CN110882467A - Sleeping instrument - Google Patents
Sleeping instrument Download PDFInfo
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- CN110882467A CN110882467A CN201911335826.2A CN201911335826A CN110882467A CN 110882467 A CN110882467 A CN 110882467A CN 201911335826 A CN201911335826 A CN 201911335826A CN 110882467 A CN110882467 A CN 110882467A
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- linear optical
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M21/02—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis for inducing sleep or relaxation, e.g. by direct nerve stimulation, hypnosis, analgesia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/004—Magnetotherapy specially adapted for a specific therapy
- A61N2/006—Magnetotherapy specially adapted for a specific therapy for magnetic stimulation of nerve tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
- A61M2021/0055—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus with electric or electro-magnetic fields
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M21/00—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
- A61M2021/0005—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus
- A61M2021/0083—Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis by the use of a particular sense, or stimulus especially for waking up
Abstract
The invention provides a sleep instrument, which comprises a host, a magnetic coil and an electroencephalogram signal acquisition system, wherein the electroencephalogram signal acquisition system comprises an electroencephalogram signal acquisition device, a differential amplification circuit, a trap circuit, a voltage processing circuit and a linear optical coupling circuit; the electroencephalogram signal acquisition device senses human brain waves and outputs an electric signal; the differential amplification circuit is electrically connected with the electroencephalogram signal acquisition device, the trap circuit is electrically connected with the differential amplification circuit, the voltage processing circuit is electrically connected with the trap circuit, the linear optical coupling circuit is electrically connected with the voltage processing circuit, the linear optical coupling circuit is electrically connected with the host machine, so that the host machine receives an electric signal transmitted by the linear optical coupling circuit and transmits the electric signal to the magnetic coil, the magnetic coil generates a time-varying magnetic field, the magnetic field is coupled to a brain sleep center of a patient with sleep disorder, the sleep process of the patient is conveniently adjusted and induced, and the function of promoting sleep or awakening is achieved.
Description
Technical Field
The invention relates to the field of health care instruments, in particular to a sleep instrument.
Background
When sleep disorder occurs, the electrical brain activity of a certain stage of the sleep process and even the whole sleep process is abnormal. The first manifestation of sleep disorder is that it is difficult to fall asleep (i.e., insomnia), and the time from waking to falling asleep is long, in which the tendency of brain wave frequency to gradually become lower is slow and inconspicuous, and is accompanied by unstable frequency jumps. The second manifestation of sleep disturbance is poor sleep quality, easy waking up and dreaminess, and patients feel as asleep or not asleep, awake or not awake, dizziness, absentmindedness.
The magnetic field hypnotic instrument in the market at present mostly generates a certain waveform of brain waves with a frequency close to the brain waves, or generates a time-varying magnetic field with a corresponding waveform by brain waves stored in a memory in advance, and realizes sleep promotion according to an ideal sleep promotion step on the assumption that a given magnetic field can generate a set influence on the brain waves of a patient. Therefore, the difference of different patients is ignored, and the difference of the responses of the patients to the magnetic field at different time is also ignored, so that the ideal treatment effect cannot be achieved.
Disclosure of Invention
The invention mainly aims to provide a sleep instrument, which solves the problem that the ideal treatment effect cannot be achieved due to the difference of different patients and the fact that the different responses of the patients to the magnetic field at different time are ignored.
In order to achieve the above object, the present invention provides a sleep apparatus, comprising:
a host;
a magnetic coil electrically connected to the host;
brain electrical signal collection system, brain electrical signal collection system includes:
the electroencephalogram signal acquisition device is used for sensing human brain waves and outputting an electric signal;
the differential amplification circuit is electrically connected with the electroencephalogram signal acquisition device and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device and carrying out differential amplification processing;
the trap circuit is electrically connected to the differential amplification circuit and is used for receiving the electric signal processed by the differential amplification circuit and filtering the electric signal;
the voltage processing circuit is electrically connected to the trap circuit and is used for receiving the electric signal filtered by the trap circuit and amplifying and lifting the voltage of the filtered electric signal;
the linear optical coupling circuit is electrically connected to the voltage processing circuit and used for receiving the electric signal processed by the voltage processing circuit and carrying out voltage isolation on the electric signal processed by the voltage processing circuit;
the linear optical coupling circuit is electrically connected with the host machine, so that the host machine receives the electric signal transmitted by the linear optical coupling circuit and transmits the electric signal to the magnetic coil.
Further, the differential amplification circuit comprises a parallel double-operational amplifier circuit, a resistance-capacitance coupling circuit, a common-mode signal sampling driving circuit and a post-amplifier circuit which are sequentially connected in an electric signal manner, wherein the resistance-capacitance coupling circuit is connected with the common-mode signal sampling driving circuit in parallel.
Further, the differential amplification circuit comprises a floating ground tracking circuit, and the floating ground tracking circuit is electrically connected with the post-stage amplifier circuit.
Further, the trap circuit comprises a high-pass filter circuit and a low-pass filter circuit which are connected in sequence through electric signals.
Furthermore, the voltage processing circuit comprises a voltage amplifying circuit and a level lifting circuit which are sequentially connected by electric signals.
Further, the linear optical coupling circuit comprises a linear optical coupler, a first amplifier and a second amplifier, the linear optical coupler is arranged between the output end of the first amplifier and the input end of the second amplifier, the input end of the first amplifier is electrically connected with the voltage processing circuit, and the output end of the second amplifier is electrically connected with the electroencephalogram signal storage device.
Furthermore, the sleep apparatus further comprises a buffer, and the buffer is arranged between the electroencephalogram signal acquisition device and the differential amplification circuit.
Furthermore, the sleep meter further comprises an analog-to-digital converter, wherein the analog-to-digital converter is arranged on the voltage processing circuit and the linear optical coupling circuit and is used for performing analog-to-digital conversion on the electric signal processed by the voltage processing circuit and outputting the electric signal to the linear optical coupling circuit.
Furthermore, the sleep apparatus further comprises a floating power supply, and the floating power supply is electrically connected with the differential amplification circuit, the trap circuit, the voltage processing circuit and the linear optical coupling circuit respectively.
Further, a digital-to-analog converter is arranged in the host, and the digital-to-analog converter is used for converting the electric signal transmitted from the linear optical coupling circuit into an analog signal and transmitting the analog signal to the magnetic coil.
The invention provides a sleep instrument, which comprises a host, a magnetic coil and an electroencephalogram signal acquisition system, wherein the electroencephalogram signal acquisition system comprises an electroencephalogram signal acquisition device, a differential amplification circuit, a trap circuit, a voltage processing circuit and a linear optical coupling circuit; the electroencephalogram signal acquisition device is used for sensing human brain waves and outputting an electric signal; the differential amplification circuit is electrically connected with the electroencephalogram signal acquisition device and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device and carrying out differential amplification processing; the trap circuit is electrically connected to the differential amplification circuit and is used for receiving the electric signal processed by the differential amplification circuit and carrying out filtering processing; the voltage processing circuit is electrically connected to the trap circuit and is used for receiving the electric signal filtered by the trap circuit and amplifying and lifting the voltage of the filtered electric signal; the linear optical coupling circuit is electrically connected with the voltage processing circuit and used for receiving the electric signal processed by the voltage processing circuit and isolating the voltage of the electric signal processed by the voltage processing circuit, and the linear optical coupling circuit is electrically connected with the host machine so that the host machine receives the electric signal transmitted by the linear optical coupling circuit and transmits the electric signal to the magnetic coil, the magnetic coil generates a time-varying magnetic field and couples the magnetic field to a brain sleep center of a patient with sleep disorder, the sleep process of the patient is conveniently adjusted and induced, and the function of promoting sleep or awakening is realized.
Drawings
In order to more clearly illustrate the embodiments or exemplary technical solutions of the present invention, the drawings used in the embodiments or exemplary descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a sleep apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of an electroencephalogram signal acquisition device according to an embodiment of the present invention;
FIG. 3 is a circuit diagram of a differential amplifier circuit according to an embodiment of the present invention;
FIG. 4 is a circuit schematic of a trap circuit according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of a voltage processing circuit according to an embodiment of the present invention;
FIG. 6 is a circuit diagram of a linear optocoupler circuit according to an embodiment of the invention. The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
As shown in fig. 1 to 6, the present invention provides a sleep apparatus.
