Vehicle Microprocessor Abnormality Detection via Sensor Request Signals
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Solution Overview
Problem
In vehicle-mounted equipment control devices with multiple microprocessors, determining the cause of signal unavailability between microprocessors is challenging, as it cannot distinguish between communication abnormalities and microprocessor abnormalities.
Innovation Solution
Incorporating a second sensor data request signal and inter-microcomputer communication units to allow the first microprocessor to diagnose abnormalities in the second microprocessor based on sensor data and communication signals, enabling accurate determination of microprocessor abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the first microprocessor communicates with the second microprocessor to obtain information, then the system can share data between microprocessors, but it becomes impossible to distinguish between communication abnormalities and microprocessor abnormalities when signals are lost
Solution Approach 1:
The patent introduces a sensor data request signal as an intermediary diagnostic tool. The first microprocessor requests sensor data from the second microprocessor, and the response (or lack thereof) serves as a mediator to indicate the health status of the second microprocessor. This intermediary mechanism enables indirect assessment of microprocessor functionality without direct intervention.
Solution Approach 2:
The system implements a feedback mechanism where the first microprocessor sends sensor data request signals to the second microprocessor and evaluates the responses. The feedback loop includes: requesting sensor data, receiving (or not receiving) the data, and determining abnormality based on the feedback. This closed-loop feedback enables continuous monitoring and accurate abnormality detection.
2Device complexity
If the system uses only communication signals between microprocessors for diagnosis, then the system remains simple, but it cannot accurately determine whether an abnormality exists in a microprocessor
Solution Approach 1:
The second microprocessor serves itself by responding to sensor data requests from the first microprocessor. Instead of requiring an external diagnostic system, the second microprocessor demonstrates its functionality by providing sensor data or failing to respond. This self-service approach enables the system to diagnose microprocessor health using existing components without adding external diagnostic equipment.
Solution Approach 2:
The system performs preliminary diagnostic actions by continuously requesting sensor data from the second microprocessor before actual abnormalities affect system operation. The first microprocessor proactively checks the status of the second microprocessor through regular sensor data requests, enabling early detection of issues before they escalate.
Data Source
AI summary
A control device for vehicle-mounted equipment according to the present invention includes a first sensor, a second sensor, a first microprocessor, and a second microprocessor. The second microprocessor generates a second sensor data request signal for requesting the second sensor to transmit second sensor data. The first microprocessor determines whether an abnormality has occurred in the second microprocessor based on the second sensor data or the second sensor data request signal, and based on a signal relating to information on the second microprocessor which is transmitted from a second inter-microcomputer communication unit of the second microprocessor.