Slip Sensor Segmented Resistive Portions Shear Force Detection
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Solution Overview
Problem
Conventional sensors are not effective in accurately detecting slip between objects and the sensor itself, lacking the necessary precision for reliable measurement.
Innovation Solution
A slip sensor design featuring a layered structure with resistive portions on insulating substrates and an elastically deformable member between them, where electrodes on both ends of the resistive portions detect changes in resistance values due to shear force, allowing for accurate slip detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional strain sensors or capacitive sensors are used, then basic sensing function is achieved, but slip detection accuracy is insufficient
Solution Approach 1:
The sensor is divided into multiple first resistive portions and second resistive portions arranged in specific directions. Each resistive portion detects strain in its specific direction, and by combining these segmented measurements, the sensor achieves accurate slip detection while filtering out unwanted stress components through differential calculation.
Solution Approach 2:
Different resistive portions are oriented in different directions (first direction and second direction) to have different sensitivities to different types of stress. This local quality differentiation allows the sensor to selectively measure slip-related strain while ignoring perpendicular stress components.
2Measurement precision
If simple sensor structure is used, then manufacturing is easier, but slip detection accuracy is reduced
Solution Approach 1:
The sensor uses multiple simple resistive portions arranged in different directions rather than a single complex sensing element. This segmentation approach maintains manufacturing simplicity while achieving accurate slip detection through the combined output of multiple simple components.
Solution Approach 2:
The same basic resistive portion structure serves multiple functions by being oriented in different directions. Each resistive portion has the same simple construction but contributes differently to slip detection based on its orientation, achieving multi-functionality without increasing structural complexity.
3Measurement precision
If resistive portions are arranged in multiple directions, then slip detection accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
Each resistive portion is designed with a specific local orientation (first direction or second direction) that is optimized for detecting particular stress components. This local quality assignment simplifies the manufacturing process by allowing each component to be fabricated independently with its specific orientation rather than requiring high-precision alignment of a single complex structure.
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 high-accuracy detection of slip and force magnitude between the sensor and contacted objects, enhancing sensitivity and precision in slip sensing applications.
Implementation Method 1
a difference between a resistance value set between a given pair of electrodes associated with a given first resistive portion and a resistance value set between a given pair of electrodes associated with a given second resistive portion facing the given first resistive portion continuously varies in accordance with elastic deformation of the member that is caused by a shear force
Implementation Method 2
the member being configured to elastically deform in accordance with the force
Data Source
AI summary
A slip sensor includes a first insulating layer, a second insulating layer, and a member configured to elastically deform in accordance with a force. A difference between a resistance value set between a given pair of electrodes associated with a given first resistive portion and a resistance value set between a given pair of electrodes associated with a given second resistive portion facing the given first resistive portion continuously varies in accordance with elastic deformation of the member that is caused by a shear force.