WO2000063660A2 - Apparatus for measurement of particle or droplet velocity - Google Patents
Apparatus for measurement of particle or droplet velocity Download PDFInfo
- Publication number
- WO2000063660A2 WO2000063660A2 PCT/US2000/010794 US0010794W WO0063660A2 WO 2000063660 A2 WO2000063660 A2 WO 2000063660A2 US 0010794 W US0010794 W US 0010794W WO 0063660 A2 WO0063660 A2 WO 0063660A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- along
- beams
- path
- paths
- droplet
- Prior art date
Links
- 239000002245 particle Substances 0.000 title description 5
- 238000005259 measurement Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000012780 transparent material Substances 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 239000004568 cement Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
-
- 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
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
- G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
-
- 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
- G01N2015/0023—Investigating dispersion of liquids
- G01N2015/0026—Investigating dispersion of liquids in gas, e.g. fog
-
- 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
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0294—Particle shape
Definitions
- the present invention is directed to an apparatus for the measurement of the shape
- droplet of a liquid such as a droplet of ink for an ink printer.
- this apparatus comprises a laser for generating
- a beam of light along a path.
- a photodetector for receiving
- path of the beam is means for projecting a droplet of a liquid through the sheet of the beam.
- the droplet passing through the beam of light varies the amount of light receiving by the
- One aspect of the present invention is an apparatus for measuring the velocity of a
- the apparatus includes means for generating and projecting a beam of light
- first path Along the first beam path is means for dividing the beam into two separate
- beams extending along separate second and third paths. Means is adjacent the two beams for
- Means is also provided to detect the
- Another aspect of the present invention is a beam divider which can be used in the
- the beam divider includes a body of a light
- the transparent material having two light receiving surfaces.
- the light receiving surfaces are at an
- the body also serves as a means for adjusting the angle with respect to each other and extend from a common point to form a V.
- the body also serves as a means for adjusting the angle with respect to each other and extend from a common point to form a V.
- Each of the light emitting surfaces is spaced from and parallel to a separate light receiving surface.
- Fig. 1 is a schematic drawing of a form of the apparatus of the present invention
- Fig. 2 is a schematic drawing of a preferred form of an apparatus of the present invention
- Fig. 3 is an enlarged showing of the circled portion of Fig. 2;
- Fig. 4 is a graph showing the electrical signals produced by the apparatus of Fig. 2;
- Fig. 5 is a graph showing the electrical signals produced by a variation of the apparatus shown in Fig. 2;
- Fig. 6 is a perspective view of the beam divider of the apparatus shown in Fig. 2;
- Fig. 7 is a top view of the beam divider shown in Fig. 6 showing the manner in which
- Fig. 8 is a top view of a modification of the beam divider of Fig. 6;
- Fig 9 is a sectional view along line 9-9 of Fig. 8.
- FIG. 1 a form of the apparatus of the present invention for
- measuring apparatus measuring the velocity of a drop of liquid is generally designated as 10.
- a laser 12 which is adapted to generated a beam of light and direct the beam along
- a path 14 Along the path 14 and in front of the laser 12 are a series of lenses and knife edges 16
- beam splitter 20 which divides the beam into two portions, one which extends along the path 22
- mirror 26 is along the path 24 and changes the direction of the portion of the beam extending
- phtotodetectors 30 and 32 are adapted to provide an electrical signal corresponding to the beam
- Adjacent the path 22 is a device 34 for generating and projecting a droplet of
- the device 34 is positioned so as to project
- the droplet of liquid will pass through the portion of the beam extending along
- the beam so as to change the amount of light received by each of the photodetectors 30 and 32.
- the apparatus 10 can be used to measure the velocity of a
- the apparatus 10 can also be used to determine the droplet of liquid, as well as the profile of the liquid.
- the apparatus 10 can also be used to determine the profile of the liquid.
- Apparatus 34 comprises a laser 36 which is adapted to generate and project a beam of light along a path 38.
- the laser is adapted to generate and project a beam of light along a path 38.
- a beam divider 40 the details of which
- the divider 40 divides the beam into two separate beams which are emitted from the divider 40 along two separate, spaced and parallel paths 42 and 44.
- a focusing lens system 46 which receives the beams and
- the beam paths 48 and 50 lie in the same plane. Along each of the
- beam paths 48 and 50 is a separate photodetector 52 and 54 respectively.
- photodetectors 50 and 52 and along their respective beam paths 46 and 48 is a collecting lens
- the masks 58 and collecting lenses 56 serves to confine the respective
- the droplet forming device 60 may be the head of an ink jet printer. In the operation of the
- the droplet of liquid passes first through the beam which extends along the beam
- the droplet passes through each beam, it disrupts part of the beam and thereby changes the
- the velocity of the droplet can be determined.
- the beam paths 48 and 50 where the droplet pass thereacross can be varied by moving the
- droplet forming device 60 along the beam paths 48 and 50, or by varying the structure of the
- FIG. 6 there is shown a perspective view of the beam divider 40. Beam
- divider 40 comprises a body 62 of an optically transparent material, such as glass.
