CN104166408A - Fluid flow electrical conductivity adjusting method and system - Google Patents
Fluid flow electrical conductivity adjusting method and system Download PDFInfo
- Publication number
- CN104166408A CN104166408A CN201410385515.8A CN201410385515A CN104166408A CN 104166408 A CN104166408 A CN 104166408A CN 201410385515 A CN201410385515 A CN 201410385515A CN 104166408 A CN104166408 A CN 104166408A
- Authority
- CN
- China
- Prior art keywords
- conductivity
- pipeline
- unit
- sampling
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to a water and fertilizer control device with cross application of the electronic technology and the sensor technology, in particular to a fluid flow electrical conductivity adjusting method and system. According to the method and system, first, the electrical conductivity of a pipeline is set, the flow in the pipeline is sampled, an initial switching duty cycle of an intervention liquid convey-out unit is worked out according to the electrical conductivity value and the flow, the electrical conductivity in the current pipeline is sampled, the electrical conductivity in the pipeline is adjusted till the electrical conductivity meets an electrical conductivity adjustment deviation interval, and thus electrical conductivity adjustment of one cycle is completed. According to the fluid flow electrical conductivity adjusting method and system, the electronic technology serves as a basis, fluid electrical conductivity and flow velocity dynamic data are sampled in real time through the sensor technology, calculation is carried out through a control algorithm, an intervention liquid material ratio variable duty cycle pulse control signal required currently is obtained, and thus electrical conductivity adjustment of fluid is achieved.
Description
Technical field
The present invention relates to the liquid manure control device about electronic technology and sensor technology cross-application, particularly relate to the mobile conductivity method of adjustment of fluid and system.
Background technology
Conductivity is to weigh a total amount parameter of solution ion concentration.In general, contained acid, alkali, the salt of solution is more, and conductivity is just higher.The conductivity of aqueous solution, has represented the concentration of soluble-salt in solution.The measurement of conductivity is widely used in environmental monitoring, industrial flow control, medical and health, scientific research and product quality inspection process, and wherein environmental water quality monitoring, the evaluation of electronics industry water water quality are the example application of giving prominence to the most.In recent years, along with proposition and the development of agricultural modernization, in increasing agricultural production process, started the conductivity of agricultural water to detect and have higher requirement, and aspect real-time, accuracy, proposing higher standard.
Current, be mainly that this method is waste of manpower and material resources not only taking artificial on-site sampling, lab analysis as main to the measurement of conductivity, and also ageing also poor, more unfavorable and popularization.Though can substitute original sample analysis and pass through conductivity sensor Sampling techniques, but there is the drawback of certain deviation in the conductivity of existence under test fluid flow state, thereby restrict the application of automated detection method, aspect conductivity adjustment, cannot provide the conductivity of effective method convection cell to adjust in addition.
Summary of the invention
The object of the present invention is to provide one to utilize sensor technology real-time sampling fluid conductivity and flow velocity dynamic data, calculate by control algolithm, thereby obtain out when required intervention liquid material proportioning variable duty ratio pulse control signal, realize the mobile conductivity method of adjustment of fluid and system that convection cell conductivity is adjusted.
