搜索结果: 91-105 共查到“工学 Acquisition”相关记录113条 . 查询时间(0.095 秒)
A high dynamic range data acquisition system for a solid-state electron Electric Dipole Moment experiment
high dynamic range data acquisition system solid-state electron Electric
2011/7/21
We have built a high precision (24-bit) data acquisition (DAQ) system with eight simultaneously sampling input channels for the measurement of the electric dipole moment (EDM) of the electron. The DAQ...
DATA ACQUISITION THROUGH THE MODEL AIRCRAFT FOR MAPPING PURPOSES
Model aircraft Photogrammetry Non-metric camera Accuracy
2014/6/5
Photogrammetry and remote sensing have become indispensable in today’s surveying with the emerging technologies. Some
difficulties are being experienced in applications due to the incredible advance...
PHOTO-BASED 3D SCANNING VS. LASER SCANNING – COMPETITIVE DATA ACQUISITION METHODS FOR DIGITAL TERRAIN MODELLING OF STEEP MOUNTAIN SLOPES
Photogrammetry TLS DEM/DTM Comparison Visualization
2014/6/5
The paper presents how terrestrial laser scanning (TLS) and terrestrial digital photogrammetry were used to create a 3D model of a
steep mountain wall. Terrestrial methods of data acquisition are th...
WSN土壤湿度采集节点电压补偿方法研究（Voltage Compensation Method of WSN Soil Moisture Acquisition Nodes）
无线传感器网络 土壤湿度 神经网络 补偿
2010/12/29
针对适用于WSN土壤湿度采集节点的EC-5传感器对电源电压敏感的问题，从传感器工作原理入手分析电源电压引起检测误差的来源，且发现当传感器各项参数确定后，这种误差随着被测土壤湿度增大而增大。采用CC2430芯片作为WSN信息传输节点，建立具有多节点的上下位机WSN土壤湿度采集系统，以节点电压u和被测土壤实际湿度θ为对象，运用神经网络对采集节点中非线性土壤湿度传感器系统进行逆向建模，在上位机上...
农田土壤含水率和坚实度采集仪设计与试验（Design and Test on the Field Soil Moisture and Compaction Acquisition Instrument）
土壤 含水率 坚实度
2010/12/28
设计了可以定位、快速、同步测量农田土壤含水率和坚实度的采集仪。在探讨该仪器测量原理和软硬件设计的基础上,对其测量的准确性进行了试验分析。某苗圃地,选定5m×5m的30个采样点,用农田信息采集仪和烘干法分别测量各点的土壤含水率,并对测量值进行简单相关分析，其相关系数为0.9179,达到极显著性相关。以同样的方式,采用农田信息采集仪和SC900型数字土壤坚实度仪,分别测量30个采样点10cm和...
Effect of Atmospheric Turbulence on Acquisition Time of Ground to Deep Space Optical
Atmospheric Turbulence Acquisition Time Binary Phase Shift Keying (BPSK)
2010/2/2
The performance of ground to deep space optical
communication systems is degraded by distortion of the beam as it
propagates through the turbulent atmosphere. Turbulence causes
fluctuations in the ...
支持产品概念创新的国外专利知识获取方法（Method of Foreign Patent Knowledge Acquisition to Support Product Conceptual Innovation Design）
概念设计 创新设计 专利分类 知识获取
2009/12/28
提出了一种设计目标导向的专利文献分类方法，分析了各类专利在产品设计中的作用，建立了由创新层次知识、原理关联知识、专利原理方案知识和语言知识组成的产品创新设计知识体系，描述了基于框架结构和概念图的专利原理方案表示模型，进而研究了机械产品专利原理方案知识获取方法，采用自然语言理解从专利文献中抽取产品作用结构概念图，利用原理关联知识提炼专利产品的功能效应信息。最后结合钻夹头产品创新实例，说明了该方法可充...
