JPS6396546A - Characteristic detector for water soluble oil - Google Patents
Characteristic detector for water soluble oilInfo
- Publication number
- JPS6396546A JPS6396546A JP24391786A JP24391786A JPS6396546A JP S6396546 A JPS6396546 A JP S6396546A JP 24391786 A JP24391786 A JP 24391786A JP 24391786 A JP24391786 A JP 24391786A JP S6396546 A JPS6396546 A JP S6396546A
- Authority
- JP
- Japan
- Prior art keywords
- water
- oil
- soluble oil
- capacitor
- electrodes
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 18
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000005868 electrolysis reaction Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 78
- 230000007423 decrease Effects 0.000 description 12
- 230000006866 deterioration Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010913 used oil Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は、液圧作動装置に使用される水溶性油（水−グ
ライコール作動油等）の水分の蒸発による水分変化や劣
化生成物の増加および酸化物などによる性状変化を検出
する性状検出装置に間する。Detailed Description of the Invention "Field of Industrial Application" The present invention is directed to the prevention of moisture changes and deterioration products caused by evaporation of water in water-soluble oils (water-glycol hydraulic oils, etc.) used in hydraulic operating devices. A property detection device is used to detect property changes due to increase in oxidation and oxides.
「従来の技術」
最近において、いわゆる油圧シリンダを有する液圧作動
装置には鉱油の価格高騰に対する対策、および火災防止
の安全性を向上するために鉱油の代りに難燃性の水溶性
油が用いられている０例えばエチレン・グリコールを主
成分とする水−グライコール作動油は、基準水分量が約
４０％であり、電気的には電解質溶液に近い油である。``Prior Art'' Recently, flame-retardant water-soluble oil has been used instead of mineral oil in hydraulic actuators having so-called hydraulic cylinders in order to counter the soaring price of mineral oil and to improve fire prevention safety. For example, a water-glycol hydraulic oil whose main component is ethylene glycol has a standard water content of about 40% and is electrically close to an electrolyte solution.
その水溶性油は、液圧作動装置を円滑に作動させるため
には水分の量や劣化生成物の及および酸化度合いを常時
把握し、液圧作動装置が焼付きや腐食および摩耗などに
よってトラブルが発生するのを防止するために、常時水
溶性油の状態を定期的に管理することが必要である。In order for the water-soluble oil to operate smoothly, the amount of moisture, the extent of deterioration products, and the degree of oxidation must be constantly monitored to ensure that the hydraulically operated equipment does not suffer from problems such as seizing, corrosion, or wear. In order to prevent this from occurring, it is necessary to regularly control the state of the water-soluble oil at all times.
従来、水溶性油の管理のためには、新油と使用油の色彩
によって外観を目視で比較することによリ、使用油の劣
化状態を概略にて判断したのち、劣化が生じたと判断さ
れた水溶性油についてのみ、水分の含有量が分析測定さ
れ、また劣化物の含有量の指標値としてアルカリ価およ
びｐＨ値などがメーカで測定された。すなわち、外観に
よる比較判断には個人差があり、定量的な判断が行なわ
れ難いなめ、定量的な判断基準として水分の含有量、ア
ルカリ価および９Ｈ値などの分析測定を行っている。し
かし、分析測定方法は多大の時間と費用が費やされ、し
かも現場での直接測定が行なわれにくいという問題があ
った。Conventionally, in order to manage water-soluble oils, it was necessary to visually compare the appearance of new oil and used oil based on their color, and after roughly determining the state of deterioration of used oil, it was determined that deterioration had occurred. The water content was analyzed and measured only for the water-soluble oils used, and the alkali value and pH value were measured by the manufacturer as index values for the content of degraded products. That is, since there are individual differences in comparative judgment based on appearance and it is difficult to make a quantitative judgment, analytical measurements such as moisture content, alkali value, and 9H value are used as quantitative judgment criteria. However, the analytical measurement method requires a lot of time and money, and there are problems in that it is difficult to perform direct measurements on site.
