Protection circuits and pulse ablation equipment

Abstract

This invention discloses a protection circuit and a pulse ablation device. The protection circuit includes a temperature acquisition board; the temperature acquisition board includes a temperature acquisition unit and a control unit. The temperature acquisition unit is electrically connected to the control unit; the temperature acquisition unit is used to acquire the temperature of the treatment electrode; the control unit is used to determine whether the temperature of the treatment electrode is abnormal, and generates a protection signal when the temperature of the treatment electrode is abnormal, to control the first power supply module and / or the second power supply module to stop supplying power. The first power supply module is used to supply power to the pulse generation module in the pulse ablation device, and the second power supply module is used to supply power to the relay module in the pulse ablation device. This invention improves the reliability of the protection circuit.

Description

Technical Field

[0001] This invention relates to the field of protection circuit technology, and in particular to a protection circuit and a pulse ablation device. Background Technology

[0002] For pulse ablation devices, in the event of an emergency during treatment involving the patient and / or the device, the device needs to be stopped immediately to protect the patient's safety.

[0003] Existing protection schemes typically send a stop command to the main control chip in the device controller via a human-machine interface or energy release button, allowing the main control chip to stop energy release. Alternatively, the main control chip receives voltage and current data, determines whether an anomaly has occurred, and stops energy release if an anomaly is detected. However, both the detection of an anomaly and the response by the operator require time, resulting in a significant delay between the anomaly's occurrence and the device's shutdown. Furthermore, electrical parameters such as voltage and current cannot fully reflect the contact state between the treatment electrode and the patient's tissues, making it impossible to determine whether tissue burns are caused by factors such as excessive energizing time even when the current does not exceed the rated threshold. Therefore, the reliability of existing electrical stimulation protection schemes is relatively low. Summary of the Invention

[0004] This invention provides a protection circuit and a pulse ablation device to improve the reliability of the protection circuit.

[0005] In a first aspect, embodiments of the present invention provide a protection circuit applied to a pulse ablation device, the pulse ablation device comprising: a pulse generation module, a relay, a treatment electrode, a first power supply module and a second power supply module, the pulse generation module being electrically connected to the treatment electrode through the relay module, the first power supply module being used to supply power to the pulse generation module, and the second power supply module being used to supply power to the relay module;

[0006] The protection circuit includes: a temperature acquisition board; the temperature acquisition board includes: a temperature acquisition unit and a control unit;

[0007] The temperature acquisition unit is electrically connected to the control unit; the temperature acquisition unit is used to acquire the temperature of the treatment electrode.

[0008] The control unit is used to determine whether the temperature of the treatment electrode is abnormal, and generates a protection signal when the temperature of the treatment electrode is abnormal, so as to control the first power module and / or the second power module to stop supplying power.

[0009] Optionally, the protection signal includes: a first control signal;

[0010] The temperature acquisition board further includes: a first protection unit; the control terminal of the first protection unit is electrically connected to the control unit and is used to receive the first control signal; a first terminal of the first protection unit is connected to a first potential signal, a second terminal of the first protection unit is connected to a second potential signal, and the output terminal of the first protection unit is electrically connected to the control terminal of the first power module and / or the control terminal of the second power module; the first protection unit is used to output the second potential signal as a first power-off control signal when the first control signal is received.

[0011] Optionally, the first protection unit includes: a first optocoupler and a first resistor;

[0012] The first end of the first optocoupler serves as the control end of the first protection unit, the second end of the first optocoupler is grounded, the third end of the first optocoupler serves as the output end of the first protection unit, and the fourth end of the first optocoupler serves as the second end of the first protection unit; the first end of the first resistor serves as the first end of the first protection unit, and the second end of the first resistor is electrically connected to the third end of the first optocoupler.

[0013] Optionally, the protection signal includes: a temperature anomaly signal;

[0014] The protection circuit also includes: a processor and a second protection unit;

[0015] The processor is electrically connected to the control unit, and the processor is used to generate a second control signal based on the temperature anomaly signal;

[0016] The control terminal of the second protection unit is electrically connected to the processor. The first terminal of the second protection unit is connected to a first potential signal, the second terminal of the second protection unit is connected to a second potential signal, and the output terminal of the second protection unit is electrically connected to the control terminal of the first power module and / or the control terminal of the second power module. The second protection unit is used to output the second potential signal as a second power-off control signal when the second control signal is connected.

[0017] Optionally, the second protection unit includes: a first transistor, a second optocoupler, and a second resistor;

[0018] The control terminal of the first transistor serves as the control terminal of the second protection unit, and the first terminal of the first transistor is grounded; the first terminal of the second optocoupler is connected to the first power signal, the second terminal of the second optocoupler is electrically connected to the second terminal of the first transistor, the third terminal of the second optocoupler serves as the first terminal of the second protection unit, and the fourth terminal of the second optocoupler serves as the output terminal of the second protection unit; the first terminal of the second resistor serves as the second terminal of the second protection unit, and the second terminal of the second resistor is electrically connected to the fourth terminal of the second optocoupler.

[0019] Optionally, the protection circuit further includes: an emergency triggering unit; the emergency triggering unit includes an emergency switch, the first end of the emergency switch is connected to the first power signal, and the second end of the emergency switch is electrically connected to the first end of the second optocoupler.

[0020] Optionally, the emergency triggering unit further includes: a third resistor and a fourth resistor;

[0021] The first end of the third resistor is electrically connected to the second end of the emergency switch, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the processor, and the second end of the fourth resistor is grounded.

[0022] Optionally, the protection circuit further includes: an electrical signal acquisition unit; the electrical signal acquisition unit is electrically connected to the processor; the electrical signal acquisition unit is used to acquire electrical signals on the treatment electrode, and the processor is also used to generate the second control signal when the electrical signal is abnormal.

[0023] Optionally, the protection circuit further includes: a host computer; the input / output interface of the host computer is electrically connected to at least one of the control unit, the control terminal of the first power module, and the control terminal of the second power module.

[0024] Secondly, embodiments of the present invention also provide a pulse ablation device, comprising: a pulse generation module, a relay, a treatment electrode, a first power supply module, a second power supply module, and a protection circuit as provided in any embodiment of the present invention.

[0025] The protection circuit provided in this embodiment of the invention includes a temperature acquisition board. The temperature acquisition unit collects the temperature of the treatment electrode in real time, enabling timely detection of abnormal temperature rises. The control unit then promptly stops supplying power to the first and / or second power modules, thereby cutting off the source and / or transmission path of the electrical stimulation pulses. This controls the treatment electrode to stop releasing energy to the patient, ensuring better timeliness of protection compared to manual control. Furthermore, in this embodiment, the control unit can directly determine the risk of burns to the patient from the pulse ablation device based on the temperature of the treatment electrode. This judgment is more intuitive and accurate than electrical parameters, allowing for timely power cut-off before burn symptoms appear, reducing harm caused by device malfunction. Therefore, compared to existing technologies, this embodiment of the invention improves the reliability of the protection circuit, ensuring the safety of the pulse ablation device.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a protection circuit provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of another protection circuit provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of another protection circuit provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a first protection unit provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram illustrating the connection relationship between a second protection unit, an emergency triggering unit, and a first power module according to an embodiment of the present invention.

[0033] Figure 6 This is a schematic diagram of the structure of a second power module provided in an embodiment of the present invention;

[0034] Figure 7This is a schematic diagram of the structure of a pulse ablation device provided in an embodiment of the present invention. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0037] This invention provides a protection circuit that can be applied to medical devices such as pulse ablation devices that treat patients using electrical stimulation, so as to promptly control the treatment electrodes to stop releasing energy in case of sudden conditions in the patient and / or medical device during treatment.

[0038] To better illustrate the operation of this protection circuit, the following will be combined with... Figure 1 First, a brief description of the structure and operation of the pulse ablation device will be given. For example, the pulse ablation device includes at least: a pulse generation module 50, a relay module 60, a treatment electrode 70, a first power supply module 30, and a second power supply module 40. The pulse generation module 50 is electrically connected to the treatment electrode 70 through the relay module 60. The first power supply module 30 supplies power to the pulse generation module 50, and the second power supply module 40 supplies power to the relay module 60.

[0039] The pulse ablation device may also include a main control chip. The working process of the pulse ablation device can be as follows: the main control chip controls the pulse generation module 50 to generate a high-voltage pulse signal according to the configuration parameters → the main control chip controls the relay module 60 to open → the treatment electrode 70 releases energy to the patient. The first power supply module 30 and the second power supply module 40 can both be power supplies that provide power to the control part (i.e., the low-voltage part) of the connected functional module.

[0040] Based on this, embodiments of the present invention provide a protection circuit that controls the therapeutic electrode 70 to stop releasing energy by cutting off the output of at least one power supply module. The protection circuit provided in the embodiments of the present invention will be described below.

[0041] See Figure 1 The protection circuit includes a temperature acquisition board 100; the temperature acquisition board 100 includes a temperature acquisition unit 110 and a control unit 120. The temperature acquisition unit 110 is electrically connected to the control unit 120. The temperature acquisition unit 110 is used to acquire the temperature of the treatment electrode 70. The control unit 120 is used to determine whether the temperature of the treatment electrode 70 is abnormal, and generates a protection signal when the temperature of the treatment electrode 70 is abnormal, so as to control the first power module 30 and / or the second power module 40 to stop supplying power.

[0042] The temperature acquisition unit 110 can be composed of temperature acquisition devices such as temperature sensors, including temperature acquisition probes made of resistance temperature detectors (RTDs) or thermocouples, or infrared temperature sensors. The temperature acquisition unit 110 transmits the acquired temperature to the control unit 120. Since electrical stimulation causes a thermal effect, excessively strong or prolonged stimulation may lead to excessive temperature rise and burns to human tissue. Therefore, by acquiring the temperature of the treatment electrode 70, the status information of the electrical stimulation can be obtained in real time and intuitively, enabling timely protection.

[0043] The control unit 120 is used to determine whether the treatment state is abnormal based on whether the temperature of the treatment electrode 70 is abnormal, and accordingly determines whether to generate a protection signal. For example, when the temperature of the treatment electrode 70 exceeds a preset temperature threshold, or the rate of temperature change exceeds a preset rate of change threshold, it can be determined that the temperature is abnormal and a risk to the treatment is anticipated; otherwise, it can be determined that the temperature is normal and the treatment state is normal. When the control unit 120 determines that the temperature is abnormal, it can generate a protection signal; this protection signal can be directly transmitted to the control terminal of the first power module 30 and / or the second power module 40, causing the power module receiving the protection signal to stop supplying power; or, the protection signal can be used to trigger the action of the protection unit connected to the power module, indirectly controlling the corresponding power module to stop supplying power through the protection unit. The specific control method is not limited here. When the control unit 120 determines that the temperature is normal, it can output a power supply enable signal to control the two power modules to continue supplying power normally. For example, the control unit 120 can be a microcontroller unit (MCU).

[0044] The protection circuit provided in this embodiment of the invention includes a temperature acquisition board 100. The temperature acquisition unit 110 collects the temperature of the treatment electrode in real time, enabling timely detection of abnormal temperature rise in the treatment electrode 70. The control unit 120 then promptly controls the first power module 30 and / or the second power module 40 to stop supplying power, thereby cutting off the source and / or transmission path of the electrical stimulation pulse, and controlling the treatment electrode 70 to stop releasing energy to the patient. This provides better timeliness of protection compared to manual control. Furthermore, in this embodiment, the control unit 120 can directly determine the risk of burns to the patient from the pulse ablation device based on the temperature of the treatment electrode 70. This judgment is more intuitive and accurate than electrical parameters, allowing for timely power cut-off before burn symptoms appear, reducing harm caused by device malfunction. Therefore, compared to existing technologies, this embodiment of the invention improves the reliability of the protection circuit, ensuring the safety of the pulse ablation device.

[0045] Figure 2 This is a schematic diagram of another protection circuit provided in an embodiment of the present invention. See also... Figure 2 Based on the above embodiments, optionally, the protection signal includes: a first control signal ESTOP_ARM. The temperature acquisition board 100 also includes: a first protection unit 130; the control terminal 13 of the first protection unit 130 is electrically connected to the control unit 120 and is used to receive the first control signal ESTOP_ARM; the first terminal 11 of the first protection unit 130 is connected to the first potential signal V1, the second terminal 12 of the first protection unit 130 is connected to the second potential signal V2, and the output terminal 14 of the first protection unit 130 is electrically connected to the control terminal of the first power module 30 and / or the control terminal of the second power module (here, the example of being electrically connected to the control terminal of the first power module 30 is shown).

[0046] The first protection unit 130 is used to control the conduction between its second terminal 12 and output terminal 14 when the first control signal ESTOP_ARM is received, and outputs the second potential signal V2 as the first power-off control signal to control the power module connected to it to stop supplying power. Additionally, the first protection unit 130 can control the conduction between its first terminal 11 and output terminal 14 when a power-on enable signal is received, and output the first potential signal V1 as the enable control signal to control the power module connected to it to start supplying power. Exemplarily, the first protection unit 130 can be composed of a transistor or optocoupler and other switching control devices and their peripheral circuitry. Exemplarily, the first potential signal V1 is used to control the power module to supply power normally, and this first potential signal V1 can be a high potential signal (or a potential signal that can be recognized as logic 1 by the control terminal of the corresponding power module); the second potential signal V2 is used to control the power module to stop supplying power, and this second potential signal V2 can be a low potential signal (or a potential signal that can be recognized as logic 0 by the control terminal of the corresponding power module).

[0047] The above embodiments provide a way for the control unit to control whether the power module supplies power to the outside, but are not intended to limit the present invention.

[0048] See also Figure 2 In another embodiment, optionally, the protection signal includes a temperature anomaly signal ES. The protection circuit also includes a processor 210 and a second protection unit 220. The processor 210 is electrically connected to the control unit 120. The control terminal 23 of the second protection unit 220 is electrically connected to the processor 210, the first terminal 21 of the second protection unit 220 is connected to a first potential signal V1, the second terminal 22 of the second protection unit 220 is connected to a second potential signal V2, and the output terminal 24 of the second protection unit 220 is electrically connected to the control terminal of the first power module 30 and / or the control terminal of the second power module (here, the example of being electrically connected to the control terminal of the first power module 30 is still used for illustration).

