CN101008581A - Laser measurement liquid level meter - Google Patents
Laser measurement liquid level meter Download PDFInfo
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- CN101008581A CN101008581A CN 200610041748 CN200610041748A CN101008581A CN 101008581 A CN101008581 A CN 101008581A CN 200610041748 CN200610041748 CN 200610041748 CN 200610041748 A CN200610041748 A CN 200610041748A CN 101008581 A CN101008581 A CN 101008581A
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Abstract
This invention relates to liquid level automatic display device, which comprises laser process module fixed on hard right circle tube shell top end and floater moving up and down rail along tube wall under liquid float. This invention uses laser beam to trace liquid surface float label and standard vertical distance to get accurate liquid level data.
Description
Technical field
The invention belongs to the liquid level autoamtic display device, is a kind of photoelectric liquid-levle automatic display unit of large range high precision, is used in the liquid level of fixing or relatively-stationary place observation range 0.01-500 rice, and its precision can reach more than 1 millimeter.
Background technology
At present, the height of department such as oil, chemical industry measuring liquid level or the used measurement mechanism of capacity has: direct-reading liquid level instrument, floating type liquid level instrument, capacitance object position instrument, sound wave type material level gauge, nuclear radiation formula liquid level instrument and photoelectric liquid-levle instrument etc.Photoelectric liquid-levle instrument, known have two kinds of forms: a kind of is the YW-B type optical-fiber liquid level gauge of Harbin Institute of Technology's development, and its adopts floating plate, steel wire, weight, angle sheave, rope opinion, magnetic coupling, optical fiber, optical code disk, opto-electronic conversion etc.; Another kind is a UPG-II type optical-fiber liquid level gauge, and it is made up of buoy, pulley blocks, sign indicating number band balance weight, photodetector etc.From the composition of two kinds of liquid level instrument as can be seen, their physical construction is many, and it certainly will cause bigger system's cumulative errors as can be known according to the error analysis theory.
Department such as electric power, water conservancy to adopt original manual detection or utilizes float-type liquid level instrument.Float-type liquid level instrument majority all is to utilize the motion of the rectilinear motion of float lifting with liquid surface lifting through transferring elements such as wire rope, steel sign indicating number band, angle sheaves, at an end connection count device of rotating shaft, is used for field measurement.The other end connects electric signal original paper (as optical code disk, brush dish), through being converted to demonstration or detecting at a distance.Because machining precision, instrument that the structure more complicated of this quasi-instrument, its measuring accuracy are limited by instrument itself installation accuracy and system friction etc. at the scene.Therefore their common drawback is: complex structure; The processing request height; Installation requires high; Easy care not; Range is little, the measuring error of measuring accuracy is ± 5 millimeters.Having grown precision service time also will reduce.As Chinese patent (CN89204414) photo-electric pulley coding liquid level instrument.With the steel sign indicating number with on method be the Gray code government establishments law.Take the photograph the infrared electric eye optical system of phase device, and lens hood and anti-interference plate are housed, the measuring error of measuring accuracy is narrowed down to ± 2 millimeters for forming by lenslet.But the installation of its total system requires high; The defective of easy care is not clearly yet.
Summary of the invention
Task of the present invention provide a kind of take up room little, the precision height, cost is low, convenient for installation and maintenance, explosion proof and corrosion protection, the automatic liquid level observation device that antijamming capability is strong.This device need not can directly show level value through the correction of water-mass density and atmospheric pressure.And can when liquid flow, show accurate level readings.Especially provide accurate level readings for embankment and the high petrochemical industry unit of fire-protection rating at awful weather.
Task of the present invention is finished as follows; Utilize the buoyancy aid sign of Laser Tracking liquid level and the vertical range of index plane, from accurate demonstration level value.That the present invention has is simple in structure, accurately and reliably, easy to use, explosion proof and corrosion protection, advantage such as antijamming capability is strong, installation and maintenance are easy.
For achieving the above object, the present invention adopts following structure:
The present invention is mainly by the laser treatment module (10) that is installed on the shell top, and the guide rail (3) that float (5) can be attached in the effect lower edge of liquid buoyancy on hard straight tube (2) inwall moves up and down.
