Wireless Electrode Pairing for Accurate Biopotential Measurement
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Solution Overview
Problem
Existing biopotential measurement systems cause discomfort due to wire pressure and restrict movement when electrodes are attached to the body, and separating the devices into two units complicates reference potential determination.
Innovation Solution
A biosignal measurement system utilizing two electrode devices with non-inverting amplification circuits, quantization circuits, wireless transmitters, FM transmitters/receivers, and a biosignal generation device for wireless communication and signal adjustment, allowing separation of devices without losing biopotential measurement capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wire connects left and right electrodes to maintain reference potential, then biopotential measurement accuracy is maintained, but body movement is strongly restricted and discomfort increases
Solution Approach 1:
The patent replaces the mechanical wire connection between electrodes with wireless communication technology. Each electrode device includes a wireless communication unit that transmits measurement data and reference potential information wirelessly to the other electrode device, eliminating the physical wire constraint while maintaining measurement accuracy. This substitution of mechanical connection with electromagnetic communication resolves the contradiction between measurement precision and movement freedom.
2Ease of operation
If devices are separated into two units for comfort, then movement freedom increases, but reference potential determination becomes difficult
Solution Approach 1:
The patent introduces wireless communication as an intermediary between the separated electrode devices. Each device independently determines its own reference potential using local circuits (such as potential determination circuits that reference body potential), and the wireless communication transmits this reference information between devices. This intermediary mechanism enables separated devices to maintain coordinated reference potentials without complex inter-device wiring.
Solution Approach 2:
Each electrode device is equipped with independent potential determination capability, allowing it to self-determine its reference potential based on its local body contact. The device includes circuits that automatically establish a reference to body potential without requiring external calibration or complex inter-device coordination, simplifying the overall system while maintaining measurement accuracy.
3Ease of operation
If wires are cut and devices separated, then comfort and movement freedom improve, but biopotential measurement becomes difficult
Solution Approach 1:
The patent divides the traditional single-unit electrode system into two independent electrode devices, each capable of autonomous operation. Each device includes complete measurement functionality (amplifier, analog-to-digital converter, wireless communication unit), allowing them to function independently while maintaining coordinated measurement through wireless data exchange. This segmentation enables comfort and movement freedom while preserving measurement capability through distributed intelligence.
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
Enables easy and comfortable biopotential measurement by wireless communication between electrode devices, reducing discomfort and increasing freedom of movement while maintaining accurate signal measurement.
Implementation Method 1
a non-inverting amplification circuit that inputs the measured biopotential to a non-inverting amplifier terminal, amplifies the biopotential, and outputs the amplified biopotential
Implementation Method 2
an FM transmitter that converts a voltage signal output from the output terminal of the non-inverting amplifier circuit into an FM signal and transmits the FM signal to the other electrode device
Implementation Method 3
an FM receiver that receives the FM signal transmitted from the other electrode device to an own electrode device, converts the FM signal into a voltage signal
Data Source
AI summary
An embodiment is a biosignal measurement system including two electrode devices and a biosignal generation device. Each electrode device has an electrode for measuring a biopotential in a target human body, an amplifier circuit for amplifying the measured biopotential, a frequency modulation (FM) transmitter for converting an output signal from the amplifier circuit into an FM signal, an FM receiver for receiving an FM signal from the other electrode device and converting it into a voltage signal, an adjustment circuit for adjusting the voltage signal from the FM receiver and providing it as an input to the amplifier circuit, and a wireless transmitter for transmitting biopotential information. The biosignal generation device receives the biopotential information from both electrode devices and generates a biosignal waveform based on the received biopotential information.