F - Mech Eng,Light,Heat,Weapons – 41 – J
Patent
F - Mech Eng,Light,Heat,Weapons
41
J
349/31
F41J 5/12 (2006.01) F41J 5/06 (2006.01)
Patent
CA 1151762
ABSTRACT OF THE DISCLOSURE: The target comprises a target ring arrangement with a frame bounding a measuring chamber and closed at the front and rear by fabric covers said frame carrying on the inside acoustic sensors as well as a surface layer carrying the target image. In order to produce approximately the same temperature gradient at each point of the target plane a downwardly and upwardly open air circulation space is formed between the surface layer carrying inthe target image the front measuring chamber cover and/or a roof-like cover which at least in the forwards direction projects over the surface layer carrying the target image is provided in the upper edge area of the target ring arrangement. The sensors have a clearly defined position relative to the reference coordinate system. To ensure that changes to the sound propagation velocity within the target do not lead to incorrect indications, the group of sensors has at least one more sensor than is necessary for calculating the shot position when the sound propagation velocity is known.
340276
Polytronic Ag
Robic Robic & Associes/associates
LandOfFree
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