CN101823679A - Device for detecting fill quantity of beer on line and method - Google Patents
Device for detecting fill quantity of beer on line and method Download PDFInfo
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- CN101823679A CN101823679A CN201010172122A CN201010172122A CN101823679A CN 101823679 A CN101823679 A CN 101823679A CN 201010172122 A CN201010172122 A CN 201010172122A CN 201010172122 A CN201010172122 A CN 201010172122A CN 101823679 A CN101823679 A CN 101823679A
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Abstract
The invention discloses a device for detecting fill quantity of beer on line and a method thereof. The device comprises an electric field transmitting circuit, a transmitting polar plate, a receiving polar plate, a signal processing circuit, a detection result processing circuit and the like. The transmitting and the receiving polar plates are arranged at two sides of a bottle neck, the electric field transmitting circuit generates a high-frequency sinusoidal signal to be transmitted to the transmitting polar plate. An electric field is formed between the transmitting polar plate and the receiving polar plate. A beer bottle is arranged between the polar plates, the fill quantity of the beer influences the strength of the electric field, and the receiving polar plate and the signal processing circuit judge whether the fill quantity is qualified according to the variation of the electric field. The device realizes the detection way which is harmless to the human body and has rapid detection speed which can reach 72000 bottles per hour. The detection accuracy can reach 99 percent.
Description
Technical field
The present invention relates to the device and method of online detection fill quantity of beer.
Background technology
On present beer production line, be a very important link to the detection of can amount.The can amount all has exacting requirements, if the inferior-quality product of can amount comes into the market, will damage the image of manufacturer, infringement customer's interests, and this must be avoided.
By manually finishing, workman's dullness of working causes visual fatigue easily on the secondary detection of can amount in present domestic most manufacturing enterprises, and the speed of detection and precision are difficult to satisfy the requirement of 36000 bottles/hour, 72000 bottles/hour high-speed production lines.Domestic can amount online detection instrument market is monopolized by Germany and US enterprise basically, costs an arm and a leg.It is significant to develop the fill quantity of beer online detection instrument that has independent intellectual property right, not only can satisfy the urgent need of domestic beer producers to this equipment, improve its competitiveness on the market at home and abroad, and can effectively suppress external like product price.As can amount online detection instrument, also has the possibility of foreign exchange earning with independent intellectual property right.
The external research of having carried out can amount on-line detecting system early.They use various modernized practical techniques such as gamma rays, X ray, machine vision, infrared ray absorbing, super sonic, Application and Development can amount online detection instrument.Its main device fabrication enterprise picture Germany KRONES, German HEUFT, German MIHO and U.S. filtec mainly adopts X ray technology for detection can amount.And domestic minority correlative study unit mainly adopts machine vision to carry out bottle detection of interior can amount, and fill quantity of beer online detection instrument majority only rests on development phase.
Gamma rays, X ray are harmful, and this has just limited their application; Machine Vision Detection scheme cost costliness, image processing techniques are used for the can amount seldom separately and detect, and are used for the bottle checker Equipment Inspection more, and require detection receptacle must have certain light transmission; The accuracy of detection of infrared detection and ultrasonic detection technology is all relative not high.In addition, also have foam after the beer filling capping when detecting for the second time, after foam converts beer to, liquid level is risen to some extent, above technical scheme is difficult the influence of foam is made very accurate compensation deals.
Summary of the invention
For overcoming the deficiencies in the prior art, now by the following technical solutions:
A kind of device of online detection fill quantity of beer, it comprises bonded assembly high-frequency signal source module, high-frequency electric field module, high-frequency signal processing module and intelligent processing module successively; Wherein, described high-frequency electric field module is corresponding with beer bottle to be detected.
Described high-frequency signal processing module comprises bonded assembly oscillator amplifier circuit, integrated amplifier, peak-detector circuit and voltage conversion circuit successively, and described voltage conversion circuit also links to each other with intelligent processing module.
Described intelligent processing module comprises microprocessor, and described microprocessor is connected with A/D modular converter, foam compensating module, human-computer interaction module, rejecting processing module and warning processing module respectively.
Described high-frequency signal source module is the high-frequency signal transmission circuit, and it utilizes the power supply of 12V power supply.
Described high-frequency electric field module is made up of corresponding emission pole plate and reception pole plate, described emission pole plate and reception pole plate are positioned at the 2-3cm place, bottleneck both sides of beer bottle to be detected, and the distance of two-plate is 7-8cm, and the material of two-stage plate is the copper coin of 1mm thickness, be of a size of long 3-5cm, wide 2-3cm.
A kind of method of online detection fill quantity of beer, this method of inspection may further comprise the steps:
Step1: at first the high-frequency signal transmission circuit sends the voltage signal that produces to the emission pole plate;
Step2: the emission pole plate reception pole plate corresponding with it that receives voltage signal formed a high-frequency electric field;
Step3: when container to be detected enters this high-frequency electric field, receive pole plate and will receive the high frequency small-signal;
Step4: the high frequency small-signal is sent into the high-frequency signal treatment circuit by receiving pole plate;
Step5: after the high-frequency signal treatment circuit carries out tuning amplification, integrated amplification, peak detection and voltage transitions to the high frequency small-signal, the output dc voltage signal;
Step6: microprocessor control A/D converter is sampled to d. c. voltage signal, afterwards the numerical value after handling is carried out the foam compensation;
Step7: the numerical value after will compensating and the standard value of setting compare, if error in the scope of setting, then this bottled beer can amount is qualified, bottle enters the next link of manufacturing line; When error is outside setting range, starts the rejecting processing module nonconformity bottle is rejected.
In described step1, the high-frequency signal transmission circuit utilizes crystal oscillating circuit, produces the sine voltage signal of frequency and amplitude stability.
In described step6, described foam compensation is that the magnitude of voltage behind the lather collapse is compensated, compensation method is, relational expression between magnitude of voltage when employing linear regression analysis and least-squares estimation are set up the magnitude of voltage behind the lather collapse and contained foam, utilize this expression formula to obtain the estimated valve of the magnitude of voltage behind the lather collapse, this estimated valve promptly is the magnitude of voltage after the compensation, and described expression formula is:
Wherein,
,
,
,
Be the estimated valve of magnitude of voltage behind the lather collapse,
Be the magnitude of voltage before the lather collapse,
Be before the lather collapse
Individual sample observation,
Be behind the lather collapse
Individual sample observation,
For before the lather collapse
The average of individual sample observation,
For behind the lather collapse
The average of individual sample observation,
For before the lather collapse and lather collapse after
The sum of products of individual sample observation.
The invention has the beneficial effects as follows, saved a large amount of labour power of manual detection; Improved the detection accuracy rate, accuracy rate of the present invention can reach 99%; Improve detection efficiency, can satisfy 72000 bottles/hour detection speed; Eliminated the influence of foam to testing result; Reduced productive costs, realized the testing process harmless health.
Description of drawings
Fig. 1 detects principle schematic;
Fig. 2 detects the principle equivalent circuit;
Fig. 3 is a high-frequency detection circuit overall construction drawing;
Fig. 4 is an AD translation data processing flow chart;
Fig. 5 is the testing result processing flow chart;
Wherein: 1 emission pole plate, 2 receive pole plate, 3 high-frequency signal transmission circuits, 4 high-frequency signal processing modules, 5 intelligent processing modules, 6 oscillator amplifier circuits, 7 integrated amplifiers, 8 peak-detector circuits, 9 voltage conversion circuits, 10 A/D modular converters, 11 microprocessors, 12 foam compensating modules, 13 reject processing module, 14 human-computer interaction modules, 15 warning processing modules.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
The fill quantity of beer on-line measuring device is by high-frequency signal transmission circuit 3, emission pole plate 1, receives pole plate 2, and high-frequency signal processing module 4 and intelligent processing module 5 etc. is partly formed.Wherein, described high-frequency electric field module is corresponding with beer bottle to be detected.Described high-frequency signal processing module comprises bonded assembly oscillator amplifier circuit 6, integrated amplifier 7, peak-detector circuit 8 and voltage conversion circuit 9 successively, and described voltage conversion circuit 9 also links to each other with intelligent processing module 5.Described intelligent processing module 5 comprises microprocessor 11, and described microprocessor 11 is connected with warning processing module 15 with A/D modular converter 10, foam compensating module 12, human-computer interaction module 14, rejecting processing module 13 respectively.