Above-mentioned shell is the straight pipe of hard (2), and inwall is with two or three or many guide rails (3).
Above-mentioned laser treatment module (10) can be formed also and can be made up of strong luminotron and the receiving tube of the little luminous penetration power of power consumption by the LASER Discharge Tube (9) and the receiving tube (8) of low-power consumption.
Above-mentioned guide rail (3) is quick shaped form and installs on round tube inner wall.
Above-mentioned guide rail (3) is linearly installed along inside pipe wall.
The opposite direction of the quick curve in wall upper edge of above-mentioned pipe (2) has a plurality of delivery holes (7).
It is the spill refractive body (6) of minute surface that one lightweight surfaces is arranged on the above-mentioned float (5).
Two groups and the corresponding guide wheel of guide rail (3) (4), the center line of mounted guide wheel and the central lines of guide rail are arranged on the above-mentioned float (5).
The length of above-mentioned pipe (2) is during greater than certain value, and a pipe can be made up of the multistage pipe, at seam crossing special-purpose back-off and jig is arranged.
The end that hollow out is arranged of above-mentioned pipe (2).
The explanation of accompanying drawing drawing
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the installation site synoptic diagram of guide rail and guide wheel (4).
Fig. 3 is the structural representation of above-mentioned float (5), guide wheel (4) and spill refractive body (6).
Fig. 4 is the structural representation of base (1).
Fig. 5 is that the Laser emission on the laser treatment module (10) receives and the transmission course synoptic diagram.
The described liquid level instrument of Fig. 6 installation form does not have the liquid level observation place of container.
The installation form of the described liquid level instrument of Fig. 7 main body (13) is used for the liquid level observation place in the container.
Embodiment
With reference to Fig. 1, the present invention mainly is made up of shell (2), float (5), spill refractive body (6), guide rail (3), laser treatment module (10), display (11) etc.Shell of the present invention (2) is a hard pipe always, and inwall is with two or three or many guide rails (3).Guide rail (3) is quick shaped form and installs on round tube inner wall.As rifling, suitable helix.(or along tube wall also linearly install can, comparatively fast locate to install better at flow rate of liquid with quick shaped form.) as shown in Figure 2 three guide rails on the crosscut circle of pipe, be evenly distributed.(central point of per two guide rails and the angle in the center of circle are 120 degree.) three guide rails are three quick shaped forms that are parallel to each other and install on round tube inner wall.
Opposite direction at the quick curve in pipe wall upper edge has a plurality of delivery holes (7).Circular hole (7) as shown in Figure 1, its effect are to raise fast and the flow velocity of liquid when very fast when liquid level, and float (5) can raise reposefully synchronously, and reduces the friction force of guide wheel (4) and track (3) in the motion that float raises.
The length of pipe (2) is during greater than certain value, and a pipe can be made up of the multistage pipe.For the convenience of producing and transporting pipe can be divided into 2-5 rice the section, to the scene prescinding as required or spreading.In the process that connects, to note 2 points.One, the quick shaped form that is on round tube inner wall of guide rail (3) must be alignd, and guarantees the quick curve smoothness that guide rail (3) is on round tube inner wall.Two, pipe must linearly have special-purpose back-off and jig at seam crossing, guarantees installation quality.
Two groups and the corresponding guide wheel of guide rail (3) (4), the center line of mounted guide wheel and the central lines of guide rail are arranged on the float (5) in accompanying drawing 2, the accompanying drawing 3.Mounted guide wheel and guide rail be concavo-convex to interlock and suitable gap is arranged.When making guide rail give, and will drop to small with the friction force of guide wheel with the certain support of float.
The bottom of cylinder shown in the accompanying drawing 4 (2) is a round-meshed end.Its effect is to prevent that under the extremely low situation of liquid level float from damaging.
It is the spill refractive body (6) of minute surface that one lightweight surfaces is arranged on the float in the accompanying drawing 5 (5).Its A point that a branch of illumination that the laser generator (9) on the laser treatment module (10) penetrates can be mapped on the spill refractive body (6) is refracted to optical receiver (8) again through being refracted to the B point.The shell of float fixedly is equipped with two groups of guide wheels (4), when liquid level change, float (5) is subjected to the restriction of guide wheel (4) and guide rail (3) upper and lower unsteady, because of float (5) in that to be equilibrated at liquid level under gravity, the buoyancy function (slightly gapped between the surface of contact of guide wheel (4) and track (3), do not contact under the normal condition, if slightly contact during float (5) skew, the friction force of its generation is also very small); So in several milliseconds time period inner laser processing modules (10) and the distance between the spill refractive body (6) is certain value L1.The poor q of liquid level position L and L1 is a constant with respect to a kind of liquid of a relative position accurately, and q is relevant with the position of density of liquid, reference planes, the quality of float (5), the shape of spill refractive body (6) curved surface etc.; (influence of the quality of density of liquid and float (5) can measure constant a when construction; The position of reference planes also can measure constant b when construction; The shape of spill refractive body (6) curved surface is determined constant c when spill refractive body (6) is produced with laser treatment module (10).L1-c＝L2；q＝a+b)
The A point that the beam of laser that optical generator (9) on the accompanying drawing 5 laser treatment modules (10) penetrates shines on the spill refractive body (6) is refracted to optical receiver (8) again through being refracted to the B point.In a branch of light time that optical generator (9) penetrates, laser treatment module (10) T1 writing time is as optical receiver (8) laser treatment module (10) T2 writing time when receiving light.T2-T1＝T。(n is 300,000 kilometers per seconds of the standard light velocity to accurate liquid level position L=L2/2-q=T*n/2-q.) laser generator (9) adopts the laser generator of low-power consumption or adopt the strong luminotron of the little luminous penetration power of power consumption all can.As adopt the strong luminotron of the little luminous penetration power of power consumption so laser pickoff (8) also to make corresponding change.
The signal data that laser treatment module (10) is gathered shows the liquid level position by display (11) after computing is provided with the condition processing of module by setting.Also this liquid level signal can be transferred to other remote distance other display device in addition.Also can go up the installing presetting apparatus, set upper and lower limit liquid level warning point arbitrarily, when liquid level arrives the upper limit or lower position, send alerting signal, and can be used as the action of control signal source triggering liquid level control executing mechanism at display (11).
During enforcement such as the installation form of accompanying drawing 7 described liquid level instrument main bodys (13) be used for liquid level observation place in the container.Liquid level observation place at no container then should be according to the installation form of accompanying drawing 6 described liquid level instrument main bodys (12).Promptly the top that directly described liquid level instrument main body vertically is installed on container gets final product.
Claims (10)
1, a kind of instrument of automatic observation liquid level.Main by the laser treatment module (10) that is installed on the shell top, the guide rail (3) that float (5) can be attached in the effect lower edge of liquid buoyancy on hard straight tube (2) inwall moves up and down.
2, above-mentioned shell is the straight pipe of hard (2), and inwall is with two or three or many guide rails (3).
3, above-mentioned laser treatment module (10) can be formed also and can be made up of strong luminotron and the receiving tube of the little luminous penetration power of power consumption by the LASER Discharge Tube (9) and the receiving tube (8) of low-power consumption.
4, above-mentioned guide rail (3) is quick shaped form installation on round tube inner wall.
5, above-mentioned guide rail (3) is linearly installed along inside pipe wall.
6, the opposite direction of the quick curve in wall upper edge of above-mentioned pipe (2) has a plurality of delivery holes (7).
7, a lightweight surfaces being arranged on the above-mentioned float (5) is the spill refractive body (6) of minute surface.
8, two groups and the corresponding guide wheel of guide rail (3) (4), the center line of mounted guide wheel and the central lines of guide rail are arranged on the above-mentioned float (5).
When 9, the length of above-mentioned pipe (2) was greater than certain value, a pipe can be made up of the multistage pipe, at seam crossing special-purpose back-off and jig was arranged.
