JPS5832359U

JPS5832359U - Signal transmission device for rotating probe type flaw detector

Info

Publication number: JPS5832359U
Application number: JP12327181U
Authority: JP
Inventors: 関口　宏治; 広光渡辺
Original assignee: 株式会社トキメック
Priority date: 1981-08-20
Filing date: 1981-08-20
Publication date: 1983-03-02
Also published as: JPS6333169Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はスリップリング・ブラシを用いた従来の探触子
回転型探傷機の構造概要図、第２図は前図のブラシ部の
構造図、第３図は第１図のスリップリング・ブラシ部を
電磁結合に置換した信号伝達装置の構造概要図、第４図
は第３図の電磁結合の回路構成を示す図、第５図は静電
容量結合の回路図、第６図は第５図の回路接続したとき
の超音波伝送波形の接続静電容量に対する減衰値の測定
データ、第７図は従来の静電容量結合の円板状の円環電
極、第８図は従来の静電容量結合力式の例を示す構成図
、第９図は前図における回転円環電極と固定部側電極の
構成図、第１０図および第１１図はエアフィンを有する
回転円環電極の構成図、第１２図はエアフィンを有する
回転円環電極と固定部側電極との対向図、第１３図は本
考案の一実施例を示す構成図、第１４図および第１５図
は本考案による回転円環電極と固定部電極との対向図で
ある。１０・・・探触子、２８．２９・・・同軸ケーブル、３
１・・・回転円環電極、３２・・・固定部側電極、３３
ａ、３３ｂ、３３Ｃ，３３ｄ−・・板バネ、３４ａ。３４ｂ、３４Ｃ，３４ｄ−・・空気孔ニップル、３６ａ
。３６ｂ、３６Ｃ，３６ｄ・・・エアフィン、３７・・・
外筐、３８・・・固定部側電極、３９・・・プラスチッ
クフィルム、４０・・・中央孔。茶５図′ μ ・ル　−。Figure 1 is a structural diagram of a conventional rotary probe flaw detector using a slip ring brush, Figure 2 is a structural diagram of the brush part shown in the previous figure, and Figure 3 is the slip ring brush shown in Figure 1. Fig. 4 is a diagram showing the circuit configuration of the electromagnetic coupling in Fig. 3, Fig. 5 is a circuit diagram of capacitive coupling, and Fig. Measured data of the attenuation value of the ultrasonic transmission waveform with respect to the connection capacitance when the circuit shown in the figure is connected. A configuration diagram showing an example of the capacitive coupling force type, FIG. 9 is a configuration diagram of the rotating annular electrode and fixed part side electrode in the previous figure, FIGS. 10 and 11 are configuration diagrams of the rotating annular electrode with air fins, Fig. 12 is a facing view of a rotating annular electrode having air fins and a fixed part side electrode, Fig. 13 is a configuration diagram showing an embodiment of the present invention, and Figs. 14 and 15 are a rotating annular electrode according to the present invention. FIG. 3 is a facing view of an electrode and a fixed part electrode. 10... Probe, 28.29... Coaxial cable, 3
1...Rotating annular electrode, 32...Fixed part side electrode, 33
a, 33b, 33C, 33d--plate spring, 34a. 34b, 34C, 34d--Air hole nipple, 36a
. 36b, 36C, 36d... air fin, 37...
Outer casing, 38... Fixed part side electrode, 39... Plastic film, 40... Center hole. Tea Figure 5'μ・ru−.

Claims

[Scope of utility model registration request]

The signal transmission between the probe attached to the rotating rotor side of the rotating probe type flaw detector and the fixed part side is carried out by approaching a disc-shaped rotating annular electrode provided on the rotating rotor side and facing the rotating part. In the case where a ring electrode is arranged on the side and the coupling is performed by capacitance, the flexible plastic film has a hole that is concentric with the inner hole of the rotating ring electrode and is equal to or slightly larger than the inner hole, and is concentric with the hole. Capacitive coupling between a fixed part side annular electrode formed by vapor-depositing a conductive foil in an annular shape and the rotating annular electrode that faces the rotating annular electrode through an air fluid layer that is generated as the rotating annular electrode rotates at high speed. A signal transmission device for a rotating probe type flaw detector.