Secondary Control Device for Work Machine Error Detection

The patent creates a duplicate copy of the critical processing logic within the monitoring circuit. The monitoring circuit independently executes the same processing algorithm on received data and compares its results with the controller's output. This copying approach enables reliability verification without requiring complex communication protocols or additional sophisticated components, thus improving reliability while controlling system complexity.

The monitoring circuit acts as an intermediary between the controller and the actuator. It receives both the controller's output signals and the original input data, performs independent verification, and then determines whether to pass through the control signals or block them based on validation results. This intermediary role enables reliability monitoring while maintaining a relatively simple system architecture compared to more invasive monitoring approaches.

The monitoring circuit performs preliminary verification of control information validity in parallel with the controller's normal operation. By continuously monitoring and validating data as it flows through the system rather than performing post-processing simulation checks, the system ensures reliability without adding sequential processing delays that would impact acceleration performance.

The monitoring circuit performs only the essential verification steps needed to detect invalid control information, rather than executing a complete simulation of the control algorithm. This partial action approach focuses on critical validation points (comparing controller output with expected results based on input data) without replicating all processing steps, thus maintaining reliability while minimizing processing time overhead.

The patent segments the monitoring function from the main controller's processing tasks. The monitoring circuit is implemented as a separate, dedicated component that independently validates control information without burdening the main controller. This segmentation allows the controller to focus on primary control functions and maintain high processing efficiency while the monitoring circuit handles validation in parallel, thus improving reliability without reducing controller productivity.

The monitoring circuit serves as an intermediary layer that handles the overhead of reliability verification. By offloading the simulation parameter processing and validation tasks to this intermediate component, the main controller avoids the productivity loss that would result from handling monitoring tasks itself. The intermediary monitoring circuit processes validation data in parallel, ensuring reliability while preserving the controller's processing efficiency for primary control functions.