CN102004070B - Detection system of particles in liquid - Google Patents
Detection system of particles in liquid Download PDFInfo
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- CN102004070B CN102004070B CN 200910168180 CN200910168180A CN102004070B CN 102004070 B CN102004070 B CN 102004070B CN 200910168180 CN200910168180 CN 200910168180 CN 200910168180 A CN200910168180 A CN 200910168180A CN 102004070 B CN102004070 B CN 102004070B
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- 239000007788 liquid Substances 0.000 title claims abstract description 117
- 239000002245 particle Substances 0.000 title claims abstract description 92
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 230000003750 conditioning effect Effects 0.000 claims abstract description 24
- 230000003993 interaction Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 239000000700 radioactive tracer Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract 3
- 238000012545 processing Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses a detection system of particles in liquid, comprising a liquid pretreatment device and a circuit device connected with the liquid pretreatment device. The liquid pretreatment device comprises a weir pipe and a laser particle probe connected with the weir pipe, and the circuit device comprises a laser signal conditioning unit, a PLD (Programmable Logic Device) counter and an MCU (Microprogrammed Control Unit) which are sequentially connected. For an acquired liquid sample, the system presents the degree of particles contained in the liquid by counting the diameters and the number of the particles in the liquid sample so as to reach the aims of quantitatively describing the particles in the liquid and providing a reference for the liquid treatment.
Description
Technical field
The present invention relates to the liquid handling technical field, more specifically to particle detection system in a kind of liquid.
Background technology
In commercial production and daily life, often need to produce or life in various liquid handle and use.But often there are the different impurity of a lot of particle size or particle in these liquid, for processing and the use that does not influence liquid, need carry out suspension to these liquid and detect, the processing and the use that detect to these liquid by suspension provide good foundation.
Current, the detection of liquid especially water is characterized by this index of turbidity.So-called turbidity refers to that suspension in the water body makes light generation scattering and absorbs the degree of optical property, briefly be exactly represent water body to light in the scatterings of 90 degree and the intensity of absorption.
Yet turbidity is the scattering when passing liquid by light and is absorbed the content that degree is come suspension in the general sign liquid, can not make quantitative description to suspension in the liquid, thereby can not provide good foundation for processing and the use of liquid.
Summary of the invention
In view of this, the object of the present invention is to provide particle detection system in a kind of liquid, detect in order to size and quantity to particle in the liquid, thereby the purpose of quantitative description is made in realization to the particle in the liquid.
For achieving the above object, the invention provides particle detection system in a kind of liquid, be achieved in that specifically
Particle detection system in a kind of liquid comprises: liquid pretreatment unit and coupled circuit arrangement; Wherein, described liquid pretreatment unit comprises weir pipe and the laser particle physical prospecting head that is connected with described weir pipe, and described circuit arrangement comprises laser signal conditioning unit, PLD counter and the micro-control unit MCU that is connected successively;
Described weir pipe collection liquid sample, and the velocity of liquid assets of control liquid sample, particle in the described laser particle physical prospecting tracer liquid sample, generate corresponding detection signal and pass to described laser signal conditioning unit, concrete, described laser particle physical prospecting head comprises sample flow exchange device and the laser optical path that combines with described sample flow exchange device, described sample flow exchange device be shaped as slit-shaped, be used for passing through of control liquid sample particle, described laser optical path is regulated laser and is made laser generate corresponding detection signal by liquid sample, when having particle in the liquid sample, owing to blocking described laser, described particle causes described detection signal generation saltus step;
The more above-mentioned detection signal in described laser signal conditioning unit and the reference signal that presets, the particle diameter of count particles thing, and detection signal exported to the PLD counter, the quantity of described PLD counters count particle.
Preferably, described liquid pretreatment unit also comprises the filtrator that is arranged between described weir pipe and the described laser particle physical prospecting head, is used for the particle that filtering need not detect.
Preferably, described liquid pretreatment unit also comprise be arranged on before the described laser particle physical prospecting head except air bubble apparatus, be used for removing the bubble of liquid sample.
