CN2064498U - Instruments for measuring particle diameter by use of laser - Google Patents
Instruments for measuring particle diameter by use of laser Download PDFInfo
- Publication number
- CN2064498U CN2064498U CN 89215818 CN89215818U CN2064498U CN 2064498 U CN2064498 U CN 2064498U CN 89215818 CN89215818 CN 89215818 CN 89215818 U CN89215818 U CN 89215818U CN 2064498 U CN2064498 U CN 2064498U
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- laser
- ring
- lens
- instrument
- support
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- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to an instrument for measuring a particle diameter by use of laser, composed of a box body of a laser shot system, a He-Ne laser 2, a bivariate regulating supporter 3, a power supply of laser 4, a beam expander 5, a socket 6 of the instrument, a Fouri receiver lens 7, a lens seat 8, etc. The instrument of the utility model can be used for measuring industrial boilers, power boilers and the environment protecting system. The utility model has advantages of simple structure, low cost and convenient operation, which can measure fine particles with the minimum diameter of 5 micrometres and can obtain the measurement result rapidly and accurately.
Description
The utility model is a kind of surveying instrument of measuring the fine particle diameter.
For a long time, be Mechanical Method for the more common method of using of the measurement of fine particle, electric method, optical method, the method for these measurements exists all that measurement range is narrower, and speed is slow, the shortcoming of sampling trouble.
The purpose of this utility model is a kind of laser diffraction formula particle size measurer of development, can fast, accurately measure various grain sizes easily.This measuring instrument can be used for station boiler, the measurement of environment friendly system.
The technical solution of the utility model is: the laser particle size measurer is by laser transmitting system casing 1, H
e-N
eLaser instrument 2, two-dimensional adjustment support 3, Laser Power Devices 4, beam expander 5, instrument base 6, Rich Maurier receiver lens 7, lens mount 8, receiving system casing 9, support 10, encircle photodetector 11,16 channel amplifiers 12, A/D converter 13, microprocessor 14 more and form.H
e-N
e Laser instrument 2, Laser Power Devices 4, beam expander 5 place in the laser transmitting system casing 1, wherein H
e-N
eLaser instrument 2 is fixed on the two-dimensional adjustment support 3, and Fournier transform lens 7 are placed in the lens mount 8, encircles photodetector 11 more and is contained on the support 10, and support 10 and lens mount 8 are by being threaded, and they place in the receiving system casing 9 together.
The utility model embodiment is described in conjunction with the accompanying drawings.
Fig. 1 laser particle size measurer structural representation
Fig. 2 laser beam expander 5 structural representations
Fig. 3 encircles photodetector 11 synoptic diagram more
Fig. 4, the synoptic diagram of 16 channel amplifiers 12 and A/D converter 13
Fig. 5 measuring principle figure
As shown in Figure 1, the laser particle size measurer is by laser transmitting system casing 1, H
e-N
eLaser instrument 2, encircles photodetector 11,16 channel amplifiers 12, A/D converter 13, microprocessor 14 more and forms two-dimensional adjustment support 3, Laser Power Devices 4, beam expander 5, instrument base 6, Rich Maurier receiver lens 7, lens mount 8, receiving system casing 9.H
e-N
eLaser instrument 2, Laser Power Devices 4, expander 5 place in the laser transmitting system casing, wherein H
e-N
eLaser instrument 2 is fixed on the two-dimensional adjustment support 3, be convenient to the laser beam center and regulate up and down, Fournier transform lens 7 are placed in the lens mount 8, encircle photodetector 11 more and are contained on the support 10, support 10 and lens mount 8 are by being threaded, and they place in the receiving system casing 9 together.Wherein many ring photodetectors 11 can be adjusted by support 10 with respect to the axial location of Rich Maurier receiver lens, in case mix up, with ending a screw lock, laser transmitting system and receiving system independently are integral separately, usually be installed on the instrument base 6, be convenient to centering and adjust.When being used for dynamic test, can be with laser transmitting system, receiving system is installed in respectively on the support of both sides, tested flow field.
By shown in Figure 2, beam expander 5 is by compacting ring 17, lens actuators 18, trim ring 19, condenser 20, collimation microscope base 21, collimating mirror 22, trim ring 23, compacting ring 24, smallcolumn diaphragm 25 is formed, compacting ring 17 links to each other with lens actuators 18 screw threads, and lens actuators 18 and straight accurate microscope base 21 are connected by fine thread, and compacting ring 17 compresses trim ring 19 until withstanding condenser 20, compacting ring 24 compresses trim ring 23 until withstanding collimating mirror 22, H
e-N
eThe light that laser instrument 2 takes place incides on the convergent lens 20 of beam expander 5, and the focus of collimation lens 22 overlaps with the focus of convergent lens 20, is the directional light of a branch of 22mm through lens 22 outgoing again after laser scioptics 20 focus on.The focal length of lens is respectively f
1=5mm, f
2=76mm places the smallcolumn diaphragm 25 of a φ 10mm at the exit portal of beam expander 5, and making emergent light is the uniform directional light of a branch of light intensity.
By shown in Figure 3, encircle photodetector 11 more and be semi-circular, can form by 30-35 semi-ring, with the center pit is the center, and first external diameter is 0.15～0.20mm, along with the expansion of half garden ring, the spacing of interannular increases with 10～13% increase progressively gradually, encircles photodetector more and makes with silicon single crystal.Isolate mutually between many ring photodetector rings and the ring, its effect is that the diffraction light energy conversion that will drop on each ring is an electric signal, under the irradiation of light, just can produce electric current I s in the loop, this size of current is proportional to the luminous energy that drops on the corresponding ring of light, in case encircle photodetector 11 structures decides more, tested particle diameter scope depends on the focal length of Rich Maurier receiver lens 7, and its pass is:
D＝1.375λf／πs
D is tested particle diameter in the formula, and λ is an optical maser wavelength, and f is a Rich Maurier receiver lens focal length, and s is the ring radius.
Fig. 4 is the synoptic diagram of 16 channel amplifiers 12 and A/D conversion 13, and it is by 8 LM747 current amplifiers, 8 CM324 voltage amplifiers, and 4 CD4051,74LS273, LS138 voltage itinerant survey instrument and A/D converter is formed.Its principle of work is as follows: the photocurrent of leading the way by the collection of many rings photodetector is sent into 31 amplifiers respectively, each amplifier has two-stage, LM747 is a current amplifier, its enlargement factor is determined by adjustable resistance, the second level is voltage amplifier, adopt CM324, it has two effects, voltage amplification and phase inversion effect just are transformed into 31 groups of magnitudes of voltage through the photoelectric source after amplifying, and enter 4 CD4051 and 74LS273 respectively, the voltage itinerant detector that LS138 formed, owing to adopt a series of filtering circuit, can anti-effectively external interference, carry out the data bus that analog to digital conversion is input to microprocessor 14 by AD0804 again.
Fig. 5 is the measuring principle figure of laser particle size measurer.The light beam that is sent by laser instrument obtains the directional light of certain width behind beam expander 5, if passing the particle swarm of measurement zone 16, light beam make light beam produce diffraction, many rings photodetector 11 on the back focal plane that is positioned at Rich Maurier receiver lens 7 produces diffraction pattern, should output signals that encircle each ring on the detectors be proportional to the whole luminous energies that are radiated in this ring more, electric signal is handled by microprocessor 14 after the amplification analog to digital conversion of 16 channel amplifiers 12 and A/D converter 13, calculate by the program of finishing in advance, at last parameters such as the mean diameter of tested particle swarm and Size Distribution are shown or print.
The utility model has the advantages that simple in structurely, cost is low, and is easy to operate, and can obtain rapidly and accurately measurement result.
Claims (4)
1, a kind of laser grain is levied measuring instrument, it is characterized in that it is by laser transmitting system casing 1, He-Ne laser instrument 2, two-dimensional adjustment support 3, Laser Power Devices 4, beam expander 5, instrument base 6, Rich Maurier receiver lens 7, lens mount 8, receiving system casing 9, support 10, many ring photodetectors 11,16 channel amplifiers 12, A/D converter 13, microprocessor 14 is formed, He-Ne laser instrument 2, Laser Power Devices 4, beam expander 5 places in the laser transmitting system casing 1, wherein Ne-Ne laser instrument 2 is fixed on the two-dimensional adjustment support 3, Fournier transform lens 7 are placed in the lens mount 8, many ring photodetectors 11 are contained on the support 10, support 10 and lens mount 8 are by being threaded, and they place in the receiving system casing 9 together.
