EP1538577A2 - Glass panel alarm unit - Google Patents

Abstract

The invention relates to an alarm glass pane unit, a System composite of alarm glass pane units and a method to operate the system network.

einer Scheibe (2) aus thermisch vorgespanntem Sicherheitsglas, einer außerhalb der Scheibe (2) angeordneten Primärantenne (22) zur Ausgabe von Abfragesignalen,

einer an einer Seite (16) der Scheibe (2) angeordneten Sekundärantenne (18), die die von der Primärantenne (22) ausgegebenen Abfragesignale aufnimmt und an eine Tertiärantenne (21) weitergibt und von der Tertiärantenne (21) ausgegebene Antwortsignale aufnimmt und an eine Primär-Empfangsantenne (22) ausgibt, und

einem an der Scheibe (2) befestigten, an die Tertiärantenne (21) angeschlossenen passiven Transponder (20), der über die Tertiärantenne (21) die Abfragesignale aufnimmt und Antwortsignale ausgibt.

In order to enable a reliable detection of a breakage of the outer glass pane with a precise identification of the respective alarm glass pane unit in a composite, the alarm glass pane unit (1) comprises:

a pane (2) of thermally toughened safety glass, a primary antenna (22) arranged outside the pane (2) for outputting interrogation signals,

a secondary antenna (18) arranged on one side (16) of the disc (2) which picks up the interrogation signals output from the primary antenna (22) and transmits them to a tertiary antenna (21) and receives response signals output from the tertiary antenna (21) and to a Outputs primary receive antenna (22), and

a passive transponder (20) attached to the disc (2) and connected to the tertiary antenna (21), which receives the interrogation signals via the tertiary antenna (21) and outputs response signals.

Description

The invention relates to an alarm glass pane unit, a System composite of such alarm glass pane units and a Method for operating such a system network.

Such alarm glass units are generally based on the principle of operation, that facing on one of the inside Side of the disc, e.g. the inside of a single pane safety glass pane (Tempered glass), an alarm conductor loop e.g. is applied by screen printing. The disc crumbled upon formation of a crack such as e.g. in places or attempted penetration of the disc always arises, exploding over the entire disk under training very much small glass fragments. By destroying the whole Disc surface becomes the alarm conductor loop, even if it is from The point of violence is more distant and relative has small dimensions, destroyed, so that they are interrupted will or will change their resistance significantly. The change of the resistance value This is generally directly as an alarm signal evaluated.

DE-PS 12 78 292 shows an insulating glass unit with a ESG disk facing on the disc space Inside carries an alarm conductor loop, which via connecting wires with a running outside of the disc, too an alarm transmitter leading line is connected. During installation Such alarm glass panes in a facade arise serious Disadvantages of this wiring. In general, will the connection between an alarm glass and the to the Alarm device or an alarm center leading line system produced by a four-pin connection cable, which is connected to a End with the alarm glass, usually by a soldering of the Cable is connected to the alarm conductor loop, and on the other end has a plug connection to the line. Two Phases of the cable are provided as a backup, the one Prevent bridging of the alarm conductor loop. In these Cabling is a danger that the connection cable damaged during installation, leaving the alarm conductor loop is interrupted. Without a removal of the tempered glass However, it is not possible to determine if this interruption the alarm conductor loop now in the cable or in the alarm conductor loop even by e.g. defective soldering, has occurred. Also the connection of the alarm glass panes to the main line via a connector is often a weak point. Problematic are also generally solder joints of the alarm conductor loop in the space between two discs.

Furthermore, sealing problems of the space between the panes occur on, since the connecting wires of the alarm conductor loop through Holes are led to the outside, either in the Tempered glass pane opposite or in a metallic pane Spacer frames are formed. Leave these holes Only bad seal, so that steam in the otherwise hermetically sealed against the ambient atmosphere Ceiling space of the insulating glass unit can get what due to the resulting increase in dew point, becoming blind the discs at least at lower temperatures leads.

EP 0 058 348 A2 shows an alarm glass pane on which Inside an alarm conductor loop widened at their ends Pads is applied to the connecting wires are soldered. The widened connection surfaces for the connection wires are in the outside of the distance frame lying Edge area of the toughened glass pane arranged and with the alarm conductor loop connected by line sections passing through the Covered metallic spacer frame or a protective layer are led to the outside. The alarm conductor loop thus serves as Breakage sensor and as a supply line in the critical area of the edge seal. However, even with such a solution is still a mechanical breakthrough from the space between the panes required outside, so the risk of leakage does not can be completely excluded.

DE 43 90 350 A1 describes an alarm transmitter arrangement with a coupled resonant circuit of a capacitor and a Kitchen sink. In the event of an alarm, the change in performance is replaced by a Change in resonance frequency measured. The alarm device arrangement thus has one arranged in a movable element sensor-side resonant circuit and a stationary arranged Transmitter circuit, wherein a change in position of the movable Elementes by determining the energy consumption of the transmitter side Oscillatory circuit is detected. Actuator for the Alarm is thus the power change in the inductive coupling two oscillating circuits. Such inductive coupling can occur with other systems through the contacting Partially resolve problems; however, it is e.g. an unauthorized Coupling of another signal with subsequent destruction the glass panel carrying the alarm loop is possible. Furthermore, a separate query of each window is also one larger glass window composite required by their own leads.

A general disadvantage of known alarm glass is at larger facades in their elaborate wiring with the alarm or the alarm center to see there, even if respectively a group of alarm glass panels connected in series to one Line is connected, a very thick wiring harness with a Lead per alarm glass group by often very long cable ducts must be performed and in later stages often not is more accessible. Such many lines also increase the Danger of cable breaks.

For serial switching of entire alarm glass panel groups In addition, if there is a problem with an alarm glass pane, e.g. at an ESG pane or its wiring or connector, no more precise determination of the individual disks concerned be made.

DE-US 28 09 436 describes a fuse arrangement for Glass panes with a capacitive coupling, in which an electric conductive border of the glass sheet as a covering of a capacity is switched on when approaching, touching or breaking Signal triggers. Even with such a system is not specific Detection of individual glass pane units in a larger one Composite possible.

The invention is based on the object over existing Systems to create improvements and in particular one to enable reliable detection of a breakage of the glass pane.

This object is achieved by an alarm glass pane unit Claim 1 and a method according to claim 16 solved. The dependent claims describe preferred developments. Here is in particular a corresponding system composite according to claim 11 intended.

According to the invention is thus a coupling of three antennas provided, namely one outside the glass of the unit primary antenna, one running on the glass, at break of the glass pane destructible secondary antenna and a tertiary antenna connected to the transponder. At break The glass pane thus becomes the connection between the primary antenna and tertiary antenna interrupted. As an actuator thus serves the Receiving the response signal of the transponder to the interrogation signal and not the output signal of e.g. capacitive or inductive sensor.

By using three coupled antennas is one spatial separation between primary and tertiary antenna possible, wherein a conductive or galvanic contact between the Transponder and the outer primary antenna is eliminated. Thus omitted also the problems when contacting by soldering etc. of the transponder, which sometimes occurs in conventional systems, in which the resistance of the alarm loop as an actuator serves.

Advantageously, for each alarm glass pane unit a Transponder with its own, unique, specific identifier provided that can not be changed, so that specific Queries and an accurate identification of the unit also in one larger composite are possible. The transponder generates here advantageously a digital signal due to the specific Identification, so a bridging or abusive Replacement by an externally applied, inductively coupling System is not possible. Advantageously done Here also an encryption or cryptic ciphering of the transponder signal.

Alternatively to a digital signal is also an analogue Signal possible, with z. B. the transponder an analog query signal receives and outputs an analog response signal. The analog response signal can z. B. processed in the primary antenna be, preferably a resistance of the entire unit set depending on the result determined so that the entire unit will fail if the transponder signal changes their resistance.

