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61 条记录 (耗时 0.017 秒)

    MONITORING APPARATUS AND MONITORING METHOD
    41.
    发明申请
    MONITORING APPARATUS AND MONITORING METHOD 有权

    公开(公告)号：US20210301466A1

    公开(公告)日：2021-09-30

    申请号：US17211974

    申请日：2021-03-25

    申请人： VALMET AUTOMATION OY

    发明人： Kimmo MEHTOMAA ,  Kari ERKKILÄ ,  Juha-Matti HEINONEN ,  Sami KÄHKÖLÄ ,  Jukka ÖSTERHOLM

    IPC分类号： D21G3/00 ,  D21G9/00 ,  G01H17/00 ,  G01L1/10

    摘要： A monitoring apparatus for a doctoring comprises a vibration sensor which is individual and is attached at a discrete location of a doctor blade arrangement, the at least one vibration sensor converting a mechanical vibration of the doctor blade arrangement to an electrical signal, the mechanical vibration being caused by the doctor blade in response to a scraping operation of a rotating roll which is in contact with a moving web. A data processing unit receives the electrical signal carrying information on the vibration, compares said vibration with a reference of at least one previous measurement of a same grade of the web, and start one or more preventive actions in order to avoid a drop-through in the case said vibration exceeds at least one boundary of the reference.

    METHOD FOR CONTROLLING CARRYOVER IN A CHEMICAL RECOVERY BOILER AND A CHEMICAL RECOVERY BOILER
    42.
    发明申请
    METHOD FOR CONTROLLING CARRYOVER IN A CHEMICAL RECOVERY BOILER AND A CHEMICAL RECOVERY BOILER 有权

    公开(公告)号：US20210071361A1

    公开(公告)日：2021-03-11

    申请号：US17015635

    申请日：2020-09-09

    申请人： Valmet Automation Oy

    发明人： Jarmo MANSIKKASALO ,  Jukka KOSKINEN

    IPC分类号： D21C11/12 ,  F23G7/04

    摘要： A method for controlling carryover in a chemical recovery boiler. The method comprises feeding black or brown liquor to a furnace of the chemical recovery boiler through an injection gun to burn the black or brown liquor. The chemical recovery boiler comprises a bullnose, which narrows the furnace, and a first superheater, of which at least a part is arranged at a higher vertical level than the bullnose. The method comprises measuring information indicative of a spatial temperature distribution on a cross section of the furnace, wherein the cross section is above the injection gun and below the first superheater; determining primary information indicative of carryover using the information indicative of the spatial temperature distribution on the cross section of the furnace; and controlling a temperature of the black or brown liquor that is fed to the furnace using the primary information. In addition, a system for performing the method.

    Wireless control for process automation
    48.
    发明授权
    Wireless control for process automation 有权

    公开(公告)号：US09672093B2

    公开(公告)日：2017-06-06

    申请号：US14131521

    申请日：2011-07-11

    申请人： Mats Friman ,  Joona Nikunen

    发明人： Mats Friman ,  Joona Nikunen

    IPC分类号： G06F11/07 ,  G05B9/02 ,  G05B19/401

    CPC分类号： G06F11/079 ,  G05B9/02 ,  G05B19/401 ,  G05B2219/24015

    摘要： A control loop includes a process controller for controlling a field device in a process. A remote measurement transmitter measures a desired process variable and transmits the measured variable as a wireless measurement signal to a wireless interface unit on the controller side. The interface unit passes the received measurement signal, and a trigger signal indicating a reception of a new measurement, to an adaptive estimator. When triggered by a trigger signal from the wireless interface, i.e. when a new measurement value is received, the adaptive estimator outputs the new value measurement value to the process controller. Otherwise, between consecutive trigger signals, the adaptive estimator generates an estimated measurement value that gradually moves towards a setpoint according to a predetermined estimation algorithm or process.

    Controller And Method For Controlling A Property Of An Object
    49.
    发明申请
    Controller And Method For Controlling A Property Of An Object 审中-公开
    控制和控制对象属性的方法

    公开(公告)号：US20150330022A1

    公开(公告)日：2015-11-19

    申请号：US14654028

    申请日：2012-12-21

    申请人： VALMET AUTOMATION OY

    发明人： Calvin FU ,  Jarmo OLLANKETO ,  Mira KIVIMÄKI

    IPC分类号： D21G9/00 ,  G05B17/02

    CPC分类号： D21G9/0009 ,  G05B17/02

    摘要： An apparatus in a manufacturing process of a sheet including: a measurement arrangement, a controller and an actuator arrangement regulating at least one property of the sheet; the measurement arrangement being configured to provide the controller with controlled variable data about at least one property of the sheet; the controller having available a predetermined model based on temporally or spatially dependent disturbance; and the controller being configured to form a manipulated variable for the actuator arrangement on the basis of the model in response to the disturbance.

    摘要翻译： 一种片材制造过程中的装置，包括：测量装置，控制器和调节片材的至少一种性质的致动器装置; 所述测量装置被配置为向所述控制器提供关于所述片材的至少一个属性的受控变量数据; 所述控制器基于时间上或空间上依赖的干扰而具有可用的预定模型; 并且所述控制器被配置为基于所述模型响应于所述扰动而形成用于所述致动器装置的操纵变量。