Global Patent Index - EP 1159626 A2

EP 1159626 A2 2001-12-05 - OPEN CIRCUIT DETECTOR

Title (en)

OPEN CIRCUIT DETECTOR

Title (de)

VORRICHTUNG ZUM FESTSTELLEN EINER OFFENER REGELKREIS

Title (fr)

DETECTEUR DE CIRCUIT OUVERT

Publication

EP 1159626 A2 (EN)

Application

EP 00905475 A

Priority

  • NO 0000050 W
  • NO 990626 A

Abstract (en)

[origin: WO0048020A2] An open circuit detector for connecting devices in seismic data acquisition systems comprises two transformers (TM, TS), at least one signal source and at least one detection device. The detector is characterized in that the transformers' primary windings (W1M, W1S) are connected to the detection device(s) and the signal source to form a primary circuit for detection of impedance changes, especially those caused by an open circuit condition in the secondary circuit, and the transformers' secondary windings (W2M, W2S) are connected to the connecting device to form a secondary circuit or loop. A method for detection of an open circuit in a connecting device in seismic data acquisition systems by means of a detector comprising two transformers (TM, TS), at least one signal source and at least one detection device is characterized by connecting the transformers' primary windings to the detection device(s) and the test signal source to form a primary circuit, connecting the transformers' secondary windings to the connecting device to form a secondary circuit or loop, detecting impedance changes in the secondary circuit, and determining an open circuit condition based on said detected impedance changes.

IPC 1-7 (main, further and additional classification)

G01R 31/04

IPC 8 full level (invention and additional information)

G01V 1/16 (2006.01)

CPC (invention and additional information)

G01V 1/16 (2013.01)

Citation (search report)

See references of WO 0048020A3

Designated contracting state (EPC)

DE FR GB IT NL

EPO simple patent family

WO 0048020 A2 20000817; WO 0048020 A3 20001228; AU 2700900 A 20000829; CA 2360956 A1 20000817; EP 1159626 A2 20011205; NO 309695 B1 20010312; NO 990626 A 20000811; NO 990626 D0 19990210

INPADOC legal status


2005-03-09 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20040831

2004-05-26 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): DE FR GB IT NL

2001-12-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010619

2001-12-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE