Waterproof detection method and waterproof detection system

Abstract

The invention provides a waterproof detection method and a waterproof detection system. The waterproof detection system is suitable for the waterproof detection method. The waterproof detection method comprises the following steps: carrying out an air tightness test on equipment to be detected to obtain a test gas leakage rate; and comparing the test gas leakage rate with the gas leakage rate threshold value, and determining a waterproof detection result of the to-be-tested equipment. The waterproof detection method provided by the invention can perform waterproof detection on the to-be-detected equipment on the production line, and improves the waterproof detection efficiency of the to-be-detected equipment.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and in particular to a waterproof detection method and a waterproof detection system. Background Art

[0002] Actual application scenarios will have certain requirements for the waterproof level of some equipment. In current technology, testing the waterproof level requires water to be applied directly to the equipment, and then the test results are determined based on the water ingress into the equipment. However, using this test method to test the waterproof level of equipment in a production line environment has low test efficiency. Summary of the invention

[0003] In view of this, the present application provides a waterproof detection method and a waterproof detection system, which can perform waterproof detection on a device to be tested on a production line and improve the waterproof detection efficiency of the device to be tested.

[0004] The first aspect of the present application provides a waterproof detection method, which includes: performing an airtightness test on a device to be tested to obtain a test gas leakage amount; comparing the test gas leakage amount with a gas leakage amount threshold to determine a waterproof detection result of the device to be tested.

[0005] In the above embodiment, the waterproof detection method uses the air tightness test result of the device to be tested to obtain the waterproof detection result of the device to be tested. On the one hand, conventional waterproof detection usually needs to be judged by observing whether there is liquid intrusion, while the air tightness test can be judged by measuring the gas leakage, which can standardize and quantify the waterproof detection result of the device to be tested, which is conducive to improving the accuracy of the judgment result and improving the efficiency of the judgment. On the other hand, when performing an air tightness test on the device to be tested, there is no need to dry the device to be tested, which is conducive to improving the waterproof detection efficiency of the device to be tested.

[0006] In some embodiments of the present application, the test gas leakage amount is compared with the gas leakage amount threshold to determine the waterproof test result of the device to be tested, including: when the test gas leakage amount is less than or equal to the gas leakage amount threshold, determining that the waterproof test result of the device to be tested is passed.

[0007] In the above embodiment, the smaller the assembly gap of the device under test, the smaller the test gas leakage of the device under test; and the smaller the assembly gap of the device under test, the better the waterproof effect of the device under test. Therefore, by judging whether the test gas leakage of the device under test is less than a certain value, it can be inferred whether the waterproof test result of the device under test can pass.

[0008] In some embodiments of the present application, the waterproof detection method further includes: performing an airtightness test on a sample device to obtain a sample gas leakage amount; wherein the sample device meets a preset waterproof level; and determining a gas leakage amount threshold value based on the sample gas leakage amount.

[0009] In the above embodiment, the sample device that meets the preset waterproof level requirement can meet the waterproof test result required by the device to be tested, so the sample device can be tested for air tightness to obtain the sample gas leakage. Afterwards, the gas leakage threshold is obtained by the sample gas leakage to serve as a basis for judging the air tightness test result of the device to be tested.

[0010] In some embodiments of the present application, the waterproof detection method also includes: performing a water spray test on the sealing surface of the sample device in different assembly states to determine the critical water inflow state of the sealing surface; wherein different assembly states correspond to different assembly gaps; when the sealing surface is in the critical water inflow state, performing an air tightness test on the sealing surface to obtain a critical gas leakage amount; and determining a gas leakage amount threshold value based on the critical gas leakage amount corresponding to each sealing surface of the sample device.

[0011] In the above embodiment, different assembly gaps will lead to different water inflow states of the sealing surface. By judging the water inflow states of the sealing surface under different assembly gaps, the assembly state of the maximum assembly gap that meets the waterproof requirement (i.e., the critical water inflow state) can be obtained.

[0012] When a certain sealing surface meets the critical water ingress state, at least the sealing surface meets the waterproof requirement. The critical gas leakage obtained by the airtightness test of the sealing surface can be used to determine the gas leakage threshold. Therefore, the gas leakage threshold is obtained by measuring the critical gas leakage of each sealing surface of the sample equipment.

[0013] In some embodiments of the present application, the gas leakage threshold includes a maximum leakage. According to the critical gas leakage corresponding to each sealing surface of the sample device, the gas leakage threshold is determined, including: summing the critical gas leakage corresponding to each sealing surface of the sample device to obtain the maximum leakage. Comparing the test gas leakage with the gas leakage threshold to determine the waterproof test result of the device to be tested, including: when the test gas leakage is less than or equal to the maximum leakage, determining that the waterproof test result of the device to be tested is a pass.

[0014] In the above embodiment, each sealing surface of the sample device corresponds to each sealing surface of the device to be tested. Therefore, if the test gas leakage of the device to be tested is less than or equal to the maximum leakage, it means that the gas leakage of each sealing surface of the device to be tested is small, less than or equal to the critical gas leakage corresponding to the sealing surface. Since the critical gas leakage corresponds to the critical water inflow state, when the gas leakage of each seal is less than or equal to the corresponding critical gas leakage, it means that the assembly gap of the assembly state of each sealing surface is less than or equal to the corresponding assembly gap of the critical water inflow state. Therefore, the waterproof test result of the device to be tested is passed.

[0015] In some embodiments of the present application, an air tightness test is performed on the device to be tested to obtain the test gas leakage amount, including: injecting equal amounts of gas into a standard volume tank and the device to be tested, respectively; the volume of the standard volume tank is the same as the volume of the device to be tested; the standard volume tank and the device to be tested are connected, and the gas flow between the standard volume tank and the device to be tested within a preset time period is measured to obtain the test gas leakage amount.

