CN203011836U - Dissolved oxygen concentration detecting device - Google Patents
Dissolved oxygen concentration detecting device Download PDFInfo
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- CN203011836U CN203011836U CN 201220727094 CN201220727094U CN203011836U CN 203011836 U CN203011836 U CN 203011836U CN 201220727094 CN201220727094 CN 201220727094 CN 201220727094 U CN201220727094 U CN 201220727094U CN 203011836 U CN203011836 U CN 203011836U
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- oxygen concentration
- dissolved oxygen
- detection probe
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Abstract
The utility model provides a dissolved oxygen concentration detecting device which comprises a detection probe (1), a data transmission line (2) and a data acquirer (3), wherein the detection probe (1) comprises an output end and a detection end which is opposite to the output end; the output end is connected with the acquiring end of the data acquirer (3) through the data transmission line (2); the detection probe (1) is used for converting the dissolved oxygen concentration information of a liquid into a standard current signal; and the data acquirer (3) is used for converting the standard current signal output from the detection probe (1) into a dissolved oxygen concentration signal and used for displaying the dissolved oxygen concentration signal. The dissolved oxygen concentration detecting device provided by the utility model can be carried over and used for detecting the dissolved oxygen concentration at any place at any time, and quality inspection personnel and aquaculture personnel can master the current water dissolved oxygen concentration information in time, so that the device is applicable to environmental measurement and multi-point rapid detection in the aquaculture field.
Description
Technical field
The utility model relates to the water quality detection field, is specifically related to a kind of device that detects dissolved oxygen concentration.
Background technology
The monitoring of dissolved oxygen concentration is an important goal of water quality detection field and aquaculture field, at present the detection of dissolved oxygen concentration mainly is based on electrochemical method, generate by the dissolved oxygen DO in water and the electrode reaction in sensor and detect electric current, therefore testing process is slow, accuracy of detection is low, and the drift of this kind sensor zero point is more serious, just needs at set intervals again to demarcate, and wastes time and energy.
for the more serious electrochemical sensor of picking rate hysteresis, can not realize measuring in real time fast, generally be mounted on acquisition station, being fixed on certain position measures for a long time, user in use inspection and maintenance is inconvenient, changing probe also is not easy, need in addition to export at set intervals the data in acquisition station in computer, in computer to data analysis, this method can only be seen the data before other day or a few week, situation of change to current oxygen in water concentration can not in time be grasped, for aquaculture, can not grasp in real time current dissolved oxygen concentration situation and just might cause heavy economic losses because of the anoxic mass mortality for fishes and shrimps.
The utility model content
The technical matters that (one) will solve
The purpose of this utility model is to provide a kind of can be carried, with walking with the dissolved oxygen concentration pick-up unit of surveying, in prior art, the dissolved oxygen concentration pick-up unit is arranged on to overcome maintenance, maintenance and the inconvenient shortcoming of replacing probe of bringing on acquisition station.
(2) technical scheme
In order to solve the problems of the technologies described above, the utility model provides a kind of dissolved oxygen concentration pick-up unit, and this device comprises detection probe, data line and data acquisition unit;
Described detection probe comprises output terminal and the test side relative with output terminal, and its output terminal is connected by data line with the collection terminal of data acquisition unit;
Described detection probe is used for the dissolved oxygen concentration information of liquid is converted into standard current signal;
Described data acquisition unit is used for the standard current signal of detection probe output is converted into the dissolved oxygen concentration signal, and shows.
Further, the output terminal of described detection probe and data line removably connect; Collection terminal and the data line of described data acquisition unit removably connect.
Wherein, described detection probe comprises the sensitive fluorescent membrane that is fixed near its test side, signal condition transmitting module, the light path conditioning unit that is fixed on close its output terminal;
Described light path conditioning unit comprises and being fixed on the signal condition transmitting module with to the light source of sensitive fluorescent membrane emission blue light be fixed on the signal condition transmitting module to receive the fluorescent probe of the red fluorescence that is inspired by sensitive fluorescent membrane under blue light illumination.
