CN112946024B - Method for checking measurement characteristics of residual chlorine sensor - Google Patents
Method for checking measurement characteristics of residual chlorine sensor Download PDFInfo
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Abstract
The invention discloses a method for checking measurement characteristics of a residual chlorine sensor, which comprises the following steps: preparing a sodium hypochlorite standard solution with high concentration, medium concentration and low concentration according to the concentration measurement range of the residual chlorine sensor to be measured; respectively carrying out time-sharing point-by-point measurement on the configured sodium hypochlorite standard solution with high concentration, medium concentration and low concentration by using a high-precision spectrophotometer, and recording and measuring to obtain first measurement data and measurement time about the residual chlorine content; and obtaining a time period with slow decay of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and taking the time period with slow decay of the sodium hypochlorite standard solution as a time period for correction and measurement of the residual chlorine sensor to be measured. The invention can be used for rapidly and accurately detecting the measurement characteristic of the residual chlorine sensor when the measured aqueous medium is in a static state.
Description
Technical Field
The invention relates to the technical field of residual chlorine sensor detection, in particular to a method for detecting measurement characteristics of a residual chlorine sensor.
Background
It is very important to dynamically and truly reflect the water quality condition of the water supply network terminal of the drinking water, and the water quality monitoring and early warning system is required to be established on the network terminal because the water quality safety and the physical health of a user are related. The common practice is to arrange an on-line water quality detection device (composed of a water quality sensor, a measurement cavity, a circulation groove and the like) at a pipe network near a user side, and complete the whole water quality detection process through processes of real-time sampling, flow detection, water discharge detection and the like. Meanwhile, the measured values of the real-time parameters (mainly including residual chlorine, turbidity, pH and the like) of the water quality obtained by detection are remotely transmitted to a water quality early warning platform for data processing and decision making.
The existing online water quality detection modes all need to be measured under the condition of a certain range of flow velocity, namely, the sampling water flows and is measured simultaneously. This results in a significant amount of potable water being discharged into the ground, both wasting water and causing localized land loss or pollution.
The innovative methods proposed at present (the related invention patent has been filed) are: a self-circulation measuring device is arranged in a measured pipe network, drinking water in a measuring cavity is automatically replaced at intervals, and then the measured drinking water is subjected to water quality parameter measurement in a static state; after the measurement is finished, the measured drinking water automatically flows into a water supply pipe network; the above process is repeated accordingly. The method has the following advantages: the measured drinking water is not wasted, and meanwhile, soil nearby the measuring device is not polluted and taken away; the measurement result is irrelevant to the flow velocity of the fluid to be measured, and a magnitude transmission system, a standard solution to be measured and the like are easy to establish.
At present, the online water quality measurement parameters recommended by the country mainly comprise 3 to 4 items, namely: turbidity, pH, residual chlorine, or supplemental conductivity. It is a significant advantage to conduct online measurements of water quality in fluid quiescent states, such as: when turbidity is measured, no additional measurement error is generated due to the flow of fluid; the measurements of pH and conductivity at rest are also more stable and reliable relative to flow. The three sensors are convenient to identify and correct, and can be used in a laboratory corresponding stationary standard liquid.
However, the online measurement of residual chlorine by the counter electrode method is generally required to be performed in a flowing state, because the liquid can improve the measurement sensitivity of the sensor (namely, increase the reaction speed between residual chlorine and the sensor electrode) in the flowing state. Laboratory or field corrections for the measured characteristics of such residual chlorine sensors are currently performed in a flow regime. With the popularization and application of the novel constant-voltage residual chlorine sensor, the sensor can work in the measurement of fluid in a static state under the condition.
When the residual chlorine sensor works in a static state of the measured water medium, how to identify the product quality of the residual chlorine sensor and how to establish a magnitude transmission system, and new ways and methods are needed to be established.
Disclosure of Invention
The invention provides a method for testing the measurement characteristics of a residual chlorine sensor, which can be used for quickly and accurately testing the measurement characteristics of the residual chlorine sensor when a tested water medium is in a static state.
