CN108254417B - Air detection device, air quality detection method, and computer-readable storage medium - Google Patents
Air detection device, air quality detection method, and computer-readable storage medium Download PDFInfo
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Abstract
The invention provides an air detection device, an air quality detection method and a computer readable storage medium, wherein the air quality detection method comprises the following steps: determining the service time of the microporous filtering module when the content of the detection gas of the specified type of gas is detected; generating attenuation compensation parameters according to the using time and a preset attenuation compensation formula; and performing correction operation on the detected gas content according to the attenuation compensation parameter to obtain the corrected gas content. Through the technical scheme of the invention, the content of the specified type of gas can be corrected according to the attenuation compensation parameters so as to reduce the probability of inaccurate detection caused by the blockage of the microporous filtering module.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an air detection device, an air quality detection method and a computer readable storage medium.
Background
In the related art, the air detection device generally implements component identification and content detection of one or more specified gases according to surface oxidation and resistance value change by arranging a semiconductor or chemical membrane. Due to the complexity and diversity of gas species in the atmospheric environment, the mixed distribution of multiple gases in the actual detection environment causes the following defects in the detection process of the specified type of gas:
(1) when the gas of the designated type is detected, due to the existence of interference substances, the detection value obtained by the gas sensor is easy to cause deviation, and the relative numerical value and the absolute numerical value of the sensor are invalid when the deviation is overlarge.
(2) The adoption of one sensor to detect a plurality of gases has larger errors and defects.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
Therefore, one objective of the present invention is to provide a novel air detection device, in which a microporous filter module is added to filter a gas to be detected through the microporous filter module, so as to filter interfering substances that interfere with detection of a specific type of gas, and the filtered gas to be detected is delivered to a gas sensitive sensing module, so as to detect the content of the specific type of gas in the gas to be detected through the gas sensitive sensing module, thereby reducing interference of a non-detection type of gas in detection on detection of the specific type of gas, and correspondingly improving accuracy of content detection on the specific type of gas.
The invention further aims to correspondingly provide an air quality detection method.
It is a further object of the present invention to provide an air detection device and a computer-readable storage medium therefor.
To achieve at least one of the above objects, according to a first aspect of the present invention, there is provided an air detection device including: the air inlet is used for introducing gas to be detected; the microporous filtering module is arranged corresponding to the air inlet and is used for filtering the gas to be detected so as to filter out at least one interference substance; and the gas-sensitive sensing module is arranged corresponding to the microporous filtering module and is used for detecting the content of the specified type of gas in the gas to be detected.
In this technical scheme, through increasing the millipore filtration module on air quality detection device's among the prior art basis, with will wait to detect gaseous filtering through the millipore filtration module, thereby filter and cause the interfering substance of interference to appointed type gas detection, will wait to detect after filtering and carry to gas sensitive sensing module, with detect the content of appointed type gas in waiting to detect gaseous through gas sensitive sensing module, and then reduced the interference of non-detection type gas to appointed type gas detection in the testing process, the accuracy to the content detection of appointed type gas has correspondingly been promoted.
Through setting up the filtration interference material of microfiltration module, when detecting the gas of different grade type, adopt the microfiltration module of different characteristics, realized the specificity to appointed type gas detection to reduce the detection error that exists among the prior art.
The specified type of gas may be formaldehyde (HCOH), benzene, sulfur dioxide, nitrogen dioxide, and the like.
In addition, the air inlet, the microporous filtering module and the gas-sensitive sensing module are sequentially arranged according to the gas flow direction.
In the above technical solution, preferably, the method further includes: and the processor is connected to the gas-sensitive sensing module and used for determining the passing rate of the gas to be detected passing through the microporous filtering module according to the service time of the microporous filtering module and a preset attenuation compensation formula, so as to generate an attenuation compensation parameter according to the passing rate and correct the content according to the attenuation compensation parameter.
In the technical scheme, through setting up the treater, on the one hand, can adopt the timing function record microporous filter module's live time of treater, on the other hand, along with the time lapse, because the surface of microporous filter module can deposit the foreign matter granule, consequently it is also progressively worse also to wait to detect the gas trafficability characteristic at microporous filter module, the treater can confirm corresponding transmittance according to the live time of microporous filter module and preset attenuation compensation formula, and generate the attenuation compensation parameter according to the transmittance, and then can carry out the correction of appointed type gas content according to the attenuation compensation parameter, with the inaccurate probability of detection that reduces because microporous filter module blocks up and causes.
In any of the above technical solutions, preferably, the method further includes: the device comprises a device box body, wherein one side of the device box body is provided with an air inlet, a microporous filtering module is arranged on the air inlet, and an air-sensitive sensing module is arranged in the device box body; the other side of the device box body corresponds to the air inlet and is provided with an air outlet, and the air outlet is used for guiding out the detected gas.
In this technical scheme, through constructing the empty gas detection survey device as the box body structure, the income wind gap has been seted up to one side at the device box body, the air outlet has been seted up at the opposite side that corresponds, in order to realize the gas circulation, the department sets up the millipore filtration module at the income wind gap, set up gas sensitive sensing module in going into the wind gap, in order to wait to detect after will filtering through the millipore filtration module and detect gaseous leading-in gas sensitive sensing module, realize the leakproofness of gas detection process through the box body structure, in order to prevent that outside unfiltered gas from transmitting to gas sensitive sensing module and causing the interference to the gaseous detection of appointed type.
In any of the above technical solutions, preferably, the method further includes: the air channel flow guide module is arranged outside the device box body and connected to the air inlet, and comprises a flow guide fan which is used for discharging the gas to be detected into the air inlet.
In the technical scheme, the air channel flow guide module is arranged on the microporous filter module, the air channel flow guide module can comprise a flow guide fan, under the driving of the flow guide fan, the external gas to be detected enters the microporous filter module through the air inlet to be filtered, the filtered gas is guided into the gas-sensitive sensing module in the device box body, the detection of the components and the content of the specified type of gas is realized, after the detection operation is completed, the gas is discharged through the air outlet under the further driving of the flow guide fan, and the air guide circulation is formed in the detection process.
In any of the above technical solutions, preferably, the microporous filter module includes a plurality of layers of microporous filter paper, and the plurality of layers of microporous filter paper include at least one of a microporous filter membrane, an ion filter membrane, and a molecular filter membrane, where the microporous filter membrane is configured to filter dust, the ion filter membrane is configured to filter a volatile interference gas, and the molecular filter membrane is configured to filter an interference substance whose molecular diameter is larger than a specified type of gas.
In this technical scheme, the micropore filtration module can include multilayer micropore filter paper, wherein, micropore filter paper can include multilayer micropore filter paper, including at least one of microfiltration membrane, ion filtration membrane and molecular filtration membrane, for example, when appointed type gas is water-insoluble gas, adopt water-soluble micropore filter paper to filter water-soluble interference substance, and then can adopt different micropore filter paper according to the gas of different grade type, in order to carry out the filtration step according to the size of gas molecule, and/or carry out the filtration step according to characteristics such as solubility, when keeping the appointed type gas of treating the measuring, can improve measuring flexibility, measuring range and measurement accuracy.
In any one of the above technical solutions, preferably, the gas sensing module includes: and the semiconductor gas sensitive element is connected to the processor, wherein the processor determines the content of the specified type of gas according to the resistance value change of the semiconductor gas sensitive element.
In the technical scheme, the gas sensing module is set as a semiconductor gas sensitive element, a gas sensitive film for adsorbing specified type of gas is coated on the surface of a piezoelectric crystal of the gas sensitive element, the quality and the conductivity of the film layer of the gas sensitive film are changed through the interaction of the gas sensitive film and the specified type of gas, the acoustic surface wave frequency of the piezoelectric crystal is caused to drift, the gas concentrations are different, the quality and the conductivity change degrees of the film layer are also different, namely, the acoustic surface wave frequency is caused to change differently, and the content of the specified type of gas is determined by measuring the change of the frequency of the super-generated surface wave.
According to a second aspect of the present invention, there is provided an air quality detection method, comprising: determining the service time of the microporous filtering module when the content of the detection gas of the specified type of gas is detected; generating attenuation compensation parameters according to the using time and a preset attenuation compensation formula; and performing correction operation on the detected gas content according to the attenuation compensation parameter to obtain a corrected gas content.
In the technical scheme, along with the lapse of time, because the surface of the microporous filtering module can deposit impurity particles, the trafficability of the gas to be detected in the microporous filtering module is increasingly poor, the service time of the microporous filtering module is recorded, the corresponding transmittance is determined according to the service time of the microporous filtering module and a preset attenuation compensation formula, attenuation compensation parameters are generated according to the transmittance, and then the content of the specified type of gas can be corrected according to the attenuation compensation parameters, so that the probability of inaccurate detection caused by the blockage of the microporous filtering module is reduced.
