CN210742134U - Gas detection system - Google Patents
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- CN210742134U CN210742134U CN201921750467.2U CN201921750467U CN210742134U CN 210742134 U CN210742134 U CN 210742134U CN 201921750467 U CN201921750467 U CN 201921750467U CN 210742134 U CN210742134 U CN 210742134U
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Abstract
The utility model discloses a gas detection system, including detecting the different gaseous detection mechanism one of principle and gaseous detection mechanism two, still include gaseous sampling mechanism, gaseous storage mechanism one and gaseous storage mechanism two, the air inlet of gaseous storage mechanism one with the air inlet of gaseous storage mechanism two respectively with the gas outlet intercommunication of gaseous sampling mechanism, the gas outlet of gaseous storage mechanism one with gaseous detection mechanism one intercommunication, the gas outlet of gaseous storage mechanism two with gaseous detection mechanism two intercommunication. The utility model discloses gaseous detecting system includes two kinds of gaseous detection mechanism that detect the principle difference, designs like this, can revise another kind of gaseous detection mechanism's testing result deviation in real time with one of them gaseous detection mechanism's testing result when detecting to guarantee the reliability of test revision result, have good popularization prospect.
Description
Technical Field
The utility model relates to a gas analysis detects the field, and specifically speaking relates to a gas detection system.
Background
The measurement of the components and concentration of the exhaled gas in the human body can help doctors diagnose the diseases of patients, monitor the disease state, observe the treatment effect and the like, for example, the exhaled nitric oxide is used for detecting asthma, and the exhaled carbon monoxide is used for detecting gas poisoning.
The detection of exhaled nitric oxide becomes a key index for clinical judgment of respiratory diseases internationally and domestically, but the detection module of the current commercialized exhaled nitric oxide analyzer is an electrochemical method, such as a NIOXVERO model product of Circassia, the sensitivity and stability of the detection module cannot be guaranteed, although the detection module can be calibrated by standard gas, the nitric oxide concentration in human exhalation is ppb (10 ppb) level (the concentration of nitric oxide in human exhalation is 10)-9L/L), preferably using ppb standard gas for calibration, but the commercially available standard gas is ppm level for ensuring precision and storage, and larger error can be introduced by directly using the ppm level standard gas for calibration; electrochemical detection is susceptible to ambient temperature, humidity, background drift, and natural decay over time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a detect more accurate gas detection system is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a gas detection system, includes that the different gaseous detection mechanism of detection principle and gaseous detection mechanism two still include gaseous sampling mechanism, gaseous storage mechanism one and gaseous storage mechanism two, the air inlet of gaseous storage mechanism one with the air inlet of gaseous storage mechanism two respectively with the gas outlet intercommunication of gaseous sampling mechanism, the gas outlet of gaseous storage mechanism one with gaseous detection mechanism one intercommunication, the gas outlet of gaseous storage mechanism two with gaseous detection mechanism two intercommunication.
Further, the first gas detection mechanism is an electrochemical gas detection device, and the second gas detection mechanism is a chemiluminescent gas detection device.
Further, an exhaust pipe is connected to the first gas storage mechanism, and a valve is mounted on the exhaust pipe.
Further, the gas sampling mechanism comprises a sampling pipe, and a flow regulating valve, a pressure sensor and a flow velocity sensor are mounted on the sampling pipe.
Further, a humidity balance mechanism is connected between the first gas storage mechanism and the first gas detection mechanism.
Further, the ozone generating mechanism is further included, the second gas detection mechanism is a chemical luminescence method gas detection device, a reaction chamber is connected between a gas outlet of the second gas storage mechanism and the second gas detection mechanism, and a gas outlet of the ozone generating mechanism is communicated with the reaction chamber.