In order to solve the technical problems, the invention provides a method for checking measurement characteristics of a residual chlorine sensor, comprising the following steps:
preparing a sodium hypochlorite standard solution with high concentration, medium concentration and low concentration according to the concentration measurement range of the residual chlorine sensor to be measured;
respectively carrying out time-sharing point-by-point measurement on the configured sodium hypochlorite standard solution with high concentration, medium concentration and low concentration by using a high-precision spectrophotometer, and recording and measuring to obtain first measurement data and measurement time about the residual chlorine content;
obtaining a time period with slow decay of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and taking the time period with slow decay of the sodium hypochlorite standard solution as a time period for correction and measurement of the residual chlorine sensor to be measured;
inserting the residual chlorine sensor to be tested into sodium hypochlorite standard solutions with high concentration, medium concentration and low concentration respectively in the correction and measurement time periods for testing to obtain second measurement data of the three sodium hypochlorite standard solutions on the residual chlorine content;
and judging whether the measurement characteristics of the residual chlorine sensor to be measured are qualified or not based on the first measurement data, the second measurement data and the maximum allowable error.
As a preferable mode of the above technical solution, the method for checking the measurement characteristics of the residual chlorine sensor further includes: and correcting the indication value of the second measurement data through the embedded system when the measurement characteristic of the residual chlorine sensor to be measured is judged to be unqualified.
As a preferable aspect of the above-mentioned technical solution, the high-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution with a concentration close to a maximum value of the concentration measurement range, the medium-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution with a concentration close to a vicinity of an intermediate value of the concentration measurement range, and the low-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution with a concentration of zero.
As the preferable choice of the technical scheme, the sodium hypochlorite standard solution with zero concentration is deionized water.
As a preferable aspect of the above-described technical solution, the obtaining the time period for which the sodium hypochlorite standard solution decays slowly based on the first measurement data and the measurement time includes: and obtaining a concentration decay curve of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and selecting a time period corresponding to a continuous and flat part curve in the concentration decay curve as a time period for correcting and measuring the residual chlorine sensor to be measured.
Preferably, in the above-described technical solution, the concentration decay range value corresponding to the continuous and flat partial curve in the concentration decay curve is less than 5%.
As a preferable aspect of the foregoing technical solution, the determining whether the measurement characteristic of the residual chlorine sensor to be measured is acceptable based on the first measurement data, the second measurement data, and the maximum allowable error includes: and judging whether the fitted curve of the actual measurement characteristic and the fitted concentration curve of the real concentration value exceed the range of the maximum allowable error or not based on the fitted concentration curve of the high, medium and low three-point real concentration values obtained by the first measurement data and the fitted curve of the actual measurement characteristic of the residual chlorine sensor to be measured obtained by the second measurement data.
As a preferable mode of the above technical solution, the inspection method further includes: and judging the consistency or the dispersivity of the measurement result of the residual chlorine sensor to be measured.
As a preferable aspect of the foregoing technical solution, the determining consistency or dispersibility of the measurement result of the residual chlorine sensor to be measured includes: and obtaining an average value of the second measurement data through a plurality of groups of second measurement data with the same concentration, obtaining a characteristic parameter through the second measurement data and the average value thereof, and judging the consistency or the dispersity of the measurement result of the residual chlorine sensor to be measured through the characteristic parameter.
As a preferable mode of the above technical solution, the inspection method further includes: and when the measurement characteristics of the residual chlorine sensor to be measured are judged to be qualified, the residual chlorine sensor to be measured is used as a comparison sensor.
The invention further provides a detection method for measuring stability of the residual chlorine sensor, which comprises the following steps: and (3) obtaining multiple groups of measurement data through multiple times of inspection by the inspection method in any one of the above steps within at least one set time period, fitting the multiple groups of measurement data to obtain a long-term working stability curve, and judging the measurement stability of the residual chlorine sensor based on the long-term working stability curve.
