Biostimulation Waveform Control for Charge Discharge Balance
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Solution Overview
Problem
Existing living body stimulation devices struggle to discharge electric charges accumulated in living bodies effectively due to individual differences in capacitive properties, leading to waveform distortion.
Innovation Solution
A living body stimulation device that alternately generates sine wave pulse groups and discharge pulse groups using a transformer and switches, with a control unit to manage the timing of these groups, thereby discharging electric charges while suppressing waveform distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If discharge pulses are provided to suppress pseudo-sine wave distortion created by electric charge accumulated in a living body, then waveform distortion is reduced, but it becomes difficult to set discharge pulses in accordance with individual differences among living bodies
Solution Approach 1:
The patent applies dynamics by making the discharge pulse parameters variable and adaptive. The control unit dynamically adjusts the number of discharge pulses, their timing, and intensity based on real-time detection of the living body's capacitive properties. This allows the system to maintain waveform accuracy while adapting to individual differences among users, resolving the contradiction between fixed waveform control and individual adaptability.
Solution Approach 2:
The patent implements feedback mechanisms where the control unit continuously monitors the living body's electrical characteristics and adjusts discharge pulse parameters accordingly. By measuring the actual waveform distortion and capacitive properties, the system provides feedback to optimize discharge pulse settings, thereby maintaining waveform accuracy while accommodating individual variations in living body properties.
2Power
If pulse width is varied to form pseudo-sine waves using living body capacitive properties, then stimulation effectiveness is improved, but waveform distortion increases due to accumulated electric charge
Solution Approach 1:
The patent applies periodic action by inserting discharge pulses at regular intervals within the pulse train. These periodic discharge pulses reset the accumulated electric charge on the living body capacitor at strategic moments, preventing excessive waveform distortion while maintaining the overall pseudo-sine wave structure. This periodic intervention allows the system to sustain effective stimulation without compromising waveform accuracy.
Solution Approach 2:
The patent converts the harmful effect of accumulated electric charge (which causes waveform distortion) into a beneficial mechanism. By deliberately controlling discharge pulses to release accumulated charge, the system transforms the potential harm of charge buildup into a useful feature that maintains waveform fidelity. The accumulated charge is periodically discharged in a controlled manner to preserve the pseudo-sine wave shape, turning a problem into a solution.
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 effectively discharges electric charges in living bodies, reducing waveform distortion and harmonics, providing a softer stimulation by making the waveform more analogous to a sine wave.
Implementation Method 1
a transformer; a first switch configured to pass, through a primary-side winding of the transformer, a current in a predetermined direction
Data Source
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Figure 3A
AI summary
To discharge electric charges accumulated in a living body while suppressing the influence of individual differences among living bodies, a living body stimulation device of the present disclosure is configured to output a stimulation signal to a living body, and includes a transformer, a first switch, a second switch, a control unit, and an outputting unit. The control unit generates a first drive signal including a first sine wave pulse group constituted by first pulses for turning on the first switch, and a first discharge pulse group constituted by the first pulses; generates a second drive signal including a second sine wave pulse group constituted by second pulses for turning on the second switch, and a second discharge pulse group constituted by the second pulses; and alternately generates the first sine wave pulse group and the second sine wave pulse group, to thereby cause the outputting unit to output the stimulation signal which becomes a pseudo-sine wave. The control unit also alternately generates the first pulses of the first discharge pulse group and the second pulses of the second discharge pulse group.