JPS5594138A - Vibration type densimeter - Google Patents
Vibration type densimeterInfo
- Publication number
- JPS5594138A JPS5594138A JP208679A JP208679A JPS5594138A JP S5594138 A JPS5594138 A JP S5594138A JP 208679 A JP208679 A JP 208679A JP 208679 A JP208679 A JP 208679A JP S5594138 A JPS5594138 A JP S5594138A
- Authority
- JP
- Japan
- Prior art keywords
- output
- subtractor
- adder
- vibrator
- outputs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To provide a vibration type densimeter which has excellent temperature characteristics without drift by providing a vibrator and a drive unit for simultaneously vibrating the vibrator in a plurality of vibration modes and obtaining the density of a fluid to be measured around the vibrator from the plural natural vibration frequencied thereof.
CONSTITUTION: This densimeter comprises a cylindrical vibrator 1 fixed at its one end, piezo-electric element 2, 3 for detecting vibration, and driving piezo-electric elements 4, 5 to be mounted in the vicinity of the center of the loop of the vibration mode to be obtained, wherein the elements 2W5 incorporate the same characteristics and are provided in space at 90° each other. The outputs from the elements 2, 3 are applied to a charge amplifier 6. The outputs from the amplifier 6 are multiplied by predetermined values at coefficient circuits 8, 9, respectively, and processed in an adder 10 and a subtractor 11. The outputs from the adder 10 and the subtractor 11 are respectively applied through low pass filters 12, 13, respectively to amplifiers 14, 15, respectively, which produces voltages having constant amplitude. These voltage outputs from the amplifiers 14, 15 are added by an adder 16. The sum output from the adder 16, is applied to the element 4. The output from the amplifier 14 is subtracted by the output from the amplifier 15 by a subtractor 17, which produces a subtracted output signal. The signal from the subtractor 17 is applied to the element 5. The output signals Ve, Vf from the amplifiers 14, 15, respectively are applied to an output circuit 18, which thereupon produces a signal corresponding to the density of fluid to be measured.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP208679A JPS5594138A (en) | 1979-01-11 | 1979-01-11 | Vibration type densimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP208679A JPS5594138A (en) | 1979-01-11 | 1979-01-11 | Vibration type densimeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5594138A true JPS5594138A (en) | 1980-07-17 |
| JPS617251B2 JPS617251B2 (en) | 1986-03-05 |
Family
ID=11519528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP208679A Granted JPS5594138A (en) | 1979-01-11 | 1979-01-11 | Vibration type densimeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5594138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009122109A (en) * | 2007-11-16 | 2009-06-04 | Labor Fuer Messtechnik Dr Hans Stabinger Gmbh | Method of determining density of liquid medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH051975Y2 (en) * | 1986-11-27 | 1993-01-19 | ||
| RU2061218C1 (en) * | 1992-07-22 | 1996-05-27 | Всероссийский научно-исследовательский институт природных газов и газовых технологий | Device for determination of properties of fluid media |
-
1979
- 1979-01-11 JP JP208679A patent/JPS5594138A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009122109A (en) * | 2007-11-16 | 2009-06-04 | Labor Fuer Messtechnik Dr Hans Stabinger Gmbh | Method of determining density of liquid medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS617251B2 (en) | 1986-03-05 |
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