The invention provides a method for checking measurement characteristics of a residual chlorine sensor, which comprises the steps of configuring sodium hypochlorite standard solutions with high, medium and low concentrations according to the concentration measurement range of the residual chlorine sensor to be tested, carrying out time-sharing point-by-point measurement on the sodium hypochlorite standard solutions with the three concentrations respectively through a high-precision spectrophotometer, recording first measurement data and measurement time, obtaining a time period with slow attenuation of the sodium hypochlorite standard solution through the first measurement data and the measurement time, taking the time period as the detection time period of the residual chlorine sensor to be tested, preventing measurement errors of the residual chlorine sensor to be tested due to the fact that the sodium hypochlorite standard solution is excessively fast attenuated, and then measuring the residual chlorine sensor to be tested for the three concentrations respectively in the time period to obtain second measurement data, and judging whether the measurement characteristics of the residual chlorine sensor to be tested are qualified or not through the first measurement data, the second measurement data and the maximum allowable error.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
FIG. 1 is a schematic diagram showing the attenuation curve of a sodium hypochlorite standard solution in an embodiment of the present invention;
FIG. 2 shows a schematic representation of a concentration curve fitted to true concentration values in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a concentration curve fitted to a true concentration value and a curve fitted to an actual measurement characteristic in an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a long-term operation stability curve of the residual chlorine sensor to be tested in the embodiment of the invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions according to the embodiments of the present invention will be clearly described in the following with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a method for checking measurement characteristics of a residual chlorine sensor, which comprises the following specific steps:
preparing a sodium hypochlorite standard solution with high concentration, medium concentration and low concentration according to the concentration measurement range of the residual chlorine sensor to be measured;
respectively carrying out time-sharing point-by-point measurement on the configured sodium hypochlorite standard solution with high concentration, medium concentration and low concentration by using a high-precision spectrophotometer, and recording and measuring to obtain first measurement data and measurement time about the residual chlorine content;
obtaining a time period with slow decay of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and taking the time period with slow decay of the sodium hypochlorite standard solution as a time period for correction and measurement of the residual chlorine sensor to be measured;
respectively inserting the residual chlorine sensor to be measured into sodium hypochlorite standard solutions with high concentration, medium concentration and low concentration in the correction and measurement time periods to test to obtain second measurement data of the three sodium hypochlorite standard solutions on the residual chlorine content;
and judging whether the measurement characteristics of the residual chlorine sensor to be measured are qualified or not based on the first measurement data, the second measurement data and the maximum allowable error.
According to the method for testing the measurement characteristics of the residual chlorine sensor, sodium hypochlorite standard solutions with high, medium and low concentrations are configured according to the concentration measurement range of the residual chlorine sensor to be tested, then the sodium hypochlorite standard solutions with the three concentrations are subjected to time-sharing point-by-point measurement through a high-precision spectrophotometer, the first measurement data and the measurement time are recorded, a time period in which the sodium hypochlorite standard solution is slowly attenuated can be obtained through the first measurement data and the measurement time, the time period is taken as the detection time period of the residual chlorine sensor to be tested, the measurement errors of the residual chlorine sensor to be tested due to the fact that the sodium hypochlorite standard solution is excessively attenuated are prevented, then the residual chlorine sensor to be tested is subjected to measurement on the three concentrations to be tested to obtain second measurement data in the time period, and whether the measurement characteristics of the residual chlorine sensor to be tested are qualified or not is judged through the first measurement data, the second measurement data and the maximum allowable error, so that the time period can be used for rapidly and accurately detecting the measurement characteristics of the residual chlorine sensor when a water medium to be tested is in a static state.
In a further implementation manner of the present embodiment, the method for checking the measurement characteristic of the residual chlorine sensor further includes: and correcting the indication value of the second measurement data through the embedded system when the measurement characteristic of the residual chlorine sensor to be measured is judged to be unqualified.
Specifically, embedded systems are arranged in the residual chlorine sensors, residual chlorine indication values can be corrected through the embedded systems, and measurement errors of the residual chlorine sensors in the actual use process can be corrected.
In a further embodiment of the present example, the high-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration near the maximum value of the concentration measurement range, the medium-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration near the intermediate value of the concentration measurement range, and the low-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration of zero.
The high-concentration sodium hypochlorite standard solution in the embodiment is a sodium hypochlorite standard solution with a concentration close to the maximum value of the concentration measurement range, and the medium-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution with a concentration close to the middle value of the concentration measurement range, so that the whole concentration measurement range is covered by the test range, and meanwhile, the zero-point sodium hypochlorite standard solution is also arranged, so that the performance of the residual chlorine sensor to be tested can be tested, the measurement indication condition of the residual chlorine sensor in the sodium hypochlorite standard solution with the concentration of zero can be obtained, and in addition, various schematic diagrams can be mapped more conveniently.
In a further embodiment of the present example, the standard sodium hypochlorite solution having a zero concentration is deionized water.
The standard solution of sodium hypochlorite in the embodiment is deionized water, so that the accuracy of the test can be improved.
In a further implementation of the present example, obtaining the time period for which the sodium hypochlorite standard solution decays slowly based on the first measurement data and the measurement time includes: and obtaining a concentration decay curve of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and selecting a time period corresponding to a continuous and flat part curve in the concentration decay curve as a time period for correcting and measuring the residual chlorine sensor to be measured.
In the embodiment, the time period for correcting and measuring the residual chlorine sensor to be measured is obtained through the concentration decay curve, and the time period for correcting and measuring the residual chlorine sensor to be measured can be obtained more accurately and rapidly.
In this example, the concentration decay curve of the sodium hypochlorite standard solution is shown in FIG. 1, the ordinate is the concentration value of the sodium hypochlorite standard solution measured by a high-precision spectrophotometer, and the abscissa is the measurement time, and it can be seen from the graph that t 0 To t 1 A continuous and flat part curve betweenA wire.
In a further implementation manner of this embodiment, the concentration decay range value corresponding to the continuous and flat partial curve in the concentration decay curve is less than 5%.
In this embodiment, the concentration attenuation range value corresponding to the continuous and flat partial curve in the concentration attenuation curve is controlled within 5%, so that not only can the measurement accuracy be improved, but also the continuous and flat partial curve can be more conveniently obtained.
With specific reference to FIG. 1, t 0 Corresponding concentration to t 1 The corresponding concentration has a concentration decay of 5% or less, and of course, t may be controlled to improve convenience 0 Corresponding concentration to t 1 The corresponding concentration had a concentration decay equal to 5%.
In a further implementation manner of the present embodiment, determining whether the measurement characteristic of the residual chlorine sensor to be measured is acceptable based on the first measurement data, the second measurement data, and the maximum allowable error includes: and obtaining a concentration curve fitted by the true concentration value based on the first measurement data, obtaining a curve fitted by the actual measurement characteristic based on the second measurement data, and carrying out fitting judgment on the curve fitted by the actual measurement characteristic and the concentration curve fitted by the true concentration value to judge whether the range exceeds the maximum allowable error.
In the embodiment, whether the measurement characteristic condition of the residual chlorine sensor to be measured exceeds the maximum allowable error range is determined by fitting the curve fitted by the actual measurement characteristic and the concentration curve fitted by the actual concentration value, so that the measurement characteristic condition of the residual chlorine sensor to be measured can be more accurately, quickly and intuitively determined.
Referring to fig. 2, a schematic diagram of a concentration curve fitted with real concentration values and a range of maximum allowable errors are shown, wherein an abscissa thereof is an actual concentration of a sodium hypochlorite standard solution, an ordinate thereof is an indication value of a residual chlorine sensor to be measured, and a dotted line parallel to the concentration curve fitted with the real concentration values is a range of maximum allowable errors.
Referring to fig. 3, the curve fitted to the actual measurement characteristic and the concentration curve fitted to the actual concentration value are fitted, wherein it can be seen from the figure that the curve 1 fitted to the actual measurement characteristic is within the range of the maximum allowable error, and the curve 2 fitted to the actual measurement characteristic is out of the range of the maximum allowable error.
In a further implementation of the present embodiment, the testing method further includes: and judging the consistency or the dispersivity of the measurement result of the residual chlorine sensor to be measured.
Specifically, when the consistency or the dispersibility of the measurement result of the residual chlorine sensor to be measured is judged, the consistency or the dispersibility of the measurement result (data) of the instrument or the sensor can be evaluated when the same magnitude is repeatedly measured for a plurality of times, and the reliability of the measurement of any one magnitude of the residual chlorine sensor to be measured under the condition of only one measurement can be further judged.
In a further implementation manner of this embodiment, determining the consistency or dispersibility of the measurement result of the residual chlorine sensor to be measured includes: and obtaining an average value of the second measurement data through a plurality of groups of second measurement data with the same concentration, obtaining a characteristic parameter through the second measurement data and the average value thereof, and judging the consistency or the dispersity of the measurement result of the residual chlorine sensor to be measured through the characteristic parameter.
In the embodiment, the consistency or the dispersibility of the measurement result of the residual chlorine sensor to be measured is judged through the characteristic parameters, so that the consistency or the dispersibility of the measurement result of the residual chlorine sensor to be measured can be accurately and rapidly obtained.
Specifically, when repeating the measurement for three concentrations of sodium hypochlorite standard solution, the second measurement data of each concentration of sodium hypochlorite standard solution can be collected for 5-10 times, wherein n=5-7, the average value is calculated, and the calculation formula of the average value is as followsN=5 to 7, and then calculating a characteristic parameter based on the average value, the calculation formula of which is +.>The characteristic parameter being used to evaluate the instrument or the transmitter when the same magnitude is repeatedly measured a plurality of timesThe sensor measures the consistency or dispersion of the results (data). If this value is small, the meter will be more reliable and less reliable if it is used to measure any one value in the future (e.g., only once).
In a further implementation of the present embodiment, the testing method further includes: and when the measured characteristic of the residual chlorine sensor to be measured is judged to be qualified, the residual chlorine sensor to be measured is used as a comparison sensor.
In the embodiment, the residual chlorine sensor to be detected qualified in detection is used as a comparison sensor, so that the detection requirement in the actual operation process can be further met, the time can be saved, and the detection precision can be improved.
Specifically, after the residual chlorine sensor which is qualified in inspection is used for a period of time on the water quality detection site, the residual chlorine sensor needs to be corrected and compared. In the water quality detection field, the new residual chlorine sensor which is qualified by inspection and the residual chlorine sensor which is used for a period of time are used for measurement and comparison in the water to be detected which is also static (the measurement results of the two sensors are simultaneously read by a special tool), if the difference between the measurement results exceeds a specified value, the compared sensors are retrieved for repair, otherwise, the water to be detected is continuously used.
In this embodiment, the long-term operation stability index of the residual chlorine sensor can be obtained by performing the measurement multiple times every several hours or days in the same manner as described above. Through the above-mentioned inspection and evaluation, can discern the long-term job stabilization nature of residual chlorine sensor that awaits measuring.
In another aspect, the present embodiment provides a method for detecting measurement stability of a residual chlorine sensor, including: and (3) obtaining multiple groups of measurement data through multiple times of inspection by any inspection method within at least one set time period at set time intervals, fitting the multiple groups of measurement data to obtain a long-term working stability curve, and judging the measurement stability of the residual chlorine sensor based on the long-term working stability curve.
Specifically, the set time interval may be selected as required, such as several hours or one day.
Referring to fig. 4, a schematic diagram of a long-term working stability curve of the residual chlorine sensor to be measured is shown, from which the working stability of the residual chlorine sensor to be measured in the long-term use process can be judged, a stability index interval is formed between two broken lines, and when the long-term working stability curve is located between the stability index intervals, the working stability of the residual chlorine sensor to be measured in the long-term use process is proved to be better.
In summary, in this embodiment, when the online water quality detection is in a static state, a corresponding method is adopted to ensure the accuracy and reliability of the measurement of the residual chlorine sensor;
in addition, in the embodiment, a sodium hypochlorite standard solution is established, magnitude transmission and tracing are carried out, and quality characteristics of the residual chlorine sensor are checked and evaluated;
in addition, in the embodiment, the residual chlorine sensor to be detected, which is qualified in detection, is used as the comparison sensor, so that the correction of the residual chlorine sensor on site can be facilitated.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for testing a measurement characteristic of a residual chlorine sensor, comprising:
preparing a sodium hypochlorite standard solution with high concentration, medium concentration and low concentration according to the concentration measurement range of the residual chlorine sensor to be measured;
respectively carrying out time-sharing point-by-point measurement on the prepared sodium hypochlorite standard solution with high concentration, medium concentration and low concentration by using a high-precision spectrophotometer, and recording and measuring to obtain first measurement data and measurement time about the residual chlorine content;
obtaining a time period with slow decay of the sodium hypochlorite standard solution based on the first measurement data and the measurement time, and taking the time period with slow decay of the sodium hypochlorite standard solution as a time period for correction and measurement of the residual chlorine sensor to be measured;
inserting the residual chlorine sensor to be tested into sodium hypochlorite standard solutions with high concentration, medium concentration and low concentration respectively in the correction and measurement time periods for testing to obtain second measurement data of the three sodium hypochlorite standard solutions on the residual chlorine content;
judging whether the measurement characteristics of the residual chlorine sensor to be measured are qualified or not based on the first measurement data, the second measurement data and the maximum allowable error;
the method for checking the measurement characteristics of the residual chlorine sensor further comprises the following steps: correcting an indication value of second measurement data through an embedded system when the measurement characteristics of the residual chlorine sensor to be measured are judged to be unqualified;
the obtaining a time period for which the sodium hypochlorite standard solution decays slowly based on the first measurement data and the measurement time includes: obtaining a concentration decay curve of a sodium hypochlorite standard solution based on first measurement data and measurement time, and selecting a time period corresponding to a continuous and flat partial curve in the concentration decay curve as a correction and measurement time period of a residual chlorine sensor to be measured;
the judging whether the measurement characteristics of the residual chlorine sensor to be measured are qualified or not based on the first measurement data, the second measurement data and the maximum allowable error comprises the following steps: and judging whether the curve fitted by the actual measurement characteristic exceeds the range of the maximum allowable error according to the curve fitted by the actual measurement characteristic and the concentration curve fitted by the actual concentration value, and judging whether the value of the concentration attenuation range corresponding to a continuous and flat part of the concentration attenuation curve is less than 5%.
2. The method according to claim 1, wherein the high-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration near a maximum value of the concentration measurement range, the medium-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration near a middle value of the concentration measurement range, and the low-concentration sodium hypochlorite standard solution is a sodium hypochlorite standard solution having a concentration of zero.
3. The method for testing the measurement characteristics of residual chlorine sensors according to claim 2, wherein the sodium hypochlorite standard solution with zero concentration is deionized water.
4. The method for checking the measurement characteristics of the residual chlorine sensor according to claim 1, further comprising: and judging the consistency or the dispersivity of the measurement result of the residual chlorine sensor to be measured.
5. The method for testing the measurement characteristics of the residual chlorine sensor according to claim 4, wherein the judging of the consistency or the dispersion of the measurement results of the residual chlorine sensor to be tested comprises: and obtaining an average value of the second measurement data through a plurality of groups of second measurement data with the same concentration, obtaining a characteristic parameter through the second measurement data and the average value thereof, and judging the consistency or the dispersity of the measurement result of the residual chlorine sensor to be measured through the characteristic parameter.
6. The method for checking the measurement characteristics of the residual chlorine sensor according to claim 1, further comprising: and when the measurement characteristics of the residual chlorine sensor to be measured are judged to be qualified, the residual chlorine sensor to be measured is used as a comparison sensor.
