共查询到17条相似文献,搜索用时 171 毫秒
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以往采用的大气电场探测方法需搭建独立的电场探测系统,并且主要实现空中矢量电场的一个或两个分量的探测。该文介绍了一种新型空中电场探测系统,基于气象部门现有L波段气象雷达探测系统,采用新型3维电场传感器,构建了新型空中电场探测平台,实现了空中3维电场、温度、湿度、气压等气象信息的同步实时探测。系统中电场传感器采用了独特的结构设计和信号处理电路,在30 kV/m的电场测量范围内,分辨力可达20 V/m,线性度优于1%,可以连续探测地面至15000 m高空的3维电场强度,为飞行器升空提供安全保障。 相似文献
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目前电场传感器只能探测电场强度矢量一维或者二维方向分量,尚无法精确地反映空中及地面电场强度大小。本文介绍一种新型三维电场传感器,由轴向、径向电场测量单元、驱动单元、电路单元、保温单元组成,用于探测空中及地面环境电场强度的三维方向矢量,克服了目前电场传感器探测电场强度时局限在一维或二维方向矢量的缺陷。在高空低温环境模拟试验中,当环境温度降到-50℃以下时,该传感器的保温单元使传感器内部温度一直处于零上,符合了电路板工作温度范围。在实际电场测试试验中,该传感器的电场测量单元验证了输出信号与电场之间的线性关系,与理论分析相符,证明了三维电场传感器的合理性。 相似文献
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用于测量工频强电场的集成光学电场传感器 总被引:2,自引:2,他引:0
针对工频强电场测量的特点,研究了用于测量高压工频电场的集成光学电场传感器。分析了集成光学电场传感器的工作原理,以及电场传感系统的输入输出性能。设计并实现了工频电场的测量校准装置,对从100V/m到2500V/m的工频电场进行了测量。测量结果表明,这种集成光学电场传感器适合于高压工频电场的测量。 相似文献
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该文基于MEMS电场敏感芯片,研制出了一种新型的地面大气电场传感器,解决了现有场磨式电场仪易磨损、功耗大、故障率高等问题。敏感芯片采用SOIMUMPS加工工艺制备,其芯片面积仅为5.5 mm5.5 mm。该文提出了传感器敏感芯片的弱信号检测方法,设计出了满足环境适应性的传感器整体结构方案,并建立了传感器的灵敏度分析模型。对电场传感器进行测试,测量范围为-50 kV/m~50 kV/m,总不确定度为0.67%,分辨力达到10 V/m,功耗仅为0.62 W。外场试验结果表明,MEMS地面大气电场传感器在晴天和雷暴天的电场探测结果,与Campbell公司场磨式电场仪探测结果都有较好的一致性,说明该传感器能满足预测雷暴要求,实现雷电监测和预警功能。 相似文献
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本文提出了一种非常有发展前途的低温漂固态电场传感器。此传感器是一种恒压惠斯顿电桥,它的电阻是由四个直接栅极SOI MOSFET器件。理论上证明这种传感器的输出信号电压与测量电场成正比,温度漂移等于零。实验结果表明,在300K温度下,传感器的分辨率为3.27 mV/KV/m,大气环境下的温度漂移相当于47V/m的电场,其远小于大气温度下相当于10,000V/m的电流漂移。 相似文献
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A novel low temperature solid state electric field sensor is demonstrated as a promising sensor. The sensor is a type of constant voltage Wheatstone bridge whose resistors are four direct gate SOI MOSFET devices. It is demonstrated in theory that the output voltage signal is proportional to the electric field E, the temperature drift is about zero when the temperature is in the range from 200 to 400 K, and the doping concentration is in the range from 1×1014 to 1 × 1016 cm-3. The experiment results indicate that the resolution of the sensor is about 3.27 mV for a 1000 V/m electric field at 300 K, and the voltage drift by an amount is about 47 V/m field signal when the degree temperature is in the range from 300 to 370 K, which is much smaller than the current drift of a single MOSFET which is about 10000 V/m field signal. 相似文献
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Wen Xiaolong Peng Chunrong Fang Dongming Yang Pengfei Chen Bo Zheng Fengjie Xia Shanhong 《电子科学学刊(英文版)》2014,31(2):143-150
This paper presents a high performance electric field micro sensor with combined differential structure. The sensor consists of two backward laid micro-machined chips, each packaged by polymer and metal. The novel combined differential structure effectively reduces various environmental affections, such as thermal drift, humidity drift and electrostatic charge accumulation. The sensor is tested in near-ground place as well as balloon-borne sounding. In different weather conditions, the measureinent results showed good agreement with those of the commercial electric field mill. 相似文献
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The mobility of electrons and holes in silicon depends on many parameters. Two of them are the electric field and the temperature. It has been observed previously that the mobility in the transition region between ohmic transport and saturation velocities is a function of the orientation of the crystal lattice.This paper presents a new set of parameters for the mobility as function of temperature and electric field for 〈1 1 1〉 and 〈1 0 0〉 crystal orientation. These parameters are derived from time of flight measurements of drifting charge carriers in planar p+nn+ diodes in the temperature range between −30 °C and 50 °C and electric fields of 2 × 103 V/cm to 2 × 104 V/cm. 相似文献