MONITORING OF A LINE SYSTEM

摘要

Monitoring of a line system (1) in which a liquid medium (3) is guided in a line (2). The current pressure of the liquid medium (3) in the line (2) and in the associated current flow are sensed at sensing times. The two values are fed to a computing unit (5). The computing unit (5) calculates a theoretical flow of the liquid medium (3) in the line (2) from the sensed current pressure by taking into account a specified flow function. The flow function describes a physical relationship between the theoretical flow of the liquid medium (3) and the current pressure of the liquid medium (3). The computing unit (5) determines an individual degree of clogging on the basis of the current flow and the theoretical flow. On the basis of a number of determined individual degrees of clogging and by using stochastic methods, the computing unit (5) calculates an interval within which a degree of clogging of the line system (1) lies with a probability to be defined. The line system (1) is monitored by using the size of the interval and/or the position of the interval with respect to first limits for the degree of clogging that are defined beforehand.

主权项

1. A method for monitoring a line system, wherein a liquid medium is guided in at least one line of the line system; the method comprising:
a) sensing the current pressure of the liquid medium in the at least one line and sensing the associated current flow of the liquid in the at least one line; b) receiving the sensed current pressure and the sensed current flow by a computing unit; c) calculating by the computing unit a respective theoretical flow of the liquid medium in the at least one line from the respective sensed current pressure including taking into account a prespecified flow function describing a physical relationship between the theoretical flow of the liquid medium and the respective current pressure of the liquid medium; d) determining by the computing unit a respective individual degree of clogging of the at least one line on the basis of the respective current and the respective theoretical flow; e) calculating by the computing unit an interval within which a degree of clogging of the line system lies with a probability to be defined on the basis of a number of determined individual degrees of clogging using stochastic methods; and f) monitoring the line system by using the size of the calculated interval and/or the position of the calculated interval with respect to first limits for the degree of clogging that are defined beforehand as an indication of the presence of a fault in the line system.