Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1995-09-01
1998-04-07
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
With particular system function
340501, 340518, 34082506, G08B 2900
Patent
active
057369283
ABSTRACT:
An apparatus and a method can be used to pre-process an output signal from an ambient condition sensor. The preprocessing removes noise pulses which are not correlated with an ambient condition being sensed. Preprocessing can be carried out by comparing the present output value to a prior output value and selecting a minimum value there between. The apparatus and method can incorporate storage for two prior values and the present output value can be compared to two prior values and a minimum or a maximum of the three values selected. Additional processing can be carried out by comparing the present output value to a nominal expected clear air output value. If the present value exceeds the nominal expected output value, a minimum is selected among the present output value and one or more prior values. If the present output value is less than the nominally expected value, a maximum is selected from among the present output value and one or more prior output values.
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I.E.E.E. Transactions on Instrumentation & Measurement--vol. IM-36, No. 3, Sep. 1987, NY, USA, p. 851--Rathore et al. "Digital Maximum/Minimum Indicator".
Kuzhiyil Frank
Tice Lee D.
Hofsass Jeffery
Pittway Corporation
Pope Daryl C.
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