JPS6046407A - Ultrasonic type measuring method of thickness of plastic cable sheath - Google Patents
Ultrasonic type measuring method of thickness of plastic cable sheathInfo
- Publication number
- JPS6046407A JPS6046407A JP58153974A JP15397483A JPS6046407A JP S6046407 A JPS6046407 A JP S6046407A JP 58153974 A JP58153974 A JP 58153974A JP 15397483 A JP15397483 A JP 15397483A JP S6046407 A JPS6046407 A JP S6046407A
- Authority
- JP
- Japan
- Prior art keywords
- sheath
- cable sheath
- thickness
- plastic cable
- plastic
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
- G01B17/025—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness for measuring thickness of coating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、超音波を利用してプラスチックケーブルシー
スの肉厚を測定する超音波式プラスチックケーブルシー
ス肉厚測定方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ultrasonic plastic cable sheath thickness measuring method that uses ultrasonic waves to measure the wall thickness of a plastic cable sheath.
（従来技術）
プラスチックケーブルシースの肉厚を超音波を利用して
測定する方法がある。この方法は、第１図に示すように
超音波トランスデユーサ−１から超音波をパルス状にケ
ーブル２のプラスチックケーブルシース３の表面に発射
し、第２図に示すようにプラスチックケーブルシース３
の表面からの表面エコー０１ と、プラスチックケーブ
ルシース３の底面からの底面エコーｅ２との時間差Ｔを
言１測し、次式からプラスチックケーブルシース３の肉
厚りを測定している。(Prior art) There is a method of measuring the wall thickness of a plastic cable sheath using ultrasonic waves. In this method, an ultrasonic transducer 1 emits pulsed ultrasonic waves onto the surface of a plastic cable sheath 3 of a cable 2 as shown in FIG.
The time difference T between the surface echo 01 from the surface of the plastic cable sheath 3 and the bottom echo e2 from the bottom surface of the plastic cable sheath 3 is measured, and the thickness of the plastic cable sheath 3 is measured from the following equation.
Ｄ−Ｔ−Ｖ−Ｔ
たｙし、■はブシスチックケーブルシース３中での音速
上式かられかるように、肉厚りは音速に依存するが、音
速Ｖはプラスチックケーブルシース３の温度によって変
化するため、プラスチックケーブルシース３の温度が正
確にわからないと正確な肉厚測定ができない。DT V Since the temperature of the plastic cable sheath 3 changes, accurate wall thickness measurement cannot be performed unless the temperature of the plastic cable sheath 3 is accurately known.
プラスチックケーブルシース３は、押出機クロスヘッド
でケーブルコアの外周に押出し被覆され、次に冷却水槽
の中に送り込まれ冷却される。超音波による測定は、音
波の伝播条件が良い水中での測定が好ましく、このため
従来は冷却水槽中に超音波トランスジューサー１を入れ
て測定していた。The plastic cable sheath 3 is extruded and coated around the cable core in an extruder crosshead and then fed into a cooling water bath for cooling. Ultrasonic measurements are preferably carried out underwater where the propagation conditions for sound waves are good, and for this reason conventionally the ultrasonic transducer 1 has been placed in a cooling water tank for measurements.
そしてプラスチックケーブルシース３の温度を知るだめ
の対策として、冷却水の温度を測定し、水温からプラス
チックケーブルシース３の温度を推定することによシ補
正を行っていた。In order to know the temperature of the plastic cable sheath 3, the temperature of the cooling water is measured and the temperature of the plastic cable sheath 3 is estimated from the water temperature to make corrections.
しかしながら、押出機クロスヘッドで１６０℃以上の高
温度で押出し被覆されたプラスチックケーブルシース３
が冷却されてゆく途中の温度はプラスチックケーブルシ
ース３内のケーブルコアの状態、外径等によシ異なシ、
また周方向にも温度変化があることから、冷却水でプラ
スチックケーブルシース３の温度を正確に推定すること
は難しく、正確なシース肉厚をめることができない欠点
があった。However, the plastic cable sheath 3 is extruded and coated at high temperatures above 160°C in an extruder crosshead.
The temperature during cooling varies depending on the condition of the cable core inside the plastic cable sheath 3, the outer diameter, etc.
Furthermore, since there is a temperature change in the circumferential direction, it is difficult to accurately estimate the temperature of the plastic cable sheath 3 using cooling water, and there is a drawback that it is not possible to accurately estimate the sheath wall thickness.
