Light scattering part stabilizes blood flow velocity detection
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Solution Overview
Problem
Existing light-emitting sensor devices for measuring blood flow velocity are prone to inaccuracies due to subtle movements and changes in pressure, leading to unreliable detection values.
Innovation Solution
Incorporating a light scattering part made of fibrous materials, such as woven or nonwoven fabrics, or foam between the irradiating and receiving parts to stabilize the detection by scattering light and reducing the impact of position shifts and pressure changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light-emitting sensor device is used to measure blood flow velocity, then the detection value can be obtained, but the accuracy varies due to subtle movement and pressure changes of the living body
Solution Approach 1:
A light scattering part is introduced as an intermediary component between the light emitting unit and the living body. This scattering part diffuses the incident light before it reaches the tissue, creating a more uniform light distribution that reduces sensitivity to position shifts and pressure changes, thereby stabilizing the detection values
Solution Approach 2:
The patent changes the optical parameters of the light delivery system by introducing a scattering medium that modifies the light's propagation characteristics. The scattering part alters the spatial distribution and intensity profile of the incident light, making the measurement less sensitive to external factors like movement and pressure
2Measurement precision
If the relative position between the sensor device and specimen shifts, then the detection value changes, but the device structure remains simple
Solution Approach 1:
The light scattering part serves as a mediator that decouples the detection system from position shifts. By scattering the light before it enters the tissue, the system becomes less sensitive to the exact relative positioning, thereby stabilizing detection values without requiring complex position compensation mechanisms
Solution Approach 2:
The optical path is segmented into distinct functional regions: the light emitting unit, the light scattering part, and the specimen. This segmentation allows the scattering part to independently control light distribution, providing stability against position changes while maintaining a relatively simple overall device structure
3Measurement precision
If pressure on the living body changes during detection, then the detection value varies, but adding pressure compensation increases device complexity
Solution Approach 1:
The light scattering part acts as a pressure-insulating intermediary. The scattering medium diffuses light in a way that compensates for pressure-induced changes in tissue optics, maintaining stable detection values without requiring active pressure compensation electronics or mechanisms
Solution Approach 2:
The light scattering part provides passive pressure compensation through its inherent optical scattering properties. The scattering medium automatically compensates for pressure changes in the tissue without requiring external control systems, making the device self-regulating against pressure variations
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 light scattering part effectively reduces variations in detection values caused by position shifts and pressure changes, enabling stable and accurate measurement of blood flow velocity.
Implementation Method 1
a light scattering part which scatters at least one of light emitted from the irradiating part and light from the specimen
Implementation Method 2
light caused by the light applied to the specimen, such as lights reflected, scattered, diffracted, refracted, transmitted through, Doppler-shifted in the specimen
Data Source
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AI summary
A light-emitting sensor device is provided with: a substrate (110); an irradiating part (120), disposed on the substrate, for applying light to a specimen; a light receiving part (150), disposed on the substrate, for detecting light from the specimen caused by the applied light; a light scattering part, disposed at least one of between the irradiating part and the specimen and between the specimen and the light receiving part, for scattering at least one of light emitted from the irradiating part and the light from the specimen. By this, it is possible to stably detect a predetermined type of information, such as a blood flow velocity, on the specimen.