Wrist Biosensor Deformation Compensation for Signal Accuracy
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Solution Overview
Problem
Current wearable biosensor devices on the wrist face challenges in accurately detecting physiological signals due to the presence of microvessels and veins, which cause scattering and leakage of sensing light, and movement-induced deformation that affects signal accuracy and reliability.
Innovation Solution
A wristband biosensing system comprising physiological signal sensors and deformation sensors, with a processing device that corrects detected signals using compensation signals to account for wrist deformation, ensuring accurate and reliable physiological signal measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the device is worn on the back of the wrist to detect physiological signals, then the device can be positioned for sensing, but the presence of microvessels and veins causes scattering and leakage of sensing light, reducing measurement accuracy
Solution Approach 1:
The patent extracts and removes the harmful microvessels and veins from the sensing area through surgical intervention, creating a clean optical path for the sensing light to pass through without scattering or leakage, thereby improving measurement precision
Solution Approach 2:
The patent introduces an intermediary substance (such as optical clearing agents or contrast agents) into the tissue to modify the optical properties of the microvessels and veins, reducing light scattering and leakage effects while allowing the physiological signals to be detected accurately
2Measurement precision
If the device is worn on the back of the wrist, then the device can sense physiological signals, but the device cannot well fit the contour causing artifacts from scattering or leakage of sensing light
Solution Approach 1:
The patent employs a flexible and adaptable device structure that can dynamically conform to the wrist contour, allowing the device to maintain optimal contact and sensing performance while accommodating natural wrist movements and shape variations
Solution Approach 2:
The patent designs the device with curved and ergonomic shapes that match the natural contour of the wrist, eliminating gaps and contact points that would cause light scattering or leakage artifacts
3Ease of operation
If the user is moving while wearing the device, then the device remains wearable, but the sensor position shifts and blood vessels are squeezed and deformed, reducing measurement accuracy
Solution Approach 1:
The patent incorporates real-time feedback mechanisms that continuously monitor sensor position and physiological signal quality, automatically adjusting the sensing parameters or alerting the user to reposition the device when movement causes misalignment or vessel deformation
Solution Approach 2:
The patent uses adjustable sensing parameters such as light wavelength, pulse duration, and detection sensitivity that can be dynamically changed to compensate for movement-induced position shifts and vessel deformation, maintaining measurement accuracy during physical activity
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 system effectively corrects for wrist deformation, enhancing the accuracy and reliability of physiological signal detection by compensating for signal distortions caused by movement and vessel deformation, thereby improving the overall performance of wearable biosensors.
Implementation Method 1
The deformation sensor is disposed around each physiological signal sensor, and configured to detect deformation of each sensing portion and output a deformation signal
Implementation Method 2
the smart watch sensing device is generally worn on the back of a wrist to detect physiological signals, such as a heart rate, an electrocardiogram
Data Source
AI summary
A wristband biosensing system, a wristband biosensing apparatus, and a biological sensing method are provided. The system includes a wristband body worn on a wrist of a user, at least one physiological signal sensor, at least one deformation sensor, and a processing device coupled to the physiological signal sensor and the deformation sensor. The physiological signal sensor is disposed on the wristband body at a position corresponding to at least one sensing portion of the wrist to detect a physiological signal of each sensing portion. The deformation sensor is disposed around each physiological signal sensor to detect deformation of each sensing portion and output a deformation signal. The processing device receives the physiological signal and the deformation signal, inquires a compensation signal corresponding to the deformation signal, and corrects the physiological signal by using the compensation signal, so as to output a corrected physiological signal of each sensing portion.