Source: http://www.google.com/patents/US7010459?dq=6,125,447
Timestamp: 2017-06-29 10:14:03
Document Index: 605256215

Matched Legal Cases: ['art 2', 'art 3', 'art 3', 'art 2', 'art 2', 'art 4', 'art 4']

Patent US7010459 - Process device diagnostics using process variable sensor signal - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA diagnostic device for use in a process control system receives a sensor signal related to a process variable of a process sensed by a process variable sensor. A signal preprocessor provides a sensor power signal output as a function of a frequency distribution of power in the sensor signal. A process...http://www.google.com/patents/US7010459?utm_source=gb-gplus-sharePatent US7010459 - Process device diagnostics using process variable sensor signalAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7010459 B2Publication typeGrantApplication numberUS 10/455,815Publication dateMar 7, 2006Filing dateJun 5, 2003Priority dateJun 25, 1999Fee statusPaidAlso published asCN1799013A, CN100456190C, DE602004008910D1, DE602004008910T2, EP1629333A1, EP1629333B1, US20040024568, WO2004109416A1Publication number10455815, 455815, US 7010459 B2, US 7010459B2, US-B2-7010459, US7010459 B2, US7010459B2InventorsEvren Eryurek, Kadir Kavaklioglu, Steven R. EsboldtOriginal AssigneeRosemount Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (112), Non-Patent Citations (99), Referenced by (41), Classifications (33), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetProcess device diagnostics using process variable sensor signal
In FIG. 1, a typical environment for a diagnostic device in accordance with one embodiment of the invention is illustrated at 100. In FIG. 1, a diagnostic device, such as process transmitter 102 configured as a pressure transmitter, is shown connected to control system 104. Process transmitters can be configured to monitor one or more process variables associated with fluids in a process plant such as slurries, liquids, vapors and gasses in chemical, pulp, petroleum, gas, pharmaceutical, food and other fluid processing plants. The monitored process variables can be pressure, flow, level, temperature or other properties of fluids. A vibration sensitive process variable sensor is one that can sense vibrations carried in the process fluid, such as a pressure sensor, a sensor in a coriolis flow meter, electrodes in a magnetic flow meter, a sensor in a vortex or ultrasonic flowmeter or others. Process transmitters include one or more sensors that can be either internal to the transmitter or external to the transmitter, depending on the installation needs at the process plant. Process transmitters generate one or more transmitter outputs that represent a sensed process variable or can also monitor the process using data received from remote sensors. Transmitter outputs are configured for transmission over long distance to a controller or indicator via communication bus 106. In typical fluid processing plants, communication bus 106 can be a 4–20 mA current loop that powers the transmitter, or a fieldbus connection, a HART® protocol communication or a fiberoptic connection to a controller, a control system or an output device. In transmitters powered by a two wire loop, power must be kept low to provide intrinsic safety in explosive atmospheres. Other types of communication busses can also be used such as either net operating with other protocols such as tcp/ip.
The continuous wavelet transformation described above requires extensive computations. Therefore, in one embodiment, signal preprocessor 150 performs a discrete wavelet transform (DWT) which is well suited for implementation in microprocessor system 148. One efficient discrete wavelet transform uses the Mallat algorithm which is a two channel sub-band coder. The Mallet algorithm provides a series of separated or decomposed signals which are representative of individual frequency components of the original signal. FIG. 4 shows an example of such a system in which an original sensor signal S is decomposed using a sub-band coder of a Mallet algorithm. The signal S has a frequency range from 0 to a maximum of fMAX. The signal is passed simultaneously through a first high pass filter having a frequency range from ½ fmax to fmax, and a low pass filter having a frequency range from 0 to ½ fMAX. This process is called decomposition. The output from the high pass filter provides “level 1” discrete wavelet transform coefficients. The level 1 coefficients represent the amplitude as a function of time of that portion of the input signal which is between ½ fmax and fMAX. The output from the 0–½ fmax low pass filter is passed through subsequent high pass (¼ fmax–½ fmax) and low pass (0–¼ fmax) filters, as desired, to provide additional levels (beyond “level 1”) of discrete wavelet transform coefficients. The outputs from each low pass filter can be subjected to further decompositions offering additional levels of discrete wavelet transformation coefficients as desired. This process continues until the desired resolution is achieved or the number of remaining data samples after a decomposition yields no additional information. The resolution of the wavelet transform is chosen to be approximately the same as the sensor or the same as the minimum signal resolution required to monitor the vibration noise signal 132. Each level of DWT coefficients is representative of signal amplitude as a function of time for a given frequency range. Coefficients for each frequency range are concatenated to form a graph such as that shown in FIG. 3.
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Inc.Reducing False Alarms with Multi-modal Sensing for Pipeline Blockage* Cited by examinerClassifications U.S. Classification702/182, 700/174International ClassificationG01F1/60, G01F25/00, G01K15/00, G01F1/84, G08C19/02, G07C3/00, G01F1/32, G05B9/03, G01D21/02, G05B23/02, G06F11/30Cooperative ClassificationG08C19/02, G07C3/00, G05B23/024, G05B9/03, G01K15/00, G01F25/0007, G01F1/8477, G01F1/60, G01F1/3209, G05B23/0221European ClassificationG01F25/00A, G07C3/00, G05B9/03, G08C19/02, G01K15/00, G01F1/32A, G01F1/60, G01F1/84F8C2, G05B23/02S4H4, G05B23/02S4DLegal EventsDateCodeEventDescriptionSep 15, 2003ASAssignmentOwner name: ROSEMOUNT INC., MINNESOTAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ERYUREK, EVREN;KAVAKLIOGLU, KADIR;ESBOLDT, STEVEN R.;REEL/FRAME:014504/0792;SIGNING DATES FROM 20030909 TO 20030910Aug 10, 2009FPAYFee paymentYear of fee payment: 4Mar 12, 2013FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services