For achieving the above object, technical scheme of the present invention is: a kind of fluid conductivity method of adjustment that flows, comprise the steps,
Step S1: provide one to need the pipeline and of adjusting the mobile conductivity of fluid to be arranged at the intervention liquid output unit at this pipeline front end branch road place, and set the conductivity of described pipeline;
Step S2: after waiting for that pipeline is stable, the flow in pipeline is sampled;
Step S3: the flow of the pipeline of sampling in the conductivity of the pipeline of setting according to described step S1 and step S2, calculates the initial switch dutycycle of intervening liquid output unit in the unit interval:
To＝(Ks?*?Qc)?/?T
Wherein, To intervenes in unit interval T the time that liquid output unit switch is opened, and Ks is the value of setting conductivity, and Qc is the flow velocity in the unit interval, and T is the unit interval;
Step S4: the conductivity of sampling in current pipeline:
Kc＝(Ic－Imin)*Kr?/?(Imax－Imin)
Ka＝(Kc1＋Kc2＋…＋Kcn)?/?(T?/?Ti)
Wherein, Kc is current sampling conductivity, Ic is the electric current currency of measuring, Imin is the current minimum of measuring, Imax is the current maxima of measuring, and Kr is the range of measuring the conductivity measurement device that in pipeline, conductivity adopts, and Ka is the conductivity mean value in the unit interval, Kc1, Kc2 ..., Kcn is intermittent conductivity sampled data in unit interval T, Ti is the interval time of every 2 conductivity sampling;
Step S5: judge whether the conductivity in current pipeline departs from setting value, if Ka > is 2Ks, think conductivity anomaly in pipeline, alarm, execute exception is processed or manual intervention; Otherwise, execution step S6;
Step S6: judge whether the flow in current pipeline changes:
If Qc-Ql meets: Δ Qmin > Qc-Ql > Δ Qmax, performs step S7; Otherwise, jump to step S3, recalculate the initial switch dutycycle of intervening liquid output unit in the unit interval;
Wherein, Δ Qmin is-50L; Qc is the sampling flow of current unit interval; Ql was the sampling flow of a upper unit interval; Δ Qmax is 50L;
Step S7: judge in current pipeline, whether conductivity needs fine setting:
If │ Kc-Ks │ meets: Δ Kmin > │ Kc-Ks │ > Δ Kmax, re-executes step S4 ~ S7; If │ Kc-Ks │ does not meet for continuous 3 times: Δ Kmin > │ Kc-Ks │ > Δ Kmax, jump to step S8, the conductivity in pipeline is finely tuned;
Wherein, Δ Kmin is minimum conductivity deviation; Δ Kmax is high conductivity deviation;
Step S8: adjust the duty cycle of switching of intervening liquid output unit:
Tt＝To±Tp；
As Δ Kmin=0 μ S/m, when Δ Kmax=200 μ S/m, Tp=0s;
As Δ Kmin=200 μ S/m, when Δ Kmax=400 μ S/m, Tp=2s;
As Δ Kmin=400 μ S/m, when Δ Kmax=2 Ks, Tp=4s;
Wherein, Tt intervenes liquid output unit to open the solenoid valve time in the unit interval, and Tp intervenes the liquid output unit solenoid valve fine setting time in the unit interval;
Step S9: intervene the switch of liquid output unit according to the duty cycle of switching control of the intervention liquid output unit of step S8, to adjust the conductivity in pipeline; Thus, completed the conductivity adjustment of one-period, repeated execution of steps S4 ~ S9.
In embodiments of the present invention, described unit interval T is 20s.
In embodiments of the present invention, in described step S2, be to adopt ultrasonic flow meter to carry out traffic sampling to the traffic sampling in pipeline.
In embodiments of the present invention, in described step S4, described conductivity measurement device is that employing range is 20000 μ S/m, is output as the conductivity sensor of 4 ~ 20mA current signal, i.e. Imin=4mA, Imax=20mA, Kr=20000 μ S/m.
The present invention also provides a kind of fluid conductivity adjustment System that flows, and comprises
One needs to adjust the pipeline of the mobile conductivity of fluid;
One data sampling module, this data sampling module comprises for the pipeline flow sampling unit of sample lines fluid flow with for the conductivity sampling unit of sample lines fluid conductivity;
One conductivity adjusting module, conductivity setpoint unit, signal output unit and display unit that this conductivity adjusting module comprises Main Control Unit and is connected with this Main Control Unit; Described Main Control Unit is also connected to respectively described conductivity sampling unit and pipeline flow sampling unit;
One controls execution module, comprise be installed on described pipeline front end branch road place intervention liquid output unit, be arranged at the solenoid valve of described intervention liquid output unit delivery outlet, be arranged at described intervention liquid output unit delivery outlet and intervene the suspended body flowmeter of flow quantity for Site Detection; The control signal input end of described solenoid valve is connected to the output terminal of described signal output unit.
In embodiments of the present invention, described pipeline flow sampling unit comprises the flow measuring device that is arranged at described pipeline front end fluid inlet place and the traffic sampling data signal line that is connected to described Main Control Unit; Described conductivity sampling unit comprises the conductivity measurement device that is arranged at described pipeline end fluid outlet and the conductivity sampled data signal line that is connected to described Main Control Unit.
In embodiments of the present invention, described flow measuring device adopts ultrasonic flow meter.
In embodiments of the present invention, it is 20000 μ S/m that described conductivity measurement device adopts range, is output as the conductivity sensor of 4 ~ 20mA current signal.
Compared to prior art, the present invention has following beneficial effect: the present invention is taking electronic technology as support, utilize sensor technology real-time sampling fluid conductivity and flow velocity dynamic data, calculate by control algolithm, thereby obtain out when required intervention liquid material proportioning variable duty ratio pulse control signal, realize the adjustment of convection cell conductivity.
Brief description of the drawings
Fig. 1 is the mobile conductivity adjustment System structural drawing of fluid in the embodiment of the present invention.
Fig. 2 is pipeline and each module location drawing in pipeline in the embodiment of the present invention.
Fig. 3 is conductivity adjusting module design frame chart in the embodiment of the present invention.
Fig. 4 is conductivity adjusting module circuit diagram one in the embodiment of the present invention.
Fig. 5 is conductivity adjusting module circuit diagram two in the embodiment of the present invention.
Fig. 6 is conductivity adjusting module circuit diagram three in the embodiment of the present invention.
Fig. 7 is that in the embodiment of the present invention, conductivity is adjusted process flow diagram.
Fig. 8 is control signal dutycycle schematic diagram in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
The mobile conductivity method of adjustment of a kind of fluid of the present invention, comprises the steps,
Step S1: provide one to need the pipeline and of adjusting the mobile conductivity of fluid to be arranged at the intervention liquid output unit at this pipeline front end branch road place, and set the conductivity of described pipeline;
Step S2: wait for pipeline stable after, to the flow in pipeline sample (in the embodiment of the present invention, to the traffic sampling in pipeline be adopt ultrasonic flow meter carry out traffic sampling);
Step S3: the flow of the pipeline of sampling in the conductivity of the pipeline of setting according to described step S1 and step S2, calculates the initial switch dutycycle of intervening liquid output unit in the unit interval:
To＝(Ks?*?Qc)?/?T
Wherein, To intervenes in unit interval T the time that liquid output unit switch is opened, and Ks is the value of setting conductivity, and Qc is the flow velocity in the unit interval, and T is unit interval (getting 20s in the embodiment of the present invention);
Step S4: the conductivity of sampling in current pipeline:
Kc＝(Ic－Imin)*Kr?/?(Imax－Imin)
Ka＝(Kc1＋Kc2＋…＋Kcn)?/?(T?/?Ti)
Wherein, Kc is current sampling conductivity, and Ic is the electric current currency of measuring; Imin is the current minimum of measuring, Imax is the current maxima of measuring, Kr is the range (in the embodiment of the present invention of measuring the conductivity measurement device that conductivity adopts in pipeline, described conductivity measurement device is that employing range is 20000 μ S/m, be output as the conductivity sensor of 4 ~ 20mA current signal, be Imin=4mA, Imax=20mA, Kr=20000 μ S/m), Ka is the conductivity mean value in the unit interval, Kc1, Kc2 ..., Kcn is intermittent conductivity sampled data in unit interval T, Ti is the interval time of every 2 conductivity sampling;
Step S5: judge whether the conductivity in current pipeline departs from setting value, if Ka > is 2Ks, think conductivity anomaly in pipeline, alarm, execute exception is processed or manual intervention; Otherwise, execution step S6;
Step S6: judge whether the flow in current pipeline changes:
If Qc-Ql meets: Δ Qmin > Qc-Ql > Δ Qmax, performs step S7; Otherwise, jump to step S3, recalculate the initial switch dutycycle of intervening liquid output unit in the unit interval;
Wherein, Δ Qmin is-50L; Qc is the sampling flow of current unit interval; Ql was the sampling flow of a upper unit interval; Δ Qmax is 50L;
Step S7: judge in current pipeline, whether conductivity needs fine setting:
If │ Kc-Ks │ meets: Δ Kmin > │ Kc-Ks │ > Δ Kmax, re-executes step S4 ~ S7; If │ Kc-Ks │ does not meet for continuous 3 times: Δ Kmin > │ Kc-Ks │ > Δ Kmax, jump to step S8, the conductivity in pipeline is finely tuned;
Wherein, Δ Kmin is minimum conductivity deviation; Δ Kmax is high conductivity deviation;
Step S8: adjust the duty cycle of switching of intervening liquid output unit:
Tt＝To±Tp；
As Δ Kmin=0 μ S/m, when Δ Kmax=200 μ S/m, Tp=0s;
As Δ Kmin=200 μ S/m, when Δ Kmax=400 μ S/m, Tp=2s;
As Δ Kmin=400 μ S/m, when Δ Kmax=2 Ks, Tp=4s;
Wherein, Tt intervenes liquid output unit to open the solenoid valve time in the unit interval, and Tp intervenes the liquid output unit solenoid valve fine setting time in the unit interval;
Step S9: intervene the switch of liquid output unit according to the duty cycle of switching control of the intervention liquid output unit of step S8, to adjust the conductivity in pipeline; Thus, completed the conductivity adjustment of one-period, repeated execution of steps S4 ~ S9.
