DE19811197A1

DE19811197A1 - Visitor video monitoring system for multi-storey dwellings

Info

Publication number: DE19811197A1
Application number: DE1998111197
Authority: DE
Inventors: Olexy Pshemetsky
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-09
Filing date: 1998-03-09
Publication date: 1999-09-30
Also published as: DE29904712U1

Abstract

The system has several image reproduction equipments and at least one video camera (6) installed at a building entrance. A time switch (5) is connected in parallel with a conventional bell system for several separately operated bells. When a bell push button (3) is operated the time switch activates a camera and a UHF switch (7) which converts the low frequency video camera signal into a high frequency signal and feeds it into the building's cable television network, so that the image acquired by the camera is visible on a switched on television (9).

Description

Praktisch in allen heute zur Anwendung kommenden Videoüberwachungssystemen wird die so genannte "Video-2-Draht-Technologie" angewandt, um Bild- und Tonsignale von der Überwachungskamera unmittelbar zum Bildschirm zu übertragen. Das macht solche Systeme in mehrgeschossigen Wohnhäusern praktisch unanwendbar, da ihre Installation, Einrichtung und anschließende Wartung mit ungerechtfertigt hohen Kosten verbunden ist.This is practically the case in all video surveillance systems used today called "video 2-wire technology" applied to video and audio signals from the surveillance camera directly to the screen. This is what such systems do in multi-storey houses practically inapplicable because their installation, setup and subsequent maintenance are unjustified is associated with high costs.

Das hiermit angebotene System gestattet es, den Installations- und Einrichtungsprozeß maximal zu vereinfachen und die Kosten dafür entsprechend zu senken, und da das gesamte System in Form von frei austauschbaren Blöcken an einem Ort installiert wird, wirkt sich diese Vereinfachung und Kostensenkung auch auf die anschließende Wartung solcher Systeme in den einzelnen Aufgängen von Wohnhäusern aus. Hierfür genügt es, nach der Installation der Anlage ein kleines Stück Koaxialkabel mit einem Widerstand von 75 Ohm zur nächsten Stelle zu verlegen, an der das öffentliche Fernsehsystem des Hauses anliegt und somit praktisch einen Fernsehkanal hinzuzufügen, auf den alle Fernsehgeräte im Hausaufgang eingestellt werden können.The system offered here allows the installation and setup process to be maximized simplify and lower the costs accordingly, and since the whole system in the form of free replaceable blocks installed in one place, this simplifies and reduces costs also on the subsequent maintenance of such systems in the individual stairways of residential buildings. For this it is sufficient to install a small piece of coaxial cable with a resistance of 75 ohms to the next place where the public television system of the house is connected and thus practically add a TV channel to which all TVs in the house entrance are set can.

How the system works

Aus dem unter 1.1. aufgeführten Schema ist ersichtlich, auf welche Art und Weise der Strom beim Betätigen eines der Klingelknöpfe gleichzeitig mit der Haustürklingel (2) auf die Videoüberwachungsanlage (5, 6, 7) geleitet wird, wobei die Dioden (4) zur Vermeidung eines Kurzschlusses der anderen Klingelknöpfe im Moment der Betätigung eines von ihnen dienen. Durch die Herstellung der Dioden in Form von frei herausnehmbaren Chips erhalten wir die Möglichkeit, die defekten Dioden leicht auszutauschen und außerdem die Anlage von den Klingel knöpfen zu trennen, die zu derzeitig leerstehenden Wohnungen gehören oder zu Wohnungen, deren Mieter lange Zeit nicht für die Nutzung des Systems bezahlen.From the under 1.1. The diagram shown shows how the current is directed to the video surveillance system ( 5 , 6 , 7 ) simultaneously with the doorbell bell ( 2 ) when one of the bell buttons is pressed, the diodes ( 4 ) being used to avoid short-circuiting the other bell buttons serve one of them at the moment of actuation. By producing the diodes in the form of freely removable chips, we have the opportunity to easily replace the defective diodes and also to separate the system from the bell buttons that belong to currently vacant apartments or to apartments whose tenants have not been used for a long time of the system.

- The timing relay ( 5 ) is used to switch on the system for the specific period of time that is required to switch on the television, to search for the required channel and to not rush to observe the visitor. The system then switches off automatically, which serves to extend the operating time and save energy. The timing relay simultaneously conducts the current to the video camera ( 6 ) and the UHF crossover ( 7 ), which the low-frequency signal of the video camera in one of the channels 30 . . . 40 corresponding high-frequency signal is converted and passed on to the community television system of the house. The frequency of the transmitted signal can be regulated, which means that several cameras can be connected to a mains cable in different house entrances.
- The filter ( 11 ) prevents the transmission of the video signal via the cable of the public television into the ether with the help of the antenna vibrators and can be used to prevent the signal transport into the system of the cable television or between the individual staircases of the same house.

Claims

1. The transmission principle of a high-frequency video signal from the surveillance camera in the communal TV system of the house to ensure its additional function as Video surveillance system.

2. The visitor video surveillance system, which uses the transmission of a Radio frequency video signal from the surveillance camera into the communal television system works - as a whole.