High frequency type sensing device
US6107924A · kind A · utility
21Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensing device in which a high frequency signal is transmitted from an oscillator to a sensor through a transmission path, a reflection signal generated according to a variation of an impedance of the sensor sensing the presence or absence of an article is detected by a reflected wave sensor, and the presence or absence of the article is detected by the presence or absence of the reflection signal and a level of the signal, whereby the presence or absence of an article other than metal and the kind of the article can be detected regardless of whether a container holding the article is transparent or opaque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.