Modulation method of ultrasonic output pulse, controller and therapeutic instrument

Abstract

The application discloses a method for modulating ultrasonic output pulses, a controller and a therapeutic instrument. The method comprises the following steps: S10, obtaining an output frequency f2 of a first preset pulse, and modulating a to-be-modulated pulse according to the output frequency f2 of the first preset pulse to obtain a first pulse train; S20, obtaining a cycle length t0 of a second preset pulse, and dividing the first pulse train into N second pulse trains according to the cycle length t0 of the second preset pulse; and S30, controlling a transducer to sequentially output the N second pulse trains. The application improves the energy uniformity of a treatment area, reduces pain and improves treatment effect.

Description

Technical Field

[0001] This invention relates to the field of ultrasound therapy equipment, and in particular to a method for modulating ultrasound output pulses, a controller, and an ultrasound therapy instrument. Background Technology

[0002] High-intensity focused ultrasound (HIFU) differs from lasers and RF (Radio Frequency) devices in that it non-invasively concentrates energy on a selected area without causing any damage to the skin surface. Specifically, it focuses the emitted ultrasound waves at a specific location to generate heat, causing a rapid increase in temperature at the treatment site. This heating effect avoids side effects on various affected areas and induces coagulation necrosis of fat cells for treatment.

[0003] Ultrasound equipment emits focused ultrasound energy in the form of pulses, with each pulse creating a thermal diffusion zone within the target tissue. Most of the ultrasound energy output from the pulse is concentrated in the central region of this thermal diffusion zone, resulting in a narrow energy diffusion range. This affects the overall treatment effect across the entire treatment area. Furthermore, the excessive energy concentration leads to a higher central temperature, which can cause stinging sensations for patients, resulting in a poor user experience. Summary of the Invention

[0004] The main objective of this invention is to propose a modulation method, controller, and therapeutic instrument for ultrasonic output pulses, which aims to reduce pain and improve therapeutic efficacy by enhancing the energy uniformity of the treatment area.

[0005] To achieve the above objectives, this invention proposes a modulation method for ultrasonic output pulses, comprising the following steps:

[0006] Step S10: Obtain the output frequency f2 of the first preset pulse, and modulate the pulse to be modulated according to the output frequency f2 of the first preset pulse to obtain the first pulse train;

[0007] Step S20: Obtain the period length t0 of the second preset pulse, and divide the first pulse train into N second pulse trains according to the period length t0 of the second preset pulse;

[0008] Step S30: Control the transducer to output N second pulse trains in sequence.

[0009] Optionally, step S20 further includes the following steps:

[0010] Step S21: Obtain the pulse width of the period of the second preset pulse and the interval time of the period of the second preset pulse.

[0011] Step S22: Determine the period length t0 of the second preset pulse based on the pulse width of the period of the second preset pulse and the interval time of the period of the second preset pulse. Optionally, the pulse width of the period of the second preset pulse is less than the human pain nerve reaction time constant.

[0012] Optionally, the sum of the pulse widths of the periods t0 of the N second preset pulses is the same as the sum of the pulse widths of the periods T0 of the first pulse train.

[0013] Optionally, the modulation method of the ultrasonic output pulse further includes the following steps:

[0014] Adjust the duty cycle and / or voltage amplitude of each pulse train to control the output power of the pulse train.

[0015] Optionally, controlling the duty cycle of the pulse train further includes the following steps:

[0016] Adjust the pulse width and / or time interval of the pulse train to control the duty cycle of the pulse train.

[0017] Optionally, step S30 further includes the following steps:

[0018] The treatment head is controlled to reciprocate parallel to the skin surface, and the transducer is controlled to output N second pulse trains in sequence.

[0019] The present invention proposes a controller, which includes a memory and a processor. The memory stores a control program for an ultrasonic output pulse. When the control program for the ultrasonic output pulse is executed by the processor, it implements the steps of the ultrasonic output pulse modulation method as described above.

[0020] This invention proposes an ultrasound therapy device, comprising:

[0021] An ultrasound therapy probe with an internal transducer;

[0022] An ultrasonic generating unit is used to modulate the ultrasonic output pulse of the transducer;

[0023] The controller described above is connected to the ultrasound generating unit and is used to control the operation of the ultrasound generating unit to modulate the therapeutic pulses output by the transducer;

[0024] The controller is also used to control the ultrasound therapy probe to reciprocate along a direction parallel to the skin surface, and to control the transducer to output treatment pulses.

[0025] Optionally, the ultrasound therapy device further includes an ultrasound handpiece unit, on which the ultrasound therapy probe is mounted. The ultrasound handpiece unit includes a point handle and a line handle. The point handle is used to control the ultrasound therapy probe to slide on the skin surface to control the output of treatment pulses, and the line handle is used to drive the movement of the transducer in the ultrasound therapy probe to control the output of treatment pulses.

[0026] The ultrasonic output pulse modulation method of the present invention includes the following steps: Step S10, obtaining the output frequency f2 of a first preset pulse, and modulating the pulse to be modulated according to the output frequency f2 of the first preset pulse to obtain a first pulse train; Step S20, obtaining the period length t0 of a second preset pulse, and dividing the first pulse train into N second pulse trains according to the period length t0 of the second preset pulse; Step S30, controlling the transducer to output N second pulse trains sequentially. During operation, the pulse to be modulated is obtained, and the obtained pulse to be modulated is divided into N pulse trains according to the output frequency f2 of the preset pulse and the period length t0 of the preset pulse train, and N pulse trains are output sequentially according to the N periods. Compared with the output of a single pulse, the energy output of multiple pulse trains is not an instantaneous burst, so the temperature in the central area of ​​the heat diffusion zone will not be too high, and the diffusion range to the surrounding area will be relatively large. After pulse modulation, pain can be effectively reduced and comfort improved. At the same time, the larger heat diffusion zone makes the energy in the entire treatment area more uniform, improving the treatment effect. The present invention reduces pain and improves the treatment effect by improving the energy uniformity of the treatment area. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a flowchart illustrating an embodiment of the ultrasonic output pulse modulation method of the present invention.

[0029] Figure 2 for Figure 1 A flowchart of an embodiment of step S20;

[0030] Figure 3 This is a schematic diagram of the waveform of the modulation pulse in an embodiment of the modulation method for ultrasonic output pulses of the present invention.

[0031] Figure 4A comparison diagram showing the thermal diffusion zone formed by a single treatment pulse versus the thermal diffusion zone formed by multiple pulse trains;

[0032] Figure 5 This is a waveform diagram illustrating the adjustment of pulse train power according to the present invention. Detailed Implementation

[0033] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Reference Figure 1 and Figure 3 In one embodiment of the present invention, the modulation method of the ultrasonic output pulse includes the following steps:

[0036] Step S10: Obtain the output frequency f2 of the first preset pulse, and modulate the pulse to be modulated according to the output frequency f2 of the first preset pulse to obtain the first pulse train;

[0037] Step S20: Obtain the period length t0 of the second preset pulse, and divide the first pulse train into N second pulse trains according to the period length t0 of the second preset pulse;

[0038] Step S30: Control the transducer to output N second pulse trains in sequence.

[0039] Ultrasonic therapy devices achieve therapeutic effects by delivering therapeutic pulses to subcutaneous tissue. These pulses create a thermal diffusion zone within the target tissue, allowing the focused therapeutic pulse to act on the subcutaneous tissue. The treatment range of the ultrasonic therapy device is expanded by diffusing the area affected by the focused therapeutic pulse. However, each ultrasonic pulse creates a thermal diffusion zone within the target tissue, and most of the delivered therapeutic pulse is concentrated in the central region of this thermal diffusion zone, resulting in a narrow energy diffusion range and affecting the overall therapeutic effect across the entire treatment area.

