CN113075264A - Method and device for calculating odor concentration value through sensor signal value fitting - Google Patents
Method and device for calculating odor concentration value through sensor signal value fitting Download PDFInfo
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Abstract
The invention discloses a method for calculating an odor concentration value through sensor signal value fitting, which comprises the following steps: acquiring resistance values of a plurality of sensors of gas to be detected, and preprocessing the resistance value of each sensor to obtain a plurality of sensor signal values; selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor according to each sensor signal value, and calculating the sensor signal fitting value of the gas substance correspondingly responded by each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor have different sensor signal value ranges respectively; according to a gas acquisition scene to be detected, acquiring respective weights of sensor signal fitting values of gas substances respectively corresponding to a plurality of sensors; and weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively. The invention can accurately and directly detect the concentration value of the odor in the gas.
Description
Technical Field
The present invention relates to the field of environmental monitoring. More particularly, the present invention relates to a method and apparatus for calculating odor concentration values by fitting sensor signal values.
Background
Malodorous gas is a gas pollutant which is offensive, harms human health and is more common in indoor and outdoor air. In recent years, discontent emotions and counseling events caused by various abnormal odors have been increasing. In China, on one hand, the production is vigorously developed to meet the requirement of improving the living standard of people, the discharge amount of three wastes is increased, and the problem of malodor becomes increasingly serious; on the other hand, with the improvement of the living standard of people, people are more sensitive to the environment, especially to the pollution caused by the odor, and the odor disturbing events have also occurred frequently, so the research and the monitoring on the odor have attracted the high attention of the government of China, and the odor gas monitor is produced at the same time.
In the national standard method, namely three-point comparison type odor bag method GB/T14675-93 for measuring air quality and odor, a method for measuring by using an olfactory dialer and a judge through a manual method is introduced, wherein a person needs to smell a sample through the nose, the olfactory dialer has certain personal injury, and the method is not suitable for long-time continuous online monitoring.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
It is still another object of the present invention to provide a method and apparatus for calculating an odor concentration value by fitting sensor signal values, which can accurately and directly detect the odor concentration value and can perform continuous on-line monitoring.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a method of calculating an odor concentration value by sensor signal value fitting, comprising:
the method comprises the steps of obtaining a plurality of sensor resistance values of gas to be detected, preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and measuring the plurality of sensor resistance values by a plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor according to each sensor signal value, and calculating the sensor signal fitting value of the gas substance correspondingly responded by each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor have different sensor signal value ranges respectively;
according to a gas acquisition scene to be detected, acquiring respective weights of sensor signal fitting values of gas substances respectively corresponding to a plurality of sensors;
and weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
Preferably, the method of preprocessing the resistance value of each sensor includes: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0The resistance value of the sensor under the odorless gas environment is acquired in advance.
Preferably, the respective weights of the sensor signal fit values of the plurality of sensors corresponding to the respective responsive gas species are preset.
Preferably, the plurality of sensors are each user-input with a respective weight corresponding to a sensor signal fit value of the responsive gas species.
The invention also provides a device for calculating the odor concentration value by fitting the sensor signal value, which comprises the following components:
the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring a plurality of sensor resistance values of gas to be detected and preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and the plurality of sensor resistance values are obtained by measuring a plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
the data processing module is used for selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance corresponding to the sensor according to each sensor signal value, calculating the sensor signal fitting value of the gas substance corresponding to each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance corresponding to the sensor have different sensor signal value ranges;
the weight configuration module is used for acquiring respective weights of sensor signal fitting values of gas substances which respectively correspond to the plurality of sensors according to a scene of acquiring the gas to be detected;
and the calculation module is used for weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
Preferably, the method for preprocessing the resistance value of each sensor by the data acquisition module comprises the following steps: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0The resistance value of the sensor under the odorless gas environment is acquired in advance.
Preferably, the weight of each of the sensor signal fitting values of the plurality of sensors corresponding to the gas substance to which the sensor signal is responsive is preset in the weight configuration module.
Preferably, the weight configuration module is configured to input the weight of each of the sensor signal fitting values of the plurality of sensors corresponding to the gas substance to be responded to by the user.
The present invention also provides an electronic device, comprising: the system comprises at least one processor and a memory communicatively connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to cause the at least one processor to execute the method.
The invention also provides a storage medium on which a computer program is stored which, when executed by a processor, implements the method described above.
The invention at least comprises the following beneficial effects: calibration curves are respectively preset in different sensor signal value ranges of each sensor, so that the sensor signal fitting values of gas substances corresponding to the sensors can be calculated more accurately according to the response characteristics of the sensors, and the odor concentration value can be monitored continuously and online for a long time by replacing manpower with electronic equipment. Through actual detection, compared with an artificial olfactory discrimination numerical value, the deviation of the result is less than 5%, and the method can be well used for monitoring the concentration of the odor in the ambient air.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
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FIG. 1 is a flow chart of a method of calculating odor concentration values by sensor signal value fitting according to the present invention;
fig. 2 is a data processing flow chart of the method of calculating an odor concentration value by sensor signal value fitting according to the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for calculating an odor concentration value by fitting sensor signal values, the method being applied to an electronic device, the electronic device including: the system comprises at least one processor and a memory communicatively connected with the at least one processor, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to cause the at least one processor to execute the method.
