Swingable Terminal Board and Encoder for Gate Arm Position
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Solution Overview
Problem
Existing grade crossing gate systems face challenges in accurately adjusting the cam lobe assembly, leading to potential operational failures and safety issues due to the lack of precise measurement and difficult troubleshooting caused by the configuration of wire connections on a fixed terminal board.
Innovation Solution
A grade crossing gate mechanism with a swingable terminal board and an electronic sensor assembly, including an encoder and calibration gear, allows for precise angular position sensing and calibration of the gate arm shaft, and a user interface for easy operation and error diagnosis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cam lobe assembly is manually adjusted by rotating around the gate arm shaft, then the gate mechanism can be set to open and close contacts at desired angles, but there is no exact measurement of the angle and multiple adjustments are required with each requiring testing
Solution Approach 1:
The patent replaces the manual mechanical adjustment of cam lobe assembly with an electronic sensor assembly that includes an encoder and calibration gear. The encoder provides precise digital measurement of the gate arm shaft angular position, eliminating the need for manual rotation and visual estimation. The system automatically detects and reports the angular position, allowing for single-step precise adjustment without repeated testing.
2Ease of operation
If all wire connections are made on the front side of the terminal board for easy access, then wire routing is simplified, but it becomes difficult to diagnose or troubleshoot errors and ensure proper connections
Solution Approach 1:
The patent segments the terminal board into two functional sides: the front side maintains easy wire access for connections, while the rear side provides diagnostic access points. This segmentation allows different operations (connection-making and troubleshooting) to be performed from opposite sides of the terminal board, eliminating the conflict between ease of connection and ease of diagnosis.
3Reliability
If the cam lobe assembly is not adjusted properly, then the crossing gate system may not operate properly, but manual adjustment provides no exact measurement leading to potential safety issues
Solution Approach 1:
The patent implements a feedback mechanism where the encoder continuously monitors the angular position of the gate arm shaft and provides digital feedback to the control system. This feedback allows the system to verify proper adjustment, confirm correct contact opening/closing angles, and ensure safe operation. The precise measurement eliminates guesswork in adjustment and provides verifiable confirmation of proper system configuration.
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
This solution enhances the accuracy and safety of the grade crossing gate system by enabling precise adjustments and easy troubleshooting, reducing the time required for maintenance and ensuring proper operation.
Implementation Method 1
an encoder coupled to the calibration gear for detecting an angular position of the gate arm shaft
Implementation Method 2
a calibration gear coupled to the gate arm shaft for calibration of the gate mechanism
Data Source
AI summary
A crossing gate mechanism includes a gate mechanism enclosure defining an interior space, external wires located substantially outside the gate mechanism enclosure, and a terminal board positioned within the interior space of the gate mechanism enclosure. The external wires are connected to the terminal board. The terminal board is coupled to and swingable relative to the gate mechanism enclosure.