[0040] Reference Figure 4 If each ultrasound pulse is output as a single treatment pulse, the output pulse instantly hits the tissue at the focal point, causing the tissue to heat up rapidly, with the center temperature reaching 90°C instantly. Simultaneously, the heat diffuses outwards, forming a thermal diffusion zone. Due to the concentrated energy, this thermal diffusion zone is narrow, with a diameter not exceeding 1mm. The instantaneous high temperature generated at the focal point can cause a stinging sensation for the user. Furthermore, because the thermal diffusion zone is very narrow and the energy distribution is uneven, the therapeutic effect of ultrasound therapy is poor.

[0041] In this embodiment, a pulse to be modulated is modulated into multiple pulse trains for output, that is, a single treatment pulse (one treatment pulse) is modulated into a pulse train for output. The total energy of the pulse train is the same as the energy of a single treatment pulse. In other words, multiple small pulses hit the tissue at the focal point in sequence, and the tissue at the focal point heats up under the superposition of energy, while the heat also diffuses to the surroundings.

[0042] The specific working process of the modulation pulse is as follows: first, the ultrasonic working frequency of the pulse generated by the ultrasonic source is modulated to obtain the first modulated pulse train, which is denoted as the first pulse train. Then, the first pulse train is divided into N second pulse trains.

[0043] The process of executing step S10 involves frequency modulation of the pulses generated by the ultrasound source. Assuming the operating frequency of the pulses generated by the ultrasound source is f1, and the output frequency of the modulated pulse train is f2, generally, the frequency f1 of the pulses generated by the ultrasound source is too high to be directly used as therapeutic pulse output. The required operating frequency f2 for therapeutic pulses is much smaller than the value of f1 (f1 is generally taken as 500K-15MHz, and f2 is generally taken as 2-50Hz). Figure 3Taking this as an example, the specific working process of modulation can be explained. The modulation process can be compared to the pulses generated by the ultrasound source flowing through a "switch". For a portion of the pulses generated by the original ultrasound source, the "switch" is turned on, and the pulses are still output in the form of the fundamental frequency. For another portion of the pulses generated by the original ultrasound source, the "switch" is turned off, and the pulse output stops. It can be understood that the pulse to be modulated is always output in the form of the fundamental frequency, while the first pulse train after modulation is output in the form of the fundamental frequency for a period of time, and no pulses are output for another period of time. Therefore, the frequency of the first pulse train is less than that of the pulse to be modulated.

[0044] In step S20, the first pulse train is divided into N second pulse trains. Assume the period of the first pulse train output is T0, meaning the first pulse train outputs in the form of a fundamental frequency within a time length of T0. Then, each pulse of time length T0 is modulated to output at time t0. Assume there are a total of N modulated pulses, and the period of each second pulse train is t0, where T0 = N * t0. It should be noted that the period of each pulse train includes the pulse width and the pulse interval. The pulse interval is the time during which no pulse train is output, and the pulse width is the time during which pulse train output occurs. Within the pulse width of the pulse train, the output is still in the form of a fundamental frequency, not in the form of a high potential.

[0045] Because there are time intervals between the multiple pulse trains formed after modulation, the output energy is not an instantaneous burst. Therefore, the temperature in the central area of ​​the resulting heat diffusion zone will not be too high, and the range of diffusion to the surrounding areas will be relatively large. When using focused therapeutic pulses to act on subcutaneous tissue, a temperature of 50-60℃ can achieve good therapeutic effects. Excessive temperature increases the risk of burns or causes unnecessary damage that is not conducive to recovery. At the same time, excessively high instantaneous temperature can cause a strong stinging sensation. After pulse modulation, pain can be effectively reduced, comfort can be improved, and the resulting larger heat diffusion zone makes the energy more uniform throughout the treatment area, thus improving the therapeutic effect.

