Surgical generator and ultrasonic surgical system

Abstract

The utility model discloses a surgical generator and an ultrasonic surgical system. The surgical generator comprises a driving module, a front-end sampling module, a rear-end sampling module and a control module. The control module comprises an analog-to-digital converter and a processor, the analog-to-digital converter is connected with the current sampling circuit, the voltage sampling circuit and the temperature sampling circuit of the front-end sampling module and the rear-end sampling module, and the processor carries out real-time parameter identification on the collected current value, the collected voltage value and the collected temperature value after being converted by the analog-to-digital converter. And the topological efficiency value of the surgical generator is calculated in real time, and the processor adjusts the surgical generator according to the topological efficiency value so as to ensure the working effect of the surgical instrument connected with the ultrasonic transducer. In the process of using the ultrasonic surgical system comprising the generator, the generator obtains an accurate topological efficiency value, and related parts of the ultrasonic generator are directly adjusted according to the topological efficiency value, so that the power utilization rate of the ultrasonic generator is improved, and the output efficiency of the ultrasonic surgical system is improved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of ultrasonic surgery, and in particular to a surgical generator and an ultrasonic surgical system. Background Art

[0002] Ultrasonic cutting hemostasis system is a medical device widely used in surgical operations. It can accurately cut and coagulate diseased tissue to stop bleeding based on the specific instrument configuration and ultrasonic energy, thereby minimizing patient trauma and promoting rapid recovery after surgery. The ultrasonic cutting hemostasis system consists of an ultrasonic generator, a transducer, a blade and a blade, wherein the ultrasonic generator generates the current drive signal or voltage drive signal required by the target drive unit (for example, the blade and the blade), which is input to the transducer. The transducer converts the current drive signal or voltage drive signal into a mechanical signal, and the target drive unit cuts and stops bleeding on the target biological tissue under the drive of the mechanical signal. However, the problem of applying the ultrasonic cutting hemostasis system to medical devices is still the high-efficiency cutting and coagulation of blood vessels, and the key indicator related to the cutting and coagulation effect is the output efficiency of the ultrasonic generator. Therefore, it is necessary to measure the output efficiency of the ultrasonic generator to determine the cutting and coagulation effect of the ultrasonic cutting hemostasis system.

[0003] In the prior art, the output efficiency of an ultrasonic generator can be measured using an electric power meter or an oscilloscope. For example, when using an electric power meter to measure the output efficiency of an ultrasonic generator, the ultrasonic generator can be set to maximum output power, and then a phase-corrected electric power meter is used for measurement. A current test line is connected in series to the input of the transducer to measure the current value output by the ultrasonic generator, and a voltage test line is connected in parallel to the input of the transducer to measure the voltage value output by the ultrasonic generator. When using an oscilloscope to measure the output efficiency of an ultrasonic generator, the ultrasonic generator can be set to maximum output power, and then a calibrated voltage probe and current probe are connected to the input port of the oscilloscope. The current probe is clamped to the wire at one end of the transducer to measure the current value output by the ultrasonic generator, and the voltage probe is clamped to the wires at both ends of the transducer to measure the voltage value output by the ultrasonic generator. The output power of the ultrasonic generator is then determined based on the current and voltage values ​​output by the ultrasonic generator, and the output efficiency of the ultrasonic generator is calculated based on the maximum output power of the ultrasonic generator. During the above-mentioned measurement process, both the oscilloscope and the electric power meter are external devices, which are not available during normal use of the ultrasonic cutting and hemostasis system. Furthermore, the oscilloscope and the electric power meter are signal measurement devices and cannot be used to calculate the measurement results, making it impossible to directly determine the output efficiency of the ultrasonic generator based on the measurement results. The measurement results measured using the above-mentioned method are the output voltage and output current values ​​of the ultrasonic generator at its maximum output power. When calculating the output efficiency of the ultrasonic generator during normal operation, the real-time input current and input voltage values ​​of the ultrasonic generator are missing, which means that the output efficiency of the ultrasonic generator cannot be accurately calculated. Utility Model Content

[0004] The utility model provides a surgical generator and an ultrasonic surgical system for providing a driving signal to an ultrasonic transducer connected thereto, wherein the generator comprises:

[0005] A driving module, comprising a push-pull circuit and a DC voltage conversion circuit for providing a specific DC voltage therefor, wherein the push-pull circuit comprises an upper half-bridge driving circuit and a lower half-bridge driving circuit for providing the driving signal;

[0006] A front-end sampling module, comprising a current sampling device, a voltage sampling device, and a temperature sampling device for sampling the upper arm power device and the lower arm power device of the push-pull circuit, and corresponding current sampling circuits, voltage sampling circuits, and temperature sampling circuits;

[0007] A back-end sampling module, comprising a current sampling device and a voltage sampling device for sampling the transducer and corresponding current sampling circuits and voltage sampling circuits;

[0008] A control module includes an analog-to-digital converter and a processor communicatively connected to the analog-to-digital converter, wherein the analog-to-digital converter is connected to the current sampling circuit, voltage sampling circuit, and temperature sampling circuit of the front-end sampling module, and the analog-to-digital converter is also connected to the current sampling circuit and voltage sampling circuit of the back-end sampling module. The processor performs real-time parameter identification on the collected current values, voltage values, and temperature values ​​after conversion by the analog-to-digital converter, and calculates the topological efficiency value of the surgical generator in real time. The processor adjusts the surgical generator according to the topological efficiency value to ensure the working effect of the surgical instrument connected to the ultrasonic transducer.

[0009] Optionally, the driving module further includes the following power devices: a transformer, and the front-end sampling module further includes a current sampling device, a voltage sampling device and a temperature sampling device for sampling the transformer and corresponding current sampling circuits, voltage sampling circuits and temperature sampling circuits.

[0010] Optionally, the surgical generator includes a heat dissipation device. When the topological efficiency value calculated in real time by the processor is low and the collected temperature value is high, the control module increases the heat dissipation rate of the heat dissipation device and adjusts the driving signal provided to the ultrasonic transducer.

[0011] Optionally, the surgical generator includes a display module or a reminder module. When the topological efficiency value calculated in real time by the processor is low and the collected temperature value is high, and when the topological efficiency of the generator cannot be adjusted after the control module increases the heat dissipation rate of the heat dissipation device, the display module displays a power device failure or the reminder module prompts a power device failure.

[0012] Optionally, the current sampling device is selected from: a sampling resistor, a sampling chip, a Hall sensor or a current transformer.

[0013] Optionally, the processor includes any one of the following chips: a microcontroller unit, a programmable logic array, a digital signal processing technology, a direct digital frequency synthesis chip, and an analog-to-digital conversion chip.

[0014] Optionally, the surgical generator includes a display module for displaying the identified current value, voltage value, temperature value and topological efficiency value.

[0015] Optionally, the temperature sampling device is selected from: a thermistor, an IC temperature sensor, a resistance temperature detector, an infrared temperature sensor or a thermocouple.

[0016] Optionally, the surgical generator further includes a communication module for remotely transmitting the current value, voltage value, temperature value and calculated topological efficiency value identified by the processor to a server.

[0017] In a second aspect, the present invention further provides an ultrasonic surgical system, comprising the surgical generator described in the first aspect.

[0018] The technical solution of the embodiment of the present invention is to provide a front-end sampling module to collect the current and voltage of the upper-arm power device and the lower-arm power device, and a back-end sampling module to collect the current and voltage on the ultrasonic transducer side. Then, the control module calculates the input power based on the front-end current and voltage, and calculates the output power based on the back-end current and voltage. Thus, the topological efficiency value of the surgical generator can be determined based on the output power and input power. This avoids the need for an external device to measure the efficiency of the surgical generator. Moreover, the input power of the surgical generator can be measured in real time during use, and the efficiency of the surgical generator can be measured in real time based on the input power and output power of the surgical generator, thereby improving the measurement accuracy of the surgical generator efficiency. In addition, the topological efficiency of the surgical generator can be adjusted based on the topological efficiency value and temperature, thereby improving the power utilization of the ultrasonic generator, improving the working performance of the surgical instrument connected to the ultrasonic transducer, and improving the output efficiency of the ultrasonic surgical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a surgical generator provided by an embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of the circuit principle structure of a surgical generator provided by the utility model;

[0021] Figure 3 A schematic diagram of the efficiency of a surgical generator provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of fan speed adjustment provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the principle of a current sampling circuit provided by the utility model;

[0024] Figure 6 This is a schematic diagram of the principle of a temperature sampling circuit provided by the utility model;

[0025] Figure 7 This is a schematic diagram of the principle of a voltage sampling circuit provided by the utility model. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0027] Figure 1 This is a schematic structural diagram of a surgical generator provided by an embodiment of the present utility model. Figure 2 This is a schematic diagram of the circuit principle structure of a surgical generator provided by the utility model. Figure 1 and Figure 2 As shown, the surgical generator includes:

[0028] The driving module 10 includes a push-pull circuit 210 and a DC voltage conversion circuit 220 for providing a specific DC voltage thereto. The push-pull circuit 210 includes an upper half-bridge driving circuit 211 and a lower half-bridge driving circuit 212 for providing a driving signal.

