CN101975737B - Instrument for movably detecting potassium concentration in brine and detection method - Google Patents
Instrument for movably detecting potassium concentration in brine and detection method Download PDFInfo
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Abstract
The invention discloses an instrument for movably detecting potassium concentration in brine and a detection method. A bismuth germanium oxide (BGO) crystal, a photomultiplier and a plastic scintillator are arranged in a shell of the instrument for movably detecting the potassium concentration in the brine, wherein the plastic scintillator is connected with an organic glass light guide; a liftinghandle is arranged on the upper side of the shell; the lower end of the lifting handle is provided with a tension sensor; and the shell is provided with a power switch, an empty state measurement button, a brine measurement button and a liquid crystal display screen. The plastic scintillator has a cylindrical shape, so the sensitivity of gamma ray is reduced; and the outer surface of the BGO crystal is provided with a lead shield, so the influence of high-energy ray of universe and an environmental radiating background on the measurement is reduced and the measurement accuracy is improved. In the detection method, the brine is added into a measurement groove after the empty state data is measured by the instrument, pulse signals of 1.46MeV gamma rays received by the BGO crystal and pulse signals of beta rays received by the plastic scintillator are accumulated; the pulse signals of tension born by the tension sensor are accumulated; and the data is extracted by the central information processing module and calculated according to a formula shown in the specification.
Description
Technical field
The present invention relates to a kind of measuring instrument and detection method of potassium concn, relate to the instrument and the radiation meter quantity measuring method of potassium concn in a kind of portable portable fast detecting bittern specifically.
Background technology
Produce in the process of potash fertilizer at salt lake bittern; At first need be to the lake water solar evaporation simmer down to potassium concn bittern within the specific limits in the concentration basin; Therefore can carry out the potassium concn of the bittern in the concentration basin regularly or irregularly detecting; To enhancing productivity, energy efficient has great importance.
In addition, behind the extraction desalination water, the remainder salt concentration increases, and is referred to as " strong brine " from seawater.The seawater of present 1 ten thousand stere can output 5 kilosteres desalination water, residue strong brine salt content will exceed one times than common seawater.Strong brine can be used for producing crude salt and uses through refining again, and remaining bittern partly also can be used further to extract elements such as potassium, magnesium, and these compositions can be used as the raw material of chemical fertilizer and are applied to agricultural.Present China is one city, Qingdao only, and the scale of desalinization in 2010 just reaches ten thousand stere every days 180,000 to 20, will reach ten thousand stere every days 350,000 to 40 to the year two thousand twenty desalinization scale.
Therefore, the bittern potassium concn in the bittern development and use process is detected, have great significance.
But mostly the method for potassium concn is gravimetric method, volumetric method or analyzes with instrument such as ion-selective electrode, atomic absorption in the analysis bittern at present commonly used; These modes just can be analyzed after all need taking back the laboratory to the bittern sampling; Formality is loaded down with trivial details; The time that obtains as a result is long, can not satisfy the real-time monitoring to potassium concn in the bittern.
Still do not have at present a kind of portable, can portable fast detecting bittern in the instrument of potassium concn.
Summary of the invention
To the instrument of potassium concn in the existing bittern and the defective that detection method exists, the instrument and the detection method of potassium concn in the detection bittern that the present invention provides a kind of and is easy to carry, detection speed is fast, accuracy of detection is high.
Solving the problems of the technologies described above the concrete technical measures of being taked is: a kind of portable instrument that detects potassium concn in the bittern is characterized in that:
Have groove (2) on housing (1) top, on the wall of groove (2), be shaped on spout hole (8), be equipped with BGO crystal (3) in groove (2) below; Below in BGO crystal (3) is equipped with first photomultiplier (4), in the outside of BGO crystal (3) with first photomultiplier (4); The cylindric plumbous matter shielding (18) of one end sealing is housed; In the wall of groove (2), be shaped on and be cavity cylindraceous, be built-in with cylindrical plastic scintillator (5), connect organic glass light guides (6) in the lower end of plastic scintillant (5) at cavity around groove; The lower end of organic glass photoconduction (6) connects second photomultiplier (7); The handle (9) that band is linked up with is equipped with in top in housing (1), in handle (9) lower end first pulling force sensor (10) and second pulling force sensor (11) is housed; The lower end of first pulling force sensor (10) and second pulling force sensor (11) is connected with housing (1); In housing (1), be positioned at the below of shielding (18), appliance circuit (12) and battery (13) are housed, power switch (14), empty state measurement button (15), bittern measurement button (16) and LCDs (17) are housed on the outer wall of housing (1).
Use above-mentioned instrument to detect the detection method of potassium concn in the bittern, it is characterized in that:
Portable appliance handle (9), or the hook of handle (9) hung on a fixed position, instrument is sagging naturally; Press power switch (14), instrument is started working, and presses empty state and measures button (15), and the clock module of appliance circuit (12) picks up counting.When timing began, the gamma-ray pulse signal of 1.46MeV that first photomultiplier (4) signal processing module begins corresponding BGO crystal (3) is received carried out stored count; The pulse signal of the β ray number that second photomultiplier (7) signal processing module begins corresponding plastic scintillant (5) is received carries out stored count; First pulling force sensor (10) signal processing module begins reflecting that first pulling force sensor (10) bears the big or small pulse signal of pulling force and carries out stored count; Second pulling force sensor (11) signal processing module begins reflecting that second pulling force sensor (11) bears the big or small pulse signal of pulling force and carries out stored count; When timing time reached predefined Measuring Time, first photomultiplier (4) signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal (3) is received and count results N0 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that second photomultiplier (7) signal processing module stops corresponding plastic scintillant (5) is received also is transported to data memory module with count results M0 and preserves; First pulling force sensor (10) signal processing module stops to preserve reflecting that first pulling force sensor (10) bears the pulse signal accumulative total of pulling force size and count results T10 is transported to data memory module; Second pulling force sensor (11) signal processing module stops to preserve reflecting that second pulling force sensor (11) bears the pulse signal accumulative total of pulling force size and count results T20 is transported to data memory module; The LCDs driver module control LCDs (17) of appliance circuit (12) demonstrates the information that the empty state measurement finishes.
Dip bittern with any vessel, inject the groove (2) of instrument.After injecting certain volume; Unnecessary bittern will be drained from spout hole (8); Press bittern and measure button (16); The clock module of appliance circuit (12) picks up counting, and when timing began, the gamma-ray pulse signal of 1.46MeV that first photomultiplier (4) signal processing module restarts corresponding BGO crystal (3) is received carried out stored count; The pulse signal of the β ray number that second photomultiplier (7) signal processing module restarts corresponding plastic scintillant (5) is received carries out stored count; First pulling force sensor (10) signal processing module restarts reflecting that first pulling force sensor (10) bears the big or small pulse signal of pulling force and carries out stored count; Second pulling force sensor (11) signal processing module restarts reflecting that second pulling force sensor (11) bears the big or small pulse signal of pulling force and carries out stored count; When timing time reached predefined Measuring Time, first photomultiplier (4) signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal (3) is received and count results N1 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that second photomultiplier (7) signal processing module stops corresponding plastic scintillant (5) is received also is transported to data memory module with count results M1 and preserves; First pulling force sensor (10) signal processing module stops to preserve reflecting that first pulling force sensor (10) bears the pulse signal accumulative total of pulling force size and count results T11 is transported to data memory module; Second pulling force sensor (11) signal processing module stops to preserve reflecting that second pulling force sensor (11) bears the pulse signal accumulative total of pulling force size and count results T21 is transported to data memory module.
The central information processing module is extracted the data in the data memory module, according to the concentration g/kg of potassium element in the computes bittern:
Wherein:
N＝N1-N0；M＝M1-M0；T1＝T11-T10；T2＝T21-T20；
In the formula: P is the concentration of potassium in the bittern; N0 is that the BGO crystal receives the gamma-ray counting that energy is 1.46MeV under the corresponding empty state; N1 receives the gamma-ray counting that energy is 1.46MeV for BGO crystal under the corresponding measurement bittern state; M0 is that plastic scintillant receives Beta-ray counting under the corresponding empty state; M1 receives Beta-ray counting for plastic scintillant under the corresponding measurement bittern state; T10 is the counting of first pulling force that pulling force sensor bears under the corresponding empty state; T20 is the counting of second pulling force that pulling force sensor bears under the corresponding empty state; T11 is the corresponding counting of measuring first pulling force that pulling force sensor bears under the bittern state; T21 is the corresponding counting of measuring second pulling force that pulling force sensor bears under the bittern state; A, B, C, D, E, F, G, H, I, J, K, L are the undetermined coefficient of formula, can adopt conventional nonlinear regression and fitting to obtain through a large amount of samplings.
The LCDs driver module of appliance circuit (12) control LCDs (17) demonstrates the information that The ultimate results and measurement finish.
Beneficial effect of the present invention: because occurring in nature exists a large amount of high energy cosmic rayss and environmental radiation background, these all can bring interference to independent gamma-rays or β ray detection, influence measuring accuracy.
The present invention then adopt the sample-out count of at first measuring under the empty state and in last calculating with the way of it deduction, eliminated high energy cosmic rays and environmental radiation background to measuring the influence that is brought.
And the measuring method that the present invention adopted is to measure β ray and the gamma-rays that the K-40 decay radiation goes out simultaneously; In computation process; The counting of two kinds of rays is revised each other, is compensated; Feasible measurement is more comprehensive, and wherein certain ray and the deficiency of the measurement one-sidedness that causes have reduced when environment changes, possibly bring the caused measuring error of larger interference to certain ray to have remedied a single-measurement.
In addition; The present invention has fully taken into account under field conditions (factors); The density of bittern can change with the variation of external environmental condition (such as temperature); Participate in the final calculating through each measurement equal volume bittern sample and with the weight of bittern sample and to go, revised bittern density and changed the error that measurement is brought.Specifically, to be present in volume respectively identical but in the bittern that density is different the time, the potassium concn of two kinds of liquid (g/kg) is different when the potassium atom of equal number, but detector can detected K-40 the β ray but be identical with gamma-ray number.And in measurement, taked after the density correction, then avoided this because bittern variable density and error that measurement is brought.
And adopt the teflon material to make instrument housing, and then can better avoid the corrosion of bittern to the instrument surface, prolong the serviceable life of instrument.
The BGO crystal that employing has higher detection efficiency to gamma-rays can reduce the thickness of crystal significantly, simultaneously plastic scintillant is processed cylindric, be looped around the bittern sample around, make that the one-piece construction of instrument is compact more.
Because the range of alpha ray in solid matter generally has only several microns; Can be shielded by instrument housing fully; And it is thin cylindric that plastic scintillant becomes, and makes plastic scintillant reduce greatly gamma-ray susceptibility, and what guaranteed that plastic scintillant receives almost is the β ray all; Reduce incoherent alpha ray and gamma-rays to the interference that measurement brings, improved measuring accuracy.
Be provided with plumbous matter shielding in the outside of the BGO crystal and first photomultiplier, can reduce the influence of universe high-energy ray and environmental radiation background well, make gamma-rays that the BGO crystal receives mainly from the bittern of surveying cavity the place ahead to measuring.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the profile synoptic diagram of organic glass photoconduction among the present invention.
Among the figure: 1 instrument housing, 2 grooves, 3BGO crystal, 4 first photomultipliers, 5 plastic scintillants; 6 organic glass photoconductions, 7 second photomultipliers, 8 spout holes, 9 handles, 10 first pulling force sensors; 11 second pulling force sensors, 12 appliance circuits, 13 batteries, 14 power switches; 15 empty states are measured button, and 16 bittern are measured button, 17 LCDs, 18 plumbous matter shieldings.
Embodiment
Be described with reference to the accompanying drawings instrument structure of the present invention and method of application.
At present, the isotope that metallic potassium has been found one has 25 kinds of isotopes from K-32 to K-55, but the potassium that exists under field conditions (factors) has three kinds of isotopes, is respectively K-39, K-40, K-41.Wherein K-39 and K-41 are stable isotope, do not have radioactivity.K-40 then is non-stable isotope, and can radiate continuum β ray and the energy that highest energy is 1.33MeV through decay is the gamma-rays of 1.46MeV.And the abundance of K-40 in natural potassium is 0.012%, is a constant amount.What of K-40 in the bittern we can be through measuring like this, and then infer that the concentration of potassium element in the bittern comes.
The instrument of potassium concn is as shown in Figure 1 in a kind of portable detection bittern:
Instrument housing 1 adopts teflon to process, and is whole cylindrical.At the top of housing, be shaped on a cylinder shape groove 2, the internal volume of groove 2 is that diameter 10cm, the degree of depth are 13cm.Apart from the place of instrument housing top 1.5cm, having a diameter is the spout hole 8 of 1cm on the wall of groove 2.
Below enclosure interior groove 2, be equipped with the BGO crystal 3, the diameter of BGO crystal 3 is 10cm, thickness is 5cm.Below the BGO crystal 3, be equipped with first photomultiplier 4, between first photomultiplier 4 and BGO crystal 3, scribble optics silicone oil and close proximity.In the periphery of BGO crystal 3, first photomultiplier 4,, be enclosed with reflective (or white diffuse) film of minute surface and black shading film from inside to outside successively according to usual manner.
The outside at BGO crystal 3, first photomultiplier 4; The thick plumbous matter shielding 18 of 3mm is installed; This lead matter shielding is the cylindric of end sealing, and except the BGO crystal 3 opened wide over against the direction of groove 2, plumbous matter shielding 18 wrapped the BGO crystal 3 and first photomultiplier 4 fully.
At the lower position of spout hole 8, in the wall of groove 2, be shaped on and be cavity cylindraceous around groove; Within cavity, be equipped with plastic scintillant 5, plastic scintillant 5 is solidified into cylindrical shape through the technology of casting, and barrel bore is that 11cm, thickness are that 10mm, length are 10cm, is embedded in enclosure interior around groove 2.Be connected to organic glass photoconduction 6 in the lower end of plastic scintillant, as shown in Figure 2, it is circular that the upper end of organic glass photoconduction 6 becomes, and its internal diameter, thickness are identical with internal diameter, the thickness of plastic scintillant; It is cylindric that the lower end of organic glass photoconduction 6 becomes, and radius is 13mm, and is identical with the radius of second photomultiplier 7.The lower end of organic glass photoconduction 6 is connected to second photomultiplier 7.Between plastic scintillant 5 and organic glass photoconduction 6, scribble optics silicone oil and closely contact.Between organic glass photoconduction 6 and second photomultiplier 7, scribble optics silicone oil and closely contact.In the periphery of plastic scintillant 5, organic glass photoconduction 6, second photomultiplier 7,, be enclosed with reflective (or white diffuse) film of minute surface and black shading film from inside to outside successively according to usual manner.
Above housing 1, the handle 9 of a band hook is arranged, link to each other with housing 1 through first pulling force sensor 10, second pulling force sensor 11.
In housing 1; Be positioned at the below of shielding 18; Appliance circuit 12 and battery 13 are housed, and appliance circuit 12 is made up of following electronic unit functional module: power module, clock module, the first photomultiplier tube signal processing module, the second photomultiplier tube signal processing module, the first pulling force sensor signal processing module, the second pulling force sensor signal processing module, data memory module, central information processing module and LCDs driver module.The concrete function that each module can realize as required, the personage designs and produces in the industry that associated electrical gains knowledge by having.
On the outer wall of the location on the lower side of housing 1, be equipped with that power switch 14, empty state are measured button 15, bittern is measured button 16 and LCDs 17.
The principle of work of this instrument is:
The gamma-rays that K-40 radiated in the bittern is received by the BGO crystal, makes the BGO crystal be excited to produce fluorescence; This fluorescence is through finally being received by first photomultiplier after the repeatedly reflection of reflective film and it being converted into electric signal; Under the effect of this electric signal through the first photomultiplier tube signal processing module in the appliance circuit; The amplitude that finally is converted into becomes the pulse signal of certain linear relationship with the incident energy of; And by to be screened out wherein corresponding energy be the gamma-ray pulse signal of 1.46MeV, carry out stored count.
The β ray that K-40 radiated in the bittern is received by plastic scintillant, plastic scintillant is excited and produces fluorescence; This fluorescence is finally received and is converted into electric signal by second photomultiplier through the guiding and the reflex of organic glass photoconduction and reflective film; Under the effect through the second photomultiplier tube signal processing module in appliance circuit of this electric signal, finally be converted into pulse signal and carry out stored count, what of β ray number that plastic scintillant receives what of this counting reflected.
First pulling force sensor is converted into voltage signal output with the pulling force that receives; Effect through the first pulling force sensor signal processing module in the appliance circuit; The voltage/frequency translation circuit of this voltage signal through routine is converted into frequency and the proportional pulse signal of voltage, and carries out stored count.
Second pulling force sensor is converted into voltage signal output with the pulling force that receives; Effect through the second pulling force sensor signal processing module in the appliance circuit; The voltage/frequency translation circuit of this voltage signal through routine is converted into frequency and the proportional pulse signal of voltage, and carries out stored count.
Use above-mentioned instrument to detect the detection method of potassium concn in the bittern:
Through portable, or the hook of the handle 9 of instrument hung on certain fixed position, requirement is that instrument must not have any other contact and stressed except that hook.Instrument is only sagging naturally under action of gravity.
Press power switch 14, instrument is started working.
Press empty state and measure button 15, the clock module of appliance circuit picks up counting.When timing began, the gamma-ray pulse signal of 1.46MeV that the first photomultiplier tube signal processing module begins corresponding BGO crystal 3 is received carried out stored count; The pulse signal of the β ray number that the second photomultiplier tube signal processing module begins corresponding plastic scintillant 5 is received carries out stored count; The first pulling force sensor signal processing module begins reflecting that first pulling force sensor 10 bears the big or small pulse signal of pulling force and carries out stored count; The second pulling force sensor signal processing module begins reflecting that second pulling force sensor 11 bears the big or small pulse signal of pulling force and carries out stored count.
When timing time reached predefined Measuring Time, the first photomultiplier tube signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal 3 is received and count results N0 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that the second photomultiplier tube signal processing module stops corresponding plastic scintillant 5 is received also is transported to data memory module with count results M0 and preserves; The first pulling force sensor signal processing module stops to preserve reflecting that first pulling force sensor 10 bears the pulse signal accumulative total of pulling force size and count results T10 is transported to data memory module; The second pulling force sensor signal processing module stops to preserve reflecting that second pulling force sensor 11 bears the pulse signal accumulative total of pulling force size and count results T20 is transported to data memory module.
The LCDs driver module control LCDs 17 of appliance circuit demonstrates the information that the empty state measurement finishes.Available then any vessel dips bittern, injects the groove 2 of instrument.After injecting certain volume, unnecessary bittern will be drained from spout hole 8, guarantees that the volume of the each bittern sample of measuring of this instrument all is certain.
Press bittern and measure button 16, the clock module of appliance circuit picks up counting.When timing began, the gamma-ray pulse signal of 1.46MeV that the first photomultiplier tube signal processing module restarts corresponding BGO crystal 3 is received carried out stored count; The pulse signal of the β ray number that the second photomultiplier tube signal processing module restarts corresponding plastic scintillant 5 is received carries out stored count; The first pulling force sensor signal processing module restarts reflecting that first pulling force sensor 10 bears the big or small pulse signal of pulling force and carries out stored count; The second pulling force sensor signal processing module restarts reflecting that second pulling force sensor 11 bears the big or small pulse signal of pulling force and carries out stored count.
When timing time reached predefined Measuring Time, the first photomultiplier tube signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal 3 is received and count results N1 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that the second photomultiplier tube signal processing module stops corresponding plastic scintillant 5 is received also is transported to data memory module with count results M1 and preserves; The first pulling force sensor signal processing module stops to preserve reflecting that first pulling force sensor 10 bears the pulse signal accumulative total of pulling force size and count results T11 is transported to data memory module; The second pulling force sensor signal processing module stops to preserve reflecting that second pulling force sensor 11 bears the pulse signal accumulative total of pulling force size and count results T21 is transported to data memory module;
The central information processing module is extracted the data in the data memory module, according to the concentration g/kg of potassium element in the computes bittern:
Wherein:
N＝N1-N0；M＝M1-M0；T1＝T11-T10；T2＝T21-T20；
In the formula: P is the concentration of potassium in the bittern; N0 is that the BGO crystal receives the gamma-ray counting that energy is 1.46MeV under the corresponding empty state; N1 receives the gamma-ray counting that energy is 1.46MeV for BGO crystal under the corresponding measurement bittern state; M0 is that plastic scintillant receives Beta-ray counting under the corresponding empty state; M1 receives Beta-ray counting for plastic scintillant under the corresponding measurement bittern state; T10 is the counting of first pulling force that pulling force sensor bears under the corresponding empty state; T20 is the counting of second pulling force that pulling force sensor bears under the corresponding empty state; T11 is the corresponding counting of measuring first pulling force that pulling force sensor bears under the bittern state; T21 is the corresponding counting of measuring second pulling force that pulling force sensor bears under the bittern state; A, B, C, D, E, F, G, H, I, J, K, L are the undetermined coefficient of formula, can adopt conventional nonlinear regression and fitting to obtain through a large amount of samplings.
The LCDs driver module of appliance circuit control LCDs 17 demonstrates the information that The ultimate results and measurement finish.
Application example:
The CR165 that first photomultiplier adopts Beijing Hamamatsu Technology Co., Ltd. to produce; The CR185 that second photomultiplier adopts Beijing Hamamatsu Technology Co., Ltd. to produce; Battery adopts rechargeable lithium battary.
BGO crystal, plastic scintillant, organic glass photoconduction, appliance circuit are customized as requested by each professional production producer.
Can satisfy the design's required pressure sensor, power switch, the corresponding button, for directly from purchasing ready-made conventional products on the market.
Measuring Time is set at 3 minutes.
Through the bittern sample of a large amount of known wherein potassium concns is demarcated, through the nonlinear regression and fitting algorithm, it is following to obtain related coefficient:
A＝0.1324
B＝0.0997
C＝-1.0365
D＝12.3870
E＝-0.6529
F＝0.0027
G＝0.0728
H＝0.0879
I＝-0.1736
J＝1.7324
K＝1.5728
L＝-3.7298。
Claims (2)
1. portable instrument that detects potassium concn in the bittern is characterized in that:
Have groove (2) on housing (1) top, on the wall of groove (2), be shaped on spout hole (8), be equipped with BGO crystal (3) in groove (2) below; Below in BGO crystal (3) is equipped with first photomultiplier (4), in the outside of BGO crystal (3) with first photomultiplier (4); The cylindric plumbous matter shielding (18) of one end sealing is housed; In the wall of groove (2), be shaped on and be cavity cylindraceous, be built-in with cylindrical plastic scintillator (5), connect organic glass light guides (6) in the lower end of plastic scintillant (5) at cavity around groove; The lower end of organic glass photoconduction (6) connects second photomultiplier (7); The handle (9) that band is linked up with is equipped with in top in housing (1), in handle (9) lower end first pulling force sensor (10) and second pulling force sensor (11) is housed; The lower end of first pulling force sensor (10) and second pulling force sensor (11) is connected with housing (1); In housing (1), be positioned at the below of shielding (18), appliance circuit (12) and battery (13) are housed, power switch (14), empty state measurement button (15), bittern measurement button (16) and LCDs (17) are housed on the outer wall of housing (1).
2. use a kind of portable instrument that detects potassium concn in the bittern of claim 1, detect the detection method of potassium concn in the bittern, it is characterized in that:
Portable appliance handle (9), or the hook of handle (9) hung on a fixed position, instrument is sagging naturally; Press power switch (14), instrument is started working, and presses empty state and measures button (15), and the clock module of appliance circuit (12) picks up counting; When timing began, the gamma-ray pulse signal of 1.46MeV that first photomultiplier (4) signal processing module begins corresponding BGO crystal (3) is received carried out stored count; The pulse signal of the β ray number that second photomultiplier (7) signal processing module begins corresponding plastic scintillant (5) is received carries out stored count; First pulling force sensor (10) signal processing module begins reflecting that first pulling force sensor (10) bears the big or small pulse signal of pulling force and carries out stored count; Second pulling force sensor (11) signal processing module begins reflecting that second pulling force sensor (11) bears the big or small pulse signal of pulling force and carries out stored count; When timing time reached predefined Measuring Time, first photomultiplier (4) signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal (3) is received and count results N0 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that second photomultiplier (7) signal processing module stops corresponding plastic scintillant (5) is received also is transported to data memory module with count results M0 and preserves; First pulling force sensor (10) signal processing module stops to preserve reflecting that first pulling force sensor (10) bears the pulse signal accumulative total of pulling force size and count results T10 is transported to data memory module; Second pulling force sensor (11) signal processing module stops to preserve reflecting that second pulling force sensor (11) bears the pulse signal accumulative total of pulling force size and count results T20 is transported to data memory module; The LCDs driver module control LCDs (17) of appliance circuit (12) demonstrates the information that the empty state measurement finishes;
Dip bittern with any vessel, inject the groove (2) of instrument; After injecting certain volume; Unnecessary bittern will be drained from spout hole (8); Press bittern and measure button (16); The clock module of appliance circuit (12) picks up counting, and when timing began, the gamma-ray pulse signal of 1.46MeV that first photomultiplier (4) signal processing module restarts corresponding BGO crystal (3) is received carried out stored count; The pulse signal of the β ray number that second photomultiplier (7) signal processing module restarts corresponding plastic scintillant (5) is received carries out stored count; First pulling force sensor (10) signal processing module restarts reflecting that first pulling force sensor (10) bears the big or small pulse signal of pulling force and carries out stored count; Second pulling force sensor (11) signal processing module restarts reflecting that second pulling force sensor (11) bears the big or small pulse signal of pulling force and carries out stored count; When timing time reached predefined Measuring Time, first photomultiplier (4) signal processing module stopped the gamma-ray pulse signal accumulative total of 1.46MeV that corresponding BGO crystal (3) is received and count results N1 is transported to data memory module preserving; The pulse signal accumulative total of the β ray number that second photomultiplier (7) signal processing module stops corresponding plastic scintillant (5) is received also is transported to data memory module with count results M1 and preserves; First pulling force sensor (10) signal processing module stops to preserve reflecting that first pulling force sensor (10) bears the pulse signal accumulative total of pulling force size and count results T11 is transported to data memory module; Second pulling force sensor (11) signal processing module stops to preserve reflecting that second pulling force sensor (11) bears the pulse signal accumulative total of pulling force size and count results T21 is transported to data memory module;
The central information processing module is extracted the data in the data memory module, according to the concentration g/kg of potassium element in the computes bittern:
Wherein:
N＝N1-N0；M＝M1-M0；T1＝T11-T10；T2＝T21-T20；
In the formula: P is the concentration of potassium in the bittern; N0 is that the BGO crystal receives the gamma-ray counting that energy is 1.46MeV under the corresponding empty state; N1 receives the gamma-ray counting that energy is 1.46MeV for BGO crystal under the corresponding measurement bittern state; M0 is that plastic scintillant receives Beta-ray counting under the corresponding empty state; M1 receives Beta-ray counting for plastic scintillant under the corresponding measurement bittern state; T10 is the counting of first pulling force that pulling force sensor bears under the corresponding empty state; T20 is the counting of second pulling force that pulling force sensor bears under the corresponding empty state; T11 is the corresponding counting of measuring first pulling force that pulling force sensor bears under the bittern state; T21 is the corresponding counting of measuring second pulling force that pulling force sensor bears under the bittern state; A, B, C, D, E, F, G, H, I, J, K, L are the undetermined coefficient of formula, can adopt conventional nonlinear regression and fitting to obtain through a large amount of samplings;
The LCDs driver module of appliance circuit (12) control LCDs (17) demonstrates the information that The ultimate results and measurement finish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102928030A CN101975737B (en) | 2010-09-27 | 2010-09-27 | Instrument for movably detecting potassium concentration in brine and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102928030A CN101975737B (en) | 2010-09-27 | 2010-09-27 | Instrument for movably detecting potassium concentration in brine and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101975737A CN101975737A (en) | 2011-02-16 |
| CN101975737B true CN101975737B (en) | 2012-05-23 |
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| CN104199080B (en) * | 2014-09-09 | 2017-03-01 | 中国科学院上海应用物理研究所 | Beta-ray detection system and method that a kind of measurement radgass produce |
| CN104406991A (en) * | 2014-12-17 | 2015-03-11 | 中国科学院青海盐湖研究所 | Method for quickly measuring content of potassium ions in liquid samples |
| CN104374793A (en) * | 2014-12-17 | 2015-02-25 | 中国科学院青海盐湖研究所 | Method for quickly measuring content of potassium ions in solid sample |
| CN107957589B (en) * | 2017-11-27 | 2020-05-22 | 中核控制系统工程有限公司 | Lithium glass detector and direct-reading neutron dosimeter applying same |
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| US5483070A (en) * | 1994-08-02 | 1996-01-09 | Packard Instrument Company | Scintillation counter |
| CN201075090Y (en) * | 2007-07-27 | 2008-06-18 | 黑龙江省科学院技术物理研究所 | Instrument for detecting talc powder concentration |
| CN201803934U (en) * | 2010-09-27 | 2011-04-20 | 丹东东方测控技术有限公司 | Mobile instrument for detecting concentration of potassium in brine |
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