CN117804994A - Sheet material air permeability flow test system, method, equipment and storage medium - Google Patents
Sheet material air permeability flow test system, method, equipment and storage medium Download PDFInfo
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Abstract
The utility model relates to the technical field of air permeability detection, and discloses a sheet material air permeability flow test system, a method, equipment and a storage medium, wherein the system comprises an air permeability tester, the air permeability tester comprises an air source device, a pressure regulating component, a product jig for placing a sheet material to be tested, a flowmeter and a control module, an air inlet end of the pressure regulating component is communicated with an air outlet end of the air source device, an air outlet end of the pressure regulating component is communicated with an air inlet end of the product jig, the flowmeter is arranged at an air outlet end of the product jig, and the control module is electrically connected with the air source device, the pressure regulating component, the product jig and the flowmeter; the control module includes: the system comprises a model information identification module, an air pressure adjustment module and a detection result generation module; the application has the effect of improving the air permeability detection efficiency of the sheet material.
Description
Technical Field
The application relates to the technical field of air permeability detection, in particular to a system, a method, equipment and a storage medium for testing air permeability flow of a sheet material.
Background
When the air permeability of a workpiece is required to be detected, a direct pressure type detection device is commonly used for detection on the existing product production line, specifically, air is used as a medium, certain pressure is applied to the inner cavity or the outer surface of the workpiece to be detected, and the pressure change is detected through a high-precision air pressure sensor, so that the air permeability of the product is estimated; however, the above-mentioned related art is not high enough in the detection accuracy to the air leakage speed, mainly used for detecting the gas tightness of product, when the product to be detected is paper, spun silk cloth, damping cotton, steel mesh etc. that the gas permeability requirement is higher, this kind of detection method can't measure the air flow value through the product to be detected in real time, therefore has the problem that detection efficiency is lower.
Disclosure of Invention
In order to improve the air permeability detection efficiency of the sheet material, the application provides an air permeability flow test system, an air permeability flow test method, an air permeability flow test device and a storage medium of the sheet material.
The first technical scheme adopted by the invention of the application is as follows:
the air permeability flow testing system of the sheet material comprises an air permeability tester, wherein the air permeability tester comprises an air source device, a pressure regulating component, a product jig for placing the sheet material to be tested, a flowmeter and a control module, the air inlet end of the pressure regulating component is communicated with the air outlet end of the air source device, the air outlet end of the pressure regulating component is communicated with the air inlet end of the product jig, the flowmeter is arranged at the air outlet end of the product jig, and the control module is electrically connected with the air source device, the pressure regulating component, the product jig and the flowmeter; the control module includes:
the model information identification module is used for acquiring image characteristic data of the sheet material to be detected and identifying corresponding model information based on the image characteristic data;
the air pressure adjusting module is used for matching a corresponding air pressure adjusting value with a qualified flow interval from a preset parameter form based on model information and sending the air pressure adjusting value to the pressure adjusting component;
the detection result generation module is used for acquiring a flow detection value and comparing the flow detection value with the qualified flow interval, and generating detection result information based on the comparison result of the flow detection value and the qualified flow interval.
Through adopting above-mentioned technical scheme, the gas permeability tester includes air supply device, pressure regulating subassembly, product tool and flowmeter, wherein, air supply device is used for supplying the high-pressure air that is used for carrying out the gas permeability flow test, pressure regulating subassembly is used for adjusting the atmospheric pressure of air that air supply device supplied, adjust the air pressure who inputs to product tool into required specific numerical value, product tool is used for placing the slice material that awaits measuring, in order to fix the slice material that awaits measuring when the gas permeability flow test needs to carry out, the flowmeter is used for detecting the air flow value that sees through the slice material that awaits measuring, in order to realize the gas permeability flow test to the slice material that awaits measuring, control module is used for controlling each spare part of gas permeability tester, thereby improve the automation and the intelligent level of gas permeability tester.
In a preferred example, the present application: the pressure regulating assembly comprises a pressure regulating valve, a pressure regulating and stabilizing valve and a one-way throttle valve, the pressure regulating valve is communicated with the air source device and the pressure regulating and stabilizing valve, one end of the pressure regulating and stabilizing valve, which is far away from the pressure regulating valve, is communicated with the one-way throttle valve, and one end of the one-way throttle valve, which is far away from the pressure regulating and stabilizing valve, is communicated with the product jig.
By adopting the technical scheme, the pressure regulating assembly comprises a pressure regulating valve, a pressure regulating and stabilizing valve and a one-way throttle valve, wherein the pressure regulating valve is used for controlling the air pressure output by the air source device and controlling the on-off of an air path between the air source device and the pressure regulating assembly; the pressure regulating and stabilizing valve is used for controlling the air pressure value input to the product jig, and the one-way throttle valve is used for preventing air from flowing back when the pressure regulating valve blocks the air path.
In a preferred example, the present application: the pressure regulating valve is connected with a pneumatic foot switch.
Through adopting above-mentioned technical scheme, the air-vent valve is connected with pneumatic foot switch, and the testers of being convenient for pass through the break-make of step control air-vent valve to control whether air supply device communicates with the pressure regulating subassembly, and do not interfere the hand actions such as the test personnel's of placing the slice material that awaits measuring, record test result, thereby improved manual operation efficiency.
The second object of the present application is achieved by the following technical scheme:
a sheet material air permeability flow rate testing method applied to the sheet material air permeability flow rate testing system described in any one of the above, comprising:
acquiring image characteristic data of a sheet material to be detected, and identifying corresponding model information based on the image characteristic data;
based on model information, matching a corresponding air pressure regulating value with a qualified flow interval from a preset parameter form, and sending the air pressure regulating value to a pressure regulating assembly;
and acquiring a flow detection value, comparing the flow detection value with the qualified flow interval, and generating detection result information based on a comparison result of the flow detection value and the qualified flow interval.
By adopting the technical scheme, the image of the sheet material to be detected is shot, the corresponding image characteristic data is identified, and the model information corresponding to the sheet material to be detected is identified through the image characteristic; according to model information, matching a gas pressure value required by a test corresponding to the sheet material to be tested with a qualified flow interval corresponding to a qualified product from a preset parameter form, and sending a gas pressure regulating value to a pressure regulating assembly so that the pressure regulating assembly can regulate the gas pressure value provided by a gas source device to the sheet material to be tested according to the gas pressure regulating value; and detecting the air flow value passing through the sheet material to be detected to obtain a flow detection value, and comparing the flow detection value with a qualified flow interval, so that detection result information is generated according to a comparison result, and the air permeability detection efficiency of the sheet material is improved.
In a preferred example, the present application: the obtaining the image characteristic data of the sheet material to be detected, and identifying the corresponding model information based on the image characteristic data comprises the following steps:
acquiring an image of a material to be detected and inputting the image into an image recognition model to recognize corresponding image characteristic data;
and matching the image characteristic data with a preset image characteristic form to determine corresponding model information.
By adopting the technical scheme, the image of the sheet material to be detected is shot to obtain an image of the material to be detected, and the image characteristic recognition is carried out on the image of the material to be detected through the image recognition model, so that the image characteristic data corresponding to the image of the material to be detected is obtained; and matching the image characteristic data with a preset image characteristic form, so as to determine model information corresponding to the sheet material to be tested, and facilitate the subsequent determination of the numerical interval of air pressure supply numerical value requirements and corresponding test qualified flow corresponding to the sheet material to be tested.
In a preferred example, the present application: the method for matching the corresponding air pressure regulating value and the qualified flow interval from the preset parameter form based on the model information, and sending the air pressure regulating value to the pressure regulating assembly comprises the following steps:
matching the model information with a preset parameter form, and determining an alternative air pressure value corresponding to the model information and a corresponding qualified flow interval;
and determining an air pressure regulating value serving as a regulating target of the pressure regulating assembly from the alternative air pressure values, generating an air pressure regulating instruction based on the air pressure regulating value, and sending the air pressure regulating instruction to the pressure regulating assembly.
By adopting the technical scheme, the model information is matched with a preset parameter form, so that an alternative air pressure value required by air permeability flow test work and a flow value interval of a corresponding qualified product corresponding to the sheet material to be tested of the model are determined; and selecting an air pressure regulating value serving as a regulating target of the pressure regulating assembly from the alternative air pressure values, generating an air pressure regulating instruction according to the air pressure regulating value, and sending the air pressure regulating instruction to the pressure regulating assembly so as to control the pressure regulating assembly to regulate air supplied by the air source device to the air pressure regulating value and convey the air to the product jig.
In a preferred example, the present application: the step of obtaining the flow detection value and comparing the flow detection value with the qualified flow interval, and generating detection result information based on the comparison result of the flow detection value and the qualified flow interval, comprises the following steps:
when a test start signal is received, a plurality of flow detection values and corresponding time nodes are acquired according to a preset sampling frequency, and flow-time information is generated;
determining a flow detection value in a stable detection period from the flow-time information, and comparing the flow detection value with a corresponding qualified flow interval;
if the flow detection value is positioned in the corresponding qualified flow interval, generating qualified detection result information, and if the flow detection value exceeds the corresponding qualified flow interval, generating unqualified detection result information;
the test start signal is a signal generated when the air permeability flow rate test starts.
