Tunable Matching Circuit for Human Body Communication Detection
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Solution Overview
Problem
The accuracy of biological detection systems is compromised due to the variability in human body conductivity influenced by factors such as skin condition, humidity, and temperature.
Innovation Solution
A detection device incorporating a Human Body Communication (HBC) module, couplers, ADCs, an electrode element, a signal processor, and a tunable matching circuit, which adjusts impedance based on the strength ratio of digital signals to improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used, then the detection system is simple, but the detection accuracy deteriorates due to variability in human body conductivity
Solution Approach 1:
The patent applies dynamics by making the matching circuit impedance adjustable rather than fixed. The impedance adjustment mechanism allows the system to adapt dynamically to varying skin conductivity conditions, transforming a static detection system into a dynamic one that can compensate for biological variations in real-time
Solution Approach 2:
The patent changes the impedance parameter of the matching circuit to optimize detection accuracy. By adjusting the impedance value based on detected skin conductivity characteristics, the system compensates for variations in human body conductivity, thereby maintaining high measurement precision across different physiological states
2Adaptability or versatility
If fixed impedance matching is used, then the device complexity is low, but the adaptability to different skin conditions deteriorates
Solution Approach 1:
The patent implements feedback by using the detected physiological signal to adjust the matching circuit impedance. The system continuously monitors the electrical characteristics of the skin and uses this information to modify the impedance setting, creating a closed-loop control system that adapts to changing skin conditions
Solution Approach 2:
The impedance matching circuit transitions from a fixed configuration to a dynamic adjustable system. The ability to change impedance values in response to detected skin characteristics enables the system to adapt to various skin conditions, age groups, and environmental factors
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 significantly enhances detection accuracy by dynamically adjusting impedance matching to compensate for variations in human body conductivity, thereby improving the reliability of biological detection systems.
Implementation Method 1
an HBC (Human Body Communication) module, a first coupler, a first ADC (Analog-to-Digital Converter), an electrode element, a second coupler, a second ADC
Implementation Method 2
The impedance value of the tunable matching circuit is selectively adjusted according to the control signal
Data Source
AI summary
A detection device includes an HBC (Human Body Communication) module, a first coupler, a first ADC (Analog-to-Digital Converter), an electrode element, a second coupler, a second ADC, a signal processor, and a tunable matching circuit. The HBC module generates an HBC signal. The first coupler generates a first branch signal according to the HBC signal. The first ADC converts the first branch signal into a first digital signal. The electrode element receives a physiological signal from a human body portion. The second coupler generates a second branch signal according to the physiological signal. The second ADC converts the second branch signal into a second digital signal. The signal processor generates a control signal according to the first digital signal and the second digital signal, thereby adjusting the impedance value of the tunable matching circuit.