借助FPGA器件实现对IM1227单相互感式计量模块控制部分的设计,从而实时完成相应电能参数的测量.设计的通信连接使用带有铜网的屏蔽双绞线,通过RS485接口完成测量数据的传输,数据通信遵循MODBUS-RTU规约.实验应用VHDL语言完成了数据的发送、接收、校验及处理等模块设计,可将测量的电能参数数据直接读取并显示.该实验测量数据准确,现象明显,取得了良好的实验效果.

针对无线传感器网络的安全性问题,基于动态防御技术提出了一种具备多种安全策略的主动式防御安全模型.通过分析无线传感器网络的研究现状与安全需求,选取适当的安全策略和技术,建立基于动态防御技术的无线传感器网络的安全模型.利用NS2软件和MATLAB软件对基于动态防御技术的安全模型进行仿真,统计和分析无线传感器网络的节点在多种模式下接收数据量.仿真结果表明,与经典群密钥算法相比,所提出的安全模型具有更加优秀的安全性能和通信性能.

随着电力大数据时代的到来,数据量的骤增使得维护决策者所面临的决策环境与决策问题变得愈发复杂.针对这一问题,在云计算技术和设备状态维护技术的基础上,对云平台下的设备状态维护系统进行研究,构建基于云计算的全维度设备状态维护系统整体框架,并建立系统维护模型,针对遗传算法在求解实际问题时,计算能力难以满足人们需要的不足,引入Map Reduce技术,结合遗传算法和Map Reduce技术进行并行设计,并通过对比实验分析系统性能,此研究工作为我国电力设备状态维护系统的发展提供了参考和借鉴.

基于柔性导电织物设计一种工作于2.45 GHz的柔性可拉伸天线,并研究不同拉伸应变对柔性织物天线性能的影响规律及辐射特性.仿真及实测结果表明,在中心频率2.45 GHz处,回波损耗的仿真与实测值分别为-40,-26 dB,仿真与实测增益方向图在中心频率处一致性良好.

基于柔性织物基体石墨烯/聚苯胺填充PDMS制备柔性导电复合材料,提出一种工作于2.45 GHz的柔性织物天线,旨在提升人体中心通信系统中柔性天线的穿戴舒适性.阐述柔性织物天线的拓扑结构、制备流程及性能特点,通过尺寸优化可实现2.45 GHz中心频率处实测回波损耗为-22.6 dB,-10 dB带宽为165 MHz,增益方向图与仿真结果保持良好的一致性,同时,建立的天线接近人体模型,研究了天线距人体组织不同位置处SAR值及辐射性能.提出的柔性织物天线及制备方法为可穿戴设备无线通信中柔性天线的设计提供了一种解决方案.

We gave topology and preparation process of a 2.45 GHz and 5.8 GHz flexible wearable monopole dual-band antenna based on polydimethylsiloxane (PDMS)flexible substrate and organo-silicone conductive silver adhesive.The structure of the flexible dual-band antenna was optimized and the performances of the antenna were characterized.The results show that the experimental results are in good agreement with simulation results.The return losses of the dual-band antenna at the center frequency of 2.45 GHz and 5.8 GHz are -26 dB and -28 dB,respectively.

为实现法向力与切向力感知,设计了一种可用于机器人仿生皮肤的电容式柔性触觉传感器,并设计成阵列结构.以硅橡胶为柔性基体,有机硅导电银胶为上下两柔性极板,共同构成电容式触觉敏感单元.分析并介绍电容式柔性触觉传感器的工作原理、结构设计及触觉信息采集与处理系统.可实现法向力0～5N范围内灵敏度为6.78 fF/N,切向力0～3N范围内灵敏度为11.45 fF/N的触觉感知功能.试验结果表明,该全柔性电容式触觉阵列传感器具有良好的稳定性与灵敏度,可用作人工皮肤实现触觉感知.

提出了一种用于智能机器人仿生皮肤的电容式滑觉传感器,用以解决智能机器人软抓取过程中滑觉信息的感知问题.阐述了电容式滑觉传感器的结构设计、滑觉感知机理,并借助ANSYS有限元仿真软件进行滑觉感知机理验证.基于CC2530低功耗微处理器与AD7147-1型电容数字转换器构建便携式电容滑觉信息感知系统.根据差分电容式滑觉传感器的输出可实现全方向性滑觉力检测功能.实验结果表明:该电容式滑觉传感器具有结构简单、设计合理、加工制作方便、成本低且高灵敏度等优点.

