发明名称 |
Distance calculating method and system |
摘要 |
In a system, a frequency-modulating unit is configured to frequency-modulate a radar wave signal within a predetermined frequency modulation range from bottom to top so that a frequency of the frequency-modulated radar wave changes in time. The rate of frequency change of the radar wave signal in time is set to F0/Tf. The F0 represents a center frequency in the frequency modulation range. The Tf represents the predetermined constant time. A mixing unit is configured to mix the transmitted frequency-modulated radar wave signal and the reflection signal to obtain a beat signal. The beat signal is based on a frequency difference between a frequency of the transmitted radar wave signal and that of the reflection signal. A sweeping unit is configured to sweep the beat signal within the frequency modulation range from one of the bottom and the top to the other thereof to obtain a frequency component of the beat signal. An obtaining unit is configured to obtain the prediction distance based on a relationship between the frequency component of the beat signal and the prediction distance.
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申请公布号 |
US2004125010(A1) |
申请公布日期 |
2004.07.01 |
申请号 |
US20030690843 |
申请日期 |
2003.10.23 |
申请人 |
NATSUME KAZUMA;HAZUMI HIROSHI |
发明人 |
NATSUME KAZUMA;HAZUMI HIROSHI |
分类号 |
G08G1/16;G01S13/34;G01S13/93;(IPC1-7):G01S13/93 |
主分类号 |
G08G1/16 |
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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