CN1037127C - Vibration shell density sensor - Google Patents
Vibration shell density sensor Download PDFInfo
- Publication number
- CN1037127C CN1037127C CN93114239A CN93114239A CN1037127C CN 1037127 C CN1037127 C CN 1037127C CN 93114239 A CN93114239 A CN 93114239A CN 93114239 A CN93114239 A CN 93114239A CN 1037127 C CN1037127 C CN 1037127C
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- cylindrical shell
- shell
- sensor
- inner support
- coil
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- 238000012360 testing method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 3
- 230000005284 excitation Effects 0.000 abstract 3
- 230000004907 flux Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to a vibrating shell density sensor which comprises a pipeline type sensor shell 8, a cylindrical shell vibrator 6, an excitation coil, a detection coil, an electronic servo circuit, an upper external support and a lower external support, wherein the pipeline type sensor shell 8 facilitates the connection with a pipeline, and the cylindrical shell vibrator 6 is arranged in the shaft center of the shell 8 symmetrically to the shell 8; the excitation coil, the detection coil and the electronic servo circuit form a positive feedback system of a closed loop, and the cylindrical shell vibrator is positioned in a determined position by the upper external support and the lower external support. The present invention is characterized in that the outer wall of the cylindrical shell and the shell of the sensor form a circulatory pipeline of an object to be detected, and the excitation coil, the detection coil and an internal support are sealed in the cylindrical shell; the vibration of the vibrator is the resonance with an even order in principal vibration mode. The sensor is suitable for the on-line measurement of liquid density at high flow rate and full flux liquid density.
Description
The present invention relates to a kind of sensor, specifically is a kind of frequency type density sensor, and its oscillator is the elastic vibration shell.
Method and the corresponding instrument and the matched sensor of existing multiple on-line measurement fluid density, such as: with bit table rays method, microwave method, vibration embrane method, vibration string method and vibrating tube method.These methods exist subject matter to have:
1, isotope rays method measuring accuracy is low, cost is high, use is inconvenient;
2, narrow, the poor stability of microwave method measurement range:
3, poor, the complex process of vibration embrane method sample representation must add impact damper during application, is not easy to use:
4, vibration string method complex structure is influenced by the mechanical vibration of environment and liquid flow, and the precision stability loss is big, and installation accuracy requires very high;
What 5, the vibrating tube method was used is comparatively general, but its flow is little, and sample representation is also poor, and easily the fouling knot is cured, and the vibration shape is asymmetric, the frequency shakiness.
The object of the present invention is to provide a kind of densitometric vibration shell density sensor of frequency type that is applied to, be specially adapted to big flow, the fluxoid on-line measurement.Under normal conditions, measuring accuracy is not subjected to fouling or ties cured influence.
Following mode can better realize above-mentioned purpose.
Sensor vibration generator adopts the elastic cylinder shell structure.Cylindrical shell and sensor outer housing constitute duct type measured object flow field.The measured object that is attached to this ticker outer wall flows along shell wall, and its quality is the additional mass of cylindrical shell.The resonance frequency of ticker changes with measured object density.Record density of liquid value this moment with this.Composition of the present invention comprises: a closed loop feedback system of being made up of cylindrical shell oscillator, field coil, magnetic test coil and electronic servo circuit also has the bracing frame that is connected usefulness between a duct type sensor outer housing and this shell and the oscillator.Cylindrical shell oscillator frequency is handled through electronic circuit and is amplified with the output of pulse signal form, and this signal and measured object density are certain funtcional relationship.The cylindrical shell oscillator is an elastic cylindrical shell, is located in duct type sensor outer housing center.An inner support that is used for fixing field coil and magnetic test coil group is installed in the cylindrical shell of oscillator.Inner support and cylindrical shell two ends place are fixed with one.Coil groups all is closed in the cylindrical shell together with inner support.The two ends of oscillator adopts the spoke type support to be connected with shell.Sensor outer housing inwall and cylindrical shell oscillator outer wall are formed the circulation duct of measured object.Cylindrical shell becomes symmetrical structure with the shell layout.Except that two ends was connected, other position did not have any contact point between inner support and cylindrical shell.Being fixed on being electrically connected between each coil groups and the servo circuit on the inner support is to utilize the cable of the circular seal pipe in inner support axle center to realize.
