Geospatial Position Accuracy Improvement

公共描述GPAI项目使用地理空间数据和创新的定位系统来解决网络铁路运输的挑战。网络铁路运营和维护英国的大部分铁路网络。该公司正在大力投资技术以提高产能。例子包括数字信号、交通管理和自动列车运行。这些技术需要精确的列车位置才能运行。不幸的是，GPS在铁路环境中不能很好地工作，因为铁路环境中有深岩屑、隧道、有盖的车站和许多建筑物会阻挡信号或引起反射。即使有良好的卫星能见度，当有多条平行轨道时，确定火车所占用的轨道的精度也往往是不够的。因此，铁路网不得不使用昂贵的基础设施系统来定位列车，包括转发器、轴计数器和轨道电路。网络铁路信号创新小组（SIG）参与确定和验证这些基础设施系统的位置。对其位置的置信度越高，需要在控制系统设计中内置的误差范围就越小，可以实现的容量就越大。为了实现这些测量，网络铁路公司目前运行着专业的工程列车，这些列车的运营成本很高，而且由于它们的存在，减少了可用于客运服务的轨道容量。SIG希望转向安装在客运列车前部的低成本测量设备。然而，由于GPS的限制，它不能以足够的精度定位列车。因此，该公司正在寻求解决方案，将低成本gps定位系统的精度提高到1米以内。GPAI项目：地理空间定位精度改进是一项建议的服务，通过在同一路线上重复运行来改进对列车位置的估计。它特别适用于每天行程相似的客运列车。改进是通过创新地使用RDS国际开发的视频列车定位系统实现的。VTPS是一种利用前置摄像头的实时图像处理技术来定位列车的技术。该项目将通过开发需求和商业案例验证概念、技术和商业市场路线来调查GPAI的可行性。该项目将由RDS牵头，由Network Rail、One Big Circle和Porterbrook提供支持。

Public descriptionThe GPAI project uses geospatial data and an innovative positioning system to solve a Network Rail transport challengeNetwork Rail operates and maintains most of Great Britain's rail network. It is investing heavily in technology to increase capacity. Examples include digital signalling, traffic management and automatic train operation.These technologies require accurate train location to operate. Unfortunately, GPS does not operate well in the rail environment with deep cuttings, tunnels, covered stations and many structures blocking the signal or causing reflections. Even with good satellite visibility, accuracy is very often insufficient to determine which track a train is occupying when there are multiple parallel tracks. Consequently, Network Rail has to use expensive infrastructure-based systems to locate the train, including transponders, axle counters and track circuits.Challenge. The Network Rail Signalling Innovations Group (SIG), is involved in determining and validating the location of these infrastructure systems. The greater the confidence in their location, the smaller the error margin that needs to be built into the control system design and the greater the capacity that can be achieved.To make these measurements, Network Rail currently runs specialist engineering trains which are expensive to operate and, by their presence, reduce the track capacity available for passenger services. SIG wishes to move to low cost survey equipment mounted on the front of passenger trains. However, because of GPS limitations, it is not able to position the train to sufficient accuracy. It is therefore seeking solutions to improve the accuracy of low cost GPS-based location systems to within 1m.GPAI Project: Geospatial Position Accuracy Improvement is a proposed service that improves estimates of train location through repeat runs over the same route. It is particularly suited to passenger trains that make similar journeys on a daily basis. The improvement is achieved through innovative use of the Video Train Positioning System developed by RDS International. VTPS is a technology that locates a train using real-time image processing from a forward facing camera.The project will investigate GPAI feasibility through development of:requirements and business caseproof of concept demonstratortechnical and commercial routes to market.The project will be led by RDS, supported by Network Rail, One Big Circle and Porterbrook.