共查询到20条相似文献，搜索用时 296 毫秒
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开发了一套基于CAN总线和SD卡的高速数据采集系统。硬件系统主要由信号调理模块、A/D转换模块、MEGA处理器模块、CAN通信模块组成。它能够实现信号的采集及前端处理,并能通过CAN总线与SD卡通信,实现对数据的存储、后端处理及显示重点阐述了系统原理及硬件、软件的设计。 相似文献
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王莹 《商丘职业技术学院学报》2007,6(2):68-70
本文设计制作了一个模拟／数字（A／D）转换卡，可将经过SiC传感器调理后的毫伏级的模拟信号转成数字信号，并进行相应的显示和存储，可广泛应用于各种中低频小信号采集处理系统中． 相似文献
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振镜式激光加工的轨迹坐标与屏幕坐标不同,需要进行坐标变换才能使振镜运动轨迹在计算机屏幕中正确显示。在Visual Studio 2008环境中针对LMC-2型激光打标卡,提出了坐标系转换和图形缩放的具体方法,实现了轨迹预览和实时监控。 相似文献
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设计了一种以FPGA(现场可编程门阵列)作为主控制器的脉冲信号参数测量系统,采用单片机与FPGA相结合组成系统架构,并通过高速A/D、高速比较器、放大器等硬件电路实现脉冲信号参数采集,数据存入FPGA内部RAM中并进行处理,单片机读取数据并转换后在LCD显示测得参数。该设计实现了脉冲信号幅度、频率、占空比、上升时间等参数测量。测试结果表明,系统测量误差满足设计要求,具有性价比高、功能拓展灵活等特点。 相似文献
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仝庆华 《雁北师范学院学报》2011,27(2)
此监测显示报警系统主要由单片微型计算机作为控制核心,通过气体传感器采集信号、信号放大,数模转换,按键控制,并经过LED显示报警电路显示结果。从甲醛气体传感器出来的微电流信号,经过信号放大电路将信号放大,再通过A/D转换器将模拟电流信号转换成数字信号送入单片机80C51内,然后由单片机及时进行处理。如果甲醛浓度超标,单片机便会发出一系列信号去控制相关的报警设备。 相似文献
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超声波成像技术数据采集系统的设计 总被引：1，自引：0，他引：1
颜忠胜 《泰州职业技术学院学报》2009,9(3):5-8
超声波成像系统中,在计算机软件系统的控制下,通过数据采集卡和接口电路与超声波探头通信,采集超声波回波信号,并经过检波、放大、转换,自动实现数据的采集、存贮、处理、分析,清晰、直观地显示被检测对象的缺陷图像. 相似文献
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当今世界淡水资源日趋紧张,为节水及加强水资源管理,近年来各类IC卡水表在工业及民用领域迅速推广,然而,在应用中反映出来的问题不少,最不尽如人意的是其稳定性及低功耗两个方面,本文着重就这两方面问题作一些讨论和分析。IC卡水表的硬件组成系统由单片机、存储器、脉冲(计数)信号产生电路、液晶显示、读写卡电路以及阀门驱动电路等组成。(1)单片机选用ATMEL89LV51或菲利浦公司的P87LPC764等低电压、低功耗器件。(2)计数信号电路由机械表产生,通过传感器(为干簧管)转换为电平信号,经整形放大,送单片机进行计数处理。(3)读写卡电路。用… 相似文献
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介绍了以STC12C5A为处理器的水位监控系统设计。首先将变送器WRT~136的水位压力信号转变为4~20mA的电流信号,其次经电流/电压转换电路转换为0~5V模拟电压信号,0~5V的模拟电压信号再次通过模/数电路AD0805将模拟信号转换为单片机可以识别的数字信号。主控芯片STC12C5A对数字量读取和处理后,将水位信息传送给数码管进行显示。 相似文献
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数字视频监控系统的核心就是数字视频采集和处理.数字视频处理的过程分为视频图像输入、视频信号处理、编码.视频图像输入由摄像头扫描光信号转变为电信号（标准信号、非标准信号）.视频信号处理主要有计算机系统配合视频采集卡来完成,处理好的信号以数字方式进行编码和储存,也可以进行数模转换后显示输出. 相似文献
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In this paper, a multi-functional development platform for flat panel display (FPD) development is proposed. With the proposed
development platforms, a variety of FPD devices, including organic light-emitting diode (OLED) screens, liquid crystal display
(LCD) screens with touchscreens, OLED microdisplay screens, etc., can be directly and instantly connected, examined and utilized. A field-programmable gate array (FPGA) is used in the development
system to drive different types of FPD devices, and ARM11 S3C6410 is used as the application processor to provide various
services. The development system uses Linux as the system kernel, Qt for Embedded Linux as the UI framework, various system
libraries for video and audio services, and a custom-made user engine for fine-polished appearance and behavior. The development
platform has been used not only in testing and verification of the FPD devices, but also in building OLED-powered handheld
digital devices, shortening the development cycle from OLED devices to mature application products. 相似文献
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黄海山 《荆门职业技术学院学报》2008,23(6)
阐述了电子全息显示器件所用的铁电材料的电光特性及器件结构,借鏊其驱动技术.并针对本器件高分辨率的特性,提出了一种适合电子全息显示器件的驱动技术--分区分块的驱动方法. 相似文献
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串行同步双缓冲扫描提高平板显示器的显示亮度和传送利用率 总被引：2，自引：1，他引：2
This paper presents a serial synchronous scanning mode in flat panel display (FPD) by adding a latch buffer between the serializer and the driving buffer. Comparing with conventional techniques, the proposed structure can efficiently reduce the brightness loss and improve the transmission performance. Theoretical analysis and experimental results show that the ratio between the lightest weight display time and the relative transmission time is a tradeoff between brightness loss and transmission efficiency. 相似文献
