High frequency surgical system with relay self-checking function

Abstract

The present disclosure discloses a high-frequency surgical system with relay self-checking function, which comprises a power supply control unit for generating a high-frequency signal, a power amplification unit for receiving the high-frequency signal and transmitting it to a surgical electrode, at least three channel units, and a control unit. Each channel unit comprises a high-voltage relay and a current detection circuit connected in sequence, and the high-voltage relay is connected between the power amplification unit and the surgical electrode; the control unit is used for controlling the working state of each high-voltage relay and determining whether the high-voltage relay is working abnormally. In the case that the high-voltage relays of any two channel units among the at least three channel units are turned on and connected with the surgical electrode to form a current loop, the working state of the high-voltage relay of the current channel unit in the open circuit state is detected. The disclosed high-frequency surgical system can timely detect whether the relay therein fails during operation.

Description

Technical Field

[0001] This disclosure pertains to the field of medical technology, and in particular relates to a high-frequency surgical system with relay self-testing function. Background Technology

[0002] A high-frequency electrosurgical unit is an electrosurgical instrument that replaces a mechanical scalpel for tissue cutting. It heats tissues by generating a high-frequency, high-voltage current at the tip of an effective surgical electrode, thereby separating and coagulating the tissues to achieve the purpose of cutting and hemostasis.

[0003] High-frequency electrosurgical units require a high-frequency power amplification system for power supply, i.e., a high-frequency surgical system. After production, the high-frequency surgical system undergoes aging tests to verify its stability. For example, the high-frequency surgical system should operate continuously for 48 hours without any problems.

[0004] Multi-channel outputs in high-frequency electrosurgical products often share a common high-frequency power source, with energy output channels selected by switching between high-voltage relays. In existing technology, the high-voltage relay function relies solely on factory performance testing after production, and there is no detection function for relay failure during actual product use, which could potentially lead to high-frequency current leakage and injury. Summary of the Invention

[0005] To address the aforementioned issues, the first aspect of this disclosure proposes a high-frequency surgical system with relay self-testing function, comprising:

[0006] The power control unit is used to generate high-frequency signals;

[0007] A power amplification unit is used to receive the high-frequency signal and transmit it to the surgical electrode;

[0008] The high-frequency surgical system also includes:

[0009] At least three channel units, each channel unit including a high-voltage relay and a current detection circuit connected in sequence, the high-voltage relay being connected between the power amplification unit and the surgical electrode; and

[0010] A control unit is connected to the control terminal of each of the high-voltage relays and the output terminal of each of the current detection circuits, and is used to control the operating state of each of the high-voltage relays and determine whether the high-voltage relays are malfunctioning.

[0011] Specifically, when the high-voltage relays of any two of the at least three channel units are turned on and connected to the surgical electrode to form a current loop, the operating status of the high-voltage relay of the current channel unit is detected, wherein the current channel unit is in an open-circuit state.

[0012] According to an exemplary embodiment of the present invention, detecting the operating state of the high-voltage relay of the current channel unit includes:

[0013] If the current detection circuit corresponding to any high-voltage relay currently in an open circuit state detects a first current signal in the current channel unit, and the control unit detects that the first current signal is greater than or equal to a first threshold, then the high-voltage relay of the current channel unit is determined to be malfunctioning.

[0014] According to an exemplary embodiment of the present invention, each channel unit further includes: a capacitance detection circuit connected in parallel with the high-voltage relay to the channel unit, the capacitance detection circuit being used to detect the loop capacitance of the channel unit;

[0015] The control unit is also used for:

[0016] Obtain the first loop capacitance of any channel unit when the high voltage relay is turned on, and obtain the second loop capacitance of the channel unit when the high voltage relay is turned off;

[0017] The operating status of the high-voltage relay of the channel unit is detected based on the first circuit capacitor and the second circuit capacitor.

[0018] According to an exemplary embodiment of the present invention, detecting the operating state of the high-voltage relay of the channel unit based on the first loop capacitor and the second loop capacitor includes:

[0019] When the capacitance value of the first circuit capacitor is less than the capacitance value of the second circuit capacitor, the control unit determines that the high-voltage relay is abnormal.

[0020] According to an exemplary embodiment of the present invention, the current detection circuit includes:

[0021] A current transformer, the input of which is connected to the output of the high-voltage relay;

[0022] A rectifier and filter module is connected to the output terminal of the current transformer; and

[0023] The first amplification module is connected to the output terminal of the rectifier and filter module and the control unit;

[0024] The output current of the high-voltage relay is sampled by the current transformer and then processed by the rectifier and filter module to obtain the average current value within the first detection time. The average current value is then processed by the first amplification module and input to the control unit, which determines whether the average current value is equal to or greater than the first threshold.

[0025] According to an exemplary embodiment of the present invention, the current detection circuit includes:

[0026] The first resistor is connected to the output terminal of the high-voltage relay;

[0027] The sampling module is connected to the output terminal of the first resistor; and

[0028] The second amplification module is connected to the output of the sampling module and the control unit;

[0029] The output current of the high-voltage relay is passed through the first resistor to form a test signal. The test signal is processed by the sampling module to obtain the current peak value within the second detection time. The current peak value is processed by the second amplification module and then input to the control unit. The control unit determines whether the current peak value is equal to or greater than the first threshold.

[0030] According to an exemplary embodiment of the present invention, the capacitance detection circuit includes:

[0031] A bridge oscillation circuit is connected between the output terminal of the high-voltage relay and the control unit.

[0032] The output signal of the high-voltage relay is processed by the bridge oscillation circuit and then input to the control unit. The bridge oscillation circuit outputs a first output frequency value when the high-voltage relay is turned on and a second output frequency value when the high-voltage relay is turned off. The first output frequency value represents the capacitance value of the first circuit capacitor, and the second output frequency value represents the capacitance value of the second circuit capacitor.

[0033] According to an exemplary embodiment of the present invention, the first loop capacitor includes the sum of the output DC blocking capacitor and coupling capacitor of the channel unit and the parasitic capacitance of the high-voltage relay in the on-state; and

[0034] The second circuit capacitor includes the sum of the output DC blocking capacitor, the coupling capacitor, and the parasitic capacitance of the high-voltage relay in the open-circuit state.

[0035] According to an exemplary embodiment of the present invention, the output DC blocking capacitor and the coupling capacitor remain unchanged as the high voltage relay is turned on and off.

[0036] The second aspect of this disclosure proposes a high-frequency surgical system with relay self-testing function, comprising:

[0037] The power control unit is used to generate high-frequency signals;

[0038] A power amplification unit is used to receive the high-frequency signal and transmit it to the surgical electrode;

[0039] The high-frequency surgical system also includes:

[0040] The channel unit is connected to the surgical electrode and includes a high-voltage relay and a capacitance detection circuit. The high-voltage relay is connected between the power amplifier unit and the surgical electrode, and the capacitance detection circuit is connected in parallel with the high-voltage relay to the channel unit.

[0041] The control unit is connected to the control terminal of the high-voltage relay and the output terminal of the capacitance detection circuit, and is used to control the working state of the high-voltage relay and determine whether the high-voltage relay is malfunctioning.

[0042] The capacitance detection circuit is used to detect the capacitance value of the first circuit capacitor of the channel unit when the high-voltage relay connected to it is turned on and the capacitance value of the second circuit capacitor of the channel unit when the high-voltage relay is turned off. The control unit uses the capacitance values ​​of the first circuit capacitor and the second circuit capacitor to detect the high-voltage relay.

[0043] According to an exemplary embodiment of the present invention, the control unit further includes detecting the high-voltage relay using the capacitance values ​​of the first circuit capacitor and the second circuit capacitor:

[0044] When the control unit detects that the capacitance value of the first circuit capacitor is less than the capacitance value of the second circuit capacitor, it determines that the high-voltage relay is abnormal.

[0045] According to an exemplary embodiment of the present invention, the capacitance detection circuit includes:

[0046] A bridge oscillation circuit is connected between the output terminal of the high-voltage relay and the control unit.

[0047] The output signal of the high-voltage relay is processed by the bridge oscillation circuit and then input to the control unit. The bridge oscillation circuit outputs a first output frequency value when the high-voltage relay is turned on and a second output frequency value when the high-voltage relay is turned off. The first output frequency value represents the capacitance value of the first circuit capacitor, and the second output frequency value represents the capacitance value of the second circuit capacitor.