[0029] The front-end sampling module 20 includes a current sampling device 201, a voltage sampling device 202, and a temperature sampling device 203 for sampling the upper arm power device and the lower arm power device of the push-pull circuit 210, and corresponding current sampling circuits 204, voltage sampling circuits 205, and temperature sampling circuits 206;

[0030] The back-end sampling module 30 includes a current sampling device 301 and a voltage sampling device 302 for sampling the ultrasonic transducer, and corresponding current sampling circuits 303 and voltage sampling circuits 304;

[0031] The control module 40 includes an analog-to-digital converter 401 and a processor 402 communicatively connected to the analog-to-digital converter 401. The analog-to-digital converter 401 is connected to the current sampling circuit 204, the voltage sampling circuit 205, and the temperature sampling circuit 206 of the front-end sampling module 20, and the analog-to-digital converter 401 is also connected to the current sampling circuit 303 and the voltage sampling circuit 304 of the back-end sampling module 30. The processor 402 performs real-time parameter identification on the collected current values, voltage values, and temperature values ​​after conversion by the analog-to-digital converter 401, and calculates the topological efficiency value of the surgical generator in real time. The processor 402 adjusts the surgical generator according to the topological efficiency value to ensure the working effect of the surgical instrument connected to the ultrasonic transducer.

[0032] Specifically, the DC voltage conversion circuit 220 can output a specific DC voltage to provide a power supply voltage for the push-pull circuit 210. Exemplarily, the DC voltage conversion circuit 220 can be implemented using a Buck circuit. The specific DC voltage value can be configured by the resistance value of the chip's peripheral resistors. In some embodiments, the DC voltage conversion circuit 11 can also be implemented using a step-down chip. The push-pull circuit 210 can amplify the input power supply voltage to form a drive signal and output it to the ultrasonic transducer, so that the voltage output by the push-pull circuit can drive the ultrasonic transducer to operate. At this time, the ultrasonic transducer converts the electrical signal into a vibration signal, driving the surgical instrument connected to it to operate. Exemplarily, the surgical instrument may include a cutter. After the ultrasonic transducer converts the electrical signal into a vibration signal, it can drive the cutter to cut, achieving cutting and hemostasis during surgical operations. Specifically, the control signal provided by the control module 40 to the push-pull circuit 210 can be a sinusoidal signal. When the control module 40 outputs the upper half-cycle signal of the control signal, the control signal can control the upper half-bridge drive circuit 211 to be turned on, and the power supply voltage provided by the DC voltage conversion circuit 220 is amplified by the upper half-bridge drive circuit 211, and then output to the ultrasonic transducer to drive the ultrasonic transducer to operate. When the control module 40 outputs the lower half-cycle signal of the control signal, the control signal can control the lower half-bridge drive circuit 212 to be turned on, and the power supply voltage provided by the DC voltage conversion circuit 220 is amplified by the lower half-bridge drive circuit 212, and then output to the ultrasonic transducer to drive the ultrasonic transducer to operate. In some embodiments, the upper half-bridge drive circuit 211 may include an upper bridge arm power device, and the lower half-bridge drive circuit 212 may include a lower bridge arm power device, and the upper bridge arm power device and the lower bridge arm power device are different types of power devices.

[0033] The current sampling device 201 in the front-end sampling module 20 can collect the currents of the upper-arm power devices and the lower-arm power devices, and output them to the control module 40 via the current sampling circuit 204. The voltage sampling device 202 can collect the voltages of the upper-arm power device Q1 and the lower-arm power device Q2, and output them to the control module 40 via the voltage sampling circuit 205. The analog-to-digital converter 401 of the control module 40 can convert the front-end analog current signal provided by the current sampling circuit 204 and the front-end analog voltage signal provided by the voltage sampling circuit 205 into a front-end digital current signal and a front-end digital voltage signal, respectively, and output them to the processor 402. The processor 402 can perform real-time parameter recognition on the front-end digital current signal and the front-end digital voltage signal, and calculate the front-end power signal based on the front-end digital current signal and the front-end digital voltage signal, and use it as the input power of the surgical generator.

[0034] For example, when the control module 40 controls the conduction state of the upper-arm power device Q1 and the lower-arm power device Q2, the control signal can be a sinusoidal signal. During the first half cycle of the control signal, the control signal can control the upper-arm power device Q1 to be on and the lower-arm power device Q2 to be off. The current sampling device and voltage sampling device of the upper-arm power device Q1 can collect the current and voltage of the upper-arm power device Q1 and transmit them to the control module 40. The control module 40 can determine the input power P1 = I1 * U1 for the first half cycle based on the current and voltage of the upper-arm power device Q1; where I1 is the current value of the upper-arm power device Q1 and U1 is the voltage value of the upper-arm power device Q1. During the second half cycle of the control signal, the control signal can control the upper-arm power device Q1 to be off and the lower-arm power device Q2 to be on. The current sampling device and voltage sampling device of the lower-arm power device Q2 can collect the current and voltage of the lower-arm power device Q2 and transmit them to the control module 40. The control module 40 can determine the input power P2 = I2 * U2 for the second half-cycle based on the current and voltage of the lower-arm power device Q2, where I2 is the current value of the lower-arm power device Q2 and U2 is the voltage value of the lower-arm power device Q2. Thus, the full-cycle input power Pin = P1 + P2 = I1 * U1 + I2 * U2 of the surgical generator can be determined based on the input power of the first half-cycle and the input power of the second half-cycle.

[0035] The current sampling device 301 in the back-end sampling module 30 can collect the current on the ultrasonic transducer side and output it to the control module 40 through the current sampling circuit 303. The voltage sampling device 302 in the back-end sampling module 30 can collect the voltage on the ultrasonic transducer side and output it to the control module 40 through the voltage sampling circuit 304. The analog-to-digital converter 401 of the control module 40 can convert the back-end analog current signal provided by the current sampling circuit 303 and the back-end analog voltage signal provided by the voltage sampling circuit 304 into a back-end digital current signal and a back-end digital voltage signal, respectively, and output them to the processor 402. The processor 402 can perform real-time parameter recognition on the back-end digital current signal and the back-end digital voltage signal, and calculate the back-end power signal based on the back-end digital current signal and the back-end digital voltage signal, and use it as the output power of the surgical generator.

[0036] After determining the input power and output power of the surgical generator, the topological efficiency value of the surgical generator can be determined based on the output power and input power. This avoids the need for external equipment to measure the efficiency of the surgical generator. Furthermore, the input power of the surgical generator can be measured in real time during use of the surgical generator. Furthermore, the topological efficiency value of the surgical generator can be measured in real time based on the input power and output power of the surgical generator, thereby improving the accuracy of measuring the efficiency of the surgical generator. For example, the input power of the surgical generator is the total power, the output power of the surgical generator is the effective power, and the total power of the surgical generator is the sum of the active power and reactive power of the surgical generator. At this time, the topological efficiency value of the surgical generator is θ = P 有功 / P 总工 =P 有功 / (P 有功 +P 无功 )=1 / (1+P 无功 / P 有功 )=1 / {1+[(I1 2 *R 上 )+(I2 2 *R 下 )] / (I1 负载 *U1 负载 )}=1 / [1+C*M*(△T 上 +△T 下 ) / (I1 负载 *U1 负载 )]; among them, I1 负载 is the current on the ultrasonic transducer side per unit cycle, U1 负载 is the voltage on the ultrasonic transducer side per unit period.

[0037] In addition, the main factor affecting the efficiency of the surgical generator topology is the conversion efficiency of the push-pull circuit 210. The conversion efficiency of the push-pull circuit 210 is related to temperature. The conversion efficiency of the push-pull circuit 210 is the ratio of the active power of the push-pull circuit 210 to the total power, and the total power of the push-pull circuit 210 is the sum of the active power and reactive power of the push-pull circuit 210. Among them, the reactive power of the push-pull circuit 210 is the power lost in the form of heat energy, which mainly includes the conduction loss and switching loss of the push-pull circuit 210. According to the calculation formula of thermal power, the reactive power P of the push-pull circuit 210 can be determined 无 =I 2 R, where I is the on-state current of the push-pull circuit 210 and R is the on-state impedance of the push-pull circuit 210. The reactive power of the push-pull circuit 210 is converted into heat energy and released in the form of heat energy. The heat energy formula of the push-pull circuit 210 is: Q = C * M * ΔT = I 2R, where Q is the thermal energy of the push-pull circuit 210, M is the mass of the power devices in the push-pull circuit 210, C is the specific heat capacity of the object, and ΔT is the temperature change of the power devices in the push-pull circuit 210. The higher the temperature, the more power the push-pull circuit 210 consumes as thermal energy, i.e., the higher the reactive power of the push-pull circuit 210. This results in a lower active power of the push-pull circuit 210, i.e., a lower conversion efficiency of the push-pull circuit 210. The real-time temperature of the push-pull circuit 210 is detected in real time by the temperature sampling device 203 and output to the control module 40. The control module 40 reversely adjusts the conduction current of the push-pull circuit 210 based on the real-time temperature. This improves the conversion efficiency of the push-pull circuit 210 when the conversion efficiency decreases, thereby improving the topological efficiency of the surgical generator and ensuring the working efficiency of the surgical instrument connected to the ultrasonic transducer.

