Design And Implementation Of Wrist Computing Terminal System

From the desktop PC, laptop notebooks, smart phones, wrist watches to the helmet intelligent computer, computer has changed dramatically in terms of usage, environment, external morphology, applications. It can be seen that the pursuit of computer with higher speed, more convenience and closer interaction between human and computer is getting urgent. As a wearable, hands free and close human-computer interaction, wrist computing terminal has an access to wearable, mobile and natural interaction. Focusing on the characteristics of the wrist computer and combining with the application of auxiliary engineering work, a prototype of a wrist computer system is designed in this paper, aiming to assist engineering and technical personnel with routine business equipment installation, upgrading, maintenance, dismantling, operation monitoring and troubleshooting operations. This design could effectively improve the efficiency of field operations, and then achieve the modern manufacturing enterprise equipment targeted maintenance.This article develops a new generation of wrist wearable computer terminal mainly based on ARM Crotex-A8 architecture. Then in-depth studying of the hardware platform structure, discussing the hardware circuit design, PCB design, Android system porting and driver development process of the key technologies in detail. Adopting All-chi A10 processor, AXP209 power chipset and Android 4.04 software platform, developing a prototype wrist computer, which could better meet the needs of the industrial field operations. This paper mainly includes the following four aspects.1) According to the system design requirements analysis, proposing the overall system design. Targeting in enterprise field operations assist application of wrist computers, this paper proposes an overall solution of system hardware platform, including the selection of the core platform, the hardware and system software architecture.2) Based on the overall system solution, carrying out specific hardware circuit design and PCB design. This paper uses Cadence’s OrCad software to design processor core module, power module, clock module, memory module, Bluetooth module, WIFI module, Zigbee module, the sensor module and the external interface circuit, then generates networks report files and sends into Mentor’s PADS software for PCB component placement, wiring design.3) According to the proposed system software architecture, developing system software, including compiling source Android system, cutting the Linux kernel, configuring system files, and custom module driver transplanting.4) Design post-test and evaluation: After completing the design, system boards, patch work, this paper builds a test platform to debug and verify functions of the mobile terminal hardware and software, and gives the debugging solutions and test results.Finally, through functional and non-functional assessment, validation of the prototype wrist computer designed in this paper, it turns out that the system has reached the target proposed before.