Impedancemetric Sensor with Electrostatic and Magnetic Shields
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure, force, and torque sensors lack immunity to external electric fields and high humidity, leading to poor accuracy, large size, high cost, and limited reliability in harsh environments, and are unable to simultaneously measure axial, tangential forces, and torques effectively.
Innovation Solution
The development of impedancemetric sensors with complex deformable elements, electrostatic and magnetic shields, and embedded circuitry, allowing for simultaneous measurement of axial and tangential forces, and torques, while maintaining small size and high accuracy, using reactive impedance measuring elements with frequency-dependent components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pressure and force sensors are used in harsh environments with external electric fields and high humidity, then measurement capability is provided, but measurement precision deteriorates due to lack of immunity to environmental conditions
Solution Approach 1:
The patent introduces electrostatic shields and magnetic shields as intermediary elements between the sensing elements and the external environment. These shields act as mediators that block external electric fields and magnetic fields from directly affecting the impedance measuring elements, thereby maintaining measurement precision in harsh electromagnetic environments while preserving the sensor's ability to detect pressure and force
Solution Approach 2:
The patent creates a protected internal environment for the impedance measuring elements by enclosing them within shielded structures. This inert environment approach isolates the sensitive measuring elements from harmful external conditions (electric fields, magnetic fields, humidity), allowing accurate measurements to be taken even when the sensor operates in harsh external environments
2Reliability
If conventional sensors are designed for environmental protection, then reliability improves, but device size increases due to additional protection structures
Solution Approach 1:
The patent merges multiple functions into integrated shield structures that simultaneously provide electrostatic shielding, magnetic shielding, and environmental protection. By combining these protection functions into unified structures rather than separate components, the sensor achieves high reliability in harsh environments without proportionally increasing package size
Solution Approach 2:
The shield structures in the patent serve multiple functions: they act as electrostatic shields, magnetic shields, and environmental barriers simultaneously. This multi-functionality allows a single structural element to provide comprehensive protection against multiple environmental hazards, reducing the need for separate protection components and thereby controlling overall sensor size
3Adaptability or versatility
If conventional sensors are used for force measurement, then basic measurement capability is provided, but measurement precision deteriorates because they cannot simultaneously measure axial and shear forces
Solution Approach 1:
The patent segments the sensing capability by using multiple independent impedance measuring elements arranged in specific configurations. Each measuring element responds to different force components (axial, shear), and by combining their responses, the system achieves precise simultaneous measurement of multiple force types. The segmentation of measurement functions across multiple elements enables comprehensive force analysis
Solution Approach 2:
The patent employs asymmetric arrangements of impedance measuring elements and elastic elements to create differential measurement capabilities. The asymmetric configuration allows the sensor to distinguish between different force directions and types by measuring differential impedance changes, enabling precise simultaneous measurement of axial and shear forces through asymmetric response patterns
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
These sensors provide increased immunity to environmental conditions, enabling precise measurement of forces, pressures, and torques with small package sizes, suitable for diverse applications including medical, aerospace, and industrial uses, while ensuring user comfort and reliability.
Implementation Method 1
measuring elements with configurations adapted to the structure and measuring function, deformable elements with complex structure
Implementation Method 2
electrostatic and magnetic shields
Implementation Method 3
electrostatic and magnetic shields
Implementation Method 4
elastic element which may consist of two or more homogeneous or inhomogeneous elastic elements that allow compression or elongation deformations on the sensor axis, tangential shear and torsional deformations
Data Source
AI summary
The invention relates to a pressure sensor, forces after one to three directions, normal to the sensor plane and tangential to the sensor plane, as well as torques, the sensor being based on the variation of reactive or mixed impedances when applying normal forces or pressure and/or tangential forces or torques on the sensor structure. The sensor has a structure that includes a closed and watertight space, so that the behavior of the sensor is little or not affected by varying environmental conditions.