Transducer driving circuit and ultrasonic operation equipment

Abstract

The utility model provides a transducer driving circuit and ultrasonic operation equipment. The transducer driving circuit comprises a matching module and an isolation module, the matching module is used for matching the power supply signal generated by the driving power supply and transmitting the matched power supply signal to the isolation module; and the isolation module is used for isolating the matched power supply signal and transmitting the isolated power supply signal to the ultrasonic transducer for driving. According to the utility model, the matched power supply signal is isolated from the ultrasonic transducer through the isolation module, and then the isolated power supply signal is transmitted to the ultrasonic transducer for driving, so that compared with the existing matching circuit, the impedance of the matching circuit can influence the capacitance in the transducer; according to the utility model, the matching module is isolated from the ultrasonic transducer, so that the influence on capacitance in the transducer can be reduced, the subsequent driving of the transducer is facilitated, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a transducer driving circuit and ultrasonic surgical equipment. Background Art

[0002] Currently, in ultrasonic surgical equipment (such as ultrasonic bone knife products or ultrasonic cutting hemostatic knife products), in order to achieve stable driving of the transducer, a matching circuit is generally set at the input end of the transducer, such as inductor (L) matching, inductor-capacitor (LC) matching, etc. Because it is set at the input end of the transducer, it can also be called front-end matching.

[0003] However, whether it is the existing L matching or LC matching, its own impedance will affect the capacitance in the transducer, resulting in difficulty in driving the transducer and poor user experience.

[0004] The above contents are only used to assist in understanding the technical solution of the present utility model and do not constitute an admission that the above contents are prior art. Utility Model Content

[0005] The main purpose of the utility model is to provide a transducer driving circuit and an ultrasonic surgical device, aiming to solve the technical problem in the prior art that the impedance in the matching circuit affects the capacitance in the transducer, resulting in difficulty in driving the transducer and poor user experience.

[0006] To achieve the above object, the utility model provides a transducer driving circuit, the transducer driving circuit comprising: a matching module and an isolation module;

[0007] Wherein, the matching module is connected to the driving power supply and the isolation module respectively, and the isolation module is also connected to the ultrasonic transducer;

[0008] The matching module is used to match the power signal generated by the driving power supply and transmit the matched power signal to the isolation module;

[0009] The isolation module is used to isolate the matched power supply signal and transmit the isolated power supply signal to the ultrasonic transducer for driving.

[0010] Optionally, the matching module includes: an inductor unit and a capacitor unit;

[0011] Wherein, the inductor unit is connected to the driving power supply and the capacitor unit respectively, and the capacitor unit is also connected to the isolation module;

[0012] The inductor unit is used to perform inductive reactance matching on the power supply signal and transmit the power supply signal after inductive reactance matching to the capacitor unit;

[0013] The capacitor unit is used to perform capacitive reactance matching on the power supply signal after the inductive reactance matching, and transmit the obtained matched power supply signal to the isolation module.

[0014] Optionally, the isolation module includes: a first transformer;

[0015] The first input end of the first transformer is connected to the capacitor unit, the second input end of the first transformer is connected to the driving power supply, and the first output end of the first transformer and the second output end of the first transformer are both connected to the ultrasonic transducer.

[0016] Optionally, the number of the capacitor units is multiple, and the matching module further includes: a switching unit;

[0017] Wherein, the switching unit is connected to the inductor unit and each of the capacitor units respectively, and each of the capacitor units is also connected to the isolation module;

[0018] The switching unit is used to conduct the loop between the inductor unit and the corresponding capacitor unit, and transmit the power supply signal after the inductance matching to the corresponding capacitor unit.

[0019] Optionally, the switching unit includes: a relay;

[0020] Wherein, the first end of the relay is connected to the inductor unit, and the second end of the relay is connected to the corresponding capacitor unit.

[0021] Optionally, the transducer driving circuit further includes: an inverter module;

[0022] Wherein, the inverter module is connected to the driving power supply and the matching module respectively;

[0023] The inversion module is used to invert the power signal generated by the driving power supply and transmit the inverted power signal to the matching module.

[0024] Optionally, the transducer driving circuit further includes: a voltage regulating module;

[0025] Wherein, the voltage regulating module is connected to the inverter module and the matching module respectively;

[0026] The voltage regulating module is used to regulate the voltage of the inverted power signal and transmit the regulated power signal to the matching module.

[0027] Optionally, the transducer driving circuit further includes: an acquisition module and a feedback module;

[0028] Wherein, the acquisition module is connected to the isolation module and the feedback module respectively, and the feedback module is also connected to the inverter module;

[0029] The acquisition module is used to acquire the isolated power supply signal and transmit the isolated power supply signal to the feedback module;

[0030] The feedback module is used to adjust the duty cycle of the PWM signal according to the isolated power supply signal, and transmit the adjusted PWM signal to the inverter module;

[0031] The inverter module is further used to invert the power signal generated by the driving power supply according to the adjusted PWM signal.

[0032] Optionally, the acquisition module includes: a current acquisition unit and a voltage acquisition unit;

[0033] Wherein, the current acquisition unit is connected to the isolation module and the feedback module respectively, and the voltage acquisition unit is connected to the isolation module and the feedback module respectively;

[0034] The current acquisition unit is used to acquire the current value of the isolated power supply signal and transmit the generated current signal to the feedback module;

[0035] The voltage acquisition unit is used to acquire the voltage value of the isolated power supply signal and transmit the generated voltage signal to the feedback module;

[0036] The feedback module is further used to adjust the duty cycle of the PWM signal according to the current signal and the voltage signal.

[0037] In addition, to achieve the above-mentioned purpose, the present invention also proposes an ultrasonic surgical device, which includes the transducer driving circuit as described above.

[0038] The utility model proposes a transducer driving circuit and an ultrasonic surgical device, the transducer driving circuit comprising: a matching module and an isolation module; wherein the matching module is connected to the driving power supply and the isolation module respectively, and the isolation module is also connected to the ultrasonic transducer; the matching module is used to match the power signal generated by the driving power supply, and transmit the matched power signal to the isolation module; the isolation module is used to isolate the matched power signal, and transmit the isolated power signal to the ultrasonic transducer for driving. Since the utility model isolates the matched power signal from the ultrasonic transducer through the isolation module, and then transmits the isolated power signal to the ultrasonic transducer for driving, compared with the existing matching circuit whose own impedance will affect the capacitance in the transducer, the utility model isolates the matching module from the ultrasonic transducer, thereby reducing the impact on the capacitance in the transducer, which is beneficial to the subsequent driving of the transducer and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0040] Figure 1 It is the equivalent schematic diagram of the transducer in the LC matching method;

[0041] Figure 2 A structural block diagram of a first embodiment of a transducer driving circuit proposed in an embodiment of the utility model;

[0042] Figure 3 A schematic diagram of the structure of a matching module in a first embodiment of a transducer driving circuit proposed in an embodiment of the utility model;

[0043] Figure 4 A circuit schematic diagram of an isolation module in a first embodiment of a transducer driving circuit according to an embodiment of the present utility model;

[0044] Figure 5 A structural block diagram of a second embodiment of a transducer driving circuit proposed in an embodiment of the utility model;

[0045] Figure 6 A circuit schematic diagram of a switching unit in a second embodiment of a transducer driving circuit according to an embodiment of the present utility model;

[0046] Figure 7A structural block diagram of a third embodiment of a transducer driving circuit proposed in an embodiment of the utility model;

[0047] Figure 8 This is a circuit schematic diagram of a third embodiment of a transducer driving circuit proposed in an embodiment of the utility model.

[0048] Description of Figure Numbers:

[0049]

[0050] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0054] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0055] It should be noted that, currently on ultrasonic surgical equipment (such as ultrasonic bone knife products or ultrasonic cutting hemostatic knife products), in order to achieve stable driving of the transducer, a matching circuit is generally set at the input end of the transducer, such as inductor (Inductor, L) matching, inductor-capacitor (Inductor-Capacitor, LC) matching, etc. Since it is set at the input end of the transducer, it can also be called front-end matching.

