CN107917862A - A kind of Beta ray method particle monitoring devices with automatic early-warning - Google Patents
A kind of Beta ray method particle monitoring devices with automatic early-warning Download PDFInfo
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- CN107917862A CN107917862A CN201711500386.2A CN201711500386A CN107917862A CN 107917862 A CN107917862 A CN 107917862A CN 201711500386 A CN201711500386 A CN 201711500386A CN 107917862 A CN107917862 A CN 107917862A
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- beta
- sealing plate
- filter paper
- detector
- platen sealing
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Classifications
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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
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0637—Moving support
- G01N15/0643—Moving support of the filter type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
- G01N2223/04—Investigating materials by wave or particle radiation by transmission and measuring absorption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/10—Different kinds of radiation or particles
- G01N2223/102—Different kinds of radiation or particles beta or electrons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/50—Detectors
- G01N2223/505—Detectors scintillation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/635—Specific applications or type of materials fluids, granulates
Abstract
The invention discloses a kind of Beta ray method particle monitoring devices with automatic early-warning, it includes fixed plate, sample collection part, sample measurement part, filter paper, the movement executing mechanism part of platen sealing plate, filter paper support and movable part and filter paper movable length measure part；Sample collection part includes air inlet pipe, detector seat, the setting plate of detector, platen sealing plate etc.；The Beta X-ray detection Xs unit and Beta radioactive sources that sample measurement part is installed on detector seat and Beta source(-)holders by face form；Filter paper is through detector and platen sealing plate；The movement executing mechanism part of platen sealing plate for lever and drive eccentric group into lever construction, filter paper support and movable part include driven sheet feed stacker, active paper collecting disk and friction roller；Filter paper movable length determination part point includes optocoupler catch, optoelectronic switch and optoelectronic switch stent.The present invention has the characteristics that simple in structure, performance is stable, reliability is high.
Description
Technical field
The present invention relates to air detection device technical field, especially a kind of Atmospheric particulates automatic monitor for continuously equipment,
More particularly to a kind of Beta ray method particle monitoring devices with automatic early-warning.
Background technology
Pellet and fine particle are all the particulate matter to suspend in an atmosphere, and simply particle size is different.PM is
The acronym of English particulate matter (particulate matter).Particulate matter of the particle diameter below 10 microns is known as inhalable
Particulate matter, also known as PM10.Particulate matter of the particle diameter less than or equal to 2.5 microns is fine particle, also known as PM2.5, and PM2.5 is PM10
A part.The chemical composition of Atmospheric particulates changes very big because its source is different in type and quantity.Due to inhalable
Particulate matter mostlys come from artificial source, such as motor-vehicle tail-gas, industrial dust, castoff burning and city raised dust, mostly fires
Burn product and contain a large amount of harmful components.Compared with thicker Atmospheric particulates, PM2.5 particle diameters are small, rich in a large amount of
Poisonous and harmful substances and residence time in an atmosphere is long, fed distance is remote, and the diameter of particulate matter is smaller, into exhaling
It is deeper to inhale the position in road, therefore PM2.5 is to the influence bigger of health and atmosphere quality.In addition, pellet
Also there is important influence to visibility etc. with fine particle.
The common monitoring method of Atmospheric particulates has at present：Gravimetric method, Beta attenuation sensors, vibration microbalance
Method.
By atmospheric sample by there is the sampler of certain cutting characteristic in gravimetric method measurement process, it is fixed to be extracted with constant speed
The volumes of air of amount, makes the PM2.5 in outside ambient air be trapped within the filter membrane of known quality, according to filter membrane before and after sampling
Weight difference and sampling volume, calculate PM2.5 concentration.
Filter membrane weight method measure be particulate matter absolute mass concentration, its principle is simple, determination data is reliable, measurement
The influence of shape, size and color from particulate matter etc., but during measure, it is cumbersome, time-consuming, sampling instrument is stupid
Weight, noise are big, and cannot provide test result immediately.
The filter membrane that vibration microbalance method collects particulate matter is placed at the top of a glass tube, in the glass tube application electric field
Vibration, as the particulate matter collected on filter membrane is continuously increased, the frequency of oscillation of glass tube reduces, and the sensitivity of method is about 1~2
μ g/m3, typical resolving time are 5min.In order to maintain necessary precision, conical component must keep constant temperature, to avoid swollen
Influence caused by swollen or contraction, and the temperature that to rise progressively so just is avoided that ambient humidity to remove the moisture adsorbed
Influence caused by change.But no matter sample is heated at sampling head or at conical component, it can all make half in aerosol
Volatile materials loses.
After Beta attenuation sensors principle passes through material to be determined for Beta rays, its strength retrogression's degree is only with being pierced
The quality of material is related, and unrelated with its physics, chemical property.Beta attenuation sensors advantages are that requirement sample size is seldom, can
An automatically derived monitoring data per hour, reflect the situation of change of particulate in air concentration in real time, and can carry out data biography
It is defeated, be conducive to remotely monitor and automatically control, and greatly reduce labor workload.Therefore, Beta ray methods have become
The main measurement method of the automatic monitor for continuously instrument of atmosphere particle concentration.The drawback is that apparatus structure is complicated, measurement essence
Degree influenced by many factors such as gas circuit structure, paper feed precision, be finished during use for paper tape or improper disconnected paper can not and
When judge easily cause monitoring data occur mistake or missing.
The content of the invention
The object of the present invention is to provide one kind can overcome Beta ray methods atmosphere particulate monitoring instrument in the prior art
It is complicated, precision susceptible, the shortcomings of disconnected paper or scarce paper cannot being judged in time, simple in structure, performance is stable, reliability
High has the function of the Beta ray method particle monitoring devices of automatic early-warning.
In order to solve the problems existing in background technology, the present invention is to use following technical scheme：One kind has automatic pre-
The Beta ray method particle monitoring devices of alert function, it include fixed plate, sample collection part, sample measurement part, filter paper,
Movement executing mechanism part, filter paper support and the movable part of platen sealing plate and filter paper movable length measure part；
The sample collection part includes air inlet pipe, detector seat, the setting plate of detector, platen sealing plate, O-shaped sealing
Circle, Beta source(-)holders and air outlet pipe, the platen sealing plate is installed on below detector seat, between platen sealing plate and detector seat
It is provided with the setting plate of detector；O-ring seals are equipped between platen sealing plate and Beta source(-)holders, detector seat is fixed on Beta sources
Seat upper surface；
Sample measurement part by face be installed on Beta X-ray detection Xs unit on detector seat and Beta source(-)holders and
Beta radioactive sources form；Wherein, the Beta X-ray detection Xs unit is by highly sensitive photomultiplier, plastic scintillant, shielding
The highly integrated integrated Beta ray detectors of the compositions such as window, bleeder circuit, signal processing unit, high-voltage power module；
The filter paper is through detector and platen sealing plate, when when test sample gas is flowed through from sampling channel, in sample gas
Particulate matter will be concentrated on the filter paper and form dust spot；The radiation of the dust spot, the test surface of detector and Beta radioactive sources
Face three is parallel to each other and center is located at same straight line；
The movement executing mechanism part of the platen sealing plate for lever and driving eccentric group into lever construction, it is described
One end of lever and platen sealing plate upper surface are tangent, and the other end of lever is provided with rolling bearing, the rolling bearing it is outer
Surface and the outer surface of the driving eccentric wheel are tangent, and for lever middle by axis connection on detector seat, the axis can phase
Detector seat is rotated；
Filter paper support and movable part include driven sheet feed stacker, active paper collecting disk and friction roller, the filter paper by
Driven sheet feed stacker enters the sample collection part after friction roller, and filter paper enters actively receipts after being pierced by sample collection part
Paper wheel；
The filter paper movable length determination part point includes optocoupler catch, optoelectronic switch and optoelectronic switch stent, the optocoupler
Catch is installed in same fixing axle with friction roller, and is rotated with friction roller, and the optoelectronic switch is opened by photoelectricity
Close stent and screw is fixed in fixed plate.
As a further improvement on the present invention；The platen sealing plate is equipped with two cylinders being interference fitted therewith
Pin, platen sealing plate are connected by straight pin with the straight pin guide sleeve in detector seat, below detector seat, straight pin
Be clearance fit between straight pin guide sleeve, platen sealing plate can opposing detector seat move up and down.
