CN202916165U - Instrument for continually and automatically monitoring atmospheric fine-particulates by adopting Beta ray method - Google Patents
Instrument for continually and automatically monitoring atmospheric fine-particulates by adopting Beta ray method Download PDFInfo
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- CN202916165U CN202916165U CN 201220514526 CN201220514526U CN202916165U CN 202916165 U CN202916165 U CN 202916165U CN 201220514526 CN201220514526 CN 201220514526 CN 201220514526 U CN201220514526 U CN 201220514526U CN 202916165 U CN202916165 U CN 202916165U
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Abstract
The utility model relates to an instrument for continually and automatically monitoring atmospheric fine-particulates by adopting the Beta ray method. The instrument is characterized by comprising a particulate collection device, an external dynamic dew-point control system, a stainless-steel bent pipe, a particulate analysis and measurement module, a pre-calculation temperature sensor, a pre-calculation pressure sensor, a flow control valve, a photoelectric signal discriminator (OPTS) and an embedded microprogrammed control unit (MCU), wherein the particulate collection device is communicated with the external dynamic dew-point control system; the external dynamic dew-point control system is communicated with the stainless-steel bent pipe and the particulate analysis and measurement module; a Beta ray component is vertically mounted at the upper end of the particulate analysis and measurement module, and a scintillator counter is vertically mounted at the lower end of the particulate analysis and measurement module; a filter paper supply device is arranged on one side of the particulate analysis and measurement module, and a filter paper collection device is arranged on the other side; and filter paper is driven by the filter paper supply device and the filter paper collection device to pass through the clearance between the scintillator counter and the Beta ray component. The instrument is low in detection limit and high in precision and can be used for continuous monitoring.
Description
Technical field
The utility model relates to a kind of β rays method airborne fine particulate matter automatic monitor for continuously instrument.
Background technology
Weather scientist and medical expert think, the haze weather that is caused by fine particle is to the harm of health even larger than sandstorm.The particle of particle diameter more than 10 microns can be blocked in outside people's the nose; The particle of particle diameter between 2.5 microns to 10 microns can enter the upper respiratory tract, but part can excrete by sputum etc., also can be stopped by the fine hair of nasal cavity inside in addition, to the human health damage less; And particle diameter is at the fine particle below 2.5 microns, diameter is equivalent to human hair's 1/10 size, is difficult for being blocked, and can directly enter bronchus after being inhaled into human body, disturb the gas exchange of lung, cause the disease that comprises the aspects such as asthma, bronchitis and cardiovascular disease.At present, relevant monitoring instrument great majority are for using method---the classical approach of weighing behind the filter membrane sampling, we also see the monitor that has some β rays methods to measure flue dust, need to solve following problem for the β rays method monitor of airborne fine particulate matter: the transfer efficiency of aerosol particle thing; Gas piping is to the absorption of particle; Use long-life scintillator counter, the geiger's tube before replacing; Can realize continuous monitoring.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, and a kind of β rays method airborne fine particulate matter automatic monitor for continuously instrument is provided, and this instrument detectability is low, and precision is high, but automatic monitor for continuously.
For solving above technical matters, the technical solution of the utility model is: β rays method airborne fine particulate matter automatic monitor for continuously instrument, its difference is: it comprises the particle collector, the external dynamic dew-point control system, stainless steel elbow, particle analysis to measure module, temperature sensor before the meter, pressure transducer before the meter, flow control valve, photosignal discriminator (OPTS), embedded microcontroller system (MCU), the particle collector is communicated with the external dynamic dew-point control system, and the external dynamic dew-point control system is communicated with particle analysis to measure module by stainless steel elbow; Described particle analysis to measure module upper end at right angle setting β ray assembly, the lower end is vertically installed with the scintillator counter, described particle analysis to measure module one side is provided with the filter paper paper feed, an other side is provided with the filter paper delivery device, filter paper is at the filter paper paper feed, between scintillator counter and β ray assembly, pass by under the driving of filter paper delivery device, the particle analysis to measure module on the lower port of giving vent to anger at position is connected to aspiration pump by connecting tube, described giving vent to anger is connected with the front temperature sensor of meter between port and the aspiration pump, pressure transducer before the meter, flow control valve enters embedded microcontroller system (MCU) and calculates output behind the described scintillator counter output signal process photosignal discriminator (OPTS).
Further, crooked 135 ゜ of described stainless steel elbow, inner wall smooth, diameter are 8mm, its bending radius is not less than 3 times of diameter.
