CN204165869U - A kind of flash PM2.5 real-time monitoring system - Google Patents
A kind of flash PM2.5 real-time monitoring system Download PDFInfo
- Publication number
- CN204165869U CN204165869U CN201420417657.3U CN201420417657U CN204165869U CN 204165869 U CN204165869 U CN 204165869U CN 201420417657 U CN201420417657 U CN 201420417657U CN 204165869 U CN204165869 U CN 204165869U
- Authority
- CN
- China
- Prior art keywords
- real
- flash
- monitoring system
- time monitoring
- acquisition module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model discloses a kind of flash PM2.5 real-time monitoring system, a kind of flash PM2.5 real-time monitoring system, comprises linear power supply and the sensor assembly be connected successively, data acquisition module and host computer; Described linear power supply is connected with sensor assembly, data acquisition module respectively; The utility model can detect the content of particulates in real time, logarithm factually time transform, and upload to upper function and accurately read data, real-time release of finally networking, for the life of people is provided convenience.
Description
Technical field
The utility model relates to a kind of monitoring system of air quality, and concrete is a kind of flash PM2.5 real-time monitoring system.
Background technology
PM2.5 and fine particle.Can the long period be suspended in air, content concn be higher in atmosphere for it, just represents air pollution more serious, and the fine particle of high concentration has very large harm to human body.Also important impact is had on air quality and visibility etc.PM2.5 particle diameter is little, and area is large, active strong, easily attaches poisonous and harmful substances (such as, heavy metal, microorganism etc.), and residence time is in an atmosphere long, fed distance is far away, thus very large on the impact of health and atmosphere quality.
Society is more and more stronger to the consciousness of environmental protection, and it is also more and more urgent that the common people pursue good days quality.Haze has caused showing great attention to of society in recent years, and people also pay attention to more to PM2.5 index, and many people is because environmental problem, air quality and select residence.
The product of current domestic detection PM2.5 is less, and existing PM2.5 detector can only detect certain several material specific, and can only be presented on this instrument by its data message detected, and has certain limitation.
Summary of the invention
The technical matters that the utility model solves there is provided a kind of flash PM2.5 real-time monitoring system, can detect the content of particulates in real time.
The technical solution of the utility model is: a kind of flash PM2.5 real-time monitoring system, comprises linear power supply and the sensor assembly be connected successively, data acquisition module; Described linear power supply is connected with sensor assembly, data acquisition module respectively.
Also comprise host computer, described host computer is connected with data acquisition module.
Described data acquisition module comprises the A/D convertor circuit, CPLD device and the communication unit that connect successively.
Described A/D convertor circuit comprises AK5393 modulus conversion chip.
EPM1270T144 type selected by described CPLD device.
Described communication unit comprises PL2303 and MiniUSB chip.
Described linear power supply comprises the transformer, rectifier, the one-level mu balanced circuit that connect successively, secondary mu balanced circuit;
Described one-level mu balanced circuit comprises LM317 type voltage stabilizing chip, filter capacitor C1, electric capacity C3, resistance R1, adjustable resistance R2.
Described secondary mu balanced circuit comprises LM317 type voltage stabilizing chip, filter capacitor C2, electric capacity C3, resistance R43, adjustable resistance R3.
Described sensor assembly comprises the PM2.5 sensor of GP2Y1010AU0FP model.
The beneficial effects of the utility model are:
1, adopt linear stabilized power supply, design two extremely adjustable voltage stabilizing linear power supplies, can provide voltage stabilization, the little power supply of ripple is to system power supply;
2, data collecting card selects 24 high precision analogue conversion chips, reduces systematic error, improves measuring accuracy;
3, measurement result can show by host computer in real time, and measurement result is released by network.
Accompanying drawing explanation
Fig. 1: the PM2.5 monitoring system structured flowchart being the utility model design;
Fig. 2: be the utility model linear stabilized power supply anode design concept figure;
Fig. 3: be flash PM2.5 sensor internal schematic diagram of the present utility model;
Fig. 4: the smoke signal figure being the PM2.5 monitoring system collection that the utility model is implemented.
Embodiment:
Below in conjunction with accompanying drawing, further detailed description is done to the present invention.
Fig. 1 is the PM2.5 monitoring system structured flowchart of the utility model design, and it forms primarily of following components: linear power supply, sensor assembly, data acquisition module and host computer.
(1), power module
Measurement due to PM2.5 is high-precision detection, selects stable power supply to be very necessary.
As Fig. 2, this detection system adopts the linear power supply of designed, designed to be that data acquisition module and sensor assembly are powered.
Linear power supply first alternating current is reduced voltage magnitude through transformer, then after rectifier circuit rectifies, obtain pulse direct current, obtains the DC voltage with small ripple voltage by filtering.Reach high-precision DC voltage, have to pass through mu balanced circuit and carry out voltage stabilizing.
Stabilized voltage supply designed by this system is input as 220V alternating voltage, exports as ± 12V and+5V High-accuracy direct current voltage.Voltage stabilizing chip selects LM317 and LM337.LM317 is adjustable 3 proper Voltagre regulators, can provide the electric current more than 1.5A when output voltage range 1.2V to 37V.LM337 is adjustable 3 end negative voltage voltage stabilizers, can provide the electric current more than 1.5A when output voltage range-1.2V to-37V, and this this two kinds of voltage stabilizers are highly susceptible to using.
The voltage of this voltage stabilizing chip exports and is:
The utility model utilizes the principle of linear stabilized power supply, designs the adjustable linear stabilized power supply of secondary.
Linear power source circuit figure as shown in Figure 2.220V, 50HZ alternating current, 220V AC conversion is 24V alternating current by access transformer.Be connected with rectifier through the two ends of transformer, "+" of rectifier exports access one-level mu balanced circuit, and "-" exports and be connected with ground wire.Described one-level mu balanced circuit comprises voltage stabilizing chip LM317, filter capacitor C1, resistance R1, adjustable resistance R2.Filter capacitor C1 is directly linked into voltage stabilizing chip LM317 input port, carries out filtering to the voltage signal of input.Resistance R1 is connected on Centronics port and the output port of voltage stabilizing chip LM317.Adjustable resistance R2 one end is connected with LM317 intermediate ends, other end ground connection.
Output through one-level mu balanced circuit accesses secondary mu balanced circuit again.Described secondary mu balanced circuit comprises voltage stabilizing chip LM317, filter capacitor C2 and C3, resistance R4, adjustable resistance R3.Filter capacitor C2 is directly linked into voltage stabilizing chip LM317 input port, carries out filtering to the output voltage signal of one-level mu balanced circuit.Resistance R4 is connected on Centronics port and the output port of voltage stabilizing chip LM317.Adjustable resistance R3 one end is connected with LM317 intermediate ends, other end ground connection.Filter capacitor C3 connects the output port of LM317, carries out filtering to last output voltage.
Of the present utility model two extremely adjustable linear stabilized power supplies, can pass through R2 coarse adjustment, R1 fine tuning, obtain wanting required magnitude of voltage.
The magnitude of voltage that of the present utility model two extremely adjustable linear stabilized power supplies export is highly stable, and Wen Bo is very little, is easy to regulate.
(2), sensor assembly
Selected by PM2.5 sensor, model is GP2Y1010AU0F, and this is a flash dust concentration detecting sensor.The infraluminescence pipe of the paired pin distribution of this sensor internal and phototransistor, utilize photosensitive principle to carry out work.For detecting particle trickle especially.As cigarette particle, fine dust.The height exporting pulse is relied on to judge the concentration of particle.
Center sensor has a hole, air can be allowed freely to flow through, directional transmissions LED light, forms flash of light, is judged the content of dust by the light after the refraction of detection dust in air.
According to the designing requirement of PM2.5 sensor, export a narrow pulse signal by the I/O port of the CPLD device of data acquisition module, recurrence interval 10 ± 1ms, pulse width 0.32 ± 0.02ms, operating voltage 5 ± 0.5V,
By the Current amplifier of triode by this signal, give the LED port of sensor.The delivery outlet of sensor is guided on data collecting card and is carried out corresponding data conditioning and conversion.
(3), data acquisition module
Data acquisition module is the nucleus module of whole hardware system, can logarithm factually time transform, and upload to host computer.Mainly comprise CPLD device, A/D convertor circuit, A/D convertor circuit completes analog to digital conversion, and CPLD completes the pumping signal of data serioparallel exchange and interrupt management and generation sensor.
A/D convertor circuit selects AK5393, and this is a 24 high-precision modulus conversion chips.The simulating signal dress exported by sensor turns to digital signal, passes to CPLD.
CPLD selects EPM1270T144.After CPLD receives the output signal of A/D chip, the serial signal obtained being converted into parallel signal has communication unit to carry out data transmission.
Communication unit adopts the mode of serial communication, selects PL2303 and MiniUSB chip.PL2303 is the integrated RS232-USB interface convertor of a kind of height, can provide the solution that a RS232 full duplex asynchronous serial communication device and USB functional interface facility are connected.
(4), host computer
Upper function accurately reads data, and processes data further, and the content of display particulates, generates air quality report, parallel-connection network real-time release.
Host computer is connected with data collecting card by USB data line, after correct serial port setting (comprising serial ports, baud rate etc.), the data collected are sent to host computer by data acquisition module, and host computer completes the storage of data after the data receiving data acquisition module transmission.Data are carried out storage and on the one hand can be carried out data query, carry out the visual of data on the other hand, can data of description is real-time more intuitively change.Utilize available data analysis software to data analysis, such as, can analyze PM2.5 mean concentration etc.Can generate analysis report to after data analysis, we wish the real time data that can will monitor to be distributed to specific crowd by the form of mail usually.
Fig. 3 is flash PM2.5 sensor internal principle of the present utility model, comprises 1. V-LED interface, 2. LED-GND interface, 3. LED interface, 4. S-GND interface, 5. Vo interface, 6. Vcc interface.Export a pulse signal by the I/O port of the CPLD device of data acquisition module, by the Current amplifier of triode by this signal, send the 3. LED port of sensor assembly to.This pulse signal should meet recurrence interval 10 ± 1ms, pulse width 0.32 ± 0.02ms, operating voltage 5 ± 0.5V.
The delivery outlet of sensor assembly 5. Vo is guided on data acquisition module, carries out corresponding data conditioning and conversion by data acquisition module.
Fig. 4 is the smoke signal figure of the PM2.5 monitoring system collection that the utility model is implemented.When the cigarette lighted being placed on the below of sensor, detection signal immediately rises to 300mg/m2, and when smog dissipates time, the signal detected also slowly reduces.Again be placed in below sensor by cigarette, signal reaches about 300mg/m2 again, and after taking away cigarette, detection signal reduces gradually.
Claims (7)
1. a flash PM2.5 real-time monitoring system, is characterized in that: comprise linear power supply and the sensor assembly be connected successively, data acquisition module; Described linear power supply is connected with sensor assembly, data acquisition module respectively; Also comprise host computer, described host computer is connected with data acquisition module; Described data acquisition module comprises the A/D convertor circuit, CPLD device and the communication unit that connect successively; Described linear power supply comprises the transformer, rectifier, the one-level mu balanced circuit that connect successively, secondary mu balanced circuit.
2. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: described A/D convertor circuit comprises AK5393 modulus conversion chip.
3. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: EPM1270T144 type selected by described CPLD device.
4. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: described communication unit comprises PL2303 and MiniUSB chip.
5. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: described one-level mu balanced circuit comprises LM317 type voltage stabilizing chip, filter capacitor C1, electric capacity C3, resistance R1, adjustable resistance R2.
6. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: described secondary mu balanced circuit comprises LM317 type voltage stabilizing chip, filter capacitor C2, electric capacity C3, resistance R43, adjustable resistance R3.
7. a kind of flash PM2.5 real-time monitoring system according to claim 1, is characterized in that: described sensor assembly comprises the PM2.5 sensor of GP2Y1010AU0FP model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417657.3U CN204165869U (en) | 2014-07-25 | 2014-07-25 | A kind of flash PM2.5 real-time monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417657.3U CN204165869U (en) | 2014-07-25 | 2014-07-25 | A kind of flash PM2.5 real-time monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204165869U true CN204165869U (en) | 2015-02-18 |
Family
ID=52539547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420417657.3U Expired - Fee Related CN204165869U (en) | 2014-07-25 | 2014-07-25 | A kind of flash PM2.5 real-time monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204165869U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198334A (en) * | 2016-07-19 | 2016-12-07 | 丁云广 | A kind of circuit design of air quality detector |
-
2014
- 2014-07-25 CN CN201420417657.3U patent/CN204165869U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198334A (en) * | 2016-07-19 | 2016-12-07 | 丁云广 | A kind of circuit design of air quality detector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106199204A (en) | A kind of electrical conductivity of solution measuring instruments based on microcontroller | |
| CN204789299U (en) | Portable plant photosynthesis analysis case | |
| CN201740813U (en) | Electric energy metering and monitoring meter | |
| CN104849190A (en) | Particulate matter concentration sensor based on true root-mean-square detection | |
| CN205333845U (en) | Online error testing arrangement of electric energy meter | |
| CN205719878U (en) | Portable multi-function laser dust gauge | |
| CN207147551U (en) | A kind of atmospheric dust monitoring and dust suppression system based on LoRa | |
| CN204165869U (en) | A kind of flash PM2.5 real-time monitoring system | |
| CN204142613U (en) | A kind of high precision small dust sensor | |
| CN202102046U (en) | Harmonic monitor capable of displaying harmonic flow direction | |
| CN106066443B (en) | A kind of sample circuit of safety ground detector and safety ground detector | |
| CN104977281A (en) | High-precision online fluorescence detector and detection method thereof | |
| CN101974418A (en) | Miniature personal microbial air sampler | |
| CN204008812U (en) | A kind of current-leaking measuring device | |
| CN202177563U (en) | Device adopting laser scattering method to measure distribution of particles in air | |
| CN206945867U (en) | A kind of line loss real time monitoring apparatus | |
| CN105675517A (en) | Portable equipment for rapid water quality detection and detection method | |
| CN203376033U (en) | Portable on-line detector used for detecting gas meter | |
| CN206162654U (en) | Photovoltaic power plant subassembly environment power prediction system | |
| CN210951906U (en) | Intelligent water purifying water heater control system | |
| CN206208813U (en) | The humidity measuring instrument power supply adaptor that a kind of simple type is powered | |
| CN202404002U (en) | Microcomputer digital dust testing device | |
| CN213364642U (en) | Chicken farm ammonia detecting system | |
| CN203606258U (en) | Simple tester for particulate matter (PM)2.5 content in air | |
| CN203849195U (en) | Indoor CO concentration detection instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20150725 |
|
| EXPY | Termination of patent right or utility model |