[0046] The ultrasonic output pulse modulation method of the present invention includes the following steps: Step S10, obtaining the output frequency f2 of a first preset pulse, and modulating the pulse to be modulated according to the output frequency f2 of the first preset pulse to obtain a first pulse train; Step S20, obtaining the period length t0 of a second preset pulse, and dividing the first pulse train into N second pulse trains according to the period length t0 of the second preset pulse; Step S30, controlling the transducer to output N second pulse trains sequentially. Compared with the output of a single pulse, the energy output of multiple pulse trains is not an instantaneous burst, so the temperature in the central area of ​​the heat diffusion zone will not be too high, and the diffusion range to the surrounding area will be relatively large. After pulse modulation, pain can be effectively reduced and comfort improved. At the same time, the larger heat diffusion zone makes the energy in the entire treatment area more uniform, thus improving the treatment effect. The present invention reduces pain and improves the treatment effect by improving the energy uniformity of the treatment area.

[0047] Reference Figure 2 In one embodiment of the present invention, step S20 further includes the following steps:

[0048] Step S21: Obtain the pulse width of the period of the second preset pulse and the interval time of the period of the second preset pulse.

[0049] Step S22: Determine the period length t0 of the second preset pulse based on the pulse width of the period of the second preset pulse and the interval time of the period of the second preset pulse. In this embodiment, the length of the period of a second preset pulse includes the pulse width and the interval time. The pulse width is the duration of pulse output in the period, and the interval time is the duration of no pulse output in the period. It should be noted that the pulse interval of the pulse train is the time when there is no pulse train output, and the pulse width of the pulse train is the time when there is pulse train output. Within the pulse width of the pulse train, the output is still in the form of the fundamental frequency, rather than in the form of a high potential.

[0050] Reference Figure 3 In one embodiment of the present invention, the pulse width of the period of the second preset pulse is less than the human pain nerve response time constant.

[0051] In this embodiment, the human neural reaction time is the time from receiving a stimulus to the occurrence of a reaction. The human body can only perceive a stimulus after the neural reflex arc is completed. The human pain nerve reaction time constant t0 ∈ [t0 ≤ t0 ≤ 5 ms, 2 ms], and the period of each of the N pulse trains is less than the human neural reaction time constant t0. The specific value of t0 is related to the location of the nerve in the human body. The pain nerve reaction time constant t0 varies in different parts of the body; therefore, the pulse width of the period can be set according to the treatment area. For example, if the human neural reaction time constant t0 corresponding to a certain treatment area is 1 ms, the pulse width of the period can be set to be less than 1 ms.

[0052] The duration of a single pulse train is shorter than the human nerve reaction time constant. It applies energy before the completion of the nerve reflex arc and completes the output of the therapeutic pulse before the neuron receives the stimulation signal, which can effectively reduce skin irritation during treatment.

[0053] Reference Figure 3 In one embodiment of the present invention, the sum of the pulse widths of the periods t0 of the N second preset pulses is the same as the sum of the pulse widths of the periods T0 of the first pulse train.

[0054] In this embodiment, during the process of dividing the period T0 of the first pulse train into N second pulse trains, the time interval of the pulses to be modulated is modulated first. The pulse width of the output pulse train is not changed; that is, the pulse energy output by the first pulse train within the time length T0 is the same as the sum of the pulse energy output by the N second pulse trains within the time length t0. The pulse widths of both the first and second pulse trains still output energy in the form of the fundamental frequency.

[0055] Reference Figure 3 The time interval for each preset second pulse train is typically set to 0.1ms-10ms. It's important to note that the preset time interval for the second pulse train refers to the time interval between two adjacent pulse widths in the output waveform of the second pulse train. One period t0 of the second pulse train includes one pulse width and one time interval. During the pulse width of period t0, the second pulse train outputs energy in the form of the fundamental frequency; during the time interval of period t0, no energy is output.

[0056] ,reference Figure 4 In one embodiment of the present invention, step S30 further includes the following steps:

[0057] The treatment head is controlled to reciprocate parallel to the skin surface, and the transducer is controlled to output N pulse trains sequentially according to N cycles.

[0058] In this embodiment, the handle is equipped with a drive unit for driving the treatment head to vibrate in a direction parallel to the treatment surface to output multiple modulated pulse trains, which have a better therapeutic effect.

[0059] When the transducer is stationary, the therapeutic pulses output by the transducer create a smaller thermal diffusion zone with a higher temperature in the center. When the transducer is moving, the therapeutic pulses output by the transducer create a relatively larger thermal diffusion zone, and the temperature in the center of this thermal diffusion zone is lower than the temperature in the center of the thermal diffusion zone when the transducer is stationary, which can effectively reduce pain.

[0060] During operation, the treatment end (ultrasound window) of the treatment head is in close contact with the skin surface. When the controller modulates the output pulses, it controls the treatment head to vibrate back and forth along the skin surface in a direction parallel to the skin, simultaneously outputting a series of treatment pulses. The position of the output pulse series is constantly changing, creating a relatively small heat diffusion zone with a higher temperature at its center. The temperature at the center of this heat diffusion zone is lower than the center temperature of the heat diffusion zone formed in a static state, effectively reducing pain. Furthermore, because the heat diffusion zone is larger, the resulting treatment area is also larger, providing a massage effect to the skin in the treatment area, effectively alleviating pain, and promoting blood circulation in the treated tissue, which aids in tissue recovery.

[0061] The treatment pulses employ a point-based pulse output method, with each pulse targeting a single point, sequentially creating an energy focal point within the tissue. Due to time intervals between the multiple pulse trains formed after modulation, the output energy is not an instantaneous burst. Therefore, the temperature in the central area of ​​the resulting heat diffusion zone is not too high, while the surrounding area diffuses relatively widely. Using focused treatment pulses on subcutaneous tissue, a temperature of 50-60℃ achieves good therapeutic effects. Excessive temperature increases the risk of burns or causes unnecessary damage, hindering recovery. Furthermore, instantaneous high temperatures result in a strong stinging sensation. Pulse modulation effectively reduces pain and improves comfort. The larger heat diffusion zone ensures more uniform energy distribution throughout the treatment area, enhancing the therapeutic effect.

[0062] By controlling the sliding of the treatment handle, the transducer's output position changes. During this sliding motion, the transducer's output energy diffuses along with the handle, ultimately forming a spherical heat diffusion zone. Simultaneously, the treatment head vibrates back and forth across the skin surface, causing a slight shift in the transducer's pulse output relative to the pulse emitted during the sliding motion of the handle. This transforms the original spherical heat diffusion zone into an irregular ellipsoid, further increasing its size and improving treatment effectiveness. The combination of the treatment head's vibration and the handle's sliding motion prevents adjacent pulses from hitting the same area of ​​tissue, reducing the risk of burns.

[0063] Figure 4 The vibration of the treatment head combined with the sliding treatment of the handle transforms the treatment area from a circular area into an irregular elliptical area, resulting in a larger heat diffusion zone, more uniform energy distribution, and better treatment effects.

[0064] Reference Figure 5 In one embodiment of the present invention, controlling the duty cycle of the pulse train further includes the following steps:

[0065] Adjust the duty cycle and / or voltage amplitude of each pulse train to control the output frequency of the pulse train.

[0066] In this embodiment, the ultrasonic output frequency of the transducer is achieved by modulating its modulated pulse, specifically by controlling the timing and amplitude of the modulated pulse. The higher the duty cycle of the modulated pulse, the higher its output frequency; conversely, the higher its amplitude, the higher its output frequency.

[0067] Reference Figure 5 In one embodiment of the present invention, controlling the duty cycle of the pulse train further includes the following steps:

[0068] Adjust the pulse width and / or time interval of the pulse train to control the duty cycle of the pulse train.

[0069] In this embodiment, the output duty cycle of the pulse train is controlled by controlling the pulse width and / or the time interval. The larger the modulated pulse width, the larger the output duty cycle; the larger the modulated pulse time interval, the smaller the output duty cycle.

[0070] In one embodiment of the present invention, the following steps are included before controlling the transducer to output pulses:

[0071] Check whether the surface of the ultrasound therapy probe is in sufficient contact with the skin;

[0072] When sufficient contact between the surface of the ultrasound therapy probe and the skin is detected, the transducer outputs a pulse; when insufficient contact between the surface of the ultrasound therapy probe and the skin is detected, a corresponding alarm signal is output.

[0073] In this embodiment, before controlling the output of the treatment pulse based on the detected speed, it is first checked whether the surface of the ultrasonic treatment probe is in sufficient contact with the skin. If it is not in contact, the speed feedback step is not performed. Since the treatment pulse output by the ultrasonic treatment transducer may cause skin burns if the surface of the ultrasonic treatment probe is not in sufficient contact with the skin, the speed feedback step is not performed, and a corresponding alarm signal is output to alert the operator.

[0074] In one embodiment of the present invention, the modulation method of the ultrasonic output pulse further includes the following steps:

[0075] Detecting the temperature of the skin surface;

[0076] When the detected temperature is higher than the preset temperature value, the transducer is controlled to stop outputting treatment pulses and output a corresponding alarm signal. When the detected temperature is lower than the preset temperature value, an operation guidance signal is output and the transducer is controlled to continue outputting treatment pulses.

[0077] In this embodiment, during the process of the ultrasound transducer outputting treatment pulses to the subcutaneous tissue, the temperature of the skin surface will also increase. When the detected temperature value is lower than the preset temperature value, it is determined that the temperature of the skin surface is still in the safe temperature range, and a guidance signal is output to prompt the operator to continue the ultrasound treatment operation on the area.

[0078] If the detected temperature exceeds the preset temperature, the skin surface temperature is deemed too high, and the ultrasound transducer stops outputting treatment pulses to the subcutaneous tissue to avoid skin burns. A corresponding alarm signal is also output to alert the operator.

[0079] This invention proposes a controller.

[0080] In one embodiment of the present invention, the controller includes a memory and a processor. The memory stores a control program for an ultrasonic output pulse. When the control program for the ultrasonic output pulse is executed by the processor, it implements the steps of the ultrasonic output pulse modulation method as described above.

[0081] The controller performs the steps of the ultrasonic output pulse control method as described above. The specific working steps of the ultrasonic output pulse control method are as described in the above embodiments. Since the controller of the present invention adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0082] This invention proposes an ultrasonic therapy device.

[0083] The ultrasound therapy device includes a controller as described above. The specific structure of the controller is as described in the above embodiments. Since the ultrasound therapy device of the present invention adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0084] In one embodiment of the present invention, the ultrasound therapy device includes:

[0085] An ultrasound therapy probe with an internal transducer;

[0086] An ultrasonic generating unit is used to modulate the ultrasonic output pulse of the transducer;

[0087] The controller described above is connected to the ultrasound generating unit and is used to control the operation of the ultrasound generating unit to modulate the therapeutic pulses output by the transducer;

[0088] The controller is also used to control the ultrasound therapy probe to reciprocate along a direction parallel to the skin surface, and to control the transducer to output treatment pulses.

[0089] During treatment, the operator moves the treatment handpiece to keep the ultrasound window in close contact with the skin, and the treatment pulses are output in a pulsed manner. The position of the treatment pulse output is controlled by continuously moving the treatment handpiece to achieve the therapeutic effect. The ultrasound treatment transducer on the ultrasound treatment probe outputs focused treatment pulses, which manifest as a thermal effect on the tissue. The heat diffuses from the focal point to the surrounding area, forming a thermal zone / thermal diffusion zone.

