CN107884535A - A kind of water quality online analyzer self-checking device and calibration method - Google Patents
A kind of water quality online analyzer self-checking device and calibration method Download PDFInfo
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- CN107884535A CN107884535A CN201711220074.6A CN201711220074A CN107884535A CN 107884535 A CN107884535 A CN 107884535A CN 201711220074 A CN201711220074 A CN 201711220074A CN 107884535 A CN107884535 A CN 107884535A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 163
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000002156 mixing Methods 0.000 claims abstract description 27
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 70
- 238000003149 assay kit Methods 0.000 claims description 47
- 238000010790 dilution Methods 0.000 claims description 44
- 239000012895 dilution Substances 0.000 claims description 44
- 239000011259 mixed solution Substances 0.000 claims description 33
- 239000012452 mother liquor Substances 0.000 claims description 27
- 238000012360 testing method Methods 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 17
- 238000004458 analytical method Methods 0.000 claims description 16
- 230000037361 pathway Effects 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 238000004457 water analysis Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 3
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 8
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- 238000012795 verification Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
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- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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Abstract
The invention discloses a kind of water quality online analyzer self-checking device and calibration method, including host computer, the first control module A, the second control module B, the 3rd control module C, circuit control panel, solution mixing pit (1), mixing pit feed tube (2), Y-type three way type (3), the first syringe pump (4), the second syringe pump (5), peristaltic pump (6), magnetic stirrer (7), detection liquid pipe (8), the present invention is not only high with liquid precision, while can be to the automatic calibration of water quality online analyzer.
Description
Technical field
The present invention relates to automatic in a kind of calibrating installation design method, more particularly to a kind of Water Test Kits calibrating installation
The design of calibrating installation.
Background technology
In environment water monitoring system, typically water body parameter is detected using online water analysis instrument, online water
Whether the accuracy of detection of matter analyzer meets national verification regulatory requirements, general to use the manually metering to online water analysis instrument
Performance is calibrated, and the time cycle of artificial detection in-line analyzer length (generally requiring 36 hours).Therefore there is an urgent need to one
The unattended technology that Water Test Kits can be calibrated of kind.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of high with liquid precision, automatic school
Accurate water quality online analyzer self-checking device and calibration method.
Technical scheme：To achieve the above object, the technical solution adopted by the present invention is：
A kind of water quality online analyzer self-checking device, including host computer, the first control module A, the second control module
B, the 3rd control module C, circuit control panel, solution mixing pit (1), mixing pit feed tube (2), Y-type three way type (3), the first injection
Pump (4), the second syringe pump (5), peristaltic pump (6), magnetic stirrer (7), detection liquid pipe (8), wherein：
The Y-type three way type (3) is the pipe fitting of two import one outlets, respectively the first inlet tube, the second inlet tube with
And first outlet pipe, the liquid feeding end of first syringe pump (4) are used to be connected with standard mother liquid multi-cavity bottle by the first feed tube (41),
And outlet end is connected by the first drain pipe (42) with the first inlet tube of Y-type three way type (3), and first inlet tube and first
Junction between drain pipe (42) is provided with the first feed liquor check valve (43) for preventing that liquid from flowing back；First feed tube
(41) prevent liquid from flowing back first is provided with and goes out liquid check valve (44)；The liquid feeding end of second syringe pump (5) is used to lead to
The second feed tube (51) is crossed to be connected with dilution bottle, and outlet end is entered by the second drain pipe (52) and the second of Y-type three way type (3)
Mouth pipe connection, and the junction of second inlet tube and the second drain pipe (52) is provided with the second feed liquor for preventing that liquid from flowing back
Check valve (53), and second drain pipe (52), second go out liquid check valve (54) and the second inlet tube is sequentially connected；It is described
First goes out liquid check valve (44) closing mouth goes out liquid check valve (44) outlet to the distance L that the first inlet tube exports less than 4 times first
End pipe footpath r；Prevent liquid from flowing back second is provided with second feed tube (51) and goes out liquid check valve (54)；Described first goes out
Mouth pipe is connected by mixing pit feed tube (2) with the feed pathway (11) of mixed solution pond (1)；Mixed solution pond (1) bag
Include with open major trough body (11), groove lid (12), the groove lid (12) is used to cover the opening in major trough body (11), closing master
Cell body (11), the hollow groove of the major trough body (11) are shaped as infundibulate, feed pathway are provided with the major trough body (11)
(111) liquid flow pass (112) and apocenosis passage (113), are detected, the inlet of the apocenosis passage (113) is positioned at hollow
The bottom of groove, and the inlet of the feed pathway (111) is higher than the inlet of detection liquid flow pass (112), and meanwhile it is described
The inlet of apocenosis passage (113) is less than the inlet of detection liquid flow pass (112), the detection liquid flow pass (112)
For being connected by detecting liquid pipe (8) with Water Test Kits inlet；The magnetic stirrer (7) includes electromagnet fixed seat
(71), electromagnet (72), stirrer (73), the electromagnet fixed seat (71) are used to electromagnet (72) being fixed on major trough body
(11) bottom, and the stirrer (73) is arranged in hollow groove；
The first control signal that the first control module A is used to be sent according to host computer controls the first syringe pump (4) to inhale
Take and push operation, first syringe pump (4) is used to draw standard mother liquid multi-cavity bottle according to the first control signal, after absorption
Liquid is pushed in mixed solution pond (1) according to the first control signal；
The second control signal that the second control module B is used to be sent according to host computer controls the second syringe pump (5) to inhale
Take and push operation, second syringe pump (5) are used to draw dilution bottle according to the second control signal, liquid after absorption
Body is pushed in mixed solution pond (1) according to the second control signal；
The 3rd control signal that the 3rd control module C is used to be sent according to host computer controls peristaltic pump (6) to mixing
Solution pool (1) is aspirated；
The 4th control signal control magnetic stirrer (7) that the circuit control panel is used to be sent according to host computer is stirred
Mix；
The Water Test Kits is used to detect the liquid come in from detection liquid pipe (8), and testing result is uploaded
To host computer；
The host computer is used to control the first control module A, the second control module B, the 3rd control module C and circuit
Plate sends the first control signal, the second control signal, the 3rd control signal and the 4th control signal；The host computer is used simultaneously
In receiving the testing result of Water Test Kits, and draw according to testing result and national standard the judgement report of the Water Test Kits
Accuse.
