阅读说明：本技术 具有安全保护功能的人体电疗装置 (Human body electrotherapy device with safety protection function ) 是由 荀龙德 张传海 季索远 于 2019-03-01 设计创作，主要内容包括：本发明提供具有安全保护功能的人体电疗装置,包括：输出电路,以及控制输出的控制装置；输出电路上设有反馈装置,反馈装置将加载在人体的电压及输出到人体的电流,实时反馈给控制装置,作为实时的监控；在反馈装置上设有隔离装置,监控输出电流/电压时,隔离装置减小反馈装置自有的漏电流特性对输出的影响,提高输出的精度。本发明主要解决了加载人体治疗电疗时的硬件保护,防止设备故障时危及人体安全。(The present invention provides an electrotherapy apparatus for human body having safety protection function, comprising: an output circuit, and a control device for controlling the output; the output circuit is provided with a feedback device, and the feedback device feeds back the voltage loaded on the human body and the current output to the human body to the control device in real time to be used as real-time monitoring; the isolation device is arranged on the feedback device, and when the output current/voltage is monitored, the isolation device reduces the influence of the leakage current characteristic of the feedback device on the output and improves the output precision. The invention mainly solves the problem of hardware protection when human body treatment electrotherapy is loaded, and prevents the safety of human body from being endangered when equipment fails.)

1. A human body electrotherapy device having a safety protection function, comprising:

an output circuit, and a control device for controlling the output; the device is characterized in that the output circuit is provided with a feedback device, and the feedback device feeds back the voltage loaded on the human body and/or the current output to the human body to the control device in real time to be used as real-time monitoring; the feedback device is provided with an isolating device, and when the output is monitored, the isolating device reduces the influence of the leakage current characteristic of the feedback device on the output and improves the output precision.

2. The human body electrotherapy device with safety protection function according to claim 1, wherein said output circuit is further provided with an output protection device for performing hardware current limiting on the current and/or voltage outputted to the human body and/or performing clamp limitation on the voltage applied to the human body.

3. The electrotherapy device with safety protection function according to claim 2, wherein said output protection device is a current-limiting tube and/or a pressure-limiting tube.

4. The human body electrotherapy device with safety protection function according to claim 1, wherein when said output circuits are multiplexed, said control means polls and monitors each output circuit through a multi-channel selection means.

5. The human body electrotherapy device with safety protection function according to claim 4, wherein said multi-channel selection device is a multi-channel analog switch.

6. The human body electrotherapy device with safety protection function according to claim 4, wherein an isolation device is arranged between said feedback device and said multi-channel selection device.

7. The human body electrotherapy device with safety protection function according to claim 1, wherein said isolation means utilizes an operational amplifier to achieve leakage current isolation.

8. The human body electrotherapy device with safety protection function according to claim 1, wherein said control device subtracts self leakage current induced by said output protection device from feedback current when calculating said output current.

Technical Field

The invention relates to the field of medical instruments, in particular to a human body electrotherapy device with a safety protection function.

Background

Electrotherapy is a new treatment modality that has emerged in recent years. That is, micro-current or pulse voltage is directly applied to human body to obtain a certain therapeutic effect, and the method is a method for preventing and treating diseases by applying electric energy to human body. The human body is a complex electrical conductor with different areas having different impedances and current or voltage tolerance limits. Therefore, safety and side effects during electrotherapy are the primary points that should be addressed.

In addition to containing a large amount of moisture, the human body contains many conductive electrolytes and non-conductive dielectrics, so that the human body is actually a complex conductor with both resistance and capacitance properties, which is the material basis for electrotherapy. The electric energy acts on human body to cause in vivo physicochemical reaction, and influences the functions of tissues and organs through nerve-body fluid action, thereby achieving the purposes of eliminating pathogeny, regulating functions, improving metabolism, enhancing immunity, and promoting the repair and regeneration of damaged tissues. The body responds differently to different properties of current/voltage, and the therapeutic mechanism is different. The same current/voltage causes different responses of human bodies when the using method and the dosage are different. In addition, different organs and tissues, different functional states and pathological changes of the human body have different responses to current/voltage.

