SE468366B - OEVNINGSMAAL - Google Patents

Description

4> Qx 10 15 20 25 30 šéf (J Conditions set during the development work: l) Easy to use 2) Cheap in relation to today's equipment 3) Realistic in speed and maneuverability 4) Immediate response 5) Only two options: downed/not downed 6) Variable difficulty level through a) variable target size b) variable number of hits to provide downed The conditions l-3 have led to the choice of radio-controlled miniature aircraft as a preferred carrier of sensing and indicating devices and intermediate signal processor.

Condition 4 is met by a pyrotechnic visual indication, flash, mounted on the aircraft. One could also consider an electric flash or radio transmission to a "display" on the ground.

The essential limitation according to condition 5 then provides the possibility of fulfilling condition 6. The target size can be varied by giving the sensor unit a variable sensitivity threshold. Here, a microphone has been chosen that senses the pressure shock from a projectile passing by at supersonic speed. The amplitude of this pressure shock is proportional to the distance, which is why different threshold levels can be chosen for it. This means that the miniature aircraft can constitute a "virtual" target of varying size from case to case. "Virtual" because the visible target that the soldier is aiming at is always the miniature aircraft.

The signal processor has also been introduced with a buffer for the number of registrations, which means that the requirement for the number of hits for downing can be varied, i.e. the targets can be made to be of different "hardness". l0 15 20 25 2 468 366 The present invention is apparent from the following description, patent claims and two drawings, where Fig. 1 shows a miniature aircraft equipped according to the invention and where Fig. 2 shows a block diagram for the connection of the measuring and registration equipment according to the invention.

The "Grill" consists, according to a preferred embodiment, of the following main components: Sensor/Detection means is a microphone 1 that captures signals from projectiles with supersonic speed. This also means that the Doppler effect limits the speed range to < 400 km/h.

For the present purpose, i.e. training in combating slow-moving aircraft, this is of secondary importance.

The majority of all small arms ammunition (with the exception of pistol ammunition) has supersonic velocity.

Sensor 1 can, however, be made electromagnetic which eliminates these limitations.

The signal processor is a unit 2 where the sensitivity threshold for the microphone is set, as well as the number of registrations required for suppression.

When the preset number of registrations has been reached, processor 2 sends a signal that triggers an indication.

The indicator unit 3 may consist of a number of pyrotechnic cartridges which produce a strong reddish flash for good visibility.

The cartridges are thrown away after use and replaced by new ones. 10 15 20 25 O°\ OO 366 The miniature airplane is radio-controlled and can be controlled from the ground in terms of both maneuvers and speed. The plane does not need a special launch ramp but is thrown away by the "pilot's" assistant.

Below, a preferred embodiment of the measuring and recording equipment, which consists of the main components 1-3, will be described in more detail with reference to Fig. 2.

The equipment consists of five units: Measuring microphone 4, signal processing unit 5, decoder and detonator unit, pyrode 7 and accumulator pack 8.

The signal processing unit, decoder/detonator unit and battery pack are integrated into a hit indicator.

The measurement microphone and pyrotechnic part are connected to the hit indicator with wiring fitted with connectors.

The hit indicator is based on the principle that a pressure wave (supersonic bang) is generated around a projectile traveling at supersonic speed. The amplitude of the pressure wave decreases with distance from the passing projectile.

The pressure wave is captured by a measuring microphone, whose signal is transmitted to the signal processing section.

In the signal processing section, the incoming signal is processed and detected. The analog signal is then converted to digital form. (8 bits parallel). The digital information is then transferred to the decoder/detonator section.

In the decoder section, the digital information, which is proportional to the amplitude of the supersonic bang, is converted into a new digital form, which corresponds to 15 distance zones around the microphone. A preset zone is then selected and passed on to a programmable counter, which counts the number of detected hits within the selected zone. The counter is adjustable between 1 and 15. When the correct number of hits is reached, an ignition pulse is generated for a pyrotechnic charge.

The pyrotechnic part consists of 10 pyrotechnic charges. These are triggered electrically. Selection and the necessary ignition pulse are generated in the detonator part, which is integrated with the decoder part.

All units are powered in any suitable way, for example from a separate battery pack.

Claims (1)

1. 0 15 20 36-6 PATENT REQUIREMENTS 1. Exercise target for preferably small arms, which target is remotely controlled and movable above a ground and / or water surface, characterized in that the exercise target contains a sensing means (1), an indicating means (3) and an intermediate signal processing unit (2), which sensing means (1) is responsive to passing projectiles, the sensing means (1) being adjustable directly or indirectly through the projectile signal processing unit (2) at a predetermined distance from the exercise target and wherein the sensing means (1) and / or the signal processing unit (2) at a predetermined number of projectiles within the selected predetermined distance delivers trigger indication to the indicating means (3). Exercise case according to claim 1, characterized in that the signal processing unit (2) and / or the sensing means (1) is presettable for a predetermined projectile type. Exercise objectives according to claim 1 or 2, characterized in that the sensing means (1) is acoustic or electromagnetic or a combination of both. Exercise objectives according to one or more of the preceding claims, characterized in that a signal emitted from the signal processing unit (2) can trigger a visual or radio-transmitted indication. Exercise objectives according to claim 4, characterized in that the visual indication is either pyrotechnic or electrical or a combination of both. 1) 7 e 468 366 Exercise needle according to one or more of the preceding claims, characterized in that the sensing means (1), the indicating means (3) and the signal processing unit (2) are arranged in a remote-controlled vehicle such as a model aircraft.