[0049] The processor 210 generates a second control signal PWR_EN_ARM based on the temperature anomaly signal ES. The second protection unit 220 outputs a second potential signal V2 as a second power-off control signal when the second control signal PWR_EN_ARM is received. For example, when the processor 210 does not receive the temperature anomaly signal ES, or when it receives a power-on enable signal transmitted by the control unit 120, it can control the first terminal 21 and the output terminal 24 of the second protection unit 220 to conduct, causing the second protection unit 220 to output a first potential signal V1 as an enable control signal to control the connected power module to start supplying power.

[0050] In this embodiment, the control unit 120 and the processor 210 communicate with each other. For example, the abnormal temperature signal can be the abnormal temperature itself. The processor 210 can use this temperature to further determine whether the treatment state is abnormal and accordingly decide whether to output the second control signal PWR_EN_ARM to prevent the second protection unit 220 from malfunctioning. Alternatively, the abnormal temperature signal can be the judgment result of the control unit 120. The processor 210 can directly parse this result and output the second control signal PWR_EN_ARM to ensure timely control. For example, the control unit 120 can also transmit the temperature of the treatment electrode 70 to the processor in real time. Both the control unit 120 and the processor 210 can make real-time judgments based on the collected temperature and react promptly when an abnormal temperature is detected. Furthermore, the processor 210 can also collect other parameters of the medical device during operation. When other parameters indicate an abnormality in the treatment process, the processor 210 can also react and output the second control signal PWR_EN_ARM. For example, the processor 210 can be the existing processor used to control the operation of the pulse ablation device to simplify the device structure. For example, the processor 210 may be a central processing unit (CPU), and the second protection unit 220 may be composed of switching control devices such as transistors or optocouplers and their peripheral circuits.

[0051] In another embodiment, optionally, the protection circuit can simultaneously configure a temperature control board 100, a processor 210, and a second protection unit 220 to achieve dual protection for the pulse ablation device. When the control unit 120 detects an abnormal temperature reading from the temperature acquisition unit 110, it can directly and quickly control the corresponding power module to stop supplying power via the first protection unit 130. Simultaneously, communication between the control unit 120 and the processor 210 establishes a connection between them. When an abnormal temperature occurs, the processor 210 can also react to the abnormality by controlling the corresponding power module to stop supplying power via the second protection unit 220. The signal transmission process via the first protection unit 130 is simpler and has better timeliness, enabling rapid power cut-off. The second protection unit 220 serves as an auxiliary protection for the first protection unit 220, ensuring that the output of the treatment electrode 70 can be cut off in case of an abnormality. Furthermore, the operation processes of the two protection units are relatively independent. If either protection unit fails, the other protection unit can perform corresponding protective actions based on its input control signal, effectively improving the reliability of the protection circuit. Preferably, the first protection unit 130 and the second protection unit 220 are both connected to the two power supply modules. In the event of an abnormality, the two power failure control signals can control both power supply modules to stop outputting, thus achieving dual protection.

[0052] Based on the above embodiments, optionally, the first potential signal V1 can be a DC voltage signal, such as 24V DC, and the second potential signal V2 can be a low-potential signal such as a power supply return ground signal or a common ground signal. Compared with digital level (TTL), the first potential signal V1 has a higher potential and a larger potential difference with the second potential signal V2, which has better anti-interference capability. When voltage fluctuations are caused by interference, they are less likely to be misidentified by the control terminal of the power module, thus ensuring the reliability of the protection circuit.

[0053] Based on the above embodiments, optionally, RS422 communication can be used between the control unit 120 and the processor 210 to enhance communication stability and minimize data transmission packet loss caused by interference.

[0054] Figure 3 This is a schematic diagram of another protection circuit provided in an embodiment of the present invention. See also... Figure 3 Based on the above embodiments, the protection circuit may optionally further include an emergency trigger unit 230. The second protection unit 220 also includes an emergency control terminal 25, and the first output terminal of the emergency trigger unit 230 is electrically connected to the emergency control terminal 25 of the second protection unit 220. The signals received by the control terminal 23 of the second protection unit 220 and the emergency control terminal 25 jointly determine the output state of the second protection unit 220. For example, when any power-off control signal is received by the control terminal 23 of the second protection unit 220, or when the emergency trigger unit 230 transmits a stop potential to the emergency control terminal 25, the connection between the second terminal 22 and the output terminal 24 of the second protection unit 220 can be controlled to stop the power supply to each power module. For example, a mechanical emergency switch may be provided in the emergency trigger unit 230 so that medical personnel can promptly shut down the equipment when an abnormality is detected.

[0055] Furthermore, the emergency trigger unit 230 may also include a second output terminal electrically connected to the processor 210. The second output terminal of the emergency trigger unit 230 can output an emergency switch status signal to inform the processor 210 of the current status of the emergency trigger unit 230, such as whether the emergency switch is pressed. The processor 210 can perform response processing based on the emergency switch status signal, such as outputting a second control signal. Therefore, this embodiment achieves dual protection based on the emergency trigger unit 230.

