Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2001-08-15
2004-06-01
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S057000
Reexamination Certificate
active
06745138
ABSTRACT:
BACKGROUND
The present invention generally relates to Intelligent Electronic Devices (“IED's”) and more specifically, to the design and manufacture of a digital power meter. A typical digital power meter is described in U.S. Pat. No. 6,185,508.
One aspect of modern digital power meters is that many of them contain Flash EEPROM memory for storing their firmware, e.g. operating software. This allows the customer to upgrade the firmware in their device. Reasons for upgrading the firmware include adding new features, or correcting defects in the firmware code.
A number of methods for upgrading the firmware within the flash memory of IED's are known in the art. Typically they involve a CPU in a computer sending packets containing the update code to the IED over a communications channel. An example of this method of firmware updating is described in the document entitled “Meter Shop User's Guide”, published by Power Measurement Ltd., located in Saanichton, B.C., Canada.
The upgrade of the IED's firmware is normally initiated by the remote CPU (in a computer or other device). Therefore, the IED is not normally involved in the decision as to whether to upgrade its firmware or not. This means that the IED cannot prevent an undesirable upgrades to its code, e.g., if it is in the middle of a critical control operation, or if the new code is not compatible with the IED for some reason. In addition, there must be some intelligence in the remote CPU in order to execute the upgrade and/or provide an interface to the user that is initiating the upgrade. The user must also have intimate knowledge about the new code to ensure it is compatible with the IED.
Another key aspect of IED's is expandability. It is quite common for a user to want to add additional functionality to the device once it has been installed. Typically this will be additional functionality that requires a code change as described above or a change that requires additional hardware. If the change requires additional hardware, the device must often be replaced or at least removed from its installation to add the new hardware component.
Yet another key aspect of IED's is cost. There are many aspects of cost, but two key aspects are initial cost of a basic device and the cost to upgrade a device. Typical IED's contain complex processor, memory, analog to digital conversion, analog, digital and display circuitry which in many cases is either limited in functionality or formed out of many individual components. In addition, the purchaser of an IED must decide at the time of purchase the amount of functionality they want to have in their IED. An IED with a large amount of functionality will typically cost many times that of one with a limited amount of functionality.
Due to the desire to reduce the cost of the IED, it is common to use components which have reduced capabilities in terms of performance, accuracy, etc. This can lead to a final device which also has reduced performance, accuracy, etc.
REFERENCES:
patent: 4225839 (1980-09-01), Martincic
patent: 4900275 (1990-02-01), Fasano
patent: 4957876 (1990-09-01), Shibata et al.
patent: 5056214 (1991-10-01), Holt
patent: 5192227 (1993-03-01), Bales
patent: 5248967 (1993-09-01), Daneshfar
patent: 5301122 (1994-04-01), Halpern
patent: 5418752 (1995-05-01), Harari et al.
patent: 5418837 (1995-05-01), Johansson et al.
patent: 5544312 (1996-08-01), Hasbun et al.
patent: 5548527 (1996-08-01), Hemminger et al.
patent: 5555508 (1996-09-01), Munday et al.
patent: 5602363 (1997-02-01), Von Arx
patent: 5654081 (1997-08-01), Todd
patent: 5704805 (1998-01-01), Douty et al.
patent: 5736847 (1998-04-01), Van Doorn et al.
patent: 5880927 (1999-03-01), Kent et al.
patent: 5896393 (1999-04-01), Yard et al.
patent: 5907476 (1999-05-01), Davidsz
patent: 5936971 (1999-08-01), Harari et al.
patent: 5994892 (1999-11-01), Turino et al.
patent: 6059129 (2000-05-01), Bechaz et al.
patent: 6064192 (2000-05-01), Redmyer
patent: 6185508 (2001-02-01), Van Doorn et al.
patent: 6212278 (2001-04-01), Bacon et al.
patent: 6219656 (2001-04-01), Cain et al.
patent: 6262672 (2001-07-01), Brooksby et al.
patent: 6275168 (2001-08-01), Slater et al.
patent: 6301527 (2001-10-01), Butland et al.
patent: 6367023 (2002-04-01), Kling et al.
patent: 6401054 (2002-06-01), Andersen
patent: 6459175 (2002-10-01), Potega
patent: 6459997 (2002-10-01), Andersen
patent: 6486652 (2002-11-01), Ouellette et al.
patent: 6493644 (2002-12-01), Jonker et al.
patent: 6496342 (2002-12-01), Horvath et al.
patent: WO 01/01079 (2001-01-01), None
patent: WO 01/01154 (2001-01-01), None
patent: WO 01/01155 (2001-01-01), None
patent: WO 01/01156 (2001-01-01), None
patent: WO 01/01157 (2001-01-01), None
patent: WO 01/01159 (2001-01-01), None
patent: WO 01/01160 (2001-01-01), None
patent: WO 01/55733 (2001-08-01), None
DSP56F801/803/805/807 16-Bit Digital Signal Processor User's Manual Preliminary—Rev. 3.0, ©Motorola, Inc, 2001, 782 pages.
1991, Robert Bosch, “CAN Specification Version 2.0”, 68 pages.
A. Lakshmikanth and Medhar M. Morcos, Article “A Power Quality Monitoring System: A Case Study in DSP-Based Solutions for Power Electronics,” IEEE Transactions on Instrumentation and Measurement vol. 50, No. 3 Jun. 2001, 8 pages.
Niall Murphy article, Internet Appliance Design “Forget Me Not”, Embedded Systems Programming Jun. 2001, 4 pages.
ION© Technology, Meter Shop User's Guide, ©Power Measurement Ltd., Revision Date May 10, 2001, 48 pages.
6200 ION, Installation & Basic Setup Instructions, ©Power Measurement Ltd., Revision Date Apr. 25, 2001, 50 pages.
Huber Benedikt T.
Lightbody Simon H.
Przydatek Piotr B.
Brinks Hofer Gilson & Lione
Charioui Mohamed
Hoff Marc S.
Power Measurement Ltd.
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