Title: Interpolating digital data processing apparatus for correlation-type flow measurement

Abstract: Interpolating apparatus is provided for more accurately determining the peak position of a function, particularly a cross-correlation function derived from two related flow signals fed to an overloading counter correlation flowmeter, whereby the peak position is indicated by a set of signals corresponding to quantized values of a parameter and the apparatus interpolates the peak position from selected signals of the set. The preferred method of operation comprises computing for each of the signals an average of the quantized values of the parameter corresponding to that signal, and summing a predetermined number of these average values to obtain an indication of an interpolated value of the peak position. Various output circuits are provided for flowmeter applications to produce an output which is proportional to flow rate.

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Inventors: Jordan, James R. (Dunfermline, GB)

Application Number: 935794
Filing Date: 1978-08-22
Publication_date: 1981-03-03
Assignee: Sybron Corporation (Rochester, NY)
Primary Class(es): 702/46 377/21
Other Classes:
US Patent Ref:

Re28686	Jan, 1976	Coulthard	364/510.
3402606	Sep, 1968	Bruha	364/510.
3412240	Nov, 1968	Hunt et al.	364/723.
3777133	Dec, 1973	Beck et al.	364/510.
3810113	May, 1974	Jordan	364/728.
3840174	Oct, 1974	Craft	364/577.
3846625	Nov, 1974	Sasayama	364/723.
3862405	Jan, 1975	Beck	364/510.
4019038	Apr, 1977	Critten et al.	364/510.
4025775	May, 1977	Beauvais et al.	364/728.
4097801	Jun, 1978	Freeman et al.	364/728.

Other Refs:
Primary Examiner: Atkinson, Charles E.
Assistant Examiner: Chin, Gary
Attorney: Roessel; Theodore B., MacKenzie; Joseph C.