[0056] See also Figure 3Based on the above embodiments, optionally, the protection circuit further includes: an electrical signal acquisition unit 240; the electrical signal acquisition unit 240 is electrically connected to the processor 210. The electrical signal acquisition unit 240 is used to acquire electrical signals on the treatment electrode, such as the current flowing through the treatment electrode (i.e., the current flowing through the patient) or electrical parameters such as the potential on the treatment electrode. The processor 210 is also used to generate a second control signal when the electrical signal is abnormal. For example, the processor 210 can determine whether the electrical signal is abnormal based on whether the value or rate of change of the electrical signal exceeds a set threshold. In this embodiment, the processor 210 is also configured to generate a second control signal based on the electrical signal, so that the protection circuit can achieve more comprehensive protection.

[0057] See also Figure 3 Based on the above embodiments, the protection circuit may optionally include a host computer 90; the input / output interface of the host computer 90 may be electrically connected to at least one of the control unit 120, the processor 210, the control terminal 13 of the first protection unit 130, the control terminal 23 of the second protection unit 220, the control terminal of the first power module 30, and the control terminal of the second power module 40. Figure 3 The example shows the electrical connection between the input / output interface of the host computer 90 and the control terminal of the first power module 30. This configuration in this embodiment adds another layer of protection, allowing direct control of the first protection unit 130, the second protection unit 220, or various functional modules via the host computer 90. When the control unit 120 and / or the processor 210 malfunctions, or when the device experiences a fault that cannot be detected by the control unit 120 and the processor 210, the host computer 90 can quickly cut off the power to the device.

[0058] In addition, the host computer 90 can also be connected to the processor 210. Besides controlling the output state of the second protection unit 220, the processor 210 can also act as a controller in the pulse ablation device, controlling the operation of the device. Medical personnel can send work commands to the processor 210 through the host computer 90, causing the processor 210 to control the operation of the pulse generation module and select relay channels, etc., according to the work commands. For example, the host computer 90 may include a human-computer interaction module, such as a touchscreen, keyboard, buttons, and keypads.

[0059] Based on the above embodiments, optionally, the host computer 90 and the processor 210, as well as the processor 210 and the control unit 120, can perform handshake communication at very short intervals. Once the normally operating party fails to receive the handshake signal from the other party, a protection mechanism is triggered, and the control device stops working to avoid the safety risks caused by communication interruption or processor 210 crash.

[0060] In summary, the protection circuit provided in this embodiment of the invention can achieve multiple protections. Specifically, the protection process via control unit 120 - first protection unit 130 can serve as one layer of protection. The protection process via control unit 120 - processor 210 - second protection unit 220 can serve as another layer of protection. The protection process via the input / output interface of the host computer 90 can serve as yet another layer of protection. The protection process via emergency triggering unit 230 can serve as yet another layer of protection. With the above four layers of protection working together, the triggering of any one layer of protection can effectively control the power supply modules to stop supplying power, which can significantly improve the safety of the electrical stimulation medical device. In this embodiment of the invention, the four layers of protection are both independent and mutually influential. The independence is reflected in the fact that each protection mechanism has its own independent and complete control loop, and the conditions required for each protection scheme to trigger the protection mechanism are different, and different schemes can be performed independently. The mutual influence is reflected in the fact that if any one of the four schemes triggers the protection mechanism, it will cause the power supply modules to stop supplying power. At this time, the other protection mechanisms remain in a normal, inactive state and will not cause the power supply modules to resume supplying power.

[0061] The above embodiments exemplify the operation of each functional module in the protection circuit. The specific structure that each functional module may have is described below, but it is not intended to limit the present invention.

[0062] Figure 4 This is a schematic diagram of the structure of a first protection unit provided in an embodiment of the present invention. See also... Figure 4 In one embodiment, optionally, the first protection unit 130 includes: a first optocoupler U1 and a first resistor R1. The first end of the first optocoupler U1 serves as the control terminal of the first protection unit 130, connected to a first control signal ESTOP_ARM; the second end of the first optocoupler U1 is grounded, i.e., connected to the ground signal GND; the third end of the first optocoupler U1 serves as the output terminal of the first protection unit 130, used to output a first power-off control signal ESTOP_TSB; the fourth end of the first optocoupler U1 serves as the second terminal of the first protection unit 130, connected to a second potential signal V2; the first end of the first resistor R1 serves as the first terminal of the first protection unit 130, connected to the first potential signal V1; the second end of the first resistor R1 is electrically connected to the third end of the first optocoupler U1.

[0063] For example, the first potential signal V1 can be a DC voltage signal of 24VDC, and the second potential signal V2 can be the power supply return ground of 24V_RTN. Additionally, the first protection unit 130 may also include peripheral circuitry composed of resistors for current limiting and filtering, for example... Figure 3 The resistors R21 and R22 are in the middle.

[0064] For example, the control process of the first protection unit 130 can be as follows: when the control unit 120 determines that the temperature is abnormal, the control unit 120 quickly outputs a high-potential first control signal ESTOP_ARM, which turns on the emitter of the first optocoupler U1 and makes it emit light, thereby turning on the receiver of the first optocoupler U1. The second potential signal V2 is transmitted to the output terminal of the first protection unit 130 through the receiver of the first optocoupler U1 as a low-potential first power-off control signal ESTOP_TSB. This low potential can control the first power module 30 to have no output, thereby causing a series of circuits powered by the output of the first power module 30 to fail, and / or control the second power module 40 to have no output, thereby causing all channel relays in the relay module to disconnect, ensuring that the system cannot output high-voltage pulses.

[0065] In this embodiment, an optocoupler is used to form the first protection unit 130. In addition to realizing the switch control function, it can also play the role of electrical isolation and improve the safety of the equipment.

[0066] Figure 5 This is a schematic diagram illustrating the connection relationship between a second protection unit, an emergency triggering unit, and a first power module according to an embodiment of the present invention. (See also...) Figure 5 For example, the first power module 30 may be composed of a first power chip U3 and its peripheral circuitry. The first power chip U3 includes a control terminal Ctrl1, an input terminal Vin1, a ground terminal GND1, an output terminal Vo1, a zero-potential terminal V01, and an output adjustment terminal Trim1. The control terminal Ctrl1 of the first power chip U3 serves as the control terminal of the first power module 30, used to control the first power chip U3 to stop outputting power signals according to a first power-off control signal and / or a second power-off control signal. The peripheral circuitry of the first power chip U3 may be composed of components such as capacitors and inductors to achieve functions such as filtering protection and impedance matching. For example, the first power chip U3 can convert 24VDC to 3.3VDC or 5VDC output.

[0067] See also Figure 5In one embodiment, optionally, the second protection unit 220 includes: a first transistor Q1, a second optocoupler U1, and a second resistor R2. The control terminal of the first transistor Q1 serves as the control terminal of the second protection unit 220, connected to a second control signal PWR_EN_ARM; the first terminal of the first transistor Q1 is grounded; the first terminal of the second optocoupler U2 is connected to a first power supply signal VCC, the second terminal of the second optocoupler U2 is electrically connected to the second terminal of the first transistor Q1, the third terminal of the second optocoupler U2 serves as the first terminal of the second protection unit 220, connected to a first potential signal V1; the fourth terminal of the second optocoupler U2 serves as the output terminal of the second protection unit 220, used to output a second power-off control signal; the first terminal of the second resistor R2 serves as the second terminal of the second protection unit 220, connected to a second potential signal V2; the second terminal of the second resistor R2 is electrically connected to the fourth terminal of the second optocoupler U2.

[0068] For example, the first transistor Q1 can be an NMOS transistor, and the first power supply signal VCC can be a DC voltage signal +5VDC. In addition, the second protection unit 220 may also include peripheral circuits composed of resistors and capacitors for current limiting and filtering, such as a resistor connected to the gate and first terminal of the first transistor Q1, and a capacitor connected to the output terminal of the second protection unit 220.

[0069] For example, the control process of the second protection unit 220 can be as follows: When the control unit 120 detects a temperature abnormality, it outputs a first control signal and communicates with the processor 210 via RS422 to inform the processor 210 that a temperature abnormality has been detected and a protection mechanism needs to be triggered. The processor 210 outputs a low-potential second control signal PWR_EN_ARM to control the first transistor Q1 to turn off, causing the emitter of the second optocoupler U2 to turn off and stop emitting light, thereby turning off the receiver of the second optocoupler U2; the second potential signal V2 is transmitted to the output terminal of the second protection unit 220 through the second resistor R2 as a low-potential second power-off control signal output, controlling the first power module 30 and the second power module 40 to stop outputting.

[0070] For example, the signal derived from the second protection unit 220 can be denoted as the control signal ESTOP_OUT_EDB. When the first power-off control signal ESTOP_TSB and / or the second power-off control signal are present, the control signal ESTOP_OUT_EDB is at a low potential.

[0071] See also Figure 5Based on the above embodiments, optionally, the emergency triggering unit 230 includes an emergency switch K. The first end of the emergency switch K is connected to the first power signal VCC, and the second end of the emergency switch K is electrically connected to the first end of the second optocoupler U2. This configuration is equivalent to connecting the emergency switch K to the input path of the first end of the second optocoupler U2. When an emergency occurs, by disconnecting the emergency switch K, the transmission path of the first power signal VCC to the first end of the second optocoupler U2 can be disconnected, causing the emitting part of the second optocoupler U2 to turn off and stop emitting light. This causes the second protection unit 220 to output a second power-off control signal, controlling the first power module 30 and / or the second power module 40 to stop outputting, thereby realizing the emergency shutdown function.

[0072] For example, the emergency switch K can be connected to the circuit via connection interface P1, which includes pins 1, 2, and 3. The first terminal of the emergency switch K is connected to the first power signal VCC via pin 3 of connection interface P1, and the second terminal of the emergency switch K is electrically connected to the first terminal of the second optocoupler U2 via pin 1 of connection interface P1; pin 2 of connection interface P1 is unused. Additionally, the emergency triggering unit 230 may also include an external protection circuit composed of components such as resistors, inductors, and transient suppression diodes for current limiting, filtering, and overvoltage protection.

[0073] See also Figure 5 Based on the above embodiments, the emergency triggering unit 230 may optionally further include a third resistor R3 and a fourth resistor R4. The first end of the third resistor R3 is electrically connected to the second end of the emergency switch K; the second end of the third resistor R3 is electrically connected to both the first end of the fourth resistor R4 and the processor 210, for transmitting the emergency switch status signal EK_ARM to the processor 210; the second end of the fourth resistor R4 is grounded. This configuration in this embodiment allows the emergency switch status signal EK_ARM to be transmitted to the processor 210 in a timely manner. For example, when the emergency switch K is on, the emergency switch status signal EK_ARM is at a high potential; when the emergency switch K is off, the emergency switch status signal EK_ARM is at a low potential.

[0074] Figure 6 This is a schematic diagram of the structure of a second power module provided in an embodiment of the present invention. See also... Figure 6In one embodiment, optionally, the second power module 40 mainly consists of a second power chip U4 and its peripheral circuitry. The second power chip U4 includes a control terminal Ctrl2, an input terminal Vin2, a ground terminal GND2, an output terminal Vo2, a zero-potential terminal V02, and an output adjustment terminal Trim2. The control terminal Ctrl2 of the second power chip U4 serves as the control terminal of the second power module 40, used to control the second power chip U4 to stop outputting power signals according to a first power-off control signal and / or a second power-off control signal. The second power chip U4 can convert 24VDC to 12VDC output. The peripheral circuitry of the second power chip U4 can be composed of components such as capacitors, inductors, and transient suppression diodes to achieve functions such as filtering protection and impedance matching. For example, a fuse F1 can be installed on the transmission path of the power signal 24V_MCB for current limiting protection, a transient suppression diode can be installed between the power signal 24V_MCB and the ground signal 24V_MCB_GND for overvoltage protection, and the control terminal Ctrl2 of the second power chip U4 can be connected to the ground signal 24V_GND through a resistor, etc. Additionally, electrolytic capacitors can be installed between the input terminal Vin2 and the ground terminal GND2 of the second power chip U4, and between the output terminal Vo2 and the zero potential terminal V02, as energy storage capacitors to stabilize the power input and output.

[0075] In summary, the protection circuit provided by the embodiments of the present invention can achieve multiple protections for the pulse ablation device from multiple angles and in multiple implementation modes, and can stop energy release in time when an emergency occurs, thus ensuring the safety of the pulse ablation device.

[0076] This invention also provides a pulse ablation device, including a pulse generation module, a relay, a treatment electrode, a first power supply module, a second power supply module, and a protection circuit as provided in any embodiment of this invention, which has corresponding beneficial effects. Exemplarily, both the pulse generation module and the relay module are electrically connected to a processor, and the operating states of both the pulse generation module and the relay module can be controlled by the processor.

[0077] The following describes the specific structures that pulse ablation devices may have.

[0078] Figure 7 This is a schematic diagram of the structure of a pulse ablation device provided in an embodiment of the present invention. See also... Figure 7 For example, the pulse generation module may include a boost unit 510, a storage unit 520, and a pulse generation unit 530. The boost unit 510 may be a BOOST circuit, the storage unit 520 may include a storage capacitor, and the pulse generation unit 530 may be a bridge circuit.

[0079] For example, the relay module 60 may be a relay board integrating multiple relays, such as 2, 4, or 8 relays, each relay corresponding to an electrical stimulation channel. All relay coils can be powered by the second power supply module 40. The treatment electrode 70 may include multiple electrode pairs, each electrode pair being disposed in its corresponding electrical stimulation channel. The pulse generation unit 530 is connected to each electrode through the contacts of each relay. The processor 210 can select the electrical stimulation channel as needed for the area to be stimulated and configure the electrical stimulation intensity through the pulse generation module. The relay contacts may be normally open contacts, closing when the relay coil is energized and opening when de-energized. Figure 7 In this example, the connection between the temperature acquisition unit and the control unit 120 is indicated by dashed lines. It should be noted that the treatment electrode 70 can be a patch electrode or a catheter electrode. Figure 7 The treatment electrode 70 is shown in block diagram only, and solid lines indicate that the treatment electrode 70 is connected to the tissue site of the patient that requires pulse ablation.

[0080] For example, the pulse ablation device may further include an energy release switch 80, electrically connected to the processor 210, for controlling the start time of electrical stimulation. For example, the operation of the pulse ablation device may be as follows: the host computer 90 sends configuration parameters to the processor 210; the processor 210 controls the boost unit 510 to perform boost processing and charge the storage unit 520; after charging is complete, the processor 210 controls the boost unit 510 to stop working; when the energy release switch 80 is pressed, the processor 210 controls the working state of the pulse generation unit 530 to generate a high-voltage pulse signal (provided by the storage unit 520); simultaneously, the processor 210 controls the relay of the target electrical stimulation channel to open, so that the high-voltage pulse signal releases energy to the patient through the corresponding stimulation electrode in the treatment electrode 70.

