CN110638448A - Full-flexible polymer interface for bidirectional human-computer interaction application - Google Patents

Full-flexible polymer interface for bidirectional human-computer interaction application Download PDF

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Publication number
CN110638448A
CN110638448A CN201910945975.4A CN201910945975A CN110638448A CN 110638448 A CN110638448 A CN 110638448A CN 201910945975 A CN201910945975 A CN 201910945975A CN 110638448 A CN110638448 A CN 110638448A
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China
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human
polymer
bidirectional
electrical stimulation
signals
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CN201910945975.4A
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Chinese (zh)
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董文涛
李文锋
姚道金
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East China Jiaotong University
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East China Jiaotong University
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Priority to CN201910945975.4A priority Critical patent/CN110638448A/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25Bioelectric electrodes therefor
    • A61B5/279Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/296Bioelectric electrodes therefor specially adapted for particular uses for electromyography [EMG]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/24Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316Modalities, i.e. specific diagnostic methods
    • A61B5/389Electromyography [EMG]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/02Details
    • A61N1/04Electrodes
    • A61N1/0404Electrodes for external use
    • A61N1/0408Use-related aspects
    • A61N1/0452Specially adapted for transcutaneous muscle stimulation [TMS]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/36003Applying electric currents by contact electrodes alternating or intermittent currents for stimulation of motor muscles, e.g. for walking assistance
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/36014External stimulators, e.g. with patch electrodes

Abstract

The invention discloses a man-machine interface of an integrated polymer sensing and electrical stimulation device, which comprises a polymer strain and pressure sensing module, a polymer electrical stimulation module and the like. The function perception module records human electrophysiology and motion signals, the stimulation module generates electrical stimulation signals to activate human skin activity under the action of an external electric field, the influence of noise signals on the electrophysiology and motion signals is inhibited, and the signal-to-noise ratio of perception signals is improved. The invention also provides a preparation method of the bidirectional human-computer interaction oriented polymer sensing and electrical stimulation interface, which provides long-time stable controllable electrical stimulation for people and provides a comfortable interaction interface for feeding the machine state back to the human body.

Description

Full-flexible polymer interface for bidirectional human-computer interaction application
Technical Field
The invention relates to the field of flexible electronic manufacturing and bio-electro-mechanical integration, in particular to a bidirectional man-machine interface based on a polymer electrical stimulation device and a preparation method thereof.
Background
The polymer functional material plays a decisive role in the flexible electronic device, is widely applied to the fields of physiological health monitoring, human-computer interaction, biomedical treatment and the like, has urgent need to improve the perception capability of the polymer electronic device in the perception application of weak bioelectricity of a human body, integrates the perception and stimulation functions, can improve the executive capability of human body actions, records the motion and physiological information of the human body in real time, and provides a bidirectional interaction polymer human-computer interface for human bodies and robots.
The human-computer interface oriented to the bidirectional human-computer interaction application integrates a perception and stimulation function module, is an important flexible electronic device, records physiological signals of a human body in real time, generates stimulation signals to act on muscles, improves the perception capability of the human body, and has wide application prospects in the fields of physiological health monitoring, disease diagnosis and the like. At present, a functional electrical stimulation device is invented by Yangzui, Miao Sheng Wei and the like, stimulation current acts on muscles, and the muscle actions of normal people are simulated by setting the time sequence of the actions of each limb part of a human body, so that the rehabilitation treatment of a patient is realized (the Yangzui, Miao Sheng Wei, Xuxian Biao, a functional electrical stimulation device and a method thereof: CN 201220627712.2.). The invention discloses a Qiushuang precision control method of functional electrical stimulation, belonging to the technical field of instruments for helping disabled people to recover by utilizing electrical pulse stimulation (Qiushuang, Mingdong, Xurui, a precision control method of functional electrical stimulation: CN 201110131379.6). However, at present, the interaction capability between a person and the external environment has the defects of how to effectively record human physiological signals and stimulate the controllable regulation of human skin, and the like, and no feasible electronic device exists in the research of the fully flexible polymer interface oriented to the bidirectional human-computer interaction application, so that the interaction capability between the person and the external environment is effectively solved by designing and preparing the fully flexible polymer interface, the precision of recording the physiological signals is improved, and the controllable regulation of stimulating the human skin signals is improved.
As a high-precision device which can be embedded into or cover a human body, the fully flexible polymer interface for bidirectional human-computer interaction application can record the physiological health state (electrophysiological signals, temperature, blood pressure, movement and the like) of the human body in real time, generate stimulation information such as electrotactile, sound, light, temperature and the like, stimulate the perception capability of human skin and improve the signal-to-noise ratio of perception signals, provides a bidirectional human-computer interface for information interaction between a human body and an external environment, expands the interactivity between the human body and the external environment, and improves the life quality of the human body and the adaptability to the external environment.
Disclosure of Invention
In view of the above drawbacks or needs for improvement of the prior art, a first object of the present invention is to provide a bidirectional human-machine interface based on a polymer electrical stimulation device, which is designed with a strain gauge and pressure sensing module based on conductive polymer 1, a dry electro-physiological electrode based on conductive polymer 2 and an electro-physiological function stimulation module based on conductive polymer 3, all integrated on the same flexible substrate. The function perception module records human electrophysiology and motion signals, the stimulation module generates electrical stimulation signals to activate human skin activity under the action of an external electric field, the influence of noise signals on the electrophysiology and motion signals is inhibited, and the signal-to-noise ratio of perception signals is improved. The fully flexible polymer sensing and stimulating device integrating the polymer sensing and electrical stimulation functions and oriented to the bidirectional human-computer interaction application is provided, the recording of electrical functional signals of human skin and the activity and execution capacity of stimulating the human skin are realized, technical support is provided for signal interaction between a human body and a robot, and the fully flexible polymer sensing and stimulating device can be widely applied to the bidirectional human-computer interaction application.
In view of the above drawbacks or needs for improvement of the prior art, a second object of the present invention is to invent a method for preparing a fully flexible polymer human-machine interface for bidirectional human-machine interaction applications. The human-computer interaction interface based on the flexible polymer integrates the sensing and electrical stimulation functions, the related main functional material is the flexible polymer, the preparation of the human-computer interface mainly relates to the synthesis and patterning of the functional material, the polymer functional material is prepared by stirring and synthesizing different powdered materials and solution by adopting a solution method, then the materials are appointed to be poured into an appointed mould, and the preparation of the thin film material is completed under the actions of light, heat and the like.
Further, the preparation method of the fully flexible polymer human-computer interface facing the bidirectional human-computer application comprises the following steps:
(1) the preparation of the flexible elastic substrate is completed through the processes of solution mixing, vacuumizing, spin coating, curing and the like;
(2) preparing conductive polymers 1, 2 and 3 by a solution method and a gel method respectively;
(3) completing the patterning of the conductive polymers 1, 2 and 3, and measuring signals such as strain, capacitance pressure, physiological electrodes, electric stimulation work and the like;
(4) completing the preparation of strain, capacitance pressure, physiological electrode, electric stimulation work and the like;
(5) integrating devices of different functional modules on an elastic substrate, and screen-printing a carbon paste lead to lead out signals of the sensing and electrical stimulation functional modules;
(6) experiments prove that the polymer man-machine interface is applied to bidirectional man-machine interaction and provides a bidirectional information interaction channel for a human and a robot.
Generally, compared with the prior art, the fully flexible polymer man-machine interface oriented to bidirectional man-machine application, the integrated physiological and motion function sensing module and the functional electrical stimulation module are designed and prepared by adopting organic polymers, and have the characteristics of biocompatibility, flexibility and the like. The perception function module records physiological and motion signals at the same time, and the stimulation module stimulates the skin surface of a human body, suppresses noise signals and improves the signal-to-noise ratio of the physiological signals.
