基于蓝牙技术的智能车实时监测系统的研究

研究开发了以Freescale公司MC9S12DG128单片机为核心控制单元的智能车无线监测系统。系统主要由传感器模块、数据采集与处理模块、UART通讯模块、蓝牙通讯模块、上位机模块组成。详细介绍了以上4个模块的设计开发。经过测试表明,此系统工作稳定,对于摄像头图像的显示,速度曲线的绘制,PID参数修正等功能完全满足智能车调试的需求。     

可穿戴腕部体温监测装置设计

为解决各式体温计测温时间长、精度不高及操作繁琐等问题,提出并实现了一种基于腕部测温的可穿戴体温监测装置的设计方案.通过对人体体表温度和深度温度的分析,确定了腕部体表温度与以腋下温度为基准的体温间的补偿方案;对测温装置进行了设计实现并对数据的处理进行了优化.实验结果证明:设计的体温监测装置稳定性好,精度高,且支持高频率、实时的体温采集.     

Characterizing free-living light exposure using a wrist-worn light monitor

It was the purpose of this study to pilot the use of a new wrist-worn light monitoring device to document that indoor lighting for a particular day-shift work environment could serve as the primary light exposure dosage in healthy free-living humans. Twelve employees of a local hospital volunteered to wear a wrist-worn light monitor during all waking hours for an entire workweek (Monday-Friday). Light data were analyzed (3-Factor RM ANOVA) for the dose of light exposure (minutes of exposure x light intensity) within six light intensity categories (< 1, 1-100, 101-200, 201-500, 501-1000, > 1000 1x) relative to time spent within their work environment and all other time of the day. The greatest dose of exposure occurred within the 201-500 1x range during the subjects' work shift. These data support the premise of others that long term exposure to dim indoor light intensities commonly experienced within a variety of work environments may serve as the primary entrainment factor for physiological and behavioral processes following a circadian rhythm.     

基于QNX的车机蓝牙无线监控系统

提出基于QNX的车机蓝牙无线监控系统方案,以手机端和车载端的蓝牙SPP协议为基础,设计CAN-USB模块作为车机通信枢纽,对两端蓝牙无线指令数据进行对等收发和处理;采用CAN总线实时采集和配置车辆ECU的各项性能参数。实验表明,该方案不仅能用手机对车辆运行状态进行实时监测和控制,而且有效提升了车辆操控的互联性和智能性。     

基于蓝牙自组网的液压支架压力监测系统设计

针对现有矿井液压支架监测系统布线复杂、数据传输不稳定、维护困难等问题,设计了基于蓝牙自组网的液压支架压力监测系统。该系统通过蓝牙技术组建的无线自组网解决了繁杂的布线问题,使用蓝牙无线通信和以太网传输液压支架压力数据,传输速率快,性能稳定,工作人员利用上位机软件,即可实时对液压支架压力值进行分析。     

基于蓝牙技术的小区供水设备远程监控系统

介绍了一种远程控制和监视生活供水设备的方法.通过PLC模拟量模块实现管路、压力和流量的测量;PLC数字量模块实现供水设备状态监视、故障和远程启停信号采集.借助蓝牙通信技术实现远程数据信号的交换,使小区物业可在办公室对供水设备远程监控.应用计算机组态软件对现场采集的数据进行分析、处理,同时在显示屏上显示窗口和棒状图形,以...     

蓝牙多Profile ADSL接入系统

从接入系统的功能开始,介绍了蓝牙协议结构和该接入系统的应用框架,重点在系统层面上阐述了蓝牙多个Profile集中在一起的ADSL语音数据无线接入系统的结构,提出了其通讯模型和ADSL 蓝牙SoC解决方案。     

蓝牙技术在施工机械在线监测中的应用

在对蓝牙技术及其原理讨论的基础上,结合施工机械状态监测现场的具体特点,提出了一种新型的施工机械状态无线监测系统,实现了对施工机械状态的实时监控,提高了施工机械的智能化水平。     

