CN102004067B - Detection system and method of particles in liquid - Google Patents
Detection system and method of particles in liquid Download PDFInfo
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- CN102004067B CN102004067B CN 200910168181 CN200910168181A CN102004067B CN 102004067 B CN102004067 B CN 102004067B CN 200910168181 CN200910168181 CN 200910168181 CN 200910168181 A CN200910168181 A CN 200910168181A CN 102004067 B CN102004067 B CN 102004067B
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- 239000002245 particle Substances 0.000 title claims abstract description 114
- 238000001514 detection method Methods 0.000 title claims abstract description 68
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract 4
- 239000012530 fluid Substances 0.000 claims description 42
- 239000011148 porous material Substances 0.000 claims description 2
- 241000931526 Acer campestre Species 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 8
- 230000003321 amplification Effects 0.000 abstract 4
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 5
- 239000008187 granular material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The embodiment of the invention discloses a detection system of particles in liquid, which comprises a laser light source, a detection pool, a receiving sensor, a signal amplifier and a pulse counter, wherein laser sent by the laser light source is emitted into tested liquid in the detection pool to obtain optical signals, the receiving sensor is used for receiving optical signals and converting the optical signals into electric signals, the signal amplifier is used for amplifying the electric signals to obtain amplification signals, and the pulse counter is used for carrying out comparison processing on the amplification signals. A method comprises the concrete processes of: determining standard electric signals conforming to the amplification signals, determining the grain diameter intervals of particles in the tested liquid according to the corresponding relationship between the set standard particle grain diameter and the standard electric signals, and determining the corresponding particle quantity according to the amplification signal quantity. The detection system disclosed by the embodiment of the invention realizes the precise, real-time and concrete measurement on the grain diameter and the quantity of the particles in the liquid.
Description
Technical field
The present invention relates to the liquid detecting technical field, more particularly, relate to a kind of detection system and method for particles in liquid.
Background technology
In the detection method of the particle in liquid, be generally a branch of narrow and small laser produced by the 780nm semiconductor laser, with the direction vertical with detected flow direction, produce pulse when particle process light beam interface.Through the analysis to described pulse, calculate particle diameter and the number situation of particles in liquid.
Prior art is utilized index--the turbidity of reaction particles thing quantity and distribution on the whole, reacts the situation of detected liquid.Yet during the particle significant change, because described turbidity reaction itself is slower, described prior art can not be reacted the size of particle in fluid to be measured and the quantity of correspondingly-sized delicately in water; Because the color of particle in water has certain influence to described turbidity, thereby described prior art can not clear situation of accurately reacting fluid to be measured.
Summary of the invention
In view of this, the invention provides a kind of detection system and method for particles in liquid, to realize particle diameter and accurate, the real-time and concrete measurement of quantity to the particle in liquid.
A kind of detection system of particles in liquid comprises: LASER Light Source, detection cell, receiving sensor, signal amplifier and impulse meter, wherein:
Described LASER Light Source is sent the fluid to be measured in the described detection cell of laser incident, obtains light signal, and described detection cell is slit;
Described receiving sensor is used for receiving described light signal, and described light signal is converted to electric signal;
Described signal amplifier, for described electric signal is amplified, is amplified signal;
Described impulse meter is for comparing processing by described amplifying signal, and detailed process comprises:
Determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Determine corresponding particle quantity according to the quantity of described amplifying signal.
Preferably, described receiving sensor is photodiode, and the electric signal obtained by described photodiode converts is voltage pulse signal, and described standard electric signal is voltage signal.
Preferably, described system also comprises the filtrator filtered flowing into described detection cell fluid to be measured before.
Preferably, the pore size filter of described filtrator is 0.175mm.
Preferably, described system also comprises the fluid to be measured flow velocity compensation system be arranged in described detection cell, while changing for the flow velocity that works long hours when described system, by particle quantity replenishment control flow velocity, make the fluid to be measured flow velocity in detection cell reach preset flow rate.
Preferably, described slit cross-sectional area is 0.4mm*1mm.
