Positioning device
US9857496B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Sep 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A locating device includes an AC voltage locating apparatus. The AC voltage locating apparatus has a first receiving apparatus configured to receive a first coupling signal from a locatable object. The AC voltage locating apparatus also has at least a second receiving apparatus configured to receive at least a second coupling signal from the locatable object. The AC voltage locating apparatus also has at least a first amplifier circuit configured to amplify a difference of the first coupling signal relative to a reference signal in at least one operating. The AC voltage locating apparatus also has at least a second amplifier circuit configured to amplify a difference of the first coupling signal and the second coupling signal in at least one operating state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.