共查询到20条相似文献，搜索用时 78 毫秒
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介绍了检测与转换技术网络化的教学实验监测终端系统,该终端硬件设计包括单片机基本应用系统、信号检测与转换电路、人机接口电路、CAN通讯电路等.其中微处理器负责数据的处理和控制信号的输出,信号采集电路负责模拟信号和波形的采集及其数字化转换,人机接口负责系统功能设定、信息录入与人机对话,CAN通讯电路实现数据的远程传输.软件设计采用C51语言编程,以模块化思想构建整个系统.借助仿真软件Multisim 10和Proteus 7.1对系统进行仿真分析,仿真结果表明设计可行,达到了预期目的. 相似文献
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介绍了以超低功耗单片机MSP430为核心的高精度压力传感器的硬件电路设计,针对压力传感器的温度漂移问题分析了用于温度补偿的BP网络算法,通过单片机对MPM280压力传感器的温度和压力信号采集,构造四层BP神经网络进行离线训练,将训练好的网络模型利用C语言完成编程,研究了单片机软件实现方式. 相似文献
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崔业梅 《襄樊职业技术学院学报》2011,10(4):22-24
波形发生器的控制系统采用AT89S52单片机,D/A转换系统采用DAC0832芯片,编制程序产生方波、三角波、正弦波,在输出端用示波器观察波形。该设计利用Proteus软件进行硬件电路绘制,利用Keil软件进行软件编程,两者整合进行调试。 相似文献
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王彦朋 《赤峰学院学报(自然科学版)》2014,(22):23-24
本文介绍了51单片机硬件电路图的扫描器识别系统,通过单片机、示波器和软件编程的结合,来实现条形码扫描器对电路图的自动识别以及信息的采集.理论表明此电路图扫描器,具有对硬件电路图的扫描识别,及对硬件的电路图的信息采集和存储的功能. 相似文献
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分析了容栅式传感器的结构和原理,以及该传感器在长度测量中的应用。对于声速测定仪中电子数显尺的常见故障原因进行了分析,并总结出维修方法。 相似文献
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詹泽海 《深圳职业技术学院学报》2010,9(1):7-11
文章介绍一种模拟量信号的采集方法,包括不同类型模拟量传感器在信号采集系统中的具体接线与注意事项,如何利用STEP7V5．4编程平台针对不同类型模拟量传感器进行硬件组态,以及借助STEP7V5．4编程平台自带的变量表功能对系统进行进一步的在线调试与数据监控． 相似文献
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基于MCGS和80C51的流量监控系统设计 总被引：1，自引：0，他引：1
企业生产过程中,对控制系统的要求越来越高,要求控制人员最好能远离现场进行操作,从而减少现场环境对人身的伤害.由此产生了一系列组态软件,编写上位机监控软件,进行远程监控.本文介绍了基于MCGS和单片机的远程流量监控系统的硬件和软件设计.此系统采用主从式结构,上位机采用MCGS组态软件实现监控软件,对流量信息进行实时监控;下位机以单片机为核心,应用涡轮流量计LWGY-10作为流量传感器,进行流量信息的采集和转换,并与上位机通过串口方式进行信息交互. 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