CN106483051B - A kind of device and mobile terminal for mobile terminal measurement atmosphere particle concentration - Google Patents
A kind of device and mobile terminal for mobile terminal measurement atmosphere particle concentration Download PDFInfo
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- CN106483051B CN106483051B CN201610860727.6A CN201610860727A CN106483051B CN 106483051 B CN106483051 B CN 106483051B CN 201610860727 A CN201610860727 A CN 201610860727A CN 106483051 B CN106483051 B CN 106483051B
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- 239000002245 particle Substances 0.000 title claims abstract description 37
- 238000005259 measurement Methods 0.000 title claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000013618 particulate matter Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012491 analyte Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000000790 scattering method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
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Abstract
The invention discloses a kind of device for mobile terminal measurement atmosphere particle concentration and including the mobile terminal of the device, the mobile terminal has camera and flash lamp, and described device includes the APP software module of particulate matter detection module and operation on mobile terminals；Particulate matter detection module includes optical filter, light intensity detector, photoelectric signal conversion device, signal calculation processing module；Flash lamp, which emits beam, generates scattering light on the particulate matter being incident in atmosphere, the back-scattering light of wave band needed for optical filter is chosen, light intensity detector detects the backscattering optical signal that optical filter is chosen, photoelectric signal conversion device converts optical signals to electric signal, signal calculation processing module handles electric signal, real-time atmosphere particle concentration data is calculated, and is shown by APP software module.Using device disclosed by the invention and mobile terminal can mobile monitor atmosphere particle concentration in real time, and be convenient for carrying.
Description
Technical field
The invention belongs to field of signal processing, and in particular to one kind can measure the mobile terminal dress of atmosphere particle concentration
It sets.
Background technique
The existing method that on-line real-time measuremen Atmospheric Grains concentration may be implemented is passed through using optical scattering method
Detection emergent light is incident on the scattered light intensity that dust generates in atmosphere to judge the concentration of Atmospheric Grains.Common method is logical
Detection side scattered light (in the lateral of outgoing optical propagation direction) or back-scattering light are crossed (in the negative side of outgoing optical propagation direction
To) light intensity judge the concentration of Atmospheric particulates.
The particulate matter in atmosphere, such as patent are detected proposed in the prior art using mobile phone
201410425878.X, 201120382270.5,201410539575.0,201420483192.1, it is all using external inspection
It surveys program in device combination mobile phone to detect, be independent from each other between detection device and mobile phone, mobile phone is only intended to record number
According to tool, some characteristics of mobile phone itself are not used in technology really, structure is also very burdensome.External detection device is
Special instrument, it is expensive and is unhandy to carry about.
Summary of the invention
Goal of the invention: aiming at the problems existing in the prior art, the invention discloses a kind of measurements for mobile terminal
The device of atmosphere particle concentration, the device can mobile monitor atmosphere particle concentration in real time, and be convenient for carrying.
Technical solution: a kind of device for mobile terminal measurement atmosphere particle concentration, the mobile terminal have and take the photograph
As head and flash lamp, described device includes the APP software module of particulate matter detection module and operation on mobile terminals；Described
Grain analyte detection module includes optical filter, light intensity detector, photoelectric signal conversion device, signal calculation processing module；
The flash lamp, which emits beam, generates scattering light, wave band needed for optical filter is chosen on the particulate matter being incident in atmosphere
Back-scattering light, light intensity detector detects the backscattering optical signal that optical filter is chosen, and photoelectric signal conversion device is by light intensity
The optical signal that detector detects is converted to electric signal, and signal calculation processing module handles the electric signal converted out, counts
Calculation obtains real-time atmosphere particle concentration data, and is shown by APP software module.
For the ease of signal processing, needs the analog electrical signal for converting out photoelectric conversion device to be amplified to certain value and turn
It is changed to digital electric signal, thus the signal calculation processing module further includes operational amplification circuit and analog-to-digital conversion module.
Preferably, the particulate matter detection module further includes collector lens, and collector lens is mounted on the outside of optical filter, optically focused
The effect of lens is to collect stray light, focuses on light on light intensity detector after filter plate.
Optical filter and light intensity detector are installed on beside mobile terminal camera and flash lamp, are chosen and are dissipated backwards conducive to reception
Penetrate the optimal location and area of light.Preferably, the optical filter and light intensity detector are that ring-type is enclosed in mobile terminal camera
And around flash lamp.
