A human limb impedance measurement and electrotherapy device

Abstract

The present invention relates to a human limb impedance measurement and electrotherapy device, which includes a main control module, an impedance measurement module, a therapy module, a therapy evaluation unit, a mode switching module, an output voltage and therapy current monitoring circuit, an adaptive control unit, a channel selection module and a sensor electrode array. This device can achieve wide-range, high-precision, multi-frequency point and multi-channel human limb impedance measurement, accurately locate human limb acupoints by comparing the relative impedance magnitudes of each point in the measurement area, and can be converted into a therapy mode to perform electrotherapy at the located acupoint points to achieve precise therapy; during the therapy process, it tracks the therapy progress in real time and ensures the best therapy effect through adaptive control; and after the therapy is completed, it measures the impedance data of the therapy area again, and evaluates the therapy effect by comparing the impedance values before and after the therapy area; the upper computer supporting the device has perfect functions and simple operation, and can quickly locate the lesion points through color assignment display processing.

Description

Technical Field

[0001] The present invention belongs to the technical field of bioimpedance measurement, and particularly relates to a device for measuring human limb impedance and electrotherapy. Background Art

[0002] As a non-invasive detection technology, human bioelectrical impedance measurement technology has extensive applications in the fields of clinical and biomedical. Bioimpedance is a physical parameter reflecting the electrical properties of human cells, tissues, organs, and the entire biological body. Limb impedance parameters are important reference diagnostic indicators for analyzing human diseases. Traditional Chinese medicine theory shows that there are a large number of acupoints in human limb parts such as hands and feet. Precise means such as massage, acupuncture, and electrical stimulation of acupoints can effectively treat corresponding diseases. Modern medical research has shown that human acupoints have low-resistance characteristics, that is, the impedance of acupoint points is lower than that of the surrounding skin impedance. At present, a large number of instruments use electronic technology means and combine with traditional Chinese medicine acupoint treatment for related diseases, which is also an important development direction of future medical devices in China. Existing instruments have played a certain role in promoting the development of traditional Chinese medicine medical devices. However, with the progress of technology and the change of market demand, their limitations are becoming increasingly apparent:

[0003] First, the method of detecting acupoints has low accuracy and takes a long time, thus affecting the subsequent treatment effect;

[0004] Second, it is impossible to perform precise treatment at the located acupoints. Usually, two instruments for acupoint location and treatment need to be used in cooperation, which leads to deviations in the treatment position during the instrument conversion process;

[0005] Third, it cannot track the treatment process, and the treatment effect is entirely evaluated based on the subjective feelings of doctors and patients;

[0006] Fourth, the instrument operation is complex and the functions of the supporting software are imperfect, resulting in generally lower acceptance of traditional Chinese medicine instruments by doctors and patients compared with Western medicine instruments.

[0007] By retrieving existing invention patents, it is found that, for example, the invention patents with the authorized announcement numbers CN101496720B and CN109793516B disclose a technical solution for measuring human impedance, which can only measure the original human impedance data, and external instruments need to be used for multiple analysis and processing to obtain information such as acupoints; the invention patents with the authorized announcement numbers CN100475138C and CN102133152B both disclose devices for detecting human acupoints through an external resistor voltage division method. This method of measuring acupoints has low accuracy, takes a long time, and does not have the function of treating at the detected acupoints simultaneously. Re-treatment requires repeated positioning, which may result in inaccurate treatment positions; the invention patent with the authorized announcement number CN102802518B designs an instrument for detecting human meridian acupoints for acupuncture. This instrument needs to rely on expensive equipment such as CT or MRI to display meridian acupoints, has a large limitation in application scenarios, and cannot track the treatment process and evaluate the treatment effect.

[0008] In summary, the existing human bioelectrical impedance measurement technologies have the defects of low detection accuracy, single function, and large limitation in application scenarios. Summary of the Invention

[0009] To solve the above problems existing in the prior art, the present invention provides a device for measuring human limb impedance and electrotherapy. The technical problems to be solved by the present invention are achieved through the following technical solutions:

[0010] An embodiment of the present invention provides a device for measuring human limb impedance and electrotherapy, including a power supply board, a control board, a mode switching board, a channel selection board, and a sensing electrode array board. Among them,

[0011] The power supply board, the control board, the mode switching board, the channel selection board, and the sensing electrode array board are arranged in parallel side by side, and each board is fixedly connected through positioning connection columns and electrically connected through board-to-board connectors;

[0012] The control board is provided with a main control module, an impedance measurement module, a treatment module, and a treatment evaluation unit. The mode switching board is provided with a mode switching module, an output voltage and treatment current monitoring circuit, and an adaptive control unit. The channel selection board is provided with a channel selection module. The sensing electrode array board is provided with a sensor electrode array;

[0013] The main control module is connected to the mode switching module and the treatment evaluation unit. The mode switching module is connected to the channel selection module. The channel selection module is connected to the impedance measurement module and the treatment module. The impedance measurement module and the treatment module are respectively connected to limb electrode clips, and the limb electrode clips are used to clamp on a human limb;

[0014] The sensor electrode array is used to contact the human limb and is connected to the channel selection module. The channel selection module is connected to the mode switching module. The mode switching module is connected to the impedance measurement module and the output voltage and treatment current monitoring circuit. The impedance measurement module is connected to the main control module. The output voltage and treatment current monitoring circuit is connected to the adaptive control unit. The adaptive control unit is connected to the main control module.

[0015] In an embodiment of the present invention, the impedance measurement module includes an on-chip integrated frequency generator. The input end of the on-chip integrated frequency generator is connected to the channel selection module, and the output end is connected to the limb electrode clip.

[0016] In an embodiment of the present invention, an input-stage amplification detection circuit is further provided on the mode switching board. The impedance measurement module further includes an on-chip analog-to-digital converter and an on-chip digital signal processor. Among them,

[0017] The input end of the on-chip analog-to-digital converter is connected to the output end of the mode switching module. The output end of the on-chip analog-to-digital converter is connected to the input end of the on-chip digital signal processor. The output end of the on-chip digital signal processor is connected to the input end of the main control module;

[0018] The input end of the input-stage amplification detection circuit is connected to the output end of the mode switching module. The output end of the input-stage amplification detection circuit is connected to the input end of the on-chip analog-to-digital converter.

[0019] In an embodiment of the present invention, the measurement modes of the impedance measurement module include a normal measurement mode and a swept-frequency measurement mode.

[0020] In the normal measurement mode, the impedance measurement module sets a fixed frequency according to the measurement range, measurement accuracy, and time requirements to perform a scanning measurement on the impedance of the human limb;

[0021] In the swept-frequency measurement mode, the impedance measurement module sets the start frequency, frequency resolution, and number of swept-frequency points according to different impedance measurement ranges to perform a scanning measurement on the impedance of the human limb.

[0022] In an embodiment of the present invention, the main control module processes the measured impedance value returned by the impedance measurement module in a segmented fitting manner.

[0023] In an embodiment of the present invention, the treatment module includes a dead-time delay circuit, a gate driver chip, a field effect transistor, and a current limiting circuit. Among them,

[0024] The input end of the dead-time delay circuit is connected to the output end of the mode switching module, the output end of the dead-time delay circuit is connected to the input end of the gate driver chip, the output end of the gate driver chip is connected to the input end of the field effect transistor, the output end of the field effect transistor is connected to the input end of the current limiting circuit, and the output end of the current limiting circuit is connected to the limb electrode clip.

[0025] In an embodiment of the present invention, the mode switching module includes a main input quantity module and several separate input quantity modules, wherein,

[0026] The main input quantity module is respectively connected to the several separate input quantity modules, and the input end of the main input quantity module is connected to the main control module, the output end of the main input quantity module is connected to the impedance measurement module and the output voltage and treatment current monitoring circuit, and the several separate input quantity modules are bidirectionally connected to the channel selection module.

[0027] In an embodiment of the present invention, the channel selection module includes a total enable signal trigger logic controller, several multi-channel multiplexing switches and an address selection buffer, wherein,

[0028] The input end of the total enable signal trigger logic controller is connected to the output end of the mode switching module, the output end of the total enable signal trigger logic controller is respectively connected to the input ends of the several multi-channel multiplexing switches, the address selection buffer is connected to the total enable signal trigger logic controller and the several multi-channel multiplexing switches respectively, and the first output end of the several multi-channel multiplexing switches (412) is connected to the impedance measurement module (22) and the treatment module (23);

[0029] The output end of the sensor electrode array is connected to the several multi-channel multiplexing switches, and the second output end of the several multi-channel multiplexing switches is connected to the mode switching module.

[0030] In an embodiment of the present invention, the sensor electrode array includes several sensing electrodes, and the several sensing electrodes are arranged in an array;

[0031] Each of the sensing electrodes includes a needle head, a spring and a needle tube. One end of the spring is fixed inside the needle tube, and the other end is connected to one end of the needle head. The other end of the needle head protrudes from the needle tube to contact the human limb.

[0032] In an embodiment of the present invention, it further includes a host computer, which is connected to the main control module, and the host computer displays the impedance values measured by the impedance measurement module in a dot pattern with different colors.

[0033] Compared with the prior art, the beneficial effects of the present invention:

[0034] 1. The device of the present invention can achieve the measurement of human limb impedance data with wide range, high precision, multiple frequency points and multiple channels. The main control module sorts and analyzes the limb impedance data obtained by fitting the measured area, and compares the relative impedance magnitudes of each point in the measured area to obtain the acupoint treatment points, adapting to the individual differences of acupoints, making the accuracy of acupoint positioning higher. The measured impedance data can also be used for secondary analysis by professional physicians.

[0035] 2. The present invention can realize the switching between impedance measurement and treatment modes through the mode switching module. After locating the acupoint treatment point, the device is synchronously converted into a treatment function, and electrotherapy is performed on the electrode corresponding to the acupoint treatment point to achieve precise treatment, thus realizing the multiplexing function of device measurement and treatment. At the same time, the sensing electrode array and the channel selection circuit can achieve the precise positioning of each sensing electrode, realizing the flexible combination of impedance measurement and treatment areas, facilitating a large number of repeated and fine sampling analyses of abnormal areas, and improving the reliability of impedance data. At the same time, the impedance measurement and treatment functions can be realized in the same channel, avoiding the situation that the deviation of the treatment position affects the treatment effect, and realizing precise treatment.

[0036] 3. During the treatment process, the present invention monitors the treatment process in real time through the output voltage and treatment current monitoring circuit, ensuring the safety of the treatment process. After the treatment is completed, the device is converted into an impedance measurement function through the mode switching module, and the impedance data of the treatment area is measured again. The treatment effect can be quantitatively evaluated by comparing the impedance values of the treatment area before and after treatment.

[0037] 4. The human limb impedance measurement and electrotherapy device of the present invention is simultaneously equipped with a host computer software with complete functions and simple operation. When displaying, color assignment processing is performed on the impedance data to quickly locate the lesion points.

[0038] 5. The human limb impedance measurement and electrotherapy device of the present invention arranges the power supply board, control board, mode switching board, channel selection board, and sensing electrode array board in parallel, making the internal circuit functions of the device discrete, reducing the volume of the device, making the device small and portable, improving the mobility of the device, expanding the mobility of the device, and at the same time, the discrete functions improve the anti-interference ability of the device, meeting the future development trend of miniaturization and integration of medical devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention;

[0040] Figure 2 is a top view of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention;

[0041] Figure 3 Functional block diagram of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention;

[0042] Figure 4 Another functional block diagram of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention;

[0043] Figure 5 Structural schematic diagram of an impedance measurement module provided by an embodiment of the present invention;

[0044] Figure 6 Structural schematic diagram of a treatment module provided by an embodiment of the present invention;

[0045] Figure 7 Structural schematic diagram of a mode switching module provided by an embodiment of the present invention;

[0046] Figure 8 Structural schematic diagram of a channel selection module provided by an embodiment of the present invention;

[0047] Figure 9 Impedance measurement result graph of the host computer interface provided by an embodiment of the present invention;

[0048] Figure 10 Flowchart of the working process of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention. Detailed implementation manners

[0049] The following further describes the present invention in detail with reference to specific embodiments, but the implementation manners of the present invention are not limited thereto.

[0050] Embodiment 1

[0051] Please refer to Figure 1 , Figure 1 Structural schematic diagram of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention. The device includes a power supply board 1, a control board 2, a mode switching board 3, a channel selection board 4, and a sensing electrode array board 5. Among them, the power supply board 1, the control board 2, the mode switching board 3, the channel selection board 4, and the sensing electrode array board 5 are arranged in parallel side by side, and each board is fixedly connected through a positioning connection column 6 and electrically connected through a board-to-board connector 7.

[0052] Specifically, the power supply board 1, the control board 2, the mode switching board 3, the channel selection board 4, and the sensing electrode array board 5 are arranged from top to bottom in sequence. The positioning connection column 6 realizes the mechanical fixation and positioning between each board, and the board-to-board connector 7 is used for the electrical connection between boards to realize signal transmission and power transmission.

[0053] Please refer to Figure 2 ,Figure 2 This is a top view of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention. Fixed handles 10 are also provided on both sides of the device for convenient grasping.

[0054] In this embodiment, the hardware structure of the human limb impedance measurement and electrotherapy device is hierarchically designed according to the principle of functional separation. The power supply board, control board, mode switching board, channel selection board, and sensing electrode array board are arranged in parallel, enabling the internal circuits of the device to have separate functions, reducing the volume of the device, making the device small and portable, improving the mobility of the device, and at the same time, the functional separation improves the anti-interference ability of the device, meeting the future development trend of miniaturization and integration of medical devices.

[0055] Please refer to Figure 3 , Figure 3 This is a functional block diagram of a human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention.

[0056] In this device, a main control module 21, an impedance measurement module 22, a therapy module 23, and a therapy evaluation unit 24 are provided on the control board 2. A mode switching module 31, an output voltage and therapy current monitoring circuit 32, and an adaptive control unit 33 are provided on the mode switching board 3. A channel selection module 41 is provided on the channel selection board 4. A sensor electrode array 51 is provided on the sensing electrode array board 5.

[0057] Specifically, the main control module 21 is connected to the mode switching module 31 and the therapy evaluation unit 24. The mode switching module 31 is connected to the channel selection module 41. The channel selection module 41 is connected to the impedance measurement module 22 and the therapy module 23. The impedance measurement module 22 and the therapy module 23 are respectively connected to the limb electrode clip 9, and the limb electrode clip 9 is used to clamp on a human limb. The sensor electrode array 51 is used to contact the human limb and is connected to the channel selection module 41. The channel selection module 41 is connected to the mode switching module 31. The mode switching module 31 is connected to the impedance measurement module 22 and the output voltage and therapy current monitoring circuit 32. The impedance measurement module 22 is connected to the main control module 21. The output voltage and therapy current monitoring circuit 32 is connected to the adaptive control unit 33. The adaptive control unit 33 is connected to the main control module 21.

[0058] When the device is used for impedance measurement, the main control module 21 is connected to the mode switching module 31, the mode switching module 31 is connected to the channel selection module 41, the channel selection module 41 is connected to the impedance measurement module 22, the impedance measurement module 22 is connected to the limb electrode clip 9, and the limb electrode clip 9 is clamped on the human limb; the sensor electrode array 51 is used to contact the human limb and is connected to the channel selection module 41, the channel selection module 41 is connected to the mode switching module 31, the mode switching module 31 is connected to the impedance measurement module 22, and the impedance measurement module 22 is connected to the main control module 21.

[0059] Specifically, the main control module 21 is responsible for sending measurement instructions. The mode switching module 31 switches the working mode to the impedance measurement mode according to the measurement instructions. The channel selection module 41 accurately locates the signal transmission channel according to the measurement instructions to determine the measurement area. The impedance measurement module 22 generates a small AC stimulation signal according to the measurement instructions, and this AC stimulation signal acts on the human limb through the limb electrode clip 9; afterwards, the sensor electrode array 51 in contact with the human limb collects limb impedance data and returns it to the channel selection module 41. The limb impedance data returns from the located transmission channel to the mode switching module 31. The input port of the mode switching module 31 constructs an input loop between the channel selection module 41 and the impedance measurement module 22, returns the limb impedance data to the impedance measurement module 22. The impedance measurement module 22 uses a data processing algorithm to obtain the impedance value by calculating the difference between the measurement instructions and the limb impedance data, realizing high-precision impedance measurement. The impedance measurement module 22 returns the calculated impedance value to the main control module 21 for further processing of the impedance data.

[0060] When the device is used for electrotherapy, the main control module 21 is connected to the mode switching module 31, the mode switching module 31 is connected to the channel selection module 41, the channel selection module 41 is connected to the therapy module 23, the therapy module 23 is respectively connected to the limb electrode clip 9, and the limb electrode clip 9 is used to clamp on the human limb; the sensor electrode array 51 is used to contact the human limb and is connected to the channel selection module 41, the channel selection module 41 is connected to the mode switching module 31, the mode switching module 31 is connected to the output voltage and therapy current monitoring circuit 32, and the output voltage and therapy current monitoring circuit 32 is connected to the adaptive control unit 33, and the adaptive control unit is connected to the main control module 21.

[0061] Specifically, the main control module 21 is responsible for sending treatment instructions, which include treatment acupoint positions, treatment time, and treatment intensity. The mode switching module 31 switches the working mode to the electrotherapy mode according to the treatment instructions. The channel selection module 41 accurately locates the signal transmission channel according to the treatment instructions to determine the treatment acupoint positions. The treatment module 23 generates treatment waves in multiple working modes. The treatment waves act on the human body limbs through the limb electrode clips 9. At the same time, the output pulse electrical signals can be used for treatment by using the limb electrode clips 9. Then, the sensor electrode array 51 in contact with the human body limbs collects the treatment voltage and treatment current and returns them to the channel selection module 41. The treatment voltage and treatment current return from the located transmission channel to the mode switching module 31. The mode switching module 31 returns the treatment voltage and treatment current to the output voltage and treatment current monitoring circuit 32. The output voltage and treatment current monitoring circuit 32 filters and monitors the treatment voltage and treatment current and then returns the monitoring signal to the adaptive control unit 33. The adaptive control unit 33 first converts the monitoring signal by using an analog-to-digital converter, and then determines whether the converted treatment voltage remains within the set treatment voltage and current.

