Smart card gas meter

Abstract

The invention discloses a smart card gas meter. The gas supply metering function is achieved by a gas meter, and the charging management function is achieved by a circuit. A valve capable of being automatically switched off without power is installed in the mechanical gas meter, and the code type smart card circuit is superposed on the mechanical gas meter. In the gas supply process, the mechanical switch charging state per metered gas supply unit is mechanically detected through the gas meter, instantaneous electrification is carried out, and after charging is confirmed through smart card interactive communication and data exchange, a new round of gas supply is carried out; when conditions of a new round of gas supply are not met, after a charged quantity of gas supply is completed, the valve in the gas meter is automatically switched off without a power supply. Uniform metering readings conforming to the purpose of legislation of the metrological law are available for management, control and charging; tiered gas pricing can be conveniently carried out; closed-loop payment exchange between electronic currency and physical goods is achieved; the serious illegal status that the entire industry violates the national metrological law on a large scale in mechanical / electronic dual metering, dual control and dual display brought by a traditional non-electricity measurement technology to existing smart card gas meters is thoroughly eliminated.

Description

technical field [0001] The present invention relates to a flow measurement device; more specifically, it relates to a smart card for charging management, the circuit in the device is only charged instantaneously during each round of gas supply, and performs real-time protocol encrypted communication and charging management, and the device is opened The valve installed in the device; the smart card gas meter that can automatically shut off the valve in the device without electricity when the gas supply condition is not met. Background technique [0002] The known public smart card gas meter at the present stage is still in the primary stage of research and development trial and use though it is being popularized and applied on a large scale. One is that smart card technology, as an information technology, is improving its security and practical application scope by leaps and bounds; the other is that the implementation of information management for decentralized physical term...

AI Technical Summary

Problems solved by technology

Therefore, there are major structural defects: there are two kinds of measurement data and two kinds of measurement results of mechanical measurement and electronic measurement at the same time! Such measuring instruments are contrary to the legislative purpose of "unified measurement standards" of the Metrology Law, and are illegal measuring instruments! That is to say, the daily gas supply, gas consumption, and payment management are all electronic data, and the measurement, control and display results are mechanical data, while the electronic data is only the electronic pulse alteration in the mechanical detection process; one gas consumption data is two Display, there may be two different metering readings: the fee payment is based on the electronic pulse modification of the mechanical metering reading, and the gas used to control the gas supply is also an electronic pulse modification; and if the electronic data is inconsistent with the mechanical reading in actual management , the air supply pipe and gas department stipulates that when there is inconsistency, the mechanical display data shall prevail, and the electronic data shall be used as reference data only! This kind of industrial and large-scale violation of the fundamental legislative purpose of "unified measurement standards" in the National Metrology Law cannot last for a long time and last forever! 2. The existing smart card gas meter must be powered continuously for 24 hours. Even if it is only a very small power supply in the dormant state of the circuit, the electronic metering pulse must be powered. The management of the gas meter will fail and fail! However, at present, even the best batteries in the world have a certain failure rate of sudden death within the normal service life; If the capacitor cannot supply current, it will inevitably lead to the loss of control of the smart gas meter! At present, large-capacity farad capacitors are installed on many smart gas meter circuits. This is the de facto dual power supply, which reduces the occurrence of out-of-control situations, but does not fundamentally solve the problem. Instead, a new gas supply has appeared. Fault phenomena, electronic gas meters often cause gas supply interruption due to power supply problems, and replacing batteries and disassembling gas meters is a labor-intensive and time-consuming process for users and increases management costs. Battery replacement has become a highly professional daily work for electronic gas meters , affecting the gas supply and consumption, increasing the management cost and workload of the gas supply pipeline company

3. Since many gas meters are closed at the user for a long time, the external credit seal of the gas meter is easily damaged, especially the electronic gas meter has a circuit inside. The external credit seal of the gas meter is a big problem, and there are management blind spots

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