The gas sampling mechanism comprises a sampling pipe, a gas outlet of the sampling pipe is communicated with a gas inlet of the first gas storage mechanism and a gas inlet of the second gas storage mechanism through a first valve array, a gas outlet of the gas inlet pipe of the ozone generation mechanism is communicated with a gas inlet of the ozone generation mechanism and a gas inlet of the evacuation pipe through a second valve array, and the first valve array is communicated with the second valve array through a connecting pipe;
the first valve array is controllable, the gas outlet of the sampling pipe, the gas inlet of the first gas storage mechanism, the gas inlet of the second gas storage mechanism and the connection pipe are mutually connected and disconnected, the second valve array is controllable, the gas outlet of the ozone generation mechanism gas inlet pipe, the gas inlet of the ozone generation mechanism, the gas inlet of the emptying pipe and the connection pipe are mutually connected and disconnected.
Furthermore, a first pump is connected between the first gas storage mechanism and the first gas detection mechanism, a second pump is connected between the second valve array and the air inlet of the ozone generation mechanism, and the ozone generation device further comprises a third pump, wherein the air inlet of the third pump is communicated with the first gas storage mechanism.
The beneficial effects of the utility model are embodied in:
the utility model discloses gaseous detecting system includes two kinds of different gaseous detection mechanism of detection principle, designs like this, can come the testing result deviation of another kind of gaseous detection mechanism of real-time correction with one of them gaseous detection mechanism's testing result when detecting, and concrete correction method sees concrete embodiment part, can guarantee higher detection accuracy, moreover the utility model discloses a design, can guarantee that the gaseous sample that gets into in gaseous storage mechanism one and the gaseous storage mechanism two is the same to guarantee the reliability of test correction result, in addition, gaseous sample gets into gaseous detection mechanism one, before two, at first gaseous storage mechanism one, buffer memory in two, can guarantee that there is the gaseous sample of capacity to detect, more reliable and more stable, design like this moreover, simple structure, convenient operation has good popularization prospect.
Drawings
Fig. 1 is a schematic structural diagram of a gas detection system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the operation of the gas detection system according to an embodiment of the present invention.
The components in the drawings are labeled as follows: the device comprises a sampling pipe 1, a gas detection mechanism I2, a gas detection mechanism II 3, a gas storage mechanism I4, a gas storage mechanism II 5, an ozone generation mechanism 6, a reaction chamber 7, a valve array I8, a valve array II 9, an emptying pipe 10, an ozone generation mechanism inlet pipe 11, a filtering mechanism 12, a connecting pipe 13, an exhaust pipe 14, a valve 15, a flow regulating valve 16, a pressure sensor 17, a flow rate sensor 18, a pump I19, a pump II 20, a pump III 21 and a humidity balance mechanism 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
See fig. 1 and 2.
The utility model discloses gaseous detecting system still includes gaseous sampling mechanism, gaseous storage mechanism 4 and gaseous storage mechanism two 5 including the gaseous detection mechanism 2 and the gaseous detection mechanism two 3 that detect the principle difference, gaseous storage mechanism 4's air inlet with gaseous storage mechanism two 5's air inlet respectively with the gas outlet intercommunication of gaseous sampling mechanism, gaseous storage mechanism 4's gas outlet with gaseous detection mechanism 2 intercommunication, gaseous storage mechanism two 5's gas outlet with gaseous detection mechanism two 3 intercommunication.
The utility model discloses gaseous detecting system includes two kinds of gaseous detection mechanism that detect the principle difference, designs like this, can use one of them gas when detectingThe method for correcting the detection result deviation of the other gas detection mechanism in real time by the detection result of the gas detection mechanism comprises (1) analyzing and collecting a gas sample, respectively introducing the gas sample into the gas detection mechanism I and the gas detection mechanism II for detection to obtain a detection concentration result value C1 of the gas detection mechanism I and a detection concentration result value C2 of the gas detection mechanism II, and (2) judging and calculating a result difference value △ C and a result percentage difference value&C，△C＝∣C1－C2∣，
△ C is compared with a preset result difference judgment value A,&c is compared with a preset result percentage difference judgment value B, if the C is not more than △ and/or A is not more than △&C is less than or equal to B, taking C1 as a final detection result, and if △ C is more than A and&c is larger than B, C2 is used as the final detection result, practice proves that the correction can ensure higher detection accuracy, and the result difference value △ C and the result percentage difference value are used&The two modes are combined for judgment, so that the result percentage difference value can be avoided when the base number of the result value of the detected concentration is small&And C, the judgment accuracy is low, and when the detection concentration result value cardinal number is large, the judgment accuracy is low by using the result difference value △ C, so that the method is more accurate, reliable and stable.
