DE19719335B4 - Arrangement for monitoring rooms, buildings and / or grounds - Google Patents

Abstract

Circuit, on an I / O card for use in an array to monitor rooms buildings and / or terrain, where a PC is connected to at least one sensor via a plug-in card is, characterized in that the circuit comprises three AND gates (9, 10, 11), of which an AND gate (9) with the address memory of the PC (2) and the other two AND gates (10, 11) with signal generators for enable signals in the PC (2) are connected, wherein by the enable signals inputs (12) and outputs (13) for the Signal flow from the PC (2) to at least one sensor (5) or from at least one sensor (5) to the PC (2) are released.

Description

The The invention relates to a circuit located on an I / O card is, for use in an arrangement for monitoring rooms, buildings and / or Terrains. The term "monitoring" is intended to encompass the recording of changes, the notification of such changes (alarm triggering), the Registration of changes and the control of operations to prevent damage from the changes.

As is known, such arrangements of the safety technology consist of central systems produced for the respective specific purpose, with which decentralized signal receivers are connected, see, for example, US Pat. B. DE 195 17 037 A1 , Several such systems can be managed by a further alarm center according to a hierarchical principle. The number of connectable to a central signal sensor or sensors is limited in practice more or less. Also, a logical combination of sensor signals to derive knowledge about the security situation is possible only with a partially considerable additional effort. Furthermore, a solution is known in which a computer has all the functions of an alarm center, see DE 296 10 467 U1 , A plug-in card with its own dedicated processor (INTEL 82C55A) is located at the interface between a personal computer (PC and the sensors, this card feeds the data from the sensors into the PC. and software complexity and their greater susceptibility to failure and arises from the additional processor installed on the plug-in card.It is necessary to initialize the plug-in card with a specified processor which requires special knowledge.

Known are also read-write memory (RAM), where by default each an address data stored and read out under this again can be see U. Tietze, Ch. Schenk; "Semiconductor- Circuit Design "; Tenth Edition, Springer-Verlag Berlin Heidelberg New York London Paris Tokyo Hong Kong Barcelona Budapest 1993, page 273 f. at this is possible through the effect of an additional logical link connect the data input to the data output and thus the data transfer in both directions to make one and the same line.

task The invention is now an arrangement for monitoring rooms, buildings and / or campuses not just using a simple PC as the central office, but the above addition to the interface of the PC for sensor connection only one Plug-in card without specified processor needed.

According to the invention This object is achieved by the characterizing features of the first claim solved. This eliminates the relatively high technical effort, the need additional Programming and the associated higher susceptibility to interference. Also, the arrangement of the invention not bound to the use of a particular computer. By the invention comes as a central unit, as an alarm center, a PC is used, which benefits with an autonomous power supply for the Case of accidental or intentional Power failure equipped and by a mechanical encapsulation from harmful influences of Outside protected is. The one preferably at the interface between the PC and the sensors or signalers located input / output card (I / O card) decodes from the address space of the PC a special, freely selectable I / O address out. From this address, a release signal is generated using the PC. The PC also defines I / O-Read resp. I / O-Write the direction of the signal flow. To adapt the different electrical level of each sensor / alarm to the Signal processing necessary transistor logic level (TTL level) can special Signal conditioning circuits may be provided which are known per se are and can be arranged on their own stock cards. Are advantageous However, they are arranged on the I / O card. To the I / O card is beneficial the data bus of the PC is connected, the I / O card is plugged in one Slot of the PC. The output of a signal or a sequence of signals the sensors or alarms and the receipt of signals, which contain the status symbols of the sensors / alarms takes place advantageous with the aid of a bidirectional line driver, for example. One Gates, which is also provided on the I / O card.

The Using a PC as an alarm center creates the technical requirements for the Use of video or audio surveillance technology. the Prior art corresponding special systems are not necessary. Cameras can via video cards or connect the parallel port to the PC. The PC also allows the storage of the resulting video or audio data, so that consuming accessories for this Purposes can be omitted. An image transmission via modem or Radiotelephone is possible and by influence on the wire telephone network not preventable.

The use of the PC as an alarm center offers the possibility to use modern alarm devices, such as radio telephones, radio transmitters or pagers, without significant additional effort. Particularly noteworthy here are the positive possibilities that the use of pagers on the receiver side and the combination modem / radiotelephone module on the transmitter side in the PC creates; namely, it is ensured that an alarm can reach the operator of the arrangement according to the invention at any location, even without a phone.

Of the PC can by the inventive arrangement with minor ones changes for further monitoring tasks, like home appliance controls, Access control and time recording are used. The Interconnection of the monitored Units with a PC is known and needs no special Expenditure. This is eliminated the usual usage in this area of application special bus systems, for example the European Installation Bus or others who are not very flexible due to their special training and are expensive.

The Invention will be described below with reference to the schematic drawing of embodiment explained in more detail. It demonstrate:

1 a block diagram of an inventive arrangement and

2 the circuit of an I / O card.

In 1 comprises an arrangement according to the invention 1 a PC 2 with an I / O card 3 , which correspond to the number of lines 4 to detectors / actuators 5 an equal number of signal conditioning circuits 6 having. These signal conditioning circuits 6 can also access the I / O card 3 be integrated. On the other hand, to the PC 2 a modem 7 as well as a battery 8th connected. The modem 7 allows the connection of an alarm signal to a telephone, radio or pager network via a wireless telephone module, not shown. The battery 8th ensures an uninterruptible power supply.

In 2 indicates the circuit of an I / O card 3 AND gates 9 . 10 . 11 on, of which the AND gate 9 with the address memory and the AND gates 10 . 11 with signal generators for the release signals in the PC 2 are connected. According to the release signals, this will be inputs 12 and outputs 13 as bidirectional line drivers for signal flow to and from the sensors 5 Approved. The I / O card 3 is to the 8bit data bus 14 of the PC 2 connected.

1

arrangement

2

personal computer (PC)

3

I / O Card (I / O card)

4

cables

5

Detectors / actuators

6

Signal conditioning circuits

7

modem

8th

battery pack

9,10,11

AND gates

12

inputs

13

outputs

14

bus

Claims (3)

Circuit, located on an I / O card, for use in a system for monitoring rooms, buildings and / or grounds, in which a PC is connected to at least one sensor via a plug-in card, characterized in that the circuit has three AND Links ( 9 . 10 . 11 ), of which an AND gate ( 9 ) with the address memory of the PC ( 2 ) and the two other AND elements ( 10 . 11 ) with signal generators for release signals in the PC ( 2 ) are connected, whereby by the enable signals inputs ( 12 ) and outputs ( 13 ) for the signal flow from the PC ( 2 ) to at least one sensor ( 5 ) or at least one sensor ( 5 ) to the PC ( 2 ) are released. Circuit according to Claim 1, characterized in that the I / O card ( 3 ) to the data bus ( 14 ) of the PC ( 2 ) connected. Circuit according to at least one of the preceding claims, characterized in that the I / O card ( 3 ) contains a bidirectional line driver.