Preferably, the flow velocity of the fluid to be measured of described detection cell is 60ml/min, and the particle maximum capacity of described fluid to be measured is 18000/ml.
Preferably, described LASER Light Source is the laser diode that the light wavelength sent is 360-780nm.
A kind of detection method of particles in liquid comprises:
Laser is injected in the fluid to be measured in described detection cell, obtains light signal, described detection cell is slit;
Described light signal is converted to electric signal;
Described electric signal is amplified, be amplified signal;
Determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Determine corresponding particle quantity according to the quantity of described amplifying signal.
Preferably, describedly light signal is converted to electric signal is specially: light signal is converted to voltage pulse signal, and described standard electric signal is standard voltage signal.
From above-mentioned technical scheme, can find out, detection cell in the embodiment of the present invention adopts the slit design, complement filter device and fluid to be measured current velocity controller, make in described fluid to be measured the particle of crossing almost can pass through one by one, effectively avoid the overlapping and error that causes of particle; The present invention adopts the laser diode of stable 780nm as light source, has overcome that light in the prior art is not concentrated and the out of true of the not good enough measurement caused of brightness, thereby has further improved accuracy of measurement; The present invention is corresponding with the standard voltage signal of voltage pulse signal by various particle standard particle diameters, and described normal voltage is enrolled to Single Chip Microcomputer (SCM) program, particle size interval according to the corresponding certain granules thing of described standard voltage signal, determine the particle quantity of each particle size interval according to the quantity of described voltage pulse signal, realized real-time, the concrete detection to the fluid to be measured particle; Simultaneously, described system is not disturbed by the color of particle, and liquid property is not had to particular requirement, easy to implement the method.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The detection system schematic diagram that Fig. 1 is the embodiment of the present invention one disclosed a kind of particles in liquid;
The detection system schematic diagram that Fig. 2 is the embodiment of the present invention two disclosed a kind of particles in liquids;
The schematic diagram of the detection cell in the detection system that Fig. 3 is the disclosed a kind of particles in liquid of the embodiment of the present invention;
The detection method schematic diagram that Fig. 4 is the disclosed a kind of liquid particles thing of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of liquid particles quality testing examining system and method, to realize particle diameter and accurate, the real-time and concrete measurement of quantity to the particle in liquid.
Fig. 1 shows the detection system structure of particles in liquid, comprising: LASER Light Source 101, detection cell 102, receiving sensor 103, signal amplifier 104 and impulse meter 105, wherein:
Described LASER Light Source 101: send the fluid to be measured in the described detection cell 102 of laser incident, obtain light signal, in the present embodiment, the LASER Light Source of selecting is laser diode, and the wavelength sent is 780nm monochromatic light, and described monochromatic light is stable, and brightness is high;
Described detection cell 102: described detection cell is the slit that cross-sectional area is 0.4mm*1mm, and the flow velocity of the fluid to be measured of described detection cell is 60ml/min (2.5m/s), and the particle maximum capacity of described fluid to be measured is 18000/ml;
Described receiving sensor 103: for receiving described light signal, and described light signal is converted to electric signal, in the present embodiment, the receiving sensor of selecting is photodiode, comprise and light signal can be converted to the silicon photocell of voltage pulse signal, described photodiode is subject to the variable effect of temperature humidity little, and luminous sensitivity is high;
Described signal amplifier 104: for described electric signal is amplified, be amplified signal;
Described impulse meter 105: for described amplifying signal is compared to processing, detailed process comprises:
Determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Determine corresponding particle quantity according to the quantity of described amplifying signal.
Described standard electric signal is by enrolling in Single Chip Microcomputer (SCM) program, the particle diameter of corresponding standard particle thing, and according to the particle of the corresponding certain particle size interval of this particle diameter, the particle in described particle size interval all be take this standard electric signal and is determined as benchmark.