As a further improvement on the present invention；The detector seat is fixed by bolts on Beta source(-)holders by aluminum casing
Surface.
As a further improvement on the present invention；The air inlet pipe is bend pipe, to prevent particulate matter from adhering in air inlet pipe,
The bend pipe of selection is stainless steel jointless sanitary pipe, and the bending radius of bend pipe is more than 80mm.
As a further improvement on the present invention；The movement executing mechanism of the platen sealing plate is also comprising camshaft, convex
Wheel mounting base, cam motor, optocoupler catch shaft coupling and two optoelectronic switches, camshaft pass through optocoupler catch shaft coupling and motor
It is connected；The optocoupler catch shaft coupling is equipped with U-shaped breach, and eccentric wheel is at extreme higher position and extreme lower position, U-shaped breach and institute
Optoelectronic switch sensor is stated to correspond to respectively.
As a further improvement on the present invention；The motor is DC speed-reducing.
As a further improvement on the present invention；The active paper collecting disk is provided with driving motor, and it is straight to drive motor
Flow decelerating motor.
After adopting the above technical scheme, the invention has the advantages that：
The function of sample collection and sample detection is integrated in one by the present invention, realizes continuous monitoring, eliminates and walk up and down
Influence of the paper to measurement accuracy, it is possible to achieve the continuous, stable of particle concentration, accurate measurements.The Beta ray methods of the present invention
Particle monitoring device filter paper is mobile and filter paper movable length measures part, realizes the high precision movement of filter paper, and filtering
Energy timely automated diagnosis when paper is abnormal, avoids monitoring data missing or mistake.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of embodiment provided by the present invention；
Fig. 2 is the structure diagram of the movement executing mechanism of platen sealing plate in embodiment provided by the present invention；
Fig. 3 is sample collection and measurement top partial view diagram in embodiment provided by the present invention；
Reference numeral：
1- air inlet pipe；2- detector seats；The setting plate of 3- detectors；4- platen sealing plates；5-O type sealing rings；6-Beta sources
Seat；7- air outlet pipes；8-Beta X-ray detection X units；9-Beta radioactive sources；10- filter paper；11- levers；12- rolling bearings；13- turns
Axis；14- platen sealing plates；The driven sheet feed stackers of 15-；16- active paper collecting disks；17- friction rollers；18- optocoupler catch；19- photoelectricity
Switch；20- optoelectronic switch stents；21- straight pins；22- straight pin guide sleeves；23- drives eccentric wheel；24- camshafts；25- cams
Mounting base；26- optocoupler catch shaft couplings；27- cam motors；28- fixed plates；29- aluminum casings；30- detector installing plates.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
Mode, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are only explaining this
Invention, is not intended to limit the present invention.
- Fig. 3 is please referred to Fig.1, present embodiment uses following technical scheme：It is a kind of that there is automatic early-warning
Beta ray method particle monitoring devices, it includes air inlet pipe 1, detector seat 2, the setting plate 3 of detector, platen sealing plate 4, O
Type sealing ring 5, Beta source(-)holders 6, air outlet pipe 7, Beta X-ray detection Xs unit 8, Beta radioactive sources 9, filter paper 10, lever 11, rolling
Bearing 12, shaft 13, platen sealing plate 14, driven sheet feed stacker 15, active paper collecting disk 16, friction roller 17, optocoupler catch 18, light
Electric switch 19, optoelectronic switch stent 20, straight pin 21, straight pin guide sleeve 22, driving eccentric wheel 23, camshaft 24, cam installation
Seat 25, optocoupler catch shaft coupling 26, cam motor 27, fixed plate 28, aluminum casing 29 and detector installing plate 30；
The setting plate 3 of the air inlet pipe 1, detector seat 2, detector, platen sealing plate 4, O-ring seal 5, Beta source(-)holders 6
Sample collection part is formed with air outlet pipe 7；The air inlet pipe 1 is bend pipe, to prevent particulate matter from adhering to what is selected in air inlet pipe
Bend pipe is more than 80mm for the bending radius of stainless steel jointless sanitary pipe and bend pipe；The Beta source(-)holders 6 are fixed by screws in spy
Survey on device installing plate 30, detector installing plate 30 is connected by screw with fixed plate 28；Platen sealing plate 4 is equipped with two therewith
The straight pin 21 of interference fit, platen sealing plate 4 are connected by straight pin 21 with the straight pin guide sleeve 22 in detector seat 2, peace
Mounted in the lower section of detector seat 2；It is clearance fit between straight pin 21 and straight pin guide sleeve 22, platen sealing plate 4 opposite can be visited
Device seat 2 is surveyed to move up and down；O-ring seals 5 are equipped between platen sealing plate 4 and Beta source(-)holders 6；Detector seat 2 passes through aluminum casing
29 are fixed by bolts to 6 upper surface of Beta source(-)holders.