[0090] The treatment head is equipped with a vibration motor, and the controller contains a drive control circuit to operate the vibration motor. While the controller controls the transducer to output treatment pulses, the drive control circuit also drives the vibration motor, causing the ultrasound treatment probe to vibrate reciprocally along a direction parallel to the skin surface. This causes a slight shift in the position of the treatment pulses, further expanding the effective range of the heat diffusion zone. The vibration motor is equipped with a corresponding sensor, such as a temperature sensor. The controller can control the operating frequency of the vibration motor based on the temperature detected by the temperature sensor, thereby controlling the vibration power of the ultrasound treatment probe and facilitating the diffusion of the heat diffusion zone.

[0091] The vibration motor has a set of adjustable eccentric blocks installed at both ends of the rotor shaft. The centrifugal force generated by the high-speed rotation of the shaft and eccentric blocks is used to generate the excitation force, thereby driving the ultrasonic therapy probe to vibrate. Since the vibration power of the ultrasonic therapy probe is relatively small, a low-power model of vibration motor is used.

[0092] In one embodiment of the present invention, the sensor assembly is further used to detect the temperature of the skin surface and whether the skin surface is in sufficient contact with the surface of the ultrasound therapy probe. The alarm is further used to sound an alarm when the sensor assembly detects that the temperature of the skin surface is greater than a preset temperature value, or when the sensor assembly detects that the skin surface is in sufficient contact with the surface of the ultrasound therapy probe.

[0093] In this embodiment, the sensor assembly also includes a contact sensor, which detects whether the treatment probe is in full contact with the skin. If it is not in contact, the controller does not perform the speed feedback operation step, and the alarm sounds.

[0094] The sensor assembly also includes a temperature sensor, which stops outputting treatment pulses and alerts the operator by sounding an alarm when it detects that the temperature of the skin surface is higher than a preset temperature value.

[0095] During treatment, the operator moves the treatment handpiece to keep the ultrasound window in close contact with the skin, and the treatment pulses are output in a pulsed manner. The position of the treatment pulse output is controlled by continuously moving the treatment handpiece to achieve the therapeutic effect. The ultrasound treatment transducer on the ultrasound treatment probe outputs focused treatment pulses, which manifest as a thermal effect on the tissue. The heat diffuses from the focal point to the surrounding area, forming a thermal zone / thermal diffusion zone.

[0096] When the treatment handpiece is stationary, the heat diffusion area formed by the treatment pulse is small, and the temperature in the center is high. When the treatment handpiece is moving, the heat diffusion area formed by the treatment pulse is relatively large, and the temperature in the center of this heat diffusion area is lower than the temperature in the center of the heat diffusion area formed when the handpiece is stationary. This can effectively reduce pain. Therefore, the energy distribution of the heat diffusion area formed when the handpiece is moving is more uniform, and the experience is more comfortable.

[0097] In one embodiment of the present invention, the specific range of the working parameters of the ultrasonic handpiece unit is as follows: output power of 1-30W, output frequency of 500K-15MHz, and depth of action on subcutaneous tissue of 0t5-25mm.

[0098] In one embodiment of the present invention, the specific range of the operating parameters of the treatment handpiece is: a repetition frequency of 2Hz-50Hz. The output frequency of the ultrasonic handpiece unit is 500K-15MHz, which is the fundamental frequency f1. The repetition frequency of the treatment handpiece output is the frequency f2 of the first preset pulse. The pulse frequency output by the ultrasonic source is f1, which is obtained by frequency modulation. The output frequency f2 of the treatment handpiece is when it is working.

[0099] In one embodiment, the treatment handle is moved by the operator during treatment, moving in a spiral trajectory centered on different locations within the treatment area.