Also show system peripherals facility processing of circuit part 106, display module 107 and pulpit 108 in figure, wherein:
Processing of circuit part 106: for determined described particle particle size interval and described particle quantity information and peripheral hardware are carried out to communication;
Described display module 107: for showing in real time the interval corresponding particle quantity of different-grain diameter, the interval corresponding different display channels of described different-grain diameter, the described particle quantity that partly can simultaneously show 8 passages that shows, in the present embodiment, described display module selects LCD display to realize this functions of modules;
Described pulpit 108: the operator can see the particle quantity situation of 8 passages of described display module in described pulpit 108.
In above-described embodiment, detection cell adopts the slit design, and in embodiment, the size of preferred 0.4mm*1mm can guarantee that it is all to pass through one by one that the above particle of 2mm surpasses 99%, effectively avoid the overlapping and error that causes of particle; The present invention adopts the laser diode of stable 780nm as light source, has overcome that light in the prior art is not concentrated and the out of true of the not good enough measurement caused of brightness, thereby has further improved accuracy of measurement; The present invention is corresponding with the standard voltage signal of voltage pulse signal by various particle standard particle diameters, and described normal voltage is enrolled to Single Chip Microcomputer (SCM) program, particle size interval according to the corresponding certain granules thing of described standard voltage signal, determine the particle quantity of each particle size interval according to the quantity of described voltage pulse signal, realized real-time, the concrete detection to the fluid to be measured particle.
Fig. 2 shows the detection system structure of embodiment bis-particles in liquids, comprise: LASER Light Source 201, filtrator 202, detection cell 203, receiving sensor 204, signal amplifier 205 and impulse meter 206, wherein: filtrator is arranged at liquid by before detection cell, described filtrator has realized that particle passes through detection cell one by one, effectively avoided the overlapping and error that causes of particle, also guaranteed that detection cell can not blocked by the bulky grain thing simultaneously.
Also show system peripherals facility processing of circuit part 207, display module 208 and pulpit 209 in figure.
Fig. 3 shows the schematic diagram of the detection cell in the detection system of the disclosed particles in liquid of embodiment, detection cell shown in figure 303, and LASER Light Source (laser diode) 301 and photodiode 302, the cross sectional dimensions of described detection cell is 0.4mm*1mm, the flow velocity of the fluid to be measured of described detection cell is 60ml/min (2.5m/s), the particle maximum capacity of described fluid to be measured is 18000/ml, described detection cell coordinates the flow velocity compensation system, for working long hours when described system, when flow velocity changes, by to particle quantity replenishment control flow velocity, make the fluid to be measured flow velocity in detection cell reach preset flow rate.
It should be noted that, described flow velocity 60ml/min (2.5m/s) has 5% adjustment amount, if exceed this scope, must be supplemented.
In addition, described system is not disturbed by the color of particle, and liquid property is not had to particular requirement, as long as transparent, described method is simple.
Fig. 4 shows the detection method of embodiment mono-disclosed particles in liquid, comprises the following steps:
Step 401: laser is injected in the fluid to be measured in described detection cell, obtains light signal;
Step 402: described light signal is converted to electric signal;
Step 403: described electric signal is amplified, be amplified signal;
Step 404: determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Step 405: according to the quantity of described amplifying signal, determine corresponding particle quantity.
Fig. 5 shows in the detection method of embodiment bis-disclosed particles in liquids, comprises the following steps:
Step 501: described fluid to be measured is filtered by filtrator;
Step 502: laser is injected in the fluid to be measured in described detection cell, obtains light signal;
Step 503: described light signal is converted to electric signal;
Step 504: described electric signal is amplified, be amplified signal;
Step 505: determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Step 506: according to the quantity of described amplifying signal, determine corresponding particle quantity.
