Ground Electrode Contact Control for Human Body Communication
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Solution Overview
Problem
Human body communication systems face inefficiencies in signal loss and power consumption due to inconsistent contact of ground electrodes with body parts like wrists and fingertips, leading to increased signal loss and power usage.
Innovation Solution
An apparatus and method for automatically controlling ground electrode contact based on resistance measurements between signal and ground electrodes, determining whether to maintain or break contact based on resistance values to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the ground electrode contacts the human body, then signal loss is reduced in certain body positions (wrist), but signal loss increases in other body positions (fingertip)
Solution Approach 1:
The patent applies the dynamics principle by making the ground electrode contact state changeable rather than fixed. The system dynamically adjusts whether the ground electrode contacts the human body based on real-time resistance measurements. When the device is worn on the wrist, the ground electrode contacts the body to reduce signal loss; when worn on the fingertip, it breaks contact to avoid increasing signal loss. This dynamic adaptation resolves the contradiction between reducing signal loss and maintaining versatility across different body positions.
Solution Approach 2:
The patent applies the parameter changes principle by using resistance value as a key parameter to determine the ground electrode contact state. The system measures the resistance between the signal electrode and ground electrode, and based on the resistance value threshold, it decides whether to maintain or break the ground electrode contact. This parameter-based control enables the system to adapt to different body positions (wrist vs. fingertip) and optimizes signal loss for each position, thereby resolving the contradiction between signal loss reduction and adaptability.
2Loss of energy
If the ground electrode contacts the human body, then power consumption increases, but signal loss may be reduced
Solution Approach 1:
The patent applies the parameter changes principle by using resistance value as a decision parameter to control the ground electrode contact state. When the measured resistance exceeds a predetermined threshold (indicating fingertip contact), the system breaks the ground electrode contact to reduce power consumption. When the resistance is below the threshold (indicating wrist contact), the system maintains contact to reduce signal loss. This parameter-based control strategy resolves the contradiction between minimizing signal loss and reducing power consumption by optimally selecting the contact state based on resistance measurements.
Solution Approach 2:
The patent applies the feedback principle by continuously measuring the resistance between the signal electrode and ground electrode, and using this feedback information to control the ground electrode contact state. The system forms a closed-loop control where the resistance measurement feedback determines whether to maintain or break the ground electrode contact, thereby dynamically optimizing the balance between signal loss and power consumption based on actual wearing conditions.
3Loss of energy
If the ground electrode contacts the human body, then signal loss is reduced for wrist contact, but the system lacks adaptability to different contact locations
Solution Approach 1:
The patent applies the dynamics principle by making the ground electrode contact state dynamically adjustable based on detected body position. The system uses resistance measurement to detect whether the device is worn on the wrist or fingertip, and accordingly dynamically switches the ground electrode between contact and non-contact states. This dynamic adaptation enables the system to maintain optimal signal loss performance across different body positions, resolving the contradiction between signal loss reduction and adaptability.
Solution Approach 2:
The patent applies the parameter changes principle by using resistance value as a key parameter to determine the ground electrode contact state. The system measures resistance between electrodes and compares it against a threshold to infer body position (wrist vs. fingertip). Based on this parameter analysis, it adjusts the ground electrode contact state accordingly, enabling adaptive optimization of signal loss for different contact locations and resolving the contradiction between signal loss reduction and adaptability.
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
Minimizes signal loss and power consumption by determining the appropriate contact status of the ground electrode according to the location of communication devices on the body, enhancing the efficiency of human body communication systems.
Implementation Method 1
a resistance measuring unit for applying a predetermined voltage to a human body through a signal electrode, to measure a resistance value between the signal electrode and the ground electrode
Data Source
AI summary
Provided are an apparatus and a method for controlling human body contact of ground electrode, and a human body communication system using the same. The apparatus includes a resistance measuring unit for applying a predetermined voltage to a human body through a signal electrode, to measure a resistance value between the signal electrode and the ground electrode; a contact control unit for determining whether the ground electrode needs to contact the human body by using the measured resistance value, to provide control information associated with human body contact; and a contact performing unit for bringing the ground electrode into contact or out of contact with the human body according to the control information.