All-wireless distributed active electrode system for human physiological signal acquisition

A technology of active electrodes and human physiology, applied in telemetry patient monitoring, medical science, sensors, etc., can solve the problems of unrealized full wireless human physiological signal acquisition, achieve the elimination of electrode DC offset voltage, shorten the connection distance, suppress Effects of Impedance and Gain Mismatch

Inactive Publication Date: 2020-03-24
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The human physiological signal acquisition patch proposed in the patent [2] realizes the wireless transmission between the acquisition electrodes and the external storage module, but still needs to rely on the connection between the acquisition electrodes, and does not realize the full wireless human physiological signal acquisition

Method used

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  • All-wireless distributed active electrode system for human physiological signal acquisition
  • All-wireless distributed active electrode system for human physiological signal acquisition

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Embodiment Construction

[0018] The following will combine figure 1 The process of fully wireless distributed human physiological signal acquisition and wireless common mode feedback is analyzed, and the present invention is further elaborated.

[0019] The biological electrodes of each channel convert the ion exchange activity of human cells into corresponding electrical signals, which are input to the input end of the instrumentation amplifier for amplification and output. Due to the offset and noise of the instrumentation amplifier itself, the offset noise cancellation technology such as auto-zero sampling or chopping modulation is used in the instrumentation amplifier to eliminate the offset and noise of the instrumentation amplifier itself. At the same time, due to the difference in the half-cell potential between different biological electrodes, this difference is reflected in the input of the instrumentation amplifier as the electrode DC offset voltage. The resulting dc offset voltage across e...

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Abstract

The invention belongs to the technical field of analog circuit signal processing, and particularly relates to an all-wireless distributed active electrode system for human physiological signal acquisition. The all-wireless distributed active electrode system comprises a bioelectrode, an instrument amplifier, an analog-to-digital converter, a transmitter, a receiver, a digital-to-analog converter,a common-mode detection module and a common-mode feedback amplifier which are in circuit connection in sequence; the bioelectrode, the instrument amplifier, the analog-to-digital converter and the transmitter are integrated to form an active electrode, and human body common-mode signals acquired by the active electrode are fed back to a right leg driving electrode through a transceiver to form a wireless common-mode feedback structure, so that impedance and gain mismatch of the active electrode are inhibited, and the common-mode rejection ratio of the whole system is increased. According to the invention, all-wireless transmission distributed human body physiological signal acquisition is finally realized by using the active electrode and a wireless common-mode feedback form.

Description

technical field [0001] The invention belongs to the technical field of analog circuit signal processing, and in particular relates to a fully wireless distributed active electrode system for collecting human physiological signals. Background technique [0002] With the improvement of people's living standards, the degree of concern for health has also increased. Human physiological signals such as ECG signals and EEG signals can effectively reflect the electrical activity process of the heart, brain and other organs excited. Doctors can find irregular changes in corresponding organs in the human body through relevant physiological signals of the human body. Therefore, human physiological signals have extremely important reference value in the basic functions and pathological research of the heart and brain and other organs. [0003] In traditional human physiological signal acquisition equipment, the acquisition electrodes are connected to the processing module through com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0402A61B5/0476A61B5/00
CPCA61B5/0006A61B5/7225A61B5/318A61B5/369
Inventor 吕良剑赵晓斌穆庚叶大蔚史传进
Owner FUDAN UNIV
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