CN103969423B - Based on pressure sensing cigarette package tracing paper tightness detection method and device - Google Patents
Based on pressure sensing cigarette package tracing paper tightness detection method and device Download PDFInfo
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Abstract
The present invention is open a kind of based on pressure sensing cigarette package tracing paper tightness detection method and device.The method comprises: the inside and outside portion environmental stress being placed in the tobacco bale of airtight container is adjusted to the first identical pressure P1; Tobacco bale external environment condition pressure is adjusted to the second pressure P2, and make tobacco bale inside and outside portion environment produce pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1; Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance; According to the tobacco bale external environment condition pressure values in each moment, obtain pressure change curve; According to pressure change speed determination cigarette package tracing paper tightness.The present invention to detect tightness that is soft, Hard Roll cigarette package tracing paper simultaneously, thus according to the size of tightness carrying out the enclosed mechanism of appropriate adjustment cigarette packer, makes cigarette still keep good quality when long-time storage; The invention belongs to non-damaged data, repeatedly duplicate detection can be carried out to single bag cigarette.
Description
Technical field
The present invention relates to technical field of cigarette detection, particularly one is based on pressure sensing cigarette package tracing paper tightness detection method and device.
Background technology
Cigarette package tracing paper tightness is the important physical index of cigarette in process of production one, the leakage of cigarette fragrance when good tightness effectively can prevent cigarette long-time storage, reduce the impact of extraneous humiture on cigarette and the loss of moisture, extend the storage time of cigarette.The cigarette of tightness difference then can cause cigarette fragrance to be revealed because storage time is long, external environment change also can cause cigarette dry and cracked with go mouldy, the serious quality that have impact on cigarette.
In production of cigarettes, due to the effect of many factors, at tobacco bale film folding and forming and be transported in the process of flatiron Iron unit, the problems such as tobacco bale film is lax, wrinkling, bubble has been seared up in side, be not adjacent to may be produced, thus have influence on the tightness of cigarette package tracing paper.
Produce the cigarette with excellent sealing degree, need the enclosed mechanism of the adjustment cigarette packer of appropriateness, cigarette just can be made can also to remain good quality when long-time storage.Appropriateness the enclosed mechanism of cigarette packer can be regulated, so the tightness size measuring cigarette case is put most important targetedly when knowing the tightness size of cigarette case.And existing cigarette package tracing paper tightness measuring technology can only detect the tightness of Soft Roll cigarette package tracing paper.
Summary of the invention
In view of above technical matters, the invention provides a kind of based on pressure sensing cigarette package tracing paper tightness detection method and device, tightness that is soft, Hard Roll cigarette package tracing paper can be detected simultaneously, thus according to the size of tightness the enclosed mechanism of appropriate adjustment cigarette packer can be carried out, make cigarette still keep good quality when long-time storage.
According to an aspect of the present invention, provide a kind of based on pressure sensing cigarette package tracing paper tightness detection method, comprising:
The inside and outside portion environmental stress being placed in the tobacco bale of airtight container is adjusted to the first identical pressure P1;
Tobacco bale external environment condition pressure is adjusted to the second pressure P2, and make tobacco bale inside and outside portion environment produce pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1;
Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance;
According to the tobacco bale external environment condition pressure values in each moment, obtain pressure change curve;
According to pressure change speed determination cigarette package tracing paper tightness.
Preferably, described first pressure P1 is less than standard atmospheric pressure.
Preferably, when described first pressure P1 is not equal to standard atmospheric pressure, described step tobacco bale external environment condition pressure being adjusted to the second pressure P2 comprises: the electrically-controlled valve opening airtight container makes container communicate with air, and quick closedown electrically-controlled valve, make tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously.
Preferably, airtight container volume is 1.5-3 times of tobacco bale volume.
Preferably, the tobacco bale that volume is identical, the pressure values when tobacco bale inside and outside portion pressure reaches balance is identical.
According to a further aspect in the invention, there is provided a kind of based on pressure sensing cigarette package tracing paper tightness pick-up unit, comprise initial pressure setting unit, external pressure adjustment unit, pressure transducer, pressure curve acquiring unit, tightness acquiring unit, wherein:
Initial pressure setting unit, the inside and outside portion environmental stress for the tobacco bale by being placed in airtight container is adjusted to the first identical pressure P1;
External pressure adjustment unit, for tobacco bale external environment condition pressure is adjusted to the second pressure P2, make tobacco bale inside and outside portion environment produce pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1;
Pressure transducer, for Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance;
Pressure curve acquiring unit, for the tobacco bale external environment condition pressure values according to each moment, obtains pressure change curve;
Tightness acquiring unit, for according to pressure change speed determination cigarette package tracing paper tightness.
