自动测风经纬仪

本文介绍用于气象环保部门的ZFJ-1500自动测风经纬仪的结构原理、特点和现场使用情况。     

ZFJ-02光电测风经纬仪

介绍了用于气象、环保及军事部门的ＺＦＪ－０２光电测风经纬仪的结构特点、原理．采用绝对式码盘和单片机技术实现了测风经纬仪的小型化、多功能、高可靠及实时性．     

经纬仪竖直角新型检定装置

介绍了一种可以实现经纬仪竖直角任意角度检定的新型检定装置，它由一台立卧两用数显转台和一支平行光管组合而成，可以实现对小型经纬仪垂直角０°-１８０°范围内任意位置测量．其结构模块化、简单合理、操作方便、检定结果准确度高，特别适用于测风经纬仪的检定．     

测风经纬仪校准装置与校准方法

阐述了测风经纬仪校准装置的构成、校准原理及利用该装置校准测风经纬仪的具体方法、步骤和校准结果的处理方法。     

基于三维数字照相量测技术的风荷载作用下玻璃幕墙变形量测研究

针对玻璃幕墙在风荷载作用下变形量测方法不能解决全场、复杂节点变形的问题,提出一种基于三维数字照相变形量测技术的光学方法。通过使用双摄像机的三维数字照相量测技术,测定玻璃幕墙在不同风荷载作用下的应变和挠度,然后通过与传统方法应变片和百分表测量以及有限元数值模拟所得的数据进行比较,来验证三维数字量测方法在玻璃幕墙变形量测的可行性。试验结果表明:在相同的风荷载作用下,通过3种方法所测得的应变-位置和挠度-位置的比较,说明三维数字照相量测试验测量得到的玻璃幕墙表面变形数据是准确的,数字照相量测方法可以应用于玻璃幕墙表面变形量测。     

大尺寸测量设备高空精测平台的研制

结合大型精密系统部装及总装精测时对大尺寸测量设备布局优化及稳定性的要求,论述了大尺寸测量设备高空精测平台结构组成、实现设备高空精测时的稳定支撑方式、稳定升降的结构原理。试验数据表明,该平台高空作业时沉降率不大于0. 02 mm/h,加载经纬仪稳定性达到0. 6″/h,满足精测需求。     

一种新型带有自标定的数字准直瞄准测量系统

设计了一种新型带有自标定的数字准直瞄准测量系统。系统采用测微准直望远镜与CCD视觉系统相结合的方式,将测微准直望远镜的目视测量视场转换成数字测量视场,进而实现在整个数字视场范围内取样测量。通过对CCD相机的角度当量和位移当量进行标定,可直接计算出线位移和角位移,实现了数字化测量。通过实验验证,该系统的定位测量不确定度优于激光跟踪仪,定向测量不确定度优于经纬仪,可用于工业大尺寸测量。     

基于电容测微仪的深度自动测量系统

精密摄像系统中,摄像头镜面的安装精度要求非常高,需经过严格检测后方能使用.本文结合镜面实际安装工况,以5套精密电容测微仪为核心设计了非接触式自动测深系统.工件放置后,系统自动将其传送至测量范围内,测头自动调整至最佳测量姿态、距离,综合5套传感器数据计算出镜面安装深度.经鉴定整机精度达到2μm.     

井下作业管(杆)自动测长系统研制

起、下管杆作业是修井作业的主要工艺之一,在下管杆作业前必须对管杆进行测量,以满足设计要求。传统的管杆测长主要是靠人工用米尺来完成,而这种测量方法容易发生测量数据不准,测长和计算耗时费力等现象。针对这种情况,研制开发了井下作业管杆自动测长系统。该系统采用安装在井口护板内的位移传感器传递测长启动信号,钢丝绳上的测长传感器进行测长,满足了井下采油作业测长的工艺要求,降低了操作者的劳动强度,提高了工作效率。     

激光测风雷达风场探测性能评估

激光测风雷达作为一种新型测风设备,在风场精准探测领域具有重要应用前景.为实现激光测风雷达风场探测性能的评估,将相干脉冲激光测风雷达的测风数据与探空气球风场数据进行时空同步处理后开展比对分析.以探空气球风场数据为真值,通过区分不同天气条件、不同高度区间、不同风速区间对数据进行分类,计算两种风场数据的相关系数与平均偏差,分...     

