公开(公告)号：US3829848A

公开(公告)日：1974-08-13

申请号：US12871971

申请日：1971-03-29

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： EICKELBERG J ,  RICE J

IPC: D21F1/00 ,  D21G9/00 ,  G08B21/00

CPC classification number: D21G9/0009 ,  D21F1/00

Abstract: A system for and method of determining if an actuator, such as a motor driving a stem of a valve in a line feeding a fibrous slurry to a paper making machine, is in a stuck condition includes a position transducer for the actuator. A control signal for the actuator may be periodically supplied to the actuator. A computer responds to the magnitude of the control signal and an indication of the actual position of the actuator, as derived by an analog-to-digital converter responsive to a position transducer for the actuator. The computer compares the position of the actuator before and after the control signal is supplied to the actuator. In response to the two positions being the same, a signal indicative of the amount the actuator should have moved in response to the control signal is derived and compared with a predetermined value for the minimum amount of detectable movement for the actuator to derive a stuck actuator alarm signal selectively.

Abstract translation: 一种系统和方法，用于确定诸如驱动管线中的阀门的马达的致动器是否处于卡纸状态，该状态包括用于致动器的位置传感器。 可以将致动器的控制信号周期性地提供给致动器。 计算机响应控制信号的大小以及响应于用于致动器的位置传感器的模拟 - 数字转换器得出的致动器的实际位置的指示。 计算机将执行器的位置与控制信号提供给执行器之前和之后进行比较。 响应于两个位置相同，导出指示致动器响应于控制信号的量的量的信号，并将其与用于致动器的可检测运动的最小量的预定值进行比较以导出卡住的致动器 报警信号选择。