EP3216494A1 - Method for improving aiming accuracy of carefully targeted extinguishing systems managed by infrared and video-based early fire detection system - Google Patents

Abstract

The invention relates to a method for improving the accuracy of targeted extinguishing systems by infrared and video early detection with a first IR / video camera system for the first detection (D1) for the continuous fire detection and a second IR / video camera system for the second detection (D2). for automatic target tracking to the source of fire (G), as well as an extinguishing device (A) rigidly connected to the second detection. The process is characterized by steps by which video / infrared-controlled extinguishing systems can be precisely controlled with regard to accuracy and fires can be combated as quickly as possible, already in the formation phase, with as little extinguishing agent as possible.

Description

The invention relates to a method for improving the accuracy of targeted by infrared and video early fire detection controlled extinguishing systems with a first IR / video camera system for the first detection for continuous fire detection and a second IR / video camera system for the second detection for the automatic Zielnachführung to the fire, as well as one with the second detection rigidly connected extinguishing.

Increasingly, more and more infrared detectors, in particular infrared cameras and video cameras for early fire detection in waste incineration plants, recycling plants, outdoor storage and the like are used. This makes it possible to detect fires in the development phase and report them to a downstream fire alarm system. As an extension to these systems increasingly extinguishing systems, especially extinguishing monitors - also known as extinguishing cannons or fire extinguishers - accurately apply extinguishing agents on a fire origin.

Currently, there are already infrared (IR) / video camera controlled launcher extinguishing systems, which, however, produce unsatisfactory targeting accuracy. Either in these systems, the aiming is done by means of an IR camera, which is mounted at a certain distance from the launcher, as from of the WO2004 / 052433 A1 is known, or you put an IR camera firmly on the movable arm of the extinguisher, which is aligned with the fire. Both methods, however, generate system-related errors that make it impossible to precisely align these extinguishing systems.

Furthermore, a Löhewerfersteuerung from the DE 196 01 282 C1 known, wherein an automatic alignment of the thrower tube takes place on the fire by a laser removal thermometer. The distance to the object to be extinguished and the temperature of the object to be extinguished are measured, thereby aligning the projector tube.

The EP 2 705 881 A1 shows a device for controlling extinguishing media throwers by means of a controller and has a position table, which geometrically maps the target positions of the extinguishing agent. In this case, the position panel preferably consists of a pressure-sensitive touchpad or a computer-based intelligent tablet PC, wherein the position table is labeled or printed with the geometric target areas of the delete monitor, for example with a sketch of the deleted object.

It is also known from the US 2016/0030784 A1 a fire detection device that uses electromagnetic waves as the basis, which is sent to the fire and received by a receiver / transmitter this again by return and evaluates.

Furthermore, the disclosure DE 10 2006 025 286 B3 a device for recording large-area thermal images on a monitor with a thermal camera in a pivoting housing. A real-time synchronization of the camera position and the real-time thermal image takes place by synchronization of the camera drive with the camera signal, with the camera moving in real time according to the set scanning speed over the space to be detected. The scanned individual images are joined together on the monitor to form an overall thermal image and continuously updated.

Essentially, the spread of a fire at the earliest possible stage is counteracted, which can prevent large fires, especially for materials with rapid ignition.

Fig. 1 shows the schematic arrangement of an infrared / video camera controlled launcher extinguishing system. A first IR / video camera-1 normally detects the area to be monitored. This is shown here schematically as a surface. But it could also be a complicated, spatial arrangement to be monitored. For example, a football stadium, which is detected by an infrared camera, which is attached to the hanging display block in the center of the stadium. In this case, a hemisphere space would be detected.

This area can either be detected by optics designed especially for spatial requirements, ie optics that designate a room with a special 180 ° optics - also referred to as hemispherical space detection - or by scanning camera systems consisting of individual images or Composed composite images as a panoramic image capture the surveillance area and put together.

The larger the area to be monitored or the more complicated the shape of the area to be monitored, e.g. Hemisphere space in the football stadium, the more distorted the captured image of the IR or video image, from which the space coordinates are calculated to aim the thrower.