[0016] In the above embodiment, the device to be tested and the standard volume tank are injected with the same amount of gas, so the internal air pressure of the two is equal at the initial moment. Afterwards, if the device to be tested is not completely sealed, the device to be tested will leak to the external environment. The amount of gas exchange between the device to be tested and the external environment is equal to the amount of gas exchange between the device to be tested and the standard volume tank. By setting up a standard volume tank to exchange gas with the device to be tested, there is no need to measure the leaked gas on each sealing surface of the device to be tested separately, thereby simplifying the detection steps of the test gas leakage amount of the device to be tested and improving the detection efficiency.

[0017] In some embodiments of the present application, the test gas leakage amount is compared with the gas leakage amount threshold to determine the waterproof test result of the device to be tested, including: when the test gas leakage amount is greater than the gas leakage amount threshold, performing a water test on the device to be tested; when the water test passes, determining that the waterproof test result of the device to be tested is passed.

[0018] In the above embodiment, the device under test that does not meet the airtightness test requirements can be rechecked, and a water spray test can be performed to actually verify whether the device under test can pass the waterproof test, thereby improving the accuracy of the waterproof test result of the device under test.

[0019] In some embodiments of the present application, when the water spray test is passed, the waterproof detection method further includes: updating the gas leakage threshold value with the test gas leakage.

[0020] In the above embodiment, if the device under test fails the air tightness test but passes the water test, it means that the previously set gas leakage threshold is too small and the requirement can be appropriately relaxed. Therefore, by using the test gas leakage of the device under test that can pass the water test but fails the air tightness test to update the gas leakage threshold, the accuracy of the waterproof test result can be improved, thereby reducing the frequency of water testing of the device under test, which is conducive to improving the waterproof detection efficiency of the device under test.

[0021] In some embodiments of the present application, after the device to be tested is subjected to a water test, the waterproof detection method further includes: when the water test fails, determining that the waterproof detection result of the device to be tested is a test failure and generating a prompt message; wherein the prompt message is used to prompt that it is necessary to improve the accuracy requirements of the assembly process for producing the device to be tested and / or to improve the accuracy requirements of the parts used to assemble the device to be tested.

[0022] In the above embodiment, if the device to be tested fails to pass the water spray test, it means that the waterproof test result of the device to be tested is indeed poor. Therefore, a prompt message can be generated to remind the production personnel to appropriately improve the assembly accuracy of the assembly process and / or the accuracy of the parts to reduce the assembly gap of the new device to be tested, which is conducive to the improved assembly state of the new device to be tested to pass the waterproof test, so that the device to be tested does not need to be tested by water spray test, so as to improve the detection efficiency and help improve the production yield of the device to be tested.

[0023] In some embodiments of the present application, an air tightness test is performed on the device to be tested to obtain a test gas leakage amount, including: performing an air tightness test on the device to be tested to obtain an initial gas leakage amount corresponding to the device to be tested; after performing an air tightness test on each device to be tested in the same group, determining the test gas leakage amount corresponding to each device to be tested in the same group according to the initial gas leakage amount corresponding to each device to be tested in the same group.

[0024] In the above embodiment, a certain number of devices to be tested are taken as a group of devices to be tested. The production processes of the devices to be tested in the same group are similar, and the waterproof capabilities are also similar. Therefore, in order to improve the detection efficiency, after the air tightness test is performed on each device to be tested in the same group, the test gas leakage corresponding to each device to be tested in the same group can be determined according to the initial gas leakage corresponding to each device to be tested in the same group. Then, the test gas leakage is used to identify the waterproof detection results of the group of devices to be tested, without the need to identify the waterproof detection results one by one, thereby improving the waterproof detection efficiency.

[0025] The second aspect of the present application provides a waterproof detection system. The waterproof detection system is applicable to the waterproof detection method as described in any of the above embodiments. The waterproof detection system includes a controller and an airtightness testing device. The airtightness testing device is configured to be arranged on an assembly line for producing a device to be tested, and is configured to test the leakage of a test gas of the device to be tested. The controller is electrically connected or signal-connected to the airtightness testing device. The controller is configured to receive the leakage of the test gas and determine the waterproof detection result of the device to be tested.

[0026] In the above embodiment, the waterproof detection method uses the air tightness test result of the device to be tested to obtain the waterproof detection result of the device to be tested. On the one hand, the waterproof detection in the related art usually needs to be judged by observing whether there is liquid intrusion, which is difficult to quantify and evaluate. The waterproof detection method provided by the present application can be judged by measuring the gas leakage, and can standardize and quantify the waterproof detection result of the device to be tested, which is conducive to improving the accuracy of the judgment result and improving the efficiency of the judgment. On the other hand, when performing an air tightness test on the device to be tested, there is no need to dry the device to be tested, which is conducive to improving the waterproof detection efficiency of the device to be tested. In summary, the waterproof detection method provided by the present application can perform waterproof detection on the device to be tested on the production line and improve the waterproof detection efficiency of the device to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0028] Figure 1 A schematic diagram of the structure of a waterproof detection system provided in one embodiment of the present application;

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the air tightness test device and the equipment to be tested;

[0030] Figure 3 for Figure 1 Schematic diagram of the structure of the air tightness test device and the sample equipment;

[0031] Figure 4 A schematic diagram of a waterproof detection method according to an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a flow chart of another embodiment of the waterproof detection method provided by the present application;

[0033] Figure 6 A schematic diagram of a flow chart of another embodiment of the waterproof detection method provided by the present application;

[0034] Figure 7 A schematic diagram of a flow chart of another embodiment of the waterproof detection method provided by the present application;

[0035] Figure 8 A schematic diagram of a flow chart of another embodiment of the waterproof detection method provided by the present application;

[0036] Fig. 9 A flowchart of another embodiment of the waterproof detection method provided in the present application.

