CN106932444A - A kind of batching interface test experience device and experimental technique based on electrical conductivity - Google Patents
A kind of batching interface test experience device and experimental technique based on electrical conductivity Download PDFInfo
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Abstract
The present invention relates to a kind of batching interface test experience device and experimental technique based on electrical conductivity, it is characterised in that：It include a signal generator, two be provided with some annular measurement apparatus to conducting probe, two signal processing circuits, the data collecting card of two different resolutions and a host computer.Experimental channel end is arranged on before and after two annular measurement apparatus, the input of each pair of conducting probe is connected with signal generator thereon；Each pair of output end of conducting probe is connected with two signal processing circuits respectively in two annular measurement apparatus, and the output signal to each pair of conducting probe in annular measurement apparatus is demodulated, and obtains reflecting the DC current signal of solution concentration, is transported to data collecting card.Two data collecting cards are respectively used to be modulated demodulation to each road DC current signal for obtaining, and convert thereof into and be transported to after standard current signal host computer and carry out data processing, storage and show.The present invention can be widely applied in the batching interface detection of Batch Transportation.
Description
Technical field
The present invention relates to a kind of sequentially-fed contaminated product measurement apparatus, especially with regard to a kind of batching interface based on electrical conductivity
Test experience device and experimental technique.
Background technology
When carrying out sequentially-fed along pipeline, it is successful sequentially-fed that reliably and accurately the contaminated product in contaminated product area is measured
Primary condition, is also that laboratory carries out the accurate essential condition for grasping contaminated product change when sequentially-fed contaminated product is studied.Contaminated product is measured
Device is typically mounted at website first and last end and carries out mixing concentration detection, to determine the mixed of institute's oil transportation product according to mixing concentration change
The moment that oil passes through sends a signal to gate valve switching device and accurately carries out Mixing gas, so that each section of oil product delivers to different storages
Tank.
Most widely used monitoring method and instrument have following several on current processed oil pipeline：One is close based on oil product
The principle of difference is spent, that is, contaminated product detection is carried out using densitometer；The second is capacitor type instrument, the principle of this measurement apparatus is
The change of sequentially-fed oil product concentration is determined according to the change of contaminated product dielectric constant；The third is based on ultrasonic wave, light in oil stream
The principle of velocity of wave propagation change；The fourth is the index of refraction difference based on different medium, contaminated product is carried out using Systems for optical inspection
Interface detection.However, above-mentioned several contaminated product detection methods carry out contaminated product test experience and can not grasp on tube section in laboratory
The mixing concentration of various location.
As shown in figure 1, in recent years, pipeline section flow parameter measurement technology is widely used in multiphase pipe flow aspect, example
Such as application conducting probe measures the liquid holdup of biphase gas and liquid flow, and then mixing concentration to various location on tube section is surveyed
Amount.It is have certain based on the conductance between two electrodes on special pipeline section and thickness of liquid film using conducting probe measurement
Relation is measured.Its principle is that the conductance of liquid of certain altitude highly has certain relation with it, therefore by surveying
The conductance of probe surrounding liquid is measured to obtain liquid height.The shortcoming of the technology is：1. can only be in collection tube on the pipeline section
The data of the measurement point at the heart, it is impossible to which comprehensively liquid holdup overall on a certain section of reacting pipe is distributed gentle liquid measure change spy
Point；2. the degree of accuracy due to requiring measurement is high, and to measure the liquid holdup Changing Pattern of a certain radial direction, tiny probe needs
Through whole pipeline, and under certain flow velocity impact, the probe in pipeline may be washed deformation, it is therefore necessary in probe
Two ends fasten probe using relaxation device such as AB glue, but because probe is fixed on pipeline by AB glue, its tension
Differ and surely realize.Therefore the deformation of probe be can not ignore on the precision influence for measuring.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of batching interface test experience device based on electrical conductivity and
Experimental technique, by the annular measurement apparatus with multipair conducting probe that set on same tube section it is different radially at
Mixing concentration value is detected that certainty of measurement is high.
To achieve the above object, the present invention takes following technical scheme：A kind of batching interface detection based on electrical conductivity is real
Experiment device, it is characterised in that：It include a signal generator, two be provided with some annular measurement apparatus to conducting probe,
Two signal processing circuits, the data collecting card of two different resolutions and a host computer；Set before and after annular measurement apparatus described in two
Put in the pipeline of experimental channel test section end, each pair of input of conducting probe and the letter in annular measurement apparatus described in two
Number generator is connected；In annular measurement apparatus described in two each pair of output end of conducting probe respectively with signal processing circuit described in two
It is connected；The signal generator provides input signal for each pair of conducting probe in two annular measurement apparatus, at signal described in two
Reason circuit is respectively used to be demodulated the output signal of each pair of conducting probe in annular measurement apparatus, obtains reflecting solution concentration
DC current signal, and be transported to data collecting card described in two；Data collecting card described in two is respectively used to each road to obtaining
DC current signal is modulated demodulation, to convert thereof into and be transported to the host computer after standard current signal and carry out at data
Reason, storage and display.
The annular measurement apparatus include an annular gasket and some conducting probes to being fixedly installed on annular gasket；
The wherein first pair conducting probe be fixedly installed on by the annular gasket center it is any diametrically, remaining is each to described
Conducting probe be arranged in parallel with first pair of conducting probe respectively, and each vertical range to the conducting probe is according to measurement
Depending on required precision, to ensure to measure the concentration value for obtaining different radial directions on tube section；It is each to two conductances in the conducting probe
Radial outer edge of the outer end of probe with the annular gasket aligns, conducting probe described in two it is inner close to but do not contact.
The annular gasket in the annular measurement apparatus need to be with the test section end internal diameter of the pipeline phase of experiment pipeline section
Match somebody with somebody.
Each pair of conducting probe is fixedly installed on the annular gasket by epoxide-resin glue.
Annular measurement apparatus are one in front and one in back arranged on experiment tube by four flanges being welded on experimental channel described in two
Sealed with teflon gasket between road end, and annular measurement apparatus contact surface described in the flange and two.
A kind of batching interface test experience method based on electrical conductivity of use described device, it is characterised in that including following
Step：1) some conducting probes to different length are made；2) conducting probe is demarcated, obtains mixing concentration value and conductance
The fit correlation of probe output current value；3) after the completion of demarcating, each pair of conducting probe is fixed on annular gasket, constitutes two sets
Annular measurement apparatus；4) two collar-shaped measurement apparatus are arranged in the end pipeline of experimental channel test section, and are inputted
End is connected with signal generator, and the output signal of signal generator is configured according to requirement of experiment；5) two annulars are measured
The data collecting card that each pair of output end of conducting probe of device is different from two data processing circuits, two resolution ratio successively is connected；
6) according to the fit correlation of the mixing concentration value that obtains and conducting probe output current value, and conducting probe output current
Value, obtains the different radially corresponding mixing concentration values of tube section in Batch Transportation Pipeline.
The step 1) in, the preparation method of conducting probe is comprised the following steps：1. syringe is determined according to requirement of experiment
The concrete model of syringe needle and the diameter of platinum filament, and syringe needle and platinum filament are cut to required length, and use abrasive machine
Polished, make otch smooth；2. polytetrafluoroethylene (PTFE) tubule is cut into required length, and the platinum filament insertion poly- four that will be handled well
In PVF tubule, two ends are reserved one section of platinum filament and are exposed outside pipe respectively, another to ensure that one end platinum filament can be connected with data wire
End platinum filament can be contacted with conducting solution；3. the polytetrafluoroethylene (PTFE) tubule that platinum filament will be inserted inserts ready syringe needle
It is interior；4. to fill insulant in syringe needle, platinum filament is insulated with syringe needle；5. by syringe needle outer wall
Coating glass glue is insulated, and the two ends platinum filament reserved in ensureing step 2. is mutually on-insulated, obtains conducting probe.
The step 2) in, the method demarcated to conducting probe is comprised the following steps：1. to the beaker of a constant volume
It is middle to add a certain amount of edible salt, after edible salt dissolves completely, brine density is measured with B；2. by two conducting probes
It is fixed on hardboard with AB glue, two ends are connected with signal generator and signal processing circuit respectively by holding wire, fixed
The hardboard for having conducting probe is placed on beaker, makes the tip immersion salt solution of conducting probe；3. the output of setting signal generator
Voltage provides input signal for conducting probe, and signal processing circuit is demodulated to the output signal of conducting probe, and by number
Host computer is sent to according to capture card, the current output value under the brine strength is obtained；4. hardboard is taken away gradually to add in beaker
Enter a certain amount of edible salt, every time with the density that the salt solution is measured after salt, 3. repeat step measures multi-group data；5. host computer pair
Experimental data is analyzed treatment, obtains the fit correlation of different brine strengths and conducting probe output current value.
Due to taking above technical scheme, it has advantages below to the present invention：1st, the present invention is due in annular measurement apparatus
Multipair conducting probe is provided with, the mixing concentration value at the different radial directions on same tube section, measurement result can be simultaneously measured
It is more accurate.2nd, it is of the invention because each pair of conducting probe is fixedly installed on annular gasket by AB glue, with certain tensioning
Effect so that probe will not be washed deformation, it is ensured that certainty of measurement higher.3rd, the present invention is due in annular measurement apparatus
The logarithm and distance of conducting probe can be set according to experiment needs, can meet the measurement of different accuracy requirement,
Range of application is wider.4th, it is of the invention because each pair of output signal of conducting probe in annular measurement apparatus can be by signal transacting
Shown in real time by host computer after circuit, data acquisition board, the Concentration Testing result observation to batching interface is more directly perceived.5、
Due to being provided with two collar-shaped measurement apparatus, the concentration to upstream and downstream oil product in pipeline is measured the present invention respectively, is expanded
Detect the scope of range and improve accuracy of detection.Simple structure of the present invention, it is easy to operate, thus the present invention can extensive use
Batching interface detection field in sequentially-fed.
Brief description of the drawings
Fig. 1 is conducting probe structural representation in the prior art；Wherein, figure (a) is front view, and figure (b) is that tube section shows
It is intended to；
Fig. 2 is schematic structural view of the invention；
Fig. 3 is specific embodiment schematic diagram of the invention；
Fig. 4 is annular measurement apparatus structural representation of the invention；
Fig. 5 is the manufacturing process schematic diagram of conducting probe of the present invention；
Fig. 6 is the pass that brine strength and electric current output when brine density reaches 1.260g/ml are configured in the embodiment of the present invention
System's figure；
Fig. 7 is to configure brine strength when brine density reaches saturation 1.334g/ml in the embodiment of the present invention to be exported with electric current
Graph of a relation.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
As shown in Figure 2 and Figure 3, batching interface test experience device of the present invention based on electrical conductivity includes a signal generator
1st, two annular measurement apparatus 2, two signal processing circuits 3, the host computer 5 of data collecting card 4 and of two different resolutions.Two rings
It is arranged in the pipeline of experimental channel test section end before and after shape measurement apparatus 2, it includes annular gasket 21 and is arranged on annular
It is some to conducting probe 22 on pad 21；Each pair of input of conducting probe 22 occurs with signal in two annular measurement apparatus 2
Device 1 is connected, and each pair of output end of conducting probe 22 is connected with two signal processing circuits 3 respectively in two annular measurement apparatus 2.Signal
Generator 1 is used to provide input signal for each pair of conducting probe 22 in two annular measurement apparatus 2；Two signal processing circuits 3 are used
The output signal of each pair of conducting probe 22 is demodulated on to two annular measurement apparatus 2, obtains reflecting the direct current of solution concentration
Current signal, and it is transported to data collecting card 4；Two data collecting cards 4 are respectively used to enter each road DC current signal for obtaining
Row modulation /demodulation, converts thereof into and be transported to after standard current signal host computer 5 and carry out data processing, storage and show.
As shown in figure 4, annular measurement apparatus 2 include an annular gasket 21 and some to being fixedly installed on annular gasket 21
Conducting probe 22.Only it is introduced by taking four pairs of conducting probes 22 as an example in the present invention, but not limited to this.Wherein, first pair of electricity
Lead probe be fixedly installed on by the center of annular gasket 21 it is any diametrically, remaining each pair of conducting probe respectively with first pair of electricity
Probe is led to be arranged in parallel, and each pair of vertical range of conducting probe according to certainty of measurement requirement depending on, to ensure that measurement is managed
The concentration value of different radial directions on section.Meanwhile, the outer end of two conducting probes is outer with annular gasket 21 in each pair of conducting probe
Footpath justified margin, two conducting probes it is inner close to but do not contact, obtain any radially each point of tube section to ensure to measure
Change in concentration.
In the various embodiments described above, the external diameter of the annular gasket 22 in annular measurement apparatus 2 need to be with the test section of experimental channel
End internal diameter of the pipeline matches.
In the various embodiments described above, each pair of conducting probe 22 is fixedly installed on annular gasket 21 by epoxide-resin glue.
In the various embodiments described above, two annular measurement apparatus 2 by four flanges being welded on experimental channel one in front and one in back
It is arranged in the test section end pipeline of experimental channel, and with poly- four between flange contact facings and two annular measurement apparatus contact surfaces
PVF pad is sealed.
Based on the above-mentioned batching interface test experience device based on electrical conductivity, the present invention also provides a kind of based on electrical conductivity
Batching interface test experience method, comprises the following steps：
1) some conducting probes 22 to different length are made.
As shown in figure 5, the preparation method of conducting probe is comprised the following steps：
1. the concrete model of syringe needle 221 and the diameter of platinum filament 222 are determined according to requirement of experiment, and by syringe
Syringe needle 221 and platinum filament 222 are cut to required length, and are polished using abrasive machine, make otch smooth.
2. polytetrafluoroethylene (PTFE) tubule 223 is cut into required length, and the platinum filament 222 that will be handled well inserts polytetrafluoroethylene (PTFE)
In tubule 223, two ends are reserved one section of platinum filament 222 and are exposed outside pipe respectively, to ensure that the one end of platinum filament 222 can be connected with data wire,
The other end of platinum filament 222 is contacted with conducting solution.The reserved length of platinum filament 222 in two ends is respectively 1mm and 5mm, i.e. 1mm in the present invention
End contacts with conducting solution, and 5mm ends are connected with data wire.
3. the polytetrafluoroethylene (PTFE) tubule 223 for inserting platinum filament 222 is inserted in ready syringe needle 221.
4. to fill insulant in syringe needle 221, platinum filament 222 is insulated with syringe needle 221.
To ensure not to be mixed into air in filling process, before filling, syringe needle 221 is connected with injection with heat-shrink tube 224
Device 225, heating shrinks heat-shrink tube 224, closely connection syringe needle 221 and syringe 225, now by syringe 225
The insulating materials such as epoxy resin for mixing are slowly pushed into syringe needle 221, until the other end has epoxy resin to overflow, are taken
Lower syringe 225 treats epoxy resin cure.
5. the outer wall coating glass glue of syringe needle 221 is insulated, and the two ends platinum filament reserved in ensureing step 2.
222 is mutually on-insulated, obtains conducting probe 22.
2) conducting probe 22 is demarcated, obtains mixing concentration value and closed with the fitting of the output current value of conducting probe 22
System.
Measuring principle first to conducting probe 22 is simply introduced.In the certain situation of conducting solution composition and temperature
Under, the electrical conductivity of conducting solution is fixed, and the electrical conductivity that medium is measured between two probes of conducting probe 22 can be molten with conduction
The change of liquid concentration and change, and have the relation of determination, such as following formula：
Wherein L is conductance；R is resistance；ρ is resistivity；A is conductor effective area；L is conductor effective length；K is conductance
Rate.Powered electrode can form electric field in conducting solution, and power line is mainly distributed between two electrodes, and conductor effective area A can
With approximate with the electrode effective area in immersion conducting solution.Interelectrode distance is constant, namely conductor effective area and conductor have
Effect length is constant.So the conductance L between the timing the two poles of the earth of conducting solution concentration one is constant.Afterwards, electrode two is remained powered on
The voltage at end is constant, and it can be seen from Ohm's law, the electric current for flowing through electrode is directly proportional to the conductance of two interpolar conducting solutions, i.e.,
From above formula, the output signal of conducting probe 22 is the change that current signal can reflect solution concentration.
The principle of conducting probe measurement conducting solution concentration is that solution conductivity exists necessarily with conducting probe output signal
Relation, it is but also immature for the theory of conducting probe, therefore must be demarcated before, with obtain solution concentration with
The relation of conducting probe output signal.Laboratory experiment is carried out first, corresponding conductance when measuring different conducting solution concentration,
The fit correlation of a conductor fluid concentration and its electrical conductivity is obtained, is obtained when then according to the fit correlation and actual measurement
Conductor fluid actual conductivity, obtain PS convey when conductor fluid concentration.
In the present invention, sequentially-fed experiment is carried out instead of oil product with salt solution and clear water, therefore examine to measure the density of salt solution
The change of concentration during amount sequentially-fed.And certain density salt solution has certain relation with the conductance of salt solution, that is, measure electricity
The mesohalobic electrical conductivity in road reacts the change in concentration of salt solution.
The scaling method of conducting probe 22 is comprised the following steps：1. it is a certain amount of edible to being added in the beaker of a constant volume
Salt, after edible salt dissolves completely, brine density is measured with B；2. two conducting probes 22 are fixed to cardboard with AB glue
On plate, two ends are connected with signal generator 1 and signal processing circuit 3 respectively by holding wire, and handle is fixed with conducting probe 22
Hardboard be placed on beaker, make the tip of conducting probe 22 immersion salt solution；3. the output voltage of setting signal generator 1 is conductance
Probe 22 provides input signal, and signal processing circuit 3 is demodulated to the output signal of conducting probe, and by data collecting card
4 are sent to host computer 5, obtain the current output value under the brine strength；4. hardboard is taken away a certain amount of to being added in beaker
Edible salt, every time with the density that the salt solution is measured after salt, then 3. repeat step measures multi-group data；5. 5 pairs of experiments of host computer
Data are analyzed treatment, obtain the fit correlation of brine strength and conducting probe output current value.
The present invention has carried out multigroup experiment, and following two groups of experimental result datas are respectively saline solution and reach saturation and do not reach
Calibration experiment result (as shown in table 1) in the case of to two kinds of saturation, wherein experimental group 1 configuration salt solution endpoint concentration is
1.260g/mL, the configuration salt solution endpoint concentration of experimental group 2 is 1.334g/mL.
The calibration experiment result data of table 1
Wherein：M0 is the density of clear water, 1.007g/mL；M1 is the density of the salt solution of last time measurement, g/mL；Mx is
The density of any one-shot measurement salt solution, g/mL.
As shown in Figure 6, Figure 7, the output display electric current of dimensionless concentration (mx-m0)/(m1-m0) of salt solution and host computer 5
Value is linear, and understands that salt solution dimensionless concentration is inclined with current output value when salt solution is configured to saturation by second group of data
From the linear relationship line of fitting, that is, fragmentary data when taking low concentration is better than the linearity that complete data is fitted, and it is former
Because because the conductance of salt solution and the concentration of salt solution non-linear relation when salt solution reaches saturation, Another reason is used
The test result of the excessive high hardness influence experiment of running water.
3) after the completion of demarcating, each pair of conducting probe of different length 22 is fixed on annular gasket 21, constitutes two collars
Shape measurement apparatus 2.
In the present invention, it is 12# syringe needles to make the syringe needle used during conducting probe 22, and its external diameter is
1.26mm, internal diameter is 0.9mm.The a diameter of 0.3mm of platinum filament of use.The internal diameter of the annular gasket for using is 26mm, external diameter 46mm,
Thickness is 10mm.The first pair of conducting probe be arranged on by the annular gasket center it is any one diametrically, remaining each pair of conductance
Probe be arranged in parallel with first pair of conducting probe, and its distance setting point with the straight line by die and parallel to probe direction
Not Wei 0.52r, 0.83r, 0.94r, i.e., the distance between each pair conducting probe be respectively 6.5mm, 3.9mm and 1.3mm.It is each to electricity
The sophisticated spacing for leading two conducting probes in probe is 0.4mm (as shown in Figure 4).The purpose for being arranged so as to conducting probe is to survey
Concentration value on buret section not radially, and probe arrangement is in small distance at tube wall, is used to observe the change in concentration of tube wall.
4) two annular measurement apparatus 2 are arranged in the end pipeline of experimental channel test section, and are inputted end with letter
Number generator 1 is connected, and the output signal of signal generator 1 is configured according to requirement of experiment.
It is 10kHz that signal frequency is used in the present invention, and amplitude is the alternating voltage signal of 5V as each pair of conducting probe
Input signal, after signal generator is set on request, each pair of conducting probe with two annular measurement apparatus is connected.Due to this
Four pairs of conducting probes are provided with invention in each annular measurement apparatus, thus the annular measurement apparatus can measure conduit cross-sectional
Four instantaneous electric conductivity values of different measuring points liquid on face.
5) by each pair of output end of conducting probe 22 of two annular measurement apparatus 2 successively with 3, two points of two data processing circuit
The different data collecting card 4 of resolution is connected.
Wherein, positioned at the data collecting card of annular measurement apparatus 2 (direction of oil stream shown in Fig. 3) with low resolution of upstream
It is connected, its detection range is high and precision is low；Annular measurement apparatus 2 positioned at downstream are connected with high-resolution data collecting card,
Its detection range is low and high precision；Two annular measurement apparatus 2 are arranged on pipeline with the use of to expand the model of detection range
Enclose and improve the precision of detection.
6) according to the mixing concentration value and the fit correlation of conducting probe output current value for obtaining, and conductance is visited in experiment
The output current value of pin, just can obtain the different radially corresponding mixing concentration values of tube section in Batch Transportation Pipeline.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all
Can be what is be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded
Outside protection scope of the present invention.
Claims (8)
1. a kind of batching interface test experience device based on electrical conductivity, it is characterised in that：It include a signal generator, two
Be provided with some annular measurement apparatus to conducting probe, two signal processing circuits, two different resolutions data collecting card with
And a host computer；
It is arranged in the pipeline of experimental channel test section end before and after annular measurement apparatus described in two, in annular measurement apparatus described in two
Each pair of input of conducting probe is connected with the signal generator；Each pair of conducting probe is defeated in annular measurement apparatus described in two
Go out end to be connected with signal processing circuit described in two respectively；The signal generator is that each pair of conductance in two annular measurement apparatus is visited
Pin provides input signal, and signal processing circuit described in two is respectively used to each pair of output letter of conducting probe in annular measurement apparatus
Number it is demodulated, obtains reflecting the DC current signal of solution concentration, and is transported to data collecting card described in two；Data described in two
Capture card is respectively used to be modulated demodulation to each road DC current signal for obtaining, and converts thereof into defeated after standard current signal
Being sent to the host computer carries out data processing, storage and shows.
2. a kind of batching interface test experience device based on electrical conductivity as claimed in claim 1, it is characterised in that：The ring
Shape measurement apparatus include an annular gasket and some conducting probes to being fixedly installed on annular gasket；Wherein described in first pair
Conducting probe be fixedly installed on by the annular gasket center it is any diametrically, remaining it is each to the conducting probe respectively with
Depending on first pair of conducting probe be arranged in parallel, and each vertical range to the conducting probe is according to certainty of measurement requirement,
To ensure that measurement obtains the concentration value of different radial directions on tube section；Each outer end to two conducting probes in the conducting probe with
The radial outer edge alignment of the annular gasket, conducting probe described in two it is inner close to but do not contact.
3. a kind of batching interface test experience device based on electrical conductivity as claimed in claim 2, it is characterised in that：The ring
The annular gasket in shape measurement apparatus need to match with the test section end internal diameter of the pipeline of experiment pipeline section.
4. a kind of batching interface test experience device based on electrical conductivity as claimed in claim 2, it is characterised in that：It is described each
Conducting probe is fixedly installed on the annular gasket by epoxide-resin glue.
5. a kind of batching interface test experience device based on electrical conductivity as claimed in claim 1, it is characterised in that：Described in two
Annular measurement apparatus are one in front and one in back arranged on experimental channel end, and the method by four flanges being welded on experimental channel
It is blue to be sealed with teflon gasket and annular measurement apparatus contact surface described in two between.
6. it is a kind of using as Claims 1 to 5 any one described device the batching interface test experience method based on electrical conductivity,
It is characterized in that comprising the following steps：
1) some conducting probes to different length are made；
2) conducting probe is demarcated, obtains the fit correlation of mixing concentration value and conducting probe output current value；
3) after the completion of demarcating, each pair of conducting probe is fixed on annular gasket, constitutes two collar-shaped measurement apparatus；
4) two collar-shaped measurement apparatus are arranged in the end pipeline of experimental channel test section, and are inputted end with signal hair
Raw device is connected, and the output signal of signal generator is configured according to requirement of experiment；
5) it is each pair of output end of conducting probe of two annular measurement apparatus is different from two data processing circuits, two resolution ratio successively
Data collecting card be connected；
6) according to the mixing concentration value and the fit correlation of conducting probe output current value for obtaining, and the output of conducting probe is electric
Flow valuve, obtains the different radially corresponding mixing concentration values of tube section in Batch Transportation Pipeline.
7. a kind of batching interface test experience method based on electrical conductivity as claimed in claim 6, it is characterised in that：The step
It is rapid 1) in, the preparation method of conducting probe is comprised the following steps：
1. the concrete model of syringe needle and the diameter of platinum filament are determined according to requirement of experiment, and by syringe needle and platinum filament
Cut to required length, and polished using abrasive machine, make otch smooth；
2. polytetrafluoroethylene (PTFE) tubule is cut into required length, and the platinum filament insertion polytetrafluoroethylene (PTFE) tubule that will be handled well, two
One section of platinum filament is reserved at end respectively, and to expose pipe outer, to ensure that one end platinum filament can be connected with data wire, other end platinum filament can with lead
Electric solution contact；
3. the polytetrafluoroethylene (PTFE) tubule that platinum filament will be inserted is inserted in ready syringe needle；
4. to fill insulant in syringe needle, platinum filament is insulated with syringe needle；
5. syringe needle outer wall coating glass glue is insulated, and the two ends platinum filament reserved in ensureing step 2. is mutually without cease
Edge, obtains conducting probe.
8. a kind of batching interface test experience method based on electrical conductivity as claimed in claim 6, it is characterised in that：The step
It is rapid 2) in, the method demarcated to conducting probe is comprised the following steps：
1. to a certain amount of edible salt is added in the beaker of a constant volume, after edible salt dissolves completely, salt is measured with B
Water density；
2. two conducting probes are fixed on hardboard with AB glue, two ends by holding wire respectively with signal generator and signal
Process circuit is connected, and the hardboard for being fixed with conducting probe is placed on beaker, makes the tip immersion salt solution of conducting probe；
3. the output voltage of setting signal generator provides input signal for conducting probe, and signal processing circuit is to conducting probe
Output signal is demodulated, and is sent to host computer by data collecting card, obtains the current output value under the brine strength；
4. hardboard is taken away to a certain amount of edible salt is gradually added in beaker, every time with the density that the salt solution is measured after salt, weight
3. multiple step measures multi-group data；
5. host computer is analyzed treatment to experimental data, obtains the fitting of different brine strengths and conducting probe output current value
Relation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710148892.3A CN106932444B (en) | 2017-03-14 | 2017-03-14 | A kind of batching interface test experience device and experimental method based on conductivity |
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| CN201710148892.3A CN106932444B (en) | 2017-03-14 | 2017-03-14 | A kind of batching interface test experience device and experimental method based on conductivity |
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| Publication Number | Publication Date |
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| CN106932444A true CN106932444A (en) | 2017-07-07 |
| CN106932444B CN106932444B (en) | 2019-10-18 |
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| CN201710148892.3A Active CN106932444B (en) | 2017-03-14 | 2017-03-14 | A kind of batching interface test experience device and experimental method based on conductivity |
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