Development of a monitoring system for keyboard users' performance

To precisely evaluate the typing performance of a VDT user, a program named KBlog was developed to record the typing activity under the Microsoft Windows operating system. This program is small and simply framed in order to avoid overloading of the operating system. Without interfering with the typing task, this program can record the time of every pressing and releasing movement of each keystroke at the millisecond level. The accuracy and reliability of KBlog was tested by comparing time intervals recorded by KBlog to time intervals of keyboard output electrical signals recorded by an oscilloscope. In the regression analysis on these two indicators, results of high correlation coefficients of almost 1.000 and intercepts within acceptable levels of around 1 ms indicated sufficient accuracy and reliability of this program. Further applications are discussed in this paper concerning both laboratory and field researches.     

Development of a monitoring system for keyboard users' performance

To precisely evaluate the typing performance of a VDT user, a program named KBlog was developed to record the typing activity under the Microsoft Windows operating system. This program is small and simply framed in order to avoid overloading of the operating system. Without interfering with the typing task, this program can record the time of every pressing and releasing movement of each keystroke at the millisecond level. The accuracy and reliability of KBlog was tested by comparing time intervals recorded by KBlog to time intervals of keyboard output electrical signals recorded by an oscilloscope. In the regression analysis on these two indicators, results of high correlation coefficients of almost 1.000 and intercepts within acceptable levels of around 1 ms indicated sufficient accuracy and reliability of this program. Further applications are discussed in this paper concerning both laboratory and field researches.     

基于蓝牙技术的城市交通系统

提出了基于蓝牙技术的智能交通系统在城市中运用的系统方案。详细介绍了最新的蓝牙规范,结合现代数字无线通信技术,通过蓝牙通信收发模块,实现实时数据采集、监控查询、事故应急和交通控制以及与系统现有各种网络信息之间的数据融合。系统的蓝牙应用具有低成本、低功耗、高稳定性、高灵活性和可扩展性等特点,可极大地提高城市交通运行的效率,有效解决了城市交通系统信息化面临的众多难题。     

基于MCU实现蓝牙与PC机之间HCI层传输

分析了蓝牙HCI层的主要功能,并简述了蓝牙HCI层数据传输的单片机控制方案。HCI指令从RS232串口通过单片机的UART输入,经校验后发送至蓝牙模块,蓝牙模块返回的HCI事件在单片机内进行分组打包后发送至PC机。     

蓝牙手机室内定位系统

设计并实现了一种基于蓝牙和Wi-Fi的低成本手机定位和信息发布平台。改进了已有蓝牙设备RSSI检测方案,能对多个手机同时定位;利用Wi-Fi和J2ME技术实现了手机对定位信息的接收和实时显示。实验结果表明系统具有定位准确、使用方便等特点,在目前硬件条件下为物联网应用提供了平台支持。     

基于Arduino/Android的蓝牙通信系统设计

针对当今安全监控系统的发展需求,以Arduino开发板和手持Android终端为研究重点,给出了包括Arduino开发板及板端程序,以及手持Android客户端程序的蓝牙通信系统设计方案,其中Arduino开发板端将采集到的温度数据通过蓝牙传送到手持Android客户端,并通过应用程序在手持终端上显示。测试表明,这种蓝牙通信系统能够为安全监控系统提供更加经济和安全的通信方式。     

Estimation of various sitting postures using a load-cell-driven monitoring system

Maintaining correct sitting posture is highly likely by simply informing seated people of their current sitting postures. Few studies have simultaneously applied load distribution measurements and sitting posture feedback to measure bodily pressure distribution. Commercialization of sitting posture monitoring systems has been difficult due to high cost. This study tested a system that measures load on the seat pan and load transferred to the backrest using four load cells installed on the seat pan. Three body weight ratios were calculated and differences in body weight ratios were tested among six sitting postures. The results were considered highly reliable based on strong correlations among three instruments’ results despite differences in force plate and dead load between the results of the monitoring system and the load-measuring system. The findings encourage commercialization and future research that includes gender and physical characteristic differences.     

