Apparatus for measuring the length of an electrical line
US4734637A · kind A · utility
15Cited by
2References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Apr 16, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for precisely and quickly measuring the length of a line under test to an electrical discontinuity of the line, the apparatus including an edge generator for providing an edge to one end of the line, a reflection detector for detecting the edge reflection returning from the discontinuity to the one end and triggering the edge generator to provide an edge at a fixed time after detecting the edge reflection so as to cause the edge generator to repeatedly provide the edges at a frequency related to the propagation delay in the length of line, and a frequency measurer connected to measure the frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.