JPH02227659A - Detector for partial discharge - Google Patents
Detector for partial dischargeInfo
- Publication number
- JPH02227659A JPH02227659A JP1048191A JP4819189A JPH02227659A JP H02227659 A JPH02227659 A JP H02227659A JP 1048191 A JP1048191 A JP 1048191A JP 4819189 A JP4819189 A JP 4819189A JP H02227659 A JPH02227659 A JP H02227659A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- partial discharge
- sensor
- noise
- cushion material
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 14
- 238000010073 coating (rubber) Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 230000001902 propagating effect Effects 0.000 claims description 2
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 6
- 239000005061 synthetic rubber Substances 0.000 abstract description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract description 4
- 229920001971 elastomer Polymers 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 3
- 239000005060 rubber Substances 0.000 abstract description 3
- 230000008595 infiltration Effects 0.000 abstract 2
- 238000001764 infiltration Methods 0.000 abstract 2
- 238000011109 contamination Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000012212 insulator Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、電気ケーブルの、絶縁体等の内部で発生する
部分放電を検出するための部分放電検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a partial discharge detection device for detecting partial discharge occurring inside an insulator or the like of an electric cable.
（発明の技術的背景とその課題）
絶縁体に高電圧を印加したとき、その絶縁体内部にボイ
ド等の電気的な欠陥があると、その部分に電界が集中し
て部分放電を生じる０例えば、送電用の高電圧ケーブル
の絶縁体中でそのような部分放電が生じれば、その部分
から絶縁体が劣化し、最悪の場合には絶縁破壊を生じて
しまう。(Technical background of the invention and its problems) When a high voltage is applied to an insulator, if there is an electrical defect such as a void inside the insulator, the electric field will concentrate in that part and cause a partial discharge. If such a partial discharge occurs in the insulator of a high-voltage cable for power transmission, the insulator will deteriorate from that part, and in the worst case, dielectric breakdown will occur.
これを防止するために、事前にケーブル絶縁体中に発生
している部分放電を、音響的に検出しようとする方法が
知られている。これは、非破壊検査法のうちのアコース
ティックエミッション法と呼ばれる方法である。In order to prevent this, a method is known in which a partial discharge occurring in the cable insulator is acoustically detected in advance. This is a method called an acoustic emission method among non-destructive testing methods.
一般に、部分放電を生じた場合、その放電箇所から放電
音が発生する。この放電音は、ケーブル絶縁体中を音波
として伝播する。従って、ケーブル絶縁体外周に超音波
センサのような音響検出素子を接触させておけば、部分
放電の発生箇所や、その程度を検出することができる。Generally, when a partial discharge occurs, a discharge sound is generated from the discharge location. This discharge sound propagates in the cable insulation as a sound wave. Therefore, by bringing an acoustic detection element such as an ultrasonic sensor into contact with the outer periphery of the cable insulator, it is possible to detect the location where partial discharge occurs and its degree.
ところが、このような音響的な検出を行なう場合、外部
雑音対策が特に重要な問題となる。However, when performing such acoustic detection, countermeasures against external noise become a particularly important issue.
例えば、第４図に示したように、ケーブル接続部１の外
周面に部分放電音検出用センサ２を接触させて、絶縁体
３の内部のボイド等の欠陥４において発生する部分放電
音を検出する場合を考える。For example, as shown in FIG. 4, the partial discharge sound detection sensor 2 is brought into contact with the outer peripheral surface of the cable connection part 1 to detect the partial discharge sound generated in a defect 4 such as a void inside the insulator 3. Consider a case where
この部分放電音検出用センサ２は、ケース２ａの内部に
音響センサ２ｂを収容したものである。This partial discharge sound detection sensor 2 has an acoustic sensor 2b housed inside a case 2a.
この音響センサ２ｂは、微小な放電音４ａを検出するた
めにホーン状に構成されている。This acoustic sensor 2b is configured in a horn shape in order to detect minute discharge sounds 4a.