Preferably：Star-like handle nut (121) is provided with the groove lid (12).
Preferably：The place that the groove lid (12) is in contact with opening is provided with sealing ring.
Preferably：Fixed block hole (711) is provided with the electromagnet fixed seat (71)；Discharging tube leads to through fixed seat
Hole (711) is connected with apocenosis passage (113), and peristaltic pump (6) is provided with the discharging tube.
Preferably：Described second, which goes out liquid check valve (54), closes mouth to the distance L that the second inlet tube exports less than 4 times second
Go out liquid check valve (54) port of export caliber r.
A kind of automatic calibrating method of water quality online analyzer self-checking device, comprises the following steps：
Step 1, testing staff connects the upper machine communication mouth of the PORT COM of detected Water Test Kits and calibrating installation
Connect, the sampling system of detected Water Test Kits and detection liquid pipe (8) are attached；
Step 2, the standard mother liquid multi-cavity bottle equipped with standard liquid mother liquor is connected with the first feed tube (41)；Dilution will be housed
Dilution bottle connected with the second feed tube (51)；By the solution concentration after the concentration of standard liquid mother liquor and dilution input to
Host computer；
Step 3, host computer calculates according to the solution concentration after the concentration of standard liquid mother liquor and dilution and obtains standard liquid
The amount of mother liquor and the amount of dilution, and then draw the first syringe pump (4) amount of feed and the second syringe pump (5) amount of feed；Host computer
First control signal is sent to the first control module A according to the first syringe pump (4) amount of feed, is fed according to the second syringe pump (5)
Measure to the second control module B and send the second control signal, host computer sends the 4th control signal to circuit control panel；
Step 4, the first control module A controls the first syringe pump (4) to be drawn from standard mother liquid multi-cavity bottle according to the first control signal
Standard liquid mother liquor；Second control module B controls the second syringe pump (5) to draw dilution from dilution bottle according to the second control signal
Liquid；Second control module B controls the second syringe pump (5) first to note dilution to mixed solution pond (1) according to the second control signal
Enter, then the first control module A controls the first syringe pump (4) by standard liquid mother liquor to mixed solution according to the first control signal
Pond (1) is injected, and standard liquid mother liquor has at least injected when dilution injection is completed；
Step 5, circuit control panel controls electromagnet (72) to be stirred drive to stirrer (73) according to the 4th control signal
It is dynamic, and then the liquid in mixed solution pond (1) is stirred；
Step 6, after the completion of solution is prepared, computer sends sampling instruction to detected Water Test Kits, is detected water quality
Analyzer carries out sampling work after receiving instruction to solution in mixed solution pond (1), is detected Water Test Kits by point of water quality
Analysis information is uploaded to host computer；
Step 7, host computer is analyzed being detected Water Test Kits according to the analysis information for being detected Water Test Kits
The automatic calibration of detection.
Preferably：Host computer carries out the error of indication, null offset, stability of display's analysis work to being detected Water Test Kits
Make.
The present invention compared with prior art, has the advantages that：
The present invention can match somebody with somebody liquid precision height, while can be to the automatic calibration of water quality online analyzer.
Brief description of the drawings
Fig. 1 is the principle schematic of the present invention；
Fig. 2 is the workflow schematic diagram of the present invention；
Fig. 3 is the structural representation of the present invention；
Fig. 4 is the structural representation of solution mixing pit；
Fig. 5 is the schematic perspective view of solution mixing pit；
Fig. 6 is electromagnetism fixed seat structure schematic diagram；
Fig. 7 is groove lid structural representation；
Fig. 8 is the structural representation of threeway.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these examples are merely to illustrate this
Invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are various to the present invention's
The modification of the equivalent form of value falls within the application appended claims limited range.
