CN219227454U

CN219227454U - Protection circuit of pulse ablation device and pulse ablation device

Info

Publication number: CN219227454U
Application number: CN202320225430.8U
Authority: CN
Inventors: 裴均杰; 张勤; 李阳; 胡承琪; 孙娓娓
Original assignee: Shanghai Shengdaji Medical Technology Co ltd
Current assignee: Shanghai Shengdaji Medical Technology Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-06-20
Anticipated expiration: 2033-02-15

Abstract

The utility model discloses a protection circuit of pulse ablation equipment and the pulse ablation equipment. The protection circuit includes: the device comprises a sampling module, a comparison module, a logic trigger device, an AND operation device and a control module. The sampling module is connected between the output end of the energy generation module and the relay module; the comparison module is electrically connected with the sampling module and is connected with a threshold voltage signal; the input end of the logic trigger device is electrically connected with the output end of the comparison module; the first input end of the computing device is electrically connected with the output end of the logic trigger device, and the output end of the computing device is electrically connected with the control end of the energy generation module; the input end of the control module is electrically connected with the output end of the comparison module, and the first output end of the control module is electrically connected with the control end of the relay module. The embodiment of the utility model can improve the reliability of the protection circuit and the safety of the pulse ablation equipment.

Description

Protection circuit of pulse ablation device and pulse ablation device

Technical Field

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

Background

For pulse ablation devices, during treatment, the energy generation system usually generates high-voltage pulse signals and applies the high-voltage pulse signals to a patient through electrodes, and if the device has faults, the device is required to stop energy output rapidly due to the requirement of protecting personal safety of the patient when abnormal conditions such as excessive energy output occur. In the prior art, an FPGA (Field-Programmable Gate Array, field programmable gate array) in a main control chip is generally used as a control core for fault detection, and by integrating current during energy transmission, whether a fault state of equipment exists is determined according to the integrated current value, and protection is realized through the FPGA. Therefore, the protection scheme in the prior art needs to be triggered and executed by the main control chip, and has the problem of single protection mode, once the main control chip is halted or other situations which lead to the failure of the main control chip occur, the whole equipment is out of control, and the protection mechanism of energy output can lose function, so that disastrous results can be caused. Thus, the reliability of the protection scheme of the existing pulse ablation device is low.

Disclosure of Invention

The utility model provides a protection circuit of pulse ablation equipment and the pulse ablation equipment, so as to improve the reliability of the protection circuit and the safety of the pulse ablation equipment.

In a first aspect, an embodiment of the present utility model provides a protection circuit of a pulse ablation apparatus, the pulse ablation apparatus including: the energy generation module, the relay module and the treatment electrode; the output end of the energy generation module is connected with the treatment electrode through the relay module;

the protection circuit includes:

the sampling module is connected between the output end of the energy generation module and the relay module;

the comparison module is electrically connected with the sampling module and is connected with a threshold voltage signal; the comparison module is used for generating a detection signal according to the sampling signal output by the sampling module and the threshold voltage signal;

the input end of the logic trigger device is electrically connected with the output end of the comparison module; the logic trigger device is used for generating a trigger signal according to the detection signal;

the first input end of the AND operation device is electrically connected with the output end of the logic trigger device, and the output end of the AND operation device is electrically connected with the control end of the energy generation module; the AND operation module is used for controlling whether the energy generation module works according to the trigger signal;

The input end of the control module is electrically connected with the output end of the comparison module, and the first output end of the control module is electrically connected with the control end of the relay module; the control module is used for controlling the conduction state of the relay module according to the detection signal.

Optionally, the output end of the energy generating module includes: a first output terminal and a second output terminal; the relay module includes: a first multi-channel relay and a second multi-channel relay; the therapy electrode includes: at least one electrode pair, each electrode pair comprising a first electrode and a second electrode;

the sampling module comprises: a first sampling resistor and a second sampling resistor; the comparison module comprises: a first amplification comparing unit and a second amplification comparing unit; the threshold voltage signal includes: a first threshold voltage signal and a second threshold voltage signal;

the first output end of the energy generation module is electrically connected with the first end of the first sampling resistor, the second end of the first sampling resistor is electrically connected with the first multichannel relay, and each first electrode is correspondingly connected with the output end of each channel of the first multichannel relay; the second output end of the energy generation module is electrically connected with the first end of the second sampling resistor, the second end of the second sampling resistor is electrically connected with the second multichannel relay, and each second electrode is correspondingly connected with the output end of each channel of the second multichannel relay respectively;

The first end of the first amplification comparison unit is electrically connected with the first end of the first sampling resistor, the second end of the first amplification comparison unit is electrically connected with the second end of the first sampling resistor, and the reference end of the first amplification comparison unit is connected with the first threshold voltage signal; the first end of the second amplifying and comparing unit is electrically connected with the first end of the second sampling resistor, the second end of the second amplifying and comparing unit is electrically connected with the second end of the second sampling resistor, and the reference end of the second amplifying and comparing unit is connected with the second threshold voltage signal; the output end of the first amplification comparing unit and the output end of the second amplification comparing unit jointly form the output end of the comparing module.