Fig. 2 shows an example of a composite IR image of a recycling hall for recycling material, which covers a space of approx. 80 x 30m from a height of approx. 20m. Here is already clearly the wide-angle effect - also called fish eye - to recognize. This generates in particular distortions with lower geometric resolution in the edge region. Therefore, even with this simple geometric detection range, there are resolution errors that degrade controlling a fire monitor in some areas by up to about 4 degrees.

1. 1. Es ist schwierig ein IR-/Videokamerasystem absolut achsenparallel zum Überwachungsbereich zu installieren, da die Dachkonstruktionen z.B. bei Gebäuden, an denen die Erfassungseinheit montiert ist, nicht darauf ausgelegt sind, absolut parallel zur Bodenfläche ausgerichtet zu sein.
2. 2. Weiterhin besteht die Möglichkeit, dass sich Dachträger oder andere Montageteile, an denen die Erfassungseinheit montiert ist, durch Wärmeausdehnung, bedingt durch verschiedene Temperaturen von Winter zu Sommer, verdrehen.
3. 3. Es ist beinahe unmöglich, einen Löschwerfer, der durch die Koordinaten der Erfassungseinheit angesteuert wird, ebenso achsenparallel zum Überwachungsbereich zu installieren. In den meisten Fällen wird ein Löschwerfer auf ein löschmittelführendes Rohr aufgeflanscht. Hierdurch entstehen weitere Winkelfehler zwischen der Brandnesterfassung und der Einheit zur Ansteuerung des Löschmittels.
4. 4. Wird das IR- oder Videobild durch ein scannendes System erfasst, ist ein zusätzlicher Winkelfehler wahrscheinlich.
5. 5. Die Ansteuerung eines Ziels mittels eines handelsüblichen Löschwerfers addiert wiederum einen weiteren Winkelfehler von mindestens +/- 2° zur Treffergenauigkeit hinzu, da diese Löschwerfer anwendungsbedingt eher für die Handansteuerung über Joysticksteuerungen ausgelegt sind, bei denen größere Winkelfehler keine Rolle spielen.
6. 6. Da Löschwerfer und IR-/ Videokamerazielerfassung aus technischen Gründen räumlich über größere Distanzen getrennt sein können, kann je nach Abstand zwischen Löschwerfer und Erfassung über die mathematische Koordinatentransformation ein zusätzlicher Winkelfehler entstehen.

Further aberrations can be caused by the following effects:

1. 1. It is difficult to install an IR / video camera system absolutely parallel to the surveillance area, as the roof structures, for example in buildings where the detection unit is mounted, are not designed to be perfectly parallel to the floor surface.
2. 2. Furthermore, there is the possibility that roof rack or other mounting hardware on which the detection unit is mounted, twist by thermal expansion, due to different temperatures from winter to summer.
3. 3. It is almost impossible to install a fire extinguisher, which is controlled by the coordinates of the detection unit, also axis parallel to the monitoring area. In most cases, a fire extinguisher is flanged onto an extinguishing agent-carrying pipe. This results in more angular errors between the fire detection and the unit for controlling the extinguishing agent.
4. 4. If the IR or video image is detected by a scanning system, an additional angular error is likely.
5. 5. The control of a target by means of a commercial extinguishing gun adds in turn a further angular error of at least +/- 2 ° added to the accuracy of accuracy, as these extinguishing are designed application-based rather for manual control via joystick controls in which larger angle errors play no role.
6. 6. Since extinguishers and IR / Videokamerazielerfassung for technical reasons may be spatially separated over greater distances, depending on the distance between the extinguishing device and recording on the mathematical coordinate transformation, an additional angular error may arise.

If the possible angle errors are summed up from the mentioned possible sources of error, an angle error in the direction of rotation for the activation of targeted launcher extinguishing systems of approx. +/- 8 ° can easily arise.

Fig. 3 shows the most commonly used motion control of a fire extinguisher. This is composed of a rotational movement of up to 360 ° and a tilt movement of up to +/- 90 ° to the horizontal.

• Verwendete Löschwerferanlagen in Recyclinganlagen werden hydraulisch so dimensioniert, dass sie eine durchschnittliche Reichweite von ca. 50m erreichen. Daraus ergibt sich ein Kreisumfang des möglichen Löschbereichs von 2 π r = 2 x 50 x 3,14 = 314m Umfang. Wird nun der 314m Umfang durch 360° geteilt, ergibt sich eine mögliche Zielabweichung von ca. 0,9m pro Winkelgrad.