Preferably, the particulate matter detection module further includes high-pass filtering circuit, the cutoff frequency of the high-pass filtering circuit
Rate is to dodge the flash frequency turned off the light, and will be filtered lower than the noise of flash frequency in this way, therefore signal-to-noise ratio gets a promotion, detection
Sensitivity is higher.
Particulate matter detection module may include multiple optical filters and corresponding light intensity detector, and each optical filter is chosen different
The back-scattering light of wave band, each light intensity detector detect the backscattering optical signal that corresponding optical filter is chosen, in this way can benefit
It is detected with multiwave light, then comprehensive analysis is carried out to data to improve accuracy rate.
Preferably, the multiple optical filter and corresponding light intensity detector group be circlewise enclosed in mobile terminal camera and
Around flash lamp.
Preferably, the multiple optical filter and corresponding light intensity detector are evenly distributed on mobile terminal camera and flash of light
Around lamp.
In order to which the mobile terminal to not yet installation measurement atmosphere particle concentration device is transformed, described device further includes
Signal output module, the electric signal that the signal output module can convert out photoelectric signal conversion device are sent to mobile terminal
Signal input interface.
The invention also discloses a kind of mobile terminals, have camera and flash lamp, further include above-mentioned for mobile whole
The device of end measurement atmosphere particle concentration.
The utility model has the advantages that compared with prior art, it is disclosed by the invention to measure atmosphere particle concentration for mobile terminal
Device have the advantages that 1, described device can real-time mobile monitor, solving traditional environment monitoring device can not move, body
Huge, the not high disadvantage of expensive, popularity rate of product；2, described device can be installed on mobile phone, tablet computer, PDA or other
Mobile terminal carries and uses convenient for individual；3, the atmosphere particle concentration measured can pass through the APP software on mobile terminal
It has been shown that, and can real-time Transmission form big data on the net, play monitoring in real time and form public meteorological data.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the present invention for the device of mobile terminal measurement atmosphere particle concentration；
Fig. 2 is the side view and light path schematic diagram of mobile terminal in embodiment 1；
Fig. 3 is the rearview of mobile terminal in embodiment 1；
Fig. 4 is the implementation flow chart that atmosphere particle concentration is measured in embodiment 1；
Fig. 5 is the implementation flow chart that atmosphere particle concentration is measured in embodiment 2；
Fig. 6 is the rearview of mobile terminal in embodiment 3；
Fig. 7 is the side view and rearview of mobile terminal in embodiment 4.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated.
1- collector lens in attached drawing, 2- optical filter, 3- light intensity detector, 4- flash lamp and camera, 5- flash lamp, 6- take the photograph
As head, 7- collector lens, optical filter and light intensity detector；8- photoelectric conversion device and signal output module.
Fig. 1 is structural schematic diagram of the present invention for the device of mobile terminal measurement atmosphere particle concentration；Flash lamp hair
White light is incident in air out, and the particulate matter in air is scattered white light, and wherein back-scattering light only has after filter plate
The light of specific band is detected by light intensity detector, and the optical signal that photoelectric signal conversion device detects light intensity detector turns
It is changed to electric signal, signal calculation processing module handles the electric signal converted out, real-time Atmospheric particulates are calculated
Concentration data, and shown by APP software module.
Embodiment 1:
Fig. 2 is the side view and light path schematic diagram of mobile terminal in embodiment 1, it can be seen that collector lens 1, optical filter 2
With the structure of light intensity detector 3.In the present embodiment, using blue light as the light of atmospheric sounding particulate matter, the blue wave band that uses
For 425-465nm, corresponding optical filter is 425-465nm through wave band.The white light that flash lamp issues is incident in air, air
In particulate matter white light is scattered, wherein back-scattering light after collector lens focus, wave band be 425-465nm blue light
Light in addition is filtered out by filter plate, and light intensity detector detects blue light, and photoelectric signal conversion device detects light intensity detector
To optical signal be converted to electric signal.Signal calculation processing module handles the electric signal converted out, is calculated in real time
Atmosphere particle concentration data, and shown by APP software module.The electric signal directly converted due to optical signal is very
It is faint, it generally may require that Weak current is converted into voltage signal and measures after being amplified to certain value and count by amplifying circuit
It calculates, realizes that the circuit of this function is referred to as operational amplification circuit.Amplified electric signal carries out analog-to-digital conversion, and simulation is believed
Number digital signal is converted to, to carry out calculation processing.Above-mentioned optical filter is not limited to a certain wave band, can be visible light wave range
Any one section of wave band.