[0037] Main component symbols

[0038] Waterproof detection system 100

[0039] Controller 10

[0040] Air tightness test device 20

[0041] Gas source 21

[0042] Pressure regulating valve 22

[0043] Airtightness tester 23

[0044] Standard volume tank 24

[0045] Solenoid reversing valve 25

[0046] First pipeline 261

[0047] Second pipeline 262

[0048] The third pipeline 263

[0049] Fourth pipeline 264

[0050] Fifth pipeline 265

[0051] Sixth pipeline 266

[0052] Water spraying device 30

[0053] Device under test 200

[0054] Sample equipment 300 DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0057] Furthermore, the terms “first,” “second,” “third,” etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0058] Actual application scenarios will have certain requirements for the waterproof level of some equipment. In current technology, testing the waterproof level requires water to be directly applied to the equipment, and then the test result is determined based on the water ingress into the equipment.

[0059] In the related art, the waterproof test of the equipment is usually carried out directly according to the requirements of the corresponding waterproof level. For example, when the protection level is IP65, it is required that there is no harmful effect when it is directly sprayed with water in any direction; the corresponding detection method is usually to spray the equipment with low pressure in all directions for 3 minutes, and then check the internal water ingress. However, this method is only suitable for small-scale verification of several machines in the product development stage, and reporting to the certification body for IP65 testing of the product, but it cannot be implemented on a large scale on the production line. On the one hand, if the test fails, the inside of the equipment will be damaged by water, which will cause waste of production; on the other hand, if each device on the production line is tested for water, water will cause damage to the equipment on the production line; on the other hand, this detection method requires visual observation to see if water has entered the inside of the equipment, which has large errors and low efficiency.

[0060] Therefore, in a production line environment, it is difficult to use this detection method to perform waterproof detection on equipment, and the detection efficiency is low.

[0061] The embodiments of the present application provide a waterproof detection method and a waterproof detection system. The waterproof detection system is applicable to the waterproof detection method. The waterproof detection method provided by the present application includes: performing an air tightness test on the device to be tested to obtain the test gas leakage; comparing the test gas leakage with the gas leakage threshold, and determining the waterproof detection result of the device to be tested. The waterproof detection method and waterproof detection system provided by the present application use the air tightness test result of the device to be tested to obtain the waterproof detection result of the device to be tested. On the one hand, the waterproof detection in the related art usually needs to be judged by observing whether there is liquid intrusion, which is difficult to quantify and evaluate, while the waterproof detection method and waterproof detection system provided by the present application can be judged by measuring the gas leakage, and can evaluate the waterproof detection result of the device to be tested with quantifiable standards, which is conducive to improving the accuracy of the waterproof detection result and improving the waterproof detection efficiency. On the other hand, when performing an air tightness test on the device to be tested, there is no need to dry the device to be tested, which is conducive to improving the waterproof detection efficiency of the device to be tested.

[0062] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0063] See also Figures 1 to 3, an embodiment of the present application provides a waterproof detection system 100. The waterproof detection system 100 includes a controller 10 and an airtightness testing device 20. The airtightness testing device 20 is configured to be arranged in an assembly line for producing a device to be tested 200, and is configured to test the leakage of a test gas of the device to be tested 200. The controller 10 is electrically connected or signal-connected to the airtightness testing device 20. The controller 10 is configured to communicate with the airtightness testing device 20, receive the leakage of the test gas and determine the waterproof detection result of the device to be tested 200.

[0064] The waterproof detection system 100 uses the air tightness test result of the device to be tested 200 to obtain the waterproof detection result of the device to be tested 200. On the one hand, the waterproof detection in the related art usually needs to be judged by observing whether there is liquid intrusion, which is difficult to quantify and evaluate. The waterproof detection system 100 provided by the present application can make judgments by measuring the amount of gas leakage, and can judge the waterproof detection result of the device to be tested 200 with quantifiable standards, which is conducive to improving the accuracy of the waterproof detection result and improving the waterproof detection efficiency. On the other hand, when performing an air tightness test on the device to be tested 200, there is no need to dry the device to be tested 200, which is conducive to improving the waterproof detection efficiency of the device to be tested 200.

[0065] See also Figure 2 and Figure 3 In some embodiments, the air tightness testing device 20 includes an air source 21, a pressure regulating valve 22, an air tightness tester 23, and a standard volume tank 24. The air source 21 is connected to the standard volume tank 24 through the pressure regulating valve 22.

[0066] like Figure 2 As shown, when the air tightness test device 20 is used to perform an air tightness test on the device under test 200, the gas source 21 is connected to the device under test 200 through the pressure regulating valve 22, and the standard volume tank 24 is connected to the device under test 200 through the air tightness tester 23.

[0067] like Figure 3 As shown, when the air tightness testing device 20 is used to test the sample device 300 , the gas source 21 is connected to the sample device 300 through the pressure regulating valve 22 , and the standard volume tank 24 is connected to the sample device 300 through the air tightness tester 23 .

[0068] The airtightness tester 23 can measure the gas flow rate passing through the airtightness tester 23 .

[0069] See also Figure 2 and Figure 3In some embodiments, the airtightness test device 20 further includes an electromagnetic reversing valve 25. The gas source 21 is connected to the pressure regulating valve 22 through the first pipeline 261. The pressure regulating valve 22 is connected to the electromagnetic reversing valve 25 through the second pipeline 262. The electromagnetic reversing valve 25 is connected to the standard volume tank 24 through the third pipeline 263. The electromagnetic reversing valve 25 is connected to the airtightness tester 23 through the fourth pipeline 264. The airtightness tester 23 is connected to the device to be tested 200 through the fifth pipeline 265, or the airtightness tester 23 is connected to the sample device 300 through the sixth pipeline 266.

