Non-contact distance measurement system
US4160204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 1974 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Nov 11, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This distance measurement system employs the principle of electromagnetic induction to sense distances between an inductive transducer and an object. The inductive transducer forms a part of a signal phase network, and a means for comparing the signal of the inductive transducer to a reference signal provides linear output of the dimension between the transducer and an object. A circuit element such as a capacitor is connected in parallel with the inductive transducer to enhance the sensitivity and resolution of the measurement, to significantly reduce or eliminate error due to temperature, and to provide a high degree of output linearity relative to the distance measured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.