EMATS for spot weld examination
US6250163A · kind A · utility
18Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Mar 9, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/2672
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An EMAT apparatus which non-destructively tests spot welds between two sheets of metal. The apparatus includes a first EMAT coil on one sheet that acts as a transmitter for generating and transmitting an acoustic wave signal toward the spot weld, and a second EMAT coil on the other sheet for receiving the acoustic wave signal and converting the received acoustic wave signal to an electronic signal having a waveform. Electronics and a PC are used to measure at least one parameter of the waveform which is indicative of a characteristic of the spot weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.