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1. WO2012087808 - METHOD AND SYSTEM FOR DIAGNOSING A FAULT OR OPEN CIRCUIT IN A NETWORK

Publication Number WO/2012/087808
Publication Date 28.06.2012
International Application No. PCT/US2011/065451
International Filing Date 16.12.2011
IPC
G01R 31/08 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
CPC
H04L 12/40169
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
28characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
40Bus networks
40169Flexible bus arrangements
H04L 2012/40215
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
12Data switching networks
28characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
40Bus networks
40208characterized by the use of a particular bus standard
40215Controller Area Network CAN
H04L 41/0609
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
41Arrangements for maintenance or administration or management of packet switching networks
06involving management of faults or events or alarms
0604Alarm or event filtering, e.g. for reduction of information
0609based on severity or priority
H04L 43/50
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
43Arrangements for monitoring or testing packet switching networks
50Testing arrangements
Applicants
  • DEERE & COMPANY [US]/[US] (AllExceptUS)
  • SMART, David, C. [US]/[US] (UsOnly)
  • SCHLICHTMANN, Michael, R. [US]/[US] (UsOnly)
  • LANDMAN, Ronald, G. [US]/[US] (UsOnly)
Inventors
  • SMART, David, C.
  • SCHLICHTMANN, Michael, R.
  • LANDMAN, Ronald, G.
Agents
  • BARTHOLOMEW, Darin, E.
Priority Data
13/099,45503.05.2011US
61/424,92620.12.2010US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND SYSTEM FOR DIAGNOSING A FAULT OR OPEN CIRCUIT IN A NETWORK
(FR) PROCÉDÉ ET SYSTÈME DE DIAGNOSTIC D'UNE DÉFAILLANCE OU D'UN CIRCUIT OUVERT DANS UN RÉSEAU
Abstract
(EN)
A fault injection circuit (34) injects a test signal into a data bus (17) with a normal high logic level and a normal low logic level. The test signal has a greater logic level greater than the normal high logic level of the data bus (17) or a lower logic level lower than the normal low logic level of the data bus (17). An analog-to- digital converter (36) is coupled to a voltage level detector (35) for sensing an aggregate level of an aggregate signal on the data bus (17). The aggregate signal is composed of the termination circuit signal and the test signal. A diagnostic tool (10) determines whether a faulty connection between the data bus (17) and a network device (44, 144, 244) exists, where the sensed aggregate level exceeds at least one of the normal high logic level and the normal low logic level.
(FR)
Selon l'invention, un circuit d'injection de défaut (34) injecte un signal de test dans un bus de données (17) avec un niveau logique haut normal et un niveau logique bas normal. Le signal de test a un niveau logique supérieur au niveau logique haut normal du bus de données (17) ou un niveau logique inférieur au niveau logique bas normal du bus de données (17). Un convertisseur analogique-numérique (36) est couplé à un détecteur de niveau de tension (35) pour détecter un niveau agrégé d'un signal agrégé sur le bus de données (17). Le signal agrégé est composé du signal de circuit de terminaison et du signal de test. Un outil de diagnostic (10) détermine si une connexion défectueuse entre le bus de données (17) et un dispositif de réseau (44, 144, 244) existe, lorsque le niveau agrégé détecté dépasse au moins l'un du niveau logique haut normal et du niveau logique bas normal.
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