When oscillator of the present invention was in resonant condition, cylindrical shell produced radially and tangential displacement.Measured object is attached to the cylindrical shell outer wall and participates in vibration.Vibration frequency is by the form output of electronic servo circuit with pulse signal.Because oscillator is in the center, flow field.The measured object temperature drop is minimum, and the less scaling knot of oscillator is cured.Knot is cured even outer casing inner wall produces fouling, does not influence the sensor measurement precision generally speaking.Thereby in comparatively abominable environment for use, still can guarantee measuring accuracy.This sensor measurement scope is big, repdocutbility good, stable performance, easy for installation.Be suitable for online big flow, fluxoid measurement, and do not have loss of significance.
Accompanying drawing 1 is the cut-open view of the embodiment of the invention.
Other details below in conjunction with accompanying drawing detailed description technical scheme.
During on-line measurement, shell 8 is connected in the transfer pipeline of measured object.The design of shell 8 both ends of the surface has the ring flange 7 (13) that usefulness is installed.The outer wall of shell 8 is installed electronic servo circuit box (10).There is a cylindrical shell oscillator (6) at shell 8 axis places, and its two ends are connected with shell 8 through support arm 4 (12).Be equipped with in the cylindrical shell is that two ends and the weldering of post shell are the inner support 5 of one.Inner support 5 is wound with field coil and magnetic test coil group 1 (2) (3).Coil groups is to be drawn out to shell 8 by sealed insulation pipe 11 to the connecting line of circuit board.Insulation tube becomes semi-circular curvature.Its other end is connected with inner support axis place.This device electric wiring completely cuts off with measured object satisfy requirement of explosion proof fully.Label 9 among the figure is the circuit wire hole.Fluid to be measured all flows through from the pipeline of cylindrical shell and shell formation.Visual flow size is suitably selected the radial dimension of cylindrical shell and shell.Realize big flow fluxoid measurement.Oscillator is positioned at the center in flow field, and it is minimum to lower the temperature, and less scaling knot is cured.Through using in high and cold oil field, can not only on-line measurement oil-water mixture density value, and again can with the supporting calculating water percentage of intelligence instrument.Install and can predict product category and quality thereof in the known range according to the measured object density value in general logistics pipeline, controlling automatically for production run provides accurate foundation.
The present invention has than high-technology index.Below be the experimental prototype measured value:
Limiting error: ± 05Kg/m
3Measurement range: 700～1100Kg/m
3Temperature coefficient: uncompensated ± 0.2Kg/m
3℃
Compensation ± 0.2Kg/m is arranged
3℃ pressure coefficient: uncompensated ± 0.2Kg/m
3MPa
Compensation ± 0.2Kg/m is arranged
3MPa
Claims (2)
1, a kind of vibration shell density sensor of measuring fluid density, comprise the closed loop positive feedback system of forming by cylindrical shell oscillator, field coil, magnetic test coil and electronic servo circuit, also have a duct type sensor outer housing and bracing frame thereof, the resonant frequency signal of cylindrical shell oscillator is handled via electronic circuit and is amplified, export with the pulse signal form, this signal and measured object density are one and determine funtcional relationship, it is characterized in that:
The described cylindrical shell oscillator of A is an elastic cylindrical shell (6) that is positioned duct type sensor outer housing center, an inner support (5) that is used for fixing field coil and magnetic test coil group is installed in the cylindrical shell, inner support two ends and cylindrical shell two ends connect as one, and field coil and magnetic test coil are enclosed in the cylindrical shell together with inner support;
B forms the circulation duct of measured object by sensor outer housing inwall and cylindrical shell oscillator outer wall, and cylindrical shell and sensor outer housing are symmetrical structure.
