Gas flow determination system and method based on circuit on-off states
A technology of gas flow and measurement system, which is applied in the field of microbial fermentation, can solve problems such as high light environment requirements, and achieve the effect of simple device structure and accurate gas flow
Active Publication Date: 2018-01-26
SHENYANG AGRI UNIV
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[0005]
The above two patents "Determination of Microbial Respiration Rate Based on Bubble Counting" and "Automatic Bubble Counting System Based on Photoelectric Technology" are both based on the photoelectric principle for measurement, and have high requirements for the light environment
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[0038] Such as Figure 1-Figure 3 Shown, the present invention is based on the gas flow measuring method of circuit on-off as follows:
[0039] Taking voltage collection as an example, the gas flow is passed into the buffer bottle 13 from the air inlet pipe 11, and enters the bubble tube 21 through the gas connecting pipe 14 to generate bubbles 23. When the bubbles 23 do not pass through the upper part of the inner tube 22, the probe electrode (Negative electrode) 26 is not in contact with the solution, and the measuring circuit is in an open circuit state (such as figure 2 ), at this time the voltage of the measuring circuit is small or zero, so the voltage collected by the signal collector 3 is relatively low. When the bubble 23 passed through the cylindrical thin tube part on the top of the inner tube 22, the bubble 23 became an air column to push the solution in the upper cylindrical thin tube part of the inner tube 22 to spray upwards, forming a liquid bubble at the liq...
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The invention relates to the microbial fermentation field, particularly relates to a gas flow determination system and method based on circuit on-off states and can be used for determining the gas flow velocity and the flow. The system comprises a buffer device, a bubble determination sensor and a signal acquisition device. When gas is injected into the bubble determination sensor filled with liquid, bubbles are generated in a bubble pipe and rise in the bubble pipe to push the liquid to flow upwards to form a liquid column, and an upper portion of a fine pipe is provided with a measurement circuit; as the liquid is conductive, the circuit is in an off state when no bubbles are generated; when the bubbles are generated, the liquid column is sprayed out upwards, the circuit is in an on state; the gas flow is acquired through multiplying the bubble quantity by the volume of each bubble, and the gas flow velocity is acquired through dividing the gas flow by the time; a single-chip microcomputer timer is employed to calculate the time from start to ending, namely the measurement-needing gas flowing time. The system is advantaged in that the gas flow can be accurately measured based onthe on and off states of the circuit, the device is simple, and excellent conditions are provided for analyzing the microbial fermentation process.
Description
technical field [0001] The invention relates to the field of microbial fermentation, in particular to a gas flow measurement system and method based on circuit on-off, which can be used to measure gas flow velocity and flow. Background technique [0002] When studying microbial fuel cells, biogas fermentation and other processes, microbial fermentation produces gases such as carbon dioxide and methane. The amount and rate of gas generation can reflect the activity of microorganisms and the progress of the fermentation process, which is an important parameter for research. Gas production can be detected by drainage and gas collection method, gas flow meter, etc. Gas flow meter is usually used in the occasion of large gas flow, and it is difficult to measure trace gas. The water drainage gas collection method needs to manually measure the gas production and record the data, which is inconvenient to operate. In particular, the scale of the reaction device in the laboratory is ...
Claims
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Login to View More IPC IPC(8): G01D21/02
CPCY02E30/30
Inventor 李金洋刘庆玉邵志江杨政福刘志北谷士艳李轶张敏赵玲金虹葛竟峰吕坤郑颖
Owner SHENYANG AGRI UNIV