By adopting the technical scheme, when a test start signal is received, a plurality of flow detection values and time nodes corresponding to the flow detection values are acquired according to a preset sampling frequency, so that flow-time information is generated, and the subsequent analysis of the change condition of the flow detection values along with time after the air permeability flow test is started is facilitated; after the air permeability flow test is started, the air pressure of the air inlet side of the sheet material to be tested may change along with time, a flow detection value in a stable detection period is obtained from flow-time information, and the flow detection value in the stable detection period is compared with a corresponding qualified flow interval, so that the accuracy of a comparison result is improved; if the flow detection value is positioned in the corresponding qualified flow interval, generating qualified detection result information, and if the flow detection value exceeds the corresponding qualified flow interval, generating unqualified detection result information, and conveniently improving the judging efficiency of the detection result without manually judging the flow detection value.
In a preferred example, the present application: the air outlet side of the product jig is also provided with a plurality of air outlet pressure sensors in a surrounding way; the sheet material air permeability flow test method further comprises the following steps:
collecting the air outlet pressure values measured by each air outlet pressure sensor in the unsteady detection period and corresponding time nodes according to a preset sampling frequency, and generating a plurality of pressure-time information;
acquiring corresponding pressure value series A from a plurality of pressure-time information according to time sequence i1 、A i2 、……A in Calculating a pressure deviation parameter
When the pressure deviation parameter N is greater than a preset deviation parameter threshold N 0 In this case, abnormal information on the uniformity of the air flow is generated.
Through adopting above-mentioned technical scheme, the side of giving vent to anger of product tool is encircleed and is provided with a plurality of pressure sensor that gives vent to anger, is convenient for detect the air that sees through sheet material before the stationary detection period and does not faceThe uniformity of flow in the same direction, and the air outlet pressure values and corresponding time nodes measured by each air outlet pressure sensor in the unsteady detection period are collected according to a preset sampling frequency, so that a plurality of pressure-time information are generated, and the change condition of air pressure born by different positions of the air outlet measurement of the product jig in the unsteady detection period along with time is known; acquiring a corresponding pressure value array A from each pressure-time information according to time sequence i1 、A i2 、……A in Calculating a pressure deviation parameter, wherein when the pressure deviation parameter is larger, the larger the difference of the air pressures of different positions of the air measurement of the product jig in the unsteady detection period is, the larger the pressure deviation parameter is; when the pressure deviation parameter is larger than a preset deviation parameter threshold value, generating air flow uniformity abnormal information so that a detector can know that the sheet material to be detected currently has poor ventilation uniformity, such as breakage or product quality.
The third object of the present application is achieved by the following technical scheme:
a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the sheet material breathability flow test method described above when the computer program is executed.
The fourth object of the present application is achieved by the following technical scheme:
a computer readable storage medium storing a computer program which, when executed by a processor, performs the steps of the sheet material breathability flow test method described above.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the air permeability tester comprises an air source device, a pressure regulating assembly, a product jig and a flowmeter, wherein the air source device is used for supplying high-pressure air for carrying out air permeability flow test, the pressure regulating assembly is used for regulating air pressure of the air supplied by the air source device, the air pressure input to the product jig is regulated to be a required specific value, the product jig is used for placing a sheet material to be tested so as to fix the sheet material to be tested when the air permeability flow test is required, the flowmeter is used for detecting an air flow value penetrating the sheet material to be tested so as to realize the air permeability flow test of the sheet material to be tested, and the control module is used for controlling all parts of the air permeability tester, so that the automation and intelligent level of the air permeability tester are improved.
2. Shooting an image of the sheet material to be detected and identifying corresponding image feature data so as to identify model information corresponding to the sheet material to be detected through the image feature; according to model information, matching a gas pressure value required by a test corresponding to the sheet material to be tested with a qualified flow interval corresponding to a qualified product from a preset parameter form, and sending a gas pressure regulating value to a pressure regulating assembly so that the pressure regulating assembly can regulate the gas pressure value provided by a gas source device to the sheet material to be tested according to the gas pressure regulating value; and detecting the air flow value passing through the sheet material to be detected to obtain a flow detection value, and comparing the flow detection value with a qualified flow interval, so that detection result information is generated according to a comparison result, and the air permeability detection efficiency of the sheet material is improved.
