Boots – shoes – and leggings
Patent
1996-05-28
1998-04-07
Trammell, James P.
Boots, shoes, and leggings
364492, 324 7611, G01R 2106
Patent
active
057372314
ABSTRACT:
An improved metering unit is described which samples a power-related waveform and simultaneously captures its analog signal parameters for temperature and all phases of voltage and current, providing a more accurate and clearer waveform sample that effectively detects harmonics problems and does not require signal interpolation methods. The improved metering unit comprises signal conditioning circuitry interfacing with the power line for sensing temperature and all desired phases of voltage and current parameters of the waveform. The metering unit further comprises a processor having a timer output. The timer output controls track and hold circuitry and an A/D converter. The timer output places the track and hold circuitry in the hold mode to simultaneously capture temperature and all the desired phases of voltage and current of the waveform, and, at the same time, the timer output triggers the A/D converter to convert the captured analog signal parameters into digital sample values.
REFERENCES:
patent: 4227798 (1980-10-01), Steiner
patent: 4377833 (1983-03-01), Udren
patent: 4388611 (1983-06-01), Haferd
patent: 4556842 (1985-12-01), Rosswurm
patent: 4667152 (1987-05-01), Hayes et al.
patent: 4689752 (1987-08-01), Fernandes et al.
patent: 4855671 (1989-08-01), Fernandes
patent: 4979122 (1990-12-01), Davis et al.
patent: 5081454 (1992-01-01), Campbell, Jr. et al.
patent: 5164875 (1992-11-01), Haun et al.
patent: 5224054 (1993-06-01), Wallis
patent: 5233538 (1993-08-01), Wallis
patent: 5243537 (1993-09-01), Neumann
patent: 5247454 (1993-09-01), Farrington et al.
Robert A. Kennedy and Donald N. Rickey, Monitoring and Control of Industrial Power Systems, IEEE, pp. 42-46, Oct., 1989.
National Semiconductor, LM12458 12-Bit + Sing Data Acquisition System with Self-Calibration, pp. 1-28, Oct., 1991.
Square D Company, Power Monitoring and Control Systems, pp. 1-49, Jun. 5, 1990.
Carlson David C.
Pyle Michael W.
Golden Larry I.
Irfan Kareem M.
Kemper M.
Square D Company
Trammell James P.
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