共查询到20条相似文献,搜索用时 171 毫秒
1.
点火控制系统是某型发动机地面系统的重要组成部分,主要用于完成发动机的常态安全保护和点火控制任务。为优化系统性能,对电容充电原理和充电电路参数计算方法进行了研究,设计了电容充电式点火控制系统,解决了传统发动机点火电路应用大容量电池或电源模块来实现点火控制所带来的设备体积庞大、质量沉重,不便应用于便携式地面系统的问题,不仅可利用电容的瞬间放电能力准确实现对发动机的点火控制,还大大减少了点火电路的质量和体积,有效提高了系统的机动能力,大大扩展了系统的应用范围。 相似文献
2.
一种新型磁电自供电无线传感器供能电路研究 总被引:1,自引:0,他引:1
《传感器与微系统》2010,29(3)
采用矩形杆式磁电复合换能器的双发电单元作为主发电源和辅助发电源,设计了一种电能瞬间放电电路.该电路能够将换能器主发电源采集的能量存储并瞬间释放,提高储能电容的输出功率,而辅助发电源则用来驱动管理电路控制放电电路工作.实验结果表明:当储能电容器中的电能积累到一定程度,管理电路控制电能瞬间放电电路放电,驱动无线传感器工作. 相似文献
3.
4.
5.
一种振动自供能无线传感器的电源管理电路 总被引:2,自引:0,他引:2
针对振动能量采集器的输出功率过低不足以直接驱动无线传感器的问题,设计了振动自供能无线传感器的电源管理电路,根据调谐和阻抗变换原理对能量采集器进行了阻抗匹配,以最大功率对储能超级电容进行充电,对能量存储和电源管理电路的充放电特性进行了理论分析和实验验证。结果表明,该电路大幅度提高了采集器的输出功率和对储能超级电容充电的效率,当0.47 F超级电容电压达到0.6 V时,能量瞬间释放电路控制超级电容瞬间放电,成功驱动最大功耗为75 mW的无线传感器工作。 相似文献
6.
7.
8.
包国雄 《电子制作.电脑维护与应用》2013,(7):32+2
本文从点火器高电压发生原理出发,探析几种常用的电子脉冲点火器高压发生电路实例,对额定工作电压、工作电流、放电周期、输出电压、放电能量、放电脉宽等主要参数进行了阐述,并提出了相应的性能影响方案。 相似文献
9.
针对电池性能研究,为选取高性能电池,通过电池恒流放电精度测量,决定了性能整体精度.对其中电池的放电曲线的检测做为标准.介绍了一种利用压控恒流源对电池做小电流放电,从而测量电池放电曲线的方法,重点在小电流恒流源设计中应注意的问题,并对恒流源、测试仪表和环境温度等影响测试放电曲线精度的因素做了误差分析.通过软件仿真和实际测试证明,该设计方法能将对电池放电曲线的测试误差控制在1%以内. 相似文献
10.
本文针对轮胎内传感器的无线供电问题,重点设计了接收端模块中储能稳压电路。基于电磁共振发射原理,接收端接收到电信号经整流稳压后,为超级电容储能单元充电,此时超级电容停止放电;当无线电能接收中断时,则改由超级电容存储电能向后续电路输入。实验结果表明:当充电电流最大不超过1A时,由0.4V充到额定电压2.7V,并稳压在5V左右,使后续电路能正常工作,满足本系统对充电时间以及储能稳压输出的需求。 相似文献
11.
设计了一种基于改进式时间-幅度转换器(Time-Amplitude Converter, TAC)的高精度时间间隔测量系统。该系统采用集成运放设计TAC中的电流可控的恒流源,并对TAC内部的积分控制部分加入宽带直流放大电路,来提高时间间隔测量的精确度;采用高精度的模数转换器采样TAC的输出,实现高精度时间间隔测量中的模拟到数字的转换;采用现场可编程逻辑门阵列(Field Programmable Gate Array, FPGA)完成系统软件设计,实现对TAC的控制。通过变换TAC的采样电阻的阻值,使恒流源输出不同的电流对电容进行充电,从而使TAC的输出电压满足高精度模数转换器(Analog-Digital Converter,ADC)采集电压的要求。实验表明,在测量时间范围为1us,800ns,400ns,200ns时,该系统的时间间隔测量的最小时间精度为400皮秒。 相似文献
12.
13.
