A2B Interface for Distributed Vehicle Noise Management
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Solution Overview
Problem
Current automotive noise management systems require all sensor outputs to be connected to a single Noise Management (NM) module, leading to increased wiring costs, vehicle weight, and processing latency, limiting system architecture.
Innovation Solution
Implementing an automotive audio bus (A2B) interface that allows multiple noise cancellation and enhancement (NCE) controllers to be connected in a daisy-chain configuration, enabling each controller to perform different noise management signal processing operations simultaneously, reducing the need for extensive wiring and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all sensor outputs are connected to a single NM module, then noise management processing can be performed, but wiring costs and vehicle weight increase
Solution Approach 1:
The patent divides the single NM module into multiple distributed NCE controllers (first NCE controller, second NCE controller, etc.), each capable of performing noise management processing independently. This segmentation eliminates the need for extensive wiring to a single central module, thereby reducing wiring weight while maintaining noise management functionality.
Solution Approach 2:
Each NCE controller is designed with universal functionality to perform multiple noise management operations (noise cancellation, noise masking, etc.). This multi-functionality allows each controller to handle various sensor inputs and output types, replacing the need for a single comprehensive NM module and reducing overall wiring requirements.
2Reliability
If all sensor outputs are connected to a single NM module, then noise management processing can be performed, but processing latency increases
Solution Approach 1:
By segmenting the single NM module into multiple distributed NCE controllers, the patent enables parallel processing of different noise signals simultaneously. This parallel architecture reduces the processing queue and latency that would occur in a single centralized module, as each controller can process its assigned sensors independently and concurrently.
3Reliability
If all sensor outputs are connected to a single NM module, then noise management processing can be performed, but system architecture flexibility is limited
Solution Approach 1:
The patent segments the noise management system into independent NCE controllers that can be distributed throughout the vehicle architecture. This segmentation enables flexible system design where controllers can be strategically placed near relevant sensors and actuators, improving signal quality and reducing latency while enhancing overall system adaptability.
Solution Approach 2:
The distributed NCE controller architecture enables dynamic configuration where different controllers can be activated or deactivated based on operating conditions. This dynamic adaptability allows the system to flexibly allocate processing resources and adjust noise management strategies in real-time, enhancing system versatility.
4Weight of stationary object
If multiple NCE controllers are used with A2B interface, then wiring is reduced and processing is parallelized, but device complexity increases
Solution Approach 1:
The patent employs the A2B audio bus interface as a universal communication protocol connecting multiple NCE controllers to the audio processing system. This standardized multi-functional interface simplifies the overall system architecture by providing a common communication pathway, reducing the need for separate dedicated wiring for each controller while enabling parallel processing capabilities.
Data Source
AI summary
A vehicle includes at least one sensor and a body having an exterior portion and an interior portion. The sensor is configured to detect noise existing in the exterior portion and the interior portion, and to output at least one noise signal indicative of the detected noise. The vehicle further includes at least one noise cancellation and enhancement (NCE) controller and an automotive audio bus (A2B) interface. One or more of the NCE controllers are configured to perform at least one noise management signal processing operation based on the at least one noise signal. The automotive audio bus (A2B) interface receives the at least one noise signal and delivers the at least one noise signal to the at least one NCE controller.