（発明の目的ン
本発明の目的は、プラスチックケーブルシースの肉厚を
容易に正確に測定することができる超音波式プラスチッ
クケーブルシース肉厚測定方法を提供するにある。(Object of the Invention) An object of the present invention is to provide an ultrasonic plastic cable sheath wall thickness measuring method that can easily and accurately measure the wall thickness of a plastic cable sheath.
（発明の構成）
本発明は、プラスチック材の温度とこのプラスチック材
中の音速との関係が第３図に示すよう双曲線状の特性と
なっており、プラスチック材の温度が約１２０℃以上で
音速がほぼ一定となる点に着目し、プラスチックケーブ
ルシースの温度が約１２０℃以上の箇所で超音波による
肉厚の測定を行うことを特徴とするものである。(Structure of the Invention) According to the present invention, the relationship between the temperature of a plastic material and the speed of sound in this plastic material has a hyperbolic characteristic as shown in FIG. This method is characterized by the fact that the thickness of the plastic cable sheath is measured using ultrasonic waves at a point where the temperature of the plastic cable sheath is approximately 120° C. or higher.
このようにして測定を行うと、プラスチッククープルシ
ース３内での超音波の音速がほぼ一定力ので、その肉厚
の測定を温度に影響されずに正確に行うことができる。When the measurement is performed in this manner, the sound velocity of the ultrasonic wave within the plastic couple sheath 3 is a substantially constant force, so that the wall thickness can be accurately measured without being affected by temperature.
（実施例〉
以下本発明の実施例を第４図及び第５図を参照して詳細
に説明する。図示のようにケーブルコア４は押出機クロ
スヘッド５に入シその外周にプラスチックケーブルシー
ス３が押出し被覆される。(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5. As shown in the figure, a cable core 4 is inserted into an extruder crosshead 5, and a plastic cable sheath 3 is attached to the outer periphery of the cable core 4. is extrusion coated.
得られたケーブル６は、次に冷却水槽７に通されてその
中の冷却水８で冷却され、巻取機で巻取られる。プラス
チックケーブルシース３の温度が約１２０℃以上の箇所
に超音波式肉厚測定器９を設置する。この測定器９は、
ケーブル６を通過させる四角形のフレームｌＯの各辺に
プラスチックケーブルシース３に対向させて超音波トラ
ンスデユーサ−ＩＡ〜１Ｄを取付け、得られる表面エコ
ーｅ１と底面エコー０２ とを測定器本体１１に与えて
プラスチックケーブルシース３の各部の肉厚を測定する
。このようにして測定すると、プラスチックケーブルシ
ース３の温度は約１２０℃以上であるので、プラスチッ
クケーブルシース３の温度による音速の変化は無視でき
、正確な肉厚測定を行うことができる。また、四方から
肉厚の測定を行うと、偏肉の状態も知ることができる。The obtained cable 6 is then passed through a cooling water tank 7, cooled by cooling water 8 therein, and wound up by a winding machine. An ultrasonic thickness measuring device 9 is installed at a location where the temperature of the plastic cable sheath 3 is approximately 120° C. or higher. This measuring device 9 is
Ultrasonic transducers IA to 1D are attached to each side of a rectangular frame IO through which the cable 6 passes, facing the plastic cable sheath 3, and the obtained surface echo e1 and bottom echo 02 are applied to the measuring instrument main body 11. Measure the wall thickness of each part of the plastic cable sheath 3. When measured in this manner, the temperature of the plastic cable sheath 3 is about 120° C. or higher, so changes in the sound speed due to the temperature of the plastic cable sheath 3 can be ignored, and accurate wall thickness measurement can be performed. Furthermore, by measuring the wall thickness from all sides, it is possible to determine the state of uneven thickness.
（発明の効果）
以上説明したように本発明に係る超音波式プラスチック
ケーブルシース肉厚測定方法は、プラスチックケーブル
シースの温度が約１２０℃以上の箇所で超音波による肉
厚の測定を行うので、プラスチックケーブルシースがこ
のような温度状態におる範囲では温度による音速の変化
ははぼ無視することができ、正しい肉厚の測定を容易に
行うことができる。(Effects of the Invention) As explained above, the ultrasonic plastic cable sheath wall thickness measurement method according to the present invention uses ultrasonic waves to measure the wall thickness at a location where the temperature of the plastic cable sheath is about 120°C or higher. In the range where the plastic cable sheath is in such a temperature state, changes in the speed of sound due to temperature can be almost ignored, and the correct wall thickness can be easily measured.
