CN1731154A - Underwater real-time optical dissolved oxygen measuring device - Google Patents
Underwater real-time optical dissolved oxygen measuring device Download PDFInfo
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- CN1731154A CN1731154A CN 200510044440 CN200510044440A CN1731154A CN 1731154 A CN1731154 A CN 1731154A CN 200510044440 CN200510044440 CN 200510044440 CN 200510044440 A CN200510044440 A CN 200510044440A CN 1731154 A CN1731154 A CN 1731154A
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- dissolved oxygen
- measuring device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
- G01N21/8507—Probe photometers, i.e. with optical measuring part dipped into fluid sample
Abstract
A kind of underwater real-time optical dissolved oxygen measuring device, the fluorescence excitation system that comprises light source in the sealed enclosure, the fluorescence receiving system that contains photodetector, optical filter, lens combination, circuit board and the fluorescence measuring device that contains programme controlled single-chip microcomputer formation, and dissolved oxygen sensor and PC, it is characterized in that it also comprises a temperature sensor, and dissolved oxygen sensor is the sensor of dissolved oxygen sensing under water that two excitation sources are arranged.Characteristics such as the present invention is rational in infrastructure, volume is little, in light weight, easy to operate, sensitivity and degree of accuracy height, wide dynamic range, anti-electromagnetic interference (EMI) are strong, anti-vibration and impact.Original Fiber Optic Oxygen measurement mechanism during in-site measurement, need personnel to operate at any time, and the present invention does not need personnel's execute-in-place can finish the surveying work of overall process at sea, and therefore, it can apply to measure under the high sea severe sea condition condition.
Description
Technical field
The present invention relates to a kind of underwater real-time optical dissolved oxygen measuring device that is used for marine eco-environment water body, aquaculture, water quality and the monitoring of other polluted-water dissolved oxygen DOs.
Background technology
Along with the development of industrial and agricultural production, various industrial waste waters, sanitary sewage, the excessive chemical fertilizer of using, agricultural chemicals etc. become the focus that people are concerned about to pollution aggravation, the especially water pollution of environment.Come importantly more as the mensuration status of the indication standard-dissolved oxygen DO of water quality, particularly the on-site rapid measurement of water body dissolved oxygen DO is even more important.The national standard method of measuring the water body dissolved oxygen DO at present is the winkler iodimetric titration, and this method not only exists to be needed to consume a large amount of samples, and length consuming time, can not on-the-spot monitoring in real time.Another kind of can the on-the-spot electrode type sensor that detects dissolved oxygen concentration, all be based on the lambda sensor of electrode type as colourimetry, primary and secondary wavelength optical spectroscopy, voltammetry, zirconium chloride trace oxygen analyzer and anionic polystyrene exchange membrane electrochemistry oxygen sensor etc.But, limited measuring speed because marking current is slow from producing the process that arrives balance; And the ventilated membrane of electrode is aging easily, and it need rely on the redox reaction of electrode itself to measure the concentration of oxygen, need to consume the oxygen of sample in the mensuration process, thus its measuring accuracy and response time all be subjected to coefficient of diffusion serious constraint, be the major defect of these class methods.
The Fiber Optic Oxygen measurement mechanism based on palycyclic aromatic fluorescent quenching technology and optical fiber technology of Chu Xianing in recent years, be to be made the oxygen sensing film by the fluorescent reagent of oxygen molecule quencher and be coupled in optical fiber end with what produce, adopting light emitting diode is the fluorescence excitation light source, combine with the photodiode detection system, obtained can be used for the on-the-spot Fiber Optic Oxygen measurement mechanism that detects dissolved oxygen DO in the water body.But this device needs with expensive silica fibre Shu Jinhang light transmission, when measuring at the scene again, and its device various (have controller waterborne with underwater sensor and be connected above water and the optical transmission cable of numerous length of underwater portion and cable).And need personnel to operate when measuring, can not round-the-clock, the round-the-clock monitoring, be not suitable for that the ocean is measured than deep layer and severe sea condition (high sea) environment in work.Therefore it uses the restriction that is subjected to a certain degree widely.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of full-automatic self-tolerant underwater real-time optical dissolved oxygen measuring device that does not need underwater cable and optical cable to make transport vehicle is provided.