- the body 62 of an optically transparent material, such as glass.
- the front surfaces 68 and 70 are arranged at an
- front surfaces 68 and 70 form a V.
- the body 62 also has an end surface 78 extending between the
- FIG. 7 there is shown the manner that the beam divider 40 operates.
- beam 82 having a width a is directed into the body 62 at the front surfaces 68 and 70.
- the width of the beam 82 is such that the beam 82 can be directed into the body 62 with a portion
- the beam 82 enters the body 62 along a portion of the font surface 70.
- the beam portions 84 and 86 flow through the body 62 to the back surfaces 74 and
- the beam divider 40 divides the single beam 82 into two separate beams 84 and
- front surfaces 68 and 70 determine the spacing between the emitted beams 84 and 86.
- the emitted beams 84 and 86 can be increased.
- the beam divider 40 is shown as
- the beam divider 40 provides the body 62 with more than two front surfaces and back surfaces, the beam divider 40
- the optical quality of the incident surfaces is very important to
- FIG. 8 and 9 there is shown a shown another form of the beam divider of the present invention, generally designated as 88, which can be more easily made with the
- the body is formed of two separate
- the body piece 90 has flat top and
- bottom surfaces 94 and 96 flat front and back surfaces 98 and 100, an outer end surface 102
- the body piece 92 has flat top and bottom surfaces 106
- the front surfaces 98 and 110 of the body portions 84 and 86 are at the desired angle.
- top plate 118 is placed on the aligned top surfaces 94 and 106 of the body pieces 90 and 92, and
- a bottom plate 120 is placed on he aligned bottom surfaces 96 and 108 of the body pieces 90
- top and bottom plates 118 and 120 are secured to the body pieces 90 and 92 with a
- a groove may
- the apparatus includes a laser for generating a beam of
- the beam is formed into the shape of a thin sheet.
- the beam is then divided into two separate beams which are guided along separate and parallel
- the beams may be directed into separate photodetectors or into a single photodetector.
- Means is provided along the path of one of the beams for generating the droplet
- the photodetector or photodetectors provide two
- the present invention also provides a beam divider which will divide a beam into two or more portions and eject the beams along separate and parallel paths.
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13032499P | 1999-04-21 | 1999-04-21 | |
US60/130,324 | 1999-04-21 | ||
US09/553,211 | 2000-04-20 | ||
US09/553,211 US6624434B1 (en) | 1999-04-21 | 2000-04-20 | Apparatus for measurement of particle or droplet velocity |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2000063660A2 true WO2000063660A2 (en) | 2000-10-26 |
WO2000063660A3 WO2000063660A3 (en) | 2001-03-08 |
WO2000063660A9 WO2000063660A9 (en) | 2001-07-26 |
Family
ID=26828374
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/010794 WO2000063660A2 (en) | 1999-04-21 | 2000-04-21 | Apparatus for measurement of particle or droplet velocity |
Country Status (2)
Country | Link |
---|---|
US (1) | US6624434B1 (en) |
WO (1) | WO2000063660A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107636472A (en) * | 2014-11-06 | 2018-01-26 | 基纽拜奥股份有限公司 | Drop velocity detects |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6897466B2 (en) * | 2001-07-19 | 2005-05-24 | Seiko Epson Corporation | Instrument and method for measuring ejection velocity of liquid |
US6858860B2 (en) * | 2001-07-24 | 2005-02-22 | Seiko Epson Corporation | Apparatus and method for measuring natural period of liquid |
DE10163463B9 (en) * | 2001-12-21 | 2008-07-17 | Osram Opto Semiconductors Gmbh | Apparatus and method for in situ measurement of polymer amounts printed on supports |
WO2014052137A1 (en) * | 2012-09-25 | 2014-04-03 | Kasthuri Perinkulam | Methods and apparatuses for measurement of liquids in motion |
DE202017006886U1 (en) | 2017-04-26 | 2018-10-17 | Jenoptik Industrial Metrology Germany Gmbh | contour measurer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5025438A (en) * | 1989-03-17 | 1991-06-18 | Ricoh Company, Ltd. | Recording and reproducing optical information device which converts the first beam into a second beam having different light intensity distribution |
US5339196A (en) * | 1990-09-27 | 1994-08-16 | Mesacon Gesellschaft Fur Messtechnik Mbh | Optical device for measuring the speed of a moved surface by means of a measuring light beam from a laser |
US5430306A (en) * | 1994-01-03 | 1995-07-04 | Hewlett-Packard Company | Optoelectronic detector with high, uniform sensitivity and large field of view, for thermal-inkjet inkdrops |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0333905A1 (en) * | 1988-03-25 | 1989-09-27 | Dietrich Dr. Dopheide | Laser Doppler anemometer (LDA) for measuring the velocity of moving objects |
US5074658A (en) * | 1989-07-31 | 1991-12-24 | Syracuse University | Laser capillary spectrophotometric acquisition of bivariate drop size and concentration data for liquid-liquid dispersion |
US5186057A (en) * | 1991-10-21 | 1993-02-16 | Everhart Howard R | Multi-beam liquid-drop size/rate detector apparatus |
DE4412494C2 (en) * | 1994-04-12 | 1997-02-27 | Kugelstrahlzentrum Aachen Gmbh | Method for measuring the speed distribution of a blasting medium flow |
US6153873A (en) * | 1998-05-20 | 2000-11-28 | E. I. Dupont De Numours And Company | Optical probe having an imaging apparatus |
US6016194A (en) * | 1998-07-10 | 2000-01-18 | Pacific Scientific Instruments Company | Particles counting apparatus and method having improved particle sizing resolution |
-
2000
- 2000-04-20 US US09/553,211 patent/US6624434B1/en not_active Expired - Fee Related
- 2000-04-21 WO PCT/US2000/010794 patent/WO2000063660A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5025438A (en) * | 1989-03-17 | 1991-06-18 | Ricoh Company, Ltd. | Recording and reproducing optical information device which converts the first beam into a second beam having different light intensity distribution |
US5339196A (en) * | 1990-09-27 | 1994-08-16 | Mesacon Gesellschaft Fur Messtechnik Mbh | Optical device for measuring the speed of a moved surface by means of a measuring light beam from a laser |
US5430306A (en) * | 1994-01-03 | 1995-07-04 | Hewlett-Packard Company | Optoelectronic detector with high, uniform sensitivity and large field of view, for thermal-inkjet inkdrops |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107636472A (en) * | 2014-11-06 | 2018-01-26 | 基纽拜奥股份有限公司 | Drop velocity detects |
EP3215855A4 (en) * | 2014-11-06 | 2018-03-28 | Bio-Rad Laboratories, Inc. | Droplet velocity detection |
US10215771B2 (en) | 2014-11-06 | 2019-02-26 | Bio-Rad Laboratories, Inc. | Droplet velocity detection |
CN107636472B (en) * | 2014-11-06 | 2020-09-15 | 基纽拜奥股份有限公司 | Droplet velocity detection |
US10962563B2 (en) | 2014-11-06 | 2021-03-30 | Bio-Rad Laboratories, Inc. | Droplet velocity detection |
Also Published As
Publication number | Publication date |
---|---|
US6624434B1 (en) | 2003-09-23 |
WO2000063660A9 (en) | 2001-07-26 |
WO2000063660A3 (en) | 2001-03-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2972205B1 (en) | Sorting flow cytometer | |
US4989977A (en) | Flow cytometry apparatus with improved light beam adjustment | |
EP3077790B1 (en) | Flow cytometer | |
US6323954B1 (en) | Process and device for the detection or determination of the position of edges | |
JPH0258585B2 (en) | ||
JP2004513348A (en) | Method for measuring the movement of a material sheet and an optical sensor for performing the method | |
KR950027420A (en) | Optical sensing device | |
CA1227946A (en) | Laser-doppler-anemometer | |
CN107894208B (en) | Spectrum confocal distance sensor | |
EP1102965B1 (en) | Apparatus and method for measurement of a liquid droplet | |
US6624434B1 (en) | Apparatus for measurement of particle or droplet velocity | |
US6677573B1 (en) | Laser sensor having a pinhole for particle measurement | |
EP0458275B1 (en) | Doppler velocimeter and apparatus using the same | |
JPH0452559A (en) | Velocity measuring apparatus using spatial filter | |
US4953979A (en) | Optical system for signal light detection in a flow particle analysis apparatus | |
US7012691B2 (en) | Optical moving information measuring apparatus and carrier system incorporating the same | |
US3966329A (en) | Precision optical beam divider and position detector | |
JPH04236307A (en) | Detecting device of three-dimensional shape of pattern | |
WO2007018794A1 (en) | Electromagnetic energy measurement apparatus and method | |
DE19707109C1 (en) | Optical vibrometer for measuring object oscillation in perpendicular directions | |
JPS5593003A (en) | Measuring method for plate thickness of plate-shape transparent body | |
JPH1137740A (en) | Damage detecting device for paper sheets | |
JPH1090158A (en) | Apparatus for measuring concentration and grain size of air-borne particles | |
EP0935244A3 (en) | Optical information detection apparatus | |
JPS6072473A (en) | Laser recorder |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): JP KR |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
AK | Designated states |
Kind code of ref document: A3 Designated state(s): JP KR |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
AK | Designated states |
Kind code of ref document: C2 Designated state(s): JP KR |
|
AL | Designated countries for regional patents |
Kind code of ref document: C2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
COP | Corrected version of pamphlet |
Free format text: PAGES 1/3-3/3, DRAWINGS, REPLACED BY NEW PAGES 1/3-3/3; DUE TO LATE TRANSMITTAL BY THE RECEIVING OFFICE |
|
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |