difference to mix the fertilizer into the water, such as height pre...

AI Technical Summary

Problems solved by technology

The centrifugal pump type fertilizer mixing device is a modern and cheap fertilizer mixing device, but there is a blind area in the fertilizer speed adjustment in the PWM adjustment, which does not meet the requirements of the current automatic mixing fertilizer adjustment range

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