The present invention is the improvement to existing optical fiber dissolved oxygen measurement mechanism, mainly be the underwater cable or the expensive quartzy optical cable of the numerous length in the alternative existing Fiber Optic Oxygen measurement mechanism of fluorescence receiving optics with two exciting lights of low-angle and back, and be adapted to venetian blind type light trapping light shield and the underwater sealing circular shell measured than deep layer and severe sea condition marine environment, collect the control cabinet waterborne, transmission cable of existing Fiber Optic Oxygen measurement mechanism and under water dissolved oxygen sensing whole corresponding functions of popping one's head in the present invention.
Technical conceive of the present invention is the perpendicular type optical lens system that the fluorescence excitation light path of routine is become " right-angled intersection " with receiving light path, being specifically designed as low-angle α is 8 °～12 ° two exciting lights and back to the fluorescence receiving optics, with reduced volume, weight reduction, improved excitating light strength again, thereby improved detection sensitivity, expanded the measurement dynamic range.Simultaneously under water again because adopt full-automatic self-tolerant, quartzy optical cable or cable that the single-chip microcomputer that contains program need not the costliness of numerous length, realize promptly that under water the dissolved oxygen sensing off line of popping one's head in works alone; In addition, in this device, also be provided with a temperature sensor that carries out temperature compensation, make its measuring accuracy, improved measuring accuracy not because of temperature drift changes.
The present invention includes probe of dissolved oxygen sensing under water (being called for short probe) that can off line (PC) works alone and the PC two large divisions that can be attached thereto the data processing demonstration that connects, form as Fig. 1 connection layout 2.The present invention includes specifically light source in the seal casinghousing in interior fluorescence excitation system, contain the fluorescence receiving system of photodetector, optical filter, lens combination, the modulation magnification circuit plate, electric battery, detector circuit plate, with contain the fluorescence measurement electricity system that programme controlled single-chip microcomputer constitutes, and contain the oxygen sensing film sheet at the interior dissolved oxygen sensor and the PC of data processing, it is characterized in that it comprises that also is fixed on a Connection Block top temperature sensor, and dissolved oxygen sensor is that one of two excitation sources dissolved oxygen sensing sensing is under water arranged
Therefore, the present invention has single plainly-packed, the characteristics such as volume is little, in light weight, portable, easy to operate, sensitivity and degree of accuracy height, wide dynamic range, anti-electromagnetic interference (EMI) are strong, anti-vibration and impact of structure, and can round-the-clock, all weather operations under than deep layer and severe sea condition environment, traditional dissolved oxygen sensing instrument and Fiber Optic Oxygen measurement mechanism are played expansion and raising effect.Under many situations, can finish them and be difficult to finish, even impossible mission.Become possibility because volume is little, in light weight, make it be integrated into many marine eco-environments detection system with other marine monitoring instruments again, to enlarge its measurement and range of application.The present invention also have manufacture simple, cheap advantage.
Description of drawings
Further specify the present invention below in conjunction with drawings and Examples.
Fig. 1 dissolved oxygen sensing under water of the present invention sonde configuration synoptic diagram.
Fig. 2 hand-held single-chip microcomputer of the present invention and the synoptic diagram that is connected with Fig. 1.
The STRUCTURE DECOMPOSITION synoptic diagram of Fig. 3 lambda sensor of the present invention.
Fig. 4 venetian blind type light trapping of the present invention decomposition texture synoptic diagram.
Fig. 5 the oxygen sensing film sheet of the present invention and sealed window glass sheet glued construction synoptic diagram.
Wherein: 1, light source; 2, glass sheet; 3, the oxygen sensing film sheet; 4, lens combination; 5, optical filter; 6, photodetector; 7, magnification circuit plate; 8, electric battery; 9, water-stop communication interface; 10, hang handle; 11, counterweight hanging ring; 12, detector circuit plate; 13, single-chip microcomputer; 14, temperature sensor; 15, cavity is surveyed in shading; 16, delustring cavity; 17, display screen; 18 buttons 19, communication interface; 20, communication cable; 21, Connection Block; 22, long bolt; 23, sun-shading cap; 24, pad post; 25, fluorescence measurement optical devices; 26, light trapping; 27, protective sleeve; The 28PC machine; 29, dissolved oxygen sensor;
Embodiment
As Fig. 1, Fig. 2, the present invention includes in the seal casinghousing light source 1 in interior fluorescence excitation system, contain photodetector 6, optical filter 5, the fluorescence receiving system of lens combination 4, modulation magnification circuit plate 7, electric battery 8, detector circuit plate 12, with the fluorescence measurement electricity system that contains programme controlled single-chip microcomputer 13 formations, and contain the dissolved oxygen sensor 29 of the oxygen sensing film sheet 3 and the PC 28 of data processing, it is characterized in that it comprises that also is fixed on Connection Block 21 top temperature sensors 14, and dissolved oxygen sensor 29 is that one of two excitation sources dissolved oxygen sensing sensor is under water arranged.
As Fig. 1, Fig. 3, Fig. 4, above-mentioned dissolved oxygen sensor 29 comprises the fluorescence excitation system, fluorescence receiving system and logical light window watertight glass sheet 2, and the tight the oxygen sensing film sheet of pasting thereon 3 are installed a light trapping 26 on the Connection Block 21 of housing bottom.This light trapping 26 can by Connection Block 21 and following with pad post 24 separately, cavity 15 is surveyed in the shading that long bolt 22 fixing a plurality of sun-shading caps 23 conspire to create, and is the column cavity of a similar Light-Proof Louver pattern.Promptly pass hole on pad post 24 and the sun-shading cap 23 at interval, be fixed tightly in the screw below the Connection Block 21 with three long bolts 22.Further contemplate the extinction effect of in-site measurement under water, above-mentioned dissolved oxygen sensor 29, also can a conical delustring cavity 16 of double-deck tack be installed again in the lower end that the chamber of cavity 15 is surveyed in the column shading, the wall body of this double-deck tack circular cone cavity and diapire some apertures that interlaced are to guarantee water body in time exchange and extinction effect better.
Above-mentioned light source 1 is two blue light-emitting diodes, and the centre wavelength of light source 1 is the single wavelength light source of 460nm, and model is XH-383BC-02, therefore saves existing light source 1 lens before and the optical system of optical filter composition.
As Fig. 3, the axis of above-mentioned light source 1 is that 8 °～12 ° low-angles are fixed on the detector circuit plate 12 for becoming α with the normal of wiring board 10.From the global design of instrument, the pitch angle is excessive, certainly will need to increase the radial dimension of instrument, is unfavorable for miniaturization; The pitch angle is too small, causes the reflection ray of 460nm emission light on the window mirror to enter in the lens barrel of fluorescence receiver lens group 4 easily, forms noise (though stopping of optical filter arranged, also will avoid); The model of photodetector 6 is OPT-301, and this photodetector 6 is vertically mounted on the detector circuit plate 12.Temperature sensor 14 is a thermistor, and model is SJMFE-395-103F.
The present invention constitutes the fluorescence excitation system by two excitation sources 1; By receiver lens group 4, optical filter 5, detector 6 constitutes the fluorescence receiving system; By the oxygen sensing film sheet 3, logical light glass sheet constitutes and is detected the logical light seal glass window that water body contacts, two excitation sources 1 of fluorescence excitation system are fixed on the detector circuit plate 12 of housing end of probe with 8 °～12 ° low-angle, promptly the excitation source 1 by two LED blue light-emitting diodes is radiated on the oxygen sensing film sheet 3 of the contact tested water body that is glued at seal glass sheet 2 lower ends, and the fluorescence signal that the increase with dissolved oxygen DO in the water body that excites the oxygen sensing film sheet 3 to be produced weakens, the photodetector 6 that then is vertically mounted on the integrated photodiode on the detector circuit plate 12 detects.And the fluorescence receiving system is fixed on the detector circuit plate 12 along the housing central axis, and the programmed control single-chip microcomputer 13 of modulation of source and signal Synchronization demodulation magnification circuit plate 7 and signal acquisition process, and connect direct current 12V electric battery 8, constitute power supply supply under water and automatic control system.Above-mentioned photodetector 6 models are OPT-301.Be provided with water-stop communication interface 9 again on the top of probe, this water-stop communication interface 9 is that PC 28 carries out the input of underwater operation program before it is thrown in, and after recovery with the measurement data playback process.This hand-held single-chip microcomputer is connected with the probe of dissolved oxygen sensing under water, and the water quality that can be used for the shallow water territory of aquaculture is made the transient measurement of dissolved oxygen DO and water temperature, and above-mentioned PC 28 can substitute with the hand-held single-chip microcomputer at this moment, and promptly above-mentioned PC 28 is hand-held single-chip microcomputers.，
Three long bolts 22 of this light trapping 26 are fastened on the Connection Block 21 on the fluorescence measurement optical devices 25.
As Fig. 1, throw in for in-site measurement and to hang conveniently, also install additional and hang handle 10 and install a counterweight suspension ring annulus 11 in the bottom centre of the terminal delustring cavity 16 of probe on the top of probe, as Fig. 3, used to hang mass.
The oxygen sensing film sheet 3 and window glass sheet 2 back glued together being integral as Fig. 5 with gummed protective sleeve 27 envelopes.
When the present invention carries out on-the-spot water area survey, only need are opened the gland bonnet of the water-stop communication interface 9 on top, incoming communication cable 20 is communicated with PC 28, according to in-site measurement demand input operation program, remove communication cable 20, tighten up the gland bonnet on the water-stop communication interface 9 then, it is rendered to decide water layer, can carry out surveying work on request.Measurement finishes, automatically outage shutdown, after the recovery again with PC 28 UNICOMs, playback measurement data data is carried out Measurement and Data Processing and is got final product.
When aquaculture water quality scene is detected in real time, utilize the hand-held single-chip microcomputer as Fig. 2, it is useful on and shows dissolved oxygen DO and water temperature display screen 17, button 18, communication interface 19 can carry out the real-time detection in scene as long as is connected with water-stop communication interface 9 by the long communication cable 20 of a radical rice.
In addition, existing Fiber Optic Oxygen measurement mechanism during in-site measurement, needs personnel to operate at sea at any time, the present invention does not then need personnel's execute-in-place, and can finish the surveying work of overall process, therefore, it can apply to measure under the high sea severe sea condition condition, reaches in the past can not finishing of task.
Claims (9)
1, underwater real-time optical dissolved oxygen measuring device, the fluorescence excitation system that comprises light source in the seal casinghousing (1), contain photodetector (6), optical filter (5), the fluorescence receiving system of lens combination (4), modulation magnification circuit plate (7), electric battery (8), detector circuit plate (12), with the fluorescence measurement electricity system that contains programme controlled single-chip microcomputer (13) formation, and contain the dissolved oxygen sensor (29) of the oxygen sensing film sheet (3) and the PC (28) of data processing, it is characterized in that it comprises that also is fixed on Connection Block (a 21) top temperature sensor (14), and dissolved oxygen sensor (29) is that one of two excitation sources (1) dissolved oxygen sensing sensor is under water arranged.
2, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned dissolved oxygen sensor (29) is the fluorescence excitation system that includes two excitation sources (1) and become two exciting lights formations of 8 °-12 ° of low-angles.
3, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned fluorescence measuring device (a 25) bottom installation light trapping (26).