鉴于传统的预防性试验和事后维修不能满足高压电气设备绝缘检测的要求,介绍一种基于DSP的高压电气设备绝缘在线监测系统的开发.

In order to solve wiring cumbersome and detection's low efficiency of the taxi meter verification equipment,we introduce a design method for the taxi meter's calibration device whose core is AT89C51 singlechip microcomputer. Hall sensor as its detecting element produces the pulse signal which is transmitted to the wireless receiving module connected to wireless module of the microprocessor. Then it compares the pulse number from taxi's meter records to check the taxi meter according with charge standards or not. Moreover,the system improves the design of the test bench to make it be more quick and convenient in the process of detection.It also improves the service life as well as detection efficiency of the test bench. Through the experiment testing in accordance with the technical indicators of the meter taxi vehicle prover requirements,the system Convenient operation has some advantages,such as convenient high accuracy,and good stability,which can satisfy the need of actual test.

为了提高乐器调音、定音的速度和准确度,设计了便携式电子校音器.文中介绍了基于单片机的电子乐器校音器的设计方法,主要阐述了信号采集、放大和显示电路的构成和软件设计思路.利用单片机的数据处理功能,实现对乐器所发音阶频率的智能测量和基准音频比较,通过LCD12864显示相应的频率值和音分差,从而为人工调谐提供依据.研究表明,装置具有测量准确、方便易用等优点,有很好的推广价值.

The low frequency pulse has a various significant application in the fields of physiology and therapy for the human being,especially in aspects of reducing muscle soreness and relieving stress. Currently,the electrical stimulation therapy treatment instrument has been widely used in clinical and obtained superior therapeutic effect. A friendly man-machine interface,portable bio-electrical pulse therapy instrument was presented in this paper,which could generate a pulse wave with the function of amplitude adjustable from 1 to 90 V,frequency between 0. 1 and 200 Hz and pulse width in the range of 0. 1 to 5 ms based on the ATmega16 microprocessor internal PWM function and filter,power amplifier,booster circuit. The bioelectrical pulse could simulate different stimulatory effects of acupuncture,massage and others realistically.

Digital signal has been the chief processing signal in the field of modern controlling because it has a series of advantages such as strong anti-interference,noise-free accumulation and easy to store,process and exchange.There are many applications in requirements to change the cycle of the pulse signal,duty cycle and the module of output pulse controlled.This paper discusses a method to finish these works based on the FPGA.We increase the cycle of the output signal range and accuracy by using clock management module;call IP core to complete the appropriate math problems;control the duration of each cycle of high and low by using two controllable down counter;counter the output and control the output.The design achieves a good result on the chip made of ALTERA company and it has the feature of flexibility.

A simulative sine wave method with adjustable magnitude and frequency realized with FPGA devices in PWM mode was introduced.By this method,when generating a signal with some frequency,the sampling pulse period keeps constant while the duty ratio can make corresponding adjust.In practice,the sine wave table is computed firstly offline and the duty ratio is changed once in one sampling period according to the law of sine wave.Hence,the output signal is transformed to sine wave after the high-order harmonics are filtered by the filtering circuit.The output signal thus realized with programmable chips is smooth with good stability and easy to adjust relevant parameters.Compared to conventional method,it has higher frequency resolution and easy to carry out the numerical modulation of frequency,phase and magnitude of the signal.In PWM mode,the signals from processor to controlled system are all in digital form and no digital-analog conversion are needed.For the improved anti-interference capacity of signals,this method can widely be used in many areas such measurement,communication and power control and conversion.

Keys were the common elements during the research of measure instrument,electronic apparatus,and design of the electronic.The bounce phenomenon of keys was the objective problem in the digital system design.Therefore,the shaking release measurement was necessary.That is to remove the noise signal at the engine bounce through the eliminating the shaking circuit in order to ensure the right response of the circuit.The paper introduced two methods of eliminating shaking on FPGA and gave the relative VHDL code and the imitating picture.It resolved the influence of engine shaking on keys and ensurd the steady working of the circuit.

Frequency division is one of the most common circuits in the design of digital system. The design of clock is often needed. This paper presents the design principle of a digital divider with any number divide ratio which can divide the frequency of basic frequency.

The device is center on 89C51 single chip computer and it can examine malfunctioncable communication. It has two functions that are examining malfunction and sending out thechecking signal. It can automatic rectify,measure and intelligently analyze all kinds ofmalfunction and realize position of malfunction out of human manipulation little intensity.The instruments can automatic examine lots of malfunction in tandem. Overall,it has beencapable of strong interference opposing and wide range of working voltage.