従来のオイルの劣化状態を検知する手段としては、例え
ば特開昭５９−６０２５０号公報に示されるように、オ
イルが劣化するに伴って絶縁性が悪化して直流抵抗が低
下するため油に直流電圧を加えて、油抵抗を測定する方
法が知られている。Conventional means for detecting the deterioration state of oil include, for example, as shown in Japanese Patent Application Laid-Open No. 59-60250, as the oil deteriorates, its insulation properties deteriorate and the DC resistance decreases, so direct current is applied to the oil. A method of measuring oil resistance by applying voltage is known.
しかし電解質に近い水溶性油は約ＩＫΩ・ｅｍと極めて
電気抵抗が低いため、直流電圧印加により電気分解が生
じ、測定不能におちいるため、従来技術をそのまま水溶
性油へ適応することは困難であった。また、特開昭５８
−８５３１４号公報には、オイル中に配設された一対の
電極間における静電容量の増加またはそのインピーダン
スの減少を交流電圧を印加し、その振幅や位相の変化か
ら検出することにより、オイルの劣化を検知するエンジ
ンオイルの劣化検知装置が開示されているやしかし、電
解質の水溶性油の場合には過大電流が流れるため、従来
技術をそのまま適用すると、交流電圧電源出力が極端に
減少し、測定不能におちいるため、水溶性油へ適応する
ことは困難であった。However, since water-soluble oil close to the electrolyte has an extremely low electrical resistance of approximately IKΩ・em, applying a DC voltage causes electrolysis and makes measurement impossible, making it difficult to apply conventional technology to water-soluble oil as is. Ta. Also, JP-A-58
Publication No. 85314 discloses that an increase in capacitance or a decrease in impedance between a pair of electrodes disposed in oil is detected by applying an alternating current voltage and detecting changes in the amplitude and phase. An engine oil deterioration detection device that detects deterioration has been disclosed.However, in the case of water-soluble oil as an electrolyte, excessive current flows, so if the conventional technology is applied as is, the AC voltage power output will be extremely reduced. It was difficult to apply this method to water-soluble oils because it became impossible to measure.
「発明が解決しようとする問題点」
本発明は、上記の問題に鑑みてなされたものであり、水
溶性油のすいぶんの増減および劣化物の増大などを簡易
に、かつ適確に判定可能な水溶性油の性状検出装置を提
供することを目的とする。"Problems to be Solved by the Invention" The present invention has been made in view of the above problems, and it is possible to easily and accurately determine the slight increase or decrease in water-soluble oil and the increase in degraded products. The purpose of the present invention is to provide a water-soluble oil property detection device.
「問題点を解決するための手段」
上記目的のため、本発明によれば、水溶性油中に配設す
る一対のＴ、極と、該電極と直列に接続され、電極間の
水溶性油の抵抗とによってフィルタ回路を形成するコン
デンサと、前記電極およびコンデンサの両端に接続され
、高周波発振回路と電力増幅器とから成る高周波電源と
、前記コンデンサの両端に生ずる高周波電圧値を検出し
、直流電圧信号に変換する交流−直流変換回路と、該変
換回路出力を水溶性油の性状変化と対応させて表示する
表示部とから構成されることを特徴とする水溶性油の性
状検出装置が提供される。"Means for Solving the Problems" For the above purpose, according to the present invention, a pair of T-poles disposed in water-soluble oil, a pair of T-poles disposed in water-soluble oil, and a water-soluble oil A capacitor forming a filter circuit with a resistor, a high frequency power supply connected to both ends of the electrode and the capacitor and consisting of a high frequency oscillation circuit and a power amplifier, and detecting the high frequency voltage value generated across the capacitor, and detecting the DC voltage. There is provided a water-soluble oil property detection device comprising an AC-DC conversion circuit that converts into a signal, and a display unit that displays the output of the conversion circuit in correspondence with changes in the properties of the water-soluble oil. Ru.
