基于STM32及LabVIEW的厨房环境监测系统

厨房是家居生活中一个活动很频繁的场所,其环境的好坏直接影响家人的安全和健康.对厨房环境参数的有效监测是目前智能餐饮领域中一个很重要的部分.基于此,提出了基于STM32及LabVIEW的厨房环境监测系统设计系统.系统以STM32作为下位机对厨房环境数据采集和处理,以PC机端的LabVIEW GUI软件作为上位机.下位机采...     

基于STM32的以太网通信模块设计

设计的以太网通信模块能够实现以太网通信功能,完成数据的收发功能。该系统是由基于STM32F407的处理器与基于CH395的以太网模块通过串行通信接口连接,PC机与基于CH395的以太网模块使用以太网接口连接,单片机STM32F407直接通过命令调用CH395自带的库函数,并采用CH395内置的TCP/IP协议栈把单片机配置成服务器,用上位机LabVIEW作为客户端与其进行数据通信。实验证明,基于STM32的以太网通信模块能实现数据传输且参数指标达到了设计要求。     

基于LabVIEW的地震救援队员自身安全系统的设计

文中设计一种基于LabVIEW的地震救援队员安全系统.系统包括用户端与监控端两部分,用户端由主控制器、GPS模块、无线LoRa模块、OLED显示模块、脉搏信号检测模块和按键报警电路组成;监控端由LoRa与上位机LabVIEW软件组成.用户端以STM32F103为控制核心,通过ADC采集脉搏信息,通过串口获取GPS信息,...     

Wi-Fi通信模块设计

设计的Wi-Fi通信模块,可以实现Wi-Fi和USB的双向传输。该Wi-Fi模块的设计分为硬件和软件设计两部分,硬件设计主要包含基于STM32F407的最小系统模块和基于ESP8266的Wi-Fi子模块。软件设计包括基于LabVIEW的GUI软件设计和ARM处理器的程序编写。测试表明:该系统可以完成数据的无损传输,并达到设计的预定功能。     

基于STM32的LF RFID阅读器研究

基于STM32的LF RFID识别系统,可以对电子标签卡进行检测、识别,并对识别的信息进行相应的处理。阅读器硬件由控制模块、功率模块、天线、检波电路和信号转换电路组成。控制模块以STM32为核心,利用STM32具有死区设置的互补PWM模块对MOSFET对管进行控制来实现天线的功率输出,同时利用STM32对检波后的信号进行捕获并解码。实际应用表明,该系统具有实现简单、可靠性高等特点。     

多参数空气质量检测系统设计与实现

针对空气质量监测问题,文章提出一种基于STM32的多参数环境监测系统。该系统用STM32F103作为主控芯片,并由温湿度传感器模块、PM_2.5模块、气体检测模块、数据显示模块、无线通信模块、云平台数据上传模块和手机端数据显示模块构成,基于I2C协议、串口传输、PWM脉冲捕获、模数转换等方法实现数据检测、处理及传输功能。试验结果表明,该系统能够准确检测空气中的温度、湿度、PM_2.5、一氧化碳、二氧化氮5种参数的变化数据,并将监测数据实时显示在检测终端、手机端和电脑端,具有实时监测多参数和远程监控的特点。     

基于ARM的多通道电荷放大器的设计与测试

针对基于压电传感器的结构健康监测系统特别设计了一16通道的程控电荷放大器板卡,由嵌入式微控制芯片STM32F407IGT6进行板卡的功能和状态控制。程控电荷放大器板卡包含驱动传感选择模块、电荷转换模块、无源滤波模块、二级放大兼微调模块、带通滤波模块及USB传输模块等,满足研制的电荷放大器具备的各项功能,同时具有体积小及集成度高等优点。板卡与上位机直接通过USB串口进行通信,上位机用户界面基于LabVIEW软件进行开发。     

基于NB-IOT的多参数智慧农业大棚系统设计

文章设计了一种基于NB-IOT(Narrow Band Internet of Things)的多参数智慧农业大棚系统。系统主要包括MCU(Microcontroller unit)核心处理器模块STM32、温湿度检测模块DHT11、光照度检测模块BH1750FVI、CO2检测模块CCS811和无线通信模块BC95。多个传感器传送信息到MCU核心处理器模块,STM32控制BC95入网,通过NB-IOT进行数据远程传输,最后通过云端软件实现多参量的远程监测和控制。系统结构简单,易实现、成本低,可实现农业大棚的远距离多点多参数监测。     

基于STM32的简易频率计设计

本设计基于STM32微控制器,可同时对1Hz至10KHz频率范围内的四路PWM信号的频率及占空比进行测量,并可同时产生在该频率范围内四路频率相同、占空比不同的可调PWM信号。构建量程自动匹配算法、按键扫描、定时器配置等软件程序,使用LCD液晶屏、按键等外设模块,采用Keil C51开发环境进行设计,通过仿真器和硬件下载测试,验证了本次设计的可行性。     

基于ARM平台的波形合成器技术的研究

文中设计了一个可产生任意波形的波形合成系统,系统的软件设计采用uC/OS-Ⅱ操作系统配合uC/GUI图形交互界面,基于直接数字频率合成原理进行C语言编程实现。系统硬件设计包括五大主干部分,即含有STM32F103ZET型号的ARM芯片的主控模块、用于显示和交互的TFTLCD彩屏、DAC波形处理模块、5V和3.3V双电源配置模块、用于与PC机互联的串口通讯模块。测试验证本设计系统可合成产生一定意义上的任意波形。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

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.     

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.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

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