CN221673200U - Magnetic stimulator circuit and magnetic stimulator with same - Google Patents

Abstract

The utility model relates to a magnetic stimulator circuit and a magnetic stimulator, which comprises a control module, a sensor module and a control module, wherein the control module is used for analyzing a headrest signal, a power signal and outputting a control signal: the device is used for detecting the head on-pillow signals, including on-pillow situations, namely that the head is left, middle, right and away from the pillow, on-pillow actions, namely on-pillow frequency and amplitude, and further comprises: the microwave transmitter module is used for outputting microwave signals, the program-controlled amplifying module is used for amplifying and modulating the amplitude of the microwave signals, the energy conversion module is used for converting the microwave signals output by the program-controlled amplifying module into pulse modulation radio-frequency electromagnetic fields, and the power detection module is used for detecting power signals of different frequency points, including forward power and reverse power. Based on a flattened space arrangement principle, a lithium polymer battery and a microstrip array antenna are selected, the weight and the size of the device are reduced, and the intelligent control function of the device is realized by combining the detection of a headrest, the power detection and the recognition of a sleep-wake state, so that the user experience is improved.

Description

A magnetic stimulator circuit and a magnetic stimulator having the same

Technical Field

The utility model relates to the field of magnetic stimulator circuits and magnetic stimulators, in particular to a magnetic stimulator circuit and a magnetic stimulator with the stimulating circuit.

Background Art

Transcranial magnetic stimulation is the most commonly used neuromodulation technology. A strong pulse current is input into the coil to generate a time-varying magnetic field. This magnetic field generates an induced electric field and current in the cerebral cortex, which changes the action potential of neurons in the cerebral cortex and produces biological effects on the stimulated area and related areas. Commonly used coils include circular coils, figure-8 coils, etc. This type of coil is large and bulky, and is not suitable for use in neuromodulation instruments in home scenarios. Although there are some home versions of magnetic stimulators on the market, stimulation time must be reserved each time it is used, generally 1 or 2 times a day, 30 to 45 minutes each time, and a heavier treatment cap (containing a small coil) must be worn during the stimulation process, and different gears, modes, time and other parameters must be selected, so the user experience is poor.

Chinese patent publication number CN215960457U relates to a transcranial magnetic stimulator, which includes: a host, a wearable device electrically connected to the host; wherein the host and the wearable device are separately arranged, and the host is connected to the wearable device through a corresponding connecting line; the wearable device is suitable for being worn on the human head, that is, the host is suitable for driving the wearable device to stimulate the human head and emit a magnetic field, or the host is suitable for driving the wearable device to emit a low-frequency current to the human ear; the utility model drives the wearable device to stimulate the human head and emit a magnetic field or emits a low-frequency current to the human ear through the host, and can apply different magnetic field strengths and stimulation sites to the human head, thereby achieving good results, and at the same time, by emitting a low-frequency current to the human ear to generate a square wave with an adjustable period and voltage amplitude, and the stimulation treatment is performed through waveform control. Although the device generates square waves through a low-frequency circuit, it cannot be used lightly due to the large overall size of the device, and the steps are cumbersome and inconvenient to use.

Utility Model Content

The technical problem to be solved by the utility model is that the home version of the magnetic stimulator needs to reserve stimulation time each time it is used, generally 1 or 2 times a day, each time for 30 to 45 minutes, and a heavy treatment cap (containing a small coil) needs to be worn during the stimulation process, and different gears, modes, time and other parameters need to be selected, so the user experience is poor. In view of the above defects of the prior art, a magnetic stimulator circuit and a magnetic stimulator having the stimulation circuit are provided.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

Constructing a magnetic stimulator circuit, including a control module, the control module is used to analyze a head-on-pillow signal, a power signal and an output control signal;

Sensor module: The sensor module is used to detect the head on pillow signal, including the pillow condition and/or pillow movement. The sensor module is connected to the control module and also includes:

A microwave transmitter module, which outputs a microwave signal and is connected to a program-controlled amplifier module;

A program-controlled amplification module, the program-controlled amplification module is used to amplify and modulate the amplitude of the microwave signal, and the program-controlled amplification module is connected to the energy conversion module;

An energy conversion module, the energy conversion module is used to convert the microwave signal output by the program-controlled amplification module into a pulse modulated radio frequency electromagnetic field;

A power detection module is used to detect power signals of different frequencies input into the energy conversion module, and the power detection module is connected to the control module.

