Acoustic signal processing device and method for detecting concentration of trace binary-component gas
A binary mixing and gas concentration technology, applied in measurement devices, processing detection response signals, scientific instruments, etc. low cost effect
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[0012] Such as figure 1 , the acoustic measurement device for trace binary mixed gas concentration is composed of a working head part 17, an analog circuit part 23, and a digital circuit part 28. These three parts are respectively shown in figure 1 The three dotted boxes in . Wherein, the working head part 17 includes two measuring chambers 2 and 16, the measuring chamber 2 contains a pure gas b, and the other measuring chamber 16 contains a binary mixed gas composed of trace gas a and pure gas b to be measured. An ultrasonic transmitting transducer 3 and an ultrasonic receiving transducer 13 are respectively provided at both ends of the inner cavity of the measuring cavity 2, and an ultrasonic transmitting transducer 18 and an ultrasonic receiving transducer are respectively arranged at both ends of the inner cavity of the measuring cavity 16. 14. The distance between the transmitting transducer 3 and the receiving transducer 13 is equal to the distance between the transmit...
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