In the above technical solution, preferably, the preset attenuation compensation formula is: and y is 1-ln2x, wherein y is an attenuation compensation parameter, and x is the service time.
In the technical scheme, the microporous filter module comprises a plurality of layers of microporous filter paper, the filtering operation is continuously performed along with the plurality of layers of microporous filter paper, the trafficability of the filter paper is reduced due to the deposition of interference particles, a fitting curve can be drawn according to experimental data of the trafficability of the microporous filter paper, a preset attenuation compensation formula is determined according to the fitting curve, namely the fitting curve is approximately y-1-ln 2x, y is a percentage for representing the permeability and is used as an attenuation compensation parameter, and x is the service time, so that the corresponding attenuation compensation parameter can be determined according to the service time of the microporous filter module, the compensation calculation is performed according to the attenuation compensation parameter, and the accuracy of the content detection of the specified type of gas is further improved.
In any of the above technical solutions, preferably, the performing a correction operation on the detected gas content according to the attenuation compensation parameter to obtain a corrected gas content specifically includes: performing a correction operation on the gas content according to a correction formula, wherein the correction formula is
S' is the corrected gas content and S is the detected gas content.
In the technical scheme, the percentage for representing the permeability is used as the attenuation compensation parameter, the larger the attenuation compensation parameter is, the smaller the correction amount of the gas content is, the smaller the attenuation compensation parameter is, the larger the correction amount of the gas content is, and therefore the accurate correction of the gas content detection value is realized.
For example, when the percentage of the permeability of the filter paper is calculated to be 50% when the content of formaldehyde gas is detected, the data is fed back to the processor, and the inverse proportion of the percentage is used as a correction factor, that is, the content of formaldehyde gas is closer to twice of the measured data actually.
In any of the above technical solutions, preferably, when the gas content of the specified type of gas is detected, before determining the usage time of the microfiltration module, the method further includes: detecting the resistance value variation of a semiconductor gas sensitive element in the air detection device; and determining the content of the detected gas according to the resistance value variation.
In the technical scheme, a gas-sensitive film for adsorbing specified type gas is coated on the surface of a piezoelectric crystal of a gas-sensitive element, the gas-sensitive film and the specified type gas interact with each other, so that the film quality and the conductivity of the gas-sensitive film are changed, the surface acoustic wave frequency of the piezoelectric crystal is caused to drift, the gas concentrations are different, the film quality and the conductivity change degrees are different, namely the surface acoustic wave frequency is caused to change differently, and the detection function of the content of the specified type gas is realized by measuring the resistance value change quantity of the gas-sensitive element to correspond to the change of the surface acoustic wave frequency.
According to a third aspect of the present invention, there is provided an air detection apparatus comprising: a processor; a memory for storing executable instructions of the processor, wherein the processor is configured to implement the steps of the air quality detection method according to any one of the above-mentioned solutions of the second aspect when executing the executable instructions stored in the memory.
According to a fourth aspect of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the air quality detection method according to any one of the above-mentioned solutions of the second aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic block diagram of an air detection unit of one embodiment of the present invention;
FIG. 2 is a partial schematic view of an air detection unit according to an embodiment of the present invention;
FIG. 3 shows a schematic flow diagram of an air quality detection method of one embodiment of the present invention;
FIG. 4 shows a schematic flow diagram of an air quality detection method of another embodiment of the present invention;
FIG. 5 illustrates a fitted graph characterizing a relationship between throughput and usage time in accordance with a specific embodiment of the present invention;
fig. 6 shows a schematic block diagram of an air detection device of another embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The air detection device according to the first embodiment of the present invention will be specifically described with reference to fig. 1 and 2.
As shown in fig. 1, an air detection apparatus according to an embodiment of the present invention includes: an air detection device comprising: the air inlet is used for introducing gas to be detected; the microporous filtering module 102 is arranged corresponding to the air inlet, and the microporous filtering module 102 is used for filtering the gas to be detected so as to filter out at least one interference substance; and the gas-sensitive sensing module 104 is arranged corresponding to the microporous filtering module 102, and the gas-sensitive sensing module 104 is used for detecting the content of the specified type of gas in the gas to be detected.
