CN108982313A - A kind of distributed PM2.5 concentration detection system and method online - Google Patents
A kind of distributed PM2.5 concentration detection system and method online Download PDFInfo
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- CN108982313A CN108982313A CN201810813936.4A CN201810813936A CN108982313A CN 108982313 A CN108982313 A CN 108982313A CN 201810813936 A CN201810813936 A CN 201810813936A CN 108982313 A CN108982313 A CN 108982313A
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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
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention discloses a kind of distributed online PM2.5 concentration detection system and method, method of the invention improves detection accuracy, promotes detection quality by extracting to data investigation, offset；After data after improving precision carry out PC control cell processing, data can be analyzed and be stored, and generate report, convenient for users to pollution condition is understood more intuitively；The present invention separates PM2.5 dust sensor and data summarization unit, has high networking freedom degree and convenience.
Description
Technical field
The invention belongs to PM2.5 Concentration Testing fields, and in particular to a kind of distributed online PM2.5 concentration detection system and
Method.
Background technique
At home before extensive concern PM2.5, PM2.5 is only referred in professional research field by people, is not caused common
The concern of the public.Currently, PM2.5 is mainly measured and issued by the officials such as weather bureau unit, publication interval of events is longer, also not
The practical PM2.5 that each some areas can be embodied well is horizontal.Although part of the manufacturer has been directed to PM2.5 and has developed related production
Product, such as indoor air cleaner, the products such as vehicular air purifier.But the price of these products is all more expensive, and real
It is not high with property.It is still relatively slower to the measurement development of PM2.5.Since China is for the phase of PM2.5 pollution detection equipment technology
It closes research to start late, testing equipment almost all needs import, and the detection device of independent development does not carry out practical volume production also
Test and the research with network integration, therefore domestic testing equipment is unable to satisfy the needs of the large-scale networked laying of country.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of distributed online PM2.5 concentration detection system and sides
Method can be convenient the information for quickly obtaining PM2.5 concentration in certain space, and people is facilitated to be given birth to according to these information to production
It is living to make reasonable planning and achieve the purpose that reduce pollution save the cost.
In order to achieve the above object, a kind of distributed online PM2.5 concentration detection method, comprising the following steps:
Particulate matter detection unit, particulate matter detection unit continuous collecting PM2.5 is arranged in step 1 at required acquisition position
Concentration, and be sent in data summarization unit nearest in zigbee network as dust data；
Step 2, data summarization unit judge whether data reach the requirement of sampling precision, if reaching, by the ash of acquisition
Dirt data are sent in PC control unit as data D, execute step 4；If being not up to, persistently sample, executes step
Rapid three；
Step 3 extracts continuous 22pA data are overlapped, and obtain the data that a units is R+2p, and wherein R is original
Sensor sample precision moves right the data that digit is R+2p p, completes to extract, and obtains the data that precision is R+p
Data D is sent to PC control unit by D, data summarization unit；
Step 4, PC control unit analysis controlling unit reprocess the data D that data summarization unit is sent
And storage, the PM2.5 concentration model in pickup area is constructed, feeds back to user, and by user to the finger of particulate matter detection unit
Order is handed down to data summarization unit and is forwarded.
R+p data D carry out low-pass filtering, after keeping peak value smooth, retransmit to host computer control unit.
Particulate matter detection unit sent data in data summarization unit by zigbee communication module carry out processing and
The control instruction for summarizing, and issuing from data summarization unit reception PC control unit, execution work and dormant state are cut
It changes.
Data D is sent in PC control unit by data summarization unit by 4G module, and from PC control list
Member receives the instruction that be handed down to particulate matter detection unit, is transmitted to corresponding particulate matter detection unit.
A kind of distributed online PM2.5 concentration detection system, including several particulate matter detection units and data summarization unit,
All particulates detection unit passes through zigbee communication module connection data summarization unit, and all data summarization units are logical
Cross 4G module connection PC control unit；
Particulate matter detection unit is for the PM2.5 concentration in pickup area；
Data summarization unit is sent out for the data that particulate matter detection unit uploads to be handled and summarized by 4G module
It send to host computer control unit, and receives the instruction that PC control unit is handed down to particulate matter detection unit, be transmitted to corresponding
Particulate matter detection unit；
The position the R+p data D that data summarization unit is handled first carries out low-pass filtering, after keeping peak value smooth, retransmit to
PC control unit.
PC control unit is reprocessed and is stored for the processing that data summarization unit is sent to be summarized data, and
Construct the PM2.5 concentration model in pickup area.
Particulate matter detection unit includes PM2.5 for detecting PM2.5 concentration and dust sensor and is used for and data are converged
The zigbee communication module of total unit communication.
Data summarization unit includes the STM32 processor for data processing, and the connection of STM32 processor is used for and PM2.5
The zigbee communication module of dust sensed communication, and for the 4G module with PC control unit communication.
Compared with prior art, method of the invention is completed to improve precision, the party by extracting data investigation, offset
Precision can be improved p by method, promote detection quality；After data after improving precision carry out PC control cell processing, energy
Enough analyze data stores, and generates report, convenient for users to pollution condition is understood more intuitively；The present invention is by PM2.5
Dust sensor and data summarization unit separation, have high networking freedom degree and convenience.
The device of the invention by zigbee communication module and 4G module by particulate matter detection unit, data summarization unit and
PC control unit is connected, and partial size is greater than 2.5 μm of particulate matter by the PM2.5 dust sensor of particulate matter detection unit
Concentration is converted into electric signal, is sent to the PM2.5 concentration data acquired in real time in network recently by zigbee communication module
Data summarization unit.The data that each particulate matter detection unit is sent are summarized and are processed by data summarization unit, will be passed through
It handles the data summarized and PC control unit is sent to by 4G module.PC control unit collects each data summarization list
The data that member summarizes form the model to PM2.5 concentration distribution in certain space, generate report.It is mentioned for the production and living of user
For the reference in terms of air pollution.
Detailed description of the invention
Fig. 1 is system block diagram of the invention；
Fig. 2 is control block diagram of the invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
The present invention can be achieved the space PM2.5 real-time detection analysis in production and living and save production to reduce air pollution
Living cost provides reference.
Referring to Fig. 1, distributed online PM2.5 concentration detection system, including particulate matter detection unit, data summarization unit,
PC control unit.Wherein, particulate matter detection unit includes PM2.5 dust sensor；PM2.5 dust sensor is to particle
Object concentration is detected, and the PM2.5 concentration data acquired in real time is sent to data summarization list by zigbee communication module
Member, data summarization unit improve sampling precision using over-sampling and low-pass filtering, and will treated that data summarize is whole
Reason, the analytical unit of PC control unit is sent to by 4G module, and the analytical unit of PC control unit converges data
The data of total unit are reprocessed and are stored, and construct the PM2.5 concentration model in certain area, and control command is sent
To data summarization unit.
Particulate matter detection unit includes PM2.5 dust sensor and zigbee communication module.Data summarization unit included
Sampling, gaussian filtering computing module, zigbee communication module, data summarization processing module and 4G wireless communication module.Host computer
Control unit includes network communication module, control and display module, and data store read module, data analysis and model construction
Module.Input module includes the input of particulate matter detection unit working condition, the input of data summarization unit working condition.Data are read
It takes and is inputted with display methods.
Referring to fig. 2, the particulate matter detection unit that different location is distributed in when work passes through PM2.5 dust sensor pair
PM2.5 concentration real time data carries out detection collection, samples to input signal, is sent to number by zigbee communication module
According to summarizing module, the PM2.5 concentration real-time data memory of receiving is air quality PM2.5 concentration data by data summarization module
Collection.Then the data of storage are extracted, due to will receive in sampling noise that core from thermal noise, CPU generates,
The influence of the noises such as noise caused by I/O port switching bring noise, power source change, can be reached by these noises makes
With the purpose of extraction technique.Due to the presence of noise, the data that ADC can be made to obtain generate the variation of 1-2LSB.In this way
Variation, available raising sampling precision after calculating.By continuous acquisition to data be overlapped, extract 22pA data carry out
Superposition obtains the data that a units is R+2p, this data is moved right p, extraction is just completed, having obtained precision is
R+p data D.After extracting in this way, the data bits of acquisition increases, and corresponding resolution ratio also improves.Noise frequency also with
Raising.The data being superimposed in this way pass through low-pass filtering again, and a window is arranged, by multiple R+p of acquisition
For data by low-pass filtering, attenuated signal wave noise keeps peak value smooth, but also results in slight delay.Due to this dress
Set be one not high to requirement of real-time and to the system that precision requires, therefore such delay is acceptable.Extremely
This, just completes the detection of particle concentration, and data summarization unit can summarize collected PM2.5 concentration data later
It arranges, data is sent to host computer control unit by 4G module.PC control unit reads each data summarization by network
The data that unit summarizes carry out analytical calculation to the data of variable grain analyte detection unit, construct the PM2.5 in certain area
Concentration trends model.Guidance is provided for production and living, people is facilitated to make reasonable planning to production and living according to these information
Achieve the purpose that reduce pollution save the cost.And it is issued according to user's input to particulate matter detection unit and data summarization unit
Control instruction.
Distributed online PM2.5 concentration detection system, it can be achieved that the space PM2.5 real-time detection in production and living is analyzed,
To reduce air pollution, saves production and living cost and reference is provided.System reliability is high, and real-time has good stability.
Claims (7)
1. a kind of distributed online PM2.5 concentration detection method, which comprises the following steps:
Step 1, is arranged particulate matter detection unit at required acquisition position, and particulate matter detection unit continuous collecting PM2.5 is dense
Degree, and be sent in data summarization unit as dust data；
Step 2, data summarization unit judge whether data reach the requirement of sampling precision, if reaching, by the dust number of acquisition
It is sent in PC control unit according to as data D, executes step 4；If being not up to, persistently sample, executes step 3；
Step 3 extracts continuous 22pA data are overlapped, and obtain the data that a units is R+2p, and wherein R is original PM2.5
Dust sensor sampling precision moves right the data that digit is R+2p p, completes to extract, and obtains the number that precision is R+p
According to D, data D is sent in PC control unit by data summarization unit；
Step 4, the analytical unit in PC control unit are reprocessed and are deposited to the data D that data summarization unit is sent
Storage, the PM2.5 concentration model feedback constructed in pickup area issue the instruction of particulate matter detection unit to user, and by user
It is forwarded to data summarization unit.
2. a kind of distributed online PM2.5 concentration detection method according to claim 1, which is characterized in that R+p numbers
Low-pass filtering is carried out according to D, after keeping peak value smooth, is retransmited to host computer control unit.
3. a kind of distributed online PM2.5 concentration detection method according to claim 1, which is characterized in that particle quality testing
It surveys unit to send data in data summarization unit by zigbee communication module and is handled and summarized, and from data summarization
Unit receives the control instruction that PC control unit issues, and executes the switching of work and dormant state.
4. a kind of distributed online PM2.5 concentration detection method according to claim 1, which is characterized in that data summarization
Data D is sent in PC control unit by unit by 4G module, and to be handed down to from the reception of PC control unit
The instruction of grain analyte detection unit, is transmitted to corresponding particulate matter detection unit.
5. the system that a kind of distributed online PM2.5 concentration detection method described in claim 1 uses, which is characterized in that packet
Several particulate matter detection units and data summarization unit are included, all particulates detection unit passes through zigbee communication module and connects
Data summarization unit, all data summarization units pass through 4G module connection PC control unit；
Particulate matter detection unit is for the PM2.5 concentration in pickup area；
Data summarization unit is used to carry out the data of acquisition to improve the processing of sampling precision, and sends supreme position machine control unit
In；
PC control unit constructs pickup area for the data that data summarization unit is sent to be reprocessed and stored
Interior PM2.5 concentration model.
6. a kind of system that distributed online PM2.5 concentration detection method uses described in claim 5, which is characterized in that
Grain analyte detection unit includes PM2.5 dust sensor for detecting PM2.5 concentration and for communicating with data summarization unit
Zigbee communication module.
7. a kind of system that distributed online PM2.5 concentration detection method uses described in claim 5, which is characterized in that number
According to the STM32 processor that collection unit includes for data processing, the connection of STM32 processor is for logical with PM2.5 dust sensing
The zigbee communication module of letter, and for the 4G module with PC control unit communication.
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| CN201810813936.4A CN108982313A (en) | 2018-07-23 | 2018-07-23 | A kind of distributed PM2.5 concentration detection system and method online |
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| JP2016223907A (en) * | 2015-05-29 | 2016-12-28 | 富士通株式会社 | Measurement device and measurement system |
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| CN206756649U (en) * | 2017-04-13 | 2017-12-15 | 常州机电职业技术学院 | A kind of mining area air environmental pollution source traceability system |
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| CN102121894A (en) * | 2010-12-10 | 2011-07-13 | 苏州科技学院 | High-flow industrial dust distributed rapid measurement system |
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| CN202793980U (en) * | 2012-08-27 | 2013-03-13 | 陕西理工学院 | Distributed wireless dust measuring instrument |
| JP2016223907A (en) * | 2015-05-29 | 2016-12-28 | 富士通株式会社 | Measurement device and measurement system |
| CN205229000U (en) * | 2015-12-21 | 2016-05-11 | 河南龙宇信息技术有限公司 | City haze monitoring system based on GPRS |
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