Lithium niobate explosion monitor
US4893049A · kind A · utility
10Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1986 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | May 29, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Monitoring explosive devices is accomplished with a substantially z-cut lithium niobate crystal in abutment with the explosive device. Upon impact by a shock wave from detonation of the explosive device, the crystal emits a current pulse prior to destruction of the crystal. The current pulse is detected by a current viewing transformer and recorded as a function of time in nanoseconds. In order to self-check the crystal, the crystal has a chromium film resistor deposited thereon which may be heated by a current pulse prior to detonation. This generates a charge which is detected by a charge amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.