A tuning method and device for an ultrashort wave therapeutic apparatus

Abstract

The application discloses a tuning method and device of an ultrashort wave therapeutic instrument, controls a solid-state source to output a target high-frequency signal to a tuning circuit, the tuning circuit comprises a variable capacitor driven by an adjuster; the capacitance value of the variable capacitor driven by the adjuster is controlled to change in a preset range; a reverse voltage output by the solid-state source in the capacitance value changing process of the variable capacitor is acquired; the minimum value of the reverse voltage and the corresponding target capacitance value are determined; and the adjuster is controlled to adjust the capacitance value of the variable capacitor to the target capacitance value. Based on this, by controlling the capacitance value of the variable capacitor to change in the preset range, the best matching point is determined according to the minimum value of the reverse voltage output by the solid-state source in the process, and automatic adjustment is realized, so that automatic tuning of the ultrashort wave therapeutic instrument is realized, manual operation is not needed, the precision and efficiency of impedance matching are improved, human intervention is reduced, and the convenience and reliability of equipment use are improved.

Description

Technical Field

[0001] This invention relates to the field of automatic control, and in particular to a tuning method and apparatus for an ultra-shortwave therapy device. Background Technology

[0002] An ultra-shortwave therapy device is a medical device that uses high-frequency electromagnetic waves to act on the human body, achieving therapeutic purposes through thermal and non-thermal effects. Its core working principle is: an ultra-shortwave signal is generated by a high-frequency power source, transmitted to the electrode plate through a tuning circuit, and the electrode plate radiates energy to human tissue.

[0003] Most existing shortwave diathermy devices use vacuum tubes as the high-frequency power source, coupled with a manual tuner to achieve impedance matching. The structure is as follows: a high-voltage DC power supply powers the vacuum tube, which generates a high-frequency oscillation signal, which is sent to the electrode plates via a tuner. The tuner contains an internal variable air capacitor, whose capacitance is manually adjusted via a knob. Simultaneously, a sampling resistor is connected in series in the circuit between the high-voltage DC power supply and the vacuum tube. The detected DC signal drives an indicator meter; a larger deflection of the meter needle indicates a higher output strength and better impedance matching. The operator observes the meter needle and manually rotates the knob to find the point of maximum deflection, which is considered the optimal operating point.

[0004] However, the above solution requires manual tuning before each use, which is complicated and requires a high level of experience from the operator.

[0005] Therefore, how to achieve automatic tuning of the ultra-shortwave therapy device is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to provide a tuning method and device for an ultra-shortwave therapy device. By controlling the capacitance value of a variable capacitor to change within a preset range, the optimal matching point is determined based on the minimum value of the reverse voltage output by the solid-state source during this process, and automatic adjustment is performed. This achieves automatic tuning of the ultra-shortwave therapy device without the need for manual operation, improving the accuracy and efficiency of impedance matching, while reducing human intervention and enhancing the convenience and reliability of the equipment.

[0007] To solve the above-mentioned technical problems, the present invention provides a tuning method for an ultra-shortwave therapy device, comprising: The solid-state source outputs a target high-frequency signal to a tuning circuit; wherein the tuning circuit includes a variable capacitor driven by a regulator; The regulator controls the variable capacitor to change its capacitance value within a preset range; The reverse voltage output by the solid-state source in real time during the change of the capacitance value of the variable capacitor is obtained; Determine the minimum value of the reverse voltage and its corresponding target capacitance value; The regulator is controlled to adjust the capacitance value of the variable capacitor to the target capacitance value.

[0008] Preferably, it further includes: A preset adjustment threshold is determined based on the minimum value of the reverse voltage, and the preset adjustment threshold is greater than the minimum value of the reverse voltage. The current reverse voltage output by the solid-state source is acquired in real time; When the current reverse voltage is greater than or equal to the preset adjustment threshold, the regulator is re-controlled to adjust the capacitance of the variable capacitor until the current reverse voltage recovers to less than the preset adjustment threshold.

[0009] Preferably, determining the preset adjustment threshold based on the minimum value of the reverse voltage includes: The product of the minimum value of the reverse voltage and a preset ratio is determined as the preset adjustment threshold, where the preset ratio is greater than 1.

[0010] Preferably, the regulator includes a motor driver and a motor; After acquiring the current reverse voltage output by the solid-state source in real time, the method further includes: The current reverse voltage output by the solid-state source is acquired in real time; When the current reverse voltage is less than the preset adjustment threshold, the motor driver is controlled to enter a sleep state.

[0011] Preferably, after determining the minimum value of the reverse voltage, the method further includes: Determine whether the minimum value of the reverse voltage is less than a preset voltage threshold; If it is less than, then determine the target capacitance value corresponding to the minimum value of the reverse voltage; If the value is not less than the specified value, then control the solid-state source to stop outputting.

[0012] To solve the above-mentioned technical problems, the present invention provides a tuning device for an ultra-shortwave therapy instrument, comprising: Memory, used to store computer programs; A controller is used to implement the steps of the tuning method of the ultra-shortwave therapy device as described above when executing a computer program.

[0013] Preferably, it further includes: A solid-state source is used to output the target high-frequency signal to the tuning circuit and to output a reverse voltage characterizing the reflected power to the controller; A regulator, connected to the controller, is used to drive the variable capacitor to change its capacitance value according to the control of the controller. The tuning circuit includes the variable capacitor and is connected to the solid-state source for matching the target high-frequency signal output by the solid-state source to the load.