[0070] When the electromagnetic reversing valve 25 is connected to the second pipeline 262 and the third pipeline 263 , the gas source 21 can inject gas into the standard volume tank 24 .

[0071] When the electromagnetic reversing valve 25 connects the second pipeline 262 and the fourth pipeline 264 , and the airtightness tester 23 connects with the device under test 200 through the fifth pipeline 265 , the gas source 21 can inject gas into the device under test 200 .

[0072] When the electromagnetic reversing valve 25 connects the third pipeline 263 and the fourth pipeline 264 , and the airtightness tester 23 connects to the device under test 200 through the fifth pipeline 265 , the airtightness tester 23 can measure the flow rate of gas between the standard volume tank 24 and the device under test 200 .

[0073] When the electromagnetic reversing valve 25 connects the second pipeline 262 and the fourth pipeline 264 , and the airtightness tester 23 connects with the sample device 300 through the sixth pipeline 266 , the gas source 21 can inject gas into the sample device 300 .

[0074] When the electromagnetic reversing valve 25 connects the third pipeline 263 and the fourth pipeline 264 , and the airtight tester 23 connects with the sample device 300 through the sixth pipeline 266 , the airtight tester 23 can measure the flow rate of gas between the standard volume tank 24 and the sample device 300 .

[0075] See also Figures 1 to 3 In some embodiments, the waterproof detection system 100 further includes a water spraying device 30. The water spraying device 30 is configured to spray water onto the device under test 200 or onto the sample device 300. The controller 10 is electrically connected or signal-connected to the water spraying device 30. The controller 10 is configured to control the water spraying device 30 to spray water onto the device under test 200 or the sample device 300.

[0076] See also Figure 4 , Figure 4 A waterproof detection method is provided in one embodiment of the present application. The waterproof detection method can be used to perform waterproof detection on the equipment to be tested produced by the assembly line operation on the production line. Figure 4 As shown, the process includes the following steps S401 to S402.

[0077] Step S401, performing an air tightness test on the device to be tested to obtain the leakage amount of the test gas.

[0078] When performing an air tightness test on the device under test, the device under test may be inflated with air, or the device under test may be evacuated with air.

[0079] In some embodiments, when performing an air tightness test on the device to be tested, the device to be tested can be inflated. After inflation, the air pressure in the device to be tested is greater than the air pressure of the external environment. At this time, if the device to be tested is not a completely sealed device, the device to be tested will leak air to the external environment through various through holes and gaps (such as assembly gaps). At this time, the amount of gas released by the device to be tested to the external environment within a limited time can be measured to obtain the test gas leakage amount.

[0080] In other embodiments, when performing an air tightness test on the device to be tested, the device to be tested may also be evacuated. After evacuation, the air pressure of the device to be tested is less than the air pressure of the external environment. At this time, if the device to be tested is not a completely sealed device, the device to be tested will absorb air from the external environment through various through holes and gaps (such as assembly gaps). At this time, the amount of gas absorbed by the device to be tested from the external environment within a limited time can be measured to obtain the test gas leakage amount.

[0081] Step S402, comparing the test gas leakage amount with the gas leakage amount threshold, and determining the waterproof test result of the device to be tested.

[0082] In an embodiment of the present application, a value can be determined as a gas leakage threshold value according to the needs of the actual scenario, the test gas leakage amount obtained in step S401 is compared with the gas leakage threshold value, and the waterproof test result of the device to be tested is inferred based on the comparison result.

[0083] The waterproof detection method in the present application utilizes the air tightness test results of the device to be tested to obtain the waterproof detection results of the device to be tested. On the one hand, the waterproof detection in the related art usually needs to be judged by observing whether there is liquid intrusion, which is difficult to quantify and evaluate. The waterproof detection method provided by the present application can be judged by measuring the gas leakage amount, and can judge the waterproof detection results of the device to be tested with quantifiable standards, which is conducive to improving the accuracy of the waterproof detection results and improving the efficiency of waterproof detection. On the other hand, when performing an air tightness test on the device to be tested, there is no need to dry the device to be tested, which is conducive to improving the waterproof detection efficiency of the device to be tested.

[0084] It is understandable that in some embodiments, by applying the waterproof detection method provided in the embodiments of the present application, each device to be tested on the production line can be tested for waterproofness. In other embodiments, a sampling test can also be performed on some of the devices to be tested on the production line.

[0085] In some embodiments of the present application, when the test gas leakage amount is less than or equal to the gas leakage amount threshold, it is determined that the waterproof test result of the device to be tested is passed.

[0086] Specifically, the smaller the assembly gap of the device under test, the smaller the test gas leakage of the device under test; and the smaller the assembly gap of the device under test, the better the waterproof effect of the device under test. Therefore, by judging whether the test gas leakage of the device under test is less than a certain value, it is inferred whether the waterproof test result of the device under test can pass.

[0087] Therefore, after obtaining the test gas leakage and the gas leakage threshold, the test gas leakage can be compared with the gas leakage threshold. If the comparison result is that the test gas leakage is not greater than the gas leakage threshold, it means that the assembly gap of the device under test is small and the waterproof effect is good. It can be determined that the waterproof test result of the device under test has passed.

[0088] It is understood that in some embodiments, the gas leakage threshold may be a point value or an interval. If the gas leakage threshold is an interval, when the test gas leakage is less than or equal to the maximum value of the interval, the waterproof test result of the device under test is determined to be passed.

[0089] In other embodiments of the present application, when the test gas leakage is greater than the gas leakage threshold, it can be determined that the waterproof test result of the device under test is failure, or the waterproof ability of the device under test can be further tested by other waterproof testing methods.