Preferably, the sensor module includes at least one group of thin film pressure sensors and low voltage rail-to-rail output operational amplifiers, and also includes an acceleration sensor.

Preferably, the power signal includes a forward power signal and a reverse power signal, the power detection module includes a forward power detection module and a reverse power detection module, the forward power detection module detects the forward power signal, the reverse power detection module detects the reverse power signal, and the forward power detection module and the reverse power detection module both include a coupled microstrip line, a circulator and a detection chip.

Preferably, the forward power detection module and the reverse power detection module share a circulator, and the detection chip model is an ADL5904 chip.

Preferably, the program-controlled amplification module comprises a digital attenuator and an HBT-type power amplifier which are arranged in series, wherein the digital attenuator is used to attenuate the microwave signal by different multiples, and the HBT-type power amplifier amplifies the attenuated microwave signal.

Preferably, the digital attenuator adopts a 6-bit HMC1122 chip, and the HBT power amplifier adopts a HMC415LP33E chip.

Preferably, the microwave transmitter module adopts a broadband PLLatinum radio frequency synthesizer LMX2582 with integrated VCO, and the microwave transmitter module outputs a microwave signal in the frequency band of 5.0 to 5.3 GHz;

The head-on-pillow conditions include the head on the left side of the pillow, the head in the middle of the pillow, the head on the right side of the pillow and the head off the pillow, and the head-on-pillow motion includes the head-on-pillow frequency and the head-on-pillow amplitude.

Preferably, the control module adopts a low-power multi-protocol SoC Bluetooth single chip nRF52832. The control module analyzes the head-on-pillow movement to identify the sleep-wake state, outputs a modulation signal of a specific mode and sets the amplification factor of the programmable amplifier module, and combines the head-on-pillow situation and power signals at different frequencies to realize the intelligent control function of the device.

A magnetic stimulator is constructed, which includes the above-mentioned magnetic stimulator circuit.

Preferably, the magnetic stimulator comprises a microstrip array antenna for energy conversion, and the microstrip array antenna is tilted so as to have a certain electrical tilt angle and mechanical tilt angle to enhance the directionality of the pulse modulated radio frequency electromagnetic field.

The beneficial effect of the utility model is that, unlike the traditional magnetic stimulator that directly inputs a strong pulse current into the coil (energy conversion device), microwaves (MHz, GHz level) are selected as carriers, and after being modulated by EEG signals or pulse sequences, they are input into the energy conversion device, and a pulse modulated radio frequency electromagnetic field is output. According to electromagnetic theory, the size of the energy conversion device needs to be close to the half wavelength of the signal to be transmitted. Because the microwave wavelength is short (cm, mm level), a microstrip array antenna with a low profile, small size and light weight can be selected as the energy conversion device to reduce the weight and size of the device. The device is placed directly under the pillow, and the treatment can be started by dropping the head on the pillow when going to bed, and no additional instrument needs to be worn during the treatment process. The device has an embedded acceleration sensor, which can identify the sleep-wake state according to the head movement on the pillow (frequency, amplitude), output a modulation signal of a specific mode and set the amplification factor of the programmable amplifier module; when in a sleep state or the fixed treatment time is up, the device stops outputting and enters a standby state. The microstrip array antenna is divided into left and right parts to expand the size of the energy conversion device, eliminating the worry that the head is not above the device and the poor therapeutic effect caused by the small size of the head not above the device; using a thin film pressure sensor, the output energy of the left and right antennas is scientifically distributed to reduce the energy waste on the opposite side when the head is biased to one side due to the large size; at the same time, the microstrip array antenna is designed to have a certain electrical tilt angle and mechanical tilt angle to enhance the directionality of the pulse modulated radio frequency electromagnetic field, and to compare and analyze the forward power and reverse power of different frequency points in the preset frequency band, select the frequency point with the highest energy transmission efficiency, and improve the energy conversion efficiency of the device.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

FIG1 is a circuit block diagram of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG2 is a schematic diagram of a circuit of a microwave transmitter module of a magnetic stimulator in a preferred embodiment of the present utility model;

FIG3 is a schematic circuit diagram of a program-controlled amplifier module of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG4 is a schematic diagram of an energy conversion module of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG5 is a schematic diagram of the installation of a microstrip array antenna according to a preferred embodiment of the present utility model;

FIG6 is a schematic diagram of a forward power detection module circuit of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG. 7 is a schematic diagram of a reverse power detection module circuit of a magnetic stimulator in a preferred embodiment of the present utility model.

FIG8 is a circuit diagram of a sensor module of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG9 is a circuit diagram of a controller module of a magnetic stimulator according to a preferred embodiment of the present invention;

FIG10 is a schematic diagram of an electroencephalogram signal of a preferred embodiment of the utility model;

FIG. 11 is a schematic diagram of a pulse sequence of a preferred embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

A magnetic stimulator circuit of a preferred embodiment of the utility model; as shown in FIG1 , comprises a control module, a microwave transmitter module, a programmable amplification module, an energy conversion module, a sensor and a detection module.

Specifically, as shown in Figure 1, the controller module is connected to the microwave transmitter module to transmit the frequency band signal to the microwave transmitter module, the microwave transmitter module is connected to the program-controlled amplifier module to transmit the microwave signal to the program-controlled amplifier module, the program-controlled amplifier module is connected to the energy conversion module to transmit the microwave signal to the energy conversion module. The controller module is connected to the program-controlled amplifier module to transmit the attenuation multiple and the modulation signal to the program-controlled amplifier module, the power detection module is connected to the controller module to transmit the power signal to the controller, and the sensor is connected to the controller module to transmit the head-in-pillow signal to the controller module.

Furthermore, as shown in FIG2 , based on the ‘biological window effect - frequency window’, the microwave transmitter module adopts the broadband PLLatinumTM RF synthesizer LMX2582 with integrated VCO. Unlike the traditional magnetic stimulator that directly inputs a strong pulse current into the coil (energy conversion device), microwaves (MHz, GHz level) are selected as the carrier, and after being modulated by the EEG signal or pulse sequence, they are input into the energy conversion device, and a pulse modulated RF electromagnetic field is output. The utility model selects microwave signals in the frequency band of 5.0 to 5.3 GHz, and uses a microstrip array antenna as the energy conversion device. The microstrip antenna has the characteristics of low profile, small size, light weight and easy installation, which can effectively reduce the size and weight of the device.

Further, as shown in FIG3 , the program-controlled amplifier module uses a digital attenuator and an HBT power amplifier in series to control the amplification factor, the digital attenuator uses the HNC1122 chip, and the HBT power amplifier uses the HMCC415LP33E chip; the microwave signal generated by the microwave transmitter module is attenuated by the digital attenuator and then amplified by the HBT power amplifier to achieve flexible control of the magnetic field intensity (power). The control module outputs a modulation signal to adjust the waveform of the microwave signal (carrier).

Furthermore, as shown in FIG4 , the energy conversion module uses a microstrip array antenna to convert the amplified and modulated microwave signal into a pulse modulated radio frequency electromagnetic field. The microstrip array antenna has a certain electrical tilt angle (as shown in FIG5 , left), and the left and right microstrip array antennas are set with a certain mechanical tilt angle (as shown in FIG5 , right) to enhance the directivity of the pulse modulated radio frequency electromagnetic field. The forward power (Pt) and reverse power (Pr) of the antenna are detected by using the transmitting and receiving characteristics of the microstrip array antenna.

