Miniature Fabry-Perot interferometric sensor for temperature measurement based on photonic crystal fiber

A novel miniature Fabry-Perot interferometric (FPI) temperature sensor is proposed and demonstrated experimentally. The modal interferometer is fabricated by just splicing a section of photonic crystal fiber (PCF) with a single-mode fiber (SMF). The air holes of the PCF are fully collapsed by the discharge arc during the splicing procedure to enhance the reflection coefficient of the splicing point. The transmission spectra with different temperatures are measured, and the experimental results show that the linear response of 11.12 pm/°C in the range of 30–80 °C is obtained. This sensor has potential applications in temperature measurement field.     

A temperature sensor based on the splicing of a core offset multi-mode fiber with two single mode fibers

In this paper, a temperature sensor based on the splicing of a core offset multi-mode fiber with two single mode fibers is proposed and demonstrated experimentally. The temperature sensing principle is analyzed and related experiment is performed. By controlling the core offset and splicing length of the specialty multi-mode fiber (SMMF), two sensors with different temperature sensing properties are obtained, and experimental results show that the temperature sensitivity can be up to 48.76 pm/°C in the range of 25—95 °C. Moreover, it has many advantages, including small size, high sensitivity, and simple structure. So it can be used in potential temperature sensing applications, such as industrial production, biomedical science, power electronics, and so on.     

浅析电子技术在新型汽车工业中的应用

随着汽车工业的发展，电子技术在现代汽车上应用越来越广泛，电子技术的应用对于改进汽车性能、提高行驶安全、降低污染、节约能源有着非常重要的作用。文章就汽车电子技术应用、发展趋势及应用前景进行了综述。     

基于电力载波的远程电能抄表系统的设计

本文设计了一种基于低压电力线通讯技术的远程电能抄表系统，该系统采用低压电力线作为通信信道，不必另外架设通信电缆，能够大大节省投资。本文叙述了系统的结构和功能，以及软、硬件设计方案，并给出了部分原理框图。该系统成本低、可靠性高、稳定性好、应用前景较好。     

基于光散射的分布式光纤温度传感器网络及其在智能电网中的应用

介绍了基于光散射的分布式光纤温度传感网络的研究现状和发展趋势,主要阐述了基于瑞利散射、喇曼散射和布里渊效应的分布式光纤传感器的工作原理。在此基础上重点介绍了其在高压电缆、电力线沿线温度测量中的应用情况,探讨了传感光电缆替代原有的电缆和光缆,使光通信、电力传输、传感三合一的趋势。     

基于通信信道的数字传感信号正交幅度调制技术仿真研究

介绍了数字传感信号接入通信网时的正交幅度调制、解调和判决原理,在Optisystem7．0环境下设计并对改进的正交幅度调制系统进行了建模与仿真,观察并分析了原始输入信号、调制信号、解调信号,验证了数字传感信号在通信信道中传输的可行性。     

一种低成本解调系统的双光栅电压传感器

设计了一种由2×2和3×3耦合器构成的M-Z干涉仪，并成功应用到所设计的光纤光栅电压传感器解调中。与其他电子式、光学电压传感器相比较，基于2×2和3×3耦合器构成的M-Z干涉仪解调的光纤光栅电压传感器系统结构简单、价格优廉。此系统通过2根不同波长的光纤光栅分别对温度和电压进行测量。测量结果表明，此系统在50 V到450 V之间线性度比较好，消除了光纤光栅温度交叉敏感的问题，使得测量的结果更加准确，能够满足电力系统测量的要求。     

光纤Fabry-Perot干涉式温度的测量

介绍了一种新型的光纤温度传感器,它基于Fabry-Perot白光干涉原理,可对温度进行绝对测量.它除了具有普通光纤温度传感器的优点以外,还具有稳定性高、抗干扰能力强的特点,并可实现商品化、实用化.     

神经元的对称开关电容电路实现

提出对称开关电容实现人工神经 ，从而精确实现高精度稳定的集成电阻。     

电子式电流互感器高压端供能电源的设计

电子式电流互感器(Electronic Current Transform,简称ECT)在电力系统中具有广泛的应用前景,但为其高压端供能的电源是研究的难点,一直制约着有源电流互感器(CT)的应用.在此,设计了一种改进的供电方案--交直流结合供电方案,即小CT母线电流取能和储能电池相结合供电.介绍了该方案的供能原理,并进行了具体的设计和实验.实验证明,该电源方案能在母线电流很小或断电的情况下为CT高压端电源提供不小于250mW的功率,而且能在大电流情况下.提供稳定电压,保护后续变换电路,有效解决了母线取能供电存在的技术难点.