Preferably, described initial pressure setting unit is that negative pressure produces equipment; Described first pressure P1 is less than standard atmospheric pressure.
Preferably, when described first pressure P1 is not equal to standard atmospheric pressure, described external pressure adjustment unit is the electrically-controlled valve of airtight container; Described electrically-controlled valve, makes container communicate with air for opening fast, and quick closedown makes tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously.
Preferably, airtight container volume is 1.5-3 times of tobacco bale volume.
Preferably, the tobacco bale that volume is identical, the pressure values when tobacco bale inside and outside portion pressure reaches balance is identical.
The present invention is based on pressure sensing cigarette package tracing paper tightness detection method and device, be applicable to quantitative measurment that is soft, rigid pack tracing paper tightness, tightness that is soft, Hard Roll cigarette package tracing paper can be detected rapidly; According to the measurement result of this index, the enclosed mechanism of being installed by appropriate adjustment kit, guarantees that the tightness of cigarette case package is good, the damp and mouldy and dry phenomenon such as frangible of the cigarette avoiding causing cigarette long-time storage to cause because of tightness difference; Detection method and device belong to non-damaged data, can carry out repeatedly duplicate detection to single bag cigarette, simple to operate, be easy to realize, testing efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram that the present invention is based on a pressure sensing cigarette package tracing paper tightness detection method embodiment.
Fig. 2 is the schematic diagram of pressure change curve in one embodiment of the invention.
Fig. 3 is the schematic diagram that the present invention is based on a pressure sensing cigarette package tracing paper tightness pick-up unit embodiment.
Fig. 4 is the schematic diagram that the present invention is based on pressure sensing another embodiment of cigarette package tracing paper tightness pick-up unit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing instructions.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 1 is the schematic diagram that the present invention is based on a pressure sensing cigarette package tracing paper tightness detection method embodiment.Preferably, the present embodiment can perform by the present invention is based on pressure sensing cigarette package tracing paper tightness pick-up unit.The principle that described method adopts is: when the inside and outside portion of tobacco bale produces pressure reduction (when external pressure is large), the gas of tobacco bale outside can enter into tobacco bale inside by the crack of tobacco bale, reaches tobacco bale inside and outside portion pressure identical; When the tobacco bale volume of different sealing degree is identical, the pressure keeping tobacco bale inside and outside is identical, it is identical that the tobacco bale of different sealing degree finally all can reach tobacco bale inside and outside portion pressure, but reach, time that external pressure is identical is different, namely tobacco bale external pressure rate of change is different, reflecting the tightness of cigarette package tracing paper by obtaining tobacco bale external pressure rate of change, finally reaching the object of the tightness size detecting cigarette package tracing paper.
As shown in Figure 1, the method can comprise the following steps:
Step 101, the inside and outside portion environmental stress being placed in the tobacco bale of airtight container is adjusted to the first identical pressure P1, wherein tobacco bale external environment condition pressure refers to the gas pressure intensity of tobacco bale perimeter in airtight container, and tobacco bale internal environment pressure refers to the gas pressure intensity in tobacco bale.
Preferably, described first pressure P1 can not destroy the tightness of cigarette package tracing paper.
Preferably, described first pressure P1 can be less than standard atmospheric pressure.
Preferably, step 101 can produce equipment execution by negative pressure (being less than the pressure of standard atmospheric pressure).
Preferably, step 101 can comprise: use minipump to produce equipment as negative pressure, take out negative pressure, make all to produce same subnormal ambient inside and outside tobacco bale to airtight container, wherein, the vacuum degree that airtight container is final can not destroy the tightness of cigarette package tracing paper.
Step 102, is adjusted to the second pressure P2 by tobacco bale external environment condition pressure, makes tobacco bale internal pressure keep the first pressure P1 constant simultaneously, so that tobacco bale inside and outside portion environment produces pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1.
