Patents by Inventor Deji Chen
Deji Chen 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).
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Patent number: 11199824Abstract: A control technique controls a process in a manner that reduces the number of controller changes provided to a controlled device, and so reduces the power consumption of the controlled device along with the loading of a process control communications network disposed between the controller and the controlled device. This technique is very useful in a control system having wirelessly connected field devices, such as sensors and valves which, in many cases, operate off of battery power. Moreover, the control technique is useful in implementing a control system in which control signals are subject to intermittent, non-synchronized or significantly delayed communications and/or in a control system that receives intermittent, non-synchronized or significantly delayed process variable measurements to be used as feedback signals in the performance of closed-loop control.Type: GrantFiled: March 19, 2015Date of Patent: December 14, 2021Assignee: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Terrence L. Blevins, Mark J. Nixon, Kurtis K. Jensen, Mitchell S. Panther, Deji Chen, Eric D. Rotvold
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Patent number: 10656627Abstract: A big data network or system for a process control system or plant includes a data storage device configured to receive process control data from control system devices and store the process control data. The big data network or system identifies various parameters or attributes from the process control data, and creates and uses rowkeys to store the parameters according to various combinations, such as combinations using timestamps. The big data network or system may also store certain aggregate data analyses associated with time periods specified by the timestamps. Accordingly, the big data network or system efficiently stores real-time data having measurements within a database schema, and users or administrators can leverage the aggregate data to analyze certain data associated with certain time periods.Type: GrantFiled: April 28, 2017Date of Patent: May 19, 2020Assignee: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark J. Nixon, Paul Richard Muston, Deji Chen, Song Han
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Patent number: 9772623Abstract: Techniques for securing a device for use in or with a process plant include provisioning the device with a key generated at least in part from data indicative of necessary conditions and/or attributes that must be met before the device is allowed access to a network of the process plant. Upon initialization, the device determines, based on the key, whether or not the necessary conditions are met, and the device isolates itself or accesses the process control network accordingly. Keys and the necessary conditions/attributes indicated therein may be based on, for example, location, time, context, customer, supplier, particular plant, manufacturer, user, data type, device type, and/or other criteria. Additionally, sub-keys associated with a key may be generated from another set of necessary conditions/attributes. Sub-keys may be provided by a different entity than the key provider entity.Type: GrantFiled: July 18, 2016Date of Patent: September 26, 2017Assignee: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark J. Nixon, Ken J. Beoughter, Daniel D. Christensen, Deji Chen, James H. Moore, Jr.
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Publication number: 20170235298Abstract: A big data network or system for a process control system or plant includes a data storage device configured to receive process control data from control system devices and store the process control data. The big data network or system identifies various parameters or attributes from the process control data, and creates and uses rowkeys to store the parameters according to various combinations, such as combinations using timestamps. The big data network or system may also store certain aggregate data analyses associated with time periods specified by the timestamps. Accordingly, the big data network or system efficiently stores real-time data having measurements within a database schema, and users or administrators can leverage the aggregate data to analyze certain data associated with certain time periods.Type: ApplicationFiled: April 28, 2017Publication date: August 17, 2017Inventors: Mark J. Nixon, Paul Richard Muston, Deji Chen, Song Han
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Patent number: 9665088Abstract: A big data network or system for a process control system or plant includes a data storage device configured to receive process control data from control system devices and store the process control data. The big data network or system identifies various parameters or attributes from the process control data, and creates and uses rowkeys to store the parameters according to various combinations, such as combinations using timestamps. The big data network or system may also store certain aggregate data analyses associated with time periods specified by the timestamps. Accordingly, the big data network or system efficiently stores real-time data having measurements within a database schema, and users or administrators can leverage the aggregate data to analyze certain data associated with certain time periods.Type: GrantFiled: January 31, 2014Date of Patent: May 30, 2017Assignee: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark J. Nixon, Paul Richard Muston, Deji Chen, Song Han
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Publication number: 20160327942Abstract: Techniques for securing a device for use in or with a process plant include provisioning the device with a key generated at least in part from data indicative of necessary conditions and/or attributes that must be met before the device is allowed access to a network of the process plant. Upon initialization, the device determines, based on the key, whether or not the necessary conditions are met, and the device isolates itself or accesses the process control network accordingly. Keys and the necessary conditions/attributes indicated therein may be based on, for example, location, time, context, customer, supplier, particular plant, manufacturer, user, data type, device type, and/or other criteria. Additionally, sub-keys associated with a key may be generated from another set of necessary conditions/attributes. Sub-keys may be provided by a different entity than the key provider entity.Type: ApplicationFiled: July 18, 2016Publication date: November 10, 2016Inventors: Mark J. Nixon, Ken J. Beoughter, Daniel D. Christensen, Deji Chen, James H. Moore, JR.
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Patent number: 9397836Abstract: Techniques for securing a device for use in or with a process plant include provisioning the device with a key generated at least in part from data indicative of necessary conditions and/or attributes that must be met before the device is allowed access to a network of the process plant. Upon initialization, the device determines, based on the key, whether or not the necessary conditions are met, and the device isolates itself or accesses the process control network accordingly. Keys and the necessary conditions/attributes indicated therein may be based on, for example, location, time, context, customer, supplier, particular plant, manufacturer, user, data type, device type, and/or other criteria. Additionally, sub-keys associated with a key may be generated from another set of necessary conditions/attributes. Sub-keys may be provided by a different entity than the key provider entity.Type: GrantFiled: August 11, 2014Date of Patent: July 19, 2016Assignee: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark J. Nixon, Ken J. Beoughter, Daniel D. Christensen, Deji Chen, James H. Moore, Jr.
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Publication number: 20160043866Abstract: Techniques for securing a device for use in or with a process plant include provisioning the device with a key generated at least in part from data indicative of necessary conditions and/or attributes that must be met before the device is allowed access to a network of the process plant. Upon initialization, the device determines, based on the key, whether or not the necessary conditions are met, and the device isolates itself or accesses the process control network accordingly. Keys and the necessary conditions/attributes indicated therein may be based on, for example, location, time, context, customer, supplier, particular plant, manufacturer, user, data type, device type, and/or other criteria. Additionally, sub-keys associated with a key may be generated from another set of necessary conditions/attributes. Sub-keys may be provided by a different entity than the key provider entity.Type: ApplicationFiled: August 11, 2014Publication date: February 11, 2016Inventors: Mark J. Nixon, Ken J. Beoughter, Daniel D. Christensen, Deji Chen, James H. Moore, JR.
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Publication number: 20150220080Abstract: A big data network or system for a process control system or plant includes a data storage device configured to receive process control data from control system devices and store the process control data. The big data network or system identifies various parameters or attributes from the process control data, and creates and uses rowkeys to store the parameters according to various combinations, such as combinations using timestamps. The big data network or system may also store certain aggregate data analyses associated with time periods specified by the timestamps. Accordingly, the big data network or system efficiently stores real-time data having measurements within a database schema, and users or administrators can leverage the aggregate data to analyze certain data associated with certain time periods.Type: ApplicationFiled: January 31, 2014Publication date: August 6, 2015Applicant: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark J. Nixon, Paul Richard Muston, Deji Chen, Song Han
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Publication number: 20150192907Abstract: A control technique controls a process in a manner that reduces the number of controller changes provided to a controlled device, and so reduces the power consumption of the controlled device along with the loading of a process control communications network disposed between the controller and the controlled device. This technique is very useful in a control system having wirelessly connected field devices, such as sensors and valves which, in many cases, operate off of battery power. Moreover, the control technique is useful in implementing a control system in which control signals are subject to intermittent, non-synchronized or significantly delayed communications and/or in a control system that receives intermittent, non-synchronized or significantly delayed process variable measurements to be used as feedback signals in the performance of closed-loop control.Type: ApplicationFiled: March 19, 2015Publication date: July 9, 2015Inventors: Terrence L. Blevins, Mark J. Nixon, Kurtis K. Jensen, Mitchell S. Panther, Deji Chen, Eric D. Rotvold
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Patent number: 8908666Abstract: A communication method operates to seamlessly transmit internet protocol (IP) data frames, such as IPv6 data frames, over a communication network that uses a non-IP network routing protocol, i.e., a communication network that implements a network routing protocol other than, or that is incompatible with an IP network routing protocol, such as the WirelessHART protocol. This communication method enables, for example, field devices or other intelligent devices within a process plant network that uses a non-IP communication network to perform messaging of IP data frames generated at or to be received by internet protocol enabled devices either within the process plant network or outside of the process plant network.Type: GrantFiled: September 14, 2012Date of Patent: December 9, 2014Assignee: Fisher-Rosemount Systems, Inc.Inventors: Mark Nixon, Song Han, Eric Rotvold, Deji Chen
