Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
  • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
  • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
  • G08B25/085—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines using central distribution transmission lines
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/22—Electrical actuation

Definitions

• Electronic security system preferably to protect homes that are equipped with cable television connections
• the invention relates to an electronic security system, preferably for the protection of dwellings, the protected space of which is equipped with a control center, to which a device for actuating the control center and at least one sensor is connected, and which via a cable line of cable television to one Central control panel is connected.
• Security systems are known which are used to protect groups of rooms, for example apartments, against burglary, fire, gas escapes. serve.
• Known security systems of this type consist of elements which are located in the protected space, of connecting elements and a central control panel.
• an electronic center connected to the central control desk, ie an evaluation device to which various sensors and an actuating element are connected, the actuating element being designed to evaluate the authorization of the person to enter the protected space and, if necessary, to enable setting of new access conditions.
• the control center can be equipped with a reserve power source and / or with a siren.
• the sensors are essentially loops with a binary output - switched on / off.
• the binary information is sent from the sensor to the control center via a cable or by radio transmission.
• the central unit has the task of evaluating the position of the sensors and the information coming from the actuating device and then sending an alarm signal or other information to the central control panel or switching on the siren.
• the actuating element of the control center receives identification information from the person to be entered. This information is located in a mechanical, magnetic or electronic key or is fed to the system by a keyboard operated by this person. In addition, new conditions for access to the protected room can be set, usually using the keyboard.
• a timer in the control center is switched on, for example by a magnetic sensor, and the person entering has to switch off the system in a set time, be it with their key or the keyboard. Otherwise, attack of the protected area is signaled.
• the person is usually made aware by an acoustic or light signal that the time is running out.
• the information from the central apartment unit is fed to the central control console via its own separate telephone line in a binary form or via ordinary telephone lines, likewise as Binary information in the frequency band over the frequency of the telephone calls, or in a digital form in the frequency band of the calls, as complete alphanumeric information.
• a disadvantage of systems with separate telephone lines and those that use the frequency band of the telephone calls is that they are relatively easy to attack.
• One of the biggest disadvantages of the security system with information transmission in the frequency band above the conversation frequency is that the signal only goes through a single telephone exchange. If, in addition, a house control center or another communal control center was switched on within the line, the connection could not be established at all.
• the establishment of separate telephone lines is very expensive; Mass use of ordinary telephone lines is out of the question in municipalities that are not sufficiently telephoned.
• Security systems are known in which the information is fed from the central apartment unit to the central control panel via cable television lines.
• the standard centers in individually protected dwellings are periodically polled by the central control panel, and these transmit them to the control panel with a periodicity of approximately 6s. Information about their status.
• a disadvantage of the known security systems, which use cable television lines for the transmission of information, is that they can be easily attacked because the protected object cannot be monitored between queries by the central control panel, which offers the opportunity for the connection of an emulator.
• the system is secured against misuse of access authorizations.
• the system is sufficiently variable to offer a desired comfort according to the social status of the users.
• the known systems have the disadvantage that they do not meet at least one of the above requirements: the condition of accessibility is fulfilled in the systems operated with a mechanical or electronic key, but systems with a mechanical key are If the key is lost, systems with an electronic key are unaffordable for broad layers because of their high purchase costs.
• the invention is therefore based on the object of providing a security system which meets all the conditions for mass use in residential areas.
• an electronic security system is provided, preferably for the protection of apartments, the protected space of which is equipped with a control center, to which a device for actuating the control center and at least one sensor are connected, and which are connected via a cable of the cable television is connected to a central control console, the control center being, apart from the zero state, at least one radio-frequency-generating code recognition processor, and the device for actuating the control center being a device for reading chip cards.
• the code recognition processor generates, apart from the zero state, high frequency of two different oscillation numbers.
• a group decoder for decoding the frequency spectrum generated by the code recognition processors is switched between a group of identification processors and the central control panel.
• a power supply source and / or a backup power supply source is connected to the code recognition processor. Then at least one active sensor and / or a code keyboard can be connected to the code recognition processor.
• the code recognition processors and the central control panel are advantageously equipped with modems for two-way communication. Outputs of apartment measuring and control devices can be connected to the code recognition processor.
