CN105510548A - Water quality real-time monitoring system instrument calibration method for complex water environment - Google Patents
Water quality real-time monitoring system instrument calibration method for complex water environment Download PDFInfo
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Abstract
The invention discloses a water quality real-time monitoring system instrument calibration method for a complex water environment. A sensor probe for sensing specific water quality parameters is placed into a water body to be monitored; an electric signal is read by utilizing a computer and is taken as a horizontal ordinate; accurate concentration parameters of the water quality to be measured are obtained by other methods; the measurement results are taken as a longitudinal ordinate; a regression curve is established; multi-point calibration is directly performed by taking the water to be measured as a standard solution. According to the calibration method, the real-time characteristics of the water quality can be described accurately on the basis of the conventional instrument calibration technology, and by combing the characteristics of complexity of the water environment and adopting the data monitored in real time; a field test is performed by the device involved in the calibration method in underground water; results show that the measurement results are relatively accurate on that day and the subsequent measurement results are far from the actual concentration when the instrument is calibrated by utilizing the conventional method, while the real-time measurement results are relatively identical with laboratory analysis results within one week of continuous monitoring when the instrument is calibrated by utilizing the method.
Description
Technical field
The invention belongs to environment monitoring technical field, be specifically related to a kind of water quality real-time monitoring system instrument calibration method being applicable to Complex Water Environment.
Background technology
Along with day by day highlighting of ecological environment problem, no matter international community or the protection of China to water environment are more and more paid attention to, water quality monitoring and evaluate the important evidence becoming the policy of environment protection of government department.Due to the impact of the factors such as China is vast in territory, topography and geomorphology is complicated, region on a large scale, the monitoring of long series relies on traditional personal monitoring to waste time and energy, even cannot realize, real-time automatic monitoring becomes current popular tendency both domestic and external, American-European countries is more advanced than China in the research and development of surface water and groundwater real-time monitoring system, and these instruments play an important role in China's monitoring water environment.But, find in application process, various real-time monitoring instrument can Accurate Determining water quality in process of the test, but satisfied result cannot be obtained under Complex Water Environment, mainly owing to there is the interference of various factors in the water environment of some complexity in this, comprise the variation of other interfering ions in a series of outside environmental elements and water body, this just to determine after laboratory investment in these Complex Water Environment cannot the concentration of Accurate Determining pollutant, this becomes the important bottleneck of restriction water quality real time monitoring application and development, for these reasons, a kind of foundation being applicable to the water quality real-time monitoring system instrument calibration method of Complex Water Environment feature becomes current great demand.
Summary of the invention
For this reason, problem to be solved by this invention is the problem how simultaneously taking into account water environment complicacy in conjunction with prior art, and then proposes that a kind of science is easy, the instrument calibration method be applicable under Complex Water Environment condition.
The object of the invention is with following technical proposals realize:
A kind of water quality real-time monitoring system instrument calibration method for Complex Water Environment, by the sensor probe of the specific water quality parameter of induction is placed in water body to be measured, computing machine is utilized to read electric signal in real time, as horizontal ordinate, and obtain water quality parameter concentration to be determined accurately with additive method, using measurement result as ordinate, set up regression curve, water to be measured is directly carried out multiple spot calibration as standard solution.
In a calibration process, need sensor probe to be immersed in water body to be measured, read a secondary data every the 4-6min time interval, until when electric signal is stablized using stable electrical signal as horizontal ordinate, the water body additive method to be measured getting sensor probe immersion place obtains its actual concentrations, as ordinate; Determine that the minute of 1 electric signal should be no more than 30 minutes, when in 30 minutes, electric signal is stablized not yet, then reclocking.
Electric signal is stable to be referred to: in 30 minutes, change in electric amplitude is no more than 5%, or after two minor peaks and twice valley appear in electric signal, when next electric signal and above-mentioned peak value, valley average value are no more than 5%, thinks that it is stationary value.
Calibration curve needs electric signal and the concentration of two and above correspondence.
Every 25-35 days, prediction checking is carried out to the method, when error at measurment exceeds tolerance limit, need calibration be re-started.
Technique scheme of the present invention has following characteristics compared to existing technology: 1, this method relies on existing instrumental correction technology, simultaneously Bound moisture environmental complexity feature; 2, this device adopts Real-time Monitoring Data, accurately can portray the real-time characteristic of water quality; 3, device described in the present invention is carried out site test by applicant in underground water, result shows, conventional method is utilized to calibrate, its measurement result can only ensure that the same day is comparatively accurate, measurement result departs from actual concentrations far away afterwards, and utilizing this method in the week age of monitoring continuously, its real time measure and Analytical Laboratory Results are comparatively identical.Comprehensively above-mentioned 3 points, this method has broad application prospects.
Accompanying drawing explanation
Fig. 1 is calibration operation schematic diagram of the present invention;
Fig. 2 is the calibration curve adopting this method and laboratory to obtain;
Fig. 3 is the measurement result that the calibration curve adopting this method and laboratory to obtain in continuous 7 days obtains.
