Laser gyro life prediction
US5719675A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1992 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Jun 16, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1071
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser gyro lifetime prediction method incorporates a memory model that stores a worst case performance parameter for a readout intensity, a laser intensity and a derived quantity known as volts per mode for a laser gyro. A microprocessor based life prediction method utilizes a predetermined failure criteria to judge a estimate of laser gyro life based on historic performance of laser gyro operating parameters. The prediction is based on a linear quadratic or higher order fit of lifetime data for critical temperatures. The performance data is stored in a memory model for each critical temperature and parameter. The laser gyro reports eminent failures to the inertial navigation system or a host controller. Routine scheduled maintenance of the laser gyro is enhanced by knowing its lifetime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.