「作用」
上記構成によれば、水溶性油中の水分が減少した時には
電極間の抵抗値が増加することにより、高周波電圧が表
示手段の基準値を下回り、また水溶性油中の劣化物が増
大した時には電極間の抵抗値が減少することにより、高
周波電圧が表示手段の基準値を上回るため、水溶性油の
性状変化およびその要因が適確に表示される。"Function" According to the above configuration, when the water content in the water-soluble oil decreases, the resistance value between the electrodes increases, so that the high-frequency voltage falls below the reference value of the display means, and the degraded substances in the water-soluble oil decrease. When the resistance value increases, the resistance value between the electrodes decreases and the high frequency voltage exceeds the reference value of the display means, so that changes in the properties of the water-soluble oil and its causes are accurately displayed.
「実施例」
次に、本発明の性状検出装置の実施例を図面について説
明する。"Example" Next, an example of the property detection device of the present invention will be described with reference to the drawings.
第１図に示されるように、水溶性油１が満された容器の
内部には一対の電極２が配設されており、その電極２と
直列にコンデンサ３が接続されている。電極２とコンデ
ンサ３の直列回路に、高電力の高周波電流を流す高周波
電源４として、発振器が電力増幅器を介して接続されて
いる。また、コンデンサ３の両端に生じる高周波電圧は
、表示手段をなす表示器７に交流−直流変換器６を介し
て導入されている。As shown in FIG. 1, a pair of electrodes 2 are arranged inside a container filled with water-soluble oil 1, and a capacitor 3 is connected in series with the electrodes 2. An oscillator is connected to the series circuit of the electrode 2 and the capacitor 3 via a power amplifier as a high frequency power source 4 that flows a high power high frequency current. Further, the high frequency voltage generated across the capacitor 3 is introduced via an AC-DC converter 6 to a display 7 serving as a display means.
第１図に示された装置の等価回路は第２図に示される如
くであり、一対の電極２の間には導電性誘電体をなす水
溶性油１による抵抗分子と静電容ｉｃとが並列的に存在
するが抵抗ｒが小さいため、高周波では容量Ｃの依存性
はほとんどない。The equivalent circuit of the device shown in Fig. 1 is as shown in Fig. 2. Between a pair of electrodes 2, a resistance molecule made of water-soluble oil 1, which forms a conductive dielectric, and an electrostatic capacitance IC are connected in parallel. However, since the resistance r is small, there is almost no dependence on the capacitance C at high frequencies.
第１図において、ｖｉ電極の直径を２０＋＋／ｍ、電極
ギャップを１ｍ／ｆｆｉとして、容器に新油の水−グラ
イコール作動油を入れた時、電極２間の電気抵抗は常温
で約１００Ωとなる。そこで、電極２とコンデンサ３と
の等価回路を示すと第２図に様になり、前述した如く水
溶性油１の電気抵抗は極めて小さく、高周波における水
溶性油１の静電容量Ｃのインピーダンスは極めて大きく
なるため、等価回路における静電容量Ｃの影響はほとん
ど無視できる。従って、前記等価回路は水溶性油１の抵
抗ｒとコンデンサ３とによるフィルタ回路が形成される
。そこで、該等価回路においてコンデンサ３の値を０，
０５μＦ、０．１μＦ、０．２μＦとし、高周波電＃４
から一定電圧Ｖｉの入力を印加し、該高周波電圧Ｖｉの
周波数を変化させた時、コンデンサ３の両端から出力さ
れる高周波電圧Ｖ！の変化を第３図に示す、第３図から
明らかなように、第２図の等価回路ではローパスフィル
タの減衰特性が得られる。コンデンサ３のインピーダン
スＺ１は、コンデンサ３の客員をＣＩとすると係は、
となる０例えばｒ＝Ｚｌの時、■１は０ 、５ Ｖ ｉ
となり入力Ｖｉが１／２に減衰することになる。第３図
においては、ＣＩ＝０．０５μＦ〜０，２μＦの時、約
１０ＫＨ２〜５０ＫＨ２の間で、（１）式で表わされる
如く出力Ｖ１が大きく変化する。すなわち、コンデンサ
３の容量ＣＩの大きさによって、フィルタ回路の減衰特
性が大きく変化し、特にｒ＝ＺＩとなるような周波数で
