Embedded control system applied to LNG (liquefied natural gas) dispensers

Abstract

The invention discloses an embedded control system applied to LNG (liquefied natural gas) dispensers, which comprises a microprocessing single-chip microcomputer, an ARM(advanced RISC machine) embedded platform, a console, a main board power source, a power source isolation processing module and a power-off protection module. The ARM embedded platform is electrically connected with the microprocessing single-chip microcomputer, the console is subjected to TCP / IP (transmission control protocol / internet protocol) communication with the ARM embedded platform, the power source isolation processing module is electrically connected with the main board power source, and the power-off protection module is electrically connected with the power source isolation processing module. Besides, the microprocessing single-chip microcomputer is used for acquisition of underlying data of the system, process control and output display and used for submitting associated data to the ARM embedded platform. The ARM embedded platform is in communication connection with the microprocessing single-chip microcomputer, and associated data submitted by the microprocessing single-chip microcomputer are subjected to communication with the console through TCP / IP communication. The embedded control system is developed by combination of the microprocessing single-chip microcomputer and the ARM embedded platform, is more reliable and more reasonable and humanized in use, data exchange rate is increased greatly, and influence to other modules can be avoided since the power source is shunted and isolated.

Description

technical field [0001] The invention relates to a control system of an automobile gas filling machine, in particular to an embedded control system applied to a liquefied natural gas (LNG: Liquefied Natural Gas) filling machine. Background technique [0002] As a pure and clean energy, LNG is widely used, especially when used as a fuel for automobile engines, because of its high calorific value and low pollution, it is also an inevitable trend in the development of automobile fuel in the future. LNG filling machine is a kind of ultra-low temperature metering equipment for filling liquefied natural gas from LNG filling stations into LNG vehicles. The existing LNG filling machines on the market generally rely solely on the single-chip microcomputer to perform all the tasks of system control, data processing and storage, and communicate with the host computer through the single-chip microcomputer, and the system reliability is low. Furthermore, the existing LNG filling machine ...

AI Technical Summary

Problems solved by technology

Furthermore, the existing LNG filling machine communication modules are mostly applied based on the R485 bus structure and the CAN bus communication method, which communicates with the host computer through a single-chip microcomputer, and the speed requirements for communication data exchange are in some In special occasions, its true advantages cannot be exerted

Furthermore, the existing LNG filling machines do not have the support of ARM, all kinds of data can only be extracted automatically by the system without any right to choose, the use is not reasonable and humanized

In addition, since the LNG filling machine system has many functional modules and requires different power supplies, it is easy for various power supplies to interfere and affect each other. Once a power supply fails, it will affect the normal operation of other modules.

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