基于NRF51822的可穿戴心率監(jiān)測及防丟系統(tǒng)設計
發(fā)布時間：2019-03-22 06:04
【摘要】：近年來,隨著智能可穿戴技術的快速發(fā)展和日益完善,越來越多的智能可穿戴產品出現在我們的生活中。而且這些智能可穿戴產品涉及的領域也從最開始的娛樂信息領域拓展到了運動生活和醫(yī)療保健等領域。智能可穿戴產品的出現,使人們的生活變得日益智能化�；谥悄芸纱┐骷夹g的背景,結合近幾年常有兒童被遺忘在汽車里而發(fā)生危險的現實情況,本文將設計一款專門用于預防此類事故發(fā)生的兒童可穿戴心率監(jiān)測及防丟系統(tǒng)。這款系統(tǒng)與市面上已經出現的其他兒童防丟系統(tǒng)的不同之處在于,市面上的兒童防丟產品大都僅僅是基于防止兒童丟失的目的設計的。一些簡易的防丟器只是通過距離設置來實現簡單的防丟功能,這種防丟產品一般精確度不高。而一些高端的兒童防丟產品則加入了GPS定位、GSM位置查詢和GPRS通信等技術來對兒童的位置信息進行追蹤。這類產品雖然功能強大,但費用較高而且對于預防兒童被遺忘在汽車里而發(fā)生危險這類事件來說有點大材小用。所以本文針對上述問題設計了這款基于NRF51822可穿戴的心率監(jiān)測及防丟系統(tǒng)。本系統(tǒng)的創(chuàng)新之處在于,除了具有丟失提醒的功能外還添加了心率監(jiān)測功能,只要在通信連接范圍內,在孩子被鎖在車里的情況下,家長也可以通過心率監(jiān)測來查看孩子的狀態(tài),避免意外的發(fā)生。本系統(tǒng)的設計將對預防兒童被遺忘在車里而發(fā)生危險這類事故的發(fā)生具有重要意義。本系統(tǒng)的設計是基于一款藍牙4.0BLE芯片NRF51822,結合心率傳感器,心率算法及RSSI測距技術,利用BLE無線通信技術與安卓智能手機進行通信的一款可穿戴心率監(jiān)測及防丟系統(tǒng)。該系統(tǒng)整體上分為了兩個個部分,一部分是穿戴在兒童身上的智能可穿戴產品,本文定義為從機,這也是本文將重點研究的部分。二是家長隨身攜帶的智能安卓手機,本文定義為主機。其中,從機和主機之間的通信方式,本文將采用藍牙4.0BLE技術完成主從機的數據交互。該系統(tǒng)預期實現的整體功能為,當從機與主機通過BLE技術連接時,主機即可對從機的佩戴者進行心率監(jiān)測,當佩戴者的心率超出主機中的預設心率范圍時,主機就會報警進行提示,從而達到對兒童的心率監(jiān)測的目的。防丟功能則是基于RSSI測距原理的基礎上實現的,當從機與主機的距離超出主機的預設距離范圍時,主機會發(fā)出報警信號來提醒主機攜帶者,從機已丟失,從而達到防遺忘的目的。從機和主機之間的通信方式是本系統(tǒng)設計的重要環(huán)節(jié)之一,所以本文將在第2章對藍牙4.0BLE技術進行詳細介紹,包括藍牙的發(fā)展歷程,藍牙4.0BLE的技術特點、協(xié)議棧特點及網絡拓撲結構的特點。除此之外,作為系統(tǒng)的兩個重要功能模塊,即心率監(jiān)測模塊和防丟模塊。本文也將在第二章對它們所涉及的技術進行介紹,如:心率監(jiān)測模塊用到的心率采集技術和防丟模塊涉及到的測距技術。在對從機的硬件設計上,本文將采用模塊化設計,即把從機在硬件結構上細分成各個模塊進行設計。從機從總體上包括三大模塊,即控制器模塊、心率采集模塊和電源模塊。其中對控制器模塊的設計,是基于主控芯片NRF51822進行一系列的外圍配置電路設計,如:時鐘電路設計、復位電路設計天線匹配電路的設計。心率采集模塊主要是通過傳感器完成對心率信號的采集和處理。而在電源模塊的設計上,本文不僅要對供電模塊進行設計,還將增加充電模塊和電池電量檢測模塊的硬件電路設計。本文對從機的軟件設計主要是對主控芯片NRF51822進行程序設計。本文將從通信鏈路的建立,心率監(jiān)測功能的實現,RSSI防丟功能的實現和電池電量檢測功能的實現這四方面進行設計。在這部分中,也將對涉及到的心率算法和RSSI測距原理進行詳細介紹。最后,本文將通過兩種方法對系統(tǒng)功能進行測試。一是通過抓取藍牙廣播通道和數據通道的數據包,對數據進行分析來判斷系統(tǒng)功能。二是通過對應的APP對系統(tǒng)進行功能驗證。
[Abstract]:In recent years, with the rapid development and perfection of the intelligent wearable technology, more and more intelligent wearable products appear in our lives. And the field of the intelligent wearable products also extends from the most starting entertainment information field to the fields of sports and health care and the like. The appearance of intelligent wearable products makes people's life more intelligent. Based on the background of the intelligent wearable technology, and in combination with the reality that children have been forgotten in the car in recent years, this paper will design a wearable heart rate monitoring and anti-loss system for children with such accidents. The system differs from other children's anti-loss systems already in the market in that most of the child-proof products on the market are designed based on the purpose of preventing the loss of children. Some simple anti-drop devices are only designed to achieve a simple anti-loss function by distance setting, which is generally not high in precision. And some high-end child anti-dropping products are added with GPS positioning, GSM position inquiry and GPRS communication technology to track the position information of the children. This kind of product, though powerful, has a high cost and is a little small for preventing children from being forgotten in the car. Therefore, this paper designs a wearable heart rate monitoring and anti-loss system based on NRF51822 for the above-mentioned problems. The innovation of the system is that the heart rate monitoring function is added in addition to the function with the missing reminding, so long as the parent can see the state of the child through the heart rate monitoring in the condition that the child is locked in the car in the communication connection range, and the accident can be avoided. The design of the system will be of great significance to the occurrence of such accidents that prevent children from being left in the car. The design of the system is based on a Bluetooth 4.0 BLE chip NRF51822, combined with a heart rate sensor, a heart rate algorithm and an RSSI ranging technology, and a wearable heart rate monitoring and anti-loss system for communicating with the Android smart phone by using the BLE wireless communication technology. The system is divided into two parts, and one part is an intelligent wearable product worn on a child. This article is defined as a slave, which is part of the research. The second is the intelligent Android mobile phone carried by the parents, which is defined as the host. In this paper, the communication mode between the slave and the host is completed, and the data interaction of the master-slave machine will be completed with the Bluetooth 4.0 BLE technique. The overall function of the system is that when the slave and the host are connected through the BLE technology, the host can monitor the heart rate of the wearer of the slave machine, and when the heart rate of the wearer exceeds the preset heart rate range in the host, the host can alarm to prompt, So as to achieve the purpose of monitoring the heart rate of the child. The anti-loss function is realized on the basis of the principle of RSSI ranging, and when the distance between the slave and the host exceeds the preset distance range of the host, the main opportunity issues an alarm signal to remind the host carrier that the slave is lost, thereby achieving the purpose of preventing forgetting. The communication mode between the slave and the host is one of the important links in the design of the system, so this paper will introduce the Bluetooth 4.0 technology in Chapter 2, including the development of Bluetooth, the technical features of Bluetooth 4.0 BLE, the characteristics of the protocol stack and the network topology. In addition, as two important functional modules of the system, the heart rate monitoring module and the anti-dropping module. The techniques involved in the second chapter are also described in the second chapter, such as the heart rate acquisition technique used by the heart rate monitoring module and the ranging technology involved in the anti-drop module. In the hardware design of the slave, this paper will adopt the modular design, that is, the slave machine is subdivided into various modules in the hardware structure. The slave system consists of three modules, namely, the controller module, the heart rate acquisition module and the power module. The design of the controller module is based on the design of a series of peripheral configuration circuit designs based on the main control chip NRF51822, such as a clock circuit design, a reset circuit design antenna matching circuit and the like. The heart rate acquisition module is mainly used for acquiring and processing the heart rate signal through the sensor. In the design of the power module, this paper not only designs the power supply module, but also increases the hardware circuit design of the charging module and the battery power detection module. The software design of the slave is mainly to program the main control chip NRF51822. This paper will be designed based on the establishment of the communication link, the realization of the heart rate monitoring function, the realization of the RSSI anti-dropping function and the realization of the battery power detection function. In this section, the heart rate algorithm and the RSSI ranging principle involved will also be described in detail. Finally, the system functions are tested by two methods. Firstly, the data packet of the Bluetooth broadcast channel and the data channel is grabbed, and the data is analyzed to judge the system function. The second is to perform functional verification on the system by the corresponding APP.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP368.33;TN925
本文編號：2445315
[Abstract]:In recent years, with the rapid development and perfection of the intelligent wearable technology, more and more intelligent wearable products appear in our lives. And the field of the intelligent wearable products also extends from the most starting entertainment information field to the fields of sports and health care and the like. The appearance of intelligent wearable products makes people's life more intelligent. Based on the background of the intelligent wearable technology, and in combination with the reality that children have been forgotten in the car in recent years, this paper will design a wearable heart rate monitoring and anti-loss system for children with such accidents. The system differs from other children's anti-loss systems already in the market in that most of the child-proof products on the market are designed based on the purpose of preventing the loss of children. Some simple anti-drop devices are only designed to achieve a simple anti-loss function by distance setting, which is generally not high in precision. And some high-end child anti-dropping products are added with GPS positioning, GSM position inquiry and GPRS communication technology to track the position information of the children. This kind of product, though powerful, has a high cost and is a little small for preventing children from being forgotten in the car. Therefore, this paper designs a wearable heart rate monitoring and anti-loss system based on NRF51822 for the above-mentioned problems. The innovation of the system is that the heart rate monitoring function is added in addition to the function with the missing reminding, so long as the parent can see the state of the child through the heart rate monitoring in the condition that the child is locked in the car in the communication connection range, and the accident can be avoided. The design of the system will be of great significance to the occurrence of such accidents that prevent children from being left in the car. The design of the system is based on a Bluetooth 4.0 BLE chip NRF51822, combined with a heart rate sensor, a heart rate algorithm and an RSSI ranging technology, and a wearable heart rate monitoring and anti-loss system for communicating with the Android smart phone by using the BLE wireless communication technology. The system is divided into two parts, and one part is an intelligent wearable product worn on a child. This article is defined as a slave, which is part of the research. The second is the intelligent Android mobile phone carried by the parents, which is defined as the host. In this paper, the communication mode between the slave and the host is completed, and the data interaction of the master-slave machine will be completed with the Bluetooth 4.0 BLE technique. The overall function of the system is that when the slave and the host are connected through the BLE technology, the host can monitor the heart rate of the wearer of the slave machine, and when the heart rate of the wearer exceeds the preset heart rate range in the host, the host can alarm to prompt, So as to achieve the purpose of monitoring the heart rate of the child. The anti-loss function is realized on the basis of the principle of RSSI ranging, and when the distance between the slave and the host exceeds the preset distance range of the host, the main opportunity issues an alarm signal to remind the host carrier that the slave is lost, thereby achieving the purpose of preventing forgetting. The communication mode between the slave and the host is one of the important links in the design of the system, so this paper will introduce the Bluetooth 4.0 technology in Chapter 2, including the development of Bluetooth, the technical features of Bluetooth 4.0 BLE, the characteristics of the protocol stack and the network topology. In addition, as two important functional modules of the system, the heart rate monitoring module and the anti-dropping module. The techniques involved in the second chapter are also described in the second chapter, such as the heart rate acquisition technique used by the heart rate monitoring module and the ranging technology involved in the anti-drop module. In the hardware design of the slave, this paper will adopt the modular design, that is, the slave machine is subdivided into various modules in the hardware structure. The slave system consists of three modules, namely, the controller module, the heart rate acquisition module and the power module. The design of the controller module is based on the design of a series of peripheral configuration circuit designs based on the main control chip NRF51822, such as a clock circuit design, a reset circuit design antenna matching circuit and the like. The heart rate acquisition module is mainly used for acquiring and processing the heart rate signal through the sensor. In the design of the power module, this paper not only designs the power supply module, but also increases the hardware circuit design of the charging module and the battery power detection module. The software design of the slave is mainly to program the main control chip NRF51822. This paper will be designed based on the establishment of the communication link, the realization of the heart rate monitoring function, the realization of the RSSI anti-dropping function and the realization of the battery power detection function. In this section, the heart rate algorithm and the RSSI ranging principle involved will also be described in detail. Finally, the system functions are tested by two methods. Firstly, the data packet of the Bluetooth broadcast channel and the data channel is grabbed, and the data is analyzed to judge the system function. The second is to perform functional verification on the system by the corresponding APP.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP368.33;TN925
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