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光纤陀螺传感线圈及绕法 被引量:7
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作者 赵勇 刘军 +1 位作者 张春熹 刘海涛 《半导体光电》 CAS CSCD 北大核心 2002年第5期312-314,共3页
通过对温度梯度对光纤陀螺传感线圈影响的分析 ,结合几种光纤传感线圈的绕法 ,简要说明了不同绕法的光纤传感线圈对温度梯度的抑制效果。
关键词 光纤传感线圈 相位漂移 温度梯度
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三维磁特性测试系统中激磁与传感结构的校准与补偿 被引量:4
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作者 耿鑫 李永建 王利祥 《电工电能新技术》 CSCD 北大核心 2018年第4期77-82,共6页
电工材料三维磁特性测量研究中,传感线圈的校准是磁性材料磁特性精细模拟的关键问题。本文研发了一种高精度B-H复合型传感线圈,并提出了传感线圈系数的张量模型。基于此,设计了系数校准的螺线管仿真实验,根据仿真结果对校准螺线管的尺... 电工材料三维磁特性测量研究中,传感线圈的校准是磁性材料磁特性精细模拟的关键问题。本文研发了一种高精度B-H复合型传感线圈,并提出了传感线圈系数的张量模型。基于此,设计了系数校准的螺线管仿真实验,根据仿真结果对校准螺线管的尺寸和实验系统进行了优化。与此同时,提出了直流激磁模型,其与交流激磁时的对比可进一步筛选出传感线圈精确的系数校准值。为进一步减小实验误差,提出了一套偏差角补偿方案。结果表明,地磁场会对直流激磁模型产生一定影响。 展开更多
关键词 三维磁特性 传感线圈 张量系数模型 直流激磁 偏差角补偿
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磁性材料三维磁特性中新型传感结构的优化设计
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作者 耿鑫 李永建 《仪表技术与传感器》 CSCD 北大核心 2018年第7期7-10,101,共5页
电工材料电磁特性的精细模拟是决定电机、变压器等电工设备电磁场分析与损耗计算的关键因素之一。为了全面地分析材料的磁特性,提出了三维磁特性测量方法。考虑到由于样品更换而造成机头偏转,研发了一种高精度的B-H复合传感线圈和带匀... 电工材料电磁特性的精细模拟是决定电机、变压器等电工设备电磁场分析与损耗计算的关键因素之一。为了全面地分析材料的磁特性,提出了三维磁特性测量方法。考虑到由于样品更换而造成机头偏转,研发了一种高精度的B-H复合传感线圈和带匀场极靴的传感结构,并对传感线圈进行系数校准和无功补偿。基于此,对比分析了在考虑谐波条件下的无取向硅钢片(35WW270)和取向硅钢片(27ZH95)的磁特性和损耗特性,结果表明:取向硅钢片的各向异性更加显著。 展开更多
关键词 三维磁特性 传感线圈 系数校准 谐波 损耗
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考虑传感结构中气隙的电工钢片三维磁特性研究
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作者 耿鑫 李永建 +1 位作者 杨克为 郭栋 《仪表技术与传感器》 CSCD 北大核心 2018年第5期16-19,共4页
为了全面分析材料的磁特性,提出了三维磁特性测量方法。考虑到硅钢片叠片方向的磁场不均匀性,设计了一种新型的高精度B-H复合传感线圈。并针对三维磁特性传感信号的精度问题进行了深入研究,提出了一套改善信号精度的方案。采用新型线圈... 为了全面分析材料的磁特性,提出了三维磁特性测量方法。考虑到硅钢片叠片方向的磁场不均匀性,设计了一种新型的高精度B-H复合传感线圈。并针对三维磁特性传感信号的精度问题进行了深入研究,提出了一套改善信号精度的方案。采用新型线圈和补偿方案,讨论了在空间球形的激磁模型下,无取向硅钢片(35WW270)的三维磁特性和损耗特性。 展开更多
关键词 电工钢片 三维磁特性 传感线圈 各向异性 损耗
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软磁复合材料的三维磁特性检测实验研究 被引量:17
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作者 李永建 杨庆新 +2 位作者 安金龙 赵志刚 朱建国 《电工技术学报》 EI CSCD 北大核心 2012年第9期160-165,共6页
传统的一维和二维测量方法不能全面解析磁性材料的磁特性,本文研究了一种新型的三维磁特性检测方法,能更好地理解磁化过程并准确分析材料磁心损耗特性。设计了三维磁特性测试装置并测量了软磁复合(SMC)材料在旋转励磁条件下的三维磁特性... 传统的一维和二维测量方法不能全面解析磁性材料的磁特性,本文研究了一种新型的三维磁特性检测方法,能更好地理解磁化过程并准确分析材料磁心损耗特性。设计了三维磁特性测试装置并测量了软磁复合(SMC)材料在旋转励磁条件下的三维磁特性;详细分析了磁特性实验中新型B-H传感线圈的校准、补偿和B、H矢量的精确计算等问题;根据实验结果分析并讨论了三维磁滞特性和磁心损耗特性等。 展开更多
关键词 软磁复合材料 三维磁特性测试仪 各向异性 磁心损耗 传感线圈
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电涡流式锚杆探测仪的研究
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作者 徐乐年 邓铁六 赵振远 《煤炭学报》 EI CAS CSCD 北大核心 1996年第5期487-490,共4页
依据电涡流式探测原理,建立了金属探测的数学模型,为锚杆探测仪参数的选择提供了理论依据。锚杆探测仪采用单片机测量振荡器的振幅和频率,控制振荡器振幅和发光二极管的指示。实现了仪器的智能化,解决了锚杆和金属网的分辨问题。
关键词 锚喷支护 电涡流 传感线圈 振荡器 锚杆探测仪
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无源谐振器在电涡流位移传感器中的谐振增强效应 被引量:3
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作者 刘存跃 董永贵 《清华大学学报(自然科学版)》 EI CAS CSCD 北大核心 2012年第11期1607-1610,共4页
在两只同轴电磁耦合线圈之间插入一只无源谐振线圈,可利用谐振耦合显著提高能量传输效率。为探索这种谐振增强效应在传感器领域的应用可能性,制作了一只与测量电路无任何引线连接的、由电感线圈及电容串联组成的无源LC谐振器,放置于电... 在两只同轴电磁耦合线圈之间插入一只无源谐振线圈,可利用谐振耦合显著提高能量传输效率。为探索这种谐振增强效应在传感器领域的应用可能性,制作了一只与测量电路无任何引线连接的、由电感线圈及电容串联组成的无源LC谐振器,放置于电涡流位移传感器探测线圈与金属目标靶间的测量通道中。实验结果表明:当传感器工作在该谐振器的谐振频率点附近时,有效探测距离和灵敏度会得到显著增强。进一步针对发射-接收式双线圈位移检测系统进行了实验,结果同样证实了无源LC谐振器介入后的谐振增强作用。该结论对于其他带有电感耦合线圈的传感系统同样具有参考价值。 展开更多
关键词 传感线圈 谐振耦合 电涡流 位移 电磁
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浙江双箭开发输送带新产品
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《特种橡胶制品》 2008年第1期40-40,共1页
浙江双箭橡胶股份有限公司根据市场需求,每年都有高技术产品问世。2007年该企业开发了新产品智能型防撕裂输送带和节能型输送带。前者预埋置了传感线圈,能有效防止输送带的撕裂,已审报5项专利;后者通过调整配方,把工作面橡胶和非... 浙江双箭橡胶股份有限公司根据市场需求,每年都有高技术产品问世。2007年该企业开发了新产品智能型防撕裂输送带和节能型输送带。前者预埋置了传感线圈,能有效防止输送带的撕裂,已审报5项专利;后者通过调整配方,把工作面橡胶和非工作面橡胶材料的摩擦系数定为不同数值,减少了摩擦阻力,达到了节电的目的。 展开更多
关键词 高技术产品 输送带 开发 浙江 橡胶材料 市场需求 传感线圈 摩擦系数
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两种视频检测系统对比应用分析
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作者 段立桥 《中国交通信息产业》 2006年第11期52-54,共3页