[0090] See also Figure 5 , Figure 5 A waterproof detection method provided by another embodiment of the present application includes the following steps S501 to S504.

[0091] Step S501, perform air tightness test on the sample device to obtain the sample gas leakage, wherein the sample device meets the preset waterproof level.

[0092] Specifically, the waterproof level that the device under test needs to meet is selected as a preset waterproof level, such as IPX6, IPX8, etc.

[0093] Before mass production of the device to be tested, a device that meets the waterproof level to be tested is selected from multiple devices with the same specifications and models as the device to be tested as a sample device, or a device with the same specifications and models as the device to be tested is adjusted in assembly accuracy to meet the preset waterproof level.

[0094] Then, the air tightness test is performed on the sample device to obtain the gas leakage of the sample. The scheme of the air tightness test can refer to the above description and will not be repeated here.

[0095] Step S502: determining a gas leakage threshold according to the sample gas leakage.

[0096] After the sample gas leakage amount is obtained, a gas leakage amount threshold may be determined according to the sample gas leakage amount.

[0097] In some embodiments, after measuring the gas leakage amounts of multiple samples of one or more sample devices, the average, mode, median or other statistical value of the gas leakage amounts of the multiple samples may be calculated as the gas leakage amount threshold.

[0098] In other embodiments, the gas leakage threshold value may be obtained by reducing or increasing a certain value based on the sample gas leakage amount.

[0099] In other embodiments, the gas leakage amount of the sample may be multiplied by a preset proportionality coefficient to obtain a gas leakage amount threshold.

[0100] In other embodiments, the gas leakage threshold may be calculated in other ways, which is not limited in this application.

[0101] Step S503: perform an air tightness test on the device to be tested to obtain the leakage amount of the test gas.

[0102] Step S504, comparing the test gas leakage amount with the gas leakage amount threshold, and determining the waterproof test result of the device to be tested.

[0103] In some embodiments of the present application, the specific description of step S503 and step S504 can refer to Figure 4 Step S401 and step S402 in the provided embodiment.

[0104] Since the sample device meets the preset waterproof level, the gas leakage threshold can be obtained through the sample gas leakage to serve as a basis for judging the air tightness test result of the device to be tested.

[0105] It can be understood that in some embodiments, when performing an airtightness test on a sample device and obtaining a sample gas leakage amount, it can be that an airtightness test is performed on a sample device once to obtain a sample gas leakage amount, and the gas leakage amount threshold is calculated based on this; or multiple airtightness tests are performed on a sample device to obtain multiple sample gas leakage amounts, and the gas leakage amount threshold is calculated based on the multiple sample gas leakage amounts; or one or more airtightness tests are performed on multiple sample devices to obtain multiple sample gas leakage amounts, and the gas leakage amount threshold is calculated based on the multiple sample gas leakage amounts.

[0106] In some other embodiments of the present application, when performing airtightness test on sample equipment and obtaining the amount of sample gas leakage, there are multiple implementation methods. One of them is:

[0107] Inject equal amounts of gas into the standard volume tank and the sample device, or extract equal amounts of gas; the volume of the standard volume tank is the same as that of the sample device;

[0108] The standard volume tank and the sample device are connected, and the flow rate of gas between the standard volume tank and the sample device within a preset time is measured to obtain the leakage rate of the sample gas.

[0109] It is understood that in some embodiments, the above steps can be combined with Figure 3 The structure shown is executed.

[0110] Combination Figure 3 As shown, it can be understood that in some embodiments, the gas source 21 passes an equal amount of gas into the standard volume tank 24 and the sample device 300, so that an overpressure exceeding the atmospheric pressure is formed in both the standard volume tank 24 and the sample device 300. Since the sample device 300 is not completely sealed, the sample device 300 will leak gas to the external environment, causing the gas pressure in the sample device 300 to decrease and be lower than the gas pressure of the standard volume tank 24. Since the sample device 300 is connected to the standard volume tank 24, the standard volume tank 24 circulates gas to the sample device 300.

[0111] In other embodiments, the gas source 21 extracts an equal amount of gas from the standard volume tank 24 and the sample device 300, so that a negative pressure lower than the atmospheric pressure is formed in both the standard volume tank 24 and the sample device 300. Since the sample device 300 is not completely sealed, the sample device 300 absorbs gas from the external environment, causing the gas pressure in the sample device 300 to increase and be greater than the gas pressure of the standard volume tank 24. Since the sample device 300 is connected to the standard volume tank 24, the sample device 300 will circulate gas to the standard volume tank 24.

[0112] See also Figure 6 , Figure 6 A waterproof detection method provided by another embodiment of the present application includes the following steps S601 to S605.

[0113] Step S601, performing a water spray test on the sealing surface of the sample device in different assembly states to determine the critical water ingress state of the sealing surface.

[0114] Specifically, a device with the same specifications and model as the device to be tested is selected as a sample device, and the assembly state of each sealing surface of the sample device is adjusted.

[0115] The water spray test is carried out under different assembly states of the sealing surface to observe the water leakage of the assembly gap of a sealing surface under different assembly states. Different assembly states correspond to different assembly gaps.

[0116] After the water spray test, the situation of whether there is leakage or not is found as the critical water inflow state of the sealing surface. Alternatively, it can be understood that the assembly state corresponding to the maximum assembly gap without water inflow is taken as the critical water inflow state of the sealing surface.

[0117] In this way, the critical water inflow state of each sealing surface is found.

[0118] Step S602, when the sealing surface is in a critical water inflow state, an air tightness test is performed on the sealing surface to obtain a critical gas leakage amount.

[0119] When the sealing surface is in a critical water inflow state, an air tightness test may be performed on the sealing surface to obtain a critical gas leakage amount corresponding to the sealing surface.

