Abstract:
PURPOSE: A method for disposing waste of toxic methylphosphonyl difluoride(DF) is provided to minimize waste and simplify total process using a single reaction group. CONSTITUTION: A method for disposing waste of methylphosphonyl difluoride comprises: a step of hydrolyzing the methylphosphonyl difluoride in neutral aqueous solution to generate methylphosphonic acid and hydrofluoric acid; a step of injecting water and distilling to separate and collecting hydrofluoric acid; a step of adding water to methylphosphonic acid having residual reaction group and liquid-incinerating; and a step of repeating the distillation step.
Abstract:
복수개의 광섬유 격자센서와 압전센서를 사용하여 항공기 운항 중에 항공기의 손상을 실시간으로 감시할 수 있도록 하여 항공기의 안전성을 보장할 수 있는, 항공기의 구조 건전성 감시 시스템을 제공한다. 본 발명에 따른 항공기의 구조 건전성 감시 시스템은 항공기 날개의 변형을 감지하는 변형감지부; 상기 항공기 날개에 가해지는 충격을 감지하는 충격감지부; 상기 항공기 날개와 동체의 연결부분에 설치되며, 균열 및 볼트 풀림을 감지하는 손상감지부; 및 상기 변형감지부로부터 신호를 받고, 상기 충격감지부로부터 신호를 받고, 상기 손상감지부로부터 신호를 받아서, 상기 변형 또는 충격이 크거나 균열 및 볼트 풀림이 발생하면 항공기의 운항을 중지시키고, 상기 변형 또는 충격이 작거나 균열 및 볼트 풀림이 발생하지 않으면 항공기의 운항을 계속시키는 제어부;를 포함한다.
Abstract:
The SiC whisker reinforced crystallized glass composite is produced by (a) homogeneously mixing and dispersing the high purity silica colloid and the boehmite colloid disperse system and silicon carbide whisker disperse system by inducing the heterointeraction between particles with zeta potentials, (b) adding the salts of metals(lithium, magnesium) to the mixture for homogeneous dispersion, (c) preparing the composite powder by gelation and dry process, (d) sintering the composite powder. The other sol-gel process for composite powder comprises (a') gelation by adding SiC whisker disperse system to sol prepared by hydrolytic condensation of metallic alkoxide compound(silicon or aluminum alkoxide) for the high purity composite powder, (b') sintering this composite powder.
Abstract:
PURPOSE: A method for monitoring the structural stability of an aircraft is provided to monitor damage to an aircraft caused by a flying load or shock load in real-time by using multiple lattice sensors and piezoelectric sensors. CONSTITUTION: A method for monitoring the structural stability of an aircraft is as follows. The deformation of aircraft wings and shock applied to the aircraft wings is sensed (S11). The size of the sensed deformation and the position of the shock are stored (S12). If the size of the deformation is more than a first reference value, the flying of an aircraft is stopped. If the size of the deformation is less than a second reference value, the flying of the aircraft is continued. If the size of the deformation is between the first and second reference values, the flying of the aircraft is stopped when cracks and bolt loosening are sensed. And the flying of the aircraft is continued when cracks and bolt loosening are not sensed (S13). [Reference numerals] (S11) First step of sensing the deformation of aircraft wings and shock applied to the aircraft wings; (S12) Second step of confirming and storing the size of the deformation and the position of the shock; (S13) Third step of stopping the flying of an aircraft if the size of the deformation is more than a first reference value, continuing the flying of the aircraft if the size of the deformation is less than a second reference value, stopping the flying of the aircraft if cracks and bolt loosening are sensed, and continuing the flying of the aircraft if cracks and bolt loosening are not sensed; (S14) Fourth step of precisely inspecting damages to the deformation position, the connection portion of the aircraft wings and an aircraft body, and/or the shock position