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This paper presents a novel design of the CNG dispenser electronic control system. The hardware design includes the ARM11 core-board and the expansion board, and the software design is based on the embedded Linux system with QT Embedded and SQLite. In addition to the general function as filling natural gas, the system has the GUI designed for touch input, the embedded database, and equipped with a RJ45 cable network interface, WiFi wireless network interface and RS485 interface etc.

CNG dispenser is a kind of equipment which can provide CNG fuel filling services for CNG vehicles. This paper presents a novel design of CNG dispenser control platform. The hardware design of the circuit board includes ARM11 core-board and extended board, and the software design is based on the Embedded Linux system, including the development of Linux drivers and applications. The new platform not only has better processing performance in basic functions like filling fuel, but also has excellent scalability such as network support and more humanized operation mode.

This paper studied the principle of Bluetooth image printing technique. Based on the ESC/POS command, the function of image printing via android Bluetooth application was established and a practicable APP software was developed. The APP can link to the micro printer via Bluetooth by using Bitmap class, Canvas class to convert the selected image, including transformation, zooming, saving and finally generate a printable binary string streams based on the pixel, and send it to micro printer to print it.

In this paper, we mainly explore how to design and implement the user interfaces of Electricity Operation Information System based on Android. The paper extends its process as the following four aspects---requirements analysis, UI design, interaction design and programmatic implementation. In response to user actions fluidly and friendly, we add modules to handle exceptions. In the end, we give a briefly test on the system UI to ensure it run smoothly and make less mistakes. There are limited studies focusing on the flow design of UI combined with programmatic implementation. The UI design and implementation methodology has good reference at the early stage of developing an application, especially on Android platforms.