EP0125443A1 - Controlled barrier - Google Patents

Controlled barrier Download PDF

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Publication number
EP0125443A1
EP0125443A1 EP84103375A EP84103375A EP0125443A1 EP 0125443 A1 EP0125443 A1 EP 0125443A1 EP 84103375 A EP84103375 A EP 84103375A EP 84103375 A EP84103375 A EP 84103375A EP 0125443 A1 EP0125443 A1 EP 0125443A1
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EP
European Patent Office
Prior art keywords
sound tube
lock according
transmitter
receiver
barrier
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
EP84103375A
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German (de)
French (fr)
Other versions
EP0125443B1 (en
Inventor
Hans Müller
Berthold Dernbach
Heribert Weigl
Herbert Dr. Tratz
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Kraftwerk Union AG
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Kraftwerk Union AG
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Publication date
Application filed by Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of EP0125443A1 publication Critical patent/EP0125443A1/en
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Publication of EP0125443B1 publication Critical patent/EP0125443B1/en
Expired legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
    • G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/01—Grilles fixed to walls, doors, or windows; Grilles moving with doors or windows; Walls formed as grilles, e.g. claustra

Definitions

  • the invention relates to a lock that can be monitored, in particular for the protection of property at nuclear power plants, with a linear monitoring section that gives a signal when a defined deformation and / or when the lock is destroyed.
  • the monitoring section is designed as a concentric pipe arrangement.
  • the outer tube which belongs to a grid serving as a barrier, is electrically insulated from an inner tube.
  • the two pipes are then connected to an alarm device via an electrical cable. There is therefore a signal if there is electrical contact between the two pipes if the lock is destroyed.
  • the invention is based on the object of creating a monitorable barrier in which one is not dependent on the barrier being made of conductive material over practically its entire length.
  • the monitoring path is formed by an ultrasound beam, which runs from a transmitter to a receiver within the undamaged barrier, and that the interruption of the ultrasound beam triggers the signal.
  • You are completely independent of the material of the lock.
  • the signal is caused in that a deformation of the barrier deflects or blocks the ultrasound beam. It can therefore also be triggered with certainty when using plastic or concrete to block and limit the ultrasound beam.
  • the ultrasound beam can be guided from the transmitter to the receiver with the aid of a reflector.
  • a reflector that may be bent several times at an angle.
  • the transmitter and receiver are arranged as a tandem ultrasound head at one end of the monitoring section and the reflector at the other end of the monitoring section.
  • the parts to be provided with electrical connections can be combined at a single point, so that the connection is particularly simple.
  • the monitoring section can advantageously run through a sound tube that is embedded in the barrier. This is particularly recommended for barriers made of concrete, because the pipe, possibly completed with transmitter and receiver, can be prefabricated as a component and then cast in.
  • the sound tube can also be equipped with perforated screens to increase the sensitivity. Under certain circumstances, this would place higher demands on the focusing of the transmitter and receiver or of the reflector.
  • this construction of the invention even a slight lateral force which is exerted on the sound tube results in a strong moment which deflects the reflector plate and thus leads to an interruption of the ultrasound beam.
  • the invention can advantageously also be implemented in such a way that, in the case of extensive barriers with a plurality of adjacent monitoring routes, these are made effective in chronological order. This can simplify the ultrasound devices.
  • the time sequence can be clocked irregularly to increase security, for example with the aid of a random generator.
