CN109556680A - A kind of level measuring method and system - Google Patents
A kind of level measuring method and system Download PDFInfo
- Publication number
- CN109556680A CN109556680A CN201910067100.9A CN201910067100A CN109556680A CN 109556680 A CN109556680 A CN 109556680A CN 201910067100 A CN201910067100 A CN 201910067100A CN 109556680 A CN109556680 A CN 109556680A
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- CN
- China
- Prior art keywords
- resonance
- resonance cylinder
- densitometer
- cylinder densitometer
- liquid level
- Prior art date
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Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
Abstract
A kind of level measuring method, comprising the following steps: 1) record resonance cylinder densitometer initial position and parameter；2) the mobile resonance cylinder densitometer carries out level gauging；3) position and the parameter of current resonance cylinder densitometer are recorded；4) the mobile resonance cylinder densimeter measurement liquid level variation.Of the invention also provides a kind of liquid level measuring system, and resonance cylinder densitometer accurately perceives the variation of liquid level position and liquid level, and structure is simpler, convenient, fast.
Description
Technical field
The present invention relates to measuring instrumentss technical fields, more particularly to a kind of level measuring method and system.
Background technique
In life and work, liquid level is a critically important operating condition, but liquid level is not often and intuitive or not square
Just it observes.By taking s.t.o (liquid) position of a 5000m3 as an example, need to know constantly oil level is how much, and be inconvenient to watch liquid level,
It needs to indicate trapped fuel amount in real time with liquid level sensor.The mode that conventional liquidometer experiences liquid level position has float buoyancy
Formula experiences liquid level according to the buoyancy size of float, mechanical floats that are this and dividing the servo-type and passive measurement that actively measure,
It is all the position that liquid is experienced according to the buoyancy of float.
Radar and ultrasonic wave are when reaching liquid level according to radar signal and ultrasonic wave, and liquid level reflects corresponding waveform, according to
Time difference measurements liquid level.
The measurement method of above-mentioned principle is influenced by fluid density, liquid property, environmental factor etc., and accuracy and sensitivity is not
It is high.
Said mechanism can only measure liquid level simultaneously, not be capable of measuring the density of liquid.
Summary of the invention
In order to solve the shortcomings of the prior art, the purpose of the present invention is to provide a kind of level measuring method and it is
System, can accurately perceive the variation of liquid level position and liquid level.
To achieve the above object, a kind of level measuring method provided by the invention, comprising the following steps:
1) resonance cylinder densitometer initial position and parameter are recorded；
2) the mobile resonance cylinder densitometer carries out level gauging；
3) position and the parameter of current resonance cylinder densitometer are recorded；
4) the mobile resonance cylinder densimeter measurement liquid level variation.
Further, the step 1) further comprises,
The resonance cylinder densitometer is moved to a certain position by lifting device, and by the position and resonance cylinder densitometer
Resonance frequency or density value are recorded as initial position and parameter.
Further, the step 2 further comprises,
The mobile resonance cylinder densitometer；
Observe the variation of resonance cylinder densitometer resonance frequency or density value；
When the resonance frequency or density value change, the current position of record resonance cylinder densitometer.
Further, the step 3) is to record resonance cylinder densitometer current position and resonance frequency or density
Value.
Further, the step 4) further comprises,
Observe the variation of resonance cylinder densitometer resonance frequency or density value；
When resonance cylinder densitometer resonance frequency or density value change, mobile resonance cylinder densitometer makes resonance frequency or density
Value is restored to original value；
Record the mobile distance of resonance cylinder densitometer.
To achieve the above object, the present invention also provides a kind of liquid level measuring system, including, container, resonance cylinder densitometer,
Lifting device, wherein
The resonance cylinder densitometer is located in the container, and is moved up and down in described by lifting device；
The lifting device drives the resonance cylinder densitometer to be moved, and carries out to the displacement of the resonance cylinder densitometer
Measurement.
Further, the lifting device is automatic or manual lifting device.
Further, the lifting device, including the displacement measurement list for measuring the resonance cylinder densitometer displacement
Member.
A kind of level measuring method of the invention, has the advantages that
1) it uses resonance cylinder densimeter measurement liquid level position and judges fluid change, increase resonance cylinder densitometer application range.
2) liquid level position and fluid change can accurately be perceived.
3) system structure is simple, it is easier to operate.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, and with it is of the invention
Embodiment together, is used to explain the present invention, and is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is a kind of level measuring method flow chart according to the present invention；
Fig. 2 is a kind of liquid level measuring system structural schematic diagram according to the present invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Fig. 1 is a kind of level measuring method flow chart according to the present invention, below with reference to Fig. 1, to liquid level of the invention
Measurement method is described in detail.
