EP2533218A1 - Manipulation-proof switch and manipulation-proof method, in particular for monitoring doors, windows, etc. - Google Patents
Manipulation-proof switch and manipulation-proof method, in particular for monitoring doors, windows, etc. Download PDFInfo
- Publication number
- EP2533218A1 EP2533218A1 EP11004764A EP11004764A EP2533218A1 EP 2533218 A1 EP2533218 A1 EP 2533218A1 EP 11004764 A EP11004764 A EP 11004764A EP 11004764 A EP11004764 A EP 11004764A EP 2533218 A1 EP2533218 A1 EP 2533218A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnet
- housing
- open
- closed
- contact
- 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.)
- Withdrawn
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
-
- 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
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/04—Monitoring of the detection circuits
- G08B29/046—Monitoring of the detection circuits prevention of tampering with detection circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/0006—Permanent magnet actuating reed switches
- H01H36/0013—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits
- H01H36/0026—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits comprising a biasing, helping or polarising magnet
Definitions
- the invention describes a tamper-proof switch and a tamper-proof method, in particular for monitoring doors, windows, etc.
- WO 03/025873 a device is described with various reed contact switches, which are each arranged in a fixed housing at different locations and connected to each other with different circuits. Now, if a housing is moved or manipulated in position, so change the inside of the housing circuits, causing an alarm is triggered.
- the signal cables are regularly in the devices known from the prior art undervoltage. If the signal cables are disconnected or the secured object is opened, the corresponding circuit is interrupted and an alarm message is triggered.
- such devices are relatively easy to manipulate by the signal cable is first bridged and then the reed contact or the corresponding safety device can be removed.
- This manipulation possibility was well background of GB 2434018 where in a manipulation first under different (identical) signal cables, the active signal cables must be found.
- Such devices have the intrinsic disadvantage that the signal cables must be permanently supplied with voltage, which requires a correspondingly secure voltage supply and also results in a constant power consumption.
- Object of the present invention is to describe a tamper-resistant device and a similar method, which is not subject to the disadvantages mentioned above and yet simple in construction and flexible in assembly and service.
- Fig. 1 an advantageous embodiment of the inventive device is exemplified and shown schematically.
- a secure against manipulation housing 6 (shown schematically) is a reed contact 3 and a displaceable in its position and fixable magnet 1.
- Shown in Fig. 1 is a voltage source and two control lights 4.
- the housing 6 the remaining electronic and electrical components and a radio transmitter / receiver (not shown) housed.
- the housing 6 is usually attached to a fixed location of the monitored object such as door or window tamper-proof and closed.
- a second magnet 2 is included in a further housing 5.
- the housing 5 is usually attached to the moving object such as door or window, and it is also easily possible to attach the housing 5 at a fixed location and the housing 6 on the moving object to be monitored.
- the reed contact 3 In the normal state, the reed contact 3 is open and no current flows. Due to their displaceability in the housing 6 and their dimensions, the magnetic fields emanating from the two magnets 1 and 2 can be arranged such that the resultant magnetic force acting on the reed contact 3 keeps the reed contact 3 open, which is optically visible through the indicator lights 4 is done. If either the housing 6 or the housing 5 is manipulated or removed or displaced, the resultant magnetic field force is thereby changed the two magnets 1 u. 2 that the reed contact 3 closes and an alarm is triggered immediately. The same happens when the device according to the invention is somehow attempted to manipulate by means of a foreign magnet.
- the reed contact 3 is open at rest, although this is not mandatory.
- the magnets 1 and 2 can also be dimensioned and arranged so that the reed contact 3 closed in the rest position and in any manipulation or relative movements of the housing 5 u. 6 opens to each other.
- the inventive device proves to be tamper-proof due to the special construction arrangement.
- housing 5 and 6 can be mounted almost anywhere on the object to be monitored by the two housing 5 u. 6 are positioned on site so that the two indicator lights 4 do not light up. In this position, the housing 5 and 6 can be temporarily fixed and the optimal working position of the inventive device can be manually (fine) adjusted by moving the magnet 1. After this fine adjustment, the two housings 5 and 6 can definitely be fastened to the object to be monitored.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
Abstract
Description
Die Erfindung beschreibt einen manipulationssicheren Schalter und ein manipulationssicheres Verfahren insbesondere zur Überwachung von Türen, Fenster etc.The invention describes a tamper-proof switch and a tamper-proof method, in particular for monitoring doors, windows, etc.
Aus dem Stand der Technik sind verschiedene Vorrichtungen und Verfahren zur Einbruchsicherung sowie zur Überwachung von Türen und Fenster und anderen Objekten bekannt. Als unproblematisch und technisch verhältnismässig einfach realisierbar erweisen sich Vorrichtungen zum Feststellen von Bewegungen der zu überwachenden Objekten wie Türen und Fenster mittels mechanischer, elektrischer oder/und magnetischer Schalter, welche nicht gegen mögliche Manipulationen geschützt werden müssen.Various devices and methods for burglar alarm and for monitoring doors and windows and other objects are known from the prior art. Unproblematic and technically relatively easy to implement are devices for detecting movements of objects to be monitored, such as doors and windows by means of mechanical, electrical and / or magnetic switches, which need not be protected against possible manipulation.
Zur Realisation solcher Vorrichtungen erweisen sich in der Praxis so genannte Reedkontakte in verschiedener Hinsicht als vorteilhaft (Preis, mech. Eigenschaften, Zuverlässigkeit, Grösse, elektrische und magnetische Eigenschaften, Modifikationsmöglichkeiten, etc.).For the realization of such devices, so-called reed contacts prove in practice to be advantageous in many respects (price, mechanical properties, reliability, size, electrical and magnetic properties, modification possibilities, etc.).
Als problematisch an den aus dem Stand der Technik bekannten Schaltern erweist sich regelmässig die Manipulationssicherheit solcher Vorrichtungen. Eine Einbruchsicherung bzw. verlässliche Überwachung gewährleistet bekanntlich nur dann effektiven Schutz, wenn die Sicherung bzw. die entsprechende Vorrichtung nicht manipuliert werden kann.As problematic to the known from the prior art switches proves regularly the tamper resistance of such devices. An intrusion detection or reliable monitoring is known to ensure effective protection only if the backup or the corresponding device can not be manipulated.
Aus dem Stand der Technik sind verschiedene Verfahren und Vorrichtungen bekannt, welche die Manipulationssicherheit von Ueberwachungen erhöhen. In
In
In
Nachteilig an den aus dem Stand der Technik bekannten Vorrichtungen und Verfahren ist einerseits die Tatsache, dass diese verhältnismäsig aufwändig sind, wie dies auch in den erwähnten Schriften
Um Manipulationen feststellen zu können, befinden sich bei den aus dem Stand der Technik bekannten Vorrichtungen die Signalkabel regelmässig unter Spannung. Werden die Signalkabel getrennt oder wird das gesicherte Objekt geöffnet, so wird der entsprechende Schaltkreis unterbrochen und eine Alarmmeldung ausgelöst. Allerdings sind solche Vorrichtungen verhältnismässig einfach manipulierbar, indem das Signalkabel zuerst überbrückt wird und anschliessend der Reedkontakt bzw. die entsprechende Sicherheitsvorrichtung entfernt werden kann. Diese Manipulationsmöglichkeit war wohl Hintergrund von
Ein weiterer Nachteil der bekannten Vorrichtungen ergibt sich aus
Aufgabe der vorliegenden Erfindung ist es, eine manipulationssichere Vorrichtung und ein ebensolches Verfahren zu beschreiben, welche nicht mit den oben erwähnten Nachteilen behaftet ist und trotzdem einfach im Aufbau und flexibel in der Montage sowie im Service ist. Object of the present invention is to describe a tamper-resistant device and a similar method, which is not subject to the disadvantages mentioned above and yet simple in construction and flexible in assembly and service.
Gelöst wird diese Aufgabe mittels einer Kombination verschiedener Gesetzmässigkeiten und Vorrichtungen sowie einer geschickten, neuartigen Anordnung bereits bekannter Komponenten wie Reedschalter gemäss den unabhängigen Patentansprüchen sowie des Einsatzes von Funksignalen sowie der Umkehrung von Ruhe- und Betriebszustand.This object is achieved by means of a combination of different laws and devices and a clever, novel arrangement of already known components such as reed switch according to the independent claims and the use of radio signals and the reversal of rest and operating state.
In
In einem weiteren Gehäuse 5 ist ein zweiter Magnet 2 enthalten. Das Gehäuse 5 wird in der Regel am sich bewegenden Objekt wie Türe oder Fenster angebracht, wobei es ohne Weiteres auch möglich ist, das Gehäuse 5 an einem fixen Ort und das Gehäuse 6 am sich bewegenden, zu überwachenden Objekt zu befestigen.In a further housing 5, a
Im Normalzustand ist der Reedkontakt 3 offen und es fliesst kein Strom. Die von den beiden Magneten 1 und 2 ausgehenden Magnetfelder überlagern sich und können aufgrund ihrer Verschiebbarkeit im Gehäuse 6 sowie ihrer Dimensionierung, so angeordnet werden, dass die auf den Reedkontakt 3 wirkende resultierende Magnetkraft den Reedkontakt 3 offen hält, was durch die Kontrolleuchten 4 optisch sichtbar gemacht wird. Wird nun entweder das Gehäuse 6 oder Gehäuse 5 manipuliert bzw. entfernt oder verschoben, so führt die dadurch veränderte, resultierende Magnetfeldkraft der beiden Magnete 1 u. 2 dazu, dass der Reedkontakt 3 schliesst und sofort ein Alarm ausgelöst wird. Dasselbe geschieht, wenn die erfindungsgemässe Vorrichtung mittels eines Fremdmagneten irgendwie zu manipulieren versucht wird.In the normal state, the reed contact 3 is open and no current flows. Due to their displaceability in the
In der beispielhaft gezeigten Ausführungsform ist der Reedkontakt 3 im Ruhezustand offen, wobei dies nicht zwingend ist. Je nach konkreter Aufgabenstellung können die Magnete 1 und 2 auch so dimensioniert und angeordnet werden, damit der Reedkontakt 3 in Ruhestellung geschlossen und bei irgendwelchen Manipulationen oder relativen Bewegungen der Gehäuse 5 u. 6 zueinander öffnet.In the embodiment shown by way of example, the reed contact 3 is open at rest, although this is not mandatory. Depending on the specific task, the
Die erfindungsgemässe Vorrichtung erweist sich aufgrund der speziellen Konstruktionsanordnung als manipulationssicher.The inventive device proves to be tamper-proof due to the special construction arrangement.
