Apparatus for measuring the length of an electrical line

Details Apparatus for measuring the length of an electrical line Apparatus for measuring the length of an electrical line

1986-04-16

1988-03-29

Pellinen, A. D.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 58B, 324 585B, G01R 3102, G01R 3111

Patent

active

047346370

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.

REFERENCES:
patent: 3842370 (1974-10-01), Fong
patent: 4135397 (1979-01-01), Krake
Hewlett Packard Application Note 174-10 for 5345 Electronic Counter.

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