ところが、部分放電音４ａの検出中に、外部の騒音５が
この音響センサ２ｂに検出されてしまうことがある。特
に、ケーブル接続部等の外周面には凹凸が多い、又外部
から湾曲している。従って、第５図に示したように、部
分放電音検出用センサ２との間に隙間を生じ易い、騒音
５は、この隙間から第４図に示した音響センサ２ｂに侵
入する。この場合、外部から侵入する騒音５と放電音４
ａの性質が異なることを利用して、侵入してきた騒音５
を、電気的に分離し処理することも考えられている。However, while detecting the partial discharge sound 4a, external noise 5 may be detected by the acoustic sensor 2b. In particular, the outer circumferential surface of the cable connection portion, etc., has many irregularities and is curved from the outside. Therefore, as shown in FIG. 5, the noise 5 that tends to create a gap between the sensor 2 and the partial discharge sound detection sensor 2 enters the acoustic sensor 2b shown in FIG. 4 through this gap. In this case, noise 5 entering from the outside and discharge sound 4
The intruding noise 5 takes advantage of the fact that the properties of a are different.
It is also being considered to electrically separate and process the
しかし、実際には、部分放電の測定を行なう作業者のセ
ンサの取扱い方によって、騒音５の侵入の仕方がまちま
ちとなり、−律の信号処理によってはこれを分離除去し
きれない場合がある。However, in reality, the manner in which the noise 5 enters the sensor varies depending on how the operator who measures the partial discharge handles the sensor, and it may not be possible to separate and eliminate the noise 5 by regular signal processing.
（発明の目的）
本発明は以上の点に着目してなされたもので、ケーブル
接続部外表面等の凹凸の激しい部分において、部分放電
音を検出する場合の騒音の侵入を効果的に防止した部分
放電検出装置を提供することを目的とするものである。(Objective of the Invention) The present invention has been made with attention to the above points, and it is possible to effectively prevent the intrusion of noise when detecting partial discharge sound in a highly uneven part such as the outer surface of a cable connection part. The object is to provide a partial discharge detection device.
（発明の概要）
本発明の部分放電検出装置は、対象物に対向させてその
対象物の内部を伝播する部分放電音を検出する部分放電
音検出用センサと、この部分放電音検出用センサの検出
信号を処理する信号処理回路とから成り、前記部分放電
音検出用センサには、前記対象物と対向する検出面を取
り囲む周辺部に、軟質防音ゴム被覆により包囲されたク
ッション材からなる遮音壁を設けたことを特徴とするも
のである。(Summary of the Invention) The partial discharge detection device of the present invention includes a partial discharge sound detection sensor that faces an object and detects partial discharge sound propagating inside the object, and a partial discharge sound detection sensor that The sensor for detecting partial discharge sound includes a sound insulating wall made of a cushioning material surrounded by a soft sound insulating rubber coating in a peripheral area surrounding a detection surface facing the object. It is characterized by the fact that it has been provided.
（発明の実施例） 以下、本発明を図の実施例を用いて詳細に説明する。(Example of the invention) Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.
第１図は、本発明の部分放電検出装置の実施例を示す縦
断面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of the partial discharge detection device of the present invention.
図において、この部分放電検出装置には、底面が開放さ
れたケース２ａの内部に音響センサ２ｂが収容されてい
る。この音響センサ２ｂの出力は、その外部に設けられ
た信号処理回路９により処理される構成となっている。In the figure, this partial discharge detection device includes an acoustic sensor 2b housed inside a case 2a whose bottom surface is open. The output of this acoustic sensor 2b is configured to be processed by a signal processing circuit 9 provided externally.
一方、ケース２ａの下側端面には、ちょうど部分放電音
検出用センサが対象物と対向する検出面２ｃを取り囲む
ように遮音壁８が設けられている。On the other hand, a sound insulating wall 8 is provided on the lower end surface of the case 2a so as to surround the detection surface 2c where the partial discharge sound detection sensor faces the object.
この遮音壁８は、図中の部分拡大図に示すように、軟質
防音ゴム被覆７により包囲されたクッション材６から構
成されている。このクッション材６は、例えば、スポン
ジ状のウレタンフオームから構成される。又、軟質防音
ゴム７は、柔軟性を失わない程度に薄い合成ゴム等から
成る。The sound insulating wall 8 is composed of a cushion material 6 surrounded by a soft sound insulating rubber coating 7, as shown in the partially enlarged view in the figure. This cushion material 6 is made of, for example, spongy urethane foam. The soft soundproof rubber 7 is made of synthetic rubber or the like that is thin enough not to lose its flexibility.
