CN115406715A - Method for improving quantitative accuracy of water quality on-line monitor - Google Patents
Method for improving quantitative accuracy of water quality on-line monitor Download PDFInfo
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- CN115406715A CN115406715A CN202211047041.7A CN202211047041A CN115406715A CN 115406715 A CN115406715 A CN 115406715A CN 202211047041 A CN202211047041 A CN 202211047041A CN 115406715 A CN115406715 A CN 115406715A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 238000011002 quantification Methods 0.000 claims abstract description 22
- 238000000605 extraction Methods 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 14
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 4
- 238000004445 quantitative analysis Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
- G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
- G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms
- G01F23/2925—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means
- G01F23/2927—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means for several discrete levels, e.g. with more than one light-conducting sensing element
Abstract
The invention belongs to the technical field of water quality on-line monitor quantification, and particularly relates to a method for improving the quantification precision of a water quality on-line monitor, wherein when the position of a photoelectric signal is judged to be not under a normal quantification condition for three times, another metering position can be adopted for assisting quantification; the liquid level is higher than the quantitative position by liquid pumping, and the liquid level is lower than the quantitative position by liquid drainage, so that the pipe wall can be washed during liquid pumping and liquid drainage, wall hanging can be eliminated, and liquid pumping and quantification are performed after liquid drainage, so that the quantitative work is completed.
Description
Technical Field
The invention belongs to the technical field of water quality on-line monitor quantification, and particularly relates to a method for improving the quantification precision of a water quality on-line monitor.
Background
The side surface of a shell of a metering device used by the existing online water quality monitor is provided with an upper group of metering accessories and a lower group of metering accessories which are the same, each metering accessory comprises a pair of light guide columns, a pair of light guide column pressing covers and a pair of emitter screwing nuts which are symmetrically arranged on the two side surfaces of the metering shell, and each light guide column is provided with an infrared emitter and an infrared receiver.
In the prior art, an upper group of high-low level signals and a lower group of high-low level signals are adopted to directly identify and extract liquid, and whether the liquid is successfully extracted is directly judged according to photoelectric signal values when the liquid reaches the high level or the low level. The low level quantitative flow chart is shown in fig. 3, and the measurement is finished only after a simple photoelectric signal judgment. The error rate of the prior art for quantifying liquid is high, the liquid is judged by only one photoelectric signal value when being extracted, the method is easy to have the condition of error identification or metering error, once bubbles or impurities in the liquid extraction system pass through a low-level signal detection position, the method judges the liquid to be extracted successfully by mistake, and serious errors are caused to the whole system.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a method for improving the quantitative accuracy of an online water quality monitor.
The invention provides the following technical scheme:
a method for improving the quantitative accuracy of a water quality on-line monitor comprises the following steps:
s1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the empty tube; if so, carrying out S1.2; if not, the operation is unreasonable, the liquid drainage operation is carried out, and then S1.1.1 is carried out;
s1.1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the blank pipe; if so, carrying out S1.2; if not, unreasonable, performing a pipe washing action, and then performing S1.1.2;
s1.1.2, determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if so, carrying out S1.2; if not, unreasonably performing S1.1.3;
s1.1.3, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if the quantity is reasonable, the quantity is firstly fixed to a high position and then reversely arranged to a low position, and the quantification is finished; if not, the method is unreasonable, and error is reported and ended;
s1.2, recording a low-order photoelectric signal value at the moment as an initial low-order photoelectric signal value; extracting liquid regularly, and judging whether the low-order photoelectric signal value is larger than the floating range of the initial low-order photoelectric signal value after each extraction is finished; if the value is larger than the preset value, S1.3 is carried out; if not, performing next timing liquid extraction, and after the set times of liquid extraction, if the low-level photoelectric signal value is not larger than the initial low-level photoelectric signal value floating range, reporting an error and ending;
