Rail Vehicle Event Detection System with Opto-Isolation
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Solution Overview
Problem
Trains lack integrated systems for detecting and recording critical events such as collisions, near collisions, and unsafe operating practices, which are essential for enhancing safety and operational efficiency.
Innovation Solution
A rail vehicle event detection system that includes an operator identity system, cameras, sensors, a processor, and a transceiver, capable of acquiring and recording visual and operational data, and communicating this information wirelessly to a remote computing device, while being electrically isolated from the rail vehicle using an opto-isolator to prevent voltage damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If trains are equipped with cameras and sensors for event detection, then safety and operational monitoring capability is improved, but device complexity and cost increase
Solution Approach 1:
The system is divided into independent functional modules: camera module for visual recording, sensor module for detecting collisions and unsafe practices, processor for analyzing data, and communication module for transmitting information. Each module operates independently but contributes to the overall safety monitoring function, making the complex system manageable and maintainable
Solution Approach 2:
The camera and sensor system serves multiple functions: detecting collisions, monitoring unsafe operating practices, recording visual evidence, and providing data for both immediate safety responses and long-term operational analysis. This multi-functionality justifies the added complexity by delivering comprehensive safety coverage
2Use of energy by moving object
If the event detection system is electrically connected to the rail vehicle, then power supply and data communication are improved, but vulnerability to voltage damage and electrical interference increases
Solution Approach 1:
An opto-isolator is introduced as an intermediary device between the event detection system and the rail vehicle's electrical system. This opto-isolator uses light transmission through an optical medium to transfer data and power signals while maintaining electrical isolation, thereby preventing voltage spikes and electrical interference from damaging the sensitive detection electronics
Solution Approach 2:
The patent replaces direct electrical connections with optical communication using the opto-isolator. By substituting electrical signal transmission with optical signal transmission, the system eliminates the harmful electrical coupling while maintaining the necessary data and power transfer functions
3Loss of information
If comprehensive event data is recorded and transmitted, then safety analysis capability is improved, but data transmission time and communication bandwidth requirements increase
Solution Approach 1:
The system continuously records events locally in the onboard memory before transmission is needed. When an event is detected or upon request, the pre-recorded data is quickly transmitted without requiring real-time data collection during the transmission window, thus maintaining data completeness while reducing transmission time
Solution Approach 2:
The system transmits only the necessary portion of recorded data based on the specific event type and analysis needs, rather than transmitting all continuously recorded data. This selective transmission approach maintains essential information completeness while significantly reducing the total data transmission time and bandwidth requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables real-time detection and recording of rail vehicle events, providing valuable data for safety analysis and operational improvement, enhancing safety and efficiency by identifying and addressing unsafe practices.
Implementation Method 1
The system may be electrically isolated from the rail vehicle via an opto-isolator, an optical isolation circuit, and/or other isolation components. The opto-isolator may transfer electrical signals between two isolated circuits (e.g., a rail vehicle circuit and a rail vehicle event detection system circuit) using light.
Data Source
AI summary
This disclosure relates to a system and method for detecting and recording rail vehicle events. The system comprises one or more cameras, one or more sensors, non-transient electronic storage, one or more physical computer processors, and/or other components. The one or more cameras may be configured to acquire visual information representing a rail vehicle environment. The one or more sensors may be configured to generate output signals conveying operation information related to operation of the rail vehicle. The non-transient electronic storage may be configured to store electronic information. The one or more physical computer processors may be configured to detect rail vehicle events based on the output signals and facilitate electronic storage of the visual information and the operation information for a period of time that includes the rail vehicle event in the non-transient electronic storage.