Vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator

A vector impedance and adaptive technology, applied in artificial respiration, physical therapy, etc., can solve problems such as insufficient reliability and potential safety hazards, and achieve high safety effects

Active Publication Date: 2014-10-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of insufficient reliability and potential safety hazards of existing transcutaneous electrical stimulation devices, and provides an adaptive multi-channel transcutaneous electrical stimulation device based on vector impedance feedback

Method used

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  • Vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator
  • Vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator
  • Vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator

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specific Embodiment approach 1

[0019] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the self-adaptive multi-channel percutaneous electrical stimulator based on vector impedance feedback described in this embodiment, it includes controller 1, DDS chip 2, signal multiplexing circuit 3, electrical stimulation circuit 4, electrode multiplexing circuit 5. Electrode 6, vector impedance measurement excitation circuit 7 and vector impedance measurement feedback circuit 8; electrode 6 is attached to the skin surface of the human body;

[0020] The controller 1 first sends an impedance measurement command to the DDS chip 2, the signal multiplexing circuit 3 and the electrode multiplexing circuit 5, and the DDS chip 2 outputs the impedance measurement signal to the vector impedance measurement excitation circuit 7 through the signal multiplexing circuit 3, and the vector impedance measurement excitation circuit 7 The circuit 7 outputs an impedance measurement excitation...

specific Embodiment approach 2

[0026] Specific implementation mode two: the following combination figure 2 Describe this embodiment mode. This embodiment mode will further explain Embodiment 1. The DDS chip 2 has at least two output channels: channel 0 and channel 1. Each output channel has two positive and negative output ports, which are respectively CH0+, CH0- and CH1+, CH1-;

[0027] Signal multiplexing circuit 3 is realized by analog switch S0;

[0028] When the analog switch S0 is set to 1, the DDS chip 2 outputs the electrical stimulation waveform, and channel 0 and channel 1 are connected in series; CH0+ is connected to CH1- and serves as the input terminal IN+ of the electrical stimulation circuit 4; CH0- is connected to CH1+ and serves as the electrical stimulation circuit The input terminal IN- of 4; the input terminals IN+ and IN- receive the electrical stimulation waveform to the electrical stimulation circuit 4, and the electrode ground MGND is connected to the actual ground GND;

[0029] W...

specific Embodiment approach 3

[0030] Specific implementation mode three: the following combination image 3 Describe this embodiment, this embodiment will further explain Embodiment 1, the electrical stimulation circuit 4 includes a differential amplifier A, a differential amplifier B, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; The non-inverting input terminal is connected to the input terminal IN+ through a resistor R1; the inverting input terminal of the differential amplifier A is connected to the input terminal IN- through a resistor R2; a resistor R3 is connected in parallel between the inverting input terminal of the differential amplifier A and the electrical stimulation waveform output terminal OUT+;

[0031] The non-inverting input terminal of the differential amplifier B is connected to the input terminal IN- through the resistor R5; the inverting input terminal of the differential amplifier B is connected to the input terminal IN+ through the resi...

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Abstract

The invention discloses a vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator and belongs to the field of the biological, mechanical and electrical integration technology. The vector impedance feedback based self-adaption multichannel transcutaneous electrical stimulator aims at solving the problems that the existing transcutaneous electrical stimulator is insufficient in reliability and has potential risks. According to the scheme, a controller firstly sends an impedance measurement command to a DDS chip, a signal multiplexing circuit and an electrode multiplexing circuit and the DDS chip outputs impedance measurement signals to a vector impedance measurement exciting circuit and impedance measurement exciting signals to electrodes through the signal multiplexing circuit; meanwhile a vector impedance measurement feedback circuit feeds back an electrode-skin impedance measurement result to the controller; the controller adjusts contact states of the electrodes and the skin according to the measurement result and accordingly adjusts electrical stimulus parameters to change the electrode-skin impedance to enable the stimulator to be in a transcutaneous electrical stimulation state when safety conditions are satisfied; the controller then gives out a transcutaneous electrical stimulation command and an electrical stimulation circuit outputs electrical stimulation currents to the electrodes and performs transcutaneous electrical stimulation on human bodies.

Description

technical field [0001] The invention relates to a transcutaneous electrical stimulation system, which belongs to the technical field of biological mechatronics. Background technique [0002] Vector impedance measurement is a technology that simultaneously measures the resistance, capacitive reactance and inductive reactance characteristics of the object to be measured. It converts the electrical characteristics of the object into a complex number, and uses the real part of the complex number to represent the resistance of the object, and the imaginary part to represent the non-conductivity of the object. resistive reactance. Compared with pure resistance measurement, it not only describes the DC volt-ampere characteristics of the object, but also describes the AC frequency band characteristics of the object. [0003] Transcutaneous electrical stimulation is an electrical stimulation method in which electrodes are laid on the surface of the human skin to release current to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/36
Inventor 黄琦姜力赵京东杨大鹏樊绍巍刘宏曾博
Owner HARBIN INST OF TECH
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