Further, as shown in Figures 6-7, the power detection module includes a forward power detection module and a reverse power detection module, both of which include a circulator, a detection chip and a coupled microstrip line arranged in series, the circulator model is SC500SB, and the detection chip model is ADL5904. The power detection module is used to detect the reverse power and forward power of the energy conversion module at different frequency points, and then transmit the power signal to the control module.

Furthermore, as shown in FIG8 , the sensor includes three sets of thin film pressure sensors and operational amplifiers. The three sets of thin film pressure sensors are installed at the left, middle and right positions of the device. The model is SF45-65. The operational amplifier uses a low-voltage rail-to-rail output operational amplifier. The model is MV321, which is used to detect the situation of the head on the pillow (left, middle, right, away from the pillow); the sensor also includes an acceleration sensor. The model is MC3479, which is used to detect the movement of the head on the pillow (frequency and amplitude).

Furthermore, as shown in FIG9 , the controller module uses a chip of the nRF52832 model, which is a highly flexible ultra-low power multi-protocol SoC Bluetooth single chip. The microwave transmitter module is adjusted to generate a microwave signal in the ‘biological window effect-frequency window’ frequency band, and the forward power (Pt) and reverse power (Pr) of different frequency points in the frequency band transmitted by the power detection module are read, and the frequency point with the highest energy transmission efficiency (η=Pt/(Pt+Pr)) is dynamically captured; the position of the head on the pillow (left, middle, right) transmitted by the sensor is analyzed, and the power of the microwave signal input to the left and right antennas is scientifically allocated; the head on the pillow movement (frequency and amplitude) transmitted by the sensor is analyzed, the sleep-wake state is identified, and a modulation signal of a specific mode is output and the amplification factor of the programmable amplifier module is set.

When in use, first use the thin film pressure sensor, operational amplifier and controller module to detect whether the head is on the pillow, and the position of the pillow (left, middle, right). The resistance of the thin film pressure sensor is different for different pressures, and the voltage output by the operational amplifier is also different. The control module uses the embedded A/D (analog-to-digital) conversion submodule or interrupt submodule to respond to voltage changes. Generally, the voltage difference between the head on the pillow and not on the pillow is 2.2 to 3.0V, and the specific value is related to the distance between the head contact point and the sensor. When the head contact point is directly above the sensor, the voltage difference is the largest, about 3.0V.

When the head is on the pillow, the control module controls the microwave transmitter module to generate microwave signals within a preset frequency band (5.0-5.3 GHz), compares and analyzes the forward power and reverse power of different frequency points in the frequency band (such as 5.00 GHz, 5.05 GHz, 5.10 GHz, 5.15 GHz, 5.20 GHz, 5.25 GHz, and 5.30 GHz), and locks the frequency point with the highest energy transmission efficiency (such as 5.05 GHz).

After the frequency point is locked, the control module selects the user's modulation signal. The modulation signal can be a continuous EEG signal, as shown in Figure 9, or a pulse sequence, as shown in Figure 10; at the same time, based on the modulation signal, the initial amplification factor or attenuation factor of the programmable amplifier module is set.

The amplified and modulated microwave signal output by the programmable amplifier module is input into the microstrip array antenna to generate a pulse modulated radio frequency electromagnetic field.

Furthermore, the control module analyzes the head position on the pillow (left, middle, right, away from the pillow), the movement frequency and amplitude in real time to realize the intelligent control function. When the head is on the left side of the pillow, the magnification of the program-controlled amplification module of the left channel is increased; when the head is on the right side of the pillow, the magnification of the program-controlled amplification module of the right channel is increased; when the head is centered on the pillow, the magnification of the program-controlled amplification modules of the two channels is balanced. If it is detected that it is difficult to fall asleep, a low magnification is selected; if it is detected that it is difficult to fall asleep, a medium magnification is selected; if it is detected that it is very difficult to fall asleep, a high magnification is selected; if it is detected that it enters the sleep state, the output is stopped. At the same time, the forward power and reverse power of the current frequency point are detected every 5 seconds. When its energy transmission efficiency is less than 85% or the decrease value of the energy transmission efficiency Δη is less than -15%, the output is stopped, and the frequency point with the highest energy transmission efficiency is recaptured. When the treatment time is full, or the head is not on the pillow, or has entered the sleep state, or the battery power is less than the predetermined value, the instrument stops output.

A magnetic stimulator according to a preferred embodiment of the utility model comprises the above-mentioned magnetic stimulator circuit. The specific circuit part is the same as the above-mentioned structure and will not be repeated here. The energy conversion module adopts a microstrip array antenna with a certain electrical tilt angle and mechanical tilt angle to enhance the directionality of the pulse modulated radio frequency electromagnetic field.

It should be understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims (10)

1. A magnetic stimulator circuit, comprising a control module, wherein the control module is used to analyze a head-on-pillow signal, a power signal and an output control signal; Sensor module: The sensor module is used to detect the head on pillow signal, including the pillow condition and/or pillow movement. The sensor module is connected to the control module and is characterized by further comprising: A microwave transmitter module, which outputs a microwave signal and is connected to a program-controlled amplifier module; A program-controlled amplification module, the program-controlled amplification module is used to amplify and modulate the amplitude of the microwave signal, and the program-controlled amplification module is connected to the energy conversion module; An energy conversion module, the energy conversion module is used to convert the microwave signal output by the program-controlled amplification module into a pulse modulated radio frequency electromagnetic field; A power detection module is used to detect power signals of different frequencies input into the energy conversion module, and the power detection module is connected to the control module. 2. The circuit according to claim 1 is characterized in that the sensor module includes at least one set of thin film pressure sensors and low voltage rail-to-rail output operational amplifiers, and also includes an acceleration sensor. 3. The circuit according to any one of claims 1-2 is characterized in that: the power signal includes a forward power signal and a reverse power signal, the power detection module includes a forward power detection module and a reverse power detection module, the forward power detection module detects the forward power signal, the reverse power detection module detects the reverse power signal, and the forward power detection module and the reverse power detection module both include a coupled microstrip line, a circulator and a detection chip. 4. The circuit according to claim 3 is characterized in that: the forward power detection module and the reverse power detection module share a circulator, and the detection chip is an ADL5904 model chip. 5. The circuit according to claim 1 is characterized in that: the programmable amplification module includes a digital attenuator and an HBT power amplifier arranged in series, the digital attenuator is used to attenuate the microwave signal by different multiples, and the HBT power amplifier amplifies the attenuated microwave signal. 6. The circuit according to claim 5, characterized in that: the digital attenuator adopts a 6-bit HMC1122 model chip, and the HBT power amplifier adopts a HMC415LP33E model chip. 7. The circuit according to claim 1, characterized in that: the microwave transmitter module adopts a broadband PLLatinum radio frequency synthesizer LMX2582 with integrated VCO, and the microwave transmitter module outputs a microwave signal in the frequency band of 5.0 to 5.3 GHz; The head-on-pillow conditions include the head on the left side of the pillow, the head in the middle of the pillow, the head on the right side of the pillow and the head off the pillow, and the head-on-pillow motion includes the head-on-pillow frequency and the head-on-pillow amplitude. 8. The circuit according to claim 7 is characterized in that: the control module adopts a low-power multi-protocol SoC Bluetooth single chip nRF52832, the control module analyzes the head-on-pillow action to identify the sleep-wake state, outputs a modulation signal of a specific mode and sets the amplification factor of the programmable amplifier module, and combines the head-on-pillow situation and power signals at different frequencies to realize the intelligent control function of the device. 9. A magnetic stimulator, characterized in that the magnetic stimulator comprises a magnetic stimulator circuit as described in any one of claims 1 to 8. 10. The magnetic stimulator according to claim 9 is characterized in that: the magnetic stimulator contains a microstrip array antenna for energy conversion, and the microstrip array antenna is tilted to have a certain electrical tilt angle and mechanical tilt angle to enhance the directionality of the pulse modulated radio frequency electromagnetic field.