CS235212B1 - Probe of ultrasonic viscosimeter with torsional resonator - Google Patents

Probe of ultrasonic viscosimeter with torsional resonator Download PDF

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Publication number
CS235212B1
CS235212B1 CS813829A CS382981A CS235212B1 CS 235212 B1 CS235212 B1 CS 235212B1 CS 813829 A CS813829 A CS 813829A CS 382981 A CS382981 A CS 382981A CS 235212 B1 CS235212 B1 CS 235212B1
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CS
Czechoslovakia
Prior art keywords
torsion
torsion bar
housing
rod
coil
Prior art date
Application number
CS813829A
Other languages
Czech (cs)
Slovak (sk)
Inventor
Zdenko Figura
Samuel Pavlik
Vlastimil Zamecnik
Original Assignee
Zdenko Figura
Samuel Pavlik
Vlastimil Zamecnik
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 Zdenko Figura, Samuel Pavlik, Vlastimil Zamecnik filed Critical Zdenko Figura
Priority to CS813829A priority Critical patent/CS235212B1/en
Priority to DE19823201724 priority patent/DE3201724A1/en
Priority to IT19396/82A priority patent/IT1149537B/en
Priority to JP57021365A priority patent/JPS57196133A/en
Priority to FR8208957A priority patent/FR2506457A1/en
Priority to GB8215195A priority patent/GB2099998A/en
Priority to SE8203243A priority patent/SE8203243L/en
Publication of CS235212B1 publication Critical patent/CS235212B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
    • G01N11/16—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring damping effect upon oscillatory body
    • G01N11/162—Oscillations being torsional, e.g. produced by rotating bodies

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  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

In an ultrasonic viscosimeter utilizing a torsion resonator, a torsion rod (1) is fixed to a housing (5) in a nodal plane (2) and passes at nodal plane (3) through a pick-up coil (4). The housing (5) is electrically connected by conductor (6) to the upper end (7) of the torsion rod (1). An excitation transformer (8) has a primary winding in the form of a toroidal coil and a secondary winding formed by the housing (5) and torsion rod (1) so that when a current passes through rod (1), the resultant field causes the rod to twist. Damping of the torsion oscillations when the lower end of the rod is immersed in a liquid gives an indication of the viscosity of the liquid. <IMAGE>

Description

Vynález sa týká sondy ultrazvukového vis| kozimetra s torzným rezonátorom budeným k torzným kmitom toroidnou cievkou.The present invention relates to an ultrasonic probe with a torsion resonator driven to the torsional oscillation by a toroidal coil.

Doteraz známe ' ultrazvukové torzné rezonátory pre kontinuálně meranie viskozity pozostávajú z polvlnového rezonátora, ktorý je v střede upevněný tak, že jeden vol'ný koniec je v styku s meranou kvapalinou a druhý slúži na budeme a snímanie kmitov rezonátora. Ďalšie riešenie spočívá v upevnění torzného rezonátora v dvoch uzlových rovinách, ktorého jedna koncová část sa ponára do meranej kvapaliny a na druhej koncovej časti sa snímajú torzné kmity. Iný torzný rezonátor má dížku rovnu polvlne alebo násobku polvlny torzných kmitov v danom materiáli, je · upevněný v jednom uzle a budený tangenciálně upevněným ultrazvukovým pozdížne kmitajúcim meničom v kmitni, pričom snímací měnič je taktiež tangeciálne upevněný a · posunutý o 180° oproti budiacemu měničů.The prior art ultrasonic torsion resonators for continuous viscosity measurement consist of a half-wave resonator which is fixed in the center so that one free end is in contact with the liquid to be measured and the other serves to sense the resonator oscillations. Another solution consists in fixing the torsion resonator in two nodal planes, one end part of which is immersed in the measured liquid and torsional oscillations at the other end part. Another torsion resonator has a length equal to the half or multiple of the torsional oscillations in the material, is fixed in one node and excited by a tangentially mounted ultrasonic longitudinally oscillating transducer in oscillation, the transducer also being tangentially fixed and offset by 180 °.

