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wojieliuliangji
涡街流量计数字信号处理系统的改进与实验
本文针对涡街流量计数字信号处理系统存在的不能测量小流量和易受电磁干扰的问题,对其软硬件方面进行了
改进。重新设计和研制了电荷放大器,提高了灵敏度,增强了适配能力。采取了合理的接地和屏蔽措施,提高了系统的抗干
扰能力。采用去均值和频谱校正的方法,改善了系统的测量精度。编制键盘监控软件,采用状态变量法设计键值分析程序,
实现人机对话功能。进行了液体流量和气体流量的标定实验,结果表明,改进后的数字信号处理系统比常规的流量计信号处
理系统的测量精度高、流程比宽和适配能力强。(Vortex Flowmeter digital signal processing system improvements and experimental
In this paper, vortex flowmeter digital signal processing systems can not exist in measuring small flows and vulnerable to electromagnetic interference problems, its hardware and software aspects of the
Improvement. To re-design and development of the charge amplifier, increasing sensitivity and enhanced adaptive capacity. Adopted a reasonable grounding and shielding measures to improve the system s anti-stem
Interference capability. Used to mean and spectral correction methods to improve the system s measurement accuracy. The preparation of keyboard monitoring software, using state-variable method designed to key analytical procedures,
Functions to achieve human-machine dialogue. Were liquid flow and gas flow calibration experiments, the results show that the improved digital signal processing systems than the conventional flow meter signal at
Management System s high accuracy, process than the w)
- 2010-02-01 08:14:53下载
- 积分：1
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20070924055454_12743
采用IGBT的正弦波中频逆变电源设计方案(The use of the sine wave frequency IGBT inverter power supply design)
- 2008-12-20 13:24:05下载
- 积分：1
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3
说明： very important part in vlsi fabrication. Lithography process
- 2011-05-29 22:48:16下载
- 积分：1
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HVAC PART03- By Eng. Ramy Ghoraba
说明： HVAC PART03- By Eng. Ramy Ghoraba
- 2020-06-25 19:40:02下载
- 积分：1
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dc-ac-10-kW-inverter
详细设计10KW逆变器的英文资料，内有原理图，有较大参考价值(10KW inverter detailed design information in English, there are schematic, a larger reference value)
- 2011-09-15 09:40:57下载
- 积分：1
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student-course-management-system
学生成绩统计查询系统，有学生、课程、统计、查询、系统说明五个菜单，单击不同的菜单会有子菜单出现。很好的实现管理学生成绩问题。(Student performance statistics query system, students, curriculum, statistics, query, the system shows five menu, click a different menu sub-menu will appear. Achieve good management of student achievement issues.)
- 2011-06-13 01:21:28下载
- 积分：1
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ATM-curriculum-design-report
银行自动取款机ATM的课程设计报告，用C#.net编写(Bank automated teller machine ATM curriculum design report, using C#. Net written)
- 2013-07-17 11:15:18下载
- 积分：1
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fgd785687
浅海远程水声通信由于水声信道带来的严重多径干扰和衰落, 导致通信速率低、误码率高
以及接收端信噪比低等缺点。针对这一问题, 提出了一种比较有效的M 元线性调频(L FM ) 水声通
信技术。(Remote shallow water acoustic underwater communication channel because of the serious multi-path interference and fading, resulting in lower communication rate, error rate
And the receiver signal to noise ratio and low defects. To solve this problem, we propose a more effective M-ary linear FM (L FM) acoustic communication
ICT.
)
- 2011-12-25 14:44:01下载
- 积分：1
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Flight-control-Law
介绍了飞机纵向和横航向控制律设计，给出了设计过程，设计细节作了详细论述(the control law for logititude and direction is introduced , the design process is gived,the design details is demostrated.)
- 2020-10-12 22:47:32下载
- 积分：1
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gearbox-testproblem
本文研究开发了大功率风电齿轮箱试验台,用于6兆瓦以下的风电齿轮箱台架试验。论述了风电机组和风电齿轮箱的基本结构及电功率封闭式的齿轮箱试验台在风电齿轮箱试验台中的应用。在此基础上,利用西门子变频器、电动机、可编程控制器和WINCC监控软件搭建了风电齿轮箱试验台的驱动和加载系统,可实现对风电齿轮箱的驱动和加载,完成风电齿轮箱的各种试验,模拟风电齿轮箱在风力发电时的工作状态。利用NI数据采集卡和Labview软件搭建了风电齿轮箱运行状态监控系统,可对试验中的风电齿轮箱进行状态监控、故障诊断和停机保护。(With the development of science and technology , Phoenix can be more and more attention as a new non-polluting and renewable energy . )
- 2012-07-25 11:33:24下载
- 积分：1