The present invention also provides a kind of fluid conductivity adjustment System that flows, and comprises that one needs to adjust the flow pipeline of conductivity of fluid;
One data sampling module, this data sampling module comprises for the pipeline flow sampling unit of sample lines fluid flow with for the conductivity sampling unit of sample lines fluid conductivity; Described pipeline flow sampling unit comprises the flow measuring device (in the embodiment of the present invention, described flow measuring device adopts ultrasonic flow meter) that is arranged at described pipeline front end fluid inlet place and the traffic sampling data signal line that is connected to described Main Control Unit; Described conductivity sampling unit comprises that the conductivity measurement device that is arranged at described pipeline end fluid outlet is (in the embodiment of the present invention, it is 20000 μ S/m that described conductivity measurement device adopts range, is output as the conductivity sensor of 4 ~ 20mA current signal) and be connected to the conductivity sampled data signal line of described Main Control Unit;
One conductivity adjusting module, conductivity setpoint unit, signal output unit and display unit that this conductivity adjusting module comprises Main Control Unit and is connected with this Main Control Unit; Described Main Control Unit is also connected to respectively described conductivity sampling unit and pipeline flow sampling unit;
One controls execution module, comprise be installed on described pipeline front end branch road place intervention liquid output unit, be arranged at the solenoid valve of described intervention liquid output unit delivery outlet, be arranged at described intervention liquid output unit delivery outlet the suspended body flowmeter for Site Detection intervention flow quantity, this suspended body flowmeter range is 1t/h; The control signal input end of described solenoid valve is connected to the output terminal of described signal output unit.
Be below specific embodiments of the invention.
As shown in Figure 1, the fluid of the embodiment of the present invention conductivity adjustment System that flows, comprises pipeline, data sampling module, conductivity adjusting module and controls execution module.
As shown in Figure 2, in the embodiment of the present invention, pipeline and each module location drawing in pipeline; Wherein, C1, P1 have formed main line; P2 measures branch road pipeline; C2, P3 have formed intervention liquid pipeline; M is conductivity adjusting module control box; S1, S2 are conductivity sampling units; Q1 is traffic sampling unit; D1, D2 are impulse electromagnetic valves; F1, F2 are suspended body flowmeters; B1, B2 are respectively the suction pump on main line and bye-pass; W1, W2 are Venturi tube; G is the sprinkling irrigation in greenhouse.
Data sampling module comprises conductivity sampling unit and pipeline flow sampling unit; As shown in Figure 3, conductivity adjusting module comprises conductivity setpoint unit, Main Control Unit, signal output unit and display unit; Control execution module comprises intervention liquid output unit and (in this intervention liquid output unit, intervention liquid is installed, wherein, intervening liquid is a kind of liquid that can change conductivity in original pipeline, what in the embodiment of the present invention, adopt is high solubility water soluble fertilizer stoste as intervening liquid, for improving the conductivity of irrigation water), solenoid valve and suspended body flowmeter.