[0056] However, whether it is L matching or LC matching, its own impedance will affect the capacitance in the transducer. Figure 1 , Figure 1 It is an equivalent schematic diagram of the transducer in the LC matching method, such as Figure 1 As shown, the transducer can be equivalent to two inductors, three capacitors and one resistor, including a first inductor L1, a second inductor L2, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first resistor R1;

[0057] The first end of the first inductor L1 is connected to the existing LC matching circuit, the other end of the first inductor L1 is respectively connected to the first end of the first capacitor C1, the first end of the second capacitor C2 and the first end of the first resistor R1, the second end of the first resistor R1 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is respectively connected to the second end of the first capacitor C1, the second end of the second capacitor C2 and the LC matching circuit. Figure 1 , the front-end matching will be Figure 1 The second capacitor C2 has an impact, making it difficult to drive the transducer and resulting in a poor user experience.

[0058] Therefore, in order to solve the above defects, the present embodiment may provide a transducer driving circuit, which isolates the matched power signal from the ultrasonic transducer 4 through the isolation module 2, and then transmits the isolated power signal to the ultrasonic transducer 4 for driving. Compared with the existing matching circuit whose own impedance will affect the capacitance in the transducer, the present embodiment isolates the matching module 1 from the ultrasonic transducer 4, thereby reducing the impact on the capacitance in the transducer, which is beneficial to the subsequent driving of the transducer and improves the user experience.

[0059] For ease of understanding, the following combination Figures 2 to 8 The transducer driving circuit provided in the embodiment of the present application is specifically introduced.

[0060] Reference Figure 2 , Figure 2 This is a structural block diagram of the first embodiment of the transducer driving circuit proposed in the embodiment of the utility model.

[0061] like Figure 2As shown, in this embodiment, the transducer driving circuit includes: a matching module 1 and an isolation module 2; wherein the matching module 1 is connected to the driving power supply 3 and the isolation module 2 respectively, and the isolation module 2 is also connected to the ultrasonic transducer 4.

[0062] It should be noted that the above-mentioned transducer driving circuit in this embodiment can be used in the scenario of driving the ultrasonic transducer 4, and of course it can also be used in other driving scenarios. This embodiment is not limited to this. The above-mentioned ultrasonic transducer 4 in this embodiment is illustrated using an ultrasonic knife head.

[0063] It is understandable that the driving power source 3 may be a power source for driving the ultrasonic blade. This embodiment uses a 48V DC power source as the driving power source 3 for illustration, but is not limited thereto.

[0064] The matching module 1 is used to match the power signal generated by the driving power supply 3 and transmit the matched power signal to the isolation module 2;

[0065] The isolation module 2 is used to isolate the matched power supply signal and transmit the isolated power supply signal to the ultrasonic transducer 4 for driving.

[0066] It should be understood that the matching module 1 may be a module with a matching function, and may be composed of an LC matching circuit or an L matching circuit. This embodiment uses an LC matching circuit for illustration, and further refers to Figure 3 , Figure 3 This is a schematic diagram of the structure of the matching module 1 in the first embodiment of the transducer driving circuit proposed in the embodiment of the utility model. Figure 3 As shown, in this embodiment, the matching module 1 may include: an inductor unit 11 and a capacitor unit 12; wherein the inductor unit 11 is connected to the driving power supply 3 and the capacitor unit 12 respectively, and the capacitor unit 12 is also connected to the isolation module 2;

[0067] The inductor unit 11 is used to perform inductive reactance matching on the power supply signal and transmit the power supply signal after inductive reactance matching to the capacitor unit 12;

[0068] The capacitor unit 12 is used to perform capacitive reactance matching on the power supply signal after the inductive reactance matching, and transmit the obtained matched power supply signal to the isolation module 2.

[0069] It should also be noted that, in this embodiment, the inductor unit 11 may be provided with an inductor, and the capacitor unit 12 may be provided with a capacitor, and LC impedance matching is achieved by connecting the inductor and the capacitor in series.

[0070] In a specific implementation, the above-mentioned 48V DC power supply transmits the generated power signal to the inductance unit 11 for inductive reactance matching, and then transmits it to the capacitance unit 12 for capacitive reactance matching to obtain a matched power signal, and then transmits the matched power signal to the isolation module 2 for isolation, and after isolation, the isolated power signal can be transmitted to the ultrasonic blade for driving. Compared with the existing matching circuit whose own impedance will affect the capacitance in the transducer, this embodiment isolates the matching module 1 from the ultrasonic transducer 4, thereby reducing the impact on the capacitance in the transducer, which is beneficial to the subsequent driving of the transducer and improves the user experience.

