Microwave ice detection device and system based on capacitively coupled split-ring resonator

A microwave ice detection system based on a capacitively coupled split-ring resonator, comprising a microwave ice detection device based on the capacitively coupled split-ring resonator, and further comprising:

• a temperature sensor, embedded on the microwave signal controller, having one end connected to a transformer of the microwave signal controller and an other end connected to a processor of the microwave signal controller, and configured to measure an external ambient temperature;
• a wave source, embedded in the microwave signal controller, connected to the transformer and the processor of the microwave signal controller, and configured to emit a microwave signal with constant or varying power;
• a transmission signal receiver, embedded in the microwave signal controller, having one end connected to the processor of the microwave signal controller and an other end connected to an input port of the microwave signal controller, and configured to introduce the measurement signal from the microwave resonant sensor;
• and
• a reflection signal receiver, embedded in the microwave signal controller, having one end connected to the processor of the microwave signal controller and an other end connected to the output port of the microwave signal controller, and configured to receive the microwave signal emitted by the wave source and input the microwave signal into the microwave resonant sensor via the output port;
• wherein, the microwave ice detection device based on the capacitively coupled split-ring resonator comprises:
• a microwave signal controller and a microwave resonant sensor in communication connection with the microwave signal controller;
• wherein, the microwave resonant sensor comprises a substrate arranged on a top surface of a metal shielding plate, wherein a copper foil is etched on a top surface of the substrate;
• wherein, the copper foil comprises a first split ring and a second split ring are arranged opposite to each other, and openings of the first split ring and the second split ring face with each other;
• a first microstrip line is provided on a side portion of the first split ring and extends to an edge of the substrate;
• a second microstrip line is provided on a side portion of the second split ring and extends to the edge of the substrate;
• in response to ice formation on a surface of the microwave resonant sensor, the microwave signal controller transmits a microwave signal with a variable frequency to the copper foil, and the first split ring and the second split ring transmit, to a mixture on the surface of the microwave resonant sensor, a microwave signal, which is reflected, transmitted and absorbed by the mixture to form a measurement signal;
• and
• the microwave signal controller is configured to acquire a resonance amplitude value and a resonance frequency of the measurement signal, after the measurement signal is transmitted to the microwave signal controller, and acquire ice thickness information according to the resonance amplitude value and the resonance frequency.