[0062] Furthermore, the output voltage and treatment current monitoring circuit 32 can monitor the treatment process in real time to ensure the safety and reliability of the voltage and current applied to the human body. The output voltage and treatment current monitoring circuit 32 includes a filtering circuit and a monitoring circuit. The filtering circuit filters the treatment voltage and treatment current and then connects to the monitoring circuit. The monitoring circuit monitors the filtered signal and then returns the monitoring signal to the adaptive control unit 33. The monitoring circuit is a triple protection monitoring circuit. The first stage is the voltage output monitoring circuit, the second stage is the output current one-time amplification monitoring circuit, and the third stage is the output current second-stage amplification monitoring circuit. The voltage output monitoring circuit, the output current one-time amplification monitoring circuit, and the output current second-stage amplification monitoring circuit are connected in sequence. The output terminals of the voltage output monitoring circuit, the output current one-time amplification monitoring circuit, and the output current second-stage amplification monitoring circuit are respectively connected to the voltage acquisition pins of the adaptive control unit 33. Before the expected treatment time is reached, when the pins detect the treatment voltage and treatment current, the adaptive control unit 33 calculates the difference between the expected treatment voltage and current and the actually measured treatment voltage and current, and transmits it as the quantity to be adjusted to the main control module 21 to realize the closed-loop detection and treatment function, ensuring the best treatment effect. If the expected treatment time is reached, the treatment effect evaluation is carried out.

[0063] Further, after the treatment time ends, the device is converted to the impedance measurement function through the mode switching module 31, and the impedance data of the treatment area is measured again. The main control module 21 transmits the post-treatment impedance data to the treatment evaluation unit 24. The treatment evaluation unit 24 combines traditional Chinese medicine theory and evaluates the treatment effect quantitatively by comparing the impedance values of the treatment area before and after treatment. If the impedance becomes smaller after treatment, a negative treatment evaluation is given; if the impedance becomes higher after treatment, a positive treatment evaluation is given.

[0064] Please refer to Figure 4 , Figure 4 which is a functional block diagram of another human limb impedance measurement and electrotherapy device provided by an embodiment of the present invention. Figure 4 The human limb impedance measurement and electrotherapy device in also includes an optocoupler module 34, and the optocoupler module 34 is arranged on the mode switching board 3. The input end of the optocoupler module 34 is connected to the output end of the main control module 21, and the output end of the optocoupler module 34 is connected to the input end of the mode switching module 31.

[0065] Specifically, the initial mode of the device is the impedance measurement mode. The device can be switched to the treatment mode through the mode switching module 31. The measurement and treatment conversion function of the same sensing probe channel can be realized through the mode switching module 31 and the channel selection module 41. Therefore, to ensure the accuracy of the control signal of the mode switching module 31, the optocoupler module 34 is used to isolate the control signal of the main control module 21 and the control signal of the mode switching module 31.

[0066] Please refer to Figure 5 , Figure 5 which is a structural schematic diagram of an impedance measurement module provided by an embodiment of the present invention.

[0067] In a specific embodiment, the impedance measurement module 22 includes an on-chip integrated frequency generator 221. The input end of the on-chip integrated frequency generator 221 is connected to the channel selection module 41, and the output end is connected to the limb electrode clip 9.

[0068] Specifically, the impedance measurement module 22 is controlled by the main control module 21 and is used to perform impedance measurement according to different working modes configured by the user and return the impedance information to the main control module 21. When the impedance measurement module 22 is used for impedance signal transmission, the impedance measurement module 22 generates a tiny alternating current stimulation signal as the excitation signal of the human limb impedance through the on-chip integrated frequency generator 221. The main control module 21 can realize frequency scanning by configuring the scanning start frequency and the number of frequency sweep points of the alternating current stimulation signal, and characterize the human limb impedance characteristics through frequency scanning.

[0069] In a specific embodiment, the impedance measurement module 22 includes an on-chip integrated frequency generator 221, an on-chip analog-to-digital converter 222, and an on-chip digital signal processor 223. An input-stage amplification detection circuit 35 is further provided on the mode switching board 3. Among them, the input end of the on-chip integrated frequency generator 221 is connected to the channel selection module 41, and the output end is connected to the limb electrode clip 9. The input end of the on-chip analog-to-digital converter 222 is connected to the output end of the mode switching module 31, the output end of the on-chip analog-to-digital converter 222 is connected to the input end of the on-chip digital signal processor 223, and the output end of the on-chip digital signal processor 223 is connected to the input end of the main control module 21. The input end of the input-stage amplification detection circuit 35 is connected to the output end of the mode switching module 31, and the output end of the input-stage amplification detection circuit 35 is connected to the input end of the on-chip analog-to-digital converter 222.

[0070] When the impedance measurement module 22 is used to return limb impedance data, the sensor electrode array 51 sequentially returns the collected limb impedance data to the impedance measurement module 22 through the channel selection module 41 and the mode switching module 31. To ensure that the input range of the impedance measurement module 22 does not exceed the limit, an input-stage amplification detection circuit 35 is provided between the impedance measurement module 22 and the mode switching module 31. A single-pole triple-throw switch is provided on the hardware circuit in the input-stage amplification detection circuit 35. The single-pole triple-throw switch can select different amplification gains according to different impedance measurement ranges to ensure data accuracy. Then, the on-chip analog-to-digital converter 222 in the impedance measurement module 22 performs analog-to-digital conversion on the received limb impedance data to obtain a digital signal. The on-chip digital signal processor 223 performs a Fourier transform on the digital signal to obtain an impedance value and returns the impedance value to the main control module 21. After receiving the impedance value, the main control module 21 performs data fitting and calibration processing according to the accuracy requirements to ensure the accuracy of the measurement result.

[0071] In this embodiment, the sensing electrode positioning is realized by the mode switching module in cooperation with the channel selection module in the measurement mode, and the sensing probes can be arbitrarily combined for measurement according to the measurement requirements, enriching the measurement scenarios and measurement requirements.

[0072] In a specific embodiment, the measurement modes of the impedance measurement module 22 include a normal measurement mode and a sweep frequency measurement mode.

[0073] Specifically, the impedance measurement module 22 is configured to operate in different modes according to different impedance measurement ranges. Its measurement modes include the normal measurement mode and the sweep frequency measurement mode. In the normal measurement mode, the impedance measurement module 22 scans and measures the impedance of the human limb by setting a fixed frequency by the host computer according to the measurement range, measurement accuracy, and time requirements. In the sweep frequency measurement mode, the impedance measurement module 22 sets the starting frequency, frequency resolution, and number of sweep points according to different impedance measurement ranges to scan and measure the impedance of the human limb. For example, the starting frequency can be set to 1, the frequency resolution can be set to 1, and the number of scan points can be set to 20 according to different impedance measurement ranges. At this time, the scanning stops when 21 is scanned; the sweep frequency measurement mode can solve the non-linear error caused by impedance measurement under different frequency excitations, optimize the frequency aliasing and frequency leakage phenomena caused by the discrete Fourier transform, and realize multi-frequency point impedance measurement.

[0074] In a specific embodiment, the main control module 21 processes the impedance data returned by the impedance measurement module 22 in a segmented fitting manner to reduce the influence of random errors in the measurement on the accuracy of the collected data and achieve wide-range and high-precision measurement.

[0075] Specifically, the main control module 21 performs data fitting processing on the original impedance data returned by the impedance measurement module 22 to optimize the random error in the measurement process, and sets different fitting matching algorithms according to the measurement impedance range and measurement impedance accuracy to solve the non-linear problem of the impedance measurement module 22. Further, the main control module 21 adopts a segmented fitting method to ensure that the impedance measurement of each segment reaches the optimal accuracy. The specific steps are as follows: First, the program determines the sampling impedance value range and merges the impedance values into the first type of classification interval, and then repeatedly refines the range and classifies it into different impedance intervals. Different intervals use different fitting processing algorithms for impedance calibration to obtain calibrated impedance data. For example, a linear fitting algorithm is used in the measurement interval where the impedance value is 1k to 10k, and a polynomial fitting algorithm is used in the 10k - 20k measurement interval, thereby achieving high-precision measurement in a wide impedance measurement range.

[0076] Further, the main control module 21 transfers and stores the calibrated impedance data to prevent loss due to power failure, and sends it to the host computer through the serial port or Bluetooth for further data analysis.

[0077] Furthermore, the main control module 21 performs sorting analysis on the high-precision limb impedance data obtained by fitting the measured area, and obtains the acupoint treatment points by comparing the relative impedance sizes of each point in the measured area, adapting to the individual differences of acupoints, making the accuracy of acupoint positioning higher. And after the treatment is over, the main control module 21 automatically converts the device to the impedance measurement function, measures the impedance data of the treatment area again, and can quantitatively evaluate the treatment effect by comparing the impedance values of the treatment area before and after treatment.

[0078] Please refer toFigure 6 , Figure 6 is a schematic structural diagram of a treatment module provided by an embodiment of the present invention. The treatment module 23 includes a dead-time delay circuit 231, a gate driver chip 232, a field effect transistor 233, and a current limiting circuit 234. Among them, the input end of the dead-time delay circuit 231 is connected to the output end of the mode switching module 31, the output end of the dead-time delay circuit 231 is connected to the input end of the gate driver chip 232, the output end of the gate driver chip 232 is connected to the input end of the field effect transistor 233, the output end of the field effect transistor 233 is connected to the input end of the current limiting circuit 234, and the output end of the current limiting circuit 234 is connected to the limb electrode clip 9.

[0079] Specifically, the main control module 21 pin generates a pair of complementary pulse width modulation signals to control the gate driver chip 232 to alternately turn on and off the field effect transistor 233. The high-end drive of the field effect transistor 233 accesses a high voltage, and a current limiting circuit 234 is designed to make its output high-voltage and small-current signal act on the human body. At the same time, a dead-time delay circuit 231 and a protection program are designed to prevent the high-end and low-end field effect transistors from conducting simultaneously and causing a short circuit. The main control module 21 generates various treatment modes by combining parameters such as the frequency and duty cycle of the pulse width modulation signal, and can adjust treatment parameters such as the output treatment time, intensity, and frequency. And in the treatment mode, the channel selection module 41 makes each sensing electrode have a unique address code, and the treatment address can be set through the host computer command. According to the requirements of professional doctors or users, any pin can be combined for treatment, and the treatment freedom is higher; in addition, after the device locates the acupoint treatment point, it can automatically synchronously convert to the treatment function and perform electrotherapy on the electrode corresponding to the acupoint treatment point to achieve precise treatment; at the same time, an output voltage and treatment current monitoring circuit 32 is designed to monitor the treatment process in real time; in the treatment mode, the program intermittently collects the treatment voltage and treatment current and sends them to the host computer display interface in real time. When any level of the monitoring link exceeds the set limit, the protection program is started.

[0080] In this embodiment, the treatment modes of the device have different combination forms, and at the same time have the function of monitoring and alarming the treatment voltage and current, realizing the real-time monitoring function of the treatment process and protecting the safety of human body treatment. Please refer to Figure 2 again. The sensor electrode array 51 includes a plurality of sensing electrodes, and the plurality of sensing electrodes are arranged in an array. Specifically, the number of sensing electrodes is multiple, and the number of sensing electrodes and the distribution shape of the plurality of sensing electrodes can be set according to actual needs. This embodiment does not make further limitations. Figure 2 For the application of limb impedance measurement, an impedance measurement array composed of 72 sensing electrodes is designed.

[0081] In this embodiment, an impedance measurement array is formed by multiple sensing electrodes, which can realize the measurement of impedance information at multiple local points. Thus, valuable information can be analyzed by collecting a large amount of local impedance information, and the accuracy of the initial limb impedance data is ensured at the source stage. At the same time, the sensing electrode array and the channel selection circuit can realize the precise positioning of each sensing electrode, so as to realize the flexible matching of the measurement impedance address and the area, achieve the flexibility of impedance measurement, facilitate a large number of repeated and fine sampling analyses of abnormal areas, and improve the reliability of impedance data.

