JPS63289439A - Pulp density measuring apparatus - Google Patents
Pulp density measuring apparatusInfo
- Publication number
- JPS63289439A JPS63289439A JP12348187A JP12348187A JPS63289439A JP S63289439 A JPS63289439 A JP S63289439A JP 12348187 A JP12348187 A JP 12348187A JP 12348187 A JP12348187 A JP 12348187A JP S63289439 A JPS63289439 A JP S63289439A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- pulp
- receiving antenna
- amount
- antenna
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 239000000725 suspension Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 abstract description 3
- 229920006362 Teflon® Polymers 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 230000010355 oscillation Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method 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
- 238000001514 detection method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、パルプ懸濁液が流れる配管中のバルブｌ＆Ｈ
量（パルプ濃度）を測定する手段に関する。Detailed Description of the Invention <Industrial Application Field> The present invention is directed to valves L&H in piping through which pulp suspension flows.
The present invention relates to a means for measuring the amount (pulp concentration).
〈従来技術〉
従来、パルプ濃度を測定する手段としては、ａ）剪断応
力を検出する方式
ｂ）光学式の濃度検出方式
がよく知られている。<Prior Art> Conventionally, as means for measuring pulp density, a) a method of detecting shear stress, and b) an optical density detection method are well known.
〈発明が解決しようとする問題点〉
しかしながら、これら方式は流速の影響を受ける難点が
ある。また、光学方式では色相の影響があり、さらに配
管中のパルプの挙動の影響も受けやすい。<Problems to be Solved by the Invention> However, these systems have the disadvantage of being affected by the flow velocity. Furthermore, the optical method is affected by the hue and is also susceptible to the behavior of the pulp in the piping.
本発明は従来方式のこれらの問題点を解消したパルプ濃
度測定装置の提供を目的とする。An object of the present invention is to provide a pulp density measuring device that solves these problems of the conventional method.
く問題点を解決するための手段〉
本発明の構成上の特徴は、パルプ懸濁液が流れる配管に
外部より極超短波を照射９貫通させ、その減資量の変化
を検出して配管内部の水量を測定し、その測定結果より
パルプの繊維量を算出する点にある。Means for Solving the Problems> The structural feature of the present invention is to irradiate the pipe through which the pulp suspension flows with extremely high frequency waves from the outside, detect the change in the amount of reduced capital, and determine the amount of water inside the pipe. The purpose of this method is to measure the amount of fiber in the pulp and calculate the amount of fiber in the pulp from the measurement results.
く作用〉
パルプ懸濁液が流れる配管に外部より極超短波が照射１
貫通され、その減衰量の変化より配管内部の水量が測定
され、その測定結果よりパルプのｓｕｉ量を算出される
。Effect> Extremely high frequency waves are irradiated from the outside onto the pipe through which the pulp suspension flows 1
The amount of water inside the pipe is measured based on the change in the amount of attenuation, and the sui amount of the pulp is calculated from the measurement result.
〈実施例〉
第１図に基いて本発明の詳細な説明する。１はパルプ懸
濁液Ｐが流れるフランジ部を有する金属パイプであり、
内壁にはテフロンライニン灼施されており、耐蝕性を向
上させている。<Example> The present invention will be explained in detail based on FIG. 1 is a metal pipe having a flange portion through which the pulp suspension P flows;
The inner walls are lined with Teflon to improve corrosion resistance.
３及び４は、パイプを斜めに貫く方向に対向する延長管
体であり、パイプの金属部を貫いてテフロンライニング
を介してパルプ懸濁液Ｐに接している。Reference numerals 3 and 4 designate extension pipe bodies that face each other in a direction that extends diagonally through the pipe, and which penetrate the metal part of the pipe and are in contact with the pulp suspension P via a Teflon lining.
延長管体３側において、５は極超短波の発信アンテナ、
６はマツチング装置、７は第１受信アンテナである。On the extension pipe body 3 side, 5 is an extremely high frequency transmitting antenna;
6 is a matching device, and 7 is a first receiving antenna.
延長管体４側において、８は極超短波の第２受信アンテ
ナ、９はマツチング装置である。On the side of the extension tube 4, 8 is a second receiving antenna for extremely high frequency waves, and 9 is a matching device.