Optionally, the energy generating module further comprises a first power supply end and a second power supply end, wherein the first power supply end is electrically connected with the therapeutic power supply, and the second power supply end is electrically connected with the test power supply; the therapeutic power supply is different from the power supply voltage provided by the test power supply;

the comparison module further includes: a third amplification comparing unit and a fourth amplification comparing unit; the threshold voltage signal further comprises: a third threshold voltage signal and a fourth threshold voltage signal;

The first end of the third amplification comparison unit is electrically connected with the first end of the first sampling resistor, the second end of the third amplification comparison unit is electrically connected with the second end of the first sampling resistor, and the reference end of the third amplification comparison unit is connected with the third threshold voltage signal;

the first end of the fourth amplification comparison unit is electrically connected with the first end of the second sampling resistor, the second end of the fourth amplification comparison unit is electrically connected with the second end of the second sampling resistor, and the reference end of the fourth amplification comparison unit is connected with the fourth threshold voltage signal; the output end of the first amplification comparing unit, the output end of the second amplification comparing unit, the output end of the third amplification comparing unit and the output end of the fourth amplification comparing unit jointly form the output end of the comparing module.

Optionally, the first amplification comparing unit, the second amplification comparing unit, the third amplification comparing unit and the fourth amplification comparing unit are amplification comparing units with the same structure;

the amplification comparing unit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, an amplifier, a first comparator and a second comparator;

The first end of the first resistor is used as the first end of the amplifying and comparing unit, the second end of the first resistor is respectively and electrically connected with the negative input end of the amplifier and the first end of the second resistor, the second end of the second resistor is respectively and electrically connected with the first output end of the amplifier and the first end of the fifth resistor, and the second end of the fifth resistor is electrically connected with the positive output end of the first comparator; the first end of the third resistor is used as the second end of the amplifying and comparing unit, the second end of the third resistor is respectively and electrically connected with the positive input end of the amplifier and the first end of the fourth resistor, the second end of the fourth resistor is respectively and electrically connected with the second output end of the amplifier and the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected with the positive output end of the second comparator;

the negative input end of the first comparator and the negative input end of the second comparator are used as the reference end of the amplifying and comparing unit together, and the output end of the first comparator and the output end of the second comparator are used as the output end of the amplifying and comparing unit together.

Optionally, the logic trigger device includes: nor gates and monostable flip-flops;

The input end of the NOR gate is used as the input end of the logic trigger device, the output end of the NOR gate is electrically connected with the input end of the monostable trigger, and the output end of the monostable trigger is used as the output end of the logic trigger device.

Optionally, the control end of the energy generating module includes: a power supply control end and a pulse control end;

the AND operation device includes: a first and a second and gate;

the first input end of the first AND gate and the first input end of the second AND gate are electrically connected with the output end of the logic trigger device, the output end of the first AND gate is electrically connected with the power supply control end, and the output end of the second AND gate is electrically connected with the pulse control end.

Optionally, the control module includes: a processor and an isolation chip;

the input end of the processor is electrically connected with the output end of the comparison module, the first output end of the processor is electrically connected with the input end of the isolation chip, and the output end of the isolation chip is electrically connected with the control end of the relay module.

Optionally, a second output terminal of the processor is electrically connected to a second input terminal of the and-operation device;

The energy generation module further comprises a first power supply end and a second power supply end, wherein the first power supply end is electrically connected with the treatment power supply, and the second power supply end is electrically connected with the test power supply; and a third output end of the processor is electrically connected with the treatment power supply and the test power supply respectively.

Optionally, the protection circuit of the pulse ablation device further includes: an upper computer; and a fourth output end of the processor is electrically connected with the upper computer.

In a second aspect, embodiments of the present utility model further provide a pulse ablation apparatus, including: an energy generation module, a relay module, a therapy electrode and a protection circuit of a pulse ablation device as provided by any embodiment of the utility model.

The protection circuit of the pulse ablation equipment provided by the embodiment of the utility model is provided with a sampling module, a comparison module, a logic trigger device, an AND operation device and a control module. Based on the comparison result of the comparison module, double protection of the pulse ablation equipment can be realized. When the detection signal indicates that the energy is abnormal, the logic trigger device is triggered rapidly, and the energy generation module is controlled to stop working in time through the AND operation device; meanwhile, the control module controls the relay module to be turned off based on the detection signal, and cuts off the connection between the energy generating module and the treatment electrode, so that the dual protection of software and hardware of the pulse ablation equipment is formed. The action processes of the two protections are relatively independent, and the action objects are different, if any one of the two protections fails due to faults, the other protection can trigger the protection action, so that the reliability of the protection circuit is effectively improved. Therefore, compared with the prior art, the embodiment of the utility model can improve the reliability of the protection circuit and 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 of a pulse ablation apparatus according to an embodiment of the present utility model;

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

FIG. 3 is a schematic diagram of an energy generating module according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an amplifying and comparing unit according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a logic trigger device and a connection relationship with an operation device according to an embodiment of the present utility model;

Fig. 6 is a schematic diagram of a connection relationship between a control module and a relay module according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a connection relationship between a control module, an operation device and a logic trigger device according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of connection between a processor and each power supply in 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 of pulse ablation equipment, which can realize double protection of the pulse ablation equipment from the angles of software and hardware and ensure that the energy output to a patient is cut off rapidly and reliably under abnormal conditions. Fig. 1 is a schematic structural diagram of a protection circuit of a pulse ablation apparatus according to an embodiment of the present utility model. Referring to fig. 1, in order to facilitate the explanation of the operation of the protection circuit, a brief explanation of the structure related to electrical stimulation in the pulse ablation apparatus is first provided.

Illustratively, as shown in fig. 1, the pulse ablation device includes, in addition to the protection circuit 100, at least: an energy generation module 210, a relay module 220, and a therapy electrode 230. The output of the energy generation module 210 is connected to the therapy electrode 230 through the relay module 220. If the pulse ablation device is a multi-channel device, the relay module 220 may be formed of a multi-channel relay, and the treatment electrode 230 may include a plurality of electrodes corresponding to the respective channels. The working process of the pulse ablation device under the control of the master controller of the pulse ablation device can be as follows: the energy generation module 210 generates a high voltage pulse signal- & gtthe target channel of the relay module 220 is opened- & gtthe electrode of the treatment electrodes 230 corresponding to the target channel releases energy to the patient. Then, the protection circuit provided by the embodiment of the present utility model may stop releasing energy to the patient by controlling the energy generation module 210 to stop outputting or controlling the relay module 220 to be turned off. The protection circuit provided by the embodiment of the utility model is described below.

As shown in fig. 1, the protection circuit includes: a sampling module 110, a comparison module 120, a logic trigger device 130, an AND operation device 140 and a control module 150. Wherein the sampling module 110 is connected between the output of the energy generation module 210 and the relay module 220. The comparison module 120 is electrically connected with the sampling module 110, and the comparison module 120 is connected with the threshold voltage signal VY; the comparison module 120 is configured to generate a detection signal according to the sampling signal output by the sampling module 110 and the threshold voltage signal VY. The input end of the logic trigger device 130 is electrically connected with the output end of the comparison module 120; the logic trigger device 130 is used for generating a trigger signal according to the detection signal. A first input terminal of the operation device 140 is electrically connected with an output terminal of the logic trigger device 130, and an output terminal of the operation device 140 is electrically connected with a control terminal of the energy generation module 210; the and operation module 140 is configured to control whether the energy generation module 210 works according to the trigger signal. An input end of the control module 150 is electrically connected with an output end of the comparison module 120, and a first output end of the control module 150 is electrically connected with a control end of the relay module 220; the control module 150 is configured to control whether the relay module 220 is in a conductive state according to the detection signal.

Illustratively, the control module 150 may be implemented by an original master controller in the pulse ablation device, and the control module 150 is further configured to control the working state of the energy generating module 210 and control whether the relay module 220 is in a conducting state; the threshold voltage signal VY may also be determined by the control module 150 according to the voltage level of the pulse signal provided by the energy generating module 210, and the equivalent impedance of the sampling module 110.

Illustratively, when the energy output by the energy generating module 210 is abnormal, the protection circuit may operate as follows:

the sampling module 110 collects electrical parameters such as voltage or current output by the energy generating module 210, and converts the electrical parameters into a sampling signal for output. The comparison module 120 receives the sampled signal and compares the sampled signal with the threshold voltage signal VY to form a detection signal. The level of the potential of the detection signal can be used for representing the comparison result. Illustratively, when the energy output by the energy generating module 210 is abnormal, the sampling signal is greater than the threshold voltage signal VY, and the detection signal is high (or a potential that can be recognized as a logic 1 by the control module 150 and the logic triggering device 130).

When the comparison module 120 outputs the high-level detection signal, on the one hand, the logic trigger device 130 generates a trigger signal according to the detection signal, the trigger signal is used for controlling the output of the and operation device 140, and the logic trigger device 130 converts the high-level detection signal into the low-level trigger signal for outputting, forcibly controls the and operation device 140 to output the low-level, and controls the energy generation module 210 to stop working, so as to form a re-protection. On the other hand, the control module 150 analyzes the occurrence of the energy abnormality based on the high potential of the detection signal, issues a turn-off command to the control end of the relay module 220, controls the whole relay module 220 to be turned off, cuts off the connection between the energy generating module 210 and the therapy electrode 230, forms another re-protection, and further ensures the safety of the patient.

The logic trigger device 130 may be configured by a logic gate circuit and a trigger, and the and operation device 140 may be configured by a logic gate circuit, and a hardware protection for the pulse ablation device may be configured by the logic trigger device 130 and the and operation device 140, where a response time of the hardware protection is in microsecond level, so that a patient's safety may be effectively and timely protected. The control module 150 may be composed of a processor and necessary peripheral circuits thereof, and software protection for the pulse ablation device may be formed by the control module 150, and the software protection and the hardware protection are combined to form dual protection for the software and the hardware of the pulse ablation device, so as to consider timeliness and reliability of protection.

In the protection circuit of the pulse ablation device provided by the embodiment of the utility model, a sampling module 110, a comparison module 120, a logic trigger device 130, an AND operation device 140 and a control module 150 are arranged. Based on the comparison result of the comparison module 120, dual protection of the pulse ablation device may be achieved. When the detection signal indicates an energy abnormality, the logic trigger device 130 is rapidly triggered, and the energy generation module 210 is timely controlled to stop working by the and operation device 140. Meanwhile, the control module 150 controls the relay module 220 to be turned off based on the detection signal, and cuts off the connection between the energy generating module 210 and the treatment electrode 230, thereby forming dual protection of the software and hardware of the pulse ablation device. The action processes of the two protections are relatively independent, and the action objects are different, if any one of the two protections fails due to faults, the other protection can trigger the protection action, so that the reliability of the protection circuit is effectively improved. Therefore, compared with the prior art, the embodiment of the utility model can improve the reliability of the protection circuit and the safety of the pulse ablation equipment.

The above embodiments exemplarily give protection principles of the protection circuit, and specific configurations that may be provided in the protection circuit are described below, but the present utility model is not limited thereto.

Fig. 2 is a schematic structural diagram of a protection circuit of another pulse ablation device according to an embodiment of the present utility model. Referring to fig. 2, the output of the energy generating module 210 may optionally include: a first output 21 and a second output 22. The relay module 220 includes: a first multi-channel relay 221 and a second multi-channel relay 222. The therapeutic electrode includes: at least one electrode pair, each electrode pair comprising a first electrode E1 and a second electrode E2. The sampling module 110 includes: a first sampling resistor RS1 and a second sampling resistor RS2. The first output end 21 of the energy generating module 210 is electrically connected to a first end of the first sampling resistor RS1, a second end of the first sampling resistor RS1 is electrically connected to the first multi-channel relay 221, and each first electrode E1 is correspondingly connected to an output end of each channel of the first multi-channel relay 221. The second output end 22 of the energy generating module 210 is electrically connected to the first end of the second sampling resistor RS2, the second end of the second sampling resistor RS2 is electrically connected to the second multi-channel relay 222, and each second electrode E2 is correspondingly connected to the output end of each channel of the second multi-channel relay 222. In fig. 2, 4 electrode pairs are exemplarily shown, but not limiting to the present utility model, the specific number of electrode pairs may be configured according to actual needs.

The comparison module 120 includes: a first amplification comparing unit 121 and a second amplification comparing unit 122; the threshold voltage signal includes: a first threshold voltage signal V1 and a second threshold voltage signal V2. A first end of the first amplification comparing unit 121 is electrically connected to a first end of the first sampling resistor RS1, a second end of the first amplification comparing unit 121 is electrically connected to a second end of the first sampling resistor RS1, and a reference end of the first amplification comparing unit 121 is connected to the first threshold voltage signal V1. A first end of the second amplification comparison unit 122 is electrically connected with a first end of the second sampling resistor RS2, a second end of the second amplification comparison unit 122 is electrically connected with a second end of the second sampling resistor RS2, and a reference end of the second amplification comparison unit 122 is connected with a second threshold voltage signal V2; the output of the first amplification comparing unit 121 and the output of the second amplification comparing unit 122 together constitute the output of the comparing module 120.

The first sampling resistor RS1 and the second sampling resistor RS2 may be implemented by single resistor or multiple resistors connected in series and parallel, and may be specifically set according to practical requirements, which is not limited herein. In order to avoid the influence of the access of the sampling resistor on the normal operation of the equipment, the resistance value of the sampling resistor is usually smaller, so that the voltage difference between the two ends of the sampling resistor is smaller, and therefore the voltage difference between the two ends of the sampling resistor can be amplified in the amplifying and comparing unit and then compared with the corresponding threshold voltage signal, so that the accuracy of a comparison result is ensured. The first threshold voltage signal V1 may be determined according to an equivalent resistance value of the first sampling resistor RS1, a safe current upper limit threshold value when the pulse ablation device works normally, and an amplification factor in the first amplification comparing unit 121; similarly, the second threshold voltage signal V2 may be determined according to the equivalent resistance of the second sampling resistor RS2, the upper limit threshold of the safe current when the pulse ablation apparatus is operating normally, and the amplification factor in the second amplification comparing unit 122; the first threshold voltage signal V1 and the second threshold voltage signal V2 may be the same or different. When the voltage difference between two ends of the sampling resistor is amplified and is larger than the corresponding threshold voltage signal, the corresponding amplifying comparison unit can output high potential, otherwise, low potential is output. When the first amplification comparing unit 121 and/or the second amplification comparing unit 122 outputs a high potential, it indicates that the output energy is too large, risking injuring the patient.

With continued reference to fig. 2, optionally, the logic triggering device 130 includes, based on the embodiments described above: nor gate 131 and monostable flip-flop 132. The input end of the nor gate 131 is used as the input end of the logic trigger device 130 and is respectively connected with the output end of each amplifying and comparing unit; the output of nor gate 131 is electrically connected to the input of monostable 132, the output of monostable 132 being the output of logic trigger device 130, and to the operational device 140.

In this embodiment, the nor gate 131 and the monostable flip-flop 132 are used to form the logic trigger device 130, and when any amplifying and comparing unit outputs a high potential, the high potential can be recognized as a logic 1 signal by the nor gate 131, so that the nor gate 131 outputs a logic 0 signal, and the monostable flip-flop 132 is triggered and outputs a logic 0 signal. When a logic 0 signal is input to the and operation device 140, the and operation device 140 may be controlled to output a logic 0 signal (low potential), thereby controlling the power generation module 210 to stop operating.

In the protection circuit shown in fig. 2, the first sampling resistor RS1 and the second sampling resistor RS2 are load-end cross sampling resistors. Each amplifying and comparing unit amplifies the current signal flowing through the sampling resistor and converts the current signal into a sampling voltage, then compares the sampling voltage with a corresponding threshold voltage signal, when any path of sampling voltage is higher than the threshold voltage signal, the corresponding amplifying and comparing unit outputs a high potential, and the high potential triggers the monostable trigger 132 through the NOR gate 131 to enable the AND operation device 140 to control the energy generating module 210 to stop working, and the hardware protection response time is microsecond, so that the safety of a patient is ensured. And the control module 150 performs software protection, and the output signals of the amplifying and comparing units are transmitted to the control module 150 while triggering hardware protection, and when any amplifying and comparing unit outputs high potential, the control module 150 controls all channels of the two multi-channel relays to be turned off, so that the output of high voltage is cut off. By the double protection of hardware and software, the patient can be effectively protected from being hurt during abnormal output of energy in the single fault.

Fig. 3 is a schematic structural diagram of an energy generating module according to an embodiment of the present utility model. Referring to fig. 3, the energy generation module 210 is illustratively comprised of an H-bridge circuit. Specifically, the energy generation module 210 includes: transistors Q1-Q6. A first pole of the transistor Q5 is connected with a first power supply end, connected with a first power supply signal HV1, and a control pole of the transistor Q5 is connected with a control signal A1; the first pole of the transistor Q6 is electrically connected to the second power supply terminal, and is connected to the second power supply signal HV2, and the control pole of the transistor Q6 is connected to the control signal A3. The transistors Q1 and Q2 are connected in series between the second pole of the transistor Q5 and the second pole of the transistor Q6, and a connection node between the transistors Q1 and Q2 is used as a first output end 21 of the energy generating module, and is electrically connected with one end of the first sampling resistor RS1, and a contact P1 is led out from the other end of the first sampling resistor RS1 and is used for being electrically connected with the relay module. And, transistors Q3 and Q4 are connected in series between the second pole of transistor Q5 and the second pole of transistor Q6, the connection node between transistors Q3 and Q4 serves as the second output 22 of the energy generation module, and is electrically connected to one end of the second sampling resistor RS2, and the other end of the second sampling resistor RS2 is led out of the contact P2 for electrical connection with the relay module. The first power supply end and the second power supply end together form a first power supply end of the energy generation module, the first power supply signal HV1 can be a high-voltage positive electrode signal provided by a therapeutic power supply, and the second power supply signal HV2 can be a high-voltage negative electrode signal provided by the therapeutic power supply.

Further, since the therapeutic power supply provides a higher voltage power signal, the energy generating module 210 may further include a second power supply terminal for electrically connecting with the test power supply in order to test the performance of the H-bridge circuit before use. Wherein the test power supply provides a lower supply voltage than the therapeutic power supply. Specifically, transistors Q7 and Q8 are also included in the energy generation module 210. The first pole of the transistor Q7 is connected with a low-voltage positive electrode signal LV1 of the test power supply, the control pole is connected with a control signal A2, and the second pole is electrically connected with the second pole of the transistor Q5; the first pole of the transistor Q8 is connected to the low voltage negative signal LV2 of the test power supply, the control pole is connected to the control signal A4, and the second pole is electrically connected to the second pole of the transistor Q6.

Based on the above embodiments, optionally, the control module 150 may be further electrically connected to a therapeutic power supply and a test power supply, so as to control the therapeutic power supply and the test power supply to stop supplying power while the control relay module 220 is turned off when a fault occurs, and cut off the energy source of the energy generating module 210, thereby further ensuring the reliability of protection.

In the energy generation module 210, the control signals A1-A4 form a power control terminal of the energy generation module 210, and the energy source is selected by controlling the on-off of the transistors Q5-Q8. The control signals B1-B4 form the pulse control terminals of the energy generation module 210, and the direction of the current applied to the patient is determined by controlling the on-off of the transistors Q1-Q4. Each transistor may be an IGBT transistor, for example.

With reference to fig. 2 and fig. 3, further, on the basis of the foregoing embodiments, the comparing module 120 further includes: a third amplification comparing unit 123 and a fourth amplification comparing unit 124; the threshold voltage signal further comprises: a third threshold voltage signal V3 and a fourth threshold voltage signal V4. The first end of the third amplification comparing unit 123 is electrically connected to the first end of the first sampling resistor RS1, the second end of the third amplification comparing unit 123 is electrically connected to the second end of the first sampling resistor RS1, and the reference end of the third amplification comparing unit 123 is connected to the third threshold voltage signal V3. The first end of the fourth amplification comparison unit 124 is electrically connected with the first end of the second sampling resistor RS2, the second end of the fourth amplification comparison unit 124 is electrically connected with the second end of the second sampling resistor RS2, and the reference end of the fourth amplification comparison unit 124 is connected with a fourth threshold voltage signal V4; the output of the first amplification comparing unit 121, the output of the second amplification comparing unit 122, the output of the third amplification comparing unit 123 and the output of the fourth amplification comparing unit 124 together constitute the output of the comparing module 120.

That is, the two ends of the first sampling resistor RS1 are connected to the first amplifying and comparing unit 121 and the third amplifying and comparing unit 123, the first amplifying and comparing unit 121 operates in the treatment process, the third amplifying and comparing unit 123 operates in the test process, and the potential values of the first threshold voltage signal V1 and the third threshold voltage signal V3 are different due to the different voltage levels of the treatment power supply and the test power supply, and the amplification factors in the first amplifying and comparing unit 121 and the third amplifying and comparing unit 123 are different. And, two ends of the second sampling resistor RS2 are connected to the second amplifying and comparing unit 122 and the fourth amplifying and comparing unit 124, the second amplifying and comparing unit 122 works in the treatment process, the fourth amplifying and comparing unit 124 works in the test process, and because the voltage levels of the treatment power supply and the test power supply are different, the amplification factors in the second amplifying and comparing unit 122 and the fourth amplifying and comparing unit 124 are different, and the potential values of the second threshold voltage signal V2 and the fourth threshold voltage signal V4 are also different.

Alternatively, the first amplification comparing unit 121, the second amplification comparing unit 122, the third amplification comparing unit 123, and the fourth amplification comparing unit 124 are amplification comparing units having the same structure, and the four are different only in the types or parameters of the internal elements. Next, the structure of the amplification comparing unit will be described with reference to fig. 4.

Fig. 4 is a schematic structural diagram of an amplifying and comparing unit according to an embodiment of the present utility model. Referring to fig. 4, in one embodiment, optionally, the amplification comparing unit includes: the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the amplifier U1, the first comparator U2 and the second comparator U3.

Taking the first amplification comparing unit as an example, a first end of the first resistor R1 is used as a first end of the amplification comparing unit and is electrically connected with a first end of the first sampling resistor RS1 (i.e. a first output end 21 of the energy generating module); the second end of the first resistor R1 is respectively and electrically connected with the negative input end of the amplifier U1 and the first end of the second resistor R2, the second end of the second resistor R2 is respectively and electrically connected with the first output end of the amplifier U1 and the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is electrically connected with the positive output end of the first comparator U2; the first end of the third resistor R3 is used as the second end of the amplifying and comparing unit and is electrically connected with the second end (i.e. the contact point P1) of the first sampling resistor RS1, the second end of the third resistor R3 is respectively electrically connected with the positive input end of the amplifier U1 and the first end of the fourth resistor R4, the second end of the fourth resistor R4 is respectively electrically connected with the second output end of the amplifier U1 and the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is electrically connected with the positive output end of the second comparator U3. The negative input end of the first comparator U2 and the negative input end of the second comparator U3 are used as reference ends of the amplifying and comparing unit together, and are connected with a first threshold voltage signal V1; the output terminal of the first comparator U2 outputs a first output signal OUT1, the output terminal of the second comparator U3 outputs a second output signal OUT2, and the output terminal of the first comparator U2 and the output terminal of the second comparator U3 are commonly used as the output terminal of the amplifying and comparing unit.