Electrotherapy, like other treatments, has specific side effects and complications. Common complications are mainly headache, nausea, vomiting and reversible memory decline. The incidence of memory decline is high and foreign studies have found that at least 1/3 patients show significant memory decline after receiving electrotherapy. However, it is generally accepted that the effects of electroconvulsive therapy on memory are limited and often only temporary, and clinically these symptoms generally improve themselves without treatment after treatment.

Modern electrotherapy has not only the above side effects, but also a few disadvantages, such as that a large current is applied to certain parts of the human body for a short time due to the impedance change of the human body, which may cause irreversible damage or pain to the human body. Practice proves that the stable micro-current is relatively safe for human bodies. Therefore, how to ensure that the electrotherapy device smoothly outputs controllable micro-current in the electrotherapy process is a fundamental measure for ensuring the safety and comfort of electrotherapy.

But it is very difficult to do this in an actual electrotherapy device. Firstly, the output characteristics of the electrotherapy device are considered, the voltage loaded on the human body and the current of the human body are protected, and the problem that the voltage and the current exceeding the safety of the human body are output when the treatment device has abnormal faults is solved. Secondly, many electrotherapy devices currently have multiple channels, which apply current to different body regions, so the corresponding protection device should also monitor and protect the current and voltage of the multiple channels, which greatly increases the technical complexity and cost of the protection device.

Disclosure of Invention

The present invention is directed to provide a human body electrotherapy apparatus with safety protection function based on the above problems, and solves the problems of poor treatment effect, uncomfortable feeling to patients during treatment, and various side effects caused by unstable and inaccurate output of the current human body electrotherapy apparatus.

In order to achieve the above object, the present invention provides an electrotherapy apparatus for a human body having a safety protection function, comprising:

an output circuit, and a control device for controlling the output; the output circuit is provided with a feedback device, and the feedback device feeds back the voltage loaded on the human body and the current output to the human body to the control device in real time to be used as real-time monitoring; the isolation device is arranged on the feedback device, and when the output is monitored, the isolation device reduces the influence of the leakage current characteristic of the feedback device on the output and improves the output precision.

The output circuit is also provided with an output protection device for carrying out hardware current limiting on the current and/or voltage output to the human body and/or carrying out clamping limitation on the voltage loaded on the human body. The output protection device can be a flow limiting pipe and/or a pressure limiting pipe. When the output circuits have multiple paths, the control device polls and monitors each output circuit through a multi-channel selection device. The multi-channel selection device is a multi-channel analog selection switch. An isolation device is arranged between the feedback device and the multi-channel selection device, and the isolation device is used for preventing the feedback signal from causing errors due to self leakage current of a chip after the feedback signal passes through the multi-channel switch. The isolation device realizes leakage current isolation by using an operational amplifier. The control device deducts self leakage current introduced by the isolation device in the feedback current when calculating the output current.

The invention realizes a simple and reliable hardware protection circuit and a method which can be used for the treatment current and/or voltage of the human body, and the circuit and the method are used for protecting the human body, so that the treatment current and/or voltage acted on the human body are protected and controlled by hardware, and the safety of treatment is ensured. The invention mainly solves the problem of hardware protection when human body treatment current and/or voltage are loaded, and prevents the safety of the human body from being endangered when equipment fails.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a block circuit diagram of the present invention;

FIG. 2 is a block circuit diagram of one embodiment of the present invention;

FIG. 3 is a circuit diagram of an isolation device of the present invention;

FIG. 4 is a circuit diagram of an output protection device of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Aiming at the problems of uncomfortable treatment and unsafe treatment caused by insufficient electrotherapy devices and incapability of accurately outputting treatment current in the prior art, the invention provides a feedback device arranged on an output circuit, so that the output current and voltage values are monitored through the feedback circuit, and a control device adjusts the output in real time to ensure accurate and safe output. Meanwhile, the output protection device is arranged at the output end, so that the current and voltage limiting on hardware is realized, and the output safety is further ensured. Meanwhile, the feedback device is more accurate in feedback by removing leakage current by installing the isolation device on the feedback device, and then the control device can better control output according to parameters provided by the feedback device.

Because there are many output ends in the electrotherapy device of the human body usually, the invention has adopted the multi-channel selection device to carry on the polling monitoring to the multi-channel output, thus has greatly simplified the circuit design, has saved the port resource.

The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.

Referring to fig. 1, fig. 1 is a circuit block diagram of the present invention.

The human body electrotherapy device shown in fig. 1 is mainly composed of two parts, an output circuit and a control device (not shown). The output circuit outputs a current and/or a voltage. The control device controls the magnitude of the output current or voltage. The invention adds a feedback device on the output circuit, the feedback device can be any current and/or voltage feedback circuit or a measuring circuit, and measures and feeds back real-time circuit parameters such as voltage or current at the connected output circuit end, and feeds back the real-time circuit parameters to the control device. The control device may monitor and implement the adjustment circuit output based on these circuit parameters. An isolating device is also connected between the feedback device and the output circuit. The isolation device has the function of solving the problem that the leakage current characteristic of the feedback device affects the output when monitoring the output, and improving the output precision. In addition, an output protection device is arranged at the output end of the output circuit. The function is to carry out hardware current limiting on current and/or voltage output to a human body and carry out clamping limitation on voltage loaded on the human body. The protection device can use a current limiting tube, a voltage limiting tube or a special chip, and a circuit designer can select the type design according to the magnitude of current and voltage to be protected and the output precision. It can be seen from fig. 1 that a series of protective measures consisting of a feedback device, an isolation device and an output protection device realize stable and accurate control of electrotherapy output.

Referring to fig. 2, fig. 2 is a circuit block diagram of an embodiment of the invention. In the embodiment of FIG. 2, the electrotherapy device has several outputs, only two of which are shown. The device needs a multi-channel selection device to save port resources. The multi-channel selection device is arranged between the control device and the multi-channel output, and monitoring is realized by polling each channel of output. If the channels are few and the resources are sufficient, the form of multi-channel selection may not be needed. The multichannel selection can be realized by adopting discrete devices such as MOS (metal oxide semiconductor) tubes, triodes or other switch tubes, and also can be realized by using a multichannel analog switch. The selection can be freely decided by engineers.

Referring to fig. 3, fig. 3 is a circuit diagram of an isolation device according to the present invention. The isolation device in fig. 3 is an operational amplifier, the anode is connected to the feedback end of the output circuit, and the cathode is connected to the output end of the operational amplifier. The output end of the feedback device is connected with the feedback device. The output circuit and the feedback device are connected in such a way that the leakage current of the feedback device is isolated from the output current of the output circuit, thereby avoiding the feedback device from influencing the output current.

Referring to fig. 4 again, fig. 4 is a circuit diagram of the output protection device of the present invention. And an output protection device. The function is to carry out hardware current limiting on the current output to the human body and carry out clamping limitation on the voltage loaded on the human body. The protection device can use a current limiting tube, a voltage limiting tube or a special chip, and a circuit designer can select the type design according to the magnitude of current and voltage to be protected and the output precision. In the embodiment of fig. 4, the output protection device is a diode, the anode of which is grounded and the cathode of which is connected with the output circuit, and when uncontrollable static electricity or pulse voltage is encountered, the output protection device is directly broken down and grounded, so that larger current \ voltage is prevented from being directly output. The output protection device also comprises a hardware current limiting pipe arranged on the output circuit.

It can be seen from fig. 4 that the output protection device itself also has leakage current, typically a few to a few tens of microamperes. When outputting the protection microampere-level output current, errors need to be considered. The formula: the actual feedback current is the feedback terminal current-leakage current. The accuracy of the output current can be ensured through a software compensation mode according to the formula.

In some embodiments, the hardware protection circuit may be used in the following two cases: protecting the voltage and current loaded on the human body without exceeding the upper limit of a design value; the voltage and current loaded on the human body are protected and do not exceed the safe voltage and current of the human body.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.