Elastic Projection Detection Device for Pressure Direction
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Solution Overview
Problem
Existing detection devices cannot accurately measure the direction and intensity of external pressures with high precision, particularly in applications involving sliding forces, due to limitations in pressure distribution detection and deformation measurement.
Innovation Solution
A detection device comprising a first substrate with pressure sensors and a second substrate with elastic projections that deform under external pressure, allowing for precise calculation of pressure direction and intensity by differentiating pressure values detected by sensors, with symmetrically disposed pressure sensors and elastic projections to simplify calculations and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pressure distribution detection methods are used, then the device structure is simple, but the measurement precision of external pressure direction and intensity is insufficient
Solution Approach 1:
The detection device divides the pressure sensing function into multiple independent pressure sensors arranged in a matrix pattern on the first substrate. This segmentation allows each sensor to detect local pressure changes, enabling the system to determine both the direction and intensity of external pressure by analyzing the pressure distribution pattern across multiple sensors, thereby improving measurement precision without requiring a single complex sensor element.
Solution Approach 2:
The elastic projection acts as an intermediary element between the external pressure source and the pressure sensors. When external pressure is applied, the elastic projection deforms and transmits this force to the pressure sensors, converting the external mechanical pressure into measurable electrical signals. This intermediary mechanism enables precise detection of pressure direction and intensity while maintaining a relatively simple overall device structure.
2Measurement precision
If protrusions are used to detect external pressure, then the device can detect three-dimensional force vectors, but the detection limit is defined by the degree of deformation of protrusions
Solution Approach 1:
The invention replaces the mechanical deformation-based detection method with an electrical sensing method. Instead of relying on the physical deformation of protrusions to detect pressure, the system uses pressure sensors that convert mechanical pressure into electrical signals. This substitution eliminates the limitation of deformation-based detection and enables more precise measurement of external pressure direction and intensity across a wider range of pressure magnitudes.
Solution Approach 2:
The system changes the detection parameter from the physical deformation degree of protrusions to the electrical signal output of pressure sensors. By measuring the pressure values detected by multiple sensors and analyzing their distribution patterns, the system can determine external pressure characteristics with higher precision and over a broader range, overcoming the detection limit imposed by the deformation capacity of mechanical protrusions.
3Measurement precision
If pressure sensors are disposed symmetrically around the reference point, then calculations are simplified and noise is reduced, but the device complexity increases due to precise sensor arrangement requirements
Solution Approach 1:
The pressure sensors are arranged in a matrix pattern that appears asymmetric in its detailed configuration, though the overall structure maintains symmetry around the reference point. This asymmetric-matrix arrangement within a symmetric framework allows for simplified calculation of pressure direction and intensity while the symmetric distribution around the reference point helps reduce noise and improve detection accuracy. The matrix structure provides a balance between manufacturing feasibility and detection performance.
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
Enables high-precision detection of external pressure direction and intensity by accurately measuring pressure differences across the sensor array, improving detection accuracy compared to prior technologies.
Implementation Method 1
a second substrate on which disposed an elastic projection whose center of gravity (hereinafter referred to as 'center') is positioned in a position overlapping with the reference point and that elastically deforms due to the external pressure
Data Source
AI summary
A detection device includes a first substrate that has a plurality of pressure sensors disposed around a reference point, and a second substrate on which disposed an elastic projection whose center is positioned in a position overlapping with the reference point and that elastically deforms due to the external force in a state in which the tip portion of the elastic projection makes contact with the first substrate. When an external force has been applied, the direction and intensity of the applied external force is found by carrying out a predetermined calculation using pressure values detected by the pressure sensors.