Auch die Montage der erfindungsgemässen Vorrichtung erweist sich äusserst praktisch, indem Gehäuse 5 und 6 beinahe an jedem beliebigen Ort des zu überwachenden Objekts angebracht werden können, indem die beiden Gehäuse 5 u. 6 vor Ort so zueinander positioniert werden, damit die beiden Kontrolleuchten 4 nicht leuchten. In dieser Position können die Gehäuse 5 und 6 provisorisch befestigt werden und die optimale Arbeitsposition der erfindungsgemässen Vorrichtung kann durch Verschieben des Magneten 1 manuell (fein-)eingestellt werden. Nach dieser Feineinstellung können die beiden Gehäuse 5 und 6 definitiv beim zu überwachenden Objekt befestigt werden.The assembly of the inventive device proves extremely practical by
Durch Funksignalübertragung sind die üblichen Manipulationen an den Signalkabeln zum vornherein ausgeschlossen.By radio signal transmission, the usual manipulations of the signal cables are excluded from the outset.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11004764A EP2533218A1 (en) | 2011-06-10 | 2011-06-10 | Manipulation-proof switch and manipulation-proof method, in particular for monitoring doors, windows, etc. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11004764A EP2533218A1 (en) | 2011-06-10 | 2011-06-10 | Manipulation-proof switch and manipulation-proof method, in particular for monitoring doors, windows, etc. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2533218A1 true EP2533218A1 (en) | 2012-12-12 |
Family
ID=44675387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11004764A Withdrawn EP2533218A1 (en) | 2011-06-10 | 2011-06-10 | Manipulation-proof switch and manipulation-proof method, in particular for monitoring doors, windows, etc. |
Country Status (1)
Country | Link |
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EP (1) | EP2533218A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3161742A (en) * | 1961-08-24 | 1964-12-15 | Specialties Dev Corp | Magnetic intruder and fire deterctor |
US3668579A (en) * | 1970-11-09 | 1972-06-06 | Door Alarm Device Corp | Magnetic door alarm |
FR2130951A5 (en) * | 1971-03-26 | 1972-11-10 | Dentzer Noxa Groupe | |
FR2347728A1 (en) * | 1976-04-07 | 1977-11-04 | Bae Protection Sa | Antitheft system with automatic detector contact reset - uses magnet to operate contact and has second magnet to reset contact |
US4210888A (en) * | 1978-07-20 | 1980-07-01 | Holce Thomas J | Magnetically operated proximity switch |
US5233323A (en) * | 1992-05-13 | 1993-08-03 | Sentrol, Inc. | Defeat resistant interlock/monitoring system |
US6400267B1 (en) * | 2001-01-05 | 2002-06-04 | Calstar Systems Group, Inc. | Wireless reed switch-based burglar alarm |
US20060192676A1 (en) * | 2005-02-16 | 2006-08-31 | Vogt William R | Alarm sensor |
-
2011
- 2011-06-10 EP EP11004764A patent/EP2533218A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3161742A (en) * | 1961-08-24 | 1964-12-15 | Specialties Dev Corp | Magnetic intruder and fire deterctor |
US3668579A (en) * | 1970-11-09 | 1972-06-06 | Door Alarm Device Corp | Magnetic door alarm |
FR2130951A5 (en) * | 1971-03-26 | 1972-11-10 | Dentzer Noxa Groupe | |
FR2347728A1 (en) * | 1976-04-07 | 1977-11-04 | Bae Protection Sa | Antitheft system with automatic detector contact reset - uses magnet to operate contact and has second magnet to reset contact |
US4210888A (en) * | 1978-07-20 | 1980-07-01 | Holce Thomas J | Magnetically operated proximity switch |
US5233323A (en) * | 1992-05-13 | 1993-08-03 | Sentrol, Inc. | Defeat resistant interlock/monitoring system |
US6400267B1 (en) * | 2001-01-05 | 2002-06-04 | Calstar Systems Group, Inc. | Wireless reed switch-based burglar alarm |
US20060192676A1 (en) * | 2005-02-16 | 2006-08-31 | Vogt William R | Alarm sensor |
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