[0081] For example, the relay module 60 and the second power module 40 can be integrated on the relay board. The circuit parts of the processor 210, the second protection unit 220, the first power module 30, the pulse generation unit 530, and the emergency triggering unit 230, excluding the emergency switch, can all be integrated on the main control board.

[0082] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A protection circuit, characterized in that, The device is applied to a pulse ablation device, which includes: a pulse generation module, a relay module, a treatment electrode, a first power supply module, and a second power supply module. The pulse generation module is electrically connected to the treatment electrode through the relay module. The first power supply module supplies power to the pulse generation module, and the second power supply module supplies power to the relay module. The protection circuit includes: a temperature acquisition board; the temperature acquisition board includes: a temperature acquisition unit and a control unit; The temperature acquisition unit is electrically connected to the control unit; the temperature acquisition unit is used to acquire the temperature of the treatment electrode. The control unit is used to determine whether the temperature of the treatment electrode is abnormal, and to generate a protection signal when the temperature of the treatment electrode is abnormal, so as to control the first power module and / or the second power module to stop supplying power. The protection signal includes: a first control signal; The temperature acquisition board further includes: a first protection unit; the control terminal of the first protection unit is electrically connected to the control unit and is used to receive the first control signal; a first terminal of the first protection unit is connected to a first potential signal, a second terminal of the first protection unit is connected to a second potential signal, and the output terminal of the first protection unit is electrically connected to the control terminal of the first power module and / or the control terminal of the second power module; the first protection unit is used to output the second potential signal as a first power-off control signal when the first control signal is received.

2. The protection circuit according to claim 1, characterized in that, The first protection unit includes: a first optocoupler and a first resistor; The first end of the first optocoupler serves as the control end of the first protection unit, the second end of the first optocoupler is grounded, the third end of the first optocoupler serves as the output end of the first protection unit, and the fourth end of the first optocoupler serves as the second end of the first protection unit; the first end of the first resistor serves as the first end of the first protection unit, and the second end of the first resistor is electrically connected to the third end of the first optocoupler.

3. The protection circuit according to claim 1, characterized in that, The protection signals include: temperature anomaly signals; The protection circuit also includes: a processor and a second protection unit; The processor is electrically connected to the control unit, and the processor is used to generate a second control signal based on the temperature anomaly signal; The control terminal of the second protection unit is electrically connected to the processor. The first terminal of the second protection unit is connected to a first potential signal, the second terminal of the second protection unit is connected to a second potential signal, and the output terminal of the second protection unit is electrically connected to the control terminal of the first power module and / or the control terminal of the second power module. The second protection unit is used to output the second potential signal as a second power-off control signal when the second control signal is connected.

4. The protection circuit according to claim 3, characterized in that, The second protection unit includes: a first transistor, a second optocoupler, and a second resistor; The control terminal of the first transistor serves as the control terminal of the second protection unit, and the first terminal of the first transistor is grounded; the first terminal of the second optocoupler is connected to the first power signal, the second terminal of the second optocoupler is electrically connected to the second terminal of the first transistor, the third terminal of the second optocoupler serves as the first terminal of the second protection unit, and the fourth terminal of the second optocoupler serves as the output terminal of the second protection unit; the first terminal of the second resistor serves as the second terminal of the second protection unit, and the second terminal of the second resistor is electrically connected to the fourth terminal of the second optocoupler.

5. The protection circuit according to claim 4, characterized in that, Also includes: An emergency triggering unit; the emergency triggering unit includes an emergency switch, the first end of the emergency switch is connected to the first power signal, and the second end of the emergency switch is electrically connected to the first end of the second optocoupler.

6. The protection circuit according to claim 5, characterized in that, The emergency triggering unit further includes: a third resistor and a fourth resistor; The first end of the third resistor is electrically connected to the second end of the emergency switch, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the processor, and the second end of the fourth resistor is grounded.

7. The protection circuit according to claim 3, characterized in that, It also includes: an electrical signal acquisition unit; the electrical signal acquisition unit is electrically connected to the processor; the electrical signal acquisition unit is used to acquire electrical signals on the treatment electrode, and the processor is also used to generate the second control signal when the electrical signal is abnormal.

8. The protection circuit according to claim 1, characterized in that, Also includes: The host computer; the input / output interface of the host computer is electrically connected to at least one of the control unit, the control terminal of the first power module, and the control terminal of the second power module.

9. A pulse ablation device, characterized in that, include: The pulse generation module, the relay module, the treatment electrode, the first power supply module, the second power supply module, and the protection circuit as described in any one of claims 1-8.

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