A kind of water quality online analyzer self-checking device, as shown in figures 1-8, including host computer, the first control module A,
Second control module B, the 3rd control module C, circuit control panel, solution mixing pit (1), mixing pit feed tube (2), Y-type three way type
(3), the first syringe pump (4), the second syringe pump (5), peristaltic pump (6), magnetic stirrer (7), detection liquid pipe (8), wherein：
The Y-type three way type (3) is the pipe fitting of two import one outlets, respectively the first inlet tube, the second inlet tube with
And first outlet pipe, the liquid feeding end of first syringe pump (4) are used to be connected with standard mother liquid multi-cavity bottle by the first feed tube (41),
And outlet end is connected by the first drain pipe (42) with the first inlet tube of Y-type three way type (3), and first inlet tube and first
Junction between drain pipe (42) is provided with the first feed liquor check valve (43) for preventing that liquid from flowing back.First drain pipe
(42) prevent liquid from flowing back first is provided with and goes out liquid check valve (44).The liquid feeding end of second syringe pump (5) is used to lead to
The second feed tube (51) is crossed to be connected with dilution bottle, and outlet end is entered by the second drain pipe (52) and the second of Y-type three way type (3)
Mouth pipe connection, and the junction of second inlet tube and the second drain pipe (52) is provided with the second feed liquor for preventing that liquid from flowing back
Check valve (53).Prevent liquid from flowing back second is provided with second feed tube (51) and goes out liquid check valve (54).
The purpose for setting Y-type three way type (3) mainly reduces the first syringe pump (4), the second syringe pump (5) and solution mixing pit
(1) length of pipe between, if the first syringe pump (4), the second syringe pump (5) are respectively with two pipelines and solution mixing pit (1)
Connection, then add the dead volume in pipeline, has influence on the configuration precision of solution, therefore the present invention uses Y-type three way type (3) by two
Root pipeline is merged into a pipeline, reduces the length of pipeline, and then reduces the dead volume in pipeline, improves matching somebody with somebody for solution
Put precision.
First purpose for going out liquid check valve (44) setting has two, and first is to prevent liquid from being flowed back from Y-type three way type (3),
It is another to be, when first go out liquid check valve (44) closing mouth go out liquid check valve less than 4 times first to the distance L that the first inlet tube exports
(44) during port of export caliber r, first goes out liquid check valve (44) exports to form turbulence structure with the first inlet tube, when the first liquid stops
When only being flowed into mixing pit feed tube (2), go out first between liquid check valve (44) closing mouth exports to the first inlet tube and have
First liquid, flowed into when second liquid continues through Y-type three way type (3) in mixing pit feed tube (2), due to the first inlet tube, the
Angle be present between two inlet tubes so that the outlet of the first inlet tube is rushed at from the second liquid of the second inlet tube outflow, with first
Inlet tube outlet is collided, and the second liquid of collision rift forms turbulent flow, within and around the outlet of the first inlet tube of agitation, first
The solution gone out in liquid check valve (44), and then enter first and go out in liquid check valve (44), when turbulent flow goes out liquid check valve to first
(44) when closing mouth, due to closing the stop of mouth, turbulent flow returns, and the return of turbulent flow is by the first solution gone out in liquid check valve (44)
Take out of, and then realize the exchange of the first solution gone out in liquid check valve (44), i.e., going out liquid check valve (44) closing mouth by first arrives
The first liquid having between the outlet of first inlet tube is gradually diluted by the effect of turbulent flow to be taken out of, avoids Liquid Residue from matching somebody with somebody solution
The influence of system, and then improve the configuration precision of solution.Similarly understand the second setting purpose for going out liquid check valve (54).
Described first goes out liquid check valve (44) closing mouth goes out liquid list to the distance L that the first inlet tube exports less than 4 times first
To valve (44) port of export caliber r, described second, which goes out liquid check valve (54), closes mouth to the distance L that the second inlet tube exports less than 4
Second goes out liquid check valve (54) port of export caliber r again.First go out liquid check valve (44) close mouth to the first inlet tube export away from
More short better from a distance from L, distance is shorter, and turbulent flow is bigger, can preferably contradict second and go out liquid check valve (54) closing
Solution at mouthful.
As long as ensureing angle be present between the first inlet tube, the second inlet tube, best angle is Y-type three way type (3)
45 °, using PTEF materials, the Y-type three way type of special angle make the connecting line in calibrating installation is as short as possible, dead volume as far as possible
It is small.
Using PTEF materials, the Y-type three way type of special angle makes that the connecting line in calibrating installation is as short as possible, dead volume is most
May be small.Due to being provided with the first feed liquor check valve (43), first going out liquid check valve (44), the second feed liquor check valve (53),
Two go out liquid check valve (54) so that when extracting test solution, push pipe test solution will not return for the first syringe pump (4), the second syringe pump (5)
Stream.Check valve uses PTEF materials, and diaphragm material is fluorubber, latus rectum 2mm, pressure-resistant 0.8mpa.
Further, since prevent liquid from flowing back second is provided with the junction of the second inlet tube and the second drain pipe (52)
Feed liquor check valve (53), therefore when the second syringe pump (5) stops injecting, the first syringe pump (4) is also in injection, due to first
Angle be present between inlet tube, the second inlet tube, the dilution entered from the first inlet tube can rinse the under the effect of the pressure
The water export of two inlet tubes so that the standard mother liquor in the second inlet tube in dead volume flows down in the flushing of dilution
Go out, avoid the dead volume of the second inlet tube outlet port from having influence on liquid precision.
The first outlet pipe is connected by mixing pit feed tube (2) with the feed pathway (11) of mixed solution pond (1).Institute
Stating mixed solution pond (1) is included with open major trough body (11), groove lid (12), and the groove lid (12) is used to cover in major trough body
(11) in opening, major trough body (11) is closed, star-like handle nut (121), the groove lid are provided with the groove lid (12)
(12) place being in contact with opening is provided with sealing ring.The hollow groove of the major trough body (11) is shaped as infundibulate, described
Feed pathway (111), detection liquid flow pass (112) and apocenosis passage (113), the discharge opeing are provided with major trough body (11)
The inlet of passage (113) is located at the bottom of hollow groove, and the inlet of the feed pathway (111) go out higher than detection liquid stream it is logical
The inlet in road (112), while the inlet of the apocenosis passage (113) is less than the inlet of detection liquid flow pass (112),
The detection liquid flow pass (112) is used to connect with Water Test Kits inlet by detecting liquid pipe (8).
The present invention is arranged at the bottom of hollow groove using feed pathway (111) so that dilution and standard mother liquor are from mixing
Solution pool (1) bottom enters mixed solution pond (1), when so preventing that stirrer 73 from rotating, dilution and standard mother liquor is beaten and flown
On mixed solution pond (1) inwall, the mixed-precision of solution is influenceed.In addition, when having solution in mixed solution pond (1), stirring
Son begins to work to mix test solution, accelerates mixing velocity.The present invention carries out mixing pit, while top using solution from bottom of pond portion
Capping, this structure can reduce the influence of the evaporation of solution, mixing pool wall solution wall built-up phenomenon to precision preparation.
The detection liquid flow pass (112) of the present invention is similarly provided at the bottom of hollow groove, and pipeline is sealed in a manner of pressure ring
And connect, this structure can improve solution utilization rate and the stability of pipeline.This other structure can also work in stirrer 73
When, it can be sampled from mixed solution pond (1), when avoiding stirrer 73 and being stopped, mixed solution produces depositional phenomenon, influences
To the analysis of Water Test Kits.In addition, from during detection liquid flow pass (112) sampling, to remove the waste sample of front half section, prevent from examining
The dead volume for survey liquid flow pass (112), detecting in liquid pipe (8) remains, and has influence on the analysis of Water Test Kits.
The inlet of apocenosis passage (113) is arranged at the bottom of hollow groove, it can be ensured that the abundant discharge of waste liquid.
The magnetic stirrer (7) includes electromagnet fixed seat (71), electromagnet (72), stirrer (73), the electromagnetism
Ferropexy seat (71) is used to for electromagnet (72) to be fixed on the bottoms of major trough body (11), and the stirrer (73) be arranged at it is hollow
In groove.
The present invention uses magnetic stirrer (7), has two purposes, one is to speed up the mixing of solution, and two are to speed up major trough body
(11) drying.When solution mixes, because stirrer (73) rotates under electromagnet (72) effect, pass through stirrer (73)
Rotate so that solution mixes evenly.When drying, rotated by stirrer (73) and produce wind, caused wind is in major trough body
(11) the hollow groove rotation in, accelerates the evaporation of solution on major trough body (11) inwall, is then made by the suction of peristaltic pump (6)
With, humid air is extracted out from major trough body (11), therefore the drying of major trough body (11) is accelerated, avoid raffinate from having influence on next time molten
The configuration precision of liquid.
The first control signal that the first control module A is used to be sent according to host computer controls the first syringe pump (4) to inhale
Take and push operation, first syringe pump (4) is used to draw standard mother liquid multi-cavity bottle according to the first control signal, after absorption
Liquid is pushed in mixed solution pond (1) according to the first control signal.
The second control signal that the second control module B is used to be sent according to host computer controls the second syringe pump (5) to inhale
Take and push operation, second syringe pump (5) are used to draw dilution bottle according to the second control signal, liquid after absorption
Body is pushed in mixed solution pond (1) according to the second control signal.
The 3rd control signal that the 3rd control module C is used to be sent according to host computer controls peristaltic pump (6) to mixing
Solution pool (1) is aspirated；
The 4th control signal control magnetic stirrer (7) that the circuit control panel is used to be sent according to host computer is stirred
Mix；
The Water Test Kits is used to detect the liquid come in from detection liquid pipe (8), and testing result is uploaded
To host computer；
The host computer is used to control the first control module A, the second control module B, the 3rd control module C and circuit
Plate sends the first control signal, the second control signal, the 3rd control signal and the 4th control signal；The host computer is used simultaneously
The water quality point is drawn in the testing result for receiving Water Test Kits, and according to the technical indicator of testing result and national verification code
The judgement report of analyzer.
A kind of water quality online analyzer calibration method, comprises the following steps：
Step 1, testing staff connects the upper machine communication mouth of the PORT COM of detected Water Test Kits and calibrating installation
Connect, the sampling system of detected Water Test Kits and detection liquid pipe (8) are attached.
Step 2, the standard mother liquid multi-cavity bottle equipped with standard liquid mother liquor is connected with the first feed tube (41)；Dilution will be housed
Dilution bottle connected with the second feed tube (51)；By the solution concentration after the concentration of standard liquid mother liquor and dilution input to
Host computer.
