JP2006064684A - Vibration-type viscometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration-type viscometer constituted capable of eliminating a vibration oscillation circuit and is capable of achieving simplification of a control circuit and cost reduction. <P>SOLUTION: An electromagnet, opened to its one side in the housing is provided, a magnet vibrator is attached to one end of the long axis, in close vicinity to the open side of the electromagnet while the other end of the magnet vibrator is inserted in a storage tank of a material to be measured, such as fluid or powder; the long axis thereof is elastically supported by a rubber seal or the like to be attached to the bearing part of a housing; the electromagnet is excited by a commercial AC power supply to vibrate the magnet vibrator; a dynamo element, such as a film-like piezoelectric dynamo element or the like, is attached in close vicinity to the magnet vibrator, the magnitude of the vibration amplitude of the magnet vibrator, the magnitude of the viscosity of the material to be measured in the storage tank or the presence of the material to be measured is detected, by amplifying the electrical signal emitted from the piezoelectric dynamo element or the like. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vibratory viscometer that measures or discriminates the viscosity of an object to be measured such as fluid or powder and the presence or absence of the object to be measured.

A conventional vibration type viscometer is a vibration type viscometer using a vibration oscillation circuit as means for vibrating a vibrator as disclosed in Japanese Patent Application Laid-Open No. 2000-283907 and Japanese Patent Publication No. 07-006905.
That is, the conventional vibration viscometer requires a vibration oscillation circuit.
JP 2000-283907 A No. 07-006905 Japanese Patent No. 2933856 Japanese Patent No. 2864546

  As shown in Japanese Patent Application Laid-Open No. 2000-283907 and Japanese Patent Publication No. 07-0068052, conventional vibration viscometers require a vibration oscillation circuit and are complicated. In addition, adjustment of the oscillation frequency is required, and there are many problems such as difficulty in manufacture and high cost.

The technical means for solving this problem are as follows.
That is, an electromagnet with one open side is provided inside the housing, a magnet vibrator is attached to one end of the long axis in the vicinity of the open side of the electromagnet, and the other end is placed in a storage tank for an object to be measured such as fluid or powder. This long shaft is elastically supported by a rubber seal or the like and attached to the bearing portion of the housing, and the magnet is vibrated by exciting the electromagnet with a commercial AC power source. An electric signal generated by the piezoelectric power generation element is attached when a power generation element such as a piezoelectric power generation element is attached and the vibration amplitude of the magnet vibrator is large, that is, the viscosity of the measurement object in the storage tank is large or there is no measurement object. It is a vibration type viscometer characterized in that it is detected by amplification.

  Also, a secondary power source is provided by winding a secondary winding for generating a low voltage on the primary winding of an electromagnet that vibrates the magnet vibrator, or an intermediate terminal is provided between the primary windings. A vibration type viscometer characterized by providing a secondary power source and using the secondary power source as a power source for a control circuit.

  Furthermore, an electric signal output from a piezoelectric power generation element or the like provided in the vicinity of the magnet vibrator is amplified by an amplifier circuit, and a relay is operated via an output instruction meter or a switching circuit. It is a viscometer.

  In the vibration type viscometer of the present invention, the vibration electromagnetic force that gives the vibrator a vibration force uses a commercial AC power source or a frequency of private power generation (50 Hz or 60 Hz, etc.), so that a conventional vibration oscillation circuit is unnecessary. Yes, the control circuit can be simplified and the cost can be reduced.

  Also, a secondary power source is provided by winding a secondary winding for generating a low voltage on the primary winding of an electromagnet that vibrates the magnet vibrator, or an intermediate terminal is provided between the primary windings. Since a secondary power supply is provided and this secondary power supply is used as a power supply for the control circuit, the control circuit can be simplified and the cost can be reduced.

  In addition, the electrical signal generated by the vibration of the piezoelectric power generation element is amplified by the amplifier circuit and the output instruction meter or relay is operated, so that the viscosity of the object to be measured in the storage tank for storing liquid or powder can be reduced. It is possible to provide an extremely useful vibration viscometer that has not been available so far, such as the presence / absence of an object to be measured can be detected with high accuracy.

  No vibration oscillation circuit is required to vibrate the vibrator, and the power supply for the control circuit is a low-voltage secondary power supply taken from the electromagnet winding that vibrates the vibrator, and the vibration amplitude of the vibrator is measured. We realized a viscometer that can be detected as small or large in the viscosity of the object.

The best mode for carrying out the present invention will be described based on an embodiment with reference to the drawings.
FIG. 1 is a sectional view of a vibration type viscometer of the present invention. FIG. 2 is a detailed sectional view of part B of the vibration type viscometer of the present invention. FIG. 3 is a circuit diagram of the present invention. FIG. 4 is a detailed perspective view of the attachment of the piezoelectric power generation element.
1, 2, and 3, an electromagnet 2 that is open on one side is provided inside the housing 1, and a magnet vibrator 4 is attached to one end of the long shaft 5 in the vicinity of the open side 3 of the electromagnet 2, and the other end Is inserted into a storage tank of an object A to be measured, such as a fluid or powder, and the long axis 5 is elastically supported by a rubber seal 6 or the like and attached to a bearing portion 7 of the casing, and the electromagnet 2 is connected by a commercial AC power source. The magnet vibrator 4 is vibrated to be excited, and a film-like piezoelectric power generation element 8 is attached in the vicinity of the magnet vibrator 4 so that the magnitude of the vibration amplitude of the magnet vibrator 4, that is, the object A in the storage tank is measured. The vibratory viscometer is characterized in that a small or large viscosity or presence / absence of an object to be measured is detected as an electric signal generated from the piezoelectric power generation element 8.

  Further, a secondary power source is provided by winding a secondary winding for generating a low voltage on the primary winding of the electromagnet 2 for vibrating the magnet vibrator 4, or an intermediate terminal is provided between the primary windings. This is a vibration viscometer that is provided with a secondary power source and uses this secondary power source as a power source for the control circuit 9.

Further, it is a vibration type viscometer that operates an output instruction meter or a relay 11 through an amplification circuit 10 with an electric signal output from a piezoelectric power generation element 8 provided close to the magnet vibrator 4.
In addition, 12 of FIG. 1 is a blade | wing for improving the detection sensitivity attached to the front-end | tip of the long axis 5. FIG.

  As shown in FIG. 4, the piezo power generating element 8 has a film shape, a weight 13 is attached to the tip, and the other end is attached to the magnet vibrator as shown in FIG. Accordingly, the weight 13 tries to be stationary with a stationary inertia, while the magnet vibrator 4 vibrates. Therefore, the piezoelectric power generation element 8 is subjected to bending deformation proportional to the magnitude of the vibration, and the generated voltage is greatly changed to high or low ( (AC 0-30V etc.) is devised.

  As shown in FIG. 5, the bending deformation amount δ of the piezoelectric power generation element 8 and the generated voltage V are substantially proportional to each other, and the generated voltage V increases when the deformation amount δ is large. That is, when the viscosity v of the object to be measured is low, the deformation amount δ increases and the generated voltage V increases, and when the viscosity v is high, the deformation amount δ decreases and the generated voltage V decreases. Therefore, the level of the generated voltage V represents the magnitude of the viscosity v of the object to be measured and can be instructed by the indicating meter 11.

Although the embodiment of the present invention discloses a vibratory viscometer using a commercial power source, for example, it can be connected to a private power source of 90 Hz or 100 Hz having a different frequency. In addition, the present invention has applicability in a wide range of industrial fields, such as detecting and determining the strength of vibrator vibration and measuring liquid viscosity and powder specific gravity of food and medicine.
In the embodiments, the viscometer is used to measure the viscosity and viscosity of liquids and powders. However, since the measurement accuracy is good, it can be used as a so-called level sensor for detecting the water level and the powder level.

It is sectional drawing of the vibration type viscometer of this invention. It is a B section detailed sectional view of a vibration type viscometer of the present invention. It is a circuit diagram of the vibration type viscometer of the present invention. It is a detailed perspective view of the piezoelectric power generation element attached to the vibration type viscometer of the present invention. It is a piezoelectric power generation element power generation voltage curve of the vibration type viscometer of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 2 Electromagnet 4 Magnet vibrator 5 Long axis 6 Rubber seal 7 Bearing part 8 Piezoelectric power generation element 9 Control circuit 10 Amplifying circuit 11 Indicator meter or relay 12 Blade 13 Weight

Claims (3)

  An electromagnet with one open side is provided inside the housing, and a magnet vibrator is attached to one end of the long axis close to the open side of the electromagnet, and the other end is inserted into a storage tank for an object to be measured such as fluid or powder. The long shaft is elastically supported by a rubber seal and attached to the bearing portion of the housing. The magnet is vibrated by exciting the electromagnet with an AC power source such as a commercial AC power source, and close to the magnet vibrator. Then, a power generation element such as a film-shaped piezoelectric power generation element is attached, and the vibration amplitude of the magnet vibrator, that is, whether the viscosity of the object to be measured in the storage tank is small or has no object to be measured is described above. A vibratory viscometer characterized by amplifying and detecting an electric signal emitted from the device.   A secondary power source is provided by winding a secondary winding for generating a low voltage on a primary winding of an electromagnet that vibrates a magnet vibrator, or an intermediate terminal is provided between the primary windings to provide a secondary power source. The vibratory viscometer according to claim 1, wherein the secondary power source is used as a power source for the control circuit.   3. An electric signal output from a piezoelectric power generation element or the like provided in the vicinity of the magnet vibrator is amplified by an amplifier circuit to operate an output instruction meter or a relay. The vibratory viscometer described.

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