[0038] Exemplarily, the upper half-bridge driving circuit 211 in the push-pull circuit 210 includes an upper bridge arm power device Q1, and the lower half-bridge driving circuit 212 includes a lower bridge arm power device Q2. The temperature sampling device 203 may include two, respectively provided on the upper bridge arm power device Q1 and the lower bridge arm power device Q2, for respectively obtaining the temperature of the upper bridge arm power device Q1 and the lower bridge arm power device Q2 in real time, and transmitting the collected analog temperature signal to the control module 40 through the temperature sampling circuit 206. The analog-to-digital converter 401 of the control module 40 converts the analog temperature signal into a digital temperature signal and outputs it to the processor 402. The processor 402 adjusts the control signal according to the change of the digital temperature signal and outputs it to the gate of the upper bridge arm power device Q1 and the lower bridge arm power device Q2. Specifically, when the control signal is a sinusoidal AC signal, in the first half cycle of the control signal, the control signal controls the upper bridge arm power device Q1 to turn on and the lower bridge arm power device Q2 to turn off. At this time, the reactive power P of the push-pull circuit 210 无1 =I 2 R=I1 2 R 上 ; Among them, I1 is the conduction current of the upper arm power device Q1, R 上 is the on-state internal resistance of the upper arm power device Q1. Then, according to the conversion of reactive power into heat energy and the release of heat energy, and the heat energy formula of the upper arm power device Q1, the heat energy formula of the upper arm power device Q1 is determined as follows: Q 上 =C1*M1*△T 上 ; Among them, △T 上 is the temperature change value of the upper bridge arm power device Q1, M1 is the mass of the upper bridge arm power device Q1, and C1 is the specific heat capacity of the material of the upper bridge arm power device Q1. In the second half cycle of the control signal, the control signal controls the upper bridge arm power device Q1 to be turned off and the lower bridge arm power device Q2 to be turned on. At this time, the reactive power P of the push-pull circuit 210 无2 =I 2 R=I22 R 下 ; Among them, I2 is the conduction current of the lower bridge arm power device Q2, R 下 is the conduction internal resistance of the lower arm power device Q2. Then, according to the conversion of reactive power into heat energy and the release of heat energy, and the heat energy formula of the lower arm power device Q2, the heat energy formula of the lower arm power device Q2 is determined as follows: Q 下 =C2*M2*△T 下 ; Among them, △T 下 is the temperature change value of the lower bridge arm power device Q2, M2 is the mass of the lower bridge arm power device Q2, and C2 is the specific heat capacity of the material of the lower bridge arm power device Q2. Among them, M1 and M2 can be equal, and C1 and C2 can be equal. Then, within the unit cycle of the control signal, the reactive power P of the push-pull circuit 210 is 无 =I 2 R=P 无1 +P 无2 =(I1 2 R 上 +I2 2 R 下 )=C*M*(△T 上 +△T 下 )=(I1 2 *R 上 )+(I2 2 *R 下 ). Where M is the mass of the power device, C is the specific heat capacity of the power device material, I1 is the on-state current of the upper arm power device Q1, R 上 is the equivalent impedance of the upper arm power device Q1, I2 is the conduction current of the lower arm power device Q2, R 下 = is the equivalent impedance of the lower bridge arm power device Q2. Thus, the change in conversion efficiency of the push-pull circuit 210 can be determined according to the temperature change of the upper bridge arm power device Q1 and the lower bridge arm power device Q2, that is, the conversion efficiency of the push-pull circuit 210 decreases as the temperature increases.

[0039] The upper-arm power device Q1 and the lower-arm power device Q2 adjust their conduction currents according to the gate control signal. When the temperature of the upper-arm power device Q1 and the lower-arm power device Q2 is relatively high, the control module 40 can control the conduction degree of the upper-arm power device Q1 and the lower-arm power device Q2 to decrease, thereby reducing the conduction current of the upper-arm power device Q1 and the lower-arm power device Q2. This can reduce the reactive power of the upper-arm power device Q1 and the lower-arm power device Q2 when they are on, thereby increasing the active power of the upper-arm power device Q1 and the lower-arm power device Q2, improving the conversion efficiency of the upper-arm power device Q1 and the lower-arm power device Q2, and thus improving the topological efficiency value of the surgical generator.

[0040] The technical solution of this embodiment provides a front-end sampling module to collect the current and voltage of the upper-arm power devices and the lower-arm power devices, and a back-end sampling module to collect the current and voltage on the ultrasonic transducer side. The control module then calculates the input power based on the front-end current and voltage, and the output power based on the back-end current and voltage. This allows the topological efficiency of the surgical generator to be determined based on the output power and input power. This eliminates the need for external equipment to measure the efficiency of the surgical generator. Furthermore, the input power of the surgical generator can be measured in real time during use, and the efficiency of the surgical generator can be measured in real time based on the input and output power of the surgical generator, thereby improving the accuracy of surgical generator efficiency measurement. Furthermore, the topological efficiency of the surgical generator can be adjusted based on temperature, thereby improving the power utilization of the ultrasonic generator and the output efficiency of the ultrasonic surgical system.

