JPS57175951A - Wave peak value measuring device for acoustic emission - Google Patents
Wave peak value measuring device for acoustic emissionInfo
- Publication number
- JPS57175951A JPS57175951A JP56061350A JP6135081A JPS57175951A JP S57175951 A JPS57175951 A JP S57175951A JP 56061350 A JP56061350 A JP 56061350A JP 6135081 A JP6135081 A JP 6135081A JP S57175951 A JPS57175951 A JP S57175951A
- Authority
- JP
- Japan
- Prior art keywords
- peak value
- acoustic emission
- measuring device
- wave peak
- value measuring
- 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.)
- Pending
Links
Classifications
-
- 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
- G01N29/14—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 using acoustic emission techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE:To make it possible to measure a wave peak value for an acoustic emission wave even if it is large enough to saturate the amplifier by calculating the peak value from a pulse measurement value that was obtained by using counters of more than two systems. CONSTITUTION:AE signal is detected by an AE sensor 2 that is installed on an object to be tested, and this AE signal is input through an amplifier to a low level comparator 10a and a high level comparator 10b. The outputs of the comparators 10a and 10b are measured for pulse by means of a low level up-down counter and high level up-down counter 11a and 11b, and their counting outputs n1and n2 are input to a peak value calculator 12. Then a peak value Vp is calculated at the calculator 12 from lnVp=(n1ln V2-n2lnV1)/(n1-n2), and it is displayed on a monitor 14 through an interface 13. With this arrangement peak values can be measured even for successive waves without influence of electric noises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56061350A JPS57175951A (en) | 1981-04-24 | 1981-04-24 | Wave peak value measuring device for acoustic emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56061350A JPS57175951A (en) | 1981-04-24 | 1981-04-24 | Wave peak value measuring device for acoustic emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57175951A true JPS57175951A (en) | 1982-10-29 |
Family
ID=13168596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56061350A Pending JPS57175951A (en) | 1981-04-24 | 1981-04-24 | Wave peak value measuring device for acoustic emission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57175951A (en) |
-
1981
- 1981-04-24 JP JP56061350A patent/JPS57175951A/en active Pending
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