JPH0174552U

JPH0174552U -

Info

Publication number: JPH0174552U
Application number: JP1987169198U
Authority: JP
Priority date: 1987-11-05
Filing date: 1987-11-05
Publication date: 1989-05-19

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す図、第２図
はこの考案による超音波探傷装置の送信信号、ス
キヤンゲート、受信エコー及び液晶表示を示す図
、第３図は従来の超音波探傷装置を示す図、第４
図、第５図は従来装置の送信信号、スキヤンゲー
ト、受信エコー及び液晶表示を示す図であり、図
において１は試験体、２は溶接部、３は探触子、
４は欠陥、５は接触媒質、６は超音波、７はケー
ブル、８は送受信回路、９は基準クロツク発生回
路、１０はエコー高さ測定回路、１１はスキヤン
ゲート発生回路、１２は記憶回路、１３は比較回
路、１４はスキヤンゲートアドレス信号、１５は
シリアルデータ変換回路、１６は液晶表示器、１
７は今回エコー高さデータ、１８はビジー信号、
１９は前回エコー高さデータ、２０は書き込みパ
ルス、２１はラツチパルス、２２はエコー高さ表
示データ、２３は受信エコー、４０は送信パルス
、４１は送信信号、４２はビーム路程を示す目盛
、４３ａ，４３ｂ，４３ｃ、４３ｓ，４３ｔ，４
３ｕ及び４３ｚはスキヤンゲート、４４ａ，４４
ｂ，４４ｃは液晶表示された送信エコー、４４ｓ
は液晶表示された欠陥エコー、４５は欠陥エコー
である。なお、各図中同一符号は同一又は相当部
分を示す。 Fig. 1 is a diagram showing an embodiment of this invention, Fig. 2 is a diagram showing a transmission signal, scan gate, received echo, and liquid crystal display of the ultrasonic flaw detection device according to this invention, and Fig. 3 is a diagram showing a conventional ultrasonic flaw detection device. Diagram showing the device, No. 4
Figure 5 shows the transmission signal, scan gate, received echo, and liquid crystal display of the conventional device. In the figure, 1 is the test object, 2 is the welded part, 3 is the probe,
4 is a defect, 5 is a couplant, 6 is an ultrasonic wave, 7 is a cable, 8 is a transmission/reception circuit, 9 is a reference clock generation circuit, 10 is an echo height measurement circuit, 11 is a scan gate generation circuit, 12 is a memory circuit, 13 is a comparison circuit, 14 is a scan gate address signal, 15 is a serial data conversion circuit, 16 is a liquid crystal display, 1
7 is the current echo height data, 18 is the busy signal,
19 is previous echo height data, 20 is a write pulse, 21 is a latch pulse, 22 is echo height display data, 23 is a received echo, 40 is a transmitted pulse, 41 is a transmitted signal, 42 is a scale indicating the beam path, 43a, 43b, 43c, 43s, 43t, 4
3u and 43z are scan gates, 44a, 44
b, 44c are transmission echoes displayed on LCD, 44s
45 is a defect echo displayed on the liquid crystal display. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

In a device that repeatedly transmits ultrasonic pulses to a welded part of a steel pipe as a test object and receives the ultrasonic pulses or reflected ultrasonic pulses, there is a reference clock generation circuit that generates a synchronization signal, and a synchronization generated from the above circuit. A transmitting circuit that transmits signals in synchronization with the signal, an angle probe that converts this transmitted signal into ultrasonic pulses and transmits them from the surface of the test specimen via the couplant, and ultrasonic pulses that are reflected from inside the test specimen. A receiving circuit that converts the ultrasonic pulse into an electrical signal and receives it; and a scan gate generating circuit that generates a scan gate that sequentially moves on the ultrasonic beam path in synchronization with the synchronization signal from the reference clock generating circuit. an echo height measuring circuit for measuring the height of the received echo for the scan gate; a memory circuit for storing the echo height and the scan gate position; and a memory circuit for storing the echo height and the scan gate position. The apparatus is characterized by comprising a comparison circuit for comparing the echo heights obtained and a liquid crystal display for displaying the echo height on the A-scope, and controlling the display of the echo height on the liquid crystal display according to the comparison result of the comparison circuit. Ultrasonic flaw detection equipment.