共查询到19条相似文献,搜索用时 593 毫秒
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阐述了GARMIN GPS Map 60CSx在1∶5万水系沉积物测量中的应用,较好地解决了直接用地形图定点而造成跑错沟,以及由于人为因素导致点位失真和采样随机性大的问题,提高了野外采样的效率。野外工作完成后,在室内利用GPSMapGIS软件将GPS航迹及点位按所需要的比例尺转换成对应的MapGIS可直接识别的文件,并将转换好的文件添加至设计底图,这样以来管理人员便能清晰直观的了解工作人员在野外采样时的进度及采样点的到位情况,对采样质量起到了很好的监控作用。 相似文献
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在大比例尺的化探测量中,用GPS单点绝对定点技术来进行测网的布设,减少了控制测量环节。降低了生产成本。因此,GPS绝对定点在化探测量中仍有应用的前景。但是,绝对定位时必须做到:(1)合理选择校正的控制点(三角点或四角点);(2)正确校正参数;(3)定期地检测仪器;(4)保证仪器的高度角和有效工作时间。本次该方法应用在化探的测网布设中。实测面积7km^2,经传统测量仪器检查验收,证明文中提出的方案完全可以用于生产实践。 相似文献
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手持GPS接收机经常用于坐标的采集或定位。因为手持机接收的坐标系统和工作区的坐标系统不一致,就会需要通过求解三参数,进行坐标系统的转换来采集野外数据。 相似文献
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地质勘查作业常使用手持GPS配合地形图进行野外测量,手持GPS地理底图更新不及时且不够直观,地形图上地物信息老旧,都不能更好地指导生产。通过近几年的工作摸索,总结出4种常用软件(Coord坐标转换、Unistrong GIS office、奥维互动地图、91卫图助手)相互配合使用的方法 ,作为辅助测量手段以提高地勘工作中的效率。 相似文献
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通过用手持GPS对长春市城区25块街区的测量面积与1:500地形图上同名地块面积的比较,得出当地块面积大于10万m2时,手持GPS-次测量的面积精度为0.32%~0.56%,平均为0.51%;通过回归分析技术对手持GPS测量的面积进行改正,所测面积的平均精度可提高到0.3%. 相似文献
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GPS单点绝对定位测定地质点的试验研究 总被引:3,自引:1,他引:2
在小比例尺地质测量中,用GPS单点绝对定位技术测定地质点,减少了控制测量环节,降低了成本,该方法在某地质勘查项目定点实验中取得成功。 相似文献
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轨道式巡检机器人的高精度定位技术是带式输送机智能化巡检的重要研究方向之一,而矿用带式输送机距离超长,工作环境复杂,严重影响巡检机器人的定位精度。针对目前的轨道式巡检机器人定位技术在矿用带式输送机巡检领域存在的问题,提出了基于编码器和NFC双传感器修正融合的高精度定位方法。分析带式输送机轨道式巡检机器人轨道与环境特性对编码器系数的影响,提出轨道分段原则。利用机器人搭载的编码器数据反馈特点,构建编码器递推定位方法。通过机器人运行的历史数据,对编码器系数进行分段分方向修正,并提出基于递推最小二乘的编码器系数修正方法,以提高编码器对轨道环境的适应性。在此基础上,根据机器人所在轨道分段的位置不同,在段端基于卡尔曼滤波算法实现编码器和NFC数据融合,在段内利用分段分方向修正系数与编码器信息进行递推定位,实现轨道式巡检机器人连续高精度的定位。针对所提方法搭建了实验平台并进行了实物测试,实验结果表明,相较于编码器定位、RFID定位和两者融合定位三种传统定位方式,基于编码器和NFC的修正融合定位算法能够有效提高轨道式巡检机器人定位对轨道环境的适应性,同时提高轨道式巡检机器人的定位精度。 相似文献
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RTK实时动态差分法,这是一种新的常用的GPS测量方法,能够在野外实时得到厘米级定位精度的测量方法,它采用了载波相位动态实时差分方法,是GPS应用的重大里程碑,它的出现为工程放样、测图,各种控制测量带来了新的曙光,极大地提高了外业作业效率。 相似文献
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RTK 技术是一种新的常用的GPS 测量技术,它能够实时地提供测站点在指定坐标系中的三维定位结果,具有作业效率高、定位准确、作业条件要求低和操作简便等优点,给测图工作带来了便捷,提高了外业放样的工作效率和放样点的精度,在矿山测量中得到了广泛应用。但是,受卫星状况、天空环境和数据传输等因素的影响,RTK 技术也存在着一些不足。通过对已知点检核比较、重测比较和电台变频实时检测对RTK 定位技术进行质量控制,完善RTK 技术。随着RTK 技术的不断成熟,对加快矿山测量进度、减轻测量劳动强度有重要的意义。 相似文献
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GNSS包括GPS、GLONASS、GALILEO和BDS四大卫星定位系统,研究发现相比单一的GPS定位系统,GNSS多星系统在定位精度、系统可靠性及安全性方面具有明显优势。在介绍多星座组合导航算法及系统定位原理的基础上,结合中海达V30接收机在控制网设计及控制点位布设方面的灵活性,阐述了GNSS技术在广东省阳山县某矿区控制测量中的实际应用情况。HGO软件在内业数据处理各环节的操作表明,HGO解算的数据成果精度大幅提升,点位平面中误差由原来的16.3 mm提高到4.78 mm。同时,GNSS技术在矿区控制测量中能克服地形复杂及植被覆盖区带来的不利影响,有效提高作业效率,从而达到理论技术指导生产的目的。 相似文献
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A tightly-coupled GPS (global positioning system)/SINS (strap-down inertial navigation system) based on a GMDH (group method of data handling) neural network was presented to solve the problem of degraded accuracy for less than four visible GPS satellites with poor signal quality.Positions and velocities of the satellites were predicted by a GMDH neural network,and the pseudo-ranges and pseudo-range rates received by the GPS receiver were simulated to ensure the regular operation of the GPS/SINS Kalman filter during outages.In the mathematical simulation a tightly-coupled navigation system with a proposed approach has better navigation accuracy during GPS outages,and the anti-jamming ability is strengthened for the tightly-coupled navigation system. 相似文献
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An estimate of apparent bed-load velocity (v) can be derived from the difference between differential global positioning system (DGPSs) and acoustic Doppler current profiler (ADCP) bottom track (BT) measurements when BT is biased by a moving bottom. A Kalman filter has been developed to integrate GPS and bottom track data to improve estimation of boat velocity during ADCP measurements under moving bed conditions (Rennie and Rainville, 2008, J. Hydraulic Eng., in review). The boat velocity estimated using the Kalman filter is superior to boat velocity from raw GPS data. In this paper we assess the improvement in estimation of v using the Kalman filter as opposed to raw GPS data. Specifically, a synthetic moving bed bias was generated for 22 repeat transects of the Gatineau River, Quebec. The synthetic moving bed bias had mean, variance, and distribution across the section as typically observed during bed-load transport conditions, and had the advantage that it was known explicitly. The errors in estimated apparent bed-load velocity derived using either raw DGPS data or the Kalman filter boat velocity were compared. It was found that the improved boat velocity from the Kalman filter yielded significantly (α = 0.05) better estimates of v, (e.g., 61% reduction in error when the Kalman filter boat velocity was used instead of wide area augmentation system GGA), because boat velocity errors were reduced. Tests with real moving bed data confirmed the Kalman filter was able to significantly reduce errors in bed load calculated with stand alone GPS. 相似文献
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P van Donkelaar 《Canadian Metallurgical Quarterly》1997,8(9-10):2139-2142
Saccadic eye and hand movements made to step displacements in target position were measured under conditions designed to dissociate the output of the ocular and manual motor systems. This was accomplished by having subjects look and point, either with or without vision of the hand (closed or open loop, respectively) at peripheral targets starting from independent initial positions. The results showed that the amplitude of open loop pointing responses increased in size when accompanied by saccades that were larger than the required hand movement. Providing the subject with visual feedback of the hand during the response or asking them to visually fixate caused this effect to disappear. Taken together, this pattern of results suggests that when vision of the hand is unavailable the programming of saccade metrics influences the control of simultaneously produced pointing movements in an on-line manner. 相似文献
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全球定位系统(Global Positioning System)在高海拔矿山的应用,近年来得到了迅速的推广。这主要依赖于系统可以向全球任何用户全天候地连续提供高精度的三维坐标、三维速度、时间信息等技术参数。文章以迪木那里克铁矿为例,论述GPS在高海拔矿山平面首级控制测量的应用。 相似文献