s1.3, reversely discharging liquid at regular time, and judging whether the low-order photoelectric signal value is in the floating range of the initial low-order photoelectric signal value after finishing reverse discharging each time; if so, performing S1.4; if not, performing next liquid back-discharge, performing a tube flushing action if the low-level photoelectric signal value is still not in the floating range of the initial low-level photoelectric signal value after the set number of back-discharge times, and then judging whether the high-level photoelectric signal value is in the set range of the empty tube high-level photoelectric signal value; if the quantity is reasonable, the quantity is firstly fixed to a high position and then reversely arranged to a low position, and the quantification is finished; if not, the method is unreasonable, and error is reported and ended;
s1.4, extracting liquid to be quantified to a low level, and completing low level quantification;
the high-order quantification comprises the following steps:
s2.1, judging whether the high-order photoelectric signal value is within a set empty pipe high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonable liquid discharging operation is carried out, and then S2.1.1 is carried out;
s2.1.1 determining whether the high-level photoelectric signal value is within the set empty-pipe high-level photoelectric signal range value; if so, carrying out S2.2; if not, unreasonable, performing a pipe washing action, and then performing S2.1.2;
s2.1.2, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonably performing S2.1.3;
s2.1.3, determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if the quantitative determination is reasonable, the quantitative determination is carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.2, recording the high-order photoelectric signal value at the moment as an initial high-order photoelectric signal value; extracting liquid at regular time, and judging whether the high-order photoelectric signal value is larger than the floating range of the initial high-order photoelectric signal value after extraction is finished each time; if the value is larger than the preset value, S2.3 is carried out; if not, performing next timing liquid extraction, and after the set times of liquid extraction, determining that the high-level photoelectric signal value is not larger than the initial high-level photoelectric signal value floating range, and reporting an error and ending;
s2.3, reversely discharging liquid at regular time, and judging whether the high-order photoelectric signal value is in the floating range of the initial high-order photoelectric signal value after finishing reverse discharging each time; if yes, performing S2.4; if not, performing next liquid back-discharge, performing a tube flushing action if the high-level photoelectric signal value is still not in the floating range of the initial high-level photoelectric signal value after the set number of back-discharge times, and then judging whether the low-level photoelectric signal value is in the set range of the low-level photoelectric signal value of the empty tube; if the quantitative determination is reasonable, the quantitative determination is firstly carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.4, extracting the liquid to a high position to finish high position quantification.
In S1.2, the number of times of liquid extraction was 5.
In S1.3, the number of times of draining liquid is 5.
In S2.2, the number of times of liquid extraction was 5.
In S2.3, the number of times of liquid reverse discharge is 5.
The invention has the beneficial effects that: the invention can prevent bubbles or impurities in the liquid from being identified by mistake, and effectively avoids the situation that the system considers the end of liquid drawing by mistake without starting the liquid drawing because a small part of liquid is left attached to the wall of the metering pipe, thereby reducing the quantitative error rate and avoiding serious system errors. The method comprehensively improves the existing method for directly extracting the liquid for quantification, avoids the situation of signal misidentification caused by liquid splashing or residue, bubbles and the like due to system reasons, and can also effectively solve the abnormal states such as bubbles in the liquid, residue parts of the liquid attached to the wall of the metering tube and the like. Wherein the measuring tube is flushed or the extracted liquid passes up and down near the signal identification position, so that bubbles or liquid residual parts can be eliminated, and the signal identification position is ensured not to be influenced by the liquid and can be normally quantified. When the photoelectric signal position is judged to be not under the normal quantitative condition for three times, the other metering position can be adopted for assisting in quantification, and the quantification possibility and the photoelectric signal position utilization rate are greatly improved.
Drawings
FIG. 1 is a flow chart of the low level quantitation of the present invention;
FIG. 2 is a flow chart of high order quantitation according to the present invention;
FIG. 3 is a prior art quantitative flow chart.
Detailed Description
As shown in figure 1-2, a method for improving the quantitative accuracy of a water quality on-line monitor is characterized in that a starting photoelectric signal is measured by an infrared emitter and an infrared receiver at the beginning of quantification, and the upper and lower limit ranges of the signal are set as distinguishing conditions of an empty pipe and a liquid.
The low-order quantification comprises the following steps:
s1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the empty tube; if so, carrying out S1.2; if not, the liquid is unreasonable, at this time, liquid or impurities possibly exist in the pipe, and the liquid is attached to the residual part of the metering pipe wall, so that liquid drainage is performed, the liquid in the metering pipe is drained to waste liquid, and then S1.1.1 is performed;
s1.1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the blank pipe; if so, carrying out S1.2; if not, unreasonable, carry on the tube flushing action, clear away the intraductal unusual material, clear away the abnormal situation, then carry on S1.1.2;
s1.1.2, determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if so, performing S1.2; if not, unreasonable, the low-order signal does not have the normal quantitative condition, and the high-order quantitative method is adopted for assisting to carry out S1.1.3;
s1.1.3 determining whether the high-level photoelectric signal value is within the set empty-pipe high-level photoelectric signal range value; if the quantitative determination is reasonable, firstly, the quantitative determination is carried out to a high position, and then the reverse discharge is carried out to a low position, so that the quantitative determination is completed; if not, the situation is unreasonable, the error is reported and ended, and the alarm prompts the manual investigation of the field situation;
s1.2, recording the current low-order photoelectric signal value as an initial low-order photoelectric signal value; extracting liquid at regular time, and judging whether the low-order photoelectric signal value is larger than the floating range of the initial low-order photoelectric signal value after extraction is finished each time; if the liquid level is larger than the preset liquid level, the liquid level is higher than the low level, and S1.3 is carried out; if the current value is not larger than the initial low-level photoelectric signal value, performing next timing liquid extraction, after extracting for 5 times, keeping the low-level photoelectric signal value not larger than the initial low-level photoelectric signal value floating range, reporting an error, finishing, and alarming to prompt manual on-site condition investigation; the pipe wall can be washed in the process of pumping liquid every time, so that wall hanging is eliminated;
s1.3, reversely discharging liquid at regular time, and judging whether the low-level photoelectric signal value is in the floating range of the initial low-level photoelectric signal value after finishing reverse discharging each time; if yes, the liquid is lower than the low level, and S1.4 is carried out; if the liquid is not discharged, performing next liquid reverse discharge, and after 5 times of reverse discharge, if the low-level photoelectric signal value is still not in the floating range of the initial low-level photoelectric signal value, performing a tube flushing action, cleaning abnormal substances in the tube by adopting a mode of flushing the metering tube, and then judging whether the high-level photoelectric signal value is in a set high-level photoelectric signal range value of the empty tube; if the quantitative determination is reasonable, firstly, the quantitative determination is carried out to a high position, and then the reverse discharge is carried out to a low position, so that the quantitative determination is completed; if not, the system is unreasonable, error is reported and ended, and an alarm is given to prompt manual investigation of the field situation;
s1.4, extracting liquid to be quantified to a low level, and completing low level quantification;
the high-order quantification comprises the following steps:
s2.1, judging whether the high-order photoelectric signal value is within a set empty pipe high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonable liquid discharging operation is carried out, and then S2.1.1 is carried out;
s2.1.1, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if so, performing S2.2; if not, unreasonable pipe flushing operation is carried out, and then S2.1.2 is carried out;
s2.1.2, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonably performing S2.1.3;
s2.1.3 determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if the quantitative determination is reasonable, the quantitative determination is carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.2, recording the high-order photoelectric signal value at the moment as an initial high-order photoelectric signal value; extracting liquid regularly, and judging whether the high-order photoelectric signal value is larger than the floating range of the initial high-order photoelectric signal value after each extraction is finished; if the value is larger than the preset value, S2.3 is carried out; if not, performing next time of timing liquid extraction, after extracting for 5 times, the high-level photoelectric signal value is still not larger than the initial high-level photoelectric signal value floating range, reporting an error and ending;
s2.3, reversely discharging liquid at regular time, and judging whether the high-order photoelectric signal value is in the floating range of the initial high-order photoelectric signal value after finishing reverse discharging each time; if so, performing S2.4; if not, performing next liquid back-discharge, performing a tube flushing action if the high-level photoelectric signal value is still not in the floating range of the initial high-level photoelectric signal value after 5 times of back-discharge, and then judging whether the low-level photoelectric signal value is in the set range of the low-level photoelectric signal value of the empty tube; if the quantitative determination is reasonable, the quantitative determination is carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.4, extracting the liquid to a high position to finish high position quantification.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for improving the quantitative accuracy of a water quality on-line monitor is characterized by comprising the following steps of:
s1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the empty tube; if so, carrying out S1.2; if not, the operation is unreasonable, the liquid drainage operation is carried out, and then S1.1.1 is carried out;
s1.1.1, judging whether the low-level photoelectric signal value is within a set range value of the low-level photoelectric signal of the blank pipe; if so, performing S1.2; if not, unreasonable, performing a pipe washing action, and then performing S1.1.2;
s1.1.2, determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if so, carrying out S1.2; if not, unreasonably performing S1.1.3;
s1.1.3 determining whether the high-level photoelectric signal value is within the set empty-pipe high-level photoelectric signal range value; if the quantitative determination is reasonable, firstly, the quantitative determination is carried out to a high position, and then the reverse discharge is carried out to a low position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s1.2, recording the current low-order photoelectric signal value as an initial low-order photoelectric signal value; extracting liquid at regular time, and judging whether the low-order photoelectric signal value is larger than the floating range of the initial low-order photoelectric signal value after extraction is finished each time; if the value is larger than the preset value, S1.3 is carried out; if not, performing next timing liquid extraction, and after the set times of liquid extraction, if the low-level photoelectric signal value is not larger than the initial low-level photoelectric signal value floating range, reporting an error and ending;
s1.3, reversely discharging liquid at regular time, and judging whether the low-level photoelectric signal value is in the floating range of the initial low-level photoelectric signal value after finishing reverse discharging each time; if so, performing S1.4; if not, performing next liquid reverse drainage, performing a tube flushing action if the low-level photoelectric signal value is still not in the floating range of the initial low-level photoelectric signal value after the set times of reverse drainage, and then judging whether the high-level photoelectric signal value is in the set high-level photoelectric signal range value of the empty tube; if the quantitative determination is reasonable, firstly, the quantitative determination is carried out to a high position, and then the reverse discharge is carried out to a low position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s1.4, extracting liquid to be quantified to a low level to complete low level quantification;
the high-order quantitative method comprises the following steps:
s2.1, judging whether the high-order photoelectric signal value is within a set empty pipe high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonable liquid drainage is carried out, and then S2.1.1 is carried out;
s2.1.1, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if so, carrying out S2.2; if not, unreasonable, performing a pipe washing action, and then performing S2.1.2;
s2.1.2, determining whether the high-order photoelectric signal value is within the set empty-tube high-order photoelectric signal range value; if so, performing S2.2; if not, unreasonably performing S2.1.3;
s2.1.3, determining whether the low-level photoelectric signal value is within the set empty pipe low-level photoelectric signal range value; if the quantitative determination is reasonable, the quantitative determination is carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.2, recording the current high-order photoelectric signal value as an initial high-order photoelectric signal value; extracting liquid at regular time, and judging whether the high-order photoelectric signal value is larger than the floating range of the initial high-order photoelectric signal value after extraction is finished each time; if the value is larger than the preset value, S2.3 is carried out; if not, performing next timing liquid extraction, and after the set times of liquid extraction, if the high-level photoelectric signal value is not larger than the floating range of the initial high-level photoelectric signal value, reporting an error and ending;
s2.3, reversely discharging liquid at regular time, and judging whether the high-order photoelectric signal value is in the floating range of the initial high-order photoelectric signal value after finishing reverse discharging each time; if so, performing S2.4; if not, performing next liquid back-discharge, performing a tube flushing action if the high-level photoelectric signal value is still not in the floating range of the initial high-level photoelectric signal value after the set number of back-discharge times, and then judging whether the low-level photoelectric signal value is in the set range of the low-level photoelectric signal value of the empty tube; if the quantitative determination is reasonable, the quantitative determination is firstly carried out to the low position, and then the liquid is pumped to the high position, so that the quantitative determination is completed; if not, the method is unreasonable, and error is reported and ended;
s2.4, extracting the liquid to a high position to finish high position quantification.
2. The method for improving the quantitative accuracy of the water quality on-line monitor according to claim 1, which comprises the following steps: in S1.2, the number of times of liquid extraction was 5.
3. The method for improving the quantitative accuracy of the water quality on-line monitor according to claim 1, which is characterized in that: in S1.3, the number of times of draining liquid is 5.
4. The method for improving the quantitative accuracy of the water quality on-line monitor according to claim 1, which is characterized in that: in S2.2, the number of times of liquid extraction was 5.
5. The method for improving the quantitative accuracy of the water quality on-line monitor according to claim 1, which comprises the following steps: in S2.3, the number of times of liquid reverse discharge is 5.
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Denomination of invention: A method to improve the quantitative accuracy of online water quality monitoring instruments Granted publication date: 20230516 Pledgee: Bank of China Limited Jianhu Branch Pledgor: Jiangsu Box Technology Co.,Ltd. Registration number: Y2024980010494 |