Abstract
In order to meet the high precision and low cost of liquid level detection for bottled drinks in industrial production line, based on microwave transmission principle a liquid level detection method was designed on the basis of radar level meter. The rectangular microstrip antenna sent and received specific microwave signals. The signal was processed by the embedded ARM(Advanced RISC Machines) processor and digital signal processing method, and finally the data was transmitted. It was verified by experiments that the microwave penetration method can be used for liquid level detection, and the detection accuracy can reach ±1mm. Due to the use of microwave for measurement, the system has high stability and can be applied to the liquid level detection of bottled drinks on the production line.
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