CN108613995A - A kind of material purity detection device and method - Google Patents
A kind of material purity detection device and method Download PDFInfo
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- CN108613995A CN108613995A CN201810792514.3A CN201810792514A CN108613995A CN 108613995 A CN108613995 A CN 108613995A CN 201810792514 A CN201810792514 A CN 201810792514A CN 108613995 A CN108613995 A CN 108613995A
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- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 239000000463 material Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 83
- 239000000126 substance Substances 0.000 claims abstract description 61
- 238000009434 installation Methods 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 229910052786 argon Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/10—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A kind of material purity detection device of offer of the embodiment of the present invention and method, are related to substance detection technique field.Wherein, material purity detection device and method are realized to the non-contact detection of test substance based on radioisotopic ray attenuation principle, can effectively ensure the accuracy and reliability of testing result.
Description
Technical field
The present invention relates to substance detection technique fields, in particular to a kind of material purity detection device and method.
Background technology
Currently, more commonly used when carrying out flow measurement to substances such as liquified natural gas (abbreviation LNG) is Coriolis
Mass flowmenter, but the flowmeter is simply possible to use in the flow of measurement of species, can not detect the purity of the substances such as LNG or corresponding impurity
Quality.
Invention content
In view of this, a kind of material purity detection device of present invention offer and method, can effectively solve the problem that the above problem.
Present pre-ferred embodiments provide a kind of material purity detection device, and the material purity detection device includes same position
Plain radiation-emitting device, isotope ray reception device and mounting portion；
The isotope radiation-emitting device and isotope ray reception device are installed on by the mounting portion respectively to be waited for
The both sides in test tube road, and the isotope radiation-emitting device is towards the isotope ray reception device, so that by described
The isotope ray of isotope radiation-emitting device transmitting passes through the pipe under test to enter the isotope ray reception device
To realize the detection to the test substance in pipe under test..
In the selection of present pre-ferred embodiments, the mounting portion includes the first installation part and the second installation part, described
First installation part and second installation part are respectively arranged in the opposite both sides of the pipe under test, the isotope ray emission
Device is installed on the side of first installation part far from the pipe under test, and the isotope ray reception device is installed on institute
State side of second installation part far from the pipe under test.
In the selection of present pre-ferred embodiments, the mounting portion is clamp structure, and the clamp structure includes first
Clamping piece and the second clamping piece, the isotope radiation-emitting device and isotope ray reception device are respectively arranged at described
One clamping piece and the side of second clamping piece far from pipe under test.
In the selection of present pre-ferred embodiments, the first accommodating structure, the isotope are offered on the mounting portion
Radiation-emitting device includes for housing radioisotopic shielding storehouse, and the shielding storehouse is installed on first accommodating structure
In, and towards the isotope ray reception device.
In the selection of present pre-ferred embodiments, the isotope radiation-emitting device further includes collimator, the standard
Straight device is installed in first accommodating structure, and the collimator is located at the isotope ray reception device and the shielding
Between storehouse.
In the selection of present pre-ferred embodiments, the isotope ray reception device includes ray detector, described
Second accommodating structure opposite with first accommodating structure is further opened on mounting portion, the ray detector is installed on described
Second accommodating structure, and the ray detector is towards the shielding storehouse.
In the selection of present pre-ferred embodiments, the material purity detection device further includes data processor, described
Data processor is connect with the ray detector, described in the isotope ray judgement for being sent according to the ray detector
The purity information of test substance in pipe under test.
Present pre-ferred embodiments also provide a kind of gas purity detection method, are set applied to above-mentioned material purity detection
It is standby, the method includes：
Ray detector detection is emitted by the isotope radiation-emitting device in preset period of time and after overdamping
The transmitted intensity of isotope ray, and convert the isotope transmitted intensity detected to electric signal and be sent to data processor；
The data processor calculates density of the test substance under different moments according to the electric signal received；
Based on the preset period of time, the data processor judged under different moments, the density value of the test substance
Whether less than preset value the purity meet demand of the test substance is judged if being less than.
In the selection of present pre-ferred embodiments, the method further includes：
The data processor is according to density value of the test substance being calculated under different moments into line density
Drawing of Curve, and the density curve completed is shown so that user sentences according to density curve progress gas purity
It is fixed.
In the selection of present pre-ferred embodiments, the transmitted intensity I is calculated by the following formula to obtain：
I=I0exp(-umρ X), wherein I0For the intensity of incident ray, umFor the mass-absorption coefficient of substance, ρ is to be measured
The density of substance, the substance thickness that X is penetrated by ray.
Compared with prior art, a kind of material purity detection device of present invention offer and method, wherein the material purity is examined
Measurement equipment and material purity detection method realize the non-contact detection to material purity using radioisotopic Decay Rate,
And detection process is not influenced by variations such as the temperature of measurand, forms, can effectively ensure testing result accuracy, can
By property and stability.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the frame structure schematic diagram of material purity detection device provided in an embodiment of the present invention.
Fig. 2 is the cross-sectional view of material purity detection device provided in an embodiment of the present invention.
Fig. 3 is another cross-sectional view of material purity detection device provided in an embodiment of the present invention.
Fig. 4 is the flow diagram of material purity detection method provided in an embodiment of the present invention.
Fig. 5 is the density curve schematic diagram of test substance in material purity detection process.
Icon：10- material purity detection devices；11- isotope radiation-emitting devices；110- shields storehouse；111- collimators；
12- isotope ray reception devices；120- ray detectors；13- mounting portions；The first accommodating structures of 130-；131- second is accommodating
Structure；14- data processors；20- pipe under test；30- equipment pipes；31- flanges.
Specific implementation mode
Through inventor the study found that by taking natural gas (LNG) as an example, the natural gas transportation in China substantially takes highway to transport
Defeated mode, but there is " stealing gas " phenomenon in the road transporting mode, and this bad phenomenon becomes worse, it is serious to hinder
The sound development of industry is hindered.Currently, common existing " stealing gas " means mainly have following three kinds in the market：
(1) metering cheating：For example, net weight of vehicle LNG after the completion of factory fills is 20 tons, client is transported on the way privately
0.2 ton of LNG is sold, 0.2 ton of water is then injected in brake block water tank, is weighed at user after unloading gas, secondary empty wagons weighs " skin
Bleed off water before weight ", or by increase and decrease personnel, steal and put the methods of stone and operate together.
(2) it is burnt in fortune：This certain small forwarding agent's uses of mode are relatively more, by hose by LNG gas phases pipe with start
Machine connects, in this fashion, general relatively due to the use of amount by directly using the LNG of gasification, stealing transported LNG
It is small, it is difficult to discover so comparing.
(3) it steals the beams and changes the pillars：The case where using " nitrogen ", " argon gas " to substitute LNG for another surreptitiously currently on the market happens occasionally, gradually
Develop into a ripe Dark Industry Link.Wherein, since price is there are larger difference, displacement single profit up to ten thousand yuan,
But the LNG of other gases was mixed, will produce product defect rate for the high user of certain calorific values or stability requirement is promoted
The even serious damage such as whole stove product rejection, the serious interests for damaging terminal client.
For above-mentioned three kinds " stealing gas " behaviors, (1) kind and (2) kind are that a degree of warp is caused during fortune
Ji loss；But the third steals the economic loss that gas mode not only can cause LNG transportational processes certain, and also affects correlation
LNG is using unit and causes very big economic loss.At the same time, can not also be discovered by general regulatory measure therein
Trick.
In view of the above-mentioned problems, a kind of material purity detection device 10 of offer of the embodiment of the present invention and method are to realize to substance
The detection of purity.In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
Applying the component of example can be arranged and designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
Fig. 1 and Fig. 2 are please referred to, is shown for the frame structure of material purity detection device 10 provided in an embodiment of the present invention
It is intended to, which includes isotope radiation-emitting device 11, isotope ray reception device 12 and installation
Portion 13, the isotope radiation-emitting device 11 and isotope ray reception device 12 are installed on by the mounting portion 13 respectively
The both sides of the pipe under test 20, and the isotope radiation-emitting device 11 is towards the isotope ray reception device 12,
So that it is described same to pass through the pipe under test 20 to enter by the isotope ray that the isotope radiation-emitting device 11 emits
Position element ray reception device 12 is to realize to the detection to the test substance in the pipe under test 20.
Wherein, the material purity detection device 10 that the present embodiment provides is penetrated based on radioisotopic isotope
Line after the material absorbing of different densities or purity, transmitted intensity can changed principle be designed, to realize pair
The detection of material density/purity.In the present embodiment, the material purity detection device 10 uses contactless measurement side
Formula can effectively avoid form (such as gas, liquid), temperature of test substance etc. from changing the influence to measurement process, effectively
Ensure the reliability, stability and accuracy of measurement result.In addition, the present invention uses contactless measurement method, Neng Gouyou
Effect avoids damage of the test substance to material purity detection device 10, such as corrosion, effectively extends its service life.
Firstly the need of explanation, the test substance of the detection of material purity detection device 10 provided in the present invention can be
Liquid (such as liquefied gas, oil), gas or solid etc., the present embodiment is not particularly limited herein.
Further, the mounting portion 13 is used to the material purity detection device 10 being installed on the pipe under test 20
On.In the present embodiment, according to the difference of the structure of the mounting portion 13, the mounting portion 13 can be solid by various ways
Due in the pipe under test 20, such as welding, screw are fixed or are clamped.Wherein, as an implementation, the installation
Portion 13 may include the first installation part and the second installation part, and first installation part and second installation part are respectively arranged in institute
The opposite both sides of pipe under test 20 are stated, the isotope radiation-emitting device 11 is installed on first installation part and is waited for far from described
The side in test tube road 20, the isotope ray reception device 12 are installed on second installation part far from the pipe under test 20
Side.
Alternatively embodiment, the mounting portion 13 can be clamp structure, and the clamp structure includes first
Clamping piece and the second clamping piece, the isotope radiation-emitting device 11 and isotope ray reception device 12 are respectively arranged at institute
State the first clamping member and the side of second clamping piece far from pipe under test 20.It should be noted that the reality of the mounting portion 13
Border structure can be but not limited to above two.In addition, in order to increase between the mounting portion 13 and the pipe under test 20
Fastness may be provided with non-slip mat at the position that the mounting portion 13 is contacted with 20 outer wall of the pipe under test, and such as described first
Rubber is set at the position that mounting portion (the first clamping member), the second mounting portion (the second clamping piece) are contacted with the pipe under test 20
Non-slip mat etc..In addition, according to the difference of the structure of 20 cross section of the pipe under test, such as 20 cross section of the pipe under test can be with
It is but not limited to round, oval or rectangle etc., then the shape of the mounting portion 13 and 20 contact position of the pipe under test can
To be matched with the shape of the pipe under test 20, such as first installation part (the first clamping member) and the second installation part (the second folder
Gripping member) and cross section be semicircle etc., the present embodiment is not limited herein.
Further, the isotope radiation-emitting device 11 is installed on the pipe under test 20 by the mounting portion 13
Side, such as the isotope radiation-emitting device 11 can be set by first mounting portion 13 or first clamping part
It is placed in the side of the pipe under test 20.According to actual demand, referring to Fig. 2, it is accommodating to offer first on the mounting portion 13
Structure 130, the isotope radiation-emitting device 11 include for housing radioisotopic shielding storehouse 110, the shielding
Storehouse 110 is installed in first accommodating structure 130, and towards the isotope ray reception device 12.It should be noted that position
Radioactive isotope in the shielding storehouse 110 can launch the gamma ray of at least one energy.
According to actual demand, in order to enable being imitated by the isotope ray maximum that the isotope radiation-emitting device 11 emits
The entrance isotope ray reception device 12 of rate, to improve the accuracy of detection of the material purity detection device 10, at this
In embodiment, the isotope radiation-emitting device 11 further includes collimator 111, which is installed on described first and holds
It sets in structure 130, and the collimator 111 is between the isotope ray reception device 12 and the shielding storehouse 110.Its
In, model of the collimator 111 etc. can flexibly be selected according to actual demand, and such as collimator 111 can be but not
It is limited to optical fiber collimator 111 etc..
