Portable Piezoelectric Blood Pressure Sensor with Micro Pump Back Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for measuring blood pressure are limited in accuracy over extended periods and require professional medical equipment, making continuous monitoring at home challenging.
Innovation Solution
A portable, wireless, self-powered sensor system using piezoelectric layers and a micro pump to measure continuous blood pressure patterns, combined with a XGBoost-based data model for accurate prediction, allowing for 24-hour ambulatory monitoring without the need for hospital equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional cuff-based oscillometry or applanation tonometry is used, then blood pressure can be measured, but only isolated casual measurements are obtained with limited accuracy over extended time periods
Solution Approach 1:
The patent divides the measurement function into two separate piezoelectric layers: one for detecting pulse wave signals and another for providing back pressure. This segmentation allows continuous monitoring while maintaining measurement precision by optimizing each layer's function independently.
Solution Approach 2:
The patent introduces a back pressure generation device as an intermediary component that provides controlled pressure to the piezoelectric layers. This intermediary mechanism enables continuous contact with the artery while maintaining accurate measurement conditions, resolving the contradiction between continuous monitoring and measurement precision.
2Ease of operation
If professional medical equipment is used, then accurate blood pressure measurement is achieved, but the equipment is complex and cannot be used for home monitoring
Solution Approach 1:
The patent replaces complex mechanical blood pressure measurement systems with piezoelectric-based sensing. The piezoelectric layers convert mechanical pressure from blood pulse directly into electrical signals, eliminating the need for complex mechanical components while maintaining measurement accuracy and enabling portable home use.
Solution Approach 2:
The patent changes the fundamental measurement parameter from mechanical displacement (traditional methods) to electrical charge generation (piezoelectric effect). This parameter change enables miniaturization and portability while preserving measurement precision, allowing accurate blood pressure monitoring at home.
3Extent of automation
If manual cuff with stethoscope is used, then blood pressure can be measured, but a trained medical professional is required
Solution Approach 1:
The patent implements self-service measurement capability where the piezoelectric sensor automatically detects pulse waves and the back pressure device automatically maintains contact pressure. The system performs measurements without requiring trained medical professionals to operate it, while keeping the operation simple for users.
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 provides accurate and continuous blood pressure monitoring, reducing fatalities and medical costs associated with cardiovascular and cerebrovascular diseases by enabling precise, long-term data collection and analysis.
Implementation Method 1
The sensing device includes a first piezoelectric layer and a second piezoelectric layer
Implementation Method 2
The force generation device includes a micro pump configured to pump up a first micro airbag and a second micro airbag
Data Source
AI summary
A portable blood pressure sensor comprises a sensing device, a force generation device, a first processor, a first flexible layer, and a second flexible layer. The sensing device comprises a first piezoelectric layer, and a second piezoelectric layer. The force generation device provides back pressure to the first and second piezoelectric layers. The first processor is electrically connected to the sensing device and the force generation device. The second flexible layer encapsulates the sensing device, the force generation device, and the first processor on the first flexible layer.