[0071] It should be emphasized that, since the present embodiment is isolated through the matching module 1, the correlation of the ultrasonic transducer 4 to the front-end matching circuit can be reduced, thereby reducing the difficulty of development; and since the existing ones will have an impact on the transducer, the devices required for the LC parameters of the front-end matching unit generally need to adopt higher-precision devices, while the present embodiment reduces the impact on the transducer, and thus relatively low-precision devices can be used, thereby reducing production costs.

[0072] Further, in order to achieve isolation, the isolation module 2 in this embodiment may be provided with a device that can be used to achieve isolation, such as a transformer, a photoelectric coupler, etc. This embodiment uses a transformer for illustration, and reference is made to FIG. Figure 4 , Figure 4 A circuit schematic diagram of the isolation module 2 of the first embodiment of the transducer drive circuit proposed in the embodiment of the utility model;

[0073] like Figure 4 As shown, in this embodiment, the isolation module 2 includes: a first transformer T1;

[0074] The first input terminal (i.e. Figure 4 The first pin of the first transformer T1 is connected to the capacitor unit 12, and the second input terminal of the first transformer T1 (i.e. Figure 4 The second pin of the first transformer T1 in the embodiment of the present invention is connected to the driving power supply 3, and the first output terminal of the first transformer T1 (i.e. Figure 4 The third pin of the first transformer T1) and the second output terminal of the first transformer T1 (ie Figure 4 The fourth pin of the first transformer T1 in the embodiment of the present invention is connected to the ultrasonic transducer 4 (i.e. Figure 4 Ultrasonic blade head) connection.

[0075] It should be noted that the first transformer T1 may be a high-frequency transformer, and the turns ratio of the first transformer T1 may be set according to actual conditions. This embodiment uses N1:N2 for illustration, that is, in a specific implementation, the capacitor unit 12 transmits the matched power signal to the first transformer T1 for isolation, and the first transformer T1 amplifies the matched power signal by N2 / N1 times and transmits it to the ultrasonic blade at the rear end, thereby realizing isolation of the power signal.

[0076] In this embodiment, the above-mentioned 48V DC power supply transmits the generated power signal to the inductor unit 11 for inductive reactance matching, and then transmits it to the capacitor unit 12 for capacitive reactance matching to obtain a matched power signal, and then transmits the matched power signal to the first transformer T1 for isolation. The first transformer T1 amplifies the matched power signal by N2 / N1 times and transmits it to the ultrasonic blade head at the rear end for driving, thereby isolating the power signal. Compared with the existing matching circuit whose own impedance will affect the capacitance in the transducer, this embodiment isolates the matching module 1 from the ultrasonic transducer 4, thereby reducing the impact on the capacitance in the transducer, which is beneficial to the subsequent driving of the transducer and improves the user experience.

[0077] It is also necessary to emphasize that, since the present embodiment is isolated by the first transformer T1, there is no need to match the ultrasonic transducer 4, and only the capacitance value of the ultrasonic transducer 4 at the corresponding frequency needs to be matched.

[0078] Reference Figure 5 , Figure 5 This is a structural block diagram of a second embodiment of a transducer driving circuit proposed in an embodiment of the utility model.

[0079] Considering that an existing matching circuit is generally used for only one type of ultrasonic transducer 4, in order to increase compatibility, this embodiment is compatible with ultrasonic transducers 4 at different frequencies, such as Figure 5 As shown, in this embodiment, the number of the capacitor units 12 is multiple, and the matching module 1 further includes: a switching unit 13; wherein the switching unit 13 is respectively connected to the inductor unit 11 and each of the capacitor units 12, and each of the capacitor units 12 is also connected to the isolation module 2;

[0080] The switching unit 13 is used to conduct the loop between the inductor unit 11 and the corresponding capacitor unit 12 , and transmit the power signal after the inductance matching to the corresponding capacitor unit 12 .

[0081] It should be noted that the number of the above-mentioned capacitor units 12 can be set according to actual conditions, and the capacitance values ​​in each capacitor unit 12 are inconsistent. One capacitor unit 12 can correspond to one frequency, and then one capacitor unit 12 can correspond to an ultrasonic transducer 4 at one frequency. In this embodiment, two of the above-mentioned capacitor units 12 are used for illustration.

