CN105424779B - Nutrient solution ion concentration on-line measuring device and ion-selective electrode scaling method - Google Patents
Nutrient solution ion concentration on-line measuring device and ion-selective electrode scaling method Download PDFInfo
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- CN105424779B CN105424779B CN201510906663.4A CN201510906663A CN105424779B CN 105424779 B CN105424779 B CN 105424779B CN 201510906663 A CN201510906663 A CN 201510906663A CN 105424779 B CN105424779 B CN 105424779B
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Abstract
Present invention relates particularly to a kind of nutrient solution ion concentration on-line measuring device and the method and apparatus demarcated using the device to ion-selective electrode, wherein nutrient solution ion concentration on-line measuring device is connected by motion controller with multiple motors, it realizes the ion-selective electrode on the electrode fixuture and inserts or pull out any one solution pool to be measured or any one standard solution pond, and acquire the voltage value of ion-selective electrode output by voltage collector；Linear fit is carried out by the logarithm to the solution concentration in the voltage value and each standard solution pond collected, obtains the linear relationship between the voltage value and solution concentration logarithm corresponding to the ion-selective electrode.The technical solution provided according to the present invention, both the automation calibration to ion-selective electrode can have been realized, the on-line checking that can realize solution ion concentration to be measured again is particularly suitable for the on-line checking of the automation calibration and ion concentration to the ion-selective electrode of soilless culture nutrient fluid.
Description
Technical field
The present invention relates to ion concentration on-line checking fields, and in particular to a kind of nutrient solution ion concentration on-line measuring device
And the method and apparatus that ion-selective electrode is demarcated using the device.
Background technique
Currently, carrying out commercialization vegetables production using nutrient solution as cultivation medium has gradually developed into one from research and probe
The practical production technology of kind.In view of this mode water-saving fertilizer-saving, high yield is cleaned, area expands rapidly, and a variety of cultivation modes are (deep
Liquid stream cultivation, nutrition liquid film cultivation, steam fog training, Soilless culture, combined type cultivation technique ...) in succession by domestic and international researcher
It developed, the cultivation management technology gradual perfection to match.
Under the conditions of nutrient fluid cultivation, the root system of crop is immersed in nutrient solution, and required moisture, nutrient are mentioned by nutrient solution
For.Since nutrient solution buffer capacity is much weaker than soil, the variation of component characteristic can produce a very large impact plant growth.Mesh
Preceding nutrient solution used is made of nitrogen, phosphorus, potassium, calcium, magnesium, the big element of sulphur six, and for most crops, to nitrogen, phosphorus, potassium
Demand commonly greater than the demand to calcium, magnesium, sulphur, this inevitably results in nutrient solution prescription and out-of-balance conditions occurs, if too late
When adjust, the upgrowth situation of crop also will receive influence.Therefore, how nutrient solution is managed, it is unbalance avoids the occurrence of component
It is one of key component in water culture technique management.
The dynamic changing process for obtaining nutrient solution Main Nutrients ion is the premise for regulating and controlling nutrient solution prescription.Application at present is most
It is widely to be detected using ion-selective electrode to the corresponding nutrient ion concentration of nutrient solution.Although this method is easy to operate,
Its precision also can satisfy the requirement of nutrient management, but in use, need to change effects of ion concentration signal
It is exported for electric signal, so potential drifting directly affects the accuracy of institute's measured ion concentration.Therefore it needs to ion-selective electrode
It is frequently demarcated, to eliminate influence of the potential drifting to detection accuracy.Mostly use artificial calibration means now, heavy workload,
It is time-consuming and laborious.
Further, since ion-selective electrode needs continually to carry out in use artificially to demarcate by hand, and from
The use of son selection electrode is generally implementing scene, such as in soilless cultivation greenhouse, and logical to the calibration of ion-selective electrode
It often all carries out under lab, such user needs frequently to travel to and fro between implementation scene and laboratory, has seriously affected ion concentration
Detection efficiency, constrain the realization of ion concentration on-line checking.
Summary of the invention
The technical problem to be solved by the present invention is to solve ion-selective electrode using preceding needing manually to be demarcated and band
The heavy workload come, the problem of can not achieve nutrient solution ion concentration on-line checking.
In view of the above-mentioned problems, the invention proposes a kind of ion concentration on-line measuring device, including horizontal guide rail, horizontal silk
Thick stick, the first sliding block, vertical guide rail, down-feed screw, the second sliding block, at least one solution pool to be measured, at least two standard solution ponds,
Electrode fixuture, voltage collector, first motor, the second motor, motion controller and electrode clean mechanism；Wherein,
At least one described solution pool to be measured and at least two standard solution pond are arranged at the horizontal guide rail
Side, and arranged along the horizontal guide rail；
The horizontal guide rail is for fixing the horizontal lead screw, and the vertical guide rail is for fixing the down-feed screw；
The down-feed screw is fixed on the horizontal lead screw by first sliding block, the horizontal lead screw and described the
One motor is connected；
The electrode fixuture is fixed on the down-feed screw by second sliding block, the down-feed screw with it is described
Second motor is connected；
The motion controller is connected with the first motor and second motor, moves for controlling the vertical guide rail
It moves at the position of any one of solution pool to be measured or position in any one of standard solution pond, and for controlling
Make the electrode fixuture ion-selective electrode being arranged on the electrode fixuture is inserted or pull out it is any one of
Solution pool to be measured or any one of standard solution pond；
The voltage collector is defeated to acquire ion-selective electrode for being connected with the voltage output end of ion-selective electrode
Voltage value out；
The electrode clean mechanism is used to clean ion-selective electrode, and it is quick to be attached to ion-selective electrode with removing
Feel the ion of film surface.
