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Leio's PLA military photos (kinds of military equipments)

What kind of test?
The room calld 微波暗室 or 全电波暗室 (anechoic chamber) ... usually such room for EMI/EMC test (Electro-Magnetic Interference). The jagged objects on the wall for absorbing ambient electromagnetic interference, inside the room it's a pure & clean electromagnetic environment to measure the electromagnetic radiation of target under test (using a EMI frequency spectrum analyzer).

When in Foxconn they testing PC/MobilePhone/LapTop insde anechoic chamber, in BYD they testing automobile inside anechoic chamber.

All commercial products should doing EMC test in anechoic chamber before sale in market cause massive electromagnetic radiation can hurt ppl health. All equipments related to life safety should doing EMI test in anechoic chamber to improve anti-interference ability & system security.

微波暗室要屏蔽的不仅是可见光,还包括其它波长的电磁波。其实也就是用吸波材料来制造一个封闭空间,这样就可在暗室内制造出一个纯净的电磁环境,以方便排除外界电磁干扰微波暗室材料可以是一切吸波材料,目前以铁氧体吸波材料性能最佳,它具有吸收频段高、吸收率高、匹配厚度薄等特点。它的主要工作原理是根据电磁波在介质中从低磁导向高磁导方向传播的规律,利用高磁导率铁氧体引导电磁波,通过共振,大量吸收电磁波的辐射能量,再通过耦合把电磁波的能量转变成热能。
为了检测产品的电磁兼容性,产品必须在规定的标准环境中进行测试。理想的辐射场地是无限大的良好的导电地平面构成的,这是因为金属网(板)对电波产生全反射。在一定条件下,即反射角较小时,反射系数|R|≈1 ,不同介质平面的反射系数值也不同,故用金属地平面可使测量数据可靠,也使不同地区测量的数据具有可比性。国际上是以开阔测试场作为电磁辐射的标准实验场地,但是,由于现代生活环境中很难找到理想的开阔场,因此,微波暗室,就成为一种非常普及的代替环境。
随着微波技术的发展,为了进行各种微波测量,要求模拟电磁波在自由空间传播的环境条件,微波无反射室即微波暗室也正是针对这一需要而研制的。
电波暗室主要用于辐射无线电骚扰(EMI)和辐射敏感度(EMS)测量,电波暗室的尺寸和射频吸波材料的选用主要由受试设备(EUT)的外形尺寸和测试要求确定,分3m法或10m法。
微波暗室可以用于天线、电磁兼容、雷达截面测量、无线电控制设备的对接试验,以及各种类型的电磁模拟试验等。
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Navy J-15
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PLAAF J-20
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PLAAF J-16

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2014 PLAAF officers visted F-22 in Alaska base
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CJ-1000AX完成首台整机装配
China CJ-1000AX jet engine launch

2017年12月25日,大型客机发动机验证机(CJ-1000AX)首台整机在上海完成装配,标志我国首个民用大涵道比涡扇发动机整机验证平台已经建立,将为后续研制工作奠定坚实基础。
CJ-1000AX由中国航发集团商发公司负责研制,直径1.95米,长3.29米。其结构复杂、试制难度大,包含风扇/增压级、核心机、低压涡轮和附件传动机匣装置,由近35000个零组件组成。中国航发集团商发公司采用“主制造商-供应商”研制模式,联合24家单位参与试制工作,先后突破了钛合金宽弦高空心率风扇叶片、铝合金大型薄壁风扇包容机匣、3D打印燃烧室燃油喷嘴等多项试制关键技术,同时也攻克了大直径、长轴类单元体水平装配技术难关,历时18个月完成首台整机试制、装配。
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PLAAF J-11B / J-11BS
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This is the next generation assault rifle, equiped with advanced electronics, genade launcher, nightsight gear as well as improved ammo(~6mm, instead of 5.8mm like type-95) to defeat enemies equiped with advanced body armour.
 
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ZH-05

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ZH-05 assault rifle / grenade launcher system (3D model)



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ZH-05 assault rifle / grenade launcher system (3D model)



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ZH-05 assault rifle / grenade launcher system



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ZH-05 assault rifle / grenade launcher system



Caliber

5.8×42 + 20mm

Length

950 mm

Barrel length

n/a

Weight

5 kg

Rate of fire

n/a

Magazine

30 rounds (rifle) + 1 round (20mm GL)



ZH-05 assault rifle / grenade launcher system is an apparent Chinese answer to unsuccessful US XM-29 OICW system and a slightly more successful K-11 weapon system from South Korea. So far little information is available on the ZH-05, but it is believed to be in limited service with some PLA units.



ZH-05 is a complex weapon which combines 5.8mm assault rifle, single-shot 20mm grenade launcher with several types of rounds, and an electronic sight which is used to accurately aim both barrels and pre-set electronic fuses of 20mm grenades for airburst at predefined ranges.



Rifle component of the ZH-05 is a most conventional one. It is apparently based on the Type 03 assault rifle and uses fairy typical gas-operated action and 30-round magazines.



The grenade launcher is integrated above the rifle component and is a single shot, breech loading bolt action weapon which fires specially designed 20mm rounds. Early versions of the ZH-05 featured magazine-fed grenade launchers but current versions are single-shot to achieve necessary weight reduction. 20mm ammunition is available in several versions, with air-burst warheads pre-programmed through electronic sighting unit, armor-piercing grenades for use against lightly armored vehicles, and special “shrapnel” loads which might be useful against small moving targets such as tactical UAV. Muzzle velocity for 20mm rounds is listed as about 220 meters per second, with maximum effective range against stationary targets being 800 meters. Projectile weight is about 85 gram, killing radius of fragmenting warhead is claimed to be about 7 meters.



Sighting unit is an electronic device which includes laser range finder, ballistic computer and grenade programming interface. The optical sight, as it seems, is not integrated into the unit and can be easily replaced, making the system more affordable, extensible and flexible. Sighting unit can transmit it video feed to external display, i.e. to a helmet-mounted eyepiece, thus permitting for “around the corner” shooting without exposition of the shooter’s head and torso to the enemy fire.
 
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