In-Vehicle Communication System Wireless ID Allocation
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Solution Overview
Problem
Existing in-vehicle communication systems face difficulties in easily allocating unique ID information to devices, especially when devices like seat belt systems are difficult to assemble or remove from vehicles, leading to increased costs and complexity due to the need for special tools and interfaces.
Innovation Solution
An in-vehicle communication system with a master control unit and slave devices, where the master control unit allocates unique identification information based on signals generated by buckle switches, allowing for wireless communication and operation without the need for special tools or interfaces, enabling easy ID allocation and device control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unique ID information is allocated using a dedicated tool after device installation, then ID allocation can be performed, but the process becomes difficult and time-consuming especially for seat belt devices that are hard to assemble or remove
Solution Approach 1:
The patent applies preliminary action by pre-registering identification information in the device before it is installed in the vehicle. This allows the ID to be automatically recognized and allocated when the device is installed, eliminating the need for time-consuming post-installation ID allocation operations using dedicated tools.
Solution Approach 2:
The device performs self-service by having its identification information automatically recognized and allocated through the registration unit. The system automatically matches the pre-registered ID with the installed device position, eliminating the need for manual intervention or dedicated tools for ID allocation.
2Adaptability or versatility
If special functions and interfaces are added to allocate ID information, then ID allocation becomes possible, but the device complexity and cost increase
Solution Approach 1:
The patent applies universality by using a general-purpose registration unit that can handle ID allocation for multiple types of devices (seat belts, airbags, seats) through a single interface. This multi-functional approach eliminates the need for device-specific allocation interfaces, reducing overall system complexity while maintaining versatility.
Solution Approach 2:
The control unit acts as an intermediary between the pre-registered ID information and the device installation status. It automatically matches and allocates IDs based on registration data without requiring special dedicated tools or complex interfaces, simplifying the ID allocation process.
3Reliability
If wire harness connection is used to connect host ECU and in-vehicle devices, then reliable communication is achieved, but the number of electric wires increases and installation difficulty increases
Solution Approach 1:
The patent extracts the communication function from the physical wire harness connection and implements it through wireless communication. This allows the host ECU and in-vehicle devices to communicate reliably without the complexity of multiple electric wires, while maintaining communication reliability through alternative wireless means.
Data Source
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AI summary
An in-vehicle communication system includes a master control unit mounted on a vehicle, a plurality of slave devices mounted on the vehicle, a plurality of buckles provided in association with each of a plurality of seats mounted on the vehicle, and at least one switch unit configured to generate a signal in accordance with an attachment and detachment state of at least one of the plurality of buckles. The master control unit is communicably connected to each of the slave devices. The master control unit controls the plurality of slave devices based on the signal generated by the at least one switch unit.