Step 3, host computer calculates according to the solution concentration after the concentration of standard liquid mother liquor and dilution and obtains standard liquid
The amount of mother liquor and the amount of dilution, and then draw the first syringe pump (4) amount of feed and the second syringe pump (5) amount of feed；Host computer
First control signal is sent to the first control module A according to the first syringe pump (4) amount of feed, is fed according to the second syringe pump (5)
Measure to the second control module B and send the second control signal, host computer sends the 4th control signal to circuit control panel, controlled to second
Molding block B sends the 4th control signal.
Step 4, the first control module A controls the first syringe pump (4) to be drawn from standard mother liquid multi-cavity bottle according to the first control signal
Standard liquid mother liquor；Second control module B controls the second syringe pump (5) to draw dilution from dilution bottle according to the second control signal
Liquid；Second control module B controls the second syringe pump (5) first to note dilution to mixed solution pond (1) according to the second control signal
Enter, then the first control module A controls the first syringe pump (4) by standard liquid mother liquor to mixed solution according to the first control signal
Pond (1) is injected, and standard liquid mother liquor has at least injected when dilution injection is completed.
Step 5, circuit control panel controls electromagnet (72) to be stirred drive to stirrer (73) according to the 4th control signal
It is dynamic, and then the liquid in mixed solution pond (1) is stirred.
Step 6, after the completion of solution is prepared, computer sends sampling instruction to detected Water Test Kits, is detected water quality
Analyzer carries out sampling work after receiving instruction to solution in mixed solution pond (1), is detected Water Test Kits by point of water quality
Analysis information is uploaded to host computer；And the analysis work such as the error of indication, null offset, stability of display is carried out, will after the completion of analysis
Analyze data is sent to computer.
Step 7, host computer is analyzed being detected Water Test Kits according to the analysis information for being detected Water Test Kits
The automatic calibration of detection, and judgement report is generated, data result can trace to the source.
Automatic calibration refers to the communications protocol that calibrating installation is provided by water quality online analyzer manufacturing enterprise, realization pair
The instruction transmission of instrument and data receiver, by program set in advance complete to " error of indication " of instrument, " null offset ",
The detection work of projects such as " stability of display ", calibration item can be adjusted according to by the difference of test examination instrument, be not limited to above-mentioned
Three.It is automatic to refer to after experimenter's selection carries out experiment option, in whole calibration process, examination is changed without artificial
Agent, without it is artificial it is on duty, without manual record data.Whole process is automatically performed by calibrating installation.
The host computer includes the error of indication, null offset, indicating value to the project for being detected Water Test Kits analysis detection
Stability.
The testing process and computational methods (COD) of 7.1 errors of indication
After Water Test Kits stable operation, it is C to import mass concentration successivelySThe COD standards of (50,150,500mg/L)
Solution is measured respectively, and continuously measurement 3 times of every kind of solution, the error of indication is calculated as follows：
Wherein, Δ C represents the error of indication,Represent to be detected Water Test Kits measurement of concetration average value, after Cs represents dilution
Solution concentration.
The testing process and computational methods (COD) of 7.2 null offsets：
After Water Test Kits stable operation, the first syringe pump (4), the second syringe pump (5) are controlled to mixed by computer
Close solution pool (1) and prepare zero point correction liquid, the zero point correction liquid prepared is imported and is detected Water Test Kits measurement zero point school
Quasi- liquid, record the initial zero value Z of measurement0, a zero point correction is imported to detected Water Test Kits every 30min in 4h
Liquid, measure zero point indicating value Zi, take and deviate Z0Maximum zero point indicating value ZiAs maximum zero point indicating value Zmax, by maximum zero point indicating value
ZmaxWith initial zero value Z0Difference as null offset.
7.3 show the testing process and computational methods (COD) for referring to stability：
After Water Test Kits stable operation, the first syringe pump (4), the second syringe pump (5) are controlled to mixed by computer
Close solution pool (1) and prepare Standard Calibration Solutions；The Standard Calibration Solutions prepared are imported to detected Water Test Kits, record is just
Beginning measured value S0, continuously runs 24h；A Standard Calibration Solutions are imported to detected Water Test Kits every 1h in 24h, are surveyed
Measured value Si is obtained, takes and deviates the maximum measured value Si of initial measurement S0 as greatest measurement Smax, according to below equation meter
Calculate stability of display：
Δ S represents stability of display, SmaxRepresent greatest measurement, S0Represent initial measurement.
The error of indication, null offset, stability of display's index are to measure the evaluation index of specification Instrumental metering performance, people
When work is evaluated, artificial 40 hours on duty and processing data are needed, this calibrating installation is alternative to be manually automatically performed above-mentioned metering performance
Appraisal.
Present invention various concentrations corresponding to different detection projects in detection process to same Water Test Kits to be detected
The replacing of detection solution realized by the automatic function equipment of solution of calibrating installation, therefore without manually change reagent, together
When the present invention using the detection solution of same device proportioning various concentrations, reduce null offset, stability of display and the error of indication
The human error of testing result.
The host computer of the present invention can use computer or other central processing units in addition, each function can by based on Windows And WinOperating system is realized, transmittable to do sample instruction and receive data, and by data
Processing forms after calculating and reports and can provide the whether qualified conclusion of Water Test Kits to be detected.
