Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1982-08-09
1985-05-28
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307356, 328162, 382 50, H03K 5153
Patent
active
045202800
ABSTRACT:
An input signal containing a base line which fluctuates to a great extent is detected or restored by comparing the input signal with reference levels which are shifted in accordance with the fluctuation of base line. The input signal is sampled at a variable sampling rate and an average of sampled values for a predetermined period is derived to produce a profile signal which resembles accurately the fluctuation of the base line. The profile signal thus obtained is added to upper and lower threshold voltages to produce the reference levels which have been corrected in accordance with the fluctuation of the base line of input signal.
REFERENCES:
patent: 3472958 (1969-10-01), Estock
patent: 3504289 (1970-03-01), Pfeiffer et al.
patent: 4132977 (1979-01-01), Nagano
Kato Kiichi
Kodama Hiroshi
Ohsima Ken
Sakamoto Masaharu
Yamamiya Kunio
Olympus Optical Company Limited
Zazworsky John
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