DD300935A7 - PROCESS FOR THE PRODUCTION OF TARM AGENTS - Google Patents

Abstract

The invention relates to a process for the production of camouflage agents against reconnaissance and destruction agents which use the electromagnetic radiation, in particular in the thermal infrared range. The inventive method for the production of camouflage agents in the thermal infrared range has a working time of> 1 minute and is characterized in that known per se with a particle size of 2 My m to 20 My by means of propellant gas via a jet lock to a particle concentration of the active ingredient of 1 g / m exp 3 to 20 g / m exp 3 are discharged.

Description

For this 1 page drawings

Field of application of the invention

The invention relates to a process for the production of camouflage agents against reconnaissance and destruction agents which use the electromagnetic radiation, in particular in the thermal infrared range.

Characteristic of the known state of the art

Camouflage in the thermal infrared range of 2 μm to 14 μm and the protection against destructive agents which are used with the aid of the elucidation and targeting with electromagnetic radiation is described in many patents, e.g. DE 3012405.

Primarily, pyrotechnic reaction mist or the combination with powder substances are named, the physical law of radiation attenuation by fog particles in the size of the wavelength of the reconnaissance radiation opposes considerable restrictions, since this effect is random and is not reproducible by pyrotechnic reaction mist in conjunction with the respective meteorological conditions , It is also known that powders or specifically prepared microballoons of appropriate size in the μ range could be used to reduce transmission in the atmosphere, e.g. DE 3226884. The application of these substances by pyrotechnic reaction mist is contrary to the effect described below not possible, so that a separate distribution must be made via gas generators, for. DE 2729055.

In a large number of patents, the undoubtedly improved camouflage effect is described by utilizing the thermals of hot reaction nebulae, which counteracts the rapid drop in the particle cloud, which is usually produced by weft discharge, thus ζ. B. according to DE 3238455.

The transport of powder by jet nozzles (ejectors) is common in the chemical industry, wherein the flowability is an essential prerequisite, or methods for ensuring the flow are known.

Object of the invention

The aim of the invention is, with an easily manageable process under suitable meteorological conditions, to ensure camouflage against electromagnetic reconnaissance agents and acting on this principle ordnance, especially in the thermal infrared range over a period of action> 1 minute.

Explanation of the essence of the invention

The invention has for its object to develop a novel process for the production of camouflage agents. According to the invention, this object is achieved in that per se known agents with a particle size of 2μπι to 20pm by means of propellant gas through a jet lock to a particle concentration of the active ingredient of 1 g / m ³ to 2Og / m ^{3 are} discharged.

As active substances flowable or flowable substances such as activated carbon, chalk, zinc oxide, PVC, fire extinguishing powder are used individually and / or as a mixture that can be preheated by hot propellant gas. The particle concentration of the active ingredient is made variable by the choice of the amount of propellant gas and the propellant gas pressure. The discharge can take place both in horizontal and vertical direction.

The propellant gas used is a pyrotechnically produced or stored propellant gas having an effective pressure of> 0.1 MPa, which can act on one or more discharge containers with jet sluice.

Through the use of a pyrotechnically generated or applied as a compressed gas cylinder propellant gas jet is effective as a discharge device, which allows specifically produced active ingredients variable discharge so that a camouflage in defined wavelength ranges, especially against the thermal imaging, is possible. The variable pressure and nozzle discharge allows both in a short time with high and for a long time with a lower concentration, as required, to achieve the intended camouflage effect.

The heat of the pyrotechnically generated propellant gas serves to support the active principle. In addition, the masking effect for the visible region can be coupled with pyrotechnic reaction mists, wherein the heat of reaction of the mist reduces the deposition process of the particle cloud.

The method can be carried out on all types of known triggering for propellant gas production such as electric, tear, firing pin or remote ignition.

The method according to the invention can be used under the meteorological conditions which are customary for any type of fogging camouflage, can even be used within wide limits by the separate application, and enables camouflage over a period of action of> 1 minute.

The invention will be explained in more detail below using an exemplary embodiment.

The pictures contained therein show:

BiIdI: uncovered target

Picture 2: Target area covered by particle cloud

embodiment

By means of electric ignition, the pyrotechnic charge or a shaped propellant powder prepared for producing the propellant gas is reacted.

In parallel, the ignition of the pyrotechnic fog set can be done. The propellant gas acts immediately (with or without means for pressure control) on the previously with 201 activated carbon (2 pm to 20 pm) filled jet lock (4-mm nozzle).

Over a period of more than a minute, both activated carbon and fog are applied. The amount, height and direction of the discharge are determined by the position of the discharge pipe and the selected pressure.

The process can be used after refilling with a propellant gas generating set and the active substance with the same jet lock.

The results of the method according to the invention are shown in FIGS. 1 and 2.

The photos show in picture 1 an uncovered target with temperatures

left object 30 ⁰ C right object ^{1 0 0} C and

in picture 2 a target area covered by a particle cloud. Both are photographs of thermal images modulated in the visible range and then placed on the monitor, which the camera detected in the IR range of the optical windows sw 2 pm to 5 pm and Iw 8 pm to 14 pm.

Claims (6)

1. A process for the production of camouflage in the thermal infrared range with a time of action > 1 minute, characterized in that known per se known agents with a particle size of 2 μητι to 20 μηη be discharged by means of propellant gas via a jet lock to a particle concentration of the active ingredient of 1 g / m ³ to 20 g / m ³ . 2. The method according to claim 1, characterized in that as active substances flowable or flowable substances such as activated carbon, chalk, zinc oxide, PVC, fire extinguishing powder are used individually and / or as a mixture. 3. The method according to claim 1, characterized in that the particle concentration of the active ingredient is varied by the choice of the amount of propellant gas and the propellant gas pressure. 4. The method according to claim 1, characterized in that the active ingredient is preheated by hot propellant gas. 5. The method according to claim 1, characterized in that a pyrotechnically generated or stored propellant gas with an effective pressure> 0.1 MPa is used as the propellant gas. 6. The method according to claim 1, characterized in that in addition to the discharged active ingredient simultaneously a thermally active pyrotechnic reaction mist is applied.