Invention Grant
US07661439B2 Safety override circuit for pneumatic positioner and method of use thereof
有权
气动定位器的安全覆盖电路及其使用方法
- Patent Title: Safety override circuit for pneumatic positioner and method of use thereof
- Patent Title (中): 气动定位器的安全覆盖电路及其使用方法
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Application No.: US11348572Application Date: 2006-02-07
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Publication No.: US07661439B2Publication Date: 2010-02-16
- Inventor: Mark V. Chester , Peter S. Levesque , Alex J. Legere
- Applicant: Mark V. Chester , Peter S. Levesque , Alex J. Legere
- Applicant Address: US TX Addison
- Assignee: Dresser, Inc.
- Current Assignee: Dresser, Inc.
- Current Assignee Address: US TX Addison
- Agency: Fish & Richardson P.C.
- Main IPC: F16K31/02
- IPC: F16K31/02

Abstract:
Systems and processes may provide improved performance for a pneumatic positioner during a safety override. In certain implementations, a system and process may include the ability to receive an input control signal, power control circuitry of the pneumatic positioner using the input control signal, and generate a control signal for a signal-to-pressure converter with the control circuitry based at least partially on the input control signal. The system and process may also include the ability to detect an unsafe operating condition for the pneumatic positioner based on an input signal and modify the control signal in response to detecting the unsafe operating condition, to cause the converter to transition to a safe state. The system and process may additionally include the ability to allow the control circuitry to continue being powered by the input control signal while the converter is in the safe state.
Public/Granted literature
- US20070183901A1 Safety override circuit for pneumatic positioner and method of use thereof Public/Granted day:2007-08-09
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