CN110209079A - Precise positioning density measuring equipment - Google Patents
Precise positioning density measuring equipment Download PDFInfo
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- CN110209079A CN110209079A CN201910432130.5A CN201910432130A CN110209079A CN 110209079 A CN110209079 A CN 110209079A CN 201910432130 A CN201910432130 A CN 201910432130A CN 110209079 A CN110209079 A CN 110209079A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25033—Pc structure of the system structure, control, syncronization, data, alarm, connect I-O line to interface
Abstract
This application discloses a kind of precise positioning density measuring equipments for wet tank, comprising: device noumenon is fixed with flat cable wheel and encoder wheel thereon；Flat cable, its pile warp flat cable wheel and encoder wheel, one end of flat cable is fixed in device noumenon, the other end is connected with float, float is hung in wet tank by flat cable, driving unit, for driving flat cable wheel to rotate, it drives flat cable to move up and down, and encoder wheel is driven to rotate；Wherein, density sensor, conductivity sensor are installed on float, wherein, encoder wheel is connected with encoder, for measuring the upright position of flat cable, wherein, precise positioning density measuring equipment further includes main control unit, for controlling driving unit work, and from the upright position data of encoder reception flat cable, the density and conductivity data of the substance in wet tank are received from density sensor, conductivity sensor.
Description
Technical field
The invention belongs to industrial automation metering field, it is related to the comprehensive metering more particularly to a kind of essence to wet tank
Certainly bit density measuring device.
Background technique
In the large-scale wet tank used in big tank liquid material storage industry, often there is density point in stored liquid
The phenomenon that uneven distributions such as layer, thermal stratification, and this lamination often with gone bad by tank body it is related, to whole tank measure
Bring very big interference.The case where if you need to understand the hair density stratification of storage pot liquid and thermal stratification, this is just needed to liquid difference
The parameters such as density, temperature, the viscosity of depth are acquired, thus according to the above-mentioned physical property of each depth collected
It reads and draws out clearly data profile (such as density profile), provide foundation for production and handling of goods and materials.
Currently, the artificial mode throwing ruler and measuring the liquid sampling of different depth is mostly used in industry, to draw out ratio
More careful density, temperature, viscosity profile, need largely to sample, and workload is huge, and the artificial height essence for throwing ruler sampling
Not enough, material is removed measurement to degree, since the parameters such as pressure and temp change rapidly, is difficult measurement accurately, actual measured results are past
Toward the real density distribution situation that can not react storage pot liquid.
There is an urgent need to a kind of dresses for capableing of the measurements such as precise positioning float height and real-time online progress density in the industry as a result,
It sets.
Summary of the invention
The purpose of the present invention is being directed to the defect of the above technology, a kind of precise positioning density measuring equipment, the device are provided
These parameters can be carried out with unified acquisition, calculated and teletransmission controls, and without taking out sample, float (pendant) is directly deeply
The parameters such as density, temperature, viscosity are measured in tank, to substantially reduce labor intensity of workers, and reactor tank that can be practical
The truth of interior storing is realized by precise positioning float depth to objects such as density, viscosity, temperature at different depth
Expect the measurement of parameter, float positioning accuracy is up to ± 1mm.
Apparatus of the present invention are mounted on the top of storage tank, go up and down float sensor using servo power mechanism, are mainly used for liquid
The comprehensive metering of body storage tank class warehousing system.This device had both been able to achieve to density, temperature, the viscosity at fluid to be measured different depth
Etc. material properties parameter measurement, also can realize calculating to material storage volume by liquid level, level measuring.Due to high-order liquid
Body storage pot liquid will appear density stratification phenomenon, so the density of different liquid level depths has very big difference, by accurate
It positions float position and realizes that this enables storage tank manager to be apparent from currently to the parameter of materials measurement at storage tank different depth
Whether the material of storage there is phenomena such as layering, Density Distribution situation, whether generate precipitating, is rotten, greatly facilitates material
Management.
According to an embodiment of the present application, a kind of precise positioning density measuring equipment for wet tank is provided, it is special
Sign is to include: device noumenon (1), is fixed with flat cable wheel (3) and encoder wheel (9) thereon；Flat cable (10), around
Through the flat cable wheel (3) and the encoder wheel (9), one end of the flat cable (10) is fixed on described device ontology
(1) on, the other end is connected with float (11), and the float (11) is hung in the wet tank by flat cable (10)；
Driving unit (4) drives the flat cable (10) to move up and down, and drive for driving the flat cable wheel (3) to rotate
Encoder wheel (9) rotation；Wherein, density sensor, conductivity sensor are installed on the float (11), wherein institute
It states encoder wheel (9) and is connected with encoder (8), for measuring the upright position of the flat cable (10), wherein is described accurate
Bit density measuring device further includes main control unit (5), is connected to the driving unit (4), the encoder (8), described
Density sensor, the conductivity sensor, wherein the main control unit (5) works for controlling the driving unit (4),
And the upright position data of the flat cable (10) are received from the encoder (8), from the density sensor, the conductance
Rate sensor receives the density and conductivity data of the substance in the wet tank.
