CN105572004A - Suspension particle concentration measuring instrument and measuring method thereof - Google Patents
Suspension particle concentration measuring instrument and measuring method thereof Download PDFInfo
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- CN105572004A CN105572004A CN201510973144.XA CN201510973144A CN105572004A CN 105572004 A CN105572004 A CN 105572004A CN 201510973144 A CN201510973144 A CN 201510973144A CN 105572004 A CN105572004 A CN 105572004A
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- particle concentration
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- 239000002245 particle Substances 0.000 title claims abstract description 48
- 239000000725 suspension Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 48
- 239000007787 solid Substances 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 10
- 238000012546 transfer Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 7
- 239000008187 granular material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036651 mood Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000005406 washing 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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention relates to a suspension particle concentration measuring instrument, comprising a power source, a laser, a photocell, a signal amplifier, a data acquisition control system, a computer and a probe; the laser and the photocell are disposed on the probe, a distance between the laser and the photocell is adjustable, and the photocell is used for receiving light emitted by the laser; the photocell is connected with the signal amplifier, the signal amplifier is connected with the data acquisition control system which is connected with the computer and the power source; the invention also relates to a measuring method of the suspension particle concentration measuring instrument. The invention is applicable to black solid particles, retains advantages of the reflecting fiber method and improves measurement precision; using is simple with no need for sample post-treatment, and the cost is reasonable.
Description
Technical field
The present invention relates to a kind of suspension particle concentration measuring apparatus and measuring method thereof.
Background technology
In polyphasic flow reactor fluid mechanics parameter field tests, the measurement of concetration of suspended particle is a requisite importance.Parameter test method is of a great variety, can be divided into intrusive mood and non-intrusion measurement method by the physical principle of detection method.
For non-intrusion type, to measurement system, Particle Image Velocity instrument (PIV) and Laser Doppler Velocimeter (LDV) all require that printing opacity dispersed phase volume fraction is less than 5%, can be used for from low speed until the measurement of the astable flow field velocity of hypervelocity; Its application of ultrasound tomography technology (UCT) is confined to disperse phase content lower than 20% and cannot measure in real time.Above-mentioned several comparatively conventional means of testing is confined to phase content and cannot measures in real time, and corresponding instrument is very expensive.
For intrusive mood, the most conventional no more than direct sample and reflection-type optical fiber probe.Obtain representative sample, direct sampling method there are certain requirements sample rate and volume, and the concentration detection method of institute's sample thief be mainly dry weight method (by suspending liquid repeatedly centrifuge washing and weigh the quality of separating particles to calculate the method for suspension concentration after dry process), operating process is complicated.Along with going deep into of research, photoelectric detection method starts to occur.Photoelectric detection method is according to the suspending liquid of variable concentrations to the scattering of the light method of determining concentration different from absorption, because of its fast, accurately and automaticity is high, become the main stream approach that suspension concentration detects very soon.Photoelectric detection method is divided into scattering method, transmission beam method and falls apart thoroughly than method etc.These three kinds of methods are detect to determine granule density by the ratio of scattered light intensity, transmitted intensity and scattered light and transmitted intensity after suspending liquid respectively.Reflection-type optical fiber probe photoelectric detection method category owned by France, but because black solid particle is to light reflection difference, therefore existing reflection-type optical fiber probe is not suitable for the Concentration Testing of black solid particle.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of suspension particle concentration measuring apparatus and measuring method thereof, be applicable to black solid particle, draw the advantage of reflecting light nanofarads, improve measuring accuracy; Easy to use needs carries out sample aftertreatment, and cost is reasonable.
For achieving the above object, the present invention adopts following technical scheme: a kind of suspension particle concentration measuring apparatus, is characterized in that: comprise power supply, laser instrument, photoelectric cell, signal amplifier, data acquisition control system, computing machine and probe; Described laser instrument and photoelectric cell to be arranged on described probe and described laser instrument and photronic spacing adjustable, the light that described photoelectric cell sends for receiving described laser instrument; Described photoelectric cell is connected with described signal amplifier, and described signal amplifier is connected with described data acquisition control system, and described data acquisition control system is connected with described computing machine and power supply.
A measuring method for suspension particle concentration measuring apparatus, is characterized in that comprising the following steps:
Step S1: the concentration according to testing sample regulates laser instrument and photronic spacing, regulates principle to be that concentration to be measured is higher, selects spacing less;
Step S2: be positioned in testing sample by described probe, switches on power for measuring instrument is powered simultaneously, makes laser instrument emission of light;
Step S3: photoelectric cell receives described light through the light signal after described testing sample, and this light signal is converted to electric signal;
Step S4: described electric signal carries out returning to zero and amplifying process through described signal amplifier, then transfers to computing machine through described data acquisition control system and carries out processing and obtain light through the magnitude of voltage after testing sample;
Step S5: the suspension particle concentration obtaining testing sample according to described magnitude of voltage and voltage-suspension particle concentration curve.
