CN2921829Y - Cigarette pack density on-line detecting device - Google Patents

Abstract

The utility model discloses an online self verifying device for cigarette packet density, the device comprises a plurality of detecting units, a support, a position sensor and a data capture and processing system, etc; the detecting unit comprises a plurality of radioactive sources or X ray sources and a plurality of ray detectors, the radioactive sources and the detectors are respectively arranged on the support at the two sides of detected cigarette packet and constitute a plurality of detecting unit, with one corresponding to another one; the density of the detecting points on the cigarette packet are detected, the following can be calculated out according to the density value of detecting points: the maximum deviation of a maximum density value and a mean value = (maximum density value - density mean value) / density mean value while the maximum deviation of a minimum density value and a mean value b = (minimum density value - density mean value)/ density mean value. Based on that the maximum value in a and b absolute value should be less and equal than the given value, the unqualified cigarette packet, the value of which is more than the given value, is eliminated by an eliminator. The device can conduct an online non-destructive test with high detecting accuracy, stability and reliability.

Description

Cigarette package denseness on-line detection device

Technical field

The utility model relates to online measuring technique, especially a kind of cigarette package denseness on-line detection device.

Background technology

The homogeneity of cigarette package denseness is one of key factor that influences tobacco bale storage fermentation (alcoholization) quality.At present, each flue-cured tobacco factory all adopts static 9 sampling methods that cigarette package denseness is detected, being about to 9 sampling plates (as Fig. 1) is placed on above the tobacco bale, depress 15mm, aim at 9 points of model with the density sampler, press sample thief respectively, pressing the degree of depth of sample thief is 600mm or 500mm, take out 9 samples respectively, pack in the polybag of homogenous quantities and the label of annotating, then, weigh out the weight of each point sample respectively in the balance, and calculate the density value of 9 points, mean value, maximal value, minimum value, the maximum deviation a=of density maximal value and mean value (density maximal value-density mean value)/density mean value, the maximum deviation of density minimum value and mean value=(density minimum value-density mean value)/density mean value, then use a, maximal value≤set-point in the b absolute value (0.1) judges that being less than or equal to set-point is specification product, is considered as substandard product greater than the product of this value.Every batch of each grade products is by 2% sampling observation, less than 100 casees also to inspect 2 casees by random samples.

There is following shortcoming in prior art:

(1) during the hand sampling check fee, effort;

What (2) product is carried out is destructive the detection, causes waste;

(3) 2% sampling observation rate can not reflect the actual product quality of 100% product truly;

(4) sampling detects in warehouse for finished product, and this hysteresis sampling can not in time feed back to baling press adjustment with the information that detects.

Summary of the invention

The technical problems to be solved in the utility model is, a kind of cigarette package denseness on-line detection device is provided, this device can not destroy under the situation of tobacco bale aborning, fast detecting goes out each monitoring point density, thereby can detect substandard product, rejected by device for eliminating, and given baling press with the information feedback of substandard product simultaneously, so that baling press is adjusted in real time.

For achieving the above object, the cigarette package denseness on-line detection device that the utility model provides comprises: several detecting units, support, data acquisition processing system, it is characterized in that, described several detecting units, comprise several radioactive sources or x-ray source and several ray detectors, described radioactive source or x-ray source and ray detector are corresponding one by one to be installed on the support of tested tobacco bale both sides, and the detector of described several detecting units is connected with data acquisition processing system by cable.

Above-mentioned cigarette package denseness on-line detection device is characterized in that, this device also comprises position transducer, and this position transducer is installed in the both sides of detecting unit the place ahead conveying belt, and the installation site of position transducer will guarantee that each detecting unit is corresponding with check point.

Above-mentioned cigarette package denseness on-line detection device is characterized in that, this device also comprises device for eliminating, and described device for eliminating comprises support, driver, push rod and position transducer.When pick-up unit detects defective tobacco bale, disposal system is sent the signal enabling device for eliminating, and when defective tobacco bale moved to the position transducer place of device for eliminating, position transducer sent signal, stop conveying belt, defective tobacco bale is rejected by the driver drives push rod of device for eliminating.