Compared with prior art, the invention has the following advantages that
1, the real-time online measuring to parameter of materials such as the density, temperature, viscosity of the accurate depth of storage tank is realized, this is greatly
The comprehensive metering facilitated to flask volume and quality.
2, the method that density measure uses the direct density of immersion, the hybrid densimeter method of more current mainstream and is manually adopted
The measurement methods such as sample have very big precision and accuracy to be promoted, and also enhance the reliability of data, improve comprehensive metering precision.
3, using servo power mechanism, carrying density, temperature, viscosity, water level sensor transfers to tank inside simultaneously, directly
The physical parameters such as multimetering material density, temperature, viscosity are connect, density measurement accuracy is increased to by the 5 ‰ of mixing method before
0.2 ‰ even higher precision, are greatly improved total quality measuring accuracy, since whole process is driven by MCU master control system
Dynamic servo power chest automatic measurement, greatly reduces labor intensity, avoids the uncertainty and risk artificially sampled, also reduce
Business administration cost.
4, the automatic more height point material properties detections of big tank metering timing can monitor material whether have occurred precipitating, minute
The case where influences such as layer, rotten are produced and used or are sold.
Detailed description of the invention
Fig. 1 is the positive structure schematic according to the precise positioning density measuring equipment of the embodiment of the present invention；
Fig. 2 is the structure schematic diagram according to the precise positioning density measuring equipment of the embodiment of the present invention；
Fig. 3 is the functional block diagram according to the precise positioning density measuring equipment of the embodiment of the present invention；
Fig. 4 is the level gauging schematic illustration according to the precise positioning density measuring equipment of the embodiment of the present invention.
Appended drawing reference is as follows:
1-shell, 2-connecting terminal chambers, 3-flat cable wheels, 4-servo power mechanisms, 5-MCU master control systems,
6-tension detection mechanisms, 7-force-measuring wheels, 8-encoders, 9-encoder wheels, 10-flat cables, 11-floats, 12-floats
Protective device (side cage, bottom foot), 13-magnetosensitive approach switchs, 14-permanent magnets, 15-power modules, 16-Method for Installation
It is blue.
Specific embodiment
In the following, being described in further detail in conjunction with attached drawing to the implementation of technical solution.
It will be appreciated by those of skill in the art that although the following description is related to many of embodiment for the present invention
Technical detail, but be only for not meaning that any restrictions for illustrating the example of the principle of the present invention.The present invention can be applicable in
In the occasion being different from except technical detail exemplified below, without departing from the principle and spirit of the invention.
It, may be to can be in description in the present specification in addition, tedious in order to avoid being limited to the description of this specification
The portion of techniques details obtained in prior art data has carried out the processing such as omission, simplification, accommodation, this technology for this field
It will be understood by for personnel, and this will not influence the open adequacy of this specification.
The principle of the present invention is summarized first.
According to an embodiment of the invention, providing a kind of precise positioning density measuring equipment, it is mainly used for passing through servo control
It is for example close to measure storing physics matter parameter in wet tank that system processed and flat cable carry the float (pendant) equipped with sensor
Degree, viscosity, temperature and reserves parameter such as liquid level, water level etc..Its main feature is that can precisely launch float reaches specified altitude assignment position, it is fixed
Position precision reaches ± 1mm, needs multipoint positioning to measure the demand so that it is determined that Density Distribution situation mainly for density stratification storage tank.
Firstly, summarizing the working principle of the precise positioning density measuring equipment of embodiment according to the present invention.MCU master control system
System control servo power mechanism drives the rotation of flat cable wheel to run flat cable above and below, and passes through encoder accurate measurement
Flat cable length, float carrying density, temperature, viscosity, water level sensor are suspended on same with flat cable below flat cable
The upper and lower operation of step, and then realize to the density of tested material different height, viscosity, temperature, liquid level, the real-time measurement of water level.
Specifically, flat cable one ends wound is on flat cable wheel, with sensors such as density, viscosity, temperature, water levels
Float be connected to the other end of flat cable and hang below device, flat cable wheel is connected on servo power mechanism, MCU
Master control system controls servo power mechanism and drives flat cable wheel synchronous rotary, and then float is driven to run up and down, in flat electricity
It is provided with encoder wheel and force-measuring wheel between cable wheel and float, drives encoder wheel is synchronous to turn while flat cable is run up and down
Dynamic, the tension force effect generated on flat cable by float gravity is on force-measuring wheel, by the rotational pulse meter for recording encoder
The rotating cycle and angle of number calculation code device wheel, and then flat cable is accurately calculated by the perimeter of encoder wheel and is run up and down
Length, realize that precise positioning floats the real-time height of word by the decentralization length of flat cable, positioning accuracy is up to ± 1mm, flat
Steel tape and conducting wire built in flat cable, flat cable are both length-measuring appliance, and are float power supply and float and MCU master
The access of system communication is controlled, apparatus of the present invention have level gauging function.
It elaborates with reference to the accompanying drawing to the present invention.
Fig. 1 is the positive structure schematic according to the precise positioning density measuring equipment of the embodiment of the present invention；
Fig. 2 is the structure schematic diagram according to the precise positioning density measuring equipment of the embodiment of the present invention.
As illustrated in fig. 1 and 2, the precise positioning density measuring equipment of embodiment according to the present invention mainly includes shell 1, connects
Line terminals chamber 2, flat cable wheel 3, servo power mechanism 4, MCU master control system 5, tension detection mechanism 6, force-measuring wheel 7, encoder 8,
Encoder wheel 9, flat cable 10, float 11, float protective device 12 (side cage, bottom foot), magnetosensitive approach switch 13, permanent magnetism
Body 14, power module 15, mounting flange 16 etc..The present apparatus is mounted on tested material storage tank (fluid reservoir) top by mounting flange 16
Portion.
Wherein, it is furnished with density sensor, temperature sensor, viscosity sensor, water level sensor on float 11.
Float 11 is hung below device by flat cable 10, and float 11 is powered by flat cable 10, and with MCU master
Control system 5 communicates.Flat cable 10 is wrapped on flat cable wheel 3, and MCU master control system 5 is controlled flat by servo power mechanism 4
Flat cable wheel 3 is rotated forward, is inverted, to change winding circle number of the flat cable 10 on encoder wheel disc 9, and then changes flat electricity
The decentralization length of cable 10.Meanwhile flat cable 10 will drive the rotation of encoder wheel 9 in decentralization process, pass through the meter of encoder 8
Numerical value can determine the practical decentralization length of flat cable 10, and then adjustable float 11 is in arbitrary height, realize to quilt
Survey density, viscosity, temperature, liquid level, the real-time online automatic measurement of water level of substance different depth or different height.
Wherein, the calculation formula of the decentralization length of flat cable 10 is as follows:
Hn=(F2-F0)/(F1/L1)
Wherein, Hn is the physical length that flat cable 10 is transferred；F1 is the umber of pulse that one circle of the rotation of encoder wheel 9 generates；
L1 is the perimeter of encoder wheel 9；F2 is total accumulative real-time pulse number of encoder 8；F0 is when float 11 is in dead-center position
Encoder pulse number.
Wherein, package rubber, etching decorative pattern groove, setting salient point, cable are taken on encoder wheel 9 and flat cable 10
The non-skid features such as punching, preventing flat cable 10 from skidding in encoder wheel 9 influences positioning accuracy.
Wherein, also built-in steel tape while 10 inner conductors of flat cable, realizing flat cable is both for float
The electric installation of power supply and the length device of precise positioning float position and level gauging.
In addition, the present apparatus is additionally provided with the force checking device 6 of the tension for detecting flat cable 10, wherein flat electricity
10 pile warp force checking device 6 of cable, MCU master control system 5 monitor the reading of force checking device 6 in real time.In this way, working as force checking device 6
Reading exceed scheduled normal range (NR) when, MCU master control system 5 by servo power mechanism 4 control flat cable wheel 3 with corresponding
Direction rotates, and the pulling force that release flat cable 10 is born, can effectively avoid float 11 from being stuck in the process of running causes
Flat cable 10 occurred by 4 excessive tensile of servo power mechanism or the serious conditions broken.
The present apparatus is also provided with independent connecting terminal chamber 2, for external power supply introducing and communication interface, external interface energy
Realize the long-range control of the teletransmission and host computer of measurement data to apparatus of the present invention.
The mode of the running length of the accurate control flat cable 10 of explanation below.Band in about 10 operational process of flat cable
Dynamic encoder wheel 9 rotates synchronously, so that the actual motion length of flat cable 10 is recorded in a pulsed fashion by encoder 8
Come, this counted number of pulses is finally acquired by MCU master control system 5, is conversed according to the perimeter of step-by-step counting and encoder wheel disc 9 flat
The actual motion length of flat cable, so as to know the specific height and position of current float 11.
Fig. 4 is the level gauging schematic illustration according to the precise positioning density measuring equipment of the embodiment of the present invention.Ginseng
See Fig. 4, storage tank body outage Hn is counter to push away liquid level Н у by measuring, wherein calibrated altitude Hi and altitude datum Hb is through people
The fixed value that work measurement obtains, this two value are stored in the memory of the present apparatus.Then the present apparatus is passed through by measuring outage Hn
Following formula calculates liquid level Hy:
Н у=Н b+ Н i- Н n
MCU master control system 5 can obtain outage Hn by the practical decentralization length of measurement flat cable 10.Start to measure
When, MUC master control system 5 rotates flat cable wheel 3 by control power mechanism 4 and above mentions float 11, until being mounted on zero-bit position
The magnetosensitive approach switch 13 set is installed in the triggering of the permanent magnet 14 on flat cable 10, that is, thinks that float 11 reaches zero-bit position
It sets, the count value of encoder 8 is zero-bit count value at this time.
Next starting level gauging, the slow downlink of float 11, while the density sensor being mounted on float 11 is real-time
Density measure is carried out, until detecting that density mutates, illustrates to enter liquid, be obtained by repeatedly souning out Approach by inchmeal up and down
Exact filling level height and position, counting virtual value=current count value-zero-bit count value of encoder 8, virtual value process are changed at this time
It calculates and obtains 10 actual motion length Hn of flat cable.
The physical datas such as density, viscosity, temperature are passed by density, viscosity sensor and the temperature being mounted on float 11
What sensor directly measured, and concentrate and be sent to MCU master control system 5.
Illustrate the measuring principle of medium interface in storage tank below.In oil tank storage system, in fact it could happen that upper layer is under oil
The phenomenon that layer is water should measure oil, vapor interface height in this case, again measurement oil, water interface level, the present apparatus
Conductivity sensor can be embedded on float 11, the conductivity variations by measuring different medium perceive water level position, can be quasi-
Really measurement oil, vapor interface height and oil, water interface level.
Illustrate the effect and working method of tension detection mechanism 6 below.Since float 11 is needed in actual measurement by flat
Cable 10 is drawn to be run back and forth up and down, this process is possible to meet with obstruction, for example, by the foreign matter in storage tank block or with storage
Top tank structure is contacted and is unable to run；At this point, will lead to flat if servo power mechanism 4 still runs and stretch flat cable 10
Flat cable 10 is excessively stretched or even breaks；Flat cable 10 is once pulled off, and float 11 will fall off in storage tank, will be generated
Very serious consequence.It is excessively discharged alternatively, may also lead to flat cable 10, causes altitude information measuring error or flat
Flat cable 10 generates winding, will also result in plant failure.The occurrence of in order to avoid these, the present apparatus install the power inspection of belt wheel additional
Mechanism 6 is surveyed, flat cable 10 is directly partly wound on force-measuring wheel 7, is become by the tension of 7 real-time monitoring flat cable 10 of force-measuring wheel
Change, once discovery tension is abnormal, 5 hard stop servo power mechanism 4 of MCU master control system, and alarm and protection.
The structure brief introduction of MCU master control system.MCU master control system 5 is based on embedded type CPU control system, includes CPU, power supply
The composition such as module, clock module, memory module, communication interface module, real-time clock module.MCU master control system 5 is whole equipment
Core, be responsible for control servo power mechanism 4, acquire encoder 8 and tension detection mechanism 6 each sensing of data, COMPREHENSIVE CALCULATING
The measurement result of device and peripheral equipment communication etc..
Illustrate the realization of timing automatic measurement function below.The built-in real-time clock perpetual calendar of the present apparatus, can be through host computer
Software is configured starting time of measuring, this setting can be stored in the memory of oneself by present device, then
Off-line working start by set date measures.
Finally, it will be appreciated by those of skill in the art that various modifications can be made to the above embodiment of the present invention, become
Type and replacement, each fall within protection scope of the present invention as defined in the appended claims.
Claims (6)
1. a kind of precise positioning density measuring equipment for wet tank, characterized by comprising:
Device noumenon (1) is fixed with flat cable wheel (3) and encoder wheel (9) thereon；
Flat cable (10), flat cable wheel (3) and the encoder wheel (9) described in pile warp, the flat cable (10)
One end is fixed on described device ontology (1), and the other end is connected with float (11), and the float (11) passes through flat cable (10)
It hangs in the wet tank；
Driving unit (4) drives the flat cable (10) to move up and down for driving the flat cable wheel (3) to rotate, and
The encoder wheel (9) are driven to rotate；
Wherein, density sensor, conductivity sensor are installed on the float (11),
Wherein, the encoder wheel (9) is connected with encoder (8), for measuring the upright position of the flat cable (10),
Wherein, the precise positioning density measuring equipment further includes main control unit (5), is connected to the driving unit (4), institute
Encoder (8), the density sensor, the conductivity sensor are stated,
Wherein, the main control unit (5) works for controlling the driving unit (4), and from described in the encoder (8) reception
The upright position data of flat cable (10) receive the wet tank from the density sensor, the conductivity sensor
The density and conductivity data of interior substance.
2. precise positioning density measuring equipment according to claim 1, it is characterised in that further include being fixed on described device
Force-measuring wheel (7) and force checking device (6) on ontology (1), force-measuring wheel (7) described in the pile warp of the flat cable (10),
Wherein, the force-measuring wheel (7) is connected to the force checking device (6), for measuring the flat cable (10) receiving
Pulling force, and the pulling force data of measurement is transmitted to the main control unit (5), the main control unit (5) is drawn based on the received
Force data and control starting and stopping for the driving unit (4).
3. precise positioning density measuring equipment according to claim 1, which is characterized in that the main control unit (5) is used for
It controls the driving unit (4) and drives float (11) lifting, it is prominent when detecting that density occurs by the density sensor
When change, the current vertical position of the float (11), the liquid level as the wet tank are recorded.
4. precise positioning density measuring equipment according to claim 1, which is characterized in that the main control unit (5) is used for
It controls the driving unit (4) and drives the float (11) lifting, when detecting conductivity hair by the conductivity sensor
When raw mutation, the current vertical position of the float (11) is recorded, as the oil-water interfaces height in the wet tank.
5. precise positioning density measuring equipment according to claim 1, which is characterized in that the float (11) has protection
Shell is side inclosure, the setting of bottom stitch, for protecting the float (11), the density sensor and the conductance
Rate sensor is not impacted directly by external force.
6. precise positioning density measuring equipment according to claim 1, which is characterized in that determine the float (11) as follows
Upright position Hn:
Hn=(F2-F0)/(F1/L1)
Wherein, F1 is the umber of pulse that the encoder (8) are generated in one circle of the encoder wheel (9) rotation, and L1 is the volume
The perimeter of code device wheel (9), F2 are total accumulated pulse number of the encoder (8), and F0 is volume when float 11 is in initial position
Code device umber of pulse.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432130.5A CN110209079A (en) | 2019-05-23 | 2019-05-23 | Precise positioning density measuring equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432130.5A CN110209079A (en) | 2019-05-23 | 2019-05-23 | Precise positioning density measuring equipment |
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| CN110209079A true CN110209079A (en) | 2019-09-06 |
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| CN201910432130.5A Pending CN110209079A (en) | 2019-05-23 | 2019-05-23 | Precise positioning density measuring equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595575A (en) * | 2019-10-18 | 2019-12-20 | 北京均友欣业科技有限公司 | Automatic metering instrument for storage tank |
| CN116026421A (en) * | 2023-03-31 | 2023-04-28 | 日照检验认证有限公司 | Intelligent remote control liquid article liquid level temperature measuring and calculating device |
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| RU2188400C1 (en) * | 2001-10-17 | 2002-08-27 | Зао "Нтф Новинтех" | Device for measurement of level and density |
| CN1746631A (en) * | 2004-09-10 | 2006-03-15 | 高轶群 | On-line inspection system of oil-storage tank level and oil-products density |
| CN201672954U (en) * | 2010-04-26 | 2010-12-15 | 马鞍山市力翔机械自动化科技有限公司 | Electromechanical type high-precision liquid level measuring device |
| CN208206230U (en) * | 2018-06-20 | 2018-12-07 | 中国石油天然气股份有限公司重庆仓储分公司 | A kind of oil plant liquid level density measurement device |
| CN210323818U (en) * | 2019-05-23 | 2020-04-14 | 北京瑞赛长城航空测控技术有限公司 | Servo type on-line density and liquid level comprehensive automatic metering device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595575A (en) * | 2019-10-18 | 2019-12-20 | 北京均友欣业科技有限公司 | Automatic metering instrument for storage tank |
| CN116026421A (en) * | 2023-03-31 | 2023-04-28 | 日照检验认证有限公司 | Intelligent remote control liquid article liquid level temperature measuring and calculating device |
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