초록 ▼

In a continuous casting apparatus, the level of liquid in the mold is monitored and compared to a desired reference level. A microcomputer examines the resulting error signal and determines the amount of movement of the valve which would be appropriate to correct the detected error. A control pulse

In a continuous casting apparatus, the level of liquid in the mold is monitored and compared to a desired reference level. A microcomputer examines the resulting error signal and determines the amount of movement of the valve which would be appropriate to correct the detected error. A control pulse is then generated having a duration corresponding to the desired movement distance, and the valve is adjusted accordingly.

대표청구항 ▼

In a continuous casting apparatus of the type wherein liquid metal is supplied from a liquid reservoir to a mold through a valve mechanism, said valve mechanism having a movable valve member the position of which determines the rate at which said liquid is supplied to said mold, detection means for

In a continuous casting apparatus of the type wherein liquid metal is supplied from a liquid reservoir to a mold through a valve mechanism, said valve mechanism having a movable valve member the position of which determines the rate at which said liquid is supplied to said mold, detection means for detecting the level of liquid in said mold, comparison means for comparing the detected liquid level with a desired level to generate an error signal, control signal generating means for generating a control signal in response to said error signal and control means for moving said valve member in response to said control signal, said control signal generating means comprising: first means responsive to said error signal for generating a first signal corresponding to a desired change in the position of said valve member, said first means comprising means for receiving a sequence of said error signals and for calculating a value FO according to: FO=KG[(E1-E2)+KI(E1)+KD(E1-2E2+E3)] where E1, E2 and E3 are consecutive error signals and KG, KI and KD are predetermined constants; and second means responsive to the value of said first signal for generating said control signal having a duration corresponding to said first signal.