Described pipeline flow sampling unit comprises flow measuring device and traffic sampling data signal line, and described flow measuring device is connected to pipeline front end fluid inlet position; Described conductivity sampling unit comprises conductivity measurement device and conductivity sampled data signal line, and described conductivity measurement device is connected to pipeline end fluid egress point position;
As shown in Figure 4, described traffic sampling data signal line is connected with described Main Control Unit FLOW pin, described conductivity sampled data signal line is connected with described Main Control Unit EC pin, and described Main Control Unit CTRL_1 and CTRL_2 access described signal output unit;
As shown in Figure 5, the control signal input end of the output terminal of described signal output unit and described solenoid valve controller is connected; Described display unit LCD_RS, LCD_DB0 ~ 7, LCD_RST, LCD_CS, LCD_SDATA, LCD_SCLK are connected with described Main Control Unit PE7 ~ 15, PEC0 ~ 3 respectively, composition system input device;
As shown in Figure 6, described conductivity setpoint unit B UTTON_UP, BUTTON_RIGHT, BUTTON_SEL, BUTTON_LEFT, BUTTON_DOWN are connected with described Main Control Unit PE2 ~ PE6 respectively, composition system output device;
Described intervention liquid output unit (this intervention liquid output unit is provided with and intervenes liquid) is arranged on described pipeline front end branch road position, is connected with described suspended body flowmeter afterwards, and access pipeline main pipeline after suspended body flowmeter is connected with impulse electromagnetic valve again;
As shown in Figure 7, the mobile conductivity method of adjustment course of work of the fluid in the present embodiment is as follows:
S1: the setting of conductivity in described conductivity setpoint unit carries out current pipeline;
S2: avoid detecting and bringing uncertain disturbing factor because initial pipeline moves to system, the method for employing time delay starts the flow in pipeline to sample, and is counted as data on flows by described Main Control Unit transfer after waiting for that pipeline is stable;
Q＝C；
Wherein: the flow in the Q representation unit time; C is the pulse number in the unit interval, and each pulse represents 1L;
What the sampling unit of pipeline flow described in the present embodiment adopted is the ultrasonic flow meter that is output as pulse signal, and in conjunction with the mounting means of external clamping, reduces the generation of air pocket.
S3: calculate the initial switch dutycycle of intervening liquid output unit in the unit interval according to the piping flow data of sampling in the conductivity of setting in described conductivity setpoint unit and described data sampling module;
To＝(Ks?*?Qc)?/?T；
Wherein: To intervenes the time that liquid output unit switch is opened in unit interval T; Ks is the value of setting electrical materials and appliances rate; Qc is the flow velocity in the unit interval; T is unit interval (20 seconds);
As shown in Figure 8,10% dutycycle, 30% dutycycle and 80% dutycycle waveform sequential chart under unit interval T in the embodiment of the present invention.
S4: start the conductivity data in sampling conduit.
Kc＝(Ic－Imin)*Kr?/?(Imax－Imin)；
Ka＝(Kc1＋Kc2＋…＋Kcn)?/?(T?/?Ti)；
Wherein: Kc is current sampling conductivity, Ic is the electric current currency of measuring; Imin is the current minimum of measuring, and Imax is the current maxima of measuring; Kr is the range of conductivity sensor; Ka is the conductivity mean value in the unit interval; Kc1, Kc2 ..., Kcn is intermittent conductivity sampled data in unit interval T, Ti is the interval time of every 2 conductivity sampling;
What the sampling unit of conductivity described in the embodiment of the present invention adopted is that range is 20000 μ S/m, is output as the conductivity sensor of 4 ~ 20mA current signal, i.e. Imin=4mA, Imax=20mA, Kr=20000 μ S/m;
S5: judge whether substantial deviation setting value of ducted conductivity: in the time of Ka > 2Ks, be identified as the conductivity anomaly in pipeline, need to jump to S10 and carry out abnormality processing, otherwise carry out next step;
S6: judge whether ducted flow changes:
ΔQmin＞Qc－Ql＞ΔQmax；
Wherein: Δ Qmin is-50L; Qc is the sampling flow of current unit interval; Ql was the sampling flow of a upper unit interval; Δ Qmin is 50L;
If ducted difference in flow just need to recalculate and calculate the initial switch dutycycle of intervening liquid output unit in the unit interval lower than Δ Qmin or higher than Δ Qmax, jump to S3;
S7: judge whether ducted conductivity needs fine setting:
ΔKmin＞│Kc－Ks│＞ΔKmax；
Wherein: Δ Kmin is minimum conductivity deviation; Kc is the conductivity of current sampling; Ks is the value of setting electrical materials and appliances rate; Δ Kmax is high conductivity deviation;
Δ Kmin and Δ Kmax have formed one group and have adjusted between deviation area, if continuous 3 deviations just need to jump to S8 beyond all dropping between adjustment deviation area, the conductivity in pipeline are finely tuned, otherwise repeat S4 ~ S7;
S8: adjust the duty cycle of switching of intervening liquid output unit:
Tt＝To±Tp；
1.: as Δ Kmin=0 μ S/m, when Δ Kmax=200 μ S/m, Tp=0s;
2.: as Δ Kmin=200 μ S/m, when Δ Kmax=400 μ S/m, Tp=2s;
3.: as Δ Kmin=400 μ S/m, when Δ Kmax=2 Ks, Tp=4s;
Wherein, Tt intervenes liquid output unit to open the solenoid valve time in the unit interval, and Tp intervenes the liquid output unit solenoid valve fine setting time in the unit interval;
S9: control execution module and open or close solenoid valve according to the duty cycle of switching of the intervention liquid output unit of step S8, the conductivity in pipeline is adjusted, an adjustment cycle so far finishes, and repeats S4 ~ S9 step.
S10: the processing (alarm, execute exception is processed or manual intervention) to abnormal conditions.
Need special instruction: described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Claims (8)
1. the mobile conductivity method of adjustment of fluid, is characterized in that: comprises the steps,
Step S1: provide one to need the pipeline and of adjusting the mobile conductivity of fluid to be arranged at the intervention liquid output unit at this pipeline front end branch road place, and set the conductivity of described pipeline;
Step S2: after waiting for that pipeline is stable, the flow in pipeline is sampled;
Step S3: the flow of the pipeline of sampling in the conductivity of the pipeline of setting according to described step S1 and step S2, calculates the initial switch dutycycle of intervening liquid output unit in the unit interval:
To＝(Ks?*?Qc)?/?T
Wherein, To intervenes in unit interval T the time that liquid output unit switch is opened, and Ks is the value of setting conductivity, and Qc is the flow velocity in the unit interval, and T is the unit interval;
Step S4: the conductivity of sampling in current pipeline:
Kc＝(Ic－Imin)*Kr?/?(Imax－Imin)
Ka＝(Kc1＋Kc2＋…＋Kcn)?/?(T?/?Ti)
Wherein, Kc is current sampling conductivity, Ic is the electric current currency of measuring, Imin is the current minimum of measuring, Imax is the current maxima of measuring, and Kr is the range of measuring the conductivity measurement device that in pipeline, conductivity adopts, and Ka is the conductivity mean value in the unit interval, Kc1, Kc2 ..., Kcn is intermittent conductivity sampled data in unit interval T, Ti is the interval time of every 2 conductivity sampling;
Step S5: judge whether the conductivity in current pipeline departs from setting value, if Ka > is 2Ks, think conductivity anomaly in pipeline, alarm, execute exception is processed or manual intervention; Otherwise, execution step S6;
Step S6: judge whether the flow in current pipeline changes:
If Qc-Ql meets: Δ Qmin > Qc-Ql > Δ Qmax, performs step S7; Otherwise, jump to step S3, recalculate the initial switch dutycycle of intervening liquid output unit in the unit interval;
Wherein, Δ Qmin is-50L; Qc is the sampling flow of current unit interval; Ql was the sampling flow of a upper unit interval; Δ Qmax is 50L;
Step S7: judge in current pipeline, whether conductivity needs fine setting:
If │ Kc-Ks │ meets: Δ Kmin > │ Kc-Ks │ > Δ Kmax, re-executes step S4 ~ S7; If │ Kc-Ks │ does not meet for continuous 3 times: Δ Kmin > │ Kc-Ks │ > Δ Kmax, jump to step S8, the conductivity in pipeline is finely tuned;
Wherein, Δ Kmin is minimum conductivity deviation; Δ Kmax is high conductivity deviation;
Step S8: adjust the duty cycle of switching of intervening liquid output unit:
Tt＝To±Tp；
As Δ Kmin=0 μ S/m, when Δ Kmax=200 μ S/m, Tp=0s;
As Δ Kmin=200 μ S/m, when Δ Kmax=400 μ S/m, Tp=2s;
As Δ Kmin=400 μ S/m, when Δ Kmax=2 Ks, Tp=4s;
Wherein, Tt intervenes liquid output unit to open the solenoid valve time in the unit interval, and Tp intervenes the liquid output unit solenoid valve fine setting time in the unit interval;
Step S9: intervene the switch of liquid output unit according to the duty cycle of switching control of the intervention liquid output unit of step S8, to adjust the conductivity in pipeline; Thus, completed the conductivity adjustment of one-period, repeated execution of steps S4 ~ S9.
