CN106483051A - A kind of device and mobile terminal measuring atmosphere particle concentration for mobile terminal - Google Patents

A kind of device and mobile terminal measuring atmosphere particle concentration for mobile terminal Download PDF

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Publication number
CN106483051A
CN106483051A CN201610860727.6A CN201610860727A CN106483051A CN 106483051 A CN106483051 A CN 106483051A CN 201610860727 A CN201610860727 A CN 201610860727A CN 106483051 A CN106483051 A CN 106483051A
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China
Prior art keywords
mobile terminal
signal
particle concentration
light intensity
atmosphere particle
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CN201610860727.6A
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Chinese (zh)
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CN106483051B (en
Inventor
叶纯
杨钰婷
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Nanjing CEC Panda FPD Technology Co Ltd
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Nanjing Huadong Electronics Information and Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • G01N15/075

Abstract

The invention discloses a kind of measure the device of atmosphere particle concentration and the mobile terminal including this device for mobile terminal, described mobile terminal carries photographic head and flash lamp, and described device includes particulate matter detection module and operation APP software module on mobile terminals;Particulate matter detection module includes optical filter, light intensity detector, photoelectric signal conversion device, signal of change processing module;Flash lamp emits beam and produces scattered light on the particulate matter inciding in air, the back-scattering light of wave band needed for optical filter selection, light intensity detector detects the backscattering optical signal that optical filter is chosen, photoelectric signal conversion device converts optical signals to the signal of telecommunication, signal of change processing module carries out to the signal of telecommunication processing, is calculated real-time atmosphere particle concentration data, 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

A kind of device and mobile terminal measuring atmosphere particle concentration for mobile terminal
Technical field
The invention belongs to field of signal processing is and in particular to a kind of mobile terminal that can measure atmosphere particle concentration fills Put.
Background technology
The existing method that can be implemented in line real-time detection Atmospheric Grains concentration is using optical scattering method, passes through Detection emergent light incides the concentration to judge Atmospheric Grains for the scattered light intensity that in air, dust produces.Common method is logical Cross detection side scattered light (lateral in outgoing optical propagation direction) or the back-scattering light (negative side in outgoing optical propagation direction To) light intensity to judge the concentration of Atmospheric particulates.
Utilization mobile phone proposed in prior art is detecting the particulate matter in air, such as patent 201410425878.X, 201120382270.5,201410539575.0,201420483192.1, it is all using external inspection Survey device to detect with reference to mobile phone Program, be separate between detection means and mobile phone, mobile phone is only intended to record number According to instrument, really do not use some characteristics of mobile phone itself in its technology, structure is also very burdensome.External detection means is Special instrument, it is expensive and is unhandy to carry about.
Content of the invention
Goal of the invention:For problems of the prior art, the invention discloses a kind of mensure for mobile terminal The device of atmosphere particle concentration, this device can mobile monitor atmosphere particle concentration in real time, and be convenient for carrying.
Technical scheme:A kind of device measuring atmosphere particle concentration for mobile terminal, described mobile terminal carries and takes the photograph As head and flash lamp, described device includes particulate matter detection module and operation APP software module on mobile terminals;Described Grain analyte detection module includes optical filter, light intensity detector, photoelectric signal conversion device, signal of change processing module;
Described flash lamp emits beam and produces scattered light on the particulate matter inciding in air, optical filter choose needed for wave band 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 the signal of telecommunication, and signal of change processing module carries out processing to the signal of telecommunication changed out, counts Calculation obtains real-time atmosphere particle concentration data, and is shown by APP software module.
For the ease of signal processing, the analog electrical signal changing out photoelectric conversion device is needed to be amplified to certain value and turn It is changed to digital electric signal, thus described signal of change processing module also includes operational amplification circuit and analog-to-digital conversion module.
Preferably, described particulate matter detection module also includes collecting lenses, and collecting lenses are arranged on outside optical filter, optically focused The effect of lens is to collect veiling glare, so that light can be focused on light intensity detector after filtered.
Optical filter and light intensity detector are installed on mobile terminal camera and flash lamp side, choose and dorsad dissipate beneficial to receiving Penetrate optimal location and the area of light.Preferably, described optical filter and light intensity detector are enclosed in mobile terminal camera for ring-type And around flash lamp.
Preferably, described particulate matter detection module also includes high-pass filtering circuit, the cutoff frequency of described high-pass filtering circuit Rate is to dodge the flashing rate turned off the light, and the noise being so less than flashing rate will be filtered, and therefore signal to noise ratio gets a promotion, and detect Sensitivity is higher.
Particulate matter detection module can 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 detects the backscattering optical signal that corresponding optical filter is chosen, so can profit Detected with multiwave light, then data is carried out comprehensive analysis to improve accuracy rate.
Preferably, the plurality of optical filter and corresponding light intensity detector group be circlewise enclosed in mobile terminal camera and Around flash lamp.
Preferably, the plurality of optical filter and corresponding light intensity detector are evenly distributed on mobile terminal camera and flash of light Around lamp.
In order to transform to the mobile terminal not yet installing mensure atmosphere particle concentration device, described device also includes Signal output module, the signal of telecommunication that photoelectric signal conversion device is changed out can be sent to mobile terminal by described signal output module Signal input interface.
The invention also discloses a kind of mobile terminal, with photographic head and flash lamp, also include above-mentioned for mobile eventually End measures the device of atmosphere particle concentration.
Beneficial effect:Compared with prior art, disclosed by the invention measure atmosphere particle concentration for mobile terminal Device has the advantage that:1st, described device can mobile monitor in real time, solving traditional environment monitoring device cannot move, body Long-pending huge, expensive, popularity rate is not high shortcoming;2nd, described device can be installed on mobile phone, panel computer, PDA or other Mobile terminal, is easy to individual and carries and use;3rd, the atmosphere particle concentration measuring can be by the APP software on mobile terminal Display, and real-time Transmission can form big data on the net, play real-time monitoring and the popular meteorological data of formation.
Brief description
Fig. 1 is the structural representation that the present invention is used for that mobile terminal measures the device of atmosphere particle concentration;
Fig. 2 is the side view of mobile terminal and light path schematic diagram in embodiment 1;
Fig. 3 is the rearview of mobile terminal in embodiment 1;
Fig. 4 is the implementing procedure figure measuring atmosphere particle concentration in embodiment 1;
Fig. 5 is the implementing procedure figure measuring atmosphere particle concentration in embodiment 2;
Fig. 6 is the rearview of mobile terminal in embodiment 3;
Fig. 7 is the side view of mobile terminal and rearview in embodiment 4.
Specific embodiment
With reference to the accompanying drawings and detailed description, it is further elucidated with the present invention.
1- collecting lenses in accompanying drawing, 2- optical filter, 3- light intensity detector, 4- flash lamp and photographic head, 5- flash lamp, 6- takes the photograph As head, 7- collecting lenses, optical filter and light intensity detector;8- photoelectric conversion device and signal output module.
Fig. 1 is the structural representation that the present invention is used for that mobile terminal measures the device of atmosphere particle concentration;Flash lamp is sent out Go out white light and incide in the air, the particulate matter of in the air is scattered to white light, wherein after filtered of back-scattering light only The light of specific band is detected by light intensity detector, and the optical signal that light intensity detector detects is turned by photoelectric signal conversion device It is changed to the signal of telecommunication, signal of change processing module carries out processing to the signal of telecommunication changed out, is calculated real-time Atmospheric particulates Concentration data, and shown by APP software module.