Further, described light path conditioning unit also comprises the light source optical filter that is fixed on described light source and the fluorescent optical filter that is fixed on fluorescent probe.
Further, described detection probe also comprises the digital temperature sensor that is fixed on described sensitive fluorescent membrane.
Wherein, be provided with digital processing chip in described signal condition transmitting module, for the treatment of the output signal of fluorescent probe and the data of collection digital temperature sensor.
Wherein, the material of described sensitive fluorescent membrane adopts the complex compound based on transition metal.
Further, described fluorescent probe adopts PIN photodiode.
Further, described data line adopts three core copper wire cables with screen layer.
Wherein, described data acquisition unit comprises single-chip microcomputer and the data acquisition module that is connected with described single-chip microcomputer respectively, data recording memory module, data communication module, data disaply moudle, button service module and energy supply control module.
(3) beneficial effect
the dissolved oxygen concentration pick-up unit that the utility model provides, solved conventional low based on the precision of electrochemical dissolution lambda sensor, speed is slow, the problems such as short and zero point drift of life-span is serious, the handhold portable formula of data acquisition unit design has simultaneously overcome fixed acquisition station maintenance, safeguard and change the probe inconvenience, data are checked untimely shortcoming, realized that the dissolved oxygen concentration pick-up unit can be carried and to dissolved oxygen concentration with walking with survey, facilitate water quality detection personnel and aquaculture personnel can in time understand current water quality dissolved oxygen concentration information, be applicable to the multiple spot fast detecting of environment measurement and aquaculture field, data acquisition unit is connected by data line with detection probe, can dismantle rapidly and change.
Description of drawings
Fig. 1 is the schematic diagram of the dissolved oxygen concentration pick-up unit that provides of the utility model.
Fig. 2 is the inner structure of detection probe in dissolved oxygen concentration pick-up unit shown in Figure 1.
Fig. 3 is the internal module functional diagram of data acquisition unit in dissolved oxygen concentration pick-up unit shown in Figure 1.
In figure, 1: detection probe; 2: data line: 3: data acquisition unit; 4: sensitive fluorescent membrane; 5: the light source optical filter; 6: fluorescent optical filter; 7: light source; 8: fluorescent probe; 9: digital temperature sensor; 10: the signal condition transmitting module.
Embodiment
The embodiment of the dissolved oxygen concentration pick-up unit that the utility model is provided below in conjunction with accompanying drawing is described in further detail.These embodiments only are used for explanation the utility model, and are not limitation of the utility model.
As shown in Figure 1, the dissolved oxygen concentration pick-up unit that provides of the utility model comprises detection probe 1, data line 2 and data acquisition unit 3; Described detection probe 1 is connected by data line 2 with data acquisition unit 3.
Described detection probe 1 is based on the principle of fluorescent quenching.Principle of fluorescent quenching is that the fluorescent material molecule is subject to can inspiring red fluorescence after the blue light illumination of certain wavelength, and the existence of quencher can affect the carrying out of this process, oxygen is a kind of common quencher, fluorescence is obeyed the Stern-Volmer equation by the degree of cancellation and oxygen concentration, as shown in Equation 1:
F
0/F=1+K
sv[Q] (1)
In formula: F
0Fluorescence intensity for oxygen-free water;
F is the fluorescence intensity of water sample to be detected;
K
svBe Stern-Volmer equation constant;
[Q] is that quencher namely dissolves oxygen concentration.
Can find out, fluorescence is by the degree F of cancellation
0[Q] is linear for the concentration of/F and quencher, therefore dissolved oxygen concentration can according in sample solution after the dissolved oxygen DO cancellation remaining fluorescence intensity measure, fluorescence intensity is more weak, cancellation degree is just larger, the expression dissolved oxygen concentration is higher, represents that on the contrary dissolved oxygen concentration is lower.
Described detection probe 1 is used for the dissolved oxygen concentration information of liquid is converted into standard current signal.Described data acquisition unit 3 adopts the hand-held design, and it comprises a rectangular-shaped shell, grips to facilitate the testing staff; Described shell is provided with LCD screen and a plurality of button; Described data acquisition unit 3 is used for the standard current signal of detection probe 1 output is converted into the dissolved oxygen concentration signal, and is presented on LCD screen.The three core copper wire cables that described data line 2 adopts with screen layer, its length can be regulated.
Described detection probe 1 comprises output terminal and the test side relative with output terminal, and its output terminal and data line 2 removably connect; Collection terminal and the data line of described data acquisition unit 3 removably connect; In the present embodiment, the output terminal of described detection probe 1 adopts the waterproof aviation plug to be connected with data line 2; The collection terminal of described data acquisition unit 3 also adopts the waterproof aviation plug to be connected with data line 2, can facilitate like this dismounting and the replacing of described each parts of dissolved oxygen concentration pick-up unit.
As shown in Figure 2, described detection probe 1 comprises and is fixed near sensitive fluorescent membrane 4, the light path conditioning unit of its test side and is fixed on signal condition transmitting module 10 near its output terminal.The material of described sensitive fluorescent membrane 4 adopts the complex compound based on transition metal, adopts in the present embodiment the high-molecular complex of platinum as the material of sensitive fluorescent membrane 4.4 pairs of blue lights of described sensitive fluorescent membrane have very high susceptibility and fluorescence excitation efficient, are the red fluorescence that can inspire 650nm under the blue light illumination of 470nm at wavelength.
Described light path conditioning unit comprises with certain inclination angle and being fixed on signal condition transmitting module 10 with to the light source 7 of sensitive fluorescent membrane 4 emission blue lights be fixed on signal condition transmitting module 10 to receive the fluorescent probe 8 of the red fluorescence that is inspired by sensitive fluorescent membrane 4 under blue light illumination; Described signal condition transmitting module 10 is provided with the driving circuit for driving light source 7; In the present embodiment, described fluorescent probe 8 adopts PIN photodiode.Described light path conditioning unit also comprises the light source optical filter 5 and the fluorescent optical filter 6 that is fixed on fluorescent probe 8 tops that is fixed on described light source 7 tops.The light that described light source optical filter 5 can make light source 7 send plays the effect of filtering parasitic light when passing; Described fluorescent optical filter 6 can see through the fluorescence that inspires and the light that light source 7 sends is filtered; Described fluorescent probe 8 and light source 7 are in the homonymy of sensitive fluorescent membrane 4.
Described detection probe 1 also comprises the digital temperature sensor 9 that is fixed on described sensitive fluorescent membrane 4, it can detect the temperature around the inner sensitive fluorescent membrane 4 of detection probe 1, and send temperature signal to signal condition transmitting module 10, through calculating corresponding temperature correction parameter.
Be provided with digital processing chip in described signal condition transmitting module 10, for the treatment of the output signal of fluorescent probe 8 and the data of collection digital temperature sensor 9, according to this temperature data, the impact of compensation temperature on detection probe 1, eliminate because the detection probe that temperature variation causes 1 output drift realizes the accurate measurement to dissolved oxygen concentration.
As shown in Figure 3, described data acquisition unit 3 comprises single-chip microcomputer and the data acquisition module that is connected with described single-chip microcomputer respectively, data recording memory module, data communication module, data disaply moudle, button service module and energy supply control module, and described data acquisition module is respectively used to the collection of dissolved oxygen concentration signal and temperature signal.Described data acquisition unit 3 adopts lithium battery power supply, and described energy supply control module is used for controlling the charging and discharging state of data acquisition unit 3 lithium batteries, for whole circuit provides stabilized power source, reduces system noise.The button service module according to different key-press status, responds different operations for detection of the key-press status of data acquisition unit 3.Described single-chip microcomputer adopts C8051F020 single-chip microcomputer, the built-in A/D converter of described C8051F020 single-chip microcomputer and dissolved oxygen concentration algorithm.
The dissolved oxygen concentration pick-up unit that uses the utility model to provide is as follows to the dissolved oxygen concentration detection testing process of liquid:
detection probe 1 is dropped into liquid, drop into the degree of depth and can carry out flexible according to measuring needs, the light that light source 7 sends is mapped on the sensitive fluorescent membrane 4 that contacts with liquid through light source optical filter 5, after the red fluorescence that sensitive fluorescent membrane 4 inspires is subject to the cancellation effect of oxygen in liquid, reflex to again fluorescent optical filter 6, absorbed by fluorescent probe 8 at last, convert it into standard current signal through signal condition transmitting module 10, standard current signal is delivered to the collection port of data acquisition unit 3 by data line 2, through carrying out the A/D conversion after the current-voltage conversion, digital signal after the C8051F020 single-chip microcomputer is changed A/D is carried out calculation process, obtain corresponding dissolved oxygen concentration value, data disaply moudle is realized the real-time demonstration to dissolved oxygen concentration and temperature, make the user can the on-the-spot dissolved oxygen DO situation of understanding liquid, and by the data recording memory module, result is preserved, the result of preserving can derive by the data communication module, check on other equipment or process for the user.Whole testing process all grips data acquisition unit 3 by the testing staff with hand and completes, and after measuring end, detection probe 1 is regained from water, and the testing staff carries, and can again drop in water at any time and detect.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and replacement, these improvement and replacement also should be considered as protection domain of the present utility model.
Claims (10)
1. a dissolved oxygen concentration pick-up unit, is characterized in that, this device comprises detection probe (1), data line (2) and data acquisition unit (3);
Described detection probe (1) comprises output terminal and the test side relative with output terminal, and its output terminal is connected by data line (2) with the collection terminal of data acquisition unit (3);
Described detection probe (1) is used for the dissolved oxygen concentration information of liquid is converted into standard current signal;
Described data acquisition unit (3) is used for the standard current signal of detection probe (1) output is converted into the dissolved oxygen concentration signal, and shows.
2. dissolved oxygen concentration pick-up unit according to claim 1, is characterized in that, the output terminal of described detection probe (1) and data line (2) removably connect; The collection terminal of described data acquisition unit (3) and data line (2) removably connect.
3. dissolved oxygen concentration pick-up unit according to claim 2, it is characterized in that, described detection probe (1) comprises the sensitive fluorescent membrane (4) that is fixed near its test side, signal condition transmitting module (10), the light path conditioning unit that is fixed on close its output terminal;
Described light path conditioning unit comprises being fixed on signal condition transmitting module (10) goes up to receive the fluorescent probe (8) of the red fluorescence that is inspired by sensitive fluorescent membrane (4) under blue light illumination to launch the light source (7) of blue light to sensitive fluorescent membrane (4) and to be fixed on signal condition transmitting module (10).
4. dissolved oxygen concentration pick-up unit according to claim 3, is characterized in that, described light path conditioning unit also comprises the light source optical filter (5) that is fixed on described light source (7) and is fixed on fluorescent optical filter (6) on fluorescent probe (8).
5. dissolved oxygen concentration pick-up unit according to claim 3, is characterized in that, described detection probe (1) also comprises the digital temperature sensor (9) that is fixed on described sensitive fluorescent membrane (4).
6. dissolved oxygen concentration pick-up unit according to claim 5, it is characterized in that, be provided with digital processing chip in described signal condition transmitting module (10), for the treatment of the output signal of fluorescent probe (8) and the data of collection digital temperature sensor (9).
7. dissolved oxygen concentration pick-up unit according to claim 3, is characterized in that, the material of described sensitive fluorescent membrane (4) adopts the complex compound based on transition metal.
8. dissolved oxygen concentration pick-up unit according to claim 3, is characterized in that, described fluorescent probe (8) adopts PIN photodiode.
9. dissolved oxygen concentration pick-up unit according to claim 1, is characterized in that, described data line (2) adopts three core copper wire cables with screen layer.
10. dissolved oxygen concentration pick-up unit according to claim 1, it is characterized in that, described data acquisition unit (3) comprises single-chip microcomputer and the data acquisition module that is connected with described single-chip microcomputer respectively, data recording memory module, data communication module, data disaply moudle, button service module and energy supply control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727094 CN203011836U (en) | 2012-12-25 | 2012-12-25 | Dissolved oxygen concentration detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727094 CN203011836U (en) | 2012-12-25 | 2012-12-25 | Dissolved oxygen concentration detecting device |
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| CN203011836U true CN203011836U (en) | 2013-06-19 |
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| CN 201220727094 Expired - Fee Related CN203011836U (en) | 2012-12-25 | 2012-12-25 | Dissolved oxygen concentration detecting device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334303A (en) * | 2015-10-22 | 2016-02-17 | 无锡市永亿精密铸造有限公司 | High-sensitivity water-body oxygen-deficit alarm apparatus |
| CN105548126A (en) * | 2016-02-03 | 2016-05-04 | 南京师范大学 | Detection device and detection method for slidably in-situ measuring dissolved oxygen of muddy water interface |
| CN106353379A (en) * | 2016-09-30 | 2017-01-25 | 温州百岸汽车零部件有限公司 | On-line tester of handheld wide-domain oxygen sensor |
| CN107760565A (en) * | 2017-11-15 | 2018-03-06 | 北京化工大学 | High-throughput mini-bioreactor system |
| CN108458997A (en) * | 2017-12-29 | 2018-08-28 | 北京农业智能装备技术研究中心 | A kind of dissolved oxygen fibre optical sensor |
| CN108956927A (en) * | 2018-09-21 | 2018-12-07 | 中国科学院电工研究所无锡分所 | A kind of high-precision dissolved oxygen detection device |
| CN110031437A (en) * | 2019-04-17 | 2019-07-19 | 青岛同华电力设备有限公司 | A kind of trace level high-accuracy portable dissolved oxygen measuring device based on fluorescence method |
| CN110702872A (en) * | 2019-11-15 | 2020-01-17 | 莫宇林 | Dissolved oxygen monitoring system and method capable of measuring illumination intensity |
-
2012
- 2012-12-25 CN CN 201220727094 patent/CN203011836U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105334303A (en) * | 2015-10-22 | 2016-02-17 | 无锡市永亿精密铸造有限公司 | High-sensitivity water-body oxygen-deficit alarm apparatus |
| CN105548126A (en) * | 2016-02-03 | 2016-05-04 | 南京师范大学 | Detection device and detection method for slidably in-situ measuring dissolved oxygen of muddy water interface |
| CN105548126B (en) * | 2016-02-03 | 2018-06-05 | 南京师范大学 | The detection device and its detection method of slidingtype in situ measurement water sludge interface dissolved oxygen |
| CN106353379A (en) * | 2016-09-30 | 2017-01-25 | 温州百岸汽车零部件有限公司 | On-line tester of handheld wide-domain oxygen sensor |
| CN107760565A (en) * | 2017-11-15 | 2018-03-06 | 北京化工大学 | High-throughput mini-bioreactor system |
| CN108458997A (en) * | 2017-12-29 | 2018-08-28 | 北京农业智能装备技术研究中心 | A kind of dissolved oxygen fibre optical sensor |
| CN108956927A (en) * | 2018-09-21 | 2018-12-07 | 中国科学院电工研究所无锡分所 | A kind of high-precision dissolved oxygen detection device |
| CN110031437A (en) * | 2019-04-17 | 2019-07-19 | 青岛同华电力设备有限公司 | A kind of trace level high-accuracy portable dissolved oxygen measuring device based on fluorescence method |
| CN110702872A (en) * | 2019-11-15 | 2020-01-17 | 莫宇林 | Dissolved oxygen monitoring system and method capable of measuring illumination intensity |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130619 Termination date: 20131225 |