Torque Sensor Assembly for Precise Strain Gauge Positioning
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Solution Overview
Problem
Existing torque sensors face challenges in accurately disposing strain gauges at predetermined positions on the side surfaces of the beam, which affects the precision of torque measurement.
Innovation Solution
The torque sensor design includes a first frame part, a second frame part, a first core part, a second core part, and a torque detector with film-shaped strain gauges on its side surfaces. The torque detector is sandwiched between the frame and core parts, allowing for precise positioning of the strain gauges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If strain gauges are disposed on the side surface of the beam to measure torque, then torque measurement capability is achieved, but positioning accuracy of the strain gauges deteriorates
Solution Approach 1:
The torque sensor is divided into multiple components: first and second frame parts, first and second core parts, and a torque detector. This segmentation allows the strain gauges to be positioned on the torque detector rather than directly on the beam, enabling more accurate positioning through the structured assembly of separate parts.
Solution Approach 2:
The torque detector acts as an intermediary component between the beam and the strain gauges. By placing strain gauges on the torque detector which is positioned between the frame parts and core parts, the system achieves more accurate strain measurement while simplifying the positioning process.
2Measurement precision
If strain gauges are positioned on the side surface of the beam, then torque detection is enabled, but the complexity of the structure increases
Solution Approach 1:
The patent combines multiple structural elements (frame parts, core parts, and torque detector) into an integrated assembly where the strain gauges are mounted on the torque detector. This merging approach consolidates the measurement function into a specific component, reducing overall structural complexity while maintaining detection accuracy.
Solution Approach 2:
The torque detector serves multiple functions: it provides a mounting surface for strain gauges, transmits mechanical stress from the beam, and enables torque measurement. This multi-functionality reduces the need for separate dedicated components, thereby simplifying the overall 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
This configuration enables high-accuracy torque measurement by ensuring accurate placement and orientation of the strain gauges, enhancing the sensor's ability to detect torque with precision.
Implementation Method 1
The torque sensor includes a strain gauge disposed in a strain portion where strain occurs in response to an applied torque. The strain caused by the applied torque appears notably in a side surface of a beam of the torque sensor.
Data Source
AI summary
A torque detector of a torque sensor has a columnar shape, one end sandwiched between bottom surfaces of a first frame part and a second frame part, the other end sandwiched between bottom surfaces of a first core part and a second core part, and film-shaped strain gauges respectively provided to two side surfaces thereof, the two side surfaces being orthogonal to the bottom surface of the first frame part.