A non-disassembly coil switching magnetic stimulator and magnetic stimulation method

Abstract

The present invention discloses a non-removable coil switching magnetic stimulator, comprising: a main controller; a magnetic stimulation body; a stimulation coil, wherein the magnetic stimulation body comprises: a microprocessor for realizing information interaction with the main controller; a power supply for receiving control instructions of the microprocessor; a charging capacitor connected to the power supply; a switching control unit connected to the charging capacitor for realizing line switching; a plurality of interfaces arranged on the magnetic stimulator body for receiving control of the switching control unit and connected one-to-one with a plurality of stimulation coils of equal quantity; a coil detection unit for detecting status information of a plurality of stimulation coils and reporting it to the microprocessor. The present invention also discloses a stimulation method thereof. The present invention switches a plurality of stimulation coils of different applications by means of a switching control unit, and can freely select the corresponding stimulation coil according to the stimulation scheme, and is easy to operate. At the same time, the present invention has a simple structure, low cost, and effectively reduces the risk of equipment damage caused by coil replacement.

Description

Technical Field

[0001] The present invention relates to a magnetic stimulator and a magnetic stimulation method, in particular to a disassembly-free coil switching magnetic stimulator and a magnetic stimulation method, belonging to the technical field of medical devices and methods. Background Art

[0002] Magnetic stimulators can penetrate the human skull and tissues by generating high-intensity pulsed magnetic fields. The central and peripheral nerves deep in the human body can generate induced currents under the action of the pulsed magnetic field, causing nerve cells to depolarize, thereby achieving the purpose of regulating nerve function. Magnetic stimulation technology has been increasingly used in clinical and scientific research due to its non-invasive and painless physical properties and the ability to achieve deep stimulation. With the continuous expansion of applications, stimulation coils suitable for different diseases are increasingly being used, and it has become a necessary requirement to replace different coils according to the actual conditions of the patient during clinical treatment.

[0003] The most common magnetic stimulator on the market has only one coil interface. The connection between the stimulation coil and the magnetic stimulator host is usually connected by a heavy-duty connector or an aviation connector. The reason is that the magnetic stimulator needs to generate a high-voltage, high-current discharge pulse for the stimulation coil during stimulation, which requires very high contact resistance between the connector pins. Aviation plugs and heavy-duty connectors are very troublesome to replace due to their own tightness requirements; in addition, frequent replacement will bring the hidden danger of poor contact between the connector pins. If poor contact occurs, the large discharge voltage and current will cause the abnormal discharge interface to burn and the safety risk of damage to the components of the magnetic stimulator host.

[0004] The patent application document with application number 200810046759.8 mentions a control method for the timed discharge of multiple coils of a transcranial magnetic field stimulator with multiple stimulation coils. This technical solution uses multiple power supplies or a single ultra-high power power supply and multiple groups of discharge control thyristors, which can solve the problem of coil switching, but the cost is too high. Summary of the invention

[0005] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a non-disassembly type coil switching magnetic stimulator with simple structure, low cost, safety and high efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A non-disassembly type coil switching magnetic stimulator, comprising: a main controller; a magnetic stimulation body connected to the main controller; a stimulation coil connected to the stimulator body, wherein the magnetic stimulation body comprises:

[0008] A microprocessor for information exchange with the main controller;

[0009] a power supply receiving control instructions from a microprocessor;

[0010] a charging capacitor connected to a power source;

[0011] A switching control unit connected to the charging capacitor and used to implement line switching;

[0012] A plurality of interfaces provided on the magnetic stimulator body, used to receive control of the switching control unit and connected to an equal number of stimulation coils in a one-to-one correspondence;

[0013] A coil detection unit is used to detect status information of multiple stimulation coils and report the detection information to the microprocessor.

[0014] Furthermore, the switching control unit includes a coil selection circuit formed by a microprocessor, a switching electronic switch S2, and a plurality of stimulation coils, which is used to select stimulation coils with different therapeutic effects; a charging circuit formed by a microprocessor, a switch S1, a power supply, and a charging capacitor, which is used to charge the charging capacitor 106; a bidirectional current generating circuit formed by a microprocessor 103 and a thyristor, which realizes bidirectional charging and discharging of the stimulation coil.

[0015] The above-mentioned thyristor includes thyristor D1 and thyristor D2 arranged in parallel. Before the stimulation coil is reversely discharged, the thyristor D1 can be turned on to generate a negative current, and the thyristor D2 can be turned on to discharge the stimulation coil.

[0016] The switching electronic switch S2 may be a plurality of IGBT switches or relays, and the switching electronic switch S1 mentioned above may be an IGBT switch.

[0017] Furthermore, the above-mentioned state information of the stimulation coil includes the stimulation coil ID, temperature and interface number.

[0018] The present invention also provides a magnetic stimulation method based on a non-detachable coil switching magnetic stimulator, which includes the following steps:

[0019] S1 stimulation coil information detection: the coil detection unit detects the state of the stimulation coil and uploads the detection information to the microprocessor, and the microprocessor determines whether the query information of the main controller is received. If received, step S2 is performed, otherwise step S1 is repeated;

[0020] S2: Information feedback: The microprocessor sends the state information of the stimulation coil to the main controller, which displays the relevant information and confirms whether to select the stimulation scheme. If not, step S2 is repeated. If selected, a stimulation scheme instruction is sent to the microprocessor and the next step is entered.

[0021] S3: Instruction reception judgment: The microprocessor judges whether the instruction is received correctly. If the instruction is not received correctly, the microprocessor sends a reception error instruction to the main controller and returns to step S2. If the instruction is received correctly, the microprocessor controls the switching control unit to switch the connection of the stimulation coil according to the instruction and enters the next step.

[0022] S4: Stimulation instruction judgment: judge whether the main controller sends a stimulation instruction. If not, repeat step S3. If it has been sent, judge whether the microprocessor correctly receives the start instruction. If not, repeat this step. If it is received correctly, proceed to the next step.

[0023] S5: Power supply charging for stimulation operation: The microprocessor controls the power supply to charge the charging capacitor, controls the switching control unit to discharge the stimulation coil, and at the same time determines whether the number of discharges reaches the requirements set by the stimulation program and whether there is a stop instruction. If so, the operation ends. If not, it returns to the step of charging the charging capacitor with the power supply.

[0024] The invention is beneficial in that: the invention has a plurality of stimulation coils for different applications, and the stimulation coils are switched by switching the control unit, without removing the stimulation coil and replacing another one, and the corresponding stimulation coil can be freely selected according to the stimulation scheme, which is easy to operate. At the same time, the invention has a simple structure, low cost, and effectively reduces the risk of equipment damage caused by replacing the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the switching control unit of the present invention;

[0027] Figure 3 Flow chart of the magnetic stimulation method according to the present invention.

[0028] Meaning of the reference numerals in the figures:

[0029] 101. Main controller 102. Magnetic stimulator body 103. Microprocessor

[0030] 104, power supply 105, coil detection unit 106, charging capacitor

[0031] 107, switching control unit 108, first interface 109, second interface

[0032] 110, third interface 111, first stimulation coil 112, second stimulation coil

[0033] 113. The third coil. DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example

[0036] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0037] like Figure 1 As shown: a non-detachable coil switching magnetic stimulator, comprising: a main controller 101 (computer or tablet), which is internally provided with a stimulation program for displaying a stimulation program interface, sending control instructions, and receiving state information of the stimulation coil sent by a microprocessor 103; a magnetic stimulator body 102 connected to the main controller 101; a stimulation coil connected to the magnetic stimulator body 102, wherein the magnetic stimulator body 102 comprises: a microprocessor 103 for realizing information exchange with the main controller 101, for sending the state information of the stimulation coil to the main controller 101 through a fixed protocol, and at the same time controlling a power supply 104 to charge a charging capacitor 106 according to the operation status of the device; and receiving a microprocessor 103. 3 control instructions; a charging capacitor 106 (high-voltage pulse capacitor) connected to the power supply 104; a switching control unit 107 connected to the charging capacitor 106 and used for realizing line switching; three interfaces (a first interface 108, a second interface 109 and a third interface 110) arranged on the magnetic stimulator body 102, used for receiving the control of the switching control unit 107 and connected to three stimulation coils (a first coil 111, a second coil 112 and a third coil 113) in a one-to-one correspondence; and a coil detection unit 105 for detecting the status information of multiple stimulation coils (stimulation coil ID, temperature and interface number, etc.) and reporting the detection information to the microprocessor 103.

[0038] Figure 2 It is a schematic diagram of the structure of the switching control unit described in the present invention.

[0039] like Figure 2 As shown: In this embodiment, the switching control unit 107 includes a microprocessor 103, a switching electronic switch S2, and a coil selection circuit formed by three stimulation coils, which is used to select stimulation coils with different therapeutic effects; a charging circuit formed by the microprocessor 103, a switch S1, a power supply 104 and a capacitor, which is used to charge the charging capacitor; a bidirectional current generating circuit formed by the microprocessor and a thyristor realizes bidirectional charging and discharging of the stimulation coil. Specifically: the above-mentioned thyristor includes thyristor D1 and thyristor D2 arranged in parallel. Before the stimulation coil is reversely discharged, the thyristor D1 can be turned on to generate a negative current, and the thyristor D2 can be turned on to discharge the stimulation coil. The switching electronic switch S2 is a plurality of IGBT switches, which can also be a relay, and the above-mentioned switching electronic switch S1 is an IGBT switch.

[0040] Figure 3 Flow chart of the magnetic stimulation method according to the present invention.

