CN105116026B - A kind of quinine concentration analysis device and method based on surface acoustic wave series resonator biology tongue - Google Patents
A kind of quinine concentration analysis device and method based on surface acoustic wave series resonator biology tongue Download PDFInfo
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- CN105116026B CN105116026B CN201510067218.3A CN201510067218A CN105116026B CN 105116026 B CN105116026 B CN 105116026B CN 201510067218 A CN201510067218 A CN 201510067218A CN 105116026 B CN105116026 B CN 105116026B
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Abstract
The present invention relates to a kind of quinine concentration analysis device and method based on surface acoustic wave series resonator biology tongue.Solve the problems, such as existing high using concentration analyzer cost.Device includes collecting work platform, collecting unit, converting unit and processing unit, collecting work platform includes pedestal, disk is provided with pedestal, multiple liquid storage cylinders are provided with disk, the side lower part of disk one is provided with drip chamber, drip chamber bottom is provided with liquid droping head, standing groove is provided with the lower section pedestal of liquid droping head, collecting unit includes cell battery lead plate and SAW resonator, cell battery lead plate is located in standing groove, SAW resonator is connected with converting unit, and converting unit is connected with processing unit.It is an advantage of the invention that a variety of solution concentrations can be detected by simple in construction, low manufacture cost automatically, it is easy to operate, while reduce operating personnel's workload, save the time.Detection process is convenient and swift, and precision is high.
Description
Technical Field
The invention relates to a solution concentration detection technology, in particular to a quinine concentration analysis device based on a surface acoustic wave series resonator biological tongue and a quinine concentration analysis method based on the surface acoustic wave series resonator biological tongue.
Background
The concentration of the solution is often required to be detected in a laboratory, and when the concentration of the solution is detected, a special concentration analyzer is usually used for detection, but the concentration analyzer is expensive, and less concentration analyzers need ten thousands of yuan, which greatly increases the experiment cost. Therefore, it is necessary to design a concentration detection device with simple structure, quick operation and low cost, and a detection method of the detection device.
Disclosure of Invention
The invention mainly solves the problem of high cost of a concentration analyzer in the prior art, and provides a quinine concentration analyzing device based on a surface acoustic wave series resonator biological tongue, which has the advantages of simple structure, quick operation and low cost.
The invention also provides a quinine concentration analysis method based on the surface acoustic wave series resonator biological tongue, which is rapid to operate.
The technical problem of the invention is mainly solved by the following technical scheme: the utility model provides a quinine concentration analytical equipment based on biological tongue of surface acoustic wave series resonator, includes acquisition work platform, acquisition unit, conversion unit and processing unit, acquisition work platform includes the pedestal, and the rotation is provided with the disc on the pedestal, is provided with a plurality of stock solution chambeies around the centre of a circle on the disc, is provided with the drip chamber in disc one side lower part, drip chamber upper portion contacts with the disc bottom, is provided with the liquid outlet bottom the stock solution chamber, is provided with first solenoid valve on the liquid outlet, corresponds the liquid outlet position at the drip chamber top and is provided with the inlet, be provided with the drip head on the drip chamber bottom, be provided with wiper mechanism and drainage mechanism in the drip chamber, be provided with the standing groove on the below pedestal of drip head, the acquisition unit is including the cell electrode board surface acoustic wave resonator that is connected, and the cell electrode board is located in the standing groove, the surface acoustic wave resonator is connected with the conversion unit, and the conversion unit is connected with the processing unit. The acquisition workbench automatically and respectively drops solutions with different concentrations onto the cell electrode plate for detection, the surface acoustic wave resonator acquires reaction information on the cell electrode plate and outputs the reaction information to the conversion unit in a frequency form, the conversion unit acquires frequency signals of the surface acoustic wave resonator, converts the frequency signals into digital signals and sends the digital signals to the processing unit, and the processing unit performs resonance processing on the digital signals to obtain an output signal-to-noise ratio. And after detecting the solutions with different concentrations, obtaining output signal-to-noise ratios respectively corresponding to the N digital signals, and then obtaining a solution concentration prediction model according to the fitted straight line. The disc can be placed with solutions with various concentrations, and the disc rotates at intervals according to the setting and adds the solution in one liquid storage cavity into the dropping liquid chamber. The drip chamber drips the solution onto the cell electrode plate, allowing the remaining solution to drain and allowing the drip chamber to be cleaned after the detection of one concentration solution. The invention can automatically analyze the concentration of the solution with different concentrations, has simple and convenient operation, does not need operators to always wait aside and manually replace the detection solution, reduces the workload of the operators and saves the time. The drip chamber has a cleaning function, when a solution with one concentration is discharged, the cleaning mechanism can be filled with water for cleaning, and filled with gas for drying, so that a solution with another concentration cannot be mixed with the residual liquid before entering the drip chamber, the concentration of the solution cannot be changed, and the accuracy of final analysis data is ensured.
As a preferred scheme, the cleaning mechanism comprises a water inlet and an air inlet which are communicated with the interior of the drip chamber, the water inlet is connected with the water tank, the air inlet is connected with the air pump, a water inlet electromagnetic valve and an air inlet electromagnetic valve are respectively arranged on the water inlet and the air inlet, the drainage mechanism comprises a drainage outlet arranged at the bottom of the drip chamber, and a drainage electromagnetic valve is arranged on the drainage outlet. The washing mechanism washes the drip chamber. Open the outlet during washing, let in the clear water through the water inlet and carry out the water washing, let in the air through the air inlet after the water washing and dry in the dropping liquid chamber, this makes the solution of adding afterwards can not mix with the residual liquid before for solution concentration can not change, guarantees the accuracy nature of analysis result.
Preferably, the dropping head is communicated with the dropping liquid chamber through a micro pump. The solution in the dropping chamber is dropped on the cell electrode plate according to the set amount and time by a micro pump.
As a preferred scheme, be provided with the rabbling mechanism that adds oxygen in the drip chamber, the rabbling mechanism that adds oxygen includes the pivot, is provided with the pipeline in the pivot, the pivot is linked together with water inlet and air inlet, is connected with the stirred tube in the pivot, and the intermediate position of stirred tube is provided with the pivot seat, and the stirred tube passes through the pivot seat according to in the pivot, constitutes T type structure, and the stirred tube is hollow sealed tube, and the stirred tube is linked together with the pivot, serves at the end of stirred tube to be provided with a plurality of first gas pockets, is provided with a plurality of second gas pockets on the one side that the other end of stirred tube carried on the back with the first gas pocket. Add oxygen rabbling mechanism with the air let in the indoor solution of dropping liquid, increase the oxygen content of solution, let in the air simultaneously and can drive the stirring pipe and rotate, can stir solution for the better mixture of solution and air increases the oxygen content, and the back on the cell plate electrode is dripped to the solution like this, can make the cell on the cell plate electrode survive better, and the life-span of surviving is longer, has guaranteed the accuracy of test data.
Preferably, a one-way valve leading to the stirring pipe is arranged on the pipeline of the rotating shaft. Preventing water and gas from flowing backwards.
Preferably, a working electrode, a counter electrode and two reference electrodes are arranged on the cell electrode plate, the front end of the working electrode is circular, the circular part is made of foam copper, a gold-plated layer is further plated on the foam copper, cells are attached to the front end of the working electrode, the front ends of the counter electrode and the reference electrodes are arranged around the front end of the working electrode, and the outer parts of the front ends of the working electrode, the counter electrode and the reference electrodes are coated with a paint coating. The electrodes are made of foam copper, the foam copper is of a three-dimensional reticular hole structure which is uniformly distributed, the electrodes have a multi-layer stable reticular structure and are tightly connected, and the reticular structure is not easy to deform or collapse. This allows the cells to enter the interior of the copper foam structure, allowing the cells to better adhere to the electrodes. Compared with the copper foam, the gold-plated layer has lower toxicity, and the contact with cells leads to better cell activity and better detection sensitivity.
As a preferable scheme, a rotating motor is vertically arranged on the base, the disc is arranged on a rotating shaft of the rotating motor, a shaft sleeve is arranged outside the rotating shaft of the rotating motor, and the drip chamber is fixed on the shaft sleeve.
A quinine concentration analysis method based on a surface acoustic wave series resonator biological tongue comprises the following steps:
the method comprises the following steps: putting quinine solution into a liquid storage cavity opposite to the drip chamber in the disc, and then injecting the solution in the liquid storage cavity into the drip chamber; the liquid storage cavity is opposite to the drip chamber, namely, the liquid outlet of the liquid storage chamber is aligned with the liquid inlet of the drip chamber.
Step two: dropping liquid on the cell electrode plate by a micro pump, setting the liquid dropping amount of each time to be 0.05ml, setting the liquid dropping interval time to be 3 seconds, setting the liquid dropping frequency to be 150 times, and after the liquid dropping is finished, discharging residual solution in a liquid dropping chamber and cleaning and drying the liquid dropping chamber; and opening the water discharge electromagnetic valve to discharge the residual solution in the dropping liquid chamber, and closing the water discharge electromagnetic valve after discharging. Then open the solenoid valve of intaking and let in clear water, wash in the dropping liquid room, open the drainage solenoid valve again after the washing and carry out the drainage. Closing the water inlet electromagnetic valve, opening the air inlet electromagnetic valve, introducing gas to blow dry the dropping liquid chamber, and finally closing the water drainage electromagnetic valve.
Step three: the acoustic surface wave resonator collects signals on a cell electrode plate and outputs the signals in a frequency form, the conversion unit converts the frequency signals to obtain a frequency curve, then the frequency curve is transmitted to the processing unit, and the processing unit samples the frequency curve to obtain an input value S (t); substituting the input value S (t) into a second-order linear system stochastic resonance model which is:
and making the second order linear coefficient stochastic resonance model resonate; where x (t) is vibration particle displacement, omega is angular frequency, r and omega are respectively set attenuation coefficient and linear vibration particle frequency, c is set signal modulation coefficient, b is set quadratic noise xi 2 Coefficient of (t), xi (t) is three-way noise, xi (t) is epsilon { -a,0, a }, a is more than 0, disproportionation process of noise follows Poisson distribution, and probability distribution is p s (a)＝p s (-a)＝q，p s (0) =1-2q, wherein 0 < q < 0.5; the noise mean and correlation follow [ xi (t) ] =0, [ [ xi (t) ] xi (t + τ) ] =2qa 2 e -λτ (ii) a λ is the correlation rate, and the straightness of the three-branch noise xi (t) isObtaining the output signal-to-noise ratio of the solution
Step four: substituting the output signal-to-noise ratio value into a quinine solution concentration prediction model:
and calculating the concentration of the quinine solution.
As a preferred scheme, the quinine solution concentration prediction model is calculated by the following steps:
step a: respectively preparing quinine solutions with various concentrations, respectively placing the quinine solutions into the liquid storage cavities of the discs, and simultaneously inputting the corresponding concentration value k of each quinine solution into the processor 1 ，k 2 ，...，k N (ii) a And N is the amount of the detection solution.
Step b: injecting the solution in the liquid storage cavity opposite to the drip chamber in the disc into the drip chamber, and obtaining the output signal-to-noise ratio of the solution according to the second step and the third step;
step c: c, rotating the disc to enable the next liquid storage cavity to be opposite to the dripping liquid cavity, repeating the step b until all the solutions on the disc are detected, and finally obtaining the output signal-to-noise ratio SNR corresponding to the solutions by the processor 1 ，SNR 2 ，...，SNR N Then according to the corresponding solution concentration k 1 ，k 2 ，...，k N Using (k) 1 ，SNR 1 )，(k 2 ，SNR 2 )，...，(k N ，SNR N ) Fitting into a straight line, and obtaining a quinine solution concentration prediction model according to the fitted straight line:
therefore, the invention has the advantages that: simple structure, the cost of manufacture is low, can detect multiple solution concentration automatically, and convenient operation is swift, has reduced operating personnel work load simultaneously, the time of having practiced thrift. The detection process is convenient and fast, and the precision is high.
Drawings
FIG. 1 is a block diagram of one construction of the present invention;
FIG. 2 is a schematic structural view of an acquisition station according to the present invention;
FIG. 3 is a schematic structural view of an oxygenating stirring mechanism in the present invention;
FIG. 4 is a schematic diagram of a cell electrode plate according to the present invention.
1-acquisition workbench 2-acquisition unit 3-conversion unit 4-processing unit 5-surface acoustic wave resonator 6-cell electrode plate 7-seat body 8-disc 9-liquid storage cavity 10-drip chamber 11-placement groove 12-liquid outlet 13-liquid outlet electromagnetic valve 14-liquid inlet 15-drip head 16-air inlet 17-air inlet electromagnetic valve 18-water inlet 19-water inlet electromagnetic valve 20-water outlet 21-water discharge electromagnetic valve 22-rotating motor 23-shaft sleeve 24-micro pump 25-rotating shaft 26-stirring pipe 27-rotating shaft seat 28-first air hole 29-second air hole 30-one-way valve 31-working electrode 32-counter electrode 33-reference electrode 34-paint coating
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The embodiment is as follows:
the quinine concentration analysis device based on the surface acoustic wave series resonator biological tongue comprises an acquisition workbench 1, an acquisition unit 2, a conversion unit 3 and a processing unit 4.
As shown in fig. 2, the collecting workbench comprises a base 7, a rotating motor 22 is vertically installed on the base, a disc 8 is arranged on a rotating shaft of the rotating motor, and a shaft sleeve 23 is arranged outside the rotating shaft of the rotating motor. A plurality of liquid storage cavities 9 for containing solution are uniformly arranged on the disc around the circle center, a drip chamber 10 is arranged on the lower portion of one side of the disc, the drip chamber is fixedly connected to the shaft sleeve, and the upper portion of the drip chamber is in contact with the bottom of the disc.
A liquid outlet 12 is arranged at the bottom of the liquid storage cavity, a liquid outlet electromagnetic valve 13 is arranged on the liquid outlet, a liquid inlet 14 is arranged at the upper part of the liquid storage chamber corresponding to the position of the liquid outlet, and the diameter of the liquid inlet is larger than that of the liquid outlet. A drip head 15 is arranged at the bottom of the drip chamber, and a micro pump 24 is arranged on the drip head and communicated with the interior of the drip chamber through the micro pump.
A cleaning mechanism and a drainage mechanism are arranged in the drip chamber, the cleaning mechanism comprises a water inlet 18 and a gas inlet 16, and the gas inlet and the water inlet are converged into a pipeline and then communicated with the interior of the drip chamber. The water inlet is provided with a water inlet electromagnetic valve 19, the water inlet is connected with the water tank through a pipeline, and the pipeline is provided with a water pump. An air inlet electromagnetic valve 17 is arranged on the air inlet, and the air inlet is connected with the air pump. The drain mechanism includes a drain port 20 provided at the bottom of the drip chamber, and a drain solenoid valve 21 is provided at the drain port.
Still be provided with the rabbling mechanism that adds oxygen in the dropping liquid chamber, as shown in fig. 3, the rabbling mechanism that adds oxygen includes pivot 25, is provided with the pipeline in the pivot, and the pipeline is linked together with water inlet and air inlet in the pivot, is connected with stirring pipe 26 in the pivot, and the intermediate position of stirring pipe is provided with pivot seat 27, and the stirring pipe is installed in the pivot through the pivot seat, constitutes T type structure, and the stirring pipe is hollow seal tube, and the stirring pipe is linked together with the pivot. A plurality of first air holes 28 are arranged at one end of the stirring pipe, and a plurality of second air holes 29 are arranged at the other end of the stirring pipe on the side opposite to the first air holes. A one-way valve 30 leading to the stirring pipe is arranged on the pipeline of the rotating shaft.
A placing groove 11 is arranged on the base at the lower part of the liquid dropper, and a water outlet is arranged at the bottom of the placing groove.
The acquisition unit comprises a cell electrode plate 6 and a surface acoustic wave resonator 5, and the cell electrode plate is connected to the surface acoustic wave resonator. During operation, the cell electrode plate is placed in the placing groove of the collecting workbench. As shown in fig. 1, the surface acoustic wave resonator is connected to a conversion unit, which is connected to a processing unit, and a power supply is connected to the surface acoustic wave resonator. As shown in FIG. 4, the cell electrode plate is provided with a working electrode 31, a counter electrode 32 and a reference electrode 33, which are made of copper foam, and a gold plating layer is further plated on the electrodes. The front end of the working electrode is circular, cells attach to the front end of the working electrode, the front ends of the counter and reference electrodes are disposed around the front end of the working electrode, and a paint coating 34 is applied to the outer portions of the front ends of the working, counter and reference electrodes.
A quinine concentration analysis method based on a surface acoustic wave series resonator biological tongue comprises the following steps:
the method comprises the following steps: the quinine solution was placed in the reservoir chamber opposite the drip chamber in the disc, and the solution in the reservoir chamber was then injected into the drip chamber.
Step two: dropping liquid on the cell electrode plate by a micro pump, wherein the liquid dropping amount is set to be 0.05ml each time, the liquid dropping interval time is set to be 3 seconds, and the liquid dropping frequency is set to be 150 times. After the dropping is finished, the water discharging electromagnetic valve is opened to discharge the residual solution in the dropping chamber, and the water discharging electromagnetic valve is closed after the residual solution is discharged. Then the water inlet electromagnetic valve is opened to introduce clear water, the dropping liquid chamber is washed, and the water discharge electromagnetic valve is opened to discharge water after the dropping liquid chamber is washed. Closing the water inlet electromagnetic valve, opening the air inlet electromagnetic valve, introducing gas to blow dry the dropping liquid chamber, and finally closing the water drainage electromagnetic valve.
Step three: the acoustic surface wave resonator collects signals on a cell electrode plate and outputs the signals in a frequency form, the conversion unit converts the frequency signals to obtain a frequency curve, then the frequency curve is transmitted to the processing unit, and the processing unit samples the frequency curve to obtain an input value S (t); substituting the input value S (t) into a second-order linear system stochastic resonance model, which is:
and resonating the second-order linear coefficient stochastic resonance model(ii) a Where x (t) is the vibration particle displacement, omega is the angular frequency, r and omega are the set attenuation coefficient and the frequency of the linear vibration particle respectively, c is the set signal modulation coefficient, b is the set quadratic noise xi 2 Coefficient of (t), xi (t) is three-way noise, xi (t) is epsilon { -a,0, a }, a is more than 0, disproportionation process of noise follows Poisson distribution, and probability distribution is p s (a)＝p s (-a)＝q，p s (0) =1-2q, wherein 0 < q < 0.5; the noise mean and correlation follow [ xi (t) ] =0, [ [ xi (t) ] xi (t + τ) ] =2qa 2 e -λτ (ii) a λ is the correlation rate, and the straightness of the three-branch noise ξ (t) isObtaining the output signal-to-noise ratio of the solution
Step four: substituting the output signal-to-noise ratio value into a quinine solution concentration prediction model:
and calculating the concentration of the quinine solution.
The quinine solution concentration prediction model is calculated by the following steps:
step a: respectively preparing quinine solutions with various concentrations, respectively placing the quinine solutions into the liquid storage cavities of the discs, and simultaneously inputting the corresponding concentration value k of each quinine solution into the processor 1 ，k 2 ，...，k N ；
Step b: injecting the solution in the liquid storage cavity opposite to the drip chamber in the disc into the drip chamber, and obtaining the output signal-to-noise ratio of the solution according to the second step and the third step;
step c: rotating the disc to make the next liquid storage chamber opposite to the drip chamber, repeating step b until all the solution on the disc is detected, and finally obtaining the processorOutput signal-to-noise ratio SNR for these solutions 1 ，SNR 2 ，...，SNR N Then according to the corresponding solution concentration k 1 ，k 2 ，...，k N Using (k) 1 ，SNR 1 )，(k 2 ，SNR 2 )，...，(k N ，SNR N ) Fitting into a straight line, and obtaining a quinine solution concentration prediction model according to the fitted straight line:
the specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms acquisition stage, acquisition unit, conversion unit, processing unit, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (9)
1. A quinine concentration analysis device based on a surface acoustic wave series resonator biological tongue is characterized in that: including gathering workstation (1), acquisition unit (2), conversion unit (3) and processing unit (4), gathering workstation includes base (7), and the rotation is provided with disc (8) on the base erect on base (7) and be provided with rotating electrical machines (22), the disc is installed in rotating electrical machines's pivot, is provided with a plurality of stock solution chambeies (9) around the centre of a circle on the disc, is provided with drip chamber (10) in disc one side lower part, drip chamber upper portion and disc bottom contact are provided with liquid outlet (12) bottom the stock solution chamber, are provided with out liquid solenoid valve (13) on the liquid outlet, correspond the liquid outlet position at the drip chamber top and be provided with inlet (14), be provided with drip head (15) on the drip chamber bottom, be provided with wiper mechanism and drainage mechanism in the drip chamber, be provided with standing groove (11) on the below base of drip head, the acquisition unit is including cell electrode board (6) and surface acoustic wave resonator (5) that are connected, and the cell electrode board is located at the standing groove, the syntonizer is connected with the conversion unit and the processing unit.
2. The device for analyzing the quinine concentration based on the biological tongue of the surface acoustic wave series resonator according to claim 1, wherein the cleaning mechanism comprises a water inlet (18) and an air inlet (16) which are communicated with the interior of the drip chamber, the water inlet is connected with the water tank, the air inlet is connected with the air pump, a water inlet electromagnetic valve (19) and an air inlet electromagnetic valve (17) are respectively arranged on the water inlet and the air inlet, the drainage mechanism comprises a drainage outlet (20) arranged at the bottom of the drip chamber, and a drainage electromagnetic valve (21) is arranged on the drainage outlet.
3. A surface acoustic wave series resonator biological tongue-based quinine concentration analysis device according to claim 1, wherein the dripper (15) is in communication with the drip chamber (10) through a micro-pump (24).
4. The quinine concentration analysis device based on the biological tongue of the surface acoustic wave series resonator as claimed in claim 2, wherein an oxygenation stirring mechanism is arranged in the drip chamber (10), the oxygenation stirring mechanism comprises a rotating shaft (25), a pipeline is arranged in the rotating shaft, the rotating shaft is communicated with the water inlet (18) and the air inlet (16), a stirring pipe (26) is connected to the rotating shaft, a rotating shaft seat (27) is arranged at the middle position of the stirring pipe, the stirring pipe is mounted on the rotating shaft through the rotating shaft seat to form a T-shaped structure, the stirring pipe is a hollow sealing pipe and is communicated with the rotating shaft, a plurality of first air holes (28) are arranged at one end of the stirring pipe, and a plurality of second air holes (29) are arranged at the other end of the stirring pipe and on one side of the first opposite air holes.
5. A quinine concentration analysis device based on surface acoustic wave series resonator biological tongue, according to claim 4, characterized in that a one-way valve (30) leading to the stirring pipe is arranged on the pipeline of the rotating shaft (25).
6. A surface acoustic wave series resonator biological tongue-based quinine concentration analysis device according to claim 1, 2, 3, 4 or 5, wherein a working electrode (31), a counter electrode (32) and two reference electrodes (33) are arranged on the cell electrode plate (6), the front end of the working electrode is round, the round part is made of copper foam, a gold plating layer is further plated on the copper foam, cells are attached to the front end of the working electrode, the front ends of the counter electrode and the reference electrodes are arranged around the front end of the working electrode, and the outer parts of the front ends of the working electrode, the counter electrode and the reference electrodes are coated with a paint coating (34).
7. A quinine concentration analyzing device based on surface acoustic wave series resonator biological tongue as claimed in claim 1 or 2 or 3 or 4 or 5, wherein a shaft sleeve (23) is arranged outside the rotating shaft of the rotating motor, and the drip chamber is fixed on the shaft sleeve.
8. A quinine concentration analysis method based on surface acoustic wave series resonator biological tongue, which adopts the device in any one of claims 1-7, and is characterized by comprising the following steps:
the method comprises the following steps: putting quinine solution into a liquid storage cavity opposite to the drip chamber in the disc, and then injecting the solution in the liquid storage cavity into the drip chamber;
step two: dropping liquid on the cell electrode plate by a micro pump, setting the liquid dropping amount of each time to be 0.05ml, setting the liquid dropping interval time to be 3 seconds, setting the liquid dropping times to be 150 times, and after the liquid dropping is finished, discharging residual solution in the liquid dropping chamber and cleaning and drying the liquid dropping chamber;
step three: the acoustic surface wave resonator collects signals on a cell electrode plate and outputs the signals in a frequency form, the conversion unit converts the frequency signals to obtain a frequency curve, then the frequency curve is transmitted to the processing unit, and the processing unit samples the frequency curve to obtain an input value S (t); substituting the input value S (t) into a second-order linear system stochastic resonance model, which is:
and making the second order linear coefficient stochastic resonance model resonate; where x (t) is the vibration particle displacement, omega is the angular frequency, r and omega are the set attenuation coefficient and the frequency of the linear vibration particle respectively, c is the set signal modulation coefficient, b is the set quadratic noise xi 2 Coefficient of (t), xi (t) is three-way noise, xi (t) is epsilon { -a,0, a }, a > 0, and the disproportionation process of the noise follows Poisson distribution with probability distribution p s (a)＝p s (-a)＝q，p s (0) =1-2q, wherein 0<q<, 0.5; noise mean and correlation follow<ξ(t)>＝0，<ξ(t)ξ(t+τ)>＝2qa 2 e -λτ (ii) a λ is the correlation rate, and the straightness of the three-branch noise ξ (t) isObtaining the output signal-to-noise ratio of the solution
Step four: substituting the output signal-to-noise ratio value into a quinine solution concentration prediction model:
and calculating the concentration of the quinine solution.
9. The method of claim 8, wherein the quinine solution concentration prediction model is calculated by the following steps:
step a: respectively preparing quinine solutions with various concentrations, and respectively placing the quinine solutions on a discSimultaneously inputting the corresponding concentration value k of each quinine solution into the processor 1 ,k 2 ,...,k N ；
Step b: injecting the solution in the liquid storage cavity opposite to the drip chamber in the disc into the drip chamber, and obtaining the output signal-to-noise ratio of the solution according to the second step and the third step;
step c: rotating the disc to enable the next liquid storage cavity to be opposite to the drip chamber, repeating the step b until all the solutions on the disc are detected, and finally obtaining the output signal-to-noise ratio SNR corresponding to the solutions by the processor 1 ,SNR 2 ,...,SNR N Then according to the corresponding solution concentration k 1 ,k 2 ,...,k N Using (k) 1 ,SNR 1 ),(k 2 ,SNR 2 ),...,(k N ,SNR N ) Fitting into a straight line, and obtaining a quinine solution concentration prediction model according to the fitted straight line:
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| CN103412004A (en) * | 2013-08-22 | 2013-11-27 | 浙江工商大学 | Method for detecting storage time of citrus sinensis |
| CN103424468A (en) * | 2013-08-22 | 2013-12-04 | 浙江工商大学 | System and method for detecting adulterated milk by aid of SAWR (surface acoustic wave resonator) |
| CN104089996A (en) * | 2014-01-17 | 2014-10-08 | 浙江工商大学 | Taste cell sensor using surface acoustic wave resonator and preparation method thereof |
| CN204044164U (en) * | 2014-06-23 | 2014-12-24 | 珠海森龙生物科技有限公司 | Mini-clinical biochemical analyzer |
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