The present invention compared with prior art has following beneficial effect: the present invention is used for reactor inner suspension liquid granule density and measures, and is applicable to black solid particle, has drawn the advantage of reflecting light nanofarads, the resolution of instrument is improved a lot; Meanwhile, probe emission end and receiving end distance with can survey concentration range and there is corresponding relation, instrument is suitable for wider.
Accompanying drawing explanation
Fig. 1 is present system structure principle chart.
Fig. 2 is probe structure schematic diagram of the present invention.
Fig. 3 is the voltage-suspension particle concentration curve schematic diagram of one embodiment of the invention.
In figure: 1-probe, 2-laser instrument; 3-photoelectric cell.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Please refer to Fig. 1, the invention provides a kind of suspension particle concentration measuring apparatus, comprise power supply, laser instrument, photoelectric cell, signal amplifier, data acquisition control system, computing machine and probe, please refer to Fig. 2, described laser instrument 2 and photoelectric cell 3 are arranged on described probe 1 and described laser instrument 2 is adjustable with the spacing of photoelectric cell 3, and in one embodiment of the invention, this spacing is 5mm, the light that described photoelectric cell 3 sends for receiving described laser instrument 2, in order to meet collimate light, described probe is rigid structure, guarantee the light that photoelectric cell 3 in just measuring process can receive laser instrument 2 and sends, described photoelectric cell is connected with described signal amplifier, described signal amplifier returns to zero to the signal that photoelectric cell transmits, amplify, described signal amplifier is connected with described data acquisition control system, described data acquisition control system is connected with described computing machine and power supply, described power supply is that whole measuring instrument is powered, described data acquisition control system is used for the data of collection signal amplifier transfer, the magnitude of voltage obtained after obtaining by the process of computing machine the light therethrough testing sample sent from laser instrument 2.
Described laser instrument 2 is on-dispersive light source, and the wavelength of the light sent is 650nm, and it can obtain from the semiconductor laser of cheapness, and light penetration testing sample is to the photoelectric cell 3 of the other end.Light arrives photoelectric cell 3 two kinds of modes: one is directly project on photoelectric cell 3; Two be light after the Multiple Scattering of suspended particle in testing sample, finally scatter on photoelectric cell 3.Arrive photoelectric cell 3 and carry out opto-electronic conversion, the electric signal after conversion enters into signal amplifier and data acquisition control system.At signal amplifier and data acquisition control system, signal is through zeroing, amplification and gather, and can obtain the magnitude of voltage of light therethrough testing sample, can be extrapolated the granule density of testing sample by the voltage of testing sample.
For transmitted light Concentration Testing method; the incident parallel light (if divergent beams need through collimation process) sent from light source enters in the middle of suspending liquid; particle in suspending liquid can produce scattering and absorption to light; light (i.e. transmitted light) intensity through suspending liquid is reduced; theoretical according to Lambert-Beer; by the impact of suspended particle content, there is certain function corresponding relation between the two, draw the content of particle in suspending liquid with this in the attenuation degree of transmitted light.
Described photronic spectral range 300nm-1000nm, peak wavelength is 700nm.
Described signal amplifier is programmable signal amplifier, and its enlargement factor is adjustable.
The present invention also provides a kind of measuring method of suspension particle concentration measuring apparatus, comprises the following steps:
Step S1: the concentration according to testing sample regulates laser instrument and photronic spacing, regulate principle to be that concentration to be measured is higher, select spacing less, laser instrument and photoelectric cell spacing range are 1-50mm;
Step S2: be positioned in testing sample by described probe, switches on power for measuring instrument is powered simultaneously, makes laser instrument emission of light;
Step S3: photoelectric cell receives described light through the light signal after described testing sample, and described light signal is converted to electric signal;
Step S4: described electric signal carries out returning to zero and amplifying process through described signal amplifier, then transfers to computing machine through described data acquisition control system and carries out processing and obtain light through the magnitude of voltage after testing sample;
Step S5: the suspension particle concentration obtaining testing sample according to described magnitude of voltage and voltage-suspension particle concentration curve.Be illustrated in figure 3 the voltage-suspension particle concentration curve schematic diagram of one embodiment of the invention.
Voltage-concentration curve in described step S5 is drawn by rating test, and concrete steps are as follows: the solids suspension of configuration variable concentrations, records the light of laser instrument transmitting through the magnitude of voltage after each concentration of solids particle suspension liquid respectively with measuring instrument; Set up voltage-suspension particle concentration coordinate system, by marking in voltage-suspension particle concentration coordinate system after the concentration of each solids suspension and the magnitude of voltage one_to_one corresponding that records and making curve, obtain voltage-suspension particle concentration curve.
Especially, before rating test, need by high-speed stirred thus make the even particle distribution of the solids suspension of each concentration, needing by the localized rich angle value in different position measurement demarcation systems on the other hand, ensureing even concentration.Concentration in rating test is that proportioning is good in advance, and magnitude of voltage is directly read by measuring instrument.
