Wearable Multi-Sensor Layout for Continuous Blood Pressure Monitoring
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Solution Overview
Problem
Traditional physiological detection equipment is large and lacks multi-functionality, making it unsuitable for long-term, real-time monitoring and home/ambulatory care, especially for conditions like heart failure, which requires continuous and accurate physiological signal detection.
Innovation Solution
A wearable physiological signal sensing system integrating a stethoscope for heart sound detection, ECG electrodes, and a blood oximeter on a circuit board, utilizing AI to estimate blood pressure from pulse wave transit time, with piezoelectric and capacitive sensors for signal processing and wireless connectivity to mobile devices and cloud servers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional physiological detection equipment is used, then measurement precision is maintained, but device complexity and size increase, making it unsuitable for long-term wearable monitoring
Solution Approach 1:
The patent combines multiple physiological detection functions (ECG, heart sound, respiratory rate, blood oxygen saturation) into a single integrated wearable device. The circuit board integrates multiple sensor modules, signal processing circuits, and wireless communication modules, allowing the device to perform comprehensive physiological monitoring without requiring multiple separate instruments.
Solution Approach 2:
The wearable device is designed with multi-functionality to detect various physiological parameters simultaneously. The stethoscope module detects heart sounds, ECG electrodes detect cardiac electrical activity, and the blood oximeter measures oxygen saturation, all within one device that can be worn continuously for long-term monitoring.
2Adaptability or versatility
If multiple sensors are integrated into one device, then adaptability and multi-functionality improve, but device complexity increases
Solution Approach 1:
The device is divided into distinct functional modules: a stethoscope module for heart sound detection, ECG electrodes for electrical activity detection, a blood oximeter module for oxygen saturation measurement, and a circuit board for signal processing. Each module is independently designed and then integrated, simplifying the overall system architecture and making the complex multi-functional device more manageable.
3Reliability
If traditional detection equipment is used, then reliability is maintained, but ease of operation decreases due to large size and single function
Solution Approach 1:
The wearable device utilizes flexible circuit boards and thin-film sensor structures to achieve a compact, lightweight form factor that can be comfortably worn on the body. The flexible substrate allows the device to conform to body contours, improving both wearability and portability while maintaining detection reliability through integrated sensors.
Data Source
AI summary
The present invention discloses a wearable sensing system for detecting physiological signals, which includes a system circuit board with upper and lower surfaces, a stethoscope is disposed on the lower surface for sensing the user's heart sound signal, and a plurality of electrocardiographic electrodes is disposed on the lower surface and adjacent to the stethoscope used to sense the user's ECG signal, and an oximeter is disposed on the upper surface to sense the user's blood oxygen concentration and pulse wave signal. The system circuit board is electrically connected to the stethoscope, the plurality of ECG electrodes and the oximeter. The system circuit board obtains the user's pulse transit time (PPT) by comparing the ECG signal with the pulse wave signal or by comparing the heart sound signal with the pulse wave signal. The PPT is used to calculate the user's continuous blood pressure.