  • the monitoring sections can also be in constant operation.
  • FIG. 1 shows a side view with a partial section as a barrier, an object protection gate according to the invention, of which a vertical section can be seen in FIG. 2.
  • 3 shows a security fence.
  • 4 shows a longitudinal section through a bar of a rake.
  • Fig. 5 shows an associated cross section, while in Figs. 6 and 7 details on a larger scale are seen.
  • 8 shows a somewhat simplified embodiment compared to the rake according to FIG. 4.
  • 9 and 10 show corresponding details on a larger scale.
  • the monitoring sections comprise a sound tube 4, which is fixed with supports 5 in the middle of the cavity 6 formed by the rods 2 or the frame 1.
  • a reflector 7 is arranged at the lower end of the sound tube 4.
  • the upper end is provided with the transmitter and receiver combined as a tandem head 8 for an ultrasound beam 9 along the axis of the cylindrical sound tube 4.
  • the object protection fence 10 is made of concrete. It comprises a base wall 11 and concrete struts 12. The monitoring sections 3 are cast into these, a cavity 13 being formed on the top, which is releasably closed by a cover 14 for access to the tandem head 8.
  • the rake rod 20 shown in FIG. 4 for water courses has the cross section of an elongated rectangle, as shown in FIG. 5. It contains the sound tube 4 with a circular cross section in the region of its front side 21, as shown in FIG. 5.
  • the sound tube 4 has a diameter of approximately 25 x 2 mm and is provided with a reflector plate 22 at the lower end, as can be seen in FIG. 7. This rises with a shaft 23 a tapered centering head 24, which is embedded in a bore 25 of the bottom plate 26 of the rake.
  • the centering head can, for example, be screwed into an internal thread 28 of the sound tube 4 with a threaded pin 27.
  • the tandem head 8 is screwed into the internal thread 30. It forms the transmitter and receiver for ultrasound beams with frequencies in the range from 40 to 80 kHz.
  • a clamp 31 is also attached there, which engages around the sound tube 4 and is fastened with a screw 32 to a stiffening wall 33 inside the computing rod 20.
  • support plates 35 distributed over the length are provided between the sound tube 4 and at least the front side 21 of the rake rod 20. They ensure that deformations, such as can occur when trying to forcefully penetrate the rake rod 20, are transmitted to the sound tube 4 even with small deflections. This is then deformed so that the beam path indicated by the broken line 9 between the transmitter of the ultrasound head 8, the reflector plate 22 and the receiver also contained in the tandem head 8 is interrupted. A signal is then triggered, which indicates the attempted penetration on the computing rod 20.
  • a pinhole 37 is attached in the middle. It reduces the passage cross-section to, for example, 100 mm 2 , ie approximately 1/5 of the sound tube cross-section, and increases the responsiveness of the monitoring path by suppressing interference radiation running at the edge, which can result from a scattering of transmitter and receiver or reflector plate. Such pinholes can also be distributed several times over the length of the sound tube 4.
  • the tandem head 8 is fastened in a holder 40 which corresponds to the upper end of the sound tube 4 described with reference to FIG. 4.
  • the bracket is attached to the intermediate wall 33 with a screw 41.
  • the reflector plate is formed here by the flat upper side 43 of a threaded pin 44 which is screwed into a holder 45 screwed to the base plate 26.
  • the increased arrangement of the reflector plate shown in FIGS. 7 and 10 ensures that condensation water can run off from the reflective upper side, so that the reflector effect is not impaired.
  • Monitoring based on the echo sounder principle preferably detects the above-mentioned changes a change in signal transit time and amplitude of the individual measuring points.
  • the transducers in the individual sound tubes can be controlled together with a frequency generator when the pulse-pause ratios change by means of a random generator. Alternating group control is also possible.
  • the transducers 8 are divided into groups and alternately controlled at variable time intervals.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

1. A controllable barrier (1, 2), in particular for the protection of objects at nuclear power stations, comprising a controlled section (3), where from a determined deformation and/or in the event of a destruction of the barrier (1, 2) a signal is transmitted, characterised in that the control section (3) is formed by an ultrasonic beam (9) which travels in a cavity (6) of the undamaged barrier (1, 2) from a transmitter (8) to a receiver (8) and whose interruption triggers a signal, where the transmitter and receiver are arranged as a tandem ultrasonic head (8) at the one end of the controlled section (3) and a reflector (7) is arranged at the other end of the controlled section (3), with whose aid the ultrasonic beam (9) is guided from the transmitter (8) to the receiver (8).

Description

Die Erfindung betrifft eine überwachbare Sperre, insbesondere für den Objektschutz an Kernkraftwerken, mit einer linienhaften Uberwachungsstrecke, die ab einer definierten Verformung und/oder bei einer Zerstörung der Sperre ein Signal gibt.The invention relates to a lock that can be monitored, in particular for the protection of property at nuclear power plants, with a linear monitoring section that gives a signal when a defined deformation and / or when the lock is destroyed.

Bei einer aus der DE-PS 26 53 056 bekannten Schutzvorrichtung für die Luftdurchtrittsbereiche von Räumen oder Gebäuden ist die Uberwachungsstrecke als konzentrische Rohranordnung ausgebildet. Das äußere Rohr, das zu einem als Sperre dienenden Gitter gehört, ist dabei gegenüber einem inneren Rohr elektrisch isoliert. Die beiden Rohre werden dann über ein elektrisches Kabel mit einem Alarmgerät verbunden. Deshalb gibt es ein Signal, wenn bei einer Zerstörung der Sperre ein elektrischer Kontakt zwischen den beiden Rohren zustande kommt.In a protective device known from DE-PS 26 53 056 for the air passage areas of rooms or buildings, the monitoring section is designed as a concentric pipe arrangement. The outer tube, which belongs to a grid serving as a barrier, is electrically insulated from an inner tube. The two pipes are then connected to an alarm device via an electrical cable. There is therefore a signal if there is electrical contact between the two pipes if the lock is destroyed.

Die Erfindung geht von der Aufgabe aus, eine überwachbare Sperre zu schaffen, bei der man nicht davon abhängig ist, daß die Sperre über praktisch ihre gesamte Länge aus leitfähigem Material besteht.The invention is based on the object of creating a monitorable barrier in which one is not dependent on the barrier being made of conductive material over practically its entire length.

Erfindungsgemäß ist vorgesehen, daß die Uberwachungsstrecke von einem Ultraschallstrahl gebildet wird, der innerhalb der unbeschädigten Sperre von einem Sender zu einem Empfänger verläuft, und daß die Unterbrechung des Ultraschallstrahls das Signal auslöst. Hiermit ist man von dem-Material der Sperre vollständig unabhängig. Das Signal wird dadurch veranlaßt, daß eine Verformung der Sperre den Ultraschallstrahl auslenkt oder sperrt. Es kann deshalb auch zum Beispiel bei der Verwendung von Kunststoff oder Beton für die Sperre und die Begrenzung des Ultraschallstrahls mit Sicherheit ausgelöst werden.According to the invention, it is provided that the monitoring path is formed by an ultrasound beam, which runs from a transmitter to a receiver within the undamaged barrier, and that the interruption of the ultrasound beam triggers the signal. You are completely independent of the material of the lock. The signal is caused in that a deformation of the barrier deflects or blocks the ultrasound beam. It can therefore also be triggered with certainty when using plastic or concrete to block and limit the ultrasound beam.

Der Ultraschallstrahl kann bei der Erfindung mit Hilfe eines Reflektors vom Sender zum Empfänger geführt werden. Damit kann man zum Beispiel größere Flächen durch eine in einem Winkel gegebenenfalls mehrfach abgeknickte Strahlenführung erfassen. Eine andere vorteilhafte Möglichkeit besteht darin, daß Sender und Empfänger als Tandem-Ultraschallkopf am einen Ende der Überwachungsstrecke und der Reflektor am anderen Ende der Überwachungsstrecke angeordnet sind. Hierbei können die mit elektrischen Anschlüssen zu versehenden Teile an einer einzelnen Stelle zusammengefaßt sein, so daß der Anschluß besonders einfach ist.In the invention, the ultrasound beam can be guided from the transmitter to the receiver with the aid of a reflector. This allows, for example, larger areas to be covered by means of a beam guide that may be bent several times at an angle. Another advantageous possibility is that the transmitter and receiver are arranged as a tandem ultrasound head at one end of the monitoring section and the reflector at the other end of the monitoring section. Here, the parts to be provided with electrical connections can be combined at a single point, so that the connection is particularly simple.

Die Überwachungsstrecke kann vorteilhaft durch ein Schallrohr verlaufen, das in die Sperre eingelassen ist. Dies empfiehlt sich besonders für Sperren aus Beton, weil dabei das gegebenenfalls mit Sender und Empfänger komplettierte Rohr als Bauelement vorgefertigt und dann eingegossen werden kann.The monitoring section can advantageously run through a sound tube that is embedded in the barrier. This is particularly recommended for barriers made of concrete, because the pipe, possibly completed with transmitter and receiver, can be prefabricated as a component and then cast in.

Das Schallrohr kann ferner mit Lochblenden zur Erhöhung der Ansprechempfindlichkeit versehen werden. Damit wären unter Umständen höhere Anforderungen an die Fokussierung des Senders und Empfängers bzw. des Reflektors zu stellen.The sound tube can also be equipped with perforated screens to increase the sensitivity. Under certain circumstances, this would place higher demands on the focusing of the transmitter and receiver or of the reflector.