第１図は超音波による肉厚の測定の原理を示す説明図、
第２図はプラスチックケーブルシースからのエコーの状
態を示す波形図、第３図は本発明の詳細な説明するプラ
スチック材の温度と音速との関係を示す線図、第４図は
本発明の方法を実施する装置の一例を示す平面図、第５
図は本発明で用いている装置の概略構成を示すブロック
図である。
１、ＩＡ〜ＩＤ・・・超音波トランスデユーサ−１２・
・・ケーブル、３・・・プラスチックケーブルシース、
４・・・ケーブルコア、５・・・押出機クロスヘッド、
６・・・ケーブル、７・・・冷却水槽、８・・・冷却水
、９・・・超音波式肉厚測定器、１０・・・フレーム、
１１・・・測定器本体。Figure 1 is an explanatory diagram showing the principle of measuring wall thickness using ultrasonic waves.
Fig. 2 is a waveform diagram showing the state of echoes from the plastic cable sheath, Fig. 3 is a diagram showing the relationship between the temperature of the plastic material and the speed of sound, which explains the present invention in detail, and Fig. 4 is the method of the present invention. A plan view showing an example of a device for carrying out the fifth
The figure is a block diagram showing a schematic configuration of the device used in the present invention. 1, IA~ID...Ultrasonic transducer-12.
... Cable, 3... Plastic cable sheath,
4... Cable core, 5... Extruder cross head,
6... Cable, 7... Cooling water tank, 8... Cooling water, 9... Ultrasonic wall thickness measuring device, 10... Frame,
11... Measuring instrument body.
Claims (1)
されたプラスチックケーブルシースの肉厚を超音波で測
定する超音波式プラスチックケーブルシース肉厚測定方
法において、前記プラスチックケーブルシースの温度が
約１２０℃以上のところで超音波による肉厚測定を行う
ことを特徴とする超音波式プラスチックケーブルシース
肉厚測定方法。In an ultrasonic plastic cable sheath thickness measurement method in which the thickness of a plastic cable sheath extruded and coated on the outer periphery of a cable core with an extruder crosshead is measured using ultrasonic waves, the temperature of the plastic cable sheath is about 120°C or higher. By the way, an ultrasonic plastic cable sheath wall thickness measuring method is characterized in that the wall thickness is measured using ultrasonic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58153974A JPS6046407A (en) | 1983-08-23 | 1983-08-23 | Ultrasonic type measuring method of thickness of plastic cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58153974A JPS6046407A (en) | 1983-08-23 | 1983-08-23 | Ultrasonic type measuring method of thickness of plastic cable sheath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6046407A true JPS6046407A (en) | 1985-03-13 |
| JPH0129402B2 JPH0129402B2 (en) | 1989-06-09 |
Family
ID=15574143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58153974A Granted JPS6046407A (en) | 1983-08-23 | 1983-08-23 | Ultrasonic type measuring method of thickness of plastic cable sheath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572361A (en) * | 1991-10-17 | 1996-11-05 | Minolta Camera Kabushiki Kaisha | Binocular system with automatic diopter power adjustment |
| US5822115A (en) * | 1995-02-15 | 1998-10-13 | Iiyama-Cosina Co., Ltd. | Thin adjustable binoculars |
| US5974885A (en) * | 1997-01-06 | 1999-11-02 | Concurrent Technologies Corporation | Method and apparatus for measuring silver sheath thickness during drawing of high temperature superconducting wire |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52108154A (en) * | 1976-03-09 | 1977-09-10 | Sumitomo Electric Ind Ltd | Ultrasonic wave thickness measuring device |
| JPS6017308A (en) * | 1983-07-11 | 1985-01-29 | Showa Electric Wire & Cable Co Ltd | Method for measuring coat thickness of cable |
-
1983
- 1983-08-23 JP JP58153974A patent/JPS6046407A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52108154A (en) * | 1976-03-09 | 1977-09-10 | Sumitomo Electric Ind Ltd | Ultrasonic wave thickness measuring device |
| JPS6017308A (en) * | 1983-07-11 | 1985-01-29 | Showa Electric Wire & Cable Co Ltd | Method for measuring coat thickness of cable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572361A (en) * | 1991-10-17 | 1996-11-05 | Minolta Camera Kabushiki Kaisha | Binocular system with automatic diopter power adjustment |
| US5822115A (en) * | 1995-02-15 | 1998-10-13 | Iiyama-Cosina Co., Ltd. | Thin adjustable binoculars |
| US5974885A (en) * | 1997-01-06 | 1999-11-02 | Concurrent Technologies Corporation | Method and apparatus for measuring silver sheath thickness during drawing of high temperature superconducting wire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0129402B2 (en) | 1989-06-09 |
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