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Aug 25, 2022 · Small defects on the rails develop fast under the continuous load of passing trains, and this may lead to train derailment and other disasters. In recent years, many types of wireless sensor systems have been developed for rail defect detection.
Oct 16, 2023 · The systems use sensors, such as antennas, GPS receivers, and processing systems, to detect the radio waves (sferics) emitted by lightning channels. The systems then estimate the location and speed of the lightning bolt based on the time it takes for the frequency signal to reach the various antenna stations.
- The TD2S System
- Derailment Test
- Derailment Test Analysis
- Further Derailment Simulations
- Rams Analysis
In its first prototype configuration, the TD2S system is completely independent of rolling stock on-board systems, and consists of: 1. A pair of sensors engaged on the traction rod of the hook 2. An antenna on the top of the locomotive for data transmission and GPS reception 3. Accelerometers and inclinometers (IMU) mounted on the bushings of the w...
Derailment test activities took place at RFI’s Bologna San Donato plant in April 2021. Track 116 was made available by RFI for the derailment test and track 117 for parking and intervention of the rescue wagon in preparation for the recovery of the derailed bogie. The derailment test consisted of derailing the last bogie of the last wagon of the co...
The graphs shown in Figures 6a and 6b compare three free runs, and the derailment one highlighted in red. Figure 6a (in tonnes) reports the trend of the absolute values of the traction effort on the hook while Figure 6b reports the trend of the effort variation coefficient. It is evident that the derailment coefficients related to the derailment ru...
After the derailment test, further simulations were carried out with the data recorded in two years of normal operational freightservice of the locomotive. As regards the criteria for the simulation, we used the principle of the superposition of loads. We added to the values of the stresses detected during the journey performed in operation (Figure...
A Reliability, Availability, Maintainability and Safety (RAMS) analysis related to the TD2S system was also performed. This analysis is significant for defining the SIL safety degree of the TD2S system over time. In our case, the value of SIL 4 shown in Table 1 cannot be reached since the operations of stopping the train and making the line safe ar...
Nov 18, 2023 · One of the primary safety measures activated by crash sensors is the deployment of airbags. When a sensor detects a crash, it sends a signal to the vehicle’s airbag control module, which then triggers the inflation of the airbags at lightning speed.
Most process control or telemetry installations are interconnected by power and signal cables which run on trays, in ducting or via overhead poles. Light-ning strikes, static discharges and induction from power cabling are typical sources of transient voltages which can be coupled into signal cables and hence transmitted to electronic equipment.
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A lightning detection network is a great way to detect real-time lightning strikes because it has several sensors at least (ours has over 1,000!) We’ll break down how to detect lightning in 3 easy-to-follow steps.
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May 1, 2016 · The novel design meets the set of functional requirements for track switching solutions, in addition to offering several features that the current designs are unable to offer, in particular to enable multi-channel actuation and rail locking, and provide a degree of fault tolerance.
