Position Detection Device Using Expandable Member Heat Flux
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Solution Overview
Problem
Existing position detection devices, such as distortion crack measurement devices, face challenges in reproducibility due to varying output characteristics when attached to a detection object multiple times, as the positional relationship between fixed bases affects the size of detected distortion cracks.
Innovation Solution
A position detection device incorporating a base portion, a deformable following portion, an expandable and contractible member, and a heat flux detection section, where the expandable and contractible member generates heat during contraction and absorbs heat during expansion, allowing for the detection of heat flux and thereby the magnitude and direction of the acting force on the detection object, ensuring consistent positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed bases are used to attach the detection device to the detection object, then the device structure is simple and easy to manufacture, but the output characteristics vary when attached multiple times due to varying positional relationships
Solution Approach 1:
The patent applies the dynamics principle by replacing fixed rigid bases with a flexible linkage mechanism comprising multiple links and joints. The detection device can dynamically adapt its configuration to match the positional relationship between attachment points on the detection object, ensuring consistent measurement geometry regardless of where the device is attached. The flexible links allow the device to accommodate varying distances and orientations while maintaining accurate relative positioning between sensors and measurement points.
Solution Approach 2:
The patent implements parameter changes by using adjustable-length links and variable configuration joints that can modify the geometric parameters of the detection device. This allows the device to change its effective baseline distance and angular relationships to compensate for variations in attachment position, thereby maintaining consistent output characteristics across multiple attachments to different locations on the detection object.
2Adaptability or versatility
If the positional relationship between bases varies, then different attachment locations are possible, but the detected distortion crack size varies accordingly
Solution Approach 1:
The flexible linkage mechanism enables the detection device to dynamically adjust its geometry based on the actual attachment positions. The joints and links can reconfigure themselves to maintain the correct measurement baseline and angular relationships, ensuring that distortion crack measurements remain consistent regardless of which locations on the detection object are used for attachment.
Solution Approach 2:
The patent incorporates feedback mechanisms through sensors that detect the actual positions of the flexible links and joints. This information is used to compensate for deviations from the ideal measurement configuration, allowing the system to maintain measurement precision even when attached at various locations on the detection object with different geometries.
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 enables simple and highly reproducible detection of changes in the relative position of a detection object by maintaining constant positions for the expandable and contractible member and heat flux detection section, ensuring accurate and consistent output across multiple attachments.
Implementation Method 1
The expandable and contractible member provided between the base portion and the following portion is made of a material expandable and contractible according to deformation or movement of the following portion, and generates heat during contraction and absorbs heat during expansion
Data Source
AI summary
A position detection device, for detecting a change in relative position of a detection object with respect to a reference portion, includes: a base portion immovable with respect to the reference portion; a following portion deformable or movable following relative movement of the detection object with respect to the reference portion; an expandable and contractible member; and a heat flux detection section. The expandable and contractible member is provided between the base portion and the following portion, is made of a material expandable and contractible according to deformation or movement of the following portion, and generates heat during contraction and absorbs heat during expansion. The heat flux detection section is provided to be subjected to heat of the expandable and contractible member, and is configured to detect a heat flux that is a flow of heat between an inside and an outside of the expandable and contractible member.