Emission pole plate 1 and reception pole plate 2 have been formed a high-frequency electric field.Beer main component after the can is a water.Water is a kind of strong polarity dielectric, will produce very strong polarization under the effect of extra electric field, it relatively and other material have very big specific inductance capacity (specific inductance capacity of water is 81); When the frequency of extra electric field increased, relaxation polarization can take place in water simultaneously, absorb certain energy, so water had the certain absorption effect to high-frequency signal.When not simultaneously through can amount in the container to be detected of electric field, also different to the sorption of electric field, thus the signal power that receives on the pole plate 2 is also different.In the present invention, the peak value that is embodied in signal along with the difference of can amount difference.
As shown in Figure 1, high-frequency signal transmission circuit 3 is connected with the emission pole plate 1 of high-frequency electric field, high-frequency signal processing module 4 is connected with the reception pole plate 2 of high-frequency electric field.The emission pole plate 1 of high-frequency electric field and the reception pole plate 2 of high-frequency electric field lay respectively at the bottleneck both sides apart from bottleneck 2-3cm place of beer bottle.Prove through repeatedly observed data, when the pole plate distance for 7-8cm the time accuracy of detection reach maximum.The material of emission pole plate 1 and reception pole plate 2 is copper coins of 1mm thickness, is of a size of long 3-5cm, wide 2-3cm.Because it is very faint to receive the high-frequency signal that receives on the pole plate 2, therefore receive the weak point that the line of pole plate 2 and high-frequency signal processing module 4 will be tried one's best, long line can make receiving signal attenuation too much, the precision that influence detects.
This device adopts the power supply of 12V power supply, and what high-frequency signal transmission circuit 1 adopted is the 12V power supply.What microprocessor 11 adopted is+5V voltage therefore need change with the correspondent voltage conversion chip.In addition, high-frequency signal processing module 4 is employing ± 6V power voltage supplies, needs the voltage transitions one-tenth ± 6V voltage with+12V.Unipolarity power source conversion ratio is easier to, and this device relates generally to the conversion of unipolarity power supply to bipolar power supply.The core of polarity transformation circuits is a power amplifier.In-phase input end at op amp inserts a 10-100
Potential device, general+12V voltage carries out inserting after the dividing potential drop in-phase input end, op amp links to each other with the form of follower, and the mouth of op amp is the ground voltage that connects.At this moment, regulator potentiometer just can obtain to suitable position ± 6V voltage.
High-frequency signal transmission circuit 3 adopts crystal oscillating circuit, produces frequency and all very stable sine voltage signal of amplitude.Then this voltage signal is sent to high-frequency electric field emission pole plate 1.
The equivalent circuit of detection principle as shown in Figure 2.Coupling total capacitance C numerical value itself smaller (not enough 1pF) between the two-plate, and the volume that bottleneck enters between the two-plate is also smaller, therefore smaller to the influence of the coupling capacitance between the two-plate, can ignore.The beer that enters surveyed area can come equivalence with resistance R to the sorption of electric field signal.Experiment showed, that beer can not ignore the sorption of electric field,, can judge the liquid level height that enters surveyed area by processing to received signal.Whole testing process as shown in Figure 3.When the can amount that enters surveyed area not simultaneously, equivalent resistance R is also inequality, and the equivalent impedance Z of follow-up circuit can be regarded as constant, so the signal that receives of high-frequency signal processing module 4 difference along with the difference of can amount just.Treating process to received signal comprises that resonance amplifies integrated amplification, peak detection, voltage transitions etc.To testing result, the microprocessor 11 of giving testing result intelligent processing module 5 carries out digitized processing, and the digitized processing of 11 pairs of testing results of microprocessor comprises A/D conversion 10, foam compensation 12 etc.Its digitized processing, the compensation diagram of circuit as shown in Figure 4.For inferior-quality bottle, driving corresponding device for eliminating by microprocessor 11 rejects, simultaneously, add up for the result after handling, when the nonconformity bottle number of continuous rejecting is too much, illustrate that the system failure may appear in machine, at this moment, this device is made alarm response, and process flowchart as shown in Figure 5.For the fill quantity of beer standard value, parameters such as accuracy of detection can be provided with module by parameter and set and show.
The technical solution adopted for the present invention to solve the technical problems is: in high-frequency signal processing module 4, at first carry out tuning amplification by 6 pairs of high frequency small-signals that receive on the pole plate of oscillator amplifier circuit.In this circuit, resonant frequency can be adjusted, and can guarantee resonant frequency so as far as possible on the central frequency of high-frequency signal, and guarantees that oscillator amplifier circuit 6 has certain signal to noise ratio and yield value.Because the gain amplifier of oscillator amplifier circuit 6 is limited, can't satisfy the requirement of native system, we will give integrated bandwidth amplifying circuit through the high-frequency signal of tuning amplification and further amplify.When the magnification factor of multistage amplifier increased, passband was also along with reducing, and promptly gain and passband are conflicting, are therefore needing to choose the amplifier with certain bandwidth in further amplifying circuit.In order to extract the voltage peak of the high-frequency signal after the amplification, the high-frequency signal after we will amplify is given peak-detector circuit 7 and is further processed, and extracts its voltage peak.The magnitude of voltage of this moment is exactly different d. c. voltage signals along with the difference of can amount.But, the d. c. voltage signal of this moment is not within the scope that controller can detect, therefore, need give voltage conversion circuit 9 d. c. voltage signal and handle, its change of voltage scope is controlled within the A/D modular converter 10 receptible scopes of microprocessor 11.
Through after the high-frequency signal processing module 4, the dc voltage value that obtains can characterize the can amount.When beer bottle enters surveyed area, high-frequency signal processing module 4 is given intelligent processing module 5 d. c. voltage signal, by microprocessor 11 control A/D modular converter 10 this voltage signal is sampled, thereby judge whether the can amount is qualified in the container in this surveyed area.Because this detecting device is operated among the environment of electromagnetic interference, at a time, the AD sampled value may mistake occur or sensor is interfered, and makes data too high or low excessively, causes follow-up flush trimmer mistake to be picked.Therefore our method of in this device, adopting medium filtering to combine with the arithmetic mean value.The pairing voltage signal of each beer bottle is sampled, and 50 numerical value of random extraction sort, and 30 numerical value in the middle of getting then average, draw be exactly with this container in the relevant numerical value of liquid level.Though container moves in testing process, but because these 50 times samplings are only finished in several milliseconds, from the time situation as can be known, the container of this moment is still fully in surveyed area, therefore adopt this method not influencing under the situation that detects the can accuracy of measurement, improved the antijamming capability of checking system.
In addition, have a large amount of foams in the bottle behind the beer filling, it is beer and carbon-dioxide compound, and the liquid level of beer is risen, and foam also can have certain influence to electric field simultaneously.Therefore A/D sampling, the numerical value that is converted to be beer and foam jointly to the result of electric field influence, just must compensate in order to improve precision beer foam.
In the actual detection process, can know two values: the beer measuring voltage value when containing foam, the beer measuring voltage value behind the lather collapse for same detected object.Beer measuring voltage value behind the lather collapse is only the actual value of real reflection fill quantity of beer, the present invention adopts linear regression analysis and least-squares estimation to set up the beer observed reading behind the lather collapse and the beer when containing foam measure between the approximate expression of relation.Owing to do not have definite functional relation between two variablees, therefore must take into account random fluctuation, obtain approximate expression and come the influence of foam is compensated.So it is as follows to introduce model:
Wherein:
It is the magnitude of voltage behind the lather collapse;
It is the magnitude of voltage that contains foam;
It is change variable (being called random error).
Can establish two expression formulas between the variable is:
Can test and obtain the observed value of one group of take off data as sample, data (
) satisfy formula 2, then have
Wherein:
Be before the lather collapse
Individual sample observation,
Be behind the lather collapse
Individual sample observation,
Separate.In linear model, know by hypothesis
Formula 5 is
Estimation, be
About
Equation of linear regression or empirical equation, its image is called regression straight line,
Be called coefficient of regression.
If
With
Depart from more for a short time, straight line and all observed values fit well more, order
The employing method of least square is sought
Estimation
, make
With
The sum of squares minimum of difference.Then ask
Value is:
(9)
Wherein:
,
,
,
For before the lather collapse
The average of individual sample observation,
For behind the lather collapse
The average of individual sample observation,
For before the lather collapse and lather collapse after
The sum of products of individual sample observation.
Approximate expression between observed reading when formula (10) is the observed reading behind the lather collapse and contains foam, wherein,
It is the estimated valve of magnitude of voltage behind the lather collapse.
In the actual calculation process, (x, y n) carry out linear regression analysis to the function polyfit among the employing MATLAB, find the solution
Estimation
After the beer foam compensation, the accuracy of detection of system has obtained further raising.
Judge fill quantity of beer when qualified after overcompensation, this device is not made any action, and bottle enters the next link of manufacturing line.When detecting the bottle nonconformity, the 13 pairs of nonconformity bottles of rejecting processing module that start response are rejected.Check implement is in the long-time running process, because factors such as the unusual sudden change of environmental conditions can make system produce gross error, it also is to influence the very important factor of system accuracy.The qualified gross error of judging the system that to remedy simultaneously of native system fill quantity of beer.Numerical value after we will compensate carries out comparing with the standard value of setting, if within the standard value top/bottom latitude (it is fixed that scope can be come according to the debugging situation of reality), judge that then this bottled beer can amount is up-to-standard, total bottle of number of qualified beer liquid level adds one simultaneously, and corresponding nonconformity bottle number continuously subtracts one; If nonconformity bottle number is a negative value continuously, continuous nonconformity bottle number is equalled zero.If judge the fill quantity of beer nonconformity, then nonconformity beer bottle sum adds one, and number of non-compliances also adds one continuously simultaneously.Simultaneously signal is passed to flush trimmer in this nonconformity beer is rejected,, then report to the police if nonconformity bottle number surpasses ten continuously.
Human-computer interaction module 14 of the present invention adopts Liquid Crystal Display (LCD) to carry out the time, the total bottle of detection number, and qualified bottle number detects the demonstration of detection data such as qualification rate; Simultaneously, there is the corresponding button to realize the setting of detected parameters, functions such as the switching of real picture.
Claims (8)
1. the device of an online detection fill quantity of beer is characterized in that, it comprises bonded assembly high-frequency signal source module, high-frequency electric field module, high-frequency signal processing module and intelligent processing module successively; Wherein, described high-frequency electric field module is corresponding with beer bottle to be detected.
2. the device of online detection fill quantity of beer as claimed in claim 1, it is characterized in that, described high-frequency signal processing module comprises bonded assembly oscillator amplifier circuit, integrated amplifier, peak-detector circuit and voltage conversion circuit successively, and described voltage conversion circuit also links to each other with intelligent processing module.
3. the device of online detection fill quantity of beer as claimed in claim 2, it is characterized in that, described intelligent processing module comprises microprocessor, and described microprocessor is connected with A/D modular converter, foam compensating module, human-computer interaction module, rejecting processing module and warning processing module respectively.
4. the device of online detection fill quantity of beer as claimed in claim 1 is characterized in that, described high-frequency signal source module is the high-frequency signal transmission circuit, and it utilizes the power supply of 12V power supply.
5. the device of online detection fill quantity of beer as claimed in claim 1, it is characterized in that, described high-frequency electric field module is made up of corresponding emission pole plate and reception pole plate, described emission pole plate and reception pole plate are positioned at the 2-3cm place, bottleneck both sides of beer bottle to be detected, the distance of two-plate is 7-8cm, the material of two-stage plate is the copper coin of 1mm thickness, is of a size of long 3-5cm, wide 2-3cm.