クッション材６は、この部分放電音検出用センサ２を対
象物に接触させる場合に、対象物に対し密着し、隙間を
無くして音の侵入を防止する役割りを果たす、しかしな
がら、クッション材のみでは、騒音レベルが６０ホ一ン
以上になると、音の侵入を防ぐ効果が低下するシス、ス
ポンジ等の多孔質材は汚れ易く、水などを吸い込み易い
、軟質防音ゴム７は、このクッション材６を完全に包囲
し、汚れ等を防止し、かつ、レベルの高い騒音を吸収す
る。尚、一般に、ウレタンフオームよりも合成ゴムの方
が防音効果が高い、ここで、合成ゴムのみで適切な防音
効果を得ようとすると、合成ゴムの厚さをある程度厚く
する必要が生じる。しかし、厚さが厚くなると全体に硬
くなり、対象物の凹凸に沿って密着させることが難しく
なる。そこで、ある程度の柔軟性を持つような厚みの軟
質防音ゴム被覆と、その内部を充填するクッション材と
を組合わせ、極めて良好な防音特性を得ている。When the partial discharge sound detection sensor 2 is brought into contact with the object, the cushioning material 6 plays the role of coming into close contact with the object and eliminating gaps to prevent sound from entering. When the noise level exceeds 60 phona, the effectiveness of preventing sound from entering decreases. Porous materials such as sponges are easily soiled and absorb water, etc. The soft soundproof rubber 7 is Completely enclosed, prevents dirt, etc., and absorbs high levels of noise. In general, synthetic rubber has a higher soundproofing effect than urethane foam, but if you try to obtain an appropriate soundproofing effect only with synthetic rubber, it will be necessary to increase the thickness of the synthetic rubber to some extent. However, as the thickness increases, the entire surface becomes harder, making it difficult to adhere closely along the unevenness of the object. Therefore, by combining a soft soundproofing rubber coating with a certain degree of flexibility and a cushioning material filling the inside, extremely good soundproofing properties are obtained.
本発明の効果を実証するため、第２図に示すように、ケ
ーブル接続部１め１面に、本発明に関わる部分放電検出
用センサ２を上記遮音壁８を介して密着させ、その外部
騒音の騒音レベルに対する測定器出力をプロットした。In order to demonstrate the effects of the present invention, as shown in FIG. The meter output was plotted against the noise level.
第３図はその結果を示すグラフである。FIG. 3 is a graph showing the results.
図において、第５図に示した従来法による測定器出力を
実線で表わした。又、本発明の装置における測定器出力
を破線で示した。In the figure, the output of the measuring device according to the conventional method shown in FIG. 5 is represented by a solid line. Moreover, the measuring device output in the apparatus of the present invention is shown by a broken line.
このように、本発明の装置においては、特に騒音レベル
が６０ホ一ン以上の範囲において、従来の場合に比べて
著しく騒音防止の効果がある。As described above, the device of the present invention has a remarkable noise prevention effect compared to the conventional case, especially in the range where the noise level is 60 phon or more.
本発明は以上の実施例に限定されない。The present invention is not limited to the above embodiments.
第１図に示した実施例では、ケース２ａの下端に環状に
遮音壁８を設けた例を示したが、遮音壁８の幅Ｔが大き
ければ大きいほど遮音効果も増し、又、対象物との密着
性も良好になる。このため、遮音壁８をそのまま広幅に
するだけでなく、装置の外壁も遮音壁を設けるために幅
を広げる等、種々の変形を行なって差し支えない、又、
遮音壁８を構成する軟質防音ゴム被覆やクッション材の
材質については、既知の種々の同等の材料に置き換えて
差し支えない。In the embodiment shown in FIG. 1, an example is shown in which the sound insulation wall 8 is provided in an annular shape at the lower end of the case 2a, but the larger the width T of the sound insulation wall 8, the greater the sound insulation effect, and the tighter contact with the object. Sexuality also improves. Therefore, in addition to making the sound insulation wall 8 wide as it is, various modifications may be made such as widening the width of the outer wall of the device to provide a sound insulation wall.
The materials of the soft soundproof rubber coating and cushioning material that constitute the soundproof wall 8 may be replaced with various known equivalent materials.