[0082] In a specific embodiment, each sensing electrode is a three-section probe electrode with a telescopic structure and a spring inside, including a needle tip, a spring, and a needle tube. Among them, one end of the spring is fixed inside the needle tube, and the other end is connected to one end of the needle tip. The other end of the needle tip protrudes from the needle tube to contact the human limb. Specifically, the materials of the needle tip, the spring, and the needle tube are all copper, and the part of the needle tip in contact with the limb is also wrapped with gold to ensure the conductivity of the needle tip while having the advantages of small contact impedance with the skin surface and no side effects on sensitive skin.

[0083] This embodiment endows the sensing electrode with telescopic characteristics, ensuring good contact between the sensing electrode and the limb; the sensing electrode is made of copper and gold-plated at the needle tip, ensuring the conductivity of the needle tip while having the advantages of small contact impedance with the skin surface and no side effects on sensitive skin, suitable for the characteristics of multiple physical constitutions of people, easy to form an electrode array, and having a relatively wide working frequency band, suitable for measuring the complex impedance characteristics of the human limb in a swept-frequency measurement mode.

[0084] Please refer to Figure 7 and Figure 8 , Figure 7 which is a schematic structural diagram of a mode switching module provided by an embodiment of the present invention, Figure 8 which is a schematic structural diagram of a channel selection module provided by an embodiment of the present invention.

[0085] In a specific embodiment, the mode switching module 31 includes a main input module 311 and several separate input modules 312. Among them, the main input module 311 is respectively connected to the several separate input modules 312, and the input end of the main input module 311 is connected to the main control module 21, the output end of the main input module 311 is connected to the impedance measurement module 22 and the output voltage and treatment current monitoring circuit 32, and the several separate input modules 312 are bidirectionally connected to the channel selection module 41.

[0086] Specifically, the function of the mode switching module 31 is to convert the impedance measurement or the electrotherapy function, and it forms a total-sub structure by the main input module 311 and several separate input modules 312. The main input module 311 and several separate input modules 312 can both adopt double-pole double-throw switches. The main input module 311 and several separate input modules 312 are each controlled separately by the main control module 21, i.e., the single-chip microcomputer.

[0087] Specifically, the number of the separate input modules 312 can be 4.

[0088] In a specific embodiment, the channel selection module 41 includes a total enable signal trigger logic controller 411, several multi-channel multiplexing switches 412, and an address selection buffer 413. Among them, the input end of the total enable signal trigger logic controller 411 is connected to the output end of the mode switching module 31, the output end of the total enable signal trigger logic controller 411 is respectively connected to the input ends of several multi-channel multiplexing switches 412, the address selection buffer 413 is connected to the total enable signal trigger logic controller 411 and several multi-channel multiplexing switches 412 respectively, the first output ends of several multi-channel multiplexing switches 412 are connected to the impedance measurement module 22 and the therapy module 23; the output end of the sensor electrode array 51 is connected to several multi-channel multiplexing switches 412, the output ends of several multi-channel multiplexing switches 412 are connected to the mode switching module 31, and the second output ends of several multi-channel multiplexing switches 412 are connected to the mode switching module 31.

[0089] Specifically, the total enable signal trigger logic controller 411 can be a multi-channel multiplexing switch, which is used to provide an enable control signal for several multi-channel multiplexing switches 412. The address selection buffer 413 is an eight-bit address selection buffer, which is used to provide address coding for several multi-channel multiplexing switches 412.

[0090] Further, when the main control module 21 sends an impedance measurement or treatment instruction, the main input module 311 in the mode switching module 31 switches to the impedance measurement or treatment mode according to the instruction, and sends the corresponding instruction to the impedance measurement module 22 for impedance measurement or the treatment module 23 for treatment; at the same time, each separate input module 312 corresponds to several multi-channel multiplexing switches 412. When the multi-channel multiplexing switch 412 corresponding to the separate input module 312 is selected, the main control module 21 controls this separate input module 312 to be selected as well. Furthermore, the sensor electrode array 51 returns an impedance measurement or electrotherapy signal. The returned signal is output and aggregated to the separate input module 312 after passing through the selected multi-channel multiplexing switch 412 in the channel selection module 41. After aggregating the outputs of multiple separate input modules 312, it is connected to the main input module 311 for the measurement or treatment module to collect; when in the impedance measurement mode, the output of the main input module 311 is connected to the impedance measurement module 22; when in the treatment mode, the output of the main input module 311 is connected to the output voltage and treatment current monitoring circuit 32 in the treatment circuit part for safe collection of the treatment voltage and current, thus realizing the functional multiplexing of impedance measurement and electrotherapy on the same channel.

[0091] Specifically, the multi-channel multiplexing switch can be an eight-channel multiplexing switch or a sixteen-channel multiplexing switch. The number of channels of the multiplexing switch and the number of multiplexing switches are specifically set according to the number of sensing electrodes. Taking 72 sensing electrodes as an example, the channel selection module 41 can be formed by paralleling 9 eight-channel multiplexing switches. Further, multiple multi-channel multiplexing switches 412 share a separate input module 312. After aggregating the outputs of multiple separate input modules 312, it is connected to the main input module 311 for the measurement or treatment module to collect. The mode switching module 31 is directly controlled by the main control. The main control controls the eight-bit address selection buffer 413 to configure the address coding logic of multiple multi-channel multiplexing switches. The enable signal of the logic controller 411 can be triggered by the total enable signal to control whether the multi-channel multiplexing switch 412 works. In order to make the sensor electrode array obtain a unique address coding, a total enable signal trigger logic controller 411 and an eight-bit address selection buffer 413 are designed. Through the combination arrangement of the address and enable logic, precise address coding is performed on 72 sensing electrodes. Each unique address coding is stored in the main control program to realize that each sensing electrode has a unique address corresponding to it. The acquisition output signal of a single multi-channel multiplexing switch 412 is aggregated through the bus to the separate input module 412. In the case of impedance signal acquisition or electrotherapy mode, the measurement and treatment areas can be arbitrarily selected, and multi-channel high-precision measurement and treatment are realized within a local range.

[0092] Please refer to Figure 1 and Figure 4, the human limb impedance measurement and electrotherapy device of this embodiment further includes a host computer 8, the host computer 8 is connected to the main control module 21, and the host computer 8 uses different hues to perform dot display on the impedance values measured by the impedance measurement module 22.

[0093] Specifically, the host computer 8 can be connected to the main control module 21 through wireless Bluetooth or wired serial port, so as to send commands to the main control module 21 for control or receive the data returned by the main control module 21, realizing data transceiver between the host computer 8 and the main control module 21. The process of data transceiver between the host computer 8 and the main control module 21 is as follows: The user sends start measurement or treatment instructions through the host computer 8. The host computer 8 and the main control module 21 communicate using the MODBUS protocol. The user can configure various instructions according to functional requirements, and it is convenient for the main control module 21 to parse a large amount of impedance data. After receiving and parsing the instructions, the main control module 21 issues corresponding control instructions, and the mode switching module 31, channel selection module 41, impedance measurement module 22, and treatment module 23 work according to the control instructions; in the impedance measurement mode, after completing the impedance measurement, the main control module 21 performs preliminary processing on the limb impedance data and then transmits it to the host computer 8 for further data processing analysis and graphical display; in the electrotherapy mode, the main control module 21 sends the real-time treatment voltage and current to the host computer 8, and the user can monitor the treatment process safely and reliably through the host computer 8.

[0094] Please refer to Figure 9 , Figure 9 It is a graph of impedance measurement results of the host computer interface provided by the embodiment of the present invention. Specifically, the host computer 8 optimizes the limb impedance data to make the measurement results visual, corresponds the impedance values one by one with the visual impedance values of the host computer, and performs dot display. The smaller impedance values are represented by warm colors, and the larger values are represented by cold colors. The color display of the impedance values through color combination is convenient for users to directly and conveniently obtain abnormal impedance values. The intuitive display of a large number of local collected signals and the built-in diagnostic judgment algorithm of the host computer judge the points to be treated, assisting professional doctors in extracting and analyzing useful information, and providing strong support for subsequent treatment diagnosis methods.

[0095] The host computer of this embodiment performs dot display on the impedance values using different hues, with intuitive and friendly display, and can quickly locate the lesion points.

[0096] Please refer to Figure 10 , Figure 10 It is a flowchart of the working process of a human limb impedance measurement and electrotherapy device provided by the embodiment of the present invention. The working process of this human limb impedance measurement and electrotherapy device includes the steps:

[0097] S1: Collect the impedance signals of the limb part.

[0098] Specifically, impedance signals of the limb part are collected by using the main control module 21, the mode switching module 31, the channel selection module 41, the impedance measurement module 22, the limb electrode clip 9, and the sensor electrode array 51.

[0099] S2: Process the limb impedance data to obtain wide-range and high-precision impedance data.

[0100] Specifically, the main control module 21 processes the impedance data returned by the impedance measurement module 22 in a piecewise fitting manner.

[0101] S3: Determine the treatment points.

[0102] Specifically, the main control module 21 performs sorting analysis on the limb impedance data obtained by fitting the measured area, compares the relative impedance magnitudes of each point in the measured area, and takes the point with the smallest relative impedance magnitude as the treatment acupoint for the electrotherapy function.

[0103] S4: Electrotherapy. Perform electrotherapy at the determined treatment acupoints.

[0104] S5: Output voltage and treatment current monitoring to realize real-time monitoring of the treatment voltage and current information during the treatment process.

[0105] S6: Adaptive control. During electrotherapy, adaptively control the treatment voltage and current to maintain them in the desired state to achieve the best treatment effect.

[0106] S7: Treatment effect evaluation.

[0107] For the specific implementation manners of steps S1 - S7, please refer to the above description and will not be elaborated here.

[0108] The device of this embodiment can realize the measurement of human limb impedance data with wide range, high precision, multiple frequency points and multiple channels. By performing sorting analysis on the limb impedance data obtained by fitting the measured area by the main control module and comparing the relative impedance magnitudes of each point in the measured area, the treatment acupoint positions are obtained, adapting to the individual difference characteristics of acupoints, making the accuracy of acupoint positioning higher. The measured impedance data can also be used for secondary analysis by professional physicians.

[0109] In this embodiment, the mode switching module can be used to switch between impedance measurement and treatment modes. After the acupoint treatment point is located, the device is synchronously converted into a treatment function, and electrotherapy is performed on the electrode corresponding to the acupoint treatment point to achieve precise treatment, thus realizing the multiplexing function of device measurement and treatment. At the same time, the sensing electrode array and the channel selection circuit can achieve precise positioning of each sensing electrode, realizing flexible combination of impedance measurement and treatment areas, facilitating a large number of repeated fine sampling analyses of abnormal areas, and improving the reliability of impedance data. At the same time, the impedance measurement and treatment functions can be realized in the same channel, avoiding the situation that the deviation of the treatment position affects the treatment effect and realizing precise treatment.

[0110] During the treatment process of this embodiment, the output voltage and treatment current monitoring circuit is used to track the treatment process in real time, ensuring the safety of the treatment process. After the treatment is completed, the device is converted into an impedance measurement function through the mode switching module, and the impedance data of the treatment area is measured again. The treatment effect can be quantitatively evaluated by comparing the impedance values of the treatment area before and after treatment.

[0111] The human limb impedance measurement and electrotherapy device of this embodiment is also equipped with a host computer software with complete functions and simple operation. When displaying, color assignment processing is performed on the impedance data to quickly locate the lesion points.

[0112] The human limb impedance measurement and electrotherapy device of this embodiment arranges the power supply board, control board, mode switching board, channel selection board, and sensing electrode array board in parallel, making the internal circuit functions of the device discrete, reducing the volume of the device, making the device small and portable, improving the mobility of the device, and at the same time, the discrete functions improve the anti-interference ability of the device, meeting the future development trend of miniaturization and integration of medical devices.

[0113] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A human limb impedance measurement and electrotherapy device, characterized in that It includes a power supply board (1), a control board (2), a mode switching board (3), a channel selection board (4), and a sensing electrode array board (5). Among them, the power supply board (1), the control board (2), the mode switching board (3), the channel selection board (4), and the sensing electrode array board (5) are arranged in parallel side by side, and each board is fixedly connected through a positioning connection post (6) and electrically connected through a board-to-board connector (7); a main control module (21), an impedance measurement module (22), a treatment module (23), and a treatment evaluation unit (24) are provided on the control board (2), a mode switching module (31), an output voltage and treatment current monitoring circuit (32), and an adaptive control unit (33) are provided on the mode switching board (3), a channel selection module (41) is provided on the channel selection board (4), and a sensor electrode array (51) is provided on the sensing electrode array board (5); the main control module (21) is connected to the mode switching module (31) and the treatment evaluation unit (24), the mode switching module (31) is connected to the channel selection module (41), the channel selection module (41) is connected to the impedance measurement module (22) and the treatment module (23), the impedance measurement module (22) and the treatment module (23) are respectively connected to a limb electrode clip (9), and the limb electrode clip (9) is used to clamp on a human limb; the sensor electrode array (51) is used to contact the human limb and is connected to the channel selection module (41), the channel selection module (41) is connected to the mode switching module (31), the mode switching module (31) is connected to the impedance measurement module (22) and the output voltage and treatment current monitoring circuit (32), the impedance measurement module (22) is connected to the main control module (21), the output voltage and treatment current monitoring circuit (32) is connected to the adaptive control unit (33), and the adaptive control unit (33) is connected to the main control module (21); the measurement modes of the impedance measurement module (22) include a normal measurement mode and a frequency sweep measurement mode; in the normal measurement mode, the impedance measurement module (22) sets a fixed frequency according to the measurement range, measurement accuracy, and time requirement to perform a scanning measurement on the impedance of the human limb; in the frequency sweep measurement mode, the impedance measurement module (22) sets the start frequency, frequency resolution, and number of frequency sweep points according to different impedance measurement ranges to perform a scanning measurement on the impedance of the human limb; the main control module (21) processes the impedance data returned by the impedance measurement module (22) in a piecewise fitting manner and performs sorting analysis on the fitted impedance data to determine the acupoint treatment points by comparing the relative impedance magnitudes of each point; The treatment module (23) includes a dead-time delay circuit (231), a gate driver chip (232), a field effect transistor (233), and a current limiting circuit (234). Among them, the input end of the dead-time delay circuit (231) is connected to the output end of the mode switching module (31), the output end of the dead-time delay circuit (231) is connected to the input end of the gate driver chip (232), the output end of the gate driver chip (232) is connected to the input end of the field effect transistor (233), the output end of the field effect transistor (233) is connected to the input end of the current limiting circuit (234), and the output end of the current limiting circuit (234) is connected to the limb electrode clip (9).

2. The human limb impedance measurement and electrotherapy device according to claim 1, wherein The impedance measurement module (22) includes an on-chip integrated frequency generator (221). The input end of the on-chip integrated frequency generator (221) is connected to the channel selection module (41), and the output end is connected to the limb electrode clip (9).

3. The human limb impedance measurement and electrotherapy device according to claim 1, wherein An input-stage amplification detection circuit (35) is further provided on the mode switching board (3). The impedance measurement module (22) further includes an on-chip analog-to-digital converter (222) and an on-chip digital signal processor (223). Among them, the input end of the on-chip analog-to-digital converter (222) is connected to the output end of the mode switching module (31), the output end of the on-chip analog-to-digital converter (222) is connected to the input end of the on-chip digital signal processor (223), and the output end of the on-chip digital signal processor (223) is connected to the input end of the main control module (21); the input end of the input-stage amplification detection circuit (35) is connected to the output end of the mode switching module (31), and the output end of the input-stage amplification detection circuit (35) is connected to the input end of the on-chip analog-to-digital converter (222).

4. The human limb impedance measurement and electrotherapy device according to claim 1, characterized in that, The mode switching module (31) includes a main input quantity module (311) and a plurality of separate input quantity modules (312). Among them, the main input quantity module (311) is respectively connected to the plurality of separate input quantity modules (312), and the input end of the main input quantity module (311) is connected to the main control module (21), the output end of the main input quantity module (311) is connected to the impedance measurement module (22) and the output voltage and treatment current monitoring circuit (32), and the plurality of separate input quantity modules (312) are bidirectionally connected to the channel selection module (41).

5. The human limb impedance measurement and electrotherapy device according to claim 1, characterized in that, The channel selection module (41) includes a general enable signal trigger logic controller (411), a plurality of multi-channel multiplexing switches (412), and an address selection buffer (413). Among them, The input end of the total enable signal triggering logic controller (411) is connected to the output end of the mode switching module (31). The output end of the total enable signal triggering logic controller (411) is respectively connected to the input ends of the plurality of multi-channel multiplexing switches (412). The address selection buffer (413) is respectively connected to the total enable signal triggering logic controller (411) and the plurality of multi-channel multiplexing switches (412). The first output ends of the plurality of multi-channel multiplexing switches (412) are connected to the impedance measurement module (22) and the treatment module (23). The output end of the sensor electrode array (51) is connected to the plurality of multi-channel multiplexing switches (412). The second output ends of the plurality of multi-channel multiplexing switches (412) are connected to the mode switching module (31).

6. The human limb impedance measurement and electrotherapy device according to claim 1, characterized in that The sensor electrode array (51) includes a plurality of sensing electrodes, and the plurality of sensing electrodes are arranged in an array. Each of the sensing electrodes includes a needle head, a spring, and a needle tube. One end of the spring is fixed inside the needle tube, and the other end is connected to one end of the needle head. The other end of the needle head protrudes from the needle tube to contact the human limb.

7. The human limb impedance measurement and electrotherapy device according to claim 1, wherein It further includes a host computer (8). The host computer (8) is connected to the main control module (21). The host computer (8) dot-displays the impedance values measured by the impedance measurement module (22) in different colors.

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