CN1105450A - Particle measuring method and particle detecting sensor thereof - Google Patents
Particle measuring method and particle detecting sensor thereof Download PDFInfo
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- CN1105450A CN1105450A CN 94111609 CN94111609A CN1105450A CN 1105450 A CN1105450 A CN 1105450A CN 94111609 CN94111609 CN 94111609 CN 94111609 A CN94111609 A CN 94111609A CN 1105450 A CN1105450 A CN 1105450A
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Abstract
The method suitable for automatic measurement of solid particles in liquid uses liquid pipe with long slit to increase cross section of liquid channel, so avoiding the channel being blocked by big particles. A CCD camera with electronic shutter is used for the measurement by means of video image, so having high precision and analysis flexibility. The image may also be recorded with videocorder for later analysis.
Description
The present invention is a kind of particle measuring method and particle detecting sensor thereof, belong to improvement to the method for automatic measurement and the acquisition sensor thereof of solids in the liquid, relate to liquid particle and projected on the photosurface by illumination, go out the size of particle according to the input of photoreceiver output.
Existing particle measuring method is to adopt the luminous energy probe method, particle detector adopts tubule fluid passage (2) as shown in Figure 1, photoelectric tube (4) is as photoreceiver, light source (1) shines on the photoelectric tube (4), logical light detecting area between light source (1) and photoelectric tube (4), when particle (3) is arranged in the liquid by detecting area (1), particle will interdict light beam, make photoelectric tube output reduce to form negative pulse, its amplitude is proportional to the projected area of particle and the ratio of the logical light area of detecting area.Because logical light area is changeless, just can measure the size of particle according to the photoelectric tube amplitude output signal.The deficiency that this measuring method and acquisition sensor thereof exist:
As shown in Figure 2: logical light face size and photosurface consistent size, area is a * b, the fluid passage sectional area is c * d.In order to guarantee the particle of responsive each detecting area of photoreceiver energy, require logical light face must comprise the range of size of the particle of surveying, fluid passage width d should be consistent with logical optical width b, i.e. d=b.Aisle spare is little, helps improving the sensitivity of particle measurement, but can occur that particle stops up fluid passage and situation about can't work; If logical light area increase can cause the decline of small-particle being measured sensitivity, have a strong impact on the particle measurement precision.Because the signal amplitude of photoelectric tube output is the numerical value that is directly proportional with the particle projecting plane, so the particle diameter that calculates can only be the equivalent diameter of particle.In the particle measurement process, can not monitor and write down the image of particle.
The objective of the invention is to avoid above-mentioned the deficiencies in the prior art and provide a kind of area array CCD of heavy in section fluid passage and charged sub-shutter that adopts to make photoreceiver, absorb particle method for automatic measurement and the particle detecting sensor thereof of transient state particle picture realization automatic measurement of particle size and record demonstration thereby gather.
Purpose of the present invention can reach by following measure: the particle method for automatic measurement, adopt the solids in the liquid projected on the photosurface of photoreceiver by illumination, size according to the input particle of photoreceiver output, it is characterized in that tested particle enters logical light detecting area with liquid through slit liquid siphunculus, transient state particle target resembles through optical loupes in the motion, gather imaging on the photosurface of the area array CCD of video camera by electronic shutter control, the machine image processing as calculated of its output signal is according to the position of target pixel, area calculates and demonstrates the big or small result of particle automatically.
Purpose of the present invention can also reach by following measure: particle detecting sensor, adopt slit liquid siphunculus, the fluid passage sectional area of its logical light detecting area is a slit-shaped, by of the transient state sampling of electronic shutter control Array CCD Camera to particle picture in the liquid, and output signal to the computer image treatment device, optical loupes arranged before the Array CCD Camera.
Purpose of the present invention can also reach by following measure: the slit length of slit liquid siphunculus is 1～5 millimeter, and the slit spacing of slit is 0.1～0.5 millimeter.The speed of electronic shutter is 1/500 second～1/10000 second.
Description of drawings:
Fig. 1 is the schematic diagram of related background art of the present invention;
Fig. 2 is the acquisition sensor structural drawing of related background art of the present invention;
Fig. 3 is a schematic diagram of the present invention;
Fig. 4 is an acquisition sensor structural drawing of the present invention
The present invention is further detailed in conjunction with the accompanying drawings below:
As shown in Figure 3: adopt collimated light source (5), its light beam is vertical with the long narrow-gap channel of slit liquid siphunculus (6), make the illumination of whole detecting area (12) even, when tested particle (7) passes through detecting area (12) with liquid, its particle target resembles through optical loupes (8) amplifies, be imaged on the photosurface (10) of area array CCD of camera (9), by electronic shutter control break CCD optical-integral-time, can gather the transient state particle image that absorbs in flowing, the output image signal of its CCD is through computing machine (11) image processing of routine, carry out opto-electronic conversion and signal Processing and multiple goal and handle, according to the position of particle target pixel, area calculates and writes down the big or small result who demonstrates particle automatically.
As shown in Figure 4: the slit length b=2 millimeter of liquid siphunculus, the crack spacing of slit is 0.2 millimeter, the speed of electronic shutter is 1/800s.
The present invention compares prior art and has following advantage:
1, adopts long slit liquid siphunculus, whole fluid passage cross section is increased. Even be mixed with a small amount of macroparticle in the liquid, also be unlikely the circulation that affects liquid, solved the problem of macroparticle obstruction fluid passage.