Development of a microprocessor-based monitoring system for post-surgical cardiac patients

A univariate index of cardiovascular status has been constructed for use in monitoring patients in a post-surgical cardiac intensive care unit. Feature selection techniques are applied to show that the patient's skin temperature and mean blood pressure are the most sensitive indicators of long term changes in the patient's cardiovascular status. The index is constructed on the basis of these variables. The values of this index calculated at regular intervals form a time series which can be smoothed and forecast using appropriate algorithms. The FORTRAN algorithms for evaluating the status index and carrying out the necessary time series analysis have been implemented on a Z80 processor, together with several housekeeping routines written in assembly code. The difficulties which were encountered in implementing this system are described. The resulting instrument is inexpensive, simple and reliable in operation and is at present undergoing clinical trials in the hospital ward.     

采用自供电无线传感网络的电线安全监测系统

电线故障会引起火灾,对电线温度、电流进行在线监测能预防事故发生。设计了采用自供电无线传感网络的电线安全监测系统,系统由传感节点、中继节点、路由节点、服务器和客户端组成。采用自供电技术解决无线传感网络监测系统中传感节点不能持续供能的问题,对传感节点工作状态进行控制以降低传感节点能耗,传感节点具有体积小、能耗低、不用更换电池等特点。分析自供电条件下,无线传感网络的网络结构,引入中继节点,延伸通信距离。将系统用于电线安全监测,该系统通信可靠、工作时间长、数据实时、人机操作方便,为电线安全的监测提供了技术支持。     

多个蓝牙匹克网共存时的同频干扰性能分析

蓝牙匹克网之间的同频干扰是蓝牙应用面临的重要问题之一。在分析蓝牙匹克网发生同频干扰原因的基础上,通过理论分析和系统仿真,对同频干扰条件下蓝牙系统的两个重要性能参数误包率和吞吐量进行了评估,提出了增强蓝牙系统性能的方案。仿真结果显示在多个匹克网共存时,匹克网的数目对蓝牙系统的误包率和吞吐量有重要的影响,采用正交跳频序列可以有效改善蓝牙系统的性能。     

机载电源在线监测系统的研制

机载电源的供电质量对飞机的安全飞行和机载用电设备的正常工作至关重要。在电子试验机试飞环境中,各机载用电设备处于不同的工作状态,可能会影响机载电源的供电质量,因此,需要对试飞中的机载电源进行持续的在线监测,评估其供电质量。针对此,研制了一种机载电源在线监测系统,对115V/400Hz三相交流、28V直流电源的多工作特性参数进行持续的在线监测。该系统基于高性能专用计算机和高速同步数据采集卡,对机载电源电压和电流进行实时采集,采用相关数据处理算法,对多工作特性参数进行快速实时运算,并显示和存储,并对异常工作点的电压、电流进行录波,以便后期分析。该系统在某型电子试验机上进行了实验,监测结果实时、准确,对机载电源提高可靠性和故障分析定位具有重要的意义。     

Architecture and implementation of a smart-pregnancy monitoring system using web-based application

Today, people use web-based technologies to meet their information needs, socialise, communicate, and deal with formal and informal processes. At the same time, mobile versions of these applications provide people with great convenience in daily life. These applications include blood-pressure monitors, blood-glucose monitors, body-analysis scales, pulse oximeters, and activity and sleep trackers. Many of these products sync directly with a free mobile app that makes monitoring, viewing, storing, and sharing of health vitals simple and comprehensive. The data collected from the user is stored in a cloud-based application, then trained by intelligent algorithms that use machine learning for health aims so that the user can instantly see his or her status and development. In this study, the aim was to construct a cloud-based application specific to women for monitoring pregnancy. In the web-based application working with membership logic, members can access machine learning assisted calculators of the baby percentile, period tracker, pregnancy calendar, and baby vaccination schedule. Moreover, they can access augmented/virtual-reality-assisted visual training.