DK168255B1

DK168255B1 - Alarm apparatus, preferably in a window structure

Info

Publication number: DK168255B1
Application number: DK616488A
Authority: DK
Inventors: Lars Eriksson
Original assignee: Lars Eriksson
Priority date: 1987-03-06
Filing date: 1988-11-04
Publication date: 1994-02-28
Also published as: NO884912D0; DK616488A; DK616488D0; NO171337C; NO884912L; NO171337B

Description

i DK 168255 B1in DK 168255 B1

Opfindelsen angår en alarmanordning, fortrinsvis ved en vindueskonstruktion med mindst én glasrude.The invention relates to an alarm device, preferably to a window structure having at least one glass pane.

På markedet i dag findes der et antal forskellige metoder 5 til udløsning af en alarmfunktion i forbindelse med en glasrude i en vindueskonstruktion. Alle disse metoder har den ulempe, at der enten kan udløses falske alarmer, eller at det er muligt på en eller anden måde at komme igennem den med alarm forsynede konstruktion uden at ud-10 løse alarmen. Vibrations sensorer giver ofte falske alarmer og føler ikke alle slags vibrationer, hvorfor indbrud kan ske. Elektriske tråde, som er indstøbt i glaspladen, kan kobles ud eller omgås, eller det er muligt at bore små huller mellem trådene og derefter med små, smidige 15 værktøjer at fange attraktive genstande f.eks. i et udstillingsvindue .In the market today there are a number of different methods 5 for triggering an alarm function in connection with a glass pane in a window structure. All of these methods have the disadvantage that either false alarms can be triggered or that it is somehow possible to get through the alarmed construction without triggering the alarm. Vibration sensors often give false alarms and do not feel all kinds of vibrations, which is why burglary can happen. Electrical wires embedded in the glass plate can be disengaged or bypassed, or it is possible to drill small holes between the wires and then with small, flexible tools to catch attractive objects e.g. in a showcase.

Også elektroniske sensorer giver ofte falske alarmer og kan omgås. Ofte kan disse kun anvendes på enkeltruder af 20 float glass typen eller på hærdet glas. Silketrykte kredsløb på kanten af en hærdet glasrude, og som skjules i falsen, kan også anvendes til at udløse en alarm. Der findes her metoder til at omgå alarmen, uden at det hærdede glas granulerer, og det trykte kredsløb brydes der-25 for ikke, hvorved alarmen udebliver. Desuden fungerer denne metode ikke altid ved lamineret glas.Also, electronic sensors often give false alarms and can be bypassed. Often these can only be used on single glazing of the 20 float glass type or on tempered glass. Silk-printed circuits on the edge of a tempered glass pane, which are hidden in the fold, can also be used to trigger an alarm. There are methods of circumventing the alarm here without the hardened glass granulating and the printed circuit is not broken, thereby avoiding the alarm. Furthermore, this method does not always work with laminated glass.

Det er et formål med den foreliggende opfindelse at tilvejebringe en alarmfunktion, som ikke udløses falskt, og 30 som ikke kan forceres med nogen gennembrydningsmetode, uden at alarmen udløses, samtidigt med at alarmen også fungerer på laminerede flerlagskonstruktioner. Det er vigtigt, at alarmfunktionen kombineres med en glaskonstruktion, som det tager lang tid at forcere. Når alarmen 35 udløses ved indbruddets påbegyndelse ved første angrebsforsøg, skal der altså anvendes lang tid og meget arbejde, inden byttet bliver tilgængeligt. Dette kan sædvan- 2 DK 168255 B1 ligvis kun opnås med laminerede flerlagskonstruktioner, og hidtil har der ikke eksisteret nogen tilstrækkelig god alarmindretning til sådanne konstruktioner. Ifølge opfindelsen er det muligt ved hjælp af ultralyd at skabe en 5 løsning på ovennævnte problem. Opfindelsen kendetegn fremgår af patentkravene. Risikoen for falsk alarm er ifølge opfindelsen minimal i de tilfælde, hvor ultralyden udsendes og registreres i den glasrude, som i en kon-' struktion med flere lag glas vender indad mod det rum, 10 som skal beskyttes. Anvendes en lamineret flerlagskonstruktion, er risikoen for falsk alarm endnu mindre, fordi lamineringerne kan isolere ultralyden udelukkende til den inderste glasrude samtidig med, at hver revne, hul eller lignende i glasset direkte udløser alarmen. Natur-15 ligvis kan ultralyd anvendes på andre typer glas, men da opnås ringere funktion.It is an object of the present invention to provide an alarm function which is not triggered falsely and which cannot be forced by any breakthrough method without triggering the alarm, while also operating the alarm on laminated multilayer structures. It is important that the alarm function is combined with a glass structure, which takes a long time to climb. Thus, when the alarm 35 is triggered at the onset of the burglary on the first attack attempt, a long time and much work must be spent before the prey becomes available. This can usually only be achieved with laminated multi-layered structures, and so far no good alarm device for such structures has existed. According to the invention, it is possible to create a solution to the above problem by means of ultrasound. The characteristics of the invention are set forth in the claims. According to the invention, the risk of false alarm is minimal in cases where the ultrasound is emitted and recorded in the glass pane which, in a multi-layered glass structure, faces inwards towards the space to be protected. If a laminated multi-layered structure is used, the risk of false alarm is even less because the laminations can isolate the ultrasound exclusively to the inner glass pane at the same time as each crack, hole or similar in the glass directly triggers the alarm. Of course, ultrasound can be applied to other types of glass, but then poorer performance is achieved.

I det følgende skal opfindelsen beskrives nærmere med henvisning til tegningen, som skematisk viser alarmkon-20 struktionen ifølge opfindelsen monteret i en flerglaskon-struktion.In the following, the invention will be described in more detail with reference to the drawing, which schematically shows the alarm structure according to the invention mounted in a multi-glass structure.

På tegningen vises en vindueskonstruktion omfattende tre glasruder 1, 2 og 3, hvilke holdes sammen af to laminat-25 lag 4 og 5. En ultralydsender 6 er monteret på et første sted fortrinsvis på den inderste glasrude 1, dvs. på indersiden 10 af vindueskonstruktionen, og så den ligger indlejret i laminatlaget 4, som grænser til den inderste glasrude 1, hvorved senderen 6 med en af sine overflader 30 fortrinsvis direkte ligger an mod selve overfladen af glasruden 1. En modtager 7 for den i glasruden 1 udsendte ultralyd er monteret på et andet sted mod glasruden 1 til registrering af impulser, som modtages fra glasruden 1.In the drawing, a window structure is shown comprising three glass panes 1, 2 and 3 which are held together by two laminate layers 4 and 5. An ultrasonic transmitter 6 is mounted in a first position preferably on the inner glass pan 1, ie. on the inside 10 of the window structure, and so it is embedded in the laminate layer 4 adjacent the inner glass pane 1, whereby the transmitter 6, with one of its surfaces 30, preferably directly abuts the actual surface of the glass pane 1. A receiver 7 for the glass pane 1, the ultrasound emitted is mounted at another location against the glass pane 1 for recording pulses received from the glass pane 1.

Et alarmapparat, som ikke er vist på tegningen, er for-35 bundet med modtageren 7 via tilslutningskabler 9, og senderen 6 er via tilslutningskabler 8 forbundet med en passende energikilde, som ikke er vist på tegningen. Vin- DK 168255 B1 3 dueskonstruktionen er monteret i en glasfals 11 på konventionel måde. Modtageren 7 kan også anbringes i laminatet 4 op ad den indvendige glasrude 1 i afstand fra senderen 6, og da passende i et område af glasruden 1, som 5 befinder sig i glasfalsen 11.An alarm device not shown in the drawing is connected to the receiver 7 via connection cables 9 and the transmitter 6 is connected via connection cables 8 to a suitable source of energy not shown in the drawing. The wine pigeon structure is mounted in a glass case 11 in a conventional manner. The receiver 7 may also be placed in the laminate 4 up to the inner glass pane 1 at a distance from the transmitter 6, and then suitably in an area of the glass pane 1 which 5 is in the glass case 11.

