CN219304462U

CN219304462U - Protection circuit and pulse ablation device

Info

Publication number: CN219304462U
Application number: CN202223326592.5U
Authority: CN
Inventors: 李阳; 张勤; 裴均杰; 胡承琪; 孙娓娓
Original assignee: Shanghai Shengdaji Medical Technology Co ltd
Current assignee: Shanghai Shengdaji Medical Technology Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-07-04
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a protection circuit and pulse ablation equipment. The protection circuit includes: a temperature acquisition plate; the temperature acquisition board includes: and the temperature acquisition unit and the control unit. The temperature acquisition unit is electrically connected with the control unit; the temperature acquisition unit is used for acquiring the temperature of the treatment electrode; the control unit is used for judging whether the temperature of the treatment electrode is abnormal or not, and generating a protection signal when the temperature of the treatment electrode is abnormal so as 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 for supplying power to the pulse generation module in the pulse ablation equipment, and the second power supply module is used for supplying power to the relay module in the pulse ablation equipment. The embodiment of the utility model can improve the reliability of the protection circuit.

Description

Protection circuit and pulse ablation device

Technical Field

The utility model relates to the technical field of protection circuits, in particular to a protection circuit and pulse ablation equipment.

Background

For pulse ablation devices, during treatment, when a patient and/or device is experiencing an emergency condition, the device is required to be quickly shut down for the protection of the patient's personal safety.

The protection scheme in the prior art generally sends a stop instruction to a main control chip in the equipment controller through a man-machine interaction interface or an energy release key, and the main control chip controls the equipment to stop energy release. Or the main control chip receives the voltage and current data, judges whether the abnormality occurs according to the voltage and current data, and controls the equipment to stop energy release when the abnormality occurs. However, the equipment operator needs a certain time to find the abnormality and make the corresponding reaction, and a long time delay exists from the occurrence of the abnormality to the controlled shutdown of the equipment; moreover, the electrical parameters such as voltage and current cannot fully reflect the contact state of the treatment electrode and the body tissue of the patient, and the condition that the current does not exceed the rated threshold value cannot be judged, but the burn of the tissue of the patient is caused by other factors such as overlong electrifying time. Thus, the reliability of existing electrical stimulation protection schemes is low.

Disclosure of Invention

The utility model provides a protection circuit and pulse ablation equipment, which are used for improving the reliability of the protection circuit.

In a first aspect, an embodiment of the present utility model provides a protection circuit applied to a pulse ablation apparatus, the pulse ablation apparatus including: the device comprises a pulse generation module, a relay module, a treatment electrode, a first power module and a second power module, wherein the pulse generation module is electrically connected with the treatment electrode through the relay module, the first power module is used for supplying power to the pulse generation module, and the second power module is used for supplying power to the relay module;

The protection circuit includes: a temperature acquisition plate; the temperature acquisition board includes: a temperature acquisition unit and a control unit;

the temperature acquisition unit is electrically connected with the control unit; the temperature acquisition unit is used for acquiring the temperature of the treatment electrode;

the control unit is used for judging whether the temperature of the treatment electrode is abnormal or not, and generating a protection signal when the temperature of the treatment electrode is abnormal so as to control the first power supply module and/or the second power supply module to stop supplying power.

Optionally, the protection signal includes: a first control signal;

the temperature acquisition board further includes: a first protection unit; the control end of the first protection unit is electrically connected with the control unit and is used for accessing the first control signal; the first end of the first protection unit is connected with a first potential signal, the second end of the first protection unit is connected with a second potential signal, and the output end of the first protection unit is electrically connected with the control end of the first power supply module and/or the control end of the second power supply module; the first protection unit is used for outputting the second potential signal as a first power-off control signal when the first control signal is accessed.

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

the first end of the first photoelectric coupler is used as the control end of the first protection unit, the second end of the first photoelectric coupler is grounded, the third end of the first photoelectric coupler is used as the output end of the first protection unit, and the fourth end of the first photoelectric coupler is used as the second end of the first protection unit; the first end of the first resistor is used as the first end of the first protection unit, and the second end of the first resistor is electrically connected with the third end of the first photoelectric coupler.

Optionally, the protection signal includes: a temperature anomaly signal;

the protection circuit further includes: a processor and a second protection unit;

the processor is electrically connected with the control unit and is used for generating a second control signal according to the temperature abnormality signal;

the control end of the second protection unit is electrically connected with the processor, the first end of the second protection unit is connected with a first potential signal, the second end of the second protection unit is connected with a second potential signal, and the output end of the second protection unit is electrically connected with the control end of the first power supply module and/or the control end of the second power supply module; the second protection unit is used for outputting the second potential signal as a second power-off control signal when the second control signal is accessed.

Optionally, the second protection unit includes: a first transistor, a second photocoupler, and a second resistor;

the control electrode of the first transistor is used as the control end of the second protection unit, and the first electrode of the first transistor is grounded; the first end of the second photoelectric coupler is connected with a first power supply signal, the second end of the second photoelectric coupler is electrically connected with the second pole of the first transistor, the third end of the second photoelectric coupler is used as the first end of the second protection unit, and the fourth end of the second photoelectric coupler is used as the output end of the second protection unit; the first end of the second resistor is used as a second end of the second protection unit, and the second end of the second resistor is electrically connected with the fourth end of the second photoelectric coupler.

Optionally, the protection circuit further includes: an emergency trigger unit; the emergency triggering unit comprises an emergency switch, a first end of the emergency switch is connected with the first power supply signal, and a second end of the emergency switch is electrically connected with the first end of the second photoelectric coupler.

Optionally, the emergency trigger unit further comprises: a third resistor and a fourth resistor;

The first end of the third resistor is electrically connected with the second end of the emergency switch, the second end of the third resistor is electrically connected with the first end of the fourth resistor and the processor respectively, and the second end of the fourth resistor is grounded.

Optionally, the protection circuit further includes: an electric signal acquisition unit; the electric signal acquisition unit is electrically connected with the processor; the electric signal acquisition unit is used for acquiring electric signals on the treatment electrode, and the processor is also used for generating the second control signal when the electric signals are abnormal.

Optionally, the protection circuit further includes: an upper computer; the input/output interface of the upper computer is electrically connected with at least one of the control unit, the control end of the first power supply module and the control end of the second power supply module.

In a second aspect, embodiments of the present utility model further provide a pulse ablation apparatus, including: the device comprises a pulse generating module, a relay module, a treatment electrode, a first power module, a second power module and a protection circuit provided by any embodiment of the utility model.

The protection circuit provided by the embodiment of the utility model is provided with the temperature acquisition board, the temperature of the treatment electrode is acquired in real time through the temperature acquisition unit, abnormal temperature rise of the treatment electrode can be found in time, and the first power supply module and/or the second power supply module are/is controlled to stop supplying power through the control unit in time, so that the source of the electric stimulation pulse is cut off and/or the transmission path of the electric stimulation pulse is cut off, the treatment electrode is controlled to stop releasing energy to a patient, and compared with the protection timeliness can be better ensured through manual control. In addition, in this embodiment, the control unit may directly determine whether the pulse ablation device has a risk of burning the patient according to the temperature of the treatment electrode, and the determination basis is more intuitive and accurate than the electrical parameter, so that the power supply may be turned off in time before the burn of the patient appears, and injuries caused by equipment faults are reduced. Therefore, compared with the prior art, the embodiment of the utility model can improve the reliability of the protection circuit so as to ensure the safety of the pulse ablation equipment.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a protection circuit according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of another protection circuit according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a protection circuit according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a first protection unit according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a connection relationship between a second protection unit, an emergency triggering unit and a first power module according to an embodiment of the present utility model;

Fig. 6 is a schematic structural diagram of a second power module according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a pulse ablation device according to an embodiment of the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The embodiment of the utility model provides a protection circuit which can be applied to medical equipment such as pulse ablation equipment and the like for treating a patient in an electric stimulation mode, so that the treatment electrode can be controlled to stop energy release in time when the patient and/or the medical equipment have an emergency during treatment.

In order to facilitate the description of the operation of the protection circuit, the structure and operation of the pulse ablation device will be briefly described with reference to fig. 1. Illustratively, the pulse ablation device includes at least: a pulse generation module 50, a relay module 60, a therapy electrode 70, a first power module 30, and a second power module 40. The pulse generation module 50 is electrically connected to the therapy electrode 70 through the relay module 60, the first power module 30 is for supplying power to the pulse generation module 50, and the second power module 40 is for supplying power to the relay module 60.

The pulse ablation device can also comprise a main control chip, and the working process of the pulse ablation device can be as follows: the main control chip controls the pulse generating 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, and the treatment electrode 70 releases energy to the patient. Wherein, the first power module 30 and the second power module 40 may be power sources for supplying power to a control part (i.e., a weak current part) of the connected functional modules.

On this basis, the embodiment of the present utility model provides a protection circuit for controlling the therapy electrode 70 to stop releasing energy by cutting off the output of at least one power supply module. The protection circuit provided by the embodiment of the utility model is described below.

Referring to fig. 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 with the control unit 120. The temperature acquisition unit 110 is used for acquiring the temperature of the treatment electrode 70. The control unit 120 is configured to determine whether the temperature of the therapeutic electrode 70 is abnormal, and generate a protection signal to control the first power module 30 and/or the second power module 40 to stop supplying power when the temperature of the therapeutic electrode 70 is abnormal.

The temperature acquisition unit 110 may be formed by a temperature acquisition device such as a temperature sensor, a temperature acquisition probe such as a thermal resistor or a thermocouple, an infrared temperature sensor, or the like. The temperature acquisition unit 110 transmits the acquired temperature to the control unit 120. Because the electric stimulation can cause a thermal effect, the too strong or too long stimulation can cause too high temperature rise to burn human tissues. Therefore, the state information of the electric stimulation can be intuitively acquired in real time through the acquisition of the temperature of the treatment electrode 70, so that timely protection is realized.

The control unit 120 is used for judging whether the treatment state is abnormal according to whether the temperature of the treatment electrode 70 is abnormal, and determining whether the protection signal is generated according to the judgment. For example, when the temperature of the treatment electrode 70 exceeds a preset temperature threshold, or the temperature change rate exceeds a preset change rate threshold, it may be determined that the temperature is abnormal, and the treatment is predicted to be at risk, otherwise it may be determined that the temperature is normal, and the treatment state is normal. When the control unit 120 determines that the temperature is abnormal, a protection signal may be generated; the protection signal may be directly transmitted to the control end of the first power module 30 and/or the second power module 40, so that the power module receiving the protection signal stops supplying power; or, the protection signal may be used to trigger the protection unit connected to the power module to act, and indirectly control the corresponding power module to stop supplying power through the protection unit, where the specific control method is not limited. When the control unit 120 determines that the temperature is normal, a power supply enable signal may be output to control the two power supply modules to continue normal power supply. The control unit 120 may be a micro control unit (Micro Control Unit, MCU) for example.

In the protection circuit provided by the embodiment of the utility model, the temperature acquisition board 100 is arranged, the temperature of the treatment electrode is acquired in real time through the temperature acquisition unit 110, abnormal temperature rise of the treatment electrode 70 can be found in time, and the first power supply module 30 and/or the second power supply module 40 are/is controlled to stop supplying power in time through the control unit 120, so that the source of the electric stimulation pulse is cut off and/or the transmission path of the electric stimulation pulse is cut off, and the treatment electrode 70 is controlled to stop releasing energy to a patient. In addition, in this embodiment, the control unit 120 can directly determine whether the pulse ablation device has a risk of burning the patient according to the temperature of the treatment electrode 70, and the determination basis is more visual and accurate than the electrical parameter, so that the power supply can be cut off in time before the burn of the patient appears, and the damage caused by the equipment failure is reduced. Therefore, compared with the prior art, the embodiment of the utility model can improve the reliability of the protection circuit so as to ensure the safety of the pulse ablation equipment.

Fig. 2 is a schematic structural diagram of another protection circuit provided in the embodiment of the present utility model, referring to fig. 2, optionally, on the basis of the foregoing embodiments, the protection signal includes: a first control signal ESTOP_ARM. The temperature acquisition board 100 further includes: a first protection unit 130; the control end 13 of the first protection unit 130 is electrically connected to the control unit 120, and is used for accessing a 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 electrical connection to the control terminal of the first power module 30 is shown as an example).

The first protection unit 130 is configured to control the second terminal 12 and the output terminal 14 to be turned on when the first control signal estop_arm is connected, and output the second potential signal V2 as a first power-off control signal to control the connected power module to stop supplying power. And, the first protection unit 130 may control the conduction between the first terminal 11 and the output terminal 14 when the power supply enable signal is accessed, and output the first potential signal V1 as an enable control signal to control the connected power supply module to start supplying power. The first protection unit 130 may be exemplarily constituted by a switching control device such as a transistor or an optocoupler and peripheral circuits thereof. For example, the first potential signal V1 is used to control the power module to supply power normally outwards, and the first potential signal V1 may be a high potential signal (or a potential signal that can be recognized as a logic 1 by the control terminal of the corresponding power module); the second potential signal V2 is used to control the power supply module to stop supplying power, and the second potential signal V2 may be a low potential signal (or a potential signal that can be recognized as logic 0 by the control terminal of the corresponding power supply module).

The above-described embodiments provide one way for the control unit to control whether the power module is powered out, but are not limiting of the utility model.

With continued reference to fig. 2, in another embodiment, optionally, the protection signal includes: a temperature anomaly signal ES. The protection circuit further includes: a processor 210 and a second protection unit 220. The processor 210 is electrically connected to the control unit 120. The control end 23 of the second protection unit 220 is electrically connected to the processor 210, the first end 21 of the second protection unit 220 is connected to the first potential signal V1, the second end 22 of the second protection unit 220 is connected to the second potential signal V2, and the output end 24 of the second protection unit 220 is electrically connected to the control end of the first power module 30 and/or the control end of the second power module (here, the electrical connection to the control end of the first power module 30 is still shown as an example).

The processor 210 is configured to generate a second control signal pwr_en_arm according to the temperature anomaly signal ES. The second protection unit 220 is configured to output the second potential signal V2 as a second power-off control signal when the second control signal pwr_en_arm is connected. For example, when the temperature anomaly signal ES is not received, or when the power supply enable signal transmitted by the control unit 120 is received, the processor 210 may control the conduction between the first terminal 21 and the output terminal 24 of the second protection unit 220, so that the second protection unit 220 outputs the first potential signal V1 as the enable control signal to control the connected power module to start supplying power.

In this embodiment, the control unit 120 communicates with the processor 210, and the temperature anomaly signal may be, for example, an abnormal temperature itself, and the processor 210 may determine whether the treatment status is abnormal again according to the abnormal temperature, and determine whether to output the second control signal pwr_en_arm according to the abnormal temperature, so as to prevent the malfunction of the second protection unit 220. Alternatively, the temperature anomaly signal may be a determination result of the control unit 120, and the processor 210 may directly analyze the result and output the second control signal pwr_en_arm to ensure control timeliness. Illustratively, the control unit 120 may also transmit the temperature of the therapy electrode 70 to the processor in real time, and both the control unit 120 and the processor 210 may make real-time decisions based on the acquired temperature and react in time when a temperature anomaly is determined. In addition, the processor 210 may also collect other parameters during operation of the medical device, and when the other parameters indicate that there is an abnormality in the treatment process, the processor 210 may also respond to output the second control signal pwr_en_arm. Illustratively, the processor 210 may be a processor that is native to the pulse ablation device for controlling the operation of the device to simplify the device architecture. The processor 210 may be a central processing unit (Central Processing Unit, CPU), and the second protection unit 220 may be formed of a switching control device such as a transistor or an optocoupler and peripheral circuits thereof.

In yet another embodiment, optionally, the temperature control board 100, the processor 210 and the second protection unit 220 may be configured simultaneously in the protection circuit, thereby achieving dual protection of the pulse ablation device. When the control unit 120 determines that the temperature collected by the temperature collection unit 110 is abnormal, the control unit 120 may directly and quickly control the corresponding power module to stop supplying power through the first protection unit 130. Meanwhile, through communication between the control unit 120 and the processor 210, a connection between the temperature acquisition board 100 and the processor 210 is established, and when the temperature is abnormal, the processor 210 can also respond to the abnormality, and the corresponding power module is controlled to stop supplying power through the second protection unit 220. The signal transmission process through the first protection unit 130 is simpler, has better timeliness, and can realize quick power failure; the second protection unit 220 may serve as an auxiliary protection for the first protection unit 220 to ensure that the output of the therapy electrode 70 may be cut off in the event of an abnormality. And the action processes of the two protection units are relatively independent, when any protection unit fails due to failure, the other protection unit can perform corresponding protection action according to the accessed control signal, and the reliability of the protection circuit is effectively improved. Preferably, the first protection unit 130 and the second protection unit 220 are connected to two power modules, and when an abnormality occurs, the two power-off control signals can control the two power modules to stop outputting, so as to realize dual protection.

Alternatively, the first potential signal V1 may be a DC voltage signal, for example, 24 vdc, and the second potential signal V2 may be a low potential signal such as a power supply return ground signal or a common ground signal. Compared with a digital level (TTL), the potential of the first potential signal V1 is higher, the potential difference between the first potential signal V1 and the second potential signal V2 is larger, the anti-interference capability is better, and the voltage fluctuation caused by interference is not easy to be mistakenly identified by a control end of the power supply module, so that the reliability of the protection circuit is ensured.

Based on the above embodiments, optionally, an RS422 communication manner may be adopted between the control unit 120 and the processor 210, so as to enhance the stability of communication and minimize the problem of packet loss in data transmission caused by interference to communication.

Fig. 3 is a schematic structural diagram of another protection circuit according to an embodiment of the present utility model. Referring to fig. 3, on the basis of the above embodiments, optionally, the protection circuit further includes: an emergency trigger unit 230. The second protection unit 220 further comprises an emergency control terminal 25, the first output terminal of the emergency trigger unit 230 being electrically connected to the emergency control terminal 25 of the second protection unit 220. The control end 23 of the second protection unit 220 and the signal accessed by the emergency control end 25 together determine the output state of the second protection unit 220. For example, when the control terminal 23 of the second protection unit 220 is connected to any power-off control signal, or the emergency trigger unit 230 transmits a stopping potential to the emergency control terminal 25, the second terminal 22 of the second protection unit 220 is controlled to communicate with the output terminal 24, so as to control each power module to stop supplying power. For example, a mechanical emergency switch may be provided in the emergency trigger unit 230 to allow the healthcare worker to shut down the device in time when an abnormality is found.

Further, the emergency trigger unit 230 may further include a second output terminal electrically connected to the processor 210, and the second output terminal of the emergency trigger unit 230 may output an emergency switch status signal for informing the processor 210 of the current status of the emergency trigger unit 230, for example, whether the emergency switch is pressed. The processor 210 may respond to the emergency switch status signal, for example, by outputting a second control signal. Thus, the present embodiment achieves double protection based on the emergency trigger unit 230.

With continued reference to fig. 3, on the basis of the above embodiments, optionally, the protection circuit further includes: an electric signal acquisition unit 240; the electrical signal acquisition unit 240 is electrically connected to the processor 210. The electrical signal acquisition unit 240 is configured to acquire an electrical parameter, such as a current flowing through the therapy electrode (i.e. a current flowing through the patient) or a potential on the therapy electrode, and the processor 210 is further configured to generate a second control signal when the electrical signal is abnormal. For example, the processor 210 may determine whether the electrical signal is abnormal based on whether the value or the rate of change of the electrical signal exceeds a set and threshold value. The setting processor 210 of this embodiment may also generate the second control signal according to the electrical signal, so that the protection circuit may implement more comprehensive protection.

With continued reference to fig. 3, on the basis of the foregoing embodiments, optionally, the protection circuit further includes: an upper computer 90; the input/output interface of the upper 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. Fig. 3 schematically shows that the input/output interface of the upper computer 90 is electrically connected to the control terminal of the first power module 30. In this embodiment, another re-protection is added, and the control of the first protection unit 130, the second protection unit 220 or each functional module is directly implemented through the upper computer 90, so that when the control unit 120 and/or the processor 210 fail, or when the equipment fails and the non-control unit 120 and the processor 210 can detect the failure, the upper computer 90 can rapidly power off the equipment.

In addition, the upper computer 90 may be further connected to the processor 210, where the processor 210 may be used to control the output state of the second protection unit 220, and also may be used as a controller in the pulse ablation device, to control the working process of the pulse ablation device, and the medical staff may send a working instruction to the processor 210 through the upper computer 90, so that the processor 210 controls the working of the pulse generating module and selects a relay channel according to the working instruction. Illustratively, the upper computer 90 may include a human-computer interaction module, such as a touch screen, a keyboard, buttons, keys, and the like.

Based on the above embodiments, optionally, handshake communication can be performed between the upper computer 90 and the processor 210, and between the processor 210 and the control unit 120 at intervals of a small period, and once one party in normal operation cannot receive the handshake signal of the other party, a protection mechanism is triggered, and the control device stops working, so as to avoid security risks caused by communication interruption or the crash of the processor 210.

In summary, the protection circuit provided by the embodiment of the utility model can realize multiple protection. Specifically, the protection process via the control unit 120-the first protection unit 130 may be used as a re-protection. The protection process via the control unit 120-the processor 210-the second protection unit 220 may be used as another re-protection. The protection process implemented via the input-output interface of the host computer 90 may be used as a further re-protection. The protection process implemented via the emergency trigger unit 230 may be used as a further protection. The 4-fold protection is matched, any one of the 4-fold protection is triggered, each power supply module can be effectively controlled to stop supplying power, and the safety of the electrical stimulation medical equipment can be greatly improved. In the embodiment of the utility model, the 4-fold protection has mutual independence and mutual influence. Mutual independence is characterized in that each protection mechanism is provided with an independent and complete control loop, the conditions required by each protection scheme for triggering the protection mechanism are different, and different schemes can be independently carried out. The mutual influence is shown in the following steps: any 1 of the 4 schemes triggers a protection mechanism to stop power supply of each power supply module, and other protection mechanisms keep a normal non-action state and do not enable the power supply modules to resume power supply.