3. Shooting an image of a sheet material to be detected to obtain an image of the material to be detected, and carrying out image feature recognition on the image of the material to be detected through an image recognition model to obtain image feature data corresponding to the image of the material to be detected; and matching the image characteristic data with a preset image characteristic form, so as to determine model information corresponding to the sheet material to be tested, and facilitate the subsequent determination of the numerical interval of air pressure supply numerical value requirements and corresponding test qualified flow corresponding to the sheet material to be tested.
Drawings
FIG. 1 is a schematic diagram of an air permeability tester according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a product fixture according to an embodiment of the present application.
Fig. 3 is a schematic block diagram of a control module in accordance with an embodiment of the present application.
FIG. 4 is a flow chart of a method of testing the air permeability flow rate of a sheet material in accordance with example two of the present application.
Reference numerals illustrate:
100. an air pipe; 1. a frame; 2. a product jig; 21. a lower template; 22. an upper template; 23. a telescopic rod; 24. and a telescopic cylinder.
Detailed Description
The present application is described in further detail below in conjunction with figures 1 to 4.
Example 1
Referring to fig. 1 and 2, the application discloses a sheet material gas permeability flow test system, including the gas permeability tester, the gas permeability tester includes air supply device, pressure regulating subassembly, product tool 2, flowmeter and control module.
In this embodiment, the connection refers to connection through the air pipe 100, and the connection relationship between the air pipe 100 and each part of the air permeability tester can be set and adjusted according to actual requirements; the air source device is used for supplying high-pressure air required by the air permeability flow test; the pressure regulating assembly comprises a pressure regulating valve, a pressure regulating and stabilizing valve and a one-way throttle valve, wherein the air inlet end of the pressure regulating assembly is communicated with the air outlet end of the air source device, in particular, the air inlet end of the pressure regulating valve is communicated with the air outlet end of the air source device, the air outlet end of the pressure regulating valve is communicated with the air inlet end of the pressure regulating and stabilizing valve and is used for controlling the air pressure output by the air source device and controlling the on-off of an air path between the air source device and the pressure regulating assembly, the pressure regulating valve is connected with a pneumatic foot switch, and the pneumatic foot switch is a switching element which is used for controlling the pressure regulating valve to be opened or closed through a foot pedal, so that a tester can conveniently control the on-off of the pressure regulating valve through the foot pedal to control whether the air source device is communicated with the pressure regulating assembly or not to interfere with the hand actions such as placing sheet materials to be tested and recording test results of the tester, and the manual operation efficiency is improved; the air outlet end of the pressure regulating and stabilizing valve is communicated with the air inlet end of the one-way throttle valve and is used for controlling the air pressure value input to the product jig 2, and the pressure regulating and stabilizing valve is in particular an electric control pressure regulating and stabilizing valve with adjustable opening, so that the accuracy of the air pressure value supplied to the product jig 2 is improved; the air outlet end of the one-way throttle valve is communicated with the product jig 2, and the one-way throttle valve is used for preventing air from flowing back when the pressure regulating valve blocks the air passage.
The product jig 2 is fixedly connected to the frame 1 of the air permeability tester, and the product jig 2 comprises a lower template 21, an upper template 22, a telescopic rod 23 and a telescopic cylinder 24, wherein the telescopic rod 23 and the telescopic cylinder 24 are specifically a piston rod and a cylinder body of an air cylinder; the lower template 21 is fixedly connected to the bottom of the frame 1, the telescopic cylinder 24 is fixedly connected to the top of the frame 1, the telescopic rod 23 is vertically and slidably connected to the telescopic cylinder 24, one end of the telescopic rod 23, which is close to the lower template 21, is fixedly connected with the upper template 22, the projection of the upper template 22 in the vertical direction is opposite to the lower template 21, the telescopic rod 23 and the telescopic cylinder 24 are used for controlling the die assembly/die opening between the upper template 22 and the lower template 21, the upper template 22 and the lower template 21 are used for clamping and fixing a sheet material to be tested when the air permeability flow test is required, a test cavity is formed between the upper template 22 and the lower template 21 when the upper template 22 and the lower template 21 are clamped, the upper template 22 is communicated with the pressure regulating assembly through a soft air pipe 100, the upper template 22 is provided with an air hole for leading air from the pressure regulating assembly into the test cavity, and the flowmeter is arranged in the lower template 21 and used for detecting the air flow value penetrating through the sheet material to be tested so as to realize the air permeability flow test of the sheet material to be tested; the control module is electrically connected with the air source device, the pressure regulating assembly, the product jig 2 and the flowmeter and used for controlling all parts of the air permeability tester, so that the automation and intelligent level of the air permeability tester is improved.