[0082] The switching unit 13 can be used to conduct the loop between the inductance unit 11 and each capacitor unit 12. When an ultrasonic transducer at a certain frequency is used, the switching unit 13 and the corresponding capacitor unit 12 can be conducted manually or automatically, and then LC matching is achieved through the capacitor unit 12 and the inductance unit 11, thereby realizing the driving of the ultrasonic transducer 4 at the corresponding frequency band.

[0083] Further, in this embodiment, the switching unit 13 can be described using a relay S, referring to Figure 6 , Figure 6 A circuit schematic diagram of the switching unit 13 in the second embodiment of the transducer driving circuit proposed in the embodiment of the utility model;

[0084] like Figure 6 As shown, the switching unit 13 includes: a relay S;

[0085] The first end of the relay S is connected to the inductor unit 11 , and the second end of the relay S is connected to the corresponding capacitor unit 12 .

[0086] It is understandable that in this embodiment, the inductor unit 11 is described using one inductor, that is, Figure 6 The third inductor L3 in the capacitor unit 12 is described using a capacitor, that is, Figure 6 The fourth capacitor C4 and the fifth capacitor C5 in Figure 6 In the embodiment, a first end of the third inductor L3 is connected to the driving power supply 3, a second end of the third inductor L3 is connected to a first end of the relay S, a second end of the relay S is connected to a first end of the fourth capacitor C4 or a first end of the fifth capacitor C5, and a second end of the fourth capacitor C4 and a second end of the fifth capacitor C5 are both connected to a first input end of the first transformer T1.

[0087] In a specific implementation, the frequency used by the currently used ultrasonic transducer 4 can be determined first, and then the user can manually or automatically determine the corresponding capacitor unit 12, and switch to the capacitor unit 12 by controlling the relay S, so that the third inductor L3 and the corresponding capacitor unit 12 are turned on, and LC matching is performed between the third inductor L3 and the corresponding capacitor unit 12, so that different ultrasonic transducers can be compatible and compatibility is improved.

[0088] Reference Figure 7 , Figure 7This is a structural block diagram of a third embodiment of a transducer driving circuit proposed in an embodiment of the utility model.

[0089] Considering that the 48V DC power supply outputs DC power, and the ultrasonic transducer 4 needs to use AC power, Figure 7 As shown, in this embodiment, the transducer driving circuit further includes: an inverter module 5; wherein the inverter module 5 is connected to the driving power supply 3 and the matching module 1 respectively;

[0090] The inverter module 5 is used to invert the power signal generated by the driving power supply 3 and transmit the inverted power signal to the matching module 1 .

[0091] It should be noted that the above-mentioned inverter module 5 can be a module that converts the DC power generated by the 48V DC power supply into a square wave form to form the above-mentioned inverted power signal. In this embodiment, the above-mentioned inverter module 5 can be composed of a MOS tube. By receiving a PWM signal to control the conduction and closing of the MOS tube, the DC power generated by the 48V DC power supply can be inverted, and the above-mentioned inverted power signal can be obtained and transmitted to the matching module 1. Of course, the above-mentioned inverter module 5 can also be composed of other components that realize the same function, and this embodiment is not limited to this.

[0092] Further, considering that the voltages required by different ultrasonic transducers 4 may be different, Figure 7 As shown, in this embodiment, the transducer driving circuit further includes: a voltage regulating module 6; wherein the voltage regulating module 6 is connected to the inverter module 5 and the matching module 1 respectively;

[0093] The voltage regulating module 6 is used to regulate the voltage of the inverted power signal and transmit the regulated power signal to the matching module 1 .

[0094] It is understandable that the voltage regulating module 6 may be a module for regulating the voltage of the inverted power signal, such as a transformer, etc., which is not limited in this embodiment.

[0095] Furthermore, in a specific implementation, the above-mentioned 48V DC power supply transmits the generated DC power to the inverter module 5, the inverter module 5 converts the DC power into a square wave form, obtains the inverted power signal, and transmits the inverted power signal to the voltage regulating module 6, the voltage regulating module 6 then regulates the voltage according to demand, and transmits the regulated power signal to the matching module 1, and the matching module 1 converts the square wave into a sine wave at the required frequency, and then transmits it to the isolation module 2.