[0014] Preferably, the regulator includes a motor and a motor driver.

[0015] Preferably, the tuning circuit further includes a magnetic ring and a first coil, a second coil, and a third coil wound on the magnetic ring; The input terminal of the second coil is connected to the output terminal of the solid-state source; One end of the first coil and one end of the third coil are respectively connected to the two ends of the variable capacitor; The other ends of the first coil and the third coil are respectively connected to the first electrode plate and the second electrode plate; The first coil, the second coil, and the third coil are wound in the same direction on the magnetic ring.

[0016] Preferably, it also includes a matching capacitor; The matching capacitor is connected between the first electrode plate and the second electrode plate.

[0017] This application provides a tuning method and apparatus for a shortwave diathermy device. The method involves controlling a solid-state source to output a target high-frequency signal to a tuning circuit, which includes a variable capacitor driven by a regulator. The method involves controlling the regulator to change the capacitance value of the variable capacitor within a preset range; acquiring the real-time reverse voltage output by the solid-state source during the capacitance change process; determining the minimum value of the reverse voltage and its corresponding target capacitance value; and controlling the regulator to adjust the capacitance value of the variable capacitor to the target capacitance value. Based on this, by controlling the capacitance value of the variable capacitor to change within a preset range, and determining the optimal matching point based on the minimum value of the reverse voltage output by the solid-state source during this process, automatic tuning of the shortwave diathermy device is achieved. This eliminates the need for manual operation, improves the accuracy and efficiency of impedance matching, reduces human intervention, and enhances the convenience and reliability of the equipment. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic flowchart of a tuning method for an ultra-shortwave therapy device provided in this application; Figure 2 This is a schematic diagram of the adjustment device in a conventional shortwave diathermy device. Figure 3 A schematic diagram of the tuning system of an ultra-shortwave therapy device provided in this application; Figure 4 A schematic diagram of the tuning device of an ultra-shortwave therapy device provided in this application; Figure 5 A schematic diagram of the specific structure of the tuning device of an ultra-shortwave therapy device provided in this application; Figure 6 A schematic diagram of a tuning circuit provided in this application; Figure 7 This is a schematic diagram of the structure of a computer-readable storage medium provided in this application. Detailed Implementation

[0020] The core of this invention is to provide a tuning method and device for an ultra-shortwave therapy device. By controlling the capacitance value of a variable capacitor to change within a preset range, the optimal matching point is determined based on the minimum value of the reverse voltage output by the solid-state source during this process, and automatic adjustment is performed. This achieves automatic tuning of the ultra-shortwave therapy device without the need for manual operation, improving the accuracy and efficiency of impedance matching, while reducing human intervention and enhancing the convenience and reliability of the equipment.

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

[0022] Please refer to Figure 1 , Figure 1 A flowchart illustrating a tuning method for an ultra-shortwave therapy device provided in this application, the method comprising: S11: Control the solid-state source 51 to output the target high-frequency signal to the tuning circuit; wherein, the tuning circuit includes a variable capacitor C1 driven by the regulator; In existing technologies, such as Figure 2 As shown, Figure 2 This is a schematic diagram of the adjustment device in a conventional shortwave diathermy device. Figure 2The ultra-shortwave therapy devices typically use a high-voltage DC power supply, vacuum tubes, and a manual tuner as core components. Operators manually rotate a knob to change the capacitance of the air capacitor, while simultaneously observing the deflection of the indicator needle to determine if the system is at its optimal operating point: a larger deflection indicates a better match and closer proximity to the optimal operating point. Initially, an optimal operating point can be found through manual operation. However, because the entire system is an open-loop structure, slight changes in the load during use can shift the previously adjusted operating point, leading to a decrease in output energy transmission efficiency. This necessitates the operator manually rotating the knob again to find the optimal matching point. This manual tuning method is cumbersome, cannot track load changes in real time, and the device cannot consistently maintain an optimal matching state during operation, resulting in lower energy conversion efficiency and increased frequency of manual intervention.

[0023] In this application, the solid-state source 51 is composed of a transistor oscillator circuit and a regulated power supply, capable of outputting a high-frequency signal with stable frequency and adjustable power. The solid-state source 51 is controlled to output a target high-frequency signal with a target frequency (e.g., 40.68MHz) and target power, which is transmitted to the tuning circuit via a cable. The tuning circuit includes a variable capacitor C1, the value of which can be continuously changed by a regulator. By setting the target frequency and target power, the subsequent tuning process can be ensured to proceed under preset operating conditions, avoiding the influence of source output instability on the matching result judgment. Based on this, the solid-state source 51 replaces the traditional vacuum tube, providing a stable and controllable high-frequency energy input for the entire system.

[0024] S12: Controls the regulator to drive the variable capacitor C1 to change its capacitance value within a preset range; The regulator is mechanically connected to the rotating shaft of the variable capacitor C1. In this embodiment, the regulator can be a stepper motor or a DC motor, and its rotation is controlled by pulse or voltage signals issued by the controller 42. The preset range refers to the entire physical angle range covered by the minimum and maximum capacitance values ​​of the variable capacitor C1. The controller 42 issues a command to cause the regulator to drive the variable capacitor C1 to rotate unidirectionally from the minimum capacitance value to the maximum capacitance value, or from the maximum capacitance value to the minimum capacitance value, or to rotate back and forth between the two. This rotation process causes a continuous change in the equivalent impedance of the tuning circuit, thereby changing the load matching state seen by the solid-state source 51. Based on this, by automatically driving the variable capacitor C1 to scan the entire capacitance range, the manual rotation of the knob is replaced, which facilitates the automatic search for the optimal matching point.

