Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1992-09-10
1995-05-09
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324682, 324683, 324 7679, 73 6143, G01R 2726, G01N 2722, G01N 3322
Patent
active
054143683
ABSTRACT:
A dielectric constant detecting apparatus comprises an LC circuit for shifting the phase of a high frequency voltage signal according to the dielectric constant of a liquid which passes between the coil and the electrode of the LC circuit. A resistor is connected between the LC circuit and at least one part of a phase comparator. The phase comparator detects the phase shift between high frequency signals provided at both ends of the resistor. The resistor and at least one part of the phase comparator are integrally included in an insulator. The output of the phase comparator is compared with a predetermined phase shift value. A voltage control device adjusts the high frequency voltage signal from the voltage applying device so that the phase shift detected by the phase comparator is further adjusted toward the predetermined phase shift value. At least one of the voltage applying device and the voltage control device produces a signal based on the phase shift which is representative of the dielectric constant of the liquid.
REFERENCES:
patent: 4905655 (1990-03-01), Maekawa
patent: 5005402 (1991-04-01), Pischinger et al.
patent: 5091704 (1992-02-01), Kopera
patent: 5150062 (1992-09-01), Takeuchi
patent: 5225783 (1993-07-01), Suzuki et al.
patent: 5313168 (1994-05-01), Ogawa
patent: 5337017 (1994-08-01), Ogawa
English Language Abstract of Japanese Patent Unexamined Publication No. Sho. 62-25248, Shiyouzou Hara, Feb. 3, 1987, p. 591.
Ogawa Kenji
Suzuki Hiroyoshi
Brown Glenn W.
Mitsubishi Denki & Kabushiki Kaisha
Rowan Grant K.
Turner Richard C.
Wieder Kenneth A.
LandOfFree
Dielectric constant detecting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dielectric constant detecting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectric constant detecting apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1708687