JPS6047922A - Telemetering apparatus for water meter - Google Patents

Telemetering apparatus for water meter

Info

Publication number
JPS6047922A
JPS6047922A JP58155770A JP15577083A JPS6047922A JP S6047922 A JPS6047922 A JP S6047922A JP 58155770 A JP58155770 A JP 58155770A JP 15577083 A JP15577083 A JP 15577083A JP S6047922 A JPS6047922 A JP S6047922A
Authority
JP
Japan
Prior art keywords
light
water meter
meter
water
meter reading
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
Application number
JP58155770A
Other languages
Japanese (ja)
Inventor
Hajime Onoda
元 小野田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KINMON SEISAKUSHO KK
Original Assignee
KINMON SEISAKUSHO KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KINMON SEISAKUSHO KK filed Critical KINMON SEISAKUSHO KK
Priority to JP58155770A priority Critical patent/JPS6047922A/en
Publication of JPS6047922A publication Critical patent/JPS6047922A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/07Integration to give total flow, e.g. using mechanically-operated integrating mechanism
    • G01F15/075Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means
    • G01F15/0755Integration to give total flow, e.g. using mechanically-operated integrating mechanism using electrically-operated integrating means involving digital counting

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Flowmeters (AREA)

Abstract

PURPOSE:To miniaturize a water meter without impairing the advantage of a telemetering system by connecting a metering section for displaying the integrated measured value of the water meter at a remote section with a light transmission path. CONSTITUTION:A light transmission path 3 in which a light transmission system comprising an optical fiber cable 18 having a plurality of fibers bundled and a light receiving system comprising the identicsal fiber cable 19 are wrapped with a flexible light shielding sheath 20 is fixed to a metering section 2 aligning the optical paths. Light is projected on a rotary reflection body 15 of a water meter 1, enters the light receiving system at an interval of 1/6 rotation due to the action of varying the angle of reflection of light on a hexahedron as accompanied by the rotation thereof and then, received with the metering section 2. Since the rotary reflection body 15 rotates at the speed corresponding to the flow rate of water, the integrated counts of pulse-like optical signals detected by the metering section 2 correspond to the amount of water used.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、安全性の向上および水道メータの小型化を図
れるようにした水道メータ遠隔検針装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a remote water meter reading device that is capable of improving safety and downsizing the water meter.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

従来よシ、水道メー タの検針は、検針員が各需要家を
巡回し、水道メータに組込まれている演算カウンタの値
を視認して行なっていた。しかしながら、このような検
針方式にあってId。
Traditionally, water meter readings were carried out by meter readers who visited each customer and visually checked the values on the calculation counters built into the water meters. However, with this meter reading method, Id.

多くの人手を必要とするうえ、極めて非能率的である。It requires a lot of manpower and is extremely inefficient.

そこで最近では、たとえば集合住宅などで、水道メータ
遠隔検測装置を用いた効率的な検針方式が採用されるよ
うになってきた。
Therefore, recently, for example, in apartment complexes, efficient water meter reading methods using remote water meter inspection devices have been adopted.

遠隔検針方式は、各需要家側に設置された水道メータと
、これら水道メータとは離れだ場所に設置された集中検
針部とを、信号伝送路を介して接続し、各水道メータの
積算計量値を集中検針部で一括して検針するものである
。このような装置を用いることによって集中的な検針が
可能となシ、検針の能率向上にも非常に寄与することに
なった。
The remote meter reading method connects water meters installed at each consumer side and a central meter reading section installed at a location away from these water meters via a signal transmission line, and calculates the cumulative meter readings of each water meter. Meter values are read all at once at a central meter reading section. The use of such a device makes it possible to perform intensive meter reading, which greatly contributes to improving the efficiency of meter reading.

