Pressure-Sensing Wearable Band for Physiological Sensor Alignment
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Solution Overview
Problem
Conventional methods for maintaining physiological sensors against a subject often result in inaccurate readings due to improper pressure and alignment, leading to noise in sensor signals and failure to obtain accurate measurements.
Innovation Solution
A wearable band with an elastic coupling mechanism and pressure-sensitive sensors that can be fine-tuned to maintain constant pressure and alignment with a subject's physiological structure, using a processing device to optimize sensor positioning and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a physiological sensor is pressed against a subject to obtain measurements, then measurement data can be obtained, but the pressure may cause noise in sensor signals and inaccurate readings
Solution Approach 1:
The patent employs feedback mechanisms where the sensor system continuously monitors the quality of physiological measurements and adjusts the coupling pressure accordingly. When noise levels exceed thresholds or measurement quality degrades, the system reduces pressure; when measurements are accurate, pressure is maintained or increased to ensure continuous contact. This dynamic feedback loop optimizes the trade-off between maintaining sensor contact and minimizing noise-induced inaccuracies.
Solution Approach 2:
The patent implements dynamic adjustment of sensor positioning and coupling pressure rather than static fixation. The sensor system actively moves and repositions itself against the subject's skin, adjusting pressure in real-time based on physiological conditions, skin compliance, and measurement quality. This dynamic approach allows the system to adapt to changing conditions while maintaining optimal measurement accuracy and minimizing noise.
2Reliability
If the sensor is pressed harder against the subject to ensure contact, then signal quality improves, but comfort and wearability deteriorate
Solution Approach 1:
The patent changes the pressure parameter dynamically within an optimal range rather than maintaining constant high pressure. The system adjusts coupling force based on multiple factors including skin compliance, physiological state, and measurement requirements, keeping pressure within a threshold range that ensures reliable measurements while maintaining subject comfort and wearability throughout extended use periods.
Solution Approach 2:
The sensor system performs self-adjustment of its coupling pressure and positioning without requiring manual intervention from the subject. The automated system monitors measurement quality and comfort indicators, then autonomously adjusts pressure and position to maintain optimal performance while ensuring subject comfort, allowing the device to serve itself in optimizing its own operation.
3Measurement precision
If the sensor position is adjusted to improve measurement accuracy, then reading quality improves, but the complexity of positioning increases
Solution Approach 1:
The patent implements self-positioning capabilities where the sensor system autonomously adjusts its position against the subject's body without requiring manual alignment. The sensor actively seeks and maintains optimal positioning based on physiological landmarks and measurement quality feedback, automatically compensating for skin movement and anatomical variations while keeping the positioning mechanism relatively simple.
Solution Approach 2:
The sensor system employs phase transition-like behavior in its positioning, switching between different operational states (e.g., initial contact phase, optimization phase, maintenance phase) to achieve accurate positioning. This allows the system to transition from a simple attachment state to an optimized measurement state and back, managing positioning complexity through state-based control rather than continuous complex adjustment mechanisms.
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
Ensures accurate and consistent physiological measurements by minimizing noise and ensuring proper sensor alignment and pressure, thereby improving the reliability of health monitoring.
Implementation Method 1
pressure sensor configured to detect a pressure of the band on the subject
Implementation Method 2
elastic coupling mechanism between the physiological sensor and the band
Data Source
AI summary
Systems, devices, and methods for determining an optimal position for a physiological sensor against a subject are described herein. A system may include a physiological sensor and a processing device. The processing device may store and execute instructions to receive a first signal generated by the physiological sensor as the physiological sensor is at a first position relative to the body part, receive a second signal generated by the physiological sensor as the physiological sensor is at a second position relative to the body part, determine a difference between the first signal and the second signal, determine, based on the difference, whether the first position or the second position is more closely aligned to a vein or an artery of the subject; and generate an indicator that indicates whether the first position or the second position is more closely aligned to the vein or the artery.