[0100] In this embodiment, before treatment, the treatment handle is pressed against the skin using a modulation method of ultrasonic output pulses to ensure full contact with the skin. During treatment, the treatment probe is continuously slid by controlling the movement of the treatment handle. The force is uniform during sliding, and the treatment operation is carried out in a spiral-circular trajectory around the same point to achieve the treatment effect in a small area.

[0101] During treatment, circles can be drawn around different points within the treatment area, each with a different center, and these circles intersect each other. This achieves a relatively uniform energy distribution across the entire treatment surface. The treatment handle is then moved to achieve the therapeutic goal. The energy output is relatively uniform, and the temperature superposition effect is good, resulting in a more effective treatment.

[0102] During treatment, the treatment handle can be controlled to slide back and forth in a zigzag pattern within the treatment area. The force should be uniform during the slide, and the treatment pulses should be continuously spread through the back and forth sliding, eventually spreading the treatment energy to all treatment areas to achieve the desired therapeutic effect.

[0103] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method of modulation of an ultrasonic output pulse, characterized by, The method comprises the following steps: Step S10, obtaining an output frequency f2 of a first preset pulse, and modulating a to-be-modulated pulse according to the output frequency f2 of the first preset pulse to obtain a first pulse train; Step S20, obtaining a period length t0 of a second preset pulse, and dividing the first pulse train into N second pulse trains according to the period length t0 of the second preset pulse; Step S30, controlling the transducer to output the N second pulse trains in sequence; The step S20 further comprises the following steps: Step S21, obtaining a pulse width of a period of the second preset pulse and an interval time of the period of the second preset pulse; Step S22, determining the period length t0 of the second preset pulse according to the pulse width of the period of the second preset pulse and the interval time of the period of the second preset pulse; The sum of pulse widths of the N second preset pulses is the same as the sum of pulse widths within a period T0 of the first pulse train.

2. The method of claim 1, wherein, The pulse width of the period of the second preset pulse is less than a pain nerve response time constant of a human body.

3. The method of claim 1, wherein, The method for modulating the ultrasonic output pulse further comprises the following steps: Adjusting a duty cycle and / or a voltage amplitude of each of the second pulse trains to control an output power of the second pulse train.

4. The method of claim 3, wherein the ultrasound output pulse is modulated by, The adjusting of the duty cycle of each of the second pulse trains further comprises the following steps: Adjusting a pulse width and / or a time interval of each of the second pulse trains to adjust the duty cycle of the second pulse train.

5. The method of claim 1, wherein, The step S30 further comprises the following steps: Controlling the treatment head to reciprocate along a direction parallel to a skin surface, and controlling the transducer to output the N second pulse trains in sequence.

6. A controller, comprising a memory and a processor, wherein a control program for an ultrasonic output pulse is stored on the memory, and the control program for the ultrasonic output pulse is executed by the processor to implement the steps of the method for modulating the ultrasonic output pulse according to any one of claims 1 to 5.

7. An ultrasonic therapy apparatus, characterized by comprise: an ultrasonic treatment probe, internally provided with a transducer; an ultrasonic generating unit, configured to modulate an ultrasonic output pulse of the transducer; a controller according to claim 6, connected to the ultrasonic generating unit, configured to control the ultrasonic generating unit to work to modulate a treatment pulse output by the transducer; The controller is further configured to control the ultrasonic treatment probe to reciprocate along a direction parallel to a skin surface, and control the transducer to output the treatment pulse.

8. The ultrasonic therapy apparatus of claim 7, wherein, The ultrasonic treatment instrument further comprises an ultrasonic handle unit, the ultrasonic treatment probe is mounted on the ultrasonic handle unit, the ultrasonic handle unit comprises a point type handle and a line type handle, the point type handle is configured to control the ultrasonic treatment probe to slide on the skin surface to control the output of the treatment pulse, and the line type handle is configured to drive the movement of the transducer in the ultrasonic treatment probe to control the output of the treatment pulse.

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