基于恒流源的陀螺仪测温丝电阻测量电路的设计 总被引:3,自引:1,他引:2
陀螺仪是一种广泛应用的惯性器件,针对陀螺仪测试效率低的现状,设计和实现了一种基于恒流源的陀螺仪测温丝电阻测量电路;采用恒流源测量电阻,能有效消除引线电阻带来的测量误差,显著地提高了测量精度;详细描述了系统的功能和总体结构,给出了系统硬件设计方法、软件结构图及实验数据分析;该系统还包括单片机控制的数据采集电路、液晶显示单元、报警输出单元;该测试系统已经成功运用于陀螺仪的温后电阻测量中,实践表明,系统运行稳定可靠,具有较高的测试精度。 相似文献
14.
高精密温度测量的研究与实现 总被引:8,自引:0,他引:8
介绍了一种高精密温度测量的原理和方法。采用铂电阻作为温度传感器 ,在电路设计中主要采取了以下措施 :高精度压控电流源 ,恒流电流为 1mA ;四线制测温电路消除引线电阻影响 ;测温电路自校正 ,抑制环境温度变化和系统误差对测量结果的影响。通过理论计算及实际测量 ,温度在 60 0℃以下的测量精度可达到± 0 0 0 1℃。 相似文献
15.
Quantum-dot cellular automata (QCA) present an unconventional computing model in the nanometer regime. The applications in QCA require complex wire crossings between intersectional wires. The existing wire crossing schemes show low fault tolerance or thermal instability. In this paper, a robust wire crossing scheme is proposed by using two opposite clock zones and redundant cells. The thermostability and fault tolerance are illustrated by using statistical analysis and fault simulations with regard to cell undeposition. This paper also presents a new signal distribution network (SDN) using the proposed wire crossings. The layouts of an XOR gate and a full adder are investigated to show the scalability of the proposed designs to circuits for logic functions with various number of inputs. For the proposed wire crossing and SDN, the circuitries of metal wires to provide the electric fields for driving the involved cells in each clock zone are also discussed. The functionalities of these circuits are validated by using QCADesigner. 相似文献
16.
Simple pixel circuits for high resolution and high image quality organic light emitting diode‐on‐silicon microdisplays with wide data voltage range
下载免费PDF全文
![点击此处可从《Journal of the Society for Information Display》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Sang‐Woon Hong Bong‐Choon Kwak Jun‐Seok Na Seong‐Kwan Hong Oh‐Kyong Kwon 《Journal of the Society for Information Display》2016,24(2):110-116
Two simple pixel circuits are proposed for high resolution and high image quality organic light‐emitting diode‐on‐silicon microdisplays. The proposed pixel circuits achieve high resolution due to simple pixel structure comprising three n‐type MOSFETs and one storage capacitor, which are integrated into a unit subpixel area of 3 × 9 µm2 using a 90 nm CMOS process. The proposed pixel circuits improve image quality by compensating for the threshold voltage variation of the driving transistors and extending the data voltage range. To verify the performance of the proposed pixel circuits, the emission currents of 24 pixel circuits are measured. The measured emission current deviation error of the proposed pixel circuits A and B ranges from ?2.59% to +2.78%, and from ?1.86% to +1.84%, respectively, which are improved from the emission current deviation error of the conventional current‐source type pixel circuit when the threshold voltage variation is not compensated for, which ranges from ?14.87% to +14.67%. In addition, the data voltage ranges of the proposed pixel circuits A and B are 1.193 V and 1.792 V, respectively, which are 2.38 and 3.57 times wider than the data voltage range of the conventional current‐source type pixel circuit of 0.501 V. 相似文献
17.
Andrzej Banaszuk Author Vitae Kartik B. Ariyur Author Vitae Author Vitae Clas A. Jacobson Author Vitae 《Automatica》2004,40(11):1965-1972
We propose an adaptive algorithm for control of combustion instability suitable for reduction of acoustic pressure oscillations in gas turbine engines, and main burners and augmentors of jet engines over a large range of operating conditions, and supply an experimental demonstration of oscillation attenuation, the first for a large industrial-scale gas turbine combustor. The algorithm consists of an Extended Kalman Filter based frequency tracking observer to determine the in-phase component, the quadrature component, and the magnitude of the acoustic mode of interest, and a phase shifting controller actuating fuel-flow, with the controller phase tuned using extremum-seeking. The paper also identifies a closed-loop model with phase-shifting control of combustion instability from experimental data; supplies stability analysis of the adaptive scheme based upon the identified model, and stable extremum-seeking designs used in experiments. 相似文献
18.
19.