A magnetic field intensity detection device of a transcranial magnetic stimulation instrument

Abstract

The utility model discloses a kind of magnetic field intensity detection devices of transcranial magnetic stimulator, including transcranial magnetic stimulator host computer, stimulating coil clap, head model, magnetic field intensity inductor, signal processing module and data processing unit, magnetic field intensity inductor is installed in head model and close to head model surface, magnetic field intensity inductor, signal processing module and data processing unit are sequentially electrically connected, stimulating coil clap can be close to head model surface and produce pulsed magnetic field, magnetic field intensity inductor is used to induct pulsed magnetic field and send magnetic field energy analog signal to signal processing module, signal processing module is used to convert magnetic field energy analog signal into magnetic field energy digital signal and send to data processing unit, data processing unit is used to record and store magnetic field energy digital signal, and generate magnetic field intensity detection result. The utility model can detect the performance of transcranial magnetic stimulator by detecting the pulsed magnetic field of stimulating coil, to ensure the safety of patient.

Description

Technical Field

[0001] This utility model relates to the field of transcranial magnetic stimulation (TMS) medical equipment technology, and particularly to a magnetic field strength detection device for a TMS. Background Technology

[0002] Transcranial magnetic stimulation (TMS) is a magnetic field stimulation technique that uses pulsed magnetic fields to act on the central nervous system (mainly the brain), changing the membrane potential of cortical nerve cells, causing them to generate induced currents, affecting brain metabolism and neural electrical activity, thereby triggering a series of physiological and biochemical reactions.

[0003] Transcranial magnetic stimulation (TMS) devices utilize magnetic field stimulation technology to generate a changing pulsed magnetic field through a specific stimulation coil. When the magnetic field acts on the human body, it induces currents in the tissues, thereby stimulating nerve cells, muscle cells, and other cells, affecting their excitability and function, in order to treat diseases or improve physical condition.

[0004] like Figure 1 As shown, in the prior art, the transcranial magnetic stimulation device is connected to a stimulation coil 100. When working, the stimulation coil 100 generates a pulsed magnetic field that acts on the central nervous system (mainly the brain) of the patient 101, changing the membrane potential of the cortical nerve cells, causing them to generate induced current, affecting brain metabolism and nerve electrical activity, thereby causing a series of physiological and biochemical reactions, achieving the effect of treating diseases. It has a significant effect on treating patients with depression, insomnia, anxiety and other diseases.

[0005] Transcranial magnetic stimulation (TMS) devices primarily act on the brain, requiring high accuracy in the magnetic field strength of the coils. However, as the device ages, the stimulation parameters can easily change. Since the coils act on the patient's skull, excessively high magnetic field strength can lead to overtreatment and potentially harm the patient; conversely, insufficient magnetic field strength will fail to achieve the desired therapeutic effect. Therefore, there is an urgent need for a device capable of detecting the magnetic field strength of TMS devices, specifically the pulsed magnetic field strength of the stimulation coils. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a magnetic field strength detection device for a transcranial magnetic stimulator. This device can detect the performance of the transcranial magnetic stimulator by detecting the pulsed magnetic field of the stimulation coil, thereby ensuring patient safety. It also facilitates medical personnel in regularly checking whether the magnetic field strength output by the stimulation coil of the transcranial magnetic stimulator meets the standards.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is: a magnetic field strength detection device for a transcranial magnetic stimulation (TMS) instrument, comprising a TMS main unit and a stimulation coil paddle, the stimulation coil paddle being connected to the TMS main unit via wires, and further comprising a head model, a magnetic field strength sensor, a signal processing module, and a data processing unit. The magnetic field strength sensor is installed inside the head model and close to the surface of the head model. The magnetic field strength sensor, the signal processing module, and the data processing unit are electrically connected in sequence. The stimulation coil paddle can approach the surface of the head model and generate a pulsed magnetic field. The magnetic field strength sensor is used to sense the pulsed magnetic field output by the stimulation coil paddle and send a magnetic field energy analog signal to the signal processing module. The signal processing module is used to convert the magnetic field energy analog signal into a magnetic field energy digital signal and send it to the data processing unit. The data processing unit is used to record and store the magnetic field energy digital signal and generate a magnetic field strength detection result.