In this embodiment, the microporous filter module 102 is added on the basis of the air quality detection device in the prior art, so that the gas to be detected is filtered through the microporous filter module 102, thereby filtering out interfering substances which interfere with the detection of the specified type of gas, and the filtered gas to be detected is conveyed to the gas sensitive sensor module 104, so that the content of the specified type of gas in the gas to be detected is detected through the gas sensitive sensor module 104, thereby reducing the interference of the non-detected type of gas on the detection of the specified type of gas in the detection process, and correspondingly improving the accuracy of the content detection of the specified type of gas.
On the other hand, by arranging the microporous filtering module 102 to filter interfering substances, when different types of gases are detected, the microporous filtering module 102 with different characteristics is adopted, so that the specificity of detecting the specified type of gases is realized, and the detection error in the prior art is reduced.
Wherein the interfering substance comprises dust particles and interfering gas.
The specified type of gas may be formaldehyde (HCOH), benzene, sulfur dioxide, nitrogen dioxide, and the like.
In addition, the air inlet, the microporous filter module 102 and the gas sensor module 104 are sequentially arranged according to the gas flow direction.
In the above embodiment, preferably, the method further includes: and the processor is connected to the gas-sensitive sensing module and is used for determining the passing rate of the gas to be detected passing through the microporous filtering module 102 according to the service time of the microporous filtering module 102 and a preset attenuation compensation formula, so as to generate an attenuation compensation parameter according to the passing rate and correct the content according to the attenuation compensation parameter.
In this embodiment, by providing the processor, on one hand, the use time of the microfiltration module 102 can be recorded by using the timing function of the processor, and on the other hand, as the time elapses, the gas to be detected is increasingly poor in passing performance of the microfiltration module 102 due to the deposition of the impurity particles on the surface of the microfiltration module 102, the processor can determine the corresponding transmittance according to the use time of the microfiltration module 102 and the preset attenuation compensation formula, and generate the attenuation compensation parameter according to the transmittance, and further correct the content of the specified type of gas according to the attenuation compensation parameter, so as to reduce the probability of inaccurate detection caused by the blockage of the microfiltration module 102.
Specifically, taking formaldehyde gas as an example, the passing performance of formaldehyde gas becomes worse and worse as time goes by, and the content of formaldehyde is subjected to supplementary calculation according to a fitted curve to realize the content correction.
As shown in fig. 1, in any of the above embodiments, preferably, the method further includes: the device comprises a device box body 106, wherein one side of the device box body 106 is provided with an air inlet, the air inlet is provided with a microporous filtering module 102, and the device box body 106 is internally provided with a gas-sensitive sensing module 104; an air outlet 108 is formed in the other side of the device box body 106 and corresponds to the air inlet, and the air outlet 108 is used for guiding out the detected gas.
In this embodiment, by configuring the air detection device as a box structure, an air inlet is opened at one side of the device box 106, and an air outlet 108 is opened at the other corresponding side, so as to realize gas circulation, a microporous filter module 102 is disposed at the air inlet, and a gas sensitive sensor module 104 is disposed in the air inlet, so as to introduce the gas to be detected filtered by the microporous filter module 102 into the gas sensitive sensor module 104, and realize the sealing property of the gas detection process by the box structure, so as to prevent the transmission of the external unfiltered gas to the gas sensitive sensor module 104 from causing interference to the detection of the specified type of gas.
As shown in fig. 1, in any of the above embodiments, preferably, the method further includes: the air duct guiding module 110 is disposed outside the device box 106 and connected to the air inlet, and the air duct guiding module 110 includes a guiding fan for discharging the gas to be detected into the air inlet.
In this embodiment, the air duct guiding module 110 is disposed on the microporous filter module 102, the air duct guiding module 110 may include a guiding fan, and under the driving of the guiding fan, the external gas to be detected enters the microporous filter module 102 through the air inlet to be filtered, and the filtered gas is introduced into the gas-sensitive sensor module 104 in the device case 106, so as to detect the components and content of the specified type of gas, and after the detection operation is completed, the gas is further driven by the guiding fan to be discharged through the air outlet 108, so as to form an air guiding cycle in the detection process.
In any of the above embodiments, as shown in fig. 2, preferably, the microfiltration module 102 comprises: multilayer micropore filter paper, including at least one of microfiltration membrane 1022, ion filtration membrane 1024 and molecular filtration membrane 1026, wherein, microfiltration membrane 1022 sets up in outermost layer for the filtering dust, and ion filtration membrane 1024 sets up in the intermediate level for filter volatility's interfering gas, and molecular filtration membrane 1026 sets up in innermost layer for the filtering molecule diameter is greater than the interfering substance of appointed type gas.
In this technical solution, the microporous filter module may include a plurality of layers of microporous filter paper, wherein the microporous filter paper may include a plurality of layers of microporous filter paper including at least one of the microporous filter membrane 1022, the ion filter membrane 1024, and the molecular filter membrane 1026, which can improve the flexibility, the measurement range, and the measurement accuracy of the measurement while maintaining the specified type of gas to be detected.
To detect formaldehyde (CH)2O) content, for example, filtering interfering particles such as PM2.5 and PM10 with the microporous filtering membrane 1022, filtering water-soluble interfering substances such as ethanol and hydrogen sulfide with the water-soluble ion filtering membrane 1024 when the specified type of gas is water-insoluble, and further filtering the water-insoluble benzene (C6H6) particles which cannot be filtered by the microporous filtering membrane 1022 and are insoluble in water with the different molecular filtering membranes 1026 according to the different types of gases.
The microfiltration membrane 1022 may be Polytetrafluoroethylene (PTFE), the ion filtration membrane 1024 may be a reverse osmosis membrane, and the molecular filtration membrane 1026 may be an inorganic membrane or an organic polymer membrane.
In any of the above embodiments, preferably, the gas sensing module 104 includes: and the semiconductor gas sensitive element is connected to the processor, wherein the processor determines the content of the specified type of gas according to the resistance value change of the semiconductor gas sensitive element.
In the embodiment, the gas sensing module is set as a semiconductor gas sensor, a gas-sensitive film for absorbing specified type of gas is coated on the surface of a piezoelectric crystal of the gas sensor, the film quality and the conductivity of the gas-sensitive film are changed through the interaction of the gas-sensitive film and the specified type of gas, the acoustic surface wave frequency of the piezoelectric crystal is caused to drift, the gas concentrations are different, the film quality and the conductivity change degrees are different, namely, the acoustic surface wave frequency is caused to change differently, and the content of the specified type of gas is determined by measuring the change of the ultrasonic surface wave frequency.
The air quality detecting method according to the second embodiment of the present invention will be specifically described below with reference to fig. 3 to 5.
As shown in fig. 3, an air quality detecting method according to an embodiment of the present invention includes: step 302, determining the service time of the microporous filtering module when the detected gas content of the specified type of gas is detected; step 304, generating attenuation compensation parameters according to the use time and a preset attenuation compensation formula; and step 306, performing a correction operation on the detected gas content according to the attenuation compensation parameter to obtain a corrected gas content.
In the embodiment, as time goes by, impurity particles are deposited on the surface of the microporous filtering module, so that the passing performance of the gas to be detected in the microporous filtering module is increasingly poor, the service time of the microporous filtering module is recorded to determine the corresponding transmittance according to the service time of the microporous filtering module and a preset attenuation compensation formula, and an attenuation compensation parameter is generated according to the transmittance, so that the content of the specified type of gas can be corrected according to the attenuation compensation parameter, and the probability of inaccurate detection caused by the blockage of the microporous filtering module is reduced.
In the above embodiment, preferably, the preset attenuation compensation formula is: and y is 1-ln2x, wherein y is an attenuation compensation parameter, and x is the service time.
In this embodiment, the microporous filter module includes a plurality of layers of microporous filter paper, and as the plurality of layers of microporous filter paper continuously perform a filtering operation, the filter paper has a reduced passability due to the deposition of interfering particles, as shown in fig. 5, a plurality of points are drawn according to experimental data of the passability of the microporous filter paper, a fitting curve is correspondingly drawn according to the plurality of points, so as to determine a preset attenuation compensation formula according to the fitting curve, that is, the fitting curve is approximately y ═ 1-ln2x, y is a percentage for representing permeability and is used as an attenuation compensation parameter, and x is a service time, so that a corresponding attenuation compensation parameter can be determined according to the service time of the microporous filter module, so as to perform compensation calculation according to the attenuation compensation parameter, and further improve the accuracy of content detection of a.
In any of the above embodiments, preferably, the performing a correction operation on the detected gas content according to the attenuation compensation parameter to obtain a corrected gas content specifically includes: performing a correction operation on the gas content according to a correction formula, wherein the correction formula is
S' is the corrected gas content and S is the detected gas content.
