Абсолютный баллистический гравиметр АБГ-ВНИИМ-1 разработки ВНИИМ имени Д.И. Менделеева
Abstract
A new free-fall absolute ballistic gravimeter ABG-VNIIM-1 was fabricated at the D.I. Mendeleyev Research Institute for Metrology (VNIIM). For this gravimeter we have developed an original mechanical system of ballistic unit, a compact iodine-stabilized in frequency Nd:YVO4/KTP diode-pumped solid-state laser at the wavelength of 532 nm and the laser interferometer. The path of free fall of the test body in a vacuum chamber is about 10 cm. The electronic system for the fast acquisition of the length and time intervals during the free fall is based on the NI PXI platform. A special software GROT was developed to control of all the systems and to evaluate the measured gravity acceleration. A passive vibration isolation of the reference reflector in the laser interferometer is based on the seismometer. The gravimeter ABG-VNIIM-1 was tested at the gravimetric site "Lomonosov-1" in Lomonosov branch of VNIIM. The estimated total instrumental uncertainty of ABG VNIIM-1 was determined to be 2·10-8 m s-2. The typical residuals in the least square evaluation of the trajectory of the test body in a single drop at the site "Lomonosov-1" are from 0.3 to 0.8 nm.
About the Authors
Л. Витушкин
Всероссийский научно-исследовательский институт метрологии им. Д.И. Менделеева (С.-Петербург)
Russian Federation
Russian Federation
О. Орлов
Всероссийский научно-исследовательский институт метрологии им. Д.И. Менделеева (С.-Петербург)
Russian Federation
Russian Federation
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For citations:
, . Giroskopiya i Navigatsiya / Gyroscopy and Navigation. 2014;22(2):95-101. (In Russ.)
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