And the utility model discloses a design can guarantee that the gaseous sample that gets into in gaseous storage mechanism one and the gaseous storage mechanism two is the same to guarantee the reliability of test correction result, in addition, gaseous sample is earlier buffer memory in gaseous storage mechanism one, two before getting into gaseous detection mechanism one, two, can guarantee to have the gaseous sample of capacity to detect, and is more reliable and more stable, designs like this moreover, simple structure, convenient operation has good popularization prospect.
Preferably, the first gas detection mechanism adopts an electrochemical detection principle, and the second gas detection mechanism adopts a chemiluminescence detection principle. In the process of implementing the present invention, the inventor finds that the electrochemical method detection is corrected by the chemiluminescence method detection, which is most suitable, the correction effect is more reliable, and the accuracy is higher.
In specific implementation, the first gas detection mechanism can adopt an MNO-LO type sensor of CityTech or an NO/C-1 type sensor of Membrapor, and the second gas detection mechanism can adopt a 42i type trace nitrogen oxide analyzer of ThermoFisher or i11 NO-NO of Beijing, Zhang science and technology, Inc2-a NOx analyzer. In specific implementation, the first and second gas storage mechanisms can adopt any container with an inner cavity for storing gas.
The preset result difference judgment value a and the preset result percentage difference judgment value B can be selected according to the gas components to be detected, as long as the accuracy of the result can be ensured, and the following provides a better selection range of judgment values of several common gases:
for Nitric Oxide (NO), A is 3ppb to 10ppb, B is 5% to 20%;
for hydrogen sulfide (H)2S), A is 3ppb to 10ppb, B is 5 percent to 20 percent;
for carbon monoxide (CO), A is 0.1ppm to 2ppm, B is 5 percent to 20 percent;
for hydrogen (H)2) 0.1ppm to 2ppm of A and 5 percent to 20 percent of B;
for methane (CH)4) The A is 0.1ppm to 2ppm, and the B is 5 percent to 20 percent.
Preferably, before the gas detection system is used for detection, the gas detection mechanism one 2 and the gas detection mechanism two 3 are calibrated in advance, and the specific process of calibration is as follows: standard gas with known concentration C (concentration C is based on the component to be detected) is respectively introduced into the gas detection mechanism one 2 and the gas detection mechanism two 3 for detection, a response signal S1 of the standard gas with known concentration C of the gas detection mechanism one 2 and a response signal S2 of the standard gas with known concentration C of the gas detection mechanism two 3 are obtained, and then a correlation coefficient K1 between the response signal of the gas detection mechanism one 2 and the gas concentration and a correlation coefficient K2 between the response signal of the gas detection mechanism two 3 and the gas concentration are calculated, wherein K1 is S1/C, and K2 is S2/C. Calibration is a necessary step required by most existing gas detection mechanisms, and subsequent detection results are obtained by carrying out reverse extrapolation on correlation coefficients and response signals.
Preferably, the gas detection system adopts a correction operation mode, and the specific implementation manner of the correction operation mode is as follows: when the gas detection system has a detection condition with C2 as a final detection result, the C1 and C2 in the detection condition are used for correcting K1, namely K1 'is used for replacing K1, and K1' ═ C1 × K1/C2 serves as the basis of the next detection. When the detection condition who uses C2 as final testing result appears, explains that drift has appeared in gaseous detection mechanism, and because the utility model discloses a revise mode, replace K1 with modified value K1' when appearing the drift, can calibrate the system like this in real time to can reduce the drift phenomenon that takes place in the long-term use, ensure the stability of long-term use.
Preferably, the gas detection system is self-calibrated at intervals (the time interval is determined as required), and the self-calibration is implemented by: collecting a gas sample, respectively introducing the gas sample into a first gas detection mechanism 2 and a second gas detection mechanism 3 for detection to obtain a detection concentration result value C1 'of the first gas detection mechanism 2 and a detection concentration result value C2' of the second gas detection mechanism 3, and then correcting K1 by using C1 'and C2', namely using a correction value K1 'to replace K1, wherein the correction value K1' is C1 '. K1/C2' as a subsequent detection basis. The calibration of the gas detection system by using the standard gas provided by the standard qualification company is the most authoritative and accurate method, but the standard gas is stored in a vacuum steel cylinder and is difficult to be used at a client in time, the first gas detection mechanism is easily influenced by the temperature and the humidity of the environment due to the characteristics of chemical analysis, fluctuation is possible in each period of time, the second gas detection mechanism can maintain long-time stability only by using high-concentration standard gas for periodic calibration every year, and the cost and the time of the traditional calibration process can be greatly reduced by using the self-calibration method.
In an embodiment, the device further comprises an ozone generating mechanism 6, the second gas detection mechanism 3 adopts a chemiluminescence detection principle, a reaction chamber 7 is connected between the gas outlet of the second gas storage mechanism 5 and the second gas detection mechanism 3, and the gas outlet of the ozone generating mechanism 6 is communicated with the reaction chamber 7. The chemiluminescence method detects the principle and needs to use ozone, therefore, under this kind of embodiment, needs to dispose ozone and takes place the mechanism, and ozone that ozone takes place the mechanism and produces is in the reacting chamber with gaseous sample effect, later gets into and detects in the gaseous detection mechanism two, can guarantee to detect the accuracy, designs like this moreover, simple structure, convenient operation.
In one embodiment, an exhaust pipe 14 is connected to the first gas storage mechanism 4, and a valve 15 is installed on the exhaust pipe 14. By the design, when a gas sample enters the first gas storage mechanism, the valve is opened, so that the original gas in the first gas storage mechanism can be discharged through the exhaust pipe, and the interference detection is prevented. In the specific implementation, the valve 15 can be a check valve or a stop valve.
In one embodiment, the sampling tube 1 is provided with a flow regulating valve 16, a pressure sensor 17 and a flow rate sensor 18. The flow regulating valve is used for regulating the flow of a gas sample in a proper range, the pressure sensor and the flow rate sensor are used for monitoring the pressure and the flow rate of the gas sample, only the gas sample meeting the requirements is allowed to be introduced into the gas storage mechanism I and the gas storage mechanism II, and the gas sample not meeting the requirements is discharged into the atmosphere (according to the stipulation in the technical standard guideline for online and offline measurement of nitric oxide exhaled from the respiratory tract and the nose in 2005 of the American Thoracic Society (ATS) and the European Respiratory Society (ERS), the collection of the sample gas for detecting the nitric oxide exhaled gas needs to meet the requirements that the expiratory flow is 50 +/-5 ml/s, and the expiratory pressure is more than or equal to 5cmH2O, so that the test result can be judged by applying the unified standard).
In one embodiment, a humidity balance mechanism 22 is connected between the gas storage mechanism 4 and the gas detection mechanism 2. Humidity balance mechanism is used for adjusting the humidity of gaseous sample, and the testing result of gaseous detection mechanism one receives sample gas humidity to influence very big, balances the humidity of gas through humidity balance mechanism before gaseous detection mechanism one at every turn gets into, if humidity is greater than when environmental humidity, then dehumidifies sample gas, if humidity is less than when environmental humidity, then humidifies sample gas.
In one embodiment, the gas sampling device further comprises an emptying pipe 10 and an ozone generating mechanism inlet pipe 11, a filtering mechanism 12 is installed on the ozone generating mechanism inlet pipe 11, the gas sampling mechanism comprises a sampling pipe 1, a gas outlet of the sampling pipe 1 is communicated with a gas inlet of a gas storage mechanism I4 and a gas inlet of a gas storage mechanism II 5 through a valve array I8, a gas outlet of the ozone generating mechanism inlet pipe 11 is communicated with a gas inlet of an ozone generating mechanism 6 and a gas inlet of the emptying pipe 10 through a valve array II 9, and the valve array I8 is communicated with the valve array II 9 through a connecting pipe 13;
the valve array 8 is controllable the gas outlet of sampling pipe 1, the air inlet of gas storage mechanism 4, the air inlet of gas storage mechanism two 5 and the break-make between linking pipe 13 each other, valve array two 9 is controllable the gas outlet of ozone generation mechanism intake pipe 11, the air inlet of ozone generation mechanism 6, the air inlet of evacuation pipe 10 and the break-make between linking pipe 13 each other.
The air inlet pipe of the ozone generating mechanism is arranged for introducing raw material gas, specifically air, into the ozone generating mechanism, and the arranged filtering mechanism is used for filtering moisture, dust and substances to be detected (NO, CO and the like) in the air so as to avoid the interference of generating ozone and detecting;
the emptying pipe is arranged and all the parts are connected through the first valve array and the second valve array, so that the use is more convenient, for example, when a gas sample collected by the sampling pipe does not meet the requirement, only the gas outlet of the sampling pipe is communicated with the connecting pipe through the first valve array, other parts based on the first valve array are mutually cut off, only the connecting pipe is communicated with the gas inlet of the emptying pipe through the second valve array, other parts based on the second valve array are mutually cut off, and thus the gas sample which does not meet the requirement can be sequentially discharged into the atmosphere through the connecting pipe and the emptying pipe;
in addition, for most gas detection mechanisms, the response signal of the gas to be detected is obtained based on a blank control of a blank gas containing no gas to be detected, for example, the detection signal of the gas to be detected with the concentration of C is SCDetection of a blank gas free of the gas to be detectedThe signal is S0If the response signal S of the gas to be measured with the concentration C is SC－S0And blank gas can be conveniently collected through the design, specifically, through the valve array I, only the connecting pipe is communicated with the gas inlet of the gas storage mechanism I and the gas inlet of the gas storage mechanism II, other parts based on the valve array I are mutually cut off, through the valve array II, only the gas outlet of the ozone generation mechanism gas inlet pipe is communicated with the connecting pipe, other parts based on the valve array II are mutually cut off, air after filtration is blank gas, enters the gas storage mechanism I and the gas storage mechanism II through the connecting pipe, and is detected to obtain S0。
The utility model discloses gaseous detecting system can come the sampling from the air inlet expired gas of sampling pipe, also can be earlier with gas sample collection to the air pocket, then is connected the air pocket with the air inlet of sampling pipe, takes gas sample out from the air pocket during the test.
When the breath is sampled, the breath has a certain flow rate, so that equipment for providing gas flow power, such as a pump, does not need to be arranged in the system, and the breath can directly flow to the first gas detection mechanism and the second gas detection mechanism.
If the collected gas sample has no flow rate, for example, the gas bag sampling method, a pump or other devices capable of providing gas flow power need to be arranged on the corresponding channel, so as to introduce the gas sample into the first gas detection mechanism and the second gas detection mechanism. For example, in one implementation, a first pump 19 is connected between the first gas storage mechanism 4 and the first gas detection mechanism 2, a second pump 20 is connected between the second valve array 9 and the gas inlet of the ozone generating mechanism 6, and a third pump 21 is further included, and the gas inlet of the third pump 21 is communicated with the first gas storage mechanism 4. The first pump is used for pumping the gas sample in the first gas storage mechanism into the first gas detection mechanism, the second pump is used for pumping air into the ozone generation mechanism, meanwhile, the ozone generation mechanism is communicated with the reaction chamber, so that the gas sample can be squeezed into the second gas detection mechanism, and the third pump is used for sampling, can pump the gas sample in the gas bag into the first gas storage mechanism and simultaneously squeeze the gas sample into the second gas storage mechanism.
