CN102564514A - Electronic fusion measurement liquid level transmitter and measurement method thereof - Google Patents
Electronic fusion measurement liquid level transmitter and measurement method thereof Download PDFInfo
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- CN102564514A CN102564514A CN201210030319XA CN201210030319A CN102564514A CN 102564514 A CN102564514 A CN 102564514A CN 201210030319X A CN201210030319X A CN 201210030319XA CN 201210030319 A CN201210030319 A CN 201210030319A CN 102564514 A CN102564514 A CN 102564514A
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Abstract
The invention relates to an electronic fusion measurement liquid level transmitter and a measurement method thereof, which belong to the technical field of liquid measurement equipment. The electronic fusion measurement liquid level transmitter comprises a liquid level measurement element, a temperature measurement element and a signal processor, wherein the liquid level measurement element and the temperature measurement element are respectively connected with the signal processor. The electronic fusion measurement liquid level transmitter and the measurement method thereof have the advantages that the problem of influences of reference point variation and temperature variation on accuracy of measurement results in liquid level measurement can be solved, efficient and accurate liquid level measurement is realized, and influences of variation of factors such as measurement media, other related environments and the like are avoided; and the electronic fusion measurement liquid level transmitter is simple and convenient in mounting, precise and stable in measurement, high in stability, long in service life, favorable for loss reduction and cost reduction, adaptable to liquid level measurement in various environments and suitable for popularization and application in engineering fields of tank group areas, gasoline stations, oil wharf refineries and the like.
Description
Technical field
The present invention relates to a kind of electronics and merge measuring liquid level transmitter and measuring method thereof, belong to the liquid measure equipment technical field.
Background technology
At present; Fields such as production and transport at a lot of liquid state products; Wherein, the liquid level change situation of liquid form product is for relevant production and manage extremely importantly in the reservoir vessel, and particularly the accuracy of Level Detection has material impact for the smooth implementation of the process system relevant with liquid.But, now widely used liquid level emasuring device often because of the variation of measuring object exists reference point zero correction inaccurate, thereby directly cause measuring result error big; And then influence the work of aspects such as associated production, transportation and management; In addition, environmental change also has very big influence, particularly temperature variation very obvious to the influence of level gauging to the measurement of liquid level; Therefore, need to be resolved hurrily that reference point in the level gauging changes and temperature variation to the problem that influences of measurement result accuracy.
In the prior art, patent of invention ZL 200410074336.9 discloses a kind of storage tank liquid level and oil density on-line detecting system, mainly by static pressure transducer P1, and static pressure transducer P2; Temperature sensor T, floating plate (or ball float), stay-supported displacement photoelectric encoder; Termination, switch board and computer system are formed, wherein; Keep certain distance between two static pressure transducer P1 that connect on the floating plate in oil tank, the P2, and certain depth under the liquid level that hangs down, also be connected with temperature sensor T on the floating plate; Floating plate is connected with backguy, and the information flow of electrical measurement is through termination, and switch board is to computer system.The liquid level in 0～50m scope can be accurately measured in this invention; Error is less than ± 1mm; The density value precision reaches 0.25 ‰, and the temperature monitoring trueness error is less than 0.5 ℃, but this invention is not taken all factors into consideration the influence of level gauging the variation and the temperature variation of reference point under the different situations; Simultaneously, the measurement range of liquid level is limited.
Summary of the invention
The objective of the invention is,, provide a kind of electronics to merge measuring liquid level transmitter and measuring method thereof, realize the efficiently and accurately measuring liquid level, do not receive the influence of factors vary such as measuring media and other relevant environment to the problem that prior art exists.
The technical scheme that the present invention deals with problems is: provide a kind of electronics to merge the measuring liquid level transmitter; Comprise level gauging element, temperature-measuring element, signal processor; Wherein, Said level gauging element is connected with said signal processor, and said temperature-measuring element is connected with said signal processor.
Further, said signal processor is positioned at the top of said level gauging element and temperature-measuring element, and said temperature-measuring element is positioned at the two ends of said level gauging element.
Further, said level gauging element is a plurality of, and said temperature-measuring element is a plurality of; Concrete quantity is according to the height setting of actual measurement liquid level, and in direct ratio with the height of measured liquid level, can prevent effectively that single element measuring-signal from departing from, and then guarantees the accuracy of measuring.
Further, be provided with temperature compensating element in the said signal processor, can eliminate the influence that temperature causes level gauging, guarantee the accuracy of level gauging.
Further, said temperature-measuring element comprises 18B20 type thermal module.
Further; Electronics of the present invention merges the measuring liquid level transmitter, also comprises well heater, and said well heater is connected with said signal processor; Before survey liquid reaches solidifying point, survey liquid is heated, to prevent influencing measurement because of liquid solidifies; Also comprise protective device, protection level gauging element and/or temperature-measuring element and/or signal processor prevent that it is influenced by external factor and causes measuring inaccurate.
The present invention also provides a kind of measuring method that said electronics merges the measuring liquid level transmitter of using, and comprises the steps:
(1) confirms reference point (zero point)
Measure the sedimentary height of wet tank inner bottom part,, set reference point locations, simultaneously, make being positioned on the same horizontal line with set null position bottom of level gauging element and temperature-measuring element the height measurements input signal processor;
(2) measure
Measure the temperature of a liquid and with the measured temperature input signal processor, through level gauging element measuring liquid level and with level gauging value input signal processor through temperature-measuring element;
(3) measured value signal output
Signal processor is handled received measured temperature and/or level gauging value, and for the single-measurement of liquid level or temperature, signal processor adopts 4～20mA current output signal and displays temperature measured value or level gauging value; For liquid level and temperature simultaneously measuring, signal processor adopts modbus RTU bus (RS485 communication signal) output signal and displays temperature measured value and level gauging value.
Further; Carry out level gauging through a plurality of level gauging elements in said rapid (2) and with level gauging value input signal processor, signal processor carries out association to the level gauging value that receives and judges that the back exports signal and show the level gauging value in the said step (3).
Further; Carry out temperature survey through a plurality of temperature-measuring elements in the said step (2) and with the measured temperature input signal processor, signal processor carries out association to the measured temperature that receives and judges that the back exports signal and displays temperature measured value in the said step (3).
Further, in the said step (3), said signal processor carries out exporting signal and showing the level gauging value after the temperature compensation to said level gauging value.
Said association is judged as a plurality of measured values is averaged processing.
Said temperature compensation is that said signal processor is proofreaied and correct liquid level according to the temperature of measuring in advance and the linear relationship of liquid level through temperature compensating element.
Compared with techniques is arranged, the invention has the beneficial effects as follows:
1, the invention solves in the level gauging that reference point changes and temperature variation to the problem that influences of measurement result accuracy, realized the efficiently and accurately measuring liquid level, and do not received the influence of factors vary such as measuring media and other relevant environment;
2, structural design of the present invention is novel, installs simple and conveniently, measures precise and stable; Good stability, long service life is beneficial to the minimizing loss; Reduce cost, adapt to the level gauging under the multiple environment, be suitable in the tank battery district, engineering field such as refuelling station, oil jetty refinery applies.
Description of drawings
Fig. 1 merges the functional block diagram of measuring liquid level transmitter for electronics of the present invention;
Fig. 2 merges the structural representation of measuring liquid level transmitter for electronics of the present invention;
Fig. 3 merges the top mounting structure synoptic diagram of measuring liquid level transmitter for electronics of the present invention;
Fig. 4 merges the sidepiece mounting structure synoptic diagram of measuring liquid level transmitter for electronics of the present invention.
Shown in the figure: 1-level gauging element, 2-temperature-measuring element, 3-signal processor, 4-storage tank.
Embodiment
As shown in Figure 1, electronics of the present invention merges the measuring liquid level transmitter, comprises level gauging element 1, temperature-measuring element 2, signal processor 3, and wherein, level gauging element 1 is connected with signal processor 3, and temperature-measuring element 2 is connected with signal processor 3; As shown in Figure 2, signal processor 3 is positioned at the top of level gauging element 1 and temperature-measuring element 2, and the quantity of temperature-measuring element 2 is 2, and the quantity of level gauging element is 1, and 2 temperature-measuring elements 2 are positioned at the two ends of level gauging element 1.
In the foregoing description, also comprise the protective device (not shown) of the well heater (not shown), protection level gauging element 1 and temperature-measuring element 2 and the signal processor 3 that are connected with signal processor 3; Be provided with the temperature compensating element (not shown) in the signal processor 3; Temperature-measuring element 2 comprises 18B20 type thermal module.
Like Fig. 3 and shown in Figure 4, fixed installation electronics of the present invention merges the measuring liquid level transmitter on storage tank 4, and the level gauging element internal is connected with storage tank 4.
When using electronics of the present invention and merging the measuring liquid level transmitter and measure, comprise the steps:
(1) confirms reference point (zero point)
Measure the sedimentary height of storage tank 4 inner bottom parts,, set reference point locations, simultaneously, make being positioned on the same horizontal line with the reference point locations that sets bottom of level gauging element 1 and temperature-measuring element 2 height measurements input signal processor 3; For example: a jar bed mud sand bed height is 0.2 meter, and setting 0.2 meter is zero point for reference point, the part that influences measuring accuracy is removed in advance, thus the accuracy that assurance is measured; Structurally, for mounting means as shown in Figure 3, with actual measurement equipment to be higher than 0.2 meter, storage tank 4 bottoms as zero point; For mounting means as shown in Figure 4: with the actual measurement device bottom than low 0.2 meter of liquid level zero point.
(2) measure
Through fluid temperatures in 2 temperature-measuring elements, the 2 measurement storage tank 4 and with measured temperature input signal processor 3, through level gauging element 1 measuring liquid level and with level gauging value input signal processor 3;
(3) measured value signal output
Signal processor carries out exporting signal and displays temperature measured value and/or level gauging value after association is judged to received measured temperature and/or level gauging value; For the single-measurement of liquid level or temperature, signal processor adopts 4～20mA current output signal and displays temperature measured value or level gauging value; For liquid level and temperature simultaneously measuring, signal processor adopts modbus RTU bus (RS485 communication signal) output signal and displays temperature measured value and level gauging value.
Wherein, 3 pairs of said level gauging values of signal processor carry out exporting signal and showing the level gauging value after the temperature compensation through said temperature compensating element.
The invention is not restricted to above-mentioned embodiment, those skilled in the art made to any conspicuous improvement of above-mentioned embodiment or change, can not exceed the protection domain of design of the present invention and accompanying claims.
Claims (9)
1. an electronics merges the measuring liquid level transmitter; It is characterized in that: comprise level gauging element, temperature-measuring element, signal processor; Wherein, said level gauging element is connected with said signal processor, and said temperature-measuring element is connected with said signal processor.
2. electronics according to claim 1 merges the measuring liquid level transmitter, and it is characterized in that: said signal processor is positioned at the top of said level gauging element and temperature-measuring element, and said temperature-measuring element is positioned at the two ends of said level gauging element.
3. electronics according to claim 1 merges the measuring liquid level transmitter, and it is characterized in that: said level gauging element is a plurality of, and said temperature-measuring element is a plurality of.
4. electronics according to claim 1 merges the measuring liquid level transmitter, it is characterized in that: be provided with temperature compensating element in the said signal processor.
5. electronics according to claim 1 merges the measuring liquid level transmitter, and it is characterized in that: also comprise well heater, said well heater is connected with said signal processor.