Step 8, after the completion of the detection of some detectable concentration solution, host computer sends the 3rd control to the 3rd control module C
Signal, the 3rd control module C control peristaltic pump to discharge the waste liquid in solution mixing pit, and waste liquid closes peristaltic pump after excluding, and enters
The preparation of the next detectable concentration point of row；
Before next detectable concentration point is prepared after waste liquid discharge, in addition to solution mixing pit is cleaned and dried, its side
Method is as follows：Control architecture B controls the second syringe pump (5) to draw dilution from dilution bottle, is injected into mixed solution pond (1),
Host computer sends the 4th control signal to circuit control panel, starts magnetic stirrer (7) and mixed solution pond (1) is cleaned,
Cleaning finishes, and controls peristaltic pump to discharge by the 3rd control signal, so cleaning more than 3 times；Finally, the 3rd control signal is passed through
Peristaltic pump is opened in control, starts magnetic stirrer (7) by the 4th control signal so that and stirrer (73) rotates, and then quickly
Dry mixed solution pool (1).
The present invention solution uncertainty that dilutes to obtain based on calibrating installation is less than 3% (k=2), and can by with country
The mode that secondary reference material compares is traced to the source to National primary standard, therefore its Data Data result can trace to the source.
In the present embodiment, the first syringe pump (4) of the invention and the second syringe pump (5) use constant displacement pump, the quantitative pump housing
Product：10ml, when constant displacement pump specification selects between 5ml, 10ml and 25ml, experiment shows quantitative injection pump using two 10ml's
Specification, operability, the precision highest of solution preparation.Constant displacement pump precision：2uL/ is walked.Constant displacement pump motor speed can be according to actual need
Adjust, this instrument uses speed as 30 revs/min (adjustable), and experiment shows the pump push volume accuracy highest under the speed.
Reset mode：Constant displacement pump is mounted with optoelectronic switch in maximum push point (i.e. reset position), first with constant displacement pump before liquid
Reset, to ensure before preparing solution every time, do not have to be full of dilution in remaining liquid, each pipeline in constant displacement pump.
Remaining liquid control in pipeline：In process for preparation, when carrying out constant displacement pump push, pipeline remains that liquid is full of
State, and by program optimization, remain that the push of mother liquor is first completed, the push of dilution finally completes, and ensures pipeline
The liquid being inside full of is always dilution (pure water), improves and prepares repdocutbility, to reach the purpose of control accuracy.
While efficiency is taken into account, latus rectum 2mm pipeline is selected, connecting line overall length is as far as possible short, and caliber is as small as possible, subtracts
Few dead volume.Each part is connected by the polytetrafluoro pipe of high temperature resistant, soda acid, and pipe interface is by the way of pressure ring sealing, therefore
Junction contact area is small, and dead volume is small.Compared with raw material band sealing means, sealing is more reliable, and operability is more convenient, whole
It is individual make sample during, this connected mode is completely fixed pipeline, non-loosening phenomenon, reduce detection fault rate.Polytetrafluoro pipe chi
Very little is 2.85*1.25mm.
Calibrating installation matches somebody with somebody liquid, is examined through potassium bichromate solution absorbance, and solution prepares error and is less than ± 2%, whole system
System deviation be present, now repeated property experiment is when host computer generates the first control signal and the second control signal, middle introducing
System improvement factor K, mechanical liquid mixing system error can be reduced so that global error is better than ± 1%.Specifically prioritization scheme is：
Compound concentration is c0Potassium bichromate solution mother liquor, solution absorbance A is measured under 440nm0, existed using calibrating installation
Solution is prepared under different distribution ratios, the theoretical absorbance A of solution is calculated using distribution ratios1-Asi, reality is measured under similarity condition
Border absorbance AX1-AXi, calculate the improvement factor K under different distribution ratios1-Ki, when matching solution, consider this improvement factor, rise
To the effect for reducing systematic error.Improvement factor K is stable within the time of x months, can be again after calibrating installation long-play
The absorbance time is carried out, adjusts improvement factor.
Theoretical thinner ratio in(x：Y) refer to that the first syringe pump (4) draws the volume x of mother liquor：Second syringe pump (5) is drawn
The volume y of dilution.
Thinner ratio in=x/ (x+y)
Theoretical absorbance Asi=A0*in, solution theory concentration c after dilutionsi=c0*in,
Systematic correction factor Ki=Axi/Asi
Actual compound concentration cxi=Ki*csi
Actual thinner ratio ln=Kiin
Repeated data through test of many times are respectively to KiCalculated, when mother liquid concentration is fixed, and select specific objective
Solution concentration ciWhen, first calculate theoretical distribution ratio in, reuse KiIt is modified, thinner ratio I after amendmentn.In host computer generation the
Thinner ratio I is added when one control signal and the second control signaln, change the stepper motor steps of quantitative injection pump to change dv
Value, In=(x+dv)/(x+dv+y-dv), the solution concentration error prepared after now correcting reduce systematic error part.
The water quality online analyzer of the present invention is online including being not limited to COD (COD) in-line analyzer, ammonia nitrogen
Analyzer etc. uses water quality parameter point applied to the live non-laboratory of water head site, discharge of industrial wastes mouth, water body environment monitoring point
Analyzer device.