[0048] According to an exemplary embodiment of the present invention, the first loop capacitor includes the sum of the output DC blocking capacitor and coupling capacitor of the channel unit and the parasitic capacitance of the high-voltage relay in the on-state; and

[0049] The second circuit capacitor includes the sum of the output DC blocking capacitor, the coupling capacitor, and the parasitic capacitance of the high-voltage relay in the open-circuit state.

[0050] According to an exemplary embodiment of the present invention, the output DC blocking capacitor and the coupling capacitor remain unchanged as the high voltage relay is turned on and off.

[0051] The high-frequency surgical system with relay self-testing function disclosed herein can utilize a current detection circuit to detect the relay current in the non-operating state to achieve relay function self-testing, and / or can utilize a capacitance detection circuit to detect the parasitic capacitance of the relay to achieve relay function self-testing. The disclosed high-frequency surgical system with relay self-testing function can effectively prevent various relay failure scenarios, such as contact sticking, jamming, and gas leakage in vacuum tube relays. Attached Figure Description

[0052] Features, advantages, and other aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description, in which several embodiments of the disclosure are illustrated by way of example and not limitation, in the drawings:

[0053] Figure 1 A block diagram of a first example of a high-frequency surgical system with relay self-testing function based on the present disclosure;

[0054] Figure 2 A block diagram of a second example of a high-frequency surgical system with relay self-testing function based on the present disclosure;

[0055] Figure 3 A block diagram of a third example of a high-frequency surgical system with relay self-testing function based on this disclosure; and

[0056] Figure 4 A first exemplary circuit diagram for a current detection circuit used in a high-frequency surgical system with relay self-testing function according to the present disclosure;

[0057] Figure 5 A second exemplary circuit diagram for a current detection circuit used in a high-frequency surgical system with relay self-testing function according to this disclosure; and

[0058] Figure 6 This is an exemplary circuit diagram of a capacitance detection circuit for a high-frequency surgical system with relay self-testing function according to the present disclosure. Detailed Implementation

[0059] The following detailed description of various exemplary embodiments of the present disclosure is based on the accompanying drawings. The flowcharts and block diagrams in the drawings illustrate the architecture, functionality, and operation of possible implementations of methods and systems according to various embodiments of the present disclosure. It should be noted that each block in a flowchart or block diagram may represent a module, segment, or portion of code, which may include one or more executable instructions for implementing the logical functions specified in the various embodiments. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutively represented blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a flowchart and / or block diagram, and combinations of blocks in flowcharts and / or block diagrams, may be implemented using a dedicated hardware-based system that performs the specified functions or operations, or using a combination of dedicated hardware and computer instructions.

[0060] The terms “comprising,” “including,” and similar terms used herein should be understood as open-ended terms, meaning “including / including but not limited to,” implying that other content may also be included. The term “based on” means “at least partially based on.” The term “one embodiment” means “at least one embodiment”; the term “another embodiment” means “at least one additional embodiment,” and so on.

[0061] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. The lines connecting the units in the accompanying drawings are merely for illustrative purposes, indicating that at least the units at both ends of the line are communicating with each other, and are not intended to prevent unconnected units from communicating.

[0062] This invention primarily addresses the following technical issue: how to implement the relay self-test function in a high-frequency surgical system.

[0063] To address the aforementioned problems, this invention discloses a high-frequency surgical system with relay self-testing functionality, comprising: a power control unit for generating high-frequency signals, a power amplification unit for receiving the high-frequency signals and transmitting them to surgical electrodes, at least three channel units, and a control unit. Each channel unit includes a high-voltage relay and a current detection circuit connected in sequence, the high-voltage relay being connected between the power amplification unit and the surgical electrodes; the control unit is used to control the operating state of each high-voltage relay and determine whether the high-voltage relay is malfunctioning. When the high-voltage relays of any two of the at least three channel units are conducting and connected to the surgical electrodes to form a current loop, the operating state of the high-voltage relay in the current channel unit, which is in an open-circuit state, is detected.