In this embodiment, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the amplifier U1 form a differential amplifier, and the amplification factor of the differential amplifier can be adjusted by adjusting the resistance of each resistor. The two output signals Vout1 and Vout2 of the differential amplifier are inverted signals. As can be seen from fig. 3, when the transistors Q1 and Q4 are turned on, the current flows from the first output terminal 21 to the junction P1, and the potential of the first output terminal 21 is higher than the potential of the junction P1; when the transistors Q2 and Q3 are turned on, the current flows from the junction P1 to the first output terminal 21, and the potential of the first output terminal 21 is lower than the potential of the junction P1. Therefore, at the same time, one of the two output signals Vout1 and Vout2 of the differential amplifier is at a high potential, but which output signal is at a high potential is not fixed, so that the two comparators are provided, so that when the high potential of any one of the output signals is higher than the threshold voltage signal, the corresponding comparator can output a logic 1 signal to correctly control the output of the logic trigger device. Illustratively, both comparators may be voltage comparators.

Fig. 5 is a schematic diagram of a logic trigger device and a connection relationship with an operation device according to an embodiment of the present utility model. Referring to fig. 2, 4 and 5, each of the amplifying and comparing units in fig. 2 has the same structure as that in fig. 4, and then the four amplifying and comparing units include eight output terminals, respectively OUT1 to OUT8, electrically connected to the output terminal of the nor gate 131.

In combination with fig. 3 and 5, in one embodiment, optionally, the and operation device includes: a first and gate 141 and a second and gate 142. The first and gate 141 corresponds to a power control terminal of the energy generating module, and includes four and units, wherein a first input terminal (i.e., 1B-4B) of each and unit is electrically connected to an output terminal of the logic triggering device 130, and output terminals (i.e., 1Y-4Y) of each and unit are connected to control terminals A1-A4 of the energy generating module in a one-to-one correspondence. The second AND gate 142 corresponds to the pulse control end of the energy generation module, and includes four AND units, wherein the first input end (i.e., 5B-8B) of each AND unit is electrically connected to the output end of the logic trigger device 130, and the output end (i.e., 5Y-8Y) of each AND unit is connected to the control ends B1-B4 of the energy generation module in a one-to-one correspondence. In this way, the off control of all transistors of the energy generating module can be reliably achieved.

Fig. 6 is a schematic diagram of a connection relationship between a control module and a relay module according to an embodiment of the present utility model. Referring to fig. 6, in one embodiment, optionally, the control module 150 includes: a processor 151 and a spacer chip 152. An input end of the processor 151 is electrically connected to an output end of the comparison module 120, a first output end of the processor 151 is electrically connected to an input end of the isolation chip 152, and an output end of the isolation chip 152 is electrically connected to a control end of the relay module 220. This allows electromagnetic isolation of the processor 151 from its back-end circuitry, protecting the processor 151 from interference and damage by the back-end circuitry.

Specifically, the processor 151 may include two first output terminals respectively corresponding to the first and second

multi-channel relays

221 and 222, and the isolation chip 152 includes two input terminals and two output terminals, respectively. The first multi-channel relay 221 may include a coil J1 and a contact K1, and the second multi-channel relay 222 may include a coil J2 and a contact K2; the output end of the energy generation module is connected with the treatment electrode through contacts of the relay, and the number of the contacts of the relay can be set according to the number of channels of the relay. After the control signal output by the processor 151 passes through the isolation chip 152, the relay coil is controlled to be powered off, so that each contact of the relay is controlled to be disconnected. Illustratively, the processor 151 may be configured as a single chip, and the isolation chip 152 may be a magnetic isolation chip.

Optionally, the control module 150 is further connected to the computing device 140, and the control module 150 and the logic trigger device 130 are respectively connected to different input terminals of the computing device. In this way, when the output energy of the pulse ablation device is too high, the logic trigger device 130 outputs a logic 0 signal, and the control module 150 also outputs a logic 0 signal, so that the and operation device 140 can output a low potential at the moment, and the energy generation module 210 can be reliably controlled to stop working.

Specifically, referring to fig. 7, illustratively, the connection relationship of the control module 150, with the computing device 140 and the logic triggering device 130 may be: the output of the monostable flip-flop 132 in the logic flip-flop 130 is connected to a first input (i.e., 1B-8B) of each and cell in each and gate in the and-gate device 140. The processor 151 in the control module 150 further includes second output terminals, and the number of the second output terminals is the same as the number of the second input terminals of each and unit in each and gate in the and operation device 140, and is connected in a one-to-one correspondence. Illustratively, processor 151 includes 8 second outputs (IO 1-IO8, respectively) that are electrically connected to the second outputs (i.e., 1A-8A) of each AND cell in turn in first AND gate 141 and second AND gate 142.

Accordingly, the operation of the and operation device 140 may be: when the pulse ablation device is operating normally, the monostable trigger 132 outputs a logic 1 signal, so that the signal output from the second output terminal of the processor 151 determines the output of two and gates, and accordingly, the operating state of the energy generating module 210 can be controlled, that is, the signal output from the second output terminal of the processor 151 determines the output signal of each and unit, and the output signal of each and unit controls the on-off state of each transistor in the energy generating module 210. When the output energy of the pulse ablation device is too high, on the basis that the monostable trigger 132 outputs a logic 0 signal, each second output end of the processor 151 can also output a logic 0 signal, so that all AND units can output logic 0 signals, and the energy generation module 210 can be reliably controlled to stop working.

Fig. 8 is a schematic diagram of connection between a processor and each power supply in a pulse ablation device according to an embodiment of the present utility model. Referring to fig. 8, in addition to the above embodiments, the processor 151 may further include a third output terminal, which is electrically connected to the therapeutic power supply 310 and the test power supply 320, respectively, and the processor 151 is further configured to output a power state control signal through the third output terminal when the output energy of the pulse ablation device is too high, so as to control the therapeutic power supply 310 and the test power supply 320 to stop supplying power, so as to ensure that the control energy generation module 210 stops working.

With continued reference to fig. 8, further, the third output of the processor 151 may also be connected to other power sources (e.g., a relay power source 330 for powering the respective multi-channel relays, etc.) in the pulse ablation device in addition to the power source of the processor 151. Therefore, when a fault occurs, the power supply of other functional modules is cut off in time on the basis of ensuring the normal operation of the protection circuit, so that the pulse ablation equipment can not release energy to a patient any more, and the equipment safety is improved.

On the basis of the above embodiments, optionally, the protection circuit further includes: an upper computer; the processor 151 further includes a fourth output terminal electrically connected to the host computer. When the processor 151 analyzes that the fault occurs, the processor can also send a command to the upper computer, and the interface of the upper computer alarms to remind medical staff of equipment fault.

In this embodiment, the control module 150 uses the processor 151 as a control core, the signal output by the comparison module 120 can be given to the interrupt pin of the processor 151, the processor 151 responds to the interrupt signal quickly, and turns off the power supply of the H-bridge driving circuit, and simultaneously, after magnetic isolation, controls each relay coil to turn off, so as to cut off the output of high voltage; and the processor 151 sends a command to the upper computer at the same time, so that the upper computer alarms, and multiple protection of the software layer is realized.

In summary, the protection circuit provided by the embodiment of the utility model can realize dual protection of software and hardware, ensure that the hardware circuit rapidly turns off the energy source under abnormal conditions, and simultaneously, the software processes abnormal states, prompts user information and turns off the energy source again, thereby ensuring the safety of patients. The software and hardware dual protection mechanism can give consideration to timeliness and reliability of protection.

The embodiment of the utility model also provides pulse ablation equipment, which comprises the protection circuit provided by any embodiment of the utility model and has corresponding beneficial effects. Illustratively, the pulse ablation device further comprises: the device comprises an energy generation module, a relay module, a treatment electrode, a treatment power supply and a test power supply. The specific connection manner and the action process of each functional module can be referred to the description in each specific embodiment of the protection circuit, and the repetition is not repeated here.

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 a pulse ablation device, the pulse ablation device comprising: the energy generation module, the relay module and the treatment electrode; the output end of the energy generation module is connected with the treatment electrode through the relay module;

the protection circuit includes:

The first input end of the AND operation device is electrically connected with the output end of the logic trigger device, and the output end of the AND operation device is electrically connected with the control end of the energy generation module; the AND operation device is used for controlling whether the energy generation module works according to the trigger signal;

2. The protection circuit of the pulse ablation apparatus according to claim 1, wherein the output of the energy generation module comprises: a first output terminal and a second output terminal; the relay module includes: a first multi-channel relay and a second multi-channel relay; the therapy electrode includes: at least one electrode pair, each electrode pair comprising a first electrode and a second electrode;

3. The protection circuit of the pulse ablation apparatus of claim 2, wherein the energy generation module further comprises a first power supply terminal and a second power supply terminal, the first power supply terminal being electrically connected to a therapeutic power supply, the second power supply terminal being electrically connected to a test power supply; the therapeutic power supply is different from the power supply voltage provided by the test power supply;

4. The protection circuit of the pulse ablation apparatus according to claim 3, wherein the first amplification comparing unit, the second amplification comparing unit, the third amplification comparing unit, and the fourth amplification comparing unit are amplification comparing units having the same structure;

5. The protection circuit of a pulse ablation apparatus according to claim 1, wherein the logic trigger device comprises: nor gates and monostable flip-flops;

6. The protection circuit of the pulse ablation apparatus according to claim 1, wherein the control terminal of the energy generation module comprises: a power supply control end and a pulse control end;

the AND operation device includes: a first and a second and gate;

7. The protection circuit of the pulse ablation apparatus of claim 1, wherein the control module comprises: a processor and an isolation chip;

8. The protection circuit of the pulse ablation apparatus according to claim 7, wherein the second output of the processor is electrically connected to the second input of the and-operation device;

9. The protection circuit of the pulse ablation apparatus of claim 7, further comprising: an upper computer; and a fourth output end of the processor is electrically connected with the upper computer.

10. A pulse ablation device, comprising: an energy generation module, a relay module, a therapy electrode and a protection circuit of the pulse ablation device according to any of claims 1-9.