[0120] Specifically, when performing an air tightness test on the sealing surface, other sealing surfaces on the sample device can be completely sealed (for example, by gluing, adding a sealing rubber ring, etc.), and then the sample device is tested for air tightness to obtain the critical gas leakage corresponding to the sealing surface.

[0121] Step S603: determining a gas leakage threshold value according to the critical gas leakage corresponding to each sealing surface of the sample device.

[0122] In some embodiments, the critical gas leakage of each sealing surface is summarized and analyzed, and the gas leakage threshold is calculated by one or more calculation methods such as summation, average, mode, median, maximum, and minimum.

[0123] Step S604, performing an air tightness test on the device to be tested to obtain the leakage amount of the test gas.

[0124] Step S605, comparing the test gas leakage amount with the gas leakage amount threshold to determine the waterproof test result of the device to be tested.

[0125] In some embodiments of the present application, the specific description of step S604 and step S605 can be referred to as follows. Figure 4 Step S401 and step S402 in the provided embodiment.

[0126] Different assembly gaps will lead to different water inflow states of the sealing surface. By judging the critical water inflow state of the sealing surface under different assembly gaps, the assembly state that meets the waterproof requirements can be obtained, thereby obtaining a sample device that meets the waterproof requirements. Moreover, when a certain sealing surface meets the critical water inflow state, at least the sealing surface meets the waterproof requirements. The critical gas leakage obtained by performing an airtightness test on the sealing surface can be used to determine the gas leakage threshold. Therefore, the gas leakage threshold can be calculated by measuring the critical gas leakage of each sealing surface of the sample device.

[0127] It is understandable that in some embodiments, different assembly states correspond to different assembly gaps. The assembly gap can be understood as a gap based on the joint of two parts.

[0128] It can be understood that, in some embodiments, the critical gas leakage amount of the sealing surface is a type of sample gas leakage amount.

[0129] In some embodiments, when different assembly states of the device to be tested or the sample device are selected, the assembly clearances of the sealing surfaces of the device to be tested or the sample device can be changed by adjusting the assembly process of the device to be tested or the sample device or replacing the parts used to assemble the device to be tested or the sample device, thereby changing the assembly state of the device to be tested or the sample device.

[0130] Table 1 is a reference example of the assembly process for producing the equipment to be tested and the sample equipment:

[0131]

[0132]

[0133] In some embodiments, when performing air tightness test on the sealing surface, the following method can be used: Figure 3 The structure provided and the method of performing air tightness test by using a standard container tank described in the above embodiment. When measuring the critical gas leakage corresponding to a sealing surface of the sample device, it is necessary to seal the assembly gap of other sealing surfaces of the sample device, such as by gluing or filming.

[0134] In some embodiments, the gas leakage threshold is an interval, and the gas leakage threshold includes a maximum leakage, which is the maximum value of the interval.

[0135] In some other embodiments of the present application, when determining a gas leakage threshold based on the critical gas leakage corresponding to each sealing surface of the sample device, comparing the test gas leakage with the gas leakage threshold, and determining the waterproof test result of the device to be tested, the following steps are specifically included.

[0136] The critical gas leakage corresponding to each sealing surface of the sample device is summed to obtain the maximum leakage;

[0137] Compare the test gas leakage with the maximum leakage;

[0138] When the test gas leakage is less than or equal to the maximum leakage, it is determined that the waterproof test result of the device to be tested is passed.

[0139] The sealing surfaces of the sample device correspond to the sealing surfaces of the device to be tested. Therefore, in this embodiment, the maximum leakage amount can be used as the gas leakage amount threshold.

[0140] If the test gas leakage of the device under test is greater than the maximum leakage, it means that the gas leakage of at least one sealing surface of the device under test is greater than the critical gas leakage corresponding to the sealing surface. It is possible that the assembly state of at least one sealing surface does not meet the waterproof requirements. Even if one sealing surface of the device under test does not meet the waterproof requirements, the waterproof effect of the device under test cannot meet the standards. Therefore, it can be determined that the waterproof test result of the device under test is failure. Alternatively, the waterproof ability of the device under test can be further tested by other waterproof test methods.

[0141] If the test gas leakage of the device under test is less than or equal to the maximum leakage, it means that each sealing surface of the device under test basically meets the waterproof requirement, and it can be determined that the waterproof test result of the device under test passes the test.

[0142] See also Figure 7 , Figure 7 This is another embodiment of the present application that provides a waterproof detection method. The internal structure of the device under test is complex, and it is difficult to directly measure the amount of gas entering and leaving the device under test. Based on this, when performing the steps of performing an airtightness test on the device under test and obtaining the amount of test gas leakage, the present application proposes the following steps: Figure 7 The embodiment shown includes the following steps S701 to S702.

[0143] Step S701: inject equal amounts of gas into the standard volume tank and the device to be tested, respectively, wherein the volume of the standard volume tank is the same as the volume of the device to be tested.

[0144] Specifically, the gas source can inject an equal amount of gas into the device to be tested and the standard volume tank by means of inflation.

[0145] Step S 702 , connect the standard volume tank and the device to be tested, measure the flow rate of gas between the standard volume tank and the device to be tested within a preset time period, and obtain the leakage rate of the test gas.

[0146] Specifically, according to the test requirements, a set time length is selected as the preset time length. For example, the preset time length may be 5 minutes, 10 minutes, 15 minutes or other time lengths.

[0147] Adjust the standard volume tank and the device to be tested to a state of interconnection. Since the standard volume tank cannot exchange gas with the external environment, while the device to be tested can exchange gas with the external environment through the assembly gap, a pressure difference will be formed between the device to be tested and the standard volume tank, so that the gas flows between the two. The amount of gas flowing between the two is measured by an airtight tester (such as a flow meter) to obtain the test gas leakage amount.

