CN101672778B - Method and device for detecting water quality - Google Patents
Method and device for detecting water quality Download PDFInfo
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- CN101672778B CN101672778B CN2009101020054A CN200910102005A CN101672778B CN 101672778 B CN101672778 B CN 101672778B CN 2009101020054 A CN2009101020054 A CN 2009101020054A CN 200910102005 A CN200910102005 A CN 200910102005A CN 101672778 B CN101672778 B CN 101672778B
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Abstract
The invention discloses a method for detecting water quality, comprising the following steps: a. a light source emits a testing ray to illuminate the water sample to be detected and the water sample to be detected emits an emergent light; b. a detector receives the emergent light; a gas is used for purging the space between the water sample to be detected and the detector, thus taking away the water mist generated by the water sample to be detected; simultaneously, the gas blocks the penetration of the water mist and protects the detector; and c. an analysis unit processes the receiving signal of the detector, thus obtaining the parameter of the water sample to be detected; in the measurement process, whether the purging gas between the water sample to be detected and the detector meets the requirement or not is judged; if so, the measurement is continued; if not, an isolation body is arranged between the water sample to be detected and the detector, thus blocking the water mist generated by the water sample to be detected. The invention also discloses a device for executing the method. The method and the device have the advantages of high measurement precision, long service life of the detector and the like, and can be widely applied to the non-contact water quality detection.
Description
Technical field
The present invention relates to water quality detection, particularly the method for optical method water quality detection and device.
Background technology
In contactless water quality detection, light source and detector are in a side of water sample to be measured.During measurement, the measuring light that light source sends is radiated on the water sample to be measured, and water sample to be measured sends emergent light; Utilize detector to receive described emergent light, analytic unit is handled the signal that detector receives, thereby obtains the parameter of water sample to be measured.In above-mentioned testing process, if water sample to be measured is higher in temperature, the water smoke that water sample to be measured produces can enter between water sample to be measured and the detector, water smoke not only decayed measuring light, emergent light, but also can on detector, condense, had a strong impact on the reception of detector.
In order to eliminate the adverse effect that described water smoke causes measurement, a solution has appearred, as shown in Figure 1 in the prior art.Specific practice is: source of the gas provide gas go to purge space between water sample to be measured and the detector (when the spacing of light source and water sample to be measured hour, also need to purge the space between water sample to be measured and the light source), in order to guarantee the cleaning of purge gas, the gas that source of the gas provides will be removed the wet goods impurity (gas that gas compressor provides contains lubricated wet goods impurity usually) in the gas earlier through filtering.This solution also has some shortcomings, as:
When the purge gas pressure that provides when source of the gas is not enough, the water smoke that water sample to be measured produces arrives detector easily, on the detector (and light source) attached to precision, reduced the receiving light power (output intensity of light source) of detector on the one hand, made measurement result produce deviation; On the other hand also can defective detector, shorten the serviceable life of detector.Water smoke also can attenuation measurement light, emergent light, reduces the transmitance of measuring light, emergent light, thereby increased measuring error.
As seen, when the purge gas insufficient pressure, pick-up unit is in abnormal operating state, and the engineering staff but can't learn.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides the high water quality detection method of a kind of measuring accuracy, and the water quality detecting device of a kind of measuring accuracy height, long service life.
For achieving the above object, the present invention adopts following technical scheme:
A kind of water quality detection method may further comprise the steps:
The measuring light that a, light source send is shone water sample to be measured, and water sample to be measured sends emergent light;
B, the detector that is in water sample one side to be measured receive described emergent light;
Using gases purges the space between water sample to be measured and the detector, the gas that flows has been taken away the water smoke that water sample to be measured produces, and between water sample to be measured and detector, form the gas barrier layer, thereby reduced the decay of water smoke to measuring light, emergent light, stop water smoke on detector, to condense again, protected detector;
C, analytic unit are analyzed the received signal of described detector, thereby obtain the parameter of water sample to be measured;
In above-mentioned measuring process, judge whether the purge gas between water sample to be measured and the detector meets the demands;
If judged result is for being to continue above-mentioned measurement;
If judged result is arranged on isolated body between water sample to be measured and the detector for not, stopped water smoke that water sample to be measured produces to the influence of detector, reduced the decay of water smoke to measuring light and emergent light.
Further, if judged result is not, the pick-up unit prompting is reported to the police.
Further, gas has also purged the space between water sample to be measured and the light source, has taken away the water smoke that water sample to be measured produces, simultaneously described gas barrier to the influence of light source, protected light source.
As preferably, utilize pump to extract gas between water sample to be measured and the detector out, gas flow has purged the space between water sample to be measured and the detector.
As preferably, adopt ejector, detect the pressure or the flow of the injection gas of ejector, thereby whether the gas of judging between water sample to be measured and the detector meets the demands.
As preferably, the gas that utilizes source of the gas to provide goes to purge.
As preferably, utilize air cylinder detecting and judge whether the isolation effect of the flowing gas separation layer between water sample to be measured and the detector meets the demands:
When meeting the demands, not transmission of cylinder isolated body; When not meeting the demands, cylinder transmission isolated body is arranged on described isolated body between water sample to be measured and the detector.
As preferably, described isolated body is the form that can see through described measuring light, emergent light.
In order to realize said method, the invention allows for a kind of like this water quality detecting device, comprise light source, detector and analytic unit; Described pick-up unit also comprises:
One gas purging unit is used to provide the space between gas purging water sample to be measured and the detector, and mobile gas has been taken away the water smoke that water sample to be measured produces, and forms the gas barrier layer between water sample to be measured and detector, has stoped water smoke to condense on detector;
One interlock unit comprises the detection module, judge module, controller and the isolated body that are connected successively; The signal that judge module is sent here according to detection module judges whether the gas between water sample to be measured and the detector satisfies the demand, and then whether decision needs control module that isolated body is arranged between water sample to be measured and the detector.
As preferably, described gas purging unit comprises injection source of the gas, ejector, utilizes ejector to extract gas between water sample to be measured and the detector out.
As preferably, described detection module is pressure or flow detector, is used to detect the injection gas of ejector.
As preferably, described detection module is pressure or flow detector, is arranged between water sample to be measured and the detector.
As preferably, described detection module, judge module and control module are one, adopt cylinder.
As preferably, described isolated body is the printing opacity form.
The present invention compared with prior art has following beneficial effect:
1, measuring accuracy height.By gas purging, can guarantee effectively that the water smoke of water sample generation to be measured is not gone up dewfall at detector (light source), also avoided the decay of water smoke simultaneously, thereby improved the measuring accuracy of instrument measuring light and emergent light.
2, provide perfect monitoring mechanism: gaseous tension or flow between monitoring source of the gas or water sample to be measured and the detector (or light source), thereby whether the isolation effect of understanding the gas barrier layer that flows between water sample to be measured and the detector (and light source) can meet the demands, and then judge whether to keep apart water sample to be measured and detector, can also judge whether prompting warning (optional function), so that the engineering staff removes to safeguard pick-up unit.Above-mentioned monitoring mechanism is a joint-action mechanism, has protected accurate detector (and light source) well, has relatively prolonged the serviceable life of detector.
3, when the flowing gas separation layer that forms in sweep gas can not meet the demands, adopt eyeglass to isolate water sample to be measured and detector as isolated body, whole detection device can also continue to measure (measuring light and emergent light can both pass eyeglass).Though there is deviation in the measurement result of this moment, also has certain reference value.
When 4, adopting cylinder, can discern the pressure of source of the gas automatically as source purge gas detection module, judge module and control module.When insufficient pressure, cylinder drives isolated body and isolates water sample to be measured and detector, has stopped that the water smoke that water sample to be measured produces condenses on detector (and light source), has protected detector (and light source).When the pressure of source of the gas reached requirement, cylinder started automatically, removed isolated body, and pick-up unit recovers normal measurement state.
Description of drawings
Fig. 1 is the structural representation of a solution in the prior art;
Fig. 2 is the structural representation of water quality detecting device in the embodiment of the invention 1;
Fig. 3 is the schematic flow sheet of interlock cell operation in the embodiment of the invention 1;
Fig. 4 is the structural representation of water quality detecting device in the embodiment of the invention 2;
Fig. 5 is the schematic flow sheet of interlock cell operation in the embodiment of the invention 2.
Embodiment
Below in conjunction with embodiment, the present invention is done further detailed description.
Embodiment 1:
As shown in Figure 2, a kind of water quality detecting device comprises light source 11, sample cell 21, detector 31 and analytic unit, also comprises gas purging unit and interlock unit.
Described gas purging unit comprises injection source of the gas 203, ejector 202.When ejector 202 work, extract the gas between sample cell 21 and the detector 31 out, thereby make in the measurement environment gas constantly by and purge space between sample cell 21 and the detector 31, the gas that flows has been taken away the water smoke that water sample to be measured produces, and between water sample to be measured and detector 31, form the gas barrier layer, stop water smoke on detector 31, to condense, prolonged the serviceable life of detector 31, improved the reception precision of detector 31.
