CN214907985U - Steam ablation apparatus - Google Patents
Steam ablation apparatus Download PDFInfo
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- CN214907985U CN214907985U CN202023327389.0U CN202023327389U CN214907985U CN 214907985 U CN214907985 U CN 214907985U CN 202023327389 U CN202023327389 U CN 202023327389U CN 214907985 U CN214907985 U CN 214907985U
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Abstract
The utility model provides a steam ablation device, which comprises a handle, a heating component, a power supply module, an injection part and a processing circuit; the handle is internally provided with a cavity and a nozzle connected to the cavity, the heating part is arranged in the cavity, the power supply module is electrically connected to the heating part to supply power to the heating part so as to heat the heating part, and the injection part is connected to the cavity to inject water into the cavity; the processing circuit comprises a control module and a current measuring module; the current measuring module is electrically connected with the output side of the power supply module so as to monitor component current information of current output to the heating component by the power supply module; the current measurement module is also electrically connected to the control module to send a current measurement signal to the control module that is representative of the component current information.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a steam ablation equipment.
Background
Steam ablation is a new technology for forming high-temperature water vapor and then applying the high-temperature water vapor to a target part in a patient body, and can be used for local tissue inflammatory reaction, injury repair and the like. Steam ablation may be applied to the bronchi, for example, but is not limited thereto.
In the steam ablation equipment, the heater block can be located and hold the chamber, and the power can heat the heater block, then heats, evaporates the water of sending into the appearance chamber, forms steam, however, when controlling processes such as heating, safety protection, lack objective effectual foundation, is difficult to ensure the accuracy and the validity of control.
SUMMERY OF THE UTILITY MODEL
The utility model provides a steam ablation device to solve and lack objective effectual foundation, be difficult to the problem of the accuracy and the validity of guarantee control.
According to the utility model, a steam ablation device is provided, which comprises a handle, a heating component, a power supply module, an injection part and a processing circuit;
the handle is internally provided with a cavity and a nozzle connected to the cavity, the heating part is arranged in the cavity, the power supply module is electrically connected to the heating part to supply power to the heating part so as to heat the heating part, and the injection part is connected to the cavity to inject water into the cavity;
the processing circuit comprises a control module and a current measuring module;
the current measuring module is electrically connected with the output side of the power supply module so as to monitor component current information of current output to the heating component by the power supply module;
the current measurement module is also electrically connected to the control module to send a current measurement signal to the control module that is representative of the component current information.
Compare in the means of not monitoring the electric current of heater block, the utility model discloses an automatic measure of electric current provides accuracy, effectual foundation for the demand of various controls to help the accuracy and the validity of guarantee control, simultaneously, the measuring result of electric current still can be used to provide the foundation to other processings (for example, the control of voltage) outside the protection action.
And simultaneously, the utility model discloses in, because the appearance chamber is located in the handle, water can be heated by the heater block after the chamber is held in the injection portion ration injection entering, the flash evaporation forms steam to from the spout blowout, compare in forming steam in the generator, carry the scheme to the handle again, the utility model discloses can play the positive effect of quick formation steam.
Optionally, the current measuring module includes a converting unit, an input end of the converting unit is electrically connected to an output side of the power supply module, and an output end of the converting unit is electrically connected to the control module, and is configured to convert the current flowing through the heating coil into a voltage and directly or indirectly feed the voltage back to the control module.
In the above alternative, the current is converted into a voltage, enabling efficient feedback of current information.
Optionally, the current measuring module further includes: the differential amplification unit, the voltage sensor and the differential-to-single-ended unit are connected in series;
the first input end of the differential amplification unit and the second input end of the differential amplification unit are respectively electrically connected with the first output end of the conversion unit and the second output end of the conversion unit, and the output end of the differential amplification unit is electrically connected with the input end of the voltage sensor;
a first output end of the voltage sensor is electrically connected with a first input end of the differential-to-single-ended unit, and a second output end of the voltage sensor is electrically connected with a second input end of the differential-to-single-ended unit;
the differential amplification unit is used for carrying out differential processing on the voltages at the two ends of the output side of the conversion unit and amplifying a differential result to obtain a single-ended amplified signal; transmitting the amplified signal to an input side of the voltage sensor;
the voltage sensor is used for converting the amplified signal into a differential signal and transmitting the differential signal to the differential-to-single-ended unit;
the differential-to-single-ended unit is configured to convert the differential signal into a single-ended current measurement signal, and send the single-ended current measurement signal to the control module.
