Patents by Inventor Chunhe Zhou
Chunhe Zhou 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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Publication number: 20240069578Abstract: A control system is configured to monitor operation of a flow control, like a control valve. These configurations can use of continuous or real-time data to evaluate fitness or function of the device under operating conditions. This feature can alert operators to problems or issues with one or more devices, or process lines in total. These problems may, for example, indicate that a valve is incorrectly sized for actual working conditions. As a result, engineers may find that the valve is too big (or oversize) or too small (or undersize) because the design process for layout of the process line relies upon a design load that reflects a future maximum (plus some factor of safety), and not the actual working conditions that might prevail once the device is in service in the field.Type: ApplicationFiled: August 31, 2022Publication date: February 29, 2024Inventors: Vladimir Dimitrov Kostadinov, Joseph Georges Shahda, Cyril Nicolas Vlassoff, Jeremy Asher Glaun, David Chunhe Zhou, Christopher Bittner, Justin Walter Betley
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Patent number: 6745084Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: April 10, 2001Date of Patent: June 1, 2004Assignee: Dresser, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Patent number: 6453261Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: April 10, 2001Date of Patent: September 17, 2002Assignee: Dresser, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010037670Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: November 8, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010037159Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: November 1, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Publication number: 20010032518Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: ApplicationFiled: April 10, 2001Publication date: October 25, 2001Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares
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Patent number: 6272401Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.Type: GrantFiled: July 17, 1998Date of Patent: August 7, 2001Assignee: Dresser Industries, Inc.Inventors: Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares