Segmented Deformable Layer for Accurate Pressure Sensor Arrays
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Solution Overview
Problem
Conventional pressure sensor arrays struggle to accurately measure detection target items on uneven or low-stiffness objects due to interference from the object's stiffness and shape, particularly when in contact with a ground surface.
Innovation Solution
A measuring apparatus with a sensor array unit and a deformable layer having independently compressible and deformable sections, which minimizes the influence of the object's stiffness and shape on measurement results by using materials with specific Poisson's ratios and configurations to prevent interference between sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If planar sensors are used to measure pressure distribution on target objects, then measurement can be performed on the ground surface, but measurement accuracy deteriorates due to differences in stiffness and shape of the target object affecting the results
Solution Approach 1:
The deformable layer is divided into multiple independently compressible sections that can deform separately in response to pressure applied at different locations. This segmentation allows each section to independently accommodate variations in target object shape and stiffness without affecting adjacent measurement areas, thereby eliminating the harmful influence of object variability on measurement accuracy.
Solution Approach 2:
The patent employs a deformable layer with specific material properties (Poisson's ratio between -0.5 and 0.5) that enables controlled deformation in response to applied pressure. By changing the physical state of the sensor interface from rigid to deformable, the system adapts to variations in target object characteristics while maintaining accurate pressure distribution measurements.
2Measurement precision
If the deformable layer has sections that are highly compressible, then measurement accuracy improves, but sections may interfere with each other reducing resolution
Solution Approach 1:
The deformable layer is designed with sections that have localized deformation characteristics, where each section is optimized to deform independently within its specific region. This local quality ensures that compression at one location does not propagate to adjacent sections, maintaining spatial resolution while achieving high compressibility for accurate pressure measurement.
Solution Approach 2:
By dividing the deformable layer into discrete sections with defined boundaries, the patent prevents lateral interference between adjacent measurement zones. Each segmented section maintains its independence even under compression, ensuring that high compressibility in one area does not compromise the spatial resolution or measurement integrity of neighboring areas.
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 apparatus achieves high-resolution, accurate measurement of pressure distribution on uneven or low-stiffness objects by reducing the impact of the object's shape and stiffness, allowing for wider and more reliable detection of pressure changes.
Implementation Method 1
a deformable layer that is a flexible layer disposed so as to be located between the sensor array unit and a target object, wherein the deformable layer has multiple sections that are divided from each other so as to be independently compressible and deformable mainly in a normal direction of the placement face
Implementation Method 2
the multiple sensors included in the sensor array unit are each a resistance change pressure sensor, a capacitance change pressure sensor, a photo reflector, or a SAW device
Implementation Method 3
the multiple sensors included in the sensor array unit are each a resistance change pressure sensor, a capacitance change pressure sensor, a photo reflector, or a SAW device
Implementation Method 4
the multiple sensors included in the sensor array unit are each a resistance change pressure sensor, a capacitance change pressure sensor, a photo reflector, or a SAW device
Data Source
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AI summary
In order to solve the conventional problem that it is sometimes difficult to properly perform required measurement of detection target items of target objects that are uneven or target objects with low stiffness, a measuring apparatus 1 includes a sensor array unit 5 having multiple sensors 51 that are aligned on a placement face and that are each capable of detecting a detection target item of a target object that is positioned so as to oppose the placement face, and a deformable layer 10 that is a flexible layer disposed between the sensor array unit 5 and a target object. The deformable layer 10 has multiple sections that are divided from each other so as to be independently compressible and deformable mainly in a normal direction of the placement face. With the measuring apparatus 1, it is possible to obtain measurement results of a detection target item of a target object such that the influence of the stiffness and the shape of the target object is relatively small.