Vehicle Sensor Data Transmission Order for Low-Delay Serial Control
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Solution Overview
Problem
Existing vehicle controller systems face challenges in efficiently transmitting large volumes of sensor data at limited transmission rates, leading to potential delays and instability in data processing and control, particularly when dealing with a high number of sensors and varying data priorities.
Innovation Solution
A vehicle controller system that includes a data collecting unit, a serial communication line, and a transmission order setting unit, which sets an advance transmission order for sensor data based on operation conditions such as crank angles, ensuring that only necessary data is transmitted when needed, reducing overlap and delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If serial transmission is used to transmit sensor data from multiple sensors, then the number of harnesses is reduced, but transmission delay increases when large volumes of data are transmitted at limited transmission rates
Solution Approach 1:
The patent applies preliminary action by pre-determining transmission priorities of sensor data based on operation conditions (such as engine state, vehicle speed, acceleration) before actual transmission occurs. The ECU stores priority information in advance, so when data transmission is needed, the system can immediately retrieve and execute the predetermined priority sequence without real-time calculation delays, thus reducing transmission delay while maintaining harness reduction benefits
Solution Approach 2:
The patent implements dynamics by making the transmission priority sequence variable based on operation conditions. Different operation conditions (idling, acceleration, deceleration, constant speed) trigger different priority arrangements. This dynamic adjustment allows the system to optimize data transmission efficiency for each specific operating scenario, reducing overall transmission delay while keeping the number of harnesses minimal
2Productivity
If priority determination is performed for each sensor data transmission request, then data transmission efficiency is improved, but the number of determination operations increases causing extensive delay for low priority data
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing priority information for each sensor data type based on various operation conditions. Instead of performing complex priority determination operations for every transmission request, the system retrieves pre-stored priority information, dramatically reducing the number of determination operations and the time consumed, while maintaining high data transmission efficiency
Solution Approach 2:
The patent implements partial action by performing full priority determination only when operation conditions change. When conditions remain stable, the system uses pre-determined priority sequences without re-evaluation. This selective approach reduces the frequency of determination operations and minimizes time consumption while preserving transmission efficiency for critical data
3Adaptability or versatility
If transmission priority is dynamically adjusted based on operation conditions, then data transmission relevance is improved, but transmission delay variability increases causing data processing instability
Solution Approach 1:
The patent applies preliminary action by pre-determining priority sequences for each operation condition and storing them in advance. This ensures that even though priorities are adjusted dynamically, the transitions follow predetermined, stable patterns rather than random variations. The ECU switches between pre-calculated priority sequences based on operation conditions, maintaining stability in data processing while preserving adaptability to different operating scenarios
Solution Approach 2:
The patent implements parameter changes by systematically varying transmission priorities according to defined operation condition parameters (engine state, vehicle speed, acceleration). These parameter-based adjustments follow consistent rules and thresholds, ensuring that priority changes are predictable and controlled. This approach maintains data processing stability while achieving adaptability to different operating conditions
Data Source
AI summary
A vehicle controller includes a plurality of detectors, a control unit, a data collecting unit, a serial communication line, and a transmission order setting unit. Data that changes at a speed that is lower than a given speed value is transmitted in a period in which a communication volume is lower than a given communication volume value. The transmission order is an order in which the pieces of detection data are serially transmitted from the data collecting unit to the control unit.