Embodiment 1:
Fig. 2 be in embodiment 1 side view of mobile terminal and light path schematic diagram it can be seen that collecting lenses 1, optical filter 2 Structure with light intensity detector 3.In the present embodiment, using blue light as the light of atmospheric sounding particulate matter, the blue wave band of use For 425-465nm, it is 425-465nm that corresponding optical filter passes through wave band.The white light that flash lamp sends incides in the 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 by filter plate, and light intensity detector detects blue light, and light intensity detector is detected by photoelectric signal conversion device To optical signal be converted to the signal of telecommunication.Signal of change processing module carries out to the signal of telecommunication changed out processing, is calculated in real time Atmosphere particle concentration data, and shown by APP software module.The signal of telecommunication directly being converted due to optical signal is very Faint, typically may require that amplifying circuit is converted into voltage signal Weak current and is amplified to after certain value and measures and count Calculate, the circuit realizing this One function is referred to as operational amplification circuit.The signal of telecommunication after amplification carries out analog digital conversion, by simulation letter Number be converted to digital signal, to carry out calculating process.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 collecting lenses, optical filter and light intensity detector Put, can be for surrounding the annular of flash lamp 5 and photographic head 6, such 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 mobile terminal camera and flash lamp side, choose beneficial to the optimum receiving back-scattering light Position and area.
Fig. 4 is the implementing procedure figure measuring atmosphere particle concentration in embodiment 1.It is dense that the present invention measures Atmospheric Grains The method of degree is using optical scattering method, is calculated greatly by detecting that emergent light incides the scattered light intensity that in air, dust produces The concentration of particulate matter in gas.Due to there is the impact of natural light or other light in environment, and in device circuitry, dark current draws The noise rising, for improving the accuracy of measurement result, needs to remove environmental effect and noise.Tested by switch first.The Two steps are not opened flash lamp and are carried out signal testing (taking pictures), and light intensity detector carries out the detection of background signal and background noise, background Signal refers to that ambient light enters the light of collecting lenses, and background noise refers to the noise caused by the dark current of device circuitry.The Three steps are opened flash lamp and are carried out signal detection (taking pictures) again, detect the signal obtaining twice and are divided by or subtract each other, obtain The coherent signal of atmosphere particle concentration.
It should be noted that the position shooting twice should be in same position, to guarantee the background signal and the basis that obtain twice Back noise signal is identical.Nearby must not have object when taking pictures simultaneously, must not against intense light source, so as not to object reflected light or Intense light source affects 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 flashing rate (switching between dodging and not dodging), such as flashing rate is 500Hz, the letter that therefore light intensity detector receives Number it is the frequency as flash lamp, then arranges high-pass filtering circuit module the signal of this frequency to be extracted, less than this The noise of individual frequency will be filtered, and therefore signal to noise ratio gets a promotion, and detectivity is higher.
Increase a phase lock circuitry in the present embodiment as different from Example 1, its effect is to extract characteristic frequency Signal, the present embodiment is the signal extracting flashing rate, filters off the noise less than this frequency, to improve signal to noise ratio.Phase lock circuitry Can also be replaced using other high-pass filtering circuits.Fig. 5 is the implementing procedure measuring atmosphere particle concentration in embodiment 2 Figure.
Embodiment 3:
Embodiment 1 and embodiment 2 are all to be detected using blue light, if detected using multiwave light, Data is carried out with comprehensive analysis again and will obtain more accurate data.Due to flash light emission for white light it is possible to utilize Multiband light detects and to obtain data.Now, 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.
Wave band is utilized to be respectively the red, green, blue of 630-780nm, 490-580nm, 425-465nm in the present embodiment, Grain analyte detection module includes HONGGUANG filter plate and HONGGUANG light intensity detector 8, green glow filter plate and green glow light intensity detector 9, blue light Filter plate and blue light light intensity detector 10, collecting wave band respectively is dorsad dissipating of 630-780nm, 490-580nm, 425-465nm Penetrate optical signal.The optical signal that three light intensity detectors detect is respectively converted into the signal of telecommunication and is processed, and signal of change processes mould Software program in block is analyzed to three groups of data such that it is able to obtain than embodiment 1 and the more detailed granule of embodiment 2 Thing data.
As shown in fig. 6, HONGGUANG filter plate and HONGGUANG light intensity detector 8, green glow filter plate and green glow light intensity detector 9, blue Light filter plate and blue light light intensity detector 10 can be organized and circlewise be enclosed in around mobile terminal camera and flash lamp, and such as Fig. 6- Shown in (a);Can also be evenly distributed on around mobile terminal camera and flash lamp, such as shown in Fig. 6-(b).
Using wave band be not necessarily these three wave bands, the selection of wave band can be carried out according to practical situation.
Embodiment 4
In embodiment 1,2,3, collecting lenses, filter plate and light intensity detector are arranged on the inside of mobile terminal, optical telecommunications Number conversion equipment is arranged on Mobile terminal main board, and signal of change processing module can utilize the computing function of mobile terminal CPU Realize, it would however also be possible to employ a single chip, this chip is arranged 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, particularly Mobile terminal main board is simultaneously It is not easy to change.
Present embodiments provide a device that may be installed existing mobile terminal backboard, this device is by collecting lenses 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 signal of telecommunication that photoelectric signal conversion device is changed out passes through signal bluetooth output module and sends Bluetooth input interface on mobile terminal, is transferred to mobile terminal CPU, is processed, is counted using the computing function of mobile terminal CPU Calculation obtains real-time atmosphere particle concentration data, is shown by APP software module afterwards.As shown in fig. 7, in embodiment 4 It is mounted with to measure mobile terminal side view and the rearview of atmosphere particle concentration device.

Claims (9)

1. a kind of device measuring atmosphere particle concentration for mobile terminal, described mobile terminal carries photographic head and flash of light Lamp is it is characterised in that described device includes particulate matter detection module and operation APP software module on mobile terminals;Described Particulate matter detection module includes optical filter, light intensity detector, photoelectric signal conversion device, signal of change processing module;
Described flash lamp emits beam and produces scattered light on the particulate matter inciding in air, optical filter choose needed for wave band the back of the body To scattered 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 the signal of telecommunication, and signal of change processing module carries out processing to the signal of telecommunication changed out, calculates To real-time atmosphere particle concentration data, and shown by APP software module.
2. according to claim 1 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Particulate matter detection module also includes collecting lenses, and collecting lenses are arranged on outside optical filter.
3. according to claim 1 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Optical filter and light intensity detector are enclosed in around mobile terminal camera and flash lamp for ring-type.
4. according to claim 1 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Particulate matter detection module also includes high-pass filtering circuit, and the cut-off frequency of described high-pass filtering circuit is to dodge the flash of light frequency turned off the light Rate.
5. according to claim 1 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Particulate matter detection module includes multiple optical filters and corresponding light intensity detector, and each optical filter chooses dorsad dissipating of different-waveband Penetrate light, each light intensity detector detects the backscattering optical signal that corresponding optical filter is chosen.
6. according to claim 5 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Multiple optical filters and corresponding light intensity detector group are circlewise enclosed in around mobile terminal camera and flash lamp.
7. according to claim 5 measure the device of atmosphere particle concentration it is characterised in that described for mobile terminal Multiple optical filters and corresponding light intensity detector are evenly distributed on around mobile terminal camera and flash lamp.
8. the device for mobile terminal mensure atmosphere particle concentration according to claim 1 is it is characterised in that also wrap Include signal output module, the signal of telecommunication that photoelectric signal conversion device is changed out is sent to mobile terminal by described signal output module Signal input interface.
9. a kind of mobile terminal, with photographic head and flash lamp it is characterised in that described mobile terminal includes claim 1 to 8 Any one of for mobile terminal measure atmosphere particle concentration device.
CN201610860727.6A 2016-09-28 2016-09-28 A kind of device and mobile terminal for mobile terminal measurement atmosphere particle concentration Active CN106483051B (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN111707453A (en) * 2018-07-24 2020-09-25 广州柏曼光电科技有限公司 Light source testing method and system
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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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