[0096] Further, refer to Figure 8 , Figure 8The circuit schematic diagram of the third embodiment of the transducer driving circuit proposed in the embodiment of the utility model is as follows: Figure 8 As shown, in this embodiment, a full-bridge inverter can be used, that is, the inverter module 5 may include: a first MOS tube MOS1, a second MOS tube MOS2, a third MOS tube MOS3 and a fourth MOS tube MOS4, wherein the first to fourth MOS tubes MOS4 may all be P-channel MOS tubes, and a first end of the driving power supply 3 is respectively connected to the drain of the first MOS tube MOS1 and the drain of the second MOS tube MOS2, a source of the first MOS tube MOS1 is respectively connected to the drain of the voltage regulating module 6 and the third MOS tube MOS3, a source of the second MOS tube MOS2 is respectively connected to the drain of the voltage regulating module 6 and the fourth MOS tube MOS4, a second end of the driving power supply 3 is respectively connected to the source of the third MOS tube MOS3 and the source of the fourth MOS tube MOS4, and a gate of the first MOS tube MOS1, a gate of the second MOS tube MOS2, a gate of the third MOS tube MOS3 and a gate of the fourth MOS tube MOS4 are all used to receive a PWM signal.

[0097] In a specific implementation, the four MOS tubes are alternately turned on through the received PWM signal, so that the DC power generated by the 48V DC power supply can be converted into a square wave form and transmitted to the voltage regulation module 6.

[0098] Further, continue as Figure 8 As shown, in this embodiment, the voltage regulating module 6 may include: a second transformer T2; wherein the first input terminal (ie Figure 8 The first pin of the second transformer T2 is connected to the source of the first MOS transistor MOS1, and the second input terminal of the second transformer T2 (i.e. Figure 8 The second pin of the second transformer T2 is connected to the drain of the fourth MOS tube MOS4, and the first output terminal of the second transformer T2 (i.e. Figure 8 The third pin of the second transformer T2 is connected to the first end of the third inductor L3, and the second output end of the second transformer T2 (ie Figure 8 A fourth pin of the second transformer T2 is connected to the second input terminal of the first transformer T1.

[0099] It should be noted that the second transformer T2 may also be a high-frequency transformer, and the turns ratio of the second transformer T2 may be set according to actual conditions. This embodiment uses N1:N2 for illustration.

[0100] In a specific implementation, after the 48V DC power supply converts the generated DC power into a square wave form, the second transformer T2 can boost the DC power to N2 / N1 times and transmit it to the third inductor L3.

[0101] Further, in order to achieve automatic adjustment, continue as follows Figure 7 As shown, in this embodiment, the transducer driving circuit further includes: an acquisition module 7 and a feedback module 8; wherein the acquisition module 7 is connected to the isolation module 2 and the feedback module 8 respectively, and the feedback module 8 is also connected to the inverter module 5;

[0102] The acquisition module 7 is used to acquire the isolated power signal and transmit the isolated power signal to the feedback module 8;

[0103] The feedback module 8 is used to adjust the duty cycle of the PWM signal according to the isolated power signal, and transmit the adjusted PWM signal to the inverter module 5;

[0104] The inverter module 5 is further used to invert the power signal generated by the driving power supply 3 according to the adjusted PWM signal.

[0105] It can be understood that the above-mentioned acquisition module 7 can be used to collect the current value and voltage value of the isolated power supply signal, and transmit it to the feedback module 8. The feedback module 8 calculates the phase of the isolated power supply signal according to the current value and the voltage value, and generates a PWM signal according to the phase and transmits it to the inverter module 5 to control the conduction timing of the first to fourth MOS tubes MOS4, thereby realizing automatic adjustment of the output voltage.

[0106] Furthermore, in order to collect the current value and voltage value of the isolated power supply signal, continue as follows Figure 7 As shown, the acquisition module 7 includes: a current acquisition unit 71 and a voltage acquisition unit 72;

[0107] The current acquisition unit 71 is connected to the isolation module 2 and the feedback module 8 respectively, and the voltage acquisition unit 72 is connected to the isolation module 2 and the feedback module 8 respectively;

[0108] The current acquisition unit 71 is used to acquire the current value of the isolated power supply signal and transmit the generated current signal to the feedback module 8;

[0109] The voltage acquisition unit 72 is used to acquire the voltage value of the isolated power supply signal and transmit the generated voltage signal to the feedback module 8;

[0110] The feedback module 8 is further configured to adjust the duty cycle of the PWM signal according to the current signal and the voltage signal.