[0041] Continue to refer Figure 1 and Figure 2 The driving module 10 also includes the following power devices: a transformer 230, and the front-end sampling module 20 also includes a current sampling device, a voltage sampling device and a temperature sampling device for sampling the transformer 230 and corresponding current sampling circuits, voltage sampling circuits and temperature sampling circuits.

[0042] Specifically, the output end of the upper half-bridge driver circuit 211 is connected to one end of the primary side of the transformer 230, and the output end of the lower half-bridge driver circuit 212 is connected to the other end of the primary side of the transformer 230. The center tap of the primary side of the transformer 230 can be connected to a fixed potential. When the push-pull circuit 210 outputs a drive signal, the potential of the center tap of the primary side of the transformer 230 forms a drive voltage with one end of the primary side of the transformer 230, which is used to drive the ultrasonic transducer. Because the transformer 230 provides electrical isolation, it can ensure the electrical safety of the ultrasonic transducer, thereby improving the safety of the surgical generator. In addition, the front-end sampling module 20 can also include a current sampling device, a voltage sampling device, and a temperature sampling device for sampling the transformer 230, as well as corresponding current sampling circuits, voltage sampling circuits, and temperature sampling circuits. By sampling the current, voltage, and temperature of the transformer 230, the control module 40 can then determine the input power of the primary side of the transformer 230 based on the collected current and voltage signals. This can also be used as the input power of the surgical generator to calculate the topological efficiency value of the surgical generator. Furthermore, the control module 40 may adjust the current of the transformer 230 according to the collected temperature signal to adjust the topological efficiency of the surgical generator.

[0043] In some embodiments, the surgical generator includes a heat dissipation device. When the topological efficiency value calculated in real time by the processor is low and the collected temperature value is high, the control module increases the heat dissipation rate of the heat dissipation device and adjusts the driving signal provided to the ultrasonic transducer.

[0044] Specifically, the heat sink can dissipate heat for the upper and lower arm power devices. When the temperature value collected by the temperature acquisition device is greater than a preset temperature value and the topological efficiency value is less than a preset efficiency threshold, the control module can control the working state of the heat sink and increase the heat dissipation rate of the heat sink, thereby reducing the temperature of the upper and lower arm power devices. This not only reduces the impact of temperature changes on the upper and lower arm power devices, but also ensures the accuracy of the upper and lower arm power devices. In addition, the control module can adjust the current or voltage of the upper and lower arm power devices to adjust the drive signal provided to the ultrasonic transducer, thereby avoiding the phenomenon of continuous temperature increase caused by the increasing current of the upper and lower arm power devices, which is beneficial to controlling the temperature of the upper and lower arm power devices and improving the topological efficiency of the surgical generator. Exemplarily, the heat sink includes a fan. The control module adjusts the fan speed based on the temperature changes of the upper and lower power devices, thereby controlling the fan's exhaust volume and, in turn, adjusting the temperature of the upper and lower power devices based on the exhaust volume. Simultaneously, reducing the current in the upper and lower power devices further controls their temperature, improving the topological efficiency of the surgical generator. Figure 3 This is a schematic diagram of the efficiency of a surgical generator provided by an embodiment of the present invention, wherein the horizontal axis represents time and the vertical axis represents the efficiency of the surgical generator. Figure 4 A schematic diagram of fan speed adjustment provided by an embodiment of the present invention, wherein the horizontal axis is time and the vertical axis is the fan speed. Figure 3 and Figure 4 As shown, the fan speed can be adjusted within a range of 50%-100%. When the surgical generator's efficiency decreases, the fan speed can be increased during this period to increase the fan's exhaust volume, thereby accelerating the heat dissipation of the upper and lower arm power devices and reducing the temperature of the power amplifier module. For example, when the surgical generator's efficiency is less than 75%, the fan speed can be increased from 50% to 100% during this period to increase the fan's exhaust volume.

[0045] As can be seen from the above process, the temperature sampling device and temperature sampling circuit can monitor the temperature status of the upper and lower power devices in real time and output it to the processor. If the temperature of the detected device rises or the driver efficiency falls below the limit set by the algorithm, the processor increases the fan speed and exhaust volume, while also adjusting the output control signal of the driver module to cool the power devices and maintain or improve the output efficiency of the surgical generator.

