CN110208189A - Inexpensive Portable quick indoor air quality detector and statistical method - Google Patents
Inexpensive Portable quick indoor air quality detector and statistical method Download PDFInfo
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- CN110208189A CN110208189A CN201910630241.7A CN201910630241A CN110208189A CN 110208189 A CN110208189 A CN 110208189A CN 201910630241 A CN201910630241 A CN 201910630241A CN 110208189 A CN110208189 A CN 110208189A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- 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
- G01N21/3103—Atomic absorption analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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Abstract
Inexpensive Portable quick indoor air quality detector and statistical method.The invention discloses inexpensive Portable quick indoor air quality detectors, including main body, the main body includes outer protecting shell body, it further include being installed in the sampling bottle at the top of outer protecting shell body and being installed in the data of outer protecting shell body front surface to show and control mechanism and be installed in the collecting mechanism of side and analysis institution in outer protecting shell body, data are shown and control mechanism includes display screen and control panel, the display screen is shown for data, for the control panel for detector to be adjusted, collecting mechanism includes PCB main board；By many experiments number of chambers, according to analysis, we have found that the numerical value such as benzene are with formaldehyde numerical value, there are some linears, so only retaining formaldehyde examination mechanism, to realize the accurate detection of formaldehyde, the content of the substances numerical value such as benzene is calculated by the numerical value of formaldehyde again, it is able to achieve our low-cost and easy-tos and operates portable original intention, it can be widely applied to indoor air quality detection, testing result can also be used as base reference early period of law ruling.
Description
Technical field
The invention belongs to Detection of Air Quality technical fields, and in particular to inexpensive Portable quick indoor air quality detector
And statistical method.
Background technique
With the continuous improvement of people's living standards, indoor decoration pollution is increasingly valued by people, China is also made
Respective country standard is determined and specified in more detail is made that detection method and the content restriction of pernicious gas, what is mainly executed has GB/
T18883-2002 " Indoor Air Quality standards " and GB50325-2010 " civil building engineering indoor environmental pollution control rule
Model ", detection method employed in standard needs to use the experiment such as air sampler, visible spectrophotometer, gas chromatograph
Room special equipment needs to draw the reasons such as curve and causes that testing cost is high, process is complicated, the period is tediously long, and only speciality chemical is real
It tests room to be just able to achieve, seriously can not meet the market demand and is withstood forces beyond consumer, various electrochemistry are hand-held in this context
Formula detector is announced to the world splendidly, but Electrochemical detector again generally existing error it is big, sensor used is irregular, consumer without
Method distinguishes the problems such as being even misled into.
We analyze related national standard and instrument, pass through built-in detection curve, the cheap common durable component of replacement
And many experiments number of chambers, according to analysis, we have developed a set of inexpensive Portable quick indoor air quality detector, retain national standard
Cost is greatly reduced under the premise of defined chemical detection marrow, while keeping instrument simple to operation and being convenient for carrying, data direct-reading,
Field print greatly improves working efficiency and meets the market demand.
We study GB/T18883-2002 and GB50325-2010 first, and the method for discovery detection formaldehyde is
GB/T18204.2-2014 " public places sanitary method of inspection part 2: chemical pollutant ", the instrument needed is predominantly big
Gas sampling and visible spectrophotometer；Detection benzene,toluene,xylene, TVOC are required to use gas chromatograph.Further grind
Study carefully we have found that air sampler and the simple and convenient cost effective operation of visible spectrophotometer principle, gas chromatograph are more multiple
It is miscellaneous to be not easy to study, but according to analysis, we have found that the numerical value such as benzene are with formaldehyde numerical value, there are a constant linear passes by many experiments number of chambers
System, so the accurate detection of our research direction main attack formaldehyde, then obtains the numerical value such as benzene for reference by formolite number, thus I
Propose inexpensive Portable quick indoor air quality detector and statistical method.
Summary of the invention
The purpose of the present invention is to provide inexpensive Portable quick indoor air quality detector and statistical methods, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme: inexpensive Portable quick indoor air quality detector,
Including main body, the main body includes outer protecting shell body, further includes being installed in sampling bottle at the top of outer protecting shell body and being installed in outer protecting shell
The data of body front surface show and control mechanism and are installed in the collecting mechanism of side and analysis institution in outer protecting shell body.
Preferably, the data are shown and control mechanism includes display screen and control panel, and the display screen is for counting
According to display, the control panel is for being adjusted detector.
Preferably, the collecting mechanism includes PCB main board, and the two sides of the PCB main board are mounted on asepwirator pump, described
The bottom of PCB main board is connected with PWM control module, and the PWM control module is used for the rotational speed regulation of asepwirator pump.
Preferably, the analysis institution includes print.er port and detection port, and the print.er port is located at outer protecting shell body
Inside bottom, the detection port are located at the top of outer protecting shell body, and the bottom of the detection port is located at the inside of outer protecting shell body
Light emitting diode is installed, the bottom of the light emitting diode is equipped with light intensity sensor module, the outer protecting shell body and shines
Diode and light intensity sensor module pass through electric connection.
Preferably, the surface of the outer protecting shell body is provided with buzzer.
Preferably, the main body further includes battery pack, and the battery pack is located at the bottom of PCB main board, the battery pack with
PCB main board and PWM control module and asepwirator pump and print.er port and light intensity sensor module and light emitting diode and display screen with
Buzzer and control panel pass through electric connection.
Preferably, the surface of the PCB main board is installed with computing module.
Preferably, the model 370 of the asepwirator pump.
Preferably, the wavelength of the light emitting diode is 630nm.
Preferably, inexpensive Portable quick indoor air quality statistical method, includes the following steps:
A, the content of formaldehyde in air can be obtained by the light intensity sensor module and light emitting diode analysis；
B, by formula obtained after many tests, formaldehyde described in benzene content ≈ can be counted by the computing module
Content/10, benzene content+0.003 described in toluene level ≈, described in benzene content * 2 described in xylene content ≈, the content ≈ of TVOC
Content of formaldehyde+benzene content+the toluene level+xylene content+0.003.
Compared with prior art, the beneficial effects of the present invention are:
(1) by many experiments number of chambers according to analysis we have found that the numerical value such as benzene and formaldehyde numerical value are there are some linear,
So component testing agencies other in the acquisition device of script removal is only retained formaldehyde examination mechanism, to realize formaldehyde
Accurate detection, then the content of the substances numerical value such as benzene is calculated by the numerical value of formaldehyde and reference is provided, on the one hand reduce dress
The cost set while the diversification for realizing function.
(2) by integrating acquisition device and analytical equipment, so that two sseparated steps are present originally for acquisition and analysis
Can integral operational, while increasing the portability of device, data direct-reading, field print, greatly improve can working efficiency and
Meet the demand in market.
(3) rotational speed regulation is carried out using asepwirator pump of the PWM control module to model 370, stable flow may be implemented
Control, alternative existing flowmeter, and the price of single flowmeter is approximately equal to 50 times of the price of 370 asepwirator pumps, and adopts
The desired substitution tungsten light source of light emitting diode 4 is surveyed with formaldehyde is met, to further reduce costs, while asepwirator pump is just
It replaces and safeguards in the later period.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is schematic diagram of internal structure of the invention；
Fig. 3 is data form schematic diagram of the invention；
Fig. 4 is the scatter plot of p and A value of the invention；
In figure: 1, sampling bottle；2, display screen；3, outer protecting shell body；4, print.er port；41, light intensity sensor module；42, it sends out
Optical diode；43, port is detected；5, control panel；6, battery pack；7, PCB main board；71, PWM control module；72, asepwirator pump.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-Fig. 4 is please referred to, the present invention provides a kind of technical solution: inexpensive Portable quick indoor air quality detector,
Including main body, main body includes outer protecting shell body 3, and the surface of outer protecting shell body 3 is provided with buzzer, further includes being installed in outer protecting shell body 3
The sampling bottle 1 at top and the data for being installed in 3 front surface of outer protecting shell body show and control mechanism and are installed in outer protecting shell body 3
The collecting mechanism of inside and analysis institution, by many experiments number of chambers according to analysis we have found that the numerical value such as benzene and formaldehyde numerical value exist
Some linear, so component testing agencies other in the acquisition device of script removal is only retained into formaldehyde examination mechanism,
To realize the accurate detection of formaldehyde, then the content of the substances numerical value such as benzene is calculated by the numerical value of formaldehyde and reference is provided, one
Aspect reduces the cost of device while realizing the diversification of function.
In the present embodiment, it is preferred that data are shown and control mechanism includes display screen 2 and control panel 5, display screen 2
It is shown for data, control panel 5 is for being adjusted detector.
In the present embodiment, it is preferred that collecting mechanism includes PCB main board 7, and the two sides of PCB main board 7 are mounted on asepwirator pump
72, the bottom of PCB main board 7 is connected with PWM control module 71, and PWM control module 71 is used for the rotational speed regulation of asepwirator pump 72.
In the present embodiment, it is preferred that analysis institution includes print.er port 4 and detection port 43, and print.er port 4 is located at outer shield
The inside bottom of shell 3, detection port 43 are located at the top of outer protecting shell body 3, and the bottom of detection port 43 is located at outer protecting shell body 3
Inside is equipped with light emitting diode 42, and the bottom of light emitting diode 42 is equipped with light intensity sensor module 41, outer protecting shell body 3 and hair
Optical diode 42 and light intensity sensor module 41 pass through electric connection.
In the present embodiment, it is preferred that main body further includes battery pack 6, and battery pack 6 is located at the bottom of PCB main board 7, battery pack 6
With PCB main board 7 and PWM control module 71 and asepwirator pump 72 and print.er port 4 and light intensity sensor module 41 and light emitting diode
42 pass through electric connection with display screen 2 and buzzer and control panel 5, and the surface of PCB main board 7 is installed with computing module,
The wavelength of light emitting diode 42 is 630nm, the model 370 of asepwirator pump 72, using PWM control module 71 to model 370
Asepwirator pump 72 carries out rotational speed regulation, and stable flow control, alternative existing flowmeter, and single flowmeter may be implemented
Price is approximately equal to 50 times of the price of 370 asepwirator pumps 72, and surveys the desired substitution tungsten lamp of light emitting diode 4 using formaldehyde is met
Light source, to further reduce costs, while asepwirator pump 72 was replaced and safeguarded convenient for the later period.
In the present embodiment, it is preferred that inexpensive Portable quick indoor air quality statistical method includes the following steps:
A, the content of formaldehyde that can be obtained in air is analyzed by light intensity sensor module 41 and light emitting diode 42；
B, by formula obtained after many tests, content of formaldehyde/10 benzene content ≈ can be counted by computing module,
Toluene level ≈ benzene content+0.003, content ≈ content of formaldehyde+benzene content+first of xylene content ≈ benzene content * 2, TVOC
Benzene content+xylene content+0.003.
The working principle of the invention and process for using: the device in use, can allow fixed tripod use, by device with
In the space that fixed tripod detects needed for being positioned and secured at, sampling bottle 1 is connect with outer protecting shell body 3 then, control can be passed through
Panel 5 processed device can be carried out parameter setting can starter the air of 10L can be carried out by the operation of asepwirator pump 72
Sampling, while the air flow control, it can be achieved that stable, sampling are controlled by revolving speed of the PWM control module 71 to asepwirator pump 72
After buzzer start to alarm, collected air sample is then poured into 1cm cuvette, will after addition developing solution colour developing
The inside that cuvette is placed on detection port 43 starts to detect, and examines GB/T18204.2-2014 by research public places sanitary
The discovery of 7.2 specified in more detail, PARA FORMALDEHYDE PRILLS(91,95) testing requirements are wavelength 630nm light sources, so by using cheap 630nm
Wavelength light source light emitting diode 42, and 42 output intensity of light emitting diode is stablized, it completely can be with the higher tungsten of fictitious hosts
Lamp source because wavelength limits, and can remove high-performance grating and wavelength control system completely；
As for import photoelectric converter, its major function is measurement absorbance A, by inquiring related data, discovery absorbance
Refer to that light passes through the transmitted intensity after solution or substance with the light by the incident intensity before solution or a certain substance
The denary logarithm of ratio, that is, lg (L0/L1), wherein L0For incident intensity, L1For transmitted light intensity, the molten because being known as of it is influenced
Agent, concentration, temperature etc., it is seen that we only need to find suitable light intensity sensor measurement light intensity, then by calculating
Absorbance value out, so that it may which the expensive import photoelectric converter of substitution completely, we are only several by the selected price on the market of screening
The light intensity sensor module 41 of yuan, a series of scale value sample for different concentration of formaldehyde that then we obtain laboratory is successively
It is put into the light intensity sensor module 41+ light emitting diode 42 of our assemblings, a series of light intensity values are measured, as shown in figure 3, wherein sample
Product scale value p is formaldehyde numerical value of the sample in laboratory testing；L value is the light intensity value that light intensity sensor irradiates that sample obtains；A value
For the absorbance value being calculated by light intensity, A=lg (L0/L1)；L0: incident intensity, experimental data 1737；L1: transmitted light
By force；And thus obtained absorbance value A is inputted Excel table as x value and formaldehyde sample concentration scale value p as y value, it draws
Its height of scatterplot graph discovery meets unitary linear functional relation, by finding statistical function LINEST in function option, obtains tiltedly
Rate, that is, parameter a=0.198, thus we obtain formaldehyde p=(A-AO) * 0.198, wherein A is sample absorbance value, A0For blank
Sample absorbance value, while we compare GB/T18204.2-2014 7.2.6 calculation formula p=(A-AO)*BS/V0, both discoveries