Preferably,
The solution pool to be measured is provided with liquid supply pipe, for importing solution to be measured in the solution pool to be measured；
The solution pool to be measured is provided with return pipe, and the solution to be measured for will test ion concentration exports described to be measured
Solution pool.
Preferably,
The service sink of the electrode clean mechanism is provided with water inlet pipe, for importing deionized water in the service sink；
The service sink of the electrode clean mechanism is provided with outlet pipe, for the export of used deionized water is described clear
Wash pool.
Preferably, described device further includes voltage amplifier, to preset amplification factor amplification ion-selective electrode output
Voltage signal.
A kind of ion concentration on-line measuring device, including it is horizontal guide rail, horizontal lead screw, the first sliding block, vertical guide rail, vertical
Screw rod, the second sliding block, third guide rail, third screw rod, third sliding block, at least one solution pool to be measured, at least two standard solution
Pond, electrode fixuture, voltage collector, first motor, the second motor, third motor, motion controller and electrode clean mechanism；
Wherein,
The horizontal guide rail is for fixing the horizontal lead screw, and the vertical guide rail is for fixing the down-feed screw, institute
Third guide rail is stated for fixing the third screw rod；
The down-feed screw is fixed on the horizontal lead screw by first sliding block, the horizontal lead screw and described the
One motor is connected；
The third screw rod is fixed on the down-feed screw by second sliding block, perpendicular to the horizontal lead screw and
The down-feed screw, the down-feed screw are connected with second motor；
The electrode fixuture is fixed on the third screw rod by the third sliding block, the third screw rod with it is described
Third motor is connected；
The motion controller is connected with the first motor, second motor and the third motor, for controlling
The vertical guide rail is moved at the position of any one of solution pool to be measured or any one of standard solution pond
At position, and the ion-selective electrode being arranged on the electrode fixuture is inserted into or is pulled out for controlling the electrode fixuture
Any one of solution pool to be measured or any one of standard solution pond out；
The voltage collector is defeated to acquire ion-selective electrode for being connected with the voltage output end of ion-selective electrode
Voltage value out；
The electrode clean mechanism is attached to ion-selective electrode for cleaning to ion-selective electrode, to remove
Solution on surface.
A method of ion-selective electrode is demarcated using above-mentioned ion concentration on-line measuring device, feature
It is, including：
Ion-selective electrode is set on the electrode fixuture according to predetermined order by motion controller control
It is sequentially inserted into each standard solution pond, standard is inserted into ion-selective electrode by the electrode clean mechanism each time
Ion-selective electrode is cleaned before solution pool, and ion-selective electrode is acquired in each institute by the voltage collector
The voltage value exported when stating in standard solution pond；
Linear Quasi is carried out to the logarithm of the solution concentration in the voltage value and each standard solution pond collected
It closes, to obtain corresponding to the linear relationship between the voltage value of the ion-selective electrode and the logarithm of solution concentration.
Preferably, it is described by the voltage collector acquire ion-selective electrode in each standard solution pond when
The voltage value of output, specifically includes：
The voltage signal exported when by default amplification factor amplification ion-selective electrode in each standard solution pond,
Obtain amplified voltage signal；
After the amplitude variation of the amplified voltage signal within a preset time is lower than preset value, pass through the voltage
Collector acquires amplified voltage value.
Preferably, the solution concentration in the described pair of voltage value collected and each standard solution pond carries out linear
Fitting is specifically included with obtaining the linear relationship between the voltage value and solution concentration corresponding to the ion-selective electrode：
Minimum two is used to the logarithm of the solution concentration in the voltage value and each standard solution pond collected
Multiplication carries out linear fit, to obtain corresponding to the line between the voltage value of the ion-selective electrode and the logarithm of solution concentration
Sexual intercourse.
A kind of equipment that ion-selective electrode is demarcated using above-mentioned ion concentration on-line measuring device, feature
It is, including：
The control module being respectively connected with the motion controller and the voltage collector, for being controlled by the movement
Ion-selective electrode is arranged on the electrode fixuture in device processed control, and according to predetermined order to be sequentially inserted into each standard molten
In liquid pool, electricity is selected to ion before ion-selective electrode is inserted into standard solution pond each time by the electrode clean mechanism
Pole is cleaned, and while acquiring ion-selective electrode in each standard solution pond by the voltage collector exports
Voltage；
The computing module for connecting the control module, voltage value and each mark for being obtained to the control module
The logarithm of solution concentration in quasi- solution pool carries out linear fit, with obtain the voltage value corresponding to the ion-selective electrode with
Linear relationship between the logarithm of solution concentration.
Preferably, the equipment further includes：
Human-computer interaction module is started to work for receiving the triggering command of user with controlling the control module；
It is also used to receive the solution concentration value in the standard solution pond of user's input, and exports to the computing module；
It is also used to receive the voltage value of the ion-selective electrode of the computing module output and the logarithm of solution concentration
Linear relationship between value.
