JPH0619330B2 - Fluorescent magnetic powder liquid concentration meter calibration device - Google Patents
Fluorescent magnetic powder liquid concentration meter calibration deviceInfo
- Publication number
- JPH0619330B2 JPH0619330B2 JP11109886A JP11109886A JPH0619330B2 JP H0619330 B2 JPH0619330 B2 JP H0619330B2 JP 11109886 A JP11109886 A JP 11109886A JP 11109886 A JP11109886 A JP 11109886A JP H0619330 B2 JPH0619330 B2 JP H0619330B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- magnetic powder
- concentration meter
- liquid concentration
- fluorescent magnetic
- 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.)
- Expired - Fee Related
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、鋼板の蛍光磁粉探傷などにおいて用いられ
る磁粉液濃度計を校正するための装置に関する。TECHNICAL FIELD The present invention relates to a device for calibrating a magnetic particle liquid concentration meter used in, for example, fluorescent magnetic particle flaw detection of a steel sheet.
（従来の技術とその問題点） 蛍光磁粉探傷は、鋼板などの表面に形成された傷を検出
する技術として広く用いられているが、このような探傷
を精度よく行うためには、使用する磁粉液の濃度を測定
して、その濃度を所定の値に保つ必要がある。(Prior art and its problems) Fluorescent magnetic powder flaw detection is widely used as a technology for detecting flaws formed on the surface of a steel plate or the like, but in order to perform such flaw detection accurately, the magnetic powder used It is necessary to measure the concentration of the liquid and maintain it at a predetermined value.
このような目的で使用される蛍光磁粉液濃度計として、
実用性の高い装置が実公昭５８−４４３６９号公報に開
示されており、その原理は第４図に示す通りである。As a fluorescent magnetic powder liquid concentration meter used for such purposes,
A highly practical device is disclosed in Japanese Utility Model Publication No. 58-44369, and its principle is as shown in FIG.
同図において、磁粉液タンク（図示せず）から流入用パ
イプ１へ導入された磁粉液は、非鉄材からなる傾斜姿勢
の磁粉付着溝２に沿って、図中に矢印で示すように下方
へ流れ落ちる。この磁粉付着溝２の底面背部には、漏洩
磁束発生器３が設けられる。この漏洩磁束発生器３は、
第５図に示すように鉄心４にコイル５を巻いたもので、
その鉄心４のうち上記磁粉付着溝２に対向する部分には
樹脂材４ａが介装されており、その表面に凹凸部４ｂが
形成され、コイル５への通電に伴い凹凸部４ｂから発生
する漏洩磁束によって磁粉付着溝２の底面に縞状の磁束
分布６（理解を容易にするため実線で描いている）が生
じるようにされている。In the figure, the magnetic powder liquid introduced into the inflow pipe 1 from the magnetic powder liquid tank (not shown) is moved downward along the magnetic powder attachment groove 2 made of a non-ferrous material in an inclined posture as shown by an arrow in the figure. run down. A leakage magnetic flux generator 3 is provided behind the bottom surface of the magnetic powder adhesion groove 2. This leakage magnetic flux generator 3 is
As shown in FIG. 5, a coil 5 is wound around the iron core 4,
A resin material 4a is interposed in a portion of the iron core 4 facing the magnetic powder adhering groove 2, and a concavo-convex portion 4b is formed on the surface thereof, and a leakage generated from the concavo-convex portion 4b when the coil 5 is energized. The magnetic flux causes a stripe-shaped magnetic flux distribution 6 (illustrated by a solid line for easy understanding) to be generated on the bottom surface of the magnetic powder adhesion groove 2.
一方、第４図において、水銀灯７，光学フィルタ８，レ
ンズ９などからなる紫外光源１０からは、上記磁粉付着
溝２の磁束分布６の発生部に向けて紫外線が照射され
る。このため、磁粉液中の磁粉が上記磁束分布６の発生
部に磁気的に付着しているときには、その付着磁粉は照
射される紫外光によって蛍光を発生する。そしてこの蛍
光を、光学フィルタ１１，レンズ１２，光電変換素子１
３（たとえばフォトダイオード）などからなる受光部１
４で受光して、その光電変換出力を信号処理回路（図示
せず）で処理することにより、蛍光の強度が検出され
る。この蛍光の強度から、上記磁束分布６の発生部での
磁粉量が検出され、これによって磁粉液における磁粉濃
度が測定される。On the other hand, in FIG. 4, an ultraviolet light source 10 including a mercury lamp 7, an optical filter 8, a lens 9 and the like radiates ultraviolet rays toward a portion where the magnetic flux distribution 6 of the magnetic powder adhering groove 2 is generated. Therefore, when the magnetic powder in the magnetic powder liquid is magnetically attached to the generation portion of the magnetic flux distribution 6, the attached magnetic powder emits fluorescence due to the irradiated ultraviolet light. Then, this fluorescence is converted into an optical filter 11, a lens 12, and a photoelectric conversion element 1.
Light receiving unit 1 including 3 (for example, a photodiode)
The intensity of the fluorescence is detected by receiving light at 4 and processing the photoelectric conversion output by a signal processing circuit (not shown). From the intensity of this fluorescence, the amount of magnetic powder at the generation portion of the magnetic flux distribution 6 is detected, and the magnetic powder concentration in the magnetic powder liquid is measured by this.
第６図は、上記装置を具体化した一例の一部を破断して
示す側面図であり、この装置１７では、周囲からの光に
よって測定結果に誤差が生じないように、前記各部材は
ハウジング１５の中に収納されている。FIG. 6 is a side view showing a part of an example embodying the above device in a broken manner. In this device 17, each member is a housing so that an error does not occur in a measurement result due to light from the surroundings. It is stored in 15.
ところで、このような蛍光磁粉液濃度計は温度や湿度な
どの変化が激しい工場内などにおいて使用されるため、
これらの環境の変化によって受光部１４や信号処理回路
などの特性はかなり不安定なものとなる。また、このよ
うな特性の変化を生ぜしめる他の要因として外乱ノイズ
なども存在するため、これらの各要因に対して完全な対
策を講ずることは実際上不可能である。特に、これらの
要因による特性変化は年単位のような長周期のものでは
なく、日単位や時間単位であることが多いため、何らか
の対策をとらなければ、日毎に測定精度がばらついてし
まうことになる。そこで、このような多様な要因に基づ
く濃度計の測定誤差を解消するためには、濃度計の校正
を行うのが有効である。By the way, since such a fluorescent magnetic powder liquid concentration meter is used in a factory where the temperature and humidity change drastically,
Due to these changes in the environment, the characteristics of the light receiving unit 14 and the signal processing circuit become considerably unstable. Further, since there are disturbance noises and the like as other factors that cause such a change in characteristics, it is practically impossible to take complete measures against each of these factors. In particular, the characteristic changes due to these factors are not long cycle like yearly, but are often day or hourly, so if some measures are not taken, the measurement accuracy will vary from day to day. Become. Therefore, in order to eliminate the measurement error of the densitometer based on such various factors, it is effective to calibrate the densitometer.
その校正の一方式として、前述した付着磁粉が発する蛍
光の光量を予め用意した基準光と比較することにより、
受光部１４の出力を補正することが考えられる。しかし
ながら、上記した付着磁粉からの蛍光は１０-2lX（ルク
ス）オーダの微弱光であり、これに見合うような再現性
のよい基準光を現実に求めることは現状では不可能であ
る。As one of the calibration methods, by comparing the amount of fluorescence emitted by the above-mentioned adhered magnetic powder with reference light prepared in advance,
It is conceivable to correct the output of the light receiving unit 14. However, the above-mentioned fluorescence from the adhered magnetic powder is weak light of the order of 10 -2 lX (lux), and it is impossible at present to actually obtain a reference light with good reproducibility that matches this.
（発明の目的） この発明は従来技術における上述の問題の克服を意図し
ており、蛍光磁粉液濃度計の環境外乱要因などによる測
定精度の変動を簡単に校正でき、構成も極めて簡単な蛍
光磁粉液濃度計校正装置を提供することを目的とする。(Object of the Invention) The present invention is intended to overcome the above-described problems in the prior art, and can easily calibrate fluctuations in measurement accuracy due to environmental disturbance factors of a fluorescent magnetic powder liquid concentration meter, and has an extremely simple configuration. An object of the present invention is to provide a liquid concentration meter calibration device.
（目的を達成するための手段） 上述の目的を達成するため、この発明においては、基準
光源からの照射光の光路の途中にその光量を可変調整す
る光量調整器を設けるとともに、この光量調整器を通過
した後の照射光量を基準光量測定器で測定し、また上記
光量調整器を通過した後の照射光を光導波路により蛍光
磁粉液濃度計の受光部にも導けるようにしている。(Means for Achieving the Purpose) In order to achieve the above-mentioned object, in the present invention, a light quantity adjuster for variably adjusting the light quantity is provided in the optical path of the irradiation light from the reference light source, and the light quantity adjuster is provided. The amount of irradiation light after passing through is measured by a reference light amount measuring device, and the irradiation light after passing through the above light amount adjusting device can be guided to the light receiving portion of the fluorescent magnetic powder liquid concentration meter by an optical waveguide.
（実施例） 第１図はこの発明の一実施例である蛍光磁粉液濃度計校
正装置１６と、この装置１６によって校正の行われる蛍
光磁粉液濃度計１７とを示す概略図である。(Embodiment) FIG. 1 is a schematic view showing a fluorescent magnetic powder liquid concentration meter calibration device 16 which is an embodiment of the present invention and a fluorescent magnetic powder liquid concentration meter 17 which is calibrated by the device 16.
上記蛍光磁粉液濃度計校正装置１６は、ハロゲンランプ
などの紫外線ランプからなる基準紫外光源１８、この基
準紫外光源１８からの照射光の光量を可変調整する光量
調整器１９、この光量調整器１９を通過した後の照射光
量を測定する基準光量測定器２０などにより構成されて
いる。The fluorescent magnetic powder liquid concentration meter calibration device 16 includes a reference ultraviolet light source 18 including an ultraviolet lamp such as a halogen lamp, a light amount adjuster 19 for variably adjusting the light amount of the irradiation light from the reference ultraviolet light source 18, and the light amount adjuster 19. It is configured by a reference light amount measuring device 20 and the like that measures the irradiation light amount after passing.
上記基準紫外光源１８には、蛍光磁粉液濃度計１７にお
ける付着磁粉から発生する１０-2lXオーダの微弱な蛍光
より十分光量の大きい例えば１〜１０lX程度の紫外線ラ
ンプが使用される。この基準紫外光源１８からの照射光
は、光導波路２１ａを介して上記光量調整器１９に導か
れる。光量調整器１９は、ここでは暗箱１９ａ内に複数
枚の光学フィルタ１９ｂを抜差し可能に配列して構成さ
れ、上記光学フィルタ１９ｂの差入れ枚数を加減するこ
とにより、この光量調整器１９を透過する照射光の光量
が調整される。As the reference ultraviolet light source 18, an ultraviolet lamp of, for example, about 1 to 10 lX, which has a sufficiently large amount of light than the weak fluorescence of the order of 10 -2 lx generated from the adhered magnetic particles in the fluorescent magnetic particle liquid concentration meter 17, is used. The irradiation light from the reference ultraviolet light source 18 is guided to the light amount adjuster 19 via the optical waveguide 21a. The light quantity adjuster 19 is configured by arranging a plurality of optical filters 19b in a dark box 19a so that the optical filters 19b can be inserted and removed. The amount of light is adjusted.
光量調整器１９を透過した照射光は、光導波路２１ｂを
介して光量分配器２２へ導かれる。この光量分配器２２
は、ここでは暗箱２２ａ内にハーフミラー２２ｂを設け
て構成され、この光量分配器２２に導入される照射光量
のうち、1/2は光導波路２１ｃを介して前記基準光量測
定器２０へ、また他の1/2は光導波路２１ｄへそれぞれ
分配される。基準光量測定器２０は光電変換器などから
なり、ここに導入された照射光量は電気信号として測定
される。なお、光導波路２１ａ〜２１ｄとしては、中空
管状体や光ファイバなどを用いることができる。The irradiation light that has passed through the light quantity adjuster 19 is guided to the light quantity distributor 22 via the optical waveguide 21b. This light quantity distributor 22
Here, the half mirror 22b is provided in the dark box 22a, and half of the irradiation light quantity introduced into the light quantity distributor 22 is sent to the reference light quantity measuring device 20 via the optical waveguide 21c, and The other 1/2 is distributed to the optical waveguide 21d. The reference light amount measuring device 20 is composed of a photoelectric converter or the like, and the irradiation light amount introduced therein is measured as an electric signal. A hollow tubular body or an optical fiber can be used as the optical waveguides 21a to 21d.
上記装置１６による蛍光磁粉液濃度計１７の校正はつぎ
のようにして行われる。この校正は、たとえば毎日の操
業開始前に１回行なえばよい。The fluorescent magnetic powder liquid concentration meter 17 is calibrated by the device 16 as follows. This calibration may be performed once, for example, before the start of daily operation.
まず、蛍光磁粉液濃度計１７からその受光部１４を取り
外して、これを蛍光磁粉液濃度計校正装置１６の光導波
路２１ｄ側に接続する。なお、この受光部１４には、従
来と同様に光学フィルタやレンズ等も組込まれている
が、図示の便宜上光電変換素子１３のみが描かれてい
る。First, the light receiving portion 14 is removed from the fluorescent magnetic powder liquid concentration meter 17 and is connected to the optical waveguide 21d side of the fluorescent magnetic powder liquid concentration meter calibration device 16. It should be noted that although an optical filter, a lens, and the like are incorporated in the light receiving unit 14 as in the conventional case, only the photoelectric conversion element 13 is shown for convenience of illustration.
上記セット状態のもとで、光量調整器１９の光学フィル
タ１９ｂの枚数を加減して、光量調整器１９を透過する
光量を順次変えてゆく。そして、それぞれの透過光量に
対する基準光量測定器２０の出力値と、これに対応する
上記受光部１４の出力値とを、例えば第２図に示すよう
な直角座標上にプロットする。そして上記受光部１４の
出力が正しく調整されているときのこの直角座標上での
基準特性線Ｃに対して、上記プロットが偏っていないか
どうか検討し、偏りがあればそのプロットが上記基準特
性線上に乗るように受光部２３の出力レベルを補正す
る。すなわち、蛍光磁粉液濃度校正装置１６内の光電変
換器等と、蛍光濃度計１７の受光部１４との出力関係が
線形関係となっている場合には、上記受光部１４や信号
処理回路における特性変化はないものと判断し、線形関
係からずれている場合には特性変化が生じているものと
考えて、そのずれ量に応じた補正を行なうわけである。
この場合、蛍光磁粉液濃度校正装置１６内の光電変換器
として、受光部１４の内部の光電変換素子１３よりも特
性が安定したものを用いる。そうすれば、基準特性線Ｃ
からのずれは、主として蛍光磁粉液濃度計１７側で生じ
ているものと考えることができるために、蛍光磁粉液濃
度計１７の出力補正によって校正を行なうことができ
る。もっとも、双方が同程度の安定度を有する場合にお
いても、各出力値に対応するプロット点が基準特性線Ｃ
上に乗るように補正を行なえば、双方に相関関係（比例
関係）を持たせることができるわけであるから、蛍光磁
粉液濃度１７を相対的に校正することが可能となる。以
上の手順により、蛍光磁粉液濃度計１７の校正が果され
る。そして、その後は、受光部１４を蛍光磁粉液濃度計
１７に再セットして、濃度測定を行なう。Under the above set state, the number of optical filters 19b of the light quantity adjuster 19 is adjusted, and the quantity of light transmitted through the light quantity adjuster 19 is sequentially changed. Then, the output value of the reference light amount measuring device 20 for each transmitted light amount and the corresponding output value of the light receiving unit 14 are plotted on the rectangular coordinates as shown in FIG. 2, for example. Then, it is examined whether or not the plot is biased with respect to the reference characteristic line C on this rectangular coordinate when the output of the light receiving unit 14 is properly adjusted. The output level of the light receiving unit 23 is corrected so as to be on the line. That is, when the output relationship between the photoelectric converter or the like in the fluorescent magnetic powder concentration calibrating device 16 and the light receiving unit 14 of the fluorescence densitometer 17 is a linear relationship, the characteristics of the light receiving unit 14 and the signal processing circuit are described. It is determined that there is no change, and if it deviates from the linear relationship, it is considered that a characteristic change has occurred, and correction is performed according to the amount of deviation.
In this case, as the photoelectric converter in the fluorescent magnetic powder concentration calibrating device 16, one having more stable characteristics than the photoelectric conversion element 13 inside the light receiving part 14 is used. Then, the reference characteristic line C
Since it can be considered that the deviation from is mainly caused on the side of the fluorescent magnetic powder liquid concentration meter 17, the calibration can be performed by correcting the output of the fluorescent magnetic powder liquid concentration meter 17. However, even when both have the same degree of stability, the plot point corresponding to each output value is the reference characteristic line C.
If the correction is performed so as to be on the upper side, it is possible to make both have a correlation (proportional relation), so that it is possible to relatively calibrate the fluorescent magnetic powder liquid concentration 17. The fluorescent magnetic powder liquid concentration meter 17 is calibrated by the above procedure. Then, after that, the light receiving unit 14 is reset to the fluorescent magnetic powder liquid concentration meter 17 to measure the concentration.
この実施例では、光量調整器１９を通過した照射光量を
光量分配器２２で基準光量測定器２０と受光部１４とに
分配するように構成しているため、基準光量測定器２０
の出力と受光部１４の出力とを同時測定することが可能
であり、それによって、基準紫外光源１８の光量変化に
左右されることなく適正な校正が可能となる。もっと
も、基準紫外光源１８の光量変化が無視できる場合に
は、前述した光量分配器２２は、導入される照射光量の
全量を基準光量測定器２０と受光部２３とに交互に切り
替えて導入するように構成することもできる。In this embodiment, the irradiation light amount that has passed through the light amount adjuster 19 is configured to be distributed to the reference light amount measuring device 20 and the light receiving section 14 by the light amount distributor 22, and therefore, the reference light amount measuring device 20.
Can be simultaneously measured with the output of the light receiving unit 14, and thereby an appropriate calibration can be performed without being influenced by the change in the light amount of the reference ultraviolet light source 18. However, when the change in the light amount of the reference ultraviolet light source 18 can be ignored, the light amount distributor 22 described above alternately introduces the entire amount of irradiation light to be introduced into the reference light amount measuring device 20 and the light receiving unit 23. It can also be configured to.
第３図はこの発明の蛍光磁粉液濃度計校正装置の他の実
施例を示す概略図である。FIG. 3 is a schematic view showing another embodiment of the fluorescent magnetic powder liquid concentration meter calibration apparatus of the present invention.
この装置１６では、光導波路２１ｂが直接蛍光磁粉液濃
度計１７の受光部２３に接続され、校正を行なうごとに
受光部２３を蛍光磁粉液濃度計１７から取り外さなくて
よいように構成されている。すなわち、この実施例で
は、受光部２３の筒状ハウジング２３ａの側壁に開口を
設けて光導波路２１ｄの端部２６をこの開口に接続する
とともに、光導波路２１ｄと受光部２３との接続部付近
にはシャッタ２４を設ける。そして、校正を行うときだ
けこのシャッタ２４を開放して、光導波路２１ｄからの
光を受光部２３へ導入する。一方、受光部２３内には光
導波路２１ｄから導入される光を光電変換素子２３ａ側
に向けるための光路切替器２５が設けられている。この
光路切替器２５は、たとえば回転ミラーなどによって構
成されており、校正時には実線で図示した角度に配向さ
れて光導波路２１ｄからの光を光電変換素子１３へと与
える。また、蛍光磁粉液濃度計１７が濃度測定に使用さ
れるときには、第３図に破線で示すように観測すべき蛍
光が上記光電変換素子２３ａへ導入されるのをさまたげ
ない姿勢に切り替えられる。そのほかの構成と使用法と
は先の実施例と同様であり、同一構成部には同一符号を
付して説明を省略する。In this device 16, the optical waveguide 21b is directly connected to the light receiving portion 23 of the fluorescent magnetic powder liquid concentration meter 17, and the light receiving portion 23 does not have to be removed from the fluorescent magnetic powder liquid concentration meter 17 each time calibration is performed. . That is, in this embodiment, an opening is provided in the side wall of the cylindrical housing 23a of the light receiving section 23 to connect the end 26 of the optical waveguide 21d to this opening, and in the vicinity of the connecting portion between the optical waveguide 21d and the light receiving section 23. Is provided with a shutter 24. Then, the shutter 24 is opened only when the calibration is performed, and the light from the optical waveguide 21d is introduced into the light receiving unit 23. On the other hand, an optical path switch 25 for directing the light introduced from the optical waveguide 21d to the photoelectric conversion element 23a side is provided in the light receiving section 23. The optical path switch 25 is composed of, for example, a rotating mirror, and is oriented at the angle shown by the solid line during calibration to apply the light from the optical waveguide 21d to the photoelectric conversion element 13. Further, when the fluorescent magnetic powder liquid concentration meter 17 is used for concentration measurement, it is switched to a posture in which the fluorescence to be observed is not prevented from being introduced into the photoelectric conversion element 23a as shown by the broken line in FIG. The other configurations and usages are the same as those of the previous embodiment, and the same components are designated by the same reference numerals and the description thereof will be omitted.
この実施例の場合には、受光部２３を濃度測定時の配設
位置に固定したままで校正が行なわれるため、受光部２
３の状態を変化させずに校正を行なうことが可能とな
る。特に、蛍光磁粉液濃度計１７に内蔵されている水銀
灯７（第４図）からの熱によって受光部２３の温度は上
昇するが、第３図の装置では、この温度上昇による影響
（温度ドリフトなど）も取込んだ校正が行なわれること
になる。なお、光導波路２１ｄの先端２６を受光部２３
に対して着脱自在にしておけば、１個の校正装置１６を
用いて複数の蛍光磁粉液濃度計１７を順次校正すること
も可能となる。In the case of this embodiment, since the calibration is performed while the light receiving section 23 is fixed at the arrangement position at the time of concentration measurement, the light receiving section 2
It is possible to perform the calibration without changing the state of 3. In particular, the temperature of the light receiving section 23 rises due to the heat from the mercury lamp 7 (FIG. 4) built in the fluorescent magnetic particle liquid concentration meter 17, but in the device of FIG. ) Will be included in the calibration. The tip 26 of the optical waveguide 21d is connected to the light receiving portion 23
In contrast, if it is detachable, it is possible to sequentially calibrate a plurality of fluorescent magnetic powder liquid concentration meters 17 using one calibration device 16.
（発明の効果） 以上説明したように、この発明によれば、基準光源から
の照射光の光量を光量調整器で可変調整して、その光量
調整された照射光を基準光量測定器と蛍光磁粉液濃度計
の受光部とに導くようにしているため、校正のための基
準光源として、蛍光磁粉液濃度計において付着磁粉の発
する蛍光に見合うような微弱な光源を用意する必要がな
く、環境外乱要因などによる蛍光磁粉液濃度計の測定精
度の変動を、簡単な構成により容易な操作で精度よく行
うことができるという効果が得られる。(Effect of the Invention) As described above, according to the present invention, the light quantity of the irradiation light from the reference light source is variably adjusted by the light quantity adjuster, and the light quantity adjusted irradiation light is used as the reference light quantity measuring device and the fluorescent magnetic powder. Since it is led to the light receiving part of the liquid concentration meter, it is not necessary to prepare a weak light source that matches the fluorescence emitted by the adhered magnetic particles in the fluorescent magnetic particle liquid concentration meter as a reference light source for calibration, and there is no environmental disturbance. It is possible to obtain an effect that the measurement accuracy of the fluorescent magnetic powder liquid concentration meter can be accurately changed by factors such as a simple configuration and an easy operation.
第１図はこの発明の一実施例の概略図、 第２図は実施例の基準光量測定器と受光部の出力の関係
をプロットしたグラフ、 第３図はこの発明の他の実施例の概略図、 第４図は蛍光磁粉液濃度計の原理を示す斜視図、 第５図は第４図に示した濃度計の漏洩磁束発生器の斜視
図、 第６図は蛍光磁粉液濃度計の具体的構造の一例の一部を
破断して示す側面図である。 １８……基準紫外光源、１９……光量調整器、 ２０……基準光量測定器、２１ｄ……光導波路FIG. 1 is a schematic view of an embodiment of the present invention, FIG. 2 is a graph plotting the relationship between the reference light amount measuring device of the embodiment and the output of the light receiving portion, and FIG. 3 is a schematic view of another embodiment of the present invention. Fig. 4, Fig. 4 is a perspective view showing the principle of the fluorescent magnetic powder liquid concentration meter, Fig. 5 is a perspective view of the leakage magnetic flux generator of the concentration meter shown in Fig. 4, and Fig. 6 is a concrete example of the fluorescent magnetic powder liquid concentration meter. It is a side view which fractures | ruptures and shows a part of example of the dynamic structure. 18: reference ultraviolet light source, 19: light intensity adjuster, 20: reference light intensity measuring device, 21d: optical waveguide
Claims (1)
光路の途中に設けられて前記照射光の光量を可変調整す
る光量調整器と、前記光量調整器を通過した後の照射光
の光量を測定する基準光量測定器と、前記光量調整器を
通過した後の照射光を蛍光磁粉液濃度計の受光部へ導く
光導波路とを備えることを特徴とする蛍光磁粉液濃度計
校正装置。1. A reference light source, a light amount adjuster which is provided in the optical path of the irradiation light from the reference light source and variably adjusts the light amount of the irradiation light, and an irradiation light after passing through the light amount adjuster. A fluorescent magnetic powder liquid concentration meter calibration device, comprising: a reference light amount measuring device for measuring the amount of light; and an optical waveguide for guiding the irradiation light after passing through the light amount adjusting device to a light receiving portion of the fluorescent magnetic powder liquid concentration meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11109886A JPH0619330B2 (en) | 1986-05-14 | 1986-05-14 | Fluorescent magnetic powder liquid concentration meter calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11109886A JPH0619330B2 (en) | 1986-05-14 | 1986-05-14 | Fluorescent magnetic powder liquid concentration meter calibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62266453A JPS62266453A (en) | 1987-11-19 |
| JPH0619330B2 true JPH0619330B2 (en) | 1994-03-16 |
Family
ID=14552335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11109886A Expired - Fee Related JPH0619330B2 (en) | 1986-05-14 | 1986-05-14 | Fluorescent magnetic powder liquid concentration meter calibration device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619330B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007093249A (en) * | 2005-09-27 | 2007-04-12 | Yokogawa Electric Corp | Light quantity measuring device and light quantity measuring method |
| JP2010281842A (en) * | 2010-09-24 | 2010-12-16 | Yokogawa Electric Corp | Light quantity measuring device and light quantity measuring method |
-
1986
- 1986-05-14 JP JP11109886A patent/JPH0619330B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62266453A (en) | 1987-11-19 |
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