CN202177563U - Device adopting laser scattering method to measure distribution of particles in air - Google Patents
Device adopting laser scattering method to measure distribution of particles in air Download PDFInfo
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- CN202177563U CN202177563U CN 201120299380 CN201120299380U CN202177563U CN 202177563 U CN202177563 U CN 202177563U CN 201120299380 CN201120299380 CN 201120299380 CN 201120299380 U CN201120299380 U CN 201120299380U CN 202177563 U CN202177563 U CN 202177563U
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Abstract
A device adopting the laser scattering method to measure distribution of particles in air is characterized by comprising an air pump with both a measurement cavity and an air conduit, a laser arranged on one side in the measurement cavity at the outlet of the air conduit, a light trap region arranged on the other side in the measurement cavity at the outlet of the air conduit, a photoelectric detection sensor arranged on one side in the measurement cavity at the outlet of the air conduit and provided with focusing lenses, a microcomputer control device connected with the electrical signal output of the photoelectric detection sensor, and a display screen, wherein the electrical signal input of the display screen is connected with the electrical signal output of the microcomputer control device; and the photoelectric detection sensor is a high-sensitivity avalanche diode. Compared with the prior art, the device provided by the utility model is practical and available, achieves long-term real-time measurement and direct acquisition of measurement results, serves the functions of data storage, data output, automatic measurement, alarm and the like, and has the advantages of small size, light weight, simplicity and convenience in operation, and high stability and reliability.
Description
Technical field
The utility model relates to a kind of air particles apparatus for measuring distribution.
Background technology
Along with fast development of national economy, dust pollution is more and more serious.China's atmosphere is coal-smoke pollution at present, and the overall suspended pellet in many urban airs (TSP) is high for a long time, and the air quality standard of being given with the World Health Organization (WHO) differs greatly.Dust is very harmful to the mankind, and especially small size particle because small size particle can float in atmosphere for a long time, is difficult to be deposited to ground, be prone to get into the human respiratory tract, and particle diameter is more little, and the sedimentation position in the human respiratory tract is dark more, and harm is just big more.Therefore the measurement of dust concentration has crucial meaning in field of environment protection, is the problem that presses for solution.
Dust is airborne suspended particulate substance, and its size is in 0.01～20um scope.Environmental Protection Department goalkeeper aerodynamics equivalent diameter is called visible dust greater than the suspended particle of 10um, and they are the meeting rapid subsidence in still air; The aerodynamics equivalent diameter is called pellet smaller or equal to the suspended particle of 10um; The aerodynamics equivalent diameter is called the respiratory particle smaller or equal to the particle of 7.07 um.
The method of measuring dust concentration at present roughly has following two types:
Method based on sampling is measured (like the filter membrane weight method) and is measured (like light scattering method) based on the method for non-sampling.Though measure enforcement easily based on the method for sampling,, be not easy in theory to measure in real time; Adopt light scattering principle to carry out powder concentration measurement; This measuring method can real-time online measuring in theory, directly obtains measurement result, and can realize functions such as data storage, data output, measurement automatically, communication; Volume is little, in light weight, easy and simple to handle, stability is high, reliability is high also is the obvious advantage of this quasi-instrument; But, up to the present, also do not have a kind of reliable, practical utility device to use above-mentioned principle.
Summary of the invention
The goal of the invention of the utility model be to provide a kind of reality available, can measure in real time, directly obtain measurement result, and can realize that functions such as data storage, data output, measurements automatically, warning, volume are little, in light weight, easy and simple to handle, stability height, laser scattering method air particles apparatus for measuring distribution that reliability is high.
The laser scattering method air particles apparatus for measuring distribution of the utility model is to realize like this; Comprise opposite side in the measurement chamber that has air pump, the laser instrument that is arranged on measurement chamber one side of air duct outlet of measuring chamber and air duct, is arranged on the air duct outlet sunken light district, be arranged on band Jiao of a side in the measurement chamber that air duct exports to the photodetection sensor of focus lens, export micro-computer controlling apparatus, the display screen that links to each other with the electric signal of photodetection sensor; Display screen electric signal input link to each other photodetection sensor employing high sensitivity avalanche diode with the electric signal output of micro-computer controlling apparatus.During work, booster air pump, outside air one constant flow velocity passes through to measure the chamber air duct; Laser forms a diameter in the zone that airflow is crossed after lens focus be micron-sized light sensitive area, and dust flows through when light sensitive area, and scattering can take place, and the particle of dust is big more; The light intensity of scattering is big more, and the photodetection sensor detects this scattered light immediately and converts pulsed electronic signal to, and this pulse signal is corresponding to the size of particle; The scattered light light intensity is big more, and pulsed electronic signal is strong more, and grain diameter is big more; Through calculating the quantity and the power of the pulsed electronic signal in the setting-up time, just can obtain the content and the grain size data of airborne dust, through obtaining the particle diameter distributed number of dust particle in the air after the processing of circuit; And these data are real-time data.
Here, micro-computer controlling apparatus comprises electric signal filter amplification circuit, signal acquisition circuit, microprocessor.The electric signal output of photodetection sensor links to each other with filter amplification circuit, and the electric signal of signal acquisition circuit is imported and linked to each other with the electric signal input of microprocessor.Adopt electric signal filter amplification circuit, signal acquisition circuit, can guarantee the stable interference that removes extraneous electric wave side by side of signal effectively.
The utility model compared with present technology, have reality available, can measure, directly obtain measurement result for a long time in real time, and can realize functions such as data storage, data output, measurement automatically, warning, little, in light weight, easy and simple to handle, the stable height of volume, the advantage that reliability is high.
Description of drawings:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of laser instrument, photodetection Sensor section;
Fig. 3 is electric signal filter amplification circuit figure;
Fig. 4 is microcontroller circuit figure;
Fig. 5 is the data acquisition schematic diagram;
Fig. 6 is for adopting the distribution plan of the dust that the utility model detected.
Embodiment:
Combine accompanying drawing and embodiment that the utility model is done describes in further detail at present:
The laser scattering method air particles apparatus for measuring distribution of the utility model is to realize like this; Comprise sides in the measurement chamber 12 that has the air pump 2 of measuring chamber 12 and air duct 1, is arranged on air duct 1 outlet the laser instrument that has condenser lens 13 3, be arranged on the opposite side in the measurement chamber 12 of air duct 1 outlet sunken light district 4, be arranged on sides in the measurement chamber 12 of air duct 1 outlet the photodetection sensor 5 that has burnt focusing lens group 14, export micro-computer controlling apparatus 6, the LCDs 7 that links to each other with the electric signal of photodetection sensor 5; Display screen 7 electric signal input link to each other with the electric signal output of micro-computer controlling apparatus 6,5 employings of photodetection sensor be the high sensitivity avalanche diode.
Micro-computer controlling apparatus 6 comprises electric signal filter amplification circuit 8, signal acquisition circuit 9, microprocessor 10; The electric signal output of photodetection sensor 5 links to each other with electric signal filter amplification circuit 8; The electric signal input of signal acquisition circuit 9 links to each other with the electric signal output of electric signal filter amplification circuit 8, and the electric signal output of signal acquisition circuit 9 links to each other with the electric signal input of microprocessor 10.
Claims (2)
1. laser scattering method air particles apparatus for measuring distribution; It is characterized in that comprising opposite side in the measurement chamber that has air pump, the laser instrument that is arranged on measurement chamber one side of air duct outlet of measuring chamber and air duct, is arranged on the air duct outlet sunken light district, be arranged on band Jiao of a side in the measurement chamber that air duct exports to the photodetection sensor of focus lens, export micro-computer controlling apparatus, the display screen that links to each other with the electric signal of photodetection sensor; Display screen electric signal input link to each other photodetection sensor employing high sensitivity avalanche diode with the electric signal output of micro-computer controlling apparatus.
2. laser scattering method air particles apparatus for measuring distribution according to claim 1; It is characterized in that micro-computer controlling apparatus comprises electric signal filter amplification circuit, signal acquisition circuit, microprocessor; The electric signal output of photodetection sensor links to each other with the electric signal filter amplification circuit; The electric signal input of signal acquisition circuit links to each other with the electric signal output of electric signal filter amplification circuit, and the electric signal output of signal acquisition circuit links to each other with the electric signal input of microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120299380 CN202177563U (en) | 2011-08-17 | 2011-08-17 | Device adopting laser scattering method to measure distribution of particles in air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120299380 CN202177563U (en) | 2011-08-17 | 2011-08-17 | Device adopting laser scattering method to measure distribution of particles in air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202177563U true CN202177563U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120299380 Expired - Fee Related CN202177563U (en) | 2011-08-17 | 2011-08-17 | Device adopting laser scattering method to measure distribution of particles in air |
Country Status (1)
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| CN (1) | CN202177563U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323193A (en) * | 2011-08-17 | 2012-01-18 | 佛山科学技术学院 | Measurement method for air particle distribution through laser light scattering method, and apparatus thereof |
| CN102854109A (en) * | 2012-07-31 | 2013-01-02 | 安徽皖仪科技股份有限公司 | Novel intelligent sensor for measuring dust concentration by using laser backscattering method |
| CN103471972A (en) * | 2013-09-11 | 2013-12-25 | 南京云创存储科技有限公司 | Automatic sampling acquisition system |
| CN107247014A (en) * | 2017-08-15 | 2017-10-13 | 中国人民解放军火箭军工程大学 | The particle size distribution measurement device and method of smoke interfered with infrared in a kind of vacuum |
-
2011
- 2011-08-17 CN CN 201120299380 patent/CN202177563U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323193A (en) * | 2011-08-17 | 2012-01-18 | 佛山科学技术学院 | Measurement method for air particle distribution through laser light scattering method, and apparatus thereof |
| CN102854109A (en) * | 2012-07-31 | 2013-01-02 | 安徽皖仪科技股份有限公司 | Novel intelligent sensor for measuring dust concentration by using laser backscattering method |
| CN103471972A (en) * | 2013-09-11 | 2013-12-25 | 南京云创存储科技有限公司 | Automatic sampling acquisition system |
| CN107247014A (en) * | 2017-08-15 | 2017-10-13 | 中国人民解放军火箭军工程大学 | The particle size distribution measurement device and method of smoke interfered with infrared in a kind of vacuum |
| CN107247014B (en) * | 2017-08-15 | 2020-06-30 | 中国人民解放军火箭军工程大学 | Device and method for measuring particle size distribution of vacuum intermediate infrared interference smoke screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20130817 |