ところで、居住空間の効率的な利用という観点から考え
ると、この種の水道メータ類は、できる限シ小壓にして
、メータ類の占有空間を最不眠に抑えたいという要望が
ある。ところが上述の水道メータ遠隔検針装置にあって
は、各水道メータに信号伝送のための送信回路と、この
回路を駆動するだめの電源とを組込む必要がある。この
ため、水道メータが従来に比して大型化してしまうとい
う問題があった。
By the way, from the viewpoint of efficient use of living space, there is a desire to make this type of water meter as small as possible to minimize the space occupied by the meter. However, in the water meter remote meter reading device described above, it is necessary to incorporate a transmitting circuit for signal transmission and a power source for driving this circuit into each water meter. For this reason, there was a problem in that the water meter was larger than the conventional one.

また、一般にこのような水道メータは、ガスメータや電
気メータとともに、狭い空間内に−まとめで収納するこ
とが多い。このため、ガスメータの近傍には、前述の電
源が配置されることになる。このような場合、万一、ガ
スメータからガス漏れが発生したときでも、電源部から
のスパーク等でガスに着火しないような、特別の配慮が
必要となる。したがって、このような点からも水道メー
タの大型化および複雑化を招くという問題があった。
Further, such water meters are generally often housed together in a narrow space together with gas meters and electricity meters. Therefore, the above-mentioned power supply is placed near the gas meter. In such a case, special consideration must be taken to ensure that even if gas leaks from the gas meter, the gas will not be ignited by sparks from the power source. Therefore, also from this point of view, there is a problem in that the water meter becomes larger and more complicated.

〔発明の目的〕[Purpose of the invention]

本発明は、かかる問題点に基づきなされたものであpl
その目的とするところは、遠隔検針方式の利点を損うこ
となしに、水道メータの小型化が図れ、しかも安全性に
優れた水道メータ遠隔検針装置を提供することにある。
The present invention has been made based on such problems.
The purpose is to provide a remote water meter reading device that can reduce the size of the water meter without sacrificing the advantages of the remote meter reading method and has excellent safety.

〔発明の概要〕[Summary of the invention]

本発明は、水道メータと、この水道メータの積算計量値
を遠隔部にて表示する検針部とを光伝送路で接続したこ
とを特徴としている。そして、上記水道メータ内に、水
の通流に応動する運動体に連結させて光変調手段を設け
、この光変調手段に上記光伝送路を介して検針部から投
光し、この光を上記光伝送路を介して検針部に設けた受
光部で受光している。そして検針部は、この受光した光
信号に基づいて積算計量値を得るようにしている。
The present invention is characterized in that a water meter and a meter reading section that remotely displays the integrated measured value of the water meter are connected via an optical transmission line. A light modulation means is provided in the water meter connected to a moving body that responds to the flow of water, and light is emitted from the meter reading section to the light modulation means via the optical transmission path, and this light is transmitted to the water meter. The light is received by a light receiving section provided in the meter reading section via an optical transmission line. Then, the meter reading section obtains an integrated measurement value based on the received optical signal.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、検針部と水道メータとを光伝送路で接
続し、この光伝送路への投光と、光伝送路からの受光と
、受光信号に基づく信号処理とを全て検測部側で行なっ
ている。このため、水道メータ側には、−切電気回路を
設ける必要がない。したがって、水道メータ内に電気回
路およびこの電気回路を駆動するための電源を組込むよ
うにした従来の装置に較べて水道メータの小型化を図れ
るとともに安全性の向上化を図ることができる。しかも
、この場合には、単に光伝送路を既存の水道メータ本体
の特定箇所に接続すれば足υ、既存の水道メータをその
ま寸利用することができるので、実用性は極めて高い。
According to the present invention, the meter reading unit and the water meter are connected through an optical transmission line, and the measuring unit performs all of the projecting of light onto the optical transmission line, the reception of light from the optical transmission line, and the signal processing based on the received light signal. It's done on the side. Therefore, there is no need to provide a negative electrical circuit on the water meter side. Therefore, compared to conventional devices in which an electric circuit and a power source for driving the electric circuit are built into the water meter, the water meter can be made smaller and its safety can be improved. Moreover, in this case, the existing water meter can be used as is by simply connecting the optical transmission line to a specific location on the existing water meter body, so the practicality is extremely high.

また、本発明では、光信号として伝送しているのでtW
=ノイズの影響を受けることがない。
In addition, in the present invention, since it is transmitted as an optical signal, tW
= Not affected by noise.

このため、M算計量値の信頼性も極めて高いものとなる
Therefore, the reliability of the M calculation metric value is also extremely high.

〔発明の実施例〕[Embodiments of the invention]

以下、不発明の詳細を図示の実施例に基づき説明する。 Hereinafter, details of the invention will be explained based on illustrated embodiments.

第1図において、1は個々の需要家に据え個けられた水
道メータであシ、2はこの水道メータ1に対して遠隔の
地に設置された検針部である。これら水道メータ1と検
針部2とは光伝送路3によって光結合されている。
In FIG. 1, 1 is a water meter installed at each customer, and 2 is a meter reading unit installed at a location remote from the water meter 1. These water meter 1 and meter reading section 2 are optically coupled via an optical transmission line 3.

しかして、検釦部2には、発光器5と受光器6とが設け
られておシ、また水道メータ1内には、水の通流に応動
して回転する擬素に連結させて光変調器7が設けられて
いる。そして、発光器5から出た光を光伝送路3を介し
て光変NM器7に導き、さらに変調された光を光伝送路
3を介して受光器6へ導くようにしている。光変調器7
は、たとえば第2図に示すように、水道メータIの導入
口10かも排出口1ノへの水の通流によって回転する羽
根車12に、ギア列13を介して接続された回転体14
に設けられたル「開パイロットと呼ばれる先端切欠六角
錐状の光年的回転反射体15にて構成されている。
The detection button section 2 is provided with a light emitter 5 and a light receiver 6, and inside the water meter 1, a light is connected to a pseudo element that rotates in response to the flow of water. A modulator 7 is provided. The light emitted from the light emitter 5 is guided to the optical modulator NM device 7 via the optical transmission line 3, and the modulated light is further guided to the light receiver 6 via the optical transmission line 3. Optical modulator 7
For example, as shown in FIG. 2, a rotating body 14 is connected via a gear train 13 to an impeller 12 that rotates as water flows through the inlet 10 and the outlet 1 of the water meter I.
It consists of a light-year rotating reflector 15 with a hexagonal pyramid shape with a notched tip called an open pilot.

−万、光伝送路3は、複数本のファイバーを束ねた光フ
アイバケーブル18からなる送光系統と、同党ファイバ
ケーブル19からなる受光系統とを可撓性しゃ光外皮2
0によって被包l〜てケーブル状に構成されている。こ
の光伝送路3の検針側端部は、発光器5と送光系統の光
フアイバケーブル18との光軸を一致させ、寸だ、受光
器6と受光系統の光フアイバケーブル19との光軸を一
致させる関係に検針部2に固定されている。また光伝送
路3の水道メータ1側端部では、各ルファイバケーブル
18.19が、光軸位置決め部材26に穿設された2つ
の孔部に装着されておシ、この位置決め部材26は光フ
アイバケーブル18から出た光を前記回転反射体15の
前面透光壁27を介して上記回転反射体15で反射させ
、この反射光を上記透光壁27を再び通過させて光フア
イバケーブル19に入射させ得る関係にケース28に固
定具29を介して固定されている。したがって、受光器
6には、光変調器7で変調された流量に対応するパルス
列信号が導入されることになる。々お、検針部2には、
上記受光器6からのパルス列信号を波形整形する波形整
形回路30と、この回路30からのパルスを計数する積
算カウンタ3ノと、この積算カウンタ31の出力データ
を表示する数値表示器32とが設けられている。
- The optical transmission line 3 connects a light transmitting system consisting of an optical fiber cable 18 made up of a plurality of fibers and a light receiving system consisting of an optical fiber cable 19 with a flexible light-blocking outer sheath 2.
It is constructed in the form of a cable, covered by 0. The end of the optical transmission line 3 on the meter reading side aligns the optical axes of the light emitter 5 and the optical fiber cable 18 of the light transmission system, and also aligns the optical axis of the light receiver 6 and the optical fiber cable 19 of the light reception system. are fixed to the meter-reading unit 2 in a relationship that makes them match. Furthermore, at the end of the optical transmission line 3 on the water meter 1 side, each optical fiber cable 18, 19 is attached to two holes bored in the optical axis positioning member 26, and this positioning member 26 The light emitted from the fiber cable 18 is reflected by the rotary reflector 15 through the front transparent wall 27 of the rotary reflector 15, and this reflected light is passed through the transparent wall 27 again to the optical fiber cable 19. It is fixed to the case 28 via a fixture 29 in such a manner that the light can be incident thereon. Therefore, a pulse train signal corresponding to the flow rate modulated by the optical modulator 7 is introduced into the light receiver 6 . In the meter reading section 2,
A waveform shaping circuit 30 that shapes the pulse train signal from the light receiver 6, an integration counter 3 that counts pulses from this circuit 30, and a numerical display 32 that displays the output data of the integration counter 31 are provided. It is being

しかして、このように構成された本実施例に係る水道メ
ータ遠隔検針装置にあっては、検針部2からの光が水道
メータ1の回転反射体15に投光され、この回転反射体
I5の回転に伴なう六面体上の光の反射角可変作用によ
って、]/6回転毎に上記光が受光系統へ入光し7、(
与び検針部2で受光される。上記回転反射体15は、水
の流量に応じた速度で回転するので、上記検針部2にて
検出されるパルス状の光信号のg(321計数値は水の
使用量に対応した′ものとなり、ここに遠隔検針が実現
されることになる。
Therefore, in the water meter remote meter reading device according to this embodiment configured as described above, the light from the meter reading section 2 is projected onto the rotary reflector 15 of the water meter 1, and the light from the rotary reflector I5 is projected onto the rotary reflector I5. Due to the effect of changing the reflection angle of the light on the hexahedron as it rotates, the above light enters the light receiving system every ]/6 rotations7, (
The light is then received by the meter reading section 2. Since the rotating reflector 15 rotates at a speed that corresponds to the flow rate of water, the g (321 count) of the pulsed optical signal detected by the meter reading section 2 corresponds to the amount of water used. , remote meter reading will be realized here.

そして、この場合には、水道メータ1の近傍には、全く
電気回路および、これを駆動する電源等を必要とせず、
単に光伝送路3を水道メータ本体1の回転反射体15近
傍に接続するのみである。このため、前述したようにガ
スメータに隣接させて水道メータ1を設けた場合であっ
ても安全性確保のだめの特別の配慮を講する必要はない
。しかも、水道メータ1は既存のものを使用できるので
実用性は非常に高いうえ、光伝送を行うために電磁ノイ
ズの影響も受けないなど、多大な効果を奏することがで
きる。
In this case, there is no need for an electric circuit or a power source to drive it near the water meter 1.
The optical transmission line 3 is simply connected to the vicinity of the rotating reflector 15 of the water meter main body 1. Therefore, even if the water meter 1 is installed adjacent to a gas meter as described above, there is no need to take any special precautions to ensure safety. Furthermore, since an existing water meter 1 can be used, the water meter 1 is very practical, and since optical transmission is performed, it is not affected by electromagnetic noise, so it can produce great effects.

なお、本発明は上記実施例に限定されるものではなし4
゜たとえば、上記実施例では先端切欠六角錐状の回転反
射体を光変調器として用いたが、棒状の回転体を光変調
器として用いてもよい。また、上述の例の如く反射型光
変調方式によらず、たとえば回転体に切欠部を設けて、
透過壓光変調方式を用いてもよい。要するに本発明は、
その要旨を逸脱しない範囲で種々変形が可能である。
Note that the present invention is not limited to the above embodiments4.
For example, in the above embodiment, a hexagonal pyramid-shaped rotating reflector with a notched tip was used as the optical modulator, but a rod-shaped rotating body may also be used as the optical modulator. Moreover, instead of using the reflective light modulation method as in the above example, for example, by providing a notch in the rotating body,
A transmission optical modulation method may also be used. In short, the present invention
Various modifications can be made without departing from the gist of the invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例に係る装置を概略的に示す図
、第2図は同実施例における水道メータの縦断面図であ
る。 1・・・水道メータ、2・・・検針部、3・・・光伝送
路、5・・・発光器、6・・・受光器、7・・・光変調
器、10・・・導入口、11・・・排出口、12・・・
羽根車、13・・・ギア列、14・・・回転体、15・
・・回転反射体、18.19・・・光フアイバケーブル
、26・・・位置決め部材、27・・・透光壁、28・
・・ケース、29・・・固定具。
FIG. 1 is a diagram schematically showing a device according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a water meter in the same embodiment. DESCRIPTION OF SYMBOLS 1... Water meter, 2... Meter reading part, 3... Optical transmission line, 5... Light emitter, 6... Light receiver, 7... Optical modulator, 10... Inlet , 11... discharge port, 12...
Impeller, 13... Gear train, 14... Rotating body, 15.
...Rotating reflector, 18.19...Optical fiber cable, 26...Positioning member, 27...Transparent wall, 28.
...Case, 29... Fixture.

Claims (1)

【特許請求の範囲】[Claims] 水道メータと、この水道メータの積算計量値を遠隔部に
おいて表示する検針部と、上記水道メータと検針部とを
光結合する光伝送路と、前記水道メータ内に水の通流に
応動する運動体に連結して設けられた光変調手段と、前
記検針部から前記光伝送路を介して上記光変調手段に光
を供給する発光器と、前記光変調手段からの光信号を前
記光伝送路を介して前記検針部で受光する受光器と、こ
の受光器からの受光信号に基づいて積算計量値を得る手
段とを具備したことを特徴とする水道メータ遠隔検針装
置。
A water meter, a meter reading unit that remotely displays the integrated measured value of the water meter, an optical transmission line that optically couples the water meter and the meter reading unit, and a movement that responds to the flow of water in the water meter. a light modulating means connected to the body; a light emitter that supplies light from the meter reading section to the light modulating means via the optical transmission line; A water meter remote meter reading device comprising: a light receiver that receives light at the meter reading section via the light receiver; and means for obtaining an integrated measured value based on a light reception signal from the light receiver.
JP58155770A 1983-08-26 1983-08-26 Telemetering apparatus for water meter Pending JPS6047922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58155770A JPS6047922A (en) 1983-08-26 1983-08-26 Telemetering apparatus for water meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58155770A JPS6047922A (en) 1983-08-26 1983-08-26 Telemetering apparatus for water meter

Publications (1)

Publication Number Publication Date
JPS6047922A true JPS6047922A (en) 1985-03-15

Family

ID=15613026

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58155770A Pending JPS6047922A (en) 1983-08-26 1983-08-26 Telemetering apparatus for water meter

Country Status (1)

Country Link
JP (1) JPS6047922A (en)

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FR2628525A1 (en) * 1988-03-14 1989-09-15 Gaz De France METHOD AND DEVICE FOR AUTOMATIC READING OF A MECHANICAL TIMER FLUID METER
EP0349711A2 (en) * 1988-07-08 1990-01-10 Abb Dacom S.P.A. Computer-controlled apparatus for the automatic delivery of fuel from a tanker
EP0359898A2 (en) * 1988-09-20 1990-03-28 LAMPODATA S.r.l. Device for determining the quantity of a delivered fluid
JPH02300311A (en) * 1989-05-16 1990-12-12 Asahi Chem Ind Co Ltd High-elastic modulus polyamide wiry substance and production thereof
US7056579B2 (en) 2001-08-08 2006-06-06 Toyo Boseki Kabushiki Kaisha High-strength polyethylene fiber
US7247372B2 (en) 2002-04-09 2007-07-24 Toyo Boseki Kabushiki Kaisha Polyethylene filament and a process for producing the same
US7638193B1 (en) 2006-10-10 2009-12-29 E. I. Du Pont De Nemours And Company Cut-resistant yarns and method of manufacture
US7811673B2 (en) 2003-12-12 2010-10-12 Toyo Boseki Kabushiki Kaisha High strength polyethylene fiber
CN102147279A (en) * 2011-01-13 2011-08-10 南京邦耀科技发展有限公司 Character-wheel-type meter reading method and character-wheel-type direct-reading meter
WO2014116306A1 (en) 2012-09-21 2014-07-31 E. I. Du Pont De Nemours And Company Ballistic resistant body armor articles
KR20150059752A (en) 2012-09-28 2015-06-02 도요보 가부시키가이샤 Braid
CN105571655A (en) * 2015-12-29 2016-05-11 成都兴联宜科技有限公司 Rotary wing type photoelectric direct reading teletransmission valve-controlled water meter
KR20160128535A (en) 2015-04-28 2016-11-08 한국생산기술연구원 Manufacturing method of gel for UHMWPE fabric
WO2023191902A2 (en) 2021-11-10 2023-10-05 Dupont Safety & Construction, Inc. Ballistic resistant material made of mechanically entangled woven fabrics without nonwoven fibers and method of making thereof

