共查询到19条相似文献,搜索用时 78 毫秒
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为了提高光电编码器输出信号在特定应用系统中的抗干扰能力,通过分析研究绝对值型和增量式光电编码器的输出信号形式,提出了采用相应的光电转换器件将电信号转换为光信号进行传输,实验结果表明方法可行,传输信号稳定并能可靠转换,提高了编码器输出信号的抗干扰能力。 相似文献
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在红外热像仪调焦系统设计中,通过电机带动调焦镜组沿直线导轨往复运动,从而对调焦镜组的位置精确变化实现焦距的变化。为了精确控制调焦镜组的位置,调焦控制系统需要高分辨率的编码器实时反馈调焦镜组的位置,以实现对调焦镜组的闭环控制。红外热像仪调焦控制系统中采用增量式光电编码器作为调焦镜组位置的反馈测量元件。针对增量式编码器的特点,利用CPLD(complex programmable logic device)丰富的逻辑资源和可编程的灵活性,设计了一种读出电路,可以实时精确反馈调焦镜组的位置。经实际项目验证,该方案可以实时并精确地读出增量式光电编码器的位置信息,具有一定的抗干扰能力,可以实现高精度的位置伺服控制,满足系统要求。 相似文献
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基于增量式光电编码器的电机转速稳定度检测 总被引:2,自引:0,他引:2
在光机扫描型红外遥感仪器中,扫描电机的转速稳定度对整个系统的性能至关重要。本文提出了一种基于增量式光电编码器的电机转速稳定度检测解决方案,同时采集扫描电机的转速瞬时稳定度数据和周期稳定度数据,并给出实际测试结果。 相似文献
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光电增量编码器与微处理器的接口电路 总被引:1,自引:0,他引:1
介绍一种伺服系统中应用广泛的光电编码器和微处理器接口电路-正交译码器,重点是关于数字滤波器和四倍频正交译码器的电路设计以及中应考虑的问题。 相似文献
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一种光电编码器的译码电路 总被引:1,自引:0,他引:1
一种光电编码器的译码电路陆明珠,刘军海,苏启生(西安交通大学金属材料强度研究所,710049)概述旋转角位移测量在工程实际中屡见不鲜。其方法有模拟式和数字式之分,模拟式简单、方便,而数字式则更具高分辨率和更易实现与之相关系统的自动化测量和控制之优点。... 相似文献
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二维光正交码OCDMA系统编解码器的设计 总被引:2,自引:0,他引:2
文章提出了二维光正交码的概念并对其性有进行了分析,重点介绍了二维光正交码光纤延迟线编解码器的设计,并且给出了二维光正交码光纤光栅编码原理。 相似文献
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This paper covers a micro sensor analog signal processing circuit system(MASPS) chip with low power and a digital signal processing circuit board implementation including hardware connection and software design. Attention has been paid to incorporate the MASPS chip into the digital circuit board.The ultimate aim is to form a hybrid circuit used for mixed-signal processing,which can be applied to a micro sensor flow monitoring system. 相似文献
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In this paper,several applications in all-optical signal processing based on a semiconductor optical amplifier (SOA) and variable delayed interferometers (DIs) have been experimentally demonstrated.Wavelength converter based on a nonlinear polarization switch (NPS) and a DI is proposed and presented for the wavelength conversion of nonretum-to-zero (NRZ) signals.An alloptical nonretum-to-zero to return-to-zero (NRZ-to-RZ)format converter with tunable duty cycles is achieved by the DI with variable delays.The 40 Gb/s reconfigurable optical OR/NOR gate in a single SOA,followed a tunable optical bandpass filter (OBF) and a DI,optical 2R regeneration using an SOA-DI are investigated.It is found that this combinative realization of filters has been endowed with great flexibility and quality for 40 Gb/s optical logic and 2R regeneration. 相似文献
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Milan Stork 《Analog Integrated Circuits and Signal Processing》2006,47(1):65-71
Voltage to frequency converter (VFC) is an oscillator whose frequency is linearly proportional to control voltage. There are
two common VFC architectures: the current steering multivibrator and the charge-balance VFC. For higher linearity, the charge-balancing
method is preferred. The charge balanced VFC may be made in asynchronous or synchronous (clocked) forms. The synchronous charge
balanced VFC or “sigma delta” Sigma-Delta VFC (SVFC) is used when output pulses are synchronized to a clock. The charge balance
VFC is more complex, more demanding in its supply voltage and current requirements, and more accurate. It is capable of 16
to18 bit linearity.
In this paper, the new SVFC (NSVFC) is described. This NSVFC works similarly as conventional SVFC but it has a pure tone on
output (for constant input voltage). Therefore, it is possible to measure the period of NSVFC output (this does not work for
SVFC).
Milan Stork received the M.Sc. degree in electrical engineering from the Technical University of Plzen, Czech Republic at the department
of electronics in 1974 and Ph.D. degree in automatic control systems at the Czech Technical University in Prague in 1985.
In 1997, he became as Associate Professor at the Department of Applied Electronics and Telecommunication, faculty of electrical
engineering on University of West Bohemia in Plzen, Czech Republic. He has numerous journal and conference publications. He
is member of editorial board magazine “Physician and Technology”. His research interest include analog/digital systems, signal
processing and biomedical engineering, especially cardiopulmonary stress tests systems. 相似文献