10, the end that hollow out is arranged (1) of above-mentioned pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610041748 CN101008581A (en) | 2006-01-27 | 2006-01-27 | Laser measurement liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610041748 CN101008581A (en) | 2006-01-27 | 2006-01-27 | Laser measurement liquid level meter |
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| Publication Number | Publication Date |
|---|---|
| CN101008581A true CN101008581A (en) | 2007-08-01 |
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| CN 200610041748 Pending CN101008581A (en) | 2006-01-27 | 2006-01-27 | Laser measurement liquid level meter |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900590A (en) * | 2010-06-29 | 2010-12-01 | 中国兵器装备集团摩托车检测技术研究所 | Volumetric rack electronic injection fuel consumption instrument |
| CN102323003A (en) * | 2011-10-14 | 2012-01-18 | 大连海洋大学 | High-accuracy automatic liquid pressure gauge |
| CN102538909A (en) * | 2012-02-13 | 2012-07-04 | 武汉理工大学 | Optical fiber liquid level measuring device |
| CN101285380B (en) * | 2008-05-27 | 2012-12-19 | 张炳爱 | Measuring method for water level of drilled shaft |
| CN103234603A (en) * | 2013-03-25 | 2013-08-07 | 上海市计量测试技术研究院 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
| WO2014023061A1 (en) * | 2012-08-07 | 2014-02-13 | 付建国 | Laser automatic tide gauge |
| CN106197613A (en) * | 2016-08-18 | 2016-12-07 | 四川泛华航空仪表电器有限公司 | Aircraft optical fiber fuel level sensor |
| CN107677305A (en) * | 2016-08-02 | 2018-02-09 | 何守印 | The online real-time network monitor of Urban Storm Flood |
| CN107747992A (en) * | 2017-09-27 | 2018-03-02 | 中国舰船研究设计中心 | A kind of radar wave guide for level gauging |
| CN109288530A (en) * | 2018-09-04 | 2019-02-01 | 曹君利 | A kind of wireless urine volume monitor and its system |
| CN110095166A (en) * | 2018-01-29 | 2019-08-06 | 杰克缝纫机股份有限公司 | A kind of sewing machine oil amount detecting device and monitoring system |
| CN111623852A (en) * | 2020-04-24 | 2020-09-04 | 北京航天控制仪器研究所 | Device and method for measuring liquid oxygen level of rocket fuel by laser ranging |
-
2006
- 2006-01-27 CN CN 200610041748 patent/CN101008581A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285380B (en) * | 2008-05-27 | 2012-12-19 | 张炳爱 | Measuring method for water level of drilled shaft |
| CN101900590A (en) * | 2010-06-29 | 2010-12-01 | 中国兵器装备集团摩托车检测技术研究所 | Volumetric rack electronic injection fuel consumption instrument |
| CN102323003A (en) * | 2011-10-14 | 2012-01-18 | 大连海洋大学 | High-accuracy automatic liquid pressure gauge |
| CN102538909A (en) * | 2012-02-13 | 2012-07-04 | 武汉理工大学 | Optical fiber liquid level measuring device |
| WO2014023061A1 (en) * | 2012-08-07 | 2014-02-13 | 付建国 | Laser automatic tide gauge |
| CN103234603B (en) * | 2013-03-25 | 2015-07-22 | 上海市计量测试技术研究院 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
| CN103234603A (en) * | 2013-03-25 | 2013-08-07 | 上海市计量测试技术研究院 | Floater mechanism and measurement method used for measuring liquid level of liquid pressure meter |
| CN107677305A (en) * | 2016-08-02 | 2018-02-09 | 何守印 | The online real-time network monitor of Urban Storm Flood |
| CN106197613A (en) * | 2016-08-18 | 2016-12-07 | 四川泛华航空仪表电器有限公司 | Aircraft optical fiber fuel level sensor |
| CN107747992A (en) * | 2017-09-27 | 2018-03-02 | 中国舰船研究设计中心 | A kind of radar wave guide for level gauging |
| CN110095166A (en) * | 2018-01-29 | 2019-08-06 | 杰克缝纫机股份有限公司 | A kind of sewing machine oil amount detecting device and monitoring system |
| CN109288530A (en) * | 2018-09-04 | 2019-02-01 | 曹君利 | A kind of wireless urine volume monitor and its system |
| CN109288530B (en) * | 2018-09-04 | 2021-06-25 | 曹君利 | Wireless urine volume monitor and system thereof |
| CN111623852A (en) * | 2020-04-24 | 2020-09-04 | 北京航天控制仪器研究所 | Device and method for measuring liquid oxygen level of rocket fuel by laser ranging |
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