EP0825573B1 - Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements - Google Patents

Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements Download PDF

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Publication number
EP0825573B1
EP0825573B1 EP96113304A EP96113304A EP0825573B1 EP 0825573 B1 EP0825573 B1 EP 0825573B1 EP 96113304 A EP96113304 A EP 96113304A EP 96113304 A EP96113304 A EP 96113304A EP 0825573 B1 EP0825573 B1 EP 0825573B1
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EP
European Patent Office
Prior art keywords
signal
steepness
accordance
movement detector
evaluation device
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.)
Expired - Lifetime
Application number
EP96113304A
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German (de)
English (en)
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EP0825573B2 (fr
EP0825573A1 (fr
Inventor
Siegmar Dipl.-Ing. Zirkl
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Siemens AG
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Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Priority to EP19960113304 priority Critical patent/EP0825573B2/fr
Priority to DE59608506T priority patent/DE59608506D1/de
Publication of EP0825573A1 publication Critical patent/EP0825573A1/fr
Publication of EP0825573B1 publication Critical patent/EP0825573B1/fr
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems

Definitions

  • the invention relates to a method for evaluation a signal from a motion detector. It continues to refer on an evaluation device for performing the method.
  • a passive infrared motion detector is used here in particular as a motion detector or PIR motion detector understood.
  • a PIR motion detector is usually used in hazard detection technology and in control technology to record moving objects used indoors or outdoors. There becomes from a human body or from another Infrared radiation emitted by the heat source is bundled by optics and fed to a PIR sensor.
  • a PIR motion detector is therefore more dynamic for the acquisition and evaluation Designed changes. Even the smallest can be in its measuring range Changes in the beam flow or changes in temperature over time between the ambient temperature and the respective Surface temperature of the object can be detected.
  • Document DE 4005 169 describes a PIR motion detector with a Signal processing facility.
  • the invention is therefore based on the object of a method and a device for improved evaluation of a signal specify a motion detector, so that a special high immunity to interference and particularly high stability, especially against drafts.
  • This task is carried out in a method of the type mentioned at the beginning Kind solved according to the invention by the slope or slope the waveform generated due to a detected change is evaluated.
  • the invention is based on the consideration that on the one hand Movements as well as disturbances and undesirable influences lead to different changes in the monitoring area, and that on the other hand these different changes signal curves or signal curves that differ from one another different curve steepness or gradients to have. So - e.g. due to the thermal inertia - the steepness of one triggered by a draft Output signal relatively low, so that a draft is a relative small steepness or slope can be assigned. In contrast can an electrical interference coupling, for example a burst or an electrostatic contact discharge (ESD) with very high slope, relatively large Slopes are assigned.
  • ESD electrostatic contact discharge
  • Typical movements are therefore appropriately independent whether rising or falling - a certain predeterminable Area assigned to the slope of the curve. Although none fixed trigger limits are then set outside there is no triggering in this area.
  • a first criterion a deviation of the instantaneous value during signal evaluation the steepness of the signal from a steepness limit detected.
  • a further criterion is expediently a Exceeding a minimum stroke of the signal from the current one Voltage swing detected. Only when both criteria are met the change currently detected by the motion detector as valid Interpreted movement.
  • the instantaneous value of the slope is expediently used of the signal compared to a first upper limit, e.g. B. for evaluation as a draft. Is the absolute instantaneous value the slope is greater than this first upper limit, so the maximum value of the slope is first determined. This maximum value is then expediently included compared to a second lower limit, e.g. B. for the Evaluation as an electrical fault.
  • a first upper limit e.g. B. for evaluation as a draft.
  • the maximum value of the slope is first determined.
  • This maximum value is then expediently included compared to a second lower limit, e.g. B. for the Evaluation as an electrical fault.
  • the steepness advantageously becomes the temporal one Course of the signal with regard to a change of sign Steepness or slope, i.e. in terms of achieving one Minimum or maximum on the signal curve, checked.
  • the advantages achieved with the invention are in particular in that only through constant monitoring of the Slope of the voltage or due to detected changes Signal curves as a criterion for signal evaluation a particularly high EMC immunity to electrical or electrostatic disturbances and a particularly high stability against drafts or the like at the same time especially high overall sensitivity for movements to be recorded is achieved.
  • a corresponding PIR motion detector is therefore particularly suitable for use in a so-called European-Installation-Bus (instabus-EIB) suitable.
  • the present method and the present evaluation device enable an improvement in EMC immunity against burst according to standard IEC801 part 4 and against electrostatic Contact discharges (ESD) according to standard IEC801 part 2.
  • a motion detector 1 schematically shows an area monitored by a motion detector 1, for example a PIR motion detector.
  • the monitoring area or the measuring zone 2 is, for example, conical.
  • An infrared radiation detected within the monitoring area 2 is bundled onto a sensor 4 of the motion detector 1 via a ballast or radiation optics 3.
  • Each change in the radiation incidence causes a change in its output voltage U s at the sensor 4, which is further processed and evaluated in an evaluation device 5 of the motion detector 1.
  • the evaluation device 5 comprises a preferably narrow-band signal amplifier 6 and a computer unit 7 in the form of a microprocessor.
  • the output voltage U s amplified by the signal amplifier 6 is present as a voltage or output signal U A at a signal input E n .
  • the computer unit 7 has a number of signal outputs A 1 , A 2 , A n to which display elements 8, 9 and 10 are connected.
  • FIG. 2 shows a section of a curve of a signal U A present at the signal input E n of the computer unit 7 in a U / t diagram.
  • the signal U A in the computer unit 7 is evaluated essentially with regard to the slope or slope S of the amplified voltage profile of the signal U A.
  • This variable voltage swing U h of the signal U A is determined by specifying a smallest voltage swing, which leads to an evaluation as a movement, in the form of a preset constant U hm , with: U H ⁇ U Hm ,
  • is the absolute value of the current slope S, and where S L is a default constant, namely an upper limit of the slope S, e.g. B. for evaluation as a draft.
  • the slope S is read in and compared with the preset constant S L , a time interval ⁇ t for measuring the slope S being preset.
  • the initial value U 0 of the voltage is saved. Is the absolute value
  • the voltage swing U h is greater than the predetermined voltage swing U hm , the voltage swing U h is therefore sufficient, the change detected by the sensor 4 of the motion detector 1 is interpreted as a valid movement. As a result, a corresponding output signal A 1 is generated by the computer unit 7, so that the display element 8 responds and triggers a display.
  • the maximum slope S M is greater than the default constant S B , this is interpreted as an electrical disturbance (burst). After a pause for bridging and swinging out, the whole process is repeated. Also, in the event that the sign V S of the slope S does not reverse, the process of searching for the inflection of the curve is repeated until a sign change occurs - regardless of a change from "+" to "-" or vice versa is. In other words, the process of searching for the inflection of the curve is repeated until the maximum or minimum on the curve has been reached and found.
  • Time / voltage curves of the signal U A caused by disturbances at the output of the amplifier 6 are shown in FIG. 5.
  • the section C represents a typical draft, the relationship S L >
  • Section D represents a burst, where the relationship
  • a circuit according to 1 constructed, with the amplifier 6 being a narrowband amplifier with approx. 0.1 to 10 Hz and a gain factor of 10,000 and as a computer unit 7 a microprocessor from Type 68HC805B6 were used.
  • the microprocessor was in Assembler programmed according to the structogram according to FIG 3.
  • an internal watchdog was activated, by responding to the display 10 for "watch-dog was active "signaled activity a disturbance of the Microprocessor displays.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Claims (12)

  1. Procédé d'analyse d'un signal d'un détecteur (1) de mouvement, notamment d'un détecteur de mouvement infrarouge passif, une variation détectée étant analysée à l'aide de la pente (S) de la courbe (UA (t)) de signal produite.
  2. Procédé suivant la revendication 1, une zone de la pente (S) étant associée à un déroulement de mouvement.
  3. Procédé suivant la revendication 1 ou 2, une excursion (Un) de tension à l'intérieur de laquelle se trouve la pente (S) du signal (UA) étant associée au signal (UA).
  4. Procédé suivant l'une des revendications 1 à 3, dans lequel on détecte comme premier critère un écart de la valeur |S| instantanée de la pente du signal par rapport à une valeur (SL, SB) limite de la pente et dans lequel on détecte comme deuxième critère un dépassement d'une excursion (Uhm) minimale du signal (UA) par rapport à l'excursion (Uh) de tension instantanée, la variation détectée de manière instantanée étant enregistrée comme mouvement valable lorsque les deux critères sont satisfaits.
  5. Procédé suivant la revendication 4, la valeur |S| instantanée de la pente (S) du signal (UA) étant comparée à une première valeur (SL) limite supérieure, et la valeur (SM) maximale de la pente (S) du signal (UA) étant comparée à une deuxième valeur (SB) limite inférieure.
  6. Procédé suivant la revendication 5, la variation en fonction du temps du signal (UA (t)) étant, pour déterminer la valeur (SM) maximale de la pente (S), inspectée pour rechercher une inversion (VS) de signe de la pente (S).
  7. Dispositif d'analyse pour un signal (US, UA) produit par un capteur (4) d'un détecteur (1) de mouvement, comportant une unité (7) d'ordinateur ayant une entrée (En) de signal et ayant au moins une sortie (An) de signal, un signal de sortie caractérisant une variation détectée par le capteur (4) étant produit à l'aide de la pente (S) déterminée du signal (UA) d'entrée.
  8. Dispositif d'analyse suivant la revendication 7, comportant un amplificateur (6) de signal monté en amont de l'unité (7) d'ordinateur.
  9. Dispositif d'analyse suivant la revendication 7 ou 8, comportant au moins un élément (8, 9, 10) d'affichage monté en aval de l'unité (7) d'ordinateur.
  10. Dispositif d'analyse suivant l'une des revendications 7 à 9, dans lequel un microprocesseur est prévu comme unité (7) d'ordinateur.
  11. Détecteur de mouvement, notamment capteur de mouvement passif à infrarouge, comportant un dispositif (5) d'exploitation suivant l'une des revendications 7 à 10.
  12. Détecteur de mouvement suivant la revendication 11, dont le détecteur (4) est conçu pour produire un signal (US) de tension à partir d'un rayonnement infrarouge.
EP19960113304 1996-08-19 1996-08-19 Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements Expired - Lifetime EP0825573B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19960113304 EP0825573B2 (fr) 1996-08-19 1996-08-19 Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements
DE59608506T DE59608506D1 (de) 1996-08-19 1996-08-19 Verfahren und Vorrichtung zur Auswertung eines Signals eines Bewegungsmelders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19960113304 EP0825573B2 (fr) 1996-08-19 1996-08-19 Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements

Publications (3)

Publication Number Publication Date
EP0825573A1 EP0825573A1 (fr) 1998-02-25
EP0825573B1 true EP0825573B1 (fr) 2001-12-19
EP0825573B2 EP0825573B2 (fr) 2005-03-23

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EP19960113304 Expired - Lifetime EP0825573B2 (fr) 1996-08-19 1996-08-19 Procédé et dispositif d'analyse d'un signal d'un capteur de mouvements

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DE (1) DE59608506D1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2103909A1 (de) * 1970-02-06 1971-08-19 Optical Coaring Lab Inc Überwachungseinrichtung zur Fest stellung der Anwesenheit eines Eindring lings in einem Raum

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086369A1 (fr) * 1982-02-12 1983-08-24 Cerberus Ag Détecteur infra-rouge d'intrusion avec récepteur à rayonnement pyroélectrique
DE3433087A1 (de) * 1984-09-08 1986-03-20 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen Signalauswerteschaltung fuer einen bewegungsmelder zur raumueberwachung
US4783592A (en) * 1987-11-02 1988-11-08 Santa Barbara Research Center Real time adaptive round discrimination fire sensor
US5025378A (en) * 1989-04-03 1991-06-18 Honeywell Inc. Horizontal stabilizer motion detector
DE4005169A1 (de) * 1990-02-17 1991-08-22 Bellmann B V Bewegungsmelder
US5408420A (en) * 1990-03-09 1995-04-18 Emerson Electric Co. Line leak test apparatus measuring rate of pressure change in a liquid storage and dispensing system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2103909A1 (de) * 1970-02-06 1971-08-19 Optical Coaring Lab Inc Überwachungseinrichtung zur Fest stellung der Anwesenheit eines Eindring lings in einem Raum

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
"AlgoRex - Das neue interaktive Brandmeldesystem mit AlgoLogic", in Cerberus-Alarm, Nr. 116/1994 *
Fuhrmann H.: 'Gefahrenmeldesysteme', Hüthig Buchverlag, Heidelberg, 1992 *
Heinen B.: 'Analoge Prozessmeldetechnik für höchste Sicherheit im Gebäude- und Objektschutz', VDI-Berichte Nr. 896, 1981, S. 319 - 338 *
Heinen B.: 'Intrusionsschutz für gewerbliche Risiken', ESSERs Präsentation bei der EAB, Berlin-DDR, 07.02.1990 *
Luck H.: '10. Internationale Konferenz über automatische Brandentdeckung AUBE 95', Proceedings, Verlag Mainz, Aachen, 1995. *
Schmidhäusler F.: 'Brandfrüherkennung: Verfahren, Techniken, Alternativen', Verlag Moderne Industrie, Landsberg, 1994. *

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Publication number Publication date
DE59608506D1 (de) 2002-01-31
EP0825573B2 (fr) 2005-03-23
EP0825573A1 (fr) 1998-02-25

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