Design of Signal Lamp Filament Monitoring Alarm Instrument

To improve the reliability of the light emitting diode(LED)signal lamp filament current monitoring alarm instrument for metro systems,a new type of hot standby online monitoring apparatus was developed which is based on synchronous transmission data(STD)bus technology.In this system,a double hot standby mode can be achieved by adopting bus arbitration.In addition,to detect the effective value of alternating current which is from 0 to 200 mA in the signal lamp lighting circuit,a precision rectifier signal conditioning circuit and an isolated acquisition circuit were designed.This new type of alarm instrument has high detection accuracy and could meet the functional requirements for metro signal systems after comparing it with some industry products that were applied on the spot.

An ECG Monitoring and Alarming System Based On Android Smart Phone

ECG monitoring in daily life is an important means of treating heart disease. To make it easier for the medical to monitor the ECG of their patients outside the hospital, we designed and developed an ECG monitoring and alarming system based on Android smart phone. In our system, an ECG device collects the ECG signal and transmits it to an Android phone. The Android phone detects alarms which come from the ECG devices. When alarms occur, Android phone will capture the ECG images and the details about the alarms, and sends them to the cloud Alarm Server (AS). Once received, AS push the messages to doctors’ phone, so the doctors could see the ECG images and alarm details on their mobile phone. In our system, high resolution ECG pictures are transmitted to doctors’ phone in a user-friendly way, which can help doctors keep track of their patient’s condition easily.

Doppler Radar Fault Judgment System and Remote Monitoring Platform

The Doppler weather radar fault judging system and remote monitoring platform were introduced.Through the real-time scanning of radar alarm information coding,the platform can realize dynamic monitoring and real-time alarm of Doppler radar equipment components,so as to improve the reliability of equipment operation,and truly realize"unattended"remote monitoring.

Real-Time Grouting Monitoring and Visualization Analysis System for Dam Foundation Curtain Grouting

A real-time monitoring and 3D visualization analysis system is proposed for dam foundation curtain grouting. Based on the real-time control technology, the optimization method and the set theory, a mathematical model of the system is established. The real-time collection and transmission technology of the grouting data provides a data foundation for the system. The real-time grouting monitoring and dynamic alarming method helps the system control the grouting quality during the grouting process, thus, the abnormalities of grouting, such as jacking and hydraulic uplift, can be effectively controlled. In addition, the 3D grouting visualization analysis technology is proposed to establish the grouting information model(GIM). The GIM provides a platform to visualize and analyze the grouting process and results. The system has been applied to a hydraulic project of China as a case study, and the application results indicate that the real-time grouting monitoring and 3D visualization analysis for the grouting process can help engineers control the grouting quality more efficiently.

Design and Implementation of Environment Monitoring and Alarm System for Broiler Breeding Based on Internet of Things

Environment plays a vital role in the breeding process of broilers. In order to effectively monitor and control the breeding environment of broilers, a broiler breeding environment monitoring and alarm system based on internet of things is studied and established. The system adopts the narrow band internet of things communication technology, and can transmit the temperature, humidity, illumination and ammonia and other environ-mental data in the chicken house remotely through terminal collection unified interface device. Meantime, it realizes the control of fans, wet cur-tains, small windows and illumination in the chicken house by threshold method. The system software is designed and implemented by C#, SQL Server, WeX5 and other development tools, including platform terminal and enterprise terminal. Since its operation, the system is featured by stable state, reliable data and timely alarm, which solves the problem of unified control of different sensors and realizes the effective control of house envi-ronment.

An Automatic Monitoring and Alarming Method for the Power Supply of Weather Radars

As weather radar stations require headroom environment to operate,they were mostly built on highlands which are usually unattended.The mains supply is relatively poor,and the risk of radar stoppages due to power outage is therefore ever-present.As such,the radar construction program is used to build a complementary security video monitoring system.By collecting monitoring images of the regulated power supply in real-time from power supply auto transfer systems in distribution rooms and radar transceiver rooms,using Spearman’s rank correlation coefficient to analyse pixel variation trends,and supplementing statistical analysis of pixel characteristics difference to eliminate misjudgments resulting from low image contrast in special scenarios,a software can be developed through C#.It has the function of automatically monitoring mains supply and alerting staff on duty to handle the power outage in a timely manner via text message so that any potential risk is neutralised before it can cause damage.This monitoring and auto-alerting approach is generally applicable to unattended rooms with large amounts of electronical equipment.

The Monitoring with Video and Alarm System Based on Linux Router

As one of important safeguarded measures in security field, the video monitoring system have been applied in extensive ways such as building’s security,information’s acquisition and medical treatment. In current time, the intelligent home systems as well as the Internet of Things are forming a more and more mature industrial chain. With abundant of new technology applications, this industrial chain is developing towards to a more intelligent way. One of the most important applications is the video monitoring system developed by new technology. Deploy an appropriate design of video monitoring system in the several fields such as public security, traffic schedule, systems control and so on, is a major technological medium which can guarantee not wasting an amount of manpower resource as well as keeping the system in a good running status. This article based on the preponderance of the Linux system, especially the character of open source of it. Combine the Linux system and some particular routers;designing a real-time and efficient video monitoring system. It’s functional and in the meantime it can discriminate abnormal information or the situation automatically and then raise the alarm. This system use matured B/S mode in software’s framework, which is also lightweight class. In addition, this system manages the expenses in hardware cost more commendably.

Feature extraction and damage alarming using time series analysis

Aiming at the problem of on-line damage diagnosis in structural health monitoring （SHM）, an algorithm of feature extraction and damage alarming based on auto-regressive moving-average （ARMA） time series analysis is presented. The monitoring data were first modeled as ARMA models, while a principalcomponent matrix derived from the AR coefficients of these models was utilized to establish the Mahalanobisdistance criterion functions. Then, a new damage-sensitive feature index DDSF is proposed. A hypothesis test involving the t-test method is further applied to obtain a decision of damage alarming as the mean value of DDSF had significantly changed after damage. The numerical results of a three-span-girder model shows that the defined index is sensitive to subtle structural damage, and the proposed algorithm can be applied to the on-line damage alarming in SHM.

New Method for Monitoring Tire Pressure of Cars Based on the Tire Radial Deformation

Monitoring tire pressure of cars and signaling abnormal conditions is an important means to prevent deadly accidents. Large achievements have been gained, especially in direct tire pressure monitoring system（TPMS）. But there has been rarely research on indirect TPMS in the world. In China, the research on indirect TPMS is almost lacking. The international research on the indirect monitoring tire pressure method is mainly based on measuring and comparing the rotating speed of wheels. But it is very difficult to measure wheel rotating speed accurately because of the influence of many random factors. In this paper, the authors propose a new method in which the tire pressure can be monitored indirectly. This method can be used for tire calibration, wheel speed frequency standardization, wheel speed frequency comparison, and abnormal tire pressure determination. The pulse frequencies from wheel speed sensors of ABS are used to indicate tire deformation. Because the frequency has a relationship with tire deformation, the tire deformation reflects the tire pressure. Small sample statistics is used in the new method to increase the accuracy, and the experimental samples using the principle of the new method have been made and tested. The result of vehicle tests on road demonstrates that the method is efficient and accurate to monitor tire pressure. The research has positive potential for developing products.

The Research of Ship Cabin Monitoring System on Single Chip Computer

The monitoring system of ship cabin based on single chip computer is introduced. The system can inspect the signal circulatively coming from sensors of all kinds, and give alarm when limit is broken. It demonstrated the working principles, hardware block diagram and software flow diagram of the system.

Design, Integration and Characterization of a Tracking Patch: Application to Elderly Monitoring

According to the latest studies, the French population witnesses a high level of elderly. It follows from this phenomenon health troubles, fragility, and for some people suffering from cognitive problems, a daily need of monitoring and tracking in the fugues cases. It is in this context that comes our research program SACHA (Search and Computerize Human Acts). Our ambition is to develop an electronic patch able to trigger alarms, detect falls and provide geolocation service. Our studies were focused on the conception and the integration of different antennas and functionalities of this system in aim to ensure a good compromise “integration/performances”. Several prototypes have been tested and validated in a nursing home.

Influence of some factors on alpha energy spectrum of^(241)Am fire alarm source

Several primary factors influencing the alpha energy spectrum of 241Am fire alarm source have been studied in order to get better alpha energy spectrum. The results show that the homogeneity and the thickness of metal surface coat and the size of active area of the source have considerable influence on the alpha energy spectrum of the source.

基于STM32单片机的家庭安防系统设计

为了更好地对居家环境进行安全监测与防范,以STM32F103单片机为处理核心设计了一套家庭安防系统。系统采用各种传感器进行环境监测,并将监测信息传至单片机,进行存储、显示与报警等处理,同时通过ESP8266无线传输模块将监测信息传至互联网,实现远程监测与报警。试验结果表明,传感器与报警系统工作正常,数据传输准确,验证了系统设计的可靠性。

Study of safety performance of the ^(241)Am fire alarm source

The safety performance of 241Am fire alarm sources made by using powder metallurgical technology has been preliminarily studied, so as to determine an allowable maximum energy limit value of the alpha particles outgoing from this kind of sources in light of radiation safety and the present technology. The yielded results show that 241Am leak has not been found when the peak energy of the alpha energy spectrum of this kind of sources is less than 4.96 MeV.

