Sheet-like Probe Holder with Rotatable Probes for Head-Mounted Measurement
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Solution Overview
Problem
Existing probe devices for biological light measuring apparatuses face challenges in achieving accurate measurements due to poor fit on individual heads, restricting subject mobility and causing discomfort, primarily because of the rigid structure and multiple optical fibers that require precise adjustment.
Innovation Solution
A probe device with a sheet-like probe holder and a sheet holding unit that creates a light-shielded space with a gap between the probe holder and the biological surface, featuring rotatable probe bodies with sub-protrusions to facilitate easy mounting and adjustment, reducing the need for fine adjustments and improving breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a rigid structure with multiple optical fibers is used, then measurement precision can be maintained, but ease of operation deteriorates due to restricted mobility and discomfort
Solution Approach 1:
The probe device is divided into multiple detachable probe bodies that can be independently adjusted or removed, allowing the subject to move more freely while maintaining measurement capability at key positions
Solution Approach 2:
The probe bodies are made rotatable around the main protrusion, enabling dynamic adjustment of probe orientation to accommodate subject movement and different head shapes while maintaining optical fiber contact with the scalp
2Measurement precision
If probe bodies are firmly mounted to ensure measurement accuracy, then measurement precision improves, but ease of operation worsens due to difficulty in adjustment and mounting
Solution Approach 1:
The probe bodies are rotatably mounted on the probe holder, allowing easy adjustment of their orientation by simply rotating them around the main protrusion axis, making mounting and repositioning straightforward while maintaining stable contact
Solution Approach 2:
The probe bodies can be independently adjusted and positioned by the operator without requiring complex alignment procedures, as each probe body can rotate freely to achieve proper contact orientation
3Measurement precision
If the probe holder is placed in direct contact with the biological surface, then measurement precision improves, but object-generated harmful factors worsen due to restricted breathability and discomfort
Solution Approach 1:
The probe holder is designed with a sheet-like structure that can be separated into multiple sections, allowing air circulation channels to be formed between the holder and the scalp, maintaining breathability while preserving measurement capability through the optical fibers
Solution Approach 2:
The optical fibers act as intermediaries that transmit light signals through the gap between the probe holder and the scalp, eliminating the need for direct contact and thus maintaining breathability while preserving measurement accuracy
Data Source
AI summary
A probe device includes a sheet-like probe holder, a plurality of light-emitting probes and a plurality of detection probes mounted on the probe holder at a predetermined interval, a sheet holding unit holding the probe holder at a predetermined position on the biological surface, and a fixing band mounting the sheet holding unit on the living body. Each of the plurality of light-emitting probes and the detection probes includes a probe body including a light emitting unit or a detection unit, and a probe mounting part detachably mounting the probe body to the probe holder at a predetermined position.