Bei der Verwendung eines Reflektors kann man vorteilhaft so vorgehen, daß das eine Ende des Schallrohres mit einer Reflektorplatte verschlossen ist, und daß die dem Rohrinneren abgekehrte Seite der Reflektorplatte als Zentrierkopf dient, mit dem das Schallrohr in der Sperre festgelegt ist. Bei dieser Bauweise der Erfindung ergibt schon eine geringfügige Seitenkraft, die auf das Schallrohr ausgeübt wird, ein starkes Moment, das die Reflektorplatte auslenkt und damit zu einer Unterbrechung des Ultraschallstrahls führt.When using a reflector, one can advantageously proceed in such a way that one end of the sound tube is closed with a reflector plate, and that the side of the reflector plate facing away from the inside of the tube serves as a centering head with which the sound tube is fixed in the lock. With this construction of the invention, even a slight lateral force which is exerted on the sound tube results in a strong moment which deflects the reflector plate and thus leads to an interruption of the ultrasound beam.

Zur mechanischen Kopplung des Schallrohres mit der Sperre kann man mehrere über die Länge des Schallrohres verteilte Stützen vorsehen, damit schon kleine Einwirkungen auf die Sperre mit geringen Verformungen mit Sicherheit erfaßt werden.For the mechanical coupling of the sound tube with the lock, several supports distributed over the length of the sound tube can be provided, so that even small effects on the lock can be detected with little deformation with certainty.

Die Erfindung kann vorteilhaft auch so verwirklicht werden, daß bei flächenhaften Sperren mit mehreren benachbarten Uberwachungsstrecken diese in zeitlicher Folge wirksam gemacht werden. Hierdurch kann man eine Vereinfachung der Ultraschalleinrichtungen erreichen. Die zeitliche Folge kann zur Vergrößerung der Sicherheit unregelmäßig getaktet werden, zum Beispiel mit Hilfe eines Zufallsgenerators. Im einfachsten Fall können die Überwachungsstrecken aber auch ständig in Betrieb sein.The invention can advantageously also be implemented in such a way that, in the case of extensive barriers with a plurality of adjacent monitoring routes, these are made effective in chronological order. This can simplify the ultrasound devices. The time sequence can be clocked irregularly to increase security, for example with the aid of a random generator. In the simplest case, the monitoring sections can also be in constant operation.

Anhand der Zeichnung werden im folgenden mehrere Ausführungsbeispiele beschrieben. Dabei zeigt die Fig. 1 in einer Seitenansicht mit einem Teilschnitt als Sperre ein Objektschutz-Tor nach der Erfindung, von dem in Fig. 2 ein Vertikalschnitt zu sehen ist. Die Fig. 3 zeigt einen Objektschutz-Zaun. In Fig. 4 ist ein Längsschnitt durch einen Stab eines Rechens dargestellt. Die Fig. 5 zeigt einen zugehörigen Querschnitt, während in Fig. 6 und 7 Einzelheiten in größerem Maßstab zu sehen sind. In Fig. 8 ist eine gegenüber dem Rechen nach Fig. 4 etwas vereinfachte Ausführung gezeichnet. Die Fig. 9 und 10 zeigen entsprechende Einzelheiten in größerem Maßstab.Several exemplary embodiments are described below with reference to the drawing. 1 shows a side view with a partial section as a barrier, an object protection gate according to the invention, of which a vertical section can be seen in FIG. 2. 3 shows a security fence. 4 shows a longitudinal section through a bar of a rake. Fig. 5 shows an associated cross section, while in Figs. 6 and 7 details on a larger scale are seen. 8 shows a somewhat simplified embodiment compared to the rake according to FIG. 4. 9 and 10 show corresponding details on a larger scale.

Das Objektschutz-Tor nach Fig. 1 besteht aus einem Metallrahmen 1 mit vertikalen Gitterstäben 2. Jeder zweite der Gitterstäbe ist mit einer Überwachungsstrecke 3 versehen, wie die Fig. 2 deutlich zeigt. Die Uberwachungsstrecken umfassen ein Schallrohr 4, das mit Abstützungen 5 in der Mitte des von den Stäben 2 bzw. dem Rahmen 1 gebildeten Hohlraums 6 festgelegt ist. Am unteren Ende des Schallrohres 4 ist ein Reflektor 7 angeordnet. Das obere Ende ist mit dem als Tandemkopf 8 zusammengefaßten Sender und Empfänger für einen Ultraschallstrahl 9 längs der Achse des zylindrischen Schallrohrs 4 versehen.1 consists of a metal frame 1 with vertical bars 2. Every second of the bars is provided with a monitoring section 3, as FIG. 2 clearly shows. The monitoring sections comprise a sound tube 4, which is fixed with supports 5 in the middle of the cavity 6 formed by the rods 2 or the frame 1. At the lower end of the sound tube 4, a reflector 7 is arranged. The upper end is provided with the transmitter and receiver combined as a tandem head 8 for an ultrasound beam 9 along the axis of the cylindrical sound tube 4.

Der Objektschutz-Zaun 10 nach Fig. 3 besteht aus Beton. Er umfaßt eine Grundmauer 11 und Betonstreben 12. In diese sind die Uberwachungsstrecken 3 eingegossen, wobei an der Oberseite ein Hohlraum 13 gebildet wird, der mit einem Deckel 14 für den Zugang zum Tandemkopf 8 lösbar verschlossen ist.The object protection fence 10 according to FIG. 3 is made of concrete. It comprises a base wall 11 and concrete struts 12. The monitoring sections 3 are cast into these, a cavity 13 being formed on the top, which is releasably closed by a cover 14 for access to the tandem head 8.

Der in Fig. 4 dargestellte Rechenstab 20 für Wasserläufe, zum Beispiel den Kühlwasserein- oder -auslaß, hat den Querschnitt eines länglichen Rechtecks, wie Fig. 5 zeigt. Er enthält im Bereich seiner Vorderseite 21 das Schallrohr 4 mit kreisförmigem Querschnitt, wie die Fig. 5 zeigt. Das Schallrohr 4 hat einen Durchmesser von ca. 25 x 2 mm und ist am unteren Ende, wie in Fig. 7 zu sehen ist, mit einer Reflektorplatte 22 versehen. Diese erhebt sich mit einem Schaft 23 über einen konisch zugespitzten Zentrierkopf 24, der in eine Bohrung 25 der Bodenplatte 26 des Rechenstabes eingelassen ist. Der Zentrierkopf kann zum Beispiel mit einem Gewindezapfen 27 in ein Innengewinde 28 des Schallrohres 4 eingeschraubt sein.The rake rod 20 shown in FIG. 4 for water courses, for example the cooling water inlet or outlet, has the cross section of an elongated rectangle, as shown in FIG. 5. It contains the sound tube 4 with a circular cross section in the region of its front side 21, as shown in FIG. 5. The sound tube 4 has a diameter of approximately 25 x 2 mm and is provided with a reflector plate 22 at the lower end, as can be seen in FIG. 7. This rises with a shaft 23 a tapered centering head 24, which is embedded in a bore 25 of the bottom plate 26 of the rake. The centering head can, for example, be screwed into an internal thread 28 of the sound tube 4 with a threaded pin 27.

Am oberen Ende des Schallrohres ist der Tandemkopf 8 in das Innengewinde 30 eingeschraubt. Er bildet den Sender und Empfänger für Ultraschallstrahlen mit Frequenzen im Bereich von 40 bis 80 kHz. Dort ist audh eine Schelle 31 angebracht, die um das Schallrohr 4 greift und mit einer Schraube 32 an einer Versteifungswand 33 im Inneren des Rechenstabes 20 befestigt ist.At the upper end of the sound tube, the tandem head 8 is screwed into the internal thread 30. It forms the transmitter and receiver for ultrasound beams with frequencies in the range from 40 to 80 kHz. A clamp 31 is also attached there, which engages around the sound tube 4 and is fastened with a screw 32 to a stiffening wall 33 inside the computing rod 20.

Wie die Fig. 4 zeigt, sind zwischen dem Schallrohr 4 und mindestens der Vorderseite 21 des Rechenstabes 20 über die Länge verteilte Stützbleche 35 vorgesehen. Sie sorgen dafür, daß Verformungen, wie sie vor allem bei dem Versuch eines gewaltsamen Eindringens an dem Rechenstab 20 entstehen können, schon bei kleinen Auslenkungen auf das Schallrohr 4 übertragen werden. Dieses wird dann verformt, so daß der durch die gestrichelte Linie 9 angedeutete Strahlengang zwischen dem Sender des Ultraschallkopfes 8,der Reflektorplatte 22 und dem im Tandemkopf 8 ebenfalls enthaltenen Empfänger unterbrochen wird. Daraufhin wird ein Signal ausgelöst, das den Eindringversuch am Rechenstab 20 anzeigt.As FIG. 4 shows, support plates 35 distributed over the length are provided between the sound tube 4 and at least the front side 21 of the rake rod 20. They ensure that deformations, such as can occur when trying to forcefully penetrate the rake rod 20, are transmitted to the sound tube 4 even with small deflections. This is then deformed so that the beam path indicated by the broken line 9 between the transmitter of the ultrasound head 8, the reflector plate 22 and the receiver also contained in the tandem head 8 is interrupted. A signal is then triggered, which indicates the attempted penetration on the computing rod 20.

Im Inneren des Schallrohres 4 ist zum Beispiel in der Mitte eine Lochblende 37 angebracht. Sie verkleinert den Durchtrittsquerschnitt auf zum Beispiel 100 mm2, d.h. etwa 1/5 des Schallrohrquerschnitts und erhöht die Ansprechempfindlichkeit der Uberwachungsstrecke durch die Unterdrückung von am Rand verlaufenden Störstrahlungen, die sich aus einer Streuung von Sender und Empfänger bzw. Reflektorplatte ergeben können. Solche Lochblenden können auch mehrfach über die Länge des Schallrohres 4 verteilt sein.In the interior of the sound tube 4, for example, a pinhole 37 is attached in the middle. It reduces the passage cross-section to, for example, 100 mm 2 , ie approximately 1/5 of the sound tube cross-section, and increases the responsiveness of the monitoring path by suppressing interference radiation running at the edge, which can result from a scattering of transmitter and receiver or reflector plate. Such pinholes can also be distributed several times over the length of the sound tube 4.

Bei der Ausführungsform nach Fig. 8 ist der Tandemkopf 8 in einer Halterung 40 befestigt, die dem oberen Ende des anhand der Fig. 4 beschriebenen Schallrohres 4 entspricht. Die Halterung ist mit einer Schraube 41 an der Zwischenwand 33 angebracht. Die Reflektorplatte wird hier von der ebenen Oberseite 43 eines Gewindestiftes 44 gebildet, der in eine mit der Bodenplatte 26 verschraubte Halterung 45 eingeschraubt ist. Auf ein besonderes Schallrohr ist hier verzichtet. Durch die aus den Fig. 7 und 10 ersichtliche erhöhte Anordnung der Reflektorplatte wird erreicht, daß Schwitzwasser von der reflektierenden Oberseite ablaufen kann, so daß die Reflektorwirkung nicht beeinträchtigt wird.In the embodiment according to FIG. 8, the tandem head 8 is fastened in a holder 40 which corresponds to the upper end of the sound tube 4 described with reference to FIG. 4. The bracket is attached to the intermediate wall 33 with a screw 41. The reflector plate is formed here by the flat upper side 43 of a threaded pin 44 which is screwed into a holder 45 screwed to the base plate 26. There is no special sound tube here. The increased arrangement of the reflector plate shown in FIGS. 7 and 10 ensures that condensation water can run off from the reflective upper side, so that the reflector effect is not impaired.

Der Schallkopf arbeitet bei den Beispielen nach dem Echolotprinzip. Stattdessen könnte aber auch durch eine getrennte Anordnung von Sender und Empfänger eine unmittelbare Überwachung des Strahlenganges erreicht werden. In jedem Fall sollen damit folgende Veränderungen erfaßt werden:

  • - Verbiegen des Schallrohres 4 bzw. des Rechenstabes 20.
  • - Wassereinbruch im Rechenstab durch dessen Beschädigung.
  • - Drahtbruch oder Beschädigung der für den Ultraschallkopf erforderlichen elektrischen Leitungen.
In the examples, the transducer works on the sounder principle. Instead, direct monitoring of the beam path could also be achieved by arranging the transmitter and receiver separately. In any case, the following changes should be recorded:
  • - Bending the sound tube 4 or the rake rod 20.
  • - Water ingress in the rake rod due to its damage.
  • - Broken wire or damage to the electrical cables required for the ultrasound head.

Die Überwachung nach dem Echolotprinzip erfaßt zur Erkennung der vorgenannten Veränderungen vorzugsweise eine Änderung von Signallaufzeit und Amplitude der einzelnen Meßstellen.Monitoring based on the echo sounder principle preferably detects the above-mentioned changes a change in signal transit time and amplitude of the individual measuring points.

Für die in den Fig. 1, 2 und 3 dargestellten Anordnungen mit mehreren benachbarten Uberwachungsstrecken 3 können die Schallköpfe in den einzelnen Schallrohren gemeinsam mit einem Frequenzgenerator bei Veränderung der Puls-Pausen-Verhältnisse mittels Zufallsgenerator angesteuert werden. Als Variante ist auch eine wechselweise Gruppenansteuerung möglich. Hierbei werden die Schallköpfe 8 in Gruppen aufgeteilt und wechselweise in insbesonderen variablen Zeitabständen angesteuert.For the arrangements shown in FIGS. 1, 2 and 3 with a plurality of adjacent monitoring sections 3, the transducers in the individual sound tubes can be controlled together with a frequency generator when the pulse-pause ratios change by means of a random generator. Alternating group control is also possible. Here, the transducers 8 are divided into groups and alternately controlled at variable time intervals.

Claims (9)

1. Überwachbare Sperre, insbesondere für den Objektschutz an Kernkraftwerken, mit einer linienhaften Uberwachungsstrecke, die ab einer definierten Verformung und/oder bei einer Zerstörung der Sperre ein Signal gibt, dadurch gekennzeichnet, daß die Überwachungsstrecke (3) von einem Ultraschallstrahl (9) gebildet wird, der innerhalb der unbeschädigten Sperre (1, 2) von einem Sender (8) zu einem Empfänger (8) verläuft, und daß die Unterbrechung des Ultraschallstrahls (9) das Signal auslöst.1. Monitorable barrier, in particular for the protection of objects at nuclear power plants, with a linear surveillance section which gives a signal from a defined deformation and / or when the barrier is destroyed, characterized in that the surveillance section (3) is formed by an ultrasound beam (9) which runs within the undamaged barrier (1, 2) from a transmitter (8) to a receiver (8), and that the interruption of the ultrasound beam (9) triggers the signal. 2. Sperre nach Anspruch 1, dadurch gekennzeichnet, daß der Ultraschallstrahl (9) mit Hilfe eines Reflektors (7) vom Sender (8) zum Empfänger (8) geführt wird.2. Lock according to claim 1, characterized in that the ultrasound beam (9) with the aid of a reflector (7) from the transmitter (8) to the receiver (8) is guided. 3. Sperre nach Anspruch 2, dadurch gekennzeichnet, daß Sender und Empfänger als Tandem-Ultraschallkopf (8) am einen Ende der Überwachungsstrecke (3) und der Reflektor (7) am anderen Ende der Überwachungsstrecke (8) angeordnet sind.3. Lock according to claim 2, characterized in that the transmitter and receiver are arranged as a tandem ultrasound head (8) at one end of the monitoring section (3) and the reflector (7) at the other end of the monitoring section (8). 4. Sperre nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Überwachungsstrecke (3) durch ein Schallrohr (4) verläuft, das in die Sperre (1, 2) eingelassen ist.4. Lock according to claim 1, 2 or 3, characterized in that the monitoring section (3) extends through a sound tube (4) which is embedded in the lock (1, 2). 5. Sperre nach Anspruch 4, dadurch gekennzeichnet, daß das Schallrohr (4) Lochblenden (37) enthält.5. Lock according to claim 4, characterized in that the sound tube (4) contains perforated screens (37). 6. Sperre nach Anspruch 4 oder 5, dadurch ge-kennzeichnet, daß das eine Ende des Schallrohres (4) mit einer Reflektorplatte (22) verschlossen ist, und daß die dem Rohrinneren abgekehrte Seite der Reflektorplatte (22) als Zentrierkopf (24) dient, mit dem das Schallrohr (4) in der Sperre festgelegt ist.6. Lock according to claim 4 or 5, thereby indicates that one end of the sound tube (4) is closed with a reflector plate (22) and that the side of the reflector plate (22) facing away from the tube interior serves as a centering head (24) with which the sound tube (4) is fixed in the lock is. 7. Sperre nach Anspruch 4, 5 oder 6, dadurch gekennzeichnet, daß das Schallrohr (4) durch mehrere, über seine Länge verteilte Stützen (35) mit der Sperre verankert ist.7. Lock according to claim 4, 5 or 6, characterized in that the sound tube (4) is anchored to the lock by a plurality of supports (35) distributed over its length. 8. Sperre nach einem der Ansprüche 1 bis 7 mit mehreren benachbarten Uberwachungsstrecken in einer flächenhaften Sperre, dadurch gekennzeichnet, daß die Uberwachungsstrecken (3) in zeitlicher Folge wirksam gemacht werden.8. Lock according to one of claims 1 to 7 with a plurality of adjacent monitoring sections in a planar block, characterized in that the monitoring sections (3) are made effective in chronological order. 9. Sperre nach Anspruch 8, dadurch gekennzeichnet, daß die Überwachungsstrecken (3) mit Hilfe eines Zufallsgenerators angesteuert und/oder wirksam gemacht werden.9. Lock according to claim 8, characterized in that the monitoring sections (3) are controlled with the aid of a random generator and / or made effective.
EP84103375A 1983-04-11 1984-03-27 Controlled barrier Expired EP0125443B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833312966 DE3312966A1 (en) 1983-04-11 1983-04-11 MONITORABLE LOCK
DE3312966 1983-04-11

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EP0125443A1 true EP0125443A1 (en) 1984-11-21
EP0125443B1 EP0125443B1 (en) 1987-05-20

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Cited By (4)

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EP0181464A2 (en) * 1984-09-21 1986-05-21 Siemens Aktiengesellschaft Monitoring device for bars of a fence or a coarse barred window
WO1986005837A1 (en) * 1985-04-02 1986-10-09 Joensson Bert Ove Device for indicating a pressure or force
GB2182182B (en) * 1985-04-24 1989-06-28 Sound Special Services Limited Intrusion detecting device
WO2000059759A1 (en) * 1999-03-31 2000-10-12 Simons & Voss Identifikationssysteme Gmbh Seal and sealing method

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DE3503973A1 (en) * 1985-02-06 1986-08-07 Kenny van der 2100 Hamburg Meersch Grating
DE29716609U1 (en) * 1997-09-16 1997-11-20 FRABA Sicherheitssysteme GmbH, 51063 Köln Safety mat
CN102839902B (en) * 2012-08-03 2014-07-02 安徽科蓝智能技术有限公司 Threading method for distributed resistance network anti-theft window
CN104727719B (en) * 2013-12-24 2016-06-08 苏州汇诚智造工业设计有限公司 A kind of manufacture method of the guardrail modelled after an antique with warning box
CN104832069A (en) * 2013-12-24 2015-08-12 张朝峰 Plastic-housing-contained internet-of-things anti-theft guardrail switch

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US2220427A (en) * 1936-03-21 1940-11-05 Ericsson Telefon Ab L M Burglar alarm system
DE1269922B (en) * 1961-08-04 1968-06-06 Licentia Gmbh Housing for ultrasonic barrier device
DE2646160A1 (en) * 1975-12-08 1977-06-23 Cerberus Ag METHOD AND DEVICE FOR MONITORING CONDUCTIVE MEDIA
DE2653056C3 (en) * 1976-11-23 1981-04-23 Bochumer Eisenhütte Heintzmann GmbH & Co, 4630 Bochum Protection device for the air passage areas of rooms or buildings
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DE3129841A1 (en) * 1981-07-29 1983-02-17 Dornier System Gmbh, 7990 Friedrichshafen Device for emitting an alarm in the event of unauthorised entry into a protection zone along a boundary line

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181464A2 (en) * 1984-09-21 1986-05-21 Siemens Aktiengesellschaft Monitoring device for bars of a fence or a coarse barred window
EP0181464A3 (en) * 1984-09-21 1988-07-20 Siemens Aktiengesellschaft Monitoring device for bars of a fence or a coarse barred window
WO1986005837A1 (en) * 1985-04-02 1986-10-09 Joensson Bert Ove Device for indicating a pressure or force
GB2182182B (en) * 1985-04-24 1989-06-28 Sound Special Services Limited Intrusion detecting device
WO2000059759A1 (en) * 1999-03-31 2000-10-12 Simons & Voss Identifikationssysteme Gmbh Seal and sealing method

Also Published As

Publication number Publication date
EP0125443B1 (en) 1987-05-20
DE3312966A1 (en) 1984-10-11
DE3463866D1 (en) 1987-06-25

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