Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
機場捷運機廠維修設備軌道量測車原理簡介及功能展示 Introduction and Function Demonstration of the TIAA MRT Depot Maintenance Facilities- Rail Measurement & Recording Vehicle
軌道量測車。

軌道量測車之主要功能為量測軌道之磨耗情形,營運單位可依據量測結果,採取適當之因應或解決對策,以維持電聯車行車安全。
軌道量測車具備雙向行駛與行車動力,整合模組化的檢測系統安裝於其上,使用非接觸雷射系統量測鋼軌磨耗情形,利用雷射及每秒4,500幅高速攝影機與鋼軌形成三角形相對位置,利用三角函數計算鋼軌磨耗。
利用雷射為單一波長光源特性,將雷射照射於鋼軌時,因鋼軌表面凹凸不平整,雷射會形成不同的反射角度,再透過高速COMS感應器擷取鋼軌影像,在COMS感應器的每一點畫素對應不同的灰階值,藉由數值分析可以得到凹凸的大小程度及數量,當越凹凸不平整的時候,其數值將相對變化劇烈。
為了避免其他雜訊光源影響量測數值,COMS感應器前需裝設高頻濾光鏡,以阻擋過濾其他短波長光源,即使在陽光強烈狀態下仍舊可量測鋼軌。COMS感應器內有8顆數位訊號處理器(Digital Signal Processor, DSP),以64位元並列輸出數值資料,正因為有高速取樣頻率 (每秒4,500幅),所以軌道量測車可在15 km/h,每隔2mm進行一次取樣分析。
本檢測系統可以量測軌道左右鋼軌的軌距、線形、縱向水平、橫向水平、超高(傾斜度)、扭曲、鋼軌皺摺(短、中、長)、縱向磨耗、鋼軌輪廓、鋼軌側向磨耗及踏面磨耗等,提供圖像化及視覺化監測及量測記錄數據之輸出,讓營運維修單位瞭解全線軌道的狀態,採取適當之維修安排。

The main function of the rail measurement & recording vehicle is to measure the wearing condition of the rail. The operating unit may take appropriate responses or resolving countermeasures according to the measurement results to maintain the safety of the EMUs.
The rail measurement & recording vehicle has two-way driving and operating power, which is integrated with a modular detection system. The vehicle used non-contact laser system to measure the situation of rail wearing conditions by forming a relative triangle position from the laser, 4,500 frames per second high-speed camera and the rail and then calculate the rail wear by using triangulation principle.
Using the coherent optical characteristic of laser, a single wavelength light source, the laser would form a different reflection angle when irradiating on the uneven surface of the rail. Then, the rail image will be captured through the high-speed COMS sensor in which each point of the pixel will correspond to a different gray value at the COMS sensor end and the degree and the number of bumps can be acquired by numerical analysis. When the surface is more uneven, its value will be relatively volatile.
In order to avoid other noise sources that may affect the measured value, the high pass band filter needs to be installed before the COMS sensor to block and filter other short wavelength light sources. This way, measurement of the rail can still be achieved even under strong sunlight. The COMS sensor has 8 DSP digital signal processors and outputs numerical data by 64-bit parallel. Due to the high speed sampling rate (4,500 frames per second), the rail measurement & record vehicle takes samples every 2 mm at 15 km/h.
The examination system can measure the gauge, alignments, longitudinal level, lateral level, cant, twist, rail corrugation (short, middle, long), longitudinal wear, rail profile, rail side wear and tread wear measurements of the left and right rail. The system can provide visualization, visual monitoring and output of the measurement data, so that the operation and maintenance units can grasp the status of the whole rail line and take appropriate maintenance arrangements.

  • 軌道量測車-軌道幾何偵測單元硬體。
  • 非接觸雷射系統示意圖。
  • 平均移動波鋒(線性圖)。
  • 平均移動波鋒(條狀圖)。
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