发明名称 |
Method and apparatus for determining the dielectric constant of materials, in particular heater ash |
摘要 |
A method and an apparatus for determining the dielectric constant of a material wherein the material is loaded to a short-circuited microstrip and microwaves are fed to the microstrip for providing a reflected signal. The reflected signal is compared with a reference signal both under load and not load conditions of the microstrip for obtaining the modulus and the phase of the reflection coefficient, the dielectric constant being a function thereof. The measure of the phase angle between the reference and the reflected signal in both conditions is obtained by handling the reflected signal with a first phase shifter and a second calibrated phase shifter cooperating with a zero detector. The method and the apparatus of the invention is especially designed for a quick and easy measure of the amount of unburnt coal in the ash coming from a combustion heater.
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申请公布号 |
US4754214(A) |
申请公布日期 |
1988.06.28 |
申请号 |
US19860928351 |
申请日期 |
1986.11.10 |
申请人 |
CONSIGLIO NAZIONALE DELLE RICERCHE;ENEL - ENTE NAZIONALE PER L'ENERGIA ELETTRICA |
发明人 |
BRAMANTI, MAURO;DEL BRAVO, ANDREA |
分类号 |
G01N27/24;G01N22/00;G01N22/02;G01R27/06;G01R27/26;(IPC1-7):G01R27/06 |
主分类号 |
G01N27/24 |
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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