The testing cavity wall of the lower template 21 is also provided with a plurality of air outlet pressure sensors in a surrounding mode, and the number of the air outlet pressure sensors is at least two, and the air outlet pressure sensors are used for detecting air outlet pressure values at different positions of the testing cavity wall before the air flow value measured by the flowmeter is stable, so that uniformity of air flowing through the sheet-shaped material can be judged.
As shown in fig. 3, the control module includes a model information identification module, an air pressure adjustment module, and a detection result generation module. The detailed description of each functional module is as follows:
the model information identification module is used for acquiring image characteristic data of the sheet material to be detected and identifying corresponding model information based on the image characteristic data;
the air pressure adjusting module is used for matching a corresponding air pressure adjusting value with a qualified flow interval from a preset parameter form based on model information and sending the air pressure adjusting value to the pressure adjusting component;
the detection result generation module is used for acquiring a flow detection value and comparing the flow detection value with the qualified flow interval, and generating detection result information based on the comparison result of the flow detection value and the qualified flow interval.
For specific limitations of the control module, reference may be made to the limitations of the sheet material air permeability flow rate testing method hereinafter, and no further description is given here; each of the above-described control modules may be implemented in whole or in part by software, hardware, and combinations thereof; the above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Example two
As shown in fig. 4, the application discloses a method for testing air permeability and flow rate of a sheet material, which is applied to the air permeability and flow rate testing system of any one of the embodiments, and specifically includes the following steps:
s10: and acquiring image characteristic data of the sheet material to be detected, and identifying corresponding model information based on the image characteristic data.
In this embodiment, the sheet material to be measured is a sheet material requiring air permeability detection, such as paper, silk, damping cotton, steel mesh, etc. for audio equipment such as microphones, speakers, etc.; the image characteristic data refer to the data about the image characteristics of the sheet materials of different types, such as the size, color, identification characters and the like of the sheet material products to be detected in the image shot by the sheet materials to be detected; the model information refers to the model of the sheet material product to be measured.
Specifically, an image of the sheet material to be measured is photographed and corresponding image feature data is identified so that model information corresponding to the sheet material to be measured is identified by the image feature.
Wherein, in step S10, it includes:
s11: and acquiring an image of the material to be detected and inputting the image into an image recognition model to recognize corresponding image characteristic data.
In this embodiment, the air permeability tester is further provided with a camera (not shown in the figure) disposed toward the product jig, and the camera is electrically connected to the control module; the image of the material to be detected is an image obtained by shooting the sheet material to be detected; the image recognition model is an algorithm model for carrying out image recognition on the image of the material to be detected, an image comparison algorithm and a character recognition algorithm are arranged in the image recognition model, and the image comparison algorithm and the character recognition algorithm are subjected to the pre-training of a large number of images of various sheet materials to be detected in the unit.
Specifically, an image of a sheet material to be detected is shot by a camera of the air permeability tester to obtain an image of the material to be detected, the image of the material to be detected is input into an image recognition model, and image feature recognition is carried out on the image of the material to be detected by the image recognition model, so that image feature data corresponding to the image of the material to be detected is obtained.
S12: and matching the image characteristic data with a preset image characteristic form to determine corresponding model information.
In this embodiment, the image feature table records image feature data of all sheet material products that may be required to perform the air permeability flow test in the unit, and model information of each type of sheet material products.
Specifically, the image characteristic data is matched with a preset image characteristic form, so that model information corresponding to the sheet material to be tested is determined, and the numerical interval of air pressure supply numerical value corresponding to the sheet material to be tested and corresponding test qualified flow rate can be determined conveniently.
Further, the model information identification module includes:
the image feature recognition sub-module is used for acquiring an image of the material to be detected and inputting the image into the image recognition model so as to recognize corresponding image feature data;
and the model information matching sub-module is used for matching the image characteristic data with a preset image characteristic form so as to determine corresponding model information.
S20: and matching the corresponding air pressure regulating value with a qualified flow interval from a preset parameter form based on the model information, and sending the air pressure regulating value to the pressure regulating component.
In this embodiment, the parameter table records the optional values of the air pressure adjustment values and the data of the qualified flow intervals corresponding to the optional values when various sheet material products perform the air permeability flow test.
Specifically, according to model information, the air pressure value required by the test corresponding to the sheet material to be tested and the qualified flow interval corresponding to the qualified product are matched from a preset parameter form, and the air pressure regulating value is sent to the pressure regulating assembly, so that the pressure regulating assembly can regulate the air pressure value provided by the air source device to the sheet material to be tested according to the air pressure regulating value.
Wherein, in step S20, it includes:
s21: and matching the model information with a preset parameter form, and determining an alternative air pressure value corresponding to the model information and a corresponding qualified flow interval.
In this embodiment, the alternative air pressure value refers to an alternative air pressure adjustment value, and at least one alternative air pressure value may be used for each type of sheet material product.
Specifically, the model information is matched with a preset parameter form, so that an alternative air pressure value required by air permeability flow test work corresponding to the sheet material to be tested in the model and a flow value interval of a corresponding qualified product are determined.
S22: and determining an air pressure regulating value serving as a regulating target of the pressure regulating assembly from the alternative air pressure values, generating an air pressure regulating instruction based on the air pressure regulating value, and sending the air pressure regulating instruction to the pressure regulating assembly.
Specifically, selecting an air pressure regulating value as a regulating target of the pressure regulating assembly from the alternative air pressure values, wherein if a plurality of alternative air pressure values exist, selecting the alternative air pressure value closest to the air pressure regulating value corresponding to the last air permeability flow test as the air pressure regulating value of the air permeability flow test work; and generating an air pressure regulating instruction according to the air pressure regulating value and sending the air pressure regulating instruction to the pressure regulating assembly so as to control the pressure regulating assembly to modulate air supplied by the air source device to the air pressure regulating value and convey the air to the product jig.
Further, the air pressure adjusting module includes:
the model parameter matching sub-module is used for matching the model information with a preset parameter form and determining an alternative air pressure value corresponding to the model information and a corresponding qualified flow interval;
and the air pressure adjusting instruction sending sub-module is used for determining an air pressure adjusting value serving as an adjusting target of the pressure adjusting component from the alternative air pressure values, generating an air pressure adjusting instruction based on the air pressure adjusting value and sending the air pressure adjusting instruction to the pressure adjusting component.
S30: and acquiring a flow detection value, comparing the flow detection value with the qualified flow interval, and generating detection result information based on a comparison result of the flow detection value and the qualified flow interval.
Specifically, after the air permeability flow test work starts, a flow detection value measured by the flowmeter is obtained so as to acquire an air flow value penetrating through the sheet material to be tested, and the flow detection value is compared with a qualified flow interval, so that detection result information is generated according to a comparison result, and the air permeability detection efficiency of the sheet material is improved.
Wherein, in step S30, it includes:
s31: when a test start signal is received, a plurality of flow detection values and corresponding time nodes are acquired according to a preset sampling frequency, and flow-time information is generated.
In this embodiment, the test start signal refers to a signal generated when the air permeability flow rate test starts; the sampling frequency is the frequency of the flowmeter for acquiring flow detection value data, and is preferably 10 times/second; the flow-time information is information in which a flow detection value and a corresponding acquisition time are recorded, and is specifically a flow-time relationship diagram.
Specifically, when a test start signal is received, a plurality of flow detection values and time nodes corresponding to the flow detection values are collected according to a preset sampling frequency, so that flow-time information is generated, and the subsequent analysis of the change condition of the flow detection values along with time after the air permeability flow test is started is facilitated.
S32: and determining a flow detection value of the stable detection period from the flow-time information, and comparing the flow detection value with a corresponding qualified flow interval.
Specifically, after the air permeability flow test is started, the air pressure of the air inlet side of the sheet material to be tested may change along with time, the flow detection value in the stable detection period is obtained from the flow-time information, and the flow detection value in the stable detection period is compared with the corresponding qualified flow interval, so that the accuracy of a comparison result is improved.
S33: if the flow detection value is positioned in the corresponding qualified flow interval, generating qualified detection result information, and if the flow detection value exceeds the corresponding qualified flow interval, generating unqualified detection result information.
Specifically, if the flow detection value is located in the corresponding qualified flow interval, qualified detection result information is generated, and if the flow detection value exceeds the corresponding qualified flow interval, unqualified detection result information is generated, so that the flow detection value is not required to be judged manually, and the judgment efficiency of the detection result is improved conveniently.
Further, the detection result generation module includes:
the flow time relation analysis sub-module is used for acquiring a plurality of flow detection values and corresponding time nodes according to a preset sampling frequency when receiving a test start signal, and generating flow-time information;
the flow value qualification judging sub-module is used for determining a flow detection value in a stable detection period from the flow-time information and comparing the flow detection value with a corresponding qualification flow interval;
and the detection result information generation sub-module is used for generating qualified detection result information if the flow detection value is positioned in the corresponding qualified flow interval, and generating unqualified detection result information if the flow detection value exceeds the corresponding qualified flow interval.