１０はマグネトロンな、どで実現される極超短波発振器
であり、導波管１１を介して極超短波の電磁波を発信ア
ンテナよりパイプを斜めに貫いて第２受信アンテナ８に
向けて矢印へ方向に発信させる。Reference numeral 10 denotes an ultrahigh-frequency oscillator realized with a magnetron or the like, which emits ultrahigh-frequency electromagnetic waves through a waveguide 11 from a transmitting antenna, diagonally penetrating the pipe, and toward the second receiving antenna 8 in the direction of the arrow. let
第１受信アンテナ７の受信出力ｅ１は出力安定装置１２
に入力され、この値が一定値となるように極超短波発信
器１０の発振出力を制御する。The reception output e1 of the first reception antenna 7 is output from the output stabilizer 12.
The oscillation output of the extremely high frequency oscillator 10 is controlled so that this value becomes a constant value.
１３は極超短波発信装置１０に対する電源ユニットであ
る。13 is a power supply unit for the extremely high frequency transmitting device 10.
１４は演算手段であり、第１受信アンテナ７の受信出力
ｅ１及び第２受信アンテナ８の受信出力ｅ２を受けてパ
イプ１内の水の量を測定し、これに基づいてパルプ量ｅ
ｐを算出して指示計器１５にバルブ濃度を指示させ、又
は他の機器１６に伝送する。14 is a calculation means which measures the amount of water in the pipe 1 by receiving the reception output e1 of the first reception antenna 7 and the reception output e2 of the second reception antenna 8, and calculates the pulp amount e based on this.
p is calculated to cause the indicator 15 to indicate the valve concentration or to transmit it to another device 16.
この様な構成において、受信出力ｅ、と０２の差は、パ
イプ１内の水及びパルプ繊維による極超、 短波エネ
ルギーの減衰を測定することになり、水に比較して格段
に減衰量が大きいパルプｍｔ／＃の存在により、ｅｌと
−ｅ ２の差は大きく変化する。In such a configuration, the difference between the received outputs e and 02 is a measurement of the attenuation of extremely short wave energy due to the water and pulp fibers in the pipe 1, and the amount of attenuation is much larger than that of water. Due to the presence of pulp mt/#, the difference between el and -e 2 changes significantly.
第２図は減衰による測定′例を示す特性図であり、管内
が水のみの場合は周波数ｆ、が共振点で、Ａ点が０２と
して測定される。このとき、管内に数％のパルプ懸濁液
が含まれている場合は同一共振周波数では８点が０２と
して検出され、その差ΔｅがｍＭ量に関連した減衰量と
なる。管内に、パルプ繊維が含まれている場合は共振点
のずれが発生し、共ｊ辰点ｆ２に同調させると８点は０
点に移動するので、この場合はＡ点と０点の差Δｅ′が
繊維量に関連した減衰量となる。FIG. 2 is a characteristic diagram showing an example of measurement by attenuation. When there is only water in the pipe, the frequency f is the resonance point and the point A is measured as 02. At this time, if several percent of the pulp suspension is contained in the tube, eight points are detected as 02 at the same resonance frequency, and the difference Δe becomes the attenuation amount related to the amount of mM. If the pipe contains pulp fibers, the resonance point will shift, and when tuned to the resonance point f2, the 8 points will be 0.
In this case, the difference Δe' between point A and point 0 is the attenuation amount related to the fiber amount.
第３図（Ａ）はパルプ懸濁液の測定値ｅｐの変化例、（
Ｂ）はこの測定値に対応するパイプ１内のパルプ懸濁液
の濃度例を示すものであり、測定期間Ｔ１はパルプ懸濁
液Ｐ、はほとんど水であり、水だけの減衰が生じ、この
減衰量を基準レベルとしてパルプ８！Ｉ！￥Ｏ％とする
。Figure 3 (A) shows an example of changes in the measured value ep of pulp suspension, (
B) shows an example of the concentration of the pulp suspension in the pipe 1 corresponding to this measured value. During the measurement period T1, the pulp suspension P is mostly water, and attenuation occurs only due to water, and this Pulp 8 with attenuation as the reference level! I! ￥0%.
測定期間Ｔ２は高濃度の懸濁液Ｐ２の測定期間であり、
パルプ繊組による減衰が太き（、測定期間Ｔ１を基準と
した減衰量の算出によりパルプ濃度ｅｐが大きく増加し
ている。The measurement period T2 is a measurement period for the highly concentrated suspension P2,
The attenuation due to the pulp fibers is large (calculation of the attenuation amount based on the measurement period T1 shows that the pulp concentration ep has increased greatly.
