Vehicle Communication System ID Setting Automation
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Solution Overview
Problem
Existing communication systems for vehicles require a long time to set IDs for slave devices and are prone to erroneous settings due to fixed connection order dependencies.
Innovation Solution
A communication system with a master device and slave devices that includes a writing device for transmitting IDs, output switches for power supply, and control units to sequentially set IDs for slave devices, reducing the need for repeated ID allocation and minimizing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ID is set each time a slave device is connected to the in-vehicle LAN, then the slave device can be properly identified and controlled, but the ID setting time becomes long and requires repeated configuration
Solution Approach 1:
The slave device automatically acquires the ID from the master device upon power-on, without requiring manual configuration or repeated setting. The ID is preliminarily assigned during device initialization, eliminating the need for time-consuming ID setting operations each time the device is connected.
Solution Approach 2:
The slave device autonomously obtains its ID from the master device through automatic acquisition mechanisms. The system performs self-configuration without external intervention, where the slave device automatically receives and stores the ID from the master device when powered on, reducing the need for repeated manual ID setting.
2Device complexity
If a fixed order of ID transmission is used from master device to slave device, then the ID assignment process is simplified, but erroneous ID setting occurs when the connection order of slave devices differs from the expected order
Solution Approach 1:
The system dynamically adapts to the actual connection order of slave devices. Instead of using a fixed predetermined order, the master device dynamically assigns IDs based on the sequence in which slave devices actually connect and power on, ensuring that the ID assignment matches the real-time system configuration and prevents erroneous settings.
Solution Approach 2:
The system uses feedback from the actual connection status and power-on sequence of slave devices to adjust the ID assignment process. The master device receives feedback about which slave devices are connected and in what order, then assigns IDs accordingly, ensuring accuracy even when connection orders vary from expectations.
Data Source
AI summary
A communication system capable of shortening a setting time of an ID and reducing an incorrect setting is provided. A writing device sequentially transmits an ID of a plurality of slave devices after transmitting of the ID of a master device. The master device includes a plurality of semiconductor relays provided for each of the plurality of master slave devices for supplying power to the corresponding slave devices. The master device receives the ID of the master device from the writing device, and sets it as its own ID. The master device, every time the ID of the plurality of slave devices is received from the writing device after setting the ID of its own, turns on the semiconductor relays in order. The plurality of slave devices sets the ID received after power supply as its own ID.