Fig. 3 is the rearview of mobile terminal in embodiment 1, illustrates the position of collector lens, optical filter and light intensity detector
It sets, can be the annular of encirclement flash lamp 5 and camera 6, as shown in Fig. 3-(a)；Or shown in other shapes such as Fig. 3-(b).Filter
Mating plate and light intensity detector are installed on beside mobile terminal camera and flash lamp, are chosen and are conducive to receive the optimal of back-scattering light
Position and area.
Fig. 4 is the implementation flow chart that atmosphere particle concentration is measured in embodiment 1.It is dense that the present invention measures Atmospheric Grains
The method of degree is that it is big to calculate to be incident on the scattered light intensity that dust generates in atmosphere by detection emergent light using optical scattering method
The concentration of particulate matter in gas.Since there are dark current in the influence and device circuitry of natural light or other light to draw in environment
The noise risen needs to remove environment influence and noise for the accuracy for improving measurement result.It is tested first by switch.The
Two steps do not open flash lamp and carry out signal testing (taking pictures), and light intensity detector carries out the detection of background signal and background noise, background
Signal refers to that environment light enters the light of collector lens, and background noise refers to noise caused by the dark current of device circuitry.The
Three steps open flash lamp and carry out signal detection (taking pictures) again, and the signal detected twice is divided by or is subtracted each other, obtained
The coherent signal of atmosphere particle concentration.
It should be noted that the position shot twice should be in same position, with the background signal and sheet for ensuring to obtain twice
Back noise signal is identical.Not have object nearby when taking pictures simultaneously, should not against intense light source, so as not to object reflected light or
Intense light source influences signal.
Embodiment 2:
It is that flash lamp sudden strain of a muscle once obtains related data in embodiment 1, in order to reduce noise as far as possible, flash lamp one can be given
Fixed flash frequency (dodging and switching between not dodging), such as flash frequency is 500Hz, therefore the letter that light intensity detector receives
Number it is the frequency as flash lamp, then high-pass filtering circuit module is set, the signal of this frequency is extracted, is lower than this
The noise of a frequency will be filtered, therefore signal-to-noise ratio gets a promotion, and detectivity is higher.
Increase a phase lock circuitry in the present embodiment unlike the first embodiment, effect is to extract specific frequency
Signal, the present embodiment are the signal for extracting flash frequency, the noise for being lower than this frequency are filtered off, to improve signal-to-noise ratio.Phase lock circuitry
It can also be replaced using other high-pass filtering circuits.Fig. 5 is the implementing procedure that atmosphere particle concentration is measured in embodiment 2
Figure.
Embodiment 3:
Embodiment 1 and embodiment 2 are detected using blue light, if detected using multiwave light,
More accurate data will be obtained by carrying out comprehensive analysis to data again.Since flash light emission is white light, it is possible to utilize
Multiband light detects to obtain data.At this point, particulate matter detection module includes multiple optical filters and corresponding light intensity detector,
Each optical filter chooses the back-scattering light of different-waveband, and each light intensity detector detects the backscattering that corresponding optical filter is chosen
Optical signal.
It is respectively the red, green, blue of 630-780nm, 490-580nm, 425-465nm that wave band is utilized in the present embodiment,
Grain analyte detection module includes feux rouges filter plate and feux rouges light intensity detector 8, green light filter plate and green light light intensity detector 9, blue light
Filter plate and blue light light intensity detector 10, collecting wave band respectively is 630-780nm, 490-580nm, 425-465nm backwards to scattered
Penetrate optical signal.The optical signal that three light intensity detectors detect is respectively converted into electric signal and is handled, signal calculation processing mould
Software program in block analyzes three groups of data to obtain than embodiment 1 and the more detailed particle of embodiment 2
Object data.
As shown in fig. 6, feux rouges filter plate and feux rouges light intensity detector 8, green light filter plate and green light light intensity detector 9, blue
Light filter plate and blue light light intensity detector 10, which can be organized, to be circlewise enclosed in around mobile terminal camera and flash lamp, such as Fig. 6-
(a) shown in；It can also be evenly distributed on around mobile terminal camera and flash lamp, as shown in Fig. 6-(b).
The wave band utilized is not necessarily these three wave bands, can carry out the selection of wave band according to the actual situation.
Embodiment 4
In embodiment 1,2,3, collector lens, filter plate and light intensity detector are mounted on the inside of mobile terminal, optical telecommunications
Number conversion equipment is mounted on Mobile terminal main board, and signal calculation processing module can use the computing function of mobile terminal CPU
It realizes, can also use an individual chip, this chip is mounted on Mobile terminal main board.Existing not yet installation is surveyed
Determine the mobile terminal of atmosphere particle concentration device, above-mentioned hardware installation mode is not appropriate for, and especially Mobile terminal main board is simultaneously
It is not easy to modify.
Present embodiments provide a mountable device in existing mobile terminal backboard, the device is by collector lens and filter
Mating plate, light intensity detector, photoelectric signal conversion device become one, and increase signal output module.Signal in the present embodiment
Output module is bluetooth output module, and the electric signal that photoelectric signal conversion device is converted out is sent by signal bluetooth output module
Bluetooth input interface on to mobile terminal, is transferred to mobile terminal CPU, utilizes the computing function processing of mobile terminal CPU, meter
Calculation obtains real-time atmosphere particle concentration data, is shown later by APP software module.As shown in fig. 7, in embodiment 4
It is mounted with the mobile terminal side view and rearview of measurement atmosphere particle concentration device.
Claims (9)
1. a kind of device for mobile terminal measurement atmosphere particle concentration, the mobile terminal have camera and flash of light
Lamp, it is characterised in that described device includes the APP software module of particulate matter detection module and operation on mobile terminals；Described
Grain analyte detection module includes optical filter, light intensity detector, photoelectric signal conversion device and signal calculation processing module；
The flash lamp, which emits beam, generates scattering light, the back of wave band needed for optical filter is chosen on the particulate matter being incident in atmosphere
To scattering light, light intensity detector detects the backscattering optical signal that optical filter is chosen, and photoelectric signal conversion device is by light intensity detection
The optical signal that device detects is converted to electric signal, and signal calculation processing module handles the electric signal converted out, calculates
It is shown to real-time atmosphere particle concentration data, and by APP software module；
Wherein, during measuring atmosphere particle concentration, using flash lamp or light intensity detector carry out certain operation come
Reduce the interference of noise.
2. the device according to claim 1 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Particulate matter detection module further includes collector lens, and collector lens is mounted on the outside of optical filter.
3. the device according to claim 1 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Optical filter and light intensity detector are that ring-type is enclosed in around mobile terminal camera and flash lamp.
4. the device according to claim 1 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Particulate matter detection module further includes high-pass filtering circuit, and the cutoff frequency of the high-pass filtering circuit is to dodge the flash of light frequency turned off the light
Rate.
5. the device according to claim 1 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Particulate matter detection module includes multiple optical filters and corresponding light intensity detector, and each optical filter chooses dissipating backwards for different-waveband
Light is penetrated, each light intensity detector detects the backscattering optical signal that corresponding optical filter is chosen.
6. the device according to claim 5 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Multiple optical filters and corresponding light intensity detector group are circlewise enclosed in around mobile terminal camera and flash lamp.
7. the device according to claim 5 for mobile terminal measurement atmosphere particle concentration, which is characterized in that described
Multiple optical filters and corresponding light intensity detector are evenly distributed on around mobile terminal camera and flash lamp.
8. the device according to claim 1 for mobile terminal measurement atmosphere particle concentration, which is characterized in that also wrap
Signal output module is included, the electric signal that the signal output module converts out photoelectric signal conversion device is sent to mobile terminal
Signal input interface.
9. a kind of mobile terminal has camera and flash lamp, which is characterized in that the mobile terminal includes claim 1 to 8
Any one of described in for mobile terminal measurement atmosphere particle concentration device.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3901612A1 (en) * | 2020-04-23 | 2021-10-27 | Sensirion AG | Integrated particulate matter sensor with cavity |
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| CN111707453B (en) * | 2018-07-24 | 2022-11-04 | 广州柏曼光电科技有限公司 | Light source testing method and system |
| CN110146423A (en) * | 2019-06-13 | 2019-08-20 | 厦门华厦学院 | Fine particle concentration detection device |
| CN111879672A (en) * | 2020-08-19 | 2020-11-03 | 中煤科工集团重庆研究院有限公司 | High-precision open type easily-maintained dust concentration detection device and method |
| CN113588503A (en) * | 2021-07-13 | 2021-11-02 | 浙江建安检测研究院有限公司 | Oil smoke online monitoring system for catering operation environment |
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| CN104038599A (en) * | 2013-11-29 | 2014-09-10 | 陕西易阳科技有限公司 | Intelligent mobile phone with dust detecting and prompting functions |
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