Optionally, the differential amplifying unit includes a first operational amplifier, a first input end of the first operational amplifier is electrically connected to a first output end of the converting unit, a second input end of the first operational amplifier is electrically connected to a second output end of the converting unit, and an output end of the first operational amplifier is electrically connected to an input end of the voltage sensor.
Optionally, the differential amplifying unit further includes a first feedback resistor electrically connected between the second input terminal of the first operational amplifier and the output terminal of the first operational amplifier.
In the scheme, automatic acquisition and feedback of current information are realized, meanwhile, the static working point is effectively stabilized through the symmetry and negative feedback effect of the differential amplification unit on circuit parameters, and meanwhile, the amplified differential mode signal can be used for inhibiting the common mode signal.
Optionally, the current measurement module further includes a filtering unit, a first end of the filtering unit is electrically connected to the output end of the differential amplification unit, and a second end of the filtering unit is electrically connected to the input end of the voltage sensor.
Optionally, the filtering unit includes a filtering resistor and a filtering capacitor,
the first end of the filter resistor is electrically connected with the output end of the differential amplification unit, and the second end of the filter resistor is electrically connected with the input end of the voltage sensor;
the first end of the filter capacitor is electrically connected with the second end of the filter resistor, and the second end of the filter capacitor is electrically connected with the ground.
In the above alternative schemes, interference and attenuation in signal transmission can be reduced by the filtering action of the filtering unit, and the accuracy of signal transmission is guaranteed.
Optionally, the differential-to-single-ended unit includes a second operational amplifier, a first input end of the second operational amplifier is electrically connected to the first output end of the voltage sensor, a second input end of the second operational amplifier is electrically connected to the second output end of the voltage sensor, and an output end of the second operational amplifier is electrically connected to the control module.
Optionally, the differential-to-single-ended unit further includes a first differential resistor, a second differential resistor, and a second feedback resistor,
the first differential resistor is electrically connected between the first output end of the voltage sensor and the first input end of the second operational amplifier;
the second differential resistor is electrically connected between the second output end of the voltage sensor and the second input end of the second operational amplifier;
the second feedback resistor is electrically connected between the second input terminal of the second operational amplifier and the output terminal of the second operational amplifier.
Optionally, the current measuring module further comprises an access resistor,
the access resistor is electrically connected between the second output end of the conversion unit and the second input end of the differential amplification unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a first schematic view of a steam ablation apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of a steam ablation apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a current measurement module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a current measurement module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a switch module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a switch module according to an embodiment of the present invention;
fig. 7 is a schematic connection diagram of the voltage regulation module according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of the voltage regulation module according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a steam ablation apparatus may include: handle 2, heating element 22, power module 12, injection part 14, and first processing circuit 11.
The handle 2, which can be understood as a structure suitable for operation to perform steam injection, may have a cavity 21 and a nozzle 23 connected to the cavity 21, and a valve and a pipeline for controlling the on/off of steam may be provided between the cavity 21 and the nozzle 23.
The heating member 22 is disposed in the cavity 21, and may be understood as a member capable of heating water entering the cavity to generate steam, for example, may include a heating coil, and may further include a heating rod, and any member suitable for heating may be used as the heating member according to the embodiment of the present invention.
Wherein, the power module 12 is electrically connected to the heating component 22 to supply power to the heating component 22, so that the heating component 22 generates heat.
The injection part 14 is connected (may be connected, for example, by a water pipe) to the cavity 22 to inject water into the cavity 22; the injections effected therein may be effected electrically, without excluding manual means. In one embodiment, the injection portion may include, for example, an injection body having an injection cavity, the injection cavity being provided with an injection moving member, and the injection moving member may be connected to an injection motor through a transmission member so as to move along an inner wall of the injection cavity under the driving of the injection motor, so as to inject water in the injection cavity into the inner cavity 22.
The power module 12 may be any module capable of providing power for heating the heating component 22, and further, it may also provide power for the injection part 14 (e.g., an injection motor thereof), and furthermore, the power module 12 may be configured to adjust specific electrical parameters (e.g., voltage, current, power, etc.) of the power provided to the heating component and/or the injection part under the control of the control module (e.g., the control module 11).
