CN220495038U - Multifunctional pneumoperitoneum machine monitoring device - Google Patents
Multifunctional pneumoperitoneum machine monitoring device Download PDFInfo
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- CN220495038U CN220495038U CN202321561236.3U CN202321561236U CN220495038U CN 220495038 U CN220495038 U CN 220495038U CN 202321561236 U CN202321561236 U CN 202321561236U CN 220495038 U CN220495038 U CN 220495038U
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- 208000005646 Pneumoperitoneum Diseases 0.000 title claims abstract description 66
- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 93
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 191
- 230000002457 bidirectional effect Effects 0.000 claims description 30
- 238000005070 sampling Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 2
- 230000006870 function Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
- 230000003993 interaction Effects 0.000 description 6
- 238000004590 computer program Methods 0.000 description 4
- 210000000683 abdominal cavity Anatomy 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 210000003815 abdominal wall Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006012 detection of carbon dioxide Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000002357 laparoscopic surgery Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a multifunctional pneumoperitoneum machine monitoring device which comprises a main control circuit, a pressure detection circuit, a flow detection circuit and an indoor carbon dioxide content detection circuit, wherein the main control circuit is connected with the pressure detection circuit; the pressure detection circuit is arranged at the air outlet of the air passage of the pneumoperitoneum machine, the flow detection circuit is arranged in the air passage of the pneumoperitoneum machine, and the indoor carbon dioxide content detection circuit is arranged in the use environment of the pneumoperitoneum machine; the pressure detection circuit, the flow detection circuit and the indoor carbon dioxide content detection circuit are all electrically connected with the main control circuit. The utility model can simultaneously detect the gas pressure and the gas flow in the gas circuit of the pneumoperitoneum machine and the carbon dioxide content in the use environment of the pneumoperitoneum machine, has diversified detection functions and has high accuracy of comprehensively monitoring the working state of the pneumoperitoneum machine.
Description
Technical Field
The utility model relates to the field of medical equipment, in particular to a multifunctional pneumoperitoneum machine monitoring device.
Background
Laparoscopic surgery requires the creation of an operative space in the abdominal cavity, which requires the infusion of a gas (commonly CO 2 Gas) to raise the anterior abdominal wall for good vision and for operation with the instrument. Pneumoperitoneum machines are devices necessary for establishing and maintaining pneumoperitoneum.
In the use process of the pneumoperitoneum machine, in order to ensure the safety of the poured gas after entering the human body, the gas path and the use environment of the pneumoperitoneum machine need to be monitored and fed back in real time so as to realize the use safety of gas conveying. Thus, a monitoring device is typically provided for pneumoperitoneum machines.
However, the detection items of the current monitoring device are single, or the pressure in the gas path is detected independently, or the flow in the gas path is detected independently, and the factors influencing the safety of the gas path of the pneumoperitoneum machine are various, and the monitoring and evaluation of the various factors are required to be integrated, so that the monitoring of the pneumoperitoneum machine cannot be accurately realized by the current monitoring device, and the accuracy is low.
Disclosure of Invention
In view of the above, the utility model provides a multifunctional pneumoperitoneum machine monitoring device to solve the problems of single function and lower accuracy of the existing monitoring device.
The utility model provides a multifunctional pneumoperitoneum machine monitoring device which comprises a main control circuit, an output pressure detection circuit, a flow detection circuit, an input pressure detection circuit and an indoor carbon dioxide content detection circuit, wherein the main control circuit is connected with the output pressure detection circuit;
the output pressure detection circuit is arranged at the air outlet of the air passage of the pneumoperitoneum machine, the input pressure detection circuit is arranged at the air inlet of the air passage of the pneumoperitoneum machine, the flow detection circuit is arranged in the air passage of the pneumoperitoneum machine, and the indoor carbon dioxide content detection circuit is arranged in the use environment of the pneumoperitoneum machine;
The output pressure detection circuit, the flow detection circuit, the input pressure detection circuit and the indoor carbon dioxide content detection circuit are all electrically connected with the main control circuit.
Optionally, the pressure detection circuit comprises a first power supply electronic circuit and two identical pressure acquisition sub-circuits;
the input ends of the two pressure acquisition sub-circuits are electrically connected with the output end of the first power supply circuit, and the output ends of the two pressure acquisition sub-circuits are electrically connected with the main control circuit.
Optionally, the first power supply electronic circuit includes a first dual-channel operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor;
the positive power supply pin +VS of the first dual-channel operational amplifier is electrically connected with the +12V power supply end through the first resistor, the first end of the second capacitor is connected to the common connection end between the positive power supply pin +VS of the first dual-channel operational amplifier and the first resistor, the second end of the second capacitor is grounded, and the negative power supply pin-VS of the first dual-channel operational amplifier is grounded;
The first positive electrode signal input pin +IN/A and the second positive electrode signal input pin +IN/B of the first dual-channel operational amplifier are electrically connected with the +3V power supply end; the first end of the sixth capacitor is connected to a common connection end between a first positive signal input pin +IN/A of the first dual-channel operational amplifier and the +3V power supply end, and the second end of the sixth capacitor is grounded; the first end of the seventh capacitor is connected to a common connection end between the second positive signal input pin +IN/B of the first dual-channel operational amplifier and the +3V power supply end, and the second end of the seventh capacitor is grounded;
the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier is electrically connected with the input end of the first path of pressure acquisition subcircuit, and the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier is grounded through the fourth resistor; the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier is electrically connected with the input end of the second pressure acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier is grounded through the fifth resistor;
the first output pin OUT/A of the first dual-channel operational amplifier is grounded through the second resistor and the first capacitor IN sequence, the input end of the first path of pressure acquisition subcircuit is also connected to a common connection end between the second resistor and the first capacitor, the first end of the fourth capacitor is connected to the common connection end between the first output pin OUT/A of the first dual-channel operational amplifier and the second resistor, and the second end of the fourth capacitor is connected to the common connection end between the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier and the fourth resistor;
The second output pin OUT/B of the first dual-channel operational amplifier sequentially passes through the third resistor and the third capacitor to be grounded, the input end of the second pressure acquisition sub-circuit is further connected to a common connection end between the third resistor and the third capacitor, the first end of the fifth capacitor is connected to the common connection end between the second output pin OUT/B of the first dual-channel operational amplifier and the third resistor, and the second end of the fifth capacitor is connected to the common connection end between the second negative electrode signal input pin IN/B of the first dual-channel operational amplifier and the fifth resistor.
Optionally, the two pressure acquisition subcircuits each include a first pressure sensor, a first operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a first bidirectional diode;
in each pressure acquisition sub-circuit, a positive electrode pin LEXC+ of a power supply circuit and a negative electrode pin LEXC-of the power supply circuit of the first pressure sensor are electrically connected with the output end of the first power supply circuit; the signal output positive electrode pin SIG+ of the first pressure sensor is electrically connected with the positive input pin of the first operational amplifier, the first end of the eighth capacitor is connected to the common connection end between the signal output positive electrode pin SIG+ of the first pressure sensor and the positive input pin of the first operational amplifier, and the second end of the eighth capacitor is grounded; the signal output negative electrode pin SIG-of the first pressure sensor is electrically connected with the inverting input pin of the first operational amplifier, the first end of the ninth capacitor is connected to the common connection end between the signal output negative electrode pin SIG-of the first pressure sensor and the inverting input pin of the first operational amplifier, and the second end of the ninth capacitor is grounded;
The positive power pin of the first operational amplifier is electrically connected with a +12V power end through the ninth resistor, the first end of the eleventh capacitor is connected to a common connection end between the positive power pin of the first operational amplifier and the ninth resistor, and the second end of the eleventh capacitor is grounded; the reference voltage power supply pin of the first operational amplifier is electrically connected with a +0.11V power supply end, the grounding pin of the first operational amplifier is grounded, and the first gain pin of the first operational amplifier is electrically connected with the second gain pin of the first operational amplifier through the eighth resistor; the output pin of the first operational amplifier is electrically connected with the input end of the main control circuit through the sixth resistor, the first end of the seventh resistor and the first end of the tenth capacitor are both connected to a common connection end between the sixth resistor and the input end of the main control circuit, and the second end of the seventh resistor and the second end of the tenth capacitor are both grounded;
the first anode of the first bidirectional diode is electrically connected with the +3.3V power supply end, the second anode of the first bidirectional diode is grounded, and the cathode of the first bidirectional diode is connected to the common connection end between the sixth resistor and the input end of the main control circuit.
Optionally, the flow detection circuit comprises a second power supply electronic circuit, a flow acquisition sub-circuit and a flow output sub-circuit;
the input end of the flow acquisition sub-circuit is electrically connected with the output end of the second power supply electronic circuit, and the output end of the flow acquisition sub-circuit is electrically connected with the input end of the main control circuit through the flow output sub-circuit.
Optionally, the second power supply electronic circuit includes a second dual-channel operational amplifier, a tenth resistor, an eleventh resistor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, and a fifteenth capacitor;
the positive power pin +VS of the second dual-channel operational amplifier is electrically connected with the +12V power end through the twelfth resistor, the first end of the fifteenth capacitor is connected to the common connection end between the positive power pin +VS of the second dual-channel operational amplifier and the twelfth resistor, the second end of the fifteenth capacitor is grounded, and the negative power pin-VS of the second dual-channel operational amplifier is grounded;
the first positive signal input pin +IN/A, the first negative signal input pin-IN/A and the first output pin OUT/A of the second dual-channel operational amplifier are suspended;
The first end of the twelfth capacitor is connected to a common connection end between the second positive electrode signal input pin +IN/B of the second dual-channel operational amplifier and the +3V power supply end, and the second end of the twelfth capacitor is grounded; the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier is electrically connected with the input end of the flow acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier is grounded through the tenth resistor;
the second output pin OUT/B of the second dual-channel operational amplifier is grounded through the eleventh resistor and the fourteenth capacitor in sequence, and the input end of the flow acquisition sub-circuit is also connected to a common connection end between the eleventh resistor and the fourteenth capacitor; the first end of the thirteenth capacitor is connected to the common connection end between the second output pin OUT/B of the second dual-channel operational amplifier and the eleventh resistor, and the second end of the thirteenth capacitor is connected to the common connection end between the second negative electrode signal input pin IN/B of the second dual-channel operational amplifier and the tenth resistor.
Optionally, the flow acquisition sub-circuit comprises a second pressure sensor, a second operational amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth capacitor, a seventeenth capacitor and an eighteenth capacitor;
the positive electrode pin LEXC+ of the power supply circuit and the negative electrode pin LEXC-of the power supply circuit of the second pressure sensor are electrically connected with the output end of the second power supply electronic circuit; the signal output positive electrode pin SIG+ of the second pressure sensor is electrically connected with the positive input pin of the second operational amplifier, the first end of the seventeenth capacitor is connected to the common connection end between the signal output positive electrode pin SIG+ of the second pressure sensor and the positive input pin of the second operational amplifier, and the second end of the seventeenth capacitor is grounded; the signal output negative electrode pin SIG-of the second pressure sensor is electrically connected with the inverting input pin of the second operational amplifier, the first end of the sixteenth capacitor is connected to the common connection end between the signal output negative electrode pin SIG-of the second pressure sensor and the inverting input pin of the second operational amplifier, and the second end of the sixteenth capacitor is grounded;
the positive power pin of the second operational amplifier is electrically connected with a +12V power end through the thirteenth resistor, the first end of the eighteenth capacitor is connected to a common connection end between the positive power pin of the second operational amplifier and the thirteenth resistor, and the second end of the eighteenth capacitor is grounded; the reference voltage power supply pin of the second operational amplifier is electrically connected with a +0.11V power supply end, the grounding pin of the second operational amplifier is grounded, and the first gain pin of the second operational amplifier is electrically connected with the second gain pin and the third gain pin of the second operational amplifier through the fourteenth resistor; and an output pin of the second operational amplifier is electrically connected with the flow output sub-circuit sequentially through the fifteenth resistor.
Optionally, the flow output subcircuit includes a sixteenth resistor, a seventeenth resistor, a nineteenth capacitor, and a second bidirectional diode;
the first end of the sixteenth resistor is electrically connected with the output end of the flow acquisition sub-circuit, the second end of the sixteenth resistor is electrically connected with the input end of the main control circuit, the first end of the seventeenth resistor and the first end of the nineteenth capacitor are both connected to a common connection end between the sixteenth resistor and the input end of the main control circuit, and the second end of the seventeenth resistor and the second end of the nineteenth capacitor are both grounded;
the first anode of the second bidirectional diode is electrically connected with the +3.3V power supply end, the second anode of the second bidirectional diode is grounded, and the cathode of the second bidirectional diode is connected to the common connection end between the sixteenth resistor and the input end of the main control circuit.
