Display system for steady state waves
US4345247A · kind A · utility
Inventors
Key dates
| Filing date | Sep 29, 1980 |
| Grant date | Aug 17, 1982 |
| Priority date | — |
| Expiry date | Sep 29, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for directly displaying steady state waves, such as sound waves, ultrasonic waves, electromagnetic waves, and the like, by instantaneously sampling the amplitude of the waves in a known phase relationship with some other portion of the wave train. The system includes a source of the waves, such as a speaker, and a transducer, such as a microphone, an electrical signal source being coupled to the wave signal source, and the transducer being connected to a sample and hold circuit whose output is applied to a light emitting diode (LED), or other display unit. The transducer is moved towards and away from the wave signal source in the path of the waves eminating from the wave signal source. In the following description the system will be described in conjunction with wound waves traveling in air, eminating from a speaker and transduced by a microphone. It will be evident as the description proceeds that the system may be used for displaying waves other than sound waves, such as ultrasonic waves; and/or for displaying waves traveling in a medium other than air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.