基于BLE智能硬件低功耗技术的研究

发布时间：2018-03-12 09:49

本文选题：低功耗　切入点：BLE　出处：《深圳大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来物联网技术迅猛发展,其应用领域不断拓宽,给人们的生活各方面带来了巨大的便利。蓝牙技术作为物联网传输层的重要组成部分,它通过微微网的方式为短距离的无线设备提供低成本、低功耗的无线接口,实现设备之间的自动同步、数据交换以及资源共享等。由于物联网无线设备多以手持式、穿戴式为主,且多为非持续性供电的应用场景,设备能够使用的电量极其有限。因此,如何保证物联网终端设备能够长时间运行成为物联网传输领域的热点问题之一。由于当前物联网无线设备体积小、功能丰富、应用环境变化迅速等特点,尽管在硬件上采用降低电子元件本身功耗的策略,软件上采用超时控制算法,但是仍然不足以使得设备能够长时间运行。此外,近三十年来电池的容量仅增加了2~4倍,所以仅靠增加电池电量的方式也不足以解决此问题。降低无线设备运行过程中自身所消耗的电量,其作用明显且能够降低设备成本,因此此方法越来越受到研究者的关注。本文根据物联网蓝牙无线技术的特点,对传统物联网无线设备在运行的各个阶段进行优化和改进,在不减少设备需求和额外增加成本的情况下,达到降低设备功耗的目的。本文主要的研究内容如下:(1)介绍了当前物联网中蓝牙设备的发展现状,针对当前蓝牙设备运行时间不长的问题,详细说明了降低功耗的紧迫性与必要性。(2)阐述了当前低功耗技术的发展与应用情况。(3)介绍并分析了蓝牙通信过程中的各个状态,研究了蓝牙主设备和蓝牙从设备在连接前、连接中、连接后不同通信状态下的功耗计算过程,并给出了相关降低功耗的建议。(4)分析了应用开发需求,对低功耗蓝牙体温计的软、硬件进行了设计开发,并实现了蓝牙设备之间的正常通信。(5)根据对蓝牙通信过程的能耗分析,结合系统软硬件,对低功耗蓝牙体温计的功能和功耗部分进行了测试。实验表明根据分析的结论能够达到了降低能耗的目的。本论文的技术创新点如下:(1)对蓝牙主从设备在通信前、通信中以及通信后各个过程进行了分析,给出蓝牙设备在通信过程中能量计算方式。(2)分析出蓝牙通信过程中对能量影响较大的通信参数,并给出相关的降低功耗的建议。
[Abstract]:In recent years, with the rapid development of Internet of things technology, its application field has been widened, which brings great convenience to people in all aspects of life. Bluetooth technology as an important part of the Internet of things transport layer, It provides low cost, low power wireless interface for short distance wireless devices by piconet, and realizes automatic synchronization, data exchange and resource sharing between devices. Wearable, mostly non-sustainable power-powered applications in which devices can use extremely limited power, therefore, How to ensure that the terminal equipment of the Internet of things can run for a long time has become one of the hot issues in the field of Internet of things transmission. Although the hardware strategy is to reduce the power consumption of the electronic components themselves and the time-out control algorithm is used in the software, it is still not enough to make the device run for a long time. In addition, the capacity of the battery has increased only 2 times in the last 30 years. Therefore, increasing battery power alone is not enough to solve this problem. Reducing the amount of electricity consumed by the wireless device itself during the operation of the wireless device has a significant effect and can reduce the cost of the device. Therefore, this method has attracted more and more attention of researchers. According to the characteristics of Bluetooth wireless technology, this paper optimizes and improves the traditional wireless devices of Internet of things in various stages of operation. The purpose of reducing device power consumption is achieved without reducing equipment demand and additional cost. The main research contents of this paper are as follows: 1) the current development status of Bluetooth devices in the Internet of things is introduced. Aiming at the short running time of Bluetooth equipment, the urgency and necessity of reducing power consumption are explained in detail. This paper studies the power calculation process of Bluetooth main device and Bluetooth slave device under different communication states before, during and after connection, and gives some suggestions for reducing power consumption. Finally, the application development requirements are analyzed, and the software of low-power Bluetooth thermometer is analyzed. The hardware is designed and developed, and the normal communication between Bluetooth devices is realized. (5) according to the energy consumption analysis of Bluetooth communication process, combined with the software and hardware of the system, The function and power consumption of low-power Bluetooth thermometer are tested. The experiment shows that the purpose of reducing energy consumption can be achieved according to the conclusion of the analysis. The technological innovation of this paper is as follows: 1) the master-slave equipment of Bluetooth is communicated before communication. During and after the communication each process is analyzed, and the energy calculation method of Bluetooth equipment in the communication process is given.) the communication parameters which have great influence on energy in the process of Bluetooth communication are analyzed, and the relevant suggestions for reducing power consumption are given.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925

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