Preferably, described laser signal conditioning unit comprises: laser instrument, drive circuit for laser, laser detector, laser signal amplifying circuit and laser signal post-processed circuit;
Wherein, described laser instrument is used for emission laser; Described drive circuit for laser drives described laser instrument with firm power, and according to the detection signal of described laser particle physical prospecting head output power is adjusted; Described laser detector detects above-mentioned signal, and judges whether there is particle in the liquid sample; Described laser signal amplifying circuit amplifies detection signal, and provides and feed back signal to drive circuit for laser; Described laser signal post-processed circuit calculates the particle diameter of particle in the liquid sample by contrast detection signal and reference signal.
Preferably, described circuit arrangement also comprises the man-machine interaction unit by micro-control unit MCU control, the display device that described man-machine interaction unit comprises for the keyboard of information input and is used for showing.
Preferably, described circuit arrangement also comprises the pressure inverting unit, the pressure of described pressure inverting unit collection liquid sample, calculate the velocity of liquid assets of liquid according to the sectional area of the proportion of fluid sample and sample flow exchange device, and velocity of liquid assets fed back to micro-control unit MCU, MCU passes to man-machine interaction unit with velocity of liquid assets by micro-control unit, indicates adjusting to the weir pipe with this.
Preferably, described circuit arrangement also comprises communication unit, and described communication unit comprises be used to the data transmission module that carries out data transmission.
By technique scheme as can be known, compared with prior art, in the embodiment of the invention, for the liquid sample that collects, particle diameter and quantity by particle in the tracer liquid sample, characterize the degree that contains particle in the liquid, thereby reach the purpose that quantitative description is surveyed particle in the liquid, for the processing of liquid provides foundation.
Description of drawings
The structural representation of particle detection system in a kind of liquid that Fig. 1 provides for the embodiment of the invention;
The structural representation of a kind of liquid pretreatment unit that Fig. 2 provides for the embodiment of the invention;
The structural representation of the another kind of liquid pretreatment unit that Fig. 3 provides for the embodiment of the invention;
The structural representation of a kind of circuit arrangement that Fig. 4 provides for the embodiment of the invention;
The structural representation of the another kind of circuit arrangement that Fig. 5 provides for the embodiment of the invention;
The structural representation of the another kind of circuit arrangement that Fig. 6 provides for the embodiment of the invention;
The structural representation of a kind of laser particle physical prospecting head that Fig. 7 provides for the embodiment of the invention;
A kind of laser signal that Fig. 8 provides for the embodiment of the invention is nursed one's health the structural representation of unit;
The structural representation of particle detection system in the another kind of liquid that Fig. 9 provides for the embodiment of the invention.
Embodiment
Understand technical scheme of the present invention for those skilled in the art can be known, below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
See also Fig. 1, the structural representation of particle detection system in a kind of liquid that provides for the embodiment of the invention.This system comprises: liquid pretreatment unit 11 and coupled circuit arrangement 12; Wherein, described liquid pretreatment unit 11 comprises weir pipe 111 and the laser particle physical prospecting that is connected with described weir pipe 112, and described circuit arrangement 12 comprises power supply 121, micro-control unit MCU122, laser signal conditioning unit 123 and nurses one's health the PLD counter 124 that unit 123 is connected with described micro-control unit MCU122 with described laser signal.
When the particle in the liquid is detected, weir pipe 111 in the liquid pretreatment unit 11 is the collection liquid sample at first, and the velocity of liquid assets of regulator solution sample body, send liquid sample to laser particle physical prospecting 112 with certain speed, laser particle physical prospecting 112 makes laser generate detection signal by liquid sample and passes to laser signal conditioning unit 123 in the circuit arrangement 12; Under the power supply prerequisite of power supply 121, after the 123 pairs of detection signals that receive in laser signal conditioning unit detect and handle, by the detection signal after the comparison process and reference signal, calculate the particle diameter that obtains particle, and the detection signal after the output processing is given PLD counter 124, described PLD counter 124 is added up the quantity of the various detection signals of described laser signal conditioning unit 123 outputs under the control of micro-control unit MCU122.Because this system when particle detects in the liquid, can get access to particle diameter and the quantity of particle, thereby realize the quantitative description to particle in the liquid, for liquid handling provides foundation.
As shown in Figure 2, the structural representation of a kind of liquid pretreatment unit that provides for the embodiment of the invention.In the disclosed system of other embodiment, liquid pretreatment unit 21 comprise weir pipe 211, laser particle physical prospecting 212 and be arranged on weir pipe 211 and laser particle physical prospecting 212 between filtrator 213, wherein, the function of weir pipe 211 and laser particle physical prospecting 212 and above-mentioned weir pipe 111 and laser particle physical prospecting 112 is similar, 213 pairs of weirs of described filtrator pipe 211 liquid samples that collect filter, filtering out does not need the particle that detects, afterwards, passes to laser particle physical prospecting 212.
