WO2004036208A2 - Procede et dispositif pour determiner la brillance de riz - Google Patents

Procede et dispositif pour determiner la brillance de riz Download PDF

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Publication number
WO2004036208A2
WO2004036208A2 PCT/CH2003/000669 CH0300669W WO2004036208A2 WO 2004036208 A2 WO2004036208 A2 WO 2004036208A2 CH 0300669 W CH0300669 W CH 0300669W WO 2004036208 A2 WO2004036208 A2 WO 2004036208A2
Authority
WO
WIPO (PCT)
Prior art keywords
rice
determining
gloss
sheen
shear stress
Prior art date
Application number
PCT/CH2003/000669
Other languages
German (de)
English (en)
Other versions
WO2004036208A3 (fr
Inventor
Frank-Otto Görlitz
Markus Brockfeld
Original Assignee
Bühler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bühler AG filed Critical Bühler AG
Priority to AU2003266905A priority Critical patent/AU2003266905A1/en
Priority to JP2004543891A priority patent/JP2006504081A/ja
Priority to EP03747787A priority patent/EP1552290A2/fr
Publication of WO2004036208A2 publication Critical patent/WO2004036208A2/fr
Publication of WO2004036208A3 publication Critical patent/WO2004036208A3/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/10—Starch-containing substances, e.g. dough
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/02—Measuring coefficient of friction between materials

Definitions

  • the invention relates to a method for determining the gloss of rice, in particular polished white rice, and it also relates to a device for determining the gloss of such rice.
  • EP-A-296956 discloses a glossy drawing device with which a comparison standard is to be created by comparison with a standard surface.
  • the gloss of any surface can be determined quickly by determining the luminance spectrum of the surface irradiated with light pulses and transforming it into electrical signals.
  • An assessment of the gloss of surfaces by determining the intensity of reflected light u.
  • the like disclose for example EP-A-183270, JP 56197959, WO 96/33401 or WO 01/20308. This can also be done with a NIR spectrometer (EP-A-240185).
  • This object is achieved with the features of patent claim 1.
  • a surprisingly simple determination of stick-slip effects of rice grains enables a comparative assessment of the gloss or smoothness of white rice, which enables manufacturers and consumers to evaluate the processing quality based on the gloss or smoothness of the grain surface. This can be achieved by introducing a shear stress into a certain amount of rice grains and determining stick-slip effects, in particular average values.
  • the invention is also based on the object of providing a device for assessing the gloss which is reliable, inexpensive and easy to handle. This object is achieved with the features of patent claim 6.
  • the device contains a very slow-running turntable, on which there is an annular channel into which rice can be filled. Evaluation electronics are also provided to record changes in torque, minimum and maximum values, interval times and to determine the resulting information for the gloss.
  • the device is based on the so-called ring shear cell, with which the shear forces of bulk goods can be determined in a measuring channel and subsequently displayed. With such ring shear cells, the level and the exact course of shear forces are determined, with the device according to the invention, however, only the time intervals between "shear force drops". These times are then used as parameters of the gloss, for example of a grain of grain.
  • Fig. 1 a measurement chart for a common white rice.
  • the device in a schematic representation and in two views (a, b)
  • the device consists of a turntable 1, on which an annular container 2 is placed.
  • the container 2 is equipped on the bottom with carrier bars 3.
  • a rice filling 4 In the container 2 there is a rice filling 4, which completely fills it.
  • the turntable 1 is driven via a (tooth) belt lift 5 by a geared motor 6, which has a high transmission ratio, so that the turntable 1 with the container 2 rotates only a few mm on the circumference per measurement process.
  • rotary plate 1 Opposite the rotary plate 1 is a counter plate 7 which can be opened from above via a hinge 9 and which is equipped with drivers on the underside.
  • the counter plate 7 can be pressed onto the rice surface by means of springs 8, a pressure plate 10 and a spindle 11 with a handle.
  • a catch 12 serves to lock the cover system 19.
  • the pressure plate 10 After closing the lid system 19, the pressure plate 10 can be moved with the spindle 11 in such a way that the springs 8 are pretensioned until a desired pressure of the pressure plate 10 is exerted on the rice surface. So that a pressure of the same size can be set for each measurement, there is a marking 14 on a spring bolt 13, which signals a certain preload when it is congruent with the surface of the pressure plate 10. The marking 14 is visible through a window 15.
  • the geared motor 6 is mounted rotatably about its drive axis in the housing 16 and is supported on a load cell 18 via a lever arm 17.
  • the bolt 20 serves as a driver for the container 2.
  • the preload could also be generated by means of compressed air if a pneumatic force element is installed between the cover and the counter plate 7 and the pre-pressure is set via a control valve. At a defined air pressure, the preload is always the same. The desired pressure can be displayed.
  • the container 2 is first filled flush with rice and placed on the turntable 1.
  • the lid 19 is closed and by means of the spindle 11 Form set on the rice surface.
  • the turntable 1 is slowly rotated and generates a reaction torque to the drive.
  • the sensor detects the reaction force of the geared motor 6 and the reaction time is evaluated.
  • reaction torque could also be tapped on the counter plate 7 and / or the pressure plate 10 with a force or torque sensor.
  • An evaluation electronics determines both minimum and maximum values and the time course as well as the interval course.
  • the turntable 1 rotates at very low speeds and after a lead time T2 of a few minutes there are stick-slip effects within the rice layer which cause changes in moments.
  • the time T1 for the entire measuring cycle can be set.
  • any drop below a predetermined minimum torque which can also be part of the measured maximum torque, is counted.
  • the measurement duration is divided by the determined number of events, which results in the average time of the stick-slip effects that is displayed. All you need is a counter and the specification of a lead time and a measurement time.
  • the invention is not limited to the embodiment shown.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Automation & Control Theory (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Cereal-Derived Products (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention concerne un procédé et un dispositif pour déterminer la brillance de riz, notamment de riz blanc, permettant une évaluation objective de la brillance ou de l'état de lissage de la surface de grains de riz. A cet effet, une contrainte de cisaillement est appliquée à une certaine quantité de riz, et les intervalles de temps (T3) d'effets d'adhérence-glissement sont déterminés, lesdits intervalles de temps étant représentatifs du degré de polissage ou de la brillance.
PCT/CH2003/000669 2002-10-17 2003-10-14 Procede et dispositif pour determiner la brillance de riz WO2004036208A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2003266905A AU2003266905A1 (en) 2002-10-17 2003-10-14 Method and device for determining the sheen of rice
JP2004543891A JP2006504081A (ja) 2002-10-17 2003-10-14 米の光沢を確定するための方法および装置
EP03747787A EP1552290A2 (fr) 2002-10-17 2003-10-14 Procede et dispositif pour determiner la brillance de riz

