JPH0117539B2 - - Google Patents
Info
- Publication number
- JPH0117539B2 JPH0117539B2 JP56129638A JP12963881A JPH0117539B2 JP H0117539 B2 JPH0117539 B2 JP H0117539B2 JP 56129638 A JP56129638 A JP 56129638A JP 12963881 A JP12963881 A JP 12963881A JP H0117539 B2 JPH0117539 B2 JP H0117539B2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic ultrasonic
- abnormality
- ultrasonic generator
- transmitting coil
- coaxial cable
- 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
Links
- 230000005856 abnormality Effects 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 239000000523 sample Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 239000012212 insulator Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
Description
【発明の詳細な説明】
この発明は、電磁超音波発生装置の軽度の異常
を検出し、この装置を保護するとともに、データ
の信頼性を高める電磁超音波発生装置の異常検出
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality detection device for an electromagnetic ultrasonic generator that detects minor abnormalities in the electromagnetic ultrasonic generator, protects the device, and improves data reliability.
従来、この種の装置に関し、異常検出はなされ
ていなかつた。したがつて、高電圧電源を用いて
いる電磁超音波発生装置で、この装置を構成して
いる絶縁物にそのまま放電すれば完全に破壊する
ような軽度の絶縁破壊が発生しても、その検出手
段がなく上記装置を絶縁破壊などによる事故から
保護ができないため、装置の信頼性および安全性
の向上を計ることができない。しかも計測データ
の信頼性も失なわれるなどの欠点があつた。 Conventionally, no abnormality has been detected in this type of device. Therefore, even if a slight dielectric breakdown occurs in an electromagnetic ultrasonic generator that uses a high-voltage power source that would completely destroy the insulators that make up the device, it is difficult to detect it. Since there is no means to protect the device from accidents such as dielectric breakdown, it is impossible to improve the reliability and safety of the device. Moreover, there were drawbacks such as loss of reliability of measurement data.
この発明は、上記従来の欠点を除去するために
なされたもので、超音波送信電流を検出し、その
電流波形の周波数成分とその大きさを診断するこ
とにより、異常を検出し、電磁超音波発生装置を
保護する機能を備えた電磁超音波発生装置の異常
検出装置を提供することを目的としている。 This invention was made in order to eliminate the above-mentioned conventional drawbacks, and by detecting the ultrasonic transmission current and diagnosing the frequency components and magnitudes of the current waveform, it detects abnormalities and transmits electromagnetic ultrasonic waves. It is an object of the present invention to provide an abnormality detection device for an electromagnetic ultrasonic generator that has a function of protecting the generator.
以下、この発明の電磁超音波発生装置の異常検
出装置の実施例について図面に基づき説明する。
第１図はその一実施例の構成をすブロツク図であ
る。この第１図において、１は高圧直流電源であ
り、その両出力端間には充電用の抵抗２と充放電
用のコンデンサ３が直列に接続されており、高圧
直流電源１の負側の出力端はアースされている。 Embodiments of the abnormality detection device for an electromagnetic ultrasonic generator according to the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing the configuration of one embodiment. In FIG. 1, 1 is a high-voltage DC power supply, and a charging resistor 2 and a charging/discharging capacitor 3 are connected in series between both output terminals of the high-voltage DC power supply 1. The end is grounded.
この抵抗２とコンデンサ３との接続点P1は高
電圧用スイツチ４、制動用抵抗５、送信用の同軸
ケーブル６の中心導体および電磁超音波発生用の
送信コイル７を介して高圧直流電源１の負側の出
力端に接続されている。かくして、高圧直流電源
１、抵抗２、コンデンサ３、高電圧用スイツチ
４、制動用抵抗５、同軸ケーブル６、送信コイル
７、とにより、電磁超音波発生装置８が構成され
ている。 The connection point P 1 between the resistor 2 and the capacitor 3 is connected to the high voltage DC power supply 1 via the high voltage switch 4, the braking resistor 5, the center conductor of the coaxial cable 6 for transmission, and the transmitting coil 7 for generating electromagnetic ultrasonic waves. is connected to the negative output terminal of Thus, the electromagnetic ultrasonic generator 8 is constituted by the high voltage DC power supply 1, the resistor 2, the capacitor 3, the high voltage switch 4, the braking resistor 5, the coaxial cable 6, and the transmitting coil 7.