It is identical, i.e. a=BS/V0, side demonstrates the correctness of our thinkings and the accuracy of instrument；
It is analyzed simultaneously by laboratory mass data, show that benzene,toluene,xylene, the numerical value of TVOC and formaldehyde have centainly
Linear relationship, by the way that calculation formula has been set in advance, this sampling device can detect formaldehyde, benzene,toluene,xylene, TVOC
Numerical value, in which:
Formaldehyde/10 benzene ≈；
Toluene ≈ benzene+0.003；
Dimethylbenzene ≈ benzene * 2；
TVOC ≈ formaldehyde+benzene+toluene+dimethylbenzene+0.003；
And it can intuitively be read by display screen 2, while it is defeated when can print after detection to pass through print.er port 4
The numerical value of formaldehyde, benzene,toluene,xylene, TVOC out；
By repeatedly testing repeatedly, the method detector test numerical value and the laboratory values goodness of fit are high, and detection is stablized not
Deviate, multiplicating data height is consistent, is able to achieve our low-cost and easy-tos and operates portable original intention, can be widely applied to interior
Detection of Air Quality, testing result can also be used as base reference early period of law ruling.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. inexpensive Portable quick indoor air quality detector, including main body, it is characterised in that: the main body includes outer protecting shell body
It (3), further include that the sampling bottle (1) being installed at the top of outer protecting shell body (3) and the data for being installed in outer protecting shell body (3) front surface are shown
And control mechanism and the collecting mechanism being installed on the inside of outer protecting shell body (3) and analysis institution.
2. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the data are aobvious
Show and control mechanism includes display screen (2) and control panel (5), the display screen (2) shows for data, the control plane
Plate (5) is for being adjusted detector.
3. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the harvester
Structure includes PCB main board (7), and the two sides of the PCB main board (7) are mounted on asepwirator pump (72), the bottom of the PCB main board (7)
It is connected with PWM control module (71), the PWM control module (71) is used for the rotational speed regulation of asepwirator pump (72).
4. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the analysis machine
Structure includes print.er port (4) and detection port (43), and the print.er port (4) is located at the inside bottom of outer protecting shell body (3), described
Detection port (43) is located at the top of outer protecting shell body (3), and the bottom of detection port (43) is located at the inside of outer protecting shell body (3)
It is equipped with light emitting diode (42), the bottom of the light emitting diode (42) is equipped with light intensity sensor module (41), described outer
Protective case body (3) and light emitting diode (42) and light intensity sensor module (41) pass through electric connection.
5. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the outer protecting shell
The surface of body (3) is provided with buzzer.
6. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the main body is also
Including battery pack (6), the battery pack (6) is located at the bottom of PCB main board (7), the battery pack (6) and PCB main board (7) with
PWM control module (71) and asepwirator pump (72) and print.er port (4) and light intensity sensor module (41) and light emitting diode (42)
Pass through electric connection with display screen (2) and buzzer and control panel (5).
7. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the PCB master
The surface of plate (7) is installed with computing module.
8. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: the asepwirator pump
(72) model 370.
9. low cost Portable quick indoor air quality detector according to claim 1, it is characterised in that: described luminous two
The wavelength of pole pipe (42) is 630nm.
10. the statistical method of inexpensive Portable quick indoor air quality described in right according to claim 1~9 one, feature
It is, includes the following steps:
A, the content of formaldehyde in air can be obtained by the light intensity sensor module (41) and light emitting diode (42) analysis；
B, by formula obtained after many tests, formaldehyde described in benzene content ≈ can be counted by the computing module and contained
Amount/10, benzene content+0.003 described in toluene level ≈, first described in benzene content * 2 described in xylene content ≈, the content ≈ of TVOC
Aldehyde+benzene content+the toluene level+xylene content+0.003.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630241.7A CN110208189A (en) | 2019-07-12 | 2019-07-12 | Inexpensive Portable quick indoor air quality detector and statistical method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910630241.7A CN110208189A (en) | 2019-07-12 | 2019-07-12 | Inexpensive Portable quick indoor air quality detector and statistical method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110208189A true CN110208189A (en) | 2019-09-06 |
Family
ID=67797346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910630241.7A Withdrawn CN110208189A (en) | 2019-07-12 | 2019-07-12 | Inexpensive Portable quick indoor air quality detector and statistical method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110208189A (en) |
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2019
- 2019-07-12 CN CN201910630241.7A patent/CN110208189A/en not_active Withdrawn
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Application publication date: 20190906 |
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