[0064] Example 1

[0065] Figure 1 This embodiment illustrates a high-frequency surgical system with relay self-testing function, comprising: a power control unit 10, a power amplification unit T1, a control unit 20, a sensor 30 for sensing circuit status, a first channel unit, a second channel unit, and a third channel unit. The first channel unit includes a high-voltage relay K1 and a current detection circuit 41 connected in sequence; the second channel unit includes a high-voltage relay K2 and a current detection circuit 51 connected in sequence; and the third channel unit includes a high-voltage relay K3 and a current detection circuit 61 connected in sequence. Specifically, the power amplification unit T1 receives high-frequency signals and transmits them to multiple electrode interfaces for surgical electrodes. The high-voltage relay K1 is connected between the power amplification unit T1 and the electrode interface for surgical electrode 42; the high-voltage relay K2 is connected between the power amplification unit T1 and the electrode interface for surgical electrode 52; and the high-voltage relay K3 is connected between the power amplification unit T1 and the electrode interface for surgical electrode 62.

[0066] like Figure 1 As shown, the control unit 20 is connected to the high-voltage relays K1, K2 and K3 respectively, and is electrically connected to the current detection circuits 41, 51 and 61.

[0067] In this example, the control unit 20 is used to control the circuit connection or disconnection of high-voltage relays K1, K2 and K3, and to determine whether high-voltage relays K1, K2 and K3 are malfunctioning.

[0068] There are various methods for detecting the current of a high-voltage relay, such as detecting the average value, effective value, and peak value of the current passing through the high-voltage relay. In this example, the average value of the current is used to detect the current of the high-voltage relay.

[0069] Specifically, the current detection circuit is as follows: Figure 4 As shown, it includes: a current transformer T3, a rectifier and filter module 411, and a first amplifier module 412 connected in sequence. Specifically, the rectifier and filter module 411 includes a rectifier bridge BR, capacitors C5 and C6 for filtering, and a resistor R7. The first amplifier module 412 includes an operational amplifier U3 and resistors R5 and R6 connected to the operational amplifier U3.

[0070] In practical applications, the input terminals A and C of the current transformer T3 sample the current of the high-voltage relay (e.g., high-voltage relay K1) connected to it. The signal output from the output terminal of the current transformer T3 is rectified by the rectifier bridge BR in the rectifier and filter module 411 and then filtered by the capacitors C5 and C6 and the resistor R7 to obtain the average current flowing through the high-voltage relay K1 within the first detection time t1. Then, the average current is processed by the first amplification module 412 and output to the control unit.

[0071] Furthermore, in this example, the surgical electrode 42 connected to the first channel unit is a high-frequency surgical instrument single stage 1, and the surgical electrode 52 connected to the second channel unit is a high-frequency surgical instrument single stage 2. Therefore, both the surgical electrode 42 and the surgical electrode 52 have only one load electrode, so they need to be paired with a separate neutral electrode to form a circuit. Therefore, the surgical electrode 62 connected to the third channel unit is a neutral electrode.

[0072] In other words, when there are at least three channel units, the first channel unit and the third channel unit need to be turned on simultaneously or the second channel unit and the third channel unit need to be turned on simultaneously to form a circuit to ensure that a pair of surgical electrodes (e.g., surgical electrode 42 and surgical electrode 62 or surgical electrode 52 and surgical electrode 62) can work normally.

[0073] Therefore, the high-frequency surgical system with relay self-testing function disclosed in this example may include multiple first-type channel units that are unilevel connected to high-frequency surgical instruments and multiple second-type channel units that are connected to a neutral electrode, such that the high-voltage relay in each of all first-type channel units and all second-type channel units can be self-tested.

[0074] The specific working principle of the high-frequency surgical system with relay self-test function disclosed in this example is as follows:

[0075] When the control unit 20 simultaneously turns on the high-voltage relay K1 in the first channel unit and the high-voltage relay K3 in the third channel unit, the first channel unit, surgical electrode 42, third channel unit, and surgical electrode 62 form a current loop. Simultaneously, the control unit 20 turns off the high-voltage relay K2 in the second channel unit, causing the current detection circuit 51 to detect the current flowing through the high-voltage relay K2 and output the average current value within the first detection time t1, which is then input to the control unit 20.

[0076] The control unit 20 compares the average current value with a first threshold stored therein. When the control unit 20 detects that the first current signal (i.e., the average current value within the first detection time t1) is greater than or equal to the first threshold, it determines that the high-voltage relay K2 of the second channel unit is malfunctioning.

