JPH05149861A - Method and apparatus for measuring physical properties of fluid - Google Patents
Method and apparatus for measuring physical properties of fluidInfo
- Publication number
- JPH05149861A JPH05149861A JP29139791A JP29139791A JPH05149861A JP H05149861 A JPH05149861 A JP H05149861A JP 29139791 A JP29139791 A JP 29139791A JP 29139791 A JP29139791 A JP 29139791A JP H05149861 A JPH05149861 A JP H05149861A
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- amplitude value
- viscosity
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- 239000012530 fluid Substances 0.000 title claims abstract description 46
- 230000000704 physical effect Effects 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 16
- 238000011088 calibration curve Methods 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 18
- 230000005284 excitation Effects 0.000 description 17
- 238000004364 calculation method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、流動体の物性、特に粘
度の測定方法及び測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for measuring the physical properties of a fluid, especially the viscosity.
【０００２】[0002]
【発明の背景】物性の測定、特に流動体（液体）の粘度
の測定に関しては、従来より様々な方法が知られてい
る。例えば、毛細管式、落体式、回転式あるいは振動式
といった方法が知られている。中でも、振動式粘度測定
装置は、操作や取扱いが簡単で、しかも精度が高いとい
った特長が有る。特に、音叉型振動式粘度計が優れたも
のと言われている。この音叉型振動式粘度計は、先端に
感応板を有する一対の板バネを一定の振動数で逆位相に
強制的に共振振動させ、液体試料中に挿入された感応板
と液体試料との間に生じる剪断抵抗の相違を、板バネ
（感応板）の振幅値の変化として検出し、振幅値と粘性
抵抗との間には逆比例の関係が有ることを利用して、試
料の粘度を求めるように構成されたものである。BACKGROUND OF THE INVENTION Various methods are conventionally known for the measurement of physical properties, particularly the viscosity of a fluid (liquid). For example, methods such as a capillary type, a falling body type, a rotary type, and a vibration type are known. Among them, the vibration type viscosity measuring device is characterized in that it is easy to operate and handle and has high accuracy. In particular, the tuning fork type vibration viscometer is said to be excellent. This tuning-fork type vibration viscometer forces a pair of leaf springs with a sensitive plate at the tip to resonate forcibly in opposite phases at a constant frequency, causing a resonance between the sensitive plate and the liquid sample inserted in the liquid sample. The difference in the shear resistance that occurs in the sample is detected as a change in the amplitude value of the leaf spring (sensitive plate), and the viscosity of the sample is obtained by utilizing the fact that there is an inverse proportional relationship between the amplitude value and the viscous resistance. It is configured as follows.
【０００３】すなわち、板バネの振動は、音叉型振動系
の採用により反力を抑え、常時安定した正弦振動を継続
するから、１自由度の粘性減衰強制振動系として取り扱
うことができ、これは次の微分方程式により表せる。That is, since the vibration of the leaf spring suppresses the reaction force by adopting the tuning fork type vibration system and continuously maintains a stable sine vibration, it can be handled as a viscous damping forced vibration system having one degree of freedom. It can be expressed by the following differential equation.
【０００４】[0004]
【数１】 [Equation 1]
【０００５】ここで、慣性力と復元力は、板バネが共振
振動することから互いに釣り合い、板バネに強制振動を
与える限り、粘性減衰力に応じた振幅値の変化を伴って
振動を継続する。又、共振点における振幅値は次式の通
りであり、加振力及び振動系の固有振動数を一定とすれ
ば、振幅値と粘性減衰係数の関係は逆比例関係にあると
言える。Here, the inertial force and the restoring force balance each other because the leaf spring resonates and vibrate with each other, and as long as forced vibration is given to the leaf spring, the vibration continues with a change in the amplitude value according to the viscous damping force. .. Further, the amplitude value at the resonance point is given by the following equation, and it can be said that the relationship between the amplitude value and the viscous damping coefficient is inversely proportional if the excitation force and the natural frequency of the vibration system are constant.
