CN109856082A - The detection method and detection device of quick-fried pearl in cigaratte filter - Google Patents
The detection method and detection device of quick-fried pearl in cigaratte filter Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 79
- 238000012360 testing method Methods 0.000 claims abstract description 133
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 95
- 230000001678 irradiating effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 description 6
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- 238000004364 calculation method Methods 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000001328 terahertz time-domain spectroscopy Methods 0.000 description 4
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- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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Abstract
This application involves the detection methods and detection device of quick-fried pearl in a kind of cigaratte filter.Detection method includes the following steps: light beam is radiated on cigaratte filter to be measured；The light beam after irradiating cigaratte filter to be measured is received, and test signal is generated according to the light beam received；Test signal is compared with preset standard signal, judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured；Preset standard signal includes the signal to standard cigarette filter tip in filter tip comprising being detected in the case where quick-fried pearl.Detection device includes terahertz emission source, terahertz detector, signal amplifier and computer.This method and device are by comparing whether, containing quick-fried pearl, detection is accurate, detects high reliablity in the similarity judgement cigaratte filter to be measured of test signal and preset standard signal.
Description
Technical field
This application involves food production process technical fields, more particularly to a kind of detection method of quick-fried pearl in cigaratte filter
With detection device.
Background technique
Pay attention to day by day with the increase and cigarette consumption person of international smoking ban cry to own health, low tar less harmful
Cigarette will become the mainstream of future world cigarette, but cigarette fragrance loss and comfort level change are necessarily accompanied with while lowering harm and decreasing coking
Difference.Quick-fried pearl is the abbreviation of essence microcapsule, is often placed in the filter tip of cigarette, adds quick-fried pearl in cigarettes, can improve perfume (or spice)
The physicochemical property of cigarette modifies cigarette perfume taste, is a kind of effective ways for promoting cigarette mouthfeel.
However in quick-fried pearl pouring process, due to conveyer belt fluctuation and the shake of quick-fried pearl pressurizing unit, quick-fried pearl addition will lead to
There is the case where leakage adds.The mainly artificial sampling observation of the quick-fried pearl detection method of traditional cigarette, but this method heavy workload, efficiency
It is low, detection it is not accurate enough, cause detect reliability it is low.
Summary of the invention
Based on this, it is necessary to for the low problem of the quick-fried pearl detection method detection reliability of conventional cigarette, provide a kind of cigarette
The detection method and detection device of quick-fried pearl in filter tip.
The detection method of quick-fried pearl in a kind of cigaratte filter, comprising the following steps:
Light beam is radiated on cigaratte filter to be measured；
The light beam after irradiating the cigaratte filter to be measured is received, and test signal is generated according to the light beam received；
The test signal is compared with preset standard signal, whether is judged in the cigaratte filter to be measured containing quick-fried
Pearl obtains testing result；The preset standard signal include to standard cigarette filter tip in filter tip comprising quick-fried pearl in the case where into
The signal that row detection obtains.
The detection device of quick-fried pearl in a kind of cigaratte filter, including terahertz emission source, terahertz detector, signal amplifier
And computer, the signal amplifier connect the computer；The terahertz emission source is to be measured for generating thz beam
Cigaratte filter is moved to the thz beam focal position；The terahertz detector, which receives, irradiates the cigaratte filter to be measured
Thz beam afterwards, and the thz beam received is transformed into current signal；The terahertz detector is by generation
Current signal is exported after the signal amplifier to the computer, realizes that the collection that test signal is adopted, the computer are used
In comparing the test signal with preset standard signal, judge to obtain in the cigaratte filter to be measured whether containing quick-fried pearl
To testing result.
The detection method and detection device of quick-fried pearl in above-mentioned cigaratte filter, by the way that light beam to be radiated on cigaratte filter to be measured
Afterwards, the light beam after irradiating cigaratte filter to be measured is received, and test signal is generated according to the light beam received, then will test signal
It is compared with preset standard signal, judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured.Preset standard letter
Number include to standard cigarette filter tip in filter tip comprising the signal detected in the case where quick-fried pearl, by comparing test letter
Number in the similarity judgement cigaratte filter to be measured of preset standard signal whether contain quick-fried pearl.This method is relatively sentenced by signal
Break whether containing quick-fried pearl in cigaratte filter to be measured, this method quick nondestructive, detection is accurate, detects high reliablity.
Detailed description of the invention
Fig. 1 is the flow diagram of the detection method of quick-fried pearl in cigaratte filter in one embodiment；
Fig. 2 is the flow diagram of the detection method of quick-fried pearl in cigaratte filter in another embodiment；
Fig. 3 is the flow diagram of the detection method of quick-fried pearl in cigaratte filter in another embodiment；
Fig. 4 is the testing result figure of quick-fried pearl in cigaratte filter in one embodiment；
Fig. 5 is the structure chart of the detection device of quick-fried pearl in cigaratte filter in one embodiment；
Fig. 6 is the structure chart of terahertz time-domain spectroscopy on-line detecting system in one embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is described more fully the present invention.It should be appreciated that specific embodiment described herein is only to explain this hair
It is bright, it is not intended to limit the present invention.
In one embodiment, as shown in Figure 1, providing a kind of detection method of quick-fried pearl in cigaratte filter, this method packet
Include following steps:
Step S200: light beam is radiated on cigaratte filter to be measured.
Light beam includes the visible light beam that Normal human vision can be caused to respond and other sightless light beams of naked eyes, light
The wavelength of beam is included in the wave-length coverage of electromagnetic wave, it is possible to think that light belongs to a kind of electromagnetic wave.By light beam be radiated to
After surveying on cigaratte filter, the letter of the part on cigaratte filter to be measured can be obtained according to the reaction result of light beam and cigaratte filter to be measured
Breath.Light beam is generated and is issued by light beam generator, is radiated on cigaratte filter to be measured.
Specifically, the concrete type of light beam is not unique, such as can be terahertz light, X-ray etc..When light beam is Terahertz
Light time, light beam generator can be terahertz emission source；When light beam is X-ray, light beam generator can be X-ray tube.Terahertz
Hereby light is from middle and later periods the last century 80's, and just by definite designation, scientists will be referred to collectively as far infrared and penetrate before this
Line.Terahertz light refers to frequency in the electromagnetic wave of 0.1THz to 10THz (Terahertz, Terahertz) range, and wavelength probably exists
0.03 arrives 3mm range, between microwave and it is infrared between, THz wave penetrability is strong, and photon energy is small, to sample without destructiveness,
Many biomolecule have characteristic absorption in terahertz wave band, using this characteristic, thz beam are radiated at cigarette to be measured and is filtered
The structural information of cigaratte filter to be measured can be obtained when on mouth according to the characteristic absorption characteristic of filter tip different structure.X-ray is called X
Ray, X-ray are the transition due to the electronics in atom between two energy levels that energy differs greatly and the particle flux generated,
Because its wavelength is short, energy is big, and when impinging upon on substance, only a part is absorbed by substance, most of to penetrate via atom gap,
Show very strong penetration capacity.The penetration power of X-ray is related with material density, absorption of the bigger substance of density to X-ray
It is stronger, the different substance of density can be distinguished using this property of differential absorption.X-ray beam is radiated at cigarette filter to be measured
The structural information of cigaratte filter to be measured can be obtained when on mouth to the degree of absorption difference of X-ray according to filter tip different structure.
Different according to the detection position of cigaratte filter to be measured, the position that light beam is radiated at cigaratte filter to be measured is also corresponding different, at one
In embodiment, light beam irradiation is preset detection position, and preset check bit is set to putting for the quick-fried pearl defaulted in cigaratte filter
Seated position.The preset detection position of light beam irradiation, which carries out detection, can be improved detection efficiency.It is appreciated that in other embodiments
In, light beam can also irradiate entire cigaratte filter, to realize the detection to entire cigaratte filter.Since the diameter of quick-fried pearl compares cigarette
The diameter of filter tip is small, can be by quick-fried pearl in tobacco filter when production, and position of the quick-fried pearl in cigaratte filter may occur
When moving, therefore detecting to entire cigaratte filter, the accuracy of testing result can be improved.
Step S400: the light beam after irradiating cigaratte filter to be measured is received, and test signal is generated according to the light beam received.
Different according to the type for the light beam for irradiating cigaratte filter to be measured, the test signal that the light beam received generates is also different
Sample, specifically, when the light beam for irradiating cigaratte filter to be measured is terahertz light, test signal is to be measured based on the irradiation received
The signal that the situation of change of terahertz light after cigaratte filter generates is surveyed when the light beam for irradiating cigaratte filter to be measured is X-ray
Trial signal is the signal generated based on the different X-ray of the attenuation degree after the irradiation cigaratte filter to be measured received.
Step S600: test signal is compared with preset standard signal, judges whether contain in cigaratte filter to be measured
Quick-fried pearl, obtains testing result.
Preset standard signal includes being detected in filter tip in the case where including quick-fried pearl to standard cigarette filter tip
Signal, and think that the quick-fried pearl for including in standard cigarette filter tip herein is that completely, test signal is carried out with preset standard signal
After comparison, if the similarity degree of test signal and preset standard signal is larger, it is believed that test signal and preset standard are believed
The information of number reaction be very close to, i.e., include quick-fried pearl in current cigaratte filter to be measured, whereas if test signal and default
The similarity degree of standard signal is small, then it is believed that test signal it is different from the information of preset standard signal reaction, i.e., it is current to
It surveys and does not include quick-fried pearl in cigaratte filter.Many different signals can be obtained when detecting the different location of cigaratte filter to be measured, this
When should select test signal with the maximum signal of preset standard signal similarity degree as this cigaratte filter to be measured, reduce and miss
Inspection rate.Wherein, the judgment criteria of similarity degree is not unique, such as signal threshold value is exactly one of judgment criteria, Ke Yili
Solution in other embodiments can also be using the other parameters of reflection signal characteristic as test signal and preset standard signal
Similarity degree judgment basis, as long as those skilled in the art think feasible.
In one embodiment, preset standard signal further includes the feelings for not including quick-fried pearl in filter tip to standard cigarette filter tip
The signal detected under condition.When preset standard signal had both included the case where standard cigarette filter tip in filter tip comprising quick-fried pearl
The lower signal detected, but including standard cigarette filter tip in filter tip do not include quick-fried pearl in the case where detected to obtain
Signal when, will test signal and after the two preset standard signals compare respectively, if test signal and standard cigarette
The signal similarity degree that filter tip is detected in the case where including quick-fried pearl in filter tip is larger, and exists with standard cigarette filter tip
When smaller not comprising the signal similarity degree detected in the case where quick-fried pearl in filter tip, then it is believed that current perfume (or spice) to be measured
It include quick-fried pearl in cigarette filter tip；If test signal is detected in the case where not including quick-fried pearl in filter tip with standard cigarette filter tip
Obtained signal similarity degree is larger, and include quick-fried pearl in filter tip with standard cigarette filter tip in the case where is detected
When signal similarity degree is smaller, then it is believed that not including quick-fried pearl in current cigaratte filter to be measured；If testing signal and two
The similarity degree of preset standard signal is not high, then consider containing incomplete quick-fried pearl in cigaratte filter to be measured, it is incomplete
Quick-fried pearl includes that quick-fried pearl is the states such as hollow, damaged.It will test signal and standard cigarette filter tip the case where including quick-fried pearl in filter tip
The letter that the lower signal detected and standard cigarette filter tip are detected in the case where not including quick-fried pearl in filter tip
It number compares to judge testing result can be made accurate, detect reliability when being comprising quick-fried pearl in cigaratte filter to be measured
It is high.
The detection method of quick-fried pearl in above-mentioned cigaratte filter is received and is shone after light beam is radiated on cigaratte filter to be measured
Light beam after penetrating cigaratte filter to be measured, and test signal is generated according to the light beam received, it then will test signal and pre- bidding
Calibration signal compares, and judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured.Preset standard signal includes pair
The signal that standard cigarette filter tip is detected in the case where including quick-fried pearl in filter tip by comparing test signal and is preset
Whether contain quick-fried pearl in the similarity judgement of standard signal cigaratte filter to be measured.This method passes through signal multilevel iudge perfume (or spice) to be measured
Whether quick-fried pearl is contained in cigarette filter tip, and detection is accurate, detects high reliablity.
In one embodiment, Fig. 2 is referred to, further includes step S500 before step S600: focusing the beam onto standard
On cigaratte filter；Light beam after receiving irradiation standard cigarette filter tip, and preset standard signal is generated according to the light beam received.
Specifically, the type for irradiating the light beam of standard cigarette filter tip is not unique, but should be with irradiation cigaratte filter to be measured
Beam type be consistent, to guarantee the accuracy of testing result.For example, the type of the light beam of irradiation standard cigarette filter tip
It can be THz wave.THz wave photon energy is low, to cigarette sample without any destructiveness.
In one embodiment, the test signal error that can be eliminated when comparing consistent with the type of preset standard signal,
Guarantee the accuracy of testing result.Specifically, it tests signal and preset standard signal is time-domain signal, time domain is description mathematics
Function or physical signal are to the relationship of time, therefore time-domain signal can both pass through with expression signal with the variation of time
The variation of signal waveform reflects that signal changes with time situation, can accurate, high-precision, intuitively reflect detected object
Relevant information.It is appreciated that in other embodiments, testing signal and preset standard signal can also be frequency-region signal, only
Those skilled in the art are wanted to think may be implemented.
In one embodiment, light beam is thz beam, refers to Fig. 3, and step S400 includes step S420: receiving and shines
Thz beam after penetrating cigaratte filter to be measured, and test signal is obtained according to the thz beam received.