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With the increase of gray scale and flat panel display (FPD) size, subspace bitwise scanning strategy can be replaced traditional scanning method to cut down frame frequency. However, the direct searching strategy (DSS) becomes unfeasible to obtain corresponding high gray scale scanning matrix. Thus, particle swarm optimization (PSO) is introduced to accelerate searching for high gray scale weights scanning matrix (WSM) with its parallelism and global optimization feature. Finally a WSM of 256 gray scales i... 相似文献
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提出了一种基于声卡和LabVIEW的音频信号采集分析系统的设计方案。利用声卡把语音信号采集进入计算机,再利用LabVIEW图形化编程语言对音频信号进行时频域分析。实际应用表明:该系统的硬件和软件设计简单,开发周期短,成本低,采样精度高,同时又具有很强的兼容性和扩展性,易于升级换代和维护。此外,用户还可以在PC上配置多块声卡并行工作,实现多通道采集系统。声卡与LabVIEW相结合的信号采集技术在工程测试测量以及教学实践领域中具有广阔的应用前景。 相似文献
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With the increase of gray scale and flat panel display (FPD) size, subspace bitwise scanning strategy can be replaced traditional
scanning method to cut down frame frequency. However, the direct searching strategy (DSS) becomes unfeasible to obtain corresponding
high gray scale scanning matrix. Thus, particle swarm optimization (PSO) is introduced to accelerate searching for high gray
scale weights scanning matrix (WSM) with its parallelism and global optimization feature. Finally a WSM of 256 gray scales
is found out successfully with Matlab, which both gray linearity and scanning efficiency are satisfied. 相似文献
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Aiming at the time redundancy in the flat panel display (FPD) imaging process,the paper studied some problems for FPD gray scale controlling based on the fractal theory,dissertates the construction of the space-time mapping topology architecture,the proposition of optimal scanning structure for FPD's gray imaging,and the creation of the fractal theoretic model. Then the logic implementation and system application are presented based on the fractal model of the optimal scan architecture,and the application results achieved target of eliminating time redundancy and increasing the scanning availability.The novel control mode that the fractai scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system. 相似文献
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This paper discusses a kind of optimal method used for searching flat panel display (FPD) scanning matrix. The method adopts
bionic algorithm: genetic algorithm (GA) and particle swarm optimization (PSO) algorithm. The method using single GA is more
time-consuming, and the search efficiency is low in later evolution; the PSO algorithm is easily falling into the local optimal
solution and appears the premature convergent phenomenon. Hence, a hybrid approach of GAPSO is found to optimize the search
for high grayscale weights scanning matrix. Finally in the acceptable time, it finds a weight scanning matrix (WSM) of 256
gray scales with Matlab, whose scanning efficiency reaches 94.73% and the linearity is very good. 相似文献
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Aiming at the time redundancy in the flat panel display (FPD) imaging process, the paper studied some problems for FPD gray
scale controlling based on the fractal theory, dissertates the construction of the space-time mapping topology architecture,
the proposition of optimal scanning structure for FPD’s gray imaging, and the creation of the fractal theoretic model. Then
the logic implementation and system application are presented based on the fractal model of the optimal scan architecture,
and the application results achieved target of eliminating time redundancy and increasing the scanning availability. The novel
control mode that the fractal scanning IP core described with Verilog language embedded in the FPGA hardware frame can efficiently
increase the imaging gray scales and quality in the FPDs scanning controller and speed up the frame frequency of display system. 相似文献