Detection Device Vertical Light Path for Size Accuracy Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing detection devices face challenges in reducing size while maintaining accuracy, as the biological information detection part and the acceleration detection part often absorb light emitted by the biological information detection part, leading to thermal expansion and reduced accuracy in the acceleration detection part, and stray light affecting the biological information detection.
Innovation Solution
The detection device is configured with a base part, an acceleration detection part, a lid part, a control part, a light emission part, a light reception part, and a housing part, where the height of the top surface of the light emission part is equal to or greater than the height of the bottom surface of the lid part, and the light emission and reception parts are positioned to minimize light absorption by the acceleration detection part and reduce stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the biological information detection part and the acceleration detection part are disposed in the same space to reduce device size, then the device size is reduced, but light emitted from the biological information detection part is absorbed by the acceleration detection part causing thermal expansion and reduced acceleration detection accuracy
Solution Approach 1:
The patent positions the light emission part and light reception part at different heights in the vertical direction (first direction), with the light emission part extending upward beyond the lid part. This vertical dimension arrangement allows light to be emitted upward toward the subject person rather than horizontally toward the acceleration detection part, solving the light absorption problem while maintaining compact horizontal footprint
Solution Approach 2:
The patent makes the lid part transparent or translucent specifically in the region above the acceleration detection part. This localized optical property allows light that passes through the subject person to be detected by the light reception part while preventing light from being absorbed by the acceleration detection part, as the transparent lid directs light transmission vertically
2Volume of moving object
If the biological information detection part and the acceleration detection part are disposed in the same space, then device size is reduced, but stray light affects the biological information detection
Solution Approach 1:
The lid part is made transparent or translucent in the specific region above the acceleration detection part, creating a localized optical pathway that guides light vertically through the subject person to the light reception part. This selective transparency prevents stray light from reaching the detection path while maintaining the compact integrated structure
Solution Approach 2:
By arranging the light emission part to extend beyond the lid part in the vertical direction and positioning the light reception part to receive light from above, the patent creates a vertical light detection pathway that is spatially separated from horizontal stray light sources, improving biological information detection reliability
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 allows for a reduction in size by housing both detection parts in the same space, while minimizing light absorption and stray light, thus maintaining accurate detection of biological information and acceleration without thermal issues.
Implementation Method 1
a light emission part that emits light, a light reception part that receives light, a biological information detection part that detects the biological information of the subject person based on the light reception amount at the light reception part of the light that is emitted from the light emission part and reflected inside the target portion
Implementation Method 2
an acceleration detection part that detects the acceleration of the target portion
Implementation Method 3
a lid part configured to cover the acceleration detection part together with the base part on the base part
Data Source
AI summary
A detection device configured to be attached to a predetermined portion in a subject, including a base part including a surface orthogonal to a first direction, an acceleration detection part provided at the base part, a lid part configured to cover the acceleration detection and base parts, a control part provided at the lid part configured to detect a body movement of the subject based on an output of the acceleration detection part when the detection device is attached to the portion, a light emission part configured to emit light, a light reception part configured to receive light, and a housing part configured to house the base, acceleration detection, lid, control, light emission, and light reception parts. A height of a top surface of the light emission part in the first direction is equal to or greater than that of the bottom surface of the lid part.