Optionally, the indoor carbon dioxide content detection circuit comprises a gas content sensor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty first resistor, a twentieth capacitor and a triode;
the driving pin HD of the gas content sensor is electrically connected with the collector electrode of the triode, the first end of the twenty-first resistor is electrically connected with the +5V power supply end, and the second end of the twenty-first resistor is connected to the common connection end between the driving pin HD of the gas content sensor and the collector electrode of the triode; the base electrode of the triode is electrically connected with the output end of the main control circuit through the twentieth resistor, and the emitting electrode of the triode is grounded;
The PWM output pin of the gas content sensor is electrically connected with the input end of the main control circuit through an eighteenth resistor, the signal transmitting pin TX of the gas content sensor is electrically connected with the input end of the main control circuit through the nineteenth resistor, and the signal receiving pin RX of the gas content sensor is electrically connected with the output end of the main control circuit; the power input pin VIN of the gas content sensor is electrically connected with the +5V power end, the power input pin VIN of the gas content sensor is grounded through the twentieth capacitor, and the grounding pin of the gas content sensor is grounded; the sampling pin SR, the voltage output pin VO and the automatic offset calibration pin AOT of the gas content sensor are all suspended.
Optionally, the device further comprises a temperature detection circuit arranged in the gas path of the pneumoperitoneum machine;
the temperature detection circuit is electrically connected with the main control circuit.
The utility model has the beneficial effects that: the pressure condition of the whole gas path output by the pneumoperitoneum machine can be detected by a pressure detection circuit arranged at the gas outlet of the gas path; the gas flow in the gas path can be detected through the flow detection circuit arranged in the gas path; the carbon dioxide content in the environment can be detected by an indoor carbon dioxide content detection circuit arranged in the pneumoperitoneum machine use environment; by utilizing the electric connection between the detection circuits and the main control circuit, the results detected by the detection circuits can be transmitted to the main control circuit, and the main control circuit can synthesize the detection results for analysis so as to master the working state of the whole pneumoperitoneum machine; the multifunctional pneumoperitoneum machine monitoring device provided by the utility model has the advantages of diversified detection functions and high accuracy in comprehensive monitoring and evaluation of the working state of the pneumoperitoneum machine.
Drawings
The features and advantages of the present utility model will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the utility model in any way, in which:
FIG. 1 shows a block diagram of a multifunctional pneumoperitoneum machine monitoring device in an embodiment of the present utility model;
FIG. 2 shows a block diagram of a pressure detection circuit in an embodiment of the utility model;
FIG. 3A is a schematic diagram of a first power supply circuit according to an embodiment of the utility model;
FIG. 3B is a schematic diagram of a first circuit of a pressure acquisition sub-circuit according to an embodiment of the present utility model;
FIG. 3C is a schematic diagram of a second pressure acquisition sub-circuit in accordance with an embodiment of the present utility model;
FIG. 4 shows a block diagram of a flow detection circuit in an embodiment of the utility model;
FIG. 5A is a schematic diagram of a second power supply circuit in a flow detection circuit according to an embodiment of the present utility model;
FIG. 5B shows a schematic diagram of a flow acquisition sub-circuit and a flow output sub-circuit in a flow detection circuit according to an embodiment of the present utility model;
FIG. 6 shows a design of an indoor carbon dioxide content detection circuit in an embodiment of the utility model;
FIG. 7 is a block diagram of another multi-functional pneumoperitoneum machine monitoring device in accordance with an embodiment of the present utility model;
Fig. 8 shows a complete structural diagram of the monitoring device of the multifunctional pneumoperitoneum machine in the embodiment of the utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
As shown in FIG. 1, the multifunctional pneumoperitoneum machine monitoring device comprises a main control circuit, a pressure detection circuit, a flow detection circuit and an indoor carbon dioxide content detection circuit;
the pressure detection circuit is arranged at the air outlet of the air passage of the pneumoperitoneum machine, the flow detection circuit is arranged in the air passage of the pneumoperitoneum machine, and the indoor carbon dioxide content detection circuit is arranged in the use environment of the pneumoperitoneum machine;
the pressure detection circuit, the flow detection circuit and the indoor carbon dioxide content detection circuit are all electrically connected with the main control circuit.
The multifunctional pneumoperitoneum machine monitoring device can detect the gas pressure, the gas flow and the CO in the use environment in the gas circuit of the pneumoperitoneum machine simultaneously 2 The content, the detection function are diversified, and the accuracy of comprehensively monitoring and evaluating the working state of the pneumoperitoneum machine is high.
Specifically, the functions of each circuit in the utility model are as follows:
based on the electric connection relation between the pressure detection circuit and the main control circuit, the pressure detection circuit is used for detecting the gas pressure at the gas outlet of the gas circuit of the pneumoperitoneum machine and sending the gas pressure to the main control circuit;
based on the electric connection relation between the flow detection circuit and the main control circuit, the flow detection circuit is used for detecting the gas flow in the gas circuit of the pneumoperitoneum machine and sending the gas flow to the main control circuit;
based on the electrical connection relation between the indoor carbon dioxide content detection circuit and the main control circuit, the indoor carbon dioxide content detection circuit is used for detecting the carbon dioxide content in the use environment of the pneumoperitoneum machine and sending the carbon dioxide content to the main control circuit;
and the main control circuit is used for obtaining the working state of the pneumoperitoneum machine according to the gas pressure, the gas flow and the carbon dioxide content.
The working state of the pneumoperitoneum machine comprises normal and abnormal states, wherein the normal range value of each index (namely gas pressure, gas flow and carbon dioxide content) can be preset respectively, and when the detection results of all indexes are in the corresponding normal range values, the pneumoperitoneum machine is normal; and when the detection result of at least one index is not in the corresponding normal range value, the index is abnormal.
When the pneumoperitoneum machine is inflated with CO2 gas in the abdominal cavity, smoke is generated when energy surgical instruments such as an electrotome are used, and at the moment, the CO2 gas containing the smoke is discharged into a room (namely, the use environment of the pneumoperitoneum machine), so that the concentration of CO2 in the room is higher, and doctors are drowsy and tired, so that the accuracy of evaluating the working state of the pneumoperitoneum machine is higher by detecting the content of carbon dioxide in the use environment and combining the gas flow and the gas pressure.
The pneumoperitoneum machine monitoring device realizes functional diversification by improving the hardware circuit structures of the main control circuit, the pressure detection circuit, the flow detection circuit and the indoor carbon dioxide content detection circuit and the electric connection relation among the circuits, and does not relate to the improvement of computer programs. The main control circuit obtains the working state of the pneumoperitoneum machine according to the gas pressure, the gas flow and the carbon dioxide content, wherein the related computer programs adopt the existing computer programs, and the corresponding computer programs can be stored in a memory or a storage area of the main control circuit in advance.
The master control circuit of the embodiment comprises a singlechip with a plurality of GPIO ports, ADC ports and communication ports, and the singlechip with the model STM32F407VGT6 is selected.
Preferably, as shown in fig. 2, the pressure detection circuit includes a first power supply electronic circuit and two identical pressure acquisition sub-circuits;
the input ends of the two pressure acquisition sub-circuits are electrically connected with the output end of the first power supply circuit, and the output ends of the two pressure acquisition sub-circuits are electrically connected with the main control circuit. .
Two paths of identical pressure acquisition subcircuits are arranged, so that the accuracy of pressure detection can be improved; the output end of the first power supply electronic circuit is electrically connected with the input ends of the two pressure acquisition sub-circuits, and the first power supply electronic circuit is independently used for supplying power to the two pressure acquisition sub-circuits, so that the problem of larger pressure detection deviation of the two pressure acquisition sub-circuits can be solved.
Specifically, as shown in fig. 3A, the first power supply circuit includes a first dual-channel operational amplifier U12, a first resistor R19, a second resistor R21, a third resistor R23, a fourth resistor R25, a fifth resistor R26, a first capacitor C58, a second capacitor C61, a third capacitor C62, a fourth capacitor C64, a fifth capacitor C65, a sixth capacitor C66, and a seventh capacitor C67;
the positive power supply pin +VS of the first dual-channel operational amplifier U12 is electrically connected with the +12V power supply end through the first resistor R19, the first end of the second capacitor C61 is connected to the common connection end between the positive power supply pin +VS of the first dual-channel operational amplifier U12 and the first resistor R19, the second end of the second capacitor C61 is grounded, and the negative power supply pin-VS of the first dual-channel operational amplifier U12 is grounded;
The first positive electrode signal input pin +IN/A and the second positive electrode signal input pin +IN/B of the first dual-channel operational amplifier U12 are electrically connected with the +3V power supply end; a first end of the sixth capacitor C66 is connected to a common connection end between the first positive signal input pin +in/a of the first dual-channel operational amplifier U12 and the +3v power supply end, and a second end of the sixth capacitor C66 is grounded; a first end of the seventh capacitor C67 is connected to a common connection end between the second positive signal input pin +in/B of the first dual-channel operational amplifier U12 and the +3v power supply end, and a second end of the seventh capacitor C67 is grounded;
the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier U12 is electrically connected with the input end of the first path of pressure acquisition subcircuit, and the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier U12 is also grounded through the fourth resistor R25; the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier U12 is electrically connected with the input end of the second pressure acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier U12 is also grounded through the fifth resistor R26;
The first output pin OUT/a of the first dual-channel operational amplifier U12 is grounded sequentially through the second resistor R21 and the first capacitor C58, the input end of the first channel pressure acquisition subcircuit is further connected to a common connection end between the second resistor R21 and the first capacitor C58, the first end of the fourth capacitor C64 is connected to a common connection end between the first output pin OUT/a of the first dual-channel operational amplifier U12 and the second resistor R21, and the second end of the fourth capacitor C64 is connected to a common connection end between the first negative electrode signal input pin-IN/a of the first dual-channel operational amplifier U12 and the fourth resistor R25;
the second output pin OUT/B of the first dual-channel operational amplifier U12 is grounded sequentially through the third resistor R23 and the third capacitor C62, the input end of the second channel pressure acquisition sub-circuit is further connected to a common connection end between the third resistor R23 and the third capacitor C62, the first end of the fifth capacitor C65 is connected to a common connection end between the second output pin OUT/B of the first dual-channel operational amplifier U12 and the third resistor R23, and the second end of the fifth capacitor C65 is connected to a common connection end between the second negative signal input pin-IN/B of the first dual-channel operational amplifier U12 and the fifth resistor R26.
IN the first power supply electronic circuit with the structure, the +VS pin of the U12 is connected with +12V power supply, the +IN/A pin and the-IN/B pin are respectively connected with +3V power supply required by two paths of power supply, the OUT/A pin and the-IN/A pin are respectively connected with the first path of pressure acquisition sub-circuit, the OUT/B pin and the-IN/B pin are respectively connected with the second path of pressure acquisition sub-circuit, and the independent power supply of the two paths of pressure acquisition sub-circuits can be realized by fewer components through the first power supply electronic circuit.
In the first power supply and electronic circuit, the first dual-channel op-amp U12 is an OPA2197IDR type op-amp, and the specifications or types of the resistors and capacitors are shown in fig. 3A, which is not described herein.
Preferably, as shown in fig. 3B and 3C, each of the two pressure acquisition sub-circuits includes a first pressure sensor, a first operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a first bidirectional diode;
in each pressure acquisition sub-circuit, a positive electrode pin +LEXC+ of a power supply circuit and a positive electrode pin +LEXC+ of the power supply circuit of the first pressure sensor are electrically connected with the output end of the first power supply circuit; the signal output positive electrode pin SIG+ of the first pressure sensor is electrically connected with the positive input pin of the first operational amplifier, the first end of the eighth capacitor is connected to the common connection end between the signal output positive electrode pin SIG+ of the first pressure sensor and the positive input pin of the first operational amplifier, and the second end of the eighth capacitor is grounded; the signal output negative electrode pin SIG-of the first pressure sensor is electrically connected with the inverting input pin of the first operational amplifier, the first end of the ninth capacitor is connected to the common connection end between the signal output negative electrode pin SIG-of the first pressure sensor and the inverting input pin of the first operational amplifier, and the second end of the ninth capacitor is grounded;
The positive power pin of the first operational amplifier is electrically connected with a +12V power end through the ninth resistor, the first end of the eleventh capacitor is connected to a common connection end between the positive power pin of the first operational amplifier and the ninth resistor, and the second end of the eleventh capacitor is grounded; the reference voltage power supply pin of the first operational amplifier is electrically connected with a +0.11V power supply end, the grounding pin of the first operational amplifier is grounded, and the first gain pin of the first operational amplifier is electrically connected with the second gain pin of the first operational amplifier through the eighth resistor; the output pin of the first operational amplifier is electrically connected with the input end of the main control circuit through the sixth resistor, the first end of the seventh resistor and the first end of the tenth capacitor are both connected to a common connection end between the sixth resistor and the input end of the main control circuit, and the second end of the seventh resistor and the second end of the tenth capacitor are both grounded;
the first anode of the first bidirectional diode is electrically connected with the +3.3V power supply end, the second anode of the first bidirectional diode is grounded, and the cathode of the first bidirectional diode is connected to the common connection end between the sixth resistor and the input end of the main control circuit.