[0077] For example, if the control unit 20 determines that the average current value tends to 0, it determines that the high-voltage relay K2 of the second channel unit is working normally; otherwise, the high-voltage relay K2 of the second channel unit is in an abnormal working state.

[0078] Similarly, the current detection circuit 41 and control unit 20 of the first channel can be used to detect the high-voltage relay K1 in the first channel unit.

[0079] Furthermore, when the high-frequency surgical system includes multiple second-type channel units (e.g., third-type channel units) connected to a neutral electrode, the above-described working principle can be used to detect the high-voltage relays in the multiple second-type channel units.

[0080] The high-frequency surgical system with relay self-test function proposed in this invention can detect the function of the relays in the high-frequency surgical system under normal working conditions, so as to determine whether the relays have problems such as contact sticking or jamming, thereby avoiding high-frequency current leakage and even injury to users or patients, and improving the safety and reliability of the high-frequency surgical system.

[0081] Example 2

[0082] Figure 2This embodiment illustrates a high-frequency surgical system with relay self-testing function, comprising: a power control unit 10, a power amplification unit T1, a control unit 20, a sensor 30 for sensing circuit status, a first channel unit, a second channel unit, and a third channel unit. The first channel unit includes a high-voltage relay K1 and a capacitance detection circuit 43; the second channel unit includes a high-voltage relay K2 and a capacitance detection circuit 53; and the third channel unit includes a high-voltage relay K3 and a capacitance detection circuit 63. Specifically, the high-voltage relay K1 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 42; the capacitance detection circuit 43 is connected in parallel with the high-voltage relay K1 to the first channel unit; the high-voltage relay K2 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 52; the capacitance detection circuit 53 is connected in parallel with the high-voltage relay K2 to the second channel unit; and the high-voltage relay K3 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 62; the capacitance detection circuit 63 is connected in parallel with the high-voltage relay K3 to the third channel unit.

[0083] In this example, the control unit 20 is connected to the high-voltage relays K1, K2 and K3 respectively, and is electrically connected to the capacitance detection circuits 43, 53 and 63 (not shown in the figure).

[0084] In this example, the control unit 20 is used to control the circuit connection or disconnection of high-voltage relays K1, K2 and K3, and to determine whether high-voltage relays K1, K2 and K3 are malfunctioning.

[0085] In this example, the first loop capacitance includes the sum of the output DC blocking capacitance (e.g., Co1, Co2, and Co3) and coupling capacitance (Ciso1, Ciso2, and Ciso3) of the channel unit, as well as the parasitic capacitance of the high-voltage relay in the on-state (e.g., Cs1, Cs2, and Cs3). The second loop capacitance includes the sum of the output DC blocking capacitance, the coupling capacitance, and the parasitic capacitance of the high-voltage relay in the off-state. In a high-frequency surgical system, the output DC blocking capacitance (e.g., Co1, Co2, and Co3) and coupling capacitance (Ciso1, Ciso2, and Ciso3) of each channel unit remain unchanged as the high-voltage relay of that channel unit is switched on and off.

[0086] Utilizing the characteristics of the circuit capacitance described above, this example considers detecting the circuit capacitance to determine whether the high-voltage relay is malfunctioning.

[0087] In this example, the bridge oscillation circuit is used to detect the capacitance value of the first loop capacitor of the channel unit when the high-voltage relay is turned on, and the capacitance value of the second loop capacitor of the channel unit when the high-voltage relay is turned off. There are various methods for detecting the capacitance of the high-voltage relay, such as detecting the frequency of the signal flowing through the high-voltage relay to detect the parasitic capacitance of the high-voltage relay itself, thereby realizing the detection of the high-voltage relay.

[0088] Specifically, the capacitance detection circuit is a bridge oscillator circuit, such as... Figure 6 As shown, in this example, the capacitance detection circuit is preferably a Wien bridge oscillator circuit. This Wien bridge oscillator circuit is connected between the high-voltage relay and the control unit 20. The Wien bridge oscillator circuit includes an input terminal A, a coupling capacitor C1 for detecting the path input, an operational amplifier U1, etc.; by changing the capacitance values ​​of capacitors C1, C2, and C3 and the resistance values ​​of resistors R3 and R6 in this circuit, the output frequency value is obtained from the output terminal B.

