Patents by Inventor Dan D. Christensen

Dan D. Christensen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140280678
    Abstract: A device supporting big data in a process plant includes an interface to a communications network, a cache configured to store data observed by the device, and a multi-processing element processor to cause the data to be cached and transmitted (e.g., streamed) for historization at a unitary, logical centralized data storage area. The data storage area stores multiple types of process control or plant data using a common format. The device time-stamps the cached data, and, in some cases, all data that is generated or created by or received at the device may be cached and/or streamed. The device may be a field device, a controller, an input/output device, a network management device, a user interface device, or a historian device, and the device may be a node of a network supporting big data in the process plant. Multiple devices in the network may support layered or leveled caching of data.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Applicant: FISHER-ROSEMOUNT SYSTEMS, INC.
    Inventors: Mark J. Nixon, Terrence L. Blevins, Dan D. Christensen, Paul Richard Muston, Ken J. Beoughter
  • Patent number: 7519083
    Abstract: A process control routine may include a first internal function block for executing a control operation based on an input signal and an information conduit communicatively connected to the first internal function block. The information conduit may have an output adapted to provide the input signal to the first internal function block. The process control routine may further include an external function block communicatively connected to the information conduit and adapted to generate the input signal such that the output signal is directly provided to the information conduit prior to the execution of the control operation.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: April 14, 2009
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Dennis L. Stevenson, Vasiliki Tzovla, Larry O. Jundt, Dan D. Christensen, Steve L. Dienstbier
  • Publication number: 20040213285
    Abstract: A process control routine may include a first internal function block for executing a control operation based on an input signal and an information conduit communicatively connected to the first internal function block. The information conduit may have an output adapted to provide the input signal to the first internal function block. The process control routine may further include an external function block communicatively connected to the information conduit and adapted to generate the input signal such that the output signal is directly provided to the information conduit prior to the execution of the control operation.
    Type: Application
    Filed: May 18, 2004
    Publication date: October 28, 2004
    Inventors: Dennis L. Stevenson, Vasiliki Tzovla, Larry O. Jundt, Dan D. Christensen, Steve L. Dienstbier
  • Patent number: 6738388
    Abstract: A process controller that is communicatively coupled to an external field device via a communication network uses a shadow function block disposed within a process controller to enable implementation of a control routine that uses both an internal function block disposed within the process controller and an external function block disposed within the external field device. The shadow function block includes a communication port that communicates with the external function block via the communication network to thereby receive data pertaining to the external function block, a memory that stores the received data according to a configuration protocol of the internal function block and an output that provides the stored external function block data to the internal function block according to the configuration protocol of the internal function block.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: May 18, 2004
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Dennis L. Stevenson, Vasiliki Tzovla, Larry O. Jundt, Dan D. Christensen, Steve L. Dienstbier
  • Patent number: 6098116
    Abstract: A digital control system automatically senses when a new controller is attached to a network and determines the number and types of I/O Ports that are attached to the new controller. The digital control system formats and displays the I/O Port information upon request by a user. The digital control system program also includes an automatic configuration program that responds to sensing of a new controller by automatically configuring the input/output (I/O) subsystem. The user adds a new controller without setting any physical switches or nodes. A user optionally supplies configuration information for a device into a database, prior to connection of a device. Upon connection of the device, the device is automatically sensed and configured using the database configuration information, without setting of physical switches or node address information on the devices.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: August 1, 2000
    Assignee: Fisher-Rosemont Systems, Inc.
    Inventors: Mark Nixon, Ken D. Krivoshein, John R. Shepard, Dan D. Christensen, Duncan Schleiss
  • Patent number: 5980078
    Abstract: A digital control system with a predetermined configuration automatically senses the connection to a network of a digital device that is not included in the predetermined configuration. The digital device is assigned temporary address information and placed in a temporary state, called a standby state, in which the digital device supplies information to the digital control system allowing a user to access the digital device including access of device information and configuration parameters. Using the device information and configuration parameters, a user selectively commissions the digital device by assigning a physical device tag, a device address, and a device identification, and installing a control strategy to the digital device, thereby placing the digital device in an operational state in communication with the digital control system.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: November 9, 1999
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Ken D. Krivoshein, Dan D. Christensen
  • Patent number: RE40817
    Abstract: A digital control system with a predetermined configuration automatically senses the connection to a network of a digital device that is not included in the predetermined configuration. The digital device is assigned temporary address information and placed in a temporary state, called a standby state, in which the digital device supplies information to the digital control system allowing a user to access the digital device including access of device information and configuration parameters. Using the device information and configuration parameters, a user selectively commissions the digital device by assigning a physical device tag, a device address, and a device identification, and installing a control strategy to the digital device, thereby placing the digital device in an operational state in communication with the digital control system.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: June 30, 2009
    Assignee: Fisher-Rosemount Systems, Inc.
    Inventors: Ken D. Krivoshein, Dan D. Christensen