Locomotive Operator Control Unit Location Tracking
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Solution Overview
Problem
Existing RF communication channels in locomotives are fully utilized for command data transfer, making it complicated and expensive to add another channel for forwarding operator control unit (OCU) location data to the machine control unit (MCU), which is essential for determining hazardous walking conditions and ensuring operator safety.
Innovation Solution
The OCU transmits location data through an existing RF channel by modifying the communication protocol to send location data only when command data messages are stable, allowing simultaneous transmission of command and location data without requiring an additional channel, and using multiple wireless radios to multiplex between different RF channels for efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If another RF communication channel is added to forward OCU location data to MCU, then location tracking capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines location data transmission with existing command data transmission by multiplexing both data types onto the same RF communication channel. The OCU transmits location information interspersed with command data packets, allowing the MCU to extract location data without requiring a separate dedicated channel for location communication.
Solution Approach 2:
The existing RF channel is made universal by enabling it to carry both command data and location data. The system modifies the communication protocol to allow the same physical channel to serve multiple purposes: controlling the locomotive and tracking operator location, thereby eliminating the need for additional specialized infrastructure.
2Measurement precision
If location data is transmitted continuously on existing RF channel, then location tracking accuracy is improved, but command data transmission efficiency decreases
Solution Approach 1:
Instead of continuous transmission, the system employs periodic location data transmission triggered by specific events. Location information is sent when the OCU enters predefined hazardous zones or at scheduled intervals, rather than continuously, thereby maintaining tracking accuracy while minimizing impact on command data transmission throughput.
Solution Approach 2:
The communication protocol dynamically adjusts transmission behavior based on operational conditions. The system monitors command data transmission status and adapts location data transmission timing accordingly, allowing flexible multiplexing that maintains both location tracking precision and command transmission efficiency under varying operational loads.
Data Source
AI summary
According to various aspects, exemplary embodiments are disclosed of devices, systems, and methods related to tracking location of operator control units for locomotives. In exemplary embodiments, a system includes an operator control unit configured to receive one or more commands from an operator for controlling a locomotive. The operator control unit includes a receiver configured to receive geographical location information of the operator control unit. The system is configured to monitor a geographical location of the operator control unit.