Observation of the angular error of an IR / video camera-controlled projector extinguishing system with respect to the rotational movement:

• Used extinguisher systems in recycling plants are hydraulically dimensioned so that they reach an average range of about 50m. This results in a circumference of the possible erasure range of 2 π r = 2 x 50 x 3.14 = 314 m circumference. If now the 314m circumference is divided by 360 °, the result is a possible target deviation of approx. 0.9m per angle degree.

At a range of 50m, the best result is a precision of +/- 8 ° x 0.9m, thus an approximate accuracy of + / - 7m. That corresponds to a hit inaccuracy range of altogether 14m.

• Die Neigung des Löschwerfers ist für die Wurfweite des Löschmittels verantwortlich.

Observation of the angular error of an IR / video camera-controlled projector extinguishing system with regard to the tilting movement:

• The inclination of the extinguisher is responsible for the throw of the extinguishing agent.

1. 1. Die Gleichmäßigkeit der Löschmittel-Pumpenleistung, die über die Austrittsgeschwindigkeit v₀ am Löschwerferausgang die Wurfparabel des Löschmittels beeinflusst und somit für die Reichweite des Löschmittelstrahls verantwortlich ist.
2. 2. Von der Dichte des Löschmittels, die wiederum von der Zusammensetzung (z.B. Wasser und Löschmittelzusätze) und der Löschmitteltemperatur abhängt.
3. 3. Von der Art der Löschmittelausbringung (Hohlstrahl- oder Sprühstrahlvariation).
4. 4. Von der Wurfcharakteristik des Löschmittels. Schaum verhält sich anders als Wasser.

In addition to the error possibilities already listed, there are additional factors that influence the throwing distance:

1. 1. The uniformity of the extinguishing agent pump capacity, which exceeds the exit velocity v ₀ at the extinguisher outlet influences the parafoil of the extinguishing agent and thus is responsible for the range of the extinguishing agent jet.
2. 2. The density of the extinguishing agent, which in turn depends on the composition (eg water and extinguishing agent additives) and the extinguishing agent temperature.
3. 3. The type of extinguishing agent application (hollow jet or spray jet variation).
4. 4. The litter characteristic of the extinguishing agent. Foam behaves differently than water.

At best, therefore, results in a throw of 50m accuracy of at least + / - 6 m.

Attempts are currently being made to improve these meeting inaccuracies by means of deletion attempts and the resulting angle correction values. However, this requires several deletion attempts. In a first step, a first hit profile is recorded via deletion attempts.

The calculated correction values are checked with a second deletion test series.

In practice, however, the correction values have to be improved several times. It is an empirical approach. At present, even with this angle correction method at best a precision in the rotational movement of +/- 5 ° is possible. These are in 50m distance +/- 4,5m. In the inclination of the extinguishing can be achieved in about a similar inaccuracy.

Furthermore, this approximation method does not ensure that the entire system is damaged by aging, mechanical drift due to constant pressure changes to the overall system or due to errors in the electronics is not changed in its accuracy of impact.

1. 1. Um einen kleinen Entstehungsbrand in 50m Entfernung zu löschen, muss man mindestens einen Bereich von 7 x 7m ablöschen, um sicher zu treffen.
2. 2. Da derzeit Löschwerfer mit Löschmittelmengen von 2500 l/Minute eingesetzt werden, ergeben sich für das Einrichten eines Löschwerfers schnell Löschmittelverbräuche von mindestens 50.000 l Löschmittel.
3. 3. Durch Alterung des Werfers oder der Erfassung oder nach einer Reparatur dieser Komponenten verbunden mit einer Demontage / Montage ergeben sich ggf. neue mechanische Ungenauigkeiten, die ein Nachjustieren mit Testlöschungen erforderlich machen.

The disadvantage is thus:

1. 1. In order to extinguish a small conflagration 50 meters away, you have to extinguish at least a 7 x 7m area in order to hit it safely.
2. 2. Since extinguishers are currently used with extinguishing agent quantities of 2500 l / minute, the extinguishing agent consumptions of at least 50,000 l of extinguishing agent are quickly achieved when setting up a fire extinguisher.
3. 3. Aging of the jammer or detection or repair of these components in conjunction with disassembly / assembly may result in new mechanical inaccuracies necessitating readjustment with test erasures.

It is an object of the invention to provide a method of the type mentioned above, met with the video / infrared controlled extinguishing systems precisely in terms of accuracy and fires as quickly as possible, can be combated already in the development phase, with as little as possible extinguishing agent.

• Ermittlung der Abweichung (F1) des Mittelpunkts des Löschmittelstrahls (F) in Drehrichtung des Löschwerfers (A) zum Mittelpunkt (M)des Erfassungsbereichs der zweiten Detektion-2 (D2) durch einmalige Testmessung mit Löschmittel auf den Brandherd (G),
• grobe Ausrichtung des Löschwerfers (A) mittels der mit Detektion-1 (D1) ermittelten Brandherdposition auf den Brandherd (G),
• Ermittlung mittels Detektion-2 (D2) der Abweichung (G1) des Mittelpunktes des Brandherdes (G) zum Mittelpunkt (M) des Erfassungsbereichs (E) der Detektion-2 (D2),
• Ausregeln durch Verfahren des Löschwerfers (A) in seiner Drehung (C) gegen Null,
• Ermittlung der Breite des horizontalen Winkelbereichs, nämlich die Breite des erkannten Brandherdes (G), mittels Detektion-2 (D2), wobei
  • der Löschwerfer (A) so lange bewegt wird, bis dieser mit dem Mittelpunkt (M) des Erfassungsbereichs (E) der Detektion-2 (D2) von der einen Seite des Brandherdes (G) bis zur anderen Seite des Brandherdes (G) verfahren wurde, oder
  • der Winkelbereich aus der horizontalen Anzahl der die Breite des Brandherdes (G) beschreibenden Bildpunkte des Wärmebildes in Relation zur Anzahl aller, der in horizontaler Richtung zur Verfügung stehenden Wärmebildpunkte, mit dem dazu gehörenden Erfassungswinkel gesetzt wird,
• Ermittlung der Übereinstimmung des Mittelpunkts (M) des Erfassungsbereichs (E) der Detektion-2 (D2) mit dem Mittelpunkt des Löschmittelstrahls (F), wobei
  • bei Kenntnis des horizontalen und vertikalen Abstandes (X) und (Y) des Löschmittelaustritts des Löschwerfers (A) zum Brandherd (G) die Neigung des Löschwerfers (A) aus einer einmal empirisch ermittelten Flugbahn berechnet wird, indem der Löschwerfer (A) so eingestellt wird, dass dieser auf die theoretisch maximal notwendige Wurfweite ausgerichtet wird und durch einmaliges Auslösen des Löschvorgangs die Wurfweitenabweichung zwischen dem Ist- und dem Sollwert ermittelt werden, aus der sich die reale Wurfparabel errechnet, oder
  • bei Nichtkenntnis des horizontalen und vertikalen Abstandes des Löschmittelaustritts des Löschwerfers (A) zum Brandherd (G), die Abstandsmessung durch Triangulation und Berechnung mittels trigonometrischer Funktionen aus den Ausrichtungswinkeln von Detektion-1 und Detektion-2 zum Brandherd (G) erfolgt,
• Ausregeln durch Verfahren des Löschwerfers (A) in seiner Neigung zum Mittelpunkt des Brandherdes (G).

According to the invention the problem is solved by

• Determining the deviation (F1) of the center of the extinguishing agent jet (F) in the direction of rotation of the extinguishing head (A) to the center (M) of the detection area of the second detection-2 (D2) by a single test measurement with extinguishing agent on the fire (G),
• coarse alignment of the extinguisher (A) by means of the detected with Detection-1 (D1) fire position on the Fire (G),
• Determination by means of detection-2 (D2) of the deviation (G1) of the center of the fire (G) to the center (M) of the detection zone (E) of detection-2 (D2),
• Balancing by moving the extinguisher (A) in its rotation (C) towards zero,
• Determining the width of the horizontal angle range, namely the width of the detected fire (G), by means of detection-2 (D2), where
  • the extinguisher (A) is moved until it has been moved with the center (M) of the detection area (E) of the detection-2 (D2) from one side of the fire (G) to the other side of the fire (G) , or
  • the angular range from the horizontal number of pixels of the thermal image describing the width of the source of fire (G) in relation to the number of all thermal pixels available in the horizontal direction, with the associated detection angle,
• Determining the coincidence of the center (M) of the detection area (E) of the detection-2 (D2) with the center of the extinguishing agent beam (F), wherein
  • with knowledge of the horizontal and vertical distance (X) and (Y) of the extinguishing agent outlet of the extinguishing launcher (A) to the source (G), the inclination of the extinguishing launcher (A) is calculated from a once empirically determined trajectory by the extinguishing head (A) set so is that this is aligned to the theoretically maximum required throw and determined by a single triggering the extinguishing process, the throw distance deviation between the actual and the setpoint, from which the real throw parable calculated, or
  • in the absence of knowledge of the horizontal and vertical distance of the extinguishing agent outlet of the extinguisher (A) to the fire (G), the distance measurement by triangulation and calculation by means of trigonometric functions from the orientation angles of detection-1 and detection-2 to the fire (G),
• Adjustment by operation of the extinguisher (A) in its inclination to the center of the fire (G).

The method according to the invention makes it possible to precisely set video / infrared-controlled extinguishing systems with regard to the aiming accuracy at detected fire sources and to fight fires as fast as possible, ie already in the formation phase, with as little extinguishing agent as possible. As a result, time is saved in the fight against the fire, since the targeted extinguishing the maximum amount of extinguishing agent is applied to the fire. Furthermore, the environment is protected because the extinguishing water admixed wetting and foaming agents are harmful and sometimes toxic to the environment. In addition, with a lower consumption of extinguishing agent and a lower storage of extinguishing agent is needed.

Fig. 1

eine schematische Anordnung einer IR-/Videokameragesteuerten Löschwerfer-Brandlöschanlage,

Fig. 2

ein Infrarot-Bild bzw. Panoramathermografie beispielhaft einer Anlieferungshalle für Recycling-Material,

Fig. 3

eine schematische Darstellung der am häufigsten verwendeten Bewegungsansteuerung eines Löschwerfers,

Fig. 4

eine schematische Darstellung der Komponenten am Löschwerfer gemäß Fig. 3 zur Beschreibung des erfindungsgemäßen Verfahrens zur Verbesserung der Zielgenauigkeit und

Fig. 5

eine schematische Darstellung der Brandlöschung mittels Löschwerfers zur Beschreiben des Verfahrens zur Verbesserung der Zielgenauigkeit bei der Neigebewegung.

The idea underlying the invention will be described in more detail in the following description of the method with reference to the drawings. Show it:

Fig. 1

a schematic arrangement of an IR / video camera controlled fire extinguisher fire extinguishing system,

Fig. 2

an infrared image or panoramic thermography exemplifies a delivery hall for recycled material,

Fig. 3

a schematic representation of the most commonly used motion control of a fire extinguisher,

Fig. 4

a schematic representation of the components on the extinguishing head according to Fig. 3 to describe the inventive method for improving the accuracy and

Fig. 5

a schematic representation of the fire extinguishing means extinguishing launcher for describing the method for improving the accuracy of the tilting movement.

In Fig. 1 are a monitoring area U, in which a source of fire G could arise in a room with a ceiling R shown. Two IR / video camera systems (hereinafter referred to as Detection-1 and Detection-2, respectively) are used to improve the aiming accuracy. Detection-1 D1 is responsible for continuous fire detection. In the case of a detection of a source of fire G hereby the coarse coordinates for the alignment of a fire extinguisher A are calculated. However, these are very inaccurate due to the conditions described above.

Detection-1 D1 and the extinguisher A are attached to the ceiling R.

By means of detection-2 D2, which is rigidly connected to the moving part of the extinguisher A, which is aligned directly on the fire G, an automatic Zielnachführung can now actively take place.

• Üblicherweise ist mit einer Abweichung des Mittelpunkts des Löschmittelstrahls F in Drehrichtung C des Löschwerfers A mit dem Mittelpunkt M des Erfassungsbereichs E der Detektion-2 ohne vorhergehenden Abgleich der beiden Achsen zu rechnen.

To improve the accuracy of aiming the rotation of the extinguisher A:

• Usually, with a deviation of the center of the extinguishing agent jet F in the direction of rotation C of the extinguishing launcher A with the center M of the detection area E of the detection-2 to be expected without prior adjustment of the two axes.