2. the mobile conductivity method of adjustment of fluid according to claim 1, is characterized in that: described unit interval T is 20s.
3. the mobile conductivity method of adjustment of fluid according to claim 1, is characterized in that: in described step S2, be to adopt ultrasonic flow meter to carry out traffic sampling to the traffic sampling in pipeline.
4. the mobile conductivity method of adjustment of fluid according to claim 1, it is characterized in that: in described step S4, described conductivity measurement device is that employing range is 20000 μ S/m, be output as the conductivity sensor of 4 ~ 20mA current signal, be Imin=4mA, Imax=20mA, Kr=20000 μ S/m.
5. the mobile conductivity adjustment System of fluid, is characterized in that: comprise
One needs to adjust the pipeline of the mobile conductivity of fluid;
One data sampling module, this data sampling module comprises for the pipeline flow sampling unit of sample lines fluid flow with for the conductivity sampling unit of sample lines fluid conductivity;
One conductivity adjusting module, conductivity setpoint unit, signal output unit and display unit that this conductivity adjusting module comprises Main Control Unit and is connected with this Main Control Unit; Described Main Control Unit is also connected to respectively described conductivity sampling unit and pipeline flow sampling unit;
One controls execution module, comprise be installed on described pipeline front end branch road place intervention liquid output unit, be arranged at the solenoid valve of described intervention liquid output unit delivery outlet, be arranged at described intervention liquid output unit delivery outlet and intervene the suspended body flowmeter of flow quantity for Site Detection; The control signal input end of described solenoid valve is connected to the output terminal of described signal output unit.
6. the mobile conductivity adjustment System of fluid according to claim 5, is characterized in that: described pipeline flow sampling unit comprises the flow measuring device that is arranged at described pipeline front end fluid inlet place and the traffic sampling data signal line that is connected to described Main Control Unit; Described conductivity sampling unit comprises the conductivity measurement device that is arranged at described pipeline end fluid outlet and the conductivity sampled data signal line that is connected to described Main Control Unit.
7. the mobile conductivity adjustment System of fluid according to claim 6, is characterized in that: described flow measuring device adopts ultrasonic flow meter.
