Hydrogel Biosensor with Biometric Encryption
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Solution Overview
Problem
Conventional biochemical sensing systems fail to noninvasively and accurately detect biochemicals in naturally occurring biofluids without the need for electrostimulation and provide privacy safeguards, particularly in scenarios where active stimulation may be inappropriate or uncomfortable for users, such as bedridden, neonatal, or elderly populations.
Innovation Solution
A noninvasive biochemical sensor device utilizing a hydrogel layer to absorb and transport biofluids to electrochemical sensors, combined with a fingerprint scanner for biometric encryption, which eliminates the need for electrostimulation by leveraging natural perspiration and incorporates layers like carbon nanotubes and platinum for enhanced sensitivity and accuracy, ensuring secure data encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional electrostimulation-based biochemical sensing is used, then biochemical detection capability is improved, but user comfort and applicability to vulnerable populations deteriorates
Solution Approach 1:
The patent removes the electrostimulation component from the sensing system, extracting only the passive detection capability. The sensor uses natural perspiration as the analyte source without requiring electrical stimulation to induce sweat production, thereby eliminating discomfort while maintaining biochemical detection through the hydrogel-electrode interface
Solution Approach 2:
The system leverages the body's natural perspiration mechanism to provide the analyte for sensing. The hydrogel layer passively absorbs and transports sweat from the skin surface to the sensing electrode without requiring external stimulation, allowing the biological system to serve itself for sample provision
2Measurement precision
If conventional biochemical sensing is used, then biochemical detection is achieved, but data privacy and security deteriorates
Solution Approach 1:
The patent implements nested security by embedding multiple layers of protection within the data transmission architecture. Biometric templates are encrypted using individual-specific keys, and the encrypted data is further protected through secure communication protocols, creating nested layers of security that preserve privacy while enabling accurate biochemical monitoring
3Ease of operation
If passive natural perspiration sensing is used, then user comfort is improved, but detection sensitivity and accuracy deteriorates
Solution Approach 1:
The patent employs a composite sensing interface consisting of hydrogel material combined with conductive electrodes. The hydrogel provides efficient sweat absorption and transport properties, while the conductive materials ensure reliable electrical contact for detection. This composite structure enhances detection sensitivity by optimizing both sample collection and signal transduction without requiring electrostimulation
Solution Approach 2:
The hydrogel layer utilizes its porous structure to efficiently absorb and transport sweat from the skin surface to the sensing electrode. The porous network provides high surface area for sweat uptake and facilitates rapid mass transport of analytes to the detection interface, thereby maintaining high detection sensitivity through passive means
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 solution enables accurate, noninvasive, and secure detection of biochemicals through natural perspiration, reducing user discomfort and improving data privacy by using biometric encryption, thus providing a stable and reliable method for health monitoring.
Implementation Method 1
A noninvasive biochemical sensor device with a hydrogel layer to absorb and transport biofluids to electrochemical sensors
Implementation Method 2
obtaining, at a processor coupled to the biochemical sensing electrode and the reference electrode, a change in current across the biochemical sensing electrode and the reference electrode
Data Source
AI summary
Example implementations also include a method of sensing the presence and quantity of a biochemical by applying a current across a biochemical sensing electrode and a reference electrode, contacting a hydrogel layer to a biological surface, absorbing a biofluid from the biological surface into the hydrogel layer, obtaining, at a processor coupled to the biochemical sensing electrode and the reference electrode, a change in current across the biochemical sensing electrode and the reference electrode, and generating, at the processor, a quantitative biochemical response. Example implementations further include obtaining a biometric encryption key based on the biological surface, and encrypting the quantitative response based on a biometric encryption key. Example implementations further include contacting a fingerprint scanner to the biological surface, and obtaining a fingerprint pattern from the biological surface at the fingerprint scanner, where the biometric encryption key is based on the fingerprint pattern.