CN113933258A - VOCs pollutant tracing method, terminal and system based on navigation monitoring - Google Patents
VOCs pollutant tracing method, terminal and system based on navigation monitoring Download PDFInfo
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- 238000009792 diffusion process Methods 0.000 claims description 12
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- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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Abstract
The invention relates to a VOCs pollutant tracing method, a terminal and a system based on navigation monitoring, wherein the method comprises the following steps: s1, carrying out navigation monitoring according to a preset navigation route in the area to be monitored, and acquiring coordinates of navigation position points and infrared spectrum and meteorological information of corresponding environment atmosphere; s2, matching the infrared spectrum with a pollutant standard information base to obtain the type and concentration of the target pollutant; the pollutant standard information base stores the corresponding relation of the type, infrared spectrum and concentration of pollutants in the area to be monitored; s3, judging whether the concentration of the target pollutant exceeds a preset concentration threshold value; if yes, judging that the target pollutant is an overproof pollutant; s4, determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information; and S5, determining suspected polluted enterprises according to the distribution information of the polluted enterprises in the source area of the overproof pollutants and the area to be monitored. The invention has high tracing precision.
Description
Technical Field
The invention belongs to the technical field of pollution emission monitoring, and particularly relates to a VOCs pollutant tracing method, terminal and system based on navigation monitoring.
Background
Volatile Organic Compounds (VOCs) are wide in source and complex in composition, and have potential threats to human health. The discharge process of VOCs pollutants is transient and difficult to control and monitor.
Accurate measurement and accurate traceability of VOCs pollutants are the premise for developing VOCs emission reduction work. Compared with traditional offline monitoring and online monitoring, the sailing monitoring technology has the characteristics of large monitoring range, quick response, strong maneuverability and the like. In recent years, the voyage monitoring technology for VOCs pollutants is widely concerned, the concentration and composition monitoring of the VOCs pollutants in the ambient atmosphere is synchronously carried out in the vehicle running process, the space-time efficiency of pollution investigation is greatly improved, and the VOCs pollution monitoring technology is widely applied to monitoring of the VOCs ambient environment in an industrial park at present.
At present, VOCs pollutant navigation monitoring equipment mostly adopts a navigation technology based on a proton transfer reaction time-of-flight mass spectrometer, for example, an atmospheric volatile organic compound tracing method based on navigation monitoring disclosed by the publication number CN113655111A, a VOCs navigation monitoring device disclosed by the publication number CN214539409U, and the like. However, mass spectrometers are in principle unable to distinguish between contaminants of the same relative molecular mass and are relatively costly. In addition, the existing tracing method respectively compares the VOCs map with each formal map existing in the fingerprint database aiming at the current or historical navigation monitoring result, and respectively calculates the similarity of the maps; however, the meteorological data at different moments are different, and accurate tracing is difficult only by comparison of spectrograms.
Disclosure of Invention
Based on the above-mentioned shortcomings and drawbacks of the prior art, an object of the present invention is to solve at least one or more of the above-mentioned problems of the prior art, in other words, to provide a method, terminal and system for tracing VOCs pollutants based on monitoring during voyage, which satisfy one or more of the above-mentioned needs.
In order to achieve the purpose, the invention adopts the following technical scheme:
a tracing method for VOCs pollutants based on navigation monitoring comprises the following steps:
s1, carrying out navigation monitoring according to a preset navigation route in the area to be monitored, and acquiring the coordinates of a navigation position point and infrared spectrum and meteorological information of environment atmosphere corresponding to the coordinates in real time;
s2, matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of the target pollutant; the pollutant standard information base stores the corresponding relation among the type, infrared spectrum and concentration of pollutants in the area to be monitored;
s3, judging whether the concentration of the target pollutant exceeds a preset concentration threshold value; if yes, judging that the target pollutant is an overproof pollutant;
s4, determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information;
and S5, determining suspected polluted enterprises according to the distribution information of the polluted enterprises in the source area of the overproof pollutants and the area to be monitored.
Preferably, in step S1, the meteorological information includes wind direction and wind speed.
Preferably, in step S4, the first position point P is calculated according to the concentration corresponding to the out-of-standard pollutant, the coordinates of the navigation position point, and the weather information1And a second position point P2The coordinates of (a):
P1(x 1，y 1)=(x+k w *C*cos(θ’-Ω w )，y+ k w *C*sin(θ’-Ω w ))
P2(x 2，y 2)=(x+k w *C*cos(θ’+Ω w )，y+ k w *C*sin(θ’+Ω w ))
k w =logw+15
Ω w =π*log(1.5/(w+1)+1.2)
wherein the coordinate of the navigation position point P is P: (x，y) The concentration of the overproof pollutants isC(ii) a The wind direction isθIn the opposite direction ofθ'; when in useθWhen the temperature is more than or equal to 180 ℃,θ’=θ-180 °; when in useθWhen the temperature is less than 180 degrees,θ’=θ+180 °; wind speed ofwCoefficient of diffusion distance ofk w A coefficient of direction ofΩ w ；
A navigation position point P and a first position point P1And a second position point P2The enclosed area is the source area of the overproof pollutants.
Preferably, the step S5 is followed by the following steps:
and S6, after the navigation monitoring is completed, obtaining a list of key suspected polluted enterprises through a correlation matching algorithm according to the suspected polluted enterprises determined by each navigation position point.
Preferably, the step S6 specifically includes the following steps:
s61, position coordinates A (based on suspected pollution enterprises)x 0，y 0) Judging and monitoring the coordinate P of the navigation position point of the overproof pollutantj(x j ，y j ) Judging whether the condition is within the suspected pollution range of the suspected polluted enterprise, wherein the condition comprises a first condition and a second condition; if the conditions I and II are met simultaneously, the corresponding suspected polluted enterprises are marked as key suspected polluted enterprises if the judgment result is yes;
the first condition is as follows: | APj|＜R/k wj ；
Wherein, | APjI is the position A of the suspected polluted enterprise and the navigation position point P for monitoring the overproof pollutantsjThe distance between the two or more of the two or more,Rmean diffusion distance:
C j is as followsjThe concentration of the overproof pollutant corresponding to the navigation position point of the overproof pollutant is monitored,k wj is as followsjThe diffusion distance coefficient of the navigation position point of the overproof pollutant is monitored,jthe value is 1 toMThe number of (1) is (a),Mthe number of the navigation position points of the overproof pollutants is monitored;
the second condition is as follows:θ j ’-Ω wj ＜arctan[(y 0-y j )/(x 0-x j )]＜θ j ’+Ω wj ；
wherein the content of the first and second substances,θ j ' is as followsjThe direction opposite to the wind direction at the navigation position point of the overproof pollutant is monitored,Ω wj is as followsjThe direction coefficient of the navigation position point where the overproof pollutant is monitored;
and S62, summarizing the key suspected polluted enterprises obtained after the step S61 is executed on all the suspected polluted enterprises to obtain a list of the key suspected polluted enterprises.
Preferably, after the step S6, the method further includes the following steps:
and S7, based on the list of the key suspected polluted enterprises, performing data correlation analysis on each key suspected polluted enterprise according to the times of monitoring the overproof pollutants and the average overproof concentration, and generating a tracing result.
Preferably, after the step S7, the method further includes the following steps:
and S8, sending the tracing result to the supervisor end.
The invention also provides a VOCs pollutant tracing terminal based on navigation monitoring, and the VOCs pollutant tracing method is applied, and the VOCs pollutant tracing terminal comprises:
the device comprises a setting module, a monitoring module and a monitoring module, wherein the setting module is used for setting a preset concentration threshold value of the pollutant exceeding the standard and the distribution information of the polluted enterprises in the area to be monitored;
the acquisition module is used for acquiring the coordinates of the navigation position points and the infrared spectrum and the meteorological information of the environment atmosphere corresponding to the coordinates in real time;
the pollutant standard information base is used for storing the corresponding relation among the type, the infrared spectrum and the concentration of pollutants in the area to be monitored;
the matching module is used for matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of a target pollutant;
the judgment module is used for judging whether the concentration of the target pollutant exceeds a preset concentration threshold value;
and the data processing module is used for determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information, and is also used for determining suspected polluted enterprises according to the source area of the overproof pollutants and the distribution information of the polluted enterprises in the area to be monitored.
The invention also provides a VOCs pollutant tracing system based on navigation monitoring, which comprises:
the navigation vehicle is used for navigating according to a preset navigation route in an area to be monitored;
the Fourier infrared spectrometer is carried on the navigation vehicle and used for detecting the infrared spectrum of the ambient atmosphere;
the weather detector is carried on the navigation vehicle and used for detecting weather information of ambient atmosphere;
the system also comprises a VOCs pollutant tracing terminal according to the scheme.
Preferably, the fourier infrared spectrometer includes an infrared source, an interferometer, a plane mirror, an open white cell, a parabolic mirror, and a detector, wherein infrared beams radiated by the infrared source enter a gas chamber of the open white cell through the plane mirror after being modulated by the interferometer, the infrared beams are reflected in the open white cell several times, and after reaching a target optical path, the beams are emitted from the open white cell to the parabolic mirror, and are converged to the detector after being reflected by the parabolic mirror, and the detector detects infrared signals.