Above-mentioned cigarette package denseness on-line detection device is characterized in that, described radioactive source can be selected for use ⁶⁰Co, ¹³⁷Cs, ²⁴¹Am or X source can be selected the X-ray pipe for use.

Above-mentioned cigarette package denseness on-line detection device is characterized in that, described ray detector is selected NaI scintillation counter or plastic scintillation counter or ionization chamber or proportional counter tube or G-M pipe for use.

Above-mentioned cigarette package denseness on-line detection device is characterized in that, described position transducer adopts photoelectrical position sensor.

The utility model has been realized cigarette package denseness non-destructive online automatic detection, has solved the long-term unsolved difficult problem of the online detection of cigarette package denseness, compared with prior art has following benefit:

The non-destructive online auto monitoring has replaced destructive hand sampling to detect, and has saved human and material resources, has improved automatization level;

Tobacco bale has been realized 100% monitoring, has guaranteed the tobacco bale quality;

In real time testing result is fed back to baling press, make baling press in time adjust running parameter, improved the tobacco bale qualification rate, reduced production cost, improved economic benefit.

Description of drawings

9 method sampling plates of static sampling Detection synoptic diagram when Fig. 1 a, Fig. 1 b;

Fig. 2 a, Fig. 2 b detect nine check point denseness on-line detection devices of tobacco bale synoptic diagram simultaneously;

Fig. 3 a, Fig. 3 b are that the branch moved further detects cigarette package denseness pick-up unit synoptic diagram;

Fig. 4 a, Fig. 4 b, Fig. 4 c are branch moved further testing process synoptic diagram;

Wherein Reference numeral is:

10-sampling plate

11-thief hole

21-support

22-radioactive source or x-ray source

23-tobacco bale

24-tobacco bale travelling belt

25-detector

26-data acquisition processing system

27-device for eliminating

28,28 ', 28 "-position transducers

Embodiment

Further describe the technical solution of the utility model below in conjunction with accompanying drawing:

With reference to figure 2a, 2b and Fig. 3 a, 3b, cigarette package denseness on-line detection device of the present utility model comprises several detecting units, this detecting unit comprise several radioactive sources or x-ray source 22 and several detectors 25, support 21, position transducer 28 (28 ', 28 "), data acquisition processing system 26 and device for eliminating 27 (, being assumed to be m radioactive source or x-ray source and m detector) for ease of explanation.Wherein radioactive source 22 and detector 25 are installed in respectively on the support 21.Detector 25, position transducer 28 and device for eliminating 27 usefulness cables are connected with data acquisition processing system 26, tobacco bale between radioactive source 22 and detector 25 by accepting detection.M radioactive source or x-ray source 22, and m detector 25 is installed in the both sides (up and down or about or front and back) of tested tobacco bale respectively, particular location is by the determining positions of the required check point of tested tobacco bale, and radioactive source or x-ray source 22 are corresponding one by one with detector 25, constitute m detecting unit.The size of m is by how much the deciding of cigarette package denseness check point, and the distribution of detecting unit and position each other also are to need the distribution of check point and each other relative position decision by tobacco bale, and the two is corresponding one by one.For example: 9 point samplings that corresponding Static Detection is at present used, then m=9.9 detecting units will be corresponding one by one with 9 check point a, b, c, d, e, f, g, h, i as A, B, C, D, E, F, G, H, I.Be A-a, B-b, C-c, D-d, E-e, F-f, G-g, H-h, I-i.

M point to tobacco bale need detect as m=9 or 12 or 16, then forms 3 * 3,3 * 4,4 * 4 dot matrixs respectively and arranges, and once detects m point simultaneously.As shown in Figure 2.

In order to reduce the quantity of detecting unit, adopt tobacco bale to divide moved further to detect, with reference to figure 3a, 3b and Fig. 4 a, 4b, 4c, as m=3 (or 4,5), 3 detecting units are in one line, and requirement and tobacco bale moving direction are perpendicular, tobacco bale whenever moves once, detect 3 points (a, b, c), moving moves a step again detects d, e, f point, and final step detects the value that g, h, i are ordered.

Tobacco bale branch moved further is to be determined by position transducer 28 controls, as m=3, A is arranged, B, three detecting units of C, examined point 9 points, in view of the above, be subjected on the relevant position, inspection place the place ahead position transducer 28 to be installed at tobacco bale, 28 ', 28 ";; the installation of position transducer 28 will guarantee detecting unit A; B; C and check point a; b, c is corresponding one by one, the installation site of position transducer 28 ' will guarantee detecting unit A, B, C and check point d, e, f is corresponding one by one, position transducer 28 " the installation site to guarantee detecting unit A; B; C and check point g; h; i is corresponding one by one; when tobacco bale is examined, when tobacco bale moves to position sensor 28 positions, position transducer 28 sends signal and stops conveying belt, data handling system is sent signal A, B, the C detecting unit begins a, b, three check points of c detect, after finishing, detection sends the signal enabling conveying belt, tobacco bale begins to move, when tobacco bale move to position sensor 28 ' time, position transducer 28 ' sends signal and stops conveying belt, data handling system is sent signal A, B, the C detecting unit begins d, e, three check points of f detect, after finishing, detection sends the signal enabling conveying belt, tobacco bale begin to move to position transducer 28 " time; position transducer 28 " sends signal and stops conveying belt, A, B, the C detecting unit begins g, h, three check points of i detect, and tobacco bale moves A three times, B, the C detecting unit is finished the detection of 9 check points.

Device for eliminating 27 in the cigarette package denseness on-line detection device is made up of support, driver, push rod and position transducer, when data acquisition processing system 26 detects defective tobacco bale, sending the signal enabling device for eliminating starts working, when defective tobacco bale moves to the position transducer place of device for eliminating 27, position transducer sends signal and stops conveying belt, the driver of device for eliminating 27 is started working, and drives push rod defective tobacco bale is released outside the conveying belt.

The used radioactive source of cigarette package denseness on-line automatic detection device can be selected for use ⁶⁰Co, ¹³⁷Cs, ²⁴¹Am; X source is selected x ray generator (X-ray pipe) for use; Detector can be selected NaI scintillation counter or plastic scintillation counter or ionization chamber or proportional counter tube or G-M pipe for use.

The mathematical model that this pick-up unit detecting unit adopts is set up the radiation absorption law according to material, and the radiation absorption law has two kinds of expression forms: F=k ln (N _i/ N ₀) and F=k[ln (N _i/ N ₀)] ^{1+ δ}, the utility model is with F=k ln (N _i/ N ₀) set forth for example.

In order to eliminate the influence of statistic fluctuation, increase detection time t time-sampling second n time, so the mathematical model of m detecting unit is as follows:

${\mathrm{<figure-callout\; id="1"\; label="F"\; filenames="Y20062002303300121.png,Y20062002303300141.png"\; state="\{\{state\}\}">F</figure-callout>}}_1=\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_1\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)}{n}------\left(1\right)$

$F_2=\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_2\mathrm{Ln}\left(\frac{N_{i2}}{N_{02}}\right)}{n}------\left(2\right)$

.........

$F_{m-1}=\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_{m-1}\mathrm{Ln}\left(\frac{N_{\mathrm{im}-1}}{N_{0m-1}}\right)}{n}------(m-1)$

$F_m=\frac{\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_m\mathrm{Ln}\left(\frac{N_{\mathrm{im}}}{N_{0m}}\right)}{n}------\left(m\right)$

F in the formula ₁～F _mBe respectively the tobacco leaf weight (g/cm on the tobacco bale check point place unit area ²); N ₀₁～N _0mThe counting of detector unit interval during for no material (individual/second); N _I1～N _ImThe counting of detector unit interval when material is arranged (individual/second); k ₁～k _mBe the material calibration coefficient; N is a sampling number.

If it is S that detector records the floorage at tobacco bale check point place, the height of tobacco bale is H, because tobacco bale height unanimity, so the H=constant, then the volume of detected tobacco leaf is V=SH; Detect the weight W=FS of tobacco leaf, the density of tobacco leaf $\mathrm{\&rho;}=\frac{W}{V}=\frac{\mathrm{FS}}{\mathrm{SH}}=\frac{F}{H},$ The density mathematical model that can draw tobacco bale thus is:

${\mathrm{\&rho;}}_1=\frac{F_1}{H}=\underset{i=1}{\overset{\mathrm{<figure-callout\; id="1"\; label="n\; k"\; filenames="Y20062002303300121.png,Y20062002303300141.png"\; state="\{\{state\}\}">n</figure-callout>}}{\mathrm{\&Sigma;}}}{k}_{}{}_1\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n\&CenterDot;H$

${\mathrm{\&rho;}}_2=\frac{F_2}{H}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_2\mathrm{Ln}\left(\frac{N_{i2}}{N_{02}}\right)/n\&CenterDot;H$

.........

${\mathrm{\&rho;}}_{m-1}=\frac{F_{m-1}}{H}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_{m-1}\mathrm{Ln}\left(\frac{N_{i_{m-1}}}{N_{\mathrm{om}-1}}\right)/n\&CenterDot;H$

${\mathrm{\&rho;}}_m=\frac{F_m}{H}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{k}_m\mathrm{Ln}\left(\frac{N_{\mathrm{im}}}{N_{0m}}\right)/n\&CenterDot;H$

This shows that ρ and F are proportional, so, detect F and also mean detection ρ.Make K ₁=k ₁/ H; K ₂=k ₂/ H; K _M-1=k _M-1/ H; K _M=k _M/ H; Then following formula can be changed into:

${\mathrm{\&rho;}}_1=\underset{i=1}{\overset{\mathrm{<figure-callout\; id="1"\; label="n\; K"\; filenames="Y20062002303300121.png,Y20062002303300141.png"\; state="\{\{state\}\}">n</figure-callout>}}{\mathrm{\&Sigma;}}}{K}_{}{}_1\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n------{\left(1\right)}^{,}$

${\mathrm{\&rho;}}_2=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{K}_2\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n------{\left(2\right)}^{,}$

------

${\mathrm{\&rho;}}_{m-1}=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{K}_{m-1}\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n------{(m-1)}^{,}$

${\mathrm{\&rho;}}_m=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{K}_m\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n------{\left(m\right)}^{,}$

(1) ', (2) ',------, (m-1) ', (m) ' be the mathematical model that the used cigarette package denseness of the utility model detects.

This mathematical model needs N before detection ₀₁... N _OmThe tobacco leaf of demarcating and using known density is respectively to K ₁, K _mDemarcate.

M detecting unit measured the tobacco leaf density of a tobacco bale m check point, and the density value of the tobacco leaf of each check point that the data handling system utilization records calculates density mean value, maximal value, minimum value, a=(density maximal value-density mean value)/density mean value, the b=(density minimum value-density mean value)/density mean value of m check point.Then judge with the maximal value≤set-point in a, the b absolute value, the disallowable device of underproof tobacco bale is rejected, give baling press with the tobacco leaf density maximal value and the information feedback such as minimum value and present position thereof that record simultaneously, running parameter to baling press is adjusted, to guarantee the quality of tobacco bale.

Detecting below in conjunction with 9 method samplings of the static density of each flue-cured tobacco station-service at present is example, and the specific implementation method of cigarette package denseness pick-up unit of the present utility model is described:

The cigarette package denseness pick-up unit of present embodiment comprises three ¹³⁷Cs radioactive source, this radiation intensity are 50mc _i(millicurie) point source; 3 NaI scintillation counters, wherein NaI is of a size of Φ 50mm * 50mm; The support of band shell; 3 photoelectrical position sensors; Contain device for eliminating electronic or air impeller and photoelectrical position sensor; Contain S ₇-300CPU, A/D, D/A, open into/, leave the plc data acquisition processing system of module, TP-27 touch-screen and form.Wherein 3 radioactive sources and 3 detectors are installed in respectively on the top support and below support of tobacco bale conveying belt, and 3 detecting unit A of corresponding one by one composition, B, C, the mutual size of three detecting units and the sampling spot a of 9 sampling plates, b, c is corresponding, 3 photoelectrical position sensors are installed in detecting unit A, B, the place ahead of C, the top, both sides of conveying belt, distance apart from conveying belt is 360mm, photoelectrical position sensor 28 installation sites are apart from detecting unit A, B, the distance on plane, C place is 127mm, photoelectrical position sensor 28,28 ', 28 " between distance equate; be 381mm; the photoelectrical position sensor installation site will guarantee to move when detecting, A; B; C detecting unit and check point a; b, c; D, e, f; G, h, i are corresponding, device for eliminating be installed in photoelectrical position sensor 28 " appropriate location, conveying belt side, back.

The detector of detecting unit, photoelectrical position sensor, device for eliminating link to each other with the plc data acquisition processing system with cable, and PLC outputs signal to baling press.Shown in Fig. 3 a, Fig. 3 b

Adopt this device just can realize the online detection of portable cigarette package denseness.Further set forth device of the present utility model below in conjunction with this pick-up unit and how to realize the online detection of cigarette package denseness, specifically comprise the steps

Step 1: demarcate in advance before the detection.This step further comprises

(1) 3 detecting unit adopts mathematical model to be:

${\mathrm{\&rho;}}_1=\underset{i=1}{\overset{\mathrm{<figure-callout\; id="1"\; label="n\; K"\; filenames="Y20062002303300121.png,Y20062002303300141.png"\; state="\{\{state\}\}">n</figure-callout>}}{\mathrm{\&Sigma;}}}{K}_{}{}_1\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n$

${\mathrm{\&rho;}}_2=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{K}_2\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n$

${\mathrm{\&rho;}}_3=\underset{i=1}{\overset{n}{\mathrm{\&Sigma;}}}{K}_3\mathrm{Ln}\left(\frac{N_{i1}}{N_{01}}\right)/n$

Programme according to above mathematical model.

(2) demarcate N ₀₁, N ₀₂, N ₀₃

No material, the operation of conveying belt blanking bar, data acquisition processing system is gathered ray detector output signal N _I1, N _I2, N _I3, through t second, for example t=60 records N second _iMean value be N ₀₁, N ₀₂, N ₀₃Value supposes to record N ₀₁=5000/second, N ₀₂=5100/second, N ₀₃=5150/second, Zero calibration finishes.

(3) demarcate K ₁, K ₂, K ₃

With the known density tobacco leaf to K ₁, K ₂, K ₃Demarcate:

The tobacco leaf density of selecting tobacco bale a check point place is that known density is demarcated, and at first demarcates K ₁, be about to the corresponding section that tobacco bale a check point places detecting unit A, earlier K of supposition ₁Value is as K ₁=70, the input data acquisition processing system, this moment, the mathematical model of detecting unit A was: $\mathrm{\&rho;}=70\ln \left(\frac{N_i}{5000}\right)$

Demarcate beginning, data acquisition processing system is gathered a N _iAs N _i=2500, calculate one time ρ ₁=0.673, through t second such as t=60S, record: ${\mathrm{\&rho;}}_1=\underset{i=1}{\overset{60}{\mathrm{\&Sigma;}}}70\mathrm{Ln}\left(\frac{N_i}{5000}\right)/60=0.68g/{\mathrm{cm}}^3;$ Equally tobacco bale a check point is placed detecting unit B corresponding section to demarcate K ₂, suppose K equally ₂=70, and the input computing machine, the nominal time is 60 seconds also, records ρ ₂=0.70g/cm ³, same tobacco bale a check point places detecting unit C corresponding section to record ρ ₃=0.69g/cm ³.

With 9 method sampling plates, sampler is aimed at the sampling of a measurement point, and sample thief is weighed, and obtains a point cigarette package denseness ρ of place through calculating _Standard=0.45g/cm ³

Use ρ _StandardAnd ρ ₁, ρ ₂, ρ ₃K revised:

With K _{1 repaiies}, K _{2 repair}, K _{3 repair}, the input data acquisition processing system, finished K ₁, K ₂, K ₃Demarcation.

Step 2, online detection:

Detecting unit A, B, C are according to above-mentioned ρ ₁, ρ ₂, ρ ₃Mathematical model carry out online detection.Conveying belt starts the drive tobacco bale and moves forward, when tobacco bale reached photoelectrical position sensor 28, photoelectrical position sensor 28 signalling conveying belt stopped, and detecting unit A, B, C aim at a, b at this moment, the c check point detects, as measurement time t=30 second, record: ρ _a=0.451g/cm ³, ρ _b=0.448g/cm ³, ρ _c=0.459g/cm ³, measure the startup conveying belt that finishes, tobacco bale moves forward, tobacco bale moves on to photoelectrical position sensor 28 ' time, photoelectrical position sensor 28 ' and sends the signal conveys band and stop, and detecting unit A, B, C aim at d, e, the f check point detects, measurement time t=30 second record: ρ _d=0.445g/cm ³, ρ _e=0.452g/cm ³, ρ _f=0.442g/cm ³, measure the startup conveying belt that finishes, tobacco bale moves forward, tobacco bale move on to photoelectrical position sensor 28 " time, photoelectrical position sensor 28 " send the signal conveys band and stop, recording equally:

ρ _g＝0.458g/cm ³、ρ _e＝0.452g/cm ³、ρ _i＝0.455g/cm ³.

Step 3, data processing:

After the pending data acquisition processing system has been surveyed the density value of 9 measurement points, carry out data processing, the ρ that offside gets _a, ρ _b, ρ _c, ρ _d, ρ _e, ρ _f, ρ _g, ρ _e, ρ _iValue is calculated, and draws ρ _{On average}=0.4503; ρ _Max=ρ _c=0.459; ρ _Min=ρ _f=0.442; A=(ρ _Max-ρ _{On average})/ρ _{On average}=(0.459-0.4503)/0.4503=0.02; Calculate b=-0.018 equally.

Step 4, judge:

Maximal value is a=0.02 in a, the b absolute value, comparing with a=0.02 and set-point, is 0.1 as set-point, and then a is less than set-point, this tobacco bale is that certified products pass through to detect, if a, judges then that it is a substandard product greater than set-point, data handling system starts device for eliminating work, when tobacco bale moves to the photoelectrical position sensor of device for eliminating, photoelectrical position sensor sends the signal conveys band to be stopped, and the device for eliminating drive operation drives push rod tobacco bale is released outside the conveying belt.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims (6)

1, a kind of cigarette package denseness on-line detection device, comprise several detecting units, support, data acquisition processing system, it is characterized in that, described detecting unit comprises several radioactive sources or x-ray source and several ray detectors, described radioactive source or x-ray source and detector correspondence one by one are installed in tested tobacco bale both sides, and the detector of described detecting unit is connected with data acquisition processing system by cable.

2, cigarette package denseness on-line detection device according to claim 1, it is characterized in that, this device also comprises at least one position transducer, this position transducer is installed in the both sides of detecting unit the place ahead conveying belt, and the installation site of position transducer will guarantee that each detecting unit is corresponding with check point.

3, cigarette package denseness on-line detection device according to claim 1, it is characterized in that, this device also comprises device for eliminating, this device for eliminating comprises support, driver, push rod and position transducer, when data handling system detects defective tobacco bale, disposal system is sent the signal enabling device for eliminating, when defective tobacco bale moves to the position transducer place of device for eliminating, position transducer sends signal and stops conveying belt, by the driver drives push rod of device for eliminating defective tobacco bale is released outside the conveying belt.

4, cigarette package denseness on-line detection device according to claim 1 is characterized in that, described radioactive source is selected for use ⁶⁰Co, ¹³⁷Cs, ²⁴¹Am, described x-ray source is selected x ray generator for use.

5, cigarette package denseness on-line detection device according to claim 1 is characterized in that, described detector is selected Na I scintillation counter or plastic scintillation counter or ionization chamber or proportional counter tube or G-M pipe for use.

According to claim 2 or 3 described cigarette package denseness on-line detection devices, it is characterized in that 6, described position transducer adopts photoelectrical position sensor.

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