EP1361552A2 - Passive infrared movement detector - Google Patents

Passive infrared movement detector Download PDF

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Publication number
EP1361552A2
EP1361552A2 EP03001703A EP03001703A EP1361552A2 EP 1361552 A2 EP1361552 A2 EP 1361552A2 EP 03001703 A EP03001703 A EP 03001703A EP 03001703 A EP03001703 A EP 03001703A EP 1361552 A2 EP1361552 A2 EP 1361552A2
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EP
European Patent Office
Prior art keywords
amplifier
voltage
passive infrared
sensor element
motion detector
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EP03001703A
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German (de)
French (fr)
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EP1361552B1 (en
EP1361552A3 (en
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Harald Dipl.-Ing. Mundinger
Friedhelm Dipl.-Ing.Dipl.-Wirt-Ing. Wehlmann
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Insta Elektro GmbH and Co KG
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Insta Elektro GmbH and Co KG
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Publication of EP1361552A3 publication Critical patent/EP1361552A3/en
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    • 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 present invention is based on one according to the preamble of Passive infrared motion detector designed from the main claim.
  • Such passive infrared motion detectors are used for monitoring z. B. determine the presence of people in the detection area, which Give off heat in the form of infrared radiation.
  • Such motion detectors have usually a signal generator of the switching signals from z. B. a light source, to switch on a warning system etc. Around a light source only at dusk or Such passive infrared motion detectors are to be switched on reliably in the dark usually also with a sensor element for detection the ambient brightness.
  • the present invention is based on The task is to create a passive infrared motion detector in which by interference signals (e.g. caused by switching operations of the Switching signal generator) caused ringing times occur very briefly, see above that commissioning at the customer or testing in production is quick and easily, in a particularly inexpensive way can.
  • interference signals e.g. caused by switching operations of the Switching signal generator
  • such a passive infrared motion detector a circuit board 1, on which a substantially Sensor element SE for detecting infrared radiation, as well as one of simplicity sake of the amplifier circuit for processing not shown in all details the output signals emitted by the sensor element SE and further one for Influencing the load L to be controlled switching signal generator S available.
  • the feedback network RNW1 is in place also connected on the input side to the second capacitor C2. from The output of the first amplifier V1 is the amplified signal on the input side supplied second capacitor C2, the output side via the second resistor R2 connected to the reference potential BZP and directly to the switching signal generator S. is. Its reference input Ref is directly at the reference potential BZP connected.
  • an interference signal about the impedance ZR is an interference signal, the z. B. from Signal generator S triggered switching operations can occur on the Supply voltage + Ub coupled.
  • Such an interference signal is generated by the first Voltage regulator U1, which is the supply voltage for the first amplifier V1, for the signal generator S and generated for the second voltage regulator U2 for the first time attenuated.
  • the second voltage regulator U2 which is the supply voltage of the Ensures sensor element SE and at the same time generates the reference potential BZP, then attenuates the interference signal again to such an extent that it has no significant value Influence more on the output signal of the sensor element SE.
  • a Pre-amplification of the output signal from the sensor element SE is through the assigned series resistor R in combination with another Impedance Z reached. Such preamplification is particularly space and realizable at low cost.
  • the feedback network RNW1 is in place also connected on the input side to the third capacitor C3. from The output of the first amplifier V1 is the amplified signal on the input side third capacitor C3, the output side via the third resistor R3 with the reference potential BZP and directly with the non-inverting input of the second amplifier V2 is connected.
  • Its inverting input is over his further feedback network RNW2 to the reference potential BZP connected.
  • the feedback network RNW2 is also on the input side the second capacitor C2 in connection. From the output of the second amplifier V2 becomes the further amplified signal on the input side of the second capacitor C2 supplied, the output side via the second resistor R2 with the Reference potential BZP and is connected directly to the signal generator S. Whose Reference input Ref is connected directly to the reference potential BZP.
  • the two amplifiers V1, V2 is a two-stage amplification of the Sensor element SE outgoing output signal realized. Thus it can be protected against interference a particularly large amplification stroke for amplifying that of the sensor element SE outgoing output signals can be achieved.
  • a Interference signal the z. B. from the switching operations triggered by the signal generator S. can arise, coupled to the supply voltage + Ub.
  • Such one Interference signal is generated by the first voltage regulator U1, which is the supply voltage for the first amplifier V1, for the second amplifier V2, for the signal generator S. and generated for the second voltage regulator U2, damped for the first time.
  • the second Voltage regulator U2 the supply voltage of the sensor element SE ensures and at the same time generates the reference potential BZP dampens such Interference signal again so far that there is no longer any significant influence exerts the output signal of the sensor element SE.
  • the second voltage regulator U2 generates a comparatively low voltage, which as already described as the reference voltage BZP for the essential Components of the amplifier train is used.
  • Voltage differences across the capacitors C1 and C2 or C1, C2 and C3 as well the feedback network RNW1 or on the feedback networks RNW1 and RNW2 very low. Due to the low voltage differences again very short charging times for the capacitors C1 and C2 or C1, C2 and C3, which ultimately leads to very short ringing times or to a very rapid calming of the overall system when interference signals occur, e.g. B. caused by switching operations of the switching signal generator S.

Abstract

The device has at least one sensor element (SE) on a circuit board and a circuit for signal evaluation and processing with at least one amplifier and switching signal source supplied by a first voltage regulator (U1), which also supplies a second voltage regulator (U2). The second regulator's output voltage ensures the voltage supply to the sensor element(s) and is also used as a reference voltage (BZP) for other components.

Description

Die vorliegende Erfindung geht von einem gemäß dem Oberbegriff des Hauptanspruches konzipierten Passiv-Infrarot-Bewegungsmelder aus.The present invention is based on one according to the preamble of Passive infrared motion detector designed from the main claim.

Derartige Passiv-Infrarot-Bewegungsmelder werden zur Überwachung eingesetzt um z. B. die Anwesenheit von Menschen im Erfassungsbereich festzustellen, welche Wärme in Form von Infrarotstrahlung abgeben. Solche Bewegungsmelder haben üblicherweise einen Signalgeber der Schaltsignale abgibt um z. B. eine Lichtquelle, eine Warnanlage usw. einzuschalten. Um eine Lichtquelle erst bei Dämmerung bzw. bei Dunkelheit zuverlässig einzuschalten, sind solche Passiv-Infrarot-Bewegungsmelder üblicherweise außerdem mit einem Sensorelement zur Erfassung der Umgebungshelligkeit ausgestattet.Such passive infrared motion detectors are used for monitoring z. B. determine the presence of people in the detection area, which Give off heat in the form of infrared radiation. Such motion detectors have usually a signal generator of the switching signals from z. B. a light source, to switch on a warning system etc. Around a light source only at dusk or Such passive infrared motion detectors are to be switched on reliably in the dark usually also with a sensor element for detection the ambient brightness.

Zur Signalaufbereitung sind die meisten bekannten Geräte mit einem Verstärkerzug ausgestattet, der das Signal des Sensorelementes in eine verwertbare Größenordnung verstärkt. Normiert auf die, zur sinnvollen Signalauswertung erforderlichen, Auswertepegel sind Verstärkungen von 60-70 dB üblich. Realisiert werden diese Verstärkungen oft durch zwei hintereinander geschaltete Bandpässe. Die untere Begrenzung des Frequenzbandes ist zur Unterdrückung der Offsetfehler der Verstärker und des Sensorelementes erforderlich, für die Auswertung langsamer Signale sollte diese Begrenzung aber so tief wie möglich gewählt werden. Die tiefe untere Grenzfrequenz und die hohe Verstärkung führen aber bei der Verarbeitung großer Signale, die die Verstärker in die positive oder negative Begrenzung treiben, zu Problemen hinsichtlich der Nachschwingzeit, aber auch zu grundsätzlichen Stabilitätsproblemen. Die Stabilitätsprobleme werden dabei durch die Rückkopplung der Signale über die Versorgungsspannung auf das Sensorelement hervorgerufen. Zur Dämpfung dieser Rückkopplung wird bei den bekannten, den Stand der Technik repräsentierenden Geräten, die Versorgungsspannung des Sensorelementes mit einer entsprechenden Widerstands-/Kondensatorkombination beschaltet. Um bei niedrigen unteren Grenzfrequenzen eine ausreichende Dämpfung zu erzeugen sind für diese Widerstands-/Kondensatorkombination sehr große Zeitkonstanten erforderlich. Die Realisierung dieser Zeitkonstanten ist nicht nur platzaufwendig und kostenintensiv, außerdem beeinflussen sie die Nachschwingzeit des Verstärkers negativ, d. h. es ergeben sich lange Nachschwingzeiten. Diese langen Nachschwingzeiten machen sich insbesondere bei der Inbetriebnahme beim Kunden und bei Prüfungen im Fertigungsprozess störend bemerkbar, da erforderliche Funktionsüberprüfungen erst nach Ende dieser Nachschwingzeit möglich sind, was entsprechende Kosten durch Wartezeiten verursacht.Most known devices for signal processing are equipped with an amplifier train equipped that the signal of the sensor element in a usable Magnitude increased. Standardized to that for sensible signal evaluation required evaluation levels, amplifications of 60-70 dB are common. implemented these reinforcements are often achieved by two bandpasses connected in series. The lower limit of the frequency band is to suppress the offset errors the amplifier and the sensor element required, slower for the evaluation For signals, however, this limitation should be chosen as low as possible. The depth however, the lower cut-off frequency and the high gain result in processing large signals that drive the amplifiers to the positive or negative limit, to problems regarding the reverberation time, but also to fundamental ones Stability problems. The stability problems are caused by the feedback of the signals via the supply voltage to the sensor element. To dampen this feedback in the known, the prior art representing devices with the supply voltage of the sensor element a corresponding resistor / capacitor combination. To at Adequate damping is to be generated at low lower limit frequencies very large time constants for this resistor / capacitor combination required. The realization of these time constants is not only space-consuming and costly, they also affect the ringing time of the amplifier negative, d. H. there are long ringing times. These long Ringing times are particularly noticeable when commissioning the customer and is noticeably noticeable during tests in the manufacturing process, as required Functional checks are only possible after the end of this ringing period, which corresponding costs caused by waiting times.

Durch die Druckschrift "Pyroelectric Infrared Sensor, Technical Information Tl-101" von Nippon Ceramic Co. LTD aus dem Jahr 1989, S. 16 und 17 ist ein den Stand der Technik repräsentierender Passiv- Infrarot-Bewegungsmelder bekannt geworden.Through the publication "Pyroelectric Infrared Sensor, Technical Information Tl-101" by Nippon Ceramic Co. LTD from 1989, pp. 16 and 17 is the state of the Passive infrared motion detector representing technology has become known.

Ausgehend von einer solchen Ausgestaltung liegt der vorliegenden Erfindung die Aufgabe zugrunde, einen Passiv-Infrarot-Bewegungsmelder zu schaffen, bei dem durch Störsignale (z. B. hervorgerufen durch Schaltvorgänge des Schaltsignalgebers) verursachte Nachschwingzeiten sehr kurzzeitig auftreten, so dass eine Inbetriebnahme beim Kunden bzw. die Prüfung in der Fertigung schnell und einfach, auf besonders kostengünstige Art und Weise vorgenommen werden kann.On the basis of such an embodiment, the present invention is based on The task is to create a passive infrared motion detector in which by interference signals (e.g. caused by switching operations of the Switching signal generator) caused ringing times occur very briefly, see above that commissioning at the customer or testing in production is quick and easily, in a particularly inexpensive way can.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil des Hauptanspruches angegebenen Merkmale gelöst.According to the invention this object is achieved by the in the characterizing part of Main claim specified features solved.

Besonders vorteilhaft bei einer derartigen Ausgestaltung ist, dass auf einfache Art und Weise, nämlich lediglich durch die Einführung eines zusätzlichen Spannungsreglers auch die Stabilität einer solchen Anordnung erheblich erhöht ist, so dass Störungen nur in äußerst seltenen Fällen auftreten können.It is particularly advantageous in such a configuration that in a simple manner and way, namely only by introducing an additional Voltage regulator, the stability of such an arrangement is significantly increased, so that faults can only occur in extremely rare cases.

Weitere vorteilhafte Ausgestaltungen des erfindungsgemäßen Gegenstandes sind in den Unteransprüchen angegeben. Anhand zweier Ausführungsbeispieles sei die Erfindung näher erläutert. Dabei zeigt:

Fig. 1:
prinziphaft ein Schaltbild des erfindungsgemäßen Gegenstandes gemäß ersten Ausführungsbeispiels;
Fig. 2:
prinziphaft ein Schaltbild des erfindungsgemäßen Gegenstandes gemäß zweiten Ausführungsbeispiels.
Further advantageous refinements of the subject matter according to the invention are specified in the subclaims. The invention will be explained in more detail using two exemplary embodiments. It shows:
Fig. 1:
in principle a circuit diagram of the subject matter according to the first embodiment;
Fig. 2:
in principle a circuit diagram of the subject matter according to the second embodiment.

In den Figuren 1 und 2 sind nur die zur Erläuterung des Sachverhaltes notwendigen Komponenten der erfindungsgemäßen Gegenstände dargestellt. Gleichartige Bauteile sind dabei mit den selben Bezugszeichen versehen.In Figures 1 and 2 are only those necessary to explain the facts Components of the objects according to the invention are shown. similar Components are given the same reference numerals.

Wie aus Figur 1 und Figur 2 hervorgeht, weist ein solcher Passiv-Infrarot-Bewegungsmelder eine Leiterplatte 1 auf, auf welcher im wesentlichen ein Sensorelement SE zur Feststellung von Infrarotstrahlung, sowie eine der Einfachheit halber nicht in allen Einzelheiten dargestellte Verstärkerschaltung zur Aufbereitung der vom Sensorelement SE abgegebenen Ausgangssignale und des weiteren ein zur Beeinflussung der anzusteuernden Last L vorgesehenen Schaltsignalgeber S vorhanden sind.As can be seen from Figure 1 and Figure 2, such a passive infrared motion detector a circuit board 1, on which a substantially Sensor element SE for detecting infrared radiation, as well as one of simplicity sake of the amplifier circuit for processing not shown in all details the output signals emitted by the sensor element SE and further one for Influencing the load L to be controlled switching signal generator S available.

Wie des weiteren insbesondere aus Fig. 1 hervorgeht, wird das Ausgangssignal des Sensorelementes SE eingangsseitig dem ersten Kondensator C1 zugeführt, der ausgangsseitig über den ersten Widerstand R1 mit dem Bezugspotential BZP und direkt mit dem nicht invertierenden Eingang des ersten Verstärkers V1 verbunden ist. Dessen invertierender Eingang ist wiederum über das Rückkoppelnetzwerk RNW1 an das Bezugspotential BZP angeschlossen. Das Rückkoppelnetzwerk RNW1 steht außerdem eingangsseitig mit dem zweiten Kondensator C2 in Verbindung. Vom Ausgang des ersten Verstärkers V1 wird das verstärkte Signal eingangsseitig dem zweiten Kondensator C2 zugeführt, der ausgangsseitig über den zweiten Widerstand R2 mit dem Bezugspotential BZP und direkt mit dem Schaltsignalgeber S verbunden ist. Dessen Referenzeingang Ref ist direkt an das Bezugspotential BZP angeschlossen. Über die Impedanz ZR wird ein Störsignal, das z. B. aus den vom Signalgeber S ausgelösten Schaltvorgängen entstehen kann, auf die Versorgungsspannung +Ub gekoppelt. Ein solches Störsignal wird durch den ersten Spannungsregler U1, der die Versorgungsspannung für den ersten Verstärker V1, für den Signalgeber S und für den zweiten Spannungsregler U2 erzeugt, erstmalig gedämpft. Der zweite Spannungsregler U2, der die Versorgungsspannung des Sensorelementes SE sicherstellt und gleichzeitig das Bezugspotential BZP erzeugt, dämpft das Störsignal dann nochmals soweit, dass es keinen nennenswerten Einfluss mehr auf das Ausgangssignal des Sensorelementes SE ausübt. Eine Vorverstärkung des vom Sensorelement SE ausgehenden Ausgangssignals wird durch den zugeordneten Vorwiderstand R in Kombination mit einer weiteren Impedanz Z erreicht. Eine solche Vorverstärkung ist besonders platz- und kostengünstig realisierbar.As is further apparent in particular from FIG. 1, the output signal of the Sensor element SE supplied to the first capacitor C1 on the input side on the output side via the first resistor R1 with the reference potential BZP and is directly connected to the non-inverting input of the first amplifier V1. Its inverting input is in turn via the feedback network RNW1 connected to the reference potential BZP. The feedback network RNW1 is in place also connected on the input side to the second capacitor C2. from The output of the first amplifier V1 is the amplified signal on the input side supplied second capacitor C2, the output side via the second resistor R2 connected to the reference potential BZP and directly to the switching signal generator S. is. Its reference input Ref is directly at the reference potential BZP connected. About the impedance ZR is an interference signal, the z. B. from Signal generator S triggered switching operations can occur on the Supply voltage + Ub coupled. Such an interference signal is generated by the first Voltage regulator U1, which is the supply voltage for the first amplifier V1, for the signal generator S and generated for the second voltage regulator U2 for the first time attenuated. The second voltage regulator U2, which is the supply voltage of the Ensures sensor element SE and at the same time generates the reference potential BZP, then attenuates the interference signal again to such an extent that it has no significant value Influence more on the output signal of the sensor element SE. A Pre-amplification of the output signal from the sensor element SE is through the assigned series resistor R in combination with another Impedance Z reached. Such preamplification is particularly space and realizable at low cost.

Wie des weiteren insbesondere aus Fig. 2 hervorgeht, wird das Ausgangssignal des Sensorelementes SE eingangsseitig dem ersten Kondensator C1 zugeführt, der ausgangsseitig über den ersten Widerstand R1 mit dem Bezugspotential BZP und direkt mit dem nicht invertierenden Eingang des ersten Verstärkers V1 verbunden ist. Dessen invertierender Eingang ist wiederum über das Rückkoppelnetzwerk RNW1 an das Bezugspotential BZP angeschlossen. Das Rückkoppelnetzwerk RNW1 steht außerdem eingangsseitig mit dem dritten Kondensator C3 in Verbindung. Vom Ausgang des ersten Verstärkers V1 wird das verstärkte Signal eingangsseitig dem dritten Kondensator C3 zugeführt, der ausgangsseitig über den dritten Widerstand R3 mit dem Bezugspotential BZP und direkt mit dem nicht invertierenden Eingang des zweiten Verstärkers V2 verbunden ist. Dessen invertierender Eingang ist über sein weiteres Rückkoppelnetzwerk RNW2 an das Bezugspotential BZP angeschlossen. Das Rückkoppelnetzwerk RNW2 steht außerdem eingangsseitig mit dem zweiten Kondensator C2 in Verbindung. Vom Ausgang des zweiten Verstärkers V2 wird das weiter verstärkte Signal eingangsseitig dem zweiten Kondensator C2 zugeführt, der ausgangsseitig über den zweiten Widerstand R2 mit dem Bezugspotential BZP und direkt mit dem Signalgeber S verbunden ist. Dessen Referenzeingang Ref ist direkt an das Bezugspotential BZP angeschlossen. Durch die beiden Verstärker V1, V2 ist eine doppelstufige Verstärkung des vom Sensorelement SE ausgehenden Ausgangssignals realisiert. Somit kann störsicher ein besonders großer Verstärkungshub zur Verstärkung der vom Sensorelement SE ausgehenden Ausgangssignale erreicht werden. Über die Impedanz ZR wird ein Störsignal, das z. B. aus den vom Signalgeber S ausgelösten Schaltvorgängen entstehen kann, auf die Versorgungsspannung +Ub gekoppelt. Ein solches Störsignal wird durch den ersten Spannungsregler U1, der die Versorgungsspannung für den ersten Verstärker V1, für den zweiten Verstärker V2, für den Signalgeber S und für den zweiten Spannungsregler U2 erzeugt, erstmalig gedämpft. Der zweite Spannungsregler U2, der die Versorgungsspannung des Sensorelementes SE sicherstellt und gleichzeitig das Bezugspotential BZP erzeugt, dämpft ein solches Störsignal dann nochmals soweit, dass es keinen nennenswerten Einfluss mehr auf das Ausgangssignal des Sensorelementes SE ausübt.As can further be seen in particular from FIG. 2, the output signal of the Sensor element SE supplied to the first capacitor C1 on the input side on the output side via the first resistor R1 with the reference potential BZP and is directly connected to the non-inverting input of the first amplifier V1. Its inverting input is in turn via the feedback network RNW1 connected to the reference potential BZP. The feedback network RNW1 is in place also connected on the input side to the third capacitor C3. from The output of the first amplifier V1 is the amplified signal on the input side third capacitor C3, the output side via the third resistor R3 with the reference potential BZP and directly with the non-inverting input of the second amplifier V2 is connected. Its inverting input is over his further feedback network RNW2 to the reference potential BZP connected. The feedback network RNW2 is also on the input side the second capacitor C2 in connection. From the output of the second amplifier V2 becomes the further amplified signal on the input side of the second capacitor C2 supplied, the output side via the second resistor R2 with the Reference potential BZP and is connected directly to the signal generator S. Whose Reference input Ref is connected directly to the reference potential BZP. By the two amplifiers V1, V2 is a two-stage amplification of the Sensor element SE outgoing output signal realized. Thus it can be protected against interference a particularly large amplification stroke for amplifying that of the sensor element SE outgoing output signals can be achieved. About the impedance ZR is a Interference signal, the z. B. from the switching operations triggered by the signal generator S. can arise, coupled to the supply voltage + Ub. Such one Interference signal is generated by the first voltage regulator U1, which is the supply voltage for the first amplifier V1, for the second amplifier V2, for the signal generator S. and generated for the second voltage regulator U2, damped for the first time. The second Voltage regulator U2, the supply voltage of the sensor element SE ensures and at the same time generates the reference potential BZP dampens such Interference signal again so far that there is no longer any significant influence exerts the output signal of the sensor element SE.

Der zweite Spannungsregler U2 erzeugt eine vergleichsweise niedrige Spannung, die wie bereits beschrieben als Bezugsspannung BZP für die wesentlichen Komponenten des Verstärkerzuges dient. Durch eine solche Anordnung sind die Spannungsdifferenzen an den Kondensatoren C1 und C2 bzw. C1, C2 und C3 sowie dem Rückkoppelnetzwerk RNW1 bzw. an den Rückkoppelnetzwerken RNW1 und RNW2 sehr niedrig. Durch die niedrigen Spannungsdifferenzen ergeben sich wiederum sehr kurze Ladezeiten für die Kondensatoren C1 und C2 bzw. C1, C2 und C3, was letztendlich zu sehr kurzen Nachschwingzeiten bzw. zu einem sehr schnellen Beruhigen des Gesamtsystems beim Auftreten von Störsignalen, z. B. hervorgerufen durch Schaltvorgänge des Schaltsignalgebers S führt.The second voltage regulator U2 generates a comparatively low voltage, which as already described as the reference voltage BZP for the essential Components of the amplifier train is used. With such an arrangement Voltage differences across the capacitors C1 and C2 or C1, C2 and C3 as well the feedback network RNW1 or on the feedback networks RNW1 and RNW2 very low. Due to the low voltage differences again very short charging times for the capacitors C1 and C2 or C1, C2 and C3, which ultimately leads to very short ringing times or to a very rapid calming of the overall system when interference signals occur, e.g. B. caused by switching operations of the switching signal generator S.

Es ist somit ein besonders kostengünstig herzustellender und in seinen Funktionen schnell und einfach überprüfbarer, hochstabilisierter Passiv-Infrarot-Bewegungsmelder realisiert, bei dem Störsignale besonders wirkungsvoll ausgefiltert bzw. unterdrückt werden.It is therefore particularly economical to manufacture and functions quick and easy to check, highly stabilized passive infrared motion detector realized in which interference signals are filtered out particularly effectively or suppressed.

Claims (7)

Passiv-Infrarot-Bewegungsmelder mit zumindest einem auf einer Leiterplatte angeordneten Infrarotstrahlung erfassenden Sensorelement und einer zur Aufbereitung und Auswertung der von dem, zumindest einem Sensorelement abgegebenen Signale notwendigen, zumindest einen ersten Verstärker aufweisenden Schaltungsanordnung sowie zumindest einen zur Beeinflussung der anzusteuernden Last vorgesehenen Schaltsignalgeber, wobei auf der Leiterplatte ein erster Spannungsregler zur Versorgung des ersten Verstärkers und des Schaltsignalgebers vorhanden ist, dadurch gekennzeichnet, dass über den ersten Spannungsregler (U1) zumindest ein ebenfalls auf der Leiterplatte (1) angeordneter zweiter Spannungsregler (U2) versorgt wird, dessen Ausgangsspannung zum einen die Versorgung des zumindest einen Sensorelementes (SE) sicherstellt und die zum anderen als Bezugsspannung (BZP) einer für die Gleichstromentkopplung erforderlichen ersten Bauteilkombination mit einem ersten Widerstand (R1) und einem ersten Kondensator (C1) und einer zweiten Bauteilkombination mit einem zweiten Widerstand (R2) und einem zweiten Kondensator (C2), sowie für den ersten Verstärker (V1) mit seinem Rückkoppelnetzwerk (RNW1) dient und die als Referenzspannung (REF) für den Schaltsignalgeber (S) herangezogen ist.Passive infrared motion detector with at least one sensor element which detects infrared radiation arranged on a printed circuit board and a circuit arrangement which has at least one first amplifier and which is necessary for processing and evaluating the signals emitted by the at least one sensor element, and at least one switching signal transmitter provided for influencing the load to be controlled, wherein A first voltage regulator for supplying the first amplifier and the switching signal transmitter is present on the printed circuit board, characterized in that the first voltage regulator (U1) supplies at least one second voltage regulator (U2), also arranged on the printed circuit board (1), the output voltage of which, on the one hand ensures the supply of the at least one sensor element (SE) and the other as a reference voltage (BZP) of a first component combination required for the DC decoupling with a first resistor (R1) and a first K ondensator (C1) and a second component combination with a second resistor (R2) and a second capacitor (C2), as well as for the first amplifier (V1) with its feedback network (RNW1) and which serves as a reference voltage (REF) for the switching signal generator (S ) is used. Passiv-Infrarot-Bewegungsmelder nach Anspruch 1, dadurch gekennzeichnet, dass das Ausgangssignal des ersten Verstärkers (V1) über eine dritte Bauteilkombination mit einem dritten Widerstand (R3) und einem dritten Kondensator (C3) zur Gleichstromentkopplung des vom ersten Verstärker (V1) ausgehenden Signals zumindest einem zweiten Verstärker (V2) mit seinem weiteren Rückkoppelnetzwerk (RNW2) zugeführt wird, welcher eingangsseitig ebenfalls auf die Bezugsspannung (BZP) des zweiten Spannungsreglers (U2) gekoppelt ist. Passive infrared motion detector according to claim 1, characterized in that the output signal of the first amplifier (V1) via a third component combination with a third resistor (R3) and a third capacitor (C3) for DC decoupling of the signal emanating from the first amplifier (V1) At least one second amplifier (V2) with its further feedback network (RNW2) is supplied, which is also coupled on the input side to the reference voltage (BZP) of the second voltage regulator (U2). Passiv-Infrarot-Bewegungsmelder nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Ausgangssignal des zweiten Verstärkers (V2) über den zweiten Widerstand (R2) in Kombination mit dem zweiten Kondensator (C2) dem Schaltsignalgeber (S) zugeführt wird.Passive infrared motion detector according to claim 1 or 2, characterized in that the output signal of the second amplifier (V2) via the second resistor (R2) in combination with the second capacitor (C2) is supplied to the switching signal generator (S). Passiv-Infrarot-Bewegungsmelder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Versorgungsspannung zumindest für den ersten Verstärker (V1), für den Schaltsignalgeber (S) und für den zweiten Spannungsregler (U2) über den ersten Spannungsregler (U1) mit seiner Impedanz aus der Betriebsspannung (+Ub) erzeugt wird.Passive infrared motion detector according to one of claims 1 to 3, characterized in that the supply voltage at least for the first amplifier (V1), for the switching signal generator (S) and for the second voltage regulator (U2) via the first voltage regulator (U1) its impedance is generated from the operating voltage (+ Ub). Passiv-Infrarot-Bewegungsmelder nach einem der Ansprüche 1 bis 4 dadurch gekennzeichnet, dass mindestens einer der beiden Spannungsregler (U1, U2) diskret ausgeführt ist.Passive infrared motion detector according to one of claims 1 to 4, characterized in that at least one of the two voltage regulators (U1, U2) is designed discretely. Passiv-Infrarot-Bewegungsmelder nach einem der Ansprüche 1 bis 5 dadurch gekennzeichnet, dass mit dem Sensorelement (SE), dem Vorwiderstand (R) und der weiteren Impedanz (Z) ein Verstärkerzug zur Vorverstärkung für die vom Sensorelement (SE) ausgehenden Signale gebildet ist.Passive infrared motion detector according to one of claims 1 to 5, characterized in that the sensor element (SE), the series resistor (R) and the further impedance (Z) form an amplifier train for preamplification for the signals coming from the sensor element (SE) , Passiv-Infrarot-Bewegungsmelder nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass zumindest ein Teil des Verstärkerzuges in einem auf der Leiterplatte (1) angeordneten Mikrocontroller vorhanden ist.Passive infrared motion detector according to one of claims 1 to 6, characterized in that at least part of the amplifier train is present in a microcontroller arranged on the printed circuit board (1).
EP03001703A 2002-05-10 2003-01-27 Passive infrared movement detector Expired - Lifetime EP1361552B1 (en)

Applications Claiming Priority (2)

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DE10220667A DE10220667C1 (en) 2002-05-10 2002-05-10 Passive infrared motion sensor has second regulator whose output voltage ensures voltage supply to sensor element(s) and is also used as reference voltage for other components
DE10220667 2002-05-10

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EP1361552A2 true EP1361552A2 (en) 2003-11-12
EP1361552A3 EP1361552A3 (en) 2009-10-28
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EP1361552B1 (en) 2011-07-27
EP1361552A3 (en) 2009-10-28
DE10220667C1 (en) 2003-05-15

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