Air measuring device with rotation speed automatic control function and air measuring method
A technology of gas measurement and speed, applied in measuring devices, material analysis through optical means, instruments, etc., can solve the problems of affecting the speed of the motor, the speed of the motor is not completely the same, and there is no monitoring and control of the speed of the motor, so as to improve the stability and accuracy, improve accuracy, and ensure stability
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[0032] The principle of measuring gas concentration by the device of the present invention is: when infrared light passes through the gas to be measured, infrared light near a certain wavelength is absorbed, and the absorption is related to the concentration of the gas to be measured, that is, the infrared light that reaches the wavelength attachment of the detector The energy varies with the concentration of the gas being measured. First, the infrared light is modulated into a light pulse signal by the chopper, and then the light energy of the infrared light of this wavelength after passing through the measured gas is measured by the infrared sensor to calculate the real-time concentration of the measured gas. Since infrared sensors have a certain response bandwidth, this bandwidth is relatively low. In medical gas monitoring, in order to measure the respiratory waveform at high respiratory rate and reflect the details of the waveform, the frequency of the modulated light pulse s...
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