2, vibration shell density sensor according to claim 1 is characterized in that: be fixed on the inner support (5) coil groups with servo between to be electrically connected be to utilize the cable of the circular seal pipe pass the inner support axle center to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114239A CN1037127C (en) | 1993-11-17 | 1993-11-17 | Vibration shell density sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114239A CN1037127C (en) | 1993-11-17 | 1993-11-17 | Vibration shell density sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1103164A CN1103164A (en) | 1995-05-31 |
| CN1037127C true CN1037127C (en) | 1998-01-21 |
Family
ID=4990424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93114239A Expired - Fee Related CN1037127C (en) | 1993-11-17 | 1993-11-17 | Vibration shell density sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037127C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408997C (en) * | 1998-07-15 | 2008-08-06 | 海德拉运动有限公司 | diagnostic sensor |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498282C (en) * | 2005-06-30 | 2009-06-10 | 昆明冶金研究院 | On-line electronic densimeter |
| CN104949897A (en) * | 2015-06-25 | 2015-09-30 | 青岛澳邦量器有限责任公司 | Handheld digital densimeter |
| CN106968709B (en) * | 2017-03-22 | 2019-12-13 | 太原理工大学 | A plugging monitoring device and monitoring method for a paste filling pipeline |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831433A (en) * | 1971-12-07 | 1974-08-27 | Merestechnikai Kozponti | Apparatus for measuring the density of a fluid by resonance |
| US4064739A (en) * | 1976-07-29 | 1977-12-27 | International Telephone And Telegraph Corporation | Densitometer |
| US4275585A (en) * | 1979-11-21 | 1981-06-30 | General Electric Company | Vibrator type densitometer |
| US4466272A (en) * | 1979-11-06 | 1984-08-21 | The Solartron Electronic Group Limited | Fluid density transducer |
| US4583393A (en) * | 1984-03-20 | 1986-04-22 | Ontario Research Foundation | Ultrasonic density meter with damping |
| US4655075A (en) * | 1984-09-26 | 1987-04-07 | University Of Delaware | Vibrating tube densimeter |
| EP0221467A1 (en) * | 1985-10-25 | 1987-05-13 | Fuji Electric Co., Ltd. | Vibrating type transducer |
| US4849988A (en) * | 1988-02-19 | 1989-07-18 | Texaco Inc. | Apparatus and method for measuring the quality of steam |
| WO1990012306A1 (en) * | 1989-03-30 | 1990-10-18 | Instrulab | Vibrating densimeter sensor |
-
1993
- 1993-11-17 CN CN93114239A patent/CN1037127C/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831433A (en) * | 1971-12-07 | 1974-08-27 | Merestechnikai Kozponti | Apparatus for measuring the density of a fluid by resonance |
| US4064739A (en) * | 1976-07-29 | 1977-12-27 | International Telephone And Telegraph Corporation | Densitometer |
| US4466272A (en) * | 1979-11-06 | 1984-08-21 | The Solartron Electronic Group Limited | Fluid density transducer |
| US4275585A (en) * | 1979-11-21 | 1981-06-30 | General Electric Company | Vibrator type densitometer |
| US4583393A (en) * | 1984-03-20 | 1986-04-22 | Ontario Research Foundation | Ultrasonic density meter with damping |
| US4655075A (en) * | 1984-09-26 | 1987-04-07 | University Of Delaware | Vibrating tube densimeter |
| EP0221467A1 (en) * | 1985-10-25 | 1987-05-13 | Fuji Electric Co., Ltd. | Vibrating type transducer |
| US4849988A (en) * | 1988-02-19 | 1989-07-18 | Texaco Inc. | Apparatus and method for measuring the quality of steam |
| WO1990012306A1 (en) * | 1989-03-30 | 1990-10-18 | Instrulab | Vibrating densimeter sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408997C (en) * | 1998-07-15 | 2008-08-06 | 海德拉运动有限公司 | diagnostic sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1103164A (en) | 1995-05-31 |
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