[0111] It should be understood that the current acquisition unit 71 may be composed of any components for collecting current, and the voltage acquisition unit 72 may be composed of any components for collecting voltage, and this embodiment does not impose any limitation on this.

[0112] In a specific implementation, the isolated power signal transmitted from the isolation module 2 to the ultrasonic transducer 4 can be collected by the above-mentioned current acquisition unit 71, and a current signal is generated according to the current value of the isolated power signal and transmitted to the feedback module 8; the voltage value of the isolated power signal can be collected by the above-mentioned voltage acquisition unit 72, and a voltage signal is generated according to the voltage value and transmitted to the feedback module 8; after receiving the current signal and the voltage signal, the feedback module 8 calculates the phase of the isolated power signal, and compares the phase with the preset phase threshold, wherein the preset phase threshold can be set according to the actual situation; finally, a PWM signal is generated according to the comparison result and then transmitted to the first to fourth MOS tubes MOS4, so as to realize closed-loop control of the ultrasonic transducer 4.

[0113] Further, continue to refer to Figure 8 In this embodiment, the voltage acquisition unit 72 may include: a second resistor R2, a third resistor R3 and a first AD acquisition card (ie Figure 8 AD acquisition card 1);

[0114] Among them, the first end of the second resistor R2 is connected to the first output end of the first transformer T1, the second end of the second resistor R2 is respectively connected to the first end of the third resistor R3 and the first AD acquisition card, the second end of the third resistor R3 is connected to the second output end of the first transformer T1, and the first AD acquisition card is also connected to the feedback module 8.

[0115] It should be noted that the above-mentioned first AD acquisition card can be a device for converting analog signals into digital signals. In the present embodiment, since an analog signal is obtained after acquisition through the second resistor R2 and the third resistor R3, after the analog signal is transmitted to the first AD acquisition card, the first AD acquisition card can convert the analog signal into a digital signal, obtain the voltage value of the power supply signal after isolation, and transmit it to the feedback module 8.

[0116] Furthermore, the current acquisition module 7 may include: a fourth inductor L4, a fourth resistor R4 and a second AD acquisition card (ie Figure 8 AD acquisition card 2);

[0117] Among them, the first end of the fourth inductor L4 is connected to the first end of the fourth resistor R4, the first end of the fourth inductor L4 is also grounded, the second end of the fourth inductor L4 is respectively connected to the second end of the fourth resistor R4 and the second AD acquisition card, and the second AD acquisition card is also connected to the feedback module 8.

[0118] It is understandable that the above-mentioned second AD acquisition card can also be a device for converting analog signals into digital signals. The above-mentioned fourth inductor L4 is wrapped around the wire between the second output end of the first transformer T1 and the ultrasonic blade in the form of a coil to facilitate the collection of the current value transmitted from the first transformer T1 to the ultrasonic blade.

[0119] In a specific implementation, since the current value of the isolated power supply signal collected by the fourth inductor L4 is an analog signal, the analog signal can be transmitted to the second AD acquisition card, and the second AD acquisition card can convert the analog signal into a digital signal, obtain the current value of the isolated power supply signal, and transmit it to the feedback module 8.

[0120] Further, continue as Figure 8 As shown, the feedback module 8 may include: a Field-Programmable Gate Array (FPGA) chip, wherein a first input end of the FPGA chip is connected to a first AD acquisition card, a second input end of the FPGA chip is connected to a second AD acquisition card, a first output end of the FPGA chip is connected to a gate of a fourth MOS tube MOS4, a second output end of the FPGA chip is connected to a gate of a second MOS tube MOS2, a third output end of the FPGA chip is connected to a gate of a third MOS tube MOS3, and a fourth output end of the FPGA chip is connected to a gate of a first MOS tube MOS1.

[0121] Through the above-mentioned FPGA chip, the received current value and voltage value can be calculated to obtain the phase of the isolated power supply signal, and the corresponding PWM signal is generated according to the phase and transmitted to the first to fourth MOS tubes MOS4, thereby realizing automatic adjustment.