Preferably, when described first pressure P1 is not equal to standard atmospheric pressure, described step tobacco bale external environment condition pressure being adjusted to the second pressure P2 can comprise: the electrically-controlled valve opening airtight container makes container communicate with air, and quick closedown electrically-controlled valve, make tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously, namely the second pressure P2 is standard atmospheric pressure; Make tobacco bale internal pressure keep the first pressure P1 constant simultaneously.The inside and outside portion of tobacco bale produces maximum differential pressure.
Step 103, Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance, after wherein tobacco bale inside and outside portion pressure reaches balance, tobacco bale external environment condition pressure values no longer changes.
Preferably, step 103 can be performed by high-speed response pressure transducer.
Preferably, after step 102, if the second pressure P2 is greater than the first pressure P1, then now tobacco bale external environment condition pressure is greater than tobacco bale internal pressure.Due to tobacco bale there is pressure reduction in inside and outside portion, the gas of tobacco bale outside can enter into tobacco bale inside by the crack of tobacco bale, tobacco bale external environment condition pressure can increase in time and reduce, tobacco bale internal pressure can increase in time and increase, finally reach tobacco bale inside and outside portion pressure identical, setting now tobacco bale external environment condition pressure is the 3rd pressure P3, then P3 meets P2>P3>P1.
Preferably, after step 102, if the second pressure P2 is less than the first pressure P1, then now tobacco bale external environment condition pressure is less than tobacco bale internal pressure.Due to tobacco bale there is pressure reduction in inside and outside portion, the gas of tobacco bale inside can enter into tobacco bale outside by the crack of tobacco bale, tobacco bale external environment condition pressure can increase in time and increase, tobacco bale internal pressure can increase in time and reduce, finally reach tobacco bale inside and outside portion pressure identical, setting now tobacco bale external environment condition pressure is the 3rd pressure P3, then P3 meets P1>P3>P2.
By Ideal Gas Pressure Expressions (1)
PV＝nRT (1)
Wherein, P refers to the pressure of ideal gas, and V is the volume of ideal gas, and n represents the amount of gaseous matter, and T then represents the thermodynamic temperature of ideal gas, and R is ideal gas constant.
When T and n is constant, when can obtain tobacco bale inside and outside portion environmental stress balance, the 3rd pressure P3 meets formula (2)
P1×V1+P2×V2＝P3×V3 (2)
Wherein V1 is tobacco bale volume, and V3 is airtight container volume, and the volume of tobacco bale external environment condition in V2 airtight container, V2 equals V3-V1.
From formula (2), when tobacco bale volume is equal with airtight container volume, it is identical that the tobacco bale for different sealing degree finally all can reach tobacco bale inside and outside portion pressure, and pressure during final pressure equilibrium is identical.
Preferably, the volume requirement of airtight container is moderate, requires that the pressure change of tobacco bale inside significantly can make the pressure change of airtight container.
Preferably, airtight container volume V3 can be 1.5-3 times of tobacco bale volume V1.
Step 104, according to the tobacco bale external environment condition pressure values in each moment, obtains pressure change curve.
Preferably, step 104 can comprise: the pressure values of adding up each moment, until tobacco bale inside and outside portion pressure finally can reach balance, pressure remains unchanged; The pressure values in matching each moment obtains pressure change curve.Fig. 2 is the change curve of tobacco bale external environment condition pressure from P2 to pressure equilibrium P3 obtained after utilizing the tobacco bale of the present invention to two kinds of same volumes, different sealing degree to test.
Step 105, according to pressure change speed determination cigarette package tracing paper tightness.
The tobacco bale of same volume, different sealing degree, the time of pressure change is different, and pressure when finally reaching pressure equilibrium is identical.Can be reflected the tightness of cigarette package tracing paper by pressure change speed, rate of change is larger, and tightness is less, otherwise tightness is larger for this reason.
As shown in Figure 2, curve 201, curve 202 are the pressure change curve that the first test tobacco bale and second tests tobacco bale respectively.For the tobacco bale of two kinds of same volumes, different sealing degree, time t1 due to the pressure change of the first test tobacco bale is less than the time t2 of the pressure change of the second test tobacco bale, therefore the pressure change speed of the first test tobacco bale is greater than the pressure change speed of the second test tobacco bale, and the packaging tracing paper tightness that finally can obtain the first test tobacco bale is greater than the packaging tracing paper tightness of the second test tobacco bale.
