Radio frequency awakening circuit of wireless electromagnetic valve

Abstract

The invention provides a radio frequency awakening circuit of a wireless electromagnetic valve. The radio frequency awakening circuit comprises an SAW filtering and impedance matching circuit, an envelope detection and voltage doubling circuit, a signal amplification circuit, a signal selection and boosted circuit, a signal shaping circuit, a microprocessor, a wireless receiving and transmitting unit and a valve control unit. The SAW filtering and impedance matching circuit, the envelope detection and voltage doubling circuit, the signal amplification circuit, the signal selection and boosted circuit and the signal shaping circuit are sequentially connected with the microprocessor, a microcontroller is connected with the signal amplification circuit, and the wireless receiving and transmitting unit and the valve control unit are respectively connected with the microcontroller. The hardware awakening circuit is adopted, the defects of an existing wireless electromagnetic valve node awakening mechanism are overcome, energy management efficiency is improved, the service life of batteries is prolonged, and meanwhile the radio frequency awakening circuit is high in antijamming capacity, good in stability and wide in application range.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation automation, in particular to a radio frequency wake-up circuit for a wireless solenoid valve. Background technique [0002] At present, with the increasing shortage of fresh water resources in our country and the continuous rise of irrigation costs, automatic irrigation control systems with the advantages of water saving and high efficiency are widely used. However, with the improvement of irrigation scale and irrigation precision, the number of solenoid valves as the main execution equipment for irrigation control is also increasing rapidly, which will inevitably require laying a large number of cables, which not only brings difficulties to system installation, maintenance and expansion, but also affects In addition to field farming, in order to solve these problems, wireless solenoid valves are usually used to solve these problems. [0003] Due to the relatively long agricultura...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: a large number of cables are laid in the field, which makes the installation, maintenance and expansion of the system inconvenient, and at the same time affects the field farming problem; The problem of high cost of wake-up method

Images