2, laser particle size measurer according to claim 1, be characterised in that very beam expander 5 is by compacting ring 17, lens actuators 18, trim ring 19, condenser 20, collimation microscope base 21, collimating mirror 22, trim ring 23, compacting ring 24, smallcolumn diaphragm 25 is formed, compacting ring 17 links to each other with lens actuators 18 screw threads, lens actuators 18 and straight accurate microscope base 21 connect by fine thread, and compacting ring 17 compresses trim ring 19 until withstanding condenser 20, and compacting ring 24 compresses trim ring 23 until withstanding collimating mirror 22.
3, laser particle size measurer according to claim 1, it is characterized in that many ring photodetectors 11 are semi-circular, can form by 30～35 semi-rings, with the center pit is the center, first external diameter is 0.15～0.20mm, along with the expansion of half garden ring, the spacing of interannular increases with 10～13% increase progressively gradually, encircles photodetector more and makes with silicon single crystal.
4, laser particle size measurer according to claim 1 is characterized in that 16 passages 12 by 8 LM747 current amplifiers, 8 LM324 voltage amplifiers, and 4 CD405174LS273, LS138 voltage itinerant detectors are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89215818 CN2064498U (en) | 1989-08-24 | 1989-08-24 | Instruments for measuring particle diameter by use of laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89215818 CN2064498U (en) | 1989-08-24 | 1989-08-24 | Instruments for measuring particle diameter by use of laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2064498U true CN2064498U (en) | 1990-10-24 |
Family
ID=4871339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89215818 Withdrawn CN2064498U (en) | 1989-08-24 | 1989-08-24 | Instruments for measuring particle diameter by use of laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2064498U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513664A (en) * | 2013-09-22 | 2014-01-15 | 济南大学 | Automatic centering system of sensor in hole measuring |
| CN108613902A (en) * | 2018-03-31 | 2018-10-02 | 江苏路求科技服务有限公司 | A kind of laser particle size analyzer device based on quartz products production |
| CN109855552A (en) * | 2019-03-16 | 2019-06-07 | 南京华群光电技术有限公司 | The two-way contactless Wire diameter measurer of one kind and method |
| CN110441200A (en) * | 2018-05-04 | 2019-11-12 | 长沙青波光电科技有限公司 | A kind of laser measuring device for measuring |
| CN110836693A (en) * | 2019-11-19 | 2020-02-25 | 中国科学院合肥物质科学研究院 | Method and device for measuring size and injection frequency of impurity shot |
-
1989
- 1989-08-24 CN CN 89215818 patent/CN2064498U/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513664A (en) * | 2013-09-22 | 2014-01-15 | 济南大学 | Automatic centering system of sensor in hole measuring |
| CN103513664B (en) * | 2013-09-22 | 2015-10-28 | 济南大学 | The automatic centering system of sensor in aperture measuring |
| CN108613902A (en) * | 2018-03-31 | 2018-10-02 | 江苏路求科技服务有限公司 | A kind of laser particle size analyzer device based on quartz products production |
| CN110441200A (en) * | 2018-05-04 | 2019-11-12 | 长沙青波光电科技有限公司 | A kind of laser measuring device for measuring |
| CN110441200B (en) * | 2018-05-04 | 2022-07-15 | 长沙青波光电科技有限公司 | Laser measuring device |
| CN109855552A (en) * | 2019-03-16 | 2019-06-07 | 南京华群光电技术有限公司 | The two-way contactless Wire diameter measurer of one kind and method |
| CN110836693A (en) * | 2019-11-19 | 2020-02-25 | 中国科学院合肥物质科学研究院 | Method and device for measuring size and injection frequency of impurity shot |
| CN110836693B (en) * | 2019-11-19 | 2021-08-13 | 中国科学院合肥物质科学研究院 | Method and device for measuring size and injection frequency of impurity shot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |