JPS5917855U

JPS5917855U - Ultrasonic flaw detector

Info

Publication number: JPS5917855U
Application number: JP11191582U
Authority: JP
Inventors: 大貫　益夫
Original assignee: 三菱電機株式会社
Priority date: 1982-07-23
Filing date: 1982-07-23
Publication date: 1984-02-03

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ａは超音波探傷時の受信信号波形と、周波数測定
の際の時間計測間隔を示す図。第１図すは従来の超音波
探傷器のブロックダイヤグラムとオツシロスコープを用
いて周波数を測定する場合の接続を示す図、第２図はこ
の考案の超音波探傷器を示す図、第３図ａは生の受信波
形と計測用マーカを同時表示させた場合のブラウン管表
示の様子を示す図、第３図すは生の受信波形と計測用マ
ーカを２現象表示の様子を示す図である。図中１は基準パルス発生器、２は送信パルス発生器、３
は超音波探触子、４は受信信号増幅器、５は検波および
平滑回路、６はビデオ信号増幅器、７は水平掃引信号発
生器、８はブラウン管表示器、１１は被検材、１２は時
間計測用マーカ信号発生器、Ｓ工〜Ｓ、は切換スイッチ
である。なお図中同一あるいは相当部部分には同一符号
を示しである。FIG. 1a is a diagram showing the received signal waveform during ultrasonic flaw detection and the time measurement interval during frequency measurement. Figure 1 is a block diagram of a conventional ultrasonic flaw detector and the connections when measuring frequency using an oscilloscope. Figure 2 is a diagram showing the ultrasonic flaw detector of this invention. Figure 3 FIG. 3a is a diagram showing a cathode ray tube display when a raw received waveform and a measurement marker are displayed simultaneously, and FIG. 3 is a diagram showing a dual phenomenon display of a raw received waveform and a measurement marker. In the figure, 1 is a reference pulse generator, 2 is a transmission pulse generator, and 3 is a reference pulse generator.
is an ultrasonic probe, 4 is a receiving signal amplifier, 5 is a detection and smoothing circuit, 6 is a video signal amplifier, 7 is a horizontal sweep signal generator, 8 is a cathode ray tube display, 11 is a test material, and 12 is a time measurement The marker signal generator for use, S-S, is a changeover switch. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

Claims

[Scope of utility model registration request]

A reference pulse generator, a transmission pulse generator that generates transmission pulses based on the output of the reference pulse generator, and a transmission pulse generator that receives the transmission pulses and generates ultrasonic waves into the material to be inspected, which are then reflected from the material to be inspected. an ultrasonic probe that converts ultrasonic waves into electric signals; a reception signal amplifier that receives and amplifies the electric signals converted by the ultrasonic probe; and a detection and smoothing circuit that detects and rectifies the output of the amplifier; a video signal amplifier that amplifies the output of the detection and smoothing circuit; a horizontal sweep signal generator that generates a horizontal sweep signal using the output of the reference pulse generator; In an ultrasonic flaw detector equipped with a cathode ray tube display for input, a marker signal generator for time measurement whose output is input to the reference pulse generator, and a receiving signal amplifier or a detection and smoothing circuit for the video signal amplifier. a first changeover switch for connecting the time measuring marker signal generator to the video amplifier; and a second changeover switch for changing the vertical axis base line position between near the center of the cathode ray tube and the flaw detection position. 3 changeover switch and a fourth changeover switch that switches the swept wave generated from the horizontal sweep signal generator to a measurement range necessary for frequency measurement, and is used for ultrasonic flaw detection by the first to fourth changeover switches. An ultrasonic flaw detector characterized in that the raw waveform of the ultrasonic wave and the time measurement marker are displayed on a cathode ray tube simultaneously or in combination so that the time interval of the waveform can be visually measured.