は急激な減衰特性を示す。In Figure 1, when the diameter of the vi electrode is 20++/m, the electrode gap is 1 m/ffi, and fresh water-glycol hydraulic oil is put into the container, the electrical resistance between electrodes 2 is about 100Ω at room temperature. Become. Therefore, the equivalent circuit of the electrode 2 and the capacitor 3 is shown in Figure 2.As mentioned above, the electrical resistance of the water-soluble oil 1 is extremely small, and the impedance of the capacitance C of the water-soluble oil 1 at high frequencies is Since the capacitance C becomes extremely large, the influence of the capacitance C on the equivalent circuit can be almost ignored. Therefore, in the equivalent circuit, a filter circuit is formed by the resistor r of the water-soluble oil 1 and the capacitor 3. Therefore, in the equivalent circuit, the value of capacitor 3 is set to 0,
05μF, 0.1μF, 0.2μF, high frequency electric #4
When a constant voltage Vi is applied from , and the frequency of the high-frequency voltage Vi is changed, the high-frequency voltage V! output from both ends of the capacitor 3. As is clear from FIG. 3, the equivalent circuit of FIG. 2 provides attenuation characteristics of a low-pass filter. The impedance Z1 of the capacitor 3 is, if the passenger of the capacitor 3 is CI, then 0 For example, when r = Zl, ■1 is 0, 5 V i
Therefore, the input Vi is attenuated to 1/2. In FIG. 3, when CI=0.05 .mu.F to 0.2 .mu.F, the output V1 changes greatly between approximately 10 KH2 and 50 KH2, as expressed by equation (1). That is, the attenuation characteristic of the filter circuit changes greatly depending on the size of the capacitance CI of the capacitor 3, and exhibits a rapid attenuation characteristic particularly at a frequency where r=ZI.
そこで第３図の特性から、前記第２図において、コンデ
ンサ３の容量Ｃ１を一定値とし、水溶性油１の抵抗ｒが
変化すれば、前記（１）式からも計算される如く、第３
図と同様な減衰特性が得られると予測される。そこで、
前記第２図において、コンデンサ３の容量をＣＩ＝０．
１μＦに設定し、水溶性油１の性状を変え、その電気抵
抗ｒを変えた場合の周波数特性を第４図に示す。第４図
において小さい煮丸印は水−グライコール作動油の新油
、ばつ印は劣化生成物が増加した油、三角印は水分が４
０％から３０％に減少した油、四角中は油中の添加剤（
油の酸化を防止するアルカリ性の添加物）が１／２に減
少した油の各々の周波数特性を示す。Therefore, from the characteristics shown in FIG. 3, in FIG. 2, if the capacitance C1 of the capacitor 3 is a constant value and the resistance r of the water-soluble oil 1 changes, the 3rd
It is predicted that attenuation characteristics similar to those shown in the figure will be obtained. Therefore,
In FIG. 2, the capacitance of the capacitor 3 is set to CI=0.
FIG. 4 shows the frequency characteristics when the electrical resistance r is changed by setting the resistance to 1 μF and changing the properties of the water-soluble oil 1. In Figure 4, the small boiled circles are new water-glycol hydraulic fluids, the crosses are oils with increased deterioration products, and the triangles are oils with increased water content.
Oil decreased from 0% to 30%, squares indicate additives in the oil (
The frequency characteristics of each oil are shown in which the content of alkaline additives (alkaline additives that prevent oil oxidation) is reduced to 1/2.
