GB1532675A - Method and apparatus for monitoring the function in ultrasonics testing of tubes and bars - Google Patents
Method and apparatus for monitoring the function in ultrasonics testing of tubes and barsInfo
- Publication number
- GB1532675A GB1532675A GB4091076A GB4091076A GB1532675A GB 1532675 A GB1532675 A GB 1532675A GB 4091076 A GB4091076 A GB 4091076A GB 4091076 A GB4091076 A GB 4091076A GB 1532675 A GB1532675 A GB 1532675A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- transducer
- signals
- scatter
- receiver
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52004—Means for monitoring or calibrating
-
- 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
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
Abstract
1532675 Ultrasonic flaw detectors KRAUTKRAMER GmbH and MANNESMANNROHREN-WERKE AG 1 Oct 1976 40910/76 Heading G1G The operational function of one or more transmitters, receivers and/or amplifiers used for ultrasonic testing of pipes and bars for material flaws is monitored by amplifying the output signals from the or each receiver which result from reception of scatter sonic signals from the surface of the pipe or bar, and detecting reduction of the amplified stray signals below a predetermined level to signal operational failure. As described with reference to Fig. 7 (not shown), a single transmitting-receiving transducer has two output channels one connected to a flow monitoring channel including an amplifier and the other connected to a scatter signal monitoring channel including a second amplifier, the gain of this latter amplifier being higher than that of the first amplifier. In a modification as described with reference to Fig. 9 (not shown), the output of a single transmitting-receiving transducer is connected to an amplifier whose output is connected to a first flaw monitoring channel and a second scatter signal monitoring channel which includes additional amplifier stages for detecting the scatter signals. In a further modification as described with reference to Fig. 11 (not shown), the output of the single transducer is connected to a logarithmic amplifier whose output is applied to a monitor system on which two different limit values are set, one for flaw signals and the other for scatter signals. In a two-transducer system as described with reference to Fig. 8 (not shown), one transducer acts as a transmitter-receiver and the other as a receiver. The receiver transducer detects flaw signals whereas the transmitter-receiver transducer detects the scatter signals and has its output connected to a scatter signal monitoring channel including an amplifier. As shown in Fig. 10, this arrangement is modified by having both transducers 1a, 1b acting on transmitter-receivers, and in a first cycle causing the transducer 1b to act as a transmitter-receiver and the second transducer 1a to act as a receiver only so that flaw signals from receiver 1a are monitored in the channel comprising amplifier 8 and monitor 10 and scatter signals received from transducer 1b are monitored in the channel comprising amplifier 9 and monitor 11, and in a second cycle causing the transducer 1a to act as a transmitter-receiver so that scatter signals received from transducer 1a are monitored in the channel comprising amplifier 8, amplifier stages 13 and monitor 11. In a modification of this arrangement, Fig. 12 (not shown), the amplifier 8 is replaced by a logarithmic amplifier whose output is applied to a monitor on which two different limit values are set, one for flaw signals and the other for scatter signals. As described with reference to Fig. 13 (not shown), to prevent an operational breakdown signal being provided for spurious reductions of the scatter signals, a counter is connected to the output(s) of the scatter signal monitoring channel(s) and provides a breakdown signal only when a predetermined number of scatter signal reductions have been detected. A multiple transducer embodiment is described with reference to Fig. 14 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4091076A GB1532675A (en) | 1976-10-01 | 1976-10-01 | Method and apparatus for monitoring the function in ultrasonics testing of tubes and bars |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4091076A GB1532675A (en) | 1976-10-01 | 1976-10-01 | Method and apparatus for monitoring the function in ultrasonics testing of tubes and bars |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1532675A true GB1532675A (en) | 1978-11-15 |
Family
ID=10417223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4091076A Expired GB1532675A (en) | 1976-10-01 | 1976-10-01 | Method and apparatus for monitoring the function in ultrasonics testing of tubes and bars |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1532675A (en) |
-
1976
- 1976-10-01 GB GB4091076A patent/GB1532675A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |