Electrotherapy device

Abstract

The utility model discloses an electrotherapy device, which comprises a microprocessor, an electrode slice, a heating circuit and a detection circuit, the detection circuit comprises a non-contact infrared sensor module, and the heating circuit is connected with an external power supply and the electrode slice and is used for heating the electrode slice; the non-contact infrared sensor module is used for acquiring an infrared thermal imaging image of a human body part when the electrode plate is attached to the human body part for use; and the microprocessor is connected with the non-contact infrared sensor module and the heating circuit, and is used for controlling the heating circuit to work and monitoring the heating temperature of the electrode plate and the falling condition of the electrode plate according to the infrared thermal imaging image from the non-contact infrared sensor module. Compared with the prior art, the electrotherapy device can detect the temperature of the electrode plate and the falling condition of the electrode plate, the working curative effect of the electrotherapy device is ensured, and the use experience is not affected.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically to an electrotherapy device. Background Technology

[0002] Heated electrode pads are products used in electrotherapy. By heating human skin tissue, they can promote blood circulation, relieve pain, and improve comfort. To avoid burns or other adverse reactions, heated electrode pads typically require temperature feedback monitoring. Current technology usually involves placing a temperature sensor inside the electrode pad to detect its temperature. The temperature information detected by the sensor is transmitted via cable to the processor of the electrotherapy device for processing. However, because the electrode pad has a built-in temperature sensor and requires a cable connection, it occupies a significant amount of space. This causes the soft, thin electrode pad to bulge, which is noticeable when applied to the body, resulting in a poor user experience. Furthermore, besides the user experience, the built-in temperature sensor can only monitor temperature and cannot effectively detect electrode pad detachment, causing inconvenience for both users and hospitals. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electrotherapy device that can detect the temperature of the electrode pads and the detachment of the electrode pads without affecting the user experience.

[0004] To address the aforementioned technical problems, this utility model provides an electrotherapy device, comprising a microprocessor, electrode pads, a heating circuit, and a detection circuit. The detection circuit includes a non-contact infrared sensor module.

[0005] The heating circuit is connected to an external power source and the electrode plates, and is used to heat the electrode plates;

[0006] The non-contact infrared sensor module is used to acquire infrared thermal imaging images of the human body parts when the electrode pads are attached to the human body parts.

[0007] The microprocessor is connected to the non-contact infrared sensor module and the heating circuit, and is used to control the operation of the heating circuit and monitor the heating temperature of the electrode sheet and the detachment of the electrode sheet according to the infrared thermal imaging image from the non-contact infrared sensor module.

[0008] The further technical solution is as follows: the electrotherapy device further includes a sampling circuit, the heating circuit includes an adjustment circuit, a switching tube and a power switch, wherein the input terminal of the switching tube is connected to an external power source through the power switch, the output terminal of the power switch is also connected to the electrode plate, the output terminal of the switching tube is grounded through a fifth resistor, the adjustment circuit is connected to the control terminal and output terminal of the switching tube and the microprocessor, and the sampling circuit is connected between the output terminal of the switching tube and the microprocessor, so that the microprocessor controls the operation of the adjustment circuit according to the current detected by the sampling circuit.

[0009] The further technical solution is as follows: the adjustment circuit includes an operational amplifier, a first resistor and a third resistor. The non-inverting input terminal of the operational amplifier is connected to the microprocessor through the first resistor, and its inverting input terminal is connected to the output terminal of the switching transistor and a fifth resistor through the third resistor. The output terminal of the operational amplifier is connected to the control terminal of the switching transistor.

[0010] A further technical solution is as follows: the adjustment circuit further includes a second resistor, which is connected between the output terminal of the operational amplifier and the control terminal of the switching transistor.

[0011] A further technical solution is as follows: the sampling circuit includes a fourth resistor, one end of which is connected to the output terminal of the switching transistor, and the other end is connected to the microprocessor.

[0012] A further technical solution is as follows: the heating circuit also includes a fuse, which is connected between the external power source and the power switch.

[0013] The further technical solution is as follows: the switching transistor is an NPN transistor, the collector of the NPN transistor serves as the input terminal of the switching transistor, its emitter serves as the output terminal of the switching transistor, and its base serves as the control terminal of the switching transistor.

[0014] A further technical solution is as follows: the detection circuit also includes an alarm module, which is connected to the microprocessor and is used to alert the user when the electrode sheet falls off.

[0015] The further technical solution is as follows: the model of the non-contact infrared sensor module is MLX90640.

[0016] The further technical solution is as follows: the microprocessor is model STM32F407VET6.

[0017] Compared with existing technologies, the electrotherapy device of this invention is equipped with a detection circuit, which includes a non-contact infrared sensor module. When the electrotherapy device is in use, the electrode pads are attached to the human body, and the microprocessor sends a signal to the heating circuit to activate the heating circuit. The non-contact infrared sensor module acquires infrared thermal imaging images of the part of the human body to which the electrode pads are attached. The microprocessor determines whether the electrode pads have fallen off based on whether an object with the shape of the electrode pads is detected in the infrared thermal imaging images. At the same time, the heating temperature of the electrode pads is monitored by the infrared thermal imaging data of the electrode pads attached to the human body. It can be seen that the electrotherapy device of this invention can detect the temperature of the electrode pads and the detachment of the electrode pads, ensuring the therapeutic effect of the electrotherapy device without affecting the user experience. That is, compared with traditional electrotherapy devices that use temperature sensors inside the electrode pads to detect temperature, the electrotherapy device of this invention provides a better user experience when the electrode pads are attached. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the circuit structure of a specific embodiment of the electrotherapy device of this utility model.

[0020] Figure 2 This is a schematic diagram of an infrared thermal imaging image acquired by the non-contact infrared sensor module during the use of the electrotherapy device of this utility model. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1 , Figure 1This is a schematic diagram of the circuit structure of a specific embodiment of the electrotherapy device of this utility model. In the embodiment shown in the figure, the electrotherapy device includes a microprocessor U4, an electrode 40, a heating circuit, and a detection circuit 50. The detection circuit 50 includes a non-contact infrared sensor module U3. The heating circuit is connected to an external power supply VCC1 and the electrode 40 to heat the electrode 40. The non-contact infrared sensor module U3 is used to acquire infrared thermal imaging images of the human body part when the electrode 40 is attached to the human body part. The microprocessor U4 is connected to the non-contact infrared sensor module U3 and the heating circuit to control the operation of the heating circuit and monitor the heating temperature of the electrode 40 and the detachment of the electrode 40 based on the infrared thermal imaging images from the non-contact infrared sensor module U3. Preferably, in this embodiment, the non-contact infrared sensor module U3 can be an MLX90640, and the microprocessor U4 can be an STM32F407VET6. In some other embodiments, other types of non-contact sensors capable of infrared detection and other types of microprocessors can also be used. Based on the above design, the electrotherapy device of this utility model obtains an infrared thermal imaging image of the human body part when the electrode plate 40 is attached to the human body part for heating through the non-contact infrared sensor module U3. The microprocessor U4 can determine whether the electrode plate 40 has fallen off based on whether a shape with the outline of the electrode plate 40 is detected in the infrared thermal imaging image. It can also monitor the heating temperature of the electrode plate 40 through the data at the electrode plate 40 in the infrared thermal imaging image. That is, the microprocessor U4 can find the outline of the electrode plate (e.g., ...) from the infrared thermal imaging image. Figure 2 As shown, Figure 2 (This is a schematic diagram of an infrared thermal imaging image of electrode 40 in an unheated state). If there is a shape resembling the electrode in the infrared thermal imaging image, it is determined that electrode 40 has not detached. The heating state of electrode 40 is tracked in real time based on the infrared thermal imaging data in the infrared thermal imaging image. The heating state of electrode 40 can be detected by the color brightness of the shape resembling the electrode in the infrared thermal imaging image. It can be seen that the electrotherapy device of this utility model can detect the temperature of electrode 40 and the detachment of electrode 40, ensuring the working efficacy of the electrotherapy device. Compared with the traditional electrotherapy device that sets a temperature sensor in electrode 40 to detect temperature, the electrode 40 of the electrotherapy device of this utility model has a better user experience when it is attached.

[0023] In some embodiments, the electrotherapy device further includes a sampling circuit 30. The heating circuit includes an adjustment circuit 21, a switching transistor Q1, and a power switch S. The input terminal of the switching transistor Q1 is connected to an external power supply VCC1 via the power switch S. The output terminal of the power switch S is also connected to the electrode plate 40. The output terminal of the switching transistor Q1 is grounded through a fifth resistor R5. The adjustment circuit 21 is connected to the control terminal and output terminal of the switching transistor Q1 and the microprocessor U4. The sampling circuit 30 is connected between the output terminal of the switching transistor Q1 and the microprocessor U4, so that the microprocessor U4 controls the operation of the adjustment circuit 21 according to the current detected by the sampling circuit 30, thereby adjusting the heating temperature of the electrode plate 40. Preferably, the power switch S can be a socket switch, etc. When the electrotherapy device is in use, the power switch S is in a closed state; that is, if it is a socket switch, the socket switch is connected to the external power supply VCC1.

[0024] Specifically, such as Figure 1 As shown, the adjustment circuit 21 includes an operational amplifier U1A, a first resistor R1, a third resistor R3, and a second resistor R2. The non-inverting input of the operational amplifier U1A is connected to the DAC pin of the microprocessor U4 through the first resistor R1, and its inverting input is connected to the output of the switching transistor Q1 and a fifth resistor R5 through the third resistor R3. The output of the operational amplifier U1A is connected to the control terminal of the switching transistor Q1 through the second resistor R2. Understandably, in this invention, the electrode plate 40 is composed of a high-resistivity heating material with a resistance typically of 10-20Ω. The heat generation calculation formula is Q = Pt, where P is the power of the heating material and t is the working time. From the formula, it can be seen that the heat generation of the electrode plate 40 is determined by P and t, and P = I... 2 Given that the resistance of the heating electrode 40 is generally stable, the heat generation can be controlled simply by changing the value of I (the current flowing through the electrode 40). Based on this design, the microprocessor U4 outputs a voltage to the operational amplifier U1A through the DAC pin. The operational amplifier U1A, in conjunction with the switching transistor Q1, controls the current flowing through the fifth resistor R5 at the output of the switching transistor Q1. Since the current flowing through the electrode 40 is the same as the current flowing through the fifth resistor R5, the heating temperature of the electrode 40 can be controlled by controlling the output current at the output of the switching transistor Q1. Furthermore, a closed-loop feedback is formed by the feedback of the actual output current flowing through the fifth resistor R5.

[0025] The following describes the specific working principle of the heating circuit using a practical example: If the required operating current for electrode 40 is 1A and the resistance of the fifth resistor R5 is 1Ω, the working principle is as follows: When the microprocessor U4 outputs 1V to the non-inverting input of operational amplifier U1A, according to the virtual short principle of operational amplifiers, the voltage at the inverting input of operational amplifier U1A is also 1V. Since R5 is connected to the inverting input of operational amplifier U1A, the voltage is also fixed at 1V. The current flowing through R5 is I = U / R = 1V / 1Ω = 1A. Since the current flowing through R5 and the current flowing through electrode 40 are the same, the operating current of electrode 40 is also 1A. If the heating temperature of electrode 40 in the infrared thermal imaging image exceeds the preset temperature, then... When the current in electrode 40 increases, the voltage at the inverting input of operational amplifier U1A also increases accordingly. To adjust the output current, according to the virtual short principle, microprocessor U4 reduces the voltage output to the non-inverting input of operational amplifier U1A. As a result, the output voltage of U1A also decreases, the voltage at the base of switching transistor Q1 decreases, and the current flowing through switching transistor Q1 decreases. The voltage at R5 also decreases until it stops at 1V, thus adjusting the current flowing through electrode 40 to 1A to maintain balance. Similarly, when the heating temperature of electrode 40 in the infrared thermal imaging image is detected to be lower than the preset temperature, the output voltage at the output of U1A can be adjusted through feedback, thereby adjusting the current flowing through electrode 40 to adjust the heating temperature of electrode 40.

[0026] Preferably, in some embodiments, the sampling circuit 30 includes a fourth resistor R4, one end of which is connected to the output terminal of the switching transistor Q1, and the other end is connected to the ADC pin of the microprocessor U4. Based on the above design, the ADC pin of the microprocessor U4 constantly samples the current flowing through the fifth resistor R5. If no current is sampled under normal operating conditions, it can be determined that the socket switch S has poor contact, resulting in no current flowing in, and the user can be prompted to re-plug the socket.

[0027] Continue to refer to Figure 1 In this embodiment, the switching transistor Q1 is an NPN transistor. The collector of the NPN transistor serves as the input terminal of the switching transistor Q1 and is connected to the external power supply VCC1 through the power switch S. The emitter of the NPN transistor serves as the output terminal of the switching transistor Q1 and is grounded through the fifth resistor R5. It is connected to the inverting input terminal of the operational amplifier U1A through the third resistor R3 and to the ADC pin of the microprocessor U4 through the fourth resistor R4. The base of the NPN transistor serves as the control terminal of the switching transistor Q1 and is connected to the output terminal of the operational amplifier U1A through the first resistor R1.

[0028] Furthermore, in some embodiments, the heating circuit further includes a fuse F1, which is connected between the external power supply VCC1 and the power switch S. In this embodiment, the fuse F1 is a resettable fuse. When the current supplied by the external power supply VCC1 is greater than the operating current of the fuse F1, the resettable fuse F1 trips to protect the device from damage. When the current decreases, the fuse F1 returns to normal and can be used normally again.

[0029] Understandably, in some other embodiments, the detection circuit 50 may further include an alarm module connected to the microprocessor U4, used to alert the user when the electrode pad 40 detaches. The alarm module may include a buzzer and / or an indicator light, which alerts the user via sound and / or light when the shape of the electrode pad 40 is not detected in the infrared thermal imaging image during use of the electrotherapy device, and may also alert the user when the power switch S has poor contact.

[0030] In summary, the electrode pads in this electrotherapy device do not require built-in temperature sensors, resulting in a better user experience. Specifically, it uses a non-contact infrared sensor module to obtain infrared thermal images of the body part where the electrode pads are applied for heating. The microprocessor determines whether the electrode pads have detached based on whether an object resembling the electrode pads is detected in the infrared thermal image. It can also monitor the heating temperature of the electrode pads using data from the infrared thermal image. In other words, the microprocessor can locate the electrode pads in the infrared thermal image; if an object resembling the electrode pads is found, the electrode pads are considered intact; otherwise, they are considered detached, and an alarm module can provide a notification. Furthermore, the microprocessor can track the heating status of the electrode pads in real time based on the infrared thermal imaging data. When a deviation from the preset temperature is detected, the sampling circuit feeds back to the microprocessor, causing it to adjust the output voltage and the output of the switching transistor, thereby changing the current flowing through the electrode pads to stabilize the temperature at the preset level and ensure the therapeutic effect of the electrotherapy device.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electrotherapy device, characterized by, The electrotherapy device comprises a microprocessor, electrode pads, a heating circuit and a detection circuit, wherein the detection circuit comprises a non-contact infrared sensor module, the heating circuit is connected with an external power supply and the electrode pads, and is used for heating the electrode pads; the non-contact infrared sensor module is used for acquiring an infrared thermal imaging image of a human body part when the electrode pads are attached to the human body part; the microprocessor is connected with the non-contact infrared sensor module and the heating circuit, and is used for controlling the heating circuit to work, and monitoring the heating temperature of the electrode pads and the peeling of the electrode pads according to the infrared thermal imaging image from the non-contact infrared sensor module.

2. The electrotherapy device of claim 1, wherein, The electrotherapy device further comprises a sampling circuit, the heating circuit comprises a regulating circuit, a switching tube and a power switch, wherein the input end of the switching tube is connected with the external power supply through the power switch, the output end of the power switch is further connected with the electrode pads, the output end of the switching tube is connected with the ground through a fifth resistor, the regulating circuit is connected with the control end and the output end of the switching tube and the microprocessor, and the sampling circuit is connected between the output end of the switching tube and the microprocessor, so that the microprocessor controls the working of the regulating circuit according to the current detected by the sampling circuit.

3. The electrotherapy device of claim 2, wherein the at least one electrode is configured to deliver the electrical stimulation to the user's body in a manner that is substantially uniform across the user's body. The regulating circuit comprises an operational amplifier, a first resistor and a third resistor, the non-inverting input end of the operational amplifier is connected with the microprocessor through the first resistor, the inverting input end of the operational amplifier is connected with the output end of the switching tube and the fifth resistor through the third resistor, and the output end of the operational amplifier is connected with the control end of the switching tube.

4. The electrotherapy device of claim 3, wherein the at least one electrode is configured to deliver the electrical stimulation to the user's body in a manner that is substantially uniform across the user's body. The regulating circuit further comprises a second resistor, and the second resistor is connected between the output end of the operational amplifier and the control end of the switching tube.

5. The electrotherapy device of claim 2, wherein the at least one electrode is a conductive fabric. The sampling circuit comprises a fourth resistor, one end of the fourth resistor is connected with the output end of the switching tube, and the other end of the fourth resistor is connected with the microprocessor.

6. The electrotherapy device of claim 2, wherein the at least one electrode is a conductive fabric. The heating circuit further comprises a fuse, and the fuse is connected between the external power supply and the power switch.

7. The electrotherapy device of claim 2, wherein the at least one electrode is configured to deliver a current to the user's body in a direction that is substantially parallel to the user's skin. The switching tube is an NPN triode, the collector of the NPN triode is used as the input end of the switching tube, the emitter of the NPN triode is used as the output end of the switching tube, and the base of the NPN triode is used as the control end of the switching tube.

8. The electrotherapy device of claim 1, wherein, The detection circuit further comprises an alarm module, and the alarm module is connected with the microprocessor and is used for prompting a user when the electrode pads are peeled off.

9. The electrotherapy device of claim 1, wherein, The model of the non-contact infrared sensor module is MLX90640.

10. The electrotherapy device of claim 1, wherein, The model of the microprocessor is STM32F407VET6.

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