[0089] The Wien bridge oscillation circuit receives the output signal from the high-voltage relay, processes it, and inputs it to the control unit 20. The Wien bridge oscillation circuit outputs a first output frequency value when the high-voltage relay (e.g., high-voltage relay K1) is turned on, and outputs a second output frequency value when the high-voltage relay K1 is turned off.

[0090] In this example, the first output frequency value represents the capacitance value of the first loop capacitor, and the second output frequency value represents the capacitance value of the second loop capacitor.

[0091] The specific working principle of the high-frequency surgical system with relay self-test function disclosed in this example is as follows:

[0092] When the control unit 20 controls the high-voltage relay K1 in the first channel unit to be turned on, the capacitance detection circuit 43 obtains a first output frequency value that characterizes the capacitance value of the first loop capacitor of the first channel unit, and inputs the first output frequency value to the control unit 20.

[0093] Then, when the control unit 20 controls the high-voltage relay K1 in the first channel unit to be disconnected, the capacitance detection circuit 43 obtains a second output frequency value that characterizes the capacitance value of the second loop capacitor of the first channel unit, and inputs the second output frequency value to the control unit 20.

[0094] When the control unit 20 detects the difference between the first output frequency value and the second output frequency value, it determines that the high-voltage relay K1 of the first channel unit is malfunctioning.

[0095] Similarly, the capacitance detection circuit 53 and control unit 20 of the second channel unit can be used to detect the high-voltage relay K2 in the second channel unit. The capacitance detection circuit 63 and control unit 20 of the third channel unit can be used to detect the high-voltage relay K3 in the third channel unit.

[0096] Compared to Example 1, the high-frequency surgical system with relay self-testing function proposed in this example can flexibly detect the high-voltage relay in each channel unit by using the capacitance detection circuit set in each channel unit without needing to utilize the working status of multiple channel units, so as to determine whether the high-voltage relay is malfunctioning by means of the control unit.

[0097] Example 3

[0098] Figure 3 This embodiment illustrates a high-frequency surgical system with relay self-testing function, comprising: a power control unit (not shown), a power amplification unit T1, a control unit 20, a first channel unit, a second channel unit, and a third channel unit. The first channel unit includes a high-voltage relay K1, a current detection circuit 41, and a capacitance detection circuit 43; the second channel unit includes a high-voltage relay K2, a current detection circuit 51, and a capacitance detection circuit 53; and the third channel unit includes a high-voltage relay K3, a current detection circuit 61, and a capacitance detection circuit 63. Specifically, the high-voltage relay K1 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 42; the high-voltage relay K2 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 52; and the high-voltage relay K3 is connected between the power amplification unit T1 and the electrode interface for the surgical electrode 62.

[0099] The control unit 20 disclosed in this example works in a similar manner to the control unit 20 in Example 1 and Example 2, and will not be described again here.

[0100] In this example, both current detection circuit and voltage detection circuit can be used to detect the high-voltage relay. The principle of the high-frequency surgical system disclosed in this example is similar to the combination of Example 1 and Example 2, and will not be repeated here.

[0101] Furthermore, in this example, different detection methods can be flexibly used for different channel units to detect the high-voltage relays in each channel unit. For example, a current detection circuit can be used to detect the high-voltage relays in the first and second channel units, and a capacitor can be used to detect the current to detect the high-voltage relays in the third channel unit.

[0102] Similar to Example 1, this example can design a current detection circuit by detecting the average value, effective value, peak value, etc. of the current passing through the high-voltage relay, so as to realize a detection method for the high-voltage relay.

[0103] like Figure 5 As shown, the current detection circuit disclosed in this example includes a first resistor R13, a sampling module 511, and a second amplification module 512. This current detection circuit uses a resistor to sample the current and utilizes the peak value of the output current to detect the current flowing through the high-voltage relay connected to it.

