The invention provides an electromagnetic flowmeter, a control method, a spraying system and an agricultural UAV. The electromagnetic flowmeter comprises an excitation circuit (1), a sensor (2), a converter (3) and a control circuit (4); the excitation circuit (1) generates an excitation signal; the sensor (2) generates an induced voltage signal when the conductive fluid flows under the excitationof the excitation signal; the converter (3) oversamples the induced voltage signal; the control circuit (4) determines the time when the over sampling start time arrives by monitoring the excitationsignal Reaching the control command causes the converter (3) to over sample the induced voltage signal in the over sampling time window. Through oversampling, the electromagnetic flowmeter can achievehigh-precision sampling and reduce the cost.
电磁流量计、控制方法、喷洒系统及农用无人飞行器。电磁流量计包括:励磁电路(1)、传感器(2)、转换器(3)及控制电路(4);励磁电路(1)产生励磁信号;传感器(2)在励磁信号的激励下,当导电流体流动时产生感应电压信号;转换器(3)对感应电压信号进行过采样;控制电路(4)通过监控励磁信号确定过采样开始时间到达时下达控制指令使转换器(3)在过采样时间窗口对感应电压信号进行过采样。该电磁流量计通过过采样能够实现高精度采样,降低成本。
Electromagnetic flowmeter, control method, spraying system and agricultural UAV
电磁流量计、控制方法、喷洒系统及农用无人飞行器
2021-01-01
Patent
Electronic Resource
Chinese
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