A memory as a storage medium having stored thereon a computer program which, when executed by a processor, implements the method of calculating an odor concentration value by sensor signal value fitting as described in embodiments of the present invention.
The method for calculating the odor concentration value through sensor signal value fitting comprises the following steps:
s101, acquiring resistance values of a plurality of sensors of gas to be detected, preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and measuring the resistance values of the plurality of sensors by the plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
the method for preprocessing the resistance value of each sensor comprises the following steps: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0The resistance value of the sensor under the odorless gas environment is acquired in advance.
The odorless gas may be air filtered by activated carbon.
The sensor is generally a MEMS-MOS sensor.
S102, selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of a gas substance correspondingly responded by a sensor according to each sensor signal value, and calculating a sensor signal fitting value of the gas substance correspondingly responded by each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor have different sensor signal value ranges respectively;
here, since each sensor responds to only one type of gas species in the gas to be measured, calibration curves need to be determined separately for the sensor signal values of each sensor and the sensor signal fit values of the gas species to which the sensor responds.
The calibration curve of the sensor signal value and the sensor signal fitting value of the gas substance corresponding to the sensor response is obtained by measuring and calculating in advance, and the measuring and calculating method comprises the following steps: the calibration curve can be obtained by detecting a series of same gas substances with different concentrations (concentration values determined by artificial sniffing) by using a sensor responding to the gas substances to obtain a series of sensor resistance values, then processing the series of sensor resistance values into sensor signal values, and then fitting the sensor signal values with the concentration values of the gas substances by a curve.
The same gas substance has different concentrations, the response characteristics of the sensor are different, the response of the sensor is accurate in some concentration intervals, the obtained measured value is accurate, the response of the sensor is possibly dull or excessively sensitive in other concentration intervals, and the deviation of the obtained measured value is large.
S103, acquiring respective weights of sensor signal fitting values of gas substances which respectively correspond to the plurality of sensors according to a scene of gas to be detected;
here the gas acquisition scenario to be measured includes: chemical plants, sewage treatment plants, sewage pumping stations, waste incineration plants, livestock and poultry farms, and the like,
the respective weights of the sensor signal fitting values of the gas substances respectively corresponding to the responses of the plurality of sensors are preset, namely a set of weight values is preset for each scene, and the gas to be detected is obtained from which scene, and then the set of weight values corresponding to the scene is selected for subsequent calculation.
The respective weights of the sensor signal fitting values of the gas substances respectively corresponding to the responses of the plurality of sensors can also be input by a user, and the user can define the weight of the concentration value of the gas substance corresponding to the response of each sensor according to actual requirements.
In addition, the user can partially modify a set of preset weight values according to actual requirements.
And S104, weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
The method for calculating the odor concentration value by fitting the sensor signal values will be described below in detail.
As shown in fig. 2, 4 MEMS-MOS sensors (respectively named as MM-1, MM-2, MM-3, and MM-4) are used to detect the gas to be detected in the chemical plant area, the sensor signal value calculated from the sensor resistance value measured by the sensor 1 is 1.2, and 3 calibration curves of the gas substance corresponding to the sensor 1 are selectable (respectively named as curve1-1, curve1-2, and curve1-3), and the range of the sensor signal value of curve1-1 is: 0.81 to 1.30; the range of the sensor signal value of curve1-2 is as follows: 1.31 to 2.10; the range of the sensor signal value of curve1-3 is as follows: 2.11 or more.
Then the sensor signal value calculated from the sensor resistance value measured by the sensor 1 is selected as curve1-1, the curve fitting equation of curve1 is that y is 2.13x-0.2, the sensor signal value 1.2 is substituted into x, and the sensor signal fitting value y of the gas substance corresponding to the response of the sensor 1 is calculated1Comprises the following steps: 2.34.
similarly, the sensor signal value calculated from the sensor resistance values measured by the sensors 2 to 4 can also be used for obtaining the sensor signal fitting value y of the gas substance corresponding to the response of each sensor according to the above process2～y4：y2＝3.83，y3＝4.59，y4＝2.27。
Selecting a work area series weight coefficient according to an application scene: a is 0.9; b is 1.8; c is 2.3; d is 1.1.