In this embodiment, by using the percentage for representing the permeability as the attenuation compensation parameter, the larger the attenuation compensation parameter is, the smaller the correction amount of the gas content is, and the smaller the attenuation compensation parameter is, the larger the correction amount of the gas content is, thereby achieving accurate correction of the detected value of the gas content.
For example, when the percentage of the permeability of the filter paper is calculated to be 50% when the content of formaldehyde gas is detected, the data is fed back to the processor, and the inverse proportion of the percentage is used as a correction factor, that is, the content of formaldehyde gas is closer to twice of the measured data actually.
In any of the above embodiments, preferably, before determining the usage time of the microfiltration module when detecting the gas content of the specified type of gas, the method further includes: detecting the resistance value variation of a semiconductor gas sensitive element in the air detection device; and determining the content of the detected gas according to the resistance value variation.
In the embodiment, a gas-sensitive film for adsorbing specified type of gas is coated on the surface of a piezoelectric crystal of a gas-sensitive element, the interaction between the gas-sensitive film and the specified type of gas changes the film quality and the conductivity of the gas-sensitive film, the acoustic surface wave frequency of the piezoelectric crystal drifts, the gas concentrations are different, and the film quality and the conductivity change degrees are different, namely the acoustic surface wave frequency changes are different, and the function of detecting the content of the specified type of gas is realized by measuring the resistance value change quantity of the gas-sensitive element of a conductor to correspond to the change of the ultrasonic surface wave frequency.
As shown in fig. 4, the air quality detection method according to another embodiment of the present invention, taking the calculation of the formaldehyde content in the air as an example, specifically includes the following steps: step 402, enabling air in the air duct to pass through the multi-layer microporous filter paper and rapidly reach a dynamic balance state; step 404, calculating the content of the specified type of gas to be measured currently by the gas-sensitive resistor according to the change of the resistance value; step 406, calculating the passing rate of the gas passing through the filter paper according to the using time according to the attenuation compensation formula of the filter paper passing performance so as to compensate the error according to the passing rate; and step 408, transmitting the compensated parameters to a processor, and calculating the content percentage of the specified type of gas again in a comprehensive manner, specifically S/y, wherein S is the calculated formaldehyde content, and y is the passing rate obtained according to days.
In the embodiment, by arranging the multi-layer microporous filter paper, the interference substances influencing the detection can be filtered, so that the detection precision of the content of the specified type of gas is improved; according to the relationship between the trafficability of the filter paper and the time, compensation calculation is performed on the detection value of the gas, so that the detection error caused by filter paper leakage stoppage is reduced; according to different specified types of gas to be detected, different layers of microporous filter paper are used, on one hand, larger-grained interfering substances can be filtered according to the size of gas molecules, on the other hand, gases with different solubilities with formaldehyde gas can be filtered according to the characteristics such as solubility, and therefore the flexibility, range and precision of measurement are improved.
Fig. 6 shows a schematic block diagram of an air detection apparatus of a third embodiment of the present invention.
As shown in fig. 6, the air detection apparatus 60 according to the third embodiment of the present invention includes a processor 602 and a memory 604, wherein the memory 604 stores a computer program operable on the processor 602, wherein the memory 604 and the processor 602 may be connected by a bus, and the processor 602 is configured to implement the steps of the air quality detection method as described in the above embodiment when executing the computer program stored in the memory 604.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The unit modules in the air quality detection method provided by the embodiment of the invention can be combined, divided and deleted according to actual needs.
According to an embodiment of the present invention, a computer-readable storage medium is proposed, on which a computer program is stored which, when being executed by a processor, carries out the steps of the air quality detection method as described in the above embodiments.
Further, it will be understood that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
The technical scheme of the invention is explained in detail in the above with the help of the attached drawings, and the technical scheme can filter the interference substances which have influences on the detection by arranging the multi-layer microporous filter paper, so that the detection precision of the content of the specified type of gas is improved; according to the relationship between the trafficability of the filter paper and the time, compensation calculation is performed on the detection value of the gas, so that the detection error caused by filter paper leakage stoppage is reduced; according to different specified types of gas to be detected, different layers of microporous filter paper are used, on one hand, larger-grained interfering substances can be filtered according to the size of gas molecules, on the other hand, gases with different solubilities with formaldehyde gas can be filtered according to the characteristics such as solubility, and therefore the flexibility, range and precision of measurement are improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An air detection device, comprising:
the air inlet is used for introducing gas to be detected;
the microporous filtering module is arranged corresponding to the air inlet and is used for filtering the gas to be detected so as to filter out at least one interference substance;
the gas-sensitive sensing module is arranged corresponding to the microporous filtering module and is used for detecting the content of the specified type of gas in the gas to be detected;
the processor is connected to the gas-sensitive sensing module and used for determining the passing rate of the gas to be detected passing through the microporous filtering module according to the service time of the microporous filtering module and a preset attenuation compensation formula so as to generate attenuation compensation parameters according to the passing rate and execute correction operation on the gas content according to a correction formula,
wherein the preset attenuation compensation formula is as follows: y is 1-ln2x, wherein y is the attenuation compensation parameter, x is the usage time, and the correction formula is
S' is the corrected gas content, and S is the detected gas content.
2. The air detection device of claim 1, further comprising:
the device box body is provided with the air inlet at one side, the microporous filtering module is arranged on the air inlet, and the gas-sensitive sensing module is arranged in the device box body;
and an air outlet is formed in the other side of the device box body and corresponds to the air inlet, and the air outlet is used for guiding out the detected gas.
3. The air detection device of claim 2, further comprising:
the air channel diversion module is arranged outside the device box body and connected to the air inlet, and comprises a diversion fan which is used for discharging the gas to be detected into the air inlet.
4. The air detection device of claim 1, wherein the micro-porous filtration module comprises:
the multi-layer microporous filter paper comprises at least one of a microporous filtering membrane, an ion filtering membrane and a molecular filtering membrane,
the micro-pore filtering membrane is used for filtering dust, the ion filtering membrane is used for filtering volatile interference gas, and the molecular filtering membrane is used for filtering the interference substance with the molecular diameter larger than the specified type of gas.
5. The air detection device of any one of claims 1 to 4, wherein the gas sensing module comprises:
a semiconductor gas sensor connected to the processor,
and the processor determines the content of the specified type of gas according to the resistance value change of the semiconductor gas sensitive element.
6. An air quality detection method applied to the air detection apparatus according to any one of claims 1 to 5, characterized by comprising:
determining the service time of the microporous filtering module when the content of the detection gas of the specified type of gas is detected;
generating attenuation compensation parameters according to the service time and a preset attenuation compensation formula;
performing correction operation on the detected gas content according to the attenuation compensation parameter to obtain corrected gas content;
the preset attenuation compensation formula is as follows: 1-ln2x, wherein y is the attenuation compensation parameter and x is the usage time;
the performing a correction operation on the detected gas content according to the attenuation compensation parameter to obtain a corrected gas content specifically includes:
performing a correction operation on the gas content according to a correction formula,
wherein the correction formula is
And S' is the corrected gas content, and S is the detected gas content.
7. The air quality detection method according to claim 6, wherein before determining the usage time of the microporous filter module when the gas content of the specified type of gas is detected, the method further comprises:
detecting resistance value variation of a semiconductor gas sensitive element in the air detection device;
and determining the content of the detection gas according to the resistance value variation.
8. An air detection device, comprising:
a processor;
memory for storing executable instructions of the processor, wherein the processor is adapted to carry out the steps of the method according to claim 6 or 7 when executing the executable instructions stored in the memory.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to claim 6 or 7.
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| CN111006918B (en) * | 2019-12-19 | 2021-03-05 | 深圳市政科检测有限公司 | Intelligent monitoring instrument for organic pollutants in atmospheric environment |
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| CN1477387A (en) * | 2003-05-22 | 2004-02-25 | 上海交通大学 | Indoor air detection and purifying equipment |
| US7129847B2 (en) * | 2003-08-06 | 2006-10-31 | Edwards Systems Technology, Inc. | Detector with dust filter and airflow monitor |
| CN102109487B (en) * | 2009-12-28 | 2013-06-05 | 华瑞科学仪器(上海)有限公司 | Ultra-low concentration gas sensor |
| GB201321245D0 (en) * | 2013-12-02 | 2014-01-15 | Univ Ireland Dublin | Gas sensor |
| CN103675206B (en) * | 2013-11-27 | 2015-06-10 | 中国船舶重工集团公司第七一八研究所 | System for detecting sulfur hexafluoride |
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| CN206626752U (en) * | 2017-01-16 | 2017-11-10 | 广东美的制冷设备有限公司 | The monitoring device of air purifier and its airstrainer service life |
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