Light Guide Member for 3D Displacement Measurement
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Solution Overview
Problem
Existing displacement information output devices struggle to accurately measure three-dimensional displacements of objects due to limitations in sensitivity and accuracy, particularly in detecting out-of-plane displacements.
Innovation Solution
A displacement information output device is designed with a light source, a light guide member, and a light receiver. The light guide member includes a light incident portion and a light emitting portion, and it guides light subjected to reflection or scattering from the object, enhancing the sensitivity of displacement measurement by increasing the amount of change in the speckle pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional displacement information output device directly receives reflected or scattered light from the object, then the device structure is simple, but the sensitivity and accuracy in measuring three-dimensional displacements (particularly out-of-plane displacements) is insufficient
Solution Approach 1:
The patent introduces a light guide member as an intermediary component between the object and the light receiver. This light guide member guides the reflected or scattered light and enhances the sensitivity of displacement measurement by increasing the amount of change in the speckle pattern, thereby improving three-dimensional displacement measurement accuracy without excessively complicating the device structure
Solution Approach 2:
The patent utilizes the light guide member to transform the light path in a different spatial dimension, allowing the light to travel through the light guide member and emerge at a different position and angle. This dimensional transformation enhances the speckle pattern change for out-of-plane displacements, improving measurement sensitivity
2Measurement precision
If the light guide member guides light through a longer path to increase speckle pattern change, then measurement sensitivity improves, but light loss increases
Solution Approach 1:
The patent optimizes parameters of the light guide member including its material properties, cross-sectional shape, and surface characteristics to minimize light loss while maintaining the light path length necessary for enhanced speckle pattern change. By carefully controlling these parameters, the system achieves high measurement sensitivity without excessive light intensity loss
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 achieves high accuracy in outputting information related to three-dimensional displacements, including both in-plane and out-of-plane movements, by utilizing the light guide member to amplify the changes in the speckle pattern, thereby improving sensitivity and measurement precision.
Implementation Method 1
a light guide member (20) including a light incident portion (21) from which the light subjected to at least one of reflection or scattering from the object is incident; and a light emitting portion (22) from which the light guided through the light guide member (20) is emitted
Data Source
AI summary
A displacement information output device includes a light source to emit light to an object; a light guide member, and a light receiver. The light guide member includes a light incident portion from which the light subjected to at least one of reflection or scattering from the object is incident; and a light emitting portion from which the light guided through the light guide member is emitted. The light receiver receives the light emitted from the light emitting portion; and outputs information related to a three-dimensional displacement of the object obtained based on the emitted light.