DE19743137A1 - Security and warning system for civil and military applications - Google Patents

Abstract

A surveillance system for military or civilian application is used to monitor a defined area and to identify unauthorised entry. A number of sensor stations are located at strategic points. These may use a range of technologies , such as optical, infra red, acoustic. The sensors connect with transmitters that relay data to a central control system via radio, light or cable.

Description

DETECTUS means the widely automated and intelligent, optical-acoustic monitoring of border areas, civil and military Restricted areas, as well as endangered objects of any Art.

DETECTUS selects and reports day and night under all conceivable metereological conditions independently and specifically suspicious or opposing movements and enables them precise location.

For example, with this system, the number operational security and security personnel drastically be reduced - including the usual routine patrols and patrols or Rides.

The selection made means the Exclusion of normal environmental conditions and related refer only to reportable events. This is experienced special rating for bad or extreme Weather conditions. Emergency services only have to move to the location of the event.

Via the networking of the individual sensor systems can also do distracting or sham maneuvers be recognized quickly.

DETECTUS is quick and easy to assemble and disassemble. The compact design also allows a quick installation, for example at Troops in crisis areas.  

construction

DETECTUS is divided into four main areas:

• - Networked sensor systems on site with Selection and pre-evaluation;
• - Redundant data transmission path;
• - Central evaluation station;
• - evaluation software.

The rough selection between reportable Alarm events and natural or everyday Movement processes take place on site. The Signals are sent from the sensor box to the Evaluation station transmitted and there summarized.

The operating staff in the central Monitoring station is interpreted with the Signals or natural background movements not burdened. Only with the highest probability Solve atypical and closely observed processes in the evaluation station alarm off and then enable targeted location and tracking.

A continuous and tiring for the staff continuous monitoring of monitors is eliminated - and thus the monotony as human Source of error.

DETECTUS distinguishes, for example, in one otherwise obscure forested and with Shrubbery passed border section between normal game change and illegal border crossing.  

Examples of use Border surveillance

The "green borders" lead particularly to the east to a stream of illegal immigration. Tractor gangs use lonely and confusing terrain, especially at Darkness and bad weather, for illegal Border crossing.

The frightening numbers or the extent of the this way came to Germany Mock asylum seekers, economic refugees and people with high criminal energy are sufficient known.

DETECTUS enables the detection of these Movements and targeted operational management of the Border guards. Routine, in part burdensome patrol services are largely superfluous - without restricting the security situation be reduced to a minimum.

Nuclear facilities

The dispute over nuclear energy will managed increasingly violently. Actions against Facilities such as nuclear power plants, nuclear Interim storage facilities and their access routes increase.

The goal of the anti-nuclear power movement is in particular, the required number of backup and Police forces around these facilities  selectively bind violent actions to to create space for other disruptive groups.

In addition to the normal backup DETECTUS in large demonstrations by the extensive closed surveillance with available documentation an outstanding Police support.

Radio towers

The comprehensive expansion of the mobile network requires a relatively dense assembly of the Federal Republic of Germany with radio towers as Relay stations. These are on the flat land Radio masts mostly positioned lonely. this is also valid for the systems along the highways.

These towers are analogous to nuclear facilities increasingly targets militants, more hostile to technology Groups. Attacks have already been recorded.

DETECTUS enables an optimal one All-round monitoring of each individual relay station.

Military objects

Early warning systems, air defense positions, ammunition and Vehicle depots, not least barracks are often located in remote areas. Same thing applies to air bases and airfields.

Operations in crisis areas require fast Structure and comprehensive backup of Operations bases in a foreign environment. Through its DETECTUS also fulfills the compact design High mobility requirement.  

functionality sensor

The DETECTUS sensor section contains a combined system of normal optics, pyroelectric detector, directional microphone as well Selection and evaluation module. All recorded signals are digitized.

positioning

The compact sensor box is installed at a height according to the area of the monitored area Environment and the necessary perspective judges. Existing ones are suitable for this Facilities such as antenna masts, electricity and Light poles or exposed parts of the building. Outdoors A tubular steel mast is required on site.

The sensor box is powered either self-sufficient via a solar panel with buffer battery or via cable. External power supply should only enclosed within a closed Restricted area. Both types of Power supply can be combined.

There are several sensor boxes in one section positioned is an overlap of the sectors advantageous. Adjacent sensors verify the Alert notification and facilitate localization.

Outside closed areas, in open area the sensor mast may be sabotaged by endangered backwards. This can be done by Multiple placement of the sensor box excluded which are then all-round detection, but at least also backward scanning enables.  

recognition

An area of, for example, 4 square kilometers will be first recorded as a still image, digitized in binary and stored as a reference file in the central computer.

For this purpose, the area to be monitored is scanned. A grid area of, for example, 0.25 square meters corresponds to one pixel. Every pixel will assigned a certain intensity. The image of the site or the creation of the file is for designed all three detection methods.

With one byte per pixel and the named The area of 4 sq. Km is a 16 Mbyte computer required. The creation of the "freeze frame" or the reference file is taken over by the system independently and requires little effort.

For this purpose, the site may be used for short Keep time free from unwanted movements and scanned.

After activation, the sensor scans continuously its sector. For every run an image is created again as file DAT i, DAT i + 1, DAT i + 2,. . ., etc. saved and with the Reference file compared.

To determine the direction of movement and Movement speed of an object can the files DAT i + 1 / DAT i + n with each other be compared. The comparison of two ASCI files require approximately one microsecond.

After an alarm message, the object can either automatically or by the operating team in the Central station can be targeted.  

Interference signals

Object movements of a certain order are determined by the central evaluation computer tolerated. So that will False alarm switched off.

For example, crosses a public street monitored sector, so the vehicles move regardless of vehicle density, size and Speed, in two defined directions. This is registered by the computer and as a message suppressed. (When taking the "freeze frame" is if necessary to ensure driving on the road).

Later an object leaves the street or moves towards the protection zone, alarm will be given triggered.

The distinction between is similar Bird flight and flying objects. Sorting too between humans and game, cows, horses etc. by significant "heat marks" or Movements can be realized.

Signal changes due to fog, precipitation or moving vegetation are within the tolerance range placed.

transmission

The signal transmission between the sensor box and the central evaluation station takes place via cable, Radio or light path and should be redundant be designed. Cable transmission is recommended only in closed, fenced areas those sabotage from the back can be excluded.  

Light paths are completely trouble-free. You require however adjustment during assembly. Combined with An infrared diode can be weather influences Eliminate (fog, precipitation).

evaluation

For the central evaluation facility commercially available microprocessor systems suitable. Of the The computer and control monitor can be stationary in one Control room can also be installed be designed to be transportable.

The software is so comfortable that there is one separate programming by the Operating personnel are unnecessary. Only the freeze frame has to can be created individually for each sensor box. This can also be operated by remote control or Radio control take place.

In the accompanying drawing is an embodiment shown, namely shows in a schematic representation:

Fig. 1 in perspective the overall system,

Fig. 2, the receiving sectors of the sensor stations in top view and

Fig. 3 shows a single sensor station, in perspective in a detail.

The figures mentioned speak for themselves.

Claims (1)

1. Security and warning system for civil and military use to secure outdoor facilities, buildings or national borders against unwanted intruders and notification in the event of danger to a central monitoring point, characterized in that

• a) that several, each multi-redundant sensor stations are spaced from one another near the area to be monitored so that their Emp overlap sectors overlap,
• b) that the sensor stations are equipped with sensors whose signal reception is based on different physical principles and in particular have optical, pyroelectric (infrared) and acoustic sensors working in parallel with one another, the sensors being provided with means for continuously scanning their receiving sector,
• c) that the signals obtained from the sensor stations can be transmitted by radio, light or cable to a central evaluation station located spatially distant from the sensor stations, the evaluation stations comprising: a computer
  • c1) for storing the digitized image signals of the area to be monitored recorded by the sensors as a fixed image, ie without interference, in the form of a reference file as a comparison standard,
  • c2) for comparing further sequences of digitized images supplied by the sensors with one another and with the comparison standard of the fixed image and
  • c3) for alarm notification, provided that the comparative computer analysis shows that the direction and speed of movement and, if applicable, the heat radiation from a detected interference object indicates or represents a danger to the area to be monitored.