In one embodiment, the sheet material breathability flow test method further comprises:
s40: collecting the air outlet pressure values measured by each air outlet pressure sensor in the unsteady detection period and corresponding time nodes according to a preset sampling frequency, and generating a plurality of pressure-time information;
in this embodiment, the unsteady detection period refers to a period from the start of the air permeability flow rate test to before entering the steady detection period.
Specifically, the air outlet side of the product jig is provided with a plurality of air outlet pressure sensors in a surrounding manner, so that uniformity of air flowing in different directions through the sheet material before a stable detection period can be detected conveniently; and acquiring the air outlet pressure values measured by the air outlet pressure sensors in the unsteady detection period and corresponding time nodes according to the preset sampling frequency, so as to generate a plurality of pressure-time information, and further obtain the change conditions of air pressures born by different positions of the air outlet measurement of the product jig in the unsteady detection period along with time.
S50: acquiring corresponding pressure value series A from a plurality of pressure-time information according to time sequence i1 、A i2 、……A in Calculating a pressure deviation parameter
In this embodiment, each piece of pressure-time information corresponds to a pressure value array, and i is a distinguishing identifier of the pressure value array; n is the number of terms of the pressure value series; a is that ijmax The maximum value of the j-th item in all pressure value series; a is that ijmin The minimum value of the j-th item in all pressure value series;is the average value of the j-th item in all pressure value series.
Specifically, a corresponding pressure value series A is obtained from each pressure-time information according to the time sequence i1 、A i2 、……A in The method comprises the steps of carrying out a first treatment on the surface of the For example, when the pressure-time information is 3 in total, the 3 pressure value series are respectively: a is that 11 、A 12 、……A 1n ；A 21 、A 22 、……A 2n ；A 31 、A 32 、……A 3n The method comprises the steps of carrying out a first treatment on the surface of the According to the formulaCalculating pressure deviation parameters, for example, 3 pressure value series are respectively: 10. 11, … …;10.5, 11.5, … …, 20.5;9.5, 10.5, … …, 19.5, pressure deviation parameter +.>When the pressure deviation parameter is larger, the difference of the air pressures of different positions of the air measurement of the product jig in the unsteady detection period is larger, otherwise, the difference is opposite.
S60: when the pressure deviation parameter N is greater than a preset deviation parameter threshold N 0 In this case, abnormal information on the uniformity of the air flow is generated.
In this embodiment, the deviation parameter threshold value refers to a threshold value for comparing with the pressure deviation parameter to evaluate whether there is abnormality in the uniformity of the air flowing in different directions through the sheet material.
Specifically, the pressure deviation parameter is compared with a preset deviation parameter threshold, and when the pressure deviation parameter is larger than the deviation parameter threshold, abnormal airflow uniformity information is generated, so that a detector can know that the sheet material to be detected currently has poor ventilation uniformity, such as breakage or product quality.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
In one embodiment, a computer device is provided comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
s10: acquiring image characteristic data of a sheet material to be detected, and identifying corresponding model information based on the image characteristic data;
s20: based on model information, matching a corresponding air pressure regulating value with a qualified flow interval from a preset parameter form, and sending the air pressure regulating value to a pressure regulating assembly;
s30: and acquiring a flow detection value, comparing the flow detection value with the qualified flow interval, and generating detection result information based on a comparison result of the flow detection value and the qualified flow interval.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
s10: acquiring image characteristic data of a sheet material to be detected, and identifying corresponding model information based on the image characteristic data;
s20: based on model information, matching a corresponding air pressure regulating value with a qualified flow interval from a preset parameter form, and sending the air pressure regulating value to a pressure regulating assembly;
s30: and acquiring a flow detection value, comparing the flow detection value with the qualified flow interval, and generating detection result information based on a comparison result of the flow detection value and the qualified flow interval.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink), DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand; the technical scheme described in the foregoing embodiments can be modified or some of the features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. The air permeability flow testing system for the sheet material is characterized by comprising an air permeability tester, wherein the air permeability tester comprises an air source device, a pressure regulating assembly, a product jig for placing the sheet material to be tested, a flowmeter and a control module, the air inlet end of the pressure regulating assembly is communicated with the air outlet end of the air source device, the air outlet end of the pressure regulating assembly is communicated with the air inlet end of the product jig, the flowmeter is arranged at the air outlet end of the product jig, and the control module is electrically connected with the air source device, the pressure regulating assembly, the product jig and the flowmeter; the control module includes:
the model information identification module is used for acquiring image characteristic data of the sheet material to be detected and identifying corresponding model information based on the image characteristic data;
the air pressure adjusting module is used for matching a corresponding air pressure adjusting value with a qualified flow interval from a preset parameter form based on model information and sending the air pressure adjusting value to the pressure adjusting component;
the detection result generation module is used for acquiring a flow detection value and comparing the flow detection value with the qualified flow interval, and generating detection result information based on the comparison result of the flow detection value and the qualified flow interval.