• the system in addition to the safety function, the system also fulfills a number of additional information and control functions. Description of the pictures
• 1 is a block circuit for the basic design of the security system
• FIG. 3 shows a block circuit for the system equipped with modems, a power supply source, a backup power supply source, an active sensor and an actuation keyboard being connected to one of the code recognition processors.
• the basic version of the security system consists of code recognition processors 1, which are connected to the apartment connections 2 leading to televisions.
• Devices 4_ for reading cards with integrated chips are connected to the code recognition processors 1. or, if appropriate, these are a direct component of the code recognition processors 1.
• a passive sensor j5 is also connected to the code recognition processor 1. and is attached in the area of the entrance door of the apartment .
• Apartment television connections 2 are connected to the transmission center 8 by means of a standard television translator 6 and branches 1_ of the distribution cable network . connected to the cable television.
• a central control panel 9_ is connected to it - a computer subsystem for monitoring the protected rooms and for processing the alarm and technical information coming from there. Permanent service at the central control panel 9> is required.
• the code recognition processor 1 is located behind the entrance door inside the protected room.
• a magnetic switch mounted in the entrance door can be used as a passive sensor 5.
• the code recognition processor 1. outputs a signal of frequency A in the cable television network.
• the sensor 5 starts a timer in the code recognition processor 1.
• the code recognition processor changes the number of oscillations from A to B.
• the code recognition processor stops to emit.
• the zero frequency means an alarm condition.
• the maximum number of apartments to be included in the system is limited to 1024 by the transmission capacity of the system.
• an extended security system according to FIG. 2 was designed, which is used in the area of television translators ⁇ _ group decoder , 10. has.
• the group decoder OK. emit their own frequencies. Its task is to analyze the frequency spectrum transmitted by the associated code recognition processors 1, the change in the frequency levels A, B and 0 of each processor 1 changing the own frequency of the group decoder, which is registered in the central control panel £. At the same time, the group decoder switches through the code recognition processor 1 concerned with the central control panel 9_, and thus ensures that changes are registered in the home.
• the basic equipment of the apartment which consists of a code recognition processor 1 with a device 4_ for reading cards with an integrated chip and a passive sensor 5 in the entrance door .
• This equipment can only fulfill the basic safety function.
• the system allows additional equipment to be installed in individual apartments at the owner's request, which can be connected to the proposed system by means of a standard control center. This increases user comfort.
• the code recognition processors can be connected to a current source 1_1, which enables the installation of active sensors 12 connected through the processor 1.
• a backup power source 1 is installed. After this has been exhausted, the code recognition processor 1 switches to position 0 and the central control panel 9_ detects an attack state.
• the current source .11 furthermore enables a code keyboard 14 to be connected to the processor 1. Access conditions can be changed directly by the apartment owner.
• the configurations of the invention already described make only one-sided data transmission possible, uz from code recognition processors 1. to the central control panel 9_.
• This compact security system according to FIG. 3 enables the central control panel 9 to differentiate the type of the reported fault and, on the other hand, regulatory attacks in individual apartments can be carried out directly at the central control panel 9_, for example air temperature or humidity regulation.
• the two-sided data transmission runs with oscillation numbers from 5 to 29 MHz.
• the security system is characterized by a relatively high resistance to attack. If an attempt is made to replace the missing number of oscillations with its emulation, a slight interruption before the emulator is switched on is sufficient, and the central control panel £ perceives the attack and determines the object under attack. In the event of a mains voltage failure, the functionality of the elementary system is retained. In the apartments in which the control center is connected to a power source ri, the backup power source becomes the source of a power failure .13. switched on. After the replacement source 1 has been exhausted, the central control panel perceives a change in the state of equilibrium.
• the user reports the loss to the operator at the central control desk 9, and the latter sets a changed code in the code recognition processor 1 of the apartment in question. If the apartment is equipped with a r4 code keyboard, even the user can - solve
• the security system allows individual points of the system, even the neighboring ones, to have very different configurations - from the elementary to the complete one.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Alarm Systems (AREA)
• Selective Calling Equipment (AREA)
• Burglar Alarm Systems (AREA)
• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)
• Protection Of Static Devices (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=5465334

Family Applications (1)

Country Status (7)

Cited By (1)

Citations (4)

• 1994
  • 1994-10-27 CZ CZ942648A patent/CZ264894A3/cs not_active IP Right Cessation
• 1995
  • 1995-10-24 PL PL95319879A patent/PL178734B1/pl unknown
  • 1995-10-24 WO PCT/CZ1995/000023 patent/WO1996013820A1/de active IP Right Grant
  • 1995-10-24 AT AT95934038T patent/ATE179539T1/de not_active IP Right Cessation
  • 1995-10-24 EP EP95934038A patent/EP0796483B1/de not_active Expired - Lifetime
  • 1995-10-24 DE DE59505796T patent/DE59505796D1/de not_active Expired - Fee Related
  • 1995-10-24 SK SK540-97A patent/SK282912B6/sk unknown

Patent Citations (4)

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