An ultrasonic scalpel system with gear adjustment function

Abstract

The application relates to an ultrasonic knife system with a gear adjusting function, which is characterized in that a first switch, a second switch and a first control chip are arranged in the ultrasonic knife head; when the ultrasonic knife head is inserted into the ultrasonic knife host, the second control chip in the ultrasonic knife host verifies the ultrasonic knife head sent by the first control chip, realizes the identification and verification of the parameters of the ultrasonic knife head, and does not work if the parameters of the ultrasonic knife head cannot pass the verification; when the parameters of the ultrasonic knife head pass the verification, the second control chip continuously generates a square wave signal, the gear determination module judges the gear based on the square wave signal, and obtains the determination result of whether the ultrasonic knife head is in the first gear, the second gear or no gear adjustment; finally, the gear determination module returns the determination result to the second control chip, the second control chip outputs a driving signal corresponding to the gear of the ultrasonic knife, completes the adjustment of the gear, and thus the application can adjust the gear through the ultrasonic knife head.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and in particular relates to an ultrasonic scalpel system with a gear adjustment function. Background Art

[0002] The ultrasonic hemostatic scalpel is a common surgical scalpel. Its characteristics include minimal trauma, low smoke production, and blood coagulation, making it widely used in surgical procedures. The ultrasonic hemostatic scalpel consists of an ultrasonic scalpel unit, an ultrasonic transducer, and an ultrasonic blade. Its operating principle is that the ultrasonic scalpel unit generates a constant current source at a certain frequency, which is fed to the ultrasonic transducer, causing it to operate in a resonant state. The ultrasonic transducer generates mechanical vibrations at this frequency, which in turn drives the ultrasonic blade to generate mechanical vibrations. Due to its high frequency and small amplitude, it can cut small areas of human tissue.

[0003] Currently, most ultrasonic scalpel heads can only operate at fixed gears and do not have a gear adjustment function. Summary of the Invention

[0004] The present invention provides an ultrasonic scalpel system with a gear adjustment function to solve the technical problem in the prior art that ultrasonic scalpel heads can only work at fixed gears and have no gear adjustment function.

[0005] An ultrasonic scalpel system with a gear adjustment function, comprising:

[0006] A first control chip is provided in the ultrasonic cutter head and is used to send pre-stored ultrasonic cutter head parameters when receiving a data signal;

[0007] a second control chip, disposed in the ultrasonic scalpel host and connected to the first control chip, for verifying the parameters of the ultrasonic scalpel head upon receiving the parameters of the ultrasonic scalpel head, and generating a square wave signal when the parameters of the ultrasonic scalpel head are verified;

[0008] A first switch is provided in the ultrasonic scalpel head and is used to set the ultrasonic scalpel head to the first gear when closed;

[0009] a second switch, disposed in the ultrasonic scalpel head, for setting the ultrasonic scalpel head to a second gear when closed;

[0010] The gear position determination module, together with the second control chip, the first switch and the second switch, is used to determine the gear position of the ultrasonic blade head based on the square wave signal. The second control chip is also used to output a drive signal corresponding to the gear position of the ultrasonic blade head.

[0011] In one embodiment of the present invention, the gear position determination module includes:

[0012] a zero-crossing processing circuit, connected to the second control chip, and configured to perform zero-crossing processing on the square wave signal;

[0013] an output circuit is selected, connected to the zero-crossing processing circuit, the first switch, and the second switch, and is configured to output a lower half square wave signal of the square wave signal after the zero-crossing processing when the first switch is closed; and is configured to output an upper half square wave signal of the square wave signal after the zero-crossing processing when the second switch is closed;

[0014] A voltage raising circuit, connected to the selection output circuit, for raising the lower half square wave signal or the upper half square wave signal to above zero;

[0015] A comparison circuit, wherein the input end of the comparison circuit is connected to the voltage lifting circuit, and the output end of the comparison circuit is connected to the second control chip. The comparison circuit is used to compare the lower half-wave square wave signal after the lifting process or the upper half-wave square wave signal after the lifting process with the reference signal to obtain a comparison result; the second control chip is also used to output a drive signal corresponding to the comparison result.

[0016] In one embodiment of the present invention, the ultrasonic knife system further includes a MOS tube;

[0017] The gate of the MOS transistor is connected to the second control chip, the drain of the MOS transistor is connected to an external power supply after being connected in series with a resistor, and the source of the MOS transistor is grounded; the drain of the MOS transistor is also connected to the first control chip; the MOS transistor is used to transmit the data signal generated by the second control chip to the first control chip.

[0018] In one embodiment of the present invention, the ultrasonic scalpel system further includes:

[0019] a power amplifier circuit, connected to the second control chip, and configured to amplify the driving signal;

[0020] an ultrasonic output matching circuit, connected to the power amplifier circuit, for performing output matching on the amplified drive signal;

[0021] The transducer assembly is connected to the ultrasonic output matching circuit and is used to convert the output matched driving signal into mechanical vibration and drive the ultrasonic blade.

[0022] In one embodiment of the present invention, the selection output circuit includes a first resistor, a second resistor, and a bidirectional diode;

[0023] One end of the first resistor is connected with the ground, and the other end of the first resistor is connected with one end of the second resistor and the input end of the upper half tube of the bidirectional diode, and the output end of the lower half tube of the bidirectional diode;

[0024] One end of the second resistor is connected with the drain of the MOS tube, and the other end of the second resistor is connected with the first control chip, and the other end of the second resistor is also connected with one end of the first switch and one end of the second switch;

[0025] The output end of the upper half tube of the bidirectional diode is connected with the other end of the second switch, and the input end of the lower half tube of the bidirectional diode is connected with the other end of the first switch.

[0026] In an embodiment of the present application, the zero-crossing processing circuit comprises a third resistor and a first capacitor, one end of the first capacitor is connected with the second control chip, the other end of the first capacitor is connected with one end of the third resistor, the other end of the third resistor is connected with one end of the second resistor, and the other end of the third resistor is also connected with the voltage lifting circuit through an RC filter circuit.

[0027] In an embodiment of the present application, the RC filter circuit comprises a fourth resistor and a second capacitor, one end of the second capacitor is connected with the other end of the third resistor, the other end of the second capacitor is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with the voltage lifting circuit.

[0028] In an embodiment of the present application, the voltage lifting circuit comprises a fifth resistor and a sixth resistor, one end of the fifth resistor is connected with an external power supply, one end of the sixth resistor is connected with the ground, the other end of the fifth resistor and the other end of the sixth resistor are connected with the other end of the fourth resistor, and the other end of the fifth resistor and the other end of the sixth resistor are also connected with the comparison circuit.

[0029] In an embodiment of the present application, the comparison circuit comprises a first comparator, a second comparator, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor and a thirteenth resistor.

[0030] The opposite phase input end of the first comparator, the non-phase input end of the second comparator and the other end of the fifth resistor and the other end of the sixth resistor are connected, one end of the seventh resistor is connected with the non-phase input end of the first comparator, the other end of the seventh resistor is connected with a reference signal, one end of the eighth resistor is connected with the opposite phase input end of the second comparator, the other end of the eighth resistor is grounded, one end of the ninth resistor is connected with one end of the seventh resistor, the other end of the ninth resistor is connected with one end of the eighth resistor, the output end of the first comparator is connected with the input port of the second control chip after being connected with the tenth resistor in series, the output end of the second comparator is connected with the input port of the first control chip after being connected with the eleventh resistor in series, one end of the twelfth resistor is connected with the output end of the first comparator, the other end of the twelfth resistor is grounded, one end of the thirteenth resistor is connected with the output end of the second comparator, the other end of the thirteenth resistor is grounded.

[0031] In an embodiment of the present application, the ultrasonic knife system further comprises a diode and a third capacitor for supplying power to the first control chip, one end of the third capacitor is connected with the power input end of the first control chip, the other end of the third capacitor is connected with the other end of the first resistor and the ground end of the first control chip, the anode of the diode is connected with the other end of the second resistor, and the cathode of the diode is connected with one end of the third capacitor.

[0032] The present application provides an ultrasonic knife system with gear adjustment function, which has the following advantages: by arranging a first switch, a second switch and a first control chip inside the ultrasonic knife head, when the ultrasonic knife head is inserted into the ultrasonic knife main machine, the second control chip in the ultrasonic knife main machine verifies the ultrasonic knife head sent by the first control chip, realizes the identification and verification of the parameters of the ultrasonic knife head, and if the parameters of the ultrasonic knife head cannot pass the verification, the ultrasonic knife head will not work. When the parameters of the ultrasonic knife head pass the verification, the second control chip continuously generates a square wave signal, and the gear determination module determines the gear based on the square wave signal to obtain the determination result of whether the ultrasonic knife head is in the first gear, the second gear or no gear adjustment. Finally, the gear determination module returns the determination result to the second control chip, and the second control chip outputs a driving signal corresponding to the gear of the ultrasonic knife to complete the adjustment of the gear, so that the present application can adjust the gear through the ultrasonic knife head. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is an equivalent circuit diagram of an ultrasonic transducer according to an example embodiment of the present application;

