CN215179985U - Nitric oxide detector - Google Patents
Nitric oxide detector Download PDFInfo
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- CN215179985U CN215179985U CN202022968499.9U CN202022968499U CN215179985U CN 215179985 U CN215179985 U CN 215179985U CN 202022968499 U CN202022968499 U CN 202022968499U CN 215179985 U CN215179985 U CN 215179985U
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Abstract
The utility model provides a nitric oxide detector, include: the gas collection module is provided with a return-to-zero gas circuit and a detection gas circuit for detecting exhaled nitric oxide; the gas treatment module is used for stabilizing the flow rate, drying and removing interference gas; the nitric oxide detection module is formed by connecting three electrochemical nitric oxide sensors in parallel; the data processing and transmitting module is used for converting, transmitting and displaying data; the device comprises a control module and a power supply module. The utility model discloses a two gas circuits detect nitric oxide gas, have improved detection precision and detection efficiency, through parallelly connected three nitric oxide sensor, set up to enlarge, filter circuit to circuit branch road and trunk circuit, the cubic has improved nitric oxide sensor's detection precision.
Description
Technical Field
The utility model relates to a medical treatment detects technical field, and more specifically says, relates to a nitric oxide detector.
Background
NO is an important biological messenger molecule that plays an important regulatory role in biological processes of organisms. The concentration of NO can predict the occurrence of some diseases, such as asthma, cardiovascular diseases, etc. However, NO molecules are very small and very active, the half-life period is short, and the detection is difficult, so that the search for a real-time, rapid and simple nitric oxide detection method becomes a problem which is generally concerned by the chemical and medical fields. At present, methods for detecting nitric oxide mainly comprise a chemiluminescence method, an ultraviolet-visible spectrum method, a fluorescence spectrum method, an electron spin resonance spectrum method and an electrochemical method.
The currently used nitric oxide transmission detector in the electrochemical method is single gas path detection, a zero gas path is not provided, the detector needs to be restarted or zero in an environment without nitric oxide, and when the zero of the Chinese angelica is inaccurate, the measurement precision of the nitric oxide detector is very easily influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a nitric oxide detector adopts two gas circuits to solve the not high technical problem of traditional single gas circuit nitric oxide detector testing result degree of accuracy to through parallelly connected three nitric oxide sensor, enlarge, filter circuit to circuit branch road and main line setting, the cubic has improved nitric oxide sensor's precision.
The utility model provides a nitric oxide detector, include:
the gas collection module is provided with a return-to-zero gas circuit and a detection gas circuit for detecting exhaled nitric oxide;
the gas treatment module is used for stabilizing the flow rate, drying and removing interference gas;
the nitric oxide detection module is formed by connecting three electrochemical nitric oxide sensors in parallel;
the data processing and transmitting module is used for converting, transmitting and displaying data;
the control module is in communication connection with the gas collection module, the gas processing module, the nitric oxide detection module and the data processing and transmission module to control starting, stopping and running;
and the power supply module is connected with the gas collection module, the gas processing module, the nitric oxide detection module, the data processing and transmission module and the control module to realize power supply.
Preferably, the gas collection module comprises an air blowing funnel, an air pump, a gas chamber and a nitric oxide removal chamber, wherein the air blowing funnel is connected with the gas chamber through a gas pipe; the air is pumped by the air pump to enter the nitric oxide removing chamber through an air pipe and then is connected with the air chamber.
Preferably, the gas treatment module comprises a constant flow valve, a gas drying chamber, an interfering gas removal chamber and a tail gas treatment chamber.
Preferably, the data processing and transmitting module specifically includes a circuit processing module, a digital-to-analog conversion module, and a data transmission and display module.
Preferably, the control module comprises a first one-way electromagnetic release valve, a second one-way electromagnetic release valve, a third one-way electromagnetic release valve and a fourth one-way electromagnetic release valve, and the first one-way electromagnetic release valve is positioned between the nitric oxide removing chamber and the air chamber; the second one-way electromagnetic valve is positioned between the gas drying chamber and the interference gas removing chamber; the third one-way electromagnetic release valve is positioned between the interference gas removal chamber and the nitric oxide detection module; and the fourth one-way electromagnetic release valve is positioned between the nitric oxide detection module and the tail gas treatment chamber.
Preferably, the power module comprises an external power line connected to the circuit board and a power switch.
Preferably, the electrochemical nitric oxide sensor is specifically an electrochemical nitric oxide sensor with the precision of 6-20ppb, and is fixed on the circuit board in a plugging manner.
Preferably, the drying substance used in the gas drying chamber is made of anhydrous calcium chloride and silica gel.
Preferably, the nitric oxide removal chamber removes nitric oxide using a nitric oxide scavenger.
Compared with the prior art, the nitric oxide detector provided by the utility model adopts the return-to-zero gas circuit and the detection gas circuit for detecting the exhaled nitric oxide gas to realize double gas circuit detection, thereby improving the detection precision and accuracy; through three parallelly connected nitric oxide sensors, carry out the response current of cubic amplification in the circuit, improved the detection precision of traditional nitric oxide sensor, make traditional nitric oxide sensor can detect the concentration that is lower than its ultimate concentration, improved the detection precision, utilize the numerical value that its detected and the numerical value that utilizes high accuracy nitric oxide sensor to detect to have the uniformity, practiced thrift equipment cost and test cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a block diagram of a nitric oxide detector according to the present invention;
fig. 2 is a schematic structural diagram of the nitric oxide detector provided by the present invention.
The device comprises a gas extraction pump 1, a nitric oxide removal chamber 2, a blowing funnel 3, a gas pipe 4, a gas chamber 5, a gas drying chamber 6, an interference gas removal chamber 7, a nitric oxide detection module 8, a data processing and transmitting module 9, a tail gas processing chamber 10 and a constant flow valve 11.
Detailed Description
The core of the utility model is to provide a nitric oxide detector, the detection efficiency and the detection precision of nitric oxide have been promoted remarkably.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 and fig. 2, fig. 1 is a block diagram of a nitric oxide detector according to the present invention; fig. 2 is a schematic structural diagram of the nitric oxide detector provided by the present invention.
The utility model provides a nitric oxide detector, including gas collection module, gas processing module, nitric oxide detection module 8, data processing transmission module 9, control module and power module.
The gas collection module comprises two gas paths, wherein one gas path is a return-to-zero gas path and is used for realizing zero setting treatment before detection, and the other gas path is a detection gas path for detecting exhaled nitric oxide and realizes detection of nitric oxide concentration of gas supplied at the inlet of the gas collection module. In addition, the nitric oxide detection module 8 is formed by connecting three electrochemical nitric oxide sensors in parallel.
Specifically, the air from which the interfering gas is removed by the return-to-zero gas path is subjected to nitric oxide concentration detection, and the concentration is taken as the return-to-zero concentration, and the return-to-zero gas can blow the residual nitric oxide-containing gas out of the instrument, so that the detection precision of the nitric oxide detector is improved; the gas to be detected enters the gas collection module through the detection gas circuit, then enters the nitric oxide detection module 8 through gas drying and interference gas removal, three electrochemical nitric oxide sensors in the nitric oxide detection module 8 generate weak current in response to nitric oxide in the gas to be detected, the response current on the main circuit is amplified again and filtered through the amplification and filtering circuits on the sensor branch circuit and the convergence of the response current on the main circuit, and the precision of the nitric oxide sensors is improved. The amplified sensor response current is transmitted to the data processing and transmitting module 9, the response current is converted into a displayable digital signal by the digital-to-analog conversion module, and the displayable digital signal is transmitted to a display screen or other clients through the data transmission module.
In a specific embodiment, the gas collection module comprises a blowing funnel 3, an air pump 1, an air chamber 5 and a nitric oxide removal chamber 2, wherein nitric oxide is removed in the nitric oxide removal chamber 2 by using a nitric oxide scavenger, and the nitric oxide removal chamber is used for removing nitric oxide in air, is used for zeroing a nitric oxide detector and ensures the accuracy of the detector.
In the return-to-zero gas path, the air is extracted by the air extracting pump 1, enters the nitric oxide removing chamber 2 through the air pipe 4 and then enters the air chamber 5, and in the detection gas path, external gas enters the air chamber 5 through the blowing funnel 3 and the air pipe 4.