By means of a one-time test measurement with extinguishing agent, the horizontal deviation F1 of the extinguishing agent jet F to the center M of the detection region E can be easily determined. Due to the rigid coupling between extinguisher A and detection-2 long-term drift is almost impossible. Therefore, a readjustment can be dispensed with.

• Mittels der mit Detektion-1 ermittelten Brandherdposition wird der Löschwerfer A auf den Brandherd G grob ausgerichtet. Mittels Detektion-2 wird nun die Abweichung G1 bzw. G2 des Mittelpunktes des Brandherds G zum Mittelpunkt M des Erfassungsbereichs E der Detektion-2 ermittelt und durch Verfahren des Werfers in seiner Drehbewegung C zu Null ausgeregelt. Hierbei muss die Abweichung F1, die wie zuvor beschrieben ermittelt wurde, als Winkelkonstante berücksichtigt werden.

If the deviation F1 is known, the procedure described below results:

• By means of the detected with detection-1 fire position of the extinguisher A is roughly aligned to the source of fire G. By means of detection-2, the deviation G1 or G2 of the center point of the fire range G to the center M of the detection area E of the detection-2 is now determined and compensated for by turning the projector in its rotational movement C to zero. Here, the deviation must be F1, as before was determined as an angle constant.

The width of the horizontal angle range, ie the width of the detected fire hearth G over which the extinguisher A must be moved in order to completely extinguish the source of fire G, can be determined via the detector 2 rigidly connected to the extinguisher A.

1. 1. Der Löschwerfer A wird so lange bewegt, bis dieser mit dem Mittelpunkt M des Erfassungsbereichs E der Detektion-2 von der einen Seite des Brandherds G bis zur anderen Seite des Brandherds G verfahren wurde.
2. 2. Der Winkel wird aus der horizontalen Anzahl der Bildpunkte des Wärmebildes, die die Breite des Brandherds G beschreiben, berechnet, indem sie in Relation zur Anzahl der Bildpunkte, der in horizontaler Richtung zur Verfügung stehenden Wärmebildpunkte, gesetzt wird. Der dazu gehörende, erfasste Winkelbereich der IR- oder Videokamera kann normalerweise dem Datenblatt der verwendeten Kamera entnommen werden.

This can be done in two ways:

1. 1. The extinguisher A is moved until it has been moved to the center M of the detection area E of the detection-2 from one side of the fire G to the other side of the fire G.
2. 2. The angle is calculated from the horizontal number of pixels of the thermal image describing the width of the source of fire G, by setting them in relation to the number of pixels, the thermal pixels available in the horizontal direction. The associated detected angular range of the IR or video camera can normally be taken from the data sheet of the camera used.

• Ideal zur Verbesserung der Treffergenauigkeit in der Neigebewegung N des Löschwerfers A wäre eine Übereinstimmung des Mittelpunkts M des Erfassungsbereichs E der Detektion-2 mit dem Mittelpunkt des Löschmittelstrahls F gemäß Fig. 4.

To improve the accuracy of aiming the pitching movement N of the extinguisher A:

• Ideal for improving the accuracy in the pitching movement N of the extinguisher A would be a coincidence of the center M of the detection area E of the detection-2 with the center of the extinguishing agent beam F in FIG Fig. 4 ,

Since the course of the extinguishing agent jet F, as soon as it is applied at an angle to Erdanziehung, has a parabolic-like course, which is related to the exit velocity of the extinguishing agent, the application angle to the attractive force and the material composition (eg water / foam ratio), he always deviates from this ideal line from. This vertical deviation is described by F2.

Are the routes X and Y according to Fig. 6 and thus the distance J of the extinguishing agent outlet of the extinguisher A to the source of fire G known, the inclination of the extinguisher A can be calculated from a once empirically determined trajectory. For this purpose, the extinguishing spotlight A is set so that it is aligned to the theoretically maximum for the application range necessary throw. By triggering the deletion process once, the throw distance deviation between the actual and setpoint values can be determined. From this it is possible to calculate the real throwing parabola. If an inclination range is controlled instead of a calculated inclination angle, occurring pressure fluctuations and fluctuations of the extinguishing agent composition are compensated.

If the distance J of the extinguishing agent outlet of the extinguisher A to the fire G is not known, the distance J must be determined become. Currently, no IR / video camera system provides useful distance information to the detected source of fire.

Especially in the distance measurement of recycled material excrete conventional, low-cost laser or radar based distance measuring systems, as they do not clearly reflect in the diffuse surface of the material to be monitored P and thus provide no useful measurement data.

The use of two IR / video camera systems of the described method enables the triangulation distance measurement according to Fig. 6 , Triangulation is a geometrical method of optical distance measurement by accurate measurement of the angles α and β within triangles or reference lines Z. The calculation is carried out by means of trigonometric functions.

Fig. 5 and 6 also show the optional possibility of using a marking laser L which rectilinearly marks the center of the detection zone E of the detection-2 D2. With E1 here only the vertical portion of the detection range of the detection-2 D2 is shown.

List of reference numbers used

A

extinguishing launchers

C

Rotation; Rotational direction; Rotary movement of the extinguisher A

D1

Detection-1

D2

Detection-2

e

Detection Range 2

E1

Vertical part of the coverage area E

F

Extinguishing jet

F1

Horizontal deviation of the extinguishing agent jet F

F2

Vertical deviation of the extinguishing agent jet F

G

fire

G1, G2

Deviation of the center of the source of fire G to the center M of the detection area E of the detection-2

J

Distance of the extinguishing agent outlet of the extinguisher A to the fire G

L

laser marking

M

Center of the detection area E

N

Tilting movement of the extinguisher A

P

Monitored material

R

ceiling

U

monitoring area

X

Horizontal distance of the extinguishing agent outlet of extinguisher A to the fire G

Y

Vertical distance of the extinguishing agent outlet of the extinguisher A to the fire G

Z

Triangles or reference lines

α

Orientation angle; Angle for Z

β

Orientation angle; Angle in Z

Claims (1)

A method for improving the accuracy of targeted by infrared and video early detection fire-extinguishing systems with a first IR / video camera system for the first detection (D1) for continuous fire detection and a second IR / video camera system for the second detection (D2) for the automatic Zielnachführung to the fire (G), as well as to the second detection (D2) rigidly connected extinguishing device (A), characterized by - Determining the deviation (F1) of the center of the extinguishing agent jet (F) in the direction of rotation (C) of the extinguisher (A) to the midpoint (M) of the detection area (E) of the second detection-2 (D2) by a single test measurement with extinguishing agent on the fire (G), coarse alignment of the extinguisher (A) by means of the fire position determined with detection-1 (D1) on the fire source (G), Detection by means of detection-2 (D2) of the deviation (G1) of the center of the fire (G) to the center (M) of the detection zone (E) of detection-2 (D2), - compensating by moving the extinguisher (A) in its rotation (C) towards zero, - Determining the width of the horizontal angle range, namely the width of the detected fire (G), by means of detection-2 (D2), wherein the extinguisher (A) is moved until it reaches the center (M) of the detection zone (E) of detection-2 (D2) from the one side of the source of fire (G) to the first other side of the fire (G), or the angle range from the horizontal number of pixels of the thermal image describing the width of the source of fire (G) in relation to the number of all thermal pixels available in the horizontal direction, with the associated detection angle, - Determination of the coincidence of the center (M) of the detection area (E) of the detection-2 (D2) with the center of the extinguishing agent beam (F), wherein - With knowledge of the horizontal and vertical distance (X) and (Y) of the extinguishing agent outlet of the extinguishing launcher (A) to the fire (G), the inclination of the extinguishing launcher (A) is calculated from a once empirically determined trajectory by the extinguishing head (A) so is set, that this is aligned to the theoretically maximum required throw and determined by a single triggering the extinguishing process, the throw distance deviation between the actual and the setpoint, from which the real parcel calculated, or - Ignore the horizontal (X) and vertical (Y) distance of the extinguishing agent outlet of the extinguishing fire (A) to the fire (G), the distance measurement by triangulation and calculation by trigonometric functions from the orientation angles (α; β) of detection-1 (D1 ) and detection-2 (D2) to the source of fire (G), - Balancing by means of the extinguishing device (A) in its inclination to the center of the fire (G).

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