A switch module 13 may be disposed between the power module 12 and the heating component 22, and a controlled end of the switch module may be directly or indirectly electrically connected to the control module 111 (e.g., directly electrically connected to the control module 111). Furthermore, whether heating is performed or not can be controlled by controlling the switch module. The switch module 13 may be any device or combination of devices that can be controlled to be turned on and off.
In the illustrated embodiment, the power supply module 12, the switch module 13, the first processing circuit 11, the injection unit 14, and the like may be provided in the case 1, and in other examples, a means of providing them in other structures or in different structures is not excluded. Meanwhile, the embodiment of the present invention does not exclude the possibility that the switch module 13 is disposed on the handle 2.
Among the above scheme, because holding the chamber and locating in the handle, water can be heated by the heater block after the chamber is held in the injection portion ration injection entering, and flash evaporation forms steam to from the spout blowout, compare in forming steam in the generator, carry the scheme to the handle again, the utility model discloses can play the positive effect of quick formation steam.
In the embodiment using the case 1 and the handle 2, the water outlet of the injection part 14 may be connected to the corresponding interface of the handle 2 through a water pipe and further connected to the housing 21, and the circuit structure such as the power module 12 may be connected to the handle through an electric wire, for example, the power module 12 may be connected to one end of the electric wire through the switch module 13 and the corresponding interface, and the other end of the electric wire is connected to the interface on the handle 2 and further connected to the heating part.
Referring to fig. 2, the first processing circuit further includes a current measuring module 113.
The current measuring module 113 is electrically connected to an output side of the power module 12 to measure component current information output from the power module 12 to the heating component 22;
the current measurement module 113 is further electrically connected to the control module 111, and feeds back a current measurement signal representing the component current information to the control module 111.
In the above scheme, the current measuring module can accurately collect and feed back the current information of the component to the control module, thereby providing a basis for further control and/or protection actions.
In a further embodiment, referring to fig. 3, the current measuring module includes a converting unit 1131, a differential amplifying unit 1132, a voltage sensor 1133, and a differential-to-single-ended unit 1134.
An input end of the converting unit 1131 is electrically connected to an output side of the power module 12, and an output end of the converting unit 1131 is electrically connected to the differential amplifying unit 1132, and is configured to convert the current flowing through the heating component 22 into a voltage and output a voltage representing the component current information;
a first input end of the differential amplification unit 1132 and a second input end of the differential amplification unit are electrically connected to a first output end of the conversion unit 1131 and a second output end of the conversion unit 1131, respectively, and an output end of the differential amplification unit 1132 is electrically connected to an input end of the voltage sensor 1133;
the differential amplifying unit 1132 is configured to perform differential processing on the voltages at the two ends of the output side of the converting unit 1131, and amplify a differential result to obtain a single-ended second amplified signal; transmitting the second amplified signal to an input side of the voltage sensor 1133;
a first output terminal of the voltage sensor 1133 is electrically connected to a first input terminal of the differential-to-single-ended unit 1134, and a second output terminal of the voltage sensor 1133 is electrically connected to a second input terminal of the differential-to-single-ended unit 1134;
the voltage sensor 1133 is configured to convert the second amplified signal into a second differential signal, and transmit the second differential signal to the differential-to-single-ended unit 1134;
the differential-to-single-ended unit 1134 is configured to convert the second differential signal into a single-ended current measurement signal, and send the single-ended current measurement signal to the control module 111.
In the scheme, automatic acquisition and feedback of current information are realized, meanwhile, the static working point is effectively stabilized through the symmetry and negative feedback effect of the differential amplification unit on circuit parameters, and meanwhile, the amplified differential mode signal can be used for inhibiting the common mode signal.
Referring to fig. 4, the differential amplifying unit 1132 includes a first operational amplifier N31, a first input terminal of the first operational amplifier N31 is electrically connected to the first output terminal of the converting unit 1131, a second input terminal of the first operational amplifier N31 is electrically connected to the second output terminal of the converting unit 1131, and an output terminal of the first operational amplifier N31 is electrically connected to the input terminal of the voltage sensor 1133.
Further, the differential amplifying unit 1132 further includes a first feedback resistor R32, and the first feedback resistor R32 is electrically connected between the second input terminal of the first operational amplifier N31 and the output terminal of the first operational amplifier N31.