Embodiment
A kind of water quality real-time monitoring system instrument calibration method for Complex Water Environment, by scene, the sensor probe of the specific water quality parameter of induction is placed in the water body of circumstance complication to be measured, computing machine is utilized to read electric signal in real time, as horizontal ordinate, and with additive method as chemistry, galvanochemistry obtain water quality parameter concentration to be determined accurately, using measurement result as ordinate, set up regression curve, water to be measured is directly carried out multiple spot calibration as standard solution.
In a calibration process, need sensor probe to be immersed in water body to be measured, a secondary data is read every the 4-6min time interval, until when electric signal is stablized using stable electrical signal as horizontal ordinate, the water body additive method to be measured getting sensor probe immersion place obtains its actual concentrations, as ordinate, a point on calibration curve now can be determined; Determine that the minute of 1 electric signal should be no more than 30 minutes, when in 30 minutes, electric signal is stablized not yet, water quality now may change, then reclocking; Electric signal is stable to be referred to: in 30 minutes, change in electric amplitude is no more than 5%, or after two minor peaks and twice valley appear in electric signal, when next electric signal and above-mentioned peak value, valley average value are no more than 5%, thinks that it is stationary value.
After determining on above-mentioned typical curve point, repeat above-mentioned steps, determine the on-site measurement concentration that another electric signal is corresponding, determine second point of calibration curve, when needs are quantitative exactly, determine calibration curve at available 5 ~ 9, usual 2 ~ 3 points.
Regularly should carry out prediction checking to the method, be generally 25-35 days, when error at measurment exceeds tolerance limit, need calibration be re-started.The calibration of instrument parameter when the method is not only applicable to monitor general surface water and underground water water body, the underground water applicability when measurement result error that, common laboratory calibration steps complicated to environmental characteristic obtains is larger, inapplicable is stronger.
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, the probe of sensor 1 is immersed in water body 2 to be measured, then the USB interface of sensor 1 is linked on computer 3, open the correction program software that instrument carries, then a water body voltage was measured with computer 3 every 2 minutes, sample thief 4 from water body to be measured simultaneously, utilize other chemistry, its concentration of method on-site measurement such as galvanochemistry, after electric signal is stable, the measured concentration of sample 4 is filled out concentration place corresponding in correction software, 1 row is added after confirming, according to the method described above, input another concentration in a program, confirm, like this by determining 2 ~ 9 points, draw confirmed standard curve, just automatically can monitor water quality later, in observation process, need whether also meet typical curve through the card of posteriority after a while result, incongruent words are calibrated again.
Adopt the result of this method and laboratory investment method contrast chlorine detection ion below.
First, in laboratory, utilize chemical reagent configuration standard solution, and at laboratory internal calibration instrument, pollutant Cl in the monitor well of monitoring somewhere
-concentration one week, and record data, in addition, adopt this method, the method such as water sampling chemistry or galvanochemistry measures pollutant levels in water body at the scene, is immersed by sensor probe in above-mentioned monitoring well water, after electric signal is stable, calibrate, and to water pollutant concentration C l
-monitor one week, and record data, the typical curve that laboratory investment curve and this method are determined, as shown in Figure 2, adopt two kinds of methods monitoring result of a week as shown in Figure 3, the Cl of the 7th day laboratory investment method mensuration can be found out
-cl in concentration substantial deviation underground water
-actual concentration, and the result of this method is still comparatively realistic.
The above-mentioned experiment that applicant carries out shows, at least within one week, this method can the concentration of pollutant in Accurate Determining Complex Water Environment, but still need during long term monitoring regularly to carry out verifying or revising in conjunction with measured value, cause monitoring result to depart from reality to guarantee water environment interference factor to undergo mutation.
Claims (5)
1. the water quality real-time monitoring system instrument calibration method for Complex Water Environment, it is characterized in that: by the sensor probe of the specific water quality parameter of induction is placed in water body to be measured, computing machine is utilized to read electric signal in real time, as horizontal ordinate, and obtain water quality parameter concentration to be determined accurately with additive method, using measurement result as ordinate, set up regression curve, water to be measured is directly carried out multiple spot calibration as standard solution.
2. as claimed in claim 1 for the water quality real-time monitoring system instrument calibration method of Complex Water Environment, it is characterized in that: in a calibration process, need sensor probe to be immersed in water body to be measured, a secondary data is read every the 4-6min time interval, until when electric signal is stablized using stable electrical signal as horizontal ordinate, the water body additive method to be measured getting sensor probe immersion place obtains its actual concentrations, as ordinate; Determine that the minute of 1 electric signal should be no more than 30 minutes, when in 30 minutes, electric signal is stablized not yet, then reclocking.
