发明名称 |
Dynamic filter tuning for pulse-echo ranging systems |
摘要 |
Dynamic tuning of a tunable filter within the receiver of a pulse-echo ranging system. A filter tuning module compares a transmit signal and a filtered signal to obtain a phase difference indicative of any mis-match between the resonant frequency of the tunable filter and the transmit frequency. The filter tuning module outputs a phase correction signal corresponding to the phase difference and a controller uses the phase correction signal to determine any adjustments necessary to minimize the phase difference. Adjustments to the tunable filter may be made with each 'shot' or transmission.
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申请公布号 |
US7139220(B2) |
申请公布日期 |
2006.11.21 |
申请号 |
US20040825471 |
申请日期 |
2004.04.15 |
申请人 |
SIEMENS MILLTRONICS PROCESS INSTRUMENTS INC. |
发明人 |
TOLCIU GABRIEL |
分类号 |
G01S15/00;G01S7/52;G01S7/526 |
主分类号 |
G01S15/00 |
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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