Further, described particle collector is comprised of secondary impacting type cutter for particles and cyclone fine particle separator.
Further, described outside gas circuit dynamic dew-point control system (ODH) comprises the gas circuit supervisor, be provided with the silica gel heating sheet among the described gas circuit supervisor, the periphery of silica gel heating sheet is enclosed with heat-insulation layer, in the described heat-insulation layer near the silica gel heating sheet high-accuracy temperature-humidity sensor is installed.
Further, described filter paper delivery device comprises locating wheel, take-up pulley, and described locating wheel is installed on the paper delivery end of particle analysis to measure module, and described take-up pulley is positioned at the outer side-lower of locating wheel of relative page orientation.
Further, described filter paper paper feed comprises escapement, feed wheel, and described escapement is installed on the paper feed end of particle analysis to measure module, and described feed wheel is positioned at the escapement side-lower of relative page orientation.
The contrast prior art, beneficial features of the present utility model is as follows:
1), this β rays method airborne fine particulate matter automatic monitor for continuously instrument, particle analysis to measure device housing upper end at right angle setting β ray assembly, lower end are vertically installed with the scintillator counter, realized the integrated monitoring of gasmetry, compact conformation, at same channel measurement, avoided the paper feed error, shortened measuring period, improve measuring accuracy, really realized the automatic monitor for continuously of Atmospheric particulates;
2), this β rays method airborne fine particulate matter automatic monitor for continuously instrument, adopt stainless steel elbow, eliminated to greatest extent the Adsorption Effect of pipeline to particle, reduced measuring error;
3), this β rays method airborne fine particulate matter automatic monitor for continuously instrument, use the scintillator counter, need not preheating, signal stabilization reaches 10 years serviceable life.
Description of drawings
Fig. 1 is the structural representation of β rays method airborne fine particulate matter automatic monitor for continuously instrument among the utility model embodiment;
Fig. 2 is the photosignal discriminator module frame chart of the utility model embodiment;
Fig. 3 is the particle collector structural representation of the utility model embodiment;
Fig. 4 is the external dynamic dew-point control system structural representation of the utility model embodiment;
Fig. 5 is embedded microcontroller system (MCU) circuit diagram of the utility model embodiment;
Wherein: 1-particle collector, 2-external dynamic dew-point control system, 3-stainless steel elbow, 4-β ray assembly, 5-scintillator counter, 6-locating wheel, 7-take-up pulley, 8-feed wheel, 9-escapement, 10-give vent to anger pressure transducer before temperature sensor before port, the 11-meter, the 12-meter, 13-flow control valve, 14-aspiration pump, 15-photosignal discriminator (OPTS), 16-embedded microcontroller system (MCU).
Embodiment
By reference to the accompanying drawings the utility model is described in further detail below by embodiment.
Please refer to Fig. 1, the utility model embodiment β rays method airborne fine particulate matter automatic monitor for continuously instrument, it comprises particle collector 1, external dynamic dew-point control system 2, stainless steel elbow 3, particle analysis to measure module, temperature sensor 11 before the meter, pressure transducer 12 before the meter, flow control valve 13, photosignal discriminator 15(OPTS), the 16(MCU of embedded microcontroller system), particle collector 1 is communicated with external dynamic dew-point control system 2, and external dynamic dew-point control system 2 is communicated with particle analysis to measure module by stainless steel elbow 3; Described particle analysis to measure module upper end at right angle setting β ray assembly 4, the lower end is vertically installed with scintillator counter 5, described particle analysis to measure module one side is provided with the filter paper paper feed, an other side is provided with the filter paper delivery device, filter paper is at the filter paper paper feed, between scintillator counter 5 and β ray assembly 4, pass by under the driving of filter paper delivery device, the particle analysis to measure module on the lower port 10 of giving vent to anger at position is connected to aspiration pump 14 by connecting tube, described giving vent to anger is connected with the front temperature sensor 11 of meter between port 10 and the aspiration pump 14, pressure transducer 12 before the meter, flow control valve 13, described scintillator counter 5 output signals are through photosignal discriminator 15(OPTS) after enter the 16(MCU of embedded microcontroller system) calculate output.Embodiment of the invention scintillator counter signals exports photosignal discriminator (OPTS) to, through the adjustment of amplitude, eliminates baseline noise, improves signal to noise ratio (S/N ratio), greatly reduces the detection limit of measurement.