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JPS6366316A (en) * 1979-06-27 1988-03-25 スタミカ−ボン ビ−.ベ− Filament high in both of modulus and tensile strength
JPS62257414A (en) * 1986-05-01 1987-11-10 Mitsui Petrochem Ind Ltd Highly orientated molded article of ultra-high-molecular-weight polyethylene and production thereof
FR2628525A1 (en) * 1988-03-14 1989-09-15 Gaz De France METHOD AND DEVICE FOR AUTOMATIC READING OF A MECHANICAL TIMER FLUID METER
EP0349711A2 (en) * 1988-07-08 1990-01-10 Abb Dacom S.P.A. Computer-controlled apparatus for the automatic delivery of fuel from a tanker
EP0349711A3 (en) * 1988-07-08 1991-01-23 Abb Dacom S.P.A. Computer-controlled apparatus for the automatic delivery of fuel from a tanker
EP0359898A2 (en) * 1988-09-20 1990-03-28 LAMPODATA S.r.l. Device for determining the quantity of a delivered fluid
EP0359898A3 (en) * 1988-09-20 1990-08-16 LAMPODATA S.r.l. Device for determining the quantity of a delivered fluid
JPH02300311A (en) * 1989-05-16 1990-12-12 Asahi Chem Ind Co Ltd High-elastic modulus polyamide wiry substance and production thereof
US7056579B2 (en) 2001-08-08 2006-06-06 Toyo Boseki Kabushiki Kaisha High-strength polyethylene fiber
US7247372B2 (en) 2002-04-09 2007-07-24 Toyo Boseki Kabushiki Kaisha Polyethylene filament and a process for producing the same
US7736564B2 (en) 2002-04-09 2010-06-15 Toyo Boseki Kabushiki Kaisha Process of making a high strength polyolefin filament
US7811673B2 (en) 2003-12-12 2010-10-12 Toyo Boseki Kabushiki Kaisha High strength polyethylene fiber
US7638193B1 (en) 2006-10-10 2009-12-29 E. I. Du Pont De Nemours And Company Cut-resistant yarns and method of manufacture
CN102147279A (en) * 2011-01-13 2011-08-10 南京邦耀科技发展有限公司 Character-wheel-type meter reading method and character-wheel-type direct-reading meter
WO2014116306A1 (en) 2012-09-21 2014-07-31 E. I. Du Pont De Nemours And Company Ballistic resistant body armor articles
KR20150059752A (en) 2012-09-28 2015-06-02 도요보 가부시키가이샤 Braid
KR20160128535A (en) 2015-04-28 2016-11-08 한국생산기술연구원 Manufacturing method of gel for UHMWPE fabric
CN105571655A (en) * 2015-12-29 2016-05-11 成都兴联宜科技有限公司 Rotary wing type photoelectric direct reading teletransmission valve-controlled water meter
WO2023191902A2 (en) 2021-11-10 2023-10-05 Dupont Safety & Construction, Inc. Ballistic resistant material made of mechanically entangled woven fabrics without nonwoven fibers and method of making thereof

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