The Beta X-ray detection Xs unit 8 and Beta radioactive sources 9 form sample measurement part, Beta X-ray detection X units
8 and Beta radioactive sources, 9 face is installed on detector seat 2 and Beta source(-)holders 6.The Beta X-ray detection Xs unit 8 is by height
The height of the compositions such as sensitive photomultiplier, plastic scintillant, shielding windows, bleeder circuit, signal processing unit, high-voltage power module
Spend integrated Beta ray detectors.
The lever construction that the lever 11, driving eccentric wheel 23 form is the movement executing mechanism portion of platen sealing plate 4
Point, one end with arc surface and 4 upper surface of platen sealing plate of lever 11 are tangent；The other end of lever 11 is provided with rolling bearing
12, the outer surface of the rolling bearing 12 is tangent with driving the outer surface of eccentric wheel 23, and rolling bearing 12 is used to reduce driving partially
Rolling bearing 12 is with driving the tangential force at both contact surfaces of eccentric wheel 23 when heart wheel 23 rotates.The middle part of lever 11 passes through shaft 13
It is connected on detector seat 2, to be fixedly connected between lever 11 and shaft 13, the shaft 13 can be 2 turns with opposing detector seat
It is dynamic.The movement executing mechanism of platen sealing plate 14 further includes two optoelectronic switches 19, camshaft 24, cam mounting base 25, cam
Motor 27 and optocoupler catch shaft coupling 26, driving eccentric wheel 23 are fixed on 24 one end of camshaft, and 24 other end of camshaft passes through convex
It is connected after wheel mounting base 25 by optocoupler catch shaft coupling 26 with cam motor 27.Cam mounting base 25 is fixed by screws in solid
On fixed board 28.Optocoupler catch shaft coupling 26 is equipped with U-shaped breach, and driving eccentric wheel 23, which is gone to, makes lever 11 move to extreme higher position
During with extreme lower position, U-shaped breach is corresponding with an optoelectronic switch sensor respectively, can so to drive eccentric wheel 23 to move
Can accurately it stop to during required position.
The filter paper 10 is through detector seat 2 and platen sealing plate 4.When needing sampled measurements：27 band of cam motor
Dynamic driving eccentric wheel 23 so that lever 11 contacts one end with driving eccentric wheel 23 and moves down, and platen sealing plate 4 is sealed in O shapes
Moved up under the elastic restoring force effect of circle 5, filter paper 10 is pressed on detector seat sealing plate 3 in the following, such as by platen sealing plate 4
This, forms a closed sampling channel, sample gas can only enter from air inlet pipe 1, from outlet between air inlet pipe 1 and air outlet pipe 7
Pipe 7 is extracted out.When test sample gas is flowed through from sampling channel, the particulate matter in sample gas will be concentrated on the filter paper 10 and form dust spot.
The emitting surface three of the dust spot, the test surface of Beta X-ray detection Xs unit 8 and Beta radioactive sources 9 is parallel to each other and center is located at
Same straight line.By detecting the change of 8 signal of Beta X-ray detection Xs unit and sampling flow in sampling process, sample can be obtained
The concentration of particulate matter in gas.
