Measuring-computing complexes for checking CHARACTERISTICS nitrocellulose POWDERS

摘要

Measuring and computing system for monitoring characteristics nitrocellulose gunpowders relates to the field of measuring technology and is intended for the humidity control powders, and depending on the moisture composition of the combustion products, density, thermal, energy and ballistic characteristics of powders after long-term storage in a conventionally hermetic vessels (in artillery sleeves as part of propellants, in metal boxes). Measuring and computing system consists of a glass (metal or plastic) of the measuring cell 1 with the rubber cap 2, lifting the test powder 3 and the sensor temperature and humidity 4, digital device 5 for measuring the humidity and air temperature, USB-cable 6 and the PC 7 software. For the measurement shown in weighed powder of conditionally hermetic vessel and placed in a measuring cell with a humidity sensor and the air temperature. The measuring cell is sealingly closed by a cover. With the measuring device removed temperature and humidity readings as long as their values ​​do not stabilize. Humidity powder is calculated according to the formula h _ud = a φ-b, where φ - relative humidity with powder between the elements in the measuring cell;a, b - experimental coefficients describing the dependence of the equilibrium moisture content of the powder relative humidity. Characteristics pyroxylin and ballistic powders (conditional formula 1 kg of powder, the composition of the products of combustion of gunpowder, the combustion temperature, combustion heat, specific volume, covolume and polytropic exponent of propellant gases, a "force" powder, "unit" burning rate, density, specific heat, thermal conductivity, thermal) depending on the humidity calculated thermodynamic method on a PC using the software "calculation powders characteristics". The time of the measurement and calculation of the characteristics of powders is less than 10 minutes. 4 yl.