The above embodiments exemplarily illustrate the operation of each functional module in the protection circuit, and the following describes a specific structure that each functional module may have, but is not limited to the present utility model.

Fig. 4 is a schematic structural diagram of a first protection unit according to an embodiment of the present utility model. Referring to fig. 4, in one embodiment, optionally, the first protection unit 130 includes: a first photo coupler U1 and a first resistor R1. The first end of the first photo coupler U1 is used as a control end of the first protection unit 130, and is connected to a first control signal estop_arm; the second end of the first photoelectric coupler U1 is grounded, namely, is connected with a ground signal GND; the third terminal of the first photo coupler U1 is used as an output terminal of the first protection unit 130 for outputting a first power-off control signal estop_tsb; the fourth end of the first photo coupler U1 is used as the second end of the first protection unit 130, and is connected with a second potential signal V2; a first end of the first resistor R1 is used as a first end of the first protection unit 130, and is connected to a first potential signal V1; the second end of the first resistor R1 is electrically connected to the third end of the first photocoupler U1.

Illustratively, the first potential signal V1 may be a direct voltage signal 24VDC and the second potential signal V2 may be a power supply return 24v_rtn. In addition, the first protection unit 130 may further include therein a peripheral circuit composed of resistors for current limiting and filtering, etc., such as resistors R21 and R22 in fig. 3.

Illustratively, the control procedure of the first protection unit 130 may be: when the control unit 120 determines that the temperature is abnormal, the control unit 120 rapidly outputs a high-potential first control signal estop_arm to enable the transmitting part of the first photo coupler U1 to be turned on and emit light, so that the receiving part of the first photo coupler U1 is turned on, the second potential signal V2 is transmitted to the output end of the first protection unit 130 through the receiving part of the first photo coupler U1, and is output as a low-potential first power-off control signal estop_tsb, and the low-potential can control the first power module 30 to be output, so that a subsequent series of circuits powered by the output of the first power module 30 are disabled, and/or control the second power module 40 to be output, so that all channel relays in the relay module are turned off, and the system is ensured to be incapable of outputting high-voltage pulses.

In this embodiment, the first protection unit 130 is formed by using a photoelectric coupler, which can also play a role in electrical isolation on the basis of realizing a switch control function, thereby improving the safety of equipment.

Fig. 5 is a schematic diagram of a connection relationship between a second protection unit, an emergency triggering unit and a first power module according to an embodiment of the present utility model. Referring to fig. 5, the first power module 30 may be exemplarily constituted by a first power chip U3 and its peripheral circuits. 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 end Ctrl1 of the first power chip U3 is used as a control end of the first power module 30, and is configured to control the first power chip U3 to stop outputting the power signal according to the first power-off control signal and/or the second power-off control signal. The peripheral circuit of the first power supply chip U3 may be formed of elements such as a capacitor and an inductor, so as to realize functions such as filtering protection and impedance matching. Illustratively, the first power chip U3 may convert 24VDC to a 3.3VDC or 5VDC output.

With continued reference to fig. 5, in one embodiment, optionally, the second protection unit 220 includes: a first transistor Q1, a second photo coupler U1 and a second resistor R2. The control electrode of the first transistor Q1 is used as the control end of the second protection unit 220, and is connected to the second control signal pwr_en_arm; the first electrode of the first transistor Q1 is grounded; the first end of the second photoelectric coupler U2 is connected with a first power supply signal VCC, the second end of the second photoelectric coupler U2 is electrically connected with the second pole of the first transistor Q1, and the third end of the second photoelectric coupler U2 is used as the first end of the second protection unit 220 and is connected with a first potential signal V1; the fourth end of the second photo coupler U2 is used as an output end of the second protection unit 220, for outputting a second power-off control signal; the first end of the second resistor R2 is used as a second end of the second protection unit 220, and is connected to the second potential signal V2; the second end of the second resistor R2 is electrically connected to the fourth end of the second photo coupler U2.

Illustratively, the first transistor Q1 may be an NMOS transistor and the first power supply signal VCC may be a direct voltage signal +5vdc. In addition, the second protection unit 220 may further include a peripheral circuit for current limiting and filtering, etc. composed of a resistor and a capacitor, for example, a resistor connected to the gate and the first pole of the first transistor Q1, a capacitor connected to the output terminal of the second protection unit 220, etc.

Illustratively, the control procedure of the second protection unit 220 may be: when the control unit 120 determines that the temperature is abnormal, the control unit outputs a first control signal and communicates with the processor 210 in an RS422 manner, so as to inform the processor 210 that the temperature is abnormal currently, 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 be turned off, so that the transmitting portion of the second photo coupler U2 is turned off to stop emitting light, and the receiving portion of the second photo coupler U2 is turned off; the second potential signal V2 is transmitted to the output terminal of the second protection unit 220 through the second resistor R2, and is output as a second power-off control signal of low potential, to control the first power module 30 and the second power module 40 to stop outputting.

For example, the signal led OUT from the second protection unit 220 may be denoted as a control signal estop_out_edb, which is low when the first power-off control signal estop_tsb and/or the second power-off control signal exist.

With continued reference to fig. 5, in the foregoing embodiments, the emergency triggering unit 230 may optionally include an emergency switch K, where a first end of the emergency switch K is connected to the first power signal VCC, and a second end of the emergency switch K is electrically connected to the first end of the second optocoupler U2. The arrangement is equivalent to connecting the emergency switch K to the input path of the first end of the second photocoupler U2, when an emergency occurs, the transmission path of the first power signal VCC to the first end of the second photocoupler U2 can be disconnected by disconnecting the emergency switch K, so that the transmitting portion of the second photocoupler U2 is turned off to stop emitting light, and the second protection unit 220 outputs the second power-off control signal to control the first power module 30 and/or the second power module 40 to stop outputting, thereby realizing the emergency shutdown function.

Illustratively, the emergency switch K may be connected to the circuit via a connection interface P1, the connection interface P1 including pin 1, pin 2, and pin 3. The first end of the emergency switch K is connected with a first power supply signal VCC through a pin 3 of the connection interface P1, and the second end of the emergency switch K is electrically connected with the first end of the second photoelectric coupler U2 through the pin 1 of the connection interface P1; pin 2 of connection interface P1 is left empty. In addition, the emergency trigger unit 230 may further include a peripheral protection circuit for current limiting, filtering, overvoltage protection, etc. which is formed by elements such as a resistor, an inductor, a transient suppression diode, etc.

With continued reference to fig. 5, on the basis of the above embodiments, the emergency trigger unit 230 optionally further includes: a third resistor R3 and a fourth resistor R4. The first end of the third resistor R3 is electrically connected with the second end of the emergency switch K; the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the processor 210, respectively, for transmitting the emergency switch status signal ek_arm to the processor 210, and the second end of the fourth resistor R4 is grounded. The present embodiment is configured such that the emergency switch status signal ekarm is transmitted to the processor 210 in time. Illustratively, when the emergency switch K is on, the emergency switch status signal EK_ARM is high; when the emergency switch K is turned off, the emergency switch status signal ekarm is low.

Fig. 6 is a schematic structural diagram of a second power module according to an embodiment of the present utility model. Referring to fig. 6, in one embodiment, the second power module 40 is optionally mainly composed of the second power chip U4 and its peripheral circuits. 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 end Ctrl2 of the second power chip U4 is used as a control end of the second power module 40, and is configured to control the second power chip U4 to stop outputting the power signal according to the first power-off control signal and/or the second power-off control signal. The second power chip U4 may convert 24VDC to a 12VDC output. The peripheral circuit of the second power supply chip U4 may be formed by elements such as a capacitor, an inductor, and a transient suppression diode, so as to implement functions such as filtering protection and impedance matching. Illustratively, on the transmission path of the power supply signal 24v_mcb, a fuse F1 may be provided as a current limiting protection, a transient suppression diode may be provided between the power supply signal 24v_mcb and the ground signal 24v_mcb_gnd as an overvoltage protection, the control terminal Ctrl2 of the second power supply chip U4 may be provided to be connected to the ground signal 24v_gnd through a resistor, and so on. In addition, an electrolytic capacitor may be further provided as an energy storage capacitor 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, to stabilize power input and output.

In summary, the protection circuit provided by the embodiment of the utility model can realize multiple protection of the pulse ablation device in multiple angles and multiple implementation modes, and can stop energy release in time when an emergency occurs, so that the safety of the pulse ablation device is ensured.

