Novel prepayment type gas meter and target gas measurement method thereof

Abstract

The invention provides a novel prepayment type gas meter and a target gas measurement method thereof. The novel prepayment type gas meter comprises a shell, a target gas measurement management circuit, a prepayment management circuit and a gas inlet tube, wherein the prepayment management circuit comprises a microprocessor circuit I and a measurement signal sampling circuit, the target gas measurement management circuit comprises a microprocessor circuit II, a target gas detection sensor module and a controllable switch circuit, and the controllable switch circuit is connected between the microprocessor circuit I and the measurement signal sampling circuit. According to the method, whether the target gas concentration signal reaches the threshold value or not is judged by the microprocessor circuit II, the controllable switch circuit is controlled to be connected and measurement signals are read by the microprocessor circuit I if the target gas concentration signal reaches the threshold value, otherwise, the controllable switch circuit is turned off, reading of the microprocessor circuit I is stopped, and judgment is performed continuously; and the measurement signals are converted by the microprocessor circuit I, and the measured value is displayed. Accurate measurement can be realized by the gas meter, and the gas meter can be transformed easily. The method is simple and practical, and can be easily realized.

Description

technical field [0001] The invention relates to a gas meter, in particular to a novel prepaid gas meter and a method for measuring target gas. Background technique [0002] As a kind of gas metering equipment, gas meters are widely used in production and life; existing gas meters can be divided into mechanical membrane gas meters and electronic membrane gas meters, which generally only measure the total volume of gas flowing through the gas meter. Metering does not detect and judge the target gas flowing through the gas meter. Therefore, there will be some disadvantages in the process of use: for example, in order to speed up the construction and popularization of biogas projects, China has adopted the policy of using biogas to obtain subsidies. However, during the subsidy process, some users used blowers to pretend to be biogas to obtain financial subsidies. This phenomenon not only violated the original intention of the national policy, but also harmed the interests of bio...

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Problems solved by technology

[0002] As a kind of gas metering equipment, gas meters are widely used in production and life; existing gas meters can be divided into mechanical membrane gas meters and electronic membrane gas meters, which generally only measure the total volume of gas flowing through the gas meter. Metering does not detect and judge the target gas flowing through the gas meter. Therefore, there will be some disadvantages in the process of use: for example, in order to speed up the construction and popularization of biogas projects, my country has adopted the policy of using biogas to obtain subsidies. However, during the subsidy process, some users used blowers to pretend to be biogas to obtain financial subsidies. This phenomenon not only violated the original intention of the national policy, but also harmed the interests of biogas users; In order to seek improper benefits, there has been a phenomenon of using low-quality gas to shoddy and harm uninformed users

[0003] In view of the above situation, since the existing gas meter does not have the function of detecting the target gas flowing into the gas meter, it is impossible to discriminate the true and false target gas and scientifically measure the gas flowing into the gas meter

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