[0041] like Figure 3 As shown: The magnetic stimulation process of the present invention is:

[0042] S1 Stimulation coil information detection: The coil detection unit 105 detects the state of the stimulation coil of each interface, and uploads the detection information (stimulation coil ID, temperature and interface bit number, etc.) to the microprocessor 103, and records it in the program. The microprocessor 103 determines whether the query information of the main controller 101 is received. If received, step S2 is performed, otherwise step S1 is repeated;

[0043] S2: Information feedback: The microprocessor 103 sends the state information of the stimulation coil to the main controller 101 through the communication protocol. The main controller 101 receives the coil state information data packet, displays the relevant information on the display interface after parsing, and confirms whether to select the stimulation scheme. If not, repeat step S2. If selected, send the stimulation scheme instruction to the microprocessor. In this process, the doctor customizes the stimulation scheme according to the relevant information, edits the stimulation intensity, stimulation frequency, stimulation pulse and other data as well as the head ID (stimulation coil ID). Each stimulation coil of different shapes corresponds to a different ID, and then proceeds to the next step;

[0044] S3: Instruction reception judgment: The microprocessor 103 judges whether the instruction is received correctly. If the instruction is not received correctly, the microprocessor 103 sends a reception error instruction to the main controller 101, and returns to step S2. The main controller 101 will issue an instruction scheme again. If the instruction is received correctly, the microprocessor 103 will automatically correspond to the interface number according to the selected head information, and switch to the corresponding interface through the IO control switching control unit 107, that is, according to the instruction control switching control unit 107, the stimulation coil is switched to be connected, and the green LED corresponding to the interface lights up to prompt the user whether the stimulation coil currently selected is correct, and then proceed to the next step;

[0045] S4: Stimulation instruction judgment: judge whether the main controller sends a stimulation start instruction. If not, repeat step S3. If it has been sent, judge whether the microprocessor correctly receives the start instruction. If not, repeat this step. If it is received correctly, proceed to the next step.

[0046] S5: Power charging for stimulation operation: The microprocessor 103 controls the power supply 104 to charge the charging capacitor 106. After the preset voltage is charged, the microprocessor 103 controls the charging to end, and controls the switching control unit 107 to open the discharge silicon to discharge the stimulation coil. The microprocessor 103 counts the number of discharges. When the number of pulses set in the program is reached or a stop command is received, the discharge is stopped. If not, the discharge is returned to the step of the power supply 104 charging the charging capacitor 106.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A non-disassembly coil switching magnetic stimulator, comprising: Main controller; a magnetic stimulation body in communication with a main controller; The stimulation coil connected to the stimulator body is characterized in that the magnetic stimulation body comprises: A microprocessor for information exchange with the main controller; a power supply receiving control instructions from a microprocessor; a charging capacitor connected to a power source; A switching control unit connected to the charging capacitor and used to implement line switching; A plurality of interfaces provided on the magnetic stimulator body, used to receive control of the switching control unit and connected to an equal number of stimulation coils in a one-to-one correspondence; A coil detection unit is used to detect status information of multiple stimulation coils and report the detection information to the microprocessor.

2. A non-detachable coil switching magnetic stimulator according to claim 1, characterized in that: The switching control unit includes a coil selection circuit formed by a microprocessor, a switching electronic switch S2, and multiple stimulation coils; a charging circuit formed by a microprocessor, a switch S1, a power supply and a capacitor; and a bidirectional current generating circuit formed by a microprocessor and a thyristor.

3. A non-detachable coil switching magnetic stimulator according to claim 2, characterized in that: The thyristor comprises a thyristor D1 and a thyristor D2 which are arranged in parallel.

4. The non-detachable coil switching magnetic stimulator according to claim 2, characterized in that: The switching electronic switch S2 is a plurality of IGBT switches or relays.

5. The non-detachable coil switching magnetic stimulator according to claim 2, characterized in that: The switching electronic switch S1 is an IGBT switch.

6. The non-detachable coil switching magnetic stimulator according to claim 1, characterized in that: The state information of the stimulation coil includes the stimulation coil ID, temperature and interface number.

7. A magnetic stimulation method based on the non-detachable coil switching magnetic stimulator according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1 Stimulation coil information detection: The coil detection unit detects the state of the stimulation coil and uploads the detection information to the microprocessor. The microprocessor determines whether the query information of the main controller is received. If received, step S2 is performed, otherwise step S1 is repeated; S2: Information feedback: The microprocessor sends the state information of the stimulation coil to the main controller, which displays the relevant information and confirms whether to select the stimulation scheme. If not, step S2 is repeated. If selected, a stimulation scheme instruction is sent to the microprocessor and the next step is entered. S3: Instruction reception judgment: The microprocessor judges whether the instruction is received correctly. If the instruction is not received correctly, the microprocessor sends a reception error instruction to the main controller and returns to step S2. If the instruction is received correctly, the microprocessor controls the switching control unit to switch the connection of the stimulation coil according to the instruction and enters the next step. S4: Stimulation instruction judgment: judge whether the main controller sends a stimulation instruction. If not, repeat step S3. If it has been sent, judge whether the microprocessor correctly receives the start instruction. If not, repeat this step. If it is received correctly, proceed to the next step. S5: Power supply charging for stimulation operation: The microprocessor controls the power supply to charge the charging capacitor, controls the switching control unit to discharge the stimulation coil, and at the same time determines whether the number of discharges reaches the requirements set by the stimulation program and whether there is a stop instruction. If so, the operation ends. If not, it returns to the step of charging the charging capacitor with the power supply.

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