Acoustic Sensor Package with Transducer Medium for Crash Detection
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Solution Overview
Problem
In vehicle crash-detection systems, existing sensor technologies face challenges in optimizing response time due to varying latencies associated with different sensor types and installation techniques, which can impact the timely deployment of safety devices like airbags.
Innovation Solution
The implementation of a sensor housing package that encloses the sensor component, filled with a transducer medium, and mounted to a rigid surface with a membrane to enhance signal reception speed, allowing for quicker detection of impact events through acoustical transfer mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional sensor installation techniques are used, then the installation process is simple, but the response time of the sensor is delayed
Solution Approach 1:
The sensor system is divided into separate functional components: the sensor element, the transducer medium-filled cavity, and the rigid surface mounting structure. This segmentation allows each component to be optimized independently for its specific function while maintaining overall system performance.
Solution Approach 2:
A transducer medium is introduced as an intermediary substance between the acoustic source and the sensor element. This medium optimizes the transfer of acoustic energy, enabling faster and more efficient signal transmission compared to direct air coupling.
2Adaptability or versatility
If multiple sensor types are used for different impact types, then detection capability is improved, but latency varies across sensor types
Solution Approach 1:
The acoustic sensor system is designed to detect multiple types of impact events (frontal collisions, side impacts, rear-end collisions) using a single sensor type and unified detection mechanism, eliminating latency variations between different sensor types while maintaining versatility through strategic sensor placement.
3Speed
If the sensor is enclosed in a housing with transducer medium, then signal reception speed is improved, but the housing structure becomes more complex
Solution Approach 1:
The housing incorporates an acoustically transparent membrane that allows acoustic waves to pass through while sealing the transducer medium inside. This thin film structure provides the necessary enclosure without significantly increasing structural complexity or blocking the acoustic signal path.
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 approach reduces the time for sensors to receive indications of events, improving the response time of safety systems and enhancing the protection provided by deploying safety devices more swiftly.
Implementation Method 1
improve the signal receive time to an acoustic sensor component... based on acoustical transfer mechanisms and techniques
Data Source
AI summary
Representative implementations of devices and techniques provide an improved signal receive time to a sensor component. The sensor component is enclosed within a package arranged to allow the sensor to potentially receive a signal in less time. The package may have a cavity, and the cavity may be at least partly filled with an acoustical transducer.