Mass measuring instrument for use under microgravity conditions.
A prototype instrument for measuring astronaut body mass under microgravity conditions has been developed and its performance was evaluated by parabolic flight tests. The instrument, which is the space scale, is applied as follows. Connect the subject astronaut to the space scale with a rubber cord. Use a force transducer to measure the force acting on the subject and an optical interferometer to measure the velocity of the subject. The subject's mass is calculated as the impulse divided by the velocity change, i.e., M=integral Fdt/delta v. Parabolic flight by using a jet aircraft produces a zero-gravity condition lasting approximately 20 s. The performance of the prototype space scale was evaluated during such a flight by measuring the mass of a sample object.
Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma 376-8515, Japan.
Yusaku
Y
Fujii
Kazuhito
K
Shimada
Masayuki
M
Yokota
Seiji
S
Hashimoto
Yoichi
Y
Sugita
Hitomi
H
Ito
D018480:Astronauts; D001835:Body Weight; D001837:Body Weights and Measures / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D013026:Space Flight / Q000295:instrumentation; D014893:Weightlessness