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The universal measurement device for barrel angle acquisition in the simulated fire training of armored vehicles is designed and implemented. The device eventually becomes a measurement element in universal mounting simulated shooting training system. This paper presents the principles and methods of this device in details. The ADXL345 three-axis accelerometer is adopted in the tilt and pitch angles' acquisition of this device to achieve high accuracy requirements. In the measurements of azimuth angle, the groove coupler and grating disk are used as the core counting elements for the angle's measurement. The solving process is conducted in the device for the collected data of each angle of the barrel, and the data transfer and display are achieved though serial interface or LCD. [ABSTRACT FROM AUTHOR]

The construction of transition metal sulfides integrated into three-dimensional graphene network (3DGN) is a greatly attractive strategy for energy conversion and storage. Metal–organic framework (MOF) as template-derived CoS2 with N-doped carbon coating (CoS2-N-C) sheets (~ 510 nm) anchored on 3DGN (CoS2-N-C/3DGN) was designed and synthesized via a solution immersion reaction combined with a carbonization–sulfidation treatment. The formed ultra-small CoS2 nanoparticles are uniformly diffused and encapsulated in the N-rich carbon matrix, grown on 3DGN to obtain a self-supporting structure. The resulting CoS2-N-C/3DGN composites were evaluated as binder-free anode materials of lithium-ion batteries, delivering a high reversible gravimetric capacity of 409.5 mA h g−1 after 100 cycles as well as great rate capability of 124 mA h g−1 at 1600 mA g−1. The enhanced electrochemical behaviors should be attributed to the synergistic interaction between CoS2-N-C with high electrochemical activities and 3DGN with high conductivity and macroscopically porous structure. This work provides new ideas to rational design of other metal sulfides applied on 3DGN for high-performance energy storage devices. [ABSTRACT FROM AUTHOR]