人工气候室温度检测电路的设计及干扰校正算法

如何对温度实现高精度的检测和大范围的调节是人工气候室监控系统设计的关键，针对人工气候室温度控制的特点，分析了通用桥式温度检测电路存在的干扰特性，通过单片机实现无触点开关的关闭控制，设计出含参照桥臂的改进型数字温度检测电路，并给出了一种测温电路误差校正的三拍算法，该方法在LRH-250-GSI型智能人工气候室的温度控制系统设计中得到成功应用，实验结果表明，基于改进电路结构的误差校正三拍算法为提高传统桥式测温电路的温度检测精度提供了一条有效的途径。     

新型数字温度传感器TMP100组成的温度巡检系统

介绍了一种新型数字温度传感器TMP100特点，阐述了基于12C总线的用TMP100和P87LPC764单片机组成了一种温度巡检系统，及其系统性能要求、系统硬件电路、软件设计思路和应用结果。该系统已在实践中得到成功应用，系统设计简单、抗干扰能力强、扩展方便，在诸如食品加工、医院、智能化建筑等领域的多点温度检测中有广泛的应用前景。     

单片机P87LPC767在智能化γ相机探测器系统中的应用

主要介绍了单片机P87LPC767在所设计的智能化γ相机探测器系统中的应用.其中包括为保证系统的可靠工作,在系统工作过程中运用单片机对探头的工作温度、光电倍增管供电高压及工作电源电压的测量;以及在系统校正过程中通过单片机对主放大电路增益和能窗阈值的控制.并在文中分别给出了这两部分的应用原理图及单片机程序流程图.利用单片机对γ相机探测器系统的检测和校正大大提高了系统的可控性和可维护性.     

单片机外围接口电路

<正> 外围接口电路的原理 1.为什么要扩展外围接口电路? 单片机芯片已经具有了计算机的全部功能,也就是说,如果在最小系统下,一片单片机芯片接入少许外围电路(晶体振荡器、复位电路)就可以正常工作了。但是,在实际应用中,最小系统往往不能满足需要,通常会出现以下几种情况:(1)接口数不够。单片机的输出、输入接口数量不多,例如8031只有一个独立的8位口(P1口),89C2051也只有15条线可以作为接口,在许多情况下是不能满足需要的,这时就需要扩展接口电路;(2)部件量不够。单片机内部虽然已经具有计算机的主要     

基于8051单片机温度采集及无线发送

为了远程监控实时温度数据,利用温度传感器DS18B20的特点,与AT89C51单片机构成实时温度检测系统,并通过LED数码管显示。利用无线传输模块SRWF-1的特点,与单片机构成数据传输部分,将所测量的温度无线传输发送给上位机。给出了DS18B20,SRWF-J分别和AT89C51所构成系统的应用电路和部分程序。通过无线模块的引入,能较好地实现远程温度检测系统。     

12位串行模/数转换器ADS1286在温度检测中的应用

为了实现对温度检测的高精度要求,利用12位分辨率的微功耗A/D转换芯片ADS1286,配合AT89C2051单片机,对温度检测系统中的温度采集部分进行了硬件和软件设计。将该温度采集电路应用在气流式液相微萃取仪微型加热器的设计中,检测温度范围在0-350℃之间,温度检测精度达到±0.1℃。实践证明,该温度采集电路测量精度高,工作可靠稳定,适用于工业测控领域及智能化仪器仪表中对温度检测提出高精度要求的应用场合。     

浅谈单片机在温度监控领域的应用

一、前言单片机在电子产品中的应用已经越来越广泛,在很多的电子产品中也用到了温度检测和温度控制。随着温度控制器应用范围的日益广泛和多样,各种适用于不同场合的智能温度控制器应运而生。单片机的应用正在不断深入,同时带动传统控制检测技术日益更新。在实时检测和自动控制的单片机应用系统中,单片机往往作为一个核心部件来使用,而51单片机是各单片机种最为典型和最有代表性的一种。     

冷库单片机控制系统

利用单片机8031对中型冷库进行自动化改造，使得控制系统自动化程度大大提高，温度控制精确，节约了能源，提高了库存产品质量，降低了值班人员的工作强度。第1部分介绍了8031控制系统的组成，系统由8031单片机最小系统、人机对话系统、温度检测控制系统、执行单元组成；第2部分介绍电路的特点，对各部分单元电路做了简要介绍；第3部分介绍了系统软件、中断温度检测控制系统、按键处理中断系统的框图。     

基于DSP技术的两种陆基无线电导航系统机载设备的改装

为了更好的评估陆基无线电导航系统机载设备的性能，提出了应用DSP技术改装部分飞行检测系统的观点．在飞行检验陆基无线电导航设备的过程中，传统的飞行检测系统均是用模拟电路来实现的，但受温度和湿度变化及飞行抖动的影响容易产生测量误差，为了补偿这些误差就需要在飞行过程中进行定标．而基于DSP技术的飞行检测系统将不需要这一繁琐的过程．该系统最为关键的模拟处理设备就是一个模，数（A／D）转换器．该系统两种特别的用途：（1）ILS航道偏移量的测定；（2）VOR系统方位角的测定．此外，应用DSP技术改装的飞行检测系统还比较经济适用．     

单片机系统电路实现--单片机芯片烧录和印刷电路设计

为读者提供一个单片机系统设计和实现完整的框架，包括单片机系统设计PF810缟程器的使用，Protel 99SE软件、电路设计方法、技巧，通过系统电路实现，使读者掌握系统电路实现的知识，并可以运用这些知识，在电子技术开发中发挥作用。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.