Compared with the prior art, the invention has the beneficial effects that:
according to the VOCs pollutant tracing method based on the sailing monitoring, the infrared spectrum of the ambient atmosphere is collected through the sailing monitoring, and pollutants with the same relative molecular mass can be distinguished by using the infrared spectrum; then, the source area of the overproof pollutants is comprehensively analyzed and determined according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information, so that the precision of defining the source area of the overproof pollutants is improved; and finally, comprehensive judgment is carried out according to the source area of the overproof pollutants and the distribution information of the polluted enterprises in the area to be monitored, and finally the suspected polluted enterprises are determined, so that the tracing precision is high.
The VOCs pollutant tracing terminal based on the navigation monitoring can distinguish pollutants with the same relative molecular mass, has high tracing precision and can realize intelligent tracing.
The VOCs pollutant tracing system based on the navigation monitoring can distinguish pollutants with the same relative molecular mass, has high tracing precision and can realize intelligent tracing.
Drawings
Fig. 1 is a flowchart of a VOCs pollutant tracing method based on navigational monitoring in embodiment 1 of the present invention;
fig. 2 is a block architecture diagram of a VOCs pollutant tracing terminal based on navigational monitoring in embodiment 1 of the present invention;
FIG. 3 is a block diagram of a system for tracing VOCs pollutants based on navigational monitoring according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a fourier infrared spectrometer of embodiment 1 of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Example 1:
as shown in fig. 1, the VOCs pollutant tracing method based on the navigational monitoring of the embodiment includes the following steps:
s0, setting initial parameters and establishing a pollutant standard information base;
specifically, the setting of the initial parameters includes selecting a range of an area to be monitored and planning a corresponding navigation route to obtain a preset navigation route.
Establishing a pollutant standard information base, comprising: collecting the raw data information in the area to be monitored, including but not limited to the following raw data information: the method comprises the steps of establishing a standard pollutant information base by establishing a corresponding relation among the type of pollutants in a region to be monitored, the concentration of the pollutants and the infrared spectrum of the pollutants corresponding to the pollutants.
S1, carrying out navigation monitoring according to a preset navigation route in the area to be monitored, and acquiring the coordinates of a navigation position point and infrared spectrum and meteorological information of environment atmosphere corresponding to the coordinates in real time;
specifically, the navigation position points, i.e. the detection position points, of the embodiment are sequentially distributed along the traveling direction of the preset navigation route, and the number of the navigation position points can be determined according to actual needs without limitation of specific numbers.
S2, matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of the target pollutant;
the source tracing method has the advantages that the types of the target pollutants are distinguished, accurate source tracing is carried out on different target pollutants, and the accuracy of a final source tracing result can be guaranteed.
S3, judging whether the concentration of the target pollutant exceeds a preset concentration threshold value; if yes, judging that the target pollutant is an overproof pollutant;
specifically, different types of target pollutants are respectively judged and processed, the preset concentration threshold is also set in a targeted manner based on different types of target pollutants according to national standards or corresponding industrial standards, and the judgment of whether the pollutants exceed the standard or not is targeted and real-time, so that the judgment can be made according to local conditions.
S4, determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information;
specifically, after the overproof pollutant is judged, the source area of the overproof pollutant is determined through comprehensive analysis according to the coordinate of the detected navigation position point of the overproof pollutant and meteorological information and in combination with the concentration of the overproof pollutant. Wherein, the meteorological information comprises wind direction and wind speed.
The specific determination process of the source area of the overproof pollutant in this embodiment is as follows:
calculating to obtain a first position point P according to the concentration corresponding to the overproof pollutant, the coordinates of the navigation position point and meteorological information1And a second position point P2The coordinates of (a):
P1(x 1，y 1)=(x+k w *C*cos(θ’-Ω w )，y+ k w *C*sin(θ’-Ω w ))
P2(x 2，y 2)=(x+k w *C*cos(θ’+Ω w )，y+ k w *C*sin(θ’+Ω w ))
k w =logw+15
Ω w =π*log(1.5/(w+1)+1.2)
wherein the coordinate of the navigation position point P is P: (x，y) The concentration of the overproof pollutants detected at the navigation position point P isC(ii) a The wind direction detected at the navigation position point P isθIn the opposite direction ofθ'; when in useθWhen the temperature is more than or equal to 180 ℃,θ’=θ-180 °; when in useθWhen the temperature is less than 180 degrees,θ’=θ+180 °; the wind speed detected by the sailing position point P iswThe diffusion distance coefficient at the cruising position point P isk w The direction coefficient at the cruising position point P isΩ w ；
A navigation position point P and a first position point P1And a second position point P2And the area enclosed by the connecting lines is the source area of the overproof pollutants.