基于STM32的智能家居安防系统设计

物联网应用技术快速发展,智能安防产品受到越来越多人的关注,尤其是智能家居安防产品。为了最大程度确保人身以及财产安全,满足人民群众对自身安全和家庭安防的要求,以STM32为主控芯片,结合各类智能传感器、控制器、报警器及智能手机小程序,设计并实现一套基于STM32的家居安防报警系统,该系统能实时、远程监测家居室内外环境状况,及时、有效防止家居安全事故发生,对保护家庭成员生命、财产安全具有重要的现实意义。

基于医疗失效模式与效应分析优化急诊抢救室心电监护仪报警应答管理流程的研究

目的 探讨医疗失效模式与效应分析(health failure mode and effect analysis, HFMEA)在急诊抢救室心电监护仪报警应答管理流程中的应用效果。方法 将2023年7月-9月急诊抢救室收治的48例患者设为对照组,将2023年10月—12月急诊抢救室收治的48例患者设为观察组,对照组采用常规流程对心电监护仪报警进行应答管理,观察组采用基于HFMEA优化后的流程对心电监护仪报警进行应答管理。比较2组心电监护仪误报警率、报警应答有效率以及护士报警疲劳评分。结果 观察组心电监护仪误报警率低于对照组(χ2=156.225,P<0.001),报警应答有效率高于对照组(χ2=81.823,P<0.001),且实施HFMEA后急诊抢救室护士报警疲劳得分低于实施前(t=5.093,P<0.001)。结论 应用HFMEA对急诊抢救室监护仪报警应答管理流程进行优化,降低了心电监护仪误报警率,提高了报警应答有效率,减轻了护士的报警疲劳,从而有效防范因监护仪报警应答管理缺陷而导致的医疗风险。

基于3G的高层楼宇家庭远程监控报警系统

随着科技的日新月异,家居的高楼大厦也在朝着智能化的方向发展。基于3G的高层楼宇家庭远程监控报警系统旨在将家庭智能建筑内部的各类物联感知前端的数据进行统一汇聚传输至远程监控报警系统,把数据提供给实战指挥平台进行集成,指挥人员可在实战指挥平台上直观地查看建筑内部消防传感器状态,为指挥决策提供数据支撑。同时,利用3G等多种现代信息技术手段,对可燃气体探测器、烟雾探测等设施正确采集多传感器数据并实施监控,可实现家庭智能防火预警系统监控和报警火灾的目标,从而达到预期目的。

基于常压质谱技术的化学反应中间体监测研究进展

随着科技的发展,化学反应研究逐渐在合成、化工、能源、环境、生物、医学等领域展现出重要的推动作用。然而,反应基质复杂,中间体种类、分子质量、寿命及动态变化多样,反应条件各异,使反应中间体的捕获与检测难度增大,同时给检测提出了更高要求。常压质谱技术因具有高灵敏度、高选择性、分析速度快、原位监测等特点,近年来在化学反应中间体的监测及机理探究方面展示出独特优势。基于此,本文综述了常压质谱技术在电化学、光化学、等离子体化学、微滴化学等反应过程中,反应中间体捕获、检测、监测及相关机理研究等方面的进展。针对不同反应类型,详细介绍常压质谱检测方法的建立,阐明其在瞬时反应中间体的捕获和机理探究方面的应用,并进行总结和展望。

射频负离子源中性束关键参数监控报警系统研制

为有效解决射频负离子源实验运行中关键参数监控不集中、报警不及时等问题,设计并开发了基于实验物理与工业控制系统(EPICS)架构的射频负离子源中性束关键参数监控报警系统。通过Phoebus集成开发平台实现监控报警界面的开发,基于Channel Access(CA)协议和s7nodave设备驱动模块实现EPICS与LabVIEW、PLC的跨平台集成。系统目前已在射频负离子源测试实验中正常运行,实现对中性束注入关键参数的可视化实时监控、故障报警和故障追踪,为射频负离子源中性束实验的正常运行提供了可靠的保障。

北斗三号系统卫星自主完好性监测技术

完好性对于全球卫星导航系统(GNSS)来说至关重要,关乎到其能否被放心应用。卫星自主完好性监测(SAIM)技术,是完好性监测技术发展的前沿趋势,国内外卫星导航系统均竞相发展。介绍了北斗三号系统SAIM技术设计与实现的重要意义,从功能设计和实现原理两个方面,阐述了北斗三号SAIM技术体制。针对SAIM实际在轨监测数据的正态分布特性服从程度和长期稳定性等问题,随机选取某一颗中圆轨道(MEO)卫星自2020年7月31日北斗三号系统正式开通服务以来至2021年7月31日连续1年期间的监测数据,得到真实在轨监测数据的分布特性。最后,提出了告警门限优化、分级告警策略设计、星历完好性自主监测等方面的后续发展必要性建议,旨在为北斗系统更好地为全球用户提供更优质的完好性服务提供参考。