Elastic Projection Pressure Sensor for Directional Force Detection
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Solution Overview
Problem
Existing detection devices struggle to quickly and accurately detect the presence, distribution, direction, and intensity of external pressure, as they require extensive computations and are inefficient in measuring sliding forces.
Innovation Solution
A detection device comprising a first substrate with multiple pressure sensors, a detection unit, and a controller that uses an elastic projection to separate pressure components, allowing for rapid detection of pressure presence and precise determination of pressure direction and intensity through differential pressure values from symmetrically disposed sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure distributions are detected from the amounts by which cone-shaped protrusions deform using a camera, then pressure distribution can be detected, but the amount of computation increases and time required for pressure detection increases
Solution Approach 1:
The patent replaces the optical measurement system (camera imaging) with an electrical sensing system (pressure-sensitive elements). The pressure-sensitive elements directly convert mechanical pressure into electrical signals, eliminating the need for image capture and complex computational analysis of protrusion deformation, thus reducing detection time while maintaining pressure distribution measurement capability
Solution Approach 2:
The patent extracts the pressure detection function from the mechanical deformation measurement process. By using pressure-sensitive elements that directly respond to pressure, the system separates the pressure sensing function from the structural deformation analysis, enabling faster detection without compromising pressure distribution accuracy
2Adaptability or versatility
If pressure exerted on the measurement surface acts in directions within the surface (sliding force), then sliding force can be measured with the protrusion deformation method, but the measurement accuracy for sliding force direction is insufficient
Solution Approach 1:
The patent segments the pressure detection into multiple independent pressure-sensitive elements arranged in specific patterns. This segmentation allows the system to resolve force components in different directions by analyzing the differential response of individual elements, enabling precise measurement of sliding forces in multiple directions simultaneously
Solution Approach 2:
The patent employs asymmetric arrangement of pressure-sensitive elements or asymmetric structure of pressure-sensitive elements to enable detection of directional forces. This asymmetry allows the system to distinguish between forces acting in different directions within the surface, improving sliding force direction detection accuracy
3Measurement precision
If there are many detection points for a single contactor to detect pressure distribution, then pressure distribution detection accuracy improves, but the time required to obtain output value increases
Solution Approach 1:
The patent implements continuous pressure detection through the pressure-sensitive elements that continuously output electrical signals corresponding to pressure changes. This continuous action eliminates the need for sequential processing of multiple detection points, allowing the system to maintain both high detection accuracy and fast response by simultaneously capturing pressure information from all sensing elements
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 fast and accurate detection of external pressure presence and direction, improving efficiency and precision in pressure measurement compared to prior technologies.
Implementation Method 1
a second substrate on which is formed an elastic projection disposed so as to oppose the plurality of pressure sensors on the first substrate and whose tip makes contact with a position on the first substrate that overlaps with the reference point
Data Source
AI summary
A detection device includes: a detecting unit having a first substrate on which a plurality of pressure sensors are disposed around a reference point and a second substrate on which is formed an elastic projection whose center of gravity is positioned in a position overlapping with the reference point and that elastically deforms due to an external force in a state in which the tip of the elastic projection makes contact with the first substrate; and a controller that carries out detection operations for detecting the presence/absence of the external force based on pressure values detected by at least one of the plurality of pressure sensors, and controls the next detection operations of the detection unit based on the result of the previous detection.