陀螺经纬仪校准系统精确对中方法探讨

在陀螺经纬仪校准过程中,需要将陀螺经纬仪中心与天文定向时的观测中心对中,此对中精度直接影响其寻北精度的测量结果。本文设计了一种基于两个平行光管的双目标精确对中方法,经实验验证,该方法可实现被检陀螺经纬仪中心与天文定向时的观测中心的高精度对中,成功提高了陀螺经纬仪校准的准确性;为配合该方法的使用,设计了陀螺经纬仪对中调整机构,该机构可以实现陀螺经纬仪水平二维位移调整和高低姿态调整,通过姿态调整,可以与天文定向时的观测中心高精度对心,提高测量精度,并满足不同型号陀螺经纬仪校准需求。     

Edge technique Doppler lidar wind measurements with high vertical resolution

We have developed a Doppler lidar system using the edge technique and have made atmospheric lidar wind measurements. Line-of-sight wind profiles with a vertical resolution of 22 m have a standard deviation of 0.40 m /s for a ten-shot average. Day and night lidar measurements of the vector wind have been made for altitudes from 200 to 2000 m. We validated the lidar measurements by comparing them with independent rawinsonde and pilot balloon measurements of wind speed and direction. Good agreement was obtained. The instrumental noise for these data is 0.11 m /s for a 500-shot average, which is in good agreement with the observed minimum value of the standard deviation for the atmospheric measurements. The average standard deviation over 30 mins varied from 1.16 to 0.25 m /s for day and night, respectively. High spatial and temporal resolution lidar profiles of line-of-sight winds clearly show wind shear and turbulent features at the 1 -2-m /s level with a high signal-to-noise ratio and demonstrate the potential of the edge-technique lidar for studying turbulent processes and atmospheric dynamics.     

Digital Continuity Guarantee Approach of Electronic Record Based on Data Quality Theory

Since the British National Archive put forward the concept of the digital continuity in 2007, several developed countries have worked out their digital continuity action plan. However, the technologies of the digital continuity guarantee are still lacked. At first, this paper analyzes the requirements of digital continuity guarantee for electronic record based on data quality theory, then points out the necessity of data quality guarantee for electronic record. Moreover, we convert the digital continuity guarantee of electronic record to ensure the consistency, completeness and timeliness of electronic record, and construct the first technology framework of the digital continuity guarantee for electronic record. Finally, the temporal functional dependencies technology is utilized to build the first integration method to insure the consistency, completeness and timeliness of electronic record.     

抑制机械谐振的一种改进的数字滤波器

分析了机械谐振频率对经纬仪系统性能的影响,在传统双 T 网络的基础上,提出了一种改进的数字滤波器。该滤波器可以通过适当的参数修改达到控制机械谐振点陷波幅值的效果。实验表明,本文提出的改进的数字滤波器滤波效果好于传统的双 T 网络滤波器。     

脉冲调宽调速系统的数字化设计与实现

详细介绍了光电经纬仪伺服控制系统速度回路从数字脉冲调宽到数字调节器的硬件及软件设计方法 ,该系统易于与位置回路扩展 ,从而实现伺服控制系统的全数字化控制。     

On reliability calculations when stresses are generated by a non-homogeneous poisson process

Reliability of a structure with random strength is investigated assuming that the occurrences of random stresses are governed by a non-homogeneous Poisson process. Here calculations are carried out based on the observation that the failure corresponds to the occurence of the first record stress (new high in the sequence of stresses) relative to the random strength of the component. Explicit formulae for two practically important cases are derived and two examples using real data for wind and earthquake are included.     

Energy monitoring of process systems: time-series segmentation-based targeting models

Energy monitoring systems calculate actual energy use, estimate energy needs at normal operation, track energy metrics, and highlight issues related to energy efficiency of process plants. Analysis of key energy indicators (KEIs) allows the comparison of process efficiency at different operating regimes. Based on the extracted knowledge realistic targets of KEIs can be determined. The performance of data-driven targeting models depends on how effective the operating regimes are characterized. Till now this modeling task is performed manually based on heuristic and subjective evaluation of the operation. A goal-oriented time-series segmentation technique has been developed to automate the selection of proper data used for the identification of targeting models. With the proposed novel segmentation algorithm targeting-models for different operating regions can be automatically determined. The concept of the resulted energy monitoring system is demonstrated at Heavy Naphtha Hydrotreater and CCR Reforming Units of MOL Hungarian Oil and Gas Company.