Through the pressure acquisition subcircuit of the structure, the output gas pressure at the gas outlet of the gas circuit can be independently detected according to the two-way acquisition mode, and compared with the single-way acquisition mode, the accuracy of the output gas pressure can be effectively improved.
Specifically, in the first path of pressure acquisition sub-circuit shown in fig. 3B, U10 and U11 are the first pressure sensor and the first operational amplifier, R18, R20, R22 and R24 are the sixth resistor, the seventh resistor, the eighth resistor and the ninth resistor, C57, C59, C60 and C63 are the eighth capacitor, the ninth capacitor, the tenth capacitor and the eleventh capacitor, respectively, and D6 is the first bidirectional diode. The first pressure sensor U10 can select a pressure sensor with a proper model according to actual conditions, the first operational amplifier U11 selects an operational amplifier with INA826AIDR model, and the first bidirectional diode D6 selects a bidirectional diode with BAV99A7 model. IN the first path of pressure acquisition subcircuit, a positive pin LEXC+ of a calibration circuit of U10 is connected to a common connection end between a second resistor R21 and a first capacitor C58 IN FIG. 3A, a negative pin LEXC-of the calibration circuit is connected with an-IN/A pin of U12 IN FIG. 3A, and PRESS1 is finally acquired and input into a singlechip.
Specifically, in the second pressure acquisition sub-circuit shown in fig. 3C, U13 and U14 are the first pressure sensor and the first operational amplifier, R31, R32, R33, and R34 are the sixth resistor, the seventh resistor, the eighth resistor, and the ninth resistor, C68, C70, C69, and C71 are the eighth capacitor, the ninth capacitor, the tenth capacitor, and the eleventh capacitor, respectively, and D7 is the first bidirectional diode. Similarly, the first pressure sensor U13 may be a pressure sensor of a suitable model according to practical situations, the first operational amplifier U14 may be an operational amplifier of the INA826AIDR model, and the first bidirectional diode D7 may be a bidirectional diode of the BAV99A7 model. IN the second pressure acquisition sub-circuit, a positive pin LEXC+ of a calibration circuit of U13 is connected to a common connection end between a third resistor R23 and a third capacitor C62 IN FIG. 3A, a negative pin LEXC-of the calibration circuit is connected with an-IN/B pin of U12 IN FIG. 3A, and PRESS2 is finally acquired and input into the singlechip.
The two pressure acquisition sub-circuits are identical in structure, and specifications or types of the resistors and the capacitors are shown in fig. 3B and 3C in detail, which are not further described herein.
Preferably, as shown in fig. 4, the flow detection circuit includes a second power supply electronic circuit, a flow acquisition sub-circuit, and a flow output sub-circuit;
The input end of the flow acquisition sub-circuit is electrically connected with the output end of the second power supply electronic circuit, and the output end of the flow acquisition sub-circuit is electrically connected with the input end of the main control circuit through the flow output sub-circuit.
The flow detection circuit with the structure forms a first scheme of flow detection, the second power supply electronic circuit directly supplies power to the flow acquisition sub-circuit, the flow acquisition sub-circuit is utilized to directly acquire gas flow, and the gas flow is conveyed to the main control circuit through the flow output sub-circuit, so that flow detection is realized.
Specifically, as shown in fig. 5A, the second power supply circuit includes a second dual-channel operational amplifier U27, a tenth resistor R142, an eleventh resistor R152, a twelfth resistor R153, a twelfth capacitor C143, a thirteenth capacitor C144, a fourteenth capacitor C145, and a fifteenth capacitor C146;
the positive power pin +vs of the second dual-channel operational amplifier U27 is electrically connected to the +12v power terminal through the twelfth resistor R153, the first terminal of the fifteenth capacitor C146 is connected to the common connection terminal between the positive power pin +vs of the second dual-channel operational amplifier U27 and the twelfth resistor R153, the second terminal of the fifteenth capacitor C146 is grounded, and the negative power pin-VS of the second dual-channel operational amplifier U27 is grounded;
The first positive signal input pin +IN/A, the first negative signal input pin-IN/A and the first output pin OUT/A of the second dual-channel operational amplifier U27 are suspended;
the second positive signal input pin +in/B of the second dual-channel operational amplifier U27 is electrically connected to the +3v power supply terminal, the first terminal of the twelfth capacitor C143 is connected to the common connection terminal between the second positive signal input pin +in/B of the second dual-channel operational amplifier U27 and the +3v power supply terminal, and the second terminal of the twelfth capacitor C143 is grounded; the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier U27 is electrically connected to the input end of the flow acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier U27 is further grounded through the tenth resistor R142;
the second output pin OUT/B of the second dual-channel operational amplifier U27 is grounded through the eleventh resistor R152 and the fourteenth capacitor C145 in sequence, and the input end of the flow acquisition sub-circuit is further connected to a common connection end between the eleventh resistor R152 and the fourteenth capacitor C145; the first end of the thirteenth capacitor C144 is connected to a common connection terminal between the second output pin OUT/B of the second dual-channel op-amp U27 and the eleventh resistor R152, and the second end of the thirteenth capacitor C144 is connected to a common connection terminal between the second negative signal input pin-IN/B of the second dual-channel op-amp U27 and the tenth resistor R142.
Through the second power supply electronic circuit with the structure, the flow acquisition sub-circuit can be independently powered, and the flow acquisition sub-circuit has fewer components and simple structure.
Specifically, as shown in fig. 5B, the flow acquisition sub-circuit includes a second pressure sensor U16, a second operational amplifier U15, a thirteenth resistor R37, a fourteenth resistor R40, a fifteenth resistor R141, a sixteenth capacitor C72, a seventeenth capacitor C73, and an eighteenth capacitor C77;
the positive electrode pin LEXC+ of the power supply circuit and the negative electrode pin LEXC-of the power supply circuit of the second pressure sensor U16 are electrically connected with the output end of the second power supply electronic circuit; the signal output positive electrode pin sig+ of the second pressure sensor U16 is electrically connected to the positive input pin of the second operational amplifier U15, a first end of the seventeenth capacitor C73 is connected to a common connection end between the signal output positive electrode pin sig+ of the second pressure sensor U16 and the positive input pin of the second operational amplifier U15, and a second end of the seventeenth capacitor C73 is grounded; a signal output negative electrode pin SIG of the second pressure sensor U16 is electrically connected to an inverting input pin of the second operational amplifier U15, a first end of the sixteenth capacitor C72 is connected to a common connection end between the signal output negative electrode pin SIG of the second pressure sensor U16 and the inverting input pin of the second operational amplifier U15, and a second end of the sixteenth capacitor C72 is grounded;
The positive power pin of the second operational amplifier U15 is electrically connected with the +12v power end through the thirteenth resistor R37, the first end of the eighteenth capacitor C77 is connected to the common connection end between the positive power pin of the second operational amplifier U15 and the thirteenth resistor R37, and the second end of the eighteenth capacitor C77 is grounded; the reference voltage power supply pin of the second operational amplifier U15 is electrically connected with a +0.11V power supply end, the grounding pin of the second operational amplifier U15 is grounded, and the first gain pin of the second operational amplifier U15 is electrically connected with the second gain pin of the second operational amplifier U15 through the fourteenth resistor R40; the output pin of the second operational amplifier U15 is electrically connected to the flow output sub-circuit through the fifteenth resistor R141 in sequence.
Specifically, as shown in fig. 5B, the flow output subcircuit includes a sixteenth resistor R38, a seventeenth resistor R39, a nineteenth capacitor C74, and a second bidirectional diode D8;
a first end of the sixteenth resistor R38 is electrically connected with the output end of the flow acquisition sub-circuit, a second end of the sixteenth resistor R38 is electrically connected with the input end of the main control circuit, a first end of the seventeenth resistor R39 and a first end of the nineteenth capacitor C74 are both connected to a common connection end between the sixteenth resistor R38 and the input end of the main control circuit, and a second end of the seventeenth resistor R39 and a second end of the nineteenth capacitor C74 are both grounded;
The first anode of the second bidirectional diode D8 is electrically connected to the +3.3v power supply terminal, the second anode of the second bidirectional diode D8 is grounded, and the cathode of the second bidirectional diode D8 is connected to the common connection terminal between the sixteenth resistor R38 and the input terminal of the master control circuit.
In the flow acquisition sub-circuit with the structure, the pressure acquired by the second pressure sensor U16 is converted to obtain flow, and then the flow is transmitted to the main control circuit by the flow output sub-circuit, so that flow acquisition is realized.
The pressure collected by the second pressure sensor U16 may be converted into a flow rate, and a conversion relationship between the pressure and the flow rate may be fitted in advance. The specific method for fitting the conversion relationship between pressure and flow is prior art in the art, and is not described in detail herein.
Specifically, IN the FLOW acquisition sub-circuit IN fig. 5B, the positive electrode pin lexc+ of the calibration circuit of the second pressure sensor U16 is connected to the common connection end between the eleventh resistor R152 and the fourteenth capacitor C145 IN fig. 5A, the negative electrode pin LEXC-of the calibration circuit is connected to the-IN/B pin of the second dual-channel op-amp U27 IN fig. 5A, and the pressure is finally acquired and converted to FLOW1, and the FLOW output sub-circuit is used to obtain the final FLOW and input the FLOW into the singlechip.
Preferably, as shown in fig. 6, the indoor carbon dioxide content detection circuit includes a gas content sensor U19, an eighteenth resistor R57, a nineteenth resistor R58, a twentieth resistor R144, a twenty-first resistor R145, a twentieth capacitor C88, and a triode Q5;
the driving pin HD of the gas content sensor U19 is electrically connected to the collector of the triode Q5, the first end of the twenty-first resistor R145 is electrically connected to the +5v power supply end, and the second end of the twenty-first resistor R145 is connected to the common connection end between the driving pin HD of the gas content sensor U19 and the collector of the triode Q5; the base electrode of the triode Q5 is electrically connected with the output end of the main control circuit through the twentieth resistor R144, and the emitting electrode of the triode Q5 is grounded;
the PWM output pin of the gas content sensor U19 is electrically connected with the input end of the main control circuit through an eighteenth resistor R57, the signal transmitting pin TX of the gas content sensor U19 is electrically connected with the input end of the main control circuit through a nineteenth resistor R58, and the signal receiving pin RX of the gas content sensor U19 is electrically connected with the output end of the main control circuit; the power input pin VIN of the gas content sensor U19 is electrically connected to the +5v power supply terminal, the power input pin VIN of the gas content sensor U19 is further grounded through the twentieth capacitor C88, and the ground pin of the gas content sensor U19 is grounded; the sampling pin SR, the voltage output pin VO and the automatic offset calibration pin AOT of the gas content sensor U19 are suspended.
Through the indoor carbon dioxide content detection circuit of above-mentioned structure, can be respectively with two kinds of interaction modes, realize the communication interaction between gas content sensor U19 and the main control circuit, and then realize the detection of carbon dioxide content, the reliability is high. The hd_co2 port in fig. 6 receives an output signal of the main control circuit, and the mrxd_co2 port sends a signal to the main control circuit, so as to realize indoor carbon dioxide content detection in a first interaction mode (specifically, a TTL level interaction mode); the mtxd_co2 port in fig. 6 receives the output signal of the main control circuit, and the pwm_co2 port sends a signal to the main control circuit, so as to realize the indoor carbon dioxide content detection in the second interaction mode (specifically, the interaction mode of the PWM signal).
Specifically, the gas content sensor U19 of the present embodiment is CO 2 The sensor can select a proper model of CO according to actual conditions 2 A sensor chip; triode Q5 selectionThe model or specification of each resistor and capacitor is shown in fig. 6 by using an MMBT3904LT1G model triode, and is not listed here.
Preferably, as shown in fig. 7, the device further comprises a temperature detection circuit arranged in the air path of the pneumoperitoneum machine; the temperature detection circuit is electrically connected with the main control circuit.
The temperature detection circuit can be used for detecting the temperature in the air channel in real time, and the working state of the air channel can be further mastered.
In this embodiment, the temperature detection circuit adopts the existing conventional design, and the specific circuit structure is not described here again.
The complete structure of the multifunctional pneumoperitoneum machine monitoring device is shown in fig. 8 (the temperature detection circuit is not shown), and the device can be used for comprehensively and accurately monitoring and evaluating the working state of the gas circuit, so that the functions are diversified.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations are within the scope of the utility model as defined by the appended claims.
Claims (10)
1. The multifunctional pneumoperitoneum machine monitoring device is characterized by comprising a main control circuit, a pressure detection circuit, a flow detection circuit and an indoor carbon dioxide content detection circuit;
the pressure detection circuit is arranged at the air outlet of the air passage of the pneumoperitoneum machine, the flow detection circuit is arranged in the air passage of the pneumoperitoneum machine, and the indoor carbon dioxide content detection circuit is arranged in the use environment of the pneumoperitoneum machine;
The pressure detection circuit, the flow detection circuit and the indoor carbon dioxide content detection circuit are all electrically connected with the main control circuit.
2. The multi-functional pneumoperitoneum machine monitoring device of claim 1, wherein the pressure detection circuit comprises a first power supply electronic circuit and two identical pressure acquisition sub-circuits;
the input ends of the two pressure acquisition sub-circuits are electrically connected with the output end of the first power supply circuit, and the output ends of the two pressure acquisition sub-circuits are electrically connected with the main control circuit.
3. The multi-functional pneumoperitoneum machine monitoring device of claim 2, wherein the first power supply electronic circuit comprises a first dual channel op amp, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, and a seventh capacitor;
the positive power supply pin +VS of the first dual-channel operational amplifier is electrically connected with the +12V power supply end through the first resistor, the first end of the second capacitor is connected to the common connection end between the positive power supply pin +VS of the first dual-channel operational amplifier and the first resistor, the second end of the second capacitor is grounded, and the negative power supply pin-VS of the first dual-channel operational amplifier is grounded;
The first positive electrode signal input pin +IN/A and the second positive electrode signal input pin +IN/B of the first dual-channel operational amplifier are electrically connected with the +3V power supply end; the first end of the sixth capacitor is connected to a common connection end between a first positive signal input pin +IN/A of the first dual-channel operational amplifier and the +3V power supply end, and the second end of the sixth capacitor is grounded; the first end of the seventh capacitor is connected to a common connection end between the second positive signal input pin +IN/B of the first dual-channel operational amplifier and the +3V power supply end, and the second end of the seventh capacitor is grounded;
the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier is electrically connected with the input end of the first path of pressure acquisition subcircuit, and the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier is grounded through the fourth resistor; the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier is electrically connected with the input end of the second pressure acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the first dual-channel operational amplifier is grounded through the fifth resistor;
the first output pin OUT/A of the first dual-channel operational amplifier is grounded through the second resistor and the first capacitor IN sequence, the input end of the first path of pressure acquisition subcircuit is also connected to a common connection end between the second resistor and the first capacitor, the first end of the fourth capacitor is connected to the common connection end between the first output pin OUT/A of the first dual-channel operational amplifier and the second resistor, and the second end of the fourth capacitor is connected to the common connection end between the first negative electrode signal input pin-IN/A of the first dual-channel operational amplifier and the fourth resistor;
The second output pin OUT/B of the first dual-channel operational amplifier sequentially passes through the third resistor and the third capacitor to be grounded, the input end of the second pressure acquisition sub-circuit is further connected to a common connection end between the third resistor and the third capacitor, the first end of the fifth capacitor is connected to the common connection end between the second output pin OUT/B of the first dual-channel operational amplifier and the third resistor, and the second end of the fifth capacitor is connected to the common connection end between the second negative electrode signal input pin IN/B of the first dual-channel operational amplifier and the fifth resistor.
4. The multi-functional pneumoperitoneum machine monitoring device of claim 2, wherein both of the pressure acquisition subcircuits include a first pressure sensor, a first operational amplifier, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, and a first bidirectional diode;
in each pressure acquisition sub-circuit, a positive electrode pin LEXC+ of a power supply circuit and a negative electrode pin LEXC-of the power supply circuit of the first pressure sensor are electrically connected with the output end of the first power supply circuit; the signal output positive electrode pin SIG+ of the first pressure sensor is electrically connected with the positive input pin of the first operational amplifier, the first end of the eighth capacitor is connected to the common connection end between the signal output positive electrode pin SIG+ of the first pressure sensor and the positive input pin of the first operational amplifier, and the second end of the eighth capacitor is grounded; the signal output negative electrode pin SIG-of the first pressure sensor is electrically connected with the inverting input pin of the first operational amplifier, the first end of the ninth capacitor is connected to the common connection end between the signal output negative electrode pin SIG-of the first pressure sensor and the inverting input pin of the first operational amplifier, and the second end of the ninth capacitor is grounded;
The positive power pin of the first operational amplifier is electrically connected with a +12V power end through the ninth resistor, the first end of the eleventh capacitor is connected to a common connection end between the positive power pin of the first operational amplifier and the ninth resistor, and the second end of the eleventh capacitor is grounded; the reference voltage power supply pin of the first operational amplifier is electrically connected with a +0.11V power supply end, the grounding pin of the first operational amplifier is grounded, and the first gain pin of the first operational amplifier is electrically connected with the second gain pin of the first operational amplifier through the eighth resistor; the output pin of the first operational amplifier is electrically connected with the input end of the main control circuit through the sixth resistor, the first end of the seventh resistor and the first end of the tenth capacitor are both connected to a common connection end between the sixth resistor and the input end of the main control circuit, and the second end of the seventh resistor and the second end of the tenth capacitor are both grounded;
the first anode of the first bidirectional diode is electrically connected with the +3.3V power supply end, the second anode of the first bidirectional diode is grounded, and the cathode of the first bidirectional diode is connected to the common connection end between the sixth resistor and the input end of the main control circuit.
5. The multi-functional pneumoperitoneum machine monitoring device of claim 1, wherein the flow detection circuit comprises a second power supply electronic circuit, a flow acquisition sub-circuit, and a flow output sub-circuit;
the input end of the flow acquisition sub-circuit is electrically connected with the output end of the second power supply electronic circuit, and the output end of the flow acquisition sub-circuit is electrically connected with the input end of the main control circuit through the flow output sub-circuit.
6. The multi-functional pneumoperitoneum machine monitoring device of claim 5, wherein the second power supply electronic circuit comprises a second dual channel op amp, a tenth resistor, an eleventh resistor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, and a fifteenth capacitor;
the positive power pin +VS of the second dual-channel operational amplifier is electrically connected with the +12V power end through the twelfth resistor, the first end of the fifteenth capacitor is connected to the common connection end between the positive power pin +VS of the second dual-channel operational amplifier and the twelfth resistor, the second end of the fifteenth capacitor is grounded, and the negative power pin-VS of the second dual-channel operational amplifier is grounded;
The first positive signal input pin +IN/A, the first negative signal input pin-IN/A and the first output pin OUT/A of the second dual-channel operational amplifier are suspended;
the first end of the twelfth capacitor is connected to a common connection end between the second positive electrode signal input pin +IN/B of the second dual-channel operational amplifier and the +3V power supply end, and the second end of the twelfth capacitor is grounded; the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier is electrically connected with the input end of the flow acquisition sub-circuit, and the second negative electrode signal input pin-IN/B of the second dual-channel operational amplifier is grounded through the tenth resistor;
the second output pin OUT/B of the second dual-channel operational amplifier is grounded through the eleventh resistor and the fourteenth capacitor in sequence, and the input end of the flow acquisition sub-circuit is also connected to a common connection end between the eleventh resistor and the fourteenth capacitor; the first end of the thirteenth capacitor is connected to the common connection end between the second output pin OUT/B of the second dual-channel operational amplifier and the eleventh resistor, and the second end of the thirteenth capacitor is connected to the common connection end between the second negative electrode signal input pin IN/B of the second dual-channel operational amplifier and the tenth resistor.
7. The multi-functional pneumoperitoneum machine monitoring device of claim 5, wherein the flow acquisition subcircuit comprises a second pressure sensor, a second operational amplifier, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth capacitor, a seventeenth capacitor, and an eighteenth capacitor;
the positive electrode pin LEXC+ of the power supply circuit and the negative electrode pin LEXC-of the power supply circuit of the second pressure sensor are electrically connected with the output end of the second power supply electronic circuit; the signal output positive electrode pin SIG+ of the second pressure sensor is electrically connected with the positive input pin of the second operational amplifier, the first end of the seventeenth capacitor is connected to the common connection end between the signal output positive electrode pin SIG+ of the second pressure sensor and the positive input pin of the second operational amplifier, and the second end of the seventeenth capacitor is grounded; the signal output negative electrode pin SIG-of the second pressure sensor is electrically connected with the inverting input pin of the second operational amplifier, the first end of the sixteenth capacitor is connected to the common connection end between the signal output negative electrode pin SIG-of the second pressure sensor and the inverting input pin of the second operational amplifier, and the second end of the sixteenth capacitor is grounded;
The positive power pin of the second operational amplifier is electrically connected with a +12V power end through the thirteenth resistor, the first end of the eighteenth capacitor is connected to a common connection end between the positive power pin of the second operational amplifier and the thirteenth resistor, and the second end of the eighteenth capacitor is grounded; the reference voltage power supply pin of the second operational amplifier is electrically connected with a +0.11V power supply end, the grounding pin of the second operational amplifier is grounded, and the first gain pin of the second operational amplifier is electrically connected with the second gain pin of the second operational amplifier through the fourteenth resistor; and an output pin of the second operational amplifier is electrically connected with the flow output sub-circuit sequentially through the fifteenth resistor.
8. The multi-function pneumoperitoneum machine monitoring device of claim 5, wherein the flow output subcircuit comprises a sixteenth resistor, a seventeenth resistor, a nineteenth capacitor, and a second bidirectional diode;
the first end of the sixteenth resistor is electrically connected with the output end of the flow acquisition sub-circuit, the second end of the sixteenth resistor is electrically connected with the input end of the main control circuit, the first end of the seventeenth resistor and the first end of the nineteenth capacitor are both connected to a common connection end between the sixteenth resistor and the input end of the main control circuit, and the second end of the seventeenth resistor and the second end of the nineteenth capacitor are both grounded;
The first anode of the second bidirectional diode is electrically connected with the +3.3V power supply end, the second anode of the second bidirectional diode is grounded, and the cathode of the second bidirectional diode is connected to the common connection end between the sixteenth resistor and the input end of the main control circuit.
9. The multifunctional pneumoperitoneum machine monitoring device of any of claims 1 to 8, wherein the indoor carbon dioxide content detection circuit comprises a gas content sensor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty first resistor, a twentieth capacitor, and a triode;
the driving pin HD of the gas content sensor is electrically connected with the collector electrode of the triode, the first end of the twenty-first resistor is electrically connected with the +5V power supply end, and the second end of the twenty-first resistor is connected to the common connection end between the driving pin HD of the gas content sensor and the collector electrode of the triode; the base electrode of the triode is electrically connected with the output end of the main control circuit through the twentieth resistor, and the emitting electrode of the triode is grounded;
the PWM output pin of the gas content sensor is electrically connected with the input end of the main control circuit through an eighteenth resistor, the signal transmitting pin TX of the gas content sensor is electrically connected with the input end of the main control circuit through the nineteenth resistor, and the signal receiving pin RX of the gas content sensor is electrically connected with the output end of the main control circuit; the power input pin VIN of the gas content sensor is electrically connected with the +5V power end, the power input pin VIN of the gas content sensor is grounded through the twentieth capacitor, and the grounding pin of the gas content sensor is grounded; the sampling pin SR, the voltage output pin VO and the automatic offset calibration pin AOT of the gas content sensor are all suspended.
10. The multifunctional pneumoperitoneum machine monitoring device according to any one of claims 1 to 8, further comprising a temperature detection circuit provided in the gas path of the pneumoperitoneum machine;
the temperature detection circuit is electrically connected with the main control circuit.
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