[0034] Figure 2 is an application scenario diagram of an ultrasonic knife system with gear adjustment function according to an example embodiment of the present application

[0035] Figure 3 This is a structural diagram of an ultrasonic scalpel system with a gear adjustment function, shown in an exemplary embodiment of the present application;

[0036] Figure 4 This is a timing diagram for verifying the ultrasonic scalpel parameters when the ultrasonic scalpel head is inserted into the ultrasonic scalpel host;

[0037] Figure 5 This is a timing diagram of the ultrasonic scalpel host writing data after the ultrasonic scalpel head is used;

[0038] Figure 6 This is a system waveform diagram when neither the first switch nor the second switch is pressed, shown in an exemplary embodiment of the present application;

[0039] Figure 7 This is a system waveform diagram when the first switch is pressed, showing an exemplary embodiment of the present application;

[0040] Figure 8 This is a system waveform diagram when the second switch is pressed, showing an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0042] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0043] In the following description, numerous details are set forth to provide a more thorough explanation of the embodiments of the present invention; however, it is apparent to one skilled in the art that the embodiments of the present invention may be practiced without these specific details.

[0044] Figure 1 This is an equivalent circuit diagram of an ultrasonic transducer shown in an exemplary embodiment of the present application. The ultrasonic scalpel host outputs a specific signal to put the ultrasonic transducer into a resonant state, thereby converting electrical energy into mechanical energy.

[0045] Figure 2 This is an application scenario diagram of an ultrasonic knife system with a gear adjustment function shown in an exemplary embodiment of the present application. Figure 1 As shown, it includes an ultrasonic scalpel host 1, an ultrasonic scalpel host output signal interface 2, an ultrasonic transducer 3, a control chip and circuit 4 in the scalpel head, an ultrasonic scalpel rod 5, a scalpel tip 6, and an ultrasonic scalpel head 7; wherein, the ultrasonic scalpel host 1 provides the ultrasonic signal required by the ultrasonic transducer; a control chip and circuit 4 are arranged inside the ultrasonic scalpel head 7; the working principle of the ultrasonic scalpel head 7 is: the ultrasonic transducer 3 converts electrical energy into mechanical energy, and generates high-speed vibration at the scalpel tip 6 position through the ultrasonic scalpel head 7, thereby realizing surgical cutting; the ultrasonic scalpel rod 5 provides energy transmission; the ultrasonic scalpel host makes the ultrasonic transducer resonate by outputting a signal, and the matching between the ultrasonic scalpel host and the ultrasonic transducer can refer to the existing patent CN112754604B, an automatic matching method of the ultrasonic scalpel host, ultrasonic scalpel system and ultrasonic scalpel system transducer impedance.

[0046] like Figure 3 As shown, the present invention provides an ultrasonic scalpel system with a gear adjustment function, comprising:

[0047] A first control chip is provided in the ultrasonic cutter head and is used to send pre-stored ultrasonic cutter head parameters when receiving a data signal;

[0048] a second control chip, disposed in the ultrasonic scalpel host and connected to the first control chip, for verifying the parameters of the ultrasonic scalpel head upon receiving the parameters of the ultrasonic scalpel head, and generating a square wave signal when the parameters of the ultrasonic scalpel head are verified;

[0049] A first switch is provided in the ultrasonic scalpel head and is used to set the ultrasonic scalpel head to the first gear when closed;

[0050] a second switch, disposed in the ultrasonic scalpel head, for setting the ultrasonic scalpel head to a second gear when closed;

[0051] The gear position determination module, together with the second control chip, the first switch and the second switch, is used to determine the gear position of the ultrasonic blade head based on the square wave signal. The second control chip is also used to output a driving signal corresponding to the gear position of the ultrasonic blade head.

[0052] Figure 4 This is a timing diagram for checking the ultrasonic knife parameters when the ultrasonic knife head is inserted into the ultrasonic knife host, such as Figure 4 As shown in the figure, when the ultrasonic scalpel head is inserted into the ultrasonic scalpel host, the following communication process occurs:

[0053] The ultrasonic knife host single-chip U1 resets the bus and pulls down the bus for a period of time, and after the resetting is completed, the bus is released (the bus release signal is sent to the blade chip U2);

[0054] The blade chip U2 pulls down the bus to respond after receiving the reset and bus release signals, and releases the bus after the response is completed;

[0055] The ultrasonic knife host single-chip U1 sends a read ID command to the blade chip U2 after receiving the response and bus release signals, and the read ID command is accompanied by a CRC check code;

[0056] The blade chip U2 checks the CRC check code when receiving the read ID command, and sends the ID code of the blade chip U2 after the checking is successful;

[0057] The ultrasonic knife host single-chip U1 judges the ID code when receiving the ID code, and completes the ID checking if the ID code is correct, and alarms if the ID code is incorrect; after the ID checking is completed, a read EEPROM command is sent, and the read EEPROM command is accompanied by a CRC check code;

[0058] The blade chip U2 checks the CRC check code when receiving the read EEPROM command, and sends the EEPROM content to the ultrasonic knife host single-chip U1 after the checking is successful.

[0059] The ultrasonic knife host single-chip U1 judges the accuracy of the EEPROM content when receiving the EEPROM content, such as the number of available times and the matching of the blade type, and outputs an alarm if the EEPROM content cannot be matched, and the blade cannot be used; if the matching is successful, the parameters of the blade are calculated through an internal algorithm, and are configured to the ultrasonic output port.

[0060] In addition, after each use, the ultrasonic knife host can also write the use data of the ultrasonic blade into the EEPROM in the first control chip, Figure 5 The timing diagram for the ultrasonic knife host to write data after the ultrasonic blade is used is shown in FIG. 2, Figure 5 After the ultrasonic blade is used, the following communication process occurs:

[0061] The ultrasonic knife host single-chip U1 resets the bus and pulls down the bus for a period of time, and after the resetting is completed, the bus is released (the bus release signal is sent to the blade chip U2);

[0062] The blade chip U2 pulls down the bus to respond after receiving the reset and bus release signals, and releases the bus after the response is completed;

[0063] The ultrasonic knife host single-chip U1 sends a write EEPROM command accompanied by a CRC check code after receiving the response and bus release signals.

[0064] The blade chip U2: When receiving the EEPROM write instruction, it verifies the CRC check code. After the verification is successful, it writes the values ​​of some data during use (such as usage time, number of uses, etc.) to the corresponding storage location, replaces the original content, and sends the storage success information to the ultrasonic knife host microcontroller U1.

[0065] In one embodiment of the present invention, the zero-crossing processing circuit, the selection output circuit, the voltage lifting circuit, and the comparison circuit are all disposed in the ultrasonic scalpel host.

[0066] In one embodiment of the present invention, the gear position determination module includes:

[0067] a zero-crossing processing circuit, connected to the second control chip, and configured to perform zero-crossing processing on the square wave signal;

[0068] an output circuit is selected, connected to the zero-crossing processing circuit, the first switch, and the second switch, and is configured to output a lower half square wave signal of the square wave signal after the zero-crossing processing when the first switch is closed; and is configured to output an upper half square wave signal of the square wave signal after the zero-crossing processing when the second switch is closed;

[0069] A voltage raising circuit, connected to the selection output circuit, for raising the lower half square wave signal or the upper half square wave signal to above zero;

[0070] A comparison circuit, wherein the input end of the comparison circuit is connected to the voltage lifting circuit, and the output end of the comparison circuit is connected to the second control chip. The comparison circuit is used to compare the lower half-wave square wave signal after the lifting process or the upper half-wave square wave signal after the lifting process with the reference signal to obtain a comparison result; the second control chip is also used to output a drive signal corresponding to the comparison result.

[0071] In this embodiment, the zero-crossing processing circuit performs zero-crossing processing on the square wave signal to obtain an AC signal. A bidirectional diode D2 is provided in the selective output circuit. When the first switch S1 or the second switch S2 is closed, the bidirectional diode D2 filters the square wave signal after zero-crossing processing to obtain an upper half-wave signal or a lower half-wave signal. To facilitate comparison, the voltage lifting circuit lifts the upper half-wave signal or the lower half-wave signal above zero to obtain a DC signal, which is then compared with a reference signal to obtain a comparison result. The comparison result between the lifted upper half-wave signal and the reference signal is different from the comparison result between the lifted lower half-wave signal and the reference signal. Therefore, the comparison result can be used to identify whether the first switch S1 or the second switch S2 is closed, thereby outputting a drive signal corresponding to the gear position to drive the transducer.

[0072] Specifically, the second control chip U1 is a single-chip microcomputer.

