Self-feedback control method of gas dispenser

Abstract

The invention relates to the field of control of a gas dispenser and particularly relates to a self-feedback control method of a gas dispenser. The self-feedback control method comprises the following steps of: initializing a system and calculating an instantaneous pressure changing rate; when the instantaneous pressure changing rate is greater than a pre-set value, maintaining the gas leakage of the inner part of a pipeline of the gas dispenser; if the inner part of the pipeline of the gas dispenser does not leak gas, setting a gas dispensing amount or a gas dispensing volume and a charging pressure rated value; sampling a flow of a mass flow meter and a pressure value of a pressure-limited sensing device in real time; calculating a predicated charging pressure value of a terminal by an electric controller through using a predicated charging pressure algorithm; comparing the predicated charging pressure value with a pre-set charging pressure rated value; if the predicated charging pressure value is equal to the pre-set charging pressure rated value, finishing the gas dispensing; reading a pressure value of the terminal by the pressure-limited sensing device when the gas dispensing is finished and comparing the pressure value with the pre-set charging pressure rated value; and revising a weighted value of an output layer of the predicated charging pressure algorithm according to the error of the values and the flow when the gas dispensing is stopped. According to the self-feedback control method disclosed by the invention, the adaptive capacity of the gas dispenser to a pipeline environment is improved and the self-feedback control of the gas dispenser is realized.

Description

technical field [0001] The invention relates to the field of gas dispenser control, in particular to a self-feedback control method of the gas dispenser. Background technique [0002] In recent years, building low-carbon enterprises, developing low-carbon economy, and promoting low-carbon life have become global hot topics. Energy conservation includes low-carbon emissions, high efficiency, energy conservation, and environmental protection. The smog weather alerts the whole society to pay more attention to environmental protection issues. As a one-time clean energy, natural gas will be a powerful practitioner of the country's leading energy conservation and emission reduction policies under the environment of improved energy conservation awareness and energy efficiency standards. It is predicted that by 2035, natural gas will become the world's largest energy source. With the further popularization and use of natural gas, compressed natural gas vehicles will be further dev...

AI Technical Summary

Problems solved by technology

However, there are still many deficiencies in the control method of the gas filling machine: the ability to automatically adapt to the environment for the gas filling machine is insufficient, and the self-correcting judgment ability for fault errors is insufficient

The specific problems are as follows: (1) The switching of the three-wire low-pressure solenoid valve, medium-pressure solenoid valve, and high-pressure solenoid valve of the gas dispenser is based on fixed parameters, and it is impossible to make an effective judgment on the pressure of the gas source, and the pressure of the gas source is adjusted according to the pressure of the gas source. Make the best judgment on the flow rate of the existing valve replacement, implement the most effective gas filling for automobile steel cylinders, and make optimal use of the pressure of the gas source

(2) The gas filling machine needs to realize automatic control shutdown (full self-stop) when filling the automobile steel cylinder to the rated pressure, but it is often based on the existing empirical parameter equations, lacking the internal mechanical structure pipeline of the gas filling machine Environmental adaptability. When the internal structure is adjusted, it needs to be manually adjusted again. It lacks the ability to adapt to different gas filling stations. After-sales personnel need to adjust it according to the site conditions during commissioning.

(3) The judgment and error correction ability of the gas filling machine is insufficient for mechanical failure (ice blockage, pipeline blockage), and it is impossible to judge the problem of the gas filling machine according to the abnormality in the gas filling process, and suggest the customer to maintain the gas filling machine

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