As shown in Figure 3, the structural representation of the another kind of liquid pretreatment unit that provides for the embodiment of the invention.In the system that other embodiment provide, liquid pretreatment unit 31 comprise weir pipe 311, laser particle physical prospecting 312, filtrator 313 and be arranged on filtrator 313 with laser particle physical prospecting 312 between remove air bubble apparatus 314, wherein the function of weir pipe 311, laser particle physical prospecting 312 and filtrator 313 and above-mentioned weir pipe 211, laser particle physical prospecting 212 and filtrator 213 is similar, described except the bubble that produces in the air bubble apparatus 314 removal liquid samples, thus prevent from causing flase drop to be surveyed owing to bubble enters the sample flow exchange device.
As shown in Figure 4, the structural representation of a kind of circuit arrangement that provides for the embodiment of the invention.In the disclosed system of other embodiment, circuit arrangement 41 comprises power supply 411, micro-control unit MCU412, laser signal conditioning unit 413, PLD counter 414 and the man-machine interaction unit 415 that is connected with micro-control unit MCU512, wherein, power supply 411, micro-control unit MCU412, laser signal conditioning unit 413 and PLD counter 414 and above-mentioned power supply 121, micro-control unit MCU122, the function of laser signal conditioning unit 123 and PLD counter 124 is similar, described man-machine interaction unit 415 comprises keyboard portion and display part (not shown), described keyboard portion can be carried out operations such as the setting of system and the switching of particle passage, and described display part shows the quantity of the particle of each passage, information such as flow and various warnings.
As shown in Figure 5, the structural representation of the another kind of circuit arrangement that provides for the embodiment of the invention.In the disclosed system of other embodiment, circuit arrangement 51 comprises the pressure inverting unit 516 that power supply 511, micro-control unit MCU512, laser signal conditioning unit 513, PLD counter 514, man-machine interaction unit 515 and output terminal are connected with micro-control unit MCU412 and are connected with liquid preprocessing part (not shown) with input end.Wherein, power supply 511, micro-control unit MCU512, laser signal conditioning unit 513, PLD counter 514 and man-machine interaction unit 515 and above-mentioned power supply 411, micro-control unit MCU412, laser signal conditioning unit 413, the function of PLD counter 414 and man-machine interaction unit 415 is similar, described pressure inverting unit 516 collects the pressure of liquid at liquid pretreatment unit place, according to the proportion of liquid and the sectional area of sample flow exchange device, extrapolate the current velocity of liquid assets of liquid sample, and current velocity of liquid assets fed back to micro-control unit MCU512, by micro-control unit MCU512 current velocity of liquid assets is passed to man-machine interaction unit 515, with this weir pipe (not shown) that need to indicate whether manual adjustments liquid pretreatment unit, cause velocity of liquid assets to reach preset value.Guarantee that thus liquid sample can circulate with certain speed in the sample flow exchange device.
As shown in Figure 6, the structural representation of the another kind of circuit arrangement that provides for the embodiment of the invention.In the disclosed system of other embodiment, circuit arrangement 61 comprises power supply 611, micro-control unit MCU612, laser signal conditioning unit 613, PLD counter 614, man-machine interaction unit 615, pressure inverting unit 616 and the communication unit 617 that is connected with micro-control unit MCU612.Wherein, power supply 611, micro-control unit MCU612, laser signal conditioning unit 613, PLD counter 614, man-machine interaction unit 615 and pressure inverting unit 616 are similar with the function of above-mentioned power supply 511, micro-control unit MCU512, laser signal conditioning unit 513, PLD counter 514, man-machine interaction unit 515 and pressure inverting unit 516, described communication unit 617 comprises the data transmission module (not shown), carries out the data transfer operation of native system and host computer and the calibration operation of data.Communication unit can also comprise support as the expansion module of the communication protocol of MODBUS and carry out the analog module that 4-20mA exports that its level can switch between RS232 and RS485.In other embodiment disclosed by the invention, communication unit can also provide multiple interfaces, such as RS-232, and RS422, RS485,4-20mA etc.
As shown in Figure 7, the structural representation of a kind of laser particle physical prospecting head that provides for the embodiment of the invention.In the system that the embodiment of the invention provides, laser particle physical prospecting 71 comprises sample flow exchange device 711 and the laser optical path 712 that combines with sample flow exchange device 711, described sample flow exchange device 711 can be controlled the quantity of passing through of particle in the liquid sample, to reach testing goal.Described laser optical path 712 is regulated by the laser of laser instrument (not shown) emission and is made laser form corresponding detection signal by liquid sample.
As shown in Figure 8, a kind of laser signal that provides for the embodiment of the invention is nursed one's health the structural representation of unit.In the disclosed system of the embodiment of the invention, laser signal conditioning unit 81 comprises: the laser instrument 811 of emission laser, the drive circuit for laser 812 that output terminal is connected with described laser instrument 811, the laser detector 813 that input end is connected with the output of liquid pretreatment unit (not shown), the laser signal post-processed circuit 815 that the laser signal amplifying circuit 814 that input end is connected with the output terminal of laser detector 813 and input end are connected with the output of laser signal amplifying circuit 814, another output terminal of described laser signal amplifying circuit 814 is connected with described drive circuit for laser 812.
Described drive circuit for laser 812 is with constant power drive laser instrument 811, and according to the detection signal that generates in the described liquid preprocessing part (not shown) power adjusted; The detection signal of 813 pairs of generations of described laser detector detects, and judges whether there is particle in the liquid sample, if do not have particle in the liquid sample, then laser detector 813 detected signals are constant; If have particle in the liquid sample, then cause the detected signal generation of laser detector saltus step owing to particle blocks laser; 814 pairs of detection signals of described laser signal amplifying circuit amplify, and provide and feed back signal to drive circuit for laser 812, whether the inside surface that this feedback signal can characterize the sample flow exchange device has dirt, when this feedback signal reaches a predetermined value, the dirt of interpret sample circulation device inside surface reaches maximum and limits the quantity of, then system sends warning, shows that the dirt of sample flow exchange device inside surface can influence the detection of particle in the liquid; Described laser signal post-processed circuit 815 is responsible for producing a series of reference signal, distinguishes the different of detection signal by the contrast detection signal with reference signal, by calculating the particle diameter of particle in the liquid sample.
As shown in Figure 9, the structural representation of particle detection system in the another kind of liquid that provides for the embodiment of the invention.This system comprises: liquid pretreatment unit 91 and coupled circuit arrangement 92; Wherein, described liquid pretreatment unit 91 comprises the weir pipe 911 that is connected successively, filtrator 913, except air bubble apparatus 914 and laser particle physical prospecting 912, described circuit arrangement 92 comprises power supply 921, micro-control unit MCU922, laser signal conditioning unit 923, PLD counter 924, man-machine interaction unit 925, pressure inverting unit 926 and communication unit 927, wherein, the function of the corresponding unit among Fig. 9 among each unit and above each figure is consistent, repeats no more.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. particle detection system in the liquid is characterized in that, comprising: liquid pretreatment unit and coupled circuit arrangement; Wherein, described liquid pretreatment unit comprises weir pipe and the laser particle physical prospecting head that is connected with described weir pipe, and described circuit arrangement comprises laser signal conditioning unit, PLD counter and the micro-control unit MCU that is connected successively;
Described weir pipe collection liquid sample, and the velocity of liquid assets of control liquid sample, particle in the described laser particle physical prospecting tracer liquid sample, generate corresponding detection signal and pass to described laser signal conditioning unit, concrete, described laser particle physical prospecting head comprises sample flow exchange device and the laser optical path that combines with described sample flow exchange device, described sample flow exchange device be shaped as slit-shaped, be used for passing through of control liquid sample particle, described laser optical path is regulated laser and is made laser generate corresponding detection signal by liquid sample, when having particle in the liquid sample, owing to blocking described laser, described particle causes described detection signal generation saltus step;
The more above-mentioned detection signal in described laser signal conditioning unit and the reference signal that presets, the particle diameter of count particles thing, and detection signal exported to the PLD counter, the quantity of described PLD counters count particle.
2. according to the described system of claim 1, it is characterized in that described liquid pretreatment unit also comprises the filtrator that is arranged between described weir pipe and the described laser particle physical prospecting head, is used for the particle that filtering need not detect.
3. according to claim 1 or 2 described systems, it is characterized in that, described liquid pretreatment unit also comprise be arranged on before the described laser particle physical prospecting head except air bubble apparatus, be used for removing the bubble of liquid sample.
4. according to the described system of claim 1, it is characterized in that described laser signal conditioning unit comprises: laser instrument, drive circuit for laser, laser detector, laser signal amplifying circuit and laser signal post-processed circuit;
Wherein, described laser instrument is used for emission laser; Described drive circuit for laser drives described laser instrument with firm power, and according to the detection signal of described laser particle physical prospecting head output power is adjusted; Described laser detector detects above-mentioned signal, and judges whether there is particle in the liquid sample; Described laser signal amplifying circuit amplifies detection signal, and provides and feed back signal to drive circuit for laser; Described laser signal post-processed circuit calculates the particle diameter of particle in the liquid sample by contrast detection signal and reference signal.
5. according to the described system of claim 1, it is characterized in that described circuit arrangement also comprises the man-machine interaction unit by micro-control unit MCU control, the display device that described man-machine interaction unit comprises for the keyboard of information input and is used for showing.
6. according to the described system of claim 5, it is characterized in that, described circuit arrangement also comprises the pressure inverting unit, the pressure of described pressure inverting unit collection liquid sample, calculate the velocity of liquid assets of liquid according to the sectional area of the proportion of fluid sample and sample flow exchange device, and velocity of liquid assets fed back to micro-control unit MCU, MCU passes to man-machine interaction unit with velocity of liquid assets by micro-control unit, indicates adjusting to the weir pipe with this.
7. according to the described system of claim 1, it is characterized in that described circuit arrangement also comprises communication unit, described communication unit comprises be used to the data transmission module that carries out data transmission.
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| CN 200910168180 CN102004070B (en) | 2009-09-01 | 2009-09-01 | Detection system of particles in liquid |
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| CN 200910168180 CN102004070B (en) | 2009-09-01 | 2009-09-01 | Detection system of particles in liquid |
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| CN102004070A CN102004070A (en) | 2011-04-06 |
| CN102004070B true CN102004070B (en) | 2013-08-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103115860B (en) * | 2013-02-06 | 2015-07-29 | 清华大学 | Micro-nano air-bubble observation system and method in porous medium |
| CN104201129B (en) * | 2014-09-01 | 2017-02-22 | 上海华力微电子有限公司 | Method for monitoring particles in cleaning device |
| TWI663002B (en) * | 2017-10-02 | 2019-06-21 | Central Taiwan University Of Science And Technology | Feedback-type aqueous cyclonic separation system |
| CN109470524B (en) * | 2019-01-14 | 2021-06-04 | 三峡大学 | Two-phase flow fluid sampler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864855A1 (en) * | 1997-03-10 | 1998-09-16 | Fuji Electric Co., Ltd. | Method and apparatus for measuring turbidity |
| CN1229157A (en) * | 1999-04-07 | 1999-09-22 | 中国计量科学研究院 | Instrument for measuring and controlling wood pulp concentration |
| CN1595111A (en) * | 2004-07-07 | 2005-03-16 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for measuring gas concentration based on light source modulation |
| CN2733333Y (en) * | 2004-10-12 | 2005-10-12 | 毛根海 | Small-sized self-circulating constant pressure water supply system |
| CN2906598Y (en) * | 2006-03-09 | 2007-05-30 | 苏州大学 | Mini-semiconductor laser dust particle counter |
-
2009
- 2009-09-01 CN CN 200910168180 patent/CN102004070B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0864855A1 (en) * | 1997-03-10 | 1998-09-16 | Fuji Electric Co., Ltd. | Method and apparatus for measuring turbidity |
| CN1229157A (en) * | 1999-04-07 | 1999-09-22 | 中国计量科学研究院 | Instrument for measuring and controlling wood pulp concentration |
| CN1595111A (en) * | 2004-07-07 | 2005-03-16 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for measuring gas concentration based on light source modulation |
| CN2733333Y (en) * | 2004-10-12 | 2005-10-12 | 毛根海 | Small-sized self-circulating constant pressure water supply system |
| CN2906598Y (en) * | 2006-03-09 | 2007-05-30 | 苏州大学 | Mini-semiconductor laser dust particle counter |
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