The present invention can one be pushed to field calibration Water Test Kits, the mobility of calibrating installation ensure that molten during analysis
Liquid it is now with the current, compared with traditional artificial preparation solution is brought to field assay, it is no longer necessary to consider low concentration detect solution
Preservation problem and solution prepare site requirements, solution prepare repeatability it is higher.
The present invention realizes the Full-automatic calibration to water quality online analyzer, it is unattended according to predetermined criteria or will
(technical specification such as such as national metrological verification regulations, calibrating standard) is asked, all measuring indexs of water quality online analyzer are carried out
A series of continuous continual analysis tests, gathered data is simultaneously analyzed and processed, and judges whether calibration result meets phase
The index request of pass, generate corresponding original calibrated report.The reserved output port with external data communication, realize calibration result
Long-range collection prepare.Whole process realizes intelligent processing method, completely without manual intervention.Meanwhile device possesses automatic dimension
The function of guarantor, being capable of automatic clean and maintenance, lifting device reliability of operation and stability in running clearance or holding state.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
- A kind of 1. water quality online analyzer self-checking device, it is characterised in that：Including host computer, the first control module A, second Control module B, the 3rd control module C, circuit control panel, solution mixing pit (1), mixing pit feed tube (2), Y-type three way type (3), First syringe pump (4), the second syringe pump (5), peristaltic pump (6), magnetic stirrer (7), detection liquid pipe (8), wherein：The Y-type three way type (3) is the pipe fitting of two import one outlets, respectively the first inlet tube, the second inlet tube and the One outlet, the liquid feeding end of first syringe pump (4) is used to be connected with standard mother liquid multi-cavity bottle by the first feed tube (41), and goes out Liquid end is connected by the first drain pipe (42) with the first inlet tube of Y-type three way type (3), and first inlet tube and first goes out liquid Junction between pipe (42) is provided with the first feed liquor check valve (43) for preventing that liquid from flowing back；Prevent liquid from flowing back first is provided with first feed tube (41) and goes out liquid check valve (44)；Second syringe pump (5) liquid feeding end is used to be connected with dilution bottle by the second feed tube (51), and outlet end passes through the second drain pipe (52) and Y The second inlet tube connection of type threeway (3), and the junction of second inlet tube and the second drain pipe (52) is provided with and prevented Second feed liquor check valve (53) of liquid backflow, and second drain pipe (52), second go out liquid check valve (54) and second Inlet tube is sequentially connected；Described first, which goes out liquid check valve (44), closes mouth to the distance L that the first inlet tube exports less than 4 times first Go out liquid check valve (44) port of export caliber r；Prevent liquid from flowing back second is provided with second feed tube (51) and goes out liquid list To valve (54)；The first outlet pipe is connected by mixing pit feed tube (2) with the feed pathway (11) of mixed solution pond (1)； The mixed solution pond (1) is included with open major trough body (11), groove lid (12), and the groove lid (12) is used to cover in major trough body (11) in opening, major trough body (11) is closed, the hollow groove of the major trough body (11) is shaped as infundibulate, the major trough body (11) feed pathway (111), detection liquid flow pass (112) and apocenosis passage (113), the apocenosis passage are provided with (113) inlet is located at the bottom of hollow groove, and the inlet of the feed pathway (111) is higher than detection liquid flow pass (112) inlet, while the inlet of the apocenosis passage (113) is less than the inlet of detection liquid flow pass (112), institute Detection liquid flow pass (112) is stated to be used to connect with Water Test Kits inlet by detecting liquid pipe (8)；The magnetic stirrer (7) electromagnet fixed seat (71), electromagnet (72), stirrer (73) are included, the electromagnet fixed seat (71) is used for electromagnetism Iron (72) is fixed on the bottom of major trough body (11), and the stirrer (73) is arranged in hollow groove；The first control signal that the first control module A is used to be sent according to host computer control the first syringe pump (4) draw and Push operation, first syringe pump (4) are used to draw standard mother liquid multi-cavity bottle according to the first control signal, liquid after absorption It is pushed to according to the first control signal in mixed solution pond (1)；The second control signal that the second control module B is used to be sent according to host computer control the second syringe pump (5) draw and Push operation, second syringe pump (5) are used to draw dilution bottle according to the second control signal, liquid root after absorption It is pushed to according to the second control signal in mixed solution pond (1)；The 3rd control signal control peristaltic pump (6) that the 3rd control module C is used to be sent according to host computer is to mixed solution Aspirated in pond (1)；The 4th control signal control magnetic stirrer (7) that the circuit control panel is used to be sent according to host computer is stirred；The Water Test Kits is used to detect the liquid come in from detection liquid pipe (8), and testing result is uploaded to Position machine；The host computer is used to send out the first control module A, the second control module B, the 3rd control module C and circuit control panel Go out the first control signal, the second control signal, the 3rd control signal and the 4th control signal；The host computer is used to connect simultaneously The testing result of Water Test Kits is received, and show that the judgement of the Water Test Kits is reported according to testing result and national standard.
- 2. water quality online analyzer self-checking device according to claim 1, it is characterised in that：Set on the groove lid (12) It is equipped with star-like handle nut (121).