[0073] In an embodiment of the present application, the ultrasonic knife system further comprises a MOS tube Q1 and a first control chip U2.

[0074] The gate of the MOS tube Q1 is connected with the second control chip U1, the drain of the MOS tube Q1 is connected with an external power source through a resistor, and the source of the MOS tube Q1 is grounded; the drain of the MOS tube Q1 is also connected with the first control chip U2; and the MOS tube Q1 is used to transmit the data signal generated by the second control chip U1 to the first control chip U2.

[0075] The first control chip U2 is arranged in the ultrasonic knife head, and is used to transmit the parameters of the ultrasonic knife head pre-stored in the internal of the first control chip U2 to the second control chip U1 after receiving the data signal.

[0076] In the embodiment, the second control chip U1 and the first control chip U2 are isolated through the MOS tube Q1; when the ultrasonic knife head is inserted into the ultrasonic knife main machine, the IO1 pin of the second control chip U1 will first transmit data to the first control chip U2, and communication is established with the first control chip U2 to identify the type of the knife head and the available number of times, and the parameter information of the knife head is read. Then the second control chip U1 stops transmitting data, and transmits a square wave of a certain frequency through the IO2 pin to identify whether the large or small gear button is pressed; this signal is always maintained; after the large or small gear button is pressed, the main machine outputs ultrasonic waves of different energy sizes according to the different gears. When no button is pressed for a long time, the main machine can stop transmitting the square wave through the IO2, and transmit information through the IO1 to store data in the EEPROM of the first control chip U2; after the storage of data is completed, the square wave transmission of the IO2 can be restored to continue to detect the button pressing information; this period of time is very short, and will not affect the detection of the button pressing.

[0077] In an embodiment of the present application, the ultrasonic knife system further comprises:

[0078] A power amplification circuit is used to amplify the driving signal.

[0079] An ultrasonic output matching circuit is connected with the power amplification circuit, and is used to output match the amplified driving signal.

[0080] A transducer assembly is connected with the ultrasonic output matching circuit, and is used to convert the output-matched driving signal into mechanical vibration, and drive the ultrasonic knife head.

[0081] In this embodiment, the second control chip U1 sends the frequency, voltage, and current signals of the ultrasonic wave to the power amplifier module for signal amplification, and then outputs it to the transducer through the ultrasonic output matching circuit module. At the same time, the ultrasonic output signal (voltage, current, frequency, phase difference) is sampled and fed back to the single-chip microcomputer. The single-chip microcomputer adjusts the output of the frequency, voltage, and current signals of the ultrasonic wave so that the transducer and the cutter head always work in a resonant state, thereby forming a closed-loop system. When the data of U2 is input to the single-chip microcomputer, the MCU can reduce the adjustment speed of the closed-loop system through the parameter value, which is more efficient. How to adjust the uploaded parameters so that the cutter head works in a resonant state can refer to patent CN112754605A, an automatic adjustment method for the impedance of the ultrasonic knife host, ultrasonic knife system, and ultrasonic knife system transducer.

[0082] In one embodiment of the present invention, the selection output circuit includes a first resistor R10, a second resistor R11, and a bidirectional diode D2;

[0083] One end of the first resistor R10 is grounded, and the other end of the first resistor R10 is connected to the input end of the upper half of the bidirectional diode D2 and the output end of the lower half of the bidirectional diode D2;

[0084] One end of the second resistor R11 is connected to the drain of the MOS transistor Q1, and the other end of the second resistor R11 is connected to the first control chip U2. The other end of the second resistor R11 is also connected to one end of the first switch S1 and one end of the second switch S2;

[0085] The output end of the upper half of the bidirectional diode D2 is connected to the other end of the second switch S2 , and the input end of the lower half of the bidirectional diode D2 is connected to the other end of the first switch S1 .

[0086] In one embodiment of the present invention, the zero-crossing processing circuit includes a third resistor R9 and a first capacitor C2; one end of the first capacitor C2 is connected to the second control chip U1, the other end of the first capacitor C2 is connected to one end of the third resistor R9, the other end of the third resistor R9 is connected to one end of the second resistor R11, and the other end of the third resistor R9 is also connected to the voltage lifting circuit through an RC filtering circuit.

[0087] In one embodiment of the present invention, the RC filter circuit includes a fourth resistor R8 and a second capacitor C3, one end of the second capacitor C3 is connected to the other end of the third resistor R9, the other end of the second capacitor C3 is connected to one end of the fourth resistor R8, and the other end of the fourth resistor R8 is connected to the voltage lifting circuit.

[0088] In one embodiment of the present invention, the voltage lifting circuit includes a fifth resistor R6 and a sixth resistor R7, one end of the fifth resistor R6 is connected to an external power supply, one end of the sixth resistor R7 is grounded, the other end of the fifth resistor R6 and the other end of the sixth resistor R7 are connected to the other end of the fourth resistor R8, and the other end of the fifth resistor R6 and the other end of the sixth resistor R7 are also connected to the comparison circuit.

[0089] In one embodiment of the present invention, the comparison circuit includes a first comparator, a second comparator, a seventh resistor R4, an eighth resistor R5, a ninth resistor R24, a tenth resistor R1, an eleventh resistor R2, a twelfth resistor R3, and a thirteenth resistor R4;

[0090] The inverting input terminal of the first comparator and the non-inverting input terminal of the second comparator are connected to the other end of the fifth resistor R6 and the other end of the sixth resistor R7. One end of the seventh resistor R4 is connected to the non-inverting input terminal of the first comparator, and the other end of the seventh resistor R4 is grounded. One end of the eighth resistor R5 is connected to the inverting input terminal of the second comparator, and the other end of the eighth resistor R5 is grounded. One end of the ninth resistor R24 ​​is connected to one end of the seventh resistor R4, and the other end of the ninth resistor R24 ​​is connected to one end of the eighth resistor R5. The output terminal of the first comparator is connected in series with the tenth resistor R1 and then connected to the input port of the second control chip U1. The output terminal of the second comparator is connected in series with the eleventh resistor R2 and then connected to the input port of the second control chip U1. One end of the twelfth resistor R3 is connected to the output terminal of the first comparator, and the other end of the twelfth resistor R3 is connected to a power supply. One end of the thirteenth resistor R4 is connected to the output terminal of the second comparator, and the other end of the thirteenth resistor R4 is connected to a power supply.

[0091] In this embodiment, the specific principle of gear adjustment is as follows:

[0092] IO2 of the microcontroller U1 sends a square wave of a certain frequency (for example, 10KHz), which forms a zero-crossing square wave signal at point A after passing through C2 and R9. Figure 6 This is the system waveform diagram when the first switch and the second switch are not pressed. The waveform diagrams of each point in the system when the first switch and the second switch are not pressed are as follows: Figure 6 As shown;

[0093] Figure 7 This is the system waveform when the first switch is pressed, as shown in Figure 7As shown, the first switch S1 and the second switch S2 are the large and small range buttons respectively, when S1 is pressed, R11, S1, the lower tube of D2, R10 form a loop, A point is clamped at the conduction voltage (usually 0.2V, negligible) of the diode because of the forward diode of D2, thus only the square wave below the zero point at A point. After filtering the DC component through C3, R8, the waveform of B point is the lower half wave square wave signal above the zero point due to the voltage lifting of R6 and R7.

[0094] Figure 8 As shown, when S2 is pressed, R11, S1, the upper tube of D2, R10 form a loop, A point is clamped at the conduction voltage (usually 0.2V, negligible) of the diode because of the reverse diode of D2, thus only the square wave above the zero point at A point. After filtering the DC component through C3, R8, the waveform of B point is the upper half wave square wave signal above the zero point due to the voltage lifting of R6 and R7. Figure 8

[0095] U7 is a comparator chip, after setting the comparison voltage of U7A and U7B of the comparator, the difference of IO3 and IO4 of the high and low level outputs can identify whether S1 or S2 is pressed.

[0096] In an embodiment of the present application, the ultrasonic knife system further comprises a diode D1 and a third capacitor C1 for supplying power to the first control chip U2, one end of the third capacitor C1 is connected with the power input end of the first control chip U2, the other end of the third capacitor C1 is connected with the other end of the first resistor R10 and the ground end of the first control chip U2, the anode of the diode D1 is connected with the other end of the second resistor R11, and the cathode of the diode D1 is connected with one end of the third capacitor C1.

[0097] In the embodiment, when the first control chip U2 is in an idle state, the R12 of the host end is connected with the power supply VCC, so that the first control chip U2 is supplied with power through D1, and the capacitor C1 is charged, and the PIN1 of the first control chip U2 is a power supply pin.

[0098] ​When U2 is reading or writing data, the signal on the chip communication line alternates between high and low levels. When at a high level, the chip communication line supplies power to the first control chip U2 via D1, simultaneously charging capacitor C1 and transmitting the high-level signal to U2's I / O input pin PIN3. When at a low level, C1 discharges to power PIN1 of the first control chip U2, while PIN3 receives a low-level signal. The discharge rate of C1 can be adjusted by the values ​​of R11, R12, and C1. The parameters of R11, R12, and C1 are selected based on the duration of the low-level transmission to avoid prolonged low-level transmission, which could cause the first control chip U2 to stop working due to insufficient power supply to PIN1.

[0099] The EEPROM in the first control chip U2 can be customized to divide the storage unit to store the parameter information of the transducer, the more important ones are the number of times it can be used, the equivalent impedance of resonance, the resonant frequency, the type of the cutter head, etc. When the cutter head leaves the factory, the above parameter information is written according to the measured value of the cutter head. The host can then read the stored parameters and adjust the output parameters to achieve the best matching effect, improve the efficiency of scanning the frequency to find the resonance point, and improve real-time performance. For example, by recording the number of times the cutter head is used, the life and number of times the cutter head can be used can be known, and the user can be reminded to replace the cutter head. For example, if the cutter head is disposable, the user will be directly reminded that it cannot be used again.

[0100] At the same time, the first control chip U2 establishes a communication mechanism with the host's single-chip microcomputer. When a cutter head is inserted, it performs an identification check to determine whether it is from the same manufacturer or an authorized adapter. Only after passing the verification can it be used. Then, through a defined communication method, the parameters stored in the cutter head are read and transmitted to the host for calculation. During the use of the cutter head, the parameters are used to output an adaptation signal, and parameters such as usage time and number of times can be used are updated and stored in U2.

[0101] In summary, the present invention provides an ultrasonic scalpel system with a gear adjustment function, which sets the gear by setting a first switch and a second switch in the ultrasonic scalpel head. When the ultrasonic scalpel head is inserted into the ultrasonic scalpel host, the first control chip in the ultrasonic scalpel host generates a square wave signal, and the square wave signal is subjected to zero-crossing processing by the zero-crossing processing circuit. Then, when the first switch or the second switch is closed, the zero-crossing processed square wave signal is filtered by selecting the output circuit, and only the upper half wave or the lower half wave of the square wave signal is retained. The voltage lifting circuit lifts the voltage of the upper half wave signal or the lower half wave signal so that the upper half wave signal or the lower half wave signal is above zero. The comparison circuit compares the lifted upper half wave signal or the lower half wave signal with the reference signal to obtain a comparison result. The first control chip obtains the gear information of the ultrasonic scalpel head through the comparison result, thereby outputting a drive signal corresponding to the gear, thereby realizing the adjustment of the gear of the ultrasonic scalpel head.

[0102] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. An ultrasonic scalpel system with a gear adjustment function, characterized in that: include: A first control chip is provided in the ultrasonic cutter head and is used to send pre-stored ultrasonic cutter head parameters when receiving a data signal; a second control chip, disposed in the ultrasonic scalpel host and connected to the first control chip, for verifying the parameters of the ultrasonic scalpel head upon receiving the parameters of the ultrasonic scalpel head, and generating a square wave signal when the parameters of the ultrasonic scalpel head are verified; A first switch is provided in the ultrasonic scalpel head and is used to set the ultrasonic scalpel head to the first gear when closed; a second switch, disposed in the ultrasonic scalpel head, for setting the ultrasonic scalpel head to a second gear when closed; a gear position determination module, together with the second control chip, the first switch, and the second switch, for determining the gear position of the ultrasonic blade head based on the square wave signal, and the second control chip is further configured to output a drive signal corresponding to the gear position of the ultrasonic blade head; The gear position determination module includes: a zero-crossing processing circuit, connected to the second control chip, and configured to perform zero-crossing processing on the square wave signal; an output circuit is selected, connected to the zero-crossing processing circuit, the first switch, and the second switch, and is configured to output a lower half square wave signal of the square wave signal after the zero-crossing processing when the first switch is closed; and is configured to output an upper half square wave signal of the square wave signal after the zero-crossing processing when the second switch is closed; A voltage raising circuit, connected to the selection output circuit, for raising the lower half square wave signal or the upper half square wave signal to above zero; A comparison circuit, wherein the input end of the comparison circuit is connected to the voltage lifting circuit, and the output end of the comparison circuit is connected to the second control chip. The comparison circuit is used to compare the lower half-wave square wave signal after the lifting process or the upper half-wave square wave signal after the lifting process with the reference signal to obtain a comparison result; the second control chip is also used to output a drive signal corresponding to the comparison result.