[0148] The same amount of gas is injected into the device under test and the standard volume tank, and the volume of the standard volume tank is the same as that of the device under test, so the internal air pressure of the two is equal, and the amount of gas exchange between the device under test and the external environment is equal to the amount of gas exchange between the device under test and the standard volume tank. By setting up a standard volume tank to exchange gas with the device under test, there is no need to measure the leaked gas on each sealing surface of the device under test, thereby simplifying the detection steps of the test gas leakage of the device under test and improving the detection efficiency.

[0149] The volume of the device under test is the same as that of the sample device, and the volume of the standard volume tank connected to the device under test is the same as that of Figure 3 The provided examples all have the same volume of standard volume tanks used in communication with the sample devices.

[0150] Combination Figure 2 As shown, in some embodiments, equal amounts of gas are introduced into the standard volume tank 24 and the device under test 200, so that an overpressure exceeding the atmospheric pressure is formed in both the standard volume tank 24 and the device under test 200. Afterwards, the device under test 200 leaks gas to the external environment, and the standard volume tank 24 flows gas to the device under test 200.

[0151] In some embodiments, the housing of the device to be tested is provided with an opening. The opening is used to install an explosion-proof valve. The standard volume tank is connected to the device to be tested through the opening. The gas source can also inject gas into the device to be tested through the opening.

[0152] In other embodiments of the present application, when executing the step of comparing the test gas leakage amount with the gas leakage amount threshold to determine the waterproof test result of the device to be tested, the following steps are included: when the test gas leakage amount is greater than the gas leakage amount threshold, performing a water test on the device to be tested; when the water test passes, determining that the waterproof test result of the device to be tested is passed.

[0153] Specifically, for the equipment under test that fails the airtightness test, a water spray test can be performed to observe whether the equipment under test leaks. If no water leaks, it means that the water spray test has passed, and the waterproof test result of the equipment under test is passed. If water leaks, it means that the water spray test has not passed, and the waterproof test result of the equipment under test is failed.

[0154] The equipment under test that does not meet the airtightness test requirements is reviewed, and a water spray test is performed to actually verify whether the equipment under test can pass the waterproof test, thereby improving the accuracy of the waterproof test results of the equipment under test.

[0155] Specifically, in some embodiments, when the test gas leakage is greater than a gas leakage threshold, a water spray test may be performed on the device to be tested.

[0156] It can be understood that in some embodiments, the devices to be tested are usually produced according to a preset assembly process, and the majority of the devices to be tested should pass the waterproof test. That is, most of the devices to be tested can pass the airtightness test, and only a few of the devices to be tested need to undergo a water spray test. Therefore, compared with directly subjecting all the devices to be tested to a water spray test or other water-related test, the waterproof testing method of the present application can still save a lot of time.

[0157] In other embodiments of the present application, when the water spray test passes, the gas leakage threshold is updated with the test gas leakage.

[0158] Specifically, the test gas leakage corresponding to the device under test that failed the air tightness test but passed the water spray test is confirmed, and the test gas leakage is used to update the gas leakage threshold.

[0159] The method for updating the gas leakage threshold value can be selected according to actual needs. For example, in one example, the test gas leakage of the device under test can be used as the new gas leakage threshold value; in another example, the test gas leakage of the device under test and the gas leakage threshold value before the update can be weighted summed to obtain a new gas leakage threshold value; in another example, the test gas leakage of the device under test can be reduced by a certain margin to obtain a new gas leakage threshold value; in other examples, the gas leakage threshold value can also be updated in other ways, which is not limited by the present application.

[0160] In some embodiments, when the gas leakage threshold is the maximum leakage, the maximum leakage may be updated with the test gas leakage.

[0161] If the device under test fails the air tightness test but passes the water test, it means that the originally set gas leakage threshold is too strict and the possibility of misjudgment is high. Therefore, the test gas leakage of the device under test that can pass the water test but fails the air tightness test can be used to update the gas leakage threshold, which can improve the accuracy of the waterproof test result judgment, thereby reducing the frequency of water testing of the device under test, which is conducive to improving the production efficiency of the device under test.

[0162] In other embodiments of the present application, after the water test is performed on the device to be tested, when the water test fails, it is determined that the waterproof test result of the device to be tested is failed and a prompt message is generated.

[0163] The prompt information is used to prompt that the accuracy requirements of the assembly process for producing the device to be tested need to be improved and / or the accuracy requirements of the parts used to assemble the device to be tested need to be improved.

[0164] If the device under test fails to pass the water spray test, it means that the waterproof test result of the device under test is indeed poor. Therefore, by generating prompt information to improve the assembly accuracy of the assembly process and / or the accuracy of the parts can be appropriately improved to reduce the assembly gap of the new device under test, which is conducive to the improved assembly state of the new device under test to pass the waterproof test, so that the device under test does not need to be tested by water spray test again, so as to improve the detection efficiency and help improve the production yield of the device under test.

[0165] It is understandable that in some embodiments, the prompt information may provide an improved prompt for the assembly process for producing the device to be tested or the accuracy requirements for the parts used to assemble the device to be tested. The specific degree of improvement may be set according to the needs of the actual application scenario, and production personnel may gradually debug and judge based on experience.

[0166] As an illustrative example, the prompt information includes but is not limited to lighting up a warning light, emitting a warning sound, issuing a voice broadcast, displaying a warning information on the screen, etc.

[0167] See also Figure 8 , Figure 8 This is a waterproof detection method provided by another embodiment of the present application. When performing the steps of performing air tightness test on the device to be tested and obtaining the test gas leakage, the present application proposes the following steps: Figure 8 The embodiment shown includes the following steps S801 to S802.

