发明名称 |
Physical properties detection device and physical properties detection method |
摘要 |
A physical properties detection device comprising a probe to be placed near or touching a surface of a ferroelectric; an oscillation loop including the probe and capacitance within the ferroelectric; and detection means for detecting a physical properties of the ferroelectric on the basis of a frequency variation of a measurement signal generated in the oscillation loop, the frequency variation accompanying application of an alternating electric field to the ferroelectric; and the physical properties detection device is further comprising frequency conversion means for converting the frequency of the measurement signal to a low frequency and outputting the resulting signal as a converted measurement signal; frequency control means for controlling the frequency of the converted measurement signal so as to match a target frequency; frequency detection means for generating a frequency detection signal that has a signal level corresponding to the frequency of the converted measurement signal; and synchronous detection means for synchronously detecting the frequency detection signal on the basis of a synchronization signal. |
申请公布号 |
US8138746(B2) |
申请公布日期 |
2012.03.20 |
申请号 |
US20070532129 |
申请日期 |
2007.03.20 |
申请人 |
TATEISHI KIYOSHI;MAEDA TAKANORI;KOBAYASHI HIDEKI;YABE TOMOTAKA;PIONEER CORPORATION |
发明人 |
TATEISHI KIYOSHI;MAEDA TAKANORI;KOBAYASHI HIDEKI;YABE TOMOTAKA |
分类号 |
G01N27/00 |
主分类号 |
G01N27/00 |
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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