JPH03128851U

JPH03128851U -

Info

Publication number: JPH03128851U
Application number: JP3838990U
Authority: JP
Priority date: 1990-04-10
Filing date: 1990-04-10
Publication date: 1991-12-25
Anticipated expiration: 2005-04-10
Also published as: JP2503139Y2

Description

[Brief explanation of drawings]

第１図は本考案レーザー超音波斜角探傷装置の
一実施例における装置全体の系統図、第２図はセ
ンサーヘツド使用状態の説明図、第３図は斜角送
信ヘツドの説明図、第４図は第３図の−に沿
つた断面図、第５図は干渉計部の説明図、第６図
は斜角超音波の受信原理の説明図、第７図、第８
図はそれぞれ斜角受信ヘツドの説明図である。第
９図は従来の斜角探傷装置の模式図、第１０図は
その斜角超音波発生原理の説明図である。１０……送信装置、１１……パルスレーザー発
振器、１２……パルスレーザー分岐部、１３……
送信遅延部、２０……受信装置、２１……連続波
レーザー２周波直交光源、２２……連続波レーザ
ー分岐部、２３……干渉計部、２３ａ……干渉計
、２３ｂ……受光器、２４……ＰＬＬ位相検波器
、２５……受信遅延部、２６……受信信号加算器
、２７……オシロスコープ、２８……偏波面保存
フアイバー、２９ａ，２９ｂ……高速切換スイツ
チ、３０……センサーヘツド、３１……斜角送信
ヘツド、３１ａ，３１ｂ，３１ｃ……レンズ、３
２……斜角受信ヘツド、３２ａ……分布屈折率レ
ンズアレイ、４１……送信用光フアイバー、４２
……受信用光フアイバー、４３……パルスレーザ
ー、４４……照射パターン、５４……被検体、５
４′……被検体表面、５５……斜角超音波、５５
′……超音波液面、５６……欠陥。 Fig. 1 is a system diagram of the entire device in one embodiment of the laser ultrasonic angle flaw detection device of the present invention, Fig. 2 is an explanatory diagram of the sensor head in use, Fig. 3 is an explanatory diagram of the oblique angle transmitting head, and Fig. 4 is an explanatory diagram of the oblique angle transmitting head. The figure is a sectional view taken along - in Fig. 3, Fig. 5 is an explanatory diagram of the interferometer section, Fig. 6 is an explanatory diagram of the reception principle of oblique ultrasonic waves, Figs.
Each figure is an explanatory diagram of an oblique receiving head. FIG. 9 is a schematic diagram of a conventional oblique angle flaw detector, and FIG. 10 is an explanatory diagram of the principle of generating oblique ultrasonic waves. 10... Transmitter, 11... Pulse laser oscillator, 12... Pulse laser branch, 13...
Transmission delay unit, 20... Receiving device, 21... Continuous wave laser two-frequency orthogonal light source, 22... Continuous wave laser branching unit, 23... Interferometer unit, 23a... Interferometer, 23b... Light receiver, 24 ... PLL phase detector, 25 ... Reception delay section, 26 ... Reception signal adder, 27 ... Oscilloscope, 28 ... Polarization preserving fiber, 29a, 29b ... High speed changeover switch, 30 ... Sensor head 31... Oblique transmission head, 31a, 31b, 31c... Lens, 3
2... Oblique receiving head, 32a... Gradient refractive index lens array, 41... Optical fiber for transmission, 42
... Optical fiber for reception, 43 ... Pulse laser, 44 ... Irradiation pattern, 54 ... Subject, 5
4'...Object surface, 55...Oblique ultrasound, 55
'...Ultrasonic liquid level, 56...Defect.

Claims

[Claims for Utility Model Registration] A transmitting device consisting of a pulsed laser oscillator, a pulsed laser branching section, and a transmission delay section, a continuous wave laser two-frequency orthogonal light source, a continuous wave laser branching section, an interferometer section including multiple interferometers, and a PLL. A heterodyne receiving device includes a phase detector, a receiving delay section, a received signal adder, and a display, and an oblique transmitting head of the transmitting device and an oblique receiving head of the receiving device are fixed at an appropriate angle. 1. A laser ultrasonic angle flaw detection device comprising a sensor head, and a plurality of optical fibers connected between the sensor head, a transmitting device, and a receiving device, respectively.