[0008] Preferably, the magnetic field strength detection device of the transcranial magnetic stimulator further includes a multi-axis robotic arm, the stimulation coil is mounted on the multi-axis robotic arm, and the main unit of the transcranial magnetic stimulator is electrically connected to the multi-axis robotic arm to control the operation of the multi-axis robotic arm.

[0009] Preferably, the head model is a hemispherical plastic container, which includes a plastic shell with a slot on the shell. The magnetic field strength sensor is installed in the slot, and the plastic shell has an inner cavity filled with water. The magnetic field strength sensor includes a rod-shaped body with a spherical sensing part at one end. A Hall sensor is installed inside the rod-shaped body, and the sensing end of the Hall sensor extends into the spherical sensing part.

[0010] Preferably, a base is provided below the head model, the head model is mounted on the base, and the signal processing module is installed inside the base. The signal processing module includes a signal amplification and filtering circuit, an analog-to-digital conversion circuit, a control module, and a data transmission circuit. The input terminal of the signal amplification and filtering circuit is electrically connected to the signal output terminal of the magnetic field strength sensor, the output terminal of the signal amplification and filtering circuit is electrically connected to the input terminal of the analog-to-digital conversion circuit, and the output terminal of the analog-to-digital conversion circuit is electrically connected to the control module. The control module is electrically connected to the data processing unit through the data transmission circuit. The signal processing module also includes a display driver module and a display. The control module is connected to the display through the display driver circuit, and the display shows pulsed magnetic field information. The control module is a microcontroller, the display is an LCD, and the data processing unit is a computer connected to the data processing unit via a USB data cable.

[0011] Preferably, the number of magnetic field strength sensors is at least two, which are installed at intervals on a predetermined position on the head model.

[0012] The beneficial effects of this invention are as follows: This invention can sense the pulsed magnetic field output by the stimulation coil via a magnetic field strength sensor on the head model and send a simulated magnetic field energy signal to the signal processing module. The signal processing module then converts the simulated magnetic field energy signal into a digital magnetic field energy signal and sends it to the data processing unit. The data processing unit then records and stores the digital magnetic field energy signal and generates a magnetic field strength detection result. Therefore, this invention can detect the performance of a transcranial magnetic stimulator by detecting the pulsed magnetic field of the stimulation coil, thereby ensuring patient safety. It also facilitates medical personnel in regularly checking whether the magnetic field strength output by the stimulation coil of the transcranial magnetic stimulator meets the standards. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the stimulation coil structure in a transcranial magnetic stimulation (TMS) device used to treat patients in the prior art.

[0014] Figure 2 This is a schematic diagram of the magnetic field strength detection device of the transcranial magnetic stimulation instrument of this utility model.

[0015] Figure 3 This is a schematic diagram of the head model, magnetic field strength sensor, and stimulation coil of this utility model.

[0016] Figure 4 This is a block diagram of the magnetic field strength sensor, signal processing module, and data processing unit.

[0017] Figure 5 A schematic diagram of the structure of the figure-eight shaped stimulation coil.

[0018] Figure 6 This is a schematic diagram of the pulsed magnetic field displayed by the magnetic field strength detection device of the transcranial magnetic stimulation instrument of this utility model.

[0019] Figure 7 This is a graph showing the magnetic field strength attenuation curve displayed by the magnetic field strength detection device of the transcranial magnetic stimulation instrument of this invention. Detailed Implementation

[0020] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figures 2-4As shown, this utility model is a magnetic field strength detection device for a transcranial magnetic stimulation (TMS) instrument, including a TMS main unit 1 and a stimulation coil 2. The stimulation coil 2 is connected to the TMS main unit 1 via wires. It also includes a head model 3, a magnetic field strength sensor 4, a signal processing module 5, and a data processing unit 6. The magnetic field strength sensor 4 is installed inside the head model 3 and close to its surface. The magnetic field strength sensor 4, signal processing module 5, and data processing unit 6 are electrically connected in sequence. The stimulation coil 2 can approach the surface of the head model 3 and generate a pulsed magnetic field. The magnetic field strength sensor 4 senses the pulsed magnetic field output by the stimulation coil 2 and sends an analog magnetic field energy signal to the signal processing module 5. The signal processing module 5 converts the analog magnetic field energy signal into a digital magnetic field energy signal and sends it to the data processing unit 6. The data processing unit 6 records and stores the digital magnetic field energy signal and generates a magnetic field strength detection result. See also... Figure 7 The magnetic field strength detection result is a magnetic field strength decay curve over a period of time (e.g., 15 days). Based on this curve, the amount of magnetic field strength decay over that period can be determined, thus assessing the performance of the transcranial magnetic stimulation (TMS) device. This invention uses a magnetic field strength sensor 4 on the head model 3 to sense the pulsed magnetic field output by the stimulation coil 2 and sends it to the signal processing module 5 as an analog magnetic field energy signal. The signal processing module 5 then converts the analog signal into a digital signal and sends it to the data processing unit 6. The data processing unit 6 records and stores the digital signal and generates the magnetic field strength detection result. Therefore, this invention can detect the performance of the TMS device by detecting the pulsed magnetic field of the stimulation coil 2, ensuring patient safety and facilitating regular checks by medical personnel to ensure the magnetic field strength output by the TMS stimulation coil meets standards. Furthermore, the magnetic field strength sensor 4 can also detect the pulsed magnetic field frequency, number of stimulations, and stimulation time of the stimulation coil 2, obtaining precise quantitative data.

