A method and system for period verification of a gas dilution device

By detecting the concentration readings of the verification gas and dilution gas in a gas dilution device, calculating the dilution error, and correcting the maximum permissible error, the problem of neglecting the chemical characteristics of the dilution process and the high cost in the prior art is solved, realizing an economical and feasible way to transfer gas concentration values ​​and a simple and easy-to-use verification method.

CN122409956APending Publication Date: 2026-07-17NEW COSMOS ELECTRIC (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202610490824.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-14
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing methods for verifying gas dilution devices ignore the influence of the chemical properties of the gas during the dilution process, are costly and complex to operate, and are difficult to achieve economical and feasible accurate verification.

Method used

By detecting the verification gas and dilution gas of the gas dilution device to be verified, setting the output gas concentration to be consistent, using the gas detection unit to obtain the concentration reading, calculating the dilution error, and combining the expanded uncertainty to correct the maximum permissible error, the verification result is automatically determined.

Benefits of technology

It enables a high degree of replication of the dilution process under economically feasible conditions, ensuring the accuracy and reliability of gas concentration value transmission, simplifying the verification process, and improving the universality and reliability of verification.

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Abstract

The application provides a period verification method and system for a gas dilution device, and belongs to the technical field of period verification. The method comprises the following steps: detecting a first gas concentration indication value of verification gas; introducing component gas and dilution gas into a gas dilution device to be verified, setting the output gas concentration to be consistent with the concentration of the verification gas, and setting the components of the component gas and the verification gas to be the same; detecting the output gas of the gas dilution device to be verified to obtain a second gas concentration indication value; determining the dilution error of the gas dilution device to be verified according to the first and second gas concentration indication values; correcting the maximum allowable error of the gas dilution device to be verified according to the gas dilution process and the expanded uncertainty of the introduction of the verification gas; and outputting a period verification result according to the corrected maximum allowable error and the dilution error. The method has the beneficial effect that the actual dilution process of the gas dilution device can be highly restored, reliable period verification can be realized under the premise of economic feasibility, and the accuracy and reliability of the gas concentration value transmission are ensured.
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