Dynamic calibrator
A dynamic calibration and delivery pipeline technology, which is applied to instruments, scientific instruments, standard gas analyzers, etc., can solve problems such as the inability to realize closed-loop control of flow rate, and achieve the effect of improving accuracy
Pending Publication Date: 2021-10-12
苏州天一信德环保科技有限公司
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Problems solved by technology
[0004] For this reason, the technical problem to be solved by the present invention is to overcome the defect that the dynamic calibrator in the prior art cannot achieve the closed-loop control of the flow rate, resulting in unsatisfactory response speed and concentration detection accuracy.
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[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.
[0027] refer to Figure 1 to Figure 5 As shown, the embodiment of the present invention provides a dynamic calibrator, the specific structure of which includes a gas circuit mixing unit and a dynamic calibrating unit.
[0028] The gas path mixing unit includes zero gas delivery pipeline, standard gas delivery pipeline, first mixing chamber 3, second mixing chamber 4, ozone generation delivery pipeline and ozone detection assembly, and the ozone generation delivery pipeline is connected to the zero gas delivery pipeline , the gas outlet end of the zero gas delivery pipeline and the gas outlet end of the standard gas delivery pipeline are connected to the inlet end of the first mixing ch...
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The invention relates to a dynamic calibrator. The dynamic calibrator is characterized in that the dynamic calibrator comprises a gas path mixing unit and a dynamic calibration unit; the gas path mixing unit comprises a zero gas conveying pipeline, a standard gas conveying pipeline, a first mixing chamber, a second mixing chamber, an ozone generation conveying pipeline and an ozone detection assembly; the dynamic calibration unit comprises a central processing unit, a first mass flow controller and a second mass flow controller, and the first mass flow controller and the second mass flow controller are both connected to the central processing unit. The dynamic calibrator provided by the invention comprises the gas path mixing unit and the dynamic calibration unit, and the dynamic calibration unit comprises the central processing unit, as well as the first mass flow controller and the second mass flow controller which are connected with the central processing unit. The central processing unit is used for tracking the flow of the first mass flow controller and the second mass flow controller in real time, so that closed-loop control of the flow is realized, and the response speed and the concentration detection accuracy are greatly improved.
Description
technical field [0001] The invention relates to the technical field of gas concentration detection, in particular to a dynamic calibrator. Background technique [0002] The dynamic calibrator is also called a gas distribution instrument. Generally, nitrogen or zero air is mixed with a certain concentration of standard gas, and then the gas with the desired concentration is generated. Because ozone is very active, cylinder gas cannot be used for long-term storage. Therefore, in air quality monitoring, it is necessary to use a dynamic calibrator to generate ozone in real time, which places high demands on the gas circuit inside the dynamic calibrator. [0003] As a gas distribution device, the dynamic calibrator provides a standard concentration for the analytical instrument to calibrate the measured value of the analytical instrument. Therefore, the flow error of the gas distribution of the dynamic calibrator needs to be well calibrated by a higher-level instrument. The gas...
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IPC IPC(8): B01F15/04B01F3/02G01N33/00B01F23/10
CPCG01N33/0006
Inventor 王淑建严高明
Owner 苏州天一信德环保科技有限公司