JPS57179746A - Monitoring device for fatigue degree of structure - Google Patents
Monitoring device for fatigue degree of structureInfo
- Publication number
- JPS57179746A JPS57179746A JP56065971A JP6597181A JPS57179746A JP S57179746 A JPS57179746 A JP S57179746A JP 56065971 A JP56065971 A JP 56065971A JP 6597181 A JP6597181 A JP 6597181A JP S57179746 A JPS57179746 A JP S57179746A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- pipe
- ultrasonic wave
- fatigue
- supplied
- 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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4454—Signal recognition, e.g. specific values or portions, signal events, signatures
-
- 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
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
-
- 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
-
- 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
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Landscapes
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE:To detect a fault of a structure before cracks, etc. are caused in a structure, by carrying out monitor for the degree of fatigue of the structure such as a piping in a plant by making use of the transmission properties of ultrasonic wave. CONSTITUTION:The clock is supplied to a wave transmission driving circuit 2 from a clock signal generator 1, and the circuit 2 applies the high voltage pulse signal to a wave transmitter 3. The ultrasonic wave given from the transmitter 3 is transmitted to an end of a bent pipe 4. This ultrasonic wave propagates at the inside of the pipe 4 and reaches a wave receiver 5 set at the other end of the pipe 4 to be converted into an electric signal. This electric signal is supplied to a time measuring device 7 and a peak detector 8 via an amplifier 6. Then the propagation time of the ultrasonic wave which is measured by the device 7 plus the peak value of the wave receiving signal detected by the detector 8 are supplied to a fatigue deciding device 9 to decide the fatigue degree of the pipe 4. In such a way, the effect of ambient noises, etc. is reduced to ensure monitor with high accuracy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56065971A JPS57179746A (en) | 1981-04-30 | 1981-04-30 | Monitoring device for fatigue degree of structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56065971A JPS57179746A (en) | 1981-04-30 | 1981-04-30 | Monitoring device for fatigue degree of structure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57179746A true JPS57179746A (en) | 1982-11-05 |
Family
ID=13302388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56065971A Pending JPS57179746A (en) | 1981-04-30 | 1981-04-30 | Monitoring device for fatigue degree of structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57179746A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63186122A (en) * | 1987-01-28 | 1988-08-01 | Power Reactor & Nuclear Fuel Dev Corp | Abnormality diagnosing system for structure |
JPH06345112A (en) * | 1993-06-11 | 1994-12-20 | Kitapura:Kk | Liquid container made of synthetic resin |
CN103792291A (en) * | 2012-10-31 | 2014-05-14 | 波音公司 | Apparatus and method for measuring in-plane elastic constants for laminate plate |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5216284A (en) * | 1975-07-28 | 1977-02-07 | Mitsubishi Heavy Ind Ltd | Detecting method of fatigue |
JPS53120585A (en) * | 1977-03-30 | 1978-10-21 | Toshiba Corp | Remaining life measuring method of metal materials |
-
1981
- 1981-04-30 JP JP56065971A patent/JPS57179746A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5216284A (en) * | 1975-07-28 | 1977-02-07 | Mitsubishi Heavy Ind Ltd | Detecting method of fatigue |
JPS53120585A (en) * | 1977-03-30 | 1978-10-21 | Toshiba Corp | Remaining life measuring method of metal materials |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63186122A (en) * | 1987-01-28 | 1988-08-01 | Power Reactor & Nuclear Fuel Dev Corp | Abnormality diagnosing system for structure |
JPH0511895B2 (en) * | 1987-01-28 | 1993-02-16 | Doryokuro Kakunenryo Kaihatsu Jigyodan | |
JPH06345112A (en) * | 1993-06-11 | 1994-12-20 | Kitapura:Kk | Liquid container made of synthetic resin |
CN103792291A (en) * | 2012-10-31 | 2014-05-14 | 波音公司 | Apparatus and method for measuring in-plane elastic constants for laminate plate |
JP2014092543A (en) * | 2012-10-31 | 2014-05-19 | Boeing Co | Apparatus and method for measuring in-plane elastic constants for laminate |
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