Described interlock unit comprises detection module, judge module, control module, isolated body and alarm.The function of described detection module, judge module and control module is all realized by cylinder 201.Described injection source of the gas 203 is communicated with cylinder 201, ejector 202, for cylinder 201, ejector 202 provide gas.
The isolation effect of gas barrier layer depends on the swabbing action of ejector between sample cell 21 and the detector 31, and injection source of the gas 203 has been depended in suction, injection source of the gas 203 provides gas for ejector 202, cylinder 201, therefore detect, judge the pressure of injection source of the gas 203 by cylinder 201, thereby whether the gas barrier layer of judging between sample cell 21 and the detector 31 meets the demands, and then whether decision needs prompting to report to the police, and whether need cylinder 201 that isolated body is arranged between sample cell 21 and the detector 31, isolate sample cell 21 and detector 31.In the present embodiment, when the pressure of injection source of the gas 203 was lower than 200KPa, cylinder 201 was arranged on isolated body 205 (adopting lighttight sheet metal) on the sample cell 21.
Present embodiment has also disclosed a kind of water quality detection method, may further comprise the steps:
Water sample to be measured in the measuring light irradiation sample cell 21 that a, light source 11 send, water sample to be measured sends emergent light;
B, detector 31 receive described emergent light;
Injection source of the gas 203 is supplied with injection gas to ejector 202, ejector 202 work, aspirate out the gas between sample cell 21 and the detector 31, gas stream in the measurement environment is crossed the space between (purging) water sample to be measured and the detector 31, taken away the water smoke that water sample to be measured produces, simultaneously, described gas has formed the gas barrier layer that has stopped that described water smoke passes through, reduced water smoke well to measuring light on the one hand, the decay of emergent light, help to improve the precision that subsequent optical is measured, protect detector 31 (avoiding the influence of water smoke) on the other hand well, improved the measuring accuracy of detector 31, prolonged serviceable life;
C, analytic unit are analyzed the received signal of described detector 31, thereby obtain the parameter of water sample to be measured;
As shown in Figure 3, in above-mentioned measuring process, cylinder 201 detects, judges whether the force value of injection source of the gas 203 meets the demands, and then whether the isolation effect of gas barrier layer meets the demands between judgement sample pond 21 and the detector 31, and (the gas barrier layer is produced by the suction of ejector, therefore, can remove to monitor isolation effect by the pressure of monitoring injection source of the gas 203);
If judged result for being, when the pressure of injection source of the gas 203 is higher than 200KPa, shows that the purge gas between sample cell 21 and the detector 31 meets the demands, cylinder 201 not transmission isolated bodys continue to measure;
If judged result is for denying; when the pressure of injection source of the gas 203 is not higher than 200KPa; the insufficient pressure that shows injection source of the gas 203; (between sample cell 21 and the detector 31) purge gas can not fully be taken away the water smoke that water sample to be measured produces; water smoke can also pass through the gas barrier layer and influence detector 31; and increase is to the decay of measuring light and emergent light; send alerting signal by alarm this moment; the prompting engineering staff safeguards pick-up unit; also need to isolate water sample to be measured and detector; specific practice is: cylinder 201 is arranged on sheet metal between water sample to be measured and the detector 31; sealed sample cell 21; the water smoke that water sample to be measured produces is closed in the sample cell 21, thereby has protected detector 31, has also reduced water smoke to measuring light; the decay of emergent light.
Embodiment 2:
As shown in Figure 4, a kind of water quality detecting device comprises light source 11, sample cell 21, detector 31 and analytic unit, also comprises gas purging unit and interlock unit.
Described gas purging unit comprises source of the gas, filtrator 101.After the gas that source of the gas provides filters through filtrator 101, purge the space between sample cell 21 and detector 31, the light source 11, the gas that flows has been taken away the water smoke that water sample to be measured produces, and between water sample to be measured and detector 31, light source 11, form the gas barrier layer that flows, stoped water smoke on detector 31 and light source 11, to condense, make detector 31 and light source 11 avoid the influence of water smoke, prolonged the serviceable life of detector 31 and received precision, improved the accuracy of light source luminescent intensity.