[0025] S13: Obtain the reverse voltage output in real time by the solid-state source 51 during the capacitance change of the variable capacitor C1; The solid-state source 51 typically integrates a directional coupler or a reflected power detection circuit, which can output a DC voltage signal proportional to the reflected power, i.e., the reverse voltage. The magnitude of this reverse voltage directly reflects the degree of matching between the current tuning circuit and the load: the smaller the reverse voltage, the less reflected energy and the higher the energy transfer efficiency; the larger the reverse voltage, the more severe the mismatch. During the process of the regulator driving the variable capacitor C1 to scan the capacitance value, the controller 42 continuously samples the reverse voltage value output by the solid-state source 51, for example, sampling once every time the step angle changes, and records the sampled value corresponding to the current capacitor position.

[0026] S14: Determine the minimum value of the reverse voltage and its corresponding target capacitance value; The controller 42 compares all recorded reverse voltage values ​​and identifies the minimum reverse voltage, which corresponds to the optimal matching state throughout the scanning process. Simultaneously, the controller 42 records the position information of the regulator when this minimum value occurs, such as the number of steps or angle of the stepper motor. This position information can be converted into the specific capacitance value of the variable capacitor C1, called the target capacitance value. Since the reverse voltage has a monotonic relationship with the degree of matching, generally, the greater the mismatch, the higher the reverse voltage. The minimum value is a reliable criterion for the optimal matching point. Based on this, the optimal operating point can be automatically determined through simple numerical comparison, eliminating the need for manual observation of the meter needle or judgment based on experience, thus improving the objectivity and accuracy of the matching.

[0027] S15: The controller adjusts the capacitance of variable capacitor C1 to the target capacitance value.

[0028] Based on the position information corresponding to the obtained target capacitance value, controller 42 sends a rotation command to the regulator, causing the regulator to drive the variable capacitor C1 back to the position information corresponding to the target capacitance value and stop. At this point, the tuning circuit is set to minimize the reverse voltage of the solid-state source 51, thus achieving automatic impedance matching. Subsequently, most of the high-frequency energy output by the solid-state source 51 is transferred to the electrode plate and acts on the load, minimizing reflected power. Based on this, the system automatically locks at the optimal matching point. The entire process requires no manual intervention and can be executed automatically each time the device is started. It can also repeat the above steps for retuning after load changes, thereby ensuring that the device always operates in a high-efficiency transmission state. This application does not limit this aspect.

[0029] In summary, by controlling the capacitance value of the variable capacitor C1 to vary within a preset range, and determining the optimal matching point based on the minimum value of the reverse voltage output by the solid-state source 51 during this process, the automatic tuning of the ultra-shortwave therapy device is achieved. This eliminates the need for manual operation, improves the accuracy and efficiency of impedance matching, reduces human intervention, and enhances the convenience and reliability of the equipment.

[0030] Based on the above embodiments: As a preferred embodiment, it also includes: A preset adjustment threshold is determined based on the minimum value of the reverse voltage, and the preset adjustment threshold is greater than the minimum value of the reverse voltage. Real-time acquisition of the current reverse voltage output by the solid-state source 51; When the current reverse voltage is greater than or equal to the preset adjustment threshold, the regulator is re-controlled to adjust the capacitance value of the variable capacitor C1 until the current reverse voltage recovers to less than the preset adjustment threshold.

[0031] After initial tuning is completed and the variable capacitor C1 is adjusted to the target capacitance value, the device enters normal operating mode. Considering that in actual use, the load connected to the electrode plate may move in position or change in attitude, causing the originally matched operating point to shift, this embodiment further provides a closed-loop holding method.

[0032] First, a preset adjustment threshold is set based on the aforementioned minimum reverse voltage. This minimum value is the reverse voltage at the optimal matching point recorded during the initial capacitance scan, reflecting the lowest reflected energy achievable under the current load. The preset adjustment threshold is set to a value greater than this minimum value. For example, it can be determined by multiplying the minimum value by a coefficient greater than 1 (such as 1.1), or by adding a fixed voltage offset to the minimum value; this application does not limit this. The physical meaning of the preset adjustment threshold is: to allow the reverse voltage to fluctuate within a certain range without triggering retuning, thereby avoiding frequent regulator operation due to minor disturbances. The specific value of the preset adjustment threshold can be preset and stored in memory according to the different output power and load characteristics of the solid-state source 51; this application does not limit this.

[0033] Secondly, during device operation, the controller 42 continuously acquires the current reverse voltage output from the solid-state source 51. The reverse voltage detection circuit inside the solid-state source 51 remains operational, outputting a DC voltage signal proportional to the current reflected power in real time, regardless of whether tuning is in progress. The controller 42 reads this voltage value at a fixed sampling period and compares it with the aforementioned preset adjustment threshold.