Calculating an odor concentration value:
Y＝ay1+by2+cy3+dy4namely:
Y＝0.9*2.34+1.8*3.83+2.3*4.59+1.1*2.27
＝2.106+6.894+10.557+2.497
＝22.054≈22.1。
according to the invention, calibration curves are respectively preset in different sensor signal value ranges of each sensor, so that the response characteristics of the sensors can be fitted better, the sensor signal fitting value of the gas substance corresponding to the sensor is calculated more accurately, and the odor concentration value is monitored by replacing manpower through electronic equipment, so that the long-term continuous online monitoring can be realized. Through actual detection, compared with an artificial olfactory discrimination numerical value, the deviation of the result is less than 5%, and the method can be well used for monitoring the concentration of the odor in the ambient air.
The invention also provides a device for calculating the odor concentration value by fitting the sensor signal value, which comprises the following components:
the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring a plurality of sensor resistance values of gas to be detected and preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and the plurality of sensor resistance values are obtained by measuring a plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
the data processing module is used for selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance corresponding to the sensor according to each sensor signal value, calculating the sensor signal fitting value of the gas substance corresponding to each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance corresponding to the sensor have different sensor signal value ranges;
the weight configuration module is used for acquiring respective weights of concentration values of gas substances respectively corresponding to the plurality of sensors according to a gas acquisition scene to be detected;
and the calculation module is used for weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
In another embodiment, the method for preprocessing the resistance value of each sensor by the data acquisition module comprises the following steps: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0The resistance value of the sensor under the odorless gas environment is acquired in advance.
In another embodiment, the weight of each of the sensor signal fitting values of the plurality of sensors respectively corresponding to the responding gas substances in the weight configuration module is preset.
In another embodiment, the weight configuration module is configured to weight the sensor signal fit values of the plurality of sensors respectively corresponding to the responded gas substances by a user.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (10)
1. A method for calculating odor concentration values by sensor signal value fitting, comprising:
the method comprises the steps of obtaining a plurality of sensor resistance values of gas to be detected, preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and measuring the plurality of sensor resistance values by a plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor according to each sensor signal value, and calculating the sensor signal fitting value of the gas substance correspondingly responded by each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance correspondingly responded by the sensor have different sensor signal value ranges respectively;
according to a gas acquisition scene to be detected, acquiring respective weights of sensor signal fitting values of gas substances respectively corresponding to a plurality of sensors;
and weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
2. A method of calculating an odor concentration value by sensor signal value fitting as claimed in claim 1 wherein the method of pre-conditioning the resistance value of each sensor comprises: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0For pre-acquired sensor in odorless gas environmentA sensor resistance value.
3. The method of calculating an odor concentration value by sensor signal value fitting of claim 1 wherein the respective weights of the sensor signal fitting values of the plurality of sensors for the respective responsive gas species are preset.
4. The method of calculating an odor concentration value by sensor signal value fitting of claim 1 wherein the plurality of sensors each correspond to a respective weight of the sensor signal fit values of the responsive gas species as input by the user.
5. Device of foul smell concentration value is calculated through sensor signal value fitting, its characterized in that includes:
the system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring a plurality of sensor resistance values of gas to be detected and preprocessing each sensor resistance value to obtain a plurality of sensor signal values, and the plurality of sensor resistance values are obtained by measuring a plurality of sensors respectively responding to different types of gas substances in the gas to be detected;
the data processing module is used for selecting one of a plurality of preset sensor signal values and a sensor signal fitting value calibration curve of the gas substance corresponding to the sensor according to each sensor signal value, calculating the sensor signal fitting value of the gas substance corresponding to each sensor, wherein the plurality of sensor signal values and the sensor signal fitting value calibration curve of the gas substance corresponding to the sensor have different sensor signal value ranges;
the weight configuration module is used for acquiring respective weights of sensor signal fitting values of gas substances which respectively correspond to the plurality of sensors according to a scene of acquiring the gas to be detected;
and the calculation module is used for weighting and summing the sensor signal fitting values of the gas substances corresponding to the responses of the plurality of sensors respectively.
6. Passing sensor signal value simulation of claim 5The device for calculating the concentration value of the odor is characterized in that the method for preprocessing the resistance value of each sensor by the data acquisition module comprises the following steps: obtaining the sensor resistance value R of the sensor under the gas environment to be measureds(ii) a Calculating the resistance value R of the sensorsAnd a sensor resistance value R0Ratio R of1Wherein R is0The resistance value of the sensor under the odorless gas environment is acquired in advance.
7. The apparatus for calculating an odor concentration value by sensor signal value fitting according to claim 5, wherein the weights of the sensor signal fitting values of the plurality of sensors corresponding to the respective responsive gas substances in the weight configuration module are preset.
8. The apparatus for calculating an odor concentration value by sensor signal value fitting of claim 5 wherein the plurality of sensors in the weight configuration module are each responsive to a respective weight of the sensor signal fit values of the responsive gas species as input by a user.
9. An electronic device, comprising: at least one processor, and a memory communicatively coupled to the at least one processor, wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method of any of claims 1-4.
10. Storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the method of any one of claims 1 to 4.
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