Preferably, crooked 135 ゜ of described stainless steel elbow, inner wall smooth, diameter are 8mm, its bending radius is not less than 3 times of diameter.The stainless steel elbow inner wall smooth to prevent tube wall to the absorption of particle, guarantees the transfer efficiency of particle.
Atmosphere separates step by step through the particle collector, filtering is greater than the particle of measuring diameter, make less than the particle of measuring diameter and enter external dynamic dew-point control system (ODH), in ODH, carry out Temperature and Humidity Control, guarantee that the gaseous state composition in the particle is unaffected.Atmospheric particulates enter particle analysis to measure module again, and the shell upper entrance of particle analysis to measure module is equipped with the stainless steel elbow of 135 ゜ bendings of a 3D multiplying power.Gas is from the lower port 10 discharges of giving vent to anger at position of particle analysis to measure module housing, and temperature sensor 11, the front pressure transducer 12 of meter, flow control valve 13 before process is counted successively are again to aspiration pump 14 discharges.Enter embedded microcontroller 16(MCU behind the output signal process photosignal discriminator (OPTS) of scintillator counter 5) calculate and export.
Locating wheel 6 is installed in a side of particle analysis to measure module housing for the buffering location of paper tape transfer point, and the take-up pulley 7 that is arranged on locating wheel 6 belows is used for collection through the filter paper of over-sampling; Escapement 9 is used for the parallel paper feeding in the particle analysis to measure module of filter paper by optoelectronic switch location, filter paper without sampling twists on the feed wheel 8 of escapement 9 belows, after Atmospheric particulates enter particle analysis to measure device, measure by analysis, from the gas outlet out.
Such as Fig. 3, be the particle collector synoptic diagram of the utility model embodiment: atmospheric aerosol samples is introduced into the first order 1-1 of secondary impacting type cutter for particles, large particle is blocked in here, little particle enters the second level 1-2 of secondary impacting type cutter for particles, aerodynamic diameter will be blocked greater than 10 microns particle, will be passed through less than 10 microns particles.Through connecting pipe 1-4, enter cyclone fine particle separator 1-5.Large entraining air stream produces vortex through cyclone fine particle separator 1-5, and aerodynamic diameter is blocked in the outside greater than 2.5 microns particle, can pass through less than 2.5 microns particles.Out enter the external dynamic dew-point control system less than 2.5 microns particles through connecting pipe 1-6.
Referring to Fig. 4, the external dynamic dew-point control system structural representation of the utility model embodiment: high-accuracy temperature-humidity sensor 2-1 is installed on the gas circuit supervisor 2-4, and silica gel heating plate 2-2 is installed on the gas circuit supervisor 2-4, the highdensity heat-insulation layer 2-3 of outer wrap.Silica gel heating plate 2-2 has homogeneous heating, long service life, the characteristics such as low in energy consumption, its frequency of operation receives the instruction of embedded microcontroller in real time, dynamically control temperature and the relative humidity of aerosol sample, guaranteed the efficient of particle transmission, eliminated because of dewfall or temperature overheating and cause the measuring error that the disappearance of gaseous state particle brings.
Among the utility model embodiment, the scintillator counter signals exports photosignal discriminator (OPTS) to, through the adjustment of amplitude, eliminates baseline noise, improves signal to noise ratio (S/N ratio), greatly reduces the detection limit of measurement.Please refer to Fig. 2, enter the signal conditioner that is formed by OPA128KM and precision resistance electric capacity peripheral components after each road photo-sensor signal will output, enter again the bandpass filter that is formed by LT1062CN and peripheral components, enter again the voltage amplifier that is formed by OPA2277U and peripheral components, enter multiplexer with the time-division multichannel again, carry out signal gating by embedded system, enter successively the emitter follower that is comprised of TLC2252, the ADS1255 that then enters analog to digital converter 24Bit is converted into digital signal output.
Such as Fig. 5, be the specific implementation block diagram of embedded microcontroller system of the present utility model (MCU): the signaling interface 16-1 through photosignal discriminator (OPTS) inputs to embedded microcontroller 16-3, the analog signal interface 16-2 such as humiture also input to embedded microcontroller 16-3, export LCDs 16-4 to through behind the data operation, user's input instruction inputs to embedded microcontroller 16-3 by simple key interface 16-5.Peripheral digital interface 16-6 exports digital signal to host computer or external unit, and peripheral analog interface 16-7 to external unit or registering instrument, is used for storage or the control of measurement data with analog signal output.