The embodiment of the utility model also provides pulse ablation equipment which comprises a pulse generation module, a relay module, a treatment electrode, a first power supply module, a second power supply module and the protection circuit provided by any embodiment of the utility model, and has corresponding beneficial effects. The pulse generating module and the relay module are each electrically connected to the processor, and the operating states of the pulse generating module and the relay module are each controllable by the processor.

Specific structures that may be provided with a pulse ablation device are described below.

Fig. 7 is a schematic structural diagram of a pulse ablation device according to an embodiment of the present utility model. Referring to fig. 7, the pulse generation module may illustratively include: a boosting unit 510, a storage unit 520, and a pulse generation unit 530. The BOOST unit 510 may employ a BOOST circuit, the storage unit 520 may include a storage capacitor, and the pulse generating unit 530 may be a bridge circuit.

Illustratively, the relay module 60 may be a relay board integrated with a plurality of relays, such as 2, 4, or 8 relays, each relay corresponding to one electrical stimulation channel, all of which may be powered by the second power module 40. The treatment electrode 70 may include a plurality of electrode pairs each disposed in a corresponding electrical stimulation channel, respectively, and the pulse generating unit 530 is connected to each electrode through a contact of each relay. Processor 210 may select an electrical stimulation channel as desired for the location of the electrical stimulation and configure the electrical stimulation intensity via the pulse generation module. The contacts of the relay can be normally open contacts, and are closed when the coil of the relay is electrified and opened when the coil is deenergized. The connection between the temperature acquisition unit and the control unit 120 is exemplarily shown in fig. 7 with a dashed line. It should be noted that the treatment electrode 70 may be a patch electrode or a catheter electrode, and the treatment electrode 70 is shown in fig. 7 by way of example only by way of a block diagram, and the treatment electrode 70 is shown by way of a solid line as being connected to a tissue site of a patient in need of pulse ablation.

Illustratively, the pulse ablation device may further include: the energy release switch 80 is electrically connected to the processor 210 for controlling the electrical stimulation start time. Illustratively, the pulsed ablation device may operate as follows: the upper computer 90 sends the configuration parameters to the processor 210; the processor 210 controls the boosting unit 510 to perform boosting processing, charges the storage unit 520, and controls the boosting unit 510 to stop working after the charging is completed; when the energy release switch 80 is pressed, the processor 210 controls the operation state of the pulse generating unit 530 to generate a high voltage pulse signal (the high voltage is supplied from the storage unit 520); at the same time, processor 210 controls the opening of the relay of the target electrical stimulation channel to cause the high voltage pulse signal to release energy to the patient through the corresponding stimulation electrode in therapy electrode 70.

For example, the relay module 60 and the second power module 40 may be integrated on a relay board. The processor 210, the second protection unit 220, the first power module 30, the pulse generation unit 530, and the emergency trigger unit 230 may be integrated on the main control board.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims

1. A protection circuit for use with a pulse ablation device, the pulse ablation device comprising: the device comprises a pulse generation module, a relay module, a treatment electrode, a first power module and a second power module, wherein the pulse generation module is electrically connected with the treatment electrode through the relay module, the first power module is used for supplying power to the pulse generation module, and the second power module is used for supplying power to the relay module;

2. The protection circuit of claim 1, wherein the protection signal comprises: a first control signal;

3. The protection circuit according to claim 2, wherein the first protection unit includes: a first optocoupler and a first resistor;

4. The protection circuit according to claim 1 or 2, wherein the protection signal comprises: a temperature anomaly signal;

5. The protection circuit of claim 4, wherein the second protection unit comprises: a first transistor, a second photocoupler, and a second resistor;

6. The protection circuit of claim 5, further comprising: an emergency trigger unit; the emergency triggering unit comprises an emergency switch, a first end of the emergency switch is connected with the first power supply signal, and a second end of the emergency switch is electrically connected with the first end of the second photoelectric coupler.

7. The protection circuit of claim 6, wherein the emergency trigger unit further comprises: a third resistor and a fourth resistor;

8. The protection circuit of claim 4, further comprising: an electric signal acquisition unit; the electric signal acquisition unit is electrically connected with the processor; the electric signal acquisition unit is used for acquiring electric signals on the treatment electrode, and the processor is also used for generating the second control signal when the electric signals are abnormal.

9. The protection circuit of claim 1, further comprising: an upper computer; the input/output interface of the upper computer is electrically connected with at least one of the control unit, the control end of the first power supply module and the control end of the second power supply module.

10. A pulse ablation device, comprising: pulse generation module, relay module, therapy electrode, first power supply module, second power supply module and protection circuit according to any of claims 1-9.