[0122] To achieve the above-mentioned purpose, the utility model also proposes an ultrasonic surgical device, which includes a transducer driving circuit as described above. The specific structure of the transducer driving circuit refers to the above-mentioned embodiment. Since the ultrasonic surgical device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0123] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A transducer driving circuit, connected to a driving power supply, characterized in that: The transducer driving circuit includes: a matching module and an isolation module; Wherein, the matching module is connected to the driving power supply and the isolation module respectively, and the isolation module is also connected to the ultrasonic transducer; The matching module is used to match the power signal generated by the driving power supply and transmit the matched power signal to the isolation module; The isolation module is used to isolate the matched power supply signal and transmit the isolated power supply signal to the ultrasonic transducer for driving.

2. The transducer driving circuit according to claim 1, characterized in that: The matching module includes: an inductor unit and a capacitor unit; Wherein, the inductor unit is connected to the driving power supply and the capacitor unit respectively, and the capacitor unit is also connected to the isolation module; The inductor unit is used to perform inductive reactance matching on the power supply signal and transmit the power supply signal after inductive reactance matching to the capacitor unit; The capacitor unit is used to perform capacitive reactance matching on the power supply signal after the inductive reactance matching, and transmit the obtained matched power supply signal to the isolation module.

3. The transducer driving circuit according to claim 2, characterized in that: The isolation module includes: a first transformer; The first input end of the first transformer is connected to the capacitor unit, the second input end of the first transformer is connected to the driving power supply, and the first output end of the first transformer and the second output end of the first transformer are both connected to the ultrasonic transducer.

4. The transducer driving circuit according to claim 2, characterized in that: The number of the capacitor units is multiple, and the matching module further includes: a switching unit; Wherein, the switching unit is connected to the inductor unit and each of the capacitor units respectively, and each of the capacitor units is also connected to the isolation module; The switching unit is used to conduct the loop between the inductor unit and the corresponding capacitor unit, and transmit the power supply signal after the inductance matching to the corresponding capacitor unit.

5. The transducer driving circuit according to claim 4, characterized in that: The switching unit comprises: a relay; Wherein, the first end of the relay is connected to the inductor unit, and the second end of the relay is connected to the corresponding capacitor unit.

6. The transducer driving circuit according to any one of claims 1 to 5, characterized in that: The transducer driving circuit further includes: an inverter module; Wherein, the inverter module is connected to the driving power supply and the matching module respectively; The inversion module is used to invert the power signal generated by the driving power supply and transmit the inverted power signal to the matching module.

7. The transducer driving circuit according to claim 6, characterized in that: The transducer driving circuit further includes: a voltage regulating module; Wherein, the voltage regulating module is connected to the inverter module and the matching module respectively; The voltage regulating module is used to regulate the voltage of the inverted power signal and transmit the regulated power signal to the matching module.

8. The transducer driving circuit according to claim 6, characterized in that: The transducer driving circuit further includes: an acquisition module and a feedback module; Wherein, the acquisition module is connected to the isolation module and the feedback module respectively, and the feedback module is also connected to the inverter module; The acquisition module is used to acquire the isolated power supply signal and transmit the isolated power supply signal to the feedback module; The feedback module is used to adjust the duty cycle of the PWM signal according to the isolated power supply signal, and transmit the adjusted PWM signal to the inverter module; The inverter module is further used to invert the power signal generated by the driving power supply according to the adjusted PWM signal.

9. The transducer driving circuit according to claim 8, characterized in that: The acquisition module includes: a current acquisition unit and a voltage acquisition unit; Wherein, the current acquisition unit is connected to the isolation module and the feedback module respectively, and the voltage acquisition unit is connected to the isolation module and the feedback module respectively; The current acquisition unit is used to acquire the current value of the isolated power supply signal and transmit the generated current signal to the feedback module; The voltage acquisition unit is used to acquire the voltage value of the isolated power supply signal and transmit the generated voltage signal to the feedback module; The feedback module is used to adjust the duty cycle of the PWM signal according to the current signal and the voltage signal.

10. An ultrasonic surgical device, characterized in that: The ultrasonic surgical device comprises the transducer driving circuit according to any one of claims 1 to 9.

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