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1. (WO1991018334) METHOD OF OPERATING A POSITION-MEASUREMENT SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018334 International Application No.: PCT/DE1991/000412
Publication Date: 28.11.1991 International Filing Date: 21.05.1991
Chapter 2 Demand Filed: 17.12.1991
IPC:
G05B 19/4062 (2006.01) ,G06F 9/46 (2006.01)
G PHYSICS
05
CONTROLLING; REGULATING
B
CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
19
Programme-control systems
02
electric
18
Numerical control (NC), i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
406
characterised by monitoring or safety
4062
Monitoring servoloop, e.g. overload of servomotor, loss of feedback or reference
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
9
Arrangements for programme control, e.g. control unit
06
using stored programme, i.e. using internal store of processing equipment to receive and retain programme
46
Multiprogramming arrangements
Applicants:
SIEMENS AKTIENGESELLSCHAFT [DE/DE]; Wittelsbacherplatz 2 D-80333 München, DE (AllExceptUS)
FUEHRER, Diethelm [DE/DE]; DE (UsOnly)
Inventors:
FUEHRER, Diethelm; DE
Common
Representative:
SIEMENS AG; Postfach 22 16 34 D-8000 München 22, DE
Priority Data:
P 40 16 481.022.05.1990DE
Title (DE) VERFAHREN ZUM BETRIEB EINES LAGEMESSYSTEMS
(EN) METHOD OF OPERATING A POSITION-MEASUREMENT SYSTEM
(FR) PROCEDE POUR L'EXPLOITATION D'UN SYSTEME DE MESURE DE POSITION
Abstract:
(DE) Wenn in einem vorgegebenen Zeittakt (delta T) die Lagesignale von Gebersystemen (G1, G2), insbesondere von absoluten Winkelcodieren, ausgewertet werden, können sporadische Fehlmessungen den Betrieb stören. Gemäß der Erfindung wird daher jeder Lagemessung eine zeitlich dicht (delta t) folgende Hilfsmessung nachgeordnet. Diese wird dann als Lagemessung herangezogen, wenn sicht ergibt, daß die eigentliche Lagemessung fehlerhaft sein muß, da zur vorangegangenen Lagemessung eine Geschwindigkeitsdifferenz besteht, die aufgrund der betrieblichen Beschleunigung nicht zu erwarten war.
(EN) When the position signals from pick-up systems (G1, G2), in particular absolute angle-encoders, are processed at given time-intervals (delta T), sporadic measurement errors can occur. The invention calls for each position measurement to be followed closely in time (delta t) by a second measurement. The second measurement is used as the position measurement if the main measurement proves to be erroneous, i.e. when there is a difference in speed from the previous measurement which would not have been expected from the normal acceleration.
(FR) Si l'on analyse, dans un cycle temporel prédéterminé (delta T), les signaux de position de systèmes de captage (G1, G2), en particulier de codeurs d'angle absolus, il se peut que des erreurs de mesure sporadiques perturbent le fonctionnement. Selon l'invention, chaque mesure de position est donc suivie, dans un intervalle très bref (delta t), d'une mesure auxiliaire. On a recours à cette mesure auxiliaire si l'on constate que la mesure de position proprement dite doit être erronée, étant donné que pour la mesure de position précédente, il y a une différence de vitesse inattendue en raison de l'accélération de service.
Designated States: BR, JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0530253