The present invention measures the position of liquid level and variation using resonance cylinder densitometer, its working principles are as follows:
The resonant body of resonance cylinder densitometer is a thin-walled tubbiness metallic object, which generates resonance, resonance frequency by driving
Rate is in air and the intracorporal variation of liquid is very big, when resonance cylinder densitometer drops on liquid level out of air, resonance frequency horse
On change, thus have found liquid level position, if the displacement of resonance cylinder densitometer can be accurately measured, from liquid level with
As soon as the densitometer of upper fixed point decline, the distance passed by from top to bottom have to the distance for touching transient liquid with liquid level
Certain corresponding relationship.
Firstly, recording resonance cylinder densitometer initial position and resonance frequency in step 101.
In this step, resonance cylinder densitometer is placed in container a certain position on liquid level as initial position, and remembered
Record the resonance frequency of the location information harmony vibration cylinder densitometer.
In step 102, the mobile resonance cylinder densitometer carries out liquid level gauging.
In the step, there is very big difference in air and in liquid according to the resonance frequency of resonance cylinder densitometer, when
Resonance frequency moment can change when resonance cylinder densitometer drops to liquid level position out of air, record the resonance cylinder at the moment
Liquid level position can be obtained in densitometer position and resonance frequency.
In step 103, it is original frequency that current resonance cylinder densitometer, which is arranged, to immerse the resonance frequency of position.In the step,
We set the position of resonance cylinder bottom end immersion liquid as a setting value, record the corresponding frequency of this setting value.
In step 104, when the original frequency changes, mobile meter resonance cylinder densitometer returns the original frequency.The step
In rapid, after the position of resonance cylinder densitometer is fixed, when frequency changes, illustrate that resonance cylinder densitometer is immersed in the intracorporal length of liquid
It changes, illustrates that liquid level is changed, move the position of resonance cylinder densitometer at this time, reach resonance frequency again
Original frequency.
In step 105, the resonance cylinder densitometer moving distance and current location, resonance cylinder densitometer moving distance are recorded
As liquid level changes distance, and resonance cylinder densitometer current location is the liquid level physical location.
It, can also since the resonance frequency of resonance cylinder densitometer and the density of the liquid have linear relationship in the present invention
Using using variable density, as measurement liquid level and the method for liquid level variation, step is surveyed with above-mentioned using resonance frequency variation
The method for measuring liquid level and liquid level variation is identical.
Fig. 2 is liquid level measuring system structural schematic diagram according to the present invention, as shown in Fig. 2, level gauging system of the invention
System, including, container, resonance cylinder densitometer, lifting device, wherein
Resonance cylinder densitometer is located in container, and is connected with lifting device；Lifting device band dynamic resonance cylinder densitometer is in container
In move up and down.
Lifting device further comprises displacement measurement unit, the distance moved up and down for measuring resonance cylinder densitometer.
Preferably, lifting device is apparatus for automatically lifting or manual hoisting device.
Perceive liquid level position and use resonance cylinder densitometer, record resonance cylinder air resonance frequency, when sensor is from upper
During moving down, when resonance frequency changes, to touch liquid level.Such as resonance tube length degree 30mm, air interior resonance frequency
2000Hz, the resonance frequency for being totally immersed into liquid is 4000Hz, then from 2000Hz, corresponding resonance tube length degree 30mm, 0.1mm
Corresponding resonance frequency variation is 6.6Hz, we set the position of resonance cylinder immersion liquid 10mm as a setting value, this sets
The corresponding frequency of definite value is that 2666Hz illustrates that resonance cylinder is immersed in the intracorporal length of liquid and becomes smaller, illustrate liquid when frequency becomes smaller
Liquid level decline, needs that density sensor is allowed to decline at this time, reaches the point that resonance frequency is 2666Hz again, resonance cylinder senses at this time
The position of device also just represents the physical location of liquid level.When resonance frequency becomes larger, illustrate the part that liquid rises, and resonance cylinder immerses
Increase, need to mention density sensor upwards, reaches the position that resonance frequency is 2666Hz.
Level measuring method of the invention, first record resonance cylinder densitometer initial position and parameter；Pass through lifting device
The mobile resonance cylinder densitometer carries out level gauging, the distance which can be passed by with precise measurement densitometer；Record
The position of current resonance cylinder densitometer and parameter；By the mobile resonance cylinder densitometer of lifting device, when resonance canister portion point into
When entering to liquid, resonance cylinder resonance frequency changes, and finds preset resonant frequency point (pre-set point resonance frequency
Rate can be set substantially from the air to resonance cylinder enter 1-5mm in liquid apart from when the resonance frequency that measures), the resonance
Frequency point can represent liquid level position, and when the distance change of liquid level submergence resonance cylinder, resonance frequency changes, and goes up and down at this time
The weight calculation of device band dynamic density newly rises or falls, until the resonant frequency point set originally, the distance of lifting device measurement at this time
There is relativity with the height of liquid.
Those of ordinary skill in the art will appreciate that: the foregoing is only a preferred embodiment of the present invention, and does not have to
In the limitation present invention, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art
For, still can to foregoing embodiments record technical solution modify, or to part of technical characteristic into
Row equivalent replacement.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of level measuring method, which comprises the following steps:
1) resonance cylinder densitometer initial position and parameter are recorded；
2) the mobile resonance cylinder densitometer carries out level gauging；
3) position and the parameter of current resonance cylinder densitometer are recorded；
4) the mobile resonance cylinder densimeter measurement liquid level variation.
2. the method according to claim 1, wherein the step 1) further comprises,
The resonance cylinder densitometer is moved to a certain position by lifting device, and by the position and resonance cylinder densitometer
Resonance frequency or density value are recorded as initial position and parameter.
3. the method according to claim 1, wherein the step 2 further comprises,
The mobile resonance cylinder densitometer；
Observe the variation of resonance cylinder densitometer resonance frequency or density value；
When the resonance frequency or density value change, the current position of record resonance cylinder densitometer.
4. the method according to claim 1, wherein the step 3), is that record resonance cylinder densitometer is current
Position and resonance frequency or density value.
5. the method according to claim 1, wherein the step 4) further comprises,
Observe the variation of resonance cylinder densitometer resonance frequency or density value；
When resonance cylinder densitometer resonance frequency or density value change, mobile resonance cylinder densitometer makes resonance frequency or density
Value is restored to original value；
Record the mobile distance of resonance cylinder densitometer.
6. a kind of liquid level measuring system, which is characterized in that including container, resonance cylinder densitometer, servo-type lifting device, wherein
The resonance cylinder densitometer is located in the container, and is moved up and down in described by lifting device；
The lifting device drives the resonance cylinder densitometer to be moved, and carries out to the displacement of the resonance cylinder densitometer
Measurement.
7. liquid level measuring system according to claim 6, which is characterized in that the lifting device is automatic or manual liter
Falling unit.
8. liquid level measuring system according to claim 6, which is characterized in that the lifting device, including for measuring institute
State the displacement measurement unit of resonance cylinder densitometer displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067100.9A CN109556680A (en) | 2019-01-24 | 2019-01-24 | A kind of level measuring method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910067100.9A CN109556680A (en) | 2019-01-24 | 2019-01-24 | A kind of level measuring method and system |
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| Publication Number | Publication Date |
|---|---|
| CN109556680A true CN109556680A (en) | 2019-04-02 |
Family
ID=65873403
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910067100.9A Pending CN109556680A (en) | 2019-01-24 | 2019-01-24 | A kind of level measuring method and system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87209380U (en) * | 1987-06-21 | 1988-06-15 | 吉林省计量测试技术研究所 | Optical fibre sensitive tank gauge |
| JPH07146168A (en) * | 1993-11-22 | 1995-06-06 | Suzuki Motor Corp | Ultrasonic liquid level measuring instrument |
| CN104677462A (en) * | 2015-02-10 | 2015-06-03 | 浙江沁园水处理科技有限公司 | Self-adapted non-immersion type liquid level detection device and detection method |
| KR101540974B1 (en) * | 2014-08-07 | 2015-08-03 | 한국원자력연구원 | Measurement Device and Measurement Method for Liquid Surface eight |
| CN107735653A (en) * | 2016-03-31 | 2018-02-23 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level sensor and detection method and Full-automatic picking sampling device |
| CN209247127U (en) * | 2019-01-24 | 2019-08-13 | 北京均友欣业科技有限公司 | A kind of liquid level measuring system |
-
2019
- 2019-01-24 CN CN201910067100.9A patent/CN109556680A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87209380U (en) * | 1987-06-21 | 1988-06-15 | 吉林省计量测试技术研究所 | Optical fibre sensitive tank gauge |
| JPH07146168A (en) * | 1993-11-22 | 1995-06-06 | Suzuki Motor Corp | Ultrasonic liquid level measuring instrument |
| KR101540974B1 (en) * | 2014-08-07 | 2015-08-03 | 한국원자력연구원 | Measurement Device and Measurement Method for Liquid Surface eight |
| CN104677462A (en) * | 2015-02-10 | 2015-06-03 | 浙江沁园水处理科技有限公司 | Self-adapted non-immersion type liquid level detection device and detection method |
| CN107735653A (en) * | 2016-03-31 | 2018-02-23 | 深圳迈瑞生物医疗电子股份有限公司 | Liquid level sensor and detection method and Full-automatic picking sampling device |
| CN209247127U (en) * | 2019-01-24 | 2019-08-13 | 北京均友欣业科技有限公司 | A kind of liquid level measuring system |
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