Bionic Force Sensor Using Magnetic Deformation
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Solution Overview
Problem
Existing force sensors used in robots for perceiving multi-dimensional forces are often bulky, complex, and have insufficient sensing accuracy, making them inconvenient for installation and use.
Innovation Solution
A force information acquisition device based on a bionic structure, which includes a force information acquisition layer with an elastic structure and embedded permanent magnets, and a magnetic field signal acquisition chip, capable of generating deformations corresponding to force information and converting magnetic field signals into electrical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional force sensor is used to perceive multi-dimensional force, then the sensing coverage is comprehensive, but the structure becomes bulky and complicated
Solution Approach 1:
The patent replaces traditional mechanical force sensors with a magnetic field-based sensing system. An elastic layer deforms under force to change the position of embedded magnets, and Hall effect sensors detect these positional changes to determine force information. This substitution of mechanical sensing with magnetic field sensing simplifies the overall structure while maintaining multi-dimensional force perception capability.
Solution Approach 2:
The force sensing function is divided into independent sensing units distributed across the elastic layer. Multiple magnets and corresponding Hall effect sensors are arranged in a segmented manner, allowing each unit to independently detect local force characteristics. This segmentation enables comprehensive multi-dimensional force perception without requiring a single complex sensor assembly.
2Ease of operation
If a traditional force sensor is mounted on the robot, then the force perception function is achieved, but the installation becomes inconvenient
Solution Approach 1:
The patent merges the force sensing function directly into the robot's existing structure, specifically integrating the elastic layer with magnets and Hall effect sensors into the end effector or robotic finger. This integration eliminates the need for separate mounted sensors and reduces installation complexity while maintaining force perception functionality.
Solution Approach 2:
The elastic layer structure serves dual purposes: it acts as both the structural component of the robotic element and the force sensing element. The deformation of this selfsame structure under force directly modulates the magnetic field position, which is then detected by embedded Hall effect sensors, eliminating the need for separate sensing components that would complicate installation.
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 device enables accurate and efficient acquisition and perception of multi-dimensional force information, improving the robot's ability to interact safely with its environment and perform complex tasks.
Implementation Method 1
a permanent magnet is embedded in the force information acquisition layer; wherein the force information acquisition layer has an elastic structure configured to generate a deformation corresponding to a first force information of a force after being subjected to the force, so that the permanent magnet moves with the deformation to generate a magnetic field signal corresponding to the force information
Implementation Method 2
the force information acquisition layer has an elastic structure configured to generate a deformation corresponding to a first force information of a force after being subjected to the force, so that the permanent magnet moves with the deformation
Implementation Method 3
the magnetic field signal acquisition chip is arranged in parallel with the force information acquisition layer, and is configured to acquire the magnetic field signal and convert the magnetic field signal into an electrical signal
Data Source
AI summary
Provided are a device, a system and a method for acquiring a force information based on a bionic structure, including: a force information acquisition layer and a magnetic field signal acquisition chip; wherein a permanent magnet is embedded in the force information acquisition layer; wherein the force information acquisition layer has an elastic structure configured to generate a deformation corresponding to a first force information of a force after being subjected to the force, so that the permanent magnet moves with the deformation to generate a magnetic field signal corresponding to the force information; wherein the magnetic field signal acquisition chip is arranged in parallel with the force information acquisition layer, and is configured to acquire the magnetic field signal and convert the magnetic field signal into an electrical signal.