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Electromagnetic position detector employing fast fourier transform analysis
Electromagnetic position detector employing fast fourier transform analysis
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机译:采用快速傅立叶变换分析的电磁位置检测器
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摘要
A high frequency signal is beamed into a bunker and a reflected signal from the top of the contents in the bunker is detected and fed into electronic circuitry. This circuitry obtains a beat signal dependent in frequency on the height of material in the bunker and the signal is subjected to division in a processing circuit and subsequent treatment as a Fast Fourier transform. A store gathers all divided and transformed segments of the signal to provide a spectrum from which the level of the bunker can be obtained as a read out.
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