CN104792676B - The method that air nano-scale particle concentration is measured using ionization method - Google Patents
The method that air nano-scale particle concentration is measured using ionization method Download PDFInfo
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- CN104792676B CN104792676B CN201510203727.4A CN201510203727A CN104792676B CN 104792676 B CN104792676 B CN 104792676B CN 201510203727 A CN201510203727 A CN 201510203727A CN 104792676 B CN104792676 B CN 104792676B
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Abstract
The invention discloses it is a kind of using ionization method measure air nano-scale particle concentration method, including：Clean gas flow is output to sensor main body by the device for providing pure air；When air-flow passes through narrow channel, metal needle discharges high pressure by the gas ionization in clean gas flow, so as to form ionized gas；Sample gas, that is, under test gas is sucked injector by generated negative pressure when ionized gas passes through injector；After sample gas is sufficiently mixed with ionized gas in injector, the free charge junction belt electric forming mixed gas in the particle and ionized gas in sample gas；Mixed gas is by an extra electric field, and residual ion is captured by extra electric field in mixed gas, so as to make in the air-flow that mixed gas formed just the charge entrained by the only particle of surplus charging；When the gas that mixed gas is formed flows out sensor, using amperometric measurement electric current so as to obtain particles contained concentration in sample gas.Realize accurate the advantages of measuring Atmospheric particulates.
Description
Technical field
The present invention relates to fields of measurement, and in particular, to a kind of to measure air nano-scale particle concentration using ionization method
Method.
Background technology
At present, in Atmospheric particulates measurement.Want whether rational judgment has particle contamination, it can be by particulate matter from certain volume
Air in separate after, then measure its weight, mainly have 3 kinds of sides at present with regard to its aerial concentration can be calculated
Method：Gravimetric method, trace oscillating balance method and β ray methods but these three methods have the shortcomings that respective：
Gravimetric method although gravimetric method is accurate, can not be monitored automatically.
Trace oscillating balance method：Measuring sample needs to heat the loss for leading to volatility and half volatile substance, causes to survey
Determine Lower result.And this method is not suitable for the measure in the excessively serious area of southern humid area and pollution.
β ray methods：It is then to measure weight by measuring β rays across the attenuation after filter membrane and particulate matter.It occupy two
A hypothesis:First, sampling membrane band is uniform, second is that the particle physics characteristic collected is uniform.But above-mentioned two is assumed often
And it is invalid, therefore determination data is generally acknowledged to higher, this detection method is in relative clean and dry regional failure rate
It is low, it is higher in moist high-temperature area failure rate.
Above-mentioned three kinds of method costs of equipment are expensive, and are difficult to manipulate, and the real real-time monitoring of particle can not be done substantially
It arrives, and can not accurately measure the quantity of particulate matter and nano level particulate matter.
Invention content
It is an object of the present invention to it in view of the above-mentioned problems, proposes a kind of dense using ionization method measurement air nano-scale particle
The method of degree, to realize accurate the advantages of measuring Atmospheric particulates.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of method for measuring air nano-scale particle concentration using ionization method includes：
The device that sensor main body is provided to pure air with one is connected, and provides the device of pure air by clean gas flow
The step of being output to sensor main body；
When clean gas flow is by channel narrow in sensor main body, the metal needle being arranged in narrow channel discharges
High pressure is by the gas ionization in clean gas flow, the step of so as to form ionized gas；
Ionized gas subsequently enters the injector of sensor, and generated negative pressure will sample when ionized gas passes through injector
The step of gas, that is, under test gas sucking injector；
After sample gas is sufficiently mixed with ionized gas in injector, in the particle and ionized gas in sample gas
The step of free charge junction belt electric forming mixed gas；
Mixed gas is by an extra electric field, and residual ion is captured by extra electric field in mixed gas, so as to make mixing
The step of charge entrained by the particle of charging is just only remained in the air-flow that gas is formed；
And
When the gas that mixed gas is formed flows out sensor, using amperometric measurement electric current so as to obtain in sample gas
The step of particles contained concentration.
Technical scheme of the present invention has the advantages that：
Technical scheme of the present invention measures air particles degree quality and quantity using ionization method, is adsorbed based on particulate matter
And the principle of charge is carried, the amount of charge entrained by particle under test gas is measured, so as to obtain the quality and quantity of particle.
And nano level particulate matter quantity can be detected.Compared to existing fine particle detection technique, air is measured using ionization method
Granularity quality and quantity uses non-acquired detection method.The accuracy that the characteristic of non-acquired detection may insure to measure avoids
The loss of molecule and long period is caused to use using filter membrane and filter core, so as to reducing maintenance and cleaning.
Below by drawings and examples, technical scheme of the present invention is described in further detail.
Description of the drawings
Fig. 1 is that the Method And Principle that air nano-scale particle concentration is measured using ionization method described in the embodiment of the present invention is illustrated
Figure；
Fig. 2 is the flow chart that air nano-scale particle concentration is measured using ionization method described in the embodiment of the present invention.
Specific embodiment
The preferred embodiment of the present invention is illustrated below in conjunction with attached drawing, it should be understood that preferred reality described herein
It applies example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
As shown in Fig. 2, a kind of method for measuring air nano-scale particle concentration using ionization method includes：
The device that sensor main body is provided to pure air with one is connected, and provides the device of pure air by clean gas flow
It is output to sensor main body；
When clean gas flow is by channel narrow in sensor main body, the metal needle being arranged in narrow channel discharges
High pressure is by the gas ionization in clean gas flow, so as to form ionized gas；
Ionized gas subsequently enters the injector of sensor, and generated negative pressure will sample when ionized gas passes through injector
Gas, that is, under test gas sucking injector；
After sample gas is sufficiently mixed with ionized gas in injector, in the particle and ionized gas in sample gas
Free charge junction belt electric forming mixed gas；
Mixed gas is by an extra electric field, and residual ion is captured by extra electric field in mixed gas, so as to make mixing
The charge entrained by the particle of charging is just only remained in the air-flow that gas is formed；
When the gas that mixed gas is formed flows out sensor, using amperometric measurement electric current so as to obtain in sample gas
The step of particles contained concentration.
Electric current measured by galvanometer just reflects concentration particles contained in sample gas（Quantity/quality）.Its principle
As shown in Figure 1, in Fig. 1.Electrometer, that is, galvanometer.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify to the technical solution recorded in foregoing embodiments or carry out equivalent replacement to which part technical characteristic.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (1)
- A kind of 1. method that air nano-scale particle concentration is measured using ionization method, which is characterized in that including：Nano-scale particle sensor abbreviation sensor, the device that sensor main body is provided to pure air with one are connected, carry The step of clean gas flow is output to sensor main body for the device of pure air；When clean gas flow is by channel narrow in sensor main body, the metal needle being arranged in narrow channel discharges high pressure By the gas ionization in clean gas flow, the step of so as to form ionized gas；Ionized gas subsequently enters the injector of sensor, and generated negative pressure is by sample gas when ionized gas passes through injector I.e. under test gas sucks the step of injector；After sample gas is sufficiently mixed with ionized gas in injector, the freedom in particle and ionized gas in sample gas The step of charge bonded band electric forming mixed gas；Mixed gas is by an extra electric field, and residual ion is captured by extra electric field in mixed gas, so as to make mixed gas The step of charge entrained by the particle of charging is just only remained in the air-flow of formation；AndIt is contained in sample gas so as to obtain using amperometric measurement electric current when the gas that mixed gas is formed flows out sensor The step of particle concentration.
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| CN104792676B true CN104792676B (en) | 2018-07-03 |
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| DE102015016820A1 (en) * | 2015-12-22 | 2017-06-22 | Testo SE & Co. KGaA | Particles measuring arrangement |
| CN108426810A (en) * | 2018-03-16 | 2018-08-21 | 天津大学 | A kind of measuring device of particulate in air mean concentration |
| CN109991137A (en) * | 2019-04-02 | 2019-07-09 | 霸州市地海云天环保科技有限公司 | Small ion collection type monitoring device of powder-like waste based on αsource |
| CN111402540B (en) * | 2020-02-25 | 2021-08-24 | 王勇强 | Air-breathing smoke-sensing fire detection device, method and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101960288A (en) * | 2008-03-04 | 2011-01-26 | 皮卡索尔公司 | Particle measurement process and apparatus |
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| RU2217739C1 (en) * | 2002-10-18 | 2003-11-27 | Кудрявцев Анатолий Анатольевич | Process of gas analysis and ionization detector for its implementation |
| CN100592070C (en) * | 2006-04-25 | 2010-02-24 | 何宗彦 | Method for in-situ detection of aerosol particle concentration and detector thereof |
| US8302460B2 (en) * | 2008-11-03 | 2012-11-06 | Board Of Trustees Of Michigan State University | Mass loading monitor |
| CN101504388A (en) * | 2009-03-16 | 2009-08-12 | 中北大学 | Miniature optical ionization sensor |
| CN102074447A (en) * | 2010-06-30 | 2011-05-25 | 清华大学 | Miniature ionizing gas analyzer, miniature gas ionizing device and manufacturing method thereof |
| US8970840B2 (en) * | 2011-12-09 | 2015-03-03 | The United States of America, as represented by the Secretary of the Department of Health and Human Services, Centers for Disease Control and Prevention | Method and apparatus for aerosol analysis using optical spectroscopy |
| CN103926178A (en) * | 2014-04-30 | 2014-07-16 | 天津圣纳科技有限公司 | Mechanism for classifying inhalable particles and measuring concentration as well as detection method thereof |
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