The driven sheet feed stacker 15, active paper collecting disk 16 and friction roller 17 form filter paper support and movable part, described
Filter paper 10 enters the sample collection part by driven sheet feed stacker 15 after friction roller 17, and filter paper is pierced by sample collection part
Enter active paper collecting disk 16 afterwards；
The optocoupler catch 18, optoelectronic switch 19 and optoelectronic switch stent 20 form filter paper movable length measure part, light
Coupling catch 18 is installed in same fixing axle 14 with friction roller 17, and optocoupler catch 18 can be rotated with friction roller 17.
Optoelectronic switch 19 is fixed in fixed plate 28 by the optoelectronic switch stent 20 and screw.When needing mobile filter paper：Cam electricity
Machine 27 drives driving eccentric wheel 23 so that lever 11 contacts one end with driving eccentric wheel 23 and is moved upwards up to peak, lever 11
One end is contacted with platen sealing plate 4 to move down so that platen sealing plate 4 is separated with detector seat sealing plate 3；Active paper collecting disk
16 rotate clockwise under the drive of motor, drive filter paper 10 to move right, and optocoupler catch 18 is with friction roller 17 in filter paper 10
Rotated clockwise between friction roller 17 under the drive of frictional force, optoelectronic switch 19 detects small through hole movement on optocoupler catch 18
Number then control motor rotation whether, measure and control so as to fulfill the displacement distance to filter paper.Using such a knot
Structure, when when filter paper 10 occur and being finished or surprisingly break paper, active paper collecting disk 16 rotates, optoelectronic switch 19 can not detect optocoupler
The rotation of catch 18, therefore error message can be diagnosed automatically in first time, can in time prompting maintenance personnel to instrument
Device is overhauled, and avoids the missing or mistake of monitoring data.
The present invention has the characteristics that simple in structure, performance is stable, reliability is high.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (9)
- A kind of 1. Beta ray method particle monitoring devices with automatic early-warning, it is characterised in that it include fixed plate, Sample collection part, sample measurement part, filter paper, the movement executing mechanism part of platen sealing plate, filter paper support and move portion Divide and filter paper movable length measures part；The sample collection part include air inlet pipe, detector seat, the setting plate of detector, platen sealing plate, O-ring seal, Beta source(-)holders and air outlet pipe, the platen sealing plate are installed on below detector seat, are set between platen sealing plate and detector seat It is equipped with the setting plate of detector；O-ring seals are equipped between platen sealing plate and Beta source(-)holders, detector seat is fixed on Beta source(-)holders Upper surface；The sample measurement part is installed on Beta X-ray detection Xs unit and Beta on detector seat and Beta source(-)holders by face Radioactive source forms；The filter paper is through detector and platen sealing plate, when when test sample gas is flowed through from sampling channel, in sample gas Grain thing, which will be concentrated on the filter paper, forms dust spot；The emitting surface three of the dust spot, the test surface of detector and Beta radioactive sources Person is parallel to each other and center is located at same straight line；The movement executing mechanism part of the platen sealing plate for lever and driving eccentric group into lever construction, the lever One end and platen sealing plate upper surface it is tangent, the other end of lever is provided with rolling bearing, the outer surface of the rolling bearing Tangent with the outer surface of the driving eccentric wheel, lever middle by axis connection on detector seat, opposite can visit by the axis Device seat is surveyed to rotate；The filter paper support and movable part include driven sheet feed stacker, active paper collecting disk and friction roller, and the filter paper is by driven Sheet feed stacker enters the sample collection part after friction roller, and filter paper enters active collection after being pierced by sample collection part Wheel；The filter paper movable length determination part point includes optocoupler catch, optoelectronic switch and optoelectronic switch stent, the optocoupler catch It is installed in same fixing axle with friction roller, and is rotated with friction roller, the optoelectronic switch passes through optoelectronic switch branch Frame and screw are fixed in fixed plate.
- 2. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is, the platen sealing plate is equipped with two straight pins being interference fitted therewith, platen sealing plate by straight pin with Straight pin guide sleeve in detector seat is connected, and below detector seat, matches somebody with somebody between straight pin and straight pin guide sleeve for gap Close, platen sealing plate can opposing detector seat move up and down.
- 3. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the detector seat is fixed by bolts to Beta source(-)holders upper surface by aluminum casing.
- 4. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the air inlet pipe is bend pipe, and the bend pipe of selection is stainless steel jointless sanitary pipe, and the bending radius of bend pipe is more than 80mm。
- 5. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the movement executing mechanism of the platen sealing plate is also comprising camshaft, cam mounting base, cam motor, optocoupler gear Piece shaft coupling and two optoelectronic switches, camshaft are connected by optocoupler catch shaft coupling with motor；The optocoupler catch shaft coupling U-shaped breach is equipped with, for eccentric wheel at extreme higher position and extreme lower position, U-shaped breach and the optoelectronic switch sensor are right respectively Should.
- 6. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the motor is DC speed-reducing.
- 7. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the active paper collecting disk is provided with driving motor, and it is DC speed-reducing to drive motor.
- 8. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is that the Beta X-ray detection Xs unit is by highly sensitive photomultiplier, plastic scintillant, shielding windows, bleeder circuit, letter The highly integrated integrated Beta ray detectors of number processing unit, high-voltage power module composition.
- 9. a kind of Beta ray method particle monitoring devices with automatic early-warning according to claim 1, it is special Sign is, the filter paper is through detector seat and platen sealing plate, it is necessary to during sampled measurements：Cam motor drives driving inclined Heart wheel so that lever contacts one end with driving eccentric wheel and moves down, and platen sealing plate is made in the elastic restoring force of O-ring seals Moved up under, filter paper detector seat sealing plate is pressed on by platen sealing plate in the following, in this way, air inlet pipe and air outlet pipe it Between form a closed sampling channel, sample gas can only enter from air inlet pipe, from air outlet pipe extraction；Treat test sample gas from sampling channel When flowing through, the particulate matter in sample gas, which will be concentrated on the filter paper, forms dust spot, the spy of the dust spot, Beta X-ray detection X units The emitting surface three of survey face and Beta radioactive sources is parallel to each other and center is located at same straight line, by detecting Beta in sampling process The change of X-ray detection X cell signal and sampling flow, obtain the concentration of particulate matter in sample gas；When needing mobile filter paper：Cam motor drives driving eccentric wheel so that lever is with driving eccentric wheel to contact one end to moving up Peak is moved, lever contacts one end with platen sealing plate and moves down so that platen sealing plate and detector seat sealing plate point From；Active paper collecting disk rotates clockwise under the drive of motor, drives filter paper to move right, optocoupler catch is being filtered with friction roller Rotated clockwise between paper and friction roller under the drive of frictional force, of small through hole movement on optoelectronic switch detection optocoupler catch Whether the rotation of number and then control motor, measure and control so as to fulfill the displacement distance to filter paper；It is finished when there is filter paper Or during unexpected disconnected paper when active paper collecting disk rotates, optoelectronic switch can not detect the rotation of optocoupler catch, will in first time Error message is diagnosed automatically.
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| CN201711500386.2A CN107917862B (en) | 2017-12-29 | 2017-12-29 | Beta ray method particulate matter monitoring devices with automatic early warning function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765157A (en) * | 2019-02-26 | 2019-05-17 | 北京清环宜境技术有限公司 | Particulate matter on-line computing model based on β ray method |
| CN111024573A (en) * | 2019-12-30 | 2020-04-17 | 安徽安光环境科技有限公司 | Sampling and detecting device of β ray method atmospheric particulates monitor |
| 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 |
| CN111982769A (en) * | 2020-08-30 | 2020-11-24 | 宋保德 | Rotatory detection device in turn of beta-ray method atmospheric particulates |
| CN112730179A (en) * | 2020-12-23 | 2021-04-30 | 天津智易时代科技发展有限公司 | Portable beta-ray in-situ online monitor and monitoring method |
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Address after: Electronic industrial zone Anhui city Tongling province Shicheng road 244000 Patentee after: ANHUI LANDUN PHOTOELECTRON Co.,Ltd. Patentee after: Anhui Anguang Environmental Technology Co.,Ltd. Address before: Electronic industrial zone Anhui city Tongling province Shicheng road 244000 Patentee before: ANHUI LANDUN PHOTOELECTRON Co.,Ltd. Patentee before: ANHUI ANGUANG ENVIRONMENT OPTICAL ENGINEERING TECHNOLOGY RESEARCH CENTER Co.,Ltd. |