Based on the cigarette package tracing paper tightness detection method that the above embodiment of the present invention provides, tightness that is soft, Hard Roll cigarette package tracing paper can be detected rapidly; According to the measurement result of this index, the enclosed mechanism of being installed by appropriate adjustment kit, guarantees that the tightness of cigarette case package is good, the damp and mouldy and dry phenomenon such as frangible of the cigarette avoiding causing cigarette long-time storage to cause because of tightness difference; Detection method belongs to non-damaged data, can carry out repeatedly duplicate detection to single bag cigarette, simple to operate, be easy to realize, testing efficiency is high.
Fig. 3 is the schematic diagram that the present invention is based on a pressure sensing cigarette package tracing paper tightness pick-up unit embodiment.As shown in Figure 3, describedly comprise initial pressure setting unit 301, external pressure adjustment unit 302, pressure transducer 303, pressure curve acquiring unit 304, tightness acquiring unit 305 based on pressure sensing cigarette package tracing paper tightness pick-up unit, wherein:
Initial pressure setting unit 301, inside and outside portion environmental stress for the tobacco bale by being placed in airtight container is adjusted to the first identical pressure P1, wherein tobacco bale external environment condition pressure refers to the gas pressure intensity of tobacco bale perimeter in airtight container, and tobacco bale internal environment pressure refers to the gas pressure intensity in tobacco bale.
Preferably, described first pressure P1 can not destroy the tightness of cigarette package tracing paper.
Preferably, described first pressure P1 can be less than standard atmospheric pressure.
Preferably, described initial pressure setting unit 301 can be that negative pressure produces equipment.
Preferably, minipump can produce equipment as negative pressure, takes out negative pressure to airtight container, makes all to produce same subnormal ambient inside and outside tobacco bale, and wherein, the final vacuum degree of airtight container can not destroy the tightness of cigarette package tracing paper.
External pressure adjustment unit 302, for tobacco bale external environment condition pressure is adjusted to the second pressure P2, makes tobacco bale internal pressure keep the first pressure P1 constant simultaneously, so that tobacco bale inside and outside portion environment produces pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1.
Preferably, when described first pressure P1 is not equal to standard atmospheric pressure, described external pressure adjustment unit 302 can be the electrically-controlled valve of airtight container; Described electrically-controlled valve may be used for opening fast and container is communicated with air, and quick closedown makes tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously, namely makes the second pressure P2 be standard atmospheric pressure; Make tobacco bale internal pressure keep the first pressure P1 constant simultaneously.The inside and outside portion of tobacco bale produces maximum differential pressure.
Pressure transducer 303, for Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance, after wherein tobacco bale inside and outside portion pressure reaches balance, tobacco bale external environment condition pressure values no longer changes.
Preferably, pressure transducer 303 can be high-speed response pressure transducer.
Preferably, if the second pressure P2 is greater than the first pressure P1, then after described external pressure adjustment unit 302 adjusts tobacco bale external environment condition pressure, tobacco bale external environment condition pressure is greater than tobacco bale internal pressure.After this, due to tobacco bale there is pressure reduction in inside and outside portion, the gas of tobacco bale outside can enter into tobacco bale inside by the crack of tobacco bale, the tobacco bale external environment condition pressure values that pressure transducer 303 gathers increases in time and reduces, and tobacco bale internal pressure can increase in time and increase, finally reach tobacco bale inside and outside portion pressure identical, setting now tobacco bale external environment condition pressure is the 3rd pressure P3, then P3 meets P2>P3>P1.
Preferably, if the second pressure P2 is less than the first pressure P1, then after described external pressure adjustment unit 302 adjusts tobacco bale external environment condition pressure, tobacco bale external environment condition pressure is less than tobacco bale internal pressure.After this, due to tobacco bale there is pressure reduction in inside and outside portion, the gas of tobacco bale outside can enter into tobacco bale inside by the crack of tobacco bale, the tobacco bale external environment condition pressure that pressure transducer 303 gathers can increase in time and increase, and tobacco bale internal pressure can increase in time and reduce, finally reach tobacco bale inside and outside portion pressure identical, setting now tobacco bale external environment condition pressure is the 3rd pressure P3, then P3 meets P1>P3>P2.
Preferably, the tobacco bale that volume is identical, the pressure values when tobacco bale inside and outside portion pressure reaches balance is identical.
Preferably, the volume requirement of airtight container is moderate, requires that the pressure change of tobacco bale inside significantly can make the pressure change of airtight container.
Preferably, airtight container volume V3 can be 1.5-3 times of tobacco bale volume V1.
Pressure curve acquiring unit 304, for the tobacco bale external environment condition pressure values according to each moment, obtains pressure change curve.
Preferably, pressure curve acquiring unit 304 specifically may be used for the pressure values of adding up each moment, until tobacco bale inside and outside portion pressure finally can reach balance, pressure remains unchanged; The pressure values in matching each moment obtains pressure change curve.
Tightness acquiring unit 305, for according to pressure change speed determination cigarette package tracing paper tightness.
Preferably, the tobacco bale of same volume, different sealing degree, the time of pressure change is different, and pressure when finally reaching pressure equilibrium is identical.Can be reflected the tightness of cigarette package tracing paper by pressure change speed, rate of change is larger, and tightness is less, otherwise tightness is larger for this reason.
Based on the cigarette package tracing paper tightness pick-up unit that the above embodiment of the present invention provides, tightness that is soft, Hard Roll cigarette package tracing paper can be detected rapidly; According to the measurement result of this index, the enclosed mechanism of being installed by appropriate adjustment kit, guarantees that the tightness of cigarette case package is good, the damp and mouldy and dry phenomenon such as frangible of the cigarette avoiding causing cigarette long-time storage to cause because of tightness difference; Pick-up unit of the present invention belongs to non-damaged data, can carry out repeatedly duplicate detection to single bag cigarette, simple to operate, be easy to realize, testing efficiency is high.
Below by concrete example, the present invention will be described:
Fig. 4 uses the schematic diagram tested tobacco bale based on pressure sensing cigarette package tracing paper tightness pick-up unit in the present invention's specific embodiment.As shown in Figure 4, describedly comprising airtight container 402 for placing tobacco bale 401 based on pressure sensing cigarette package tracing paper tightness pick-up unit, airtight container 402 being provided with bleeding point 403, electrically-controlled valve 404 and pressure transducer 303, wherein:
Described tightness pick-up unit also comprises minipump, and described minipump produces equipment as negative pressure, takes out negative pressure by bleeding point 403 pairs of airtight containers, makes all to produce same subnormal ambient inside and outside tobacco bale.
Then, when the inside and outside portion of tobacco bale is in same subnormal ambient, by opening electrically-controlled valve 404, container is communicated with air, and close electrically-controlled valve fast, what make tobacco bale outside instantaneously reaches standard atmospheric pressure, and tobacco bale internal pressure can remain unchanged.The inside and outside portion of tobacco bale produces maximum differential pressure.
Pressure transducer 303, for gathering tobacco bale external pressure, wherein the pressure of airtight container is the pressure of tobacco bale outside.Tobacco bale external pressure can increase in time and reduce.
Described tightness pick-up unit also comprises the pressure curve acquiring unit and tightness acquiring unit that are connected with described pressure transducer 303, wherein, pressure curve acquiring unit is for adding up the pressure values in each moment, tobacco bale inside and outside portion pressure finally can reach balance, pressure remains unchanged, the pressure change curve in matching each moment.Tightness acquiring unit, for according to pressure change speed determination cigarette package tracing paper tightness.
General processor for performing function described by the application, digital signal processor (DSP), special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components is can be implemented as or it is appropriately combined arbitrarily at functional units such as pressure curve acquiring unit described above, tightness acquiring units.
By implementing the present invention, following beneficial effect can be obtained:
1, the present invention can detect tightness that is soft, Hard Roll cigarette package tracing paper rapidly.
2, the present invention can according to the measurement result of cigarette package tracing paper tightness, by the enclosed mechanism that appropriate adjustment kit is installed, guarantee that the tightness of cigarette case package is good, the damp and mouldy and dry phenomenon such as frangible of the cigarette avoiding causing cigarette long-time storage to cause because of tightness difference.
3, the invention belongs to non-damaged data, repeatedly duplicate detection can be carried out to single bag cigarette, simple to operate, be easy to realize, testing efficiency is high.
4, the present invention contributes to tobacco productive corporation control cigarette product quality, and then protection customer interest.
