Drive for dynamic mechanical system
US4049997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Feb 27, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dynamic mechanical system is driven at its resonant frequency by a drive system which maintains the vibrational amplitude of the system constant. A displacement transducer senses the mechanical displacement of the system and provides a displacement signal which is used to generate a control signal related to the energy necessary to maintain the mechanical system in resonance. The zero crossover points of the displacement signal are shifted in-phase 90.degree. and used to selectively switch the control signal to provide an in-phase drive signal for the system. An offset correction system senses any asymmetry present in the displacement signal and adjusts the drive signal to compensate for such asymmetry so that the mechanical system operates about a zero point of the displacement transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.