Title:
DEVICE FOR MEASURING THE VISCOSITY OF FLOWING MEDIA, VISCOSITY SENSOR AND METHOD FOR MANUFACTURING THE ELECTRODES OF A TACHOMETER FOR SAID VISCOSITY SENSOR
Document Type and Number:
WIPO Patent Application WO/2000/037919
Kind Code:
A1
Abstract:
The present invention relates to devices for measuring the viscosity of flowing media, wherein said devices include a viscosity sensor of the rotating type. This invention is used for measuring with increased accuracy the viscosity of insignificant volumes of Newtonian and viscoplastic media in which the temperature and pressure vary in a wide range. To this end, the viscosity measuring device includes a viscosity sensor realised from an asynchronous motor and a tachometer having their rotors connected together and arranged in the measuring chamber of said viscosity sensor. This device also includes an information-signal generation unit in the form of an AC bridge circuit comprising shoulders which are identical and which are each made of a resistor and of a capacitor with variable capacity connected in series. The capacitors with variable capacity are formed by the electrodes of the tachometer stator and by at least one pole of the rotor thereof. This pole is connected to one of the poles of the supply bridge of the generator through a capacitor with fixed capacity which is defined by the surface of the rotor of the asynchronous motor and by the wall of the body of the viscosity sensor. The other pole of the generator is galvanically connected to the common point of the resistors of the different shoulders of the AC bridge. The other ends of the resistors are connected to the inputs of a phase-sensitive converter. The rotor of the tachometer is connected to the rotor of the asynchronous motor and is arranged in the central portion of the body.
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Inventors:
ORLOV OLEG FEDOROVICH (RU)
NENASHEV ALEXANDER VASILIEVICH (RU)
BERG VLADIMIR IVANOVICH (RU)
NENASHEV ALEXANDER VASILIEVICH (RU)
BERG VLADIMIR IVANOVICH (RU)
Application Number:
PCT/RU1999/000470
Publication Date:
June 29, 2000
Filing Date:
December 07, 1999
Export Citation:
Assignee:
ZAKRYTOE AKTSIONERNOE OBSCHEST (RU)
ORLOV OLEG FEDOROVICH (RU)
NENASHEV ALEXANDER VASILIEVICH (RU)
BERG VLADIMIR IVANOVICH (RU)
ORLOV OLEG FEDOROVICH (RU)
NENASHEV ALEXANDER VASILIEVICH (RU)
BERG VLADIMIR IVANOVICH (RU)
International Classes:
G01N11/14; H02K7/14; (IPC1-7): G01N11/14; H01G9/055; H02K15/00
Foreign References:
| SU1276957A1 | 1986-12-15 | |||
| US4499753A | 1985-02-19 | |||
| US5167143A | 1992-12-01 | |||
| SU1283620A1 | 1987-01-15 | |||
| US4199800A | 1980-04-22 | |||
| JPH0767361A | 1995-03-10 |
Attorney, Agent or Firm:
Patent, Law Firm 'JUS' (PLF "JUS" Moscow, 9, RU)
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