一方、９は送信電流検出用の電流検出器であ
り、以下、カレントプローブと言う。このカレン
トプローブ９は同軸ケーブル６の外部導体と高圧
直流電源１の負側の出力端に設けられ、その出力
はハイパスフイルターからなるバンドパスフイル
タ１０を介して検波器１１に送られるようになつ
ている。この検波器１１の出力はアナログのコン
パレータ１２に送られるようになつている。この
コンパレータ１２の出力は異常検出時の制御回路
１３に送出するようになつている。 On the other hand, 9 is a current detector for detecting a transmission current, and is hereinafter referred to as a current probe. This current probe 9 is provided at the outer conductor of the coaxial cable 6 and the negative output end of the high-voltage DC power supply 1, and its output is sent to a detector 11 via a bandpass filter 10 consisting of a high-pass filter. There is. The output of this detector 11 is sent to an analog comparator 12. The output of this comparator 12 is sent to a control circuit 13 when an abnormality is detected.
かくして、バンドパスフイルタ１０、検波器１
１、コンパレータ１２、制御回路１３とにより判
定制御部１４が構成されている。この判定制御部
１４は異常の有無を判定し、電磁超音波発生装置
を制御するものであり、制御回路１３の出力によ
り高圧直流電源１を制御するようになつている。
そしてこの判定制御部１４とカレントプローブ９
とにより異常検出装置２０が構成されている。 Thus, the bandpass filter 10, the detector 1
1, a comparator 12, and a control circuit 13 constitute a determination control section 14. The determination control section 14 determines the presence or absence of an abnormality and controls the electromagnetic ultrasonic generator, and controls the high voltage DC power supply 1 based on the output of the control circuit 13.
This determination control section 14 and current probe 9
The abnormality detection device 20 is configured by the above.
第２図は第１図における同軸ケーブル６の一部
を拡大して、異常発生事例を示したものである。
この第２図において、１５は同軸ケーブル６の外
側導体、１６は同軸ケーブル６の中心導体、１７
は同軸ケーブル６および送信コイル７の絶縁物で
あり、図中の記号Ａ，Ｂは同軸ケーブル６および
送信コイル７の絶縁物１７の絶縁破壊が発生して
いることを示しているものである。 FIG. 2 is an enlarged view of a part of the coaxial cable 6 in FIG. 1, showing an example of an abnormality occurring.
In this FIG. 2, 15 is the outer conductor of the coaxial cable 6, 16 is the center conductor of the coaxial cable 6, and 17 is the outer conductor of the coaxial cable 6.
are the insulators of the coaxial cable 6 and the transmitting coil 7, and symbols A and B in the figure indicate that dielectric breakdown has occurred in the insulator 17 of the coaxial cable 6 and the transmitting coil 7.
一方、第３図において、１８は電磁超音波発生
装置８が正常に動作しているときの検出信号、１
９は超音波電磁発生装置８に異常（絶縁物破壊）
が発生したときの検出信号である。 On the other hand, in FIG. 3, 18 is a detection signal when the electromagnetic ultrasonic generator 8 is operating normally;
9 is an abnormality in the ultrasonic electromagnetic generator 8 (insulator breakdown)
This is the detection signal when this occurs.
次に、以上のように構成されたこの発明の電磁
超音波発生装置の異常検出装置の動作について説
明する。電磁超音波を発生するために、まず充電
用の抵抗２を通じて高圧直流電源１から充放電用
のコンデンサ３に電荷が充電される。しかる後、
スイツチ４を閉じると、コンデンサ３に充電され
た電荷が制動抵抗５、同軸ケーブル６，送信コイ
ル７を通じて放電される。 Next, the operation of the abnormality detection device for an electromagnetic ultrasonic generator according to the present invention configured as described above will be explained. In order to generate electromagnetic ultrasonic waves, first, a charge and discharge capacitor 3 is charged from a high-voltage DC power supply 1 through a charging resistor 2. After that,
When the switch 4 is closed, the charge stored in the capacitor 3 is discharged through the braking resistor 5, the coaxial cable 6, and the transmitting coil 7.
このとき電磁超音波発生装置８に絶縁破壊など
の異常がなければ、第３図ａに示すような送信電
流がカレントプローブ９で検出される。上記検出
信号ａをバンドパスフイルタ１０に入力すると第
３図ｂに示す信号が出力され、この信号が検波器
１１に入力すると、検波器１１から第３図ｃに示
す信号が出力され、コンパレータ１２に入力され
る。 At this time, if there is no abnormality such as dielectric breakdown in the electromagnetic ultrasonic generator 8, a transmission current as shown in FIG. 3a is detected by the current probe 9. When the detection signal a is inputted to the bandpass filter 10, the signal shown in FIG. 3b is outputted, and when this signal is inputted to the wave detector 11, the signal shown in FIG. is input.
ところが、コンパレータ１２のしきい値Ｌより
も入力信号が小さいので、コンパレータ１２から
は第３図ｄに示すように何も出力されないので、
制御回路１３は動作しない。 However, since the input signal is smaller than the threshold value L of the comparator 12, nothing is output from the comparator 12 as shown in FIG. 3d.
Control circuit 13 does not operate.
他方電磁超音波発生装置８において、同軸ケー
ブル６または送信コイル７の絶縁物１７に絶縁劣
化が生ずると、第３図ｅに示すように、｜i0｜よ
りも大きな振幅の電流が流れる期間にアースと絶
縁劣化箇所間に第２図のＡ，Ｂで示す絶縁破壊が
発生し、このため第３図ａに示される正常時の電
流波形に比べて、｜i0｜よりも大きな振幅の期間
に高調波が重畳する電流波形が検出される。 On the other hand, in the electromagnetic ultrasonic generator 8, if insulation deterioration occurs in the coaxial cable 6 or the insulator 17 of the transmitting coil 7, as shown in FIG . Dielectric breakdown shown as A and B in Figure 2 occurs between the ground and the insulation deterioration point, and as a result, compared to the normal current waveform shown in Figure 3 a, the period of amplitude larger than |i 0 | A current waveform in which harmonics are superimposed is detected.
この検出電流は、バンドパスフイルタ１０によ
つて第３図ｆに示すような信号となり、検波器１
１から第３図ｇに示す信号が出力される。しきい
値Ｌをもつコンパレータ１２は第３図ｇの信号の
レベルを比較し、第３図ｈに示す信号が出力す
る。 This detected current becomes a signal as shown in FIG.
The signals shown in FIGS. 1 to 3g are output. A comparator 12 having a threshold value L compares the levels of the signals shown in FIG. 3g and outputs a signal shown in FIG. 3h.
制御回路１３は、この第３図(h)に示すコンパレ
ータ１２の出力信号を検知し、異常発生の警報お
よび表示するとともに、電磁超音波発生装置８を
保護するために、高圧直流電源１をしや断する。 The control circuit 13 detects the output signal of the comparator 12 shown in FIG. I refuse.
なお、上記実施例では、電流検出器にカレント
プローブ９を用いているが電流検出機能を有して
いるものであれば他のものでもよい。また検出位
置は、送信電流の流れる回路内であればどの位置
でもよい。 In the above embodiment, the current probe 9 is used as the current detector, but any other device may be used as long as it has a current detection function. Further, the detection position may be any position within the circuit through which the transmission current flows.
さらに異常発生事例として同軸ケーブル６と送
信コイル７を考えたが、電磁超音波発生装置８内
の異常発生をも検出することができる。 Furthermore, although the coaxial cable 6 and the transmitting coil 7 have been considered as an example of abnormality occurrence, abnormality occurrence within the electromagnetic ultrasonic wave generator 8 can also be detected.
以上のように、この発明の電磁超音波発生装置
の異常検出装置によれば、超音波送信電流の高調
波成分を検出し、その成分を検波し、さらに検波
信号の大きさ又は発生頻度により異常の有無を判
断して電磁超音波発生装置の異常を初期に検出し
て、電磁超音波発生装置を保護するようにしたの
で、電磁超音波発生装置としての信頼性を高める
ことができる。 As described above, the abnormality detection device for an electromagnetic ultrasonic generator of the present invention detects the harmonic component of the ultrasonic transmission current, detects the component, and further detects the abnormality depending on the magnitude or frequency of the detected signal. Since the electromagnetic ultrasonic generator is protected by detecting an abnormality in the electromagnetic ultrasonic generator at an early stage by determining the presence or absence of the electromagnetic ultrasonic generator, the reliability of the electromagnetic ultrasonic generator can be improved.
第１図はこの発明の電磁超音波発生装置の異常
検出装置の一実施例の構成を示すブロツク図、第
２図は同上電磁超音波発生装置の異常検出装置に
おける同軸ケーブルと送信コイルの部分の異常発
生事例を示す一部を拡大して示す図、第３図ａな
いし第３図ｈはそれぞれこの発明の電磁超音波発
生装置の異常検出装置の動作を説明するための信
号波形図である。
１……高圧直流電源、２……抵抗、３……コン
デンサ、４……スイツチ、５……制動抵抗、６…
…同軸ケーブル、７……送信コイル、８……電磁
超音波発生装置、９……カレントプローブ、１０
……バンドパスフイルタ、１１……検波器、１２
……コンパレータ、１３……制御回路、１４……
異常判定制御部、２０……異常判定装置。なお、
図中同一符号は同一、又は相当部分を示す。
Fig. 1 is a block diagram showing the configuration of an embodiment of the abnormality detection device for an electromagnetic ultrasonic generator according to the present invention, and Fig. 2 shows the coaxial cable and transmitting coil portion of the abnormality detection device for the electromagnetic ultrasonic generator. FIGS. 3a to 3h, partially enlarged views showing an abnormality occurrence case, are signal waveform diagrams for explaining the operation of the abnormality detection device of the electromagnetic ultrasonic generator of the present invention. 1... High voltage DC power supply, 2... Resistor, 3... Capacitor, 4... Switch, 5... Braking resistor, 6...
... Coaxial cable, 7 ... Transmission coil, 8 ... Electromagnetic ultrasonic generator, 9 ... Current probe, 10
... Bandpass filter, 11 ... Detector, 12
... Comparator, 13 ... Control circuit, 14 ...
Abnormality determination control section, 20... Abnormality determination device. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
に送り電磁超音波を発生する電磁超音波発生装
置、上記送信コイルに流れる電流の高調波成分を
検出する第１の手段、該第１の手段により検出さ
れた上記高調波成分を検波する検波手段、該検波
手段による検波信号の大きさ又は発生頻度により
異常判定する異常判定手段及び該異常判定手段か
ら異常判定信号を受けて上記高圧直流電源をしや
断する第２の手段を備えてなる電磁超音波発生装
置の異常検出装置。1. An electromagnetic ultrasonic generator that sends energy from a high-voltage DC power source to a transmitting coil and generates electromagnetic ultrasonic waves; a first means for detecting harmonic components of the current flowing through the transmitting coil; a detection means for detecting the harmonic component, an abnormality determination means for determining an abnormality based on the magnitude or frequency of occurrence of a detected signal by the detection means, and an abnormality determination signal received from the abnormality determination means to quickly shut off the high voltage DC power supply. An abnormality detection device for an electromagnetic ultrasonic generator, comprising a second means for detecting an abnormality in an electromagnetic ultrasonic generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129638A JPS5832162A (en) | 1981-08-19 | 1981-08-19 | Detector for abnormality of electromagnetic ultrasonic wave generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129638A JPS5832162A (en) | 1981-08-19 | 1981-08-19 | Detector for abnormality of electromagnetic ultrasonic wave generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5832162A JPS5832162A (en) | 1983-02-25 |
| JPH0117539B2 true JPH0117539B2 (en) | 1989-03-30 |
Family
ID=15014447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56129638A Granted JPS5832162A (en) | 1981-08-19 | 1981-08-19 | Detector for abnormality of electromagnetic ultrasonic wave generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5832162A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04351667A (en) * | 1991-05-29 | 1992-12-07 | Shin Etsu Chem Co Ltd | Curable resin composition and protective film for electronic component |
-
1981
- 1981-08-19 JP JP56129638A patent/JPS5832162A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5832162A (en) | 1983-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU4358299A (en) | Method and device for monitoring an electrode line of a bipolar high voltage direct current (hvdc) transmission system | |
| JP4092654B2 (en) | Ground fault detection device | |
| JPH0117539B2 (en) | ||
| KR0169969B1 (en) | Power apparatus, power transmission/distribution unit, and tripping method therefor | |
| US3976920A (en) | Filtering arrangement for relay protection devices | |
| KR101956192B1 (en) | Apparatus and method for arc detection of electric power equipment | |
| JP2002062330A (en) | Apparatus and method for evaluating integrity of insulation between coil turns | |
| JPH0627182A (en) | Partial discharge monitoring apparatus | |
| JP2774645B2 (en) | Partial discharge detector | |
| JP3172626B2 (en) | Partial discharge detection method for high voltage equipment | |
| JP3126391B2 (en) | Partial discharge detector | |
| JPH04194762A (en) | Device for monitoring partial discharge of electric apparatus | |
| CN110581556A (en) | Track circuit higher harmonic suppression circuit | |
| JP2608925B2 (en) | Partial discharge detection method for power cables | |
| JPH08320356A (en) | Partial discharge detection device | |
| JP2598404Y2 (en) | Abnormality monitoring device for gas insulated switchgear | |
| JP2670948B2 (en) | Partial discharge monitoring method | |
| KR100196299B1 (en) | Insulator deterioration measuring apparatus of power cable | |
| JPH0524466B2 (en) | ||
| JP2774649B2 (en) | Partial discharge detector | |
| JPH0787653B2 (en) | Abnormality detection device for reduction type switchgear | |
| JPH02285269A (en) | Partial discharge monitor apparatus of gas insulated machinery | |
| JP2511324Y2 (en) | Internal partial discharge detection device for electrical equipment | |
| JP2950425B2 (en) | Partial discharge monitoring device for electrical equipment | |
| JPS6037002Y2 (en) | High voltage generator |