Multi-Function Dragger for Railroad Track Fault Detection
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Solution Overview
Problem
Existing railroad track detectors, such as static dragging equipment detectors, are limited in their ability to detect multiple fault conditions like flat wheels and derailments, and suffer from false alarms due to fixed sensor configurations and speed-dependent detection thresholds.
Innovation Solution
A multi-function dragger equipped with sensors oriented at various angles relative to the horizontal plane, a controller to process signals from these sensors, and a method to determine fault conditions by adjusting thresholds based on train speed, enabling detection of impacts in multiple directions and reducing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sensors are oriented at fixed horizontal positions to detect low hanging equipment, then detection of dragging equipment is achieved, but detection of other fault conditions such as flat wheels or derailment is not possible
Solution Approach 1:
The patent applies multi-functionality by equipping the dragger with sensors oriented at multiple angles (including vertical and diagonal orientations) so that a single device can detect multiple fault conditions: low hanging equipment, flat wheels, and derailments. This eliminates the need for separate detection systems for each fault type.
Solution Approach 2:
The patent transitions from single-axis horizontal sensors to multi-dimensional sensor arrangement by adding vertical and diagonal sensor orientations. This dimensional expansion enables the detection system to capture impact forces from multiple directions simultaneously, achieving versatile fault detection with a unified sensor platform.
2Ease of operation
If a fixed alarm threshold is used to detect impacts, then detection simplicity is maintained, but false alarms occur at high speeds and missed detections occur at low speeds
Solution Approach 1:
The patent implements dynamic threshold adjustment where the alarm threshold is no longer fixed but varies based on train speed. The controller automatically modifies the threshold level according to the detected speed, ensuring reliable detection across different operating conditions without requiring manual recalibration.
Solution Approach 2:
The patent changes the detection parameter (alarm threshold) dynamically based on another parameter (train speed). This parameter coupling allows the system to adapt its sensitivity to operational conditions, maintaining high detection accuracy whether the train is moving slowly or at high speed.
3Reliability
If single axis sensors are used to avoid false alarms from vertical vibrations, then false alarm reduction is achieved, but detection of vertical impact forces such as flat wheels is not possible
Solution Approach 1:
The patent segments the sensor measurement capability by using multiple single-axis sensors oriented at different angles (horizontal, vertical, diagonal) rather than relying on a single multi-axis sensor. Each sensor detects impacts in its specific orientation, and the controller integrates information from all sensors to distinguish between different fault types, reducing false alarms while maintaining comprehensive detection.
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
The dragger effectively detects flat wheels, loose equipment, and derailments, while minimizing false alarms by using angled sensors and adaptive threshold settings, ensuring safer railroad operations across varying train speeds.
Implementation Method 1
Each of the plurality of sensors may be oriented at an angle relative to a horizontal plane... generate a plurality of signals corresponding to impact forces acting in a plurality of directions
Data Source
AI summary
The present disclosure is directed to a dragger. The dragger may have a plurality of sensors configured to be located adjacent a railroad track. Each of the plurality of sensors may be oriented at an angle relative to a horizontal plane. The dragger may also have a controller in communication with the plurality of sensors. The controller may be configured to receive signals from the plurality of sensors, determine a parameter based on at least one of the received signals, and detect a fault condition when the parameter exceeds a threshold.