2. A sheet material breathability flow test system according to claim 1, wherein: the pressure regulating assembly comprises a pressure regulating valve, a pressure regulating and stabilizing valve and a one-way throttle valve, the pressure regulating valve is communicated with the air source device and the pressure regulating and stabilizing valve, one end of the pressure regulating and stabilizing valve, which is far away from the pressure regulating valve, is communicated with the one-way throttle valve, and one end of the one-way throttle valve, which is far away from the pressure regulating and stabilizing valve, is communicated with the product jig.
3. A sheet material breathability flow test system according to claim 1, wherein: the pressure regulating valve is connected with a pneumatic foot switch.
4. A method for measuring the air permeability and flow rate of a sheet material, which is applied to the air permeability and flow rate measuring system for a sheet material according to any one of claims 1 to 3, comprising:
acquiring image characteristic data of a sheet material to be detected, and identifying corresponding model information based on the image characteristic data;
based on model information, matching a corresponding air pressure regulating value with a qualified flow interval from a preset parameter form, and sending the air pressure regulating value to a pressure regulating assembly;
and acquiring a flow detection value, comparing the flow detection value with the qualified flow interval, and generating detection result information based on a comparison result of the flow detection value and the qualified flow interval.
5. The method for measuring the air permeability and flow rate of the sheet material according to claim 4, wherein: the obtaining the image characteristic data of the sheet material to be detected, and identifying the corresponding model information based on the image characteristic data comprises the following steps:
acquiring an image of a material to be detected and inputting the image into an image recognition model to recognize corresponding image characteristic data;
and matching the image characteristic data with a preset image characteristic form to determine corresponding model information.
6. The method for measuring the air permeability and flow rate of the sheet material according to claim 4, wherein: the method for matching the corresponding air pressure regulating value and the qualified flow interval from the preset parameter form based on the model information, and sending the air pressure regulating value to the pressure regulating assembly comprises the following steps:
matching the model information with a preset parameter form, and determining an alternative air pressure value corresponding to the model information and a corresponding qualified flow interval;
and determining an air pressure regulating value serving as a regulating target of the pressure regulating assembly from the alternative air pressure values, generating an air pressure regulating instruction based on the air pressure regulating value, and sending the air pressure regulating instruction to the pressure regulating assembly.
7. The method for measuring the air permeability and flow rate of the sheet material according to claim 4, wherein: the step of obtaining the flow detection value and comparing the flow detection value with the qualified flow interval, and generating detection result information based on the comparison result of the flow detection value and the qualified flow interval, comprises the following steps:
when a test start signal is received, a plurality of flow detection values and corresponding time nodes are acquired according to a preset sampling frequency, and flow-time information is generated;
determining a flow detection value in a stable detection period from the flow-time information, and comparing the flow detection value with a corresponding qualified flow interval;
if the flow detection value is positioned in the corresponding qualified flow interval, generating qualified detection result information, and if the flow detection value exceeds the corresponding qualified flow interval, generating unqualified detection result information;
the test start signal is a signal generated when the air permeability flow rate test starts.
8. The method for measuring the air permeability and flow rate of the sheet material according to claim 4, wherein: the air outlet side of the product jig is also provided with a plurality of air outlet pressure sensors in a surrounding way; the method further comprises the steps of:
collecting the air outlet pressure values measured by each air outlet pressure sensor in the unsteady detection period and corresponding time nodes according to a preset sampling frequency, and generating a plurality of pressure-time information;
acquiring corresponding pressure value series A from a plurality of pressure-time information according to time sequence i1 、A i2 、……A in Calculating a pressure deviation parameter
When the pressure deviation parameter N is greater than a preset deviation parameter threshold N 0 In this case, abnormal information on the uniformity of the air flow is generated.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, carries out the steps of the sheet material breathability flow test method as claimed in any one of claims 4 to 8.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the sheet material breathability flow test method of any one of claims 4 to 8.
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