发明名称 |
High-precision measuring method and apparatus |
摘要 |
A method and apparatus of measuring a predetermined parameter having a known relation to the transit time of movement of an energy wave through a medium, by transmitting from a first location in the medium a cyclically-repeating energy wave; receiving the cyclically-repeating energy wave at a second location in the medium; detecting a predetermined fiducial point in the cyclically-repeating energy wave received at the second location; continuously changing the frequency of transmission of the cyclically-repeating energy wave from the first location to the second location in accordance with the detected fiducial point of each received cyclically-repeating energy wave received at the second location such that the number of waves received at the second location from the first location is a whole integer; and utilizing the change in frequency to produce a measurement of the predetermined parameter.
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申请公布号 |
US2002105340(A1) |
申请公布日期 |
2002.08.08 |
申请号 |
US20010983430 |
申请日期 |
2001.10.24 |
申请人 |
GIRAD SYSTEMS (1990) LTD. |
发明人 |
ARIAV ARIE |
分类号 |
G01K11/22;A61B5/08;A61B5/11;A61B8/00;G01B21/02;G01F1/66;G01K11/26;G01N22/00;G01N29/00;G01N29/02;G01N29/024;G01N29/34;G01S15/08;(IPC1-7):G01R27/04;G01R27/32 |
主分类号 |
G01K11/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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