6. an application rights requires 1 described electronics to merge the measuring method of measuring liquid level transmitter, it is characterized in that, comprises the steps:
(1) confirms reference point
Measure the sedimentary height of wet tank inner bottom part,, set reference point locations, simultaneously, make being positioned on the same horizontal line with set reference point locations bottom of level gauging element and temperature-measuring element the height measurements input signal processor;
(2) measure
Measure the temperature of a liquid and with the measured temperature input signal processor, through level gauging element measuring liquid level and with level gauging value input signal processor through temperature-measuring element;
(3) measured value signal output
Signal processor is handled received measured temperature and/or level gauging value, and for the single-measurement of liquid level or temperature, signal processor adopts 4～20mA current output signal and shows measured value; For liquid level and temperature simultaneously measuring, signal processor adopts modbus RTU bus-out signal and shows measured value.
7. electronics according to claim 6 merges the measuring liquid level transmitter; It is characterized in that: carry out level gauging through a plurality of level gauging elements in the said step (2) and with level gauging value input signal processor, signal processor carries out association to the level gauging value that receives and judges that the back exports signal and show the level gauging value in the said step (3).
8. electronics according to claim 6 merges the measuring liquid level transmitter; It is characterized in that: carry out temperature survey through a plurality of temperature-measuring elements in the said step (2) and with the measured temperature input signal processor, signal processor carries out association to the measured temperature that receives and judges that the back exports signal and displays temperature measured value in the said step (3).
9. merge the measuring liquid level transmitter according to claim 6 or 7 described electronics, it is characterized in that: in the said step (3), said signal processor carries out exporting signal and showing the level gauging value after the temperature compensation to said level gauging value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030319XA CN102564514A (en) | 2012-02-10 | 2012-02-10 | Electronic fusion measurement liquid level transmitter and measurement method thereof |
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| CN201210030319XA CN102564514A (en) | 2012-02-10 | 2012-02-10 | Electronic fusion measurement liquid level transmitter and measurement method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706069A (en) * | 2015-11-18 | 2017-05-24 | 浙江大学自贡创新中心 | Ammonia mother liquid barrel liquid level measuring system |
| TWI791274B (en) * | 2020-09-16 | 2023-02-01 | 巫協森 | Method and system for automatic correction of liquid level, capacity and concentration of online measuring solution |
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| CN1122001A (en) * | 1994-08-30 | 1996-05-08 | 中国科学院上海硅酸盐研究所 | System for accurate measurement of oil storage capacity for large oil tank and use thereof |
| CN2876725Y (en) * | 2006-03-29 | 2007-03-07 | 宝山钢铁股份有限公司 | Level testing system for liquid container of sapce division apparatus |
| CN201488834U (en) * | 2008-11-25 | 2010-05-26 | 海尔集团公司 | Liquid level and liquid temperature measuring device |
| CN201707102U (en) * | 2010-01-15 | 2011-01-12 | 宋玉兴 | Novel liquid level sensor |
| CN202453019U (en) * | 2012-02-10 | 2012-09-26 | 北京中油联自动化技术开发有限公司 | Electronic fusion measurement liquid level transmitter |
-
2012
- 2012-02-10 CN CN201210030319XA patent/CN102564514A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122001A (en) * | 1994-08-30 | 1996-05-08 | 中国科学院上海硅酸盐研究所 | System for accurate measurement of oil storage capacity for large oil tank and use thereof |
| CN2876725Y (en) * | 2006-03-29 | 2007-03-07 | 宝山钢铁股份有限公司 | Level testing system for liquid container of sapce division apparatus |
| CN201488834U (en) * | 2008-11-25 | 2010-05-26 | 海尔集团公司 | Liquid level and liquid temperature measuring device |
| CN201707102U (en) * | 2010-01-15 | 2011-01-12 | 宋玉兴 | Novel liquid level sensor |
| CN202453019U (en) * | 2012-02-10 | 2012-09-26 | 北京中油联自动化技术开发有限公司 | Electronic fusion measurement liquid level transmitter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706069A (en) * | 2015-11-18 | 2017-05-24 | 浙江大学自贡创新中心 | Ammonia mother liquid barrel liquid level measuring system |
| TWI791274B (en) * | 2020-09-16 | 2023-02-01 | 巫協森 | Method and system for automatic correction of liquid level, capacity and concentration of online measuring solution |
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Application publication date: 20120711 |