Displacement Detection Device Using Gap Amplification
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Solution Overview
Problem
Existing displacement detection devices for collaborative robots lack high sensitivity, which is essential for accurate control of these robots.
Innovation Solution
A displacement detection device comprising two plate members with end portions attached to both the first and second members, featuring an intermediate portion with a sensor that detects changes in a gap between the plate members, amplifying the displacement detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional displacement detection device is used, then the device structure is simple, but the sensitivity is insufficient for accurate control
Solution Approach 1:
The detection device is divided into two separate plate members (first and second plate members) with distinct functions. The first plate member is attached to the stationary first member, while the second plate member is attached to the moving second member. This segmentation allows each plate to be optimized for its specific role in the detection mechanism, improving overall sensitivity while maintaining manageable complexity
Solution Approach 2:
A gap is intentionally formed between the intermediate portions of the two plate members, serving as an intermediary space that amplifies the displacement detection. The sensor detects changes in this gap, which magnifies the relative movement between the first and second members. This intermediary gap acts as a mechanical amplifier, enhancing sensitivity without requiring complex sensor systems
2Measurement precision
If the gap between plate members is increased to amplify displacement, then sensitivity increases, but the device size increases
Solution Approach 1:
The plate members are configured to extend in a predetermined direction (first direction), while the gap between their intermediate portions is formed in a different direction (second direction perpendicular to the first). This dimensional arrangement allows the plates to be long in the direction of motion for high sensitivity, while keeping the gap small in the perpendicular direction, thus maintaining compact device dimensions without sacrificing detection sensitivity
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 significantly increases sensitivity by amplifying the displacement detection, ensuring accurate control of collaborative robots and similar systems.
Implementation Method 1
when the second member is displaced in the predetermined direction, an amount of the change in the gap is larger than an amount of displacement of the second member
Data Source
AI summary
A displacement detection device includes a first plate member and a second plate member that extend in a predetermined direction; and a sensor that detects displacement. Opposite ends of the first plate member are respectively connected to opposite ends of the second plate member. Each of the first and second plate members has a first end portion and a second end portion, and also has a middle portion located between these two end portions. A gap is formed between the middle portion of the first plate member and the middle portion of the second plate member. The sensor detects variation in the gap. When a second member is displaced in the predetermined direction, the amount of variation in the gap is greater than the amount of displacement of the second member.