測定期間Ｔ３は中濃度の懸濁液Ｐ３の測定期間であり、
パルプ繊維による減衰が中位であり、測定期間Ｔ１を基
準とした減衰量の算出によりパルプ濃度ｅｐが中程度に
増加している。The measurement period T3 is a measurement period for a medium concentration suspension P3,
The attenuation due to the pulp fibers is moderate, and the pulp concentration ep has increased to a moderate degree based on the calculation of the attenuation amount based on the measurement period T1.
本発明の濃度測定の原理は、水とパルプｍ維のマイクロ
波に対する吸収率の差を利用するものであり、本質的に
流体の速度に対する影響を受けない測定が可能である。The principle of concentration measurement according to the present invention is to utilize the difference in absorption rate of water and pulp m fibers to microwaves, and measurement can be performed essentially without being affected by the velocity of the fluid.
〈発明の効果〉
以上説明したように、本発明によれば流速の影響を受け
ないパルプ濃度計を比較的簡単な構成で、しかもパイプ
内にセンサーを挿入したり、光学的な測定のための流体
サンプル手段を必要としないオンラインリアルタイムの
高精痕なパルプ濃度測定を可能とするものであり、紙パ
ルプの計装の大きなネックであったパルプの濃度測定手
段の改善□に大きく貢献することができる。<Effects of the Invention> As explained above, according to the present invention, a pulp density meter that is not affected by flow rate can be constructed with a relatively simple structure, and it is also possible to insert a sensor into a pipe or use it for optical measurement. This enables online, real-time, high-precision pulp concentration measurement without the need for fluid sample means, and will greatly contribute to the improvement of pulp concentration measurement methods, which have been a major bottleneck in paper pulp instrumentation. can.
第１図は本発明の実施例を示す構成図、第２図はパルプ
繊維による減衰特性の説明図、第３図はその動作説明図
である。
１・・・パイプ ２・・パテフロンライニング ３
゜４・・・延長管体 ５・・・発信アンテナ ６，
９・・・マツチング装置 ７・・・第１受信アンテナ
８・・・第２受信アンテナ １０極超短波発振装
置１１・・・導波管 １２・・・出力安定装置 １
３・・・電源ユニット １４・・・演算手段 １５
指示計器FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the damping characteristics by pulp fibers, and FIG. 3 is an explanatory diagram of its operation. 1... Pipe 2... Putty flon lining 3
゜4... Extension pipe body 5... Transmission antenna 6,
9... Matching device 7... First receiving antenna 8... Second receiving antenna 10-pole ultrahigh frequency oscillator 11... Waveguide 12... Output stabilizer 1
3...Power supply unit 14...Calculating means 15
indicating instrument
Claims (1)
貫通させ、その減衰量の変化を検出して配管内部の水量
を測定し、その測定結果よりパルプの繊維量を算出する
ことを特徴とするパルプ濃度測定装置。Ultrahigh frequency waves are irradiated from the outside to the piping through which the pulp suspension flows.
A pulp concentration measuring device characterized by measuring the amount of water inside the pipe by penetrating the pipe, detecting a change in the amount of attenuation, and calculating the amount of fiber in the pulp from the measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12348187A JPS63289439A (en) | 1987-05-20 | 1987-05-20 | Pulp density measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12348187A JPS63289439A (en) | 1987-05-20 | 1987-05-20 | Pulp density measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63289439A true JPS63289439A (en) | 1988-11-25 |
Family
ID=14861699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12348187A Pending JPS63289439A (en) | 1987-05-20 | 1987-05-20 | Pulp density measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63289439A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999026310A1 (en) * | 1997-11-13 | 1999-05-27 | Carnegie Mellon University | Wireless signal distribution in a building hvac system |
| US5977851A (en) * | 1997-11-13 | 1999-11-02 | Carnegie Mellon University | Wireless signal distribution in a building HVAC system |
-
1987
- 1987-05-20 JP JP12348187A patent/JPS63289439A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999026310A1 (en) * | 1997-11-13 | 1999-05-27 | Carnegie Mellon University | Wireless signal distribution in a building hvac system |
| US5977851A (en) * | 1997-11-13 | 1999-11-02 | Carnegie Mellon University | Wireless signal distribution in a building HVAC system |
| US5994984A (en) * | 1997-11-13 | 1999-11-30 | Carnegie Mellon University | Wireless signal distribution in a building HVAC system |
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