[0034] When the controller 42 detects that the current reverse voltage is greater than or equal to the preset adjustment threshold, it determines that the current matching state has deteriorated significantly and retuning is required. At this time, the controller 42 sends a command to the regulator to drive the variable capacitor C1 to change its capacitance value again. The change in the capacitance value of the variable capacitor C1 will change the matching state of the tuning circuit, thereby affecting the reverse voltage detected by the solid-state source 51. During the adjustment process, the controller 42 continuously monitors the reverse voltage. Once it finds that the reverse voltage has recovered to a range below the preset adjustment threshold, or that the reverse voltage has recovered to the minimum value, it immediately stops the regulator, keeping the variable capacitor C1 at its current capacitance value. If the reverse voltage cannot be reduced below the preset adjustment threshold during the adjustment process, the controller 42 can control the variable capacitor C1 to rescan within the preset range, repeatedly searching for the capacitor position corresponding to the new minimum value, or directly control the shortwave diathermy device to stop.

[0035] In this way, when the load impedance changes due to movement or other reasons, the system can automatically detect the increase in reverse voltage and automatically retune, ensuring that the equipment always operates near the matching point of minimum reverse voltage. This process requires no manual intervention or interruption of equipment operation, guaranteeing the continuity and stability of energy transmission. Simultaneously, by introducing a preset adjustment threshold greater than the minimum value, frequent activation of the regulator is avoided when there are small fluctuations in reverse voltage, thus extending the service life of the regulator and variable capacitor C1.

[0036] As a preferred embodiment, determining a preset adjustment threshold based on the minimum value of the reverse voltage includes: The product of the minimum reverse voltage and the preset ratio is determined as the preset adjustment threshold, and the preset ratio is greater than 1.

[0037] The aforementioned preset adjustment threshold can be calculated based on the determined minimum reverse voltage value. Specifically, the controller 42 internally stores a preset ratio, which is a constant greater than 1, such as 1.1, 1.2, or other values ​​set according to the actual load fluctuation range; this application does not limit this value. Multiplying the minimum reverse voltage value by the preset ratio yields the preset adjustment threshold. The minimum reverse voltage value reflects the reflected energy level corresponding to the optimal matching state that the system can achieve under the current load conditions. Since the load will change to a certain extent during use, but not every small change requires retuning, setting a threshold greater than the minimum value allows the reverse voltage to fluctuate within a certain range without triggering adjustment. The setting method of the preset adjustment threshold has clear calculation rules, does not rely on human experience, and can adjust the size of the preset ratio according to different usage scenarios to control the adjustment sensitivity: the closer the ratio is to 1, the more sensitive the system is to load changes, and the more frequent the adjustment; the larger the ratio, the stronger the system's fault tolerance, and the fewer the adjustment times. The preset adjustment threshold is determined using a multiplication method, ensuring a fixed proportional relationship between the preset adjustment threshold and the minimum value. This avoids the problem of excessive relative deviation that may occur when using a fixed offset. For example, if the minimum value is small, a fixed offset might cause the preset adjustment threshold to be too large, rendering it ineffective for protection. In this way, the system can reduce unnecessary adjustment actions and extend the service life of the regulator and variable capacitor C1 while ensuring matching quality.

[0038] In a preferred embodiment, the regulator includes a motor driver 531 and a motor 532; After acquiring the current reverse voltage output by the solid-state source 51 in real time, the following is also included: The current reverse voltage output by the solid-state source 51 is acquired in real time; When the current reverse voltage is less than the preset adjustment threshold, the motor driver 531 is controlled to enter a sleep state.

[0039] In this embodiment, the regulator can be composed of two parts: a motor driver 531 and a motor 532. The motor driver 531 receives control signals from the controller 42, such as direction signals and step pulse signals, and converts them into current or voltage waveforms suitable for driving the motor 532. The motor 532 is mechanically connected to the shaft of the variable capacitor C1 and is used to drive the variable capacitor C1 to change its capacitance value.

[0040] During normal operation of the equipment, the controller 42 acquires the current reverse voltage output by the solid-state source 51 in real time and compares it with a preset adjustment threshold. When the controller 42 determines that the current reverse voltage is less than the preset adjustment threshold, it indicates that the current matching state is good and no adjustment of the capacitance value of the variable capacitor C1 is required. At this time, the controller 42 sends a sleep command to the motor driver 531. After receiving the sleep command, the motor driver 531 stops outputting drive current to the motor 532 and puts most of its internal functional modules into a low-power state, but still retains the ability to receive wake-up signals. The motor 532 stops rotating after losing drive current and maintains its current mechanical position.

[0041] By setting a sleep state, the power consumption of the motor driver 531 and the motor 532 can be significantly reduced during periods when tuning is not required, thus reducing the overall heat generation of the system and preventing the motor 532 from being in a standby power-on state for extended periods, which could lead to coil overheating or shortened lifespan. When the controller 42 detects that the current reverse voltage has reached or exceeded the preset adjustment threshold again, the controller 42 can send a wake-up signal to reactivate the motor driver 531, restoring it to normal operating status. This on-demand operation mode ensures that the motor 532 and its drive circuit consume power only when necessary, making it suitable for ultra-shortwave therapy equipment that requires long-term continuous operation.

[0042] As a preferred embodiment, after determining the minimum value of the reverse voltage, the method further includes: Determine whether the minimum value of the reverse voltage is less than a preset voltage threshold; If it is less than, then determine the target capacitance value corresponding to the minimum value of the reverse voltage; If the value is not less than the specified value, then control the solid-state source 51 to stop outputting.