The current measurement module 113 further includes a filtering module 1135, a first end of the filtering module 1135 is electrically connected to the output end of the differential amplification unit 1132, and a second end of the filtering module 1135 is electrically connected to the input end of the voltage sensor 1133.
Still further, the filtering module 1135 includes a filtering resistor R33 and a filtering capacitor C31,
a first end of the filter resistor R33 is electrically connected to the output end of the differential amplifying unit 1132, and a second end of the filter resistor R33 is electrically connected to the input end of the voltage sensor 1133;
the first end of the filter capacitor C31 is electrically connected to the second end of the filter resistor R33, and the second end of the filter capacitor C31 is electrically connected to ground.
Referring to fig. 4, the differential-to-single-ended unit includes a second operational amplifier N32, a first input terminal of the second operational amplifier N32 is electrically connected to the first output terminal of the voltage sensor, a second input terminal of the second operational amplifier N32 is electrically connected to the second output terminal of the voltage sensor 1133, and an output terminal of the second operational amplifier N32 is electrically connected to the control module 111.
Further, the differential-to-single-ended unit 1134 further includes a first differential resistor R37, a second differential resistor R38, and a second feedback resistor R39,
the first differential resistor R37 is electrically connected between the first output terminal of the voltage sensor 1133 and the first input terminal of the second operational amplifier N32;
the second differential resistor R38 is electrically connected between the second output terminal of the voltage sensor 1133 and the second input terminal of the second operational amplifier N32;
the second feedback resistor R39 is electrically connected between the second input terminal of the second operational amplifier N32 and the output terminal of the second operational amplifier N32.
The current measuring module 113 further includes an access resistor R31, and the access resistor R31 is electrically connected between the second output terminal of the converting unit 1131 and the second input terminal of the differential amplifying unit 1132.
In addition, the SHDN terminal (which can be understood as a closed control port) of the voltage sensor 1133 is grounded via the resistor R34, the power supply terminal of the first side of the voltage sensor 1133 is connected to the voltage source and to the capacitor C35, and the power supply terminal of the second side is connected to the voltage source and to the capacitor C33; a capacitor C34 is connected between the two output terminals of the voltage sensor 1133, and the first input terminal of the second operational amplifier N32 is also connected to ground via a resistor R36.
In the above scheme, the conversion unit may sample current changes through a resistor, and convert the current signal into a voltage signal. The actual current variation range may be, for example: 0-30A, sampling and converting the voltage signal into a voltage signal in a range of 0-0.06V through a resistance sampling 2.0m omega circuit, and outputting the voltage signal after amplifying (for example, amplifying by 31.6 times) through a differential amplification unit, wherein the output voltage range can be 0-1.98V, for example. Then, the noise (for example, noise with a frequency above 39.8 Hz) is filtered by a low-pass filter formed by the filter resistor R33 and the filter capacitor C31, and is input to a voltage sensor with isolation (i.e., the voltage sensor 1133). The voltage sensor 1133 may be a single input, differential output, gain-1 voltage converter, which performs the isolation protection function. Then, the signal can be input into a differential-to-single-ended unit composed of a second operational amplifier N32 and the like, the amplification factor of the differential-to-single-ended unit can be 1, the voltage output range of the differential-to-single-ended unit is equal to the voltage input range (0-1.98V) of the previous stage, the differential-to-single-ended unit is input into an ADC pin of the control module, and after the voltage data is read by the ADC, the voltage data can be calculated and converted into current data, so that the coil current information can be obtained.
Referring to fig. 5, the switch module 13 includes a first transistor Q1, a second transistor Q2 and a driving unit 131;
a first terminal of the first transistor Q1 is electrically connected to the positive electrode of the output side of the power module 12, a second terminal of the first transistor Q1 is electrically connected to the first terminal of the heating component 22, a first terminal of the second transistor Q2 is electrically connected to the negative electrode of the output side of the power module 12, and a second terminal of the second transistor Q2 is electrically connected to the second terminal of the heating component 22; the transistor can be, for example, a field effect transistor, a MOS transistor, a triode, etc.
The driving unit 131 is electrically connected to a control module 111, a control terminal (e.g., a gate) of the first transistor Q1, and a control terminal (e.g., a gate) of the second transistor Q2, respectively, for controlling the first transistor Q1 and the second transistor Q2 to be turned on or off simultaneously in response to a switching control signal output by the control module 111.
In addition, the driving unit 131 may also be connected to the control module 111, and further output a switching control signal under the control of the control module 111.
In the above alternative, the control of whether to heat or not can be realized by the simultaneous control of the transistors (e.g., field effect transistors), and at the same time, a certain degree of isolation can be formed between the transistors and the controller by the driving unit.
Further, referring to fig. 6, the driving unit 131 includes a third transistor Q3, an opto-isolator U11, and a transistor driver U12; the transistor can be, for example, a field effect transistor, a MOS transistor, a triode, etc.
A control end (for example, a gate electrode) of the third transistor Q3 is electrically connected to the control module 111, a first end of the third transistor Q3 is electrically connected to the input side of the opto-isolator U11, and a second end of the third transistor Q3 is electrically connected to ground;
the output side of the optocoupler isolator U11 is electrically connected with the input end of the transistor driver U12;
a first output terminal (specifically, a VoutA + terminal) of the transistor driver U12 is electrically connected to the control terminal of the first transistor Q1, a second output terminal (specifically, a VoutA-terminal) of the transistor driver U12 is electrically connected to the second terminal of the first transistor Q1, a third output terminal (specifically, a VoutB + terminal) of the transistor driver U12 is electrically connected to the control terminal of the second transistor Q2, and a fourth output terminal (specifically, a VoutB-terminal) of the transistor driver U12 is electrically connected to the second terminal of the second transistor Q2.
Because the control module is compared with the voltage difference of power module great and in different power domains, consequently need keep apart, for this reason, above alternative can effectively ensure the isolation between controller and the power module through introducing the opto-coupler isolator.
In addition, the control end of the third transistor Q3 is also grounded through a pull-down resistor R13, a resistor R14 is connected between the control end and the second end of the first transistor Q1, a resistor R15 is connected between the control end and the second end of the second transistor Q2, a resistor R11 is further arranged between the control end of the first transistor Q1 and the first output end of the transistor driver U12, and a resistor R12 is further arranged between the control end of the second transistor Q2 and the third output end of the transistor driver U12.
Referring to fig. 7, a controlled terminal of the power module 12 is electrically connected to the control module 111 through a voltage regulating module 118. In the above alternative, the adjustment of the output voltage of the power supply module can be realized by the voltage adjusting module.
Specifically, referring to fig. 8, the voltage regulating module 118 includes: a voltage follower U71, a first input terminal of the voltage follower U71 is electrically connected to the control module 111, a second input terminal of the voltage follower U71 is electrically connected to an output terminal of the voltage follower U71, and an output terminal of the voltage follower U71 is electrically connected to the controlled terminal of the power module 12.
In a further aspect, the voltage regulation module 118 further includes: the voltage follower comprises a first voltage regulating resistor R71 and a second voltage regulating resistor R72, wherein one end of the first voltage regulating resistor R71 is electrically connected with the control module 111, and the other end of the first voltage regulating resistor R71 is electrically connected with a first input end of the voltage follower U71; one end of the second voltage-regulating resistor R72 is electrically connected to the first input end of the voltage follower U71, and the other end of the second voltage-regulating resistor R72 is grounded, wherein the first input end of the voltage follower U71 can be understood as a non-inverting input end thereof.
In the scheme, the voltage regulation circuit can be realized by using a self-contained DAC module in a control module (such as an MCU), the output control voltage range is 0-3.3V, and the voltage regulation circuit can be input to a power supply module to regulate voltage after the driving capability is increased through a following circuit formed by a voltage follower. In one example, the voltage regulation range can be, for example, 2 to 30V. In the case of a constant resistance of the heating element (e.g. heating coil), the higher the voltage of the regulated output, the higher the heating power.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A steam ablation device is characterized by comprising a handle, a heating part, a power supply module, an injection part and a processing circuit;
the handle is internally provided with a cavity and a nozzle connected to the cavity, the heating part is arranged in the cavity, the power supply module is electrically connected to the heating part to supply power to the heating part so as to heat the heating part, and the injection part is connected to the cavity to inject water into the cavity;
the processing circuit comprises a control module and a current measuring module;
the current measuring module is electrically connected with the output side of the power supply module so as to monitor component current information of current output to the heating component by the power supply module;
the current measurement module is also electrically connected to the control module to send a current measurement signal to the control module that is representative of the component current information.
2. The steam ablation device of claim 1, wherein the current measuring module comprises a converting unit, an input end of the converting unit is electrically connected with an output side of the power supply module, and an output end of the converting unit is electrically connected with the control module and is used for converting the current flowing through the heating coil into voltage and feeding back the voltage to the control module directly or indirectly.
3. The steam ablation device of claim 2, wherein the current measurement module further comprises: the differential amplification unit, the voltage sensor and the differential-to-single-ended unit are connected in series;
the first input end of the differential amplification unit and the second input end of the differential amplification unit are respectively electrically connected with the first output end of the conversion unit and the second output end of the conversion unit, and the output end of the differential amplification unit is electrically connected with the input end of the voltage sensor;
a first output end of the voltage sensor is electrically connected with a first input end of the differential-to-single-ended unit, and a second output end of the voltage sensor is electrically connected with a second input end of the differential-to-single-ended unit;
the differential amplification unit is used for carrying out differential processing on the voltages at the two ends of the output side of the conversion unit and amplifying a differential result to obtain a single-ended amplified signal; transmitting the amplified signal to an input side of the voltage sensor;
the voltage sensor is used for converting the amplified signal into a differential signal and transmitting the differential signal to the differential-to-single-ended unit;
the differential-to-single-ended unit is configured to convert the differential signal into a single-ended current measurement signal, and send the single-ended current measurement signal to the control module.
4. The steam ablation device of claim 3, wherein the differential amplification unit comprises a first operational amplifier, a first input of the first operational amplifier is electrically connected to a first output of the conversion unit, a second input of the first operational amplifier is electrically connected to a second output of the conversion unit, and an output of the first operational amplifier is electrically connected to an input of the voltage sensor.
5. The steam ablation device of claim 4, wherein the differential amplification unit further comprises a first feedback resistor electrically connected between the second input of the first operational amplifier and the output of the first operational amplifier.
6. The steam ablation device of claim 3, wherein the current measurement module further comprises a filter unit, a first end of the filter unit is electrically connected to the output end of the differential amplification unit, and a second end of the filter unit is electrically connected to the input end of the voltage sensor.
7. The steam ablation device of claim 6, wherein the filter unit includes a filter resistance and a filter capacitance,
the first end of the filter resistor is electrically connected with the output end of the differential amplification unit, and the second end of the filter resistor is electrically connected with the input end of the voltage sensor;
the first end of the filter capacitor is electrically connected with the second end of the filter resistor, and the second end of the filter capacitor is electrically connected with the ground.
8. The steam ablation device of claim 3, wherein the differential-to-single ended unit comprises a second operational amplifier, a first input of the second operational amplifier is electrically connected to the first output of the voltage sensor, a second input of the second operational amplifier is electrically connected to the second output of the voltage sensor, and an output of the second operational amplifier is electrically connected to the control module.
9. The steam ablation device of claim 8, wherein the differential to single ended unit further comprises a first differential resistor, a second feedback resistor,
the first differential resistor is electrically connected between the first output end of the voltage sensor and the first input end of the second operational amplifier;
the second differential resistor is electrically connected between the second output end of the voltage sensor and the second input end of the second operational amplifier;
the second feedback resistor is electrically connected between the second input terminal of the second operational amplifier and the output terminal of the second operational amplifier.
10. The steam ablation device of claim 3, wherein the current measurement module further comprises an on-resistance,
the access resistor is electrically connected between the second output end of the conversion unit and the second input end of the differential amplification unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023327389.0U CN214907985U (en) | 2020-12-31 | 2020-12-31 | Steam ablation apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023327389.0U CN214907985U (en) | 2020-12-31 | 2020-12-31 | Steam ablation apparatus |
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| CN214907985U true CN214907985U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115005967A (en) * | 2022-08-10 | 2022-09-06 | 浙江伽奈维医疗科技有限公司 | Steam ablation gun, steam ablation equipment and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115005967A (en) * | 2022-08-10 | 2022-09-06 | 浙江伽奈维医疗科技有限公司 | Steam ablation gun, steam ablation equipment and control method |
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