8. the mobile conductivity adjustment System of fluid according to claim 6, is characterized in that: it is 20000 μ S/m that described conductivity measurement device adopts range, is output as the conductivity sensor of 4 ~ 20mA current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385515.8A CN104166408B (en) | 2014-08-07 | 2014-08-07 | Fluid flow electrical conductivity adjusting method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410385515.8A CN104166408B (en) | 2014-08-07 | 2014-08-07 | Fluid flow electrical conductivity adjusting method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104166408A true CN104166408A (en) | 2014-11-26 |
| CN104166408B CN104166408B (en) | 2017-01-25 |
Family
ID=51910269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410385515.8A Expired - Fee Related CN104166408B (en) | 2014-08-07 | 2014-08-07 | Fluid flow electrical conductivity adjusting method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104166408B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583590A (en) * | 2004-05-27 | 2005-02-23 | 上海交通大学 | Electromagnetic water treater with monitoring water quality conductivity |
| US20060130897A1 (en) * | 2004-12-22 | 2006-06-22 | Georgeson Gary E | Adhesive mix monitor |
| CN101095048A (en) * | 2004-12-30 | 2007-12-26 | 3M创新有限公司 | Conductivity measurement and monitoring system for a fluid treatment system |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
| CN102116756A (en) * | 2009-12-30 | 2011-07-06 | 上海城投原水有限公司 | Single chip microcomputer-based liquid electrical conductivity measurement method |
| CN103499984A (en) * | 2013-09-26 | 2014-01-08 | 北京农业智能装备技术研究中心 | Nutrient solution ion concentration control method and system |
-
2014
- 2014-08-07 CN CN201410385515.8A patent/CN104166408B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583590A (en) * | 2004-05-27 | 2005-02-23 | 上海交通大学 | Electromagnetic water treater with monitoring water quality conductivity |
| US20060130897A1 (en) * | 2004-12-22 | 2006-06-22 | Georgeson Gary E | Adhesive mix monitor |
| CN101095048A (en) * | 2004-12-30 | 2007-12-26 | 3M创新有限公司 | Conductivity measurement and monitoring system for a fluid treatment system |
| CN102116756A (en) * | 2009-12-30 | 2011-07-06 | 上海城投原水有限公司 | Single chip microcomputer-based liquid electrical conductivity measurement method |
| CN101893465A (en) * | 2010-06-30 | 2010-11-24 | 合肥工业大学 | DSP-based electromagnetic flowmeter signal processing system |
| CN103499984A (en) * | 2013-09-26 | 2014-01-08 | 北京农业智能装备技术研究中心 | Nutrient solution ion concentration control method and system |
Non-Patent Citations (2)
| Title |
|---|
| 仵杰 等: "流体电导率的测量原理研究", 《计量与测试技术》 * |
| 李慧颖 等: "基于无线传感器网络的温室栽培营养液电导率监控系统", 《农业工程学报》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104166408B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104677969B (en) | Electroplate liquid on-line detecting system and detection method | |
| CN102163043A (en) | Automatic precise controller for water fertilizer | |
| CN101294841B (en) | Automatic detecting device and method for measuring tank | |
| CN104321634A (en) | Particle dispensing apparatus and method | |
| CN101493471B (en) | Water sample on-line monitoring and overproof sample holding apparatus and operation method thereof | |
| CN103267795B (en) | On-line monitoring analyzer for fluorinion in water and detection method thereof | |
| CN204151270U (en) | A kind of industrial preparation scale protein separation system | |
| CN207051141U (en) | The multi-functional on-line analysis system of wet desulphurization slurry | |
| CN103472204A (en) | Method for detecting ash content of floatation products | |
| CN208224234U (en) | A kind of water pollution source on-line monitoring device | |
| CN205067137U (en) | Automatic sampling device of water sample | |
| CN104237319A (en) | PH value online analysis device suitable for industrial production and application of device | |
| CN206540595U (en) | A kind of online small-bore fluid flowmeter calibration system | |
| CN204831954U (en) | Nonmetal pulp density detection device of environment -friendly | |
| CN104166408B (en) | Fluid flow electrical conductivity adjusting method and system | |
| CN201945339U (en) | Gas-liquid two-phase flow online monitoring and metering device | |
| CN205382057U (en) | Sewage treatment plant intelligent monitoring device | |
| CN203140214U (en) | Automatic quantitative spraying detector | |
| CN204177758U (en) | One is applicable to industrial pH value on-line analysis device | |
| CN204746112U (en) | Reverse osmosis system salt rejection on -line monitoring device | |
| CN203772750U (en) | Online monitor for detecting concentration of aniline in water | |
| CN203976395U (en) | Technical hydrochloric acid production equipment | |
| CN203720167U (en) | Intelligent water quality analyzer | |
| CN206069489U (en) | Sewage disposal neutralization pond automatic alkali adding device | |
| CN202275034U (en) | Concentration detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160422 Address after: Universal Plaza No. 158 Gulou District of Fuzhou city in Fujian province 350000 54 Road 15 layer 04 unit 01 room Applicant after: Fujian Chong Yu Mdt InfoTech Ltd Address before: 350001 Fujian province Fuzhou City Road 147, 54 star Pearl Shun 503 Applicant before: FUJIAN HORIZON INFORMATION TECHNOLOGY CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20170807 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |