Radiation type method and system for measuring filled value of cut tobacco

A technology of radiation measurement and filling value, which is applied in the fields of material analysis using radiation, tobacco, and cigarette manufacturing, etc. It can solve undisclosed problems and achieve good stability, small maintenance, and high reliability.

Inactive Publication Date: 2004-07-21
北京邦瑞达机电设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the patent No. ZL 00 2 35663.5 proposes weighing by radiation method, it does not disclose how to specifically solve the above two problems

Method used

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  • Radiation type method and system for measuring filled value of cut tobacco
  • Radiation type method and system for measuring filled value of cut tobacco
  • Radiation type method and system for measuring filled value of cut tobacco

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] The mathematical model used d=h i / K[ln(U i / U 0 )] (1±δ) , set δ=0 in the formula, and the calibration coefficient K is the d of the known filling value 0 Tobacco is calibrated to determine K=K 0 ,Specific steps are as follows:

[0092] K 1 = 20, and input it into the computer, after the conveyor runs empty for 3 minutes, the measured V 0 =4.35, the average filling value d of shredded tobacco measured by static method 0 4.5cm 3 / g shredded tobacco is fed into the conveyor and passed through the pressure rollers and detectors. At this time, the computer collects the signals from the thickness measuring device and detectors, and within t seconds, measures the average height h of shredded tobacco 1 =4.88cm, the average value U of the output voltage signal of the detector 1 =4.1V, finally, the computer calculates the filling value of shredded tobacco

[0093] d 1 = h 1 / K 1 [ln(U i / U o )]=4.12cm 3 / g, then,

[0094] use d 0 =4.5cm 3 / g, d 1 =4.12cm 3 / g...

Embodiment 2

[0100] The mathematical model used is: d=hi / K[ln(Ui / U0)](1±δ), where δ is a constant between -0.2-+0.2, and the K value is based on the known shredded tobacco filling value d0 The shredded tobacco is calibrated multiple times in kind, and the K and δ values ​​are comprehensively determined, as in Example 1, to determine K=18.342, and δ is -0.0116, and the control system is based on the measured hi according to the formula:

[0101] d=h i / K[ln(U i / U 0 )] (1±δ) = h i / 18.342*[ln(U i / U 0 )] 1.0116 , find the filling value.

Embodiment 3

[0103] The mathematical model used d=h i / K[ln(U i / U 0 )] (1±δ) , let the δ in the formula be a certain constant between 0-0.2, and K be the shredded tobacco thickness function, that is, K=f(h i ).

[0104] In the implementation of the present invention, since the thickness of the shredded tobacco on the belt 11 is different, the influence of the scattering factor is also different, so K cannot be regarded as a constant, so the shredded tobacco thickness h must be obtained i with coefficient K i The change relationship between, the method is: with the known same d value of tobacco, at different thickness h 1 、h 2 ... h i In the case of , the coefficient K is calibrated, and the corresponding K is obtained 1 、K 2 ...K i , get h i with K i The change relationship curve, and then use the curve fitting method to get h i and K i The relationship between changes is stored in the computer control system 1. When measuring the filling value of shredded tobacco, accordin...

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Abstract

A method and system for measuring the fill factor of tobacco shreds is disclosed. A gamma-ray emitter and a gamma-ray detector are respectively arranged over and under conveying belt. A roller-type thickness measurer is arranged above the conveying belt before said gamma-ray emitter. The output voltage of gamma-ray detector is Uo for no tobacco shreds and U1 for the pressed tobacco shreds. The thickness of tobacco shreds is measured to be hi. The fill factor of tobacco shreds is calculated out by a processor according to said Uo, U1 and hi.

Description

technical field [0001] The invention relates to a tobacco processing technology and equipment, in particular to a method and system for measuring the filling value of shredded tobacco. Background technique [0002] Filling value is one of the important factors affecting the quality of rolled cigarettes. When the filling value is large, the amount of shredded tobacco used in the rolled cigarette is less, the cigarette has better air permeability when burning, and the content of tar, nicotine and carbon monoxide in the smoke is also less. Good; when the filling value is small, the rolled cigarette has a lot of shredded tobacco, the air permeability of the cigarette is poor when it is burned, the tar, nicotine and carbon monoxide content in the smoke are also high, and the taste is poor. Therefore, measuring the filling value of shredded tobacco in time and controlling the production of shredded tobacco with high filling value are of great significance to improving the quality ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24C5/34G01N23/02
Inventor 邸生才
Owner 北京邦瑞达机电设备股份有限公司
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