http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104880510-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N29-04 |
| filingDate | 2015-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2017-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2017-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-104880510-B |
| titleOfInvention | Guided wave detecting method and device are twisted and warped using the spiral welded pipe of spiral transduction device |
| abstract | The invention discloses a kind of spiral welded pipe using spiral transduction device to twist and warp guided wave detecting method and device.The guided wave Dispersion of spiral welded pipe is calculated by semi-analysis finite element method, and then the twist and warping guided wave frequency and its velocity of wave of parallel spiral weld seam is calculated；Spiral transduction device is arranged one week along the hand of spiral, twist and warping guided wave is excited by Guided waves instrument control system, ripple is received back to after running into defect reflection along spiral welded pipe Propagation；Defective locations are determined according to defect waves bag, defect distance is calculated.Spiral weld signal persistently appears in the phenomenon of echo when carrying out Guided waves this invention removes traditional endless integral type magnetostrictive transducer, improves the signal to noise ratio of echo so that flaw indication can be extracted easily, improve the reliability of spiral welded pipe Guided waves. |
| priorityDate | 2015-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 13.