基于语音识别的智能家电控制系统设计

阐述基于语音识别的智能家电系统的设计,系统以微处理器STC89C51单片机为核心,采取LD3320语音识别模块识别语音命令,将识别之后的指定命令通过无线模块发送家电控制端的无线接收模块,接收之后单片机控制家电来完成指定命令的动作,从而达到想要的结果,控制家用电器做出相应的动作。实验验证表明,此系统设计达到了预设的结果,具有快速识别、携带便捷等优势,从而实现通过语音技术来控制家用电器的功能。     

基于CPLD和VS1011E解码器的电梯语音系统设计

目前,大多数电梯楼层语音系统都采用专门语音器件,但缺陷多。针对这种情况,设计了一种基于CPLD和VS1011E解码器的电梯语音系统,该系统主要采用STC89C58RD＋C、CPLD、VS1011E和Flash技术,控制器按照输入的信息,向CPLD发出控制命令和传送数据,CPLD根据接收到的命令按照逻辑规则读写Flash并对MP3设定内部控制寄存器和传送音频数据,MP3输出的模拟信号直接驱动外接功率放大器,实现了电梯语音服务的智能化和自动化。     

远程无线网络语音通信控制系统设计

由于语音通信受环境的影响较大,导致传统的语音通信控制系统无法满足用户需求,控制质量较低。因此,构建远程无线网络语音通信控制系统,系统中的语音识别模块利用CG6565语音卡进行语音信号的收集,并对其进行降噪处理。降噪后的语音信号被转换成便于处理的数字信号,并将数字信号的特性参数提取出来。语音识别模块对特性参数进行识别、调整和测量后组成语音文件夹,并将语音文件夹反馈到远程无线网络控制模块。远程无线网络控制模块对语音文件夹中的语音文件进行一系列的处理,处理后的语音文件被传输到用户手中,实现系统对用户设备的远程语音控制。软件给出了语音通信信号的目标函数,以及该目标函数的调用代码。实验结果表明,所设计的系统具有较高的控制效率和控制准确率,控制质量总体较高。     

回转式压电微角度电动机的反馈控制系统设计

介绍了一种采用"推拉接力原理"设计的压电微角度电动机.通过TMS320LF2407型数字处理芯片(DSP)产生6路方波,将其中两路转换成三角波与两路方波相匹配作为四路控制信号.采用直流放大驱动电源将控制信号放大驱动压电电动机,电动机通过圆光栅检测回转角度并把检测值传递给数字处理芯片,从而进一步调整输出的控制信号.整个系统实现闭环控制,同时实现压电微角度电动机的匀速连续转动.电动机的最小单步角位移可达2″.     

手机蓝牙控制的智能车系统设计

设计了一种通过手机蓝牙实现对车载控制的系统.该系统由带蓝牙功能的智能手机和车载控制系统组成,车载控制系统通过蓝牙模块HC-06与智能手机建立蓝牙通信,并将蓝牙信号转换成串口信号,车载控制系统以STM32F103作为主控芯片,接收蓝牙模块传送的信号,驱动电机做相应的动作.在Android手机上开发应用软件,通过设计的按钮实现对车的停启和转动控制,另外通过滑动条实现对车的速度控制.该系统充分利用了智能手机触摸屏的灵活的操作功能,另外车载系统端的STM32F103处理器所带的PWM功能实现了对车的便捷调速功能.     

基于15693协议的射频识别读卡器的设计

设计了基于15693协议的射频识别读卡器系统。该系统以RC-632芯片为主控芯片。标签天线将磁场能量转换成电流,激活射频芯片并维持工作,然后接收读写器发出的命令,射频天线芯片作出应答。标签天线通过其本身负载的变化将标签信息反向调制在读卡器的天线上,经读写器天线传送到读写器,读写器对接收的信号进行解调和解码,最终将解码后的信息送到上位机系统。上位机处理器根据逻辑运算判断该卡的合法性,针对不同的设定作出相应的处理和控制,发出指令信号控制执行机关动作,从而实现读卡的功能。     

基于Android的便携式票卡分拣系统设计与实现

票卡的分拣在自动售检票系统中有着十分重要的作用,传统的方式是使用票卡编码分拣机实现票卡分拣,成本高且系统庞大臃肿.本文基于Android和STM32F4,设计了一种便携式分拣系统,该系统以STM32F4为主控单元,操作人员通过Android APP向主控单元发送控制命令,APP与主控单元通过蓝牙通信实现数据传输,主控单元接收APP的控制命令并经过处理后,通过串口驱动票卡分析与分拣模块,完成对票卡的分析和分拣操作,分析与分拣结果可以通过APP上传到云端服务器,实现分拣结果的集中处理.     

具有液晶显示及语音提示功能的智能电动车设计

为实时获取智能电动车的状态信息,将液晶显示器及语音芯片应用于智能电动车系统。智能电动车由两个模块组成:电动车模块和无线控制模块。无线控制模块向电动车发送命令,电动车依据接收到的命令动作。无线控制模块在发送命令的同时,将命令信息实时显示在液晶显示器上,并通过语音芯片发出语音提示。语音提示部分同时具有现场重录功能。在概要介绍系统组成的基础上,着重分析了液晶显示及语音提示的设计,最后给出了无线控制模块实物图。实际系统运行结果表明,液晶显示和语音播放与无线发射命令同步,语音模块现场重录功能便于实现。     

小型机器人关节控制电路系统的关节位置信息采集和闭环定位控制实现

提出一种小型机器人关节位置信息采集及定位控制系统的设计方法,设计方案包括硬件设计和软件设计,核心处理器采用意法半导体32位单片机STM32,采用CAN总线接收上位机的命令,实现传感器信息采集的反馈。通过双相DMOS全桥驱动电路芯片,结合PID算法实现空心杯直流电机的一种高精度闭环定位控制。选取AS5054磁旋转编码器实现关节位置信息的采集,以控制关节角度转动误差,进而实现闭环定位控制过程。实验表明,系统软硬件与小型机器人转动关节对电路系统控制的实用要求相符合。     

应用于海洋观测的TDI-CCD驱动电路的设计

面阵CCD及线阵CCD不能胜任海洋目标观测的要求,选用具有高信噪比高灵敏度的时间延迟积分CCD(Time delay integration CCD, TDI-CCD)作为 探测器并实现其驱动电路。在图像采集过程中,TDI-CCD探测器使用两个读取端口输出。 该探测器驱动电路产 生TDI-CCD和A/D的驱动时序。CCD的模拟输出信号被A/D采样,转换成可被计算机识别 的数字信号。采用FPGA作为主控芯片,产生驱动时序,接收被A/D转换过的数字信号, 并发送图像至计算机。利用相关双采样(Correlated double sampling, CDS)技术滤除TDI-CCD模 拟输出信号的相关噪声,提高信号的信噪比。现场可编程门阵列(Field programmable gate array, FPGA)代码在ISE14.7下进行仿真,实验表明,研制的TDI-CCD驱动电路能够产生CCD要求的驱动时序。     

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.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

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.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

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.