According to the embodiment, the concentration of the overproof pollutants, the coordinates of the navigation position points and the meteorological information are comprehensively analyzed, the source area of the overproof pollutants is determined, the precision of the definition of the source area of the overproof pollutants is improved, and the precision of tracing is further improved.
And S5, determining suspected polluted enterprises according to the distribution information of the polluted enterprises in the source area of the overproof pollutants and the area to be monitored.
Specifically, the polluted enterprises in the area to be monitored can be divided into two parts, wherein one part is located in the source area of the overproof pollutants, and the part of the polluted enterprises is determined as suspected polluted enterprises; the other part is located outside the source area of the overproof pollutants, namely is not suspected to pollute the enterprise.
In order to further accurately locate the real pollution enterprise, after step S5, the following steps are also performed:
and S6, after the navigation monitoring is completed, obtaining a list of key suspected polluted enterprises through a correlation matching algorithm according to the suspected polluted enterprises determined by each navigation position point.
The completion of the navigation monitoring refers to the completion of the whole process of the navigation from the starting point of the preset navigation route to the end point of the preset navigation route. The whole process involves a plurality of navigation position points, suspected contaminated enterprises determined by each navigation position point are further screened, and a key suspected contaminated enterprise list is obtained.
Specifically, the step S6 specifically includes the following steps:
s61, position coordinates A (based on suspected pollution enterprises)x 0，y 0) Judging and monitoring the coordinate P of the navigation position point of the overproof pollutantj(x j ，y j ) Judging whether the condition is within the suspected pollution range of the suspected polluted enterprise, wherein the condition comprises a first condition and a second condition; if the first condition and the second condition are simultaneously met, judging the knotIf so, marking the corresponding suspected polluted enterprises as key suspected polluted enterprises;
the first condition is as follows: | APj|＜R/k wj ；
Wherein, | APjI is the position A of the suspected polluted enterprise and the navigation position point P for monitoring the overproof pollutantsjThe distance between the two or more of the two or more,Rmean diffusion distance:
C j is as followsjThe concentration of the overproof pollutant corresponding to the navigation position point of the overproof pollutant is monitored,k wj is as followsjThe diffusion distance coefficient of the navigation position point where the overproof pollutant is monitored;jthe value is 1 toMThe number of (1) is (a),Mthe number of the navigation position points of the overproof pollutants is monitored;
the second condition is as follows:θ j ’-Ω wj ＜arctan[(y 0-y j )/(x 0-x j )]＜θ j ’+Ω wj ；
wherein the content of the first and second substances,θ j ' is as followsjThe direction opposite to the wind direction at the navigation position point of the overproof pollutant is monitored,Ω wj is as followsjThe direction coefficient of the navigation position point where the overproof pollutant is monitored;
s62, summarizing the key suspected polluted enterprises obtained after all suspected polluted enterprises are subjected to the step S61 to obtain a key suspected polluted enterprise list;
in the process of judging the key suspected polluted enterprises, the distance and the wind direction angle are adopted for comprehensive judgment, and the judgment precision of the key suspected polluted enterprises is further improved.
In addition, in the present embodiment, data correlation analysis is performed on the important suspected contaminated enterprise, specifically, after the step S6, the following steps are further performed:
and S7, based on the list of the key suspected polluted enterprises, performing data correlation analysis on each key suspected polluted enterprise according to the times of monitoring the overproof pollutants and the average overproof concentration, and generating a tracing result. For example, in the list of the key suspected contaminated enterprises, each key suspected contaminated enterprise is ranked in a grading manner according to the number of times of monitoring the overproof contaminants and the average overproof concentration, and a tracing result is obtained.
After obtaining the tracing result, the following steps are also carried out:
and S8, sending the tracing result to the supervisor end. For example, after receiving the tracing result, the supervising end provides decision making judgment for law enforcement departments.
Based on the method for tracing the source of the VOCs pollutants in the present embodiment, as shown in fig. 2, the present embodiment further provides a terminal for tracing the source of the VOCs pollutants based on the monitoring of sailing, which includes a setting module, an acquisition module, a pollutant standard information base, a matching module, a determination module, a data processing module and a communication module.
The setting module is used for setting a preset concentration threshold value at which pollutants exceed standards and distribution information of polluted enterprises in an area to be monitored.
The acquisition module is used for acquiring the coordinates of the navigation position points and the infrared spectrum and the meteorological information of the environment atmosphere corresponding to the coordinates in real time; specifically, the navigation position points, i.e. the detection position points, of the embodiment are sequentially distributed along the traveling direction of the preset navigation route, and the number of the navigation position points can be determined according to actual needs without limitation of specific numbers.
And the pollutant standard information base is used for storing the corresponding relation among the types, infrared spectrums and concentrations of pollutants in the area to be monitored.
The matching module is used for matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of a target pollutant; the source tracing method has the advantages that the types of the target pollutants are distinguished, accurate source tracing is carried out on different target pollutants, and the accuracy of a final source tracing result can be guaranteed.
The judgment module is used for judging whether the concentration of the target pollutant exceeds a preset concentration threshold value;
and the data processing module is used for determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information, and is also used for determining suspected polluted enterprises according to the source area of the overproof pollutants and the distribution information of the polluted enterprises in the area to be monitored.
Specifically, the data processing module comprehensively analyzes and determines the source area of the overproof pollutant according to the coordinate of the detected navigation position point of the overproof pollutant and meteorological information and by combining the concentration of the overproof pollutant. Wherein, the meteorological information comprises wind direction and wind speed.
The specific determination process of the source area of the overproof pollutant in this embodiment is as follows:
calculating to obtain a first position point P according to the concentration corresponding to the overproof pollutant, the coordinates of the navigation position point and meteorological information1And a second position point P2The coordinates of (a):
P1(x 1，y 1)=(x+k w *C*cos(θ’-Ω w )，y+ k w *C*sin(θ’-Ω w ))
P2(x 2，y 2)=(x+k w *C*cos(θ’+Ω w )，y+ k w *C*sin(θ’+Ω w ))
k w =logw+15
Ω w =π*log(1.5/(w+1)+1.2)
wherein the coordinate of the navigation position point P is P: (x，y) The concentration of the overproof pollutants detected at the navigation position point P isC(ii) a The wind direction detected at the navigation position point P isθIn the opposite direction ofθ'; when in useθWhen the temperature is more than or equal to 180 ℃,θ’=θ-180 °; when in useθWhen the temperature is less than 180 degrees,θ’=θ+180 °; by detection of a point P of flightWind speed ofwThe diffusion distance coefficient at the cruising position point P isk w The direction coefficient at the cruising position point P isΩ w ；
A navigation position point P and a first position point P1And a second position point P2And the area enclosed by the connecting lines is the source area of the overproof pollutants.
According to the embodiment, the concentration of the overproof pollutants, the coordinates of the navigation position points and the meteorological information are comprehensively analyzed, the source area of the overproof pollutants is determined, the precision of the definition of the source area of the overproof pollutants is improved, and the precision of tracing is further improved.
The data processing module of this embodiment is further configured to obtain a list of key suspected contaminated enterprises through a correlation matching algorithm according to the suspected contaminated enterprises determined at each navigational position after the navigational monitoring is completed. The completion of the navigation monitoring refers to the completion of the whole process of the navigation from the starting point of the preset navigation route to the end point of the preset navigation route. The whole process involves a plurality of navigation position points, suspected contaminated enterprises determined by each navigation position point are further screened, and a key suspected contaminated enterprise list is obtained.
Specifically, the data processing module obtains a list of key suspected contaminated enterprises through a correlation matching algorithm according to the suspected contaminated enterprises determined by each navigation position point, and the method comprises the following steps:
position coordinates A based on suspected contaminated enterprises (x 0，y 0) Judging and monitoring the coordinate P of the navigation position point of the overproof pollutantj(x j ，y j ) Judging whether the condition is within the suspected pollution range of the suspected polluted enterprise, wherein the condition comprises a first condition and a second condition; if the conditions I and II are met simultaneously, the corresponding suspected polluted enterprises are marked as key suspected polluted enterprises if the judgment result is yes;
the first condition is as follows: | APj|＜R/k wj ；
Wherein, | APjI is the position A of the suspected polluted enterprise and the navigation position point P for monitoring the overproof pollutantsjThe distance between the two or more of the two or more,Rmean diffusion distance:
C j is as followsjThe concentration of the overproof pollutant corresponding to the navigation position point of the overproof pollutant is monitored,k wj is as followsjThe diffusion distance coefficient of the navigation position point where the overproof pollutant is monitored;jthe value is 1 toMThe number of (1) is (a),Mthe number of the navigation position points of the overproof pollutants is monitored;
the second condition is as follows:θ j ’-Ω wj ＜arctan[(y 0-y j )/(x 0-x j )]＜θ j ’+Ω wj ；
wherein the content of the first and second substances,θ j ' is as followsjThe direction opposite to the wind direction at the navigation position point of the overproof pollutant is monitored,Ω wj is as followsjThe direction coefficient of the navigation position point where the overproof pollutant is monitored;
when all suspected contaminated enterprises execute the process treatment, the obtained key suspected contaminated enterprises are summarized to obtain a key suspected contaminated enterprise list;
in the process of judging the key suspected polluted enterprises, comprehensive judgment is carried out by adopting two dimensions of distance and wind direction angle, and the judgment precision of the key suspected polluted enterprises is further improved.
The data processing module of this embodiment is further configured to perform data correlation analysis on each of the key suspected-polluted enterprises according to the number of times that the overproof pollutants are monitored and the average overproof concentration, based on the list of the key suspected-polluted enterprises, and generate a traceability result. For example, in the list of the key suspected contaminated enterprises, each key suspected contaminated enterprise is ranked in a grading manner according to the number of times of monitoring the overproof contaminants and the average overproof concentration, and a tracing result is obtained.
The communication module of this embodiment is used for sending the traceability result to the supervisor end for law enforcement departments to make decision.
As shown in fig. 3, the present embodiment further provides a VOCs pollutant tracing system based on navigational monitoring, which includes:
the navigation vehicle is used for navigating according to a preset navigation route in an area to be monitored; the navigation vehicle is provided with a GPS module and is used for positioning the coordinates of a navigation position point and realizing data space inversion;
the Fourier infrared spectrometer is carried on the navigation vehicle and used for detecting the infrared spectrum of the ambient atmosphere;
the weather detector is carried on the navigation vehicle and used for detecting weather information of ambient atmosphere; specifically, the meteorological detector is a wind speed and direction measuring instrument, and accordingly, meteorological information comprises a wind direction and a wind speed;
the VOCs pollutant tracing terminal of the embodiment is further included.
Specifically, as shown in fig. 4, the fourier infrared spectrometer includes an infrared light source 1, an interferometer 2, a plane mirror 3, an open white cell 4, a parabolic mirror 5, and a detector 6, an infrared light source radiation infrared beam enters a gas chamber of the open white cell through the plane mirror after being modulated by the interferometer, the infrared light beam is reflected in the open white cell several times, the light beam exits from the open white cell to the parabolic mirror after reaching a target optical path, and is converged to the detector after being reflected by the parabolic mirror, and the detector detects an infrared signal.
Because the concentration of pollutants in the ambient atmosphere is not high, the detection limit of the existing Fourier infrared spectrometer is limited, and accurate measurement cannot be carried out. Therefore, the fourier infrared spectrometer of this embodiment is designed with an open white cell, and infrared light is reflected tens of times in the white cell, reaching an optical path of tens of meters or more, and realizing high-precision measurement.
Wherein, the detector adopts a Stirling refrigeration type MCT detector.
In addition, the Fourier infrared spectrometer is also provided with a calibration gas chamber 7, and calibration gas is introduced into the calibration gas chamber 7 and used for calibrating the relation between the spectrum and the gas concentration.
Before measurement of the Fourier infrared spectrometer, a zero gas generator is used for introducing large-flow zero gas into the open white cell for purging, and a zero spectrum is recorded; then, standard gas with equivalent concentration as the concentration of a measuring range point is introduced into the calibration gas chamber, and meanwhile, a zero gas generator is used for introducing large-flow zero gas into the open white cell for blowing and sweeping, and the concentration spectrum of the measuring range point is recorded; wherein, the equivalent concentration of the range point concentration gas is calculated according to the following formula:
Ce=Ct*Lc/L
wherein, CeIs the standard gas equivalent concentration, in ppb; ctIs a standard gas concentration nominal value, in ppm; l is the optical distance of the open white cell, unit m; l iscTo calibrate the gas cell length, in mm.
The VOCs pollutant tracing system of the embodiment processes and calculates an infrared spectrum according to an infrared signal received by a detector, and then inverses the concentration of VOCs pollutants by combining a model algorithm according to the infrared spectrum measured in real time and a stored zero point spectrum and a range spectrum, and matches pollutant concentration information with GPS position information; and then forming a VOCs pollutant type and concentration distribution diagram according to the driving route of the navigation vehicle, matching the characteristic factors of the pollutants with the pre-stored pollution source characteristic factors of the area to be monitored, and realizing the tracing of the pollutants by combining with the wind speed and wind direction information.