図からも明らかなように、水溶性油の性状によって、そ
の周波数減衰特性が大きく変化し、例えば周波数１０Ｋ
Ｈ２〜５０ＫＨ２の間では、油の性状によって出力■１
の値が大きく変化する。すなわち、前記（１）式におい
て水溶性油の性状によってその抵抗ｒが大きく変化する
ため、抵抗ｒの変化に比例して出力ｖ１が変化する。従
って、本発明の如く、電解質性の水溶性油の性状測定に
おいて、水溶性油に電気分解を生じさせることなく、そ
の性状に対応した電気抵抗を測定できる。すなわち、一
対の電極２に介在させた水溶性油１とコンデンサ３とに
よってフィルタ回路を形成し、該フィルタ回路に高周波
電圧を印加した時、該フィルタ回路の高周波減衰特性が
急激に変化する周波数帯域の周波数に前記高周波電源４
を設定することにより、前記水溶性油の性状に応じて変
化するコンデンサ３の両端から出力される高周波電圧出
力ｖ１を交流−直流変換器によって、直流電圧信号に変
換し、新油における測定値すなわち基準値と比較するこ
とによって、水溶性油１の性状変化を検知できるもので
ある。As is clear from the figure, the frequency attenuation characteristics vary greatly depending on the properties of the water-soluble oil.
Between H2 and 50KH2, output ■1 depending on the oil properties.
The value of changes significantly. That is, in equation (1), the resistance r changes greatly depending on the properties of the water-soluble oil, so the output v1 changes in proportion to the change in the resistance r. Therefore, as in the present invention, when measuring the properties of electrolytic water-soluble oil, it is possible to measure the electrical resistance corresponding to the properties of the water-soluble oil without electrolyzing the water-soluble oil. That is, when a filter circuit is formed by a water-soluble oil 1 and a capacitor 3 interposed between a pair of electrodes 2, and a high frequency voltage is applied to the filter circuit, the frequency band in which the high frequency attenuation characteristic of the filter circuit changes rapidly. the high frequency power supply 4 at a frequency of
By setting , the high-frequency voltage output v1 output from both ends of the capacitor 3, which changes depending on the properties of the water-soluble oil, is converted into a DC voltage signal by an AC-DC converter, and the measured value for new oil, i.e. By comparing with the reference value, changes in the properties of the water-soluble oil 1 can be detected.
従って当手法は、測定対象となる油に十分な高周波電流
を流し、電気分解を生じさせない状態で、その電気抵抗
を測定できるものであり、導電性水溶液の低抵抗測定手
段として有用である。Therefore, this method can measure the electrical resistance of the oil to be measured without causing electrolysis by passing a sufficient high-frequency current through the oil, and is useful as a means of measuring low resistance of conductive aqueous solutions.
表示器７は、本実施例においては直流電圧計によって構
成されており、第５図に示されるごとくその表示器７の
目盛はある幅を待った設定値による合格域７１の前後に
不合格域７２．７３が設けられている。そして、表示器
７の指針７４が目盛７１〜７３のいずれかを指示可能に
配設されている。In this embodiment, the display 7 is constituted by a DC voltmeter, and as shown in FIG. 5, the scale of the display 7 has a pass range 71 based on a set value within a certain width, and a fail range 72 . 73 are provided. A pointer 74 of the display 7 is arranged to be able to indicate any one of the scales 71 to 73.
第１図の構成、第３図、第４図の特性を有する本発明の
水溶性油の性状検出装置の具体的な計測例を第６図に示
す、水−グライコール系の水溶性油について、４０％の
水分を有する新油および水分が約２０％と約３０％に減
少したもの、および劣化物が混入したものをオイルサン
プルとして、本発明の適応性を確認するため使用油およ
び新油との比較を行なった。この適応性の実験は、入力
電圧ｖｉの電圧を５■、高周波電源４の周波数を１０Ｋ
Ｈｚとし、電極２の間隔を１．５＋＋＋−とし、コンデ
ンサ３の静電容量を０．２μＦとして行った。実験結果
は第６図に示されるごとくであり、次のような結果が得
られた。（１）油中水分の減少に比例して出力電圧ｖ１
は低下する。これは、新油に比べ抵抗値が大きくなった
ためと評価される。A specific measurement example of the water-soluble oil property detection device of the present invention having the configuration shown in FIG. 1 and the characteristics shown in FIGS. 3 and 4 is shown in FIG. 6 for water-glycol type water-soluble oil. , new oil with 40% water content, oil samples with reduced water content of about 20% and 30%, and oil samples contaminated with degraded products. A comparison was made with. In this adaptability experiment, the voltage of the input voltage vi was 5μ, and the frequency of the high frequency power source 4 was 10K.
Hz, the interval between the electrodes 2 was 1.5+++-, and the capacitance of the capacitor 3 was 0.2 μF. The experimental results are shown in FIG. 6, and the following results were obtained. (1) Output voltage v1 is proportional to the decrease in water content in oil.
decreases. This is believed to be due to the increased resistance value compared to new oil.
（２）使用油や劣化物混入のサンプルは、新油より出力
電圧ｖ１が大きくなる。この実験結果は、使用または劣
化物混入による酸化生成物の増加により、油の導電性が
大きくなり抵抗値が低下したためと評価される９以上の
実験結果によるごとく、高周波電源４の周波数、コンデ
ンサ３の静電容量、電極２の間隔などの測定条件を選択
すれば、水分の減少、添加剤の減少、および劣化物の増
加などによる水溶性油の性状変化を高精度で測定できる
ことが判明した。(2) The output voltage v1 of used oil or a sample containing degraded substances is higher than that of new oil. This experimental result is estimated to be due to the increase in oxidation products due to use or contamination of deteriorating substances, which increases the conductivity of the oil and decreases the resistance value. It has been found that changes in the properties of water-soluble oil due to decreases in water content, decreases in additives, increases in deterioration products, etc. can be measured with high accuracy by selecting measurement conditions such as the capacitance of , the spacing between electrodes 2, etc.
次に水−グライコール作動油の性状変化を定量的に測定
するために用いられている分析手法（指標として水分、
アルカリ価、ｐＨ値）の総合的な評価と本発明の性状検
出装置による測定結果との対応をとった一例を第７図に
示す。Next, we will discuss the analytical methods used to quantitatively measure changes in the properties of water-glycol hydraulic fluids (water and glycol as indicators).
FIG. 7 shows an example of the correspondence between the comprehensive evaluation (alkali value, pH value) and the measurement results by the property detection device of the present invention.
いくつかのオイルサンプルにおける水分、アルカリ価お
よびｐＨ値の分析値から次式により各指環の基準値に対
する許容偏差値く％）をそれぞれ求め、各偏差値の絶対
値合計と、性状検出装置による測定電圧との相関を求め
た結果を第７図に示す。From the analytical values of water content, alkaline value, and pH value of several oil samples, the allowable deviation value (%) from the standard value of each ring is calculated using the following formula, and the absolute value of each deviation value is calculated using a property detection device. FIG. 7 shows the results of determining the correlation with voltage.
例えば水−グライコール作動油では水分は４０％上３％
、ｐＨ値は１０±１、アルカリ価は１５０±２０ （Ｈ
ｃｌ ｍｌ／ １００ ＋ａｉ）の値が一般的に使われ
ている。For example, water-glycol hydraulic fluid has a water content of 40% to 3%.
, pH value is 10±1, alkaline value is 150±20 (H
cl ml/100 + ai) is generally used.
例えば、水分３８％の場合の偏差値は、となり、アルカ
リ価１３０の場合の偏差値は、となる。For example, the deviation value when the moisture content is 38% is as follows, and the deviation value when the alkaline value is 130 is as follows.
第７図の結果から、水−グライコール作動油において次
の４項目の事柄が判明した。第一に、偏差値が２０％以
上の場合は、水分、アルカリ価およびｐＨ値などの分析
値のいずれかが基準値範囲を外れる。第二には、偏差値
が１０〜２０％の場合は、分析値のいずれかが基準値範
囲に近くなっている。第三に、偏差値が１０以下の場合
には、すべての分析値が基準値範囲以内にある。第四に
、偏差値と出力電圧の測定値との相関は良好であり、そ
の測定値が３，０〜３．４ （Ｖ）の範囲にあれば正常
であると云い得る。From the results shown in FIG. 7, the following four items were found regarding the water-glycol hydraulic oil. First, if the deviation value is 20% or more, any of the analytical values such as moisture content, alkali value, and pH value will be out of the standard value range. Secondly, if the deviation value is 10 to 20%, one of the analyzed values is close to the reference value range. Thirdly, if the deviation value is 10 or less, all the analyzed values are within the reference value range. Fourthly, the correlation between the deviation value and the measured value of the output voltage is good, and if the measured value is in the range of 3.0 to 3.4 (V), it can be said to be normal.
「効果」
以上述べたごとく、本発明水溶性油の性状検出装には上
記の構成を有するから、水溶性油の水分の減少および劣
化物の増大を双方共に、簡易にかつ適確に検出し判定す
ることができるという優れた効果がある。"Effect" As stated above, since the water-soluble oil property detection device of the present invention has the above configuration, it can easily and accurately detect both the decrease in water content and the increase in degraded products in water-soluble oil. It has the excellent effect of being able to make judgments.
更に本発明による性状検出装置は、小型、軽量で簡便な
構造とすることが極めて容易であるため、水溶性作動油
などが使用されている油圧作動装置などの現場で作動油
の性状を即座に測定することが可能である。Furthermore, the property detection device according to the present invention is extremely easy to make into a small, lightweight, and simple structure, so it can be used to instantly check the properties of hydraulic fluid at the site of hydraulic equipment where water-soluble hydraulic fluid is used. It is possible to measure.
更に本発明の水溶性油の性状検出装置は、高周波の大電
流を測定すべき水溶性油に印加できるため、低抵抗を示
す電解質の水溶性油であっても、高周波電源の出力を低
下を招くことなく安定した状態で、かつ水溶性油に電気
分解などを発生させることなく、安定に該水溶性油の性
状変化に伴う電気抵抗変化を検出することが可能である
。Furthermore, since the water-soluble oil property detection device of the present invention can apply a large high-frequency current to the water-soluble oil to be measured, it is possible to prevent the output of the high-frequency power supply from decreasing even when the water-soluble oil has an electrolyte that exhibits low resistance. It is possible to stably detect a change in electrical resistance due to a change in the properties of a water-soluble oil in a stable state without causing electrolysis or the like in the water-soluble oil.
又、水溶性油の低抵抗の測定は、一対の電極間の水溶性
油による抵抗ｒと、前記＠極に直列接続するコンデンサ
ＣＩとによって、フィルタ回路を構成し、該フィルタ回
路の高周波における急激な減衰特性を有効に利用するこ
とによって行なわれ、水溶性油の性状変化に伴う微小な
抵抗変化を顕著に検出することが可能である。In addition, to measure the low resistance of water-soluble oil, a filter circuit is configured by the resistance r caused by the water-soluble oil between a pair of electrodes and a capacitor CI connected in series with the @ pole, and This is done by effectively utilizing the damping characteristics of water-soluble oil, and it is possible to noticeably detect minute changes in resistance due to changes in the properties of water-soluble oil.
なお、本発明の水溶性油の性状検出装置において、第１
図に示した電極２とコンデンサ３との接続を入れかえて
も同様にフィルタ回路が構成され、前記第３図、第４図
とは逆特性、すなわち、バイパスフィルタ特性を示すの
みであり、水溶性油の性状変化によって周波数特性が変
化を呈することは云うまでもない。In addition, in the water-soluble oil property detection device of the present invention, the first
Even if the connection between the electrode 2 and the capacitor 3 shown in the figure is changed, the filter circuit is constructed in the same way, and the filter circuit only shows the opposite characteristics to those shown in FIGS. 3 and 4, that is, bypass filter characteristics. It goes without saying that the frequency characteristics change due to changes in the properties of the oil.