Further, the isotope ray reception device 12 includes ray detector 120, is also opened on the mounting portion 13
Equipped with second accommodating structure 131 opposite with first accommodating structure 130, the ray detector 120 is installed on described
Two accommodating structures 131, and towards the shielding storehouse 110.Wherein, the ray detector 120 is for detecting by the shielding storehouse
It is emitted in 110 and passes through the test substance in the pipe under test 20 and the isotope transmitted intensity after decaying, it then will detection
To isotope ray in gammaphoton energy information be converted into electric signal after be transferred to processing system.
In the present embodiment, the intensity I of the isotope ray is logical can to cross formula I=I0exp(-umρ X) it is calculated, formula
In, I0For the intensity of incident ray, umFor the mass-absorption coefficient of substance, ρ is the density of test substance, and X is penetrated by ray
Substance thickness.Wherein, in the calculating of above-mentioned transmitted intensity I, absorption of the constant substance of component to radioactive isotope ray
Degree is only decided by the thickness X of the substance and the product of density p, therefore, rationally designs the structure of material purity detection device 10,
I.e. can guarantee substance in radiation ray have constant absorption path so that the intensity of isotope ray just only with measured object
The density p of matter is related.If in measurement process, it is found that the density p of substance can vary over, and is not always etc.
In the density of LNG, so that it may to judge that there are impurity in LNG.
Optionally, the ray detector 120 can be but not limited to be combined by scintillation crystal, electrooptical device and be formed
Detector, combined by scintillation crystal, light guide, electrooptical device in the detector formed either semiconductor detector one
Kind, the present embodiment is not particularly limited herein.
Further, the pure of test substance is intuitively observed according to the material purity detection device 10 for the ease of user
Degree/density information etc., in the present embodiment, the material purity detection device 10 further includes data processor 14, at the data
Reason device 14 is connect with the ray detector 120, is waited for described in the electric signal judgement for being emitted according to the ray detector 120
Purity/density information of test substance in test tube road 20.Specifically, the data processor 14 to the electric signal that receives into
The density of the test substance under different moments is calculated in row data analysis, and can be according to the test substance under different moments
Density is for statistical analysis, draws out the curve that density changes over time and display.
As an implementation, predeterminable in the data processor 14 to there is the material purity detection device 10 to detect
The number of pulses in electric signal, density information of the test substance when purity is met the requirements when the test substance of meet demand with
And the correspondence between density information and number of pulsesWherein, N0For the number of pulses for meeting when preset need,
ρ0For the density value for meeting when preset need, N is currently to measure obtained number of pulses, and ρ is the density value of test substance, that
, the data processor 14 can basisCalculate the density value of the test substance under current time
Optionally, the data processor 14 can be computer, mobile phone, server etc., and in the data processor 14
It may be provided with for realizing data input, the touching display screen that show of data or for being discontented in test substance purity/density
Alarm alarmed when sufficient demand etc., the present embodiment is not particularly limited herein.
In addition to the structure of the material purity detection device 10 of foregoing description, according to the difference of actual demand, such as Fig. 3 institutes
Show, the material purity detection device 10 may also include equipment pipe 30, and the mounting portion 13 is set to the equipment pipe 30
Both sides, the both ends of the equipment pipe 30 can be connect by flange 31 with pipe under test 20, so that in pipe under test 20
Test substance flows through the equipment pipe 30, and passes through institute by the isotope ray that the isotope radiation-emitting device 11 emits
It states equipment pipe 30 and enters the isotope ray reception device 12 to realize the detection to the test substance in pipe under test 20.
It should be noted that the connection relation between the mounting portion 13 and the equipment pipe 30 can refer to previously with regard to described in Fig. 2
The mounting portion 13 and the pipe under test 20 between connection relation, the present embodiment do not repeating herein.
Further, based on the design and description to above-mentioned substance purity detecting equipment 10, the embodiment of the present invention also provides
A kind of material purity detection method applied to the material purity detection device 10, it is pure to the substance below in conjunction with Fig. 4
The detailed process and step for spending detection method are introduced.
Step S10, ray detector 120 detection in preset period of time by the isotope radiation-emitting device 11 emit and
The transmitted intensity of isotope ray after overdamping, and convert the isotope transmitted intensity detected to electric signal and be sent to
Data processor 14；
Step S20, the data processor 14 calculate test substance under different moments according to the electric signal received
Density；
Step S30 is based on the preset period of time, and the data processor 14 judged under different moments, the determinand
Whether the density value of matter less than preset value judges the purity meet demand of the test substance if being less than.
When actual implementation, in order to enable user more intuitively observes the purity or density of test substance, the substance is pure
It further includes following step S40 to spend detection method.Step S40, the data processor 14 is according to the determinand being calculated
Density value of the matter under different moments carries out density curve drafting, and is shown the density curve completed so that user
Gas purity judgement is carried out according to the density curve.
It should be noted that in above-mentioned steps S10- steps S40, realized based on the material purity detection device 10
The specific process of material purity detection method can refer to the description to above-mentioned substance purity detecting equipment 10, and the present embodiment is herein
It repeats no more.In addition, in above-mentioned steps S10, the preset period of time can pre-enter at the data according to actual demand
Device 14 is managed, can be 30 minutes, 1 hour etc..
In order to further verify the validity of material purity detection device 10 and method that the present invention provides, inventor is to wait for
Survey substance is for natural gas (LNG), the material purity detection method provided to the present invention is introduced, and is as follows.
(1) the material purity detection device 10 is installed on to 20 outer wall of pipe under test of natural gas by mounting portion 13
On.
(2) during LNG stream crosses pipe under test 20, the radioactivity being located in the isotope ray irradiation device is same
The gamma ray that position element radiates passes through pipe under test 20 and LNG, and generates a degree of decaying, i.e., isotope ray receives
The transmitted intensity that ray detector 120 in device 12 detects is I=I0exp(-umρ X), I0For the intensity of incident ray, um
For the mass-absorption coefficient of substance, ρ is the density of test substance, the substance thickness that X is penetrated by ray.
(3) ray detector 120 converts the energy information of each gammaphoton in the isotope ray detected to
Electric signal is simultaneously sent to the progress LNG density calculating of data processor 14, to obtain the LNG density under different moments.
(4) for statistical analysis to the LNG density at calculated each moment, and draw out LNG density and change over time
Curve, if apparent fluctuation has occurred in density curve at a time, then it represents that participated in impurity in LNG.
Based on above-mentioned steps (1)-(4), for the accuracy of further validating substance purity detecting result, inventor is advance
The LNG (standard weights 20t) for having prepared the doping of 10 vehicle different impurities, using the material purity detection method pair 10 of above-described embodiment
Vehicle LNG is detected, and 10 vehicle LNG weight data tables are as follows：
| Group | Participate in impurity in advance | Practical LNG weight (t) |
| One vehicle | 0.01t nitrogen | 19.99 |
| Two vehicles | 0.02t nitrogen | 19.98 |
| Three vehicles | 0.1t nitrogen | 19.9 |
| Four vehicles | 0.2t nitrogen | 19.8 |
| Five vehicles | 0.01t argon gas | 19.99 |
| Six vehicles | 0.02t argon gas | 19.98 |
| Seven vehicles | 0.1t argon gas | 19.9 |
| Eight vehicles | 0.2t argon gas | 19.8 |
| Nine vehicles | 0.005t nitrogen+0.005t argon gas | 19.99 |
| Ten vehicles | 0.01t nitrogen+0.01t argon gas | 19.98 |
There is situation similar to Figure 5 for the density curve of 10 vehicle doped LN G, at a time on, LNG's
There is apparent fluctuation in density value, this means that, impurity is obviously mixed in LNG, it is possible thereby to judge in transportational process
In the presence of the malfeasance of gas gas leakage steathily.
In conclusion a kind of material purity detection device 10 of present invention offer and method, wherein material purity detection is set
For 10 and material purity detection method using the realization of radioisotopic Decay Rate to the non-contact detection of material purity, and
Detection process is not influenced by variations such as the temperature of measurand, forms, can effectively ensure the accuracy, reliable of testing result
Property and stability.
In the description of the present invention, term " setting ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixed
Connection, may be a detachable connection, or be integrally connected；It can be mechanical connection, can also be electrical connection；Can be direct
It is connected, can also can is indirectly connected through an intermediary the connection inside two elements.For the ordinary skill of this field
For personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In several embodiments that the embodiment of the present invention is provided, it should be understood that disclosed device and method also may be used
To realize by other means.Device and method embodiment described above is only schematical, for example, the stream in attached drawing
Journey figure and block diagram show that the device of preset quantity embodiment according to the present invention, method and computer program product may be real
Existing architecture, function and operation.In this regard, each box in flowchart or block diagram can represent module, a journey
A part for sequence section or code.A part for the module, section or code include one or preset quantity for realizing
Defined logic function.
It should also be noted that at some as in the realization method replaced, the function of being marked in box can also be with difference
The sequence marked in attached drawing occurs.For example, two continuous boxes can essentially be basically executed in parallel, they are sometimes
It can also execute in the opposite order, this is depended on the functions involved.It is also noted that in block diagram and or flow chart
The combination of each box and the box in block diagram and or flow chart can use the dedicated of function or action as defined in executing
Hardware based system is realized, or can be realized using a combination of dedicated hardware and computer instructions.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of material purity detection device, which is characterized in that the material purity detection device includes isotope ray emission
Device, isotope ray reception device and mounting portion；
The isotope radiation-emitting device and isotope ray reception device are installed on by the mounting portion respectively waits for test tube
The both sides in road, and the isotope radiation-emitting device is towards the isotope ray reception device, so that by the same position
The isotope ray of plain radiation-emitting device transmitting passes through the pipe under test to enter the isotope ray reception device with reality
Now to the detection of the test substance in pipe under test.
2. material purity detection device according to claim 1, which is characterized in that the mounting portion includes the first installation part
With the second installation part, first installation part and second installation part are respectively arranged in the opposite both sides of the pipe under test,
The isotope radiation-emitting device is installed on the side of first installation part far from the pipe under test, and the isotope is penetrated
Line reception device is installed on the side of second installation part far from the pipe under test.
3. material purity detection device according to claim 1, which is characterized in that the mounting portion is clamp structure, institute
It includes the first clamping member and the second clamping piece to state clamp structure, and the isotope radiation-emitting device and isotope ray receive dress
It sets and is respectively arranged at the first clamping member and the side of second clamping piece far from pipe under test.
4. material purity detection device according to claim 1, which is characterized in that offer the first appearance on the mounting portion
Structure is set, the isotope radiation-emitting device includes for housing radioisotopic shielding storehouse, the shielding storehouse installation
In first accommodating structure, and towards the isotope ray reception device.
5. material purity detection device according to claim 4, which is characterized in that the isotope radiation-emitting device is also
Including collimator, the collimator is installed in first accommodating structure, and the collimator is located at the isotope ray
Between reception device and the shielding storehouse.
6. material purity detection device according to claim 4, which is characterized in that the isotope ray reception device packet
Ray detector is included, second accommodating structure opposite with first accommodating structure is further opened on the mounting portion, it is described to penetrate
Line detector is installed on second accommodating structure, and the ray detector is towards the shielding storehouse.
7. material purity detection device according to claim 6, which is characterized in that the material purity detection device also wraps
Data processor is included, the data processor is connect with the ray detector, for what is sent according to the ray detector
Electric signal judges the purity information of the test substance in the pipe under test.
8. a kind of gas purity detection method, which is characterized in that be applied to the substance described in any one of the claims 1-7
Purity detecting equipment, the method includes：
Ray detector detection is emitted by the isotope radiation-emitting device in preset period of time and the same position after overdamping
The transmitted intensity of plain ray, and convert the isotope transmitted intensity detected to electric signal and be sent to data processor；
The data processor calculates density of the test substance under different moments according to the electric signal received；
Based on the preset period of time, the data processor judges whether the density value of the test substance under different moments is small
In preset value, if being less than, the purity meet demand of the test substance is judged.
9. gas purity detection method according to claim 8, which is characterized in that the method further includes：
The data processor carries out density curve according to density value of the test substance being calculated under different moments
It draws, and the density curve completed is shown so that user carries out gas purity judgement according to the density curve.
10. gas purity detection method according to claim 8, which is characterized in that the transmitted intensity I passes through following public affairs
Formula is calculated：
I=I0exp(-umρ X), wherein I0For the intensity of incident ray, umFor the mass-absorption coefficient of substance, ρ is test substance
Density, the substance thickness that X is penetrated by ray.
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