发明授权
- 专利标题： Method and device for correcting non-ideal intermediate-frequency signals in distance sensing device according to the FMCW principle
- 专利标题（中）： 根据FMCW原理，在距离感测装置中校正非理想中频信号的方法和装置
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申请号： US11942266申请日： 2007-11-19
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公开(公告)号： US07639177B2公开(公告)日： 2009-12-29
- 发明人: Roland Welle , Karl Griessbaum , Josef Fehrenbach
- 申请人： Roland Welle , Karl Griessbaum , Josef Fehrenbach
- 申请人地址： DE Wolfach
- 专利权人： Vega Grieshaber KG
- 当前专利权人： Vega Grieshaber KG
- 当前专利权人地址： DE Wolfach
- 代理机构： Fay Kaplun & Marcin, LLP
- 优先权： DE102006058852 20061213
- 主分类号： G01S13/08
- IPC分类号： G01S13/08 ; G01S7/40 ; G01F23/00
摘要：
In fill-level measuring devices that operate according to the FMCW principle, nonlinearity of the sensor signal depending on the time can result in measuring inaccuracies. The fill-level measuring device that operates according to the FMCW principle comprises a correction unit for the mathematical correction of the amplitude values or for calculating points in time of scanning the amplitude values on the basis of a reference correlation determined at the factory. In this way intermediate-frequency values that are identical to those of an ideal sensor can be derived.
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