In one embodiment, as shown in fig. 1-2, the sleep apparatus includes a host 1, a magnetic coil 2 and an electroencephalogram signal acquisition system 3, wherein the electroencephalogram signal acquisition system 3 includes an electroencephalogram signal acquisition device 100, a differential amplification circuit 200, a trap circuit 300, a voltage processing circuit 400 and a linear optical coupling circuit 500; the electroencephalogram signal acquisition device 100, the differential amplification circuit 200, the notch circuit 300, the voltage processing circuit 400 and the linear optical coupling circuit 500 are sequentially connected, and the connections are electrically connected to realize mutual transmission of electrical signals. That is, the electrical signal collected by the electroencephalogram signal collecting device 100 is processed by the differential amplifying circuit 200, the notch circuit 300, the voltage processing circuit 400, and the linear optical coupling circuit 500 in sequence for subsequent use.
Specifically, the electroencephalogram signal acquisition device 100 is an electroencephalogram sensor, and is configured to sense a human brain wave and output an electrical signal, where the human brain wave is an electroencephalogram signal of a sleep disorder patient; the differential amplification circuit 200 is electrically connected to the electroencephalogram signal acquisition device 100, and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device 100 and performing differential amplification processing; the notch circuit 300 is electrically connected to the differential amplifier circuit 200, and is configured to receive the electrical signal processed by the differential amplifier circuit 200 and perform filtering processing; the voltage processing circuit 400 is electrically connected to the notch circuit 300, and is configured to receive the electrical signal filtered by the notch circuit 300, and amplify and raise a voltage of the filtered electrical signal; the linear photo-coupling circuit 500 is electrically connected to the voltage processing circuit 400, and is configured to receive the electrical signal processed by the voltage processing circuit 400 and perform voltage isolation on the electrical signal processed by the voltage processing circuit 400.
Further, the linear optical coupling circuit 500 is electrically connected to the host 1, so that the host 1 receives the electrical signal transmitted by the linear optical coupling circuit 500 and transmits the electrical signal to the magnetic coil 2, and the magnetic coil 2 generates a time-varying magnetic field and couples the magnetic field to a brain sleep center of a patient with sleep disorder, thereby facilitating adjustment and induction of the sleep process of the patient and realizing sleep promotion or awakening functions.
Further, the main machine 1 and the magnetic coil 2 are of a separated structure, and when the magnetic coil 2 is used, the magnetic coil 2 is placed under a pillow of a sleep-disordered patient, so that the sleep-disordered patient is prevented from directly contacting with the magnetic coil 2, and potential safety hazards are caused; namely, the magnetic coil 2 converts the time-varying magnetic field into a time-varying magnetic field, and couples (in a non-contact way) the time-varying magnetic field to the brain sleep center of the patient with sleep disorder, so as to realize the functions of guiding falling asleep and realizing timed awakening, thereby achieving the purposes of treating insomnia and improving sleep quality.
Further, the sleep apparatus further includes a buffer 600, the buffer 600 is disposed between the electroencephalogram signal acquisition device 100 and the differential amplification circuit 200, and is used for delaying the electrical signal acquired by the electroencephalogram signal acquisition device 100, because the electroencephalogram signal acquisition device 100 sends the acquired electrical signal to the differential amplification circuit 200, the acquired electrical signal needs to be fed back first, that is, the integrity of the electrical signal is ensured, the buffer 600 is disposed between the electroencephalogram signal acquisition device 100 and the differential amplification circuit 200, so that the electroencephalogram signal acquisition device 100 provides feedback time.
Further, the sleep meter further includes an analog-to-digital converter 700, where the analog-to-digital converter 700 is disposed in the voltage processing circuit 400 and the linear optical coupling circuit 500, and is configured to perform analog-to-digital conversion on the electrical signal processed by the voltage processing circuit 400 and output the electrical signal to the linear optical coupling circuit 500. Since the electrical signal acquired by the electroencephalogram signal acquisition device 100 is an analog signal, that is, the digital-to-analog converter 700 converts the analog signal into a digital signal, that is, the analog signal processed by the voltage processing circuit 400 is converted into a digital signal and is output to the linear optical coupling circuit 500.
Further, in order to keep the sleep apparatus working normally, the sleep apparatus further includes a floating power supply 800, and the floating power supply 800 is electrically connected to the differential amplification circuit 200, the notch circuit 300, the voltage processing circuit 400, and the linear photo-coupling circuit 500, respectively, that is, the floating power supply 800 is configured to provide a voltage for the differential amplification circuit 200, the notch circuit 300, the voltage processing circuit 400, and the linear photo-coupling circuit 500 to work normally, so that the differential amplification circuit 200, the notch circuit 300, the voltage processing circuit 400, and the linear photo-coupling circuit 500 work normally.
Further, a battery is arranged in the electroencephalogram signal acquisition device 100 to provide working voltage for the electroencephalogram signal acquisition device 100, and the normal work of the electroencephalogram signal acquisition device 100 is ensured.
Further, a digital-to-analog converter (not shown) is provided in the host 1, and the digital-to-analog converter is configured to convert the electrical signal transmitted from the linear optical coupling circuit 500 into an analog signal and transmit the analog signal to the magnetic coil 2.
In the embodiment of the invention, the sleep apparatus comprises a host 1, a magnetic coil 2 and an electroencephalogram signal acquisition system 3, wherein the electroencephalogram signal acquisition system 3 comprises an electroencephalogram signal acquisition device 100, a differential amplification circuit 200, a notch circuit 300, a voltage processing circuit 400 and a linear optical coupling circuit 500; the electroencephalogram signal acquisition device 100 is used for sensing human brain waves and outputting an electric signal; the differential amplification circuit 200 is electrically connected to the electroencephalogram signal acquisition device 100, and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device 100 and performing differential amplification processing; the notch circuit 300 is electrically connected to the differential amplifier circuit 200, and is configured to receive the electrical signal processed by the differential amplifier circuit 200 and perform filtering processing; the voltage processing circuit 400 is electrically connected to the notch circuit 300, and is configured to receive the electrical signal filtered by the notch circuit 300, and amplify and raise a voltage of the filtered electrical signal; the linear optical coupling circuit 500 is electrically connected to the voltage processing circuit 400, and is configured to receive the electrical signal processed by the voltage processing circuit 400, and perform voltage isolation on the electrical signal processed by the voltage processing circuit 400, and the linear optical coupling circuit 500 is electrically connected to the host 1, so that the host 1 receives the electrical signal transmitted by the linear optical coupling circuit 500 and transmits the electrical signal to the magnetic coil 2, so that the magnetic coil 2 generates a time-varying magnetic field, and couples the magnetic field to a brain sleep center of a patient with sleep disorder, thereby facilitating adjustment and induction of a sleep process of the patient, and achieving a sleep-promoting or waking function.
Further, as shown in fig. 3, the differential amplifier circuit 200 includes a parallel dual-operational amplifier circuit, a resistance-capacitance coupling circuit, a common-mode signal sampling driving circuit, and a post-amplifier circuit, which are sequentially connected in an electrical signal manner, wherein the resistance-capacitance coupling circuit is connected in parallel with the common-mode signal sampling driving circuit.
Specifically, the parallel-type dual-operational amplifier circuit comprises an amplifier U1, an amplifier U2, a resistor R1, a resistor R2 and a resistor R3; the amplifier U1 has five pins, the amplifier U2 has three pins, pin 1 of the amplifier U1 and pin 1 of the amplifier U2 are input ends of electroencephalogram signals V1 and V2 acquired by the electroencephalogram signal acquisition device 100, the resistor R1 is arranged between pin 2 of the amplifier U1 and pin 2 of the amplifier U2, one end of the resistor R2 is arranged between pin 2 of the amplifier U1 and the resistor R1, the other end of the resistor R2 is connected with pin 3 of the amplifier U1, one end of the resistor R3 is arranged between pin 2 of the amplifier U2 and the resistor R1, the other end of the resistor R3 is connected with pin 3 of the amplifier U2, and pin 4 and pin 5 of the amplifier U1 are respectively connected with a power supply and a ground. In this embodiment, when the amplifier U1HE and the amplifier U2 are in an ideal state, the input impedance of the parallel dual-operational amplifier circuit is infinite, so that the common-mode rejection ratio thereof is also infinite, and the common-mode rejection ratio thereof is irrelevant to the matching degree of the peripheral resistor, so that the parallel dual-operational amplifier circuit has the functions of improving the input impedance and providing voltage buffering.
Specifically, the resistance-capacitance coupling circuit is used for isolating polarized direct-current signals, so that gain of a post-stage instrument amplifier is improved, and conditions are created for improving the common-mode rejection ratio of the circuit. The resistance-capacitance coupling circuit comprises a capacitor C1, a capacitor C2, a resistor R4 and a resistor R5, one end of the capacitor C1 is connected with a pin 3 of an amplifier U1, the other end of the capacitor C1 is connected with one end of a resistor R4, one end of the capacitor C2 is connected with the pin 3 of the amplifier U2, the other end of the capacitor C2 is connected with one end of a resistor R5, and the other end of the resistor R4 is connected with the other end of a resistor R5.
Specifically, because the output impedance of the parallel dual operational amplifier circuit is very low, that is, the common mode driving technique adopted by the common mode signal sampling driving circuit in this embodiment avoids the occurrence of the situation that the common mode interference is converted into the differential mode interference due to the asymmetry of the parameters of the resistance and capacitance elements in the resistance-capacitance coupling circuit. The common-mode signal sampling driving circuit comprises a resistor R6, a resistor R7 and an amplifier U3, wherein the amplifier U3 is provided with five pins, the resistor R6 is connected with the resistor R7 in series, two ends of the resistor R6 which is connected with the resistor R7 in series are respectively connected to a pin 3 of the amplifier U1 and a pin 3 of the amplifier U2, a pin 2 of the amplifier U3 is connected between the resistor R6 and the resistor R7, and a pin 1 and a pin 3 of the amplifier U3 are connected between the resistor R4 and the resistor R5 after being connected together.
Specifically, the post-amplifier circuit comprises an amplifier U4, the amplifier U4 has eight pins, wherein pin 1 and pin 2 of the amplifier U4 are connected to pin 3 of the amplifier U1 and pin 3 of the amplifier U2, respectively, so as to convert the amplifier U1 and the amplifier U2 double-ended differential output signals into common single-ended output signals, pin 8 of the amplifier U4 is an output terminal, pin 6 and pin 7 of the amplifier U4 are connected to the positive and negative electrodes of a power supply, respectively, and pin 5 of the amplifier U4 is grounded. The pin 3 and the pin 4 of the amplifier U4 are respectively connected to two ends of the resistor R8, and the resistor R9 and the resistor R10 are connected in series and then connected in parallel with the resistor R8, that is, a higher gain can be obtained by changing the resistance of the R8, so that a higher common mode rejection ratio is obtained.
Specifically, the differential amplification circuit comprises a floating ground tracking circuit, and the floating ground tracking circuit is electrically connected with the post-stage amplifier circuit. The floating ground tracking circuit comprises an amplifier U5 and a resistor R11, wherein the amplifier U5 is provided with three pins, the pin 1 of the amplifier U5 is connected between the resistor R9 and the resistor R10, the pin 2 and the pin 3 of the amplifier U5 are connected together and then connected with one end of the resistor R11, and the other end of the resistor R11 is grounded. That is, one end of the R11 is connected with the common end of the positive and negative power supplies of the front end part, so that the power supplies are floated, for example: the amplifier U5 has ideal characteristics, so that the fluctuation range of the positive and negative power supply voltages is completely the same as the magnitude of the common-mode input voltage, therefore, even if the parameters of the amplifier U1 and the amplifier U2 are not completely symmetrical, the effective common-mode voltage is reduced, the error voltage formed by converting into differential is very small, and the common-mode rejection capability of the differential amplifying circuit 200 is improved.
Further, the electroencephalogram signal in this embodiment is a relatively weak human physiological electrical signal, that is, the differential amplifier circuit 200 may also be used to measure other human physiological electrical signals or other weak signals, which is not limited herein.
Furthermore, the electroencephalogram of the human body is acquired, namely the grounding signal V3 of the electroencephalogram acquisition device 100 is connected to the pin 3 of the amplifier U3, and the grounding signal of the electroencephalogram acquisition device 100 and the pin 3 of the amplifier U3 are provided with a resistor R to shield the grounding signal, so that the acquired electroencephalogram is more accurate.
Further, as shown in fig. 4, the notch circuit 300 includes a high pass filter circuit and a low pass filter circuit electrically connected in sequence. The high-pass filter circuit is composed of a capacitor C3 and a resistor R12, voltage output by a pin 8 of an amplifier U5 is input into the high-pass filter circuit for primary filtering, and the cutoff frequency of the high-pass filter circuit is 0.08 Hz. The low-pass filter circuit is composed of a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R13, a resistor R14, a resistor R15, a resistor R16, an amplifier U6 and an amplifier U7, the high-pass filter circuit inputs the voltage subjected to primary filtering to the low-pass filter circuit and performs secondary filtering through the low-pass filter circuit, and the cut-off frequency of the low-pass filter circuit is 60 Hz.
