Korea Aerospace Research Institute

Youn Kyu Kim

Jong Woo Kim

Gi Hyuk Choi

Hong Yul Paik

Hae Jin Choi

The present invention relates to a mass measurement system and method capable of precisely measuring the mass of a sample in a gravity-free environment. The mass measurement system using measurement of frequency shift of a vibrator according to the present invention includes a vibrator vibrating at a predetermined resonance frequency with a mass of a sample added thereto, a frequency counter for measuring a resonance frequency of the vibrator caused by vibration, a standard mass database for storing therein known standard masses and standard mass frequency shifts corresponding to variation in the standard masses, and a main controller for calculating a sample mass frequency shift corresponding to the added sample mass on the basis of the resonance frequency received from the frequency counter, searching the standard mass frequency shifts stored in the standard mass database, comparing the calculated sample mass frequency shift with the searched standard mass frequency shifts, extracting a predetermined standard mass, outputting the extracted standard mass as the mass of the sample, and controlling the entire system. Accordingly, the present invention can precisely measure the mass of a small-sized sample, in particular, an animal sample, in a gravity-free environment.

Mass measurement system and method using measurement of frequency shift of vibrator

The mass measurement system includes a linear acceleration motion unit that is a linear motion driving source, a first load cell fastened to the linear acceleration motion unit to measure an inertial force of a sample caused by linearly accelerated motion of the 10 linear acceleration motion unit, a second load cell fastened to the linear acceleration motion unit while being spaced apart from the first load cell by a predetermined distance, the second load cell measuring an inertial force of a standard sample having a known standard mass caused by the linearly accelerated motion of the linear acceleration motion unit, and a main control unit for calculating and outputting mass of the sample through an arithmetic operation based on the inertial forces, measured by the first and second load cells, and the standard mass, and controlling an entire operation of the system.

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Daejeon, South Korea

Youn Kyu Kim