Wireless charging control circuit for unmanned aerial vehicle

Abstract

The invention discloses a wireless charging control circuit for an unmanned aerial vehicle. The circuit comprises a power acquisition circuit, a filter circuit, a digital-to-analog conversion circuitand a comparison operational amplifier circuit. The power acquisition circuit acquires a power signal of a radio frequency receiving module in wireless charging of the unmanned aerial vehicle. The filter circuit receives a rated power signal of a radio frequency transmitting module; the digital-to-analog conversion circuit is used for converting wireless charging power into a data signal; the datasignal is converted into an analog signal through the digital-to-analog circuit composed of an operational amplifier AR5, a resistor R14 and a variable resistor R13, and the analog signal is inputtedinto an inverting input end of an operational amplifier AR6; finally, the comparison operational amplifier circuit uses an operational amplifier AR3 to compare output signals of the power acquisitioncircuit and the filter circuit. The operational amplifier AR6 compares an output signal of the digital-to-analog conversion circuit with a mean value signal, triggers the signal emitter E1 to emit asignal into the power adjusting module through a level conversion circuit composed of a triode Q5 and a resistor R12, and triggers the power adjusting module to adjust resonance parameters of the radio frequency transmitting module.

Description

technical field [0001] The invention relates to the field of circuit technology, in particular to a wireless charging control circuit for an unmanned aerial vehicle. Background technique [0002] At present, the wireless charging system of the UAV generally includes a radio frequency transmission module, a radio frequency electric wave adjustment module, a radio frequency reception module; a power adjustment module; The law of magnetic induction receives electromagnetic waves, converts them into stable voltage signals, and charges the UAV. The power adjustment module adjusts the resonance parameters of the RF transmitter module in real time by detecting the power signal of the RF transmitter module, and realizes the function of adjusting the radio frequency of the RF transmitter module. However, the above The method is only to adjust the radio wave frequency of the radio frequency transmitter module through the power signal of the radio frequency transmitter module, and does...

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Problems solved by technology

[0002] At present, the wireless charging system of the UAV generally includes a radio frequency transmission module, a radio frequency electric wave adjustment module, a radio frequency reception module; a power adjustment module; The law of magnetic induction receives electromagnetic waves, converts them into stable voltage signals, and charges the UAV. The power adjustment module adjusts the resonance parameters of the RF transmitter module in real time by detecting the power signal of the RF transmitter module, and realizes the function of adjusting the radio frequency of the RF transmitter module. However, the above The method is only to adjust the radio wave frequency of the radio frequency transmitter module through the power signal of the radio frequency transmitter module, and does not take into account the influence of the radio frequency frequency on the efficiency of the radio frequency receiver module. When the efficiency of the radio frequency receiver module decreases, there are more radio waves of the radio frequency transmitter module. If the heat or static electricity transferred to the RF receiving module is not adjusted in time, it will seriously damage the receiving circuit of the drone's wireless charging

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