Driving circuit and muscle electrical stimulator

Abstract

The utility model relates to the technical field of signal processing, and provides a drive circuit, which is used in a muscle electrical stimulator, and comprises two relays respectively connected with a signal source and used for receiving control signals and controlling the working states of an isolation coupling transformer and a power driver; the power driver is used for controlling a load connected with the driving circuit according to the control signal; the isolation coupling transformer is connected between the power driver and the load for electrically isolating the control signal from the load. The isolation coupling transformer is introduced into the driving circuit, so that the load connected with the driving circuit can be prevented from being influenced by electrical interference, and the safety and reliability of the muscle electrical stimulator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of signal processing, in particular to a driving circuit and a muscle electrical stimulator. Background Art

[0002] Electrical interference refers to the interference of unwanted voltage or current signals in a circuit with the target signal. These signals may come from external sources or be caused by components or layout inside the circuit. Electrical interference may cause circuit performance degradation and cause adverse effects, such as generating noise, reducing signal quality, causing malfunctions or damaging electronic components. When designing and using circuits, measures are usually required to reduce or suppress the impact of electrical interference to ensure the normal operation of the circuit. Especially in the field of medical health, the impact of electrical interference is particularly serious. Utility Model Content

[0003] The embodiment of the utility model provides a driving circuit and a muscle electrical stimulator. By introducing an isolation coupling transformer in the driving circuit applied to the muscle electrical stimulator, the load connected to the driving circuit can be prevented from being affected by electrical interference, thereby improving the safety and reliability of the muscle electrical stimulator.

[0004] In the first aspect, an embodiment of the utility model provides a driving circuit, which is used in a muscle electrical stimulator, and includes: two relays, respectively connected to a signal source, for receiving a control signal and controlling the working state of an isolation coupling transformer and a power driver; a power driver, for controlling a load connected to the driving circuit according to the control signal; an isolation coupling transformer connected between the power driver and the load, for isolating the electrical signal between the control signal and the load.

[0005] Preferably, the control ends of the two relays are connected to the signal source, wherein the contact of one relay is connected to the input end of the power driver; the contact of the other relay is connected to the input end of the isolation coupling transformer, and the output end of the power driver is connected to the input end of the isolation coupling transformer.

[0006] Preferably, the output end of the isolation coupling transformer is connected to a load.

[0007] Preferably, the isolation coupling transformer comprises a single-phase double-winding isolation coupling transformer.

[0008] Preferably, the single-phase dual-winding isolation coupling transformer includes a primary winding and a secondary winding; the primary winding and the secondary winding respectively include a plurality of coils wound on an iron core, and the control signal at the input end and the electrical signal at the output end are isolated through magnetic field coupling.

[0009] Preferably, the driving circuit further comprises an amplifier, a filter and a shaper; the amplifier, the filter and the shaper are sequentially connected between the isolation coupling transformer and the load.

[0010] Preferably, the control signal comprises a digital signal or an analog signal.

[0011] The embodiment of the utility model provides a driving circuit, which is used in a muscle electrical stimulator, including: two relays, respectively connected to a signal source, for receiving a control signal and controlling the working state of an isolation coupling transformer and a power driver; a power driver, for controlling a load connected to the driving circuit according to the control signal; an isolation coupling transformer connected between the power driver and the load, for electrically isolating the control signal from the load. By introducing an isolation coupling transformer into the driving circuit, the load connected to the driving circuit can be prevented from being affected by electrical interference, thereby improving the safety and reliability of the muscle electrical stimulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic diagram of a driving circuit provided in an embodiment of the utility model;

[0014] Figure 2 A schematic diagram of a single-phase dual-winding isolation coupling transformer provided in an embodiment of the present application;

[0015] Figure 3 A schematic diagram of a muscle electrical stimulator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0018] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0019] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0020] The technical solution provided by the utility model will be described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1 , Figure 1 A schematic diagram of a driving circuit provided in an embodiment of the utility model.

[0022] The driving circuit 10 is applied to a muscle electromagnetic instrument. Figure 1 It can be seen that the drive circuit 10 includes: two relays 101, which are respectively connected to the signal source 20, and are used to receive control signals and control the working states of the isolation coupling transformer 102 and the power driver 103; the power driver 103 is used to control the load 30 connected to the drive circuit 10 according to the control signal; the isolation coupling transformer 102 is connected between the power driver 103 and the load 30, and is used to isolate the electrical signal between the control signal and the load 30.

[0023] The signal source 20 is an external unit for providing a control signal to the driving circuit 10, which is not limited here. Specifically, the control signal may include a digital signal or an analog signal. The relay 101 may be a transistor relay, an NPN relay or an optocoupler driven relay.

[0024] This embodiment can effectively isolate the electrical signal between the control signal and the load by using an isolation coupling transformer in the driving circuit, thereby preventing signal interference and electrical noise from affecting the load, so that when the driving circuit is applied to the muscle electromagnet, the stability and reliability of the output signal of the entire muscle electromagnet is improved.

[0025] In one embodiment, the control ends of the two relays are connected to the signal source, wherein the contact of one relay 101 is connected to the input end of the power driver 103; the contact of the other relay 101 is connected to the input end of the isolation coupling transformer 102, the output end of the power driver 103 is connected to the input end of the isolation coupling transformer 102, and the output end of the isolation coupling transformer 102 is connected to the load 30. This embodiment can accurately control the working state of the power driver and the isolation coupling transformer through the switching action of the relay contacts, thereby achieving precise control of the load.

[0026] In one embodiment, the isolation coupling transformer 102 includes a single-phase dual-winding isolation coupling transformer.

[0027] like Figure 2 As shown, Figure 2 A schematic diagram of a single-phase dual-winding isolation coupling transformer provided in an embodiment of the present application. Figure 2 It can be seen that the single-phase double-winding isolation coupling transformer 102 includes a primary winding 1021 and a secondary winding 1022; the primary winding 1021 and the secondary winding 1022 respectively include a plurality of coils wound on an iron core 1023, and the control signal at the input end and the electrical signal at the output end are isolated through magnetic field coupling.

[0028] Specifically, the primary winding 401 is connected to the contacts of the corresponding relay and the output of the power driver as the input end of the isolation coupling transformer, and the secondary winding 402 is connected to the load as the output end of the isolation coupling transformer. The control signal output by the power driver is coupled from the primary winding to the secondary winding and then output to the load, which can effectively isolate the electrical interference between the drive circuit and the load.

[0029] In one embodiment, the driving circuit 10 further includes an amplifier, a filter and a shaper; the amplifier, the filter and the shaper are sequentially connected between the isolation coupling transformer and the load.

[0030] In this embodiment, the driver is connected to an isolation coupling transformer, which is coupled to the secondary winding to complete the transmission of the control signal. The control signal coupled from the primary winding to the secondary winding is then amplified, filtered, and shaped before being output to the load, thereby improving the accuracy of the signal while avoiding various interferences.

[0031] Through the above analysis, it can be known that the driving circuit provided by the embodiment of the utility model is used in a muscle electrical stimulator, including: two relays, respectively connected to a signal source, for receiving a control signal and controlling the working state of an isolation coupling transformer and a power driver; a power driver, for controlling a load connected to the driving circuit according to the control signal; an isolation coupling transformer connected between the power driver and the load, for electrically isolating the control signal from the load. By introducing an isolation coupling transformer into the driving circuit, the load connected to the driving circuit can be prevented from being affected by electrical interference, thereby improving the safety and reliability of the muscle electrical stimulator.

[0032] like Figure 3 As shown, Figure 3 A schematic diagram of a muscle electrical stimulator provided in an embodiment of the present application, comprising Figure 3 It can be seen that the muscle electromagnetic instrument 40 includes the driving circuit 10 shown in the above embodiment.

[0033] The muscle electrical stimulator uses the driving circuit in the above embodiment and has high reliability and safety in actual use.

[0034] It should be understood that the terms used in the present invention are only for the purpose of describing particular embodiments but are not intended to limit the present invention.

[0035] It should also be understood that the term “and / or” used in the present invention and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0036] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A driving circuit, which is used in a muscle electrical stimulator, comprising: two relays, respectively connected to the signal source, for receiving the control signal and controlling the working states of the isolation coupling transformer and the power driver; A power driver is used to control a load connected to the drive circuit according to the control signal; an isolation coupling transformer is connected between the power driver and the load to isolate electrical interference between the drive circuit and the load.

2. The driving circuit according to claim 1, characterized in that: The control ends of the two relays are connected to the signal source, wherein the contact of one relay is connected to the input end of the power driver; the contact of the other relay is connected to the input end of the isolation coupling transformer, and the output end of the power driver is connected to the input end of the isolation coupling transformer.

3. The driving circuit according to claim 2, characterized in that: The output end of the isolation coupling transformer is connected to a load.

4. The driving circuit according to claim 3, characterized in that: The isolation coupling transformer comprises a single-phase double-winding isolation coupling transformer.

5. The driving circuit according to claim 4, characterized in that: The single-phase double-winding isolation coupling transformer includes a primary winding and a secondary winding; the primary winding and the secondary winding respectively include a plurality of coils wound on an iron core, and the control signal at the input end and the electrical signal at the output end are isolated through magnetic field coupling.

6. The driving circuit according to claim 1, characterized in that: It also includes an amplifier, a filter and a shaper; the amplifier, the filter and the shaper are connected in sequence between the isolation coupling transformer and the load.

7. The driving circuit according to claim 4, characterized in that: The control signal includes a digital signal or an analog signal.

8. A muscle electrical stimulator, characterized in that: The invention comprises a driving circuit as claimed in any one of claims 1 to 7.

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