External Microphone Dynamic Cover for Environmental Protection
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Solution Overview
Problem
Microphones installed on vehicle exteriors face challenges in withstanding environmental conditions such as wind, rain, snow, heat, and water pressure from car washes, requiring protection mechanisms to ensure functionality and durability.
Innovation Solution
An external microphone apparatus with a housing and sealing elements that can open to allow sound entry and close to protect the microphone from environmental conditions, utilizing a controller to activate a latch or actuation device to move the cover or lid into a closed position during conditions like car washing, and return to an open position when safe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the microphone is exposed to the external environment for sound detection, then sound detection capability is improved, but the microphone becomes vulnerable to environmental damage from wind, rain, snow, and car washes
Solution Approach 1:
The patent employs a movable cover that dynamically transitions between open and closed states based on environmental conditions. The cover is actuated by a latch mechanism that responds to triggers such as car wash detection, allowing the microphone to be protected when not in use and exposed when sound detection is needed, thus resolving the contradiction between reliability and environmental vulnerability
Solution Approach 2:
The system incorporates environmental sensors that automatically detect conditions such as car washes and trigger the cover closure mechanism without manual intervention. The microphone system serves itself by autonomously protecting against environmental damage through sensor-based activation of the latch mechanism, maintaining reliability while minimizing harmful exposure
2Object-affected harmful factors
If a protective cover is added to shield the microphone from environmental conditions, then protection from harmful factors is improved, but the device complexity increases due to additional components like movable covers and actuators
Solution Approach 1:
The cover serves multiple functions: it acts as a protective barrier against environmental elements, functions as an acoustic pathway when open, and integrates with the latch mechanism for automated operation. The housing also provides both structural support and environmental sealing. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining effective protection
Solution Approach 2:
The patent combines the protective cover, sealing elements, and latch mechanism into an integrated assembly that works as a unified system. The cover is merged with the housing structure, and the actuation mechanism is integrated within the same assembly, reducing overall complexity compared to having separate independent components for each function
3Object-affected harmful factors
If the cover is kept closed to protect the microphone, then protection from environmental conditions is improved, but sound detection capability deteriorates
Solution Approach 1:
The cover is designed to be dynamic rather than static, transitioning between closed and open states based on real-time environmental conditions and microphone operational status. The latch mechanism enables rapid switching between states, ensuring the microphone remains protected during adverse conditions while maintaining full sound detection capability when the cover is open and environmental conditions are favorable
Data Source
AI summary
A microphone apparatus for attachment to an exterior portion of a vehicle, the apparatus may include a housing maintaining a printed circuit board (PCB) and a microphone element positioned on the PCB, a sealing element arranged on one side of the housing and defining at least one housing opening, and a cover extending over the sealing element and defining a cover opening configured to align in an open state with the housing opening to enable ambient sound external to the vehicle to be transmitted to the microphone element, the cover configured to block the housing opening in a closed state to protect the microphone element.