Contactless Sensor Mounting Vibration Isolation Bracket
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Solution Overview
Problem
Contactless sensors mounted in vehicle interior components, such as seats, experience degraded sensing performance due to vibration transmission, which interferes with accurate signal processing and noise component separation, particularly affecting radar pulse sensors used for monitoring driver health metrics.
Innovation Solution
A contactless sensor mounting system that includes a bracket with a main opening for the sensor, a first buffer member to absorb vibration, and a leaf spring to press the sensor toward the interior component, minimizing vibration transmission through the use of a second buffer member and snap-fitting mechanisms to secure the sensor in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the contactless sensor is mounted directly in the interior component, then the mounting structure is simple, but vibration is transmitted to the sensor which degrades sensing performance
Solution Approach 1:
The patent introduces buffer members as intermediary elements between the contactless sensor and the interior component. These buffer members absorb and isolate vibrations, preventing them from reaching the sensor. The bracket serves as another intermediary structure that provides a stable mounting platform while decoupling the sensor from direct vibration sources in the interior component.
Solution Approach 2:
The buffer members are pre-installed in the mounting structure to provide vibration cushioning before the sensor is exposed to vibrations. This beforehand cushioning approach ensures that vibration isolation is already in place, protecting the sensor from degradation of sensing performance before the problem occurs.
2Measurement precision
If vibration isolation measures are added to protect the sensor, then sensing performance is improved, but the mounting structure becomes more complex
Solution Approach 1:
The patent merges multiple functions into integrated components. The bracket combines mounting, positioning, and vibration isolation functions. The buffer members are integrated into the mounting structure rather than being separate add-on components. This merging approach reduces overall structural complexity while maintaining vibration isolation benefits.
Solution Approach 2:
The buffer members utilize flexible material properties to provide vibration isolation. By using elastic or viscoelastic materials, the structure achieves vibration damping without requiring complex rigid mechanisms. This flexible approach simplifies the overall mounting structure while effectively protecting the sensor.
3Reliability
If the sensor is firmly fixed to ensure stability, then mounting reliability is improved, but vibration transmission to the sensor increases
Solution Approach 1:
The bracket acts as an intermediary mounting structure that provides reliable mechanical support while decoupling the sensor from direct vibration transmission paths. The buffer members serve as intermediaries that maintain firm connection while filtering out harmful vibrations, thus achieving both mounting reliability and vibration isolation.
Solution Approach 2:
The mounting structure employs composite construction combining rigid elements (bracket) for structural reliability and flexible elements (buffer members) for vibration isolation. This composite approach allows the structure to simultaneously achieve firm fixation and vibration attenuation, resolving the contradiction between mounting reliability and vibration transmission.
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 configuration effectively reduces vibration transmission to the sensor, enhancing its sensing performance by minimizing noise interference and allowing for accurate measurement of driver health metrics like heart rate and respiration.
Implementation Method 1
a first buffer member interposed between the first surface of the contactless sensor and the interior component
Implementation Method 2
a leaf spring pressing the second buffer member and the contactless sensor toward the interior component
Data Source
AI summary
A contactless sensor mounting system for a vehicle is provided. The system includes a contactless sensor that is mounted in an interior component of the vehicle and having a first surface and a second surface opposing each other. A bracket is disposed around the contactless sensor and is fixed to the interior component. A first buffer member is interposed between the first surface of the contactless sensor and the interior component. A second buffer member is mounted on the second surface of the contactless sensor. Additionally, a leaf spring presses the second buffer member and the contactless sensor toward the interior component.