共查询到20条相似文献，搜索用时 78 毫秒
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"居家卫士"是通过固定电话来实现一般家庭的简单经济的安防报警解决方案,平台化优势明显,用户可通过IE登陆网站,查看告警记录。并且可以结合二级平台(如小区物业、居委会等)进行集中管理,是中低端商务和中高端家庭客户优选的安防产品。 相似文献
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主要探讨智能家居系统的子模块功能——智能安防报警系统,其工作原理为：以HT48R50A单片机为中央处理器,实现火警、烟警、液化气漏气报警、防盗拨号报警和语音报警.当有警情发生时可以拨号报警并通过报警电话时时监听,同时启动计算机进行网络监控. 相似文献
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针对现代安防的实际要求,设计了基于GPRS 技术及嵌入式ARM11的智能安防系统。系统通过ZigBee无线网络,实现ARM11与各安防监控模块的无线通讯,并通过GPRS网络实现了ARM11与业主手机之间的无线通讯：将报警短信及摄像截图的彩信发送给业主手机,并将业主的控制短信发送至ARM11,再通过ZigBee模块完成控制任务。整个智能安防系统实现了手机远程监控。测试表明,该系统报警及时、误报率低、扩展方便、操作性强,具有较广阔的市场空间。 相似文献
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《赤峰学院学报(自然科学版)》2017,(11)
本文基于物联网技术设计出一套智能家居安防系统配置方案.以STM32F107VCT芯片作为中央控制模块,外围电路分别设计了火灾检测模块,煤气泄漏检测模块,漏水检测模块,防盗检测模块,远程通信报警模块,室内报警模块.通过各个单元模块的传感器监测家居环境,如果检测到有危险情况发生,由传感器产生相应的报警电信号,送至中央处理单元,中央处理单元处理后同时产生本地报警和远程通信报警.本家居安防系统可以实现家庭火灾,煤气泄漏,自来水泄漏,非法入侵检测和报警功能. 相似文献
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实验室安防系统的设计 总被引：2，自引：0，他引：2
文中针对实验室防火防盗报警系统的局限性,提出一种基于电话网络为传送通道的智能自动安防系统,实现实验室的安全状况实时监控.采用单片机负责检测探测器信号的实时数据采集和处理,在有警情发生时启动以电话网为传输通道的报警模块进行自动拨号报警.该实验室安防系统具有结构简单、可靠性高、成本低等优点,因此具有较强的应用前景. 相似文献
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光纤周界安防系统——一种新型安防系统在校园建设中的应用 总被引：1，自引：0，他引：1
针对大学校区安全防范的特定要求和具体特点,对周界安防进行了合理化的设计与施工,从整体性、稳定性、适用性和经济性方面对选用的技术进行了宏观的考虑,并介绍了当前周界安防技术领域内的一种新技术--全光纤防入侵报警技术.该技术直接利用光纤作为侵入信号的传感介质,实现对周界的实时监控,是当前世界上最为先进的一种周界安防技术. 相似文献
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房颖 《河北软件职业技术学院学报》2010,12(1):50-54
设计并实现了一种基于PIC单片机、以太网通信技术的智能家居安防监控报警系统,给出了系统的功能和结构以及硬件原理框图和软件设计思路。该系统主要采用Mi-crochip 16位单片机与以太网控制器ENC28J60芯片组成的硬件电路。经过调试与检测证明,该系统性能可靠,易于使用,不仅有效地实现了快速报警、远程监控功能,还提高了家庭安防报警的可靠性,具有广泛的实用价值。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献