The utility model noise is low, and antijamming capability is strong, and measuring accuracy is high, data stabilization, and production cost is low, and degree domestic is high.
The utility model can be applicable to airborne fine particulate matter (PM
10, PM
5, PM
2.5, PM
1) the monitoring of the automatically monitoring of continuous monitoring, atmosphere ash haze, mobile monitoring, plant area and the multiple occasion particle concentration such as airport and scientific research.
The utility model adopts external dynamic dew-point control system (ODH), has guaranteed the transmission of gaseous state particle, has greatly improved aerocolloidal transfer efficiency.
Above content is the further description of the utility model being done in conjunction with concrete embodiment, can not assert that implementation of the present utility model is confined to these explanations.For the those of ordinary skill of the technical field under the utility model, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (6)
1. β rays method airborne fine particulate matter automatic monitor for continuously instrument, it is characterized in that: it comprises particle collector, external dynamic dew-point control system, stainless steel elbow, particle analysis to measure module, the front temperature sensor of meter, the front pressure transducer of meter, flow control valve, photosignal discriminator, embedded microcontroller system, the particle collector is communicated with the external dynamic dew-point control system, and the external dynamic dew-point control system is communicated with particle analysis to measure module by stainless steel elbow; Described particle analysis to measure module upper end at right angle setting β ray assembly, the lower end is vertically installed with the scintillator counter, described particle analysis to measure module one side is provided with the filter paper paper feed, an other side is provided with the filter paper delivery device, filter paper is at the filter paper paper feed, between scintillator counter and β ray assembly, pass by under the driving of filter paper delivery device, the particle analysis to measure module on the lower port of giving vent to anger at position is connected to aspiration pump by connecting tube, described giving vent to anger is connected with the front temperature sensor of meter between port and the aspiration pump, pressure transducer before the meter, flow control valve enters the output of embedded microcontroller system-computed behind the described scintillator counter output signal process photosignal discriminator.
2. β rays method airborne fine particulate matter automatic monitor for continuously instrument as claimed in claim 1 is characterized in that: crooked 135 ゜ of described stainless steel elbow, and inner wall smooth, diameter are 8mm, its bending radius is not less than 3 times of diameter.
3. β rays method airborne fine particulate matter automatic monitor for continuously instrument as claimed in claim 1, it is characterized in that: described particle collector is comprised of secondary impacting type cutter for particles and cyclone fine particle separator.
4. β rays method airborne fine particulate matter automatic monitor for continuously instrument as claimed in claim 1, it is characterized in that: described outside gas circuit dynamic dew-point control system comprises the gas circuit supervisor, be provided with the silica gel heating sheet among the described gas circuit supervisor, the periphery of silica gel heating sheet is enclosed with heat-insulation layer, in the described heat-insulation layer near the silica gel heating sheet high-accuracy temperature-humidity sensor is installed.
5. β rays method airborne fine particulate matter automatic monitor for continuously instrument as claimed in claim 1, it is characterized in that: described filter paper delivery device comprises locating wheel, take-up pulley, described locating wheel is installed on the paper delivery end of particle analysis to measure module, and described take-up pulley is positioned at the outer side-lower of locating wheel of relative page orientation.
