Nested Vibration Sensor Housing for Impact Load Protection
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Solution Overview
Problem
Existing vibration detection devices are prone to damage from impact vibrations, which can compromise the internal elements.
Innovation Solution
A vibration detection device comprising a housing with specific openings, a substrate, a case, a detection element, a metal foil, and a sealing member, designed to absorb and distribute impact loads indirectly to the internal components, thereby protecting them from direct damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vibration detection device uses a conventional structure with direct mounting of detection elements on the substrate, then the device structure is simple, but the internal elements are easily damaged when impact vibration is applied
Solution Approach 1:
The patent implements a nested structure where the case is placed inside the housing, the detection element is inside the case, and the metal foil is inside the case. This nested arrangement protects internal elements by creating multiple protective layers, allowing the detection element to be isolated from direct impact while maintaining a compact overall structure.
Solution Approach 2:
The patent introduces intermediate protective structures between the housing and the detection element. The case acts as an intermediary container that houses the detection element, and the metal foil serves as an intermediary layer that can absorb and distribute impact forces. These intermediaries prevent direct transmission of impact forces to the detection element.
2Reliability
If the vibration detection device applies strong sealing to protect internal elements, then the protection against impact is improved, but the resonance and noise interference increases
Solution Approach 1:
The patent applies different properties to different parts of the sealing system. The sealing member provides strong sealing at the interface between housing and case to protect against impact, while the metal foil provides a compliant sealing surface that can absorb vibrations. This local differentiation of sealing properties allows protection without excessive resonance transmission.
Solution Approach 2:
The patent changes the physical parameters of the sealing components. The metal foil is made with specific thickness and material properties that allow it to seal effectively while dampening vibrations. The sealing member is designed with specific hardness and elasticity parameters that enable it to seal tightly against impact forces while absorbing rather than transmitting resonance frequencies.
Data Source
AI summary
A vibration detection device includes a housing, a substrate, a case, a detection element, a metal foil, and a sealing member. The housing includes a first opening portion and a second opening portion which is formed on a bottom surface of the first opening portion in a manner to open smaller than the first opening portion. The substrate is fixed to the bottom surface of the first opening portion to close the second opening portion. The case is fixed on a back surface of the substrate and is accommodated in the second opening portion with a bottom surface thereof opened. The detection element is fixed on the back surface of the substrate and is accommodated in the case. The metal foil is attached to the case to lid the bottom surface of the case. The sealing member seals the first opening portion.