Senderen 6 kan sende ultralyd med en hemmelig pulsation, så den ikke kan omgås, og senderen kan være af piezo-kry-staltypen. Senderen 6 anbringes passende, så kun ét glas-10 lag udsættes for ultralyd, hvis der anvendes en vindueskonstruktion med flere laminerede lag. Anvendes kun et glaslag, øges risikoen for falsk alarm. Placering af modtageren 7 på glasruden 1 bør vælges, så der opnås den bedst mulige registrering af ultralydsignalet i glasruden 15 1, og modtageren bør anbringes i passende afstand fra senderen 6. Glassets egenskaber, størrelse, tykkelse, modstand, impedans etc. gør, at ultralyden, som udsendes fra senderen 6, modtages på en bestemt måde i modtageren 7. Det er naturligvis også muligt at anvende to eller 20 flere sendere 6 såvel som to eller flere modtagere 7 på valgfrie glaslag, hvor det er nødvendigt.The transmitter 6 can transmit ultrasound with a secret pulsation so that it cannot be bypassed and the transmitter may be of the piezo crystal type. The transmitter 6 is suitably placed so that only one glass-10 layer is subjected to ultrasound if a window structure with multiple laminated layers is used. Using only a glass layer increases the risk of false alarms. The position of the receiver 7 on the glass pane 1 should be chosen so as to obtain the best possible registration of the ultrasonic signal in the glass pane 15 1 and the receiver should be placed at a suitable distance from the transmitter 6. The characteristics, size, thickness, resistance, impedance etc. of the glass The ultrasound emitted from the transmitter 6 is received in a particular way in the receiver 7. It is of course also possible to use two or 20 more transmitters 6 as well as two or more receivers 7 on optional glass layers where necessary.

Hvis glasset beskadiges, f.eks. ved hulboring, brud eller lignende, registreres i modtageren 7, at der er sket en 25 ændring i de modtagne impulser, f.eks. i form af forøgelse eller formindskelse af frekvensen. Det er muligt i den elektronik, som styrer processerne i senderen 6 og i modtageren 7, at indlægge en tidsfaktor, så forandringer, der sker i glassets impedans på grund af den ydre påvirk-30 ning, har længere tid, end hvad en tilsigtet skade tager i tid, hvorved risikoen for falsk alarm reduceres. Det beskrevne system fungerer dog bedst sammen med andre glas- og plastlag i en laminatkonstruktion. Her sidder senderen 6 fortrinsvis tæt fastgjort til det inderste 35 glaslag 1 for bedst muligt at sende ultralyd gennem glasset 1. Laminatlaget 4 omslutter også senderkrystallen, så ultralyden i mindst muligt omfang kan trænge ind i de yd- 4 DK 168255 B1 re glaslag 2 og 3. Herved begrænses risikoen for falsk alarm til et minimum, fordi den ydre påvirkning ikke formår at påvirke impedansen i den inderste glasrude 1. Billedligt kan systemet sammenlignes med et svømmebassin, 5 hvor en sender laver bølger i vandet. Bølgerne kastes tilbage af vægge, bund, hjørner osv. og skaber en bestemt bølgesituation afhængig af modstanden i vandet, vægge osv., således at man kan tale om bassinets impedans. Anbringes en genstand i vandet, ændres hele bølgemøn-10 stret, hvilket registreres af modtageren eller modtagerne. Ændringen udløser så alarmen. Hvis bassinet via en kanal løber over til et andet bassin, kan ændringen påvirke det indre bassin, så en alarm udløses.If the glass is damaged, e.g. by hole drilling, fracture or the like, it is recorded in the receiver 7 that there has been a change in the received pulses, e.g. in the form of increasing or decreasing the frequency. It is possible in the electronics that control the processes in the transmitter 6 and in the receiver 7 to insert a time factor so that changes which occur in the impedance of the glass due to the external influence have a longer time than what an intended damage takes time, thereby reducing the risk of false alarms. However, the described system works best with other glass and plastic layers in a laminate construction. Here, the transmitter 6 is preferably sealed tightly to the innermost glass layer 1 to best transmit ultrasound through the glass 1. The laminate layer 4 also encloses the transmitter crystal so that the ultrasound can penetrate to the outer glass layer 2 and to the least possible extent. 3. This minimizes the risk of false alarms because the external influence is unable to affect the impedance of the inner glass pane 1. Picturally, the system can be compared to a swimming pool, 5 where a transmitter makes waves in the water. The waves are thrown back by walls, bottoms, corners, etc. and create a certain wave situation depending on the resistance in the water, walls, etc., so that one can talk about the impedance of the basin. When an object is placed in the water, the entire wave pattern is changed, which is recorded by the receiver or receivers. The change then triggers the alarm. If the basin overflows from one channel to another basin, the change can affect the inner basin, triggering an alarm.