【０００６】[0006]
【数２】 [Equation 2]
【０００７】粘性減衰係数は、試料中に挿入された感応
板の面に対して直角方向の振動伝播距離が微小であると
すれば、振動速度とこれに伴う試料の歪速度とは同次元
にあると考えられ、絶対粘度と比例関係にあると言え
る。従って、粘度が既知である試料を用いて、粘度と振
幅値との関係式を求めておけば、未知の試料の粘度は振
幅値を測定することにより得ることができる。そして、
この測定方法は、精度が±２％以内と高精度であり、し
かも測定粘度範囲が約１ｍＰａ・ｓ〜１００，０００ｍ
Ｐａ・ｓまで可能であるといった特長が有る。If the vibration propagation distance in the direction perpendicular to the plane of the sensitive plate inserted in the sample is small, the viscous damping coefficient has the same dimension as the vibration velocity and the accompanying strain velocity of the sample. It is considered to be present and can be said to be proportional to the absolute viscosity. Therefore, if the relational expression between the viscosity and the amplitude value is obtained using the sample of which the viscosity is known, the viscosity of the unknown sample can be obtained by measuring the amplitude value. And
This measurement method is highly accurate within ± 2% and has a viscosity range of about 1 mPa · s to 100,000 m.
It has the feature that it can handle even Pas.
【０００８】しかしながら、このような音叉型振動式粘
度計Ａを用いての上記のような粘度測定方法にも次のよ
うな問題が有ることが判って来た。 上記の測定方法は、板バネ（感応板）に印加される
加振力Ｆを一定にし、その時の振幅値ｘを測定すること
により粘度値に換算する方法である。従って、印加した
特定の加振力Ｆ0 によっては振幅値ｘが大きすぎること
も有り、逆に、小さすぎることも有り、振幅値ｘが大き
すぎたり、小さすぎたりすると測定精度に問題が起きる
から、幅広い測定粘度範囲を得るには、図７に示す如
く、設定加振力Ｆ値を複数個持たなければならない。こ
こで、測定試料がニュートン流体であれば格別なる問題
はないが、非ニュートン流体を測定する場合には、測定
レンジが異なると、つまり設定加振力Ｆ値が変化する
と、見掛け粘度が異なって現れる問題が有る。 上記の測定方法は、一つの測定レンジにおける測定
粘度範囲を、例えば１０ n-1 ｍＰａ・ｓ〜１０n ｍＰａ
・ｓのように区切って設定しなければならないから、一
つの試料における測定点は複数の測定レンジがあっても
基本的に１点のみとなり、測定された試料がニュートン
流体であるのか非ニュートン流体であるのかの知見も得
られない。 上記の測定方法は、特定の加振力Ｆ0 下での粘性抵
抗に応じた振幅値ｘを測定し、この振幅値ｘを粘度に換
算する方法であることから、複数の測定レンジを設けた
場合には、それに対応して、図７に示す如く、複数の検
量線が必要となり、取扱いが面倒で有る。However, such a tuning fork type viscous viscous
For the above viscosity measurement method using a meter A,
It turned out that there was such a problem. The above measuring method is applied to the leaf spring (sensitive plate).
Keep the excitation force F constant and measure the amplitude value x at that time.
Is a method of converting into a viscosity value. Therefore, applied
Specific excitation force F0The amplitude value x is too large depending on
Amplitude value x is large
If it is too small or too small, there will be problems in measurement accuracy.
Therefore, in order to obtain a wide range of measured viscosity, as shown in FIG.
In addition, it must have a plurality of set exciting force F values. This
Here, if the measurement sample is a Newtonian fluid, a special problem
But not when measuring non-Newtonian fluids
When the range is different, that is, the set excitation force F value changes
There is a problem that the apparent viscosities appear differently. The above measurement method is for measurement in one measurement range.
The viscosity range is, for example, 10 n-1mPa · s-10nmPa
・ Because it must be set by dividing it like s,
Even if there are multiple measurement ranges,
Basically there is only one point, and the measured sample is Newton
We also got the knowledge of whether it is a fluid or a non-Newtonian fluid.
I can't. The above measuring method is based on a specific excitation force F0Viscous resistance under
Measure the amplitude value x according to the resistance and convert this amplitude value x to viscosity.
Since it is a calculation method, multiple measurement ranges are provided.
In that case, as shown in FIG.
A calibration curve is required, and handling is troublesome.
【０００９】[0009]
【発明の開示】本発明の第１の目的は、非ニュートン流
体を測定した場合でも同一条件下での見掛けの粘度を求
められる技術を提供することである。本発明の第２の目
的は、測定した流体がニュートン流体であるのか非ニュ
ートン流体であるのかの知見も簡単に得られる技術を提
供することである。DISCLOSURE OF THE INVENTION A first object of the present invention is to provide a technique capable of obtaining an apparent viscosity under the same conditions even when measuring a non-Newtonian fluid. A second object of the present invention is to provide a technique by which the knowledge as to whether the measured fluid is a Newtonian fluid or a non-Newtonian fluid can be easily obtained.
【００１０】本発明の第３の目的は、複数の検量線を必
要とせず、一つの検量線でもって粘度が求められるか
ら、取扱いが簡単な技術を提供することである。上記本
発明の目的は、流動体試料中に浸けられた感応部材が所
定の振幅で振動するように力を加える工程と、感応部材
が所定の振幅で振動するように印加した力を検出する工
程と、この検出された値と所定の検量線とから前記流動
体試料の物性値を求める工程とを具備することを特徴と
する流動体の物性測定方法によって達成される。A third object of the present invention is to provide a technique which is easy to handle, since a plurality of calibration curves are not required and the viscosity can be obtained by one calibration curve. The above object of the present invention is to apply a force so that the sensitive member immersed in the fluid sample vibrates at a predetermined amplitude, and to detect the force applied so that the sensitive member vibrates at a predetermined amplitude. And a step of obtaining a physical property value of the fluid sample from the detected value and a predetermined calibration curve, the method for measuring a physical property of a fluid.
【００１１】又、流動体試料中に浸けられた感応部材が
所定の振幅で振動するように力を加える印加手段と、感
応部材が所定の振幅で振動するように印加した力を検出
する検出手段と、この検出手段で検出された値と所定の
検量線とから前記流動体試料の物性値を算出する算出手
段とを具備することを特徴とする流動体の物性測定装置
によって達成される。Further, an applying means for applying a force so that the sensitive member immersed in the fluid sample vibrates at a predetermined amplitude, and a detecting means for detecting the force applied so that the sensitive member vibrates at a predetermined amplitude. And a calculating means for calculating the physical property value of the fluid sample from the value detected by the detecting means and a predetermined calibration curve.
【００１２】すなわち、一定の加振力Ｆ0 の下で振幅値
ｘを測定することにより粘度を求めることが出来たので
あるが、上記〔数２〕の式によれば、一定の振幅値ｘ0
の下での加振力Ｆを測定することにより粘度を求めるこ
とも可能であることが判る。ところで、従来の粘度の測
定は一定の加振力Ｆ0 の下における振幅値ｘを測定し、
これを粘度値に換算するものであったから、粘度が小さ
いものである場合には加振力Ｆ0 が大きくなくても振幅
値ｘが大きすぎることが有り、逆に、粘度が大きなもの
である場合には加振力Ｆ0 が小さくなくても振幅値ｘが
小さすぎることが有り、設定加振力Ｆ0 値を複数持つよ
うにしなければならないものの、上記のように一定の振
幅値ｘ0 を得る為に必要な加振力Ｆを測定し、これを粘
度値に換算する本発明にあっては、前記のような欠陥が
なく、そして非ニュートン流体を測定した場合でも同一
条件下での見掛けの粘度を求められる特長が奏される。That is, the viscosity could be obtained by measuring the amplitude value x under a constant excitation force F 0. According to the above formula (2), the constant amplitude value x 0
It is understood that it is also possible to obtain the viscosity by measuring the excitation force F under. By the way, in the conventional measurement of viscosity, the amplitude value x under a constant excitation force F 0 is measured,
Since this is converted into a viscosity value, when the viscosity is small, the amplitude value x may be too large even if the exciting force F 0 is not large, and conversely, the viscosity is large. In this case, the amplitude value x may be too small even if the exciting force F 0 is not small, and although it is necessary to have a plurality of set exciting force F 0 values, the constant amplitude value x 0 is set as described above. In the present invention in which the vibrating force F necessary for obtaining is measured and converted into a viscosity value, there is no defect as described above, and even when a non-Newtonian fluid is measured, It has the characteristics of requiring an apparent viscosity.