7. The method for detecting the measurement stability of the residual chlorine sensor is characterized by comprising the following steps of: multiple sets of measurement data are obtained by multiple tests at set time intervals within at least one set time period by the test method of any one of claims 1 to 6, multiple sets of measurement data are fitted to obtain a long-term working stability curve, and the residual chlorine sensor measurement stability is judged based on the long-term working stability curve.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217657U (en) * | 1988-07-22 | 1990-02-05 | ||
| JP2002116182A (en) * | 2000-10-05 | 2002-04-19 | Horiba Ltd | Residual chlorine meter |
| JP2005315640A (en) * | 2004-04-27 | 2005-11-10 | Aichi Tokei Denki Co Ltd | Residual chlorine concentration measuring device and residual chlorine concentration measuring method of service water |
| CN102087240A (en) * | 2009-12-08 | 2011-06-08 | 宁波高新区中科智控技术有限公司 | On-line residual chlorine monitoring self-calibration algorithm |
| CN103293121A (en) * | 2013-05-29 | 2013-09-11 | 上海市计量测试技术研究院 | Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method |
| JP2017053746A (en) * | 2015-09-10 | 2017-03-16 | 東亜ディーケーケー株式会社 | Residual chlorine measurement device and residual chlorine measurement method |
| RU2016109393A (en) * | 2016-03-15 | 2017-09-20 | Федеральное государственное бюджетное научное учреждение "Институт природно-технических систем" (ИПТС) | DEVICE FOR MEASURING SPECIFIC ELECTRICAL CONDUCTIVITY OF LIQUID MEDIA |
| CN108414465A (en) * | 2018-02-05 | 2018-08-17 | 清华大学 | The measurement and prediction technique of chlorine active material and Chlorine Decay in a kind of recycled water |
| CN109250775A (en) * | 2018-11-10 | 2019-01-22 | 连云港市自来水有限责任公司 | Drinking water quality security monitor system and its processing method |
| CN212228800U (en) * | 2020-04-02 | 2020-12-25 | 郑州炜盛电子科技有限公司 | Diaphragm type residual chlorine sensor |
-
2021
- 2021-01-27 CN CN202110122205.7A patent/CN112946024B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0217657U (en) * | 1988-07-22 | 1990-02-05 | ||
| JP2002116182A (en) * | 2000-10-05 | 2002-04-19 | Horiba Ltd | Residual chlorine meter |
| JP2005315640A (en) * | 2004-04-27 | 2005-11-10 | Aichi Tokei Denki Co Ltd | Residual chlorine concentration measuring device and residual chlorine concentration measuring method of service water |
| CN102087240A (en) * | 2009-12-08 | 2011-06-08 | 宁波高新区中科智控技术有限公司 | On-line residual chlorine monitoring self-calibration algorithm |
| CN103293121A (en) * | 2013-05-29 | 2013-09-11 | 上海市计量测试技术研究院 | Residual chlorine standard substance, application of residual chlorine standard substance and residual chlorine tester correction or calibration method |
| JP2017053746A (en) * | 2015-09-10 | 2017-03-16 | 東亜ディーケーケー株式会社 | Residual chlorine measurement device and residual chlorine measurement method |
| RU2016109393A (en) * | 2016-03-15 | 2017-09-20 | Федеральное государственное бюджетное научное учреждение "Институт природно-технических систем" (ИПТС) | DEVICE FOR MEASURING SPECIFIC ELECTRICAL CONDUCTIVITY OF LIQUID MEDIA |
| CN108414465A (en) * | 2018-02-05 | 2018-08-17 | 清华大学 | The measurement and prediction technique of chlorine active material and Chlorine Decay in a kind of recycled water |
| CN109250775A (en) * | 2018-11-10 | 2019-01-22 | 连云港市自来水有限责任公司 | Drinking water quality security monitor system and its processing method |
| CN212228800U (en) * | 2020-04-02 | 2020-12-25 | 郑州炜盛电子科技有限公司 | Diaphragm type residual chlorine sensor |
Non-Patent Citations (5)
| Title |
|---|
| 余氯检测系统的研究与设计;刘升;《中国优秀博硕士学位论文全文数据库(硕士) 信息科技辑》;20070915;第56页 * |
| 基于S3C2440A的嵌入式余氯信息检测装置;刘杰等;湖南工业大学学报(第06期);第89-92页 * |
| 邓立三.气体传感器技术基础.《燃气计量》.黄河水利出版社,2011, * |
| 钟丹等.水管网余氯静态衰减规律及影响因素.《给水管网内余氯衰减模型及耐氯菌多样性分析》.2017, * |
| 隔膜式余氯传感器测量系统的设计及优化;陈冲;《中国优秀博硕士学位论文全文数据库(硕士) 信息科技辑》;20190215;正文第39-42页 * |
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