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Patent number: 8811199Abstract: A first node sends a first message to a second node. The second node sends a second message to the first node. A first elapsed time is measured from the beginning of the transmission of the first message to the beginning of receipt of the second message. A second elapsed time is measured from the beginning of the receipt of the first message to the beginning of the transmission of the second message. The second node sends a third message to the first node containing the second elapsed time. The distance between the first and second node is calculated based on these elapsed times and a calibration count multiplier contained in the second or third message. A node may be moved within a wireless mesh network. Positional information about the node and distances to its neighbors is determined and transmitted to the network manager where it is stored.Type: GrantFiled: November 6, 2009Date of Patent: August 19, 2014Assignee: Rosemount Inc.Inventors: Mark Nixon, Robert Karschnia, Eric Rotvold, Trevor Duncan Schleiss, Deji Chen
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Patent number: 8611250Abstract: A method and system of communicating between a wireless network and a process control system communicatively coupled to a server, such as OPC. The server receives data from the wireless network, where the data is generated from an input/output data point within the wireless network. The server maps the data between the input/output data point and a data point placeholder within the process control system. The server writes the mapped data to the corresponding data point placeholder of the process control system via a process control interface, and the mapped data is provided to the process control system as process control data native to the process control system. Process control data may also be provided to the server, mapped between a data point placeholder of the process control system and an input/output data point of the wireless network, and written to the corresponding input/output data point.Type: GrantFiled: September 22, 2010Date of Patent: December 17, 2013Assignee: Fisher-Rosemount Systems, Inc.Inventors: Deji Chen, Shenling Yang, Mark J. Nixon, Tom Aneweer, John R. Shepard, Aloysius K. Mok
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Patent number: 8505036Abstract: An application programming interface schema, method and system for communicating between first and second application programming interfaces within a process control system includes processing a call from a first application programming interface for a data request, translating the data request from the first application programming interface into one or more methods of a unified application programming interface, and implementing the one or more methods of the unified application programming interface with a second application programming interface. A first unified layer receives a transmission request from a proprietary application programming interface, and translates the transmission request into one or more methods of a unified application programming interface. A second unified layer implements methods of the unified application programming interface with the wireless network application programming interface.Type: GrantFiled: September 29, 2006Date of Patent: August 6, 2013Assignee: Fisher-Rosemount Systems, Inc.Inventors: Deji Chen, Mark J. Nixon, Tom Aneweer, John R. Shepard, Aloysius K. Mok
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Publication number: 20130070745Abstract: A communication method operates to seamlessly transmit internet protocol (IP) data frames, such as IPv6 data frames, over a communication network that uses a non-IP network routing protocol, i.e., a communication network that implements a network routing protocol other than, or that is incompatible with an IP network routing protocol, such as the WirelessHART protocol. This communication method enables, for example, field devices or other intelligent devices within a process plant network that uses a non-IP communication network to perform messaging of IP data frames generated at or to be received by internet protocol enabled devices either within the process plant network or outside of the process plant network.Type: ApplicationFiled: September 14, 2012Publication date: March 21, 2013Applicant: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Mark Nixon, Song Han, Eric Rotvold, Deji Chen
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Patent number: 7945339Abstract: Disclosed is a controller having a processor and a control module adapted for periodic execution by the processor and configured to be responsive to a process variable to generate a control signal for a process. An iteration of the periodic execution of the control module involves implementation of a routine configured to generate a representation of a process response to the control signal. The routine is further configured to maintain the representation over multiple iterations of the periodic execution of the control module and until an update of the process variable is available. In some cases, the update of the process variable is made available via wireless transmission of the process signal. In those and other cases, the controller may be included within a process control system having a field device to transmit the process signal indicative of the process variable non-periodically based on whether the process variable has changed by more than a predetermined threshold.Type: GrantFiled: August 7, 2009Date of Patent: May 17, 2011Assignee: Fisher-Rosemount System, Inc.Inventors: Terrence Lynn Blevins, Deji Chen, Mark J. Nixon, Gregory K. McMillan
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Publication number: 20110110242Abstract: A first node sends a first message to a second node. The second node sends a second message to the first node. A first elapsed time is measured from the beginning of the transmission of the first message to the beginning of receipt of the second message. A second elapsed time is measured from the beginning of the receipt of the first message to the beginning of the transmission of the second message. The second node sends a third message to the first node containing the second elapsed time. The distance between the first and second node is calculated based on these elapsed times and a calibration count multiplier contained in the second or third message. A node may be moved within a wireless mesh network. Positional information about the node and distances to its neighbors is determined and transmitted to the network manager where it is stored.Type: ApplicationFiled: November 6, 2009Publication date: May 12, 2011Applicant: ROSEMOUNT INC.Inventors: Mark Nixon, Robert Karschnia, Eric Rotvold, Trevor Duncan Schleiss, Deji Chen
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Publication number: 20110015764Abstract: A method and system of communicating between a wireless network and a process control system communicatively coupled to a server, such as OPC. The server receives data from the wireless network, where the data is generated from an input/output data point within the wireless network. The server maps the data between the input/output data point and a data point placeholder within the process control system. The server writes the mapped data to the corresponding data point placeholder of the process control system via a process control interface, and the mapped data is provided to the process control system as process control data native to the process control system. Process control data may also be provided to the server, mapped between a data point placeholder of the process control system and an input/output data point of the wireless network, and written to the corresponding input/output data point.Type: ApplicationFiled: September 22, 2010Publication date: January 20, 2011Applicant: FISHER-ROSEMOUNT SYSTEMS, INC.Inventors: Deji Chen, Shenling Yang, Mark Nixon, Tom Aneweer, John R. Shepard, Aloysius K. Mok
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Patent number: 7822802Abstract: A method and system of communicating between a wireless network and a process control system communicatively coupled to a server via a process control system interface, such as OPC or a proprietary API. The wireless network may be a mesh network and the server may be a mesh server. The server receives data from the wireless network, where the data is generated from an input/output data point within the wireless network. The server maps the data between the input/output data point and a data point placeholder within the process control system. The server writes the mapped data to the corresponding data point placeholder of the process control system via the process control interface, and the mapped data is provided to the process control system as process control data native to the process control system.Type: GrantFiled: September 29, 2006Date of Patent: October 26, 2010Assignee: Fisher-Rosemount Systems, Inc.Inventors: Deji Chen, Shenling Yang, Mark J. Nixon, Tom Aneweer, John R. Shepard, Aloysius K. Mok
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Patent number: 7640007Abstract: A handheld communicator wirelessly interfaces or communicates with individual devices in a process control system, such as field devices, controllers, etc., to wirelessly perform monitoring, maintenance, configuration and control activities with respect to those devices. The wireless handheld communicator includes a housing adapted for handheld operation, a processing unit disposed within the housing, a computer readable memory disposed within the housing and coupled to the processing unit and a display, a keypad and a radio frequency transceiver. The handheld communicator may be adapted to communicate with a host system to receive information needed to communicate with various field devices in the process plant and may then be used to wirelessly communicate with each of the various field devices directly while in close proximity to the field devices to perform monitoring and configuration activities with respect to the field devices.Type: GrantFiled: December 10, 2004Date of Patent: December 29, 2009Assignee: Fisher-Rosemount Systems, Inc.Inventors: Deji Chen, Mark J. Nixon, Kent A. Burr, Neil J. Peterson