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US5739534A Methods and apparatus for detecting fluids 失效
检测流体的方法和装置

Methods and apparatus for detecting fluids
摘要:
A system for detecting the presence of a fluid comprising: means for transmitting at least two infrared electromagnetic signals toward a fluid, each of the infrared electromagnetic signals have different wavelengths. It also includes means for sensing the reflection of each of the electromagnetic signals as well as means for creating a plurality of electrical signals indicating the intensity of the reflected signals. Finally, it includes means for determining the presence of said fluid by comparing the intensities of the plurality of electrical signals.
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