新测量列车（NMT）

我们的新测量列车（NMT）监视并以高达125mph的速度记录跟​​踪条件信息。它在成为安全问题或影响我们的性能之前，它有助于找到和识别故障。

Affectionately known as the Flying Banana due to its distinctive yellow livery, the NMT is a unique, high-tech machine that we’ve been using for almost 15 years. Equipped with the newest equipment, high-tech measurement systems, track scanners, and a high-resolution camera, this converted Intercity High Speed Train (HST) helps us measure the condition of our tracks.

它在单个操作班次中衡量远距离的能力在我们的200,000英里的轨道上很有用。NMT在一年内覆盖115,000英里，每440英里每440英里捕获10TB的图像数据。

在125英里小照片中旅行，它比以往更快更准确地识别故障。这有助于我们保持铁路安全，因为我们可以在早期阶段发现问题。工程师可以进行维修或计划维护，以防止脱轨等严重事件。

The NMT and our other monitoring trains enable Network Rail to monitor its track without the need to block railway lines. The monitoring fleet slot between timetabled trains so there are no delays or disruption as a result of its work.

同样，它为我们节省了数百万英镑，因为我们可以避免不必要的维护。通过了解轨道状况，我们可以在故障发生之前预测和预防故障。这使我们能够把我们的努力瞄准最需要的地方。

Our Route Services team operates the NMT. The on train technicians monitor the equipment and can close railway lines and order an immediate fix if needed. The train supplements the work of our track patrol specialists who carry out further inspections, following up on faults found by the NMT.

Measuring with the NMT gives the most accurate data as the train affects the track in the same way as a passenger train.

感官设备

The NMT is the most technically advanced train of its type in the world. This is thanks to its range of sensory technology, with both mechanical devices and optical instruments on board.

激光传感器提供有关轨道头的轮廓，测量形状和光学运动的信息。在同一时，传感器和加速度计机械地测量火车的上下运动，因为它沿着轨道行驶。该数据提供有关轨道几何形状的信息 - 轨道头的形状和轮廓以及轨道的扭曲。

Our普通线模式识别（PLPR）系统当火车经过轨道部件时，使用一系列的激光和照相机来检测这些部件。图像分析软件使用一种算法来比较摄像机所看到的和轨迹应该看起来的图像。例如，它可以识别丢失的将钢轨固定在轨枕上的Pandrol夹子。这是常见的故障。如果有事故记录，地面小组将替换他们。

总的来说,跟踪geometr NMT配备y system, laser track scanners, a high-resolution video camera, unattended geometry measurement system, and overhead line inspection systems. These are in addition to the PLPR system and a radio survey system which check coverage for theGSM-R communication system。

Train layout

在NMT的任一端，在43类电力车内的柴油电动发动机拉动火车。有一个会议区，座位12和火车船员的两个车厢。该监测发生在马车之后（开发教练和生产教练）。

Preventing faults

There are three main types of track defect that the NMT helps to prevent:

1. 扭曲–当两条轨道不再平行时。当一根铁轨稍微升高或下降时，会产生倾斜运动，使火车脱轨。
2. Cyclic top–轨道表面的倾斜导致车轮反弹。每一列火车经过铁轨表面，铁轨表面就会变得更糟。弹跳可能会导致轨道上其他地方受损，可能导致一系列下陷和脱轨。
3. Problems with gauge- NMT监视轨道的仪表（宽度），以防止它变得太宽或紧张。