[0022] like Figure 2 As shown, the magnetic field strength detection device of the transcranial magnetic stimulation (TMS) instrument also includes a multi-axis robotic arm 7. The stimulation coil 2 is mounted on the multi-axis robotic arm 7. The TMS host 1 is electrically connected to the multi-axis robotic arm 7 to control its operation. By setting up the multi-axis robotic arm 7, the stimulation coil 2 can be automatically moved to the position of the magnetic field strength sensor 4 on the head model 3, which is convenient to operate.

[0023] like Figure 2 and Figure 3As shown, the head model 3 is a hemispherical plastic container, which includes a plastic shell with a slot 31 on top. The magnetic field strength sensor 4 is installed in the slot 31. An inner cavity filled with water is located inside the plastic shell. This invention uses a water-filled hemispherical plastic container, which is made of non-metallic material, thus not interfering with the magnetic field. It is low in cost and has a density closer to that of a human head. The slot 31 on the plastic shell facilitates the installation, removal, and positioning of the magnetic field strength sensor 4.

[0024] like Figure 2 and Figure 3 As shown, the magnetic field strength sensor 4 includes a rod-shaped body 41, one end of which is provided with a spherical sensing part 42. A Hall sensor is installed inside the rod-shaped body 41, and the sensing end of the Hall sensor extends into the spherical sensing part 42. The spherical sensing part 42 is located on the surface of the head model 3.

[0025] like Figure 2 As shown, a base 8 is provided below the head model 3, the head model 3 is mounted on the base 8, and the signal processing module 5 is installed inside the base 8.

[0026] like Figure 4 As shown, the signal processing module 5 includes a signal amplification and filtering circuit 51, an analog-to-digital conversion circuit 52, a control module 53, and a data transmission circuit 54. The input terminal of the signal amplification and filtering circuit 51 is electrically connected to the signal output terminal of the magnetic field strength sensor 4, the output terminal of the signal amplification and filtering circuit 51 is electrically connected to the input terminal of the analog-to-digital conversion circuit 52, the output terminal of the analog-to-digital conversion circuit 52 is electrically connected to the control module 53, and the control module 53 is electrically connected to the data processing unit 6 through the data transmission circuit 54. The signal amplification and filtering circuit 51 is used to amplify and filter the analog magnetic field energy signal output by the magnetic field strength sensor 4. The analog-to-digital conversion circuit 52 is used to convert the analog magnetic field energy signal into a digital magnetic field energy signal, so as to quantify the magnetic field strength, stimulation frequency, number of stimulations and stimulation time. This allows for accurate measurement of the magnetic field strength, stimulation frequency, number of stimulations and stimulation time output by the stimulation coil 2 of the transcranial magnetic stimulator. This comparison can then determine whether the output magnetic field strength, stimulation frequency, number of stimulations and stimulation time of the transcranial magnetic stimulator are accurate. If the output parameters are inaccurate, repair and calibration are required. Only when the output parameters match the data measured by the transcranial magnetic stimulator detection device can the stimulation coil 2 of the transcranial magnetic stimulator act on the patient's central nervous system (mainly the brain). Otherwise, there are safety hazards.

[0027] like Figure 4 As shown, the signal processing module 5 also includes a display driver module 55 and a display 56, see [link / reference]. Figure 2 The display 56 is mounted on the base 8 (see...) Figure 2 The control module 53 is connected to the display 56 via the display driver 55, and the display 56 displays the pulse magnetic field information. The control module 53 transmits the processed digital signal to the display driver circuit 55, and the display driver circuit 55 displays a schematic diagram of the pulse magnetic field on the display 56. (See attached diagram.) Figure 6 The display also shows information such as magnetic field strength, frequency, number of stimuli, and stimulation time. The control module 53 is a microcontroller, the display 5 is an LCD, and the data processing unit 6 is a computer. The computer is connected to the data processing unit 6 via a USB data cable. The computer has dedicated software installed to record and store digital signals of magnetic field energy and generate magnetic field strength attenuation curves.

[0028] like Figure 2 and Figure 5 As shown, the number of magnetic field intensity sensors 4 is at least two, which are installed at intervals on the head model 3 at predetermined positions. Having two or more magnetic field intensity sensors 4 allows for the detection of the magnetic field energy emitted by the "O"-shaped stimulation coil using only one sensor. Figure 2 and Figure 3 The stimulation coil in the device is an "O"-shaped stimulation coil; however, two magnetic field strength sensors can be used to detect "8"-shaped stimulation coils. Figure 5 The stimulation coil in the device is a figure-eight shaped stimulation coil with a figure-eight shaped stimulation coil 21. On the other hand, the magnetic field energy of the stimulation coil can be detected by different magnetic field strength sensors 4 to obtain multiple detection results, thereby avoiding misjudgment due to the abnormality of a certain magnetic field strength sensor 4 and improving detection accuracy.

[0029] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. A magnetic field strength detection device for a transcranial magnetic stimulation (TMS) device, comprising a TMS main unit and a stimulation coil paddle, wherein the stimulation coil paddle is connected to the TMS main unit via an electrical wire, characterized in that: It also includes a head model, a magnetic field strength sensor, a signal processing module, and a data processing unit. The magnetic field strength sensor is installed inside the head model and close to the surface of the head model. The magnetic field strength sensor, the signal processing module, and the data processing unit are electrically connected in sequence. The stimulation coil can approach the surface of the head model and generate a pulsed magnetic field. The magnetic field strength sensor is used to sense the pulsed magnetic field output by the stimulation coil and send a magnetic field energy analog signal to the signal processing module. The signal processing module is used to convert the magnetic field energy analog signal into a magnetic field energy digital signal and send it to the data processing unit. The data processing unit is used to record and store the magnetic field energy digital signal and generate a magnetic field strength detection result.

2. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 1, characterized in that: It also includes a multi-axis robotic arm, on which the stimulation coil is mounted, and the transcranial magnetic stimulation device is electrically connected to the multi-axis robotic arm to control its operation.

3. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 1, characterized in that: The head model is a hemispherical plastic container, which includes a plastic shell with a slot on the shell. The magnetic field strength sensor is installed in the slot, and the plastic shell has an inner cavity filled with water.

4. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 3, characterized in that: The magnetic field strength sensor includes a rod-shaped body, one end of which is provided with a spherical sensing part. A Hall sensor is installed inside the rod-shaped body, and the sensing end of the Hall sensor extends into the spherical sensing part.

5. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 1, characterized in that: The head model is mounted on a base, and the signal processing module is installed inside the base.

6. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 5, characterized in that: The signal processing module includes a signal amplification and filtering circuit, an analog-to-digital conversion circuit, a control module, and a data transmission circuit. The input terminal of the signal amplification and filtering circuit is electrically connected to the signal output terminal of the magnetic field strength sensor, the output terminal of the signal amplification and filtering circuit is electrically connected to the input terminal of the analog-to-digital conversion circuit, the output terminal of the analog-to-digital conversion circuit is electrically connected to the control module, and the control module is electrically connected to the data processing unit through the data transmission circuit.

7. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 6, characterized in that: The signal processing module also includes a display driver module and a display. The control module is connected to the display through a display driver circuit, and the display shows pulse magnetic field information.

8. The magnetic field strength detection device of the transcranial magnetic stimulation device according to claim 7, characterized in that: The control module is a microcontroller, the display is an LCD display, and the data processing unit is a computer, which is connected to the data processing unit via a USB data cable.

9. The magnetic field strength detection device for the transcranial magnetic stimulation device according to any one of claims 1-8, characterized in that: The number of magnetic field strength sensors is at least two, which are installed at intervals on a predetermined position on the head model.

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