【００１３】又、従来の一定の加振力Ｆ0 による振幅値
ｘの測定方法では、その方式上一つの測定レンジにおけ
る測定粘度範囲を、例えば１０n-1 ｍＰａ・ｓ〜１０n
ｍＰａ・ｓのように区切って設定しなければならないの
に対して、一定の振幅値ｘ0 を得る為に必要な加振力Ｆ
を測定する方法では、前記のような制約は起きず、複数
の検量線を必要とせず、一つの検量線でもって粘度が求
められ、そして振幅値ｘ0 を変えて（複数の振幅値、例
えばｘ01，ｘ02，ｘ03でもって）測定した場合には、こ
の流動体がニュートン流体であるのか非ニュートン流体
であるのかの知見も得られるといった特長も奏される。Further, in the conventional method of measuring the amplitude value x by the constant excitation force F 0 , the measured viscosity range in one measurement range is, for example, 10 n-1 mPa · s to 10 n.
In contrast to mPa · s, which must be set separately, the excitation force F required to obtain a constant amplitude value x 0
In the method of measuring, the above-mentioned restrictions do not occur, a plurality of calibration curves are not required, the viscosity is obtained by one calibration curve, and the amplitude value x 0 is changed (a plurality of amplitude values, for example, When measured (with x 01 , x 02 , x 03 ), it is possible to obtain the knowledge whether the fluid is a Newtonian fluid or a non-Newtonian fluid.
【００１４】[0014]
【実施例】図１〜図６は本発明に係る流動体の物性測定
に関するものであり、図１は流動体の物性測定装置にお
ける音叉型振動式粘度計の概略図、図２は流動体の物性
測定装置の要部のブロック図、図３は測定試料が低粘度
の場合での振幅値制御の方式を示す説明図、図４は測定
試料が高粘度の場合での振幅値制御の方式を示す説明
図、図５は振幅値制御のフローチャート、図６は検量線
のグラフである。1 to 6 relate to measurement of physical properties of a fluid according to the present invention. FIG. 1 is a schematic view of a tuning fork type viscometer in a fluid physical property measuring apparatus, and FIG. FIG. 3 is a block diagram of a main part of the physical property measuring apparatus, FIG. 3 is an explanatory view showing a method of controlling an amplitude value when a measurement sample has a low viscosity, and FIG. 4 shows a method of controlling an amplitude value when a measurement sample has a high viscosity. FIG. 5 is a flow chart of amplitude value control, and FIG. 6 is a graph of a calibration curve.
【００１５】本発明の流動体の物性測定装置において
も、板バネ先端に一対の感応板を有する音叉型振動式粘
度計が用いられる。この音叉型振動式粘度計Ａの概略を
図１に示すが、音叉型振動式粘度計が図１のものに限ら
れることはない。各図中、１ａ，１ｂは感応板、２ａ，
２ｂ（２ｂは図示せず）は先端に感応板１ａ，１ｂを有
する一対の板バネであり、板バネ２ａ，２ｂを一定の振
動数で逆位相に強制的に共振振動させ、液体試料中に挿
入された感応板１ａ，１ｂと液体試料との間に生じる剪
断抵抗の相違を、板バネ２ａ，２ｂ（感応板１ａ，１
ｂ）に印加した力の変化として検出し、試料の粘度を求
めるように構成されたものである。Also in the fluid physical property measuring apparatus of the present invention, a tuning fork type vibration viscometer having a pair of sensitive plates at the tip of the leaf spring is used. The tuning fork type vibration viscometer A is schematically shown in FIG. 1, but the tuning fork type vibration viscometer is not limited to that shown in FIG. In each figure, 1a and 1b are sensitive plates, 2a and
Reference numeral 2b (2b is not shown) is a pair of leaf springs having sensitive plates 1a and 1b at their ends. The leaf springs 2a and 2b are forcibly resonantly oscillated in a reverse phase at a constant frequency so that they are oscillated in a liquid sample. The difference in shear resistance generated between the inserted sensitive plates 1a and 1b and the liquid sample is determined by the leaf springs 2a and 2b (sensitive plates 1a and 1b).
It is configured to detect the change in the force applied to b) and obtain the viscosity of the sample.