The gas treatment module comprises a constant flow valve 11, a gas drying chamber 6, an interference gas removing chamber 7 and a tail gas treatment chamber 10, wherein exhaled gas or air which is treated to have no nitric oxide in a gas chamber 5 passes through the constant flow valve 11 to control the flow rate of the gas and enters the gas drying chamber 6, a drying substance used by the gas drying chamber 6 consists of anhydrous calcium chloride, silica gel and a drying substance, the drying substance can be one or more of neutral drying substances, the gas is absorbed by a water absorbing substance of the drying chamber to absorb moisture in the gas to be detected, and the moisture in the gas to be detected is prevented from influencing the detection precision of the sensor and damaging the sensor; the dried gas to be detected enters an interference gas removing chamber 7, so that the gas which can be responded by the nitric oxide sensor is removed, the interference which is possibly generated by the electrochemical nitric oxide sensor responding to the non-nitric oxide gas is eliminated, and the detection precision of the sensor is improved; the tail gas treatment chamber 10 removes gas which is not friendly to the environment and is exhaled, and improves the purity of the gas.
In a preferred embodiment, the control module comprises a first one-way electromagnetic release valve, a second one-way electromagnetic release valve, a third one-way electromagnetic release valve and a fourth one-way electromagnetic release valve. Specifically, a first one-way electromagnetic release valve is positioned between the nitric oxide removing chamber 2 and the air chamber 5, a second one-way electromagnetic valve is positioned between the gas drying chamber 6 and the interference gas removing chamber 7, and a third one-way electromagnetic release valve is positioned between the interference gas removing chamber 7 and the nitric oxide detecting module 8; the fourth one-way electromagnetic release valve is positioned between the nitric oxide detection module 8 and the tail gas treatment chamber 10, and each one-way electromagnetic release valve is in communication connection with the control module, so that the automatic on-off of the gas circuit is realized under the control of the control module.
The data processing and transmitting module 9 comprises a circuit processing module, a digital-to-analog conversion module and a data transmission and display module, wherein the circuit processing module responds to nitric oxide and generates micro current, current amplification, filtering, secondary amplification and secondary filtering, so that the detection precision is improved; the digital-to-analog conversion module converts the current signal into a digital signal, and the visualization of the test result is realized through the data transmission and display module.
Preferably, the electrochemical nitric oxide sensor is fixed on the circuit board in a plugging mode, so that the sensor can be replaced conveniently.
Preferably, the electrochemical nitric oxide sensor is an electrochemical nitric oxide sensor with the precision of 6-20ppb, and the three electrochemical nitric oxide sensors are connected in parallel, and the amplification and filtering circuits are arranged on the branch circuit and the trunk circuit, so that the precision of the nitric oxide sensor is improved for three times.
In addition, the nitric oxide removing chamber 2 can remove nitric oxide by using nitric oxide scavenger, and is used for zeroing the nitric oxide detector so as to ensure the accuracy of the instrument.
The utility model provides a nitric oxide detector detects nitric oxide's process as follows:
air enters the nitric oxide removing chamber 2 through the air extracting pump 1 to remove nitric oxide gas in the air, the gas flow rate is controlled through the constant flow valve 11, a certain amount of air is constantly discharged to enter the gas drying chamber 6 for drying, gas influencing detection is removed through the interference gas removing chamber 7, the air from which the interference gas is removed enters the nitric oxide detecting module 8, the concentration of nitric oxide is detected, and the concentration is used as the return-to-zero concentration. Because the constant flow valve 11 and each one-way electromagnetic release valve are opened in sequence, the zero-return gas can blow the residual nitric oxide-containing gas out of the instrument, and the detection precision of the nitric oxide detector is improved.
The gas to be detected enters the gas chamber 5 through the blowing funnel 3, the gas to be detected is constantly output through the constant flow valve 11, the gas to be detected is dried through the gas drying chamber 6, the interference gas is removed through the interference gas removing chamber 7, the processed gas to be detected enters the nitric oxide detection module 8, three sensors in the detection chamber respond to the nitric oxide in the gas to be detected to generate weak current, the response current on a sensor branch path is amplified, a filter circuit and a main path are converged, the response current on the main path is amplified again and filtered, and the precision of the nitric oxide sensor is improved. The amplified sensor response current is transmitted to the data processing and transmitting module 9, the response current is converted into a displayable digital signal by the digital-to-analog conversion module, and the displayable digital signal is transmitted to a display screen or other clients through the data transmission module. The power module is composed of an external power line and a power switch which are connected to the circuit board and supplies power to the whole instrument.
Compared with the prior nitric oxide detector, the utility model adopts double gas circuit detection, thereby improving the detection precision and accuracy; three traditional nitric oxide sensors are connected in parallel, response current is amplified for three times in circuit design, detection precision of the traditional nitric oxide sensors is improved, the commercially available nitric oxide sensors can detect concentration lower than the limit concentration of the nitric oxide sensors, detected numerical values are consistent with the numerical values detected by the high-precision nitric oxide sensors, and expensive high-precision nitric oxide sensors are not purchased.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The above is to the nitric oxide detector provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. A nitric oxide detector, comprising:
the gas collection module is provided with a return-to-zero gas circuit and a detection gas circuit for detecting exhaled nitric oxide;
the gas treatment module is used for stabilizing the flow rate, drying and removing interference gas;
the nitric oxide detection module (8) is formed by connecting three electrochemical nitric oxide sensors in parallel;
the data processing and transmitting module (9) is used for converting, transmitting and displaying data;
the control module is in communication connection with the gas collection module, the gas processing module, the nitric oxide detection module (8) and the data processing and transmission module (9) to control start, stop and operation;
and the power supply module is used for being connected with the gas collection module, the gas processing module, the nitric oxide detection module (8), the data processing and transmission module (9) and the control module so as to realize power supply.
2. The nitric oxide detector according to claim 1, wherein the gas collection module comprises an air blowing funnel (3), an air pump (1), a gas chamber (5) and a nitric oxide removing chamber (2), wherein the air blowing funnel (3) is connected with the gas chamber (5) through an air pipe (4); the air is pumped by the air pump (1) and enters the nitric oxide removing chamber (2) through an air pipe (4) and then is connected with the air chamber (5).
3. The nitric oxide detector according to claim 2, wherein the gas treatment module comprises a constant flow valve (11), a gas drying chamber (6), an interfering gas removal chamber (7) and a tail gas treatment chamber (10).
4. The nitric oxide detector according to claim 3, wherein the data processing and transmitting module (9) comprises a circuit processing module, a digital-to-analog conversion module, and a data transmitting and displaying module.
5. The nitric oxide detector according to claim 4, wherein said control module comprises a first one-way electromagnetic release valve, a second one-way electromagnetic release valve, a third one-way electromagnetic release valve and a fourth one-way electromagnetic release valve, said first one-way electromagnetic release valve being located between said nitric oxide removal chamber (2) and said gas chamber (5); the second one-way solenoid valve is positioned between the gas drying chamber (6) and the interference gas removal chamber (7); the third one-way electromagnetic release valve is positioned between the interference gas removal chamber (7) and the nitric oxide detection module (8); the fourth one-way electromagnetic release valve is positioned between the nitric oxide detection module (8) and the tail gas treatment chamber (10).
6. The nitric oxide detector of claim 1, wherein the power module comprises an external power line and a power switch connected to the circuit board.
7. The nitric oxide detector according to claim 1, wherein the electrochemical nitric oxide sensor is an electrochemical nitric oxide sensor with an accuracy of 6-20ppb, and is fixed on the circuit board by means of plugging.
8. The nitric oxide detector according to claim 3, wherein the drying substance used in the gas drying chamber (6) is made of anhydrous calcium chloride and silica gel.
9. The nitric oxide detector according to any of claims 2 to 5, wherein a nitric oxide scavenger is used in the nitric oxide removal chamber (2) to remove nitric oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022968499.9U CN215179985U (en) | 2020-12-11 | 2020-12-11 | Nitric oxide detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022968499.9U CN215179985U (en) | 2020-12-11 | 2020-12-11 | Nitric oxide detector |
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| CN215179985U true CN215179985U (en) | 2021-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814103A (en) * | 2022-04-28 | 2022-07-29 | 青岛华仁医疗用品有限公司 | Off-line exhaled gas nitric oxide detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814103A (en) * | 2022-04-28 | 2022-07-29 | 青岛华仁医疗用品有限公司 | Off-line exhaled gas nitric oxide detection device |
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