[0043] After determining the minimum reverse voltage, in this embodiment, the controller 42 further determines whether the minimum value is less than a preset voltage threshold pre-stored in the controller 42. This preset voltage threshold is a fixed voltage value, set based on the upper limit of the reverse voltage corresponding to the maximum reflected power that the solid-state source 51 can withstand, or an allowable value set according to safety specifications. For example, the specifications of the solid-state source 51 typically provide an allowable maximum reflected power value, which is converted by the reverse voltage detection circuit inside the solid-state source 51 to obtain the preset voltage threshold. If the minimum reverse voltage is less than the preset voltage threshold, it indicates that during the entire capacitance value scan process, the system has at least one matching point where the reflected energy is within a safe and acceptable range. At this time, the controller 42 determines the target capacitance value corresponding to the minimum value and continues to execute the subsequent steps of adjusting the variable capacitor C1 to the target capacitance value.

[0044] If the minimum reverse voltage is greater than or equal to the preset voltage threshold, it indicates that the reverse voltage detected by the solid-state source 51 is still too high even after a full-range scan of the variable capacitor C1. This means there is an abnormality in the tuning circuit or the load, such as improper connection of the electrode plates, short circuit between the electrode plates, or a fault in the internal components of the tuning circuit. In this case, the controller 42 sends a stop output command to the solid-state source 51 through the control terminal to shut down the high-frequency output of the solid-state source 51, so as to avoid damage or performance degradation of the internal power transistors of the solid-state source 51 due to excessive reflected power.

[0045] By setting this judgment and protection step, system anomalies can be detected in time before the equipment is started or during the tuning process, preventing the solid-state source 51 from being damaged due to prolonged operation in a mismatched state, thus improving the reliability and safety of the entire equipment.

[0046] The following is a specific embodiment for illustration: The target frequency of the high-frequency signal output by the ultra-shortwave therapy device is 40.68MHz, and the target power is 100W, meaning the solid-state source 51 outputs 100W. When connected to a 50-ohm load, the solid-state source 51 detects a forward voltage of 2V and a minimum reverse voltage of 0.5V. When the two electrodes of the electrode plate are applied to the load, the controller 42 adjusts the capacitance of the variable capacitor C1, simultaneously acquiring the forward and reverse voltages output by the solid-state source 51. When the reverse voltage approaches 0.5V, the solid-state source 51 outputs its maximum power, and most of the ultra-shortwave energy can be applied to the load. When the motor 532 rotates one revolution and the reverse voltage consistently exceeds the preset threshold voltage (e.g., 1.0V), a problem exists in the entire tuning system. The controller 42 can then shut down the output of the solid-state source 51 to protect it, and the device will not operate. When the load moves, the reverse voltage change can be detected in real time. The system automatically rotates the motor 532 to keep the reverse voltage between 0.5-0.55V and the equipment is working normally. When the reverse voltage reaches 0.55V but is less than 1.0V, the controller 42 is triggered to adjust the rotation of the motor 532, thereby adjusting the capacitance of the variable capacitor so that the reverse voltage is maintained within 0.55V.

[0047] Please refer to Figure 3 , Figure 3 This application provides a schematic diagram of the structure of a tuning system for an ultra-shortwave therapy device, the system comprising: The first control unit 31 is used to control the solid-state source 51 to output a target high-frequency signal to the tuning circuit; wherein, the tuning circuit includes a variable capacitor C1 driven by a regulator; The second control unit 32 is used to control the capacitance value of the regulator-driven variable capacitor C1 to change within a preset range; The acquisition unit 33 is used to acquire the reverse voltage output in real time by the solid source 51 during the change of the capacitance value of the variable capacitor C1; Determining unit 34 is used to determine the minimum value of the reverse voltage and its corresponding target capacitance value; The third control unit 35 is used to control the regulator to adjust the capacitance value of the variable capacitor C1 to the target capacitance value.

[0048] For a description of the tuning system of the ultra-shortwave therapy device provided by the present invention, please refer to the above method embodiments; the present invention will not be described again here.

[0049] Please refer to Figure 4 , Figure 4 This application provides a schematic diagram of the structure of a tuning device for an ultra-shortwave therapy device, the device comprising: Memory 41 is used to store computer programs; The controller 42 is used to implement the steps of the tuning method of the ultra-shortwave therapy device as described above when executing a computer program.

[0050] For a description of the tuning device of the ultra-shortwave therapy device provided by the present invention, please refer to the above method embodiments; the present invention will not be described again here.

[0051] As a preferred embodiment, it also includes: Solid-state source 51 is used to output the target high-frequency signal to the tuning circuit and output a reverse voltage characterizing the reflected power to the controller 42. The regulator, connected to the controller 42, is used to drive the variable capacitor C1 to change its capacitance value according to the control of the controller 42. The tuning circuit, including a variable capacitor C1, is connected to the solid-state source 51 and is used to match the target high-frequency signal output by the solid-state source 51 to the load.

[0052] Please refer to Figure 5 , Figure 5 This application provides a schematic diagram of the specific structure of a tuning device for a shortwave diathermy device. The tuning device includes a solid-state source 51, a regulator, and a tuning circuit. The solid-state source 51 is constructed using a transistor oscillator circuit and a regulated power supply. Its output is connected to the input of the tuning circuit via a coaxial cable. The solid-state source 51 integrates a directional coupler, which couples out a portion of the output power and converts it into a DC voltage signal via a detector circuit. The voltage signal characterizing the reflected power is called the reverse voltage, which is transmitted to the controller 42 via a separate signal line. The target high-frequency signal output by the solid-state source 51 can be 40.68MHz, and the output power can be adjusted within a certain range according to the instructions of the controller 42. As an energy source, the solid-state source 51 provides a frequency-stable and power-controllable high-frequency excitation for the entire system.

[0053] The regulator and controller 42 are connected via an electrical signal. Directional commands and drive pulses issued by controller 42 are transmitted to the regulator through this connection. The regulator may contain, but is not limited to, a motor driver 531 and a motor 532. The motor driver 531 converts the low-level control signals from controller 42 into the drive current required for the windings of motor 532. The output shaft of the regulator is mechanically coupled to the shaft of the variable capacitor C1 in the tuning circuit via a coupling or gear mechanism. When controller 42 issues a rotation command, the regulator drives the variable capacitor C1 to rotate, thereby changing the capacitance value of variable capacitor C1. The regulator's response speed and rotational accuracy determine the speed and positioning accuracy of the tuning.

[0054] The tuning circuit includes a variable capacitor C1. One end of C1 is connected to the signal output path of the solid-state source 51, and the other end is connected to the load, such as an electrode plate or a subsequent matching network. The capacitance of C1 changes continuously with the rotation of the regulator, and the overall impedance of the tuning circuit changes accordingly. The input of the tuning circuit is connected to the output of the solid-state source 51. After the target high-frequency signal output from the solid-state source 51 enters the tuning circuit, the load impedance seen by the solid-state source 51 changes due to the matching effect of the variable capacitor C1 and other components in the circuit. The function of the tuning circuit is to match the output impedance of the solid-state source 51 with the actual impedance of the load to reduce reflected power and improve energy transfer efficiency. When the impedance of the tuning circuit is conjugate matched with the output impedance of the solid-state source 51, the reverse voltage detected by the solid-state source 51 is minimized, and most of the high-frequency energy is transferred to the load.

[0055] With the cooperation of the solid-state source 51, regulator, and tuning circuit, the controller 42 can automatically scan and position the variable capacitor C1 according to the preset tuning logic, realizing automatic impedance matching adjustment without the need for manual rotation of the knob. This tuning device has a simple structure and fast response, and can track load changes and re-match in real time without interrupting equipment operation, ensuring the continuity and stability of energy transmission.

[0056] It should be noted that, Figure 5 In this circuit, the sCTRL terminal of the controller 42 is connected to the sCTRL terminal of the solid-state source 51. When the sCTRL terminal of the controller 42 outputs a high level, the solid-state source 51 operates normally, outputting the target high-frequency signal RF_IN through the RF_OUT terminal, and outputting a positive voltage to the controller 42 through the F_IN terminal, and an inverse voltage to the controller 42 through the R_IN terminal. The positive voltage is used to enable the controller 42 to determine whether the solid-state source 51 is in a normal operating state. When the sCTRL terminal of the controller 42 outputs a low level, the solid-state source 51 stops working. Specifically, it can output a low level when the minimum value of the inverse voltage is not less than a preset voltage threshold.

[0057] In a preferred embodiment, the regulator includes a motor 532 and a motor driver 531.

[0058] In this embodiment, the regulator includes a motor 532 and a motor driver 531. The motor driver 531 is connected to the controller 42 via a signal line and is used to receive direction signals and step pulse signals, or speed commands, issued by the controller 42, and convert these low-level control signals into the drive current required by the motor windings. The output terminal of the motor driver 531 is connected to the windings of the motor 532, and provides the motor 532 with currents of different timing and amplitude according to the control commands, so that the motor 532 rotates in a set direction and step angle. The motor 532 is mechanically coupled to the shaft of the variable capacitor C1 through a coupling or gear assembly, and the rotation angle and direction of the motor 532 are directly transmitted to the variable capacitor C1, thereby changing its capacitance value.

[0059] Motor 532 can be a stepper motor. A stepper motor rotates by a fixed step angle, such as 1.8°, driven by each pulse signal. Therefore, controller 42 can precisely control the rotational position of variable capacitor C1 based on the number of pulses emitted, without the need for an additional position sensor. Motor driver 531 may, but is not limited to, include an H-bridge circuit and a current sensing resistor, providing sufficient drive current and overcurrent protection. When controller 42 needs to scan the entire capacitance range of variable capacitor C1, motor driver 531 continuously outputs drive pulses to motor 532, causing motor 532 to rotate at a constant speed. When it is necessary to lock variable capacitor C1 at a target capacitance value, motor driver 531 stops outputting current, and motor 532 remains stationary.

[0060] By dividing the regulator into two parts, motor 532 and motor driver 531, control signal processing and mechanical rotation execution can be separated, which is beneficial for optimizing circuit board layout and heat dissipation design. Motor driver 531 can be placed close to controller 42 to shorten signal line length and reduce electromagnetic interference; motor 532 can be mounted close to variable capacitor C1 to shorten the transmission path and improve the rigidity and positioning accuracy of mechanical transmission. Furthermore, different motor drivers 531 can be selected to accommodate motors 532 of different specifications without changing the main control logic of controller 42, enhancing the system's scalability and versatility.

[0061] like Figure 5As shown, the controller 42 outputs low-level control signals, such as direction signals and step pulse signals, from its IN1, IN2, IN3, and IN4 terminals to the motor driver 531. This causes the motor driver 531 to convert the low-level control signals into drive current, which is then output to the A+, A-, B+, and B- terminals of the motor 532 via its OUT1, OUT2, OUT3, and OUT4 terminals to drive the motor 532. The controller 42's nSLEEP terminal is connected to the motor driver 531's nSLEEP terminal. When the controller 42's nSLEEP terminal outputs a low level, the motor driver 531 enters a sleep mode to stop driving the motor 532. When the controller 42's nSLEEP terminal outputs a high level, the motor driver 531 enters a working mode to continue driving the motor 532. The nFAULT terminal of the controller 42 is connected to the nFAULT terminal of the motor driver 531. When the controller 42 detects a fault or other fault in the motor driver 531, the nFAULT terminal outputs a low level to control the motor driver 531 to stop working; or when the controller 42 needs to perform fault detection on the motor driver 531, it can output a low level on the nFAULT terminal to make the motor driver 531 enter the fault detection mode.

[0062] In a preferred embodiment, the tuning circuit further includes a magnetic ring and a first coil L1, a second coil L2, and a third coil L3 wound on the magnetic ring; The input terminal of the second coil L2 is connected to the output terminal of the solid-state source 51; One end of the first coil L1 and the third coil L3 are respectively connected to the two ends of the variable capacitor C1; The other ends of the first coil L1 and the third coil L3 are respectively connected to the first electrode plate and the second electrode plate; The first coil L1, the second coil L2, and the third coil L3 are wound in the same direction on the magnetic ring.

[0063] Please refer to Figure 6 , Figure 6 This is a schematic diagram of a tuning circuit provided in this application. Figure 6 In this context, P1 and P2 represent two electrode plates, respectively.

[0064] In this embodiment, the tuning circuit further includes a magnetic ring and a first coil L1, a second coil L2, and a third coil L3 wound on the magnetic ring. The magnetic ring can be, but is not limited to, made of nickel-zinc ferrite material, whose permeability is much higher than that of air, which can confine the magnetic lines of force generated by the coils inside the magnetic ring and improve the coupling coefficient between the coils. All three coils are wound with wire of the same diameter, for example, 2 mm, and the number of turns of each coil can be equal, for example, 3 turns each. The input terminal of the second coil L2 serves as the signal input port of the tuning circuit and is directly connected to the output terminal of the solid-state source 51. When the target high-frequency signal output by the solid-state source 51 flows into the second coil L2, an alternating magnetic field is generated inside the magnetic ring. Since the first coil L1 and the third coil L3 are also wound on the same magnetic ring, this alternating magnetic field will induce voltages in the first coil L1 and the third coil L3, respectively.

[0065] One end of the first coil L1 and the third coil L3 are respectively connected to the two ends of the variable capacitor C1, and the other ends of the first coil L1 and the third coil L3 are respectively connected to the first electrode plate and the second electrode plate. Thus, the second coil L2, the magnetic ring, the first coil L1, and the third coil L3 together constitute a coupling transformer structure. The second coil L2 serves as the primary side, receiving high-frequency energy from the solid-state source 51; the first coil L1 and the third coil L3 serve as the secondary side, transferring energy to the electrode plates and ultimately acting on the load. The variable capacitor C1 is connected between the first coil L1 and the third coil L3, forming a resonant network with the inductance of the first coil L1 and the third coil L3. By changing the capacitance of the variable capacitor C1, the resonant frequency and impedance transformation ratio of this resonant network can be adjusted.

[0066] The first coil L1, the second coil L2, and the third coil L3 are wound in the same direction on the magnetic ring. With the center of the magnetic ring as a reference, all three coils are wound either clockwise or counterclockwise. Consistent winding direction ensures a defined phase relationship between the induced voltages in each coil, preventing magnetic field cancellation or uncontrollable phase differences caused by different winding directions. Specifically, when the current direction in the second coil L2 is determined, the induced voltages in the first coil L1 and the third coil L3 have the same polarity, which helps maintain a balanced signal output from the two electrode plates. If the winding direction of one coil is opposite to the others, its induced voltage polarity will reverse, potentially causing the signals output from the electrode plates to be out of phase or inconsistent, thus affecting energy transfer efficiency.

[0067] Through the above structure, the tuning circuit simultaneously achieves three functions: first, it efficiently transfers the energy of the solid-state source 51 to the electrode plate through magnetic ring coupling; second, it utilizes the variable capacitor C1 and the coil inductance to form a resonant matching network, enabling the solid-state source 51 to obtain a low reflected voltage at its output; and third, the design of three coils sharing a common magnetic ring and having the same winding direction ensures the balance of the output signal and the consistency of coupling. This structure avoids the use of discrete, large-volume inductor components, which helps to reduce the circuit board area and lower parasitic parameters.

[0068] In a preferred embodiment, a matching capacitor C2 is also included; Matching capacitor C2 is connected between the first electrode plate and the second electrode plate.

