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基于ARM7的畜牧养殖智能消毒机器人控制系统设计 总被引:1,自引:0,他引:1
电子技术的发展带动机电产品向智能化、人性化的方向发展。本系统采用嵌入式系统以ARM7为远程机器人控制核心,结合GPRS和WIFI无线网络,实现机器人远程控制和工作环境实时监控。安装相应的消毒结构,可以实现远程消毒工作,实现养殖消毒智能化。 相似文献
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介绍了一种以ARM嵌入式开发板为核心、融合因特网通信和GPRS无线通信技术的,智能家居安防监控系统,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.该系统由传感器采集信号,摄像头采集图像,经ARM开发板处理后,利用因特网和GPRS模块传输到远程的监控中心.使用Boa嵌入式Web服务器和SQLite数据库搭建远程监控系统,用户通过点击网页上的按钮远程发送控制命令.实验测试表明,该系统不仅有效地实现了快速报警、远程监控功能,还实现的图像的抓拍、打包下载等功能,满足远程监控的设计要求. 相似文献
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本设计采用液晶温度感应器做温度检测,用MQ-2烟雾传感器做可燃气体检测,将家庭火灾检测、燃气泄露报警系统相结合,实现对家庭常见火灾威胁进行监控并报警。系统报警方式为蜂鸣器蜂鸣报警和短信报警,实现进程报警与远程报警结合。短信报警模块可以存入六个报警号码,针对不同险情分别发送对应内容的报警信息。本系统以生活辅助的身份,帮助用户检测环境安全状况,在险情发生时及时提醒业主做出相关行动,最大限度的减少家庭损失。 相似文献
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介绍了振动光缆报警系统的组成及原理。并在此基础上,应用GPRS技术,设计了基于GPRS的振动光缆周界报警系统。利用GPRS的短消息功能,实现无线远程报警功能。文中描述了应用GPRS模块的设计与应用,根据应用环境的不同采取不同布防方式,而由于采用无线传输报警,系统布防简单、便于施工。该系统已成功应用于2010年广州亚运会水下安防系统中,通过用户测试验收、系统运行可靠、漏报警率低、虚警率低。 相似文献
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为了实现远程入侵监控报警的需求,设计了一种基于MMS功能的红外入侵检测监控报警系统,该系统把红外技术、彩信技术、无线通信技术充分结合起来,实现了将监控现场采集的入侵者图片通过GPRS网络以彩信的形式发送到用户手机的功能,使用户远离家中也可以实时掌控家中的情况。 相似文献
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根据小电厂实行无人值班监管的发展要求,设计一种基于GPRS技术的小电厂远程监控系统。以LPC2378为CPU的监测节点采集监控参数,由GPRS模块经过GPRS网络传给远程监控中心进行集中显示、数据处理。监控中心通过数据分析,给出设备故障报警、越限报警等。实验结果表明:该系统采集到的数据真实、可靠,满足小电厂无人值班的要求。该系统实现远程无线监管,监控范围广,可减少电厂管理人员、提高值班人员的工作效率50%以上。 相似文献
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《Solid-State Circuits, IEEE Journal of》1977,12(6):662-673
The quest for a minimum-parts-count DPM led to the development of this monolithic, low power analog-to-digital converter. It incorporates the analog and digital functions historically implemented separately with specialized process technologies into a chip with full /spl plusmn/3 digit accuracy. The integration of resistors, compensation capacitors, and an oscillator reduces the external component complement to three capacitors and one adjustable reference. TTL compatible outputs include sign, overrange, and under range information in addition to the three digit strobes and the BCD data outputs. The logic operates between +5 V and ground, the linear section between +5 V and -5 V. The paper describes the conversion algorithm and its CMOS implementation, emphasizing the analog design of this innovative device. 相似文献
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It is often necessary to approximate the probability density function of a random variable from given statistical moments. The Gram-Charlier Type A series is one well known method for such representations. In this note, the Gram-Charlier Type A series is generalized to the multidimensional case. 相似文献
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刘琪 《智能计算机与应用》2013,(6):85-87
在能够自动识别视频中的说话者的系统中,大部分采用的是声音和唇部运动相结合的方法。文中则采用了另一种方法有效地达到了目的,即通过检测人体头部和手部的运动来鉴别说话者。基于演讲者在说话时通常会伴有头部运动或是手部运动,该方法既能实现说话者的检测,又能避免由于观测点过远而导致无法判断人唇部运动的局限性。在系统的实施过程中,运用了多种图像处理方法,并且对三帧差运动法做出了改善,使其能更高效、更准确地检测到头部和手部的运动。经过多个不同的视频测试后,本系统的F1 score高达91.91%,从而验证了该系统的可行性。 相似文献
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This paper describes an analog-to-digital converter which combines multiple delta-sigma modulators in parallel so that time oversampling may be reduced or even eliminated. By doubling the number of Lth-order delta-sigma modulators, the resolution of this architecture is increased by approximately L bits. Thus, the resolution obtained by combining M delta-sigma modulators in parallel with no oversampling is similar to operating the same modulator with an oversampling rate of M. A parallel delta-sigma A/D converter implementation composed of two, four, and eight second-order delta-sigma modulators is described that does not require oversampling. Using this prototype, the design issues of the parallel delta-sigma A/D converter are explored and the theoretical performance with no oversampling and with low oversampling is verified. This architecture shows promise for obtaining high speed and resolution conversion since it retains much of the insensitivity to nonideal circuit behavior characteristic of the individual delta-sigma modulators 相似文献
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Yasuo Nagazumi 《Analog Integrated Circuits and Signal Processing》1996,11(2):173-181
In this article, a new multiplication type D/A conversion system using CCD is proposed and the result of simulations for evaluating its performance is reported. The system consists of a recursive charge divider which divides input charge-packet Qin sequentially into output charge-packets Qin · 2-i
and two charge-packet accumulators which accumulates output charge-packets from the recursive divider selectively according to digital input signal bits starting from MSB. The system converts input digital signal bit by bit, fully in charge-domain, thus the power consumption for this system is supposed to be very low. Also in this article, an effective method to achieve higher accuracy for splitting a charge-packet into two equal-sized packets using very simple hard-ware structure is proposed. As the result of simulations, we have found that the upper limit of accuracy for the conversion is determined by transfer efficiency of CCD, and within this range a trade-off relationship exists among conversion-accuracy, circuit-size and conversion-rate. This unique relationship enables to reduce the circuit size of D/A converter significantly maintaining the accuracy of conversion by slowing down the conversion-rate. This D/A converter is appropriate especially for the system integration because of its simple structure, tolerance to the fabrication error and low power consumption inherrent in the nature of CCD. By using of this system, it is expected to be possible to realize a focal plane image processor performing parallel analog operations such as DCT conversion with CCD imager incorporated on the same Si chip by the same MOS process technology. 相似文献
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《Solid-State Circuits, IEEE Journal of》1979,14(6):932-937
The design and measured performance of a fully parallel monolithic 8-bit A/D converter is reported. The required comparators and combining logic were designed and fabricated with a standard high-performance triple-diffused technology. A bipolar comparator circuit giving good performance with high input impedance is described. Circuit operation is reported at sample rates up to 30 megasamples per second (MS/s), with analog input signal power at frequencies up to 6 MHz. Full 8-bit linearity was achieved. An SNR of 42-44 dB was observed at input signal frequencies up to 5.3 MHz. 相似文献