Described interlock unit comprises flow detector 102, judge module 103, control module 104, isolated body 105 and alarm.Described flow detector 102 is arranged on the downstream of filtrator 101, is used to detect the flow of the gas of outflow filter 101.The output signal of flow detector 102 is sent judge module 103, judge by judge module 103 whether source of the gas meets the demands, whether the gas barrier layer of also promptly judging between sample cell 21 and detector 31, the light source 11 meets the demands (isolation effect of gas barrier layer depends on the gas that source of the gas provides), and then whether decision needs prompting to report to the police, and whether need control module 102 that isolated body 105 is arranged between sample cell 21 and the detector 31, isolate sample cell 21 and detector 31.Control module 104 adopts motor.In the present embodiment, isolated body 105 adopts the eyeglass of the emergent light that sends on the measuring light that can see through light source and send, the water sample to be measured, as fused silica glass.
Present embodiment has also disclosed a kind of water quality detection method, may further comprise the steps:
The measuring light that a, light source 11 send is radiated on the water sample to be measured in the sample cell 21, and water sample to be measured sends emergent light;
B, detector 31 receive described emergent light;
The gas that source of the gas provides flows through the space between (purging) water sample to be measured and detector 31, the light source 11 after filtering through filter 101, has taken away the water smoke that water sample to be measured produces, and simultaneously, described gas has formed the gas barrier layer that has stopped that described water smoke passes through; Reduced the decay of water smoke to measuring light, emergent light, help to improve the precision that subsequent optical is measured, detector 31 and light source 11 (avoiding the influence of water smoke) have been protected on the other hand well, improve the measuring accuracy of detector 31 and the accuracy that light source goes out light intensity, also prolonged the serviceable life of detector 31;
C, analytic unit are analyzed the received signal of described detector 31, thereby obtain the parameter of water sample to be measured;
As shown in Figure 5, in above-mentioned measuring process, flow detector 102 is measured the flow of the gas of outflow filter 101, judge module 103 judges whether meet the demands the isolation effect of described gas barrier layer (purge gas is provided by source of the gas according to the flow value that records, therefore, can remove to obtain the isolation effect of gas barrier layer by the monitoring flow);
If judged result is for being, greater than 10l/min, show that the sweep gas physical efficiency takes away the water smoke of water sample generation to be measured well as flow, the gas barrier layer can stop passing through of described water smoke, continues above-mentioned measurement;
If judged result is for denying, as flow less than 10l/min, show that purge gas can not take away the water smoke that water sample to be measured produces well, the gas barrier layer can not stop passing through of described water smoke well, influenced detector 31, increased the decay of water smoke to measuring light and emergent light, send alerting signal by alarm this moment, the prompting engineering staff safeguards pick-up unit, also need to isolate water sample to be measured and detector 31, specific practice is: motor receives the signal of judge module 103, and fused silica glass is turned between water sample to be measured and the detector 31, sealed sample cell 21, the water smoke that water sample to be measured produces is closed in the sample cell 21.
Whole detection device this moment energy measurement (measuring light and emergent light can both pass fused silica glass) also, measurement result can be used as reference.
Above-mentioned embodiment should not be construed as limiting the scope of the invention.Key of the present invention is, the gas that flows has been taken away the water smoke that water sample to be measured produces, and forms the gas barrier layer between water sample to be measured and detector, thereby has reduced the decay of water smoke to measuring light, emergent light, stop water smoke on detector, to condense again, protected detector; To judge also whether the purge gas between water sample to be measured and the detector meets the demands, and then go decision whether to need to isolate water sample to be measured and detector.Under the situation that does not break away from spirit of the present invention, any type of change that the present invention is made all should fall within protection scope of the present invention.
Claims (13)
1. water quality detection method may further comprise the steps:
The measuring light that a, light source send is shone water sample to be measured, and water sample to be measured sends emergent light;
B, the detector that is in water sample one side to be measured receive described emergent light;
Using gases purges the space between water sample to be measured and the detector, the gas that flows has been taken away the water smoke that water sample to be measured produces, and between water sample to be measured and detector, form the gas barrier layer, thereby reduced the decay of water smoke to measuring light, emergent light, stop water smoke on detector, to condense again, protected detector;
C, analytic unit are handled the received signal of described detector, thereby obtain the parameter of water sample to be measured;
In above-mentioned measuring process, judge whether the purge gas between water sample to be measured and the detector meets the demands;
If judged result is for being to continue above-mentioned measurement;
If judged result is arranged on isolated body between water sample to be measured and the detector for not, stopped water smoke that water sample to be measured produces to the influence of detector, reduced the decay of water smoke to measuring light and emergent light.
2. method according to claim 1 is characterized in that: if judged result is that pick-up unit is not also pointed out warning.