[0069] In a preferred embodiment, the tuning circuit described above may further include a matching capacitor C2. This matching capacitor C2 is connected between the first and second electrode plates, i.e., in parallel between the signal input terminals of the two electrode plates. The capacitance of the matching capacitor C2 is a fixed value, for example, 39pF. Its specific value can be pre-selected based on the typical impedance range of the load to be connected and the adjustment range of the variable capacitor C1; this application does not limit this. When the electrode plates are in contact with the load, the equivalent impedance of the load typically presents as a parallel or series connection of resistance and capacitance. The addition of the matching capacitor C2 can transform this equivalent impedance to a range more easily fine-tuned by the variable capacitor C1. Specifically, the matching capacitor C2 is connected in parallel with the equivalent capacitance of the electrode plates and the load, changing the overall capacitance value at the output of the tuning circuit, thereby relatively reducing the range that the variable capacitor C1 needs to change during adjustment. The advantage of this structure is that a variable capacitor C1 with a smaller capacitance range can cover the required matching range, and the size of the variable capacitor C1 can be correspondingly reduced, which is beneficial for the overall miniaturization of the device. Meanwhile, the matching capacitor C2 shares some of the impedance matching workload, reducing the adjustment burden on the variable capacitor C1 and making the tuning process smoother. Furthermore, the matching capacitor C2 has a fixed value and does not involve mechanical adjustment, thus not increasing control complexity; it is also low-cost and highly reliable. By placing this matching capacitor C2 between the first and second electrode plates, combined with the coordinated adjustment of the variable capacitor C1, the entire tuning circuit can adapt to different load changes, improving the flexibility and efficiency of matching.

[0070] Please refer to Figure 7 , Figure 7 This is a schematic diagram of a computer-readable storage medium provided in this application. The computer-readable storage medium 71 stores a computer program 72, which, when executed by the controller 42, implements the steps of the tuning method for the ultra-shortwave therapy device as described above.

[0071] For a description of the computer-readable storage medium provided by the present invention, please refer to the above method embodiments; the present invention will not be described again here.

[0072] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tuning method for a shortwave diathermy device, characterized in that, include: The solid-state source outputs a target high-frequency signal to a tuning circuit; wherein the tuning circuit includes a variable capacitor driven by a regulator; The regulator controls the variable capacitor to change its capacitance value within a preset range; The reverse voltage output by the solid-state source in real time during the change of the capacitance value of the variable capacitor is obtained; Determine the minimum value of the reverse voltage and its corresponding target capacitance value; The regulator is controlled to adjust the capacitance value of the variable capacitor to the target capacitance value.

2. The tuning method of the ultra-shortwave therapy device as described in claim 1, characterized in that, Also includes: A preset adjustment threshold is determined based on the minimum value of the reverse voltage, and the preset adjustment threshold is greater than the minimum value of the reverse voltage. The current reverse voltage output by the solid-state source is acquired in real time; When the current reverse voltage is greater than or equal to the preset adjustment threshold, the regulator is re-controlled to adjust the capacitance of the variable capacitor until the current reverse voltage recovers to less than the preset adjustment threshold.

3. The tuning method of the ultra-shortwave therapy device as described in claim 2, characterized in that, Determining a preset adjustment threshold based on the minimum value of the reverse voltage includes: The product of the minimum value of the reverse voltage and a preset ratio is determined as the preset adjustment threshold, where the preset ratio is greater than 1.

4. The tuning method of the ultra-shortwave therapy device as described in claim 2, characterized in that, The regulator includes a motor driver and a motor; After acquiring the current reverse voltage output by the solid-state source in real time, the method further includes: The current reverse voltage output by the solid-state source is acquired in real time; When the current reverse voltage is less than the preset adjustment threshold, the motor driver is controlled to enter a sleep state.

5. The tuning method of the ultra-shortwave therapy device as described in any one of claims 1-4, characterized in that, After determining the minimum value of the reverse voltage, the method further includes: Determine whether the minimum value of the reverse voltage is less than a preset voltage threshold; If it is less than, then determine the target capacitance value corresponding to the minimum value of the reverse voltage; If the value is not less than the specified value, then control the solid-state source to stop outputting.

6. A tuning device for a shortwave diathermy device, characterized in that, include: Memory, used to store computer programs; A controller, used to implement the steps of the tuning method of the ultra-shortwave therapy device as described in any one of claims 1-5 when executing a computer program.

7. The tuning device of the ultra-shortwave therapy device as described in claim 6, characterized in that, Also includes: A solid-state source is used to output the target high-frequency signal to the tuning circuit and to output a reverse voltage characterizing the reflected power to the controller; A regulator, connected to the controller, is used to drive the variable capacitor to change its capacitance value according to the control of the controller. The tuning circuit includes the variable capacitor and is connected to the solid-state source for matching the target high-frequency signal output by the solid-state source to the load.

8. The tuning device of the ultra-shortwave therapy device as described in claim 7, characterized in that, The regulator includes a motor and a motor driver.

9. The tuning device of the ultra-shortwave therapy device as described in claim 7, characterized in that, The tuning circuit also includes a magnetic ring and a first coil, a second coil, and a third coil wound on the magnetic ring; The input terminal of the second coil is connected to the output terminal of the solid-state source; One end of the first coil and one end of the third coil are respectively connected to the two ends of the variable capacitor; The other ends of the first coil and the third coil are respectively connected to the first electrode plate and the second electrode plate; The first coil, the second coil, and the third coil are wound in the same direction on the magnetic ring.

10. The tuning device of the ultra-shortwave therapy device as described in claim 9, characterized in that, It also includes matching capacitors; The matching capacitor is connected between the first electrode plate and the second electrode plate.

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