The invention provides a bidirectional information interaction interface between a human body and a robot body by a designed polymer function sensing and electrical stimulation device facing to a bidirectional human-computer application full-flexible polymer human-computer interface, has wide application space for the fields of health rehabilitation, biological medical treatment and the like of human bodies, and supports the application of wearable electronics and rehabilitation training of disabled people.
In conclusion, the fully flexible polymer human-computer interface oriented to the bidirectional human-computer application integrates the sensing and electrical stimulation functional module, the soft deformation characteristic is compatible with the skin surface, the sensing enhancement and the action execution capability of the inconvenient people are assisted, and the fully flexible polymer human-computer interface is a research hotspot of the next generation wearable electronic device and the bidirectional human-computer interaction application.
Drawings
Fig. 1 is a fully flexible polymer functional device integrating physiological sensing and stimulus feedback, which is used in the field of bidirectional human-computer interaction. (a) A bidirectional man-machine interaction application scene graph based on polymer perception and stimulation; (b) a bidirectional man-machine interaction information interaction graph; (c) a bidirectional man-machine interaction device based on polymer physiological sensing and physiological feedback stimulation; (d) and a structural layout diagram of a polymer bidirectional human-computer interaction interface based on physiological sensing and physiological feedback.
Fig. 2 is a process diagram of a bidirectional human-computer interaction oriented preparation process of a fully flexible polymer functional device integrating physiological sensing and stimulus feedback.
Fig. 3 shows typical electrical stimulation signals and physiological sensing signals. (a) A pulsed electrical stimulation signal; (b) typical functional electrical stimulation signals; (c) surface electromyographic signals; (d) strain signal of the skin surface.
The symbolic meanings in the figures are as follows:
11-the human body; 12-a robot body; 13-a bidirectional human-machine interaction interface; 14-typical physiological feedback signal; 15-typical motion feedback signal. 21-soft biological tissue; 22-physiological recording electrode functional principle; 23-electrical stimulation signal electrode functional principle; 24-a surface electrode; 25-electrical stimulation device. 31-a flexible substrate; 32-an electrical stimulation functional module; 33-electrical stimulation signal wiring; 34-a strain sensing module; 35-a pressure sensing module; 36-a physiological sensing module; 37-physiological electrode sensing lead.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a fully flexible polymer functional device integrating physiological sensing and stimulus feedback is used in the field of bidirectional human-computer interaction. Fig. a is a bidirectional man-machine interaction application scene based on polymer sensing and stimulation, a flexible polymer man-machine interface 13 is attached to the surface of human skin, an interface is provided for bidirectional information interaction between a human body 11 and a robot body 12, a typical physiological feedback signal 14 and a motion feedback signal 15 stimulate the human body under the action of an external excitation signal, and the activity of human muscle is enhanced. FIG. 1b is a schematic diagram of typical bi-directional human-computer interaction information, in which a polymer interface generates an electrical stimulation signal to act on a human body under the action of external electrical stimulation information, and simultaneously acquires electrophysiological and motion signals of the skin surface of the human body; FIG. 1c is a schematic diagram of the operation of the bidirectional human-computer interaction device based on the physiological sensing and physiological feedback stimulation of the polymer; a physiological recording electrode function working process 22 in the polymer interface is used for recording physiological signals of the soft biological tissue 21 through a surface electrode 24; under the action of an external electric field, the electrical stimulation functional module piece 25 in the polymer interface generates an electrical functional stimulation signal to act on the soft biological tissue 21 by the electrical stimulation signal electrode functional principle 23. Fig. 1d is a structural layout diagram of a polymer bidirectional human-computer interaction interface based on physiological sensing and physiological feedback, which mainly comprises: a flexible substrate 31; an electrical stimulation function module 32; an electrical stimulation signal wiring 33; a strain sensing module 34; a pressure sensing module 35; a physiological sensing module 36; and a physiological electrode lead 37. The polymer interface for the bidirectional man-machine interaction application records human physiology and motion signals, and simultaneously generates corresponding excitation signals, so that noise signals are suppressed, and the human perception, rehabilitation training and action execution capacity is enhanced.
Fig. 2 is a method for preparing a fully flexible polymer man-machine interface oriented to bidirectional man-machine application, which mainly comprises the following steps:
(1) mixing polydimethylsiloxane and a curing agent thereof together in a ratio of 10:1, and finishing the preparation of the flexible elastic substrate through processes of vacuumizing, spin coating, curing and the like;
(2) preparing a conductive polymer 1 by mixing conductive nano particle carbon black with a polydimethylsiloxane solution; preparing conductive polymers 2 and 3 by a material gel method;
(3) respectively completing patterning of the conductive polymers 1, 2 and 3, and measuring signals such as strain, capacitance pressure, physiological electrodes and electric stimulation work;
(4) completing the preparation of a strain sensor based on the polymer 1, a capacitance sensor based on the polymer 2, an electrophysiological electrode based on the polymer 1 and an electric stimulation device of the conductive polymer 3;
(5) respectively integrating the sensing function module and the stimulation function module on a polydimethylsiloxane elastic substrate, and screen-printing a carbon paste lead to lead out signals of the sensing and electrical stimulation function modules;
(6) the prepared polymer human-computer interface is attached to the surface of the skin, the sensing and stimulating functions of the polymer human-computer interface are tested, and experiments verify that the polymer human-computer interface is applied to bidirectional human-computer interaction, so that a bidirectional information interaction channel is provided for a human and a robot.
To facilitate the application of the fully flexible polymer human-machine interface in physiological health monitoring, fig. 3a-b show that a common functional electrical stimulation signal (generally, a corresponding stimulation signal is generated by a robot) acts on an electrical stimulation module, and then a corresponding electrical stimulation signal is generated to act on the surface of human skin to stimulate the activity of the human skin, which is helpful for suppressing noise signals. In the perception function module, the information about the characteristics of the human body movement and the physiological signals is recorded, and the corresponding strain information (fig. 3 c) and the corresponding physiological signals (fig. 3 d) are recorded by the designed polymer man-machine interface. The designed polymer human-computer interface records human physiological health information in real time, and simultaneously, an external electric signal acts on the electric stimulation module and acts on the surface of human skin to stimulate the activity of the skin, inhibit noise signals, improve the precision of the polymer human-computer interface in recording physiological signals and provide a bidirectional human-computer interaction interface for people and the external environment.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (3)

1. A polymer interface facing to bidirectional human-computer interaction application comprises a strain, pressure and electrophysiological potential sensing module and an electrical stimulation module, the polymer interface acts on the surface of skin, a bidirectional information interaction channel is provided for information interaction between a human body and a robot, sensing and electrical stimulation functions are designed and prepared by adopting polymer materials, and the polymer interface has good flexibility and good compatibility with the skin.
2. The bi-directional human-computer interaction application-oriented polymer interface of claim 1, wherein the stimulation function module can suppress noise in the sensing process of the physiological and motion signals and improve the signal-to-noise ratio of the physiological and motion signals.
3. The polymer interface for bidirectional interactive applications according to claim 1, the preparation method thereof comprises the following steps:
(1) the preparation of the flexible elastic substrate is completed through the processes of solution mixing, vacuumizing, spin coating, curing and the like;
(2) preparing conductive polymers 1, 2 and 3 by a solution method and a gel method respectively;
(3) completing the patterning of the conductive polymers 1, 2 and 3, and measuring signals such as strain, capacitance pressure, physiological electrodes, electric stimulation work and the like;
(4) completing the preparation of strain, capacitance pressure, physiological electrode, electric stimulation work and the like;
(5) integrating devices of different functional modules on an elastic substrate, and screen-printing a carbon paste lead to lead out signals of the sensing and electrical stimulation functional modules;
(6) experiments prove that the polymer man-machine interface is applied to bidirectional man-machine interaction and provides a bidirectional information interaction channel for a human and a robot.
CN201910945975.4A 2019-10-01 2019-10-01 Full-flexible polymer interface for bidirectional human-computer interaction application Pending CN110638448A (en)

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