ZA782493B - Rate of change detection - Google Patents

Rate of change detection

Info

Publication number
ZA782493B
ZA782493B ZA00782493A ZA782493A ZA782493B ZA 782493 B ZA782493 B ZA 782493B ZA 00782493 A ZA00782493 A ZA 00782493A ZA 782493 A ZA782493 A ZA 782493A ZA 782493 B ZA782493 B ZA 782493B
Authority
ZA
South Africa
Prior art keywords
rate
change detection
detection
change
Prior art date
Application number
ZA00782493A
Other languages
English (en)
Inventor
Wyk J Van
J Van Wyk
B Bout
Original Assignee
Anglo Amer Corp South Africa
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 Anglo Amer Corp South Africa filed Critical Anglo Amer Corp South Africa
Priority to ZA00782493A priority Critical patent/ZA782493B/xx
Priority to NL7903362A priority patent/NL7903362A/xx
Priority to FR7910832A priority patent/FR2425076A1/fr
Priority to NO79791419A priority patent/NO151514C/no
Priority to SE7903750A priority patent/SE439851B/sv
Priority to IT22288/79A priority patent/IT1112775B/it
Priority to DK177479A priority patent/DK156780C/da
Priority to GB7914956A priority patent/GB2020042B/en
Priority to LU81203A priority patent/LU81203A1/xx
Priority to US06/034,809 priority patent/US4309663A/en
Priority to CH4046/79A priority patent/CH648129A5/de
Priority to AU46522/79A priority patent/AU524975B2/en
Priority to DE19792917454 priority patent/DE2917454A1/de
Priority to BE2/57768A priority patent/BE875952A/xx
Priority to CA000326638A priority patent/CA1140219A/en
Priority to JP5396379A priority patent/JPS5530794A/ja
Priority to IN444/CAL/79A priority patent/IN152221B/en
Priority to BR7902684A priority patent/BR7902684A/pt
Priority to IE1213/79A priority patent/IE48296B1/en
Publication of ZA782493B publication Critical patent/ZA782493B/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Manipulation Of Pulses (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Emergency Alarm Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Radar Systems Or Details Thereof (AREA)
ZA00782493A 1978-05-01 1978-05-01 Rate of change detection ZA782493B (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
ZA00782493A ZA782493B (en) 1978-05-01 1978-05-01 Rate of change detection
NL7903362A NL7903362A (nl) 1978-05-01 1979-04-27 Werkwijze en inrichting voor het detecteren van de wijzigingssnelheid van een signaal.
FR7910832A FR2425076A1 (fr) 1978-05-01 1979-04-27 Procede et appareil pour la detection de la vitesse de variation d'un signal electrique
NO79791419A NO151514C (no) 1978-05-01 1979-04-27 Fremgangsmaate og innretning for overvaakning av endringshastigheten av et signal
SE7903750A SE439851B (sv) 1978-05-01 1979-04-27 Forfarande och anordning for avkenning av frekvensendringar
IT22288/79A IT1112775B (it) 1978-05-01 1979-04-30 Metodo ed apparato per la rivelazione del grado di variazione di un segnale
DK177479A DK156780C (da) 1978-05-01 1979-04-30 Fremgangsmaade til overvaagning af et signals aendringshastighed samt apparat til udoevelse af fremgangsmaaden
GB7914956A GB2020042B (en) 1978-05-01 1979-04-30 Monitoring rate of change of an electrical signal
LU81203A LU81203A1 (fr) 1978-05-01 1979-04-30 Systeme de detection de la vitesse de changement d'un signal
US06/034,809 US4309663A (en) 1978-05-01 1979-04-30 Rate of change detection
CH4046/79A CH648129A5 (de) 1978-05-01 1979-04-30 Verfahren und vorrichtung zum ueberwachen der aenderung eines signals.
AU46522/79A AU524975B2 (en) 1978-05-01 1979-04-30 Rate of change detection
DE19792917454 DE2917454A1 (de) 1978-05-01 1979-04-30 Verfahren und vorrichtung zum ueberwachen der aenderungsgroesse eines signals
BE2/57768A BE875952A (nl) 1978-05-01 1979-04-30 Werkwijze en inrichting voor het kontroleren van de snelheid van de verandering van een signaal
CA000326638A CA1140219A (en) 1978-05-01 1979-04-30 Rate of change detection
JP5396379A JPS5530794A (en) 1978-05-01 1979-05-01 Method and apparatus for detecting ratio of signal variation
IN444/CAL/79A IN152221B (it) 1978-05-01 1979-05-02
BR7902684A BR7902684A (pt) 1978-05-01 1979-05-02 Processo e aparelho para supervisionar o regime de variacao de um primeiro sinal
IE1213/79A IE48296B1 (en) 1978-05-01 1979-08-18 Fire detectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA00782493A ZA782493B (en) 1978-05-01 1978-05-01 Rate of change detection

Publications (1)

Publication Number Publication Date
ZA782493B true ZA782493B (en) 1979-12-27

Family

ID=25572893

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00782493A ZA782493B (en) 1978-05-01 1978-05-01 Rate of change detection

Country Status (19)

Country Link
US (1) US4309663A (it)
JP (1) JPS5530794A (it)
AU (1) AU524975B2 (it)
BE (1) BE875952A (it)
BR (1) BR7902684A (it)
CA (1) CA1140219A (it)
CH (1) CH648129A5 (it)
DE (1) DE2917454A1 (it)
DK (1) DK156780C (it)
FR (1) FR2425076A1 (it)
GB (1) GB2020042B (it)
IE (1) IE48296B1 (it)
IN (1) IN152221B (it)
IT (1) IT1112775B (it)
LU (1) LU81203A1 (it)
NL (1) NL7903362A (it)
NO (1) NO151514C (it)
SE (1) SE439851B (it)
ZA (1) ZA782493B (it)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA785255B (en) * 1978-09-15 1979-12-27 Anglo Amer Corp South Africa Alarm system
EP0021554B1 (en) * 1979-03-14 1983-06-22 LUCAS INDUSTRIES public limited company Method and device for measurement of the rate of change of frequency of a pulse train
JPS57795A (en) * 1980-06-04 1982-01-05 Hitachi Ltd Method of detecting and warning gas leakage
JPS5726227A (en) * 1980-07-22 1982-02-12 Nippon Denso Co Ltd Abnormal alarm device
GB2085599B (en) * 1980-09-30 1984-09-19 Gould Advance Ltd Automatic drift correction
DE3111684A1 (de) * 1981-03-25 1982-10-14 FHN-Verbindungstechnik GmbH, 8501 Eckental "elektronische steuerschaltung fuer den antriebsmotor eines versenkbaren autofensters"
US4582672A (en) * 1982-08-11 1986-04-15 Westinghouse Electric Corp. Method and apparatus for preventing inadvertent criticality in a nuclear fueled electric powering generating unit
JPS59172093A (ja) * 1983-03-21 1984-09-28 高橋　信夫 火災などの異常警報装置
JPS60135000A (ja) * 1983-12-23 1985-07-18 ホーチキ株式会社 火災報知装置
JPS60134999A (ja) * 1983-12-23 1985-07-18 ホーチキ株式会社 火災報知装置
JPS6219999A (ja) * 1985-07-18 1987-01-28 ホーチキ株式会社 火災報知装置
DE4116308A1 (de) * 1991-05-15 1992-11-19 Schleicher Relais Vorrichtung zur intermittierenden messung einer messgroesse ueber laengere zeitraeume
US5461223A (en) * 1992-10-09 1995-10-24 Eastman Kodak Company Bar code detecting circuitry
DE102005058574B4 (de) * 2005-12-08 2016-03-24 Hella Kgaa Hueck & Co. Vorrichtung zum Steuern der Zusatzleistung einer Gasentladungslampe mit einem Oszillator, dessen Frequenz zum Ersetzen eines RC-Zeitgliedes geändert wird

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132947A (en) * 1967-09-06 1979-01-02 General Electric Company Waveshape detector
US3600688A (en) * 1970-04-21 1971-08-17 Bethlehem Steel Corp Signal discriminator circuit
US3711779A (en) * 1970-11-17 1973-01-16 Instrumentation Specialties Co Apparatus for determining and characterizing the slopes of time-varying signals
JPS5115886B2 (it) * 1972-05-18 1976-05-20
AU478432B2 (en) * 1972-12-01 1975-05-15 Wormald International Ltd. Improvements in temperature monitoring equipment
FR2231972B1 (it) * 1973-05-29 1977-04-29 Electricite De France
DE2440309A1 (de) * 1973-08-24 1975-03-27 Anglo Amer Corp South Africa Verfahren und vorrichtung zum aufspueren von braenden
AU481144B2 (en) * 1973-10-04 1977-02-21 Dulux Australia Ltd. POLYMER BEAD PROCESS Specification
US3958132A (en) * 1974-04-25 1976-05-18 Sun Oil Company Of Pennsylvania Slope change detector
DE2435084C3 (de) * 1974-07-22 1978-12-07 Fa. Carl Zeiss, 7920 Heidenheim Anordnung zur zeitlichen Verfolgung eines Meßvorganges
DE2453013C2 (de) * 1974-11-08 1984-09-20 Hellige Gmbh, 7800 Freiburg Medizinisches Gerät zur automatischen Überwachung der Temperatur des menschlichen Körpers
GB1527600A (en) * 1974-12-13 1978-10-04 Mullard Ltd Video signal analysis
JPS5230088A (en) * 1975-08-30 1977-03-07 Green Cross Corp Device for detecting abnormal position of skin impedance
GB1478810A (en) * 1975-11-20 1977-07-06 Standard Telephones Cables Ltd Detection circuits for monitoring current changes
US4041404A (en) * 1976-06-01 1977-08-09 Leeds & Northrup Company Apparatus and method for detecting when a measured variable represented by a string of digital pulses reaches a plateau
US4086651A (en) * 1976-06-29 1978-04-25 The Perkin-Elmer Corporation Electrical output peak detecting apparatus
FR2397640A1 (fr) * 1977-07-12 1979-02-09 Thomson Csf Dispositif de mesure de la pente moyenne d'une courbe representative d'un phenomene en evolution

Also Published As

Publication number Publication date
DE2917454A1 (de) 1979-11-08
SE7903750L (sv) 1979-11-02
NL7903362A (nl) 1979-11-05
IE791213L (en) 1979-11-01
JPS5530794A (en) 1980-03-04
BR7902684A (pt) 1979-11-27
FR2425076A1 (fr) 1979-11-30
NO151514B (no) 1985-01-07
LU81203A1 (fr) 1979-09-10
BE875952A (nl) 1979-08-16
AU4652279A (en) 1979-11-08
DK156780C (da) 1990-02-19
CA1140219A (en) 1983-01-25
IN152221B (it) 1983-11-19
SE439851B (sv) 1985-07-01
IE48296B1 (en) 1984-11-28
NO151514C (no) 1985-04-24
AU524975B2 (en) 1982-10-14
IT7922288A0 (it) 1979-04-30
DK177479A (da) 1979-11-02
IT1112775B (it) 1986-01-20
CH648129A5 (de) 1985-02-28
DK156780B (da) 1989-10-02
US4309663A (en) 1982-01-05
GB2020042B (en) 1982-09-02
NO791419L (no) 1979-11-02
GB2020042A (en) 1979-11-07
FR2425076B1 (it) 1984-10-05

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