6. a method that adopts the described online detection fill quantity of beer of claim 1 is characterized in that, this method of inspection may further comprise the steps:
Step1: at first the high-frequency signal transmission circuit sends the voltage signal that produces to the emission pole plate;
Step2: the emission pole plate reception pole plate corresponding with it that receives voltage signal formed a high-frequency electric field;
Step3: when container to be detected enters this high-frequency electric field, receive pole plate and will receive the high frequency small-signal;
Step4: the high frequency small-signal is sent into the high-frequency signal treatment circuit by receiving pole plate;
Step5: after the high-frequency signal treatment circuit carries out tuning amplification, integrated amplification, peak detection and voltage transitions to the high frequency small-signal, the output dc voltage signal;
Step6: microprocessor control A/D converter is sampled to d. c. voltage signal, afterwards the numerical value after handling is carried out the foam compensation;
Step7: the numerical value after will compensating and the standard value of setting compare, if error in the scope of setting, then this bottled beer can amount is qualified, bottle enters the next link of manufacturing line; When error is outside setting range, starts the rejecting processing module nonconformity bottle is rejected.
7. the method for online detection fill quantity of beer as claimed in claim 6 is characterized in that, in described step1, the high-frequency signal transmission circuit utilizes crystal oscillating circuit, produces the sine voltage signal of frequency and amplitude stability.
8. the method for online detection fill quantity of beer as claimed in claim 6, it is characterized in that, in described step6, described foam compensation is that the magnitude of voltage behind the lather collapse is compensated, compensation method is, adopt linear regression analysis and least-squares estimation to set up the magnitude of voltage behind the lather collapse and the magnitude of voltage when containing foam between relational expression, utilize this expression formula to obtain the estimated valve of the magnitude of voltage behind the lather collapse, this estimated valve promptly is the magnitude of voltage after the compensation, and described expression formula is:
Wherein,
,
,
,
Be the estimated valve of magnitude of voltage behind the lather collapse,
Be the magnitude of voltage before the lather collapse,
Be before the lather collapse
Individual sample observation,
Be behind the lather collapse
Individual sample observation,
For before the lather collapse
The average of individual sample observation,
For behind the lather collapse
The average of individual sample observation,
For before the lather collapse and lather collapse after
The sum of products of individual sample observation.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102519540A (en) * | 2011-12-10 | 2012-06-27 | 山东明佳包装检测科技有限公司 | Detecting method of beer foam compensating liquid level |
CN104029864A (en) * | 2014-05-27 | 2014-09-10 | 楚天科技股份有限公司 | On-line monitoring method and device and production line for infusion bottle filling |
CN105352669A (en) * | 2015-12-17 | 2016-02-24 | 天朗科技有限公司 | Internal quickly pressure-boosting method for bear or carbonated beverages after being sealed |
CN111114780A (en) * | 2019-12-20 | 2020-05-08 | 山东大学 | Unmanned aerial vehicle steel bar detection standard part placing and recycling system and method |
-
2010
- 2010-05-14 CN CN2010101721220A patent/CN101823679B/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102519540A (en) * | 2011-12-10 | 2012-06-27 | 山东明佳包装检测科技有限公司 | Detecting method of beer foam compensating liquid level |
CN104029864A (en) * | 2014-05-27 | 2014-09-10 | 楚天科技股份有限公司 | On-line monitoring method and device and production line for infusion bottle filling |
CN105352669A (en) * | 2015-12-17 | 2016-02-24 | 天朗科技有限公司 | Internal quickly pressure-boosting method for bear or carbonated beverages after being sealed |
CN111114780A (en) * | 2019-12-20 | 2020-05-08 | 山东大学 | Unmanned aerial vehicle steel bar detection standard part placing and recycling system and method |
CN111114780B (en) * | 2019-12-20 | 2021-04-02 | 山东大学 | Unmanned aerial vehicle steel bar detection standard part placing and recycling system and method |
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