[0104] Specifically, the first resistor R13 is connected to the output terminal of a high-voltage relay (e.g., high-voltage relay K2) to obtain the output signal of high-voltage relay K2. The sampling module includes an operational amplifier U2 for amplifying the signal, resistors R4 and R12, and diodes D1, capacitors C5 and C6, and resistors R1 and R7 for obtaining the current peak value. The second amplification module 512 is connected to the output terminal of the sampling module 511 and the control unit 20. The second amplification module 512 includes an operational amplifier U3 and resistors R5 and R6.

[0105] After the first resistor R13 acquires the output signal of the high-voltage relay K2, the sampling module amplifies the output signal and obtains the current peak value of the output signal within the second detection time t2. Then, the second amplification module 512 amplifies the current peak value and inputs it to the control unit 20. The control unit 2 compares the current peak value with the first threshold value to determine whether the high-voltage relay K2 is malfunctioning.

[0106] The high-frequency surgical system with relay self-testing function disclosed in this example can simultaneously perform current detection and capacitance detection on the high-voltage relays in the channel unit, thereby improving the detection accuracy and flexibility of the high-voltage relays. This allows users to promptly detect whether the high-frequency surgical system has high-frequency current leakage problems caused by relay contact sticking, jamming, or gas leakage in vacuum tube relays, thus improving the safety and reliability of the high-frequency surgical system.

[0107] It should be noted that although several devices or sub-devices of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more devices described above can be embodied in one device. Conversely, the features and functions of one device described above can be further divided and embodied by multiple devices.

[0108] The above descriptions are merely optional embodiments of this disclosure and are not intended to limit the embodiments of this disclosure. For those skilled in the art, various modifications and variations can be made to the embodiments of this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this disclosure should be included within the protection scope of the embodiments of this disclosure.

[0109] While embodiments of this disclosure have been described with reference to several specific examples, it should be understood that the embodiments of this disclosure are not limited to the specific embodiments disclosed. The embodiments of this disclosure are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the appended claims is to be interpreted in the broadest possible sense, thereby encompassing all such modifications and equivalent structures and functions.

Claims

1. A high-frequency surgical system with relay self-testing function, characterized in that, include: The power control unit is used to generate high-frequency signals; A power amplification unit is used to receive the high-frequency signal and transmit it to the surgical electrode; The high-frequency surgical system also includes: At least three channel units, each channel unit including a high-voltage relay and a current detection circuit connected in sequence, the high-voltage relay being connected between the power amplification unit and the surgical electrode; and A control unit is connected to the control terminal of each of the high-voltage relays and the output terminal of each of the current detection circuits, and is used to control the operating state of each of the high-voltage relays and determine whether the high-voltage relays are malfunctioning. Wherein, when the high-voltage relays of any two of the at least three channel units are turned on and connected to the surgical electrode to form a current loop, the operating status of the high-voltage relay of the current channel unit is detected, wherein the current channel unit is in an open circuit state; Each of the channel units further includes: a capacitance detection circuit connected in parallel with the high-voltage relay to the channel unit, the capacitance detection circuit being used to detect the loop capacitance of the channel unit; The control unit is also used for: Obtain the first loop capacitance of any channel unit when the high voltage relay is turned on, and obtain the second loop capacitance of the channel unit when the high voltage relay is turned off; The operating status of the high-voltage relay of the channel unit is detected based on the first circuit capacitor and the second circuit capacitor.

2. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The detection of the operating status of the high-voltage relay in the current channel unit includes: If the current detection circuit corresponding to any high-voltage relay currently in an open circuit state detects a first current signal in the current channel unit, and the control unit detects that the first current signal is greater than or equal to a first threshold, then the high-voltage relay of the current channel unit is determined to be malfunctioning.

3. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The detection of the high-voltage relay operating status of the channel unit based on the first circuit capacitor and the second circuit capacitor includes: When the capacitance value of the first circuit capacitor is less than the capacitance value of the second circuit capacitor, the control unit determines that the high-voltage relay is abnormal.

4. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The current detection circuit includes: A current transformer, the input of which is connected to the output of the high-voltage relay; A rectifier and filter module is connected to the output terminal of the current transformer; and The first amplification module is connected to the output terminal of the rectifier and filter module and the control unit; The output current of the high-voltage relay is sampled by the current transformer and processed by the rectifier and filter module to obtain the average current value within the first detection time. The average current value is processed by the first amplification module and then input to the control unit, which determines whether the average current value is equal to or greater than a first threshold.

5. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The current detection circuit includes: The first resistor is connected to the output terminal of the high-voltage relay; The sampling module is connected to the output terminal of the first resistor; and The second amplification module is connected to the output of the sampling module and the control unit; The output current of the high-voltage relay is passed through the first resistor to form a test signal. The test signal is processed by the sampling module to obtain the current peak value within the second detection time. The current peak value is processed by the second amplification module and then input to the control unit. The control unit determines whether the current peak value is equal to or greater than the first threshold.

6. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The capacitance detection circuit includes: A bridge oscillation circuit is connected between the output terminal of the high-voltage relay and the control unit. The output signal of the high-voltage relay is processed by the bridge oscillation circuit and then input to the control unit. The bridge oscillation circuit outputs a first output frequency value when the high-voltage relay is turned on and a second output frequency value when the high-voltage relay is turned off. The first output frequency value represents the capacitance value of the first circuit capacitor, and the second output frequency value represents the capacitance value of the second circuit capacitor.

7. The high-frequency surgical system with relay self-test function according to claim 1, characterized in that, The first loop capacitor includes the sum of the output DC blocking capacitor and coupling capacitor of the channel unit, and the parasitic capacitance of the high-voltage relay in the on-state; and The second circuit capacitor includes the sum of the output DC blocking capacitor, the coupling capacitor, and the parasitic capacitance of the high-voltage relay in the open-circuit state.

8. The high-frequency surgical system with relay self-test function according to claim 7, characterized in that, The output DC blocking capacitor and the coupling capacitor remain unchanged as the high-voltage relay is turned on and off.

9. A high-frequency surgical system with relay self-testing function, characterized in that, include: The power control unit is used to generate high-frequency signals; A power amplification unit is used to receive the high-frequency signal and transmit it to the surgical electrode; The high-frequency surgical system also includes: The channel unit is connected to the surgical electrode and includes a high-voltage relay and a capacitance detection circuit. The high-voltage relay is connected between the power amplifier unit and the surgical electrode, and the capacitance detection circuit is connected in parallel with the high-voltage relay to the channel unit. The control unit is connected to the control terminal of the high-voltage relay and the output terminal of the capacitance detection circuit, and is used to control the working state of the high-voltage relay and determine whether the high-voltage relay is malfunctioning. The capacitance detection circuit is used to detect the capacitance value of the first circuit capacitor of the channel unit when the high-voltage relay connected to it is turned on and the capacitance value of the second circuit capacitor of the channel unit when the high-voltage relay is turned off. The control unit uses the capacitance values ​​of the first circuit capacitor and the second circuit capacitor to detect the high-voltage relay.

10. The high-frequency surgical system with relay self-test function according to claim 9, characterized in that, The control unit further includes detecting the high-voltage relay using the capacitance values ​​of the first circuit capacitor and the second circuit capacitor: When the control unit detects that the capacitance value of the first circuit capacitor is less than the capacitance value of the second circuit capacitor, it determines that the high-voltage relay is abnormal.

11. The high-frequency surgical system with relay self-test function according to claim 9, characterized in that, The capacitance detection circuit includes: A bridge oscillation circuit is connected between the output terminal of the high-voltage relay and the control unit. The output signal of the high-voltage relay is processed by the bridge oscillation circuit and then input to the control unit. The bridge oscillation circuit outputs a first output frequency value when the high-voltage relay is turned on and a second output frequency value when the high-voltage relay is turned off. The first output frequency value represents the capacitance value of the first circuit capacitor, and the second output frequency value represents the capacitance value of the second circuit capacitor.

12. The high-frequency surgical system with relay self-test function according to claim 9, characterized in that, The first loop capacitor includes the sum of the output DC blocking capacitor and coupling capacitor of the channel unit, and the parasitic capacitance of the high-voltage relay in the on-state; and The second circuit capacitor includes the sum of the output DC blocking capacitor, the coupling capacitor, and the parasitic capacitance of the high-voltage relay in the open-circuit state.

13. The high-frequency surgical system with relay self-test function according to claim 12, characterized in that, The output DC blocking capacitor and the coupling capacitor remain unchanged as the high-voltage relay is turned on and off.

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