- 3. water quality online analyzer self-checking device according to claim 1, it is characterised in that：The groove lid (12) is with opening The place that mouth is in contact is provided with sealing ring.
- 4. water quality online analyzer self-checking device according to claim 1, it is characterised in that：The electromagnet fixed seat (71)On be provided with fixed block hole (711)；Discharging tube passes through fixed block hole (711) to be connected with apocenosis passage (113), described Peristaltic pump (6) is provided with discharging tube.
- 5. water quality online analyzer self-checking device according to claim 1, it is characterised in that：Described second to go out liquid unidirectional Valve (54) closing mouth goes out liquid check valve (54) port of export caliber r to the distance L that the second inlet tube exports less than 4 times second.
- 6. a kind of automatic calibrating method based on water quality online analyzer self-checking device described in claim 1, its feature exist In comprising the following steps：Step 1, testing staff connects the upper machine communication mouth of the PORT COM of detected Water Test Kits and calibrating installation, will The sampling system and detection liquid pipe (8) for being detected Water Test Kits are attached；Step 2, the standard mother liquid multi-cavity bottle equipped with standard liquid mother liquor is connected with the first feed tube (41)；By equipped with the dilute of dilution Liquid bottle is released to connect with the second feed tube (51)；Solution concentration after the concentration of standard liquid mother liquor and dilution is inputted to upper Machine；Step 3, host computer calculates according to the solution concentration after the concentration of standard liquid mother liquor and dilution and obtains standard liquid mother liquor Amount and dilution amount, and then draw the first syringe pump (4) amount of feed and the second syringe pump (5) amount of feed；Host computer according to First syringe pump (4) amount of feed sends the first control signal to the first control module A, according to the second syringe pump (5) amount of feed to Second control module B sends the second control signal, and host computer sends the 4th control signal to circuit control panel；Step 4, the first control module A controls the first syringe pump (4) to draw standard from standard mother liquid multi-cavity bottle according to the first control signal Solution mother liquor；Second control module B controls the second syringe pump (5) to draw dilution from dilution bottle according to the second control signal； Second control module B controls the second syringe pump (5) first to inject dilution to mixed solution pond (1) according to the second control signal, Then the first control module A controls the first syringe pump (4) by standard liquid mother liquor to mixed solution pond according to the first control signal (1) inject, and standard liquid mother liquor has at least injected when dilution injection is completed；Step 5, circuit control panel controls electromagnet (72) to be stirred driving to stirrer (73) according to the 4th control signal, enters And the liquid in mixed solution pond (1) is stirred；Step 6, after the completion of solution is prepared, computer sends sampling instruction to detected Water Test Kits, is detected water analysis Instrument carries out sampling work after receiving instruction to solution in mixed solution pond (1), is detected Water Test Kits and believes the analysis of water quality Breath is uploaded to host computer；Step 7, host computer carries out analysis detection according to the analysis information for being detected Water Test Kits to being detected Water Test Kits Automatic calibration.
- 7. automatic calibrating method according to claim 6, it is characterised in that：Host computer shows being detected Water Test Kits It is worth error, null offset, stability of display's analysis work.
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| 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 |
| CN108918443A (en) * | 2018-07-14 | 2018-11-30 | 浙江迪特西科技有限公司 | A kind of integrated portable water-quality COD detection device |
| CN108956256A (en) * | 2018-09-04 | 2018-12-07 | 南通市计量检定测试所（江苏省南通质量技术监督眼镜产品质量检验站、江苏省南通质量技术监督金银珠宝饰品产品质量检验站、江苏省大容量南通计量站、南通市大流量计量中心） | Based on the online water quality monitor self-checking device under vacuum ultra clean environment |
| CN108982890A (en) * | 2018-06-29 | 2018-12-11 | 西安思坦科技有限公司 | The automatic quality control system of water quality and function compounding method, data checking method |
| CN108982382A (en) * | 2018-07-17 | 2018-12-11 | 厦门市计量检定测试院 | A kind of calibration method of online total chromium analysis instrument |
| CN111366695A (en) * | 2020-03-24 | 2020-07-03 | 杭州绿洁环境科技股份有限公司 | Water quality monitoring's control system that marks |
| CN113295834A (en) * | 2021-05-21 | 2021-08-24 | 浙江方易校准检测技术有限公司 | Online calibrating device of heavy metal water quality online analyzer |
| CN115025701A (en) * | 2019-05-21 | 2022-09-09 | 迈克医疗电子有限公司 | Liquid preparation device and method with cleaning function and analyzer system |
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| CN115025701A (en) * | 2019-05-21 | 2022-09-09 | 迈克医疗电子有限公司 | Liquid preparation device and method with cleaning function and analyzer system |
| CN111366695A (en) * | 2020-03-24 | 2020-07-03 | 杭州绿洁环境科技股份有限公司 | Water quality monitoring's control system that marks |
| CN113295834A (en) * | 2021-05-21 | 2021-08-24 | 浙江方易校准检测技术有限公司 | Online calibrating device of heavy metal water quality online analyzer |
| CN113295834B (en) * | 2021-05-21 | 2023-04-25 | 浙江方易校准检测技术有限公司 | Online calibrating device of heavy metal water quality online analyzer |
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