A kind of nutrient solution ion concentration on-line measuring device provided by the invention and using the device to ion-selective electrode
The method and apparatus demarcated, wherein nutrient solution ion concentration on-line measuring device passes through motion controller and multiple motor phases
Even, it realizes the ion-selective electrode on the electrode fixuture and inserts or pull out any one solution pool to be measured or any one
A standard solution pond, and the voltage value that ion-selective electrode exports is acquired by voltage collector；Use the nutrient solution ion
Method that concentration on-line measuring device demarcates ion-selective electrode is based on Nernst equation, by collecting
The logarithm of solution concentration in voltage value and each standard solution pond carries out linear fit, has obtained corresponding to the ion
Select the linear relationship between the voltage value of electrode and the logarithm of solution concentration.The technical solution provided according to the present invention, both
The automation to ion-selective electrode can be achieved to demarcate, and can realize the on-line checking of nutrient solution ion concentration to be measured.
Detailed description of the invention
Fig. 1 is a kind of nutrient solution ion concentration on-line measuring device schematic block diagram that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides a kind of nutrient solution ion concentration on-line measuring device schematic block diagram；
Fig. 3 be another embodiment of the present invention provides the method flow schematic diagram that ion-selective electrode is demarcated；
Fig. 4 be another embodiment of the present invention provides the equipment schematic block diagram that ion-selective electrode is demarcated；
Fig. 5 be another embodiment of the present invention provides a kind of nutrient solution ion concentration on-line measuring device structural schematic diagram；
Fig. 6 be another embodiment of the present invention provides Fig. 5 shown device controller internal structure schematic block diagram；
Fig. 7 be another embodiment of the present invention provides the solution ion concentration detected value obtained using Fig. 5 shown device with
Comparison diagram between true value.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 1 is a kind of schematic block diagram for nutrient solution ion concentration on-line measuring device 100 that one embodiment of the invention provides.
Referring to Fig. 1, which includes：
Horizontal guide rail 101, horizontal screw lead 114, the first sliding block 102, vertical guide rail 103, down-feed screw 115, the second sliding block
104, at least one solution pool 105 to be measured, at least two standard solution ponds 106, electrode fixuture 107, voltage collector 108,
First motor 109, the second motor 110, motion controller 112 and electrode clean mechanism 113；Wherein,
At least one described solution pool 105 to be measured and at least two standard solution pond 106 are arranged at the level
The side of guide rail 101, and arranged along the horizontal guide rail 101；
The horizontal guide rail 101 is for fixing the horizontal lead screw 114, and the vertical guide rail 103 is for fixing described hang down
Raw silk rings bar 115；
The down-feed screw 115 is fixed on the horizontal lead screw 114 by first sliding block 102, the horizontal silk
Bar 114 is connected with the first motor 109；
The electrode fixuture 107 is fixed on the down-feed screw 115 by second sliding block 104, described vertical
Screw rod 115 is connected with second motor 110；
The motion controller 112 is connected with the first motor 109 and second motor 110, described for controlling
Vertical guide rail 103 is moved at the position of any one of solution pool to be measured 105 or any one of standard solution pond
At 106 position, and the ion being arranged on the electrode fixuture 107 is selected for controlling the electrode fixuture 107
Electrode 111 inserts or pull out any one of solution pool to be measured 105 or any one of standard solution pond 106；
The voltage collector 108 with the voltage output end of ion-selective electrode 111 for being connected, to acquire ion selection
The voltage value that electrode 111 exports；
The electrode clean mechanism 113 is attached to ion selection for cleaning to ion-selective electrode 111, to remove
The ion of the sensitive film surface of electrode 111.
It should be noted that the electrode clean mechanism 113 in the present embodiment can be service sink, it is arranged in solution pool to be measured
105 and standard solution pond 106 it is ipsilateral, when ion-selective electrode is from any solution pool 105 to be measured or any standard solution pool 106
After middle extraction, under the control of motion controller, into being cleaned in service sink.
Electrode clean mechanism 113 in the present embodiment or the automatic cleaning equipment with cleaning circuit, when ion selects
Electrode 111 is selected after extracting in any solution pool 105 to be measured or any standard solution pool 106, in the control of motion controller 112
Under, the working region of electrode clean mechanism 113 is run to, cleaning ion-selective electrode 111 is sensitive automatically for electrode clean mechanism 113
The ion of film surface.
It is understood that in order to avoid the solution cross contamination bring inspection in solution pool 105 to be measured and standard pool 106
Error is surveyed, when ion-selective electrode 111 is started to work, ion-selective electrode 111 first cleans in electrode clean mechanism 113,
After ion-selective electrode 111 is extracted from any solution pool 105 to be measured or any standard solution pool 106 every time, electrode clean
Ion-selective electrode 111 again cleans in mechanism 113.
It is understood that ion-selective electrode 111 needs to be replaced according to the type to measured ion, such as detection nitrogen
Ion concentration, selection can export the Nitrogen ion selection electrode of the voltage signal comprising Nitrogen ion solution, detect potassium concentration, choosing
Select the potassium ion-selective electrode that can export the voltage signal comprising potassium ion solution.
The ion-selective electrode that 1 detection particular types ion concentration can be set on electrode fixuture 107, can also be simultaneously
The ion-selective electrode of multiple different types of ion concentrations of detection is set, for example detection nitrogen, potassium, calcium, 3 kinds of ions are set simultaneously
The ion-selective electrode of concentration can disposably obtain the concentration of nitrogen in solution to be measured, potassium, calcium, 3 kinds of ions in this way.
It is understood that a kind of ion concentration on-line measuring device provided in this embodiment had both included selecting electricity to ion
The component that pole 111 is demarcated, for example, it is horizontal guide rail 101, horizontal screw lead 114, the first sliding block 102, vertical guide rail 103, vertical
Lead screw 115, the second sliding block 104, at least two standard solution ponds 106, electrode fixuture 107, the 108, first electricity of voltage collector
Machine 109, the second motor 110, motion controller 112 and electrode clean mechanism 113, on this basis again include to solution to be measured into
The component of row ion concentration on-line checking, such as at least one solution pool 105 to be measured, voltage collector 108, therefore the present embodiment mentions
A kind of ion concentration on-line measuring device supplied, which can be realized, demarcates ion-selective electrode 111, and can realize to be measured
Solution ion concentration on-line checking.
Preferably, in order to improve 111 stated accuracy of ion-selective electrode, the solution concentration in standard solution pond 106 is set
Change in gradient, such as 25ppm, 50ppm, 100ppm, 200ppm, 400ppm, 800ppm.
As shown from the above technical solution, a kind of nutrient solution ion concentration on-line measuring device provided by the invention, passes through fortune
Movement controller is connected with multiple motors, and the ion-selective electrode realized on the electrode fixuture inserts or pull out any one
The solution pool to be measured or any one of standard solution pond, and ion-selective electrode output is acquired by voltage collector
Voltage value, subsequently through the logarithm to the solution concentration in the voltage value that collects and each standard solution pond into
Row linear fit can be obtained corresponding to the linear pass between the voltage value of the ion-selective electrode and the logarithm of solution concentration
System, the technical solution provided according to the present invention is, it can be achieved that the automation to ion-selective electrode is demarcated.
It is understandable to be, since ion-selective electrode needs continually to carry out in use artificially in the prior art
Calibration by hand, and the use of ion-selective electrode is generally implementing scene, such as in soilless cultivation greenhouse, and ion is selected
The calibration of electrode usually all carries out under lab, and such user needs frequently to travel to and fro between implementation scene and laboratory, serious shadow
The detection efficiency for having rung ion concentration constrains the realization of nutrient solution ion concentration on-line checking.
And the calibration component and detection components of a kind of nutrient solution ion concentration on-line measuring device provided by the invention are collection
At together, it can also be achieved the detection of solution ion concentration to be measured after realizing to the calibration of ion-selective electrode, improve
The detection efficiency of nutrient solution ion concentration realizes the on-line checking of nutrient solution ion concentration.
In addition, the process artificially participated in compared with prior art, is reduced due to technical solution provided by the invention, it is time saving
Laborsaving, working efficiency is relatively high, can reduce due to ion-selective electrode potential drifting and the inspection of bring nutrient solution ion concentration
Survey the relatively low influence of precision.
It should be noted that by a large amount of it is demonstrated experimentally that a kind of nutrient solution ion concentration provided by the invention is examined online
Device is surveyed, automation calibration and nutrient solution ion concentration to the ion-selective electrode of soilless culture nutrient fluid are particularly suitable for
On-line checking.
In addition, by solution type and ion-selective electrode type in the standard solution pond in replacement the present embodiment, also
The detection to solution ph may be implemented, for example the solution in standard solution pond is changed to acid-base solution, ion is selected into electricity
Pole is changed to pH electrode.
Preferably, the solution pool to be measured 105 is provided with liquid supply pipe, for solution to be measured to be imported the solution pool to be measured
In 105；
The solution pool to be measured 105 is provided with return pipe, for will test described in the solution to be measured export of ion concentration
Solution pool 105 to be measured.
It is understood that since solution pool 105 to be measured is provided with liquid supply pipe, return pipe, therefore can be according to detection needs
The solution to be measured in solution pool 105 to be measured is updated, it is dense that a variety of solution to be measured can be realized in one solution pool 105 to be measured of setting in this way
The detection of degree, while derived solution to be measured can also carry out otherwise utilization again from solution pool 105 to be measured, for example lead
Enter into cultivation system and recycles etc..
Preferably, the service sink of the electrode clean mechanism 113 is provided with water inlet pipe, described in importing deionized water
In service sink；
The service sink of the electrode clean mechanism 113 is provided with outlet pipe, for used deionized water to be exported institute
State service sink.
It is understood that water inlet pipe, outlet pipe is arranged in the service sink of electrode clean mechanism 113, service sink may be implemented
In deionized water real-time update.
Preferably, described device further includes voltage amplifier, is exported with default amplification factor amplification ion-selective electrode 111
Voltage signal.
It is understood that the voltage signal that ion-selective electrode 111 exports is very faint, need voltage amplifier by pre-
If amplification factor is amplified in the threshold range that voltage collector 108 can acquire.
Fig. 2 be another embodiment of the present invention provides a kind of nutrient solution ion concentration on-line measuring device 200 schematic block
Figure.Referring to fig. 2, which includes：
Horizontal guide rail 101, horizontal lead screw 114, the first sliding block 102, vertical guide rail 103, down-feed screw 115, the second sliding block
104, at least one solution pool 105 to be measured of third guide rail 201, third screw rod 204, third sliding block 202, at least two standard solution
Pond 106, electrode fixuture 107, voltage collector 108, first motor 109, the second motor 110, third motor 203, movement control
Device 112 processed and electrode clean mechanism 113；Wherein,
The horizontal guide rail 101 is for fixing the horizontal lead screw 114, and the vertical guide rail 103 is for fixing described hang down
Raw silk rings bar 115, the third guide rail 201 is for fixing the third screw rod 204；
The down-feed screw 115 is fixed on the horizontal lead screw 114 by first sliding block 102, the horizontal silk
Bar 114 is connected with the first motor 109；
The third screw rod 204 is fixed on the down-feed screw 115 by second sliding block 104, perpendicular to described
Horizontal lead screw 114 and the down-feed screw 115, the down-feed screw 115 are connected with second motor 110；
The electrode fixuture 107 is fixed on the third screw rod 204 by the third sliding block 202, the third
Screw rod 204 is connected with the third motor 203；
The motion controller 112 and the first motor 109, second motor 110 and 203 phase of third motor
Even, be moved at the position of any one of solution pool to be measured 105 for controlling the vertical guide rail 103 or any one
At the position in the standard solution pond 106, and it will be arranged for controlling the electrode fixuture 107 in the electrode fixuture
Ion-selective electrode 111 on 107 inserts or pull out any one of solution pool to be measured 105 or any one of standard
Solution pool 106；
The voltage collector 108 with the voltage output end of ion-selective electrode 111 for being connected, to acquire ion selection
The voltage value that electrode 111 exports；
The electrode clean mechanism 113 is attached to ion selection for cleaning to ion-selective electrode 111, to remove
The ion of the sensitive film surface of electrode 111.
As shown from the above technical solution, a kind of 200 phase of nutrient solution ion concentration on-line measuring device provided in this embodiment
Than a kind of nutrient solution ion concentration on-line measuring device 100 that Fig. 1 is provided, increases the third for fixing third screw rod and lead
Rail, third sliding block, and the third motor being connected with third screw rod, improve ion-selective electrode in the accurate positioning of spatial position
Degree.
As shown in figure 3, a kind of mark ion-selective electrode using above-mentioned nutrient solution ion concentration on-line measuring device
Fixed method, including：
Step S1, ion-selective electrode is arranged on the electrode fixuture according to pre- by motion controller control
It is fixed to be sequentially sequentially inserted into each standard solution pond, it is inserted each time by the electrode clean mechanism in ion-selective electrode
Ion-selective electrode is cleaned before entering standard solution pond, and ion-selective electrode is acquired by the voltage collector and is existed
The voltage value exported when in each standard solution pond；
Step S2, the logarithm of the solution concentration in the voltage value and each standard solution pond collected is carried out
Linear fit, to obtain corresponding to the linear relationship between the voltage value of the ion-selective electrode and the logarithm of solution concentration.
As shown from the above technical solution, a kind of above-mentioned nutrient solution ion concentration on-line checking of use provided in this embodiment fills
The method demarcated to ion-selective electrode is set, by the voltage value and each standard solution pond collected
The logarithm of solution concentration carries out linear fit, has obtained pair of the voltage value and solution concentration corresponding to the ion-selective electrode
Linear relationship between numerical value.The technical solution provided according to the present invention is, it can be achieved that the automation to ion-selective electrode is demarcated.
Preferably, molten in each standard by voltage collector acquisition ion-selective electrode described in step S1
The voltage value exported when in liquid pool, specifically includes：
The voltage signal exported when by default amplification factor amplification ion-selective electrode in each standard solution pond,
Obtain amplified voltage signal；
After the amplitude variation of the amplified voltage signal within a preset time is lower than preset value, pass through the voltage
Collector acquires amplified voltage value.
Wherein, after the amplitude variation of the amplified voltage signal within a preset time is lower than preset value, pass through institute
It states voltage collector and acquires amplified voltage value, such as：Amplitude variation of the amplified voltage signal in 2 seconds is less than 2mV,
Amplified voltage value is acquired by voltage collector, it is ensured that after ion-selective electrode steady operation, voltage collector is again
Collection voltages value can reduce voltage measurement error, improve stated accuracy.
Preferably, the logarithm of the described pair of voltage value collected and the solution concentration in each standard solution pond
Linear fit is carried out, to obtain corresponding to the linear pass between the voltage value of the ion-selective electrode and the logarithm of solution concentration
System, specifically includes：
Minimum two is used to the logarithm of the solution concentration in the voltage value and each standard solution pond collected
Multiplication carries out linear fit, to obtain corresponding to the line between the voltage value of the ion-selective electrode and the logarithm of solution concentration
Sexual intercourse.
As shown in figure 4, a kind of mark ion-selective electrode using above-mentioned nutrient solution ion concentration on-line measuring device
Fixed equipment 300, including：
The control module 301 being respectively connected with the motion controller 112 and the voltage collector 108, for passing through
The control of motion controller 112 is arranged on the electrode fixuture 107 ion-selective electrode and successively inserts according to predetermined order
Enter in each standard solution pond 106, standard is inserted into ion-selective electrode by the electrode clean mechanism 113 each time
Ion-selective electrode is cleaned before solution pool 106, and ion-selective electrode is acquired by the voltage collector 108 and is existed
The voltage exported when in each standard solution pond 106；
The computing module 302 for connecting the control module, voltage value and each institute for being obtained to the control module
The logarithm for stating the solution concentration in standard solution pond 106 carries out linear fit, to obtain corresponding to the ion-selective electrode
Linear relationship between voltage value and the logarithm of solution concentration.
As shown from the above technical solution, a kind of above-mentioned nutrient solution ion concentration on-line checking of use provided in this embodiment fills
Set the device demarcated to ion-selective electrode, the voltage value that voltage collector is collected by computing module with it is each
The logarithm of solution concentration in the standard solution pond carries out linear fit, has obtained the electricity corresponding to the ion-selective electrode
Linear relationship between pressure value and the logarithm of solution concentration.The technical solution provided according to the present invention is, it can be achieved that select ion
Select the automation calibration of electrode.
Preferably, the equipment further includes：
Human-computer interaction module is started to work for receiving the triggering command of user with controlling the control module 301；
It is also used to receive the solution concentration value in the standard solution pond of user's input, and exports to the computing module 302；
It is also used to receive the voltage value for the ion-selective electrode that the computing module 302 exports and pair of solution concentration
Linear relationship between numerical value.
Understandable to be, the human-computer interaction module is user's input-output equipment, such as touch screen or with function keyboard
Display etc..
Fig. 5 be another embodiment of the present invention provides use a kind of nutrient solution ion concentration on-line measuring device structural representation
Figure, as shown in figure 5, the device includes：Calibrating table 1, solution pool to be measured 2, feed liquid pipeline 3, reflux line 4, electrode clean pond 5,
Water inlet line 6, outlet conduit 7, standard solution pond 8, standard solution pond 9, standard solution pond 10, standard solution pond 11, standard are molten
Liquid pool 12, standard solution pond 13, host computer 14, controller 15, X-axis motor 16, X-axis guide rail 17, X-axis lead screw 18, y-axis motor
19, Y-axis guide rail 20, Y-axis lead screw 21, sliding block 22, electrode holder 23, ion-selective electrode 24.
Wherein, host computer 14 is used for complete monitoring ion concentration on-line checking process, and using least square method to acquisition
To voltage value and the logarithm of concentration of standard solution do linear fit, the linear relation both obtained, while providing and including
The human-computer interaction interface of the information such as matched curve image, linear relation and the degree of correlation.
Wherein, 15 internal structure schematic block diagram of controller is as shown in fig. 6, as shown in fig. 6, controller 15 specifically includes：5V/
12V Switching Power Supply 25,24V Switching Power Supply 26, X-axis controllor for step-by-step motor 27, y-axis stepper motor motion controller 28, simulation
Measure input module 29, programmable controller 30.
Equipment concrete operating principle shown in fig. 5 is：The central processing unit of host computer 14 receives user and passes through host computer
After the triggering command that 14 human-computer interaction interface is sent, enabled instruction and fortune are exported to the programmable controller 30 in controller 15
Dynamic control instruction, control X-axis controllor for step-by-step motor 27, y-axis stepper motor motion controller 28 convert vulnerabilities scan signal
For heavy-current control signal, output is to X-axis motor 16 and y-axis motor 19, to control the ion being fixed on electrode holder 23 selection electricity
Pole 24 inserts or pull out any one in solution pool 2 to be measured, electrode clean pond 5 or standard solution pond 8~13；Wherein X-axis walks
(attached to be not shown in the figure) feedback of reference position detection module is understood into electric machine controller 27, y-axis stepper motor motion controller 28
The current position of ion-selective electrode 24 carries out position compensation, to realize ion-selective electrode along X-axis guide rail 17 and Y-axis guide rail
20 linear motion.
In the specific implementation, ion-selective electrode is demarcated using equipment shown in fig. 5, and to nutrient solution nitrate anion
Nitrogen ion concentration is detected, and specific step is as follows：
Step 1：It is molten to input six standards on the human-computer interaction interface of host computer 14 for clamping ion-selective electrode 24
The concentration value of liquid, respectively 25ppm, 50ppm, 100ppm, 200ppm, 400ppm, 800ppm press start button, ion-conductance
24 setting in motion of pole, extends downwardly into the deionized water in electrode clean pond 5；
Step 2：After cleaning, sliding block 22 is translatable to the left after driving ion-selective electrode 24 first to move upwards, last fortune downwards
It is dynamic, it protrudes into the standard solution in standard solution pond 8；
Step 3：Programmable controller 30 sends acquisition instructions and gives voltage acquisition module (attached to be not shown in the figure), and voltage is adopted
Collection module starts to acquire the voltage signal that ion-selective electrode 24 exports, when the voltage signal amplitude variation in adjacent 2 seconds is less than
When 2mV, the corresponding voltage value of the concentration of standard solution that the voltage value measured at this time is assigned in standard solution pond 8 is
690mV；
Step 4：The first vertical movement upwards of ion-selective electrode 24, horizontal movement to the left, moves vertically still further below later,
It protrudes into the deionized water in electrode clean pond 5；
Step 5：After 20 seconds, sliding block 22 drive ion-selective electrode 24 first move upwards, be then translatable to the right, finally to
Lower movement, is protruded into the standard solution in standard solution pond 9；
Step 6：Programmable controller 30 sends instructions to voltage acquisition module, and voltage acquisition module starts to acquire ion
The voltage signal for selecting electrode 24 to export, when the voltage signal amplitude variation in adjacent 2 seconds is less than 2mV, by what is measured at this time
The corresponding voltage value of the concentration of standard solution that voltage value is assigned in standard solution pond 9 is 621mV；
Step 7：The first vertical movement upwards of ion-selective electrode 24, horizontal movement to the left, moves vertically still further below later,
It protrudes into the deionized water in electrode clean pond 5；
The rest may be inferred, and obtaining the corresponding voltage value of concentration of standard solution in standard solution pond 10 is 492mV；Standard solution
The corresponding voltage value of concentration of standard solution in pond 11 is 405mV；The corresponding electricity of concentration of standard solution in standard solution pond 12
Pressure value is 305mV；The corresponding voltage value of concentration of standard solution in standard solution pond 13 is 227mV.
Step 8：The ion concentration that the voltage value and step 1 that the central processing unit of host computer 14 obtains step 7 obtain
Logarithm carries out linear fit, obtains linear relation：Y=-317.956X+1140.437
Step 9：After cleaning ion electrode 24, ion electrode 24 is translatable to the right after first moving upwards, and finally moves downward,
It moves into solution pool 2 to be measured, voltage acquisition module acquires the nutrient solution nitre in the solution pool to be measured 2 that ion-selective electrode 24 exports
The corresponding voltage signal of acid group Nitrogen ion concentration.
In the specific implementation, also equipment detection accuracy shown in fig. 5 is verified, it is specific as follows：
Known 14 groups of nutrient solutions nitrate anion Nitrogen ion concentration is respectively：32.906ppm,94.018ppm,188.036ppm,
235.045ppm、282.054ppm、329.063ppm、376.072ppm、423.081ppm、470.09ppm、517.099ppm、
564.108ppm, 611.117ppm, 658.126ppm, 752.144ppm,
After demarcating using equipment shown in fig. 5 to ion-selective electrode, fit correlation formula Y=-317.956X+ is obtained
1140.437, then the electricity corresponding to the nitrate anion Nitrogen ion concentration for acquiring above-mentioned 14 groups of nutrient solutions using device shown in fig. 5
Pressure value obtains 14 groups of testing results：680mV,585mV,454mV,421mV,392mV,366mV,360mV,332mV,334mV,
271mV,265mV,247mV,270mV,240mV；
Host computer 14 in equipment shown in Fig. 5 calculates 14 groups using fit correlation formula Y=-317.956X+1140.437
Nutrient solution nitrate anion Nitrogen ion concentration is respectively：38.592ppm,77.344ppm,169.082ppm,216.287ppm,
244.623ppm、310.660ppm、336.419ppm、418.055ppm、397.391ppm、466.026ppm、512.031ppm、
542.571ppm、609.226ppm、709.292ppm。
As shown in fig. 7, being compared with 14 groups of nutrient solution nitrate anion Nitrogen ion concentration that equipment shown in Fig. 5 detects and
The 14 groups of nutrient solution nitrate anion Nitrogen ion concentration known, it can be seen that the nutrient solution nitric acid detected using equipment shown in fig. 5
Root Nitrogen ion concentration value and actual value are coincide preferably, and equipment detection accuracy shown in fig. 5 is preferable.
To sum up, a kind of nutrient solution ion concentration on-line measuring device provided by the invention and the use device select ion
The method and apparatus that electrode is demarcated, wherein nutrient solution ion concentration on-line measuring device passes through motion controller and multiple electricity
Machine is connected, and realizes the ion-selective electrode on the electrode fixuture and inserts or pull out any one solution pool to be measured or appoint
It anticipates a standard solution pond, and passes through the voltage value that voltage collector acquires ion-selective electrode output；Use the nutrient solution
The method that ion concentration on-line measuring device demarcates ion-selective electrode is based on Nernst equation, by acquiring
The logarithm of solution concentration in the voltage value arrived and each standard solution pond carries out linear fit, has obtained corresponding to and be somebody's turn to do
Linear relationship between the voltage value of ion-selective electrode and the logarithm of solution concentration.The technical side provided according to the present invention
Case can not only realize the automation calibration to ion-selective electrode, but also can realize the on-line checking of solution ion concentration to be measured.
In addition, the process artificially participated in compared with prior art, is reduced due to technical solution provided by the invention, it is time saving
Laborsaving, working efficiency is relatively high, can reduce due to ion-selective electrode potential drifting and bring ion concentration measurement precision
Relatively low influence.
In the present invention, term " first ", " second " " third " are used for description purposes only, and should not be understood as instruction or dark
Show relative importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of nutrient solution ion concentration on-line measuring device, which is characterized in that slided including horizontal guide rail, horizontal screw lead, first
Block, vertical guide rail, down-feed screw, the second sliding block, third guide rail, third screw rod, third sliding block, at least one solution pool to be measured,
At least two standard solution ponds, electrode fixuture, voltage collector, first motor, the second motor, third motor, motion control
Device and electrode clean mechanism；Wherein,
At least one described solution pool to be measured and at least two standard solution pond are arranged at the side of the horizontal guide rail,
And it is arranged along the horizontal guide rail；
The horizontal guide rail is for fixing the horizontal lead screw, and the vertical guide rail is for fixing the down-feed screw, and described the
Three guide rails are for fixing the third screw rod；
The down-feed screw is fixed on the horizontal lead screw by first sliding block, the horizontal lead screw and first electricity
Machine is connected；
The third screw rod is fixed on the down-feed screw by second sliding block, perpendicular to the horizontal lead screw and described
Down-feed screw, the down-feed screw are connected with second motor；
The electrode fixuture is fixed on the third screw rod by the third sliding block, the third screw rod and the third
Motor is connected；
The motion controller is connected with the first motor, second motor and the third motor, described for controlling
Vertical guide rail is moved at the position of any one of solution pool to be measured or the position in any one of standard solution pond
Place, and appoint for controlling the electrode fixuture and inserting or pull out the ion-selective electrode being arranged on the electrode fixuture
One solution pool to be measured of meaning or any one of standard solution pond；
The voltage collector with the voltage output end of ion-selective electrode for being connected, to acquire ion-selective electrode output
Voltage value；
The electrode clean mechanism is attached to ion-selective electrode sensitive membrane for cleaning to ion-selective electrode, to remove
The ion on surface.
2. nutrient solution ion concentration on-line measuring device according to claim 1, which is characterized in that
The solution pool to be measured is provided with liquid supply pipe, for importing solution to be measured in the solution pool to be measured；
The solution pool to be measured is provided with return pipe, and the solution to be measured for that will measure ion concentration exports the solution to be measured
Pond.
3. nutrient solution ion concentration on-line measuring device according to claim 1, which is characterized in that
The service sink of the electrode clean mechanism is provided with water inlet pipe, for importing deionized water in the service sink；
The service sink of the electrode clean mechanism is provided with outlet pipe, for used deionized water to be exported the cleaning
Pond.
4. nutrient solution ion concentration on-line measuring device according to claim 1, which is characterized in that further include voltage amplification
Device, to preset the voltage signal of amplification factor amplification ion-selective electrode output.
5. a kind of nutrient solution ion concentration on-line measuring device using as described in any one of Claims 1-4 is to ion
The method that selection electrode is demarcated, which is characterized in that including：
By the motion controller control be arranged on the electrode fixuture ion-selective electrode according to predetermined order successively
It is inserted into each standard solution pond, standard solution is inserted into ion-selective electrode by the electrode clean mechanism each time
Ion-selective electrode is cleaned before pond, and ion-selective electrode is acquired in each mark by the voltage collector
The voltage value exported when in quasi- solution pool；
Linear fit is carried out to the logarithm of the solution concentration in the voltage value and each standard solution pond collected, with
It obtains corresponding to the linear relationship between the voltage value of the ion-selective electrode and the logarithm of solution concentration.
6. the method according to claim 5 demarcated to ion-selective electrode, which is characterized in that described by described
The voltage value that voltage collector exports when acquiring ion-selective electrode in each standard solution pond, specifically includes：
The voltage signal exported when by default amplification factor amplification ion-selective electrode in each standard solution pond, obtains
Amplified voltage signal；
After the amplitude variation of the amplified voltage signal within a preset time is lower than preset value, pass through the voltage acquisition
Device acquires amplified voltage value.
7. the method according to claim 5 demarcated to ion-selective electrode, which is characterized in that described pair acquires
The logarithm of solution concentration in the voltage value arrived and each standard solution pond carries out linear fit, is somebody's turn to do with obtaining corresponding to
Linear relationship between the voltage value of ion-selective electrode and the logarithm of solution concentration, specifically includes：
Least square method is used to the logarithm of the solution concentration in the voltage value and each standard solution pond collected
Linear fit is carried out, to obtain corresponding to the linear pass between the voltage value of the ion-selective electrode and the logarithm of solution concentration
System.
8. a kind of nutrient solution ion concentration on-line measuring device using as described in any one of Claims 1-4 is to ion
The equipment that selection electrode is demarcated, which is characterized in that including：
The control module being respectively connected with the motion controller and the voltage collector, for passing through the motion controller
Control is arranged on the electrode fixuture ion-selective electrode and is sequentially inserted into each standard solution pond according to predetermined order
In, by the electrode clean mechanism before ion-selective electrode is inserted into standard solution pond each time to ion-selective electrode into
The electricity exported when going and clean, and acquiring ion-selective electrode in each standard solution pond by the voltage collector
Pressure；
The computing module for connecting the control module, the voltage value and each standard for obtaining to the control module are molten
The logarithm of solution concentration in liquid pool carries out linear fit, to obtain the voltage value and solution corresponding to the ion-selective electrode
Linear relationship between the logarithm of concentration.
9. the equipment according to claim 8 demarcated to ion-selective electrode, which is characterized in that further include：
Human-computer interaction module is started to work for receiving the triggering command of user with controlling the control module；
It is also used to receive the solution concentration value in the standard solution pond of user's input, and exports to the computing module；
Be also used to receive the ion-selective electrode of computing module output voltage value and solution concentration logarithm it
Between linear relationship.
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| Title |
|---|
| Automated sensing of hydroponic macronutrients using a computer-controlled system with an array of ion-selective electrodes;Hak-Jin Kim等;《Computers and Electronics in Agriculture》;20130120;第93卷;摘要，第48页以及图1-2 * |
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