【００１６】３は温度センサ、４は電磁コイル、５はフ
ェライト磁石であり、電磁コイル４とフェライト磁石５
とからなるムービングマグネット方式の印加手段により
板バネ２ａ，２ｂ先端に設けられた感応板１ａ，１ｂが
所定の振幅値ｘ0 で振動するように構成されている。６
は板バネ２ａ，２ｂの振幅値を測定する渦電流損検出非
接触型の変位センサ、７は液体試料が充填される容器、
８は板バネ２ａ，２ｂが固定される中央支持部材であ
り、感応板１ａ，１ｂが容器７内の液体試料中に一定の
深さでもって浸かるように構成されたものである。Reference numeral 3 is a temperature sensor, 4 is an electromagnetic coil, 5 is a ferrite magnet, and the electromagnetic coil 4 and the ferrite magnet 5 are
By means of a moving magnet type applying means, the sensitive plates 1a and 1b provided at the tips of the leaf springs 2a and 2b are configured to vibrate at a predetermined amplitude value x 0 . 6
Is a non-contact displacement sensor for detecting eddy current loss that measures the amplitude value of the leaf springs 2a and 2b, 7 is a container filled with a liquid sample,
Reference numeral 8 denotes a central support member to which the leaf springs 2a and 2b are fixed, and the sensitive plates 1a and 1b are configured to be immersed in the liquid sample in the container 7 at a constant depth.
【００１７】９は自動減衰器、１０はアンプ、１１は電
流検出器、１２はアンプ、１３は整流器、１４は比較回
路、１５は制御回路、１６は電流／電圧変換回路、１７
はＡ／Ｄ変換回路である。そして、感応板１ａ，１ｂが
所定の振幅値ｘ0 （例えば、電圧に換算して振幅値１０
０ｍＶ）で振動する為に加えた加振力Ｆが電流検出器１
１（検出手段）で検出されるように構成されており、さ
らに電流検出器１１で検出された値と所定の検量線とか
ら前記流動体試料の物性値（例えば、粘度）を算出する
ことが出来る算出手段１８が設けられている。Reference numeral 9 is an automatic attenuator, 10 is an amplifier, 11 is a current detector, 12 is an amplifier, 13 is a rectifier, 14 is a comparison circuit, 15 is a control circuit, 16 is a current / voltage conversion circuit, 17
Is an A / D conversion circuit. Then, the sensitive plates 1a and 1b have a predetermined amplitude value x 0 (for example, an amplitude value of 10 when converted to a voltage).
The exciting force F applied to vibrate at 0 mV) is the current detector 1
1 (detection means), the physical property value (for example, viscosity) of the fluid sample can be calculated from the value detected by the current detector 11 and a predetermined calibration curve. A calculation means 18 capable of performing the calculation is provided.
【００１８】そして、測定試料中に浸けられた感応板１
ａ，１ｂが振幅値ｘ0 でもって振動するように、先ず、
例えば１０ｍＡの電流が印加手段の電磁コイル４に０．
５秒間通電されて加振力Ｆが板バネ２ａ，２ｂ（感応板
１ａ，１ｂ）に印加され、これによる振動特性（振幅
値）が板バネ２ａ，２ｂに対応して設けられた変位セン
サ６により検出され、検出された振幅値ｘの信号がアン
プ１２及び整流器１３を介して入力された比較回路１４
で基準振幅値と比較され、基準振幅値より小さい場合に
はその程度により、例えば図３に示す如く数ｍＡ又は図
４に示す如く１００ｍＡの電流の通電による加振力が印
加されるように制御回路１５から信号が出力され、アン
プ１０を介して電流が電磁コイル４に通電されて加振力
が印加され、感応板が振幅値ｘ0 （例えば、１００ｍ
Ｖ）で振動するようになるまで上記の工程が繰り返し行
われる。逆に、基準振幅値より大きい場合には自動減衰
器９により電磁コイル４に通電される電流が減少させら
れる。The sensitive plate 1 immersed in the measurement sample
First, so that a and 1b vibrate with the amplitude value x 0 ,
For example, a current of 10 mA is applied to the electromagnetic coil 4 of the applying means.
After being energized for 5 seconds, the excitation force F is applied to the leaf springs 2a and 2b (sensing plates 1a and 1b), and the vibration characteristic (amplitude value) due to this is provided to the displacement sensor 6 provided corresponding to the leaf springs 2a and 2b. The comparator circuit 14 in which the signal of the detected amplitude value x is input via the amplifier 12 and the rectifier 13
Is compared with the reference amplitude value, and when it is smaller than the reference amplitude value, the excitation force is controlled by applying a current of several mA as shown in FIG. 3 or 100 mA as shown in FIG. A signal is output from the circuit 15, a current is applied to the electromagnetic coil 4 via the amplifier 10 to apply an exciting force, and the sensitive plate moves to an amplitude value x 0 (for example, 100 m).
