Roof Sensor Module Audio Receiver Layout for Siren Direction Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Autonomous vehicles face challenges in accurately localizing sirens and other noises due to interference from wind and vehicle vibrations, which can hinder their ability to navigate safely and respond appropriately to emergency situations.
Innovation Solution
The strategic arrangement of recessed external audio receivers on a vehicle sensor module, positioned to minimize noise interference, allows for clearer detection of sounds from various directions, enabling the vehicle to determine the direction and proximity of sirens and other noises, and facilitating appropriate control strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If microphones are positioned externally on the vehicle to detect audio from various directions, then the ability to localize sirens and noises is improved, but noise interference from wind and vehicle vibrations increases
Solution Approach 1:
The audio detection system is segmented into multiple microphones positioned at different locations and orientations on the sensor module. Each microphone captures audio from specific directions, allowing the system to segment the audio environment into directional components. This segmentation enables the system to identify and localize sound sources while compensating for wind and vibration noise that affects microphones differently based on their positions.
Solution Approach 2:
Different microphones are positioned with different local qualities - some extend into the bottom surface, others into side surfaces, creating varied exposure to wind and vibration. The system exploits these local quality differences by weighting and processing signals from each microphone according to its specific noise characteristics, thereby improving overall audio detection accuracy while accounting for position-specific noise interference.
2Measurement precision
If multiple microphones are strategically arranged on the sensor module to minimize noise interference, then the clarity of audio detection is improved, but the device complexity increases
Solution Approach 1:
Multiple microphones with different orientations and positions are merged into a single sensor module assembly. The microphones are integrated into the module's housing structure, which provides mechanical support and electrical connections. This merging approach consolidates the complexity into a modular unit that can be installed as a single component, reducing the overall system complexity while maintaining the benefits of multiple strategically positioned microphones.
Solution Approach 2:
The sensor module serves multiple functions: it houses various sensors for autonomous navigation and simultaneously integrates the audio detection system with strategically arranged microphones. The module's housing and mounting structure are designed to accommodate both the audio microphones and other sensors, creating a universal platform that reduces overall device complexity by consolidating multiple functions into a single integrated unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the vehicle's ability to detect and respond to emergency vehicles and other auditory cues, improving safety by reducing noise interference and enabling timely actions such as pulling over to clear the path.
Implementation Method 1
the first microphone extends into a given portion of the bottom surface of the sensor module proximate the gap, a second microphone extending into a first side of the sensor module such that the second microphone is configured to detect audio originating from an environment extending from a first side of the vehicle, and a third microphone extending into a second side of the sensor module such that the third microphone is configured to detect audio originating from the environment extending from a second side of the vehicle
Data Source
AI summary
Example embodiments relate to vehicle sensor modules with external audio receivers. An example sensor module may include sensors and can be coupled to a vehicle's roof with a first microphone positioned proximate to the front of the sensor module. The sensor module can also include a second microphone extending into a first side of the sensor module such that the second microphone is configured to detect audio originating from an environment located relative to a first side of the vehicle and a third microphone extending into a second side of the sensor module such that the third microphone is configured to detect audio originating from the environment located relative to a second side of the vehicle, wherein the second side is opposite of the first side.