Hemispherical Elastic Protrusion for Pressure Direction Detection
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Solution Overview
Problem
Existing detection devices face issues in accurately detecting the direction and intensity of external pressure due to exposure of contacts, deviation of elastic bodies, and stress concentration at bonded surfaces, leading to detection errors and durability problems.
Innovation Solution
A detection device with a first substrate featuring pressure sensors and an elastic protrusion whose center of gravity aligns with a reference point, and a second substrate that the protrusion contacts, allowing for accurate detection of pressure direction and intensity by calculating differences in pressure values across sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If contacts are exposed on the surface of the pressure-sensitive element, then the structure is simple and easy to manufacture, but detection accuracy deteriorates due to opposite inclination of adjacent contacts causing detection errors
Solution Approach 1:
An elastic body is introduced as an intermediary component between the pressure-sensitive element and the external pressure. This elastic body deforms in response to applied pressure, causing the center of gravity to shift and thereby accurately indicating the pressure direction without requiring exposed contacts on the pressure-sensitive element surface.
2Strength
If the elastic body and pressure-sensitive element are not bonded, then stress concentration is avoided, but measurement precision deteriorates due to deviation of center of gravity from reference position
Solution Approach 1:
The elastic body serves as a mediator that transfers pressure information to the pressure-sensitive element without requiring direct bonding. The elastic body's deformation and center of gravity shift provide accurate pressure direction information while avoiding stress concentration at bonded surfaces.
3Stability of the object's composition
If the columnar body and pressure-receiving sheet are bonded, then structural stability is improved, but durability deteriorates due to stress concentration causing bonded surface collapse
Solution Approach 1:
The elastic body acts as an intermediary that eliminates the need for bonding between the pressure-receiving structure and the pressure-sensitive element. This avoids stress concentration at bonded surfaces while maintaining structural stability through the elastic body's inherent mechanical properties.
4Measurement precision
If multiple pressure sensors are disposed around a reference point, then detection capability is improved, but device complexity increases
Solution Approach 1:
The elastic body simplifies the detection system by providing a centralized mechanism (center of gravity shift) that interacts with multiple pressure sensors. This intermediary approach enables comprehensive pressure direction detection while maintaining relatively simple device structure compared to alternative multi-sensor configurations.
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
The device provides improved durability and accurate detection of external pressure direction and intensity, minimizing detection errors and stress concentration, while maintaining sensor alignment and reducing residual deviations.
Implementation Method 1
an elastic protrusion which is positioned so that a center of gravity of the elastic protrusion is disposed in a position which is overlapped with the reference point, and is elastically deformed by an external pressure
Data Source
AI summary
A first substrate that includes pressure sensors which are disposed in plural around a reference point; an approximately hemispherical elastic protrusion that is positioned so that the center of the elastic protrusion is approximately disposed in a position which is overlapped with the reference point, and is elastically deformed by an external force; and a second substrate that is separated from the elastic protrusion and installed on a side which is opposite to the first substrate are provided. When the external force is applied, a predetermined calculation is performed by using a pressure value which is detected through each pressure sensor, and the direction and the intensity of the applied external force are obtained.