CN113008763B - Method for detecting barrier property of soft infusion bag - Google Patents
Method for detecting barrier property of soft infusion bag Download PDFInfo
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- CN113008763B CN113008763B CN202110578360.XA CN202110578360A CN113008763B CN 113008763 B CN113008763 B CN 113008763B CN 202110578360 A CN202110578360 A CN 202110578360A CN 113008763 B CN113008763 B CN 113008763B
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- 238000001802 infusion Methods 0.000 title claims abstract description 247
- 230000004888 barrier function Effects 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 302
- 230000035699 permeability Effects 0.000 claims abstract description 169
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 155
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 154
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 154
- 239000001301 oxygen Substances 0.000 claims abstract description 154
- 238000001514 detection method Methods 0.000 claims abstract description 97
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 238000001035 drying Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 3
- 239000000243 solution Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001647 drug administration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
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Abstract
The invention relates to a method for detecting the barrier property of an infusion soft bag, which comprises the following steps of S1, connecting the infusion soft bag to be detected with a drying sheet inside with a transverse power device; step S2, the central control unit controls the transverse power device to stretch the soft infusion bag to be detected, and the central control unit obtains the deformation rate of the soft infusion bag to be detected through the image acquisition device; step S3, the central control unit obtains the oxygen permeability of the transfusion soft bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device; step S4, the central control unit obtains the nitrogen permeability of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device; step S5, the central control unit obtains the amount of generated bubbles according to the bubble detection device, and further obtains the sealing degree of the soft infusion bag to be detected; and step S6, acquiring the moisture permeability of the soft infusion bag to be detected according to the weight difference of the dry pieces. The invention obtains the barrier property of the transfusion soft bag to be detected by setting the oxygen permeability, the nitrogen permeability and the moisture permeability.
Description
Technical Field
The invention relates to the field of infusion soft bag detection, in particular to a method for detecting the barrier property of an infusion soft bag.
Background
Compared with the traditional glass package, the soft plastic infusion bag has the obvious advantages in the aspects of environmental protection, cost, sanitary safety, convenient use and the like, and due to the change of the material, the performance detection which is targeted and different from the traditional infusion bag needs to be carried out to ensure the safety of the injection in the soft plastic infusion bag. Oxygen is a main factor causing the deterioration of the injection, so in order to reduce the oxygen content in the infusion bag and delay and prevent the oxidative deterioration of the medicine in the injection, a method of adding an antioxidant, a metal chelating agent or introducing an inert gas is often adopted, and the most common "inert gas" is nitrogen. The water vapor can be a cause of the change of the drug concentration when permeating into the bag, thereby bringing hidden danger to the drug administration safety.
The barrier property of the transfusion soft bag for the injection of the medical nutrient solution is an important mode for evaluating the quality of the transfusion soft bag, the transfusion soft bag with good barrier property can ensure the quality of the medical nutrient solution when used for injecting the medical nutrient solution, and the problem that the effect of the nutrient solution cannot be expected due to the problems of oxygen permeation, nitrogen permeation and moisture permeation of the transfusion soft bag is avoided.
At present, manual offline sampling inspection is mainly adopted for the detection of the soft infusion bag, the detection difficulty is high, and the labor intensity of workers is also high.
Disclosure of Invention
Therefore, the invention provides a method for detecting the barrier property of a soft infusion bag, which can solve the technical problem that the barrier property of the soft infusion bag cannot be detected efficiently.
In order to achieve the purpose, the invention provides a method for detecting the barrier property of a soft infusion bag, which comprises the following steps:
step S1, connecting the transfusion soft bag to be detected with the drying sheet inside with a transverse power device;
step S2, the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, and the central control unit obtains the deformation rate of the soft infusion bag to be detected through an image acquisition device;
step S3, the central control unit controls a longitudinal power device to press a soft infusion tube bag to be detected according to preset longitudinal power parameters; the central control unit starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey oxygen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the oxygen permeability of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S4, the central control unit continuously starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey nitrogen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the nitrogen permeation rate of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S5, the central control unit closes the vacuum pump, opens the electromagnetic valve, conveys quantitative water into the cavity, opens the vacuum pump, and obtains the amount of bubbles generated in a third preset time interval according to the bubble detection device, so as to obtain the sealing degree of the soft infusion bag to be detected;
step S6, taking out the dry piece in the soft infusion bag to be detected after the sealing degree detection, weighing the dry piece, and obtaining the moisture permeability of the soft infusion bag to be detected according to the weight difference;
the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, obtains the deformation rate S of the soft infusion bag to be detected according to the area change of the soft infusion bag to be detected before and after stretching, compares the deformation rate S of the soft infusion bag to be detected with a preset value, selects corresponding oxygen input quantity and nitrogen input quantity as gas input quantity of the high-pressure pump in unit time, and detects the oxygen permeability and the nitrogen permeability of the soft infusion bag to be detected;
the central control unit acquires the sealing degree of the transfusion soft bag to be detected through the bubble detection device, and if the sealing degree meets the preset standard, the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter; if the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter;
the central control unit obtains an oxygen permeability F and a nitrogen permeability N according to the difference between the pressure value fed back by the first pressure detection device and the pressure value fed back by the second pressure detection device; the central control unit acquires the moisture permeability H of the soft infusion bag to be detected according to the weight difference of the drying sheet before and after detection; the central control unit obtains the barrier performance P of the soft infusion bag to be detected according to the oxygen permeability F, the nitrogen permeability N and the moisture permeability H of the soft infusion bag to be detected, and sets P = F0/F × N0/N × H0/H, wherein F0 is an oxygen permeability standard parameter, N0 is a nitrogen permeability standard parameter, and H0 is a moisture permeability standard parameter.
Further, the central control unit presets a barrier performance standard value P0, and acquires the barrier performance P of the soft infusion bag to be detected, wherein,
when P is larger than or equal to P0, the central control unit judges that the barrier property of the soft infusion bag to be detected meets the preset standard;
and when P is less than P0, the central control unit judges that the barrier performance of the soft infusion bag to be detected does not meet the preset standard.
Further, the central control unit presets a transverse power parameter R, sets a first preset transverse power parameter R1, and sets a second preset transverse power parameter R2, where R1 is smaller than R2, the central control unit obtains an initial area S0 of the soft infusion bag to be detected, the central control unit selects the first preset transverse power parameter R1 to perform first stretching on the soft infusion bag to be detected, the central control unit obtains an area S1 of the soft infusion bag to be detected during the first stretching through an image acquisition device, the central control unit selects the second preset transverse power parameter R2 to perform second stretching on the soft infusion bag to be detected, the central control unit obtains an area S2 of the soft infusion bag to be detected during the second stretching through the image acquisition device, the central control unit obtains an infusion shape variability S to be detected, and sets S = (S2-S1)/(S1-S0).
Further, the central control unit obtains the oxygen input amount and the nitrogen input amount according to the obtained deformation rate S of the soft infusion bag to be detected and the preset deformation rate, wherein,
when S is less than or equal to Y1, the central control unit selects a first preset oxygen input quantity Q1 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a first preset nitrogen input quantity K1 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y1 is larger than or equal to Y2, the central control unit selects a second preset oxygen input quantity Q2 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a second preset nitrogen input quantity K2 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y2 is larger than or equal to S3, the central control unit selects a third preset oxygen input quantity Q3 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a third preset nitrogen input quantity K3 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when S is larger than Y3, the central control unit selects a fourth preset oxygen input quantity Q4 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a fourth preset nitrogen input quantity K4 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
the central control unit presets a deformation rate Y, sets a first preset deformation rate Y1, a second preset deformation rate Y2, a third preset deformation rate Y3, Y3 is larger than Y2 and is larger than Y1, presets an oxygen input quantity Q, sets a first preset oxygen input quantity Q1, a second preset oxygen input quantity Q2, a third preset oxygen input quantity Q3 and a fourth preset oxygen input quantity Q4, presets a nitrogen input quantity K, and sets a first preset nitrogen input quantity K1, a second preset nitrogen input quantity K2, a third preset nitrogen input quantity K3 and a fourth preset nitrogen input quantity K4.
Further, the central control unit presets a deformation rate standard value Y0, when the central control unit obtains that the deformation rate of the soft infusion bag to be detected is greater than a third preset deformation rate, the central control unit increases a longitudinal power parameter L of the longitudinal power device, wherein,
when S is larger than or equal to Y0, the central control unit sets the longitudinal power parameters L to L1 of the longitudinal power device to be L1= Lx (1 + (S-Y0)/Y0);
when S < Y0, the central control unit sets L2= L × (1 + (Y0-S)/Y0) for longitudinal power parameters L to L2 of the longitudinal power device.
Further, the central control unit starts a vacuum pump, the vacuum pump passes through a first preset time interval T1, the central control unit selects an i-th preset oxygen input quantity Qi to convey oxygen to the soft infusion bag to be detected, the central control unit passes through a second preset time interval T2, the central control unit obtains a first pressure detection device pressure value FQ1 and a second pressure detection device pressure value FQ2, the central control unit obtains an oxygen permeation rate F, and sets F = Qi/((FQ1-FQ2) x S2) x fj x D, wherein fj is an oxygen permeation rate compensation parameter of the soft infusion bag to be detected, and D is the thickness of the soft infusion bag to be detected.
Further, the central control unit starts a vacuum pump, the central control unit selects the ith preset nitrogen input amount Ki to convey nitrogen to the soft infusion bag to be detected after a first preset time interval T1, the central control unit obtains a first pressure detection device pressure value FK1 and a second pressure detection device pressure value FK2 after a second preset time interval T2, the central control unit obtains a nitrogen permeability N, and N = Ki/((FK1-FK 2). times.S 2). times.kj is set, wherein kj is a nitrogen permeability compensation parameter.
Further, the central control unit presets a standard number of bubbles a0, and in step S5, the central control unit obtains a number a of bubbles generated within a third preset time interval T3 by the bubble detecting device, wherein the third preset time interval is a preset number of bubbles
When a is not more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected meets the preset standard, and the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter;
when a is more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, and the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter.
Further, the central control unit judges that the sealing degree of the soft infusion bag to be detected does not meet the preset standard, the number of bubbles acquired by the central control unit is compared with the preset value, and oxygen permeability compensation parameters and nitrogen permeability compensation parameters are adjusted according to the deformation rate S of the soft infusion bag to be detected, wherein,
when a is not more than A1, the central control unit adjusts the oxygen permeability compensation parameter fj to fj1, sets fj1= fj x (1 + (A1-a)/A1 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter kj to kj1, and sets kj1= kj x (1 + (A1-a)/A1 x I S-S0I/(S0 + S));
when A1 < a is not more than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj2, and sets fj2= fj x (1 + (A2-a)/(a-A1) x (S-S0)2/S0), adjusting nitrogen permeability compensation parameter kj to kj2, setting kj2= kj x (1 + (A2-a)/(a-A1) x (S-S0)2/(S0+S)）;
When a is larger than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj3, sets fj3= fj x (1 + (a-A2)/A2 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter Kj to Kj3, and sets Kj3= Kj x (1 + (a-A2)/A2 x I S-S0I/(S0 + S));
the central control unit is preset with a bubble number A, and is set with a first preset bubble number A1 and a second preset bubble number A2.
Further, the central control unit obtains the initial mass m0 of the drying sheet and the weight m1 of the drying sheet in the infusion soft bag to be detected after the sealing degree is detected, obtains the moisture permeability H of the infusion soft bag to be detected according to the weight difference value of the drying sheet, and sets H = (m1-m0)/(T3 × S2).
Compared with the prior art, the method has the advantages that the barrier performance of the soft infusion bag to be detected is obtained according to the oxygen permeability, the nitrogen permeability and the moisture permeability of the soft infusion bag to be detected, the oxygen permeability and the nitrogen permeability are obtained by the central control unit according to the pressure value difference fed back by the first pressure detection device and the second pressure detection device, and meanwhile, the moisture permeability of the soft infusion bag to be detected is obtained through the weight difference of the drying sheets. Furthermore, the central control unit acquires the deformation rate of the soft infusion bag to be detected by controlling the transverse power parameters of the transverse power device, selects the optimal oxygen input amount and nitrogen input amount in unit time according to the comparison between the acquired deformation rate and a preset value, acquires the number of bubbles of the soft infusion bag to be detected according to the set sealing performance detection method, compares the number of bubbles of the soft infusion bag to be detected with the preset value, and adjusts the compensation parameters for acquiring the oxygen permeability and the nitrogen permeability so as to acquire the accurate oxygen permeability and nitrogen permeability.
Particularly, a barrier performance standard value is set, the barrier performance of the soft infusion bag to be detected is compared with the standard value, and if the barrier performance of the soft infusion bag to be detected is smaller than a preset standard value, the central control unit judges that the soft infusion bag to be detected does not meet the preset standard and the detection is unqualified; if the obtained barrier performance of the soft infusion bag to be detected is larger than or equal to a preset standard value, the central control unit judges that the soft infusion bag to be detected meets the preset standard value, and the detection is qualified.
Particularly, the invention sets transverse power parameters of a transverse power device, and obtains the deformation rate of the soft infusion bag to be detected according to the area change of the soft infusion bag to be detected under the stretching of different transverse power parameters; meanwhile, according to the preset deformation rate, comparing the deformation rate of the soft infusion bag to be detected obtained by the central control unit with the preset deformation rate, selecting the preset oxygen input quantity and the preset nitrogen input quantity as the gas quantity conveyed by the high-pressure pump in unit time, if the deformation rate of the soft infusion bag to be detected is lower than the preset deformation rate, indicating that the deformation of the soft infusion bag to be detected is less influenced by tension, selecting larger oxygen and nitrogen input quantities as the oxygen and nitrogen input quantities in unit time, and if the deformation rate of the soft infusion bag to be detected is higher than the preset deformation rate, indicating that the deformation of the soft infusion bag to be detected is more influenced by tension, indicating that the strength of the soft infusion bag to be detected is lower, and selecting smaller oxygen and nitrogen input quantities as the oxygen and nitrogen input quantities in unit time; according to the range of the deformation rate of the soft infusion bag to be detected, the optimal oxygen input amount and nitrogen input amount are selected, and the detection result of the oxygen permeability and nitrogen permeability of the soft infusion bag to be detected is prevented from being influenced by the strength of the soft infusion bag to be detected.
Particularly, the invention sets a deformation rate standard value, when the central control unit obtains that the deformation rate of the soft infusion bag to be detected is greater than a third preset deformation rate, the central control unit compares the deformation rate of the soft infusion bag to be detected with the deformation rate standard value, and increases the longitudinal power parameter of the longitudinal power device, so that the longitudinal power parameter of the longitudinal power device is matched with the real-time thickness of the soft infusion bag to be detected, and the situation that the longitudinal power device cannot compress the soft infusion bag to be detected due to the fact that the thickness of the soft infusion bag to be detected is changed due to stretching is avoided, and the detection result is influenced.
Particularly, the oxygen permeability compensation parameter of the soft infusion bag to be detected is set, the oxygen permeability of the soft infusion bag to be detected is set according to the product of the ratio of the oxygen input quantity in unit time selected by the central control unit to the difference value of the pressure value generated by the input oxygen acquired by the first pressure detection device and the pressure value generated by the output oxygen acquired by the second pressure detection device and the thickness, and the oxygen permeability compensation parameter is multiplied by the oxygen permeability compensation parameter of the soft infusion bag to be detected to acquire more accurate oxygen permeability of the soft infusion bag to be detected.
Particularly, the nitrogen permeability compensation parameter of the soft infusion bag to be detected is set, the nitrogen permeability of the soft infusion bag to be detected is set according to the product of the ratio of the input amount of nitrogen in unit time selected by the central control unit to the difference value of the pressure value generated by the input nitrogen acquired by the first pressure detection device and the pressure value generated by the output nitrogen acquired by the second pressure detection device and the thickness, and the nitrogen permeability compensation parameter is multiplied by the nitrogen permeability compensation parameter of the soft infusion bag to be detected to acquire more accurate nitrogen permeability of the soft infusion bag to be detected.
Particularly, the invention sets the standard number of the bubbles, compares the number of the bubbles generated in the preset time with the number of the standard bubbles, and judges whether the sealing degree of the soft infusion bag to be detected meets the standard, if the number of the bubbles is larger than the preset standard value, the sealing performance of the soft infusion bag to be detected is not strong, and the sealing performance does not meet the preset standard, so that the detection results of the oxygen permeability and the nitrogen permeability can be caused due to the problem of the weak sealing performance, therefore, the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter need to be adjusted according to the sealing performance so as to obtain more accurate barrier performance of the soft infusion bag to be detected.
Particularly, the invention provides a moisture permeability acquisition mode of the soft infusion bag to be detected, and the moisture permeability is acquired according to the weight difference of the unit time, the unit area initial mass and the final weight after the detection of the dry sheet arranged in the soft infusion bag to be detected.
Drawings
FIG. 1 is a schematic diagram of a method for detecting barrier property of a soft infusion bag according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a device for detecting barrier property of a soft infusion bag according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a method for detecting the blocking performance of an infusion soft bag comprises,
step S1, connecting the transfusion soft bag to be detected with the drying sheet inside with a transverse power device;
step S2, the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, and the central control unit obtains the deformation rate of the soft infusion bag to be detected through an image acquisition device;
step S3, the central control unit controls a longitudinal power device to press a soft infusion tube bag to be detected according to preset longitudinal power parameters; the central control unit starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey oxygen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the oxygen permeability of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S4, the central control unit continuously starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey nitrogen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the nitrogen permeation rate of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S5, the central control unit closes the vacuum pump, opens the electromagnetic valve, conveys quantitative water into the cavity, opens the vacuum pump, and obtains the amount of bubbles generated in a third preset time interval according to the bubble detection device, so as to obtain the sealing degree of the soft infusion bag to be detected;
step S6, taking out the dry piece in the soft infusion bag to be detected after the sealing degree detection, weighing the dry piece, and obtaining the moisture permeability of the soft infusion bag to be detected according to the weight difference;
the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, obtains the deformation rate S of the soft infusion bag to be detected according to the area change of the soft infusion bag to be detected before and after stretching, compares the deformation rate S of the soft infusion bag to be detected with a preset value, selects corresponding oxygen input quantity and nitrogen input quantity as gas input quantity of the high-pressure pump in unit time, and detects the oxygen permeability and the nitrogen permeability of the soft infusion bag to be detected;
the central control unit acquires the sealing degree of the transfusion soft bag to be detected through the bubble detection device, and if the sealing degree meets the preset standard, the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter; if the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter;
the central control unit obtains an oxygen permeability F and a nitrogen permeability N according to the difference between the pressure value fed back by the first pressure detection device and the pressure value fed back by the second pressure detection device; the central control unit acquires the moisture permeability H of the soft infusion bag to be detected according to the weight difference of the drying sheet before and after detection; the central control unit obtains the barrier performance P of the soft infusion bag to be detected according to the oxygen permeability F, the nitrogen permeability N and the moisture permeability H of the soft infusion bag to be detected, and sets P = F0/F × N0/N × H0/H, wherein F0 is an oxygen permeability standard parameter, N0 is a nitrogen permeability standard parameter, and H0 is a moisture permeability standard parameter.
Specifically, the barrier performance of the soft infusion bag to be detected is obtained according to the oxygen permeability, the nitrogen permeability and the moisture permeability of the soft infusion bag to be detected, the oxygen permeability and the nitrogen permeability are obtained by the central control unit according to the pressure value difference fed back by the first pressure detection device and the second pressure detection device, and meanwhile, the moisture permeability of the soft infusion bag to be detected is obtained through the weight difference of the drying pieces. Furthermore, the central control unit acquires the deformation rate of the soft infusion bag to be detected by controlling the transverse power parameters of the transverse power device, selects the optimal oxygen input amount and nitrogen input amount in unit time according to the comparison between the acquired deformation rate and a preset value, acquires the number of bubbles of the soft infusion bag to be detected according to the set sealing performance detection method, compares the number of bubbles of the soft infusion bag to be detected with the preset value, and adjusts the compensation parameters for acquiring the oxygen permeability and the nitrogen permeability so as to acquire the accurate oxygen permeability and nitrogen permeability.
The central control unit presets a barrier performance standard value P0, the central control unit obtains the barrier performance P of the soft infusion bag to be detected, wherein,
when P is larger than or equal to P0, the central control unit judges that the barrier property of the soft infusion bag to be detected meets the preset standard;
and when P is less than P0, the central control unit judges that the barrier performance of the soft infusion bag to be detected does not meet the preset standard.
Particularly, a barrier performance standard value is set, the barrier performance of the soft infusion bag to be detected is compared with the standard value, and if the barrier performance of the soft infusion bag to be detected is smaller than a preset standard value, the central control unit judges that the soft infusion bag to be detected does not meet the preset standard and the detection is unqualified; if the obtained barrier performance of the soft infusion bag to be detected is larger than or equal to a preset standard value, the central control unit judges that the soft infusion bag to be detected meets the preset standard value, and the detection is qualified.
The method comprises the steps that a central control unit presets a transverse power parameter R, sets a first preset transverse power parameter R1 and a second preset transverse power parameter R2, wherein R1 is smaller than R2, the central control unit obtains an initial area S0 of a soft infusion bag to be detected, the central control unit selects a first preset transverse power parameter R1 to stretch the soft infusion bag to be detected for the first time, the central control unit obtains the area S1 of the soft infusion bag to be detected during the first stretching through an image acquisition device, the central control unit selects a second preset transverse power parameter R2 to stretch the soft infusion bag for the second time, the central control unit obtains the area S2 of the soft infusion bag to be detected during the second stretching through the image acquisition device, and the central control unit obtains a deformation rate S of the soft infusion bag to be detected and sets S = (S2-S1)/(S1-S0).
The central control unit obtains the oxygen input quantity and the nitrogen input quantity according to the obtained deformation rate S of the soft infusion bag to be detected and the preset deformation rate, wherein,
when S is less than or equal to Y1, the central control unit selects a first preset oxygen input quantity Q1 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a first preset nitrogen input quantity K1 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y1 is larger than or equal to Y2, the central control unit selects a second preset oxygen input quantity Q2 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a second preset nitrogen input quantity K2 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y2 is larger than or equal to S3, the central control unit selects a third preset oxygen input quantity Q3 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a third preset nitrogen input quantity K3 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when S is larger than Y3, the central control unit selects a fourth preset oxygen input quantity Q4 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a fourth preset nitrogen input quantity K4 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
the central control unit presets a deformation rate Y, sets a first preset deformation rate Y1, a second preset deformation rate Y2, a third preset deformation rate Y3, Y3 is larger than Y2 and is larger than Y1, presets an oxygen input quantity Q, sets a first preset oxygen input quantity Q1, a second preset oxygen input quantity Q2, a third preset oxygen input quantity Q3 and a fourth preset oxygen input quantity Q4, presets a nitrogen input quantity K, and sets a first preset nitrogen input quantity K1, a second preset nitrogen input quantity K2, a third preset nitrogen input quantity K3 and a fourth preset nitrogen input quantity K4. Specifically, the invention sets transverse power parameters of a transverse power device, and obtains the deformation rate of the soft infusion bag to be detected according to the area change of the soft infusion bag to be detected under the stretching of different transverse power parameters; meanwhile, according to the preset deformation rate, comparing the deformation rate of the soft infusion bag to be detected obtained by the central control unit with the preset deformation rate, selecting the preset oxygen input quantity and the preset nitrogen input quantity as the gas quantity conveyed by the high-pressure pump in unit time, if the deformation rate of the soft infusion bag to be detected is lower than the preset deformation rate, indicating that the deformation of the soft infusion bag to be detected is less influenced by tension, selecting larger oxygen and nitrogen input quantities as the oxygen and nitrogen input quantities in unit time, and if the deformation rate of the soft infusion bag to be detected is higher than the preset deformation rate, indicating that the deformation of the soft infusion bag to be detected is more influenced by tension, indicating that the strength of the soft infusion bag to be detected is lower, and selecting smaller oxygen and nitrogen input quantities as the oxygen and nitrogen input quantities in unit time; according to the range of the deformation rate of the soft infusion bag to be detected, the optimal oxygen input amount and nitrogen input amount are selected, and the detection result of the oxygen permeability and nitrogen permeability of the soft infusion bag to be detected is prevented from being influenced by the strength of the soft infusion bag to be detected.
Specifically, the deformation rate of the soft infusion bag to be detected is acquired through the image processing device, and the material, the setting position and the setting mode of the image processing device are not limited in the embodiment of the invention as long as the area of the soft infusion bag to be detected can be acquired.
The central control unit presets a deformation rate standard value Y0, when the deformation rate of the transfusion soft bag to be detected is larger than a third preset deformation rate, the central control unit increases a longitudinal power parameter L of the longitudinal power device, wherein,
when S is larger than or equal to Y0, the central control unit sets the longitudinal power parameters L to L1 of the longitudinal power device to be L1= Lx (1 + (S-Y0)/Y0);
when S < Y0, the central control unit sets L2= L × (1 + (Y0-S)/Y0) for longitudinal power parameters L to L2 of the longitudinal power device.
Specifically, the deformation rate standard value is set, when the central control unit obtains that the deformation rate of the soft infusion bag to be detected is greater than the third preset deformation rate, the central control unit compares the deformation rate of the soft infusion bag to be detected with the deformation rate standard value, and increases the pressure value of the longitudinal power device, so that the pressure value of the longitudinal power device is matched with the real-time thickness of the soft infusion bag to be detected, and the situation that the longitudinal power device cannot tightly press the soft infusion bag to be detected due to the fact that the thickness of the soft infusion bag to be detected changes due to stretching is avoided, and the detection result is influenced.
The central control unit starts a vacuum pump, the vacuum pump is started through a first preset time interval T1, the central control unit selects an ith preset oxygen input quantity Qi to convey oxygen to the soft infusion bag to be detected, the central control unit obtains a first pressure detection device pressure value FQ1 and a second pressure detection device pressure value FQ2 through a second preset time interval T2, the central control unit obtains an oxygen permeability F, and F = Qi/((FQ1-FQ2) xS 2) xfj xD is set, wherein fj is an oxygen permeability compensation parameter of the soft infusion bag to be detected, and D is the thickness of the soft infusion bag to be detected.
Specifically, the oxygen permeability compensation parameter of the soft infusion bag to be detected is set, the oxygen permeability of the soft infusion bag to be detected is set according to the product of the ratio of the oxygen input quantity in unit time selected by the central control unit to the difference value of the pressure value generated by the input oxygen acquired by the first pressure detection device and the pressure value generated by the output oxygen acquired by the second pressure detection device and the thickness, and the oxygen permeability compensation parameter is multiplied by the oxygen permeability compensation parameter of the soft infusion bag to be detected to acquire more accurate oxygen permeability of the soft infusion bag to be detected.
The method comprises the following steps that a vacuum pump is started by a central control unit, nitrogen is conveyed to a soft infusion bag to be detected by the central control unit through a first preset time interval T1 by selecting an ith preset nitrogen input amount Ki, the central control unit obtains a first pressure detection device pressure value FK1 and a second pressure detection device pressure value FK2 through a second preset time interval T2, the central control unit obtains a nitrogen permeability N, and N = Ki/((FK1-FK2) xS 2) xkj is set, wherein kj is a nitrogen permeability compensation parameter.
Specifically, the nitrogen permeability compensation parameter of the soft infusion bag to be detected is set, the nitrogen permeability of the soft infusion bag to be detected is set according to the product of the ratio of the input nitrogen per unit time selected by the central control unit to the difference value of the pressure value generated by the input nitrogen acquired by the first pressure detection device and the pressure value generated by the output nitrogen acquired by the second pressure detection device and the thickness, and the nitrogen permeability compensation parameter is multiplied by the nitrogen permeability compensation parameter of the soft infusion bag to be detected to acquire the more accurate nitrogen permeability of the soft infusion bag to be detected.
The central control unit presets a standard number of bubbles a0, and in step S5, the central control unit obtains a number of bubbles a generated within a third preset time interval T3 by the bubble detecting device, wherein the number of bubbles a is obtained
When a is not more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected meets the preset standard, and the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter;
when a is more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, and the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter.
Specifically, the bubble detecting device according to the embodiment of the present invention may be an ultrasonic detector, and the number of generated bubbles is recorded by the change of the wave frequency when the bubbles are generated.
The central control unit judges that the sealing degree of the soft infusion bag to be detected does not meet the preset standard, the number of bubbles acquired by the central control unit is compared with the preset value, and oxygen permeability compensation parameters and nitrogen permeability compensation parameters are adjusted according to the deformation rate S of the soft infusion bag to be detected, wherein,
when a is not more than A1, the central control unit adjusts the oxygen permeability compensation parameter fj to fj1, sets fj1= fj x (1 + (A1-a)/A1 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter kj to kj1, and sets kj1= kj x (1 + (A1-a)/A1 x I S-S0I/(S0 + S));
when A1 < a is not more than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj2, and sets fj2= fj x (1 + (A2-a)/(a-A1) x (S-S0)2/S0), adjusting nitrogen permeability compensation parameter kj to kj2, setting kj2= kj x (1 + (A2-a)/(a-A1) x (S-S0)2/(S0+S)）;
When a is larger than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj3, sets fj3= fj x (1 + (a-A2)/A2 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter Kj to Kj3, and sets Kj3= Kj x (1 + (a-A2)/A2 x I S-S0I/(S0 + S));
the central control unit is preset with a bubble number A, and is set with a first preset bubble number A1 and a second preset bubble number A2.
Specifically, the standard number of the bubbles is set, whether the sealing degree of the soft infusion bag to be detected meets the standard or not is judged according to the comparison between the number of the bubbles generated in the preset time and the standard number of the bubbles, if the number of the bubbles is larger than the preset standard value, the sealing performance of the soft infusion bag to be detected is not strong, and the sealing performance does not meet the preset standard, so that the detection results of the oxygen permeability and the nitrogen permeability are caused due to the problem of the weak sealing performance, and therefore the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter need to be adjusted according to the sealing performance so as to obtain more accurate blocking performance of the soft infusion bag to be detected.
The central control unit obtains the initial mass m0 of the dry sheet and the weight m1 of the dry sheet in the infusion soft bag to be detected after the sealing degree is detected, obtains the moisture permeability H of the infusion soft bag to be detected according to the weight difference value of the dry sheet, and sets H = (m1-m0)/(T3 × S2).
Specifically, the invention provides a moisture permeability acquisition mode of the soft infusion bag to be detected, and the moisture permeability is acquired according to the weight difference of the unit time, the unit area initial mass and the final weight after the detection of the dry sheet arranged in the soft infusion bag to be detected.
The detection chamber 1 is used for detecting the barrier performance of the transfusion soft bag; a first pressing plate 3 is arranged above the cavity 2 and used for pressing a soft infusion bag to be detected, the first pressing plate comprises a first conveying pipe 6 with a downward opening, a first pressure detection device 8 is arranged on the first conveying pipe and used for acquiring pressure intensity during gas input, a high-pressure pump 7 is further arranged on the first conveying pipe and used for providing power for gas conveying, a bubble detection device 10 is arranged on the first pressing plate and used for acquiring the number of bubbles generated during detection of the sealing degree of the soft infusion bag to be detected, an image acquisition device 19 is further arranged on the first pressing plate and used for acquiring the area of the soft infusion bag to be detected during detection of the shape variability of the soft infusion bag to be detected, the first pressing plate further comprises a third conveying pipe, a pipe orifice of the third conveying pipe is arranged below the first pressing plate and used for conveying water, and an electromagnetic valve 20 is arranged on the third conveying pipe and used for controlling the water conveying amount, a first connecting shaft 4 is connected above the first pressing plate, and the first pressing plate is connected with a first longitudinal power device 5 through the first connecting shaft and used for providing longitudinal power for the first pressing plate; a second pressing plate 9 is arranged below the cavity 10 and used for pressing a soft infusion bag to be detected, the second pressing plate comprises a second conveying pipe 12 with an upward opening and used for conveying gas, a vacuum pump 14 is arranged on the second conveying pipe and used for vacuumizing the environment below the soft infusion bag to be detected, a second pressure detection device 13 is arranged on the second conveying pipe and used for acquiring an output pressure value, a second connecting shaft 11 is connected above the second pressing plate, and the second pressing plate is connected with a second longitudinal power device 15 through the second connecting shaft and used for providing longitudinal power for the second pressing plate; the middle position of one side of the detection chamber is provided with a first transverse power device 17 and a second transverse power device 16 which is correspondingly arranged, and the first transverse power device and the second transverse power device are used for providing transverse power for the soft infusion bag to be detected. Furthermore, the first transverse power device and the second transverse power device are connected with the soft infusion bag to be detected through connecting wires.
In particular to a device for detecting the soft infusion bag, when the soft infusion bag to be detected is connected with a first transverse power device and a second transverse power device, the first transverse power device and the second transverse power device respectively stretch the soft infusion bag to be detected in opposite directions, the image processing device obtains the area of the soft infusion bag to be detected under different tension, when the oxygen permeability of the transfusion soft bag to be detected is detected, the first longitudinal power device drives the first pressing plate to move downwards through the first connecting shaft, the second longitudinal power device drives the second pressing plate to move upwards through the second connecting shaft, the transfusion soft bag to be detected is pressed tightly, starting a vacuum pump to ensure that the environment below the transfusion soft bag to be detected is in a vacuum state, starting a high-pressure pump, conveying oxygen to a to-be-detected transfusion soft bag through a first conveying pipe, and acquiring oxygen permeability by a central control unit through a difference value of a first pressure detection device and a second pressure detection device; and continuously starting the vacuum pump, conveying nitrogen to the soft infusion bag to be detected through the first conveying pipe, and acquiring the nitrogen permeation rate by the central control unit through the difference value of the first pressure detection device and the second pressure detection device.
Specifically, when the sealing performance of the infusion soft bag to be detected is performed, the vacuum pump is stopped, the electromagnetic valve is opened, a fixed amount of water is conveyed into the cavity through the third conveying pipe, further, the water level is higher than the position of the infusion soft bag to be detected, the vacuum pump is started, and the central control unit obtains the number of bubbles generated within a preset time through the bubble detection device.
Specifically, in order to ensure implementation of sealing performance detection, when the sealing performance detection is performed, the central control unit adjusts the longitudinal power parameter of the first longitudinal power device to drive the first connecting shaft to move upwards, and the first connecting shaft drives the first pressing plate to move upwards, so that a space is provided for the sealing performance detection.
Specifically, the drying sheet is placed in the soft infusion bag to be detected, in order to avoid experimental errors, the drying sheet is made of a sheet material as much as possible, the size of the drying sheet is similar to that of the soft infusion bag to be detected, after the detection of the sealing performance is finished, the drying sheet is taken out and weighed, and the moisture permeability of the soft infusion bag to be detected is obtained according to the weight change of the drying sheet in the detection.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (8)
1. A method for detecting the barrier performance of a soft infusion bag is characterized by comprising the following steps:
step S1, connecting the transfusion soft bag to be detected with the drying sheet inside with a transverse power device;
step S2, the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, and the central control unit obtains the deformation rate of the soft infusion bag to be detected through an image acquisition device;
step S3, the central control unit controls a longitudinal power device to press a soft infusion tube bag to be detected according to preset longitudinal power parameters; the central control unit starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey oxygen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the oxygen permeability of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S4, the central control unit continuously starts a vacuum pump, after a first preset time interval, the central control unit starts a high-pressure pump to convey nitrogen to the soft infusion bag to be detected, and after a second preset time interval, the central control unit obtains the nitrogen permeation rate of the soft infusion bag to be detected according to the difference value of the pressure values of the first pressure detection device and the second pressure detection device;
step S5, the central control unit closes the vacuum pump, opens the electromagnetic valve, conveys quantitative water into the cavity, opens the vacuum pump, and obtains the amount of bubbles generated in a third preset time interval according to the bubble detection device, so as to obtain the sealing degree of the soft infusion bag to be detected;
step S6, taking out the dry piece in the soft infusion bag to be detected after the sealing degree detection, weighing the dry piece, and obtaining the moisture permeability of the soft infusion bag to be detected according to the weight difference;
in step S3, the longitudinal power device controls the first pressing plate and the second pressing plate to press the soft infusion bag to be tested, wherein the second pressing plate is disposed below the first pressing plate, the first pressing plate includes a first delivery pipe with a downward opening, the first delivery pipe is provided with the first pressure detector for obtaining pressure during gas input, the first delivery pipe is further provided with a high-pressure pump for providing power for gas delivery, the first pressing plate is provided with a bubble detector for obtaining the number of bubbles generated during the detection of the sealing degree of the soft infusion bag to be tested, the first pressing plate is further provided with a third delivery pipe for delivering water, the third delivery pipe is provided with an electromagnetic valve for controlling the amount of delivered water, the second pressing plate includes a second delivery pipe with an upward opening for delivering gas, the second conveying pipe is provided with a vacuum pump for vacuumizing the environment below the soft infusion bag to be detected, and the second conveying pipe is provided with a second pressure detection device for acquiring an output pressure value;
the central control unit controls the transverse power device to stretch the soft infusion bag to be detected according to preset transverse power parameters, obtains the deformation rate S of the soft infusion bag to be detected according to the area change of the soft infusion bag to be detected before and after stretching, compares the deformation rate S of the soft infusion bag to be detected with a preset value, selects corresponding oxygen input quantity and nitrogen input quantity as gas input quantity of the high-pressure pump in unit time, and detects the oxygen permeability and the nitrogen permeability of the soft infusion bag to be detected;
the central control unit acquires the sealing degree of the transfusion soft bag to be detected through the bubble detection device, and if the sealing degree meets the preset standard, the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter; if the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter; the oxygen permeability compensation parameter is used for accurately acquiring the oxygen permeability of the soft infusion bag to be detected, and the nitrogen permeability compensation parameter is used for accurately acquiring the nitrogen permeability of the soft infusion bag to be detected;
the central control unit obtains an oxygen permeability F and a nitrogen permeability N according to the difference between the pressure value fed back by the first pressure detection device and the pressure value fed back by the second pressure detection device; the central control unit acquires the moisture permeability H of the soft infusion bag to be detected according to the weight difference of the drying sheet before and after detection; the central control unit obtains the barrier performance P of the soft infusion bag to be detected according to the oxygen permeability F, the nitrogen permeability N and the moisture permeability H of the soft infusion bag to be detected, and sets P = F0/F × N0/N × H0/H, wherein F0 is an oxygen permeability standard parameter, N0 is a nitrogen permeability standard parameter, and H0 is a moisture permeability standard parameter;
the central control unit starts a vacuum pump, the vacuum pump is used for conveying oxygen to the soft infusion bag to be detected through a first preset time interval T1, the central control unit selects an ith preset oxygen input quantity Qi to convey the oxygen to the soft infusion bag to be detected, the central control unit obtains a first pressure detection device pressure value FQ1 and a second pressure detection device pressure value FQ2 through a second preset time interval T2, the central control unit obtains an oxygen permeability F, and F = Qi/((FQ1-FQ2) xS 2) xfj xD is set, wherein fj is an oxygen permeability compensation parameter of the soft infusion bag to be detected, and D is the thickness of the soft infusion bag to be detected;
the method comprises the following steps that a vacuum pump is started by a central control unit, nitrogen is conveyed to a soft infusion bag to be detected through a first preset time interval T1 by selecting an ith preset nitrogen input amount Ki through the central control unit, the first pressure detection device pressure value FK1 and a second pressure detection device pressure value FK2 are obtained by the central control unit through a second preset time interval T2, the nitrogen permeability N is obtained by the central control unit, N = Ki/((FK1-FK2) xS 2) xkj is set, kj is a nitrogen permeability compensation parameter, and S2 is that the central control unit obtains the area of the soft infusion bag to be detected during second stretching through an image acquisition device.
2. The method for detecting the barrier property of the soft infusion bag according to claim 1, wherein the central control unit presets a barrier property standard value P0, and acquires the barrier property P of the soft infusion bag to be detected,
when P is larger than or equal to P0, the central control unit judges that the barrier property of the soft infusion bag to be detected meets the preset standard;
and when P is less than P0, the central control unit judges that the barrier performance of the soft infusion bag to be detected does not meet the preset standard.
3. The method for detecting the barrier performance of the infusion soft bag according to claim 2, wherein, the central control unit presets a transverse power parameter R, sets a first preset transverse power parameter R1 and a second preset transverse power parameter R2, wherein R1 is smaller than R2, the central control unit obtains the initial area S0 of the infusion soft bag to be detected, the central control unit selects a first preset transverse dynamic parameter R1 to carry out primary stretching on the soft infusion bag to be detected, the central control unit acquires the area S1 of the soft infusion bag to be detected during the primary stretching through the image acquisition device, the central control unit selects a second preset transverse dynamic parameter R2 to carry out secondary stretching on the soft infusion bag to be detected, the central control unit acquires the area S2 of the soft infusion bag to be detected during the secondary stretching through the image acquisition device, the central control unit obtains the deformation rate S of the infusion soft bag to be detected and sets S = (S2-S1)/(S1-S0).
4. The method for detecting the barrier property of the soft infusion bag according to claim 3, wherein the central control unit obtains the input amount of oxygen and the input amount of nitrogen according to the obtained deformation rate S of the soft infusion bag to be detected and the preset deformation rate, wherein,
when S is less than or equal to Y1, the central control unit selects a first preset oxygen input quantity Q1 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a first preset nitrogen input quantity K1 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y1 is larger than or equal to Y2, the central control unit selects a second preset oxygen input quantity Q2 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a second preset nitrogen input quantity K2 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when Y2 is larger than or equal to S3, the central control unit selects a third preset oxygen input quantity Q3 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a third preset nitrogen input quantity K3 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
when S is larger than Y3, the central control unit selects a fourth preset oxygen input quantity Q4 as the oxygen input quantity of the high-pressure pump in the step S3 in unit time, and selects a fourth preset nitrogen input quantity K4 as the nitrogen input quantity of the high-pressure pump in the step S4 in unit time;
the central control unit presets a deformation rate Y, sets a first preset deformation rate Y1, a second preset deformation rate Y2, a third preset deformation rate Y3, Y3 is larger than Y2 and is larger than Y1, presets an oxygen input quantity Q, sets a first preset oxygen input quantity Q1, a second preset oxygen input quantity Q2, a third preset oxygen input quantity Q3 and a fourth preset oxygen input quantity Q4, wherein Q1 is larger than Q2 is larger than Q3 is larger than Q4; the central control unit presets a nitrogen input amount K, and sets a first preset nitrogen input amount K1, a second preset nitrogen input amount K2, a third preset nitrogen input amount K3 and a fourth preset nitrogen input amount K4, wherein K1 is more than K2 and more than K3 and more than K4.
5. The method for detecting the blocking performance of the soft infusion bag according to claim 4, wherein the central control unit presets a deformation rate standard value Y0, and when the deformation rate of the soft infusion bag to be detected, which is acquired by the central control unit, is greater than a third preset deformation rate, the central control unit increases a longitudinal power parameter L of the longitudinal power device, wherein,
when S is larger than or equal to Y0, the central control unit increases the longitudinal power parameter L of the longitudinal power device to L1, and sets L1= L x (1 + (S-Y0)/Y0);
when S < Y0, the central control unit increases the longitudinal power parameter L of the longitudinal power means to L2, setting L2= L × (1 + (Y0-S)/Y0).
6. The method for testing the blocking performance of the infusion soft bag according to claim 5, wherein the central control unit presets a standard number of air bubbles A0, and in step S5, the central control unit obtains the number of air bubbles a generated within a third preset time interval T3 through the air bubble testing device, wherein
When a is not more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected meets the preset standard, and the central control unit does not adjust the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter;
when a is more than A0, the central control unit judges that the sealing degree of the transfusion soft bag to be detected does not meet the preset standard, and the central control unit adjusts the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter.
7. The method for detecting the barrier property of the soft infusion bag according to claim 6, wherein the central control unit determines that the sealing degree of the soft infusion bag to be detected does not meet the preset standard, the number of the bubbles acquired by the central control unit is compared with the preset value, and the oxygen permeability compensation parameter and the nitrogen permeability compensation parameter are adjusted according to the deformation rate S of the soft infusion bag to be detected, wherein,
when a is not more than A1, the central control unit adjusts the oxygen permeability compensation parameter fj to fj1, sets fj1= fj x (1 + (A1-a)/A1 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter kj to kj1, and sets kj1= kj x (1 + (A1-a)/A1 x I S-S0I/(S0 + S));
when A1 < a is not more than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj2, sets fj2= fj x (1 + (A2-a)/(a-A1) x (S-S0) 2/S0), adjusts the nitrogen permeability compensation parameter kj to kj2, and sets kj2= kj x (1 + (A2-a)/(a-A1) x (S-S0)2/(S0+ S));
when a is larger than A2, the central control unit adjusts the oxygen permeability compensation parameter fj to fj3, sets fj3= fj x (1 + (a-A2)/A2 x I S-S0I/S0), adjusts the nitrogen permeability compensation parameter kj to kj3, and sets kj3= kj x (1 + (a-A2)/A2 x I S-S0I/(S0 + S));
the central control unit is preset with a bubble number A, and is set with a first preset bubble number A1 and a second preset bubble number A2.
8. The method for detecting the barrier property of the soft infusion bag according to claim 7, wherein the central control unit obtains the initial mass m0 of the drying sheet and the weight m1 of the drying sheet in the soft infusion bag to be detected after the detection of the sealing degree, and the central control unit obtains the moisture permeability H of the soft infusion bag to be detected according to the weight difference of the drying sheet and sets H = (m1-m0)/(T3 × S2).
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