IDEA #89KJYO RADIATION-RESISTANT VIBROFREQUENT STRAIN CONVERTERS

RADIATION-RESISTANT VIBROFREQUENT STRAIN CONVERTERS is resonator of string Description Due to using universal strainmodule with n-Ge1-хSiх strain resistors tiny sensitive high-frequency gauges were developed for measurement of force of pressure of liquids and gases in ranges from 0…4⋅104 Pа up to 0…30 МPа. The sensitive element of such devices the electromechanical type with electrostatic excitation of cross-section mechanical fluctuations. The string is implemented from strain sensitive threadlike monocrystal n-Ge1-хSiх by length 1- 5mm, in diameter 8-12mkm and is rigidly fixed by the ends of plate or a deformable surface (in an elastic element) in the distance 50mkm from it. At increase of nuclear percent Si in n-Ge1-хSiх strain sensitivity of the gauge increases too. Each gauge of pressure is supplied with the amplifier which raises resolution, and the coordination with a data-acquisition equipment. The gauge of pressure is radiation proof in comparison with made crystals Ge or Si. the device of Innovative Aspects and Main Advantages Development and creation of corresponding gauges air possible at using as sensitive elements of strings with physicmechanical properties close to ideal ones, and direct transformation of mechanical fluctuations of strings in to an electric signal. Criterion of obtaining of the highest sensitivity (>109Hz/rel.unit deformations of the string converter to the measured size) is the opportunity of using of extremely short and thin crystals. The gauge of pressure contains a monocrystal silicon membrane and string strainconverters from a threadlike monocrystal n-Ge-Si. Use of the technique when position of crystal on the membrane at its deformation by pressure corresponds to a free (loose) condition, has allowed the maximal sensitivity while measuring of pulsations of pressure. In comparison with other string converters used at the present, string monocrystal strainconverters allow to provide higher sensitivity and accuracy of measurement at minimal power consumption. dimensions to obtain external and Areas of application Aviation and space techniques, a robotics, medicine. Р1 Р2 Fig.1 Diagram of the structure of a pressure gauge: 1-membrane- transform junction; 2-resonator; 3-body with branch pipes. Fig.2 Diagram of the structure of the gas analyzer’s receiving part: 1 – membrane with fixed resonators; 2 – window; 3 – body; 4 – membrane divided into two symmetrical volumes; 5 – thermo-outputs. Stage of development It was developed and test experiments conducted at the Institute of Radiation Problems ANAS and at the Lvov Polytechnical Institute in Ukraine. Contact details Institute of Radiation Problems Azerbaijan National Academy of Science Contact person: Dr. Matanat Mehrabova Address: 9 F.Aghayev St. AZ1143 Baku, Azerbaijan Tel: (+994 12) 438 3224, (+994 50) 731 8177 Fax: (+994 12) 432 5187 Email: metanet-mehrabova@rambler.ru www.science.az