Magnetic Elastomer Force Sensing Without Power or Data Cables
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Solution Overview
Problem
Force sensors in industrial applications require power sources and electrical data connections, leading to increased complexity and cost.
Innovation Solution
A force sensor utilizing magnetic elastomer that operates untethered, utilizing a magnetic elastomer structure with a rigid frame and magnetic particles, which deflects in response to an applied magnetic field to measure mechanical properties without the need for power or data connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional force sensors are used to measure mechanical properties, then measurement capability is achieved, but device complexity and cost increase due to power sources and electrical data connections
Solution Approach 1:
The patent replaces traditional electronic force sensing mechanisms with a magnetic field-based measurement system. A magnetic elastomer structure with magnetic particles deflects in response to applied magnetic fields, and this deflection is measured using magnetic sensors (such as Hall effect sensors or magnetometers). This substitution eliminates the need for power sources and electrical data connections within the sensor itself, reducing device complexity while maintaining measurement capability.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary to transmit measurement information. The magnetic elastomer structure acts as a passive mechanical element that converts applied forces into magnetic field variations, which are then detected by external magnetic sensors. This intermediary approach allows the sensor to operate without internal power sources, as the magnetic field serves as the communication channel between the mechanical deformation and the measurement system.
2Measurement precision
If traditional force sensors with power sources and data connections are used, then force measurement is achieved, but cost increases
Solution Approach 1:
By replacing active electronic components with passive magnetic elements, the patent reduces manufacturing costs. The magnetic elastomer structure requires no power sources, batteries, or complex circuitry, thereby eliminating associated costs. The measurement is achieved through passive magnetic field interactions that can be detected by external sensors, significantly reducing the bill of materials and assembly complexity.
Solution Approach 2:
The magnetic elastomer structure can be manufactured as a low-cost, disposable component using conventional elastomer processing techniques. The magnetic particles are embedded in the elastomer matrix during manufacturing, creating a simple structure that can be produced economically without requiring expensive electronics or complex assembly procedures.
3Device complexity
If untethered operation is implemented without power sources, then device complexity is reduced, but measurement capability must be maintained
Solution Approach 1:
The magnetic field serves as an intermediary that enables measurement capability without requiring internal power sources. The magnetic elastomer structure passively responds to applied forces by changing its magnetic field configuration, and this change is detected by external magnetic sensors. This approach maintains measurement capability while achieving untethered operation.
Solution Approach 2:
The patent utilizes changes in magnetic field parameters (such as field strength, direction, or distribution) as the elastomer structure deforms under applied forces. By measuring these magnetic parameter changes rather than using traditional electrical resistance or capacitance changes, the system achieves accurate force measurement without requiring internal power sources or complex electronics.
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 accurate measurement of mechanical properties such as tenacity, elongation, and hardness of elastomeric articles without the need for power or data connections, reducing complexity and cost.
Implementation Method 1
utilizing a magnetic elastomer structure with a rigid frame and magnetic particles, which deflects in response to an applied magnetic field
Implementation Method 2
magnetic elastomer structure with a rigid frame and magnetic particles
Data Source
AI summary
A system may include a magnetic sensing elastomer. A system may include a rigid frame connected to the magnetic sensing elastomer. A system may include the magnetic sensing elastomer having a first end, a magneto-rheological elastomer (MRE) link and a second end; and wherein the magnetic sensing elastomer is configured to deflect in a direction by an amount based on an applied magnetic field and properties of a sample.