发明名称 |
PROCESS MEASURING PARAMETERS OF NOISE OF LOW-NOISE OBJECTS IN AQUEOUS MEDIUM |
摘要 |
FIELD: underwater acoustics. SUBSTANCE: laser radiation with circular distribution of energy density over beam section and partially absorbed by aqueous medium is used to form acoustic line through which acoustic waves from examined object reach sound detector. Specific feature of process lies in the fact that energy density W J/sq.m is set across section of laser beam in agreement of mathematical relation <EMI ID=0.238 HE=9 WI=21 TI=CHI>, where T<EMI ID=0.239 HE=3 WI=3 TI=CHI>75 deg is temperature at which inversion of sound velocity in water with temperature takes place, deg; C<SB>p</SB> is heat capacity of water under constant pressure, J/kgρ -deg; p is water density, kg/cu.m ; ?? - is absorption factor of laser radiation by water, (m<SP>-1</SP>). EFFECT: improved authenticity of process. 3 dwg
|
申请公布号 |
RU2125731(C1) |
申请公布日期 |
1999.01.27 |
申请号 |
RU19970116224 |
申请日期 |
1997.09.18 |
申请人 |
GOSUDARSTVENNOE PREDPRIJATIE "VSEROSSIJSKIJ NAUCHN;G PREDPRIJATIE VSEROSSIJSKIJ N;RADIOTEKHNICHESKIKH IZMERENIJ |
发明人 |
VLASOV JU.N.;MASLOV V.K.;SIL'VESTROV S.V.;TOLSTOUKHOV A.D. |
分类号 |
G01S3/80;(IPC1-7):G01S3/80 |
主分类号 |
G01S3/80 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|