The above steps are repeated until it vibrates at V). On the contrary, when the amplitude is larger than the reference amplitude value, the automatic attenuator 9 reduces the current supplied to the electromagnetic coil 4.
【００１９】このようにして、すなわち図５に示すフロ
ーチャートの過程を経て、感応板が振幅値ｘ0 （例え
ば、１００ｍＶ）で振動するようになると、その時に電
磁コイルに通電された電流値が電流検出器１１により検
出され、この検出電流値が電流／電圧変換回路１６及び
Ａ／Ｄ変換回路１７を介して算出手段１８に入力され、
予め粘度の判った試料で作製された図６に示す如くの検
量線との比較から感応板１ａ，１ｂが浸けられた試料の
粘度が算出されるようになる。In this way, that is, through the process of the flow chart shown in FIG. 5, when the sensitive plate vibrates at the amplitude value x 0 (for example, 100 mV), the current value applied to the electromagnetic coil at that time becomes the current value. The detected current value detected by the detector 11 is input to the calculation means 18 via the current / voltage conversion circuit 16 and the A / D conversion circuit 17,
The viscosity of the sample in which the sensitive plates 1a and 1b are dipped can be calculated by comparison with the calibration curve as shown in FIG. 6 which is prepared from the sample of which viscosity is known in advance.
【００２０】上記のように構成させた本発明は、粘度の
測定を一定の振幅値ｘ0 を得る為に必要な加振力Ｆを測
定し、すなわち振幅値制御によって粘度を求めるように
してなるから、一定の加振力Ｆ0 下における振幅値ｘを
測定し、すなわち加振力制御によって粘度を求める場合
の欠陥、つまり設定加振力値を複数持つようにしなけれ
ばならないといった煩雑がなくなり、一点の測定のみで
粘度が測定される。According to the present invention having the above-mentioned structure, the vibrating force F necessary for obtaining the constant amplitude value x 0 is measured for the viscosity, that is, the viscosity is obtained by controlling the amplitude value. Therefore, the amplitude value x under a constant excitation force F 0 is measured, that is, the defect in obtaining the viscosity by the excitation force control, that is, the complexity of having to have a plurality of set excitation force values, Viscosity can be measured with only one measurement.
【００２１】そして、一点の測定のみで粘度が測定され
ることは、同時に、例えば１０n-1 ｍＰａ・ｓ〜１０n
ｍＰａ・ｓのように区切って測定しなくて済むことであ
り、複数の検量線を必要とせず、一つの検量線でもって
粘度が求められるから、測定が極めて簡単に行える。さ
らには、感応板の振幅値が、例えば５０ｍＶ、１００ｍ
Ｖ、１５０ｍＶといったように複数の振幅値（三点に限
らない）でもって測定した場合には、この流動体がニュ
ートン流体であるか否かの知見、さらには疑塑性流体、
チキソトロピー流体、ビンガム流体、非ビンガム流体、
あるいはダイラタント流体であるかの概略知見も得られ
る。The fact that the viscosity can be measured by measuring only one point means that the viscosity can be measured at the same time, for example, from 10 n-1 mPa · s to 10 n.
This is because it is not necessary to divide the measurement like mPa · s, and a plurality of calibration curves are not required, and the viscosity can be obtained by one calibration curve, so that the measurement can be performed very easily. Furthermore, the amplitude value of the sensitive plate is, for example, 50 mV, 100 m
When measured with a plurality of amplitude values (not limited to three points) such as V and 150 mV, it is possible to find out whether this fluid is a Newtonian fluid, and further, a pseudoplastic fluid,
Thixotropic fluid, Bingham fluid, Non-Bingham fluid,
Alternatively, it is possible to obtain a general knowledge of whether it is a dilatant fluid.
【００２２】[0022]
【効果】本発明によれば、粘度の測定を一定の振幅値を
得る為に必要な加振力を測定し、すなわち振幅値制御に
よって粘度を求めるようにしてなるから、一定の加振力
下における振幅値を測定し、すなわち加振力制御によっ
て粘度を求める場合の欠陥、つまり設定加振力値を複数
持つようにしなければならないといった煩雑がなくな
り、一点の測定のみで粘度が測定され、そして一点の測
定のみで粘度が測定されることは、同時に、例えば１０
n-1 ｍＰａ・ｓ〜１０n ｍＰａ・ｓのように区切って測
定しなくて済むことであり、複数の検量線を必要とせ
ず、一つの検量線でもって粘度が求められるから、測定
が極めて簡単に行え、さらには感応板の振幅値が、例え
ば５０ｍＶ、１００ｍＶ、１５０ｍＶといったように複
数の振幅値でもって測定した場合には、この流動体がニ
ュートン流体であるか否かの知見も得られるといった特
長を有する。[Effect] According to the present invention, the vibrating force required to obtain a constant amplitude value is measured, that is, the viscosity is obtained by controlling the amplitude value. Measure the amplitude value at, that is, the defect when determining the viscosity by the excitation force control, that is, the complexity of having to have a plurality of set excitation force value is eliminated, the viscosity is measured by only one point of measurement, and The fact that the viscosity can be measured by measuring only one point means that the viscosity can be measured at the same time, for example, 10
n-1 is that it is not necessary to measure separated as mPa · s~10 n mPa · s, without the need for multiple calibration curves, because the viscosity is determined with a single calibration curve, the measurement is very It can be easily performed, and further, when the amplitude value of the sensitive plate is measured with a plurality of amplitude values such as 50 mV, 100 mV, and 150 mV, the knowledge as to whether this fluid is a Newtonian fluid can be obtained. It has the following features.
【図１】本発明に係る流動体の物性測定装置に用いられ
る音叉型振動式粘度計の概略図である。FIG. 1 is a schematic diagram of a tuning fork type vibration viscometer used in a fluid physical property measuring apparatus according to the present invention.
【図２】本発明に係る流動体の物性測定装置の要部のブ
ロック図である。FIG. 2 is a block diagram of a main part of a fluid physical property measuring device according to the present invention.
【図３】本発明に係る流動体の物性測定装置における振
幅値制御の説明図である。FIG. 3 is an explanatory diagram of amplitude value control in a fluid physical property measuring device according to the present invention.
【図４】本発明に係る流動体の物性測定装置における振
幅値制御の説明図である。FIG. 4 is an explanatory diagram of amplitude value control in the fluid physical property measuring device according to the present invention.
【図５】本発明に係る流動体の物性測定装置における振
幅値制御のフローチャートである。FIG. 5 is a flow chart of amplitude value control in the fluid physical property measuring apparatus according to the present invention.
【図６】本発明に係る流動体の物性測定装置による粘度
算出に用いられる検量線のグラフである。FIG. 6 is a graph of a calibration curve used for viscosity calculation by the fluid physical property measuring apparatus according to the present invention.
【図７】従来の流動体の物性測定装置による粘度算出に
用いられる検量線のグラフである。FIG. 7 is a graph of a calibration curve used for viscosity calculation by a conventional fluid physical property measuring apparatus.
Ａ 音叉型振動式粘度計 １ａ，１ｂ 感応板 ２ａ，２ｂ 板バネ ４ 電磁コイル ５ フェライト磁石 ６ 渦電流損検出非接触型変位センサ ９ 自動減衰器 １０，１２ アンプ １１ 電流検出器 １４ 比較回路 １５ 制御回路 １６ 電流／電圧変換回路 １７ Ａ／Ｄ変換回路 １８ 算出手段 A Tuning fork type vibration viscometer 1a, 1b Sensitive plate 2a, 2b Leaf spring 4 Electromagnetic coil 5 Ferrite magnet 6 Eddy current loss detection non-contact displacement sensor 9 Automatic attenuator 10, 12 Amplifier 11 Current detector 14 Comparison circuit 15 Control Circuit 16 Current / voltage conversion circuit 17 A / D conversion circuit 18 Calculation means
Claims (2)
定の振幅で振動するように力を加える工程と、感応部材
が所定の振幅で振動するように印加した力を検出する工
程と、この検出された値と所定の検量線とから前記流動
体試料の物性値を求める工程とを具備することを特徴と
する流動体の物性測定方法。1. A step of applying a force so that a sensitive member immersed in a fluid sample vibrates at a predetermined amplitude, and a step of detecting a force applied so that the sensitive member vibrates at a predetermined amplitude, A method for measuring physical properties of a fluid, comprising the step of obtaining physical properties of the fluid sample from the detected values and a predetermined calibration curve.
定の振幅で振動するように力を加える印加手段と、感応
部材が所定の振幅で振動するように印加した力を検出す
る検出手段と、この検出手段で検出された値と所定の検
量線とから前記流動体試料の物性値を算出する算出手段
とを具備することを特徴とする流動体の物性測定装置。2. A means for applying a force so that the sensitive member immersed in the fluid sample vibrates at a predetermined amplitude, and a detecting means for detecting the force applied so that the sensitive member vibrates at a predetermined amplitude. And a calculating means for calculating the physical property value of the fluid sample from the value detected by the detecting means and a predetermined calibration curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3291397A JP2534173B2 (en) | 1991-11-07 | 1991-11-07 | Fluid viscosity measuring method and measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3291397A JP2534173B2 (en) | 1991-11-07 | 1991-11-07 | Fluid viscosity measuring method and measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05149861A true JPH05149861A (en) | 1993-06-15 |
| JP2534173B2 JP2534173B2 (en) | 1996-09-11 |
Family
ID=17768374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3291397A Expired - Lifetime JP2534173B2 (en) | 1991-11-07 | 1991-11-07 | Fluid viscosity measuring method and measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2534173B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014049698A1 (en) * | 2012-09-26 | 2014-04-03 | 株式会社 エー・アンド・デイ | Method and device for measuring fluid body physical properties |
| WO2014132412A1 (en) | 2013-02-28 | 2014-09-04 | 株式会社 エー・アンド・デイ | Method for finding shear rate of fluid, and program and device for same |
| JP2018189569A (en) * | 2017-05-10 | 2018-11-29 | ディテック株式会社 | Viscosity measuring device |
| JP2019095361A (en) * | 2017-11-27 | 2019-06-20 | 株式会社松栄電子研究所 | Simple viscosity measuring device and viscosity measurement method |
| RU2727263C1 (en) * | 2020-01-10 | 2020-07-21 | Федеральное государственное бюджетное учреждение науки Институт химии нефти Сибирского отделения Российской академии наук (ИХН СО РАН) | Vibration viscometer for thixotropic liquids |
| CN117110143A (en) * | 2023-10-24 | 2023-11-24 | 钛玛科（北京）工业科技有限公司 | An online detection method and device for lithium battery slurry viscosity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11714039B2 (en) | 2020-11-06 | 2023-08-01 | Saudi Arabian Oil Company | Device and method to obtain the viscosity of polymer fluids used for enhanced oil recovery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915838A (en) * | 1982-07-16 | 1984-01-26 | Sumitomo Metal Ind Ltd | Method and apparatus for measuring viscosity of high pressure fluid |
| JPS62133155U (en) * | 1986-02-10 | 1987-08-22 |
-
1991
- 1991-11-07 JP JP3291397A patent/JP2534173B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5915838A (en) * | 1982-07-16 | 1984-01-26 | Sumitomo Metal Ind Ltd | Method and apparatus for measuring viscosity of high pressure fluid |
| JPS62133155U (en) * | 1986-02-10 | 1987-08-22 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014049698A1 (en) * | 2012-09-26 | 2014-04-03 | 株式会社 エー・アンド・デイ | Method and device for measuring fluid body physical properties |
| JPWO2014049698A1 (en) * | 2012-09-26 | 2016-08-22 | 株式会社エー・アンド・デイ | Method and apparatus for measuring physical properties of fluid |
| WO2014132412A1 (en) | 2013-02-28 | 2014-09-04 | 株式会社 エー・アンド・デイ | Method for finding shear rate of fluid, and program and device for same |
| JP2018189569A (en) * | 2017-05-10 | 2018-11-29 | ディテック株式会社 | Viscosity measuring device |
| JP2019095361A (en) * | 2017-11-27 | 2019-06-20 | 株式会社松栄電子研究所 | Simple viscosity measuring device and viscosity measurement method |
| RU2727263C1 (en) * | 2020-01-10 | 2020-07-21 | Федеральное государственное бюджетное учреждение науки Институт химии нефти Сибирского отделения Российской академии наук (ИХН СО РАН) | Vibration viscometer for thixotropic liquids |
| CN117110143A (en) * | 2023-10-24 | 2023-11-24 | 钛玛科（北京）工业科技有限公司 | An online detection method and device for lithium battery slurry viscosity |
| CN117110143B (en) * | 2023-10-24 | 2024-02-02 | 钛玛科（北京）工业科技有限公司 | Lithium battery slurry viscosity on-line detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2534173B2 (en) | 1996-09-11 |
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