Stowe Woodward Inc.

Stowe Woodward Ag

Sw Paper Inc.

Stowe Woodward Licensco LLC

Stowe Woodward Liensco, Inc.

Robert H Moore

Eric J Gustafson

Franz Danzler

Andreas Lutz

William B Kennedy

David L Murphy

Balaji T Srinivasan

A system for determining the source of vibration of a nipped roll assembly includes: a first substantially cylindrical roll; a mating structure positioned relative to the first roll to form a nip therewith; a plurality of annular nip condition sensor units mounted on the first roll; each of the annular nip condition sensor units being positioned at different axial locations along the first roll and configured to provide nip condition signals from the nip, the signals indicating a nip condition at multiple circumferential locations; and a processor associated with the sensor units that receives signals from the sensor units. The processor is configured to convert the signals from the sensor units into nip condition readings for the multiple circumferential locations at each axial location. Such a system can detect irregularities in a roll or the mating structure that can cause undesired vibration.

System and method for detecting and measuring vibration in an industrial roll

An industrial roll includes: a substantially cylindrical shell having an outer surface; a polymeric cover circumferentially overlying the shell outer surface; and a sensing system. The sensing system includes: a plurality of sensors embedded in the cover, each sensor configured to sense a data parameter; and a plurality of wireless transceivers, each transceiver connected to a respective sensor and embedded in the cover adjacent thereto. Each wireless transceiver is configured to transmit data signals from the respective sensor. Related methods and systems are also discussed.

Wireless sensors in roll covers

According to some embodiments of the present invention, a system for determining characteristics of two rolls configured in a nip press includes a strip configured to be placed in the nip press. A plurality of sensors embedded in the strip is configured to generate signals representative of the pressure and/or the nip width between the two rolls. Interface circuitry facilitates addressing of individual ones of the plurality of sensors via a data processing system.

Nip press sensing system including a sensor strip having sensor interface electronics associated therewith and methods of operating the same

Devices for measuring a nip width between rolls of a press nip include one or more sensors adapted to be placed in the nip while the nip is stationary. The electrical resistance of each sensor corresponds to the size of the nip width, whereby a nip width or a nip width distribution may be determined by measuring the sensor resistance(s). Methods of measuring a nip width distribution include providing a plurality of force sensitive resistor sensors each of which respond to pressure applied thereto to provide a variable sensor resistance as a function of the amount of pressure and the area of the pressure exerted on the sensor.

Nip width sensing system and method

A roll sensing system for measuring the pressure distribution and nip width in a nip roll press. The sensing system comprises a strip having sensors thereon, the strip being placed in a nip press, for sensing the pressure at several locations therealong. At one end of the strip lies electronics associated with the sensors. The electronics communicate with an optional multiplexer and a bidirectional transmitter for signal transmission to an external signal conditioner and an external computer. The computer determines pressure values and nip width values at various locations along the strip, and communicates with a display which provides a visual, graphical and/or numerical data to the operator. Optionally, a control system can be in communication with the transmitter or the computer to initiate crown corrections in response to pressure or nip width readings.

Nip pressure sensing system

Nip width sensing system

A system for measuring the dynamic pressure distribution between rolls in a nip roll press comprises a roll adapted to rotatingly contact at least one other roll in a press nip, having one or more sensors thereon, for measuring the nip pressure at several locations along the roll length, wherein the measurements obtained by the sensors are transmitted to a computer and a display, to provide tabular, numerical and graphical representations of the pressure at one or more locations on the roll. Optionally a control system may be incorporated in the system for determining the pressure distribution along the roll and initiating corrective measures. The system of the instant invention can further measure temperature variations, if desired, as thermal sensors can be used on the sensing roll, or a computerized correlation scheme can relate sensor readings to temperature as well as pressure.

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Winchester, VA, United States of America

Robert H Moore