Nevýhodou uvedených riešení je relativné nízké výstupné napatie na snímacej cievke v důsledku snímania torzných kmitov mimo uzlovej roviny.A disadvantage of said solutions is the relatively low output voltage on the sensing coil due to sensing torsional oscillations outside the nodal plane.

Technický problém rieši a uvedené nevýhody odstraňuje sonda ultrazvukového viskozimetra- s· torzným- rezonátorom pozostávajúcm z torznej tyče o dížke 1 = —щ kde n je celé kladné^ číslo, pre ktoré platí η > 1 a λ je vlnová dížka torznej vlny šíriacej sa v torznej tyči, prechádzajúcej snímacou cievkou a toroidnou cievkou tvoriacou primárné vinutie budiaceho transformátora, ktorého sekundárné vinutie je tvořené puzdrom a samotnou torznou týčou, ktorá je upevněná v jednej uzlovej rovině k puzdru a ktorej časť prechádzajúca snímacou cievkou je z magnetostrikčného materiálu podlá tohoto vynálezu, ktorého podstatou je, že torzná tyč v mieste n uzlovej roviny prechádza cez snímaciu cievku, pričom puzdro je vodičom elektricky vodivo připojené v mieste pozdížnej osi k hornému konců torznej tyče.The technical problem is solved and mentioned disadvantages are eliminated ultrasound probe with viskozimetra- · torzným- resonator pozostávaj account cm of torsion eo The length e 1 = -щ where n is a positive number ^, which benefit η> 1 and λ is the wavelength torsional wave propagating in the torsion bar, passing through the sensing coil and toroidal coil forming the primary winding of the excitation transformer, the secondary winding of which is formed by the housing and the torsion bar itself, which is fixed in one nodal plane to the housing and The invention is based on the principle that the torsion bar at the n-node plane passes through the sensing coil, the housing being electrically conductively connected at the longitudinal axis to the upper ends of the torsion bar.

Podstatou je tiež to, že snímacia cievka je připojená cez primárné vinutie oddelOvacieho transformátora na prúdový magnetizačný zdroj.The essence is also that the sensing coil is connected via the primary winding of the decoupling transformer to a current magnetization source.

Použitím sondy ultrazvukového viskozimetra s torzným rezonátorom podl'a vynálezu sa dosiahne snímanie torzných kmitov v oblasti uzlovej roviny, čím sa niekol'konásobne zvýši napatie na snímacej cievke oproti iným častlam torzného rezonátora a použitím magnetostrikčného materiálu pre torznú tyč len v mieste jej přechodu snímacou cievkou sa dosiahne úspory špeciálneho magnetostrikčného materiálu.By using an ultrasonic viscometer probe with a torsion resonator according to the invention, torsional oscillation is obtained in the nodal region, thereby increasing the sensing coil voltage several times over other parts of the torsion resonator and using magnetostrictive material for the torsion bar only at the transducer coil transition. savings of special magnetostrictive material are achieved.

Na pripojenom výkrese je znázorněné v řeze příkladné prevedenie sondy ultrazvukového viskozimetra s torzným rezonátorom.The attached drawing shows a cross-section of an exemplary embodiment of a torsion resonator ultrasonic viscometer probe.

Sonda ultrazvukového viskozimetra s torzným rezonátorom pozostáva z kmitajúcej torznej tyče 1 o dížke 1 = ——— . n, kde n je celé kladné číslo, pre ktoré platí η > 1 a λ je vlnová dížka torznej vlny širiacej sa v torznej tyči. Torzná tyč 1 je zložená z různých materiálov. V mieste prvej uzlovej roviny 2 je spojená s puzdrom 5, v mieste n uzlovej roviny 3, kde prechádza cez snímaciu cievku 4 je časť torznej tyče 1 z magnetostrikčného materiálu. Torzná tyč 1 spolu s puzdrom 5 a vodičom 6 tvoria sekundárný závit budiaceho transformátora 8. Puzdro 5 je elektricky vodivo připojené v mieste pozdížnej osi k hornému konců 7 torznej tyče 1. Snímacia cievka 4 je připojená cez primárné vinutie oddefovacieho transformátora 9 na prúdový magnetizačný zdroj 10.The ultrasonic viscometer probe with a torsion resonator consists of an oscillating torsion bar 1 having a length of 1 = ———. n, where n is an integer positive integer for which η> 1 and λ is the wavelength of the torsion wave propagating in the torsion bar. The torsion bar 1 is composed of different materials. At the point of the first nodal plane 2 it is connected to the housing 5, at the point n of the nodal plane 3 where it passes through the sensing coil 4 is a part of the torsion bar 1 made of magnetostrictive material. The torsion bar 1 together with the housing 5 and the conductor 6 form the secondary thread of the excitation transformer 8. The housing 5 is electrically conductively connected at the longitudinal axis to the upper ends 7 of the torsion bar 1. The sensing coil 4 is connected through the primary winding of the decoupling transformer 9 to the current 10th

