Force Sensor Integrating Scales on Elastic Connection Members
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Solution Overview
Problem
Existing force sensors require a displacement direction conversion mechanism, increasing the number of components and complicating the assembly process, making size and cost reduction difficult.
Innovation Solution
A force sensor design that integrates scales and displacement detection elements on the elastic connection members, eliminating the need for a separate displacement conversion mechanism, allowing for size and cost reduction by detecting external forces and moments through the inclination of these elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a displacement direction conversion mechanism is provided to transform displacement direction, then force detection capability is improved, but the number of components increases and device complexity increases
Solution Approach 1:
The patent combines the force receiving member and the displacement direction conversion mechanism into a single integrated structure. The force receiving member itself is designed to convert displacement in the force application direction into displacement in a different direction, eliminating the need for a separate conversion mechanism. This merging reduces the number of components while maintaining the force detection capability.
Solution Approach 2:
The force receiving member is designed to perform multiple functions simultaneously: it receives external force, converts displacement direction, and serves as the detection target. This multi-functionality eliminates the need for separate dedicated components for each function, thereby reducing device complexity while preserving measurement precision.
2Measurement precision
If a displacement direction conversion mechanism and detection target object are added, then force detection capability is improved, but the size of the sensor increases
Solution Approach 1:
By merging the force receiving member and displacement direction conversion mechanism into one integrated component, the patent eliminates the need for separate conversion mechanisms and detection target objects. This integration significantly reduces the overall volume of the sensor while maintaining the capability to detect force through displacement conversion.
3Measurement precision
If more components are provided for displacement conversion, then force detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The integration of multiple functions into the force receiving member reduces the total number of components that need to be manufactured and assembled. This simplification of the component list directly reduces manufacturing costs while preserving the force detection capability through the inherent displacement conversion design of the force receiving member.
Solution Approach 2:
By designing the force receiving member to perform multiple functions (force reception, displacement conversion, and serving as detection target), the patent reduces the total component count required. Fewer components mean lower manufacturing costs, while the multi-functional design ensures that force detection capability is maintained.
4Measurement precision
If a displacement direction conversion mechanism is provided, then force detection capability is improved, but the assembling process becomes more complicated
Solution Approach 1:
By combining the force receiving member and displacement direction conversion mechanism into a single pre-integrated component, the patent eliminates the need for separate assembly steps to connect these parts. The integrated structure comes pre-assembled, significantly simplifying the overall assembly process while maintaining the force detection capability through the built-in conversion mechanism.
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 integration of scales and displacement detection elements on the elastic connection members simplifies assembly and reduces the size and cost of the force sensor while maintaining effective detection of external forces and moments.
Implementation Method 1
the elastic connection member is elastically deformed, and a displacement corresponding to the direction and magnitude of the external force with respect to the support member is generated in the force receiving member
Implementation Method 2
a displacement detection element provided on the support member so as to face the detection target object detects the movement of the detection target object
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
The invention relates to a force sensor 100 that detects a force acting from the outside, and provides the force sensor 100 whose reduction in size and cost can be achieved. The force sensor 100 includes a support member 20, a force receiving member 4 that is displaced with respect to the support member 20 by the action of an external force, an elastic connection member 5 connecting the support member 20 and the force receiving member 4, scales 8a to 8d, which are detection target object bodies, disposed at the elastic connection member 5, displacement detection elements 9a to 9d that are mounted on the sensor substrate 7 composing the support member 20 so as to face the scales 8a to 8d in a one-to-one manner, and that detect movements of the scales 8a to 8d.