[0168] Step S801: performing an air tightness test on the device to be tested to obtain an initial gas leakage amount corresponding to the device to be tested.

[0169] Step S802: after performing air tightness tests on each device under test in the same group, determine the test gas leakage corresponding to each device under test in the same group according to the initial gas leakage corresponding to each device under test in the same group.

[0170] Specifically, after the air tightness test is performed on a certain device under test, the waterproof test result is not given directly. Instead, after the air tightness test is performed on multiple devices under test in the same group, the initial gas leakage of each device under test in the same group is summarized and analyzed to obtain the test gas leakage, which is used as the data representative of the group of devices under test and is used to compare with the gas leakage threshold, so as to obtain the waterproof test result of the entire group of devices under test.

[0171] As an illustrative example, a group of devices under test may include 10, 20, or 30 devices.

[0172] A certain number of devices under test are regarded as a group of devices under test. The production processes of the devices under test in the same group are similar, and the waterproof capabilities are also similar. Therefore, in order to improve the detection efficiency, after the air tightness test is performed on each device under test in the same group, the test gas leakage corresponding to each device under test in the same group can be determined according to the initial gas leakage corresponding to each device under test in the same group. Then, the test gas leakage is used to identify the waterproof detection results of the group of devices under test, without the need to identify the waterproof detection results one by one, thereby improving the waterproof detection efficiency.

[0173] In addition, air tightness testing is performed on each device under test on the production line, which is conducive to judging the waterproof test results of each device under test on the production line.

[0174] In some embodiments of the present application, an average value of multiple initial gas leakage amounts is calculated, and the average value is the test gas leakage amount of the group of devices to be tested; and the test gas leakage amount is compared with a gas leakage amount threshold to determine the waterproof detection result of the group of devices to be tested.

[0175] By improving the production efficiency of the equipment to be tested, the waterproof detection efficiency and the accuracy of the waterproof detection results, the waterproof detection method can be used to detect every equipment to be tested on the production line, which is conducive to ensuring that every equipment produced by the production line can meet the waterproof requirements.

[0176] In other embodiments, the median, mode, maximum, minimum or other statistical value of multiple initial gas leakage amounts can be calculated and used as the test gas leakage amount of the group of devices to be tested; and the test gas leakage amount can be compared with the gas leakage amount threshold to determine the waterproof detection results of the group of devices to be tested.

[0177] In some embodiments, if the test gas leakage of a group of devices under test is greater than a gas leakage threshold, water spray detection is performed on all devices under test in the group.

[0178] In other embodiments, if the test gas leakage of a group of devices under test is greater than the gas leakage threshold, water spraying test is performed on some of the devices under test in the group. For example, in one example, water spraying test can be performed on N devices under test with the largest initial gas leakage in the group. N is a preset positive integer.

[0179] In some embodiments, when performing an air tightness test on a certain device under test, an air tightness test may be performed on it once, and the result of the test may be used as the result of the air tightness test (eg, the initial gas leakage amount or the test gas leakage amount).

[0180] In other embodiments, when performing an airtightness test on a certain device to be tested, multiple airtightness tests may be performed on it, and an average value of the multiple results or other types of statistical values ​​may be used as the result of the airtightness test.

[0181] See also Fig. 9 , Fig. 9 A waterproof detection method provided by another embodiment of the present application includes the following steps S901 to S910.

[0182] Step S901, performing a water spray test on the sealing surface of the sample device in different assembly states to determine the critical water ingress state of the sealing surface.

[0183] Step S902, when the sealing surface is in a critical water inflow state, an air tightness test is performed on the sealing surface to obtain a critical gas leakage amount.

[0184] Step S903, summing up the critical gas leakage corresponding to each sealing surface of the sample device to obtain the maximum leakage of the gas leakage threshold.

[0185] Step S904, performing an air tightness test on the device to be tested to obtain the leakage amount of the test gas.

[0186] Step S905, determining whether the test gas leakage is greater than the maximum leakage.

[0187] If the test gas leakage is not greater than the maximum leakage, step S906 is executed; if the test gas leakage is greater than the maximum leakage, step S907 is executed.

[0188] Step S906, determining that the waterproof test result of the device to be tested is passed.

[0189] Step S907: performing a water spray test on the device to be tested.

[0190] Step S908, determining whether the device to be tested passes the water spray test.

[0191] If the device to be tested passes the water spray test, step S909 is executed; if the device to be tested fails the water spray test, step S910 is executed.

[0192] Step S909: determine that the waterproof test result of the device to be tested is passed and update the gas leakage threshold with the test gas leakage.

[0193] Step S910: determine that the waterproof test result of the device to be tested is failure and generate a prompt message.

[0194] For the specific contents of the above steps S901 to S910, reference may be made to the description of the relevant contents in the above embodiments, which will not be repeated here.

[0195] The waterproof detection method and waterproof detection system in the present application utilize the air tightness test result of the device under test 200 to obtain the waterproof detection result of the device under test 200, and can perform waterproof detection on the device under test 200 on the production line and improve the waterproof detection efficiency of the device under test 200.

[0196] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.

Claims

1. A waterproof detection method, characterized in that: include: Perform air tightness test on the equipment to be tested to obtain the leakage amount of the test gas; The test gas leakage amount is compared with the gas leakage amount threshold to determine the waterproof test result of the device under test.

2. The waterproof detection method according to claim 1, characterized in that: The comparing the test gas leakage with the gas leakage threshold to determine the waterproof test result of the device under test includes: When the test gas leakage amount is less than or equal to the gas leakage amount threshold, it is determined that the waterproof test result of the device to be tested is passed.

3. The waterproof detection method according to claim 1, characterized in that: The waterproof detection method further comprises: Performing an air tightness test on the sample equipment to obtain the gas leakage of