Wherein, test signal is time-domain signal.Thz beam is by terahertz emission generation device by femto-second laser pulse
It is generated after excitation.Femto-second laser can produce wavelength in the femto-second laser pulse of 800nm or so, the femto-second laser pulse of generation
It is divided into pumping pulse and direct impulse after beam splitter, pumping pulse is incident on excitation on terahertz emission device and is generated too
Hertz pulse, direct impulse are incident on terahertz detection device after time delay system, the terahertz pulse warp of excitation
It is irradiated on cigaratte filter to be measured after crossing optical path adjustment, the terahertz pulse for penetrating cigaratte filter to be measured reaches Terahertz by optical path
In detection device.The time delay between terahertz pulse and direct impulse is adjusted by control time delay system, so that
Terahertz pulse and direct impulse reach terahertz detection device simultaneously, and terahertz pulse and direct impulse are in terahertz detector
It is upper interaction and generate current signal, the current signal generated on terahertz detector export after signal amplifier to meter
Calculation machine, computer can detect the entire time domain waveform of terahertz pulse, obtain test signal.Further, pass through test
Signal can carry out cigaratte filter to be measured further with optical parameters such as the absorption coefficient of cigaratte filter to be measured and refractive index
Analysis.It is appreciated that in other embodiments, time-domain signal can also be obtained by other kinds of light beam.
In one embodiment, Fig. 3 is referred to, includes including in filter tip to standard cigarette filter tip with preset standard signal
For the signal detected in the case where quick-fried pearl, step S600 includes step S620 to step S680.
Step S620: the signal peak number of test signal and the signal peak number of bidding calibration signal are obtained.
Signal peak number refers to that signal in a cycle reaches the number of peak value.In the present embodiment, a cycle refers to
It is the time detected to a cigaratte filter.The signal peak number for obtaining test signal includes: to obtain detection one first
The test signal obtained when cigaratte filter to be measured, then by obtaining letter to test signal progress numerical analysis or pattern analysis
Number peak number mesh.By taking the quantity of standard cigarette filter tip is one as an example, the signal peak number for obtaining preset standard signal includes: first
The preset standard signal obtained when obtaining one standard cigarette filter tip of detection, then by carrying out numerical value to the preset standard signal
Analysis or pattern analysis obtain the signal peak number of preset standard signal.Signal peak can reflect measured matter and occur when detecting
Characteristic reaction, it will be understood that in other embodiments, the quantity of standard cigarette filter tip may be two or more.
Step S640: the peak-to-peak value of test signal and the peak-to-peak value of preset standard signal are obtained.
Peak-to-peak value refers to value poor between signal peak and minimum in a cycle, it is exactly minimum and maximum between
Range.In the present embodiment, a cycle refers to the time detected to a cigaratte filter.Obtain the peak of test signal
Peak value includes: the test signal obtained when obtaining one cigaratte filter to be measured of detection first, and it is maximum then to obtain the test signal
Value and minimum value, the peak-to-peak value of the test signal is calculated further according to obtained maximum value and minimum value.With standard cigarette filter tip
For quantity is one, the peak-to-peak value for obtaining preset standard signal includes: to obtain when obtaining one standard cigarette filter tip of detection first
Then the preset standard signal arrived obtains the maximum value and minimum value of the preset standard signal, further according to obtained maximum value and
Minimum value calculates the peak-to-peak value of the preset standard signal.Peak-to-peak value can objectively and accurately reflect the big of the variation range of signal value
It is small.It is appreciated that in other embodiments, the quantity of standard cigarette filter tip may be two or more.
Step S660: by comparing signal peak number and the preset standard signal of test signal signal peak number and sentence
Whether whether the peak-to-peak value of disconnected test signal judge in filter tip in the peak-to-peak value threshold range of preset standard signal containing quick-fried
Pearl.It specifically includes:
It is detected to obtain in the case that it includes quick-fried pearl in filter tip that preset standard signal is to standard cigarette filter tip
When signal, after obtaining the signal peak number and peak-to-peak value of test signal and preset standard signal, compare the letter of test signal first
Whether number peak number mesh and the signal peak number of the first preset standard signal equal, if equal, will test the peak-to-peak value of signal with
The peak-to-peak value of first preset standard signal compares, if the peak-to-peak value of test signal is in the peak-to-peak value of the first preset standard signal
In range, then illustrate to contain quick-fried pearl in cigaratte filter to be measured.When preset standard signal had both included to standard cigarette filter tip in filter tip
In comprising the first preset standard signal for being detected in the case where quick-fried pearl, and include to standard cigarette filter tip in filter tip
When the second preset standard signal detected in the case where not comprising quick-fried pearl, test signal and preset standard signal are obtained
Signal peak number and peak-to-peak value after, compare first test signal signal peak number and the first preset standard signal signal peak
Whether number is equal, if so, the peak-to-peak value of the peak-to-peak value for testing signal and the first preset standard signal is compared, if test
The peak-to-peak value of signal then illustrates to contain quick-fried pearl in filter tip within the scope of the peak-to-peak value of the first preset standard signal；If in the first step
The signal peak number for testing signal and the signal peak number of the first preset standard signal are unequal, then continue the letter that will test signal
Number peak number mesh and the signal peak number of the second preset standard signal compare, if so, continue will to test the peak-to-peak value of signal with
The peak-to-peak value of second preset standard signal compares, if the peak-to-peak value of test signal is in the peak-to-peak value of the second preset standard signal
In range, then it is assumed that do not include quick-fried pearl in the cigaratte filter to be measured；If testing the signal peak number and the second preset standard of signal
The signal peak number of signal is equal, and test signal peak-to-peak value lower than the second preset standard signal peak-to-peak value lower threshold but
Higher than the peak-to-peak value threshold values upper limit of the first preset standard signal, then consider containing imperfect quick-fried pearl in cigaratte filter, it is imperfect quick-fried
Pearl includes the quick-fried pearl of the states such as hollow, damaged；If there is other embodiments situation in addition to the implementation, then it is assumed that this time examine
It is invalid to survey, it should re-start detection.Both having included when preset standard signal includes quick-fried pearl in filter tip to standard cigarette filter tip
In the case of the first preset standard signal for being detected again include not including quick-fried pearl in filter tip to standard cigarette filter tip
In the case of detected the second preset standard signal when, need to test signal and two preset standard signals carry out pair
Than can effectively improve the accuracy of detection method.
In one embodiment, before the step of obtaining the peak-to-peak value of the peak-to-peak value and preset standard signal of test signal,
The threshold range of the peak-to-peak value of default preset standard signal.The step of threshold range of the peak-to-peak value of default preset standard signal,
Include:
μ-σ≤F1≤μ+σ (1)
Wherein, F1 is the peak-to-peak value of preset standard signal, and μ is the average value of the peak-to-peak value of preset standard signal, and σ is default
The standard deviation of the peak-to-peak value of standard signal.
Specifically, the quantity of standard cigarette filter tip is not unique, and by taking the quantity of standard cigarette filter tip is k as an example, k's is taken
Value is determined according to specific requirements, for example, k can take lesser value when needing to improve detection efficiency, is wanted when to detection accuracy
When asking higher, the value of k should suitably increase.After choosing k standard cigarette filter tip, to k standard cigarette filter tip in filter tip
It is detected in the case where comprising quick-fried pearl, obtains k preset standard signal.It, can according to formula (1) based on k preset standard signal
Be calculated standard cigarette filter tip in filter tip comprising quick-fried pearl preset standard signal, wherein μ is k peak-to-peak value
Mean value, σ are the standard deviation of k peak-to-peak value.
Specifically, the calculation formula of μ are as follows:
Wherein, hi be i-th standard cigarette filter tip include quick-fried pearl in filter tip preset standard signal peak
Peak value, k are the quantity of standard cigarette filter tip, 1≤i≤k.
The calculation formula of σ are as follows:
Wherein, hi be i-th standard cigarette filter tip include quick-fried pearl in filter tip preset standard signal peak
Peak value, k are the quantity of standard cigarette filter tip, 1≤i≤k.
When k is 1, the peak-to-peak value of preset standard signal is the signal detected to Current standards cigaratte filter
Peak-to-peak value, carrying out detection to a standard cigarette filter tip can be improved detection efficiency, reduce testing cost；When k is greater than 1,
The peak-to-peak value of preset standard signal be to take mean value and variance according to detect that multiple standard cigarette filter tips obtain signal, then pass through
The reference value being calculated is crossed, carrying out detection to multiple standard cigarette filter tips can be improved detection accuracy, improve detection reliability.
Expansiblely, detect in the case that it includes quick-fried pearl in filter tip that preset standard signal, which had both included to standard cigarette filter tip,
To the first preset standard signal include again to standard cigarette filter tip in filter tip do not include quick-fried pearl in the case where detect
When the second preset standard signal arrived, the peak-to-peak value method of the second preset standard signal of acquisition and above-mentioned acquisition standard cigarette filter tip
The method of the peak-to-peak value of the first preset standard signal detected in the case where including quick-fried pearl in filter tip is similar, herein
It repeats no more.
Above-described embodiment in order to better understand to the cigaratte filter comprising quick-fried pearl and is not included quick-fried using thz beam
The cigaratte filter of pearl is detected respectively, and testing result is as shown in Figure 4, wherein abscissa is the time of optical delay, indulges and sits
Be designated as the intensity of terahertz signal, solid line represent to the filter tip comprising quick-fried pearl detected as a result, dotted line is represented to not
The result that filter tip comprising quick-fried pearl is detected.As seen from the figure, the cigaratte filter comprising quick-fried pearl and the perfume (or spice) not comprising quick-fried pearl
The terahertz time-domain signal of cigarette filter tip has notable difference.Time-domain signal in the case of cigaratte filter comprising quick-fried pearl is not with including
The terahertz time-domain signal of the cigaratte filter of quick-fried pearl obviously dies down compared to intensity, illustrates that the presence of quick-fried pearl hinders a part of terahertz
Hereby transmission of the wave in filter tip.In addition, as shown in Figure 4, when thz beam exposes to the cigaratte filter comprising quick-fried pearl, time domain wave
There are two time-domain signal peaks in shape, this may be since the reflection multilayer between Zhu Bi and essence causes；Thz beam focuses
When extremely not including the cigaratte filter of quick-fried pearl, only one time-domain signal peak of time domain waveform.Therefore, by irradiating thz beam
It whether can accurately be detected on to filter cigarette holder to be measured in cigaratte filter to be measured comprising quick-fried pearl.
In another embodiment, step S600 includes: the degree of fitting for calculating test signal and preset standard signal, according to
Degree of fitting judges whether contain quick-fried pearl in cigaratte filter to be measured.
Degree of fitting refers to the fitting degree of test signal and preset standard signal.The statistic for measuring degree of fitting is degree of fitting
The value that index RNew, RNew maximum value is 1, RNew illustrates that the fitting degree for testing signal and preset standard signal is got over closer to 1
It is good；Conversely, the value of RNew is smaller, illustrate that the fitting degree for testing signal and preset standard signal is poorer.Degree of fitting index RNew
Calculation formula are as follows:
RNew=1- (Q/ ∑ y^2) ^ (1/2) (4)
Wherein, Q is the residual sum of squares (RSS) for testing signal and preset standard signal, and y is to detect to cigaratte filter to be measured
Obtained test signal.The calculation formula of residual sum of squares (RSS) Q are as follows:
Q=∑ (y-y*) ^2 (5)
Wherein, y is the test signal detected to cigaratte filter to be measured, and y* is to examine to standard cigarette filter tip
The preset standard signal measured.When preset standard signal be to standard cigarette filter tip in filter tip include quick-fried pearl in the case where into
When the signal that row detection obtains, the value by calculating test signal and the degree of fitting index RNew of preset standard signal is tested
The fitting degree of signal and preset standard signal, when the fitting degree for testing signal and preset standard signal is high, then it is assumed that
Surveying includes quick-fried pearl in cigaratte filter, when test signal is low with the fitting degree of preset standard signal, then it is assumed that cigarette filter to be measured
Quick-fried pearl is not included in mouth, testing result is accurate and reliable.Expansiblely, when preset standard signal had both included existing to standard cigarette filter tip
The first preset standard signal in filter tip comprising being detected in the case where quick-fried pearl includes filtering to standard cigarette filter tip again
When not including the second preset standard signal detected in the case where quick-fried pearl in mouth, it can first be compared by the above method
The degree of fitting index for testing signal and the first preset standard signal, when the fitting degree of test signal and the first preset standard signal
Thought when high comprising quick-fried pearl in cigaratte filter to be measured, as test signal Shi Zeji low with the fitting degree of the first preset standard signal
The continuous degree of fitting index for calculating test signal and the second preset standard signal, when intending for test signal and the second preset standard signal
Conjunction degree thinks not including quick-fried pearl in cigaratte filter to be measured when high, when the fitting degree of test signal and the second preset standard signal
Consider to include incomplete quick-fried pearl in filter tip when low.The method of this dual comparison, which can be identified effectively in detection process, to be occurred
Erroneous judgement, improve the reliability of detection.
In one embodiment, the brand and model and placement direction of cigaratte filter to be measured and standard cigarette filter tip are all the same.
The cigarette model comprising quick-fried pearl of commercial type is more, and different model, different types of cigarette diameter and quick-fried pearl have differences,
Therefore the cigarette of different model includes the signal strength and peak width when not including two kinds of quick-fried pearl in quick-fried pearl and filter tip in filter tip
It is variant.Therefore, cigaratte filter to be measured will be consistent with the model of standard cigarette filter tip.Cigaratte filter to be measured and standard are fragrant
When the placement direction difference of cigarette filter tip, the structure of cigaratte filter to be measured and standard cigarette filter tip that light beam passes through is different, can make
The beam signal received is different, but this is not both that not can truly reflect cigaratte filter as caused by experimental error
In whether include quick-fried pearl.Therefore, cigaratte filter to be measured should be the same with the placement direction of standard cigarette filter tip, is missed with reducing experiment
Difference.In the selection of standard cigarette filter tip, should also select include complete quick-fried pearl cigaratte filter as standard cigarette filter tip,
To improve the accuracy of testing result, when in the selection of cigaratte filter to be measured, each cigaratte filter can be examined
Survey, have frequency to improve, cigaratte filter to be measured can also be chosen using the method for random sampling, can save in this way detection at
This.Expansiblely, there may be differences for signal strength expression mode or unit of different test equipments etc., in order to avoid instrument is made
At detection error, cigaratte filter to be measured should be tested with standard cigarette filter tip in same signal-stabilized instrument.
In one embodiment, a kind of detection device of quick-fried pearl in cigaratte filter is provided, which includes Terahertz
Radiation source, terahertz detector, signal amplifier and computer, signal amplifier connect computer；Terahertz emission source is used for
Generate thz beam；Filter tip sample to be measured is moved to thz beam focal position, terahertz detector shines for receiving
Thz beam after penetrating cigaratte filter to be measured simultaneously generates current signal；Signal amplifier is by the electric current from terahertz detector
Signal amplification, and amplified current signal is exported to computer；Computer is for acquiring the amplification from signal amplifier
Current signal, computer acquisition to signal be also known as terahertz signal, or test signal；Computer will test signal with
Preset standard signal compares, and judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured.Specifically, it calculates
Machine will test signal and preset standard signal carries out analysis comparison, when preset standard signal is that standard cigarette filter tip wraps in filter tip
It, can if test signal and preset standard signal similarity degree are big when the signal detected in the case where containing quick-fried pearl
Think in the cigaratte filter of current detection comprising quick-fried pearl.The apparatus structure is simple, detects high reliablity.
Further, the detection device of quick-fried pearl can be transmission-type terahertz time-domain spectroscopy system and device in cigaratte filter,
The device includes femto-second laser 100, terahertz emission source 102, terahertz detector 109, signal amplifier 110 and computer
111 etc., femto-second laser 100 can be Ti:sapphire mode-locked laser, and the femtosecond laser that femto-second laser 100 emits enters system
It is divided into two beams by spectroscope 101, the first beam is pump light, and pump light is projected to terahertz emission source 102, and excitation generates terahertz
Hereby pulse, the second beam are detection light, and detection light is projected to after reflecting mirror 106 and reflecting mirror 107 and time delay device 108
Terahertz detector 109.The terahertz pulse of excitation by off axis paraboloidal mirror 103,105 collimation focusing of off axis paraboloidal mirror, to
It surveys cigaratte filter and is moved to terahertz pulse focal position 104, penetrate the terahertz pulse of cigaratte filter through off axis paraboloidal mirror
105 focus on arrival terahertz detector 109, and time delay device permits the pass through cigaratte filter for controlling the optical delay time
Terahertz pulse and direct impulse simultaneously reach on terahertz detector 109, penetrate terahertz pulse and the spy of cigaratte filter
It surveys pulse interaction and generates current signal；Signal amplifier 110 receives and amplifies the current signal from detector, computer
For acquiring the current signal from signal amplifier, the collected current signal from signal amplifier of computer 111 is again
Referred to as terahertz signal or it is known as test signal, the signals of 111 pairs of computer acquisitions are analyzed, and test signal and pre- is obtained
It is marked with the signal peak number of calibration signal, the peak-to-peak value of signal peak and degree of fitting etc., passes through test signal and preset standard signal
Comparison whether judge in cigaratte filter to be measured comprising quick-fried pearl.Whether the device can nondestructively detect in cigaratte filter comprising quick-fried
Pearl, and detect high reliablity.Wherein, the detailed process that the signal that computer 111 inputs is analyzed is in above-mentioned cigaratte filter
The detection method of quick-fried pearl has been carried out detailed explanation, and details are not described herein.
The detection device of quick-fried pearl in above-mentioned cigaratte filter is received and is shone after light beam is radiated on cigaratte filter to be measured
Light beam after penetrating cigaratte filter to be measured, and test signal is generated according to the light beam received, it then will test signal and pre- bidding
Calibration signal compares, and judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured.Preset standard signal includes pair
The signal that standard cigarette filter tip is detected in the case where including quick-fried pearl in filter tip by comparing test signal and is preset
Whether contain quick-fried pearl in the similarity judgement of standard signal cigaratte filter to be measured.The device passes through signal multilevel iudge perfume (or spice) to be measured
Whether quick-fried pearl is contained in cigarette filter tip, and detection is accurate, detects high reliablity.
In one embodiment, Fig. 6 is referred to, a kind of terahertz time-domain spectroscopy on-line detecting system, including test are provided
The detection device of quick-fried pearl in platform 201 and above-mentioned cigaratte filter.Testboard 201 is quick-fried in cigaratte filter for placing cigaratte filter
The position of the detection device of pearl is constant, for the cigaratte filter by thz beam focal position 104 on testboard into
Row detection.In the present embodiment, when being detected using the system to cigaratte filter, cigarette sample 202 is disposed vertically along Z-direction
In on the testboard 201 of the uniform motion along the x axis in X/Y plane, the movement of testboard 201 is to drive sample in X-axis side
To at the uniform velocity moving, testboard 201 drives the every cigaratte filter at the uniform velocity moved by the poly- of the thz beam from Y direction
When burnt position 104, computer 111 will collect the test signal of every cigaratte filter within the time at equal intervals；The device can
To realize the on-line checking of cigaratte filter sample.Certainly, other placement directions of cigaratte filter and moving direction are also in the present invention
Protection scope within, as long as the placement direction and moving direction of cigarette and the direction of illumination of thz beam are coordinated, not shadow
Ring test accuracy.
Above-mentioned terahertz time-domain spectroscopy on-line detecting system is received after light beam is radiated on cigaratte filter to be measured
Light beam after irradiating cigaratte filter to be measured, and according to the light beam generation test signal received, it then will test signal and preset
Standard signal compares, and judges to obtain testing result whether containing quick-fried pearl in cigaratte filter to be measured.Preset standard signal includes
The signal detected in the case where including quick-fried pearl in filter tip to standard cigarette filter tip, by comparing test signal and in advance
It is marked in the similarity judgement cigaratte filter to be measured of calibration signal and whether contains quick-fried pearl.Cigaratte filter is examined using the system
When survey, cigarette sample 202 is placed on testboard 201, and the movement of testboard drives cigarette sample movement, every cigaratte filter warp
When over-focusing position 104, computer 111 will collect the test signal of cigaratte filter, realize on-line checking.The system passes through
Whether quick-fried pearl is contained in signal multilevel iudge cigaratte filter to be measured, and detection is accurate, detects high reliablity.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. the detection method of quick-fried pearl in a kind of cigaratte filter, which comprises the following steps:
Light beam is radiated on cigaratte filter to be measured；
The light beam after irradiating the cigaratte filter to be measured is received, and test signal is generated according to the light beam received；
The test signal is compared with preset standard signal, judges whether contain quick-fried pearl in the cigaratte filter to be measured,
Obtain testing result；The preset standard signal includes examining in filter tip in the case where including quick-fried pearl to standard cigarette filter tip
The signal measured.
2. the detection method of quick-fried pearl in cigaratte filter according to claim 1, which is characterized in that the preset standard signal
It further include the signal detected in the case where not including quick-fried pearl in filter tip to standard cigarette filter tip.
3. the detection method of quick-fried pearl in cigarette holder according to claim 1, which is characterized in that by the test signal and in advance
Before bidding calibration signal compares, further includes:
Light beam is radiated on standard cigarette filter tip；
The light beam after irradiating the standard cigarette filter tip is received, and preset standard signal is generated according to the light beam received.
4. the detection method of quick-fried pearl in cigaratte filter according to claim 1, which is characterized in that the test signal and institute
Stating preset standard signal is time-domain signal.
5. the detection method of quick-fried pearl in cigaratte filter according to claim 4, which is characterized in that the light beam is Terahertz
Light beam, the light beam received after irradiating the cigaratte filter to be measured, and the step for testing signal is generated according to the light beam received
Suddenly, comprising:
The thz beam after irradiating the cigaratte filter to be measured is received, and test letter is obtained according to the thz beam received
Number.
6. the detection method of quick-fried pearl in cigaratte filter according to claim 1, which is characterized in that described to believe the test
The step of number comparing, whether being judged in the cigaratte filter to be measured containing quick-fried pearl with preset standard signal, including following step
It is rapid:
Obtain the signal peak number of the test signal and the signal peak number of the preset standard signal；
Obtain the peak-to-peak value of the test signal and the peak-to-peak value of the preset standard signal；
Whether signal peak number and the signal peak number of the preset standard signal for comparing the test signal are equal, and sentence
The peak-to-peak value for testing signal break whether within the scope of the preset threshold of the peak-to-peak value of the preset standard signal, is compared
And judging result, determine in the cigaratte filter to be measured whether contain quick-fried pearl according to the comparison and judging result.
7. the detection method of quick-fried pearl in cigaratte filter according to claim 6, which is characterized in that described to obtain the test
Before the step of peak-to-peak value of the peak-to-peak value of signal and the preset standard signal, the peak-to-peak value of the preset standard signal is preset
Threshold range.
8. the detection method of quick-fried pearl in cigaratte filter according to claim 1, which is characterized in that described to believe the test
The step of number comparing, whether being judged in the cigaratte filter to be measured containing quick-fried pearl with preset standard signal, including following step
It is rapid:
Calculate the degree of fitting of the test signal and the preset standard signal；
Judge whether contain quick-fried pearl in the cigaratte filter to be measured.
9. the detection method of quick-fried pearl in cigaratte filter according to claim 1, which is characterized in that the cigaratte filter to be measured
It is all the same with the brand and model and placement direction of the standard cigarette filter tip.
10. the detection device of quick-fried pearl in a kind of cigaratte filter, which is characterized in that including terahertz emission source, terahertz detector,
Signal amplifier and computer；The terahertz emission source is moved to described for generating thz beam, cigaratte filter to be measured
Thz beam focal position；The terahertz detector receives the thz beam after irradiating the cigaratte filter to be measured, and
The thz beam received is transformed into current signal；The current signal of generation is passed through the letter by the terahertz detector
Output realizes the acquisition of test signal to the computer after number amplifier；The computer be used for the test signal and
Preset standard signal compares, and judges to obtain testing result whether containing quick-fried pearl in the cigaratte filter to be measured.
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