Further, the capacitor C4, the capacitor C5, the capacitor C6, the capacitor C7, the resistor R13, the resistor R14, the resistor R15, the resistor R16, the amplifier U6, and the amplifier U7 form a fourth-order low-pass filter.
Further, the electroencephalogram signal input after being processed by the foregoing series of circuits is still at an mv level, and since the ADC input voltage range used by the subsequent circuit is 0 to 2.5V, the electroencephalogram signal needs further voltage amplification and level elevation before being sent to the ADC, that is, the voltage processing circuit 400 described in this embodiment includes a voltage amplification circuit and a level elevation circuit which are sequentially connected by electrical signals. As shown in fig. 5, the voltage amplifying circuit includes an amplifier U8, an amplifier U9, a resistor R17, and a variable resistor R18; the resistor R17 and the variable resistor R18 are connected in series and then connected with a pin 3 of the amplifier U8, a pin 2 of the amplifier U8 is connected between the resistor R17 and the variable resistor R18, a sliding end of the variable resistor R18 is connected with a pin 2 of the amplifier U8, a pin 1 of the amplifier U8 is connected with an output end of the low-pass filter circuit, a pin 1 of the amplifier U9 is connected with a pin 3 of the amplifier U8, the pin 2 and the pin 3 of the amplifier U9 are connected in common, and the pin 3 of the amplifier U9 is an output end of the voltage amplifying circuit 400. Optionally, the level boost circuit includes a resistor R19 and a resistor R20, one end of the resistor R19 is connected to one end of the resistor R20 and then connected between the pin 1 of the amplifier U9 and the pin 3 of the amplifier U8, the other end of the resistor R19 is connected to the power supply, the other end of the resistor R20 is grounded, and the resistor R19 and the resistor R20 are used to raise the level of the pin 1 of the amplifier U9, so that the voltage at the output end of the voltage amplification circuit 400 is amplified and raised.
Further, as shown in fig. 6, the linear photo-coupler circuit 500 includes a linear photo-coupler U10, a first amplifier U11 and a second amplifier U12, the linear photo-coupler U10 is disposed between the output terminal of the first amplifier U11 and the input terminal of the second amplifier U12, the input terminal Vin of the first amplifier U11 is electrically connected to the voltage processing circuit 400, and the output terminal Vout of the second amplifier U12 is electrically connected to the host.
The linear optical coupler U10 has excellent common-mode interference resistance, and can effectively block the electrical connection between the pre-amplification circuit and the post-stage data acquisition circuit without cutting off the signal transmission between the pre-amplification circuit and the post-stage data acquisition circuit. The linear optocoupler U10 is a LOCllO linear optocoupler, different from the conventional optocoupler, in that the LOC110 linear optocoupler operates in a servo mode design to compensate for the nonlinear time and temperature characteristics of the leds, and can couple ac and dc signals simultaneously. The LOCllO linear optical coupler provides another better option for replacing bulky transformers and non-linear optical couplers in electroencephalogram signal acquisition applications.
Further, the LOCll0 linear optocoupler has both photovoltaic and photoconductive modes of operation. The best linearity, lowest interference and drift performance can be achieved by using a LOCLLO linear optical coupler in a photovoltage mode.
In the embodiment of the invention, the sleep apparatus comprises a host 1, a magnetic coil 2 and an electroencephalogram signal acquisition system 3, wherein the electroencephalogram signal acquisition system 3 comprises an electroencephalogram signal acquisition device 100, a differential amplification circuit 200, a notch circuit 300, a voltage processing circuit 400 and a linear optical coupling circuit 500; the electroencephalogram signal acquisition device 100 is used for sensing human brain waves and outputting an electric signal; the differential amplification circuit 200 is electrically connected to the electroencephalogram signal acquisition device 100, and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device 100 and performing differential amplification processing; the notch circuit 300 is electrically connected to the differential amplifier circuit 200, and is configured to receive the electrical signal processed by the differential amplifier circuit 200 and perform filtering processing; the voltage processing circuit 400 is electrically connected to the notch circuit 300, and is configured to receive the electrical signal filtered by the notch circuit 300, and amplify and raise a voltage of the filtered electrical signal; the linear optical coupling circuit 500 is electrically connected to the voltage processing circuit 400, and is configured to receive the electrical signal processed by the voltage processing circuit 400, and perform voltage isolation on the electrical signal processed by the voltage processing circuit 400, and the linear optical coupling circuit 500 is electrically connected to the host 1, so that the host 1 receives the electrical signal transmitted by the linear optical coupling circuit 500 and transmits the electrical signal to the magnetic coil 2, so that the magnetic coil 2 generates a time-varying magnetic field, and couples the magnetic field to a brain sleep center of a patient with sleep disorder, thereby facilitating adjustment and induction of a sleep process of the patient, and achieving a sleep-promoting or waking function.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the specification and the drawings, or any other related technical fields directly or indirectly applied thereto under the conception of the present invention are included in the scope of the present invention.
