Linear shaped filter

Details Linear shaped filter Linear shaped filter

G - Physics

01

N

358/3, 358/7

G01N 23/12 (2006.01) G01N 9/24 (2006.01) G01V 5/12 (2006.01)

Patent

CA 2018059

ABSTRACT A filter for use with a signal which varies about a mean such as in a radioactive densometer, is provided and includes a microprocessor and timing clock for sampling the random variable over a specific time interval. The microprocessor utilizes a weighting factor which is used to determine a percentage of an average frequency of an initial sample of random signals or mean. Further, the microprocessor determines a percentage of an average frequency of a subsequent sample of random signals. Once deter- mined, the two percentages are added together yielding a new fre- quency which the microprocessor then uses to decide if an actual change in state has occurred.

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