Taking the gas detection system of one embodiment shown in fig. 1 as an example, the following general description is provided for its usage:
when sampling is expired, the pump III is closed, the valve is opened, the valve gate array I is switched, the sampling pipe is kept communicated with the gas storage mechanism I and the gas storage mechanism II, the expired gas which meets the requirements and is adjusted by the flow regulating valve enters the gas storage mechanism I and the gas storage mechanism II, the valve is closed again, the pump I and the pump II are opened, the valve gate array II is switched, the ozone generating mechanism air inlet pipe is kept communicated with the ozone generating mechanism, and thus the gas sample stored in the gas storage mechanism I enters the gas detection mechanism I to obtain a detection signal S1 of the gas to be detected of the gas detection mechanism IGeneral assemblyThe gas sample stored in the gas storage mechanism II and the ozone generated by the ozone generating mechanism enter the reaction chamber and then enter the gas detection mechanism II to obtain a detection signal S2 of the gas to be detected of the gas detection mechanism IIGeneral assemblyAfter detection is finished, the first switching valve array and the second switching valve array keep the air inlet pipe of the ozone generating mechanism communicated with the first gas storage mechanism and the second gas storage mechanism, blank air obtained by filtering through the filtering mechanism enters the first gas storage mechanism and the second gas storage mechanism, and then the operation is carried out in the same way to obtain a detection signal S1 of the blank air of the first gas detection mechanism0The detection signal S2 of blank air of the second gas detection mechanism0Finally, the response signal S1 ═ S1 of the gas to be detected of the first gas detection mechanism is obtainedGeneral assembly－S10The response signal S2 ═ S2 of the gas to be detected in the gas detection mechanism twoGeneral assembly－S20；
When the air bag is used for air suction and sampling, the valve is normally closed, the pump III is opened, the air enters the storage mechanism I and the storage mechanism II, when in detection, the pump III is closed, and the detection step is the same as the expiration sampling step.
Of course, the specific detection sequence may be adjusted as long as S1 can be detectedGeneral assembly、S10、S2General assembly、S20And (4) finishing.
In specific implementation, the filtering mechanism can adopt active carbon or potassium permanganate loaded by alumina, the humidity balancing mechanism can adopt a nafion tube of Perma Pure in the United states, and the ozone generating mechanism can adopt ozone fittings KS-3G of Wangli (Foshan) environmental protection technology company Limited.
The utility model provides a break-make between the switching part is exactly the main effect of valve array one, two, lets in gaseous storage mechanism one, two with the gas sample that meets the requirements that the sampling pipe was gathered, makes the gas sample that does not meet the requirements that the sampling pipe was gathered pass through the evacuation pipe and emits into the atmosphere, and ozone generation mechanism intake pipe obtains through filterable gas let in ozone generation mechanism and produce ozone to and let in gaseous storage mechanism one, two as blank gas with the process filterable gas that ozone generation mechanism intake pipe obtained, the utility model discloses valve array one, two as long as can satisfy the above-mentioned effect of switching on can, can be a valve, also can be a plurality of valve combinations, do not restrict very much.
The utility model discloses a revise the mode and can carry out following operation along with the accumulation of data volume:
(1) obtaining a prior model database through calibration, wherein the process comprises the following steps: recording result values C1 and result values C2 corresponding to standard gases with different known concentrations and analysis parameters K1 of the gas detection mechanism 1 under different temperature and humidity conditions to form a standard gas result database; recording result values C1 and C2 corresponding to different exhalation values and analysis parameters K1 of the gas detection mechanism 1 under different temperature and humidity conditions, forming a test result database, calculating environmental temperature T (T), environmental humidity RH (T), result values C1(T), result values C2(T) and analysis parameters K1(T) of the gas detection mechanism 1 during real-time detection, and carrying out functional relation f between the environmental temperature T (0), the environmental humidity RH (0) and the initial analysis parameters K1 (0);
(2) the result value C1(t) is calculated by the environmental temperature T (t), the environmental humidity RH (t), the initial analysis parameter K1(0) and the functional relation f thereof in each detection, the result value is compared with the result value C2(t), whether the difference value of the two result values exceeds +/-Appb or +/-B percent is judged, if the difference value does not exceed the range, the calculation is successful, C1(t) is displayed, if the difference value exceeds the range, the calculation is failed, the final result displays the result value C2(t), the result record is put into another classifier, the failed data is subjected to reinforcement learning, the relevant characteristics of the failed data are learned, and the classifier and the existing function determine the result value C1 (t).
