发明名称 |
System and method for determining at least one physical quantity |
摘要 |
A system and method for determining at least one physical quantity by means of a relation between a transmission signal and a reception signal, wherein a transmitter emits the transmission signal having a predetermined frequency through a signal path for reception as the reception signal by a receiver. A reference signal generator generates a reference signal having a frequency which has a predetermined fixed relation to the frequency of the transmission signal. The reception signal is mixed with the reference signal to produce an intermediate frequency signal, which is filtered to isolate a difference signal, converted to a digital signal and then processed digitally to determine a phase and/or amplitude relation of the respective physical quantity to be determined. The transmission signal, the reference signal and the digital signal are generated in phase-locked relation using a clock signal derived from a main clock pulse of a master oscillator.
|
申请公布号 |
US6288777(B1) |
申请公布日期 |
2001.09.11 |
申请号 |
US19980217995 |
申请日期 |
1998.12.22 |
申请人 |
Z+F ZOLLER & FROEHLICH GMBH |
发明人 |
FROEHLICH CHRISTOPH;METTENLEITER MARKUS |
分类号 |
G01S17/89;(IPC1-7):G01C3/08;G01S13/08 |
主分类号 |
G01S17/89 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|