Modern police body armour typically provides protection from sharp weapons and low-velocity(handgun) bullets. It is recommended that the armour is worn against the body i.e. no air-gaps arepresent between the wearer and the armour. In the case of formed or shaped armours it may be that airgapsexist (e.g. female specific armours in the breast region). Additionally some manufacturers areincorporating stand-off in their armour designs with the claim that these decrease thermophysiologicalloading on the user by increasing micro-climate cooling. In this paper the effect of stand-off (10 mm)on the measured back face signature (BFS) will be assessed. HG1/A+KR1 armour panels (400 mm x400 mm) were mounted on calibrated #1 Roma Plastilina and impacted with 9x19mm FMJ (DynamitNobel DM11A1B2) ammunition (365 m/s ± 10 m/s). The resulting BFS was measured and comparedto impacts on the same type of armour panels with no air-gaps.
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机译：现代警察机身盔甲通常提供尖锐武器和低速的保护
（手枪）子弹。建议盔甲靠在身体上，即没有空气差距
佩戴者和盔甲之间存在。在形成或成形的腋窝的情况下，它可能是气隙
存在（例如，乳房区域的女性特定手臂）。另外一些制造商是
在他们的盔甲设计中，脱离了这些减少热性能的盔甲设计
通过增加微气候冷却来装载用户。在本文中，脱扣的效果（10毫米）
在测量的背面签名（BFS）将被评估。 HG1 / A + KR1装甲板（400 mm x
安装在校准的＃1 roma plastilina上并用9x19mm fmj（肌动力）撞击
诺贝尔DM11A1B2）弹药（365米/秒±10米/秒）。测量并比较了所得的BFS
影响与没有空气差距的相同类型的装甲面板。
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