Example 2:
the difference between the VOCs pollutant tracing method based on the navigation monitoring in this embodiment and embodiment 1 is that:
all steps after the step S5 are omitted, so that the tracing process is simplified, but the tracing accuracy is reduced, and the requirements of different applications are met, and the other steps can refer to the embodiment 1;
the VOCs pollutant tracing terminal based on the navigation monitoring of the embodiment correspondingly simplifies the processing function of the data processing module, reduces the cost although the tracing precision is reduced, and meets the requirements of different applications, and other architectures can refer to embodiment 1;
the VOCs pollutant traceability system based on the sailing monitoring of this embodiment adopts the VOCs pollutant traceability terminal of this embodiment, satisfies the demand of different applications, and embodiment 1 can be referred to other frameworks.
Example 3:
the difference between the VOCs pollutant tracing method based on the navigation monitoring in this embodiment and embodiment 1 is that:
all steps after the step S6 are omitted, so that the tracing process is simplified, but the tracing accuracy is reduced, and the requirements of different applications are met, and the other steps can refer to the embodiment 1;
the VOCs pollutant tracing terminal based on the navigation monitoring of the embodiment correspondingly simplifies the processing function of the data processing module, reduces the cost although the tracing precision is reduced, and meets the requirements of different applications, and other architectures can refer to embodiment 1;
the VOCs pollutant traceability system based on the sailing monitoring of this embodiment adopts the VOCs pollutant traceability terminal of this embodiment, satisfies the demand of different applications, and embodiment 1 can be referred to other frameworks.
Example 4:
the difference between the VOCs pollutant tracing method based on the navigation monitoring in this embodiment and embodiment 1 is that:
all steps after the step S7 are omitted, so that the tracing process is simplified, and the requirements of different applications are met; other procedures can be referred to example 1;
the VOCs pollutant tracing terminal based on the navigation monitoring does not need to design a communication module, and although the tracing result cannot be remotely transmitted, the cost is reduced, and the requirements of different applications are met; other architectures can refer to example 1;
the VOCs pollutant traceability system based on the sailing monitoring of this embodiment adopts the VOCs pollutant traceability terminal of this embodiment, satisfies the demand of different applications, and embodiment 1 can be referred to other frameworks.
Example 5:
the difference between the VOCs pollutant traceability system based on the navigation monitoring of the embodiment and the embodiment 1 is that:
the meteorological detector is integrated on the VOCs pollutant traceability terminal, or the meteorological detector and the VOCs pollutant traceability terminal are integrated on the Fourier infrared spectrometer; the portable type air conditioner is convenient to carry on a navigation vehicle, meets requirements of different applications, and can refer to embodiment 1 for other frameworks.
The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.
Claims (10)
1. A VOCs pollutant tracing method based on navigation monitoring is characterized by comprising the following steps:
s1, carrying out navigation monitoring according to a preset navigation route in the area to be monitored, and acquiring the coordinates of a navigation position point and infrared spectrum and meteorological information of environment atmosphere corresponding to the coordinates in real time;
s2, matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of the target pollutant; the pollutant standard information base stores the corresponding relation among the type, infrared spectrum and concentration of pollutants in the area to be monitored;
s3, judging whether the concentration of the target pollutant exceeds a preset concentration threshold value; if yes, judging that the target pollutant is an overproof pollutant;
s4, determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information;
and S5, determining suspected polluted enterprises according to the distribution information of the polluted enterprises in the source area of the overproof pollutants and the area to be monitored.
2. The VOCs pollutant tracing method based on sailing monitoring of claim 1, wherein in step S1, the meteorological information includes wind direction and wind speed.
3. The VOCs pollutant tracing method based on voyage monitoring of claim 2, wherein in step S4, the steps are carried out according to the corresponding concentration of the out-of-standard pollutantCalculating the coordinates of the navigation position point and meteorological information to obtain a first position point P1And a second position point P2The coordinates of (a):
P1(x 1，y 1)=(x+k w *C*cos(θ’-Ω w )，y+ k w *C*sin(θ’-Ω w ))
P2(x 2，y 2)=(x+k w *C*cos(θ’+Ω w )，y+ k w *C*sin(θ’+Ω w ))
k w =logw+15
Ω w =π*log(1.5/(w+1)+1.2)
wherein the coordinate of the navigation position point P is P: (x，y) The concentration of the overproof pollutants isC(ii) a The wind direction isθIn the opposite direction ofθ'; when in useθWhen the temperature is more than or equal to 180 ℃,θ’=θ-180 °; when in useθWhen the temperature is less than 180 degrees,θ’=θ+180 °; wind speed ofwCoefficient of diffusion distance ofk w A coefficient of direction ofΩ w ；
A navigation position point P and a first position point P1And a second position point P2The enclosed area is the source area of the overproof pollutants.
4. The VOCs pollutant tracing method based on walkthrough monitoring of claim 3, further comprising the following steps after the step S5:
and S6, after the navigation monitoring is completed, obtaining a list of key suspected polluted enterprises through a correlation matching algorithm according to the suspected polluted enterprises determined by each navigation position point.
5. The VOCs pollutant tracing method based on navigational monitoring according to claim 4, wherein the step S6 specifically comprises the following steps:
s61, position coordinates A (based on suspected pollution enterprises)x 0，y 0) Judging and monitoring the coordinate P of the navigation position point of the overproof pollutantj(x j ，y j ) Judging whether the condition is within the suspected pollution range of the suspected polluted enterprise, wherein the condition comprises a first condition and a second condition; if the conditions I and II are met simultaneously, the corresponding suspected polluted enterprises are marked as key suspected polluted enterprises if the judgment result is yes;
the first condition is as follows: | APj|＜R/k wj ；
Wherein, | APjI is the position A of the suspected polluted enterprise and the navigation position point P for monitoring the overproof pollutantsjThe distance between the two or more of the two or more,Rmean diffusion distance:
wherein the content of the first and second substances,C j is as followsjThe concentration of the overproof pollutant corresponding to the navigation position point of the overproof pollutant is monitored,k wj is as followsjThe diffusion distance coefficient of the navigation position point where the overproof pollutant is monitored;jthe value is 1 toMThe number of (1) is (a),Mthe number of the navigation position points of the overproof pollutants is monitored;
the second condition is as follows:θ j ’-Ω wj ＜arctan[(y 0-y j )/(x 0-x j )]＜θ j ’+Ω wj ；
wherein the content of the first and second substances,θ j ' is as followsjThe direction opposite to the wind direction at the navigation position point of the overproof pollutant is monitored,Ω wj is as followsjDirection coefficient of navigation position point where overproof pollutant is monitored；
And S62, summarizing the key suspected polluted enterprises obtained after the step S61 is executed on all the suspected polluted enterprises to obtain a list of the key suspected polluted enterprises.
6. The VOCs pollutant tracing method based on walkthrough monitoring of claim 4 or 5, wherein after the step S6, the method further comprises the following steps:
and S7, based on the list of the key suspected polluted enterprises, performing data correlation analysis on each key suspected polluted enterprise according to the times of monitoring the overproof pollutants and the average overproof concentration, and generating a tracing result.
7. The VOCs pollutant tracing method based on walkthrough monitoring of claim 6, further comprising the following steps after the step S7:
and S8, sending the tracing result to the supervisor end.
8. The VOCs pollutant tracing terminal based on navigation monitoring is applied to the VOCs pollutant tracing method according to claim 1, and the VOCs pollutant tracing terminal comprises:
the device comprises a setting module, a monitoring module and a monitoring module, wherein the setting module is used for setting a preset concentration threshold value of the pollutant exceeding the standard and the distribution information of the polluted enterprises in the area to be monitored;
the acquisition module is used for acquiring the coordinates of the navigation position points and the infrared spectrum and the meteorological information of the environment atmosphere corresponding to the coordinates in real time;
the pollutant standard information base is used for storing the corresponding relation among the type, the infrared spectrum and the concentration of pollutants in the area to be monitored;
the matching module is used for matching the acquired infrared spectrum with a pollutant standard information base to obtain the type and concentration of a target pollutant;
the judgment module is used for judging whether the concentration of the target pollutant exceeds a preset concentration threshold value;
and the data processing module is used for determining a source area of the overproof pollutants according to the concentration corresponding to the overproof pollutants, the coordinates of the navigation position points and the meteorological information, and is also used for determining suspected polluted enterprises according to the source area of the overproof pollutants and the distribution information of the polluted enterprises in the area to be monitored.
9. VOCs pollutant traceability system based on monitoring of navigating includes:
the navigation vehicle is used for navigating according to a preset navigation route in an area to be monitored;
the Fourier infrared spectrometer is carried on the navigation vehicle and used for detecting the infrared spectrum of the ambient atmosphere;
the weather detector is carried on the navigation vehicle and used for detecting weather information of ambient atmosphere;
the VOCs contaminant traceability terminal of claim 8, further comprising a source of VOCs contaminant.
10. The VOCs pollutant tracing system based on navigational monitoring of claim 9, wherein the fourier infrared spectrometer comprises an infrared source, an interferometer, a plane mirror, an open white pool, a parabolic mirror, and a detector, wherein infrared beams radiated by the infrared source enter a gas chamber of the open white pool through the plane mirror after being modulated by the interferometer, the infrared beams are reflected in the open white pool several times, and after reaching a target optical path, the beams are emitted from the open white pool to the parabolic mirror, and after being reflected by the parabolic mirror, the beams are converged at the detector, and the detector detects infrared signals.
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