6. β rays method airborne fine particulate matter automatic monitor for continuously instrument as claimed in claim 1, it is characterized in that: described filter paper paper feed comprises escapement, feed wheel, described escapement is installed on the paper feed end of particle analysis to measure module, and described feed wheel is positioned at the escapement side-lower of relative page orientation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220514526 CN202916165U (en) | 2012-10-09 | 2012-10-09 | Instrument for continually and automatically monitoring atmospheric fine-particulates by adopting Beta ray method |
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|---|---|---|---|
| CN 201220514526 CN202916165U (en) | 2012-10-09 | 2012-10-09 | Instrument for continually and automatically monitoring atmospheric fine-particulates by adopting Beta ray method |
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| CN202916165U true CN202916165U (en) | 2013-05-01 |
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| CN 201220514526 Expired - Fee Related CN202916165U (en) | 2012-10-09 | 2012-10-09 | Instrument for continually and automatically monitoring atmospheric fine-particulates by adopting Beta ray method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712898A (en) * | 2013-07-30 | 2014-04-09 | 戴艺 | Atmosphere suspended particulate matter mass concentration detector |
| CN104359816A (en) * | 2014-11-19 | 2015-02-18 | 武汉怡特环保科技有限公司 | Beta-ray atmospheric particulate matter monitoring device |
| CN104819919A (en) * | 2015-05-20 | 2015-08-05 | 北京曼德克环境科技有限公司 | Detector for content of discharged particulate matter |
| CN104990850A (en) * | 2015-08-10 | 2015-10-21 | 华北电力大学（保定） | Air particulate matter monitoring system |
| CN105092445A (en) * | 2015-09-10 | 2015-11-25 | 湖南长重机器股份有限公司 | Online monitoring device and method for PM2.5 industrial flue gas |
| CN107179221A (en) * | 2017-06-29 | 2017-09-19 | 苏州浪声科学仪器有限公司 | PM2.5 sampling apparatuses |
| CN107271339A (en) * | 2017-06-29 | 2017-10-20 | 苏州浪声科学仪器有限公司 | Fine grained on-line analysis device |
| CN107449685A (en) * | 2017-08-17 | 2017-12-08 | 青岛众瑞智能仪器有限公司 | A kind of integrated β rays dust concentration direct-reading measurement device |
| CN107589054A (en) * | 2017-09-01 | 2018-01-16 | 中煤科工集团重庆研究院有限公司 | A kind of dust concentration testing agency based on β radiation absorptions, system and method |
| CN107917862A (en) * | 2017-12-29 | 2018-04-17 | 安徽蓝盾光电子股份有限公司 | A kind of Beta ray method particle monitoring devices with automatic early-warning |
| CN108663297A (en) * | 2018-06-20 | 2018-10-16 | 暨南大学 | Atmospheric particulates sample lines integrate quality control system |
| CN111077049A (en) * | 2019-12-27 | 2020-04-28 | 安徽安光环境科技有限公司 | Portable β ray method particulate matter concentration monitoring system |
-
2012
- 2012-10-09 CN CN 201220514526 patent/CN202916165U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712898A (en) * | 2013-07-30 | 2014-04-09 | 戴艺 | Atmosphere suspended particulate matter mass concentration detector |
| CN104359816A (en) * | 2014-11-19 | 2015-02-18 | 武汉怡特环保科技有限公司 | Beta-ray atmospheric particulate matter monitoring device |
| CN104819919B (en) * | 2015-05-20 | 2017-11-21 | 北京曼德克环境科技有限公司 | A kind of granular material discharged content detection instrument |
| CN104819919A (en) * | 2015-05-20 | 2015-08-05 | 北京曼德克环境科技有限公司 | Detector for content of discharged particulate matter |
| CN104990850A (en) * | 2015-08-10 | 2015-10-21 | 华北电力大学（保定） | Air particulate matter monitoring system |
| CN105092445A (en) * | 2015-09-10 | 2015-11-25 | 湖南长重机器股份有限公司 | Online monitoring device and method for PM2.5 industrial flue gas |
| CN105092445B (en) * | 2015-09-10 | 2018-04-20 | 湖南长重机器股份有限公司 | A kind of on-Line Monitor Device and its method of PM2.5 industrial smokes |
| CN107271339A (en) * | 2017-06-29 | 2017-10-20 | 苏州浪声科学仪器有限公司 | Fine grained on-line analysis device |
| CN107179221A (en) * | 2017-06-29 | 2017-09-19 | 苏州浪声科学仪器有限公司 | PM2.5 sampling apparatuses |
| CN107449685A (en) * | 2017-08-17 | 2017-12-08 | 青岛众瑞智能仪器有限公司 | A kind of integrated β rays dust concentration direct-reading measurement device |
| CN107589054A (en) * | 2017-09-01 | 2018-01-16 | 中煤科工集团重庆研究院有限公司 | A kind of dust concentration testing agency based on β radiation absorptions, system and method |
| CN107917862A (en) * | 2017-12-29 | 2018-04-17 | 安徽蓝盾光电子股份有限公司 | A kind of Beta ray method particle monitoring devices with automatic early-warning |
| CN108663297A (en) * | 2018-06-20 | 2018-10-16 | 暨南大学 | Atmospheric particulates sample lines integrate quality control system |
| CN111077049A (en) * | 2019-12-27 | 2020-04-28 | 安徽安光环境科技有限公司 | Portable β ray method particulate matter concentration monitoring system |
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| 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: 20130501 Termination date: 20141009 |
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| EXPY | Termination of patent right or utility model |