CA2052600A1 - Adaptive bandwidth moving average filter - Google Patents

Adaptive bandwidth moving average filter

Info

Publication number
CA2052600A1
CA2052600A1 CA2052600A CA2052600A CA2052600A1 CA 2052600 A1 CA2052600 A1 CA 2052600A1 CA 2052600 A CA2052600 A CA 2052600A CA 2052600 A CA2052600 A CA 2052600A CA 2052600 A1 CA2052600 A1 CA 2052600A1
Authority
CA
Canada
Prior art keywords
value
filter
moving average
found
signal sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2052600A
Other languages
French (fr)
Other versions
CA2052600C (en
Inventor
Abdi Mohtashemi
Norman Gray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newport Electronics Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2052600A1 publication Critical patent/CA2052600A1/en
Application granted granted Critical
Publication of CA2052600C publication Critical patent/CA2052600C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/026—Averaging filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis

Abstract

A software filter is described which operates a computer to perform a moving average filter method.
The method comprises designating an initial filter constant to control the filter response time;
maintaining a moving average signal value; finding a difference value between the moving average signal value and each new signal sample amplitude before the new signal sample amplitude is included in the moving average signal value; updating the running average signal value by adding to it, at a time of each new signal sample, a value calculated by dividing the difference value found for a new signal sample by the initial filter constant; and when a sequential plurality of the found difference values manifest an identical polarity, dividing the initial filter constant by an integer factor to create a reduced filter constant which thereby reduces the filter response time. When, by contrast, a found difference value manifests a different polarity from an immediately preceding found difference value, the filter constant is multiplied by an integer factor to increase its value, not to exceed a maximum value, so as to increase the filter response time.
CA002052600A 1990-10-17 1991-10-01 Adaptive bandwidth moving average filter Expired - Lifetime CA2052600C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59908790A 1990-10-17 1990-10-17
US07/599,087 1990-10-17

Publications (2)

Publication Number Publication Date
CA2052600A1 true CA2052600A1 (en) 1992-04-18
CA2052600C CA2052600C (en) 1995-09-19

Family

ID=24398158

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002052600A Expired - Lifetime CA2052600C (en) 1990-10-17 1991-10-01 Adaptive bandwidth moving average filter

Country Status (6)

Country Link
CA (1) CA2052600C (en)
DE (1) DE4134398C2 (en)
ES (1) ES2048066B1 (en)
FR (1) FR2668319B1 (en)
GB (1) GB2248954B (en)
IT (1) IT1250938B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339335A (en) * 1992-12-15 1994-08-16 Elsag International B.V. Method and apparatus for digitally processing and filtering signals in industrial control applications
US5394744A (en) * 1994-01-05 1995-03-07 Ford Motor Company Fault detection using averaging filter with variable response time
KR101716481B1 (en) * 2016-01-19 2017-03-14 엘에스산전 주식회사 Method for controlling operation of moving average filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1290865A (en) * 1969-09-24 1972-09-27
DE2734978A1 (en) * 1977-08-03 1979-02-22 Basf Ag WINDING SHAFT FOR WINDING SEVERAL TAPES AT THE SAME TIME
JPS56169923A (en) * 1980-06-03 1981-12-26 Mitsubishi Electric Corp Digital low-pass filter device
GB8418504D0 (en) * 1984-07-20 1984-08-22 Fiamass Ltd Functional analysis

Also Published As

Publication number Publication date
DE4134398A1 (en) 1992-04-23
GB2248954B (en) 1994-08-24
FR2668319A1 (en) 1992-04-24
CA2052600C (en) 1995-09-19
DE4134398C2 (en) 1996-02-15
GB2248954A (en) 1992-04-22
ES2048066B1 (en) 1996-07-01
GB9120778D0 (en) 1991-11-13
ITRM910786A0 (en) 1991-10-16
ES2048066R (en) 1995-11-16
ES2048066A2 (en) 1994-03-01
IT1250938B (en) 1995-04-22
FR2668319B1 (en) 1994-01-28
ITRM910786A1 (en) 1993-04-16

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