The detection of overall process has been controlled automatically by data acquisition control system, described data acquisition control system first controls the light that laser instrument sends some strength, then the magnitude of voltage produced after arriving photoelectric cell to light therethrough testing sample is sampled, and contrasts the granule density value that the voltage-suspension particle concentration curve obtained by rating test directly reads testing sample.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (8)
1. a suspension particle concentration measuring apparatus, is characterized in that: comprise power supply, laser instrument, photoelectric cell, signal amplifier, data acquisition control system, computing machine and probe; Described laser instrument and photoelectric cell to be arranged on described probe and described laser instrument and photronic spacing adjustable, the light that described photoelectric cell sends for receiving described laser instrument; Described photoelectric cell is connected with described signal amplifier, and described signal amplifier is connected with described data acquisition control system, and described data acquisition control system is connected with described computing machine and power supply.
2. suspension particle concentration measuring apparatus according to claim 1, is characterized in that: described laser instrument is on-dispersive light source, and the wavelength of the light sent is 650nm.
3. suspension particle concentration measuring apparatus according to claim 1, is characterized in that: described photronic spectral range 300nm-1000nm, and peak wavelength is 700nm.
4. suspension particle concentration measuring apparatus according to claim 1, is characterized in that: described probe is rigid structure.
5. suspension particle concentration measuring apparatus according to claim 1, is characterized in that: described signal amplifier is programmable signal amplifier, and its enlargement factor is adjustable.
6. the measuring method of the suspension particle concentration measuring apparatus according to any one of claim 1-5, is characterized in that comprising the following steps:
Step S1: the concentration according to testing sample regulates laser instrument and photronic spacing, regulates principle to be that concentration to be measured is higher, selects spacing less;
Step S2: be positioned in testing sample by described probe, switches on power for measuring instrument is powered simultaneously, makes laser instrument emission of light;
Step S3: photoelectric cell receives described light through the light signal after described testing sample, and this light signal is converted to electric signal;
Step S4: described electric signal carries out returning to zero and amplifying process through described signal amplifier, then transfers to computing machine through described data acquisition control system and carries out processing and obtain light through the magnitude of voltage after testing sample;
Step S5: the suspension particle concentration obtaining testing sample according to described magnitude of voltage and voltage-suspension particle concentration curve.
7. the measuring method of suspension particle concentration measuring apparatus according to claim 6, is characterized in that: in described step S1, laser instrument and photoelectric cell spacing range are 1-50mm.
8. the measuring method of suspension particle concentration measuring apparatus according to claim 6, it is characterized in that: the voltage-concentration curve in described step S5 is drawn by rating test, the step of described rating test is as follows: the solids suspension of configuration variable concentrations, records the light of laser instrument transmitting through the magnitude of voltage after each concentration of solids particle suspension liquid respectively with measuring instrument; Set up voltage-suspension particle concentration coordinate system, by marking in voltage-suspension particle concentration coordinate system after the concentration of each solids suspension and the magnitude of voltage one_to_one corresponding that records and making curve, obtain voltage-suspension particle concentration curve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510973144.XA CN105572004A (en) | 2015-12-23 | 2015-12-23 | Suspension particle concentration measuring instrument and measuring method thereof |
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| CN201510973144.XA CN105572004A (en) | 2015-12-23 | 2015-12-23 | Suspension particle concentration measuring instrument and measuring method thereof |
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| CN105572004A true CN105572004A (en) | 2016-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525961A (en) * | 2016-11-03 | 2017-03-22 | 中国海洋大学 | Method for detecting water turbidity through ultrasonic wave |
| CN108956395A (en) * | 2017-05-18 | 2018-12-07 | 中兴通讯股份有限公司 | A kind of method and terminal of air atom Concentration Testing |
| CN109781667A (en) * | 2019-01-29 | 2019-05-21 | 中国石油集团川庆钻探工程有限公司 | Optical nonradioactive sand mulling concentration measuring device and method |
| CN113029888A (en) * | 2021-03-31 | 2021-06-25 | 中国科学院过程工程研究所 | Device and method for calibrating particle concentration in gas-solid two-phase flow |
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2015
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525961A (en) * | 2016-11-03 | 2017-03-22 | 中国海洋大学 | Method for detecting water turbidity through ultrasonic wave |
| CN108956395A (en) * | 2017-05-18 | 2018-12-07 | 中兴通讯股份有限公司 | A kind of method and terminal of air atom Concentration Testing |
| CN108956395B (en) * | 2017-05-18 | 2021-01-08 | 中兴通讯股份有限公司 | Method and terminal for detecting air particle concentration |
| CN109781667A (en) * | 2019-01-29 | 2019-05-21 | 中国石油集团川庆钻探工程有限公司 | Optical nonradioactive sand mulling concentration measuring device and method |
| CN113029888A (en) * | 2021-03-31 | 2021-06-25 | 中国科学院过程工程研究所 | Device and method for calibrating particle concentration in gas-solid two-phase flow |
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Application publication date: 20160511 |