It should be noted that: described method can adopt based on the analysis of ultrasonic scattering decay spectra and realize, that is: by the acoustic attenuation of actual measurement spectrum with calculate theoretical acoustic attenuation spectrum according to the acoustic scattering formula together with, build matrix and linear equation and solve, realize the calculating to particle mean size with bifrequency decay ratioing technigue, calculate size-grade distribution with optimization method, and go out granule density according to the grain graininess inverse.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates and gets final product referring to method.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. the detection system of a particles in liquid, is characterized in that, comprising: LASER Light Source, detection cell, filtrator, flow velocity compensation system, receiving sensor, signal amplifier and impulse meter, wherein:
Described LASER Light Source is sent the fluid to be measured in the described detection cell of laser incident, obtains light signal, and described detection cell is slit; Described optical maser wavelength is 780nm;
Described filtrator is filtered flowing into described detection cell fluid to be measured before, makes particle in described fluid to be measured pass through one by one detection cell; The pore size filter of described filtrator is 0.175mm;
With the fluid to be measured flow velocity compensation system be arranged in described detection cell, while changing for the flow velocity that works long hours when described system, by particle quantity replenishment control flow velocity, make the fluid to be measured flow velocity in detection cell reach preset flow rate;
Described receiving sensor is used for receiving described light signal, and described light signal is converted to electric signal;
Described signal amplifier, for described electric signal is amplified, is amplified signal;
Described impulse meter is for comparing processing by described amplifying signal, and detailed process comprises:
Determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Determine corresponding particle quantity according to the quantity of described amplifying signal.
2. system according to claim 1, is characterized in that, described receiving sensor is photodiode, and the electric signal obtained by described photodiode converts is voltage pulse signal, and described standard electric signal is voltage signal.
3. according to the described system of claim 1-2 any one, it is characterized in that, described slit cross-sectional area is 0.4mm*1mm.
4. according to the described system of claim 1-2 any one, it is characterized in that, the flow velocity of the fluid to be measured of described detection cell is 60ml/min, and the particle maximum capacity of described fluid to be measured is 18000/ml.
5. according to the described system of claim 1-2 any one, it is characterized in that, described LASER Light Source is the laser diode that the light wavelength sent is 780nm.
6. the detection method of a particles in liquid, is characterized in that, described method is applied in the described system of claim 1-5 any one, and the method comprises:
Filtered flowing into described detection cell fluid to be measured before, make particle in described fluid to be measured pass through one by one detection cell; Wherein, the aperture of filtration is 0.175mm;
Laser is injected in the fluid to be measured in described detection cell, obtains light signal, described detection cell is slit, and the fluid to be measured flow velocity in detection cell need reach preset flow rate; Described light signal is converted to electric signal; The wavelength of described laser is 780nm;
Described electric signal is amplified, be amplified signal;
Determine the standard electric signal consistent with this amplifying signal, and, according to the corresponding relation of the particle size interval that presets the standard particle thing and standard electric signal, determine the particle size interval of particle in fluid to be measured;
Determine corresponding particle quantity according to the quantity of described amplifying signal;
Wherein, the fluid to be measured flow velocity in described detection cell need reach preset flow rate and comprise: when described system works long hours flow velocity while changing, by particle quantity replenishment control flow velocity, make the fluid to be measured flow velocity in detection cell reach preset flow rate.
7. method according to claim 6, is characterized in that, describedly light signal is converted to electric signal is specially: light signal is converted to voltage pulse signal, and described standard electric signal is standard voltage signal.
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| CN104345018B (en) * | 2014-06-04 | 2019-03-05 | 秦少平 | A kind of streaming particulate matter measuring instrument based on detector array |
| CN105651673B (en) * | 2015-12-31 | 2018-11-02 | 北京怡和嘉业医疗科技股份有限公司 | Efficacy detection device, detection method and the lung ventilator of filter core |
| CN106053320B (en) * | 2016-05-18 | 2019-02-19 | 深圳市青核桃科技有限公司 | A method of laser particle counter is calibrated using plain particles |
| CN105842142A (en) * | 2016-05-18 | 2016-08-10 | 深圳市青核桃科技有限公司 | Method for calibrating laser particle counter by using single standard particle |
| 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 |
| CN107860693A (en) * | 2017-11-02 | 2018-03-30 | 深圳市卓尔思科技有限公司 | A kind of liquid detecting instrument and liquid detecting method |
| CN116165122A (en) * | 2023-03-13 | 2023-05-26 | 上海幸励科技有限公司 | Particle counting monitoring platform and implementation method thereof |
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