So far, described in detail and the present invention is based on pressure sensing cigarette package tracing paper tightness detection method and device.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (8)
1., based on a pressure sensing cigarette package tracing paper tightness detection method, it is characterized in that, comprising:
The inside and outside portion environmental stress being placed in the tobacco bale of airtight container is adjusted to the first identical pressure P1;
Tobacco bale external environment condition pressure is adjusted to the second pressure P2, and make tobacco bale inside and outside portion environment produce pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1;
Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance;
According to the tobacco bale external environment condition pressure values in each moment, obtain pressure change curve;
According to pressure change speed determination cigarette package tracing paper tightness;
Wherein, when described first pressure P1 is not equal to standard atmospheric pressure, described step tobacco bale external environment condition pressure being adjusted to the second pressure P2 comprises:
The electrically-controlled valve opening airtight container makes container communicate with air, and quick closedown electrically-controlled valve, make tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously.
2. method according to claim 1, is characterized in that,
Described first pressure P1 is less than standard atmospheric pressure.
3. method according to claim 1, is characterized in that,
Airtight container volume is 1.5-3 times of tobacco bale volume.
4. method according to claim 1, is characterized in that,
The tobacco bale that volume is identical, the pressure values when tobacco bale inside and outside portion pressure reaches balance is identical.
5., based on a pressure sensing cigarette package tracing paper tightness pick-up unit, it is characterized in that, comprise initial pressure setting unit, external pressure adjustment unit, pressure transducer, pressure curve acquiring unit, tightness acquiring unit, wherein:
Initial pressure setting unit, the inside and outside portion environmental stress for the tobacco bale by being placed in airtight container is adjusted to the first identical pressure P1;
External pressure adjustment unit, for tobacco bale external environment condition pressure is adjusted to the second pressure P2, make tobacco bale inside and outside portion environment produce pressure reduction, wherein the second pressure P2 is not identical with the first pressure P1;
Pressure transducer, for Real-time Collection tobacco bale external environment condition pressure values, until tobacco bale inside and outside portion pressure reaches balance;
Pressure curve acquiring unit, for the tobacco bale external environment condition pressure values according to each moment, obtains pressure change curve;
Tightness acquiring unit, for according to pressure change speed determination cigarette package tracing paper tightness;
When described first pressure P1 is not equal to standard atmospheric pressure, described external pressure adjustment unit is the electrically-controlled valve of airtight container;
Described electrically-controlled valve, makes container communicate with air for opening fast, and quick closedown makes tobacco bale external environment condition pressure reach standard atmospheric pressure instantaneously.
6. tightness pick-up unit according to claim 5, is characterized in that,
Described initial pressure setting unit is that negative pressure produces equipment;
Described first pressure P1 is less than standard atmospheric pressure.
7. tightness pick-up unit according to claim 5, is characterized in that,
Airtight container volume is 1.5-3 times of tobacco bale volume.
8. tightness pick-up unit according to claim 5, is characterized in that,
The tobacco bale that volume is identical, the pressure values when tobacco bale inside and outside portion pressure reaches balance is identical.
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| CN110243555A (en) * | 2019-06-17 | 2019-09-17 | 福建中烟工业有限责任公司 | Cigarette packet package encapsulation degree detection system and cigarette packet package encapsulation degree detection method |
| CN112432745B (en) * | 2019-08-26 | 2022-02-08 | 中国烟草总公司郑州烟草研究院 | Nondestructive testing method for cigarette packet packaging tightness |
| CN110631776A (en) * | 2019-09-27 | 2019-12-31 | 福建中烟工业有限责任公司 | Tobacco bale sealing degree detection equipment and tobacco bale sealing degree detection method |
| CN111397817B (en) * | 2020-03-24 | 2021-08-24 | 云南中烟工业有限责任公司 | Method for measuring negative pressure air extraction method tightness by inflation method tightness measuring instrument |
| CN111323181B (en) * | 2020-04-21 | 2022-03-15 | 中国烟草总公司郑州烟草研究院 | Method for nondestructively detecting cigarette packet packaging tightness by eliminating system errors |
| CN111323183B (en) * | 2020-04-21 | 2022-04-19 | 中国烟草总公司郑州烟草研究院 | Method for zero calibration and nondestructive testing of cigarette small box package tightness by interpolation method |
| CN114264436A (en) | 2020-09-16 | 2022-04-01 | 中国烟草总公司郑州烟草研究院 | System for detecting packaging tightness of cigarette small box on line |
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| CN201876341U (en) * | 2010-12-06 | 2011-06-22 | 惠州市银农科技有限公司 | Tightness detecting device for packaging bag |
| CN103630308B (en) * | 2013-09-26 | 2016-03-09 | 汕头市新青罐机有限公司 | Packing container leak tester |
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| CN103969423A (en) | 2014-08-06 |
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