CN203425376U - Brain electricity physiotherapy instrument based on constant current source control - Google Patents

Abstract

The utility model discloses an electroencephalogram physiotherapy apparatus based on constant current source control, which comprises a dual-path pulse signal generating circuit, a first and a second pulse signal amplifying circuit, a pulse signal phase adjustment circuit and first and second output electrodes; The dual pulse signal generating circuit outputs two independent pulse signals, the first pulse signal is amplified by the first pulse signal amplifying circuit and then sent to the first output electrode, and the second pulse signal is amplified by the second pulse signal amplifying circuit After the voltage is amplified, it is sent to the second output electrode through the pulse signal phase adjustment circuit. The pulse signal phase adjustment circuit uses the human body impedance connected between the first and second output electrodes as a feedback link to adjust the phase of the second pulse signal. The first and second output electrodes output a constant current to the human body. The utility model improves the controllability of the output microcurrent of the electroencephalographic physiotherapy instrument, and can provide the constant current control microcurrent meeting the specific requirements of the electrophysiological electrophysiology of the brain.

Description

An EEG Physiotherapy Apparatus Based on Constant Current Source Control

technical field

The utility model relates to an electroencephalogram physiotherapy instrument, in particular to an electroencephalogram physiotherapy instrument based on constant current source control.

Background technique

Human tissue cells are always producing very weak physiological electricity spontaneously and continuously. Human physiological electricity controls and regulates human consciousness, thinking and all physiological and psychological activities. When human physiological electricity is abnormal, human physiological and psychological activities must be will be damaged. For the brain, when the brain's physiological electricity is in disorder, it will lead to symptoms such as insomnia, anxiety, and depression. The EEG physiotherapy instrument is currently an effective physiotherapy instrument for brain physiological electrical conditioning.

Most of the micro-current generating circuits of EEG physiotherapy instruments in the prior art adopt constant voltage control, but the impedance of the human body is different. If the micro-current generating circuit controlled by constant voltage is used, when the impedance of the human body is large, the The micro-current generated by the type circuit is almost zero. The EEG physiotherapy device realizes the physiotherapy function through the physiological effect of the electric current. If the current is close to zero, the corresponding physiotherapy effect will be lost. Therefore, there is an urgent need for an EEG physiotherapy instrument that can solve the problem of uncontrollable physiotherapy effects caused by microcurrent instability caused by differences in human body impedance, and that meets the specific requirements of brain physioelectric physiotherapy.

Utility model content

The purpose of the utility model is to provide an EEG physiotherapy instrument based on constant current source control with high output current controllability.

The purpose of this utility model is achieved through the following technical measures:

An EEG physiotherapy apparatus based on constant current source control, characterized in that: the EEG physiotherapy apparatus includes a two-way pulse signal generating circuit, a first pulse signal amplifying circuit, a second pulse signal amplifying circuit, and a pulse signal phase adjustment circuit circuit and the first and second output electrodes; the two-way pulse signal generating circuit outputs two independent pulse signals, the first pulse signal is amplified by the first pulse signal amplifying circuit and then sent to the first output electrode, the second The two-way pulse signal is amplified by the second pulse signal amplifying circuit and then transmitted to the second output electrode through the pulse signal phase adjustment circuit, and the pulse signal phase adjustment circuit is connected between the first and second output electrodes. The human body impedance acts as a feedback link to adjust the phase of the second pulse signal so that the first and second output electrodes output a constant current to the human body.

As a preferred embodiment of the present utility model, the first and second pulse signals are unipolar pulse signals with a duty cycle of 50% and periods of 2.0s and 2.5s respectively; the first and second The pulse signal amplifying circuit amplifies the first and second pulse signals into bipolar pulse signals of -8V and +8V.

As an embodiment of the present utility model, the EEG physiotherapy apparatus also includes a current control button for manually adjusting the current value of the constant current; the current control button is connected to the pulse signal phase adjustment circuit. Control terminal.

As an embodiment of the present utility model, the EEG physiotherapy apparatus also includes a working mode selection button circuit for manually selecting the working mode of the EEG physiotherapy apparatus and a duration for manually selecting the working duration of the EEG physiotherapy apparatus A button circuit, the output terminals of the working mode selection button circuit and the duration button circuit are respectively connected to the corresponding ports of the two-way pulse signal generating circuit.

As an embodiment of the present invention, the EEG physiotherapy apparatus further includes a display circuit for displaying the working status of the EEG physiotherapy apparatus; the display circuit is connected to the corresponding interface of the two-way pulse signal generating circuit.

Compared with the prior art, the utility model has the following beneficial effects:

The pulse signal phase adjustment circuit of the utility model uses the human body impedance connected between the first and second output electrodes as a feedback link to adjust the phase of the second pulse signal so that the first and second output electrodes output a constant output to the human body. Current solves the problem of uncontrollable physiotherapy effect caused by unstable micro-current caused by differences in human body impedance in the prior art. Therefore, the utility model improves the controllability of the output micro-current of the EEG physiotherapy instrument, It can provide constant current control micro-current that meets the specific requirements of brain physioelectric therapy.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Fig. 1 is the circuit principle block diagram of the EEG physiotherapy instrument based on the constant current source control of the utility model;

Fig. 2 is the power supply circuit of the electroencephalogram physiotherapy instrument of the present utility model;

Fig. 3 is one of the voltage conversion circuit of the electroencephalogram physiotherapy instrument of the present utility model;

Fig. 4 is the second of the voltage conversion circuit of the electroencephalogram physiotherapy instrument of the present utility model;

Fig. 5 is the voltage conversion circuit three and the liquid crystal backlight circuit of the electroencephalogram physiotherapy instrument of the present utility model;

Fig. 6 is the operating mode selection button circuit of the EEG physiotherapy instrument of the present utility model;

Fig. 7 is the duration button circuit of the EEG physiotherapy instrument of the present utility model;

Fig. 8 is the two-way pulse signal generating circuit of the EEG physiotherapy apparatus of the present utility model;

Fig. 9 is the first pulse signal amplifying circuit and the first and second output electrodes of the EEG physiotherapy apparatus of the present invention;

Fig. 10 is the second pulse signal amplifying circuit of the electroencephalogram physiotherapy apparatus of the present utility model;

Fig. 11 is the pulse signal phase adjustment circuit of the EEG physiotherapy apparatus of the present utility model;

Fig. 12 is a display circuit of the EEG physiotherapy apparatus of the present invention.

Detailed ways

As shown in Figure 1, the EEG physiotherapy instrument based on constant current source control of the present invention includes a dual pulse signal generating circuit, a first pulse signal amplifying circuit, a second pulse signal amplifying circuit, a pulse signal phase adjustment circuit, a first , the second output electrodes JK1 and JK2, the current control buttons KU and KD used to manually adjust the current value of the constant current, the working mode selection button circuit used to manually select the working mode of the EEG physiotherapy instrument, used to manually select the EEG The duration button circuit for the working duration of the physiotherapy apparatus, and the display circuit for displaying the working state of the electroencephalogram physiotherapy apparatus. Among them, the dual-channel pulse signal generating circuit outputs two independent pulse signals, which are unipolar pulse signals with a duty cycle of 50% and periods of 2.0s and 2.5s respectively. The first pulse signal consists of the first pulse The signal amplifying circuit amplifies the voltage to become a bipolar pulse signal of -8V and +8V, and then sends it to the first output electrode JK1, and the second pulse signal is also amplified by the second pulse signal amplifying circuit to become -8V and +8V The bipolar pulse signal is then transmitted to the second output electrode JK2 through the pulse signal phase adjustment circuit, and the pulse signal phase adjustment circuit uses the human body impedance connected between the first and second output electrodes JK1 and JK2 as a feedback link to The phase adjustment of the second pulse signal makes the first and second output electrodes JK1 and JK2 output a constant current to the human body; the current control buttons KU and KD are connected to the control terminal of the pulse signal phase adjustment circuit, and the working mode selection button circuit and continuous The output ends of the time button circuit are respectively connected to the corresponding ports of the dual pulse signal generating circuit, and the display circuit is connected to the corresponding interface of the dual pulse signal generating circuit.

As shown in Figure 2 to Figure 5, the power supply circuit of the present invention is powered by the battery, and through the voltage conversion circuit composed of the LMC7660 chip and the HT7130A-1 chip respectively, it provides +8V for the EEG physiotherapy instrument of the present invention. , -8V, +9V, +3V and +3VB working voltage. Wherein, the circuit shown in FIG. 5 also comprises a liquid crystal backlight circuit composed of an LED and a triode Q2, so as to provide a backlight for the LCD display screen in the above-mentioned display circuit.

As shown in Figure 8, the dual-channel pulse signal generation circuit of the present invention is composed of a single-chip microcomputer U1 and its peripheral circuit of the model PIC16F716, which is used to generate the above-mentioned first and second pulse signals and has a built-in EEG physiotherapy instrument work control software.

As shown in Figure 6 and Figure 7, the working mode selection button circuit of the present utility model is composed of the working mode selection button Mode and the corresponding button peripheral circuit, and the duration button circuit is composed of the duration button Time and the corresponding button peripheral circuit. The output terminals of the mode selection button circuit and the duration button circuit are respectively connected to the U1-17 port and the U1-11 port of the single-chip microcomputer U1.

As shown in Figure 9, the first pulse signal amplifying circuit of the present utility model is made up of resistance R11, R15, R14 and operational amplifier U5B, and its input end is connected to the U1-8 port of single-chip microcomputer U1, and output end is connected to the first output electrode JK1.

Fig. 10 has shown the second pulse signal amplifying circuit of the present invention, and Fig. 11 has shown the pulse signal phase adjustment circuit of the present invention, and the pulse signal phase adjustment circuit is made up of the digital potentiometer chip U8～U10 of model X9511W and its Composed of peripheral circuits, the input end of the second pulse signal amplifying circuit is connected to the U1-9 port of the single-chip microcomputer U1, and the output end is connected to the second output electrode JK2 through the pulse signal phase adjustment circuit.

As shown in Figure 12, the display circuit of the present invention includes an LCD display screen and a display drive circuit composed of HT1621B.

Briefly describe the working principle of the EEG physiotherapy instrument based on the constant current source control of the present invention below:

When utilizing the EEG physiotherapy apparatus of the present utility model to perform physical therapy on a patient, firstly, the first and second output electrodes JK1 and JK2 are connected to suitable parts of the human body; secondly, use the working mode selection button Mode to select a suitable working mode for the patient , and use the duration button Time to select the appropriate duration of physical therapy for the patient; then, the EEG physiotherapy device starts to work, and its working process includes: the single-chip microcomputer U1 enters the specified working state, RB2 and RB3 ports send out two-way pulse signals, RB2 port The pulse sent out is directly input to the TL062CD chip for amplification, and then output to the electrode JK1 after amplification. The pulse sent by the RB3 port is first amplified by the TL061C chip, and then the phase adjustment circuit is made by the single-channel pulse signal phase adjustment circuit composed of the digital potentiometer chip X9511W. The current adjustment value is set by the digital potentiometer chip X9511W through the buttons KU and KD, and the feedback link is formed by the human body impedance at both ends of the electrodes JK1 and JK2 to realize constant current control.

The utility model is not limited to the above-mentioned specific embodiments. According to the above content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical ideas of the utility model, the utility model can also be made into other various forms. The equivalent modifications, replacements or alterations all fall within the protection scope of the present utility model.

Claims (5)

1. a brain electricity physiotherapy table of controlling based on constant-current source, is characterized in that: described brain electricity physiotherapy table comprises two-way pulse signal generation circuit, the first pulse signal amplification circuit, the second pulse signal amplification circuit, pulse signal phase regulating circuit and first, second output electrode (JK1 and JK2), described two-way pulse signal generation circuit output two-way is pulse signal independently, first via pulse signal is undertaken being defeated by the first output electrode (JK1) after voltage amplification by the first pulse signal amplification circuit, the second road pulse signal is undertaken by described pulse signal phase regulating circuit, being defeated by the second output electrode (JK2) after voltage amplification by the second pulse signal amplification circuit, described pulse signal phase regulating circuit is to be connected to first, human body impedance between the second output electrode (JK1 and JK2) is as feedback element, described the second road pulse signal is carried out to phase adjusted, make described first, the second output electrode (JK1 and JK2) is to human body output constant current.

2. the brain electricity physiotherapy table of controlling based on constant-current source according to claim 1, is characterized in that: described first, second road pulse signal is that dutycycle is 50%, and the cycle is respectively the unipolar pulse signal of 2.0s and 2.5s; Described first, second pulse signal amplification circuit by zoom into-8V of first, second road pulse signal and+double polarity pulse signal of 8V.

3. the brain electricity physiotherapy table of controlling based on constant-current source according to claim 1 and 2, is characterized in that: described brain electricity physiotherapy table also comprises the Current Control button (KU and KD) for the current value size of constant current described in manual adjustment; This Current Control button (KU and KD) is connected to the control end of described pulse signal phase regulating circuit.

4. the brain electricity physiotherapy table of controlling based on constant-current source according to claim 3, it is characterized in that: described brain electricity physiotherapy table also comprises that the outfan of described mode of operation selection key circuit and persistent period key circuit is connected respectively to the corresponding port of described two-way pulse signal generation circuit for the mode of operation selection key circuit of artificial selection's brain electricity physiotherapy table mode of operation with for the persistent period key circuit of artificial selection's brain electricity physiotherapy table run duration.

5. the brain electricity physiotherapy table of controlling based on constant-current source according to claim 4, is characterized in that: described brain electricity physiotherapy table also comprises for showing the display circuit of brain electricity physiotherapy table duty; Described display circuit is connected to the corresponding interface of two-way pulse signal generation circuit.

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