Locomotive Operator Control Unit Location Tracking via RF Multiplexing
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Solution Overview
Problem
Existing systems face challenges in efficiently forwarding location information from operator control units to machine control units in 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 command data transmission.
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 channel. 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 channel is made multi-functional by enabling it to carry both command data and location data. The wireless communication device is configured to transmit multiple types of data through the same channel, making the channel universal for both control commands and location tracking purposes.
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 intervals determined by the machine control unit, allowing location tracking to be maintained while reducing overall bandwidth consumption compared to continuous transmission.
Solution Approach 2:
The machine control unit provides feedback to the operator control unit about when location data transmission is needed. This feedback mechanism allows the system to adjust transmission timing dynamically, transmitting location data only when necessary for accurate tracking while avoiding unnecessary bandwidth consumption during periods when location information is not needed.
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.