Vascular State Measuring Device Using Eddy Currents
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Solution Overview
Problem
Current wearable devices for measuring heart rate and blood pressure using photoplethysmography (PPG) face accuracy issues due to incorrect wearing positions and individual differences in skin color and thickness, leading to measurement errors.
Innovation Solution
A non-invasive vascular state measuring device with a magnetoelectric effect sensing mechanism, featuring a signal transceiver with a tunnel structure and a control module that generates and processes electromagnetic signals to measure blood vessel states, avoiding errors caused by improper wearing and individual differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If photoplethysmography (PPG) is used for measuring heart rate and blood pressure, then the device can be made portable and convenient, but measurement accuracy deteriorates due to incorrect wearing position and individual differences in skin color and thickness
Solution Approach 1:
The patent replaces the optical measurement system (PPG) with an electromagnetic sensing system that uses a signal transceiver to generate electromagnetic signals and detect eddy currents induced in the body. This substitution eliminates the dependency on optical transmission through skin, thereby resolving the contradiction between portability and measurement accuracy.
Solution Approach 2:
The patent changes the measurement parameter from optical properties (light transmission and reflection) to electromagnetic properties (eddy current induction). By measuring electromagnetic responses instead of optical signals, the system achieves accurate measurements independent of skin color and thickness while maintaining portability.
2Stability of the object's composition
If a tunnel structure is used to arrange the to-be-measured part, then wearing stability improves, but device complexity increases
Solution Approach 1:
The tunnel structure serves multiple functions simultaneously: it guides the to-be-measured part into the correct position, maintains stable contact between the signal transceiver and the body, and ensures proper positioning for electromagnetic signal transmission. This multi-functionality achieves wearing stability without proportionally increasing device complexity.
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 device provides stable and accurate measurements by using an eddy current mechanism within a tunnel structure, improving convenience and reducing measurement errors associated with skin color and thickness variations.
Implementation Method 1
The signal transceiver is configured to output at least a first electromagnetic signal to the to-be-measured part towards the tunnel structure to generate an eddy current at the to-be-measured part
Implementation Method 2
receive a second electromagnetic signal generated by the corresponding eddy current
Data Source
AI summary
A vascular state measuring device includes a signal transceiver and a control module. The signal transceiver has a tunnel structure for arranging a to-be-measured part. The signal transceiver is configured to output an electromagnetic signal to the to-be-measured part towards the tunnel structure to generate an eddy current at the to-be-measured part, and receive an electromagnetic signal generated by the corresponding eddy current. The control module is coupled with the signal transceiver, and the control module includes a signal generation unit and a processing unit. The signal generation unit is configured to generate an AC signal and provide the AC signal to the signal transceiver to generate the first electromagnetic signal. The processing unit is configured to calculate a characteristic signal based on the first electromagnetic signal and the second electromagnetic signal. The characteristic signal corresponds to at least one state of at least one blood vessel at the to-be-measured part.