3. as claimed in claim 2 for the water quality real-time monitoring system instrument calibration method of Complex Water Environment, it is characterized in that electric signal is stable to refer to: in 30 minutes, change in electric amplitude is no more than 5%, or after two minor peaks and twice valley appear in electric signal, when next electric signal and above-mentioned peak value, valley average value are no more than 5%, think that it is stationary value.
4. as claimed in claim 1 for the water quality real-time monitoring system instrument calibration method of Complex Water Environment, it is characterized in that: calibration curve needs electric signal and the concentration of two and above correspondence.
5. as claimed in claim 1 for the water quality real-time monitoring system instrument calibration method of Complex Water Environment, it is characterized in that: every 25-35 days, prediction checking is carried out to the method, when error at measurment exceeds tolerance limit, need calibration be re-started.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018505A (en) * | 2016-05-10 | 2016-10-12 | 交通运输部公路科学研究所 | Calibration method for concrete chlorine ion content meter |
| CN107643335A (en) * | 2016-07-20 | 2018-01-30 | 复凌科技（上海）有限公司 | A kind of method for detecting water environment |
| CN108760664A (en) * | 2018-05-26 | 2018-11-06 | 北京逸智联科技有限公司 | A kind of multi-parameter water-quality automatic detection analysis method |
| CN108918801A (en) * | 2018-05-18 | 2018-11-30 | 管永美 | Based on the method for improving water body index monitoring system data reliability than surveying calibration method |
| CN108985576A (en) * | 2018-06-26 | 2018-12-11 | 华北水利水电大学 | A kind of Valuation Method of River'S Ecosystem Services |
| CN109765338A (en) * | 2018-12-29 | 2019-05-17 | 北京英视睿达科技有限公司 | The bearing calibration of diffusivity environmental contaminants monitoring device and system and replacing options |
| CN110346257A (en) * | 2019-05-16 | 2019-10-18 | 华北水利水电大学 | A method of measuring native stone mixture infiltration process |
| CN111323544A (en) * | 2020-03-27 | 2020-06-23 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
| DE102019114341A1 (en) * | 2019-05-28 | 2020-12-03 | Endress+Hauser Conducta Gmbh+Co. Kg | Method for checking the functionality of an ion-selective electrode assembly |
| CN115060867A (en) * | 2022-06-27 | 2022-09-16 | 广州喜露宝科技有限公司 | High-precision water quality monitoring method capable of realizing continuous calibration |
| CN115639335A (en) * | 2022-10-20 | 2023-01-24 | 石家庄瑞澳科技有限公司 | Water quality monitoring data calibration method, system and computer readable storage medium |
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| CN201429526Y (en) * | 2009-03-16 | 2010-03-24 | 刘宪武 | Sample collection system for domal calibration of water turbidity meter |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018505A (en) * | 2016-05-10 | 2016-10-12 | 交通运输部公路科学研究所 | Calibration method for concrete chlorine ion content meter |
| CN107643335A (en) * | 2016-07-20 | 2018-01-30 | 复凌科技（上海）有限公司 | A kind of method for detecting water environment |
| CN108918801A (en) * | 2018-05-18 | 2018-11-30 | 管永美 | Based on the method for improving water body index monitoring system data reliability than surveying calibration method |
| CN108760664B (en) * | 2018-05-26 | 2021-02-05 | 吉林省林海雪原饮品有限公司 | Water quality multi-parameter automatic detection and analysis method |
| CN108760664A (en) * | 2018-05-26 | 2018-11-06 | 北京逸智联科技有限公司 | A kind of multi-parameter water-quality automatic detection analysis method |
| CN108985576A (en) * | 2018-06-26 | 2018-12-11 | 华北水利水电大学 | A kind of Valuation Method of River'S Ecosystem Services |
| CN109765338A (en) * | 2018-12-29 | 2019-05-17 | 北京英视睿达科技有限公司 | The bearing calibration of diffusivity environmental contaminants monitoring device and system and replacing options |
| CN110346257A (en) * | 2019-05-16 | 2019-10-18 | 华北水利水电大学 | A method of measuring native stone mixture infiltration process |
| DE102019114341A1 (en) * | 2019-05-28 | 2020-12-03 | Endress+Hauser Conducta Gmbh+Co. Kg | Method for checking the functionality of an ion-selective electrode assembly |
| CN111323544A (en) * | 2020-03-27 | 2020-06-23 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
| CN111323544B (en) * | 2020-03-27 | 2022-09-20 | 沈阳沃尔鑫环保科技有限公司 | Calibration method and system based on miniature air quality monitoring instrument |
| CN115060867A (en) * | 2022-06-27 | 2022-09-16 | 广州喜露宝科技有限公司 | High-precision water quality monitoring method capable of realizing continuous calibration |
| CN115639335A (en) * | 2022-10-20 | 2023-01-24 | 石家庄瑞澳科技有限公司 | Water quality monitoring data calibration method, system and computer readable storage medium |
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