Gateway Interface Control for Safe Work Machine CAN Commands
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Solution Overview
Problem
Current remote control systems for work machines, such as forestry equipment, can inadvertently send conflicting commands or override safety protocols, posing safety risks and potentially damaging the CAN bus when aftermarket accessories are manually hardwired into the system.
Innovation Solution
A gateway interface controller is introduced that isolates accessories from directly accessing the CAN bus, filters valid signals from invalid ones, and provides a verification process before allowing remote control commands to be executed, preventing unsafe operations and protecting sensitive information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If remote control systems are directly connected to the CAN bus, then remote control functionality is achieved, but safety risks and potential damage to the CAN bus occur
Solution Approach 1:
The gateway interface controller serves as an intermediary device between the remote control system and the CAN bus. It receives commands from remote controls, validates them against safety criteria, and only transmits approved commands to the CAN bus. This mediator architecture enables remote control functionality while preventing unsafe commands from reaching the bus, thus resolving the contradiction between ease of operation and reliability.
2Adaptability or versatility
If aftermarket accessories are manually hardwired into the CAN bus, then remote control capability is added, but conflicting commands and bus damage occur
Solution Approach 1:
The gateway interface controller acts as a protective intermediary that allows aftermarket accessories to integrate with the CAN bus without direct hardwiring. The gateway validates all commands from these accessories, filtering out harmful or conflicting commands before they reach the bus. This enables versatile accessory integration while preventing bus damage.
Solution Approach 2:
The gateway interface controller performs preliminary validation of commands before they are transmitted to the CAN bus. By checking commands against predefined safety criteria and validation rules in advance, the system prevents harmful actions from occurring, thus protecting the bus while maintaining accessory adaptability.
3Productivity
If remote control commands are executed without verification, then operational speed is maintained, but unsafe operations occur
Solution Approach 1:
The gateway interface controller performs verification of remote control commands through preliminary action. It checks each command against safety criteria and validation rules before execution, ensuring safe operations. The automated validation process maintains operational speed by quickly assessing command safety without requiring manual intervention for each command.
Data Source
AI summary
A gateway interface controller for a work machine includes a CAN bus interface component configured to communicate over a CAN bus of the work machine. The gateway interface controller includes message logic configured to process a request signal, indicative of a requested work machine action, that is received from a remote control, wherein the message logic validates the request signal based on a validation criterion. The gateway interface controller includes command generator logic configured to, based on the validation, generate a CAN signal that corresponds to the request signal and communicate the CAN signal over the CAN bus.