河北省交通厅项目办所辖的京秦高速公路原采用埋于路面下方的传感线圈检测器,经过几年时间的运营,其功能已经远远不能满足日新月异的管理需要。为此,河北省交通厅项目办在京秦高速公路秦皇岛-北戴河段进行了视频检测系统的尝试性建设。
关键词 视频检测系统 京秦高速公路 传感线圈 交通厅 河北 检测器
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光纤陀螺
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《光机电信息》 2001年第4期58-58,共1页
关键词 光纤陀螺 KVHIndustries公司 方向耦合器 偏振器 传感线圈
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CA6102发动机无触点点火系统的使用与检修
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作者 赵荣林 《汽车运用》 1996年第3期28-29,共2页
无触点点火系统具有点火能量大、起动可靠、混合气燃烧充分、排气污染小、不必打磨触点和调整间隙等优点,国产引进小轿车大都采用这种装置,CA6102发动机也改为磁电式无触点点火系统,但有的用户认为此系统工作不可靠,又改装传统的点火系... 无触点点火系统具有点火能量大、起动可靠、混合气燃烧充分、排气污染小、不必打磨触点和调整间隙等优点,国产引进小轿车大都采用这种装置,CA6102发动机也改为磁电式无触点点火系统,但有的用户认为此系统工作不可靠,又改装传统的点火系统,其实,只要正确地使用并掌握故障诊断的步骤方法,就能逐步适应该装置,使其优势得以充分发挥。 展开更多
关键词 无触点点火 分电器轴 发动机 点火线圈 跳火 点火系统 分电器盖 压阻 传感线圈 高压线
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Design of ground-airborne TEM three-component air-core coil sensor 被引量:5
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作者 YUAN Shao-ye LIN Jun +2 位作者 SONG Shuang SUN De-li TENG Fei 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第1期28-37,共10页
Transient electromagnetic method (TEM),as a non-seismic geophysical exploration mainstream electromagnetic method,is widely used in oil,gas,mineral and other underground resources exploration areas. The coil sensor is... Transient electromagnetic method (TEM),as a non-seismic geophysical exploration mainstream electromagnetic method,is widely used in oil,gas,mineral and other underground resources exploration areas. The coil sensor is generally used to collect data. In view of the problems of incomplete information of the abnormal body and the data loss in the existing TEM single-component coil sensor,a three-component TEM coil sensor is designed. By analyzing the relationship between sensor sensitivity and coil structure parameters,the coil structure and turns are designed. By analyzing the frequency response characteristics of the TEM magnetic field sensor,the signal distortion is reduced by using the under-damped matching mode. By analyzing the distribution of various noise sources of the magnetic sensor,the appropriate amplifier is selected to reduce the background noise. Finally,a three-component TEM induction magnetic field sensor is designed. The weight of the sensor is controlled at 3.2 kg and the working frequency is 10 mHz-10 kHz. The background noises of X and Y components probably keep in 1.5×10^-8 V/ Hz and sensitivities are 8.4 and 9.8 nT/s,respectively,the background noise of vertical component is 2.1× 10^-7 V/ Hz and sensitivity is 18.5 nT/s. Compared with the existing single-component TEM receiving magnetic field sensor,the designed sensor realizes the signal acquisition of three components. Without too much increase in volume and total weight,it improves the sensitivity of the sensor and reduces the background noise,thus the signal-to-noise ratio (SNR) of the signal is improved. 展开更多
关键词 transient electromagnetic method (TEM) three-component air-core coil sensor under-damped matching noise analysis
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Design and optimization of vector coil sensor suited to magnetometric resistivity method 被引量:1
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作者 SONG Shuang SUN De-li +1 位作者 CHEN Chao TENG Fei 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2020年第1期45-53,共9页
Magnetometric resistivity(MMR)method is a new way to detect dam leakage.The coil sensor is generally used to collect data in geophysical exploration methods.Given the characteristics of accurate vector data requiremen... Magnetometric resistivity(MMR)method is a new way to detect dam leakage.The coil sensor is generally used to collect data in geophysical exploration methods.Given the characteristics of accurate vector data requirements and high sensitivity requirement,a three-component MMR air-core coil sensor is designed.Through the analysis of sensor sensitivity and coil structure parameters,the coil structure and turn number are designed.By analyzing the noise source of the sensor,a suitable amplifier is selected to reduce the background noise of the system.Through the analysis of the three-component non-orthogonal angles,the parameters of the non-orthogonal angles of the coils are corrected.Finally,a three-component MMR induction magnetic field sensor is designed.The volume of the sensor is controlled at 0.027 m 3.The background noise of X、Y and Z are 5.030435 nV/Hz@380 Hz and magnetic field sensitivities are 0.18995 pT/Hz@380 Hz.The three channels have good consistency,and the three-component nonorthogonal angles correction error of three components is controlled within 0.2%. 展开更多
关键词 magnetometric resistivity(MMR) three-component air-core coil sensor noise analysis high sensitivity three-component correction
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Middle range wireless power transfer systems with multiple resonators 被引量:1
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作者 陈新 张桂香 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第6期2127-2136,共10页
The equivalent two-port network model of a middle range wireless power transfer(WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, re... The equivalent two-port network model of a middle range wireless power transfer(WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, resistance, parasitic capacitance, mutual inductance and S-parameters of coils & resonators were analyzed. The impedance matching method was used to optimize load power and transmission efficiency of the multi-resonator WPT system, and the impedance matching method was realized through adjusting the distances between the coils and resonators. Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators, at distances up to 3 times the coil radius with efficiency more than 70% and load power also close to 3.5 W. 展开更多
关键词 wireless power transfer middle range multiple resonators S-PARAMETERS two-port network impedance matching
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Active Field Canceling System in Next Generation Nano-Fab
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作者 Feng-Chang Chuang Yu-Lin Song +5 位作者 Chwen Yu Sen-Kuei Hsu Tzyh-Ghuang Ma Tzong-Lin Wu Ching-Yuan Yang Luh-Maan Chang 《Journal of Energy and Power Engineering》 2012年第7期1163-1169,共7页
ELF (extremely low frequency) magnetic fields from power-line current influence the yield of CMOS foundry. The poor yield happens because of ELF magnetic fields inducing directly the measurement or process equipment... ELF (extremely low frequency) magnetic fields from power-line current influence the yield of CMOS foundry. The poor yield happens because of ELF magnetic fields inducing directly the measurement or process equipment for cutting-edge chips below 28 nm process. The equipments of electron microscopes, including SEM (scanning electron microscope), TEM (transmission electron microscopy), STEM (scanning transmission electron microscopy) and EBLS (electron beam lithography system) are very susceptible to ELF magnetic fields emanating from various electrical power sources outside of the building and within next generation CMOS foundry recommends a maximum of 0.3 mG. The active canceling method uses active coils with current sensing field via sensor and inducing man-made electromagnetic field to reduce the stray magnetic field. Unfortunately, the conventional system takes more time to products field because of parasitical capacitance and resistance in long coil. The longer canceling coil the system construct, the more time it takes. Besides, canceling system should spend more time on calibrating non-linear current amplifier through software design. This research designs simpler anti-electro-magnetic system instead of typical frame and develops one turn canceling coil structure to reduce delaying time. Several parallel cells generate field up to 23.81 mG controlled by MPU (micro processor unit). This system decreases the power-line inducing filed below 0.3 mG. 展开更多
关键词 Extremely low frequency power-line current CMOS foundry passive shielding actives shielding hybrid shielding.
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Crack Quantification of Bolted Joints by Using a Parallelogram Eddy Current Array Sensing Film
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作者 SUN Hu ZHANG Yiming +2 位作者 YI Junyan WANG Yishou QING Xinlin 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第1期98-107,共10页
Crack monitoring at the bolt hole edge is one of the important focuses of aircraft structural health monitoring.In this study,a novel eddy current sensing film based on a parallelogram coil array is developed to quant... Crack monitoring at the bolt hole edge is one of the important focuses of aircraft structural health monitoring.In this study,a novel eddy current sensing film based on a parallelogram coil array is developed to quantitatively monitor the crack characteristics near the bolt hole with fewer layers and coils,compared with the existing methods.The parallelogram coil array configuration is designed and optimized to improve the quantitative monitoring ability of the crack.A 3×3 parallelogram coil array is used to quantify the crack parameters of aluminum bolted joints.Finite element simulation and experiments show that the proposed parallelogram coil array could not only accurately and quantitatively identify the crack angle at the edge of the bolt hole,but also track the crack length along the radial direction of the bolt hole and the depth along the axial direction. 展开更多
关键词 bolted joints flexible eddy current sensing film parallelogram coil array structural health monitoring
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Magnetically induced micropillar arrays for an ultrasensitive flexible sensor with a wireless recharging system 被引量:3
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作者 Libo Gao Ying Han +9 位作者 James Utama Surjadi Ke Cao Wenzhao Zhou Hongcheng Xu Xinkang Hu Mingzhi Wang Kangqi Fan Yuejiao Wang Weidong Wang Horacio D.Espinosa 《Science China Materials》 SCIE EI CAS CSCD 2021年第8期1977-1988,共12页
Significant efforts have been devoted to enhancing the sensitivity and working range of flexible pressure sensors to improve the precise measurement of subtle variations in pressure over a wide detection spectrum. How... Significant efforts have been devoted to enhancing the sensitivity and working range of flexible pressure sensors to improve the precise measurement of subtle variations in pressure over a wide detection spectrum. However,achieving sensitivities exceeding 1000 kPa^(-1) while maintaining a pressure working range over 100 kPa is still challenging because of the limited intrinsic properties of soft matrix materials. Here, we report a magnetic field-induced porous elastomer with micropillar arrays(MPAs) as sensing materials and a well-patterned nickel fabric as an electrode. The developed sensor exhibits an ultrahigh sensitivity of 10,268 kPa^(-1)(0.6–170 kPa) with a minimum detection pressure of 0.25 Pa and a fast response time of 3 ms because of the unique structure of the MPAs and the textured morphology of the electrode. The porous elastomer provides an extended working range of up to 500 kPa with long-time durability. The sophisticated sensor system coupled with an integrated wireless recharging system comprising a flexible supercapacitor and inductive coils for transmission achieves excellent performance. Thus, a diverse range of practical applications requiring a low-to-high pressure range sensing can be developed. Our strategy, which combines a microstructured high-performance sensor device with a wireless recharging system, provides a basis for creating next-generation flexible electronics. 展开更多
关键词 high sensitivity pressure sensor SUPERCAPACITOR wireless recharging flexible electronics
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