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10248566.6 2002-10-17
DE2002148566 DE10248566A1 (de) 2002-10-17 2002-10-17 Verfahren und Vorrichtung zur Bestimmung des Glanzes von Reis

Publications (2)

Publication Number Publication Date
WO2004036208A2 true WO2004036208A2 (fr) 2004-04-29
WO2004036208A3 WO2004036208A3 (fr) 2004-11-25

Family

ID=32049391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2003/000669 WO2004036208A2 (fr) 2002-10-17 2003-10-14 Procede et dispositif pour determiner la brillance de riz

Country Status (6)

Country Link
EP (1) EP1552290A2 (fr)
JP (1) JP2006504081A (fr)
CN (1) CN1705879A (fr)
AU (1) AU2003266905A1 (fr)
DE (1) DE10248566A1 (fr)
WO (1) WO2004036208A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240185A2 (fr) * 1986-03-20 1987-10-07 Satake Engineering Co., Ltd. Appareil pour l'estimation de la qualité de grains de riz
WO1996033401A1 (fr) * 1995-04-20 1996-10-24 Yissum Research Development Company Of The Hebrew University Of Jerusalem Luisancemetre

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05133883A (ja) * 1991-11-12 1993-05-28 Shizuoka Seiki Co Ltd 籾米の品質判定方法
JPH10160676A (ja) * 1996-11-27 1998-06-19 Matsushita Electric Works Ltd 米粒検査装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240185A2 (fr) * 1986-03-20 1987-10-07 Satake Engineering Co., Ltd. Appareil pour l'estimation de la qualité de grains de riz
WO1996033401A1 (fr) * 1995-04-20 1996-10-24 Yissum Research Development Company Of The Hebrew University Of Jerusalem Luisancemetre

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
A. D. BERMAN ET AL.: "Origin and Characterization of Different Stick-Slip Friction Mechanisms" LANGMUIR, AMERICAN CHEMICAL SOCIETY, Bd. 12, Nr. 19, 1996, Seiten 4559-4563, XP001090998 US *
D. SCHULZE: "Zeit- und geschwindigkeitsabh{ngiges Verhalten von Sch}ttg}tern als Bedingung f}r Slip-Stick" CHEMIE-INGENIEUR-TECHNIK, VERLAG CHEMIE GMBH, Bd. 75, Nr. 1-2, Februar 2003 (2003-02), Seiten 104-108, XP002297634 WEINHEIM, DE *
PATENT ABSTRACTS OF JAPAN Bd. 1998, Nr. 11, 30. September 1998 (1998-09-30) & JP 10 160676 A (MATSUSHITA ELECTRIC WORKS LTD), 19. Juni 1998 (1998-06-19) *
PATENT ABSTRACTS OF JAPAN Bd. 1999, Nr. 13, 30. November 1999 (1999-11-30) & JP 11 218488 A (SHIZUOKA SEIKI CO LTD), 10. August 1999 (1999-08-10) *
SCHULZE D: "ENTWICKLUNG UND ANWENDUNG EINES NEUARTIGEN RINGSCHERGERATES DEVELOPMENT AND APPLICATION OF A NOVEL RING SHEAR TESTER" AUFBEREITUNGS TECHNIK, VERLAG FUER AUFBEREITUNG SCHIRMER UND ZEH. WIESBADEN, DE, Bd. 35, Nr. 10, 1. Oktober 1994 (1994-10-01), Seiten 524-526,528, XP000471818 ISSN: 1443-9302 *
SCHULZE D: "ZUR FLIESSF[HIGKEIT VON SCH]TTG]TERN - DEFINITION UND MESSVERFAHREN" CHEMIE-INGENIEUR-TECHNIK, VERLAG CHEMIE GMBH. WEINHEIM, DE, Bd. 67, Nr. 1, 1995, Seiten 60-68, XP000485563 ISSN: 0009-286X *

Also Published As

Publication number Publication date
WO2004036208A3 (fr) 2004-11-25
CN1705879A (zh) 2005-12-07
DE10248566A1 (de) 2004-04-29
JP2006504081A (ja) 2006-02-02
EP1552290A2 (fr) 2005-07-13
AU2003266905A1 (en) 2004-05-04

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