Piezoelectric Pulse Sensor With TFT Array and Induced Electrode
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Solution Overview
Problem
Current pulse measuring methods used by Chinese medicine practitioners lack accuracy in diagnosing physiological and pathological conditions due to limitations in effectively capturing and interpreting pulse signals from multiple positions on the wrist.
Innovation Solution
A sensing component comprising a piezoelectric pressure sensor with a piezoelectric material layer, thin film transistor array, and induced electrode, which measures pulses at multiple positions to generate corresponding signals, improving signal accuracy and range through the use of multiple transistors and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single pressure sensor is used to measure pulse, then the device structure is simple, but the measurement precision and signal accuracy are insufficient
Solution Approach 1:
The pressure sensing surface is divided into multiple independent sensing regions (first sensing region, second sensing region, third sensing region) that can detect pulses at different positions simultaneously. Each sensing region is associated with separate electrode structures and signal processing circuits, enabling multi-point pulse measurement to improve diagnostic accuracy while maintaining manageable system complexity through modular design
Solution Approach 2:
Multiple piezoelectric pressure sensors are integrated into a single sensing component assembly, combining the functions of multiple sensors into one unified device. The sensors are arranged in specific spatial configurations (e.g., along the wrist) to capture pulse signals from multiple anatomical positions simultaneously, achieving enhanced measurement precision without proportionally increasing overall device complexity
2Measurement precision
If multiple sensing positions are added to capture comprehensive pulse signals, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The sensing component is designed with universal applicability for detecting pulses at multiple anatomical positions (e.g., radial, ulnar, and intermediate positions on the wrist). The same basic sensor structure and electrode configuration are replicated and arranged to serve multiple sensing functions simultaneously, allowing the device to perform comprehensive pulse diagnosis without requiring fundamentally different structures for each sensing position
Solution Approach 2:
The sensing component employs a nested or layered structure where multiple sensing elements are arranged in spatial configurations (e.g., stacked layers or concentric arrangements). The piezoelectric material layers, electrode patterns, and transistor arrays are integrated in a compact multi-layer architecture that allows multiple sensing positions to be accommodated within a single component footprint, reducing overall device complexity while maintaining multi-position detection capability
3Measurement precision
If signal processing circuits are enhanced to reduce distortion, then the measurement precision improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces complex analog signal processing circuits with a digital imaging sensor-based detection system. Instead of using traditional mechanical or electronic signal conditioning circuits to reduce distortion, the system captures pulse signals as optical or electrical images using the digital imaging sensor, which inherently provides high-fidelity signal acquisition with minimal distortion. This substitution simplifies the manufacturing process by leveraging mature digital sensor technology rather than requiring precision analog circuit fabrication
Solution Approach 2:
The patent changes the fundamental detection parameter from electrical voltage output (requiring complex signal conditioning) to optical or digital signal output from the imaging sensor. By converting the pulse detection mechanism to operate in the optical/digital domain rather than the electrical analog domain, the system achieves high signal accuracy without requiring complex signal processing circuits, thereby improving ease of manufacture while maintaining measurement precision
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
Enhances the accuracy of pulse measurement by accurately capturing pulse signals at multiple positions, allowing for more precise diagnosis of health conditions by correcting peak values and reducing signal distortion, thereby improving the overall pulse measurement method.
Implementation Method 1
a piezoelectric material layer, a thin film transistor array and an induced electrode. The piezoelectric material layer is configured to measure pulse at multiple positions to generate the corresponding multiple pulse signals
Data Source
AI summary
A sensing component includes multiple piezoelectric pressure sensors. The piezoelectric pressure sensor includes a piezoelectric material layer, a thin film transistor array and an induced electrode. The piezoelectric material layer is configured to measure pulse at multiple positions to generate the corresponding multiple pulse signals. The thin film transistor array electrically coupled to the piezoelectric material layer includes multiple transistors. The transistor includes a first terminal, a second terminal and a control terminal. The first terminal is configured to receive one of the pulse signals. The second terminal coupled to a data line is configured to output a first sensing signal according to the one of the pulse signals. The control terminal is configured to receive a clock signal. The induced electrode coupled to the piezoelectric material layer is configured to receive another one of the pulse signals to output a second sensing signal.