4, underwater real-time optical dissolved oxygen measuring device as claimed in claim 3, it is characterized in that described light trapping (26) be by below the Connection Block (21) with pad post (24) a plurality of sun-shading caps (23) separately, conspire to create shading detection cavity (15) and delustring cavity (16) is fixed on the Connection Block (21) with long bolt (22).
5, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned PC (28) is a single-chip microcomputer.
6, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned photodetector (6) is for being vertically mounted on the integrated photodiode on the detector circuit plate (12).
7, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned the oxygen sensing film sheet (3) and sealed window glass sheet (2) back glued together being integral with gummed protective sleeve (27) envelope.
8, underwater real-time optical dissolved oxygen measuring device as claimed in claim 4 is characterized in that the bottom centre of above-mentioned delustring cavity (16) installs a counterweight suspension ring annulus (11).
9, underwater real-time optical dissolved oxygen measuring device as claimed in claim 1 is characterized in that above-mentioned light source (1) is two blue light-emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510044440 CN1731154B (en) | 2005-08-17 | 2005-08-17 | Underwater real-time optical dissolved oxygen measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510044440 CN1731154B (en) | 2005-08-17 | 2005-08-17 | Underwater real-time optical dissolved oxygen measuring device |
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| CN1731154A true CN1731154A (en) | 2006-02-08 |
| CN1731154B CN1731154B (en) | 2010-10-06 |
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| CN 200510044440 Expired - Fee Related CN1731154B (en) | 2005-08-17 | 2005-08-17 | Underwater real-time optical dissolved oxygen measuring device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135637B (en) * | 2007-09-29 | 2010-08-04 | 中国科学院上海光学精密机械研究所 | Optical fiber dissolved oxygen sensing head and preparing method thereof |
| CN101980311A (en) * | 2010-08-27 | 2011-02-23 | 国家海洋局第二海洋研究所 | Method for giving alarm to low oxygen phenomenon of inshore ocean by monitoring buoys |
| CN102253024A (en) * | 2011-06-08 | 2011-11-23 | 中国农业大学 | Optical dissolved oxygen sensor |
| CN102305731A (en) * | 2011-05-19 | 2012-01-04 | 浙江大学 | Sealing sampler provided with dissolved oxygen probe |
| CN102445417A (en) * | 2011-11-11 | 2012-05-09 | 东南大学 | Integrated dissolved oxygen analyzer and method |
| CN102854174A (en) * | 2011-07-25 | 2013-01-02 | 中国科学院烟台海岸带研究所 | Fluorescent dissolved oxygen online measure device, and dissolved oxygen detection method using it |
| CN103364375A (en) * | 2012-03-28 | 2013-10-23 | 哈希公司 | Adjustment of measurement system components |
| CN103868904A (en) * | 2014-04-09 | 2014-06-18 | 西南石油大学 | Double-optical-fiber oxygen sensor |
| CN104865231A (en) * | 2015-05-25 | 2015-08-26 | 南京信息工程大学 | Multichannel optical dissolved oxygen measurement device and measurement method |
| CN104990904A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | Optical dissolved oxygen detector |
| CN105136766A (en) * | 2015-10-16 | 2015-12-09 | 山东省科学院海洋仪器仪表研究所 | Dissolved oxygen measuring method based on fluorescence quenching principle and application |
| CN106226280A (en) * | 2016-08-25 | 2016-12-14 | 江苏美淼环保科技有限公司 | In a kind of water, oil on-line monitoring is popped one's head in and uses online oil monitoring device in the water of this probe |
| CN111537487A (en) * | 2020-05-25 | 2020-08-14 | 清华大学 | Temperature compensation method and device of optical oxygen sensor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2749389B1 (en) * | 1996-06-03 | 1998-08-07 | Arnatronic Plus | BIOLOGICAL SENSOR AND WATER QUALITY MONITORING METHOD |
| CN2505842Y (en) * | 2000-08-11 | 2002-08-14 | 中国蓝星化学清洗总公司 | Water quality on line detecting device |
| CN2502264Y (en) * | 2001-10-12 | 2002-07-24 | 国家海洋局第一海洋研究所 | Fibre-optical probe for underwater real-time optical detection |
| GB0311049D0 (en) * | 2003-05-14 | 2003-06-18 | Univ Robert Gordon | Apparatus and method |
| CN2816801Y (en) * | 2005-08-17 | 2006-09-13 | 国家海洋局第一海洋研究所 | Underwater dissolved oxygen measuring sensor |
-
2005
- 2005-08-17 CN CN 200510044440 patent/CN1731154B/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135637B (en) * | 2007-09-29 | 2010-08-04 | 中国科学院上海光学精密机械研究所 | Optical fiber dissolved oxygen sensing head and preparing method thereof |
| CN101980311A (en) * | 2010-08-27 | 2011-02-23 | 国家海洋局第二海洋研究所 | Method for giving alarm to low oxygen phenomenon of inshore ocean by monitoring buoys |
| CN101980311B (en) * | 2010-08-27 | 2012-07-25 | 国家海洋局第二海洋研究所 | Method for giving alarm to low oxygen phenomenon of inshore ocean by monitoring buoys |
| CN102305731A (en) * | 2011-05-19 | 2012-01-04 | 浙江大学 | Sealing sampler provided with dissolved oxygen probe |
| CN102305731B (en) * | 2011-05-19 | 2013-04-24 | 浙江大学 | Sealing sampler provided with dissolved oxygen probe |
| CN102253024B (en) * | 2011-06-08 | 2013-03-20 | 中国农业大学 | Optical dissolved oxygen sensor |
| CN102253024A (en) * | 2011-06-08 | 2011-11-23 | 中国农业大学 | Optical dissolved oxygen sensor |
| CN102854174A (en) * | 2011-07-25 | 2013-01-02 | 中国科学院烟台海岸带研究所 | Fluorescent dissolved oxygen online measure device, and dissolved oxygen detection method using it |
| CN102854174B (en) * | 2011-07-25 | 2015-05-13 | 中国科学院烟台海岸带研究所 | Fluorescent dissolved oxygen online measure device, and dissolved oxygen detection method using it |
| CN102445417A (en) * | 2011-11-11 | 2012-05-09 | 东南大学 | Integrated dissolved oxygen analyzer and method |
| CN102445417B (en) * | 2011-11-11 | 2014-08-06 | 东南大学 | Integrated dissolved oxygen analyzer and method |
| CN103364375B (en) * | 2012-03-28 | 2017-10-17 | 哈希公司 | The adjustment of measuring system component |
| CN103364375A (en) * | 2012-03-28 | 2013-10-23 | 哈希公司 | Adjustment of measurement system components |
| CN103868904A (en) * | 2014-04-09 | 2014-06-18 | 西南石油大学 | Double-optical-fiber oxygen sensor |
| CN104865231B (en) * | 2015-05-25 | 2017-07-28 | 南京信息工程大学 | A kind of Multi-channel optical dissolved oxygen sensing method |
| CN104865231A (en) * | 2015-05-25 | 2015-08-26 | 南京信息工程大学 | Multichannel optical dissolved oxygen measurement device and measurement method |
| CN104990904A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | Optical dissolved oxygen detector |
| CN105136766A (en) * | 2015-10-16 | 2015-12-09 | 山东省科学院海洋仪器仪表研究所 | Dissolved oxygen measuring method based on fluorescence quenching principle and application |
| CN106226280A (en) * | 2016-08-25 | 2016-12-14 | 江苏美淼环保科技有限公司 | In a kind of water, oil on-line monitoring is popped one's head in and uses online oil monitoring device in the water of this probe |
| CN111537487A (en) * | 2020-05-25 | 2020-08-14 | 清华大学 | Temperature compensation method and device of optical oxygen sensor |
| CN111537487B (en) * | 2020-05-25 | 2021-04-02 | 清华大学 | Temperature compensation method and device of optical oxygen sensor |
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