Robotic Strain Sensor With Adhesive-Free Wire Mounting
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Solution Overview
Problem
Strain sensors suffer from mechanical errors such as creep, hysteresis, and drift due to adhesive connections, affecting detection sensitivity and precision.
Innovation Solution
A strain sensor design featuring a base with a mounting recess, a bearing structure outside a pre-defined gap, and a wire set connected directly to the bearing structure, eliminating the need for adhesive connections and leveraging resistance strain effects for enhanced sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive layer is used to connect strain gauge to elastomer, then mechanical connection is achieved, but mechanical errors such as creep, hysteresis, and drift occur affecting detection sensitivity
Solution Approach 1:
The invention extracts and removes the adhesive layer from the connection between the strain gauge and the force application location. By directly attaching the strain gauge to the elastomer without adhesive, the source of mechanical errors (creep, hysteresis, drift) is eliminated, thereby improving detection sensitivity while maintaining connection reliability through direct mechanical bonding.
2Stability of the object's composition
If strain gauge is wrapped on substrate with adhesive, then structural integrity is maintained, but mechanical errors occur affecting sensor performance
Solution Approach 1:
The adhesive layer is extracted and removed from the strain gauge mounting process. The strain gauge is directly wrapped and fixed to the elastomer substrate, eliminating the adhesive interface that causes mechanical errors. This direct attachment method maintains structural integrity while improving detection sensitivity by preventing creep, hysteresis, and drift.
3Ease of manufacture
If adhesive connection is used in strain sensor, then assembly is simplified, but mechanical errors such as creep and hysteresis affect precision
Solution Approach 1:
The adhesive layer is removed from the assembly process. The strain gauge is directly attached to the elastomer at the force application location through direct mechanical bonding. This eliminates the adhesive application step while improving measurement precision by eliminating the sources of mechanical errors (creep, hysteresis, drift) associated with adhesive connections.
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 new design improves detection sensitivity, response speed, and precision by reducing mechanical errors, while allowing for multi-directional force and moment detection.
Implementation Method 1
the principle of action of the six-dimensional force sensor is the resistance strain effect
Data Source
AI summary
A strain sensor is disclosed. The strain sensor includes: a base provided with a mounting recess; a mounting structure disposed on the base and located in the mounting recess, a preset gap being formed between the mounting structure and an inner surface of the mounting recess; a bearing structure mounted in the mounting recess and located outside the preset gap; and a wire set of a plurality of electrically conductive wires, at a side of the wire set each of the wires being fixedly disposed on the bearing structure, and at another side of the wire set each of the wires being fixedly arranged on the mounting structure to detect strain based on change of resistance of the wire set by a load applied through the bearing structure on the wire set.