3. method according to claim 1 is characterized in that: gas has also purged the space between water sample to be measured and the light source, has taken away the water smoke that water sample to be measured produces, simultaneously described gas barrier the influence of described water smoke to light source, protected light source.
4. method according to claim 1 is characterized in that: utilize pump to extract gas between water sample to be measured and the detector out, gas flow has purged the space between water sample to be measured and the detector.
5. method according to claim 4 is characterized in that: adopt ejector, detect the pressure or the flow of the injection gas of ejector, whether the gas of judging between water sample to be measured and the detector meets the demands.
6. method according to claim 1 is characterized in that: the gas that utilizes source of the gas to provide goes to purge.
7. according to the arbitrary described method of claim 1 to 6, it is characterized in that: utilize air cylinder detecting and judge whether the isolation effect of the flowing gas separation layer between water sample to be measured and the detector meets the demands:
When meeting the demands, not transmission of cylinder isolated body; When not meeting the demands, cylinder transmission isolated body is arranged on described isolated body between water sample to be measured and the detector.
8. according to the arbitrary described method of claim 1 to 6, it is characterized in that: described isolated body is the form that can see through described measuring light, emergent light.
9. a water quality detecting device comprises light source, detector and analytic unit; It is characterized in that: described pick-up unit also comprises:
One gas purging unit is used to provide the space between gas purging water sample to be measured and the detector, and mobile gas has been taken away the water smoke that water sample to be measured produces, and forms the gas barrier layer between water sample to be measured and detector, has stoped water smoke to condense on detector;
One interlock unit comprises the detection module, judge module, control module and the isolated body that are connected successively; The signal that judge module is sent here according to detection module judges whether the gas between water sample to be measured and the detector satisfies the demand, and then whether decision needs control module that isolated body is arranged between water sample to be measured and the detector.
10. device according to claim 9 is characterized in that: described gas purging unit comprises injection source of the gas, ejector, utilizes ejector to extract gas between water sample to be measured and the detector out.
11. device according to claim 10 is characterized in that: described detection module is pressure or flow detector, is used to detect the injection gas of ejector.
12. according to the arbitrary described device of claim 9 to 11, it is characterized in that: described detection module, judge module and control module are one, adopt cylinder.
13. according to the arbitrary described device of claim 9 to 11, it is characterized in that: described isolated body is the printing opacity form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101020054A CN101672778B (en) | 2009-08-20 | 2009-08-20 | Method and device for detecting water quality |
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| CN2009101020054A CN101672778B (en) | 2009-08-20 | 2009-08-20 | Method and device for detecting water quality |
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| CN101672778A CN101672778A (en) | 2010-03-17 |
| CN101672778B true CN101672778B (en) | 2011-05-18 |
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| CN2009101020054A Active CN101672778B (en) | 2009-08-20 | 2009-08-20 | Method and device for detecting water quality |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105784042A (en) * | 2014-12-24 | 2016-07-20 | 西安北斗星数码信息股份有限公司 | Non-contact-type water quality detection water meter |
| CN105928909A (en) * | 2016-04-29 | 2016-09-07 | 山东五洲检测有限公司 | Water quality detection method |
| CN108801948A (en) * | 2017-05-05 | 2018-11-13 | 上海安杰环保科技股份有限公司 | A kind of separation reaction unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5421194A (en) * | 1991-03-01 | 1995-06-06 | Axiom Analytical, Inc. | Liquid quality analysis system combining sparging and an infrared gas cell |
| EP1693665A1 (en) * | 2005-02-22 | 2006-08-23 | Siemens Aktiengesellschaft | Method and apparatus for trace gas detection |
| CN201488942U (en) * | 2009-08-20 | 2010-05-26 | 聚光科技(杭州)股份有限公司 | Water quality detection device |
-
2009
- 2009-08-20 CN CN2009101020054A patent/CN101672778B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5421194A (en) * | 1991-03-01 | 1995-06-06 | Axiom Analytical, Inc. | Liquid quality analysis system combining sparging and an infrared gas cell |
| EP1693665A1 (en) * | 2005-02-22 | 2006-08-23 | Siemens Aktiengesellschaft | Method and apparatus for trace gas detection |
| CN201488942U (en) * | 2009-08-20 | 2010-05-26 | 聚光科技(杭州)股份有限公司 | Water quality detection device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-91449A 2001.04.06 |
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Effective date of registration: 20120314 Address after: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Co-patentee after: Hangzhou Juguang Environmental Protection Technology Co.,Ltd. Patentee after: Focused Photonics (Hangzhou) Inc. Address before: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Patentee before: Focused Photonics (Hangzhou) Inc. |