（発明の効果）
以上説明した本発明の部分放電検出装置によれば、音響
センサの周囲に軟質防音ゴム被覆により包囲されたクッ
ション材から成る遮音壁を設けたので、装置を対象物に
接触させて部分放電音を検出する作業の際、装置と対象
物の間の隙間がこの遮音壁により塞がれて騒音が遮断さ
れる。又、軟質防音ゴム被覆によって、特に高レベルの
騒音がより効果的に遮断される。その結果、微弱な部分
放電音も高感度で検出することができ、高精度の部分放
電測定を行なうことが可能になる。(Effects of the Invention) According to the partial discharge detection device of the present invention described above, since the acoustic sensor is provided with a sound insulating wall made of a cushioning material surrounded by a soft sound insulating rubber coating, the device cannot be brought into contact with an object. During work to detect partial discharge sounds, the gap between the device and the target object is closed by the sound insulating wall, thereby blocking noise. Also, the soft sound-insulating rubber coating provides more effective isolation of especially high-level noise. As a result, even weak partial discharge sounds can be detected with high sensitivity, making it possible to perform highly accurate partial discharge measurements.
第１図は本発明の部分放電検出装置の実施例を示す縦断
面図、第２図はその使用状態を説明する正面図、第３図
は本発明の装置の効果を示すグラフ、第４図は従来の部
分放電音測定方法の説明図、第５図は従来の装置の使用
状態を説明する正面図である。
２−−一一−−−−一部分放電音検出用センサ、２ ａ
−−−−−−−−ケース、
２ ｂ−−一一−−−−音響センサ、
ｃ −−−一一一−−検出面、
−一一一一一一一一クッション材、
−一一一一一一一一軟質防音ゴム被覆、−一一一一一一
一一遮音壁、
一一一一一一一一一信号処理回路。
第３図
壜ルベル（ホン）Fig. 1 is a vertical cross-sectional view showing an embodiment of the partial discharge detection device of the present invention, Fig. 2 is a front view illustrating its usage condition, Fig. 3 is a graph showing the effects of the device of the present invention, and Fig. 4 5 is an explanatory diagram of a conventional partial discharge sound measuring method, and FIG. 5 is a front view illustrating the usage state of the conventional device. 2--11---Partial discharge sound detection sensor, 2 a
-----------Case, 2 b---11---Acoustic sensor, c---111---Detection surface, -11111111 Cushion material, -11 111111 soft soundproofing rubber coating, -11111111 soundproofing wall, 11111111 signal processing circuit. Figure 3: Bottle Rubel (Hon)
Claims (1)
電音を検出する部分放電音検出用センサと、この部分放
電音検出用センサの検出信号を処理する信号処理回路と
から成り、前記部分放電音検出用センサには、前記対象
物と対向する検出面を取り囲む周辺部に、軟質防音ゴム
被覆により包囲されたクッション材からなる遮音壁を設
けたことを特徴とする部分放電検出装置。It consists of a partial discharge sound detection sensor that faces the object and detects the partial discharge sound propagating inside the object, and a signal processing circuit that processes the detection signal of this partial discharge sound detection sensor, and the part A partial discharge detection device characterized in that the discharge sound detection sensor is provided with a sound insulating wall made of a cushioning material surrounded by a soft sound insulating rubber coating in a peripheral portion surrounding the detection surface facing the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1048191A JP2811003B2 (en) | 1989-02-28 | 1989-02-28 | Partial discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1048191A JP2811003B2 (en) | 1989-02-28 | 1989-02-28 | Partial discharge detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02227659A true JPH02227659A (en) | 1990-09-10 |
| JP2811003B2 JP2811003B2 (en) | 1998-10-15 |
Family
ID=12796496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1048191A Expired - Lifetime JP2811003B2 (en) | 1989-02-28 | 1989-02-28 | Partial discharge detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2811003B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008038781A1 (en) * | 2006-09-29 | 2008-04-03 | Tokyo Electron Limited | Probe card and inspection device of minute structure |
-
1989
- 1989-02-28 JP JP1048191A patent/JP2811003B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008038781A1 (en) * | 2006-09-29 | 2008-04-03 | Tokyo Electron Limited | Probe card and inspection device of minute structure |
| JP2008089350A (en) * | 2006-09-29 | 2008-04-17 | Tokyo Electron Ltd | Probe card and inspection device of microstructure |
| KR101013594B1 (en) * | 2006-09-29 | 2011-02-14 | 도쿄엘렉트론가부시키가이샤 | Probe card and microstructure inspecting apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2811003B2 (en) | 1998-10-15 |
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