On-Vehicle Apparatus Voltage Threshold Control
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Solution Overview
Problem
Conventional on-vehicle apparatuses face communication disruptions and control instability when battery voltage decreases, as they individually set voltage thresholds for operation and communication, leading to complex control mechanisms and potential inability to communicate with other apparatuses.
Innovation Solution
An on-vehicle apparatus with a communication unit and controller that operates in different modes based on battery voltage thresholds, allowing communication with other apparatuses when the voltage is above a minimum communication threshold, even if it cannot control its target, thereby maintaining connectivity and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a low voltage range is provided between recommended minimum operation-voltage and operation stop voltage to identify causes, then the diagnostic capability is improved, but the device complexity increases
Solution Approach 1:
The patent extracts the communication status determination function from the operation control logic by using a separate second voltage threshold. This extraction simplifies the overall control system by separating communication monitoring from operation control, eliminating the need for complex interactions while maintaining diagnostic capability through the distinct threshold comparison.
Solution Approach 2:
The patent creates a universal communication status determination mechanism that can be applied across different on-vehicle apparatuses. By using the second voltage threshold for communication status determination in a standardized manner, the system achieves multi-functionality where the same mechanism serves both diagnostic and communication coordination purposes across the network.
2Reliability
If a representative on-vehicle apparatus stores information of recommended minimum operation-voltage of other apparatuses and detects voltage values, then the communication monitoring is improved, but the device complexity increases
Solution Approach 1:
The patent implements self-service by having each on-vehicle apparatus independently determine its own communication status using its second voltage threshold. Each apparatus autonomously compares its detected battery voltage with its predetermined second voltage threshold to determine communication status, eliminating the need for a representative apparatus to store and manage voltage information for other devices.
Solution Approach 2:
The patent merges the communication status determination function into each individual on-vehicle apparatus by equipping each with its own second voltage threshold and comparison logic. This merging distributes the monitoring capability across all apparatuses rather than concentrating it in a single representative device, simplifying the overall system architecture while maintaining comprehensive communication monitoring.
Data Source
AI summary
An on-vehicle apparatus according to an embodiment includes a communication unit that communicates with another on-vehicle apparatus, and a controller that is communicatively coupled to the other on-vehicle apparatus through the communication unit and performs an operation mode in which the controller controls a control target when a supply voltage value is equal to or larger than a first threshold. The controller is able to communicate with the other on-vehicle apparatus through the communication unit when the supply voltage value is equal to or larger than a second threshold which is smaller than the first threshold.