Method and apparatus for determining contact resistance

Details Method and apparatus for determining contact resistance Method and apparatus for determining contact resistance

1998-08-28

2000-12-12

Metjahic, Safet

Electricity: measuring and testing

Electromechanical switching device

Relay

G01R 3102

Patent

active

06160402&

ABSTRACT:
A method and apparatus for determining contact resistance (107) includes pressing a lead connector (105) to make a first contact with a metallic pad (103) and an isolated contact with an isolated metallic pad (108) located adjacent to metallic pad (103). Once the first and isolated contacts are formed, the method includes flowing electrical current at a predetermined level through the isolated contact. With the aid of a volt meter (110), voltage differential across the isolated contact is measured while the electrical current at the predetermined level is flowing through the isolated contact. The contact resistance (107) of the first contact is determined based on information obtained from the voltage differential measured across the isolated contact and the predetermined level of the electrical current. Furthermore, the contact force created at the first contact is determined based on the contact resistance (107).

REFERENCES:
patent: 3996514 (1976-12-01), Brown et al.
patent: 4175253 (1979-11-01), Pitegoff
patent: 4491797 (1985-01-01), Velsher
patent: 4835465 (1989-05-01), Gergin
patent: 5057772 (1991-10-01), Bruno et al.
patent: 5221905 (1993-06-01), Bhangu et al.
patent: 5365180 (1994-11-01), Edelman

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