[0046] In some embodiments, the surgical generator includes a display module or a reminder module. When the topology efficiency value calculated in real time by the processor is low and the collected temperature value is high, and when the topology efficiency of the generator cannot be adjusted after the control module increases the heat dissipation rate of the heat dissipation device, the display module displays a power device failure or the reminder module prompts a power device failure.

[0047] Specifically, the display module or the reminder module is connected to the control module. After the control module controls the heat dissipation rate of the heat dissipation device, the control module can recalculate the topological efficiency of the surgical generator. When the difference between the current topological efficiency and the previous topological efficiency is less than a preset value, the control module can output a fault signal to the display module, which then displays power device fault information based on the fault signal. Alternatively, the control module can output a reminder signal to the reminder module, which then displays a power device fault based on the reminder signal.

[0048] In some embodiments, the surgical generator includes a display module for displaying the identified current value, voltage value, and temperature value, as well as the topology efficiency value.

[0049] Specifically, when the surgical generator includes a display module, the display module is connected to the control module. After the control module identifies the current, voltage, and temperature values ​​at the front end, as well as the current and voltage values ​​at the back end based on the sampled signals, the control module can output the current, voltage, and temperature values ​​at the front end, as well as the current and voltage values ​​at the back end, to the display module, allowing the display module to display the current, voltage, and temperature values ​​at the front end, as well as the current and voltage values ​​at the back end. After the control module determines the topological efficiency value of the surgical generator based on the current and voltage values ​​at the front end, as well as the current and voltage values ​​at the back end, the control module can output the topological efficiency value to the display module, allowing the display module to display the topological efficiency value. This facilitates intuitive observation of the operating status of the surgical generator. When the topological efficiency value of the surgical generator is relatively low, timely adjustments can be made to maintain the surgical generator at a high efficiency state. Furthermore, the aging status of the surgical generator can be determined based on changes in the efficiency of the surgical generator, thereby reducing the risk of aging-related problems in the surgical generator. For example, the display module can be a display screen or other display module.

[0050] As can be seen from the above process, the display module can display the efficiency status of the surgical generator in real time, facilitating intuitive assessment of the generator's aging status based on its efficiency status. When the generator's efficiency falls below a minimum limit, prompts and alarms are issued, facilitating return of the generator to the factory for maintenance and reducing the risks posed to operators and subjects by equipment aging.

[0051] In some embodiments, the current sampling device is selected from: a sampling resistor, a sampling chip, a Hall sensor, or a current transformer.

[0052] Specifically, Figure 2 The current sampling device includes a sampling resistor. For example, the current sampling device in the front-end sampling module includes a first sampling resistor R1 and a second sampling resistor R2, which are connected in series to the loops of the upper-arm power device Q1 and the lower-arm power device Q2, respectively, to collect the current of the upper-arm power device Q1 and the lower-arm power device Q2. Figure 5 This is a schematic diagram of the principle of a current sampling circuit provided by the utility model, such as Figure 5 As shown, the front-end sampling module includes two current sampling circuits 204, which respectively collect the current of the upper bridge arm power device Q1 and the lower bridge arm power device Q2. The current sampling device in the back-end sampling module includes a third sampling resistor R3, which is connected in series to the loop of the ultrasonic transducer to collect the current on the ultrasonic transducer side. Figure 5 The back-end sampling module includes a current sampling circuit 303 for collecting the current on the ultrasonic transducer side.

[0053] Figure 6 This is a schematic diagram of the principle of a temperature sampling circuit provided by the utility model. Figure 6 As shown, when the upper bridge arm power device Q1 and the lower bridge arm power device Q2 are respectively provided with a temperature sampling device 203, the front-end sampling module includes two temperature sampling circuits 206 to respectively collect the temperatures of the upper bridge arm power device Q1 and the lower bridge arm power device Q2.

[0054] Continue to refer Figure 2 In some embodiments, the voltage sampling device in the back-end sampling module includes a fourth sampling resistor R4 and a fifth sampling resistor R5. The fourth sampling resistor R4 and the fifth sampling resistor R5 are connected in parallel to the loop of the ultrasonic transducer to collect the voltage on the ultrasonic transducer side by voltage division.

[0055] Figure 7 This is a schematic diagram of a voltage sampling circuit provided by the utility model, as shown in FIG. Figure 7 As shown, when the front-end sampling module includes two voltage sampling devices to respectively sample the voltages of the upper bridge arm power device Q1 and the lower bridge arm power device Q2, the front-end sampling module includes two voltage sampling circuits 205 to respectively sample the voltages of the upper bridge arm power device Q1 and the lower bridge arm power device Q2. At the same time, the back-end sampling module includes a voltage sampling circuit 304 to sample the voltage on the ultrasonic transducer side.

[0056] In some embodiments, the processor includes any one of the following chips: a microcontroller unit, a programmable logic array, a digital signal processing technology, a direct digital frequency synthesis chip, and an analog-to-digital conversion chip.

[0057] Among them, any one of a microcontroller unit (MCU), a field programmable gate array (FPGA), a digital signal processing technology (DSP), a direct digital frequency synthesis (DDS) chip, and an analog-to-digital conversion chip (DAC) can be used as a processor.

[0058] In some embodiments, the temperature sampling device is selected from: a thermistor, an IC temperature sensor, a resistance temperature detector, an infrared temperature sensor, or a thermocouple.

[0059] In some embodiments, the surgical generator further comprises a communication module for remotely transmitting the current value, voltage value, temperature value and calculated topology efficiency value identified by the processor to a server.

[0060] Specifically, the communication module enables communication between the surgical generator and the server. The communication module is connected to the processor in the control module. After the processor identifies current, voltage, and temperature values ​​and calculates the topological efficiency value, it transmits these values ​​to the communication module and, through it, to the server, facilitating remote monitoring of the surgical generator's topological efficiency.

[0061] The present invention also provides an ultrasonic surgical system including the surgical generator provided in any embodiment of the present invention. Since the ultrasonic surgical system includes the surgical generator provided in any embodiment of the present invention, it has the same beneficial effects as the ultrasonic generator provided in any embodiment of the present invention, and will not be further described here.

[0062] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A surgical generator for providing a driving signal to an ultrasonic transducer connected thereto, characterized in that: The generator comprises: A driving module, comprising a push-pull circuit and a DC voltage conversion circuit for providing a specific DC voltage therefor, wherein the push-pull circuit comprises an upper half-bridge driving circuit and a lower half-bridge driving circuit for providing the driving signal; A front-end sampling module, comprising a current sampling device, a voltage sampling device, and a temperature sampling device for sampling the upper arm power device and the lower arm power device of the push-pull circuit, and corresponding current sampling circuits, voltage sampling circuits, and temperature sampling circuits; A back-end sampling module, comprising a current sampling device and a voltage sampling device for sampling the ultrasonic transducer and corresponding current sampling circuits and voltage sampling circuits; A control module includes an analog-to-digital converter and a processor communicatively connected to the analog-to-digital converter. The analog-to-digital converter is connected to the current sampling circuit, voltage sampling circuit, and temperature sampling circuit of the front-end sampling module, and the analog-to-digital converter is also connected to the current sampling circuit and voltage sampling circuit of the back-end sampling module. The processor performs real-time parameter identification on the collected current values, voltage values, and temperature values ​​after conversion by the analog-to-digital converter, and calculates the topological efficiency value of the surgical generator in real time. The processor adjusts the surgical generator according to the topological efficiency value to ensure the working effect of the surgical instrument connected to the ultrasonic transducer.

2. The surgical generator according to claim 1, wherein The driving module further includes the following power devices: a transformer, and the front-end sampling module further includes a current sampling device, a voltage sampling device and a temperature sampling device for sampling the transformer and corresponding current sampling circuits, voltage sampling circuits and temperature sampling circuits.

3. The surgical generator according to claim 1 or 2, characterized in that The surgical generator includes a heat dissipation device. When the topological efficiency value calculated in real time by the processor is low and the collected temperature value is high, the control module increases the heat dissipation rate of the heat dissipation device and adjusts the driving signal provided to the ultrasonic transducer.

4. The surgical generator according to claim 3, wherein The surgical generator includes a display module or a reminder module. When the topological efficiency value calculated in real time by the processor is low and the collected temperature value is high, and when the topological efficiency of the generator cannot be adjusted after the control module increases the heat dissipation rate of the heat dissipation device, the display module displays a power device failure or the reminder module prompts a power device failure.

5. The surgical generator according to claim 1, wherein The current sampling device is selected from: a sampling resistor, a sampling chip, a Hall sensor or a current transformer.

6. The surgical generator according to claim 1, wherein The processor includes any one of the following chips: a micro control unit, a programmable logic array, a digital signal processing technology, a direct digital frequency synthesis chip and an analog-to-digital conversion chip.

7. The surgical generator according to claim 1 or 4, characterized in that The surgical generator includes a display module for displaying the identified current value, voltage value, temperature value and topological efficiency value.

8. The surgical generator according to claim 1, wherein The temperature sampling device is selected from: a thermistor, an IC temperature sensor, a resistance temperature detector, an infrared temperature sensor or a thermocouple.

9. The surgical generator according to claim 1, wherein The surgical generator further includes a communication module for remotely transmitting the current value, voltage value, temperature value and calculated topological efficiency value identified by the processor to a server.

10. An ultrasonic surgical system, characterized in that: A surgical generator comprising the device of any one of claims 1-9.

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