Meridian flow high frequency stimulator with power feedback

Abstract

The present application belongs to the technical field of medical apparatus and instruments, and particularly relates to a meridian high-frequency stimulation instrument with power feedback, mainly comprising a PID controller, a driving module, a high-frequency oscillation module, a PVDF measurement film assembly, a signal conditioning module and the like. The desired treatment power is input into the therapeutic instrument, and the difference between the actual power and the desired treatment power is input into the PID controller. The controller outputs a duty cycle signal to the driving module, which drives the high-frequency oscillation module to work. The PVDF measurement assembly measures the output power of the oscillation module, and the actual power signal is reflected after calibration by the signal conditioning module, serving as a feedback signal to realize closed-loop control of the output power. The treatment process is more safe and controllable, and the skin is prevented from being excessively stimulated.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a meridional high-frequency stimulator with power feedback. Background Technology

[0002] The Meridian Flow Low-Frequency Therapy Device, as a non-invasive physical therapy device, has wide applications in the medical field. This device stimulates human tissues with low-frequency currents or vibrations (typically 1-1 kHz) to achieve analgesia, promote blood circulation, relieve muscle spasms, and promote inflammation absorption. In clinical practice, low-frequency therapy devices are commonly used to treat various musculoskeletal disorders such as cervical spondylosis, lumbar disc herniation, frozen shoulder, lumbar muscle strain, and acute lumbar sprain.

[0003] In recent years, low-frequency electrotherapy technology has been further combined with other physical therapy methods to form more complex treatment systems. For example, the ultrasonic electroconductive targeted drug delivery therapy device combines low-frequency electrical technology, ultrasound, and electroporation technology to promote targeted drug penetration through the skin to the lesion, achieving non-invasive targeted drug delivery and significantly improving drug utilization. These devices are used in various departments such as rehabilitation, orthopedics, gastroenterology, pediatrics, and gynecology, meeting the treatment needs of different diseases. Although low-frequency therapy devices have achieved certain results in clinical applications, current products on the market still have problems such as uncontrollable stimulation intensity and poor safety.

[0004] To address the above issues, this paper proposes a meridional high-frequency stimulator with power feedback. By directly applying the feedback measurement membrane to the human body, the actual measured stimulation power is used as the feedback signal for the controller, thereby achieving closed-loop control of the stimulation intensity and improving the safety of treatment. Summary of the Invention

[0005] The purpose of this invention is to solve the problems mentioned in the background art and to provide a meridional high-frequency stimulator with power feedback. It has the function of adaptive adjustment of stimulation power.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0007] A high-frequency stimulator with power feedback for meridional flow mainly includes: a PID controller (1), a drive module (2), a high-frequency oscillation module (3), a PVDF measurement membrane assembly (4), a signal conditioning module (5), etc.

[0008] The PID controller (1) inputs the difference between the desired power and the actual power, and outputs a control signal with a certain duty cycle. The control signal is input to the drive module (2), which drives the high-frequency oscillation module (3) to work and apply high-frequency stimulation to the human body. The PVDF measuring membrane assembly (4) is attached to the high-frequency oscillation module (3). The PVDF measuring membrane assembly (4) outputs sinusoidal AC signals of different amplitudes according to the different vibration intensities of the high-frequency oscillation module (3). After being processed by the signal conditioning module (5), the sinusoidal AC signals are converted into the actual output power of the high-frequency oscillation module (3) and used as the feedback signal of the PID controller (1).

[0009] The drive module (2) includes a high-frequency choke (21), a switching transistor (22), a compensation capacitor (23), a resonant capacitor (24), a resonant inductor (25), a filter capacitor (26), an isolation transformer (27), and a tuning inductor (28). One end of the high-frequency choke (21) is connected to the drive power supply VDD, and the other end is connected to the upper end of the switching transistor (22). The lower end of the switching transistor (22) is connected to GND. The compensation capacitor (23) is connected in parallel across the two ends of the switching transistor (22). One end of the resonant capacitor (24) is connected to the upper end of the switching transistor (22), and the other end is connected to one end of the resonant inductor (25). The other end of the resonant inductor (25) is connected to the filter capacitor (26), and the other end of the filter capacitor (26) is connected to GND. One side of the isolation transformer (27) is connected in parallel with the filter capacitor (26), and the other end is connected in parallel with the tuning inductor (28) before being output to the high-frequency oscillation module (3).

[0010] The high-frequency oscillation module (3) includes a high electrode (31), a flexible dielectric (32), a low electrode (33), a coupling layer (34), a low electrode pin (35), and a high electrode pin (36). The high electrode (31), flexible dielectric (32), low electrode (33), and coupling layer (34) are connected in sequence. The low electrode pin (35) is connected to the low electrode (33), and the high electrode pin (36) is connected to the high electrode (31). The low electrode pin (35) and the high electrode pin (36) are respectively connected to the two ends of the tuning inductor (28) in the drive module (2).

[0011] The PVDF measuring membrane assembly (4) comprises a high-position silver plating layer (41), a PVDF membrane (42), a low-position silver plating layer (43), and an insulating layer (44) connected in sequence. The high-position silver plating layer (41) is fixedly connected to the coupling layer (34), and the insulating layer (44) is in contact with the human body.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This invention creatively designs a high-frequency oscillation module capable of generating high-frequency vibrations. The module generates high-frequency stimulation by passing an alternating current of a certain frequency through the high-position electrode and the low-position electrode. The two electrodes attract and repel each other under electrostatic forces, thereby compressing a flexible dielectric to provide therapeutic effects to the human body. Compared with traditional piezoelectric ceramic vibration methods, this invention can achieve stimulation at different frequencies, resulting in a wider therapeutic range.

[0014] 2. This invention creatively designs a flexible PVDF measuring membrane assembly capable of measuring the output power of a high-frequency oscillation module. By inputting the error between the expected and measured values ​​into a controller, closed-loop control of the high-frequency oscillation module's output power can be achieved. Compared with traditional open-loop piezoelectric ceramic vibration schemes, it offers better safety performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or existing methods and experiments, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a general block diagram of a meridional high-frequency stimulator with power feedback according to the present invention;

[0017] Figure 2 This is the schematic diagram of the driver module;

[0018] Figure 3 This is a schematic diagram of the high-frequency oscillation module and the PVDF measurement membrane assembly.

[0019] The labels in the figure are as follows: PID controller (1), drive module (2), high-frequency choke (21), switching transistor (22), compensation capacitor (23), resonant capacitor (24), resonant inductor (25), filter capacitor (26), isolation transformer (27), tuning inductor (28), high-frequency oscillation module (3), high electrode (31), flexible dielectric (32), low electrode (33), coupling layer (34), low electrode pin (35), high electrode pin (36), PVDF measurement membrane assembly (4), high silver plating layer (41), PVDF film (42), low silver plating layer (43), insulating layer (44), signal conditioning module (5). Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] This invention discloses a meridional high-frequency stimulator with power feedback, which mainly includes: a PID controller (1), a drive module (2), a high-frequency oscillation module (3), a PVDF measurement membrane assembly (4), a signal conditioning module (5), etc.

[0023] The PID controller (1) inputs the difference between the desired power and the actual power, and outputs a control signal with a certain duty cycle. The control signal is input to the drive module (2), which drives the high-frequency oscillation module (3) to work and apply high-frequency stimulation to the human body. The PVDF measuring membrane assembly (4) is attached to the high-frequency oscillation module (3). The PVDF measuring membrane assembly (4) outputs sinusoidal AC signals of different amplitudes according to the different vibration intensities of the high-frequency oscillation module (3). After being processed by the signal conditioning module (5), the sinusoidal AC signals are converted into the actual output power of the high-frequency oscillation module (3) and used as the feedback signal of the PID controller (1).

[0024] The drive module (2) includes a high-frequency choke (21), a switching transistor (22), a compensation capacitor (23), a resonant capacitor (24), a resonant inductor (25), a filter capacitor (26), an isolation transformer (27), and a tuning inductor (28). One end of the high-frequency choke (21) is connected to the drive power supply VDD, and the other end is connected to the upper end of the switching transistor (22). The lower end of the switching transistor (22) is connected to GND. The compensation capacitor (23) is connected in parallel across the two ends of the switching transistor (22). One end of the resonant capacitor (24) is connected to the upper end of the switching transistor (22), and the other end is connected to one end of the resonant inductor (25). The other end of the resonant inductor (25) is connected to the filter capacitor (26), and the other end of the filter capacitor (26) is connected to GND. One side of the isolation transformer (27) is connected in parallel with the filter capacitor (26), and the other end is connected in parallel with the tuning inductor (28) before being output to the high-frequency oscillation module (3).

[0025] The high-frequency oscillation module (3) includes a high electrode (31), a flexible dielectric (32), a low electrode (33), a coupling layer (34), a low electrode pin (35), and a high electrode pin (36). The high electrode (31), flexible dielectric (32), low electrode (33), and coupling layer (34) are connected in sequence. The low electrode pin (35) is connected to the low electrode (33), and the high electrode pin (36) is connected to the high electrode (31). The low electrode pin (35) and the high electrode pin (36) are respectively connected to the two ends of the tuning inductor (28) in the drive module (2).

[0026] The PVDF measuring membrane assembly (4) comprises a high-position silver plating layer (41), a PVDF membrane (42), a low-position silver plating layer (43), and an insulating layer (44) connected in sequence. The high-position silver plating layer (41) is fixedly connected to the coupling layer (34), and the insulating layer (44) is in contact with the human body.

[0027] When in use, the desired therapeutic power is input to the therapeutic instrument. The difference between the desired therapeutic power and the actual power is input to the PID controller (1). After calculation, the PID controller (1) outputs a signal with a certain duty cycle to the drive module (2) to drive the switch (22) to perform high-frequency switching. The function of the compensation capacitor (23) is to delay voltage. When the switch (22) is turned off, the voltage across the switch (22) will not suddenly increase, but will first maintain the voltage across the compensation capacitor (23). After the current of the switch (22) drops to zero, it will start to rise. The high-frequency choke (21) serves to prevent high-frequency short circuits and provide constant DC. The resonant capacitor (24) and the resonant inductor (25) form an LC oscillation circuit. After the voltage across the compensation capacitor (23) is transformed by the LC network, a sinusoidal voltage with the same frequency as the excitation signal is obtained. After the sinusoidal voltage is filtered by the filter capacitor (26) to remove high-order harmonics, it is input to the isolation transformer (27). After isolation, it is output to the lower electrode pin (35) and the higher electrode pin (36) in the high-frequency oscillation module (3). This generates a high-frequency voltage change in the high-position electrode (31) and the low-position electrode (33). After being energized, the high-position electrode (31) and the low-position electrode (33) are subjected to high-frequency compression of the flexible dielectric (32) under the action of electromagnetic force, causing the flexible dielectric (32) to generate high-frequency vibration stimulation. The high-frequency vibration stimulation is transmitted to the PVDF film (42) through the coupling layer (34). After the PVDF film (42) generates an electrical signal of the same frequency, it is output through the low-position silver plating layer (43) and the high-position silver plating layer (41). The signal is converted into the actual output power of the high-frequency oscillation module (3) after passing through the signal conditioning module (5), and thus serves as the feedback signal for the output power to realize closed-loop control of the output power.

Claims

1. A meridional high-frequency stimulator with power feedback, characterized in that, Mainly includes: PID controller (1), drive module (2), high-frequency oscillation module (3), PVDF measurement membrane assembly (4), signal conditioning module (5), etc.; The PID controller (1) inputs the difference between the desired power and the actual power, and outputs a control signal with a certain duty cycle. The control signal is input to the drive module (2), which drives the high-frequency oscillation module (3) to work and apply high-frequency stimulation to the human body. The PVDF measuring membrane assembly (4) is attached to the high-frequency oscillation module (3). The PVDF measuring membrane assembly (4) outputs sinusoidal AC signals of different amplitudes according to the different vibration intensities of the high-frequency oscillation module (3). After being processed by the signal conditioning module (5), the sinusoidal AC signals are converted into the actual output power of the high-frequency oscillation module (3) and used as the feedback signal of the PID controller (1).

2. The meridional high-frequency stimulator with power feedback according to claim 1, characterized in that, The drive module (2) includes a high-frequency choke (21), a switching transistor (22), a compensation capacitor (23), a resonant capacitor (24), a resonant inductor (25), a filter capacitor (26), an isolation transformer (27), and a tuning inductor (28). One end of the high-frequency choke (21) is connected to the drive power supply VDD, and the other end is connected to the upper end of the switching transistor (22). The lower end of the switching transistor (22) is connected to GND. The compensation capacitor (23) is connected in parallel across the two ends of the switching transistor (22). One end of the resonant capacitor (24) is connected to the upper end of the switching transistor (22), and the other end is connected to one end of the resonant inductor (25). The other end of the resonant inductor (25) is connected to the filter capacitor (26), and the other end of the filter capacitor (26) is connected to GND. One side of the isolation transformer (27) is connected in parallel with the filter capacitor (26), and the other end is connected in parallel with the tuning inductor (28) before being output to the high-frequency oscillation module (3).

3. A meridional high-frequency stimulator with power feedback according to claim 1, characterized in that, The high-frequency oscillation module (3) includes a high electrode (31), a flexible dielectric (32), a low electrode (33), a coupling layer (34), a low electrode pin (35), and a high electrode pin (36). The high electrode (31), flexible dielectric (32), low electrode (33), and coupling layer (34) are connected in sequence. The low electrode pin (35) is connected to the low electrode (33), and the high electrode pin (36) is connected to the high electrode (31). The low electrode pin (35) and the high electrode pin (36) are respectively connected to the two ends of the tuning inductor (28) in the drive module (2).

4. A meridional high-frequency stimulator with power feedback according to claim 1, characterized in that, The PVDF measuring membrane assembly (4) comprises a high-position silver plating layer (41), a PVDF membrane (42), a low-position silver plating layer (43), and an insulating layer (44) connected in sequence. The high-position silver plating layer (41) is fixedly connected to the coupling layer (34), and the insulating layer (44) is in contact with the human body.

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