2, adopted the Array CCD Camera of having electronic shutter, the size with TV image mensuration measurement particle has the certainty of measurement height, the characteristics that the grain size analysis flexibility is big. Not only the available equivalents circule method is calculated particle diameter, and also available maximum diameter method is calculated particle diameter etc.
3, in the measuring process, can monitor particle image, by external video recording camera, ex-post analysis be convenient in the file of also can recording a video.
Adopt the above particle measuring method of the present invention and particle detecting sensor, but, realize the automatic measurement of solids in the liquid multi-functionally with regard to high precision.
Claims (4)
1, a kind of particle method for automatic measurement, solids in the liquid are projected on the photosurface of photoreceiver by illumination, size according to the input particle of photoreceiver output, it is characterized in that tested particle (7) enters logical light detecting area (12) with liquid through slit liquid siphunculus (6), transient state particle target resembles through optical loupes (8) in the motion, gather imaging on the photosurface (10) of the area array CCD of video camera (9) by electronic shutter control, its output signal machine image processing as calculated (11) is according to the position of intended particle pixel, area calculates and demonstrates the big or small result of particle automatically.
2, a kind of particle detecting sensor, form by fluid passage and logical light detecting area and photoreceiver, it is characterized in that adopting slit liquid siphunculus (6), the fluid passage sectional area of its logical light detecting area (12) is a slit-shaped, by the transient state sampling of electronic shutter control Array CCD Camera (9) to particle picture, and export to the signal of computer image processor, optical loupes (8) is arranged before the Array CCD Camera.
3, particle detecting sensor as claimed in claim 2, the slit length that it is characterized in that slit liquid siphunculus (6) is 1～5 millimeter, the slit spacing of slit is 0.1～0.5 millimeter.
4, as claim 2 or 3 described particle detecting sensors, the speed that it is characterized in that electronic shutter is 1/500 second～1/10000 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111609A CN1036093C (en) | 1994-01-14 | 1994-01-14 | Particle measuring method and particle detecting sensor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111609A CN1036093C (en) | 1994-01-14 | 1994-01-14 | Particle measuring method and particle detecting sensor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1105450A true CN1105450A (en) | 1995-07-19 |
| CN1036093C CN1036093C (en) | 1997-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94111609A Expired - Fee Related CN1036093C (en) | 1994-01-14 | 1994-01-14 | Particle measuring method and particle detecting sensor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1036093C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447536C (en) * | 2004-02-12 | 2008-12-31 | 上海大学 | Liquid drop measuring method and device |
| CN102213669A (en) * | 2011-03-17 | 2011-10-12 | 上海理工大学 | Device and method for measuring granularity of dynamic light scattering nano particles of image |
| CN102841041A (en) * | 2012-08-24 | 2012-12-26 | 洛阳兰迪玻璃机器股份有限公司 | Method and system for detecting support particles by using visual imaging technology |
| CN101802589B (en) * | 2008-10-21 | 2013-01-23 | 北斗电子工业株式会社 | Method and device for detecting size of particle in liquid |
| CN103868828A (en) * | 2014-04-01 | 2014-06-18 | 深圳市芯通信息科技有限公司 | Dust detection device based on mobile terminal |
| CN104568761A (en) * | 2014-12-25 | 2015-04-29 | 苏州优谱德精密仪器科技有限公司 | Photoelectric detection device |
| CN108931807A (en) * | 2018-07-24 | 2018-12-04 | 北京大学 | The method of sampling, system and the equipment of space exploration particle variable sampling aperture time |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3102935B2 (en) * | 1991-11-20 | 2000-10-23 | シスメックス株式会社 | Imaging flow cytometer |
| EP0556971B1 (en) * | 1992-02-18 | 1999-12-08 | Hitachi, Ltd. | An apparatus for investigating particles in a fluid, and a method of operation thereof |
| DE69321748T2 (en) * | 1992-02-20 | 1999-06-17 | Canon Kk | Method and measuring apparatus for handling particles |
-
1994
- 1994-01-14 CN CN94111609A patent/CN1036093C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447536C (en) * | 2004-02-12 | 2008-12-31 | 上海大学 | Liquid drop measuring method and device |
| CN101802589B (en) * | 2008-10-21 | 2013-01-23 | 北斗电子工业株式会社 | Method and device for detecting size of particle in liquid |
| CN102213669A (en) * | 2011-03-17 | 2011-10-12 | 上海理工大学 | Device and method for measuring granularity of dynamic light scattering nano particles of image |
| CN102841041A (en) * | 2012-08-24 | 2012-12-26 | 洛阳兰迪玻璃机器股份有限公司 | Method and system for detecting support particles by using visual imaging technology |
| CN102841041B (en) * | 2012-08-24 | 2015-10-28 | 洛阳兰迪玻璃机器股份有限公司 | View-based access control model imaging technique detects the method and system of stilt particle |
| CN103868828A (en) * | 2014-04-01 | 2014-06-18 | 深圳市芯通信息科技有限公司 | Dust detection device based on mobile terminal |
| CN104568761A (en) * | 2014-12-25 | 2015-04-29 | 苏州优谱德精密仪器科技有限公司 | Photoelectric detection device |
| CN108931807A (en) * | 2018-07-24 | 2018-12-04 | 北京大学 | The method of sampling, system and the equipment of space exploration particle variable sampling aperture time |
| CN108931807B (en) * | 2018-07-24 | 2019-09-27 | 北京大学 | The method of sampling, system and the equipment of space exploration particle variable sampling aperture time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1036093C (en) | 1997-10-08 |
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