Elongate Piezoelectric Substrate Circular Arrangement

Solution Overview

Problem

Piezoelectric cable arrangements in pressure detection devices, especially those in wavy shapes, result in complex structures and increased manufacturing costs while aiming to enhance detection range and sensitivity.

Innovation Solution

A sensor module comprising a holding member with an elastic body, a pressure-bearing face, an adjoining deformable face, and an elongate piezoelectric substrate that surrounds the pressure-bearing direction, utilizing an optically active helical chiral polymer like polylactic acid for improved sensitivity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the piezoelectric cable is arranged in a wavy shape with respect to the pressure-applied face to broaden the detection range and secure detection sensitivity, then the detection range and sensitivity are improved, but the structure becomes complicated and manufacturing costs increase

Engineering Contradiction:

Improvedetection sensitivityVSAvoidstructure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The piezoelectric substrate is arranged in a circular pattern around the pressure-applied face, utilizing curvature to enhance detection sensitivity while maintaining a simple, regular structure that avoids the complexity of wavy arrangements

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The circular piezoelectric substrate configuration serves multiple functions: it provides broad detection range, maintains high sensitivity, and simplifies the overall structure, replacing the need for complex wavy cable arrangements

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Area of stationary object

If the piezoelectric cable is arranged in a wavy shape with respect to the pressure-applied face to broaden the detection range and secure detection sensitivity, then the detection range is improved, but the structure becomes complicated and manufacturing costs increase

Engineering Contradiction:

Improvedetection rangeVSAvoidstructure complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The piezoelectric substrate is arranged in a circular pattern around the pressure-applied face, utilizing curvature to enhance detection sensitivity while maintaining a simple, regular structure that avoids the complexity of wavy arrangements

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The circular piezoelectric substrate configuration serves multiple functions: it provides broad detection range, maintains high sensitivity, and simplifies the overall structure, replacing the need for complex wavy cable arrangements

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If the piezoelectric substrate is arranged in a simple linear configuration, then the structure is simplified and manufacturing costs are reduced, but the detection range and sensitivity are insufficient

Engineering Contradiction:

Improvestructure simplicityVSAvoiddetection sensitivity

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The piezoelectric substrate is arranged in a circular pattern around the pressure-applied face, utilizing curvature to enhance detection sensitivity while maintaining a simple, regular structure that avoids the complexity of wavy arrangements

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The piezoelectric substrate transitions from a linear one-dimensional arrangement to a circular two-dimensional configuration, expanding the detection range and sensitivity while maintaining structural simplicity and ease of manufacture

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 solution enables secure detection range and heightened sensitivity with a simple structure, reducing mechanical burden on the piezoelectric substrate and maintaining stability through deformation of the elastic body, thus addressing the complexity and cost issues of wavy arrangements.

Implementation Method 1

an elongate piezoelectric substrate arranged on the adjoining face

Methodology Applied

Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

an adjoining face provided at the holding member so as to adjoin the pressure bearing face and configured to undergo deformation in accordance with the pressure borne by the pressure bearing face

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11371896B2Sensor module containing elongate piezoelectric substrate and pressure distribution sensor provided with the same

Publication Date: 2022.06.28 MITSUI CHEMICALS INC

AI summary

A sensor module includes a holding member formed of an elastic body, a pressure bearing face provided at the holding member and configured to bear pressure, an adjoining face provided at the holding member so as to adjoin the pressure bearing face and configured to undergo deformation in accordance with the pressure borne by the pressure bearing face, and an elongate piezoelectric substrate arranged on the adjoining face.