15 Med en glasrude er det tilstrækkeligt, at man lægger en hånd mod ruden, for at udløse en falsk alarm. Naturligvis kan elektronikken afhjælpe dette fænomen, ved at man justerer tidsfaktoren opad eller nedad. I en lamineret konstruktion påvirker det ydre glaslag 3 ikke alarmen, hvis 20 der lægges en hånd på glasset, som det er tilfældet med blot en enkelt glasrude, hvorfor falske alarmer i praksis udelukkes helt. Enhver revne, hul eller lignende i glaskonstruktionen udløser dog alarmen.15 With a glass pane it is sufficient to place a hand against the pane to trigger a false alarm. Of course, the electronics can remedy this phenomenon by adjusting the time factor up or down. In a laminated construction, the outer glass layer 3 does not affect the alarm if a hand is placed on the glass, as is the case with just a single glass pane, so false alarms are practically excluded completely. However, any crack, hole or similar in the glass structure triggers the alarm.

25 Elektronikken kan også kombineres med andre detekteringsmønstre end ultralyd for yderligere at forbedre alarmens funktion.25 The electronics can also be combined with detection patterns other than ultrasound to further improve alarm performance.

En sender 6 eller en modtager 7 kan også anbringes på 30 kanten eller den korte side af glasset 1 eller glassene 2 og 3.A transmitter 6 or receiver 7 may also be placed on the edge or short side of glass 1 or glasses 2 and 3.

Den benyttede ultralyd kan naturligvis også erstattes af impulser af en anden slags, som kan sendes og modtages 35 ved hjælp af mindst én glasrude i en vindueskonstruktion eller af et lignende skiveformet element.The ultrasound used can, of course, also be replaced by impulses of a different kind which can be transmitted and received by at least one glass pane in a window structure or by a similar disc-shaped element.

DK 168255 B1 5DK 168255 B1 5

En anden tænkelig placering af sender 6 og modtager 7 er i vindueskonstruktionens hjørnepartier i glasfalsen 11, hvorved impulserne sendes diagonalt over den aktuelle glasrude. Afhængig af, hvilken tykkelse sender 6 og mod-5 tager 7 har, kan f.eks. ved anvendelse af tre lag glas det ene yderlags hjørner skæres af, så sender og modtager, kan være tykkere end det benyttede laminatlag, samtidig med at denne afskæring ligger inden for falsbredden, så sender og modtager dels ligger beskyttede i falsen 11, og 10 dels skjules af denne.Another conceivable location of transmitter 6 and receiver 7 is in the corner portions of the window structure in the glass rim 11, whereby the pulses are sent diagonally across the actual glass pane. Depending on the thickness of transmitter 6 and receiver 5 has 7, e.g. by using three layers of glass one corner of the outer layer can be cut so that the transmitter and receiver can be thicker than the laminate layer used, while this cut is within the fold width, so that the transmitter and receiver are protected in the seam 11 and 10 partly is hidden by this one.

15 20 25 30 3515 20 25 30 35

Claims

An alarm device, preferably by a window structure 5 and comprising at least one transmitter (6) for pulses, e.g. an ultrasound, which transmitter is mounted in a first location on at least one glass pane included in the window structure or a similar disc-shaped element (1-3) so that the glass pane can be exposed to the pulses, and at least one receiver (7) from the transmitter ( 6) pulses transmitted in the glass pane, which receiver is mounted at another location on the glass pane at a distance from the transmitter (6) for recording pulses received from the glass pane, whereby an alarm coupled to the receiver (7) is actuated when the pulses have such values. , such as. is caused by crushing the pane, characterized in that the glass pane comprises a glass layer (1-3) forming part of a laminated structure (1-5) and the transmitter (6) and the receiver (7) are fixed to an intermediate glass pane ( 2) edge or on one side of the glass panes (1-3) facing another glazing (1-3) included in the structure (1-5).

Alarm device according to claim 1, characterized in that the glass pane is the inner glass (1) of the laminated structure (1-5).

Alarm device according to claims 1-2, characterized in that both the transmitter (6) and the receiver (7) for the pulses are mounted in a region of a glass layer included in the structure (1-5) 30, which area is in a socket. (11), which carries the window structure. 35