第１図は本発明の性状検出装置の実施例を示すブロック
図、第２図は等価回路を示す回路図、第３図は等価回路
の周波数特性を示す特性図、第４図は水溶性油の性状に
よる周波数特性図、第５図は実施例による表示方法を示
す正面図、第６図は測定例を示す特性図、第７図はオイ
ルサンプルの分析値の偏差値に対する測定例を示す特性
図である。
１９０．水溶性油、 ２１１．電極、 ３．１．コンデ
ンサ、 ４３１．高周波電源、 ６１０．交流−直流変
換器、 ７１２０表示器。Fig. 1 is a block diagram showing an embodiment of the property detection device of the present invention, Fig. 2 is a circuit diagram showing an equivalent circuit, Fig. 3 is a characteristic diagram showing the frequency characteristics of the equivalent circuit, and Fig. 4 is a water-soluble oil FIG. 5 is a front view showing the display method according to the example, FIG. 6 is a characteristic diagram showing a measurement example, and FIG. 7 is a characteristic diagram showing a measurement example for the deviation value of the analysis value of an oil sample. It is a diagram. 190. water-soluble oil, 211. Electrode, 3.1. capacitor, 431. High frequency power supply, 610. AC-DC converter, 7120 display.
Claims (1)
装置において、水溶性油中に配設する一対の電極と、該
電極と直列に接続され、電極間の水溶性油の抵抗とによ
つてフィルタ回路を形成するコンデンサと、前記電極お
よびコンデンサの両端に接続され、高周波発振回路と電
力増幅器とから成る高周波電源と、前記コンデンサまた
は電極間の抵抗の両端に生ずる高周波電圧値を検出し、
直流電圧信号に変換する交流−直流変換回路と、該変換
回路出力を水溶性油の性状変化と対応させて表示する表
示部とから構成されることを特徴とする水溶性油の性状
検出装置。A conductive water-soluble oil property detection device used in a hydraulic actuator includes a pair of electrodes disposed in the water-soluble oil, and a resistance of the water-soluble oil between the electrodes connected in series with the electrodes. Detects a high-frequency voltage value generated across a capacitor forming a filter circuit, a high-frequency power supply connected to the electrode and both ends of the capacitor, and consisting of a high-frequency oscillation circuit and a power amplifier, and a resistor between the capacitor or the electrodes. death,
A water-soluble oil property detection device comprising: an AC-DC conversion circuit that converts into a DC voltage signal; and a display unit that displays the output of the conversion circuit in correspondence with changes in the properties of the water-soluble oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24391786A JPS6396546A (en) | 1986-10-14 | 1986-10-14 | Characteristic detector for water soluble oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24391786A JPS6396546A (en) | 1986-10-14 | 1986-10-14 | Characteristic detector for water soluble oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6396546A true JPS6396546A (en) | 1988-04-27 |
| JPH0567175B2 JPH0567175B2 (en) | 1993-09-24 |
Family
ID=17110935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24391786A Granted JPS6396546A (en) | 1986-10-14 | 1986-10-14 | Characteristic detector for water soluble oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6396546A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09196877A (en) * | 1996-01-18 | 1997-07-31 | Toyota Central Res & Dev Lab Inc | Cleaning liquid contamination degree inspection device |
| WO2022249755A1 (en) * | 2021-05-27 | 2022-12-01 | 株式会社Moresco | Monitoring and diagnosing device, monitoring and diagnosing system, and monitoring and diagnosing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885314A (en) * | 1981-11-17 | 1983-05-21 | Nissan Motor Co Ltd | Deterioration detector of engine oil |
-
1986
- 1986-10-14 JP JP24391786A patent/JPS6396546A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5885314A (en) * | 1981-11-17 | 1983-05-21 | Nissan Motor Co Ltd | Deterioration detector of engine oil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09196877A (en) * | 1996-01-18 | 1997-07-31 | Toyota Central Res & Dev Lab Inc | Cleaning liquid contamination degree inspection device |
| WO2022249755A1 (en) * | 2021-05-27 | 2022-12-01 | 株式会社Moresco | Monitoring and diagnosing device, monitoring and diagnosing system, and monitoring and diagnosing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0567175B2 (en) | 1993-09-24 |
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