Use gaseous detection mechanism one to adopt the electrochemistry method to detect the principle, gaseous detection mechanism two adopts the chemiluminescence method to detect the principle, and the component to be measured is Nitric Oxide (NO) for example, uses standard gas concentration to verify the utility model discloses an accuracy, it is shown with 2 below to see as a result:
TABLE 1
TABLE 2
Can see through table 1 and 2, the utility model discloses a chemiluminescence method detection mechanism revises electrochemical method detection mechanism's testing result deviation in real time, and the accuracy is high, can guarantee higher detection accuracy.
It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.
Claims (8)
1. A gas detection system, characterized by: including the different gaseous detection mechanism one and the gaseous detection mechanism two of detection principle, still include gaseous sampling mechanism, gaseous storage mechanism one and gaseous storage mechanism two, the air inlet of gaseous storage mechanism one with the air inlet of gaseous storage mechanism two respectively with the gas outlet intercommunication of gaseous sampling mechanism, the gas outlet of gaseous storage mechanism one with gaseous detection mechanism one intercommunication, the gas outlet of gaseous storage mechanism two with gaseous detection mechanism two intercommunication.
2. The gas detection system of claim 1, wherein: the first gas detection mechanism is an electrochemical gas detection device, and the second gas detection mechanism is a chemiluminescent gas detection device.
3. The gas detection system of claim 1 or 2, wherein: and the first gas storage mechanism is connected with an exhaust pipe, and a valve is installed on the exhaust pipe.
4. The gas detection system of claim 1 or 2, wherein: the gas sampling mechanism comprises a sampling pipe, and a flow regulating valve, a pressure sensor and a flow velocity sensor are mounted on the sampling pipe.
5. The gas detection system of claim 1 or 2, wherein: and a humidity balance mechanism is connected between the first gas storage mechanism and the first gas detection mechanism.
6. The gas detection system of claim 1 or 2, wherein: still include ozone generation mechanism, gaseous detection mechanism two is the gaseous check out test set of chemiluminescence method, the gas outlet of gaseous storage mechanism two with be connected with the reaction chamber between the gaseous detection mechanism two, the gas outlet of ozone generation mechanism with the reaction chamber intercommunication.
7. The gas detection system of claim 6, wherein: the gas sampling mechanism comprises a sampling pipe, a gas outlet of the sampling pipe is communicated with a gas inlet of the first gas storage mechanism and a gas inlet of the second gas storage mechanism through a first valve array, a gas outlet of the ozone generating mechanism gas inlet pipe is communicated with a gas inlet of the ozone generating mechanism and a gas inlet of the emptying pipe through a second valve array, and the first valve array is communicated with the second valve array through a connecting pipe;
the first valve array is controllable, the gas outlet of the sampling pipe, the gas inlet of the first gas storage mechanism, the gas inlet of the second gas storage mechanism and the connection pipe are mutually connected and disconnected, the second valve array is controllable, the gas outlet of the ozone generation mechanism gas inlet pipe, the gas inlet of the ozone generation mechanism, the gas inlet of the emptying pipe and the connection pipe are mutually connected and disconnected.
8. The gas detection system of claim 7, wherein: the ozone generator comprises a gas storage mechanism I, a valve array II, an ozone generation mechanism I, a gas storage mechanism II and a gas detection mechanism II, wherein a pump I is connected between the gas storage mechanism I and the gas detection mechanism I, a pump II is connected between the valve array II and a gas inlet of the ozone generation mechanism, and a pump III is further included, and a gas inlet of the pump III is communicated with the gas storage mechanism I.
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| CN110554028A (en) * | 2019-10-18 | 2019-12-10 | 合肥美钛健康产业有限公司 | Gas detection method and gas detection system based on same |
| CN110554028B (en) * | 2019-10-18 | 2024-02-20 | 合肥微谷医疗科技有限公司 | Gas detection method and gas detection system based on same |
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