Claims (10)
1. A sleep apparatus, characterized in that the sleep apparatus comprises:
a host;
a magnetic coil electrically connected to the host;
brain electrical signal collection system, brain electrical signal collection system includes:
the electroencephalogram signal acquisition device is used for sensing human brain waves and outputting an electric signal;
the differential amplification circuit is electrically connected with the electroencephalogram signal acquisition device and is used for receiving the electrical signal output by the electroencephalogram signal acquisition device and carrying out differential amplification processing;
the trap circuit is electrically connected to the differential amplification circuit and is used for receiving the electric signal processed by the differential amplification circuit and filtering the electric signal;
the voltage processing circuit is electrically connected to the trap circuit and is used for receiving the electric signal filtered by the trap circuit and amplifying and lifting the voltage of the filtered electric signal;
the linear optical coupling circuit is electrically connected to the voltage processing circuit and used for receiving the electric signal processed by the voltage processing circuit and carrying out voltage isolation on the electric signal processed by the voltage processing circuit;
the linear optical coupling circuit is electrically connected with the host machine, so that the host machine receives the electric signal transmitted by the linear optical coupling circuit and transmits the electric signal to the magnetic coil.
2. The sleep monitor as claimed in claim 1, wherein the differential amplifier circuit comprises a parallel dual operational amplifier circuit, a rc coupling circuit, a common mode signal sampling driving circuit and a post amplifier circuit, which are electrically connected in sequence, wherein the rc coupling circuit is connected in parallel with the common mode signal sampling driving circuit.
3. The sleep meter of claim 2 wherein the differential amplification circuit comprises a floating ground tracking circuit, the floating ground tracking circuit being electrically connected to the post-amplifier circuit.
4. The sleep meter of claim 1 wherein the trap circuit comprises a high pass filter circuit and a low pass filter circuit electrically connected in series.
5. The sleep meter according to claim 1, wherein the voltage processing circuit comprises a voltage amplifying circuit and a level raising circuit which are connected in sequence by electric signals.
6. The sleep monitor as claimed in claim 1, wherein the linear optical coupling circuit comprises a linear optical coupler, a first amplifier and a second amplifier, the linear optical coupler is disposed between the output terminal of the first amplifier and the input terminal of the second amplifier, the input terminal of the first amplifier is electrically connected to the voltage processing circuit, and the output terminal of the second amplifier is electrically connected to the electroencephalogram signal storage device.
7. The sleep meter according to claim 1, characterized in that it further comprises a buffer, which is provided between the electroencephalogram signal acquisition device and the differential amplification circuit.
8. The sleep monitor as claimed in claim 7, further comprising an analog-to-digital converter disposed between the voltage processing circuit and the linear photo-coupling circuit for performing analog-to-digital conversion on the electrical signal processed by the voltage processing circuit and outputting the electrical signal to the linear photo-coupling circuit.
9. The sleep meter according to claim 1, further comprising a floating power supply electrically connected to the differential amplifying circuit, the trap circuit, the voltage processing circuit, and the linear photo-coupling circuit, respectively.
10. The sleep meter according to claim 1, wherein a digital-to-analog converter is provided in the main body, and the digital-to-analog converter is configured to convert the electrical signal transmitted from the linear optical coupling circuit into an analog signal and transmit the analog signal into the magnetic coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335826.2A CN110882467A (en) | 2019-12-20 | 2019-12-20 | Sleeping instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335826.2A CN110882467A (en) | 2019-12-20 | 2019-12-20 | Sleeping instrument |
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| CN110882467A true CN110882467A (en) | 2020-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021215965A1 (en) * | 2020-04-21 | 2021-10-28 | Ogulnik Filipp Mihailovich | Method and devices for controlling a person's sleep |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021215965A1 (en) * | 2020-04-21 | 2021-10-28 | Ogulnik Filipp Mihailovich | Method and devices for controlling a person's sleep |
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