Jednosměrným, alebo vysokofrekvenčným impulzom sa cez budiaci transformátor 8 vybudí prúdový vysokofrekvenčný impulz v torznej tyči 1. Při přechode prúdu časťou z magnetostrikčného materiálu dochádza vplyvom kruhového magnetického pol'a k vychýleniu torznej tyče 1 následkom magnetostrikcie. Po skončení budiaceho impulzu torzná tyč 1 dokmitáva na vlastnej rezonančnej frekvencii a tieto kmity sa snímajú snímacou cievkou 4 v oblasti uzlovej roviny 3, kde vzniká najvSčšíe napatie v materiáli a súčasne dochádza k najváčšej zmene magnetostrikcie v důsledku interakcie s pozdížnym magnetickým pol'om snímacej cievky 4 vybudený prúdom z prúdového· magnetizačného zdroja 10. Striedavé napatie na snímacej cievke 4 je úměrné amplitúde torzných kmitov torznej tyče 1. Při ponoření časti rezonátora, ktorá vyčnieva z puzdra 5 do meranej kvapaliny nastáva zatlmenie kmitov, zodpovedajúce velkosti súčinu viskozity a hustoty kvapaliny. Oddělovací transformátor 9 slúži k oddeleniu striedavého signálu zo snímacej cievky 4 a magnetizačného prúdu z prúdového magnetizačného zdroja 10.The current radio frequency pulse in the torsion bar 1 is excited via a unidirectional or high-frequency pulse through the excitation transformer 8. Upon passing the current through a part of the magnetostrictive material, the torsion bar 1 is deflected due to magnetostriction. At the end of the excitation pulse, the torsion bar 1 oscillates at its own resonant frequency and these oscillations are sensed by the sensing coil 4 in the region of the nodal plane 3, where the greatest stress in the material occurs and at the same time the greatest change in magnetostriction due to interaction with the magnetic field of the sensing coil. The alternating voltage on the sensor coil 4 is proportional to the amplitude of the torsional oscillations of the torsion bar 1. When the part of the resonator that protrudes from the housing 5 into the liquid to be measured, the damping of the oscillations corresponding to the product of viscosity and liquid density occurs. The isolation transformer 9 serves to separate the alternating signal from the sensing coil 4 and the magnetization current from the current magnetization source 10.

Claims (2)

1. Sonda ultrazvukového viskozimetre s torzným rezonátorom pozostávajúcim z torznej tyče o dlžke 1 = —|. n, prechádzajúcej snímacou cievkou a toroidnou cievkou tvoriacou primárné vinutie budiaceho transformátora, ktorého sekundárné vinutie je tvořené puzdrom a samotnou torznou týčou, ktorá je upevněná v jednej uzlovej rovině к puzdru a ktorej část prechádzajúca snímacou cievkou je z magnetostrikčného mate riálu, vyznačujůca sa tým, že torzná tyč (1) v mieste n uzlovej roviny (3) prechádza cez snímaciu cievku (4), pričom puzdro (5) je vodičom (6) elektricky vodivo připojené v mieste pozdížnej osi к hornému konců (7) torznej tyče (1),1. Ultrasonic viscometer probe with a torsion resonator consisting of a torsion bar of length 1 = - | n, passing through the sensor coil and the toroidal coil forming the primary winding of the excitation transformer, the secondary winding being formed by the housing and the torsion bar itself, which is fixed in one nodal plane to the housing and whose part passing through the sensor coil is of magnetostrictive material; that the torsion bar (1) at n-node plane (3) passes through the pick-up coil (4), the sleeve (5) being electrically conductively connected at the longitudinal axis to the upper ends (7) of the torsion bar (1) . 2. Sonda podlá bodu 1, vyznačujůca sa tým, že snímacia cievka (4) je připojená cez primárné vinutie oddelovacieho transformátora (9) na prúdový magnetizačný zdroj (10).2. The probe according to claim 1, characterized in that the sensor coil (4) is connected via a primary winding of the isolation transformer (9) to the current magnetization source (10).
CS813829A 1981-05-25 1981-05-25 Probe of ultrasonic viscosimeter with torsional resonator CS235212B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CS813829A CS235212B1 (en) 1981-05-25 1981-05-25 Probe of ultrasonic viscosimeter with torsional resonator
DE19823201724 DE3201724A1 (en) 1981-05-25 1982-01-21 PROBE FOR AN ULTRASONIC VISCOSIMETER WITH TORSION RESONATOR
IT19396/82A IT1149537B (en) 1981-05-25 1982-02-02 PROBE FOR AN ULTRASONIC VISCOSIMETER WITH TORSIONAL RESONATOR
JP57021365A JPS57196133A (en) 1981-05-25 1982-02-15 Probe for ultrasonic viscometer with torsion vibrator
FR8208957A FR2506457A1 (en) 1981-05-25 1982-05-24 PROBE FOR AN ULTRASONIC VISCOSIMETER WITH A TORSION RESONATOR
GB8215195A GB2099998A (en) 1981-05-25 1982-05-25 Ultrasonic viscosimeters
SE8203243A SE8203243L (en) 1981-05-25 1982-05-25 PROBLEM FOR ULTRASONIC VISCOSIMETS WITH TORSION RESONATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS813829A CS235212B1 (en) 1981-05-25 1981-05-25 Probe of ultrasonic viscosimeter with torsional resonator

Publications (1)

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CS235212B1 true CS235212B1 (en) 1985-05-15

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CS813829A CS235212B1 (en) 1981-05-25 1981-05-25 Probe of ultrasonic viscosimeter with torsional resonator

Country Status (7)

Country Link
JP (1) JPS57196133A (en)
CS (1) CS235212B1 (en)
DE (1) DE3201724A1 (en)
FR (1) FR2506457A1 (en)
GB (1) GB2099998A (en)
IT (1) IT1149537B (en)
SE (1) SE8203243L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE454915B (en) * 1986-10-27 1988-06-06 Leif Rune Bohlin ITEMS FOR INCLUDE IN A SUBJECT TO CHECK ITS VISCOSITY
JP2768893B2 (en) * 1993-09-06 1998-06-25 山一電機株式会社 Resonant type test equipment
GB2354666B (en) * 1997-01-10 2001-06-27 Rolls Royce Plc A magnetostriction transducer
US6286361B1 (en) 1998-01-05 2001-09-11 Rolls-Royce Plc Method and apparatus for remotely detecting pressure, force, temperature, density, vibration, viscosity and speed of sound in a fluid
GB0205228D0 (en) * 2002-03-06 2002-04-17 Hydramotion Ltd Mechanical resonator system
CN113203661B (en) * 2021-04-08 2022-05-06 浙江大学 Device and method for rapid detection of blood viscosity based on ultra-fine metal tube ultrasonic guided wave
CN114199724B (en) * 2021-11-15 2024-07-05 南昌大学 Method for measuring liquid viscosity coefficient based on underdamped vibration of thin disc rotor

Also Published As

Publication number Publication date
DE3201724A1 (en) 1982-12-09
JPS57196133A (en) 1982-12-02
SE8203243L (en) 1982-11-26
GB2099998A (en) 1982-12-15
IT1149537B (en) 1986-12-03
IT8219396A0 (en) 1982-02-02
FR2506457A1 (en) 1982-11-26

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