The alarm glass pane unit according to the invention can be with or be formed without a frame. It can e.g. a frameless Glass door and / or a laminated glass pane with a glass pane and a plastic film applied thereon between which the transponder is arranged with Tertiärantenne. According to one advantageous embodiment is the alarm glass pane unit an insulating glass pane unit with an outer pane, a Inner pane and a space formed between them be, wherein at least the outer pane of the thermal prestressed safety glass is made and on its the intermediate space facing the secondary secondary antenna is attached, and arranged the transponder in the space is. In this case, advantageously, the primary antenna outside be provided of the space.

The primary antennas may be ferrite antennas or rod antenna coils be. They can be connected in series and from one common high-frequency data line are supplied. At a serial circuit is the query of the various transponders about their specific identifiers required, with the query the identifiers then pulsed over a multiplexer. Furthermore, the primary antennas can also be connected in parallel be queried and via separate cables.

The tertiary antenna can carry both a rod and a coil or ferrite antenna. The secondary antenna runs advantageously such that a good coupling with both the Primary and tertiary antenna.

According to the invention, in particular, in addition to the alarm mode also a normal operating mode for checking the alarm glass units e.g. be carried out during the day, in which a closed State of an open state, z. B. tilted, pivoted or deferred alarm glass unit, can be distinguished.

This opening detection can also be performed on systems which have further adjustable components without a glass substrate, e.g. Doors, flaps or hatches with corresponding antenna designs.

Fig. 1a

einen Schnitt durch eine als Isolierglasscheibe ausgebildete Alarmglaseinheit gemäß einer tieferen Temperaturen führen könnte. Zur Erhöhung der mechanischen Stabilität des Verbundes ist auf die nach außen, d.h. in Fig. 3 nach unten, gerichtete Fläche des Butylstranges 4 eine Sekundärdichtung 6 z. B. aus Polysulfid-Kautschuk aufgebracht.

The invention will be explained below with reference to the accompanying drawings of some embodiments, in which:

Fig. 1a

could result in a section through a trained as insulating glass alarm glass unit according to a lower temperatures. To increase the mechanical stability of the composite is on the outward, ie in Fig. 3 down, directed surface of the Butylstranges 4 a secondary seal 6 z. B. applied from polysulfide rubber.

The alarm glass pane unit 1 has according to this embodiment further comprising a circumferential frame 7, through a Glasfalzleiste 8 is closed to the interior. The two glass sheets 2, 3 are by means of an adhesive 13, for. As silicone, glued into the frame 7. In one in the frame 7 formed Glasfalz 9 is a block bridge 10 is inserted on the the glass sheets 2, 3 stand up. In the between block bridge 10 and space 7 formed by frame 7 is an e.g. two-core Radio frequency data line 12 inserted to an alarm center 14 leads.

To the high frequency data line 12 is a primary antenna 22nd connected, the high frequency signals e.g. emits 125 MHz, which serve as interrogation signals. The only symbolically drawn Primary antenna can basically be a ferrite antenna or coil antenna or even a rod antenna. On the inside 16 of the outer pane 2 is designed as a conductor loop Secondary antenna 18 is applied, e.g. screen-printed printed or glued on. From the primary antenna 22 is spaced on the inside 16 of the outer pane 2 a Transponder chip 20 with a preferably designed as a conductor coil Tertiary antenna 21 glued on. The tertiary antenna 21 is in this case sufficiently away from the primary antenna 22, so that she can not pick up a signal from this one. The signal transmission between the primary and tertiary antenna is only through the intervening switched secondary antenna 18 possible. For this purpose, the Transponder chip 20 with tertiary antenna 21 on one of the primary antenna 22 opposite side of the outer pane 2 is provided be, as indicated in Fig. 1a. However, it is also possible that the transponder chip 20 with Tertiärantenne 21 substantially arranged on the same side as the primary antenna 22 However, a signal transmission, however, only on the intermediate secondary antenna 18 is possible. The secondary antenna 18 can span a larger area of the outer pane 2 extend or only in a small area between the tertiary antenna 21 and the primary antenna 22 be, it extends over a sufficiently large Area of the outer pane 2, so they break at the ESG outer pane 2, which is to a substantially complete Crumbling leads, is destroyed, causing the signal transmission interrupted by the alarm center 14 to the transponder chip 20 becomes.

FIGS. 2a, 2b, 2c show advantageous embodiments, in which each Tertiärantenne 21 formed as a coil is and transponder chip 20 and the tertiary antenna 21 in one circular area of the secondary antenna 18 is arranged are, wherein in Fig. 2a, b, the position of the transponder chip 20 and the tertiary antenna 21 is only hinted at. For a good connection to the - not additionally drawn in these embodiments - Primary antenna 22 extends the secondary antenna 18th as in Fig. 2b, c all along the edge of the disc 2 or how in Fig. 2a partially at the edge of the disc. 2

The transponder chip 20 is a passive transponder without its own Energy source. Thus, the energy is only from the alarm center 14 generated, via the radio frequency data line 12, Primary antenna 22 and the secondary antenna 18 as a signal to the Tertiärantenne 21 and thereby passed to the transponder chip 20. In the transponder chip 20 a specific identifier is stored, for processing by the alarm center 14th output signal is used, so that a digital Response signal output from the transponder chip 20 and over the Tertiärantenne 21 and the secondary antenna 18 from as well Receiving device serving primary antenna 22 is received. This signal can also be cryptically encoded. Alternatively to this is also a signal recording via an additional primary receiving antenna possible to send the recorded signal to the alarm center 14 passes.

There are basically different forms of Tertiärantenne 21 possible, e.g. as a closed conductor loop or essentially meandering. The transponder chip 20 with the tertiary antenna 21 may e.g. mounted on an adhesive film be glued to the inside 16 of the glass 2 becomes.

The high-frequency data line 12 can - as shown in Fig. 4 be designed in particular as a bus whose lines 12a, 12b led to several alarm glass pane units 1 along and on each alarm glass pane unit 1 to a primary antenna 22 are connected, which are inductive about the there respectively attached secondary antenna 18 with the Tertiärantenne 21 of the respective Transponder 20 is coupled. Here are serial or parallel circuits of the primary antennas possible. The different Transponder 20 of the alarm glass pane units 1 can via the radio frequency data line 12 and the primary antennas 22 due to the different identifiers of the individual Transponder 20 addressed in the alarm glass pane units 1 become. When recording a signal transmitted as a digital code Thus, each transponder 20 checks whether it is addressed is, and gives - if it is addressed - a corresponding coded output signal. The alarm center 14 can thus through a two-wire radio frequency data line 12 all in each case one or more alarm glass pane units 1 having Check window of a glass facade.

The queries are pulsed at short intervals. So long the transponder 20 of a unit responds is the concerned unit 1 in order. However, if the glass 2 is destroyed or opened, the secondary coil 18 and thus the data transmission between alarm center 14 and transponder 20 interrupted. This can be triggered immediately alarm; where appropriate, a renewed, selective review of the concerned alarm glass pane unit 1 are performed.

In principle, there is also a parallel circuit the primary antennas 22 possible, in which the individual primary antennas in each case a cable runs, which the primary antenna with a reader connects. The primary antennas can also be used in a such arrangement queried about their specific identifiers become.

By the primary antennas 22 outside the respective glass elements misplaced, in addition to a destruction of the Glass pane 2 also tilting or removing the disc. 2 or the entire unit 1 from the discs 2, 3, seals 4, 9, 9 glass rebate and block bridge 10 are determined. Thus, in addition to the alarm mode, where a destruction of the disc 2, even a normal operating mode is possible in which the closed state of the alarm glass pane unit 1 checked is in particular on an opening by tilting, panning or - e.g. with sliding doors - translatory sliding. In normal operating mode can such an opening of a window to a Interruption of the signal or a significant weakening lead due to the greater tilt angle of the signal and than such be recognized.

The transmitted digital signals are advantageously with the identifier stored in the transponder 20 is encrypted to a bridging or replacement of the transponder chip 20 to prevent by externally applied antenna loops.

Claims (20)

Alarm glass pane unit with at least: a pane (2) of thermally toughened safety glass, a primary antenna (22) arranged outside the disk (2) for outputting interrogation signals, a secondary antenna (18) arranged on an inner side (16) of the disc (2) which picks up the interrogation signals output from the primary antenna (22) and forwards them to a tertiary antenna (21) and receives response signals output from the tertiary antenna (21) and to a Outputs primary receive antenna (22), and a passive transponder (20) attached to the disc (2) and connected to the tertiary antenna (21), which receives the interrogation signals via the tertiary antenna (21) and outputs response signals. Alarm glass pane unit according to claim 1, characterized in that the secondary antenna (18) is an on the inside (16) mounted conductor loop which is arranged wholly or partially spatially between the primary antenna (22) and the tertiary antenna (21). Alarm glass pane unit according to claim 1 or 2, characterized in that the interrogation signals and response signals are digital signals and the passive transponder (20) from the interrogation signals in response to a stored identifier forms the output signals and outputs to the Tertiärantenne (21). Alarm glass pane unit according to claim 3, characterized in that the identifier stored in the transponder (20) is a code and the transponder (20) encrypts an incoming interrogation signal and outputs it as an encrypted response signal. Alarm glass pane unit according to one of the preceding claims, characterized in that the primary antenna (22) is also the primary receiving antenna. Alarm glass pane unit according to one of the preceding claims, characterized in that the transponder (20) on the inside (16) of the disc (2) is glued. Alarm glass pane unit according to claim 6, characterized in that the transponder (20) is a transponder chip which is provided with a conductor coil serving as a tertiary antenna (21). Alarm glass pane unit according to one of the preceding claims, characterized in that the primary antenna (22) is arranged below a glass base (10) carrying the pane (2). Alarm glass pane unit according to one of the preceding claims, characterized in that the primary antenna (22) is connected to a high-frequency data line (12). Alarm glass pane unit according to one of the preceding claims, characterized in that
it is an insulating glass pane unit (1),
the pane (2) of toughened safety glass is the outer pane (2),
an inner pane (3) made of glass is provided,
between the discs (2,3), a gap (5) is formed, and
the primary antenna (22) is arranged to output interrogation signals outside the interspace (5). Alarm glass pane unit according to claim 10, characterized in that the primary antenna (22) extends outside of between the glass sheets (2, 3) and an external frame (7) extending seals (4, 6, 13). Alarm glass pane unit according to one of claims 1 to 9, characterized in that
it is a laminated glass,
on the disc (2) of tempered safety glass, a plastic film is applied,
the tertiary antenna and the transponder are mounted between the disc (2) and the plastic film. System composite with several alarm glass pane units (1) according to one or more of the preceding claims, wherein the primary antennas (22) through one of the alarm glass panel units (1) connecting data bus (12) are controlled. System network according to claim 13, characterized in that the primary antennas (22) are connected in series and the transponders (20) of the alarm glass pane units (1) have different stored identifiers. System network according to claim 14, characterized in that the primary antenna (22) are connected to a common alarm center (14) which outputs successive signals for the different transponders (20) of the individual alarm glass pane units (1) and the respective transponder (20) in Respond passively to their specific identifier via their respective tertiary antenna (21), secondary antenna (18) and the common primary antenna (22). System network according to claim 13, characterized in that the primary antennas (22) are connected in parallel and are connected via separate cables to a reading device. System network according to one of claims 13 to 16, characterized in that it additionally comprises at least one alarm unit without a glass substrate, eg a door, with a secondary antenna, a tertiary antenna and a transponder. Method for operating the system network according to one of claims 13 to 17, characterized in that the transponder (20) of the individual alarm glass pane units (1) are controlled by means of bus technology. A method according to claim 18, characterized in that successively the various alarm glass pane units (1) are queried by their different identifiers. A method according to claim 18 or 19, characterized in that the system composite is adjustable
in an alarm mode in which in the absence of a response signal of a transponder (20) of an alarm glass pane unit (1) an alarm signal is output, and
in a normal operating mode, in which, in the absence or weakening of a response signal of a transponder (20) detects an opening of the relevant alarm glass pane unit (1) bearing window and output as an indication signal.

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