茶园天气信息采集与无线发送装置设计（Apparatus of Climatic Information Acquisition and Wireless Transmission for Tea Farm）
茶园 天气参数 霜冻害
2009/11/3
基于单片机和GSM技术，开发了用于茶园防霜的天气参数采集与无线发送的新型装置。其硬件系统由AT89C52单片机、A/D转换器、TC35i GSM模块、RAM数据存储器、键盘显示器、微型打印机、天气参数传感器及电源等组成。软件采用汇编语言编制，主要功能包括：系统设置、短信接收和发送、数据采集存储和查询、结果显示及打印管理等。该装置能实现可靠的天气信息实时采集和无线传送，可用于茶园小气候的监测和晚霜冻...
温室环境下黄瓜采摘机器人信息获取（Information Acquisition for Cucumber Harvesting Robot in Greenhouse）
温室 机器人 黄瓜采摘 机器视觉 信息感知
2009/11/3
研究基于近红外图像的黄瓜果实与茎叶的信息表达方法，有效实现了近色系生物信息的图像识别。分析了黄瓜采摘深度图像信息的特点，通过建立基于灰度相关与极线几何相结合的匹配策略实现了双目视觉下的黄瓜抓取点的立体匹配和三维重建。研究温室环境下不同时间光照强度变化特点，建立了光照分析模型，提高了不同光照条件下的导航线提取的适应性。试验表明机器人视觉系统能有效识别、定位果实的空间位置，定位误差控制在±5 mm以内...
基于机器视觉的非结构环境下黄瓜目标特征识别（Feature Acquisition of Cucumber Fruit in Unstructured Environment Using Machine Vision）
温室 黄瓜 信息处理
2009/9/11
提出了一种基于近红外光谱成像技术的温室黄瓜信息检测方法。根据黄瓜的光谱反射特性，选用特定波长的近红外光谱图像解决与背景颜色相近的果实信息表征；利用图像内作物灰度分布差异确定果实所在区域，区域内采用矩不变优化阈值分割和特殊形态学模板滤波，实现果实目标有效识别；结合黄瓜物理性状和纹理特征检测果实的可抓取部位，并引入形心主惯性轴思想确定果柄的切割点位置。实验结果表明果实的正确识别率为93.3%，抓取点、...
Data and Pilot Combining for Composite GNSS Signal Acquisition
Data Pilot Combining Composite GNSS Signal Acquisition
2009/9/3
With the advent of new global navigation satellite systems (GNSS), such as the European Galileo, the Chinese Compass and the modernized GPS, the presence of new modulations allows the use of special t...
农田土壤pH值和电导率采集仪设计与试验（Design and Experiment on the Field Information pH Value and Electrical Conductivity Acquisition Instrument）
土壤 pH值 电导率 采集仪
2009/8/11
设计开发了测量pH值和电导率的农田信息采集仪。在探讨该仪器测量原理和软硬件设计的基础上，分别采用两点校正法和配比KCl溶液法对采集仪的pH值和电导率测量进行了标定试验，并在一块黄豆田间隔14m×14m进行土壤采样，共采土样15个，对标定方程进行了验证试验。结果表明，土壤pH值标定结果和准确值的相对误差小于1%，土壤电导率相对误差小于14%；土壤pH值标定结果和准确值线性回归模型检验显著性概率为0....
Automatic Data Acquisition System for Offshore Oil Pipeline Magnetic Flux Leakage On-line Inspection
Pipeline inspection Magnetic flux leakage Adaptive filter Data compression
2009/7/24
In order to assure the safety of oil pipeline transmission, it is very important to continue routine inspection of offshore pipelines to identify defects or corrosions as early as possible. A high-sp...
A Study on Knowledge Transfer System in Shipbuilding- Knowledge Acquisition Support System
shipbuilding industry UT-ESS shipbuilding industry
2009/4/29
It's getting more important to transfer knowledge from elder experts to young engineers especially in shipbuilding industry in Japan. We developed knowledge transfer system based on UT-ESS (University...
Designing and Developing a Modern Distributed Data Acquisition and Monitoring System
Complex data Control system aspects Monitoring system OPC Security XML
2014/3/11
This paper introduces new control system aspects used for designing and implementing a distributed data acquisition and monitoring software system. These aspects are proposed according to OPC technolo...