2. The ultrasonic scalpel system with gear adjustment function according to claim 1, characterized in that: The ultrasonic knife system also includes a MOS tube; The gate of the MOS transistor is connected to the second control chip, the drain of the MOS transistor is connected to an external power supply after being connected in series with a resistor, and the source of the MOS transistor is grounded; the drain of the MOS transistor is also connected to the first control chip; the MOS transistor is used to transmit the data signal generated by the second control chip to the first control chip.

3. The ultrasonic scalpel system with gear adjustment function according to claim 1, characterized in that: The ultrasonic scalpel system also includes: a power amplifier circuit, connected to the second control chip, and configured to amplify the driving signal; an ultrasonic output matching circuit, connected to the power amplifier circuit, for performing output matching on the amplified drive signal; The transducer assembly is connected to the ultrasonic output matching circuit and is used to convert the output matched driving signal into mechanical vibration and drive the ultrasonic blade.

4. The ultrasonic scalpel system with gear adjustment function according to claim 2, characterized in that: The selection output circuit includes a first resistor, a second resistor, and a bidirectional diode; One end of the first resistor is grounded, and the other end of the first resistor is connected to the input end of the upper half of the bidirectional diode and the output end of the lower half of the bidirectional diode; One end of the second resistor is connected to the drain of the MOS transistor, the other end of the second resistor is connected to the first control chip, and the other end of the second resistor is also connected to one end of the first switch and one end of the second switch; The output end of the upper half of the bidirectional diode is connected to the other end of the second switch, and the input end of the lower half of the bidirectional diode is connected to the other end of the first switch.

5. The ultrasonic scalpel system with gear adjustment function according to claim 4, characterized in that: The zero-crossing processing circuit includes a third resistor and a first capacitor; one end of the first capacitor is connected to the second control chip, the other end of the first capacitor is connected to one end of the third resistor, the other end of the third resistor is connected to one end of the second resistor, and the other end of the third resistor is also connected to the voltage lifting circuit through an RC filtering circuit.

6. The ultrasonic scalpel system with gear adjustment function according to claim 5, characterized in that: The RC filter circuit includes a fourth resistor and a second capacitor, one end of the second capacitor is connected to the other end of the third resistor, the other end of the second capacitor is connected to one end of the fourth resistor, and the other end of the fourth resistor is connected to the voltage lifting circuit.

7. The ultrasonic scalpel system with gear adjustment function according to claim 6, characterized in that: The voltage lifting circuit includes a fifth resistor and a sixth resistor, one end of the fifth resistor is connected to an external power supply, one end of the sixth resistor is grounded, the other end of the fifth resistor and the other end of the sixth resistor are connected to the other end of the fourth resistor, and the other end of the fifth resistor and the other end of the sixth resistor are also connected to the comparison circuit.

8. The ultrasonic scalpel system with gear adjustment function according to claim 7, characterized in that: The comparison circuit includes a first comparator, a second comparator, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a thirteenth resistor; The inverting input terminal of the first comparator and the non-inverting input terminal of the second comparator are connected to the other end of the fifth resistor and the other end of the sixth resistor, one end of the seventh resistor is connected to the non-inverting input terminal of the first comparator, and the other end of the seventh resistor is externally connected to a reference signal, one end of the eighth resistor is connected to the inverting input terminal of the second comparator, and the other end of the eighth resistor is grounded, one end of the ninth resistor is connected to one end of the seventh resistor, and the other end of the ninth resistor is connected to one end of the eighth resistor; the output terminal of the first comparator is connected in series with the tenth resistor and then connected to the input port of the second control chip, and the output terminal of the second comparator is connected in series with the eleventh resistor and then connected to the input port of the first control chip; one end of the twelfth resistor is connected to the output terminal of the first comparator, and the other end of the twelfth resistor is connected to a power supply; one end of the thirteenth resistor is connected to the output terminal of the second comparator, and the other end of the thirteenth resistor is connected to a power supply.

9. The ultrasonic scalpel system with gear adjustment function according to claim 4, characterized in that: The ultrasonic knife system also includes a diode and a third capacitor for powering the first control chip. One end of the third capacitor is connected to the power input end of the first control chip, the other end of the third capacitor is connected to the other end of the first resistor and the ground end of the first control chip, the anode of the diode is connected to the other end of the second resistor, and the cathode of the diode is connected to one end of the third capacitor.

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