发明名称 |
Device for measuring the range of a moving target and the speed at which it approaches or recedes |
摘要 |
A radio range measuring apparatus having a controlled modulation slope in order to keep the beat frequency between the transmitted signal and the received signal constant. The apparatus also measures the speed at which a mobile target approaches or recedes by means of a generator of a fixed frequency which, after frequency division, maintains the duration between the start of two consecutive sawtooth modulation signals fixed. A particular spectral line of the beat signal is demodulated by this fixed frequency via a mixer whose output is filtered by a passband filter. The signal at the output of the filter has a frequency which is equal to the Doppler frequency, proportional to the speed.
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申请公布号 |
US4205314(A) |
申请公布日期 |
1980.05.27 |
申请号 |
US19770862005 |
申请日期 |
1977.12.19 |
申请人 |
TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T R T |
发明人 |
STRAUCH, RAYMOND |
分类号 |
G01S13/34;G01S13/50;G01S13/58;G01S13/62;(IPC1-7):G01S9/44;G01S9/02;G01S9/23 |
主分类号 |
G01S13/34 |
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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