Locomotive Operator Control Unit Location Tracking via RF Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems face challenges in efficiently forwarding location information from operator control units to machine control units for locomotives due to bandwidth constraints in existing RF communication channels, making it complicated and expensive to add additional channels.
Innovation Solution
The operator control unit includes a wireless communication device that multiplexes and transmits command data and location data via the same or different RF channels, using techniques such as multiplexing, packet segmentation, and opportunistic transmission of location data when command data is stable, allowing location data to be sent without interfering with existing command data messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If additional RF communication channels are added to transmit location data, then location tracking capability is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines location data transmission with existing command data transmission by multiplexing both types of data through the same RF communication channels. The operator control unit transmits both command data and location data using the existing wireless communication infrastructure, eliminating the need for separate dedicated channels for location information.
Solution Approach 2:
The existing RF communication channels are made multi-functional by enabling them to carry both command data and location data. The wireless communication device is configured to transmit various types of data (commands, location information, feedback) through the same channel infrastructure, making the system more versatile without adding hardware complexity.
2Measurement precision
If location data is transmitted continuously, then location tracking accuracy is improved, but bandwidth consumption increases
Solution Approach 1:
The system transmits location data periodically rather than continuously. The operator control unit transmits location information at predetermined intervals or when specific conditions are met (such as when the operator enters a new zone or when location updates are requested by the machine control unit), reducing overall data volume while maintaining accurate tracking.
Solution Approach 2:
The system transmits location data selectively based on operational needs rather than continuously. Location updates are sent only when necessary (e.g., when command data transmission is stable, when the operator's position changes significantly, or when requested by the machine control unit), avoiding unnecessary bandwidth consumption while ensuring location information is available when needed.
3Productivity
If location data is multiplexed with command data, then RF channel utilization is improved, but data transmission reliability may be affected
Solution Approach 1:
The patent segments different types of data (command data and location data) into separate transmission opportunities within the same RF channel. The wireless communication device transmits command data and location data at different times or in different packets, allowing the machine control unit to process and prioritize each type of data appropriately while maintaining overall transmission reliability.
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 an exemplary embodiment, an operator control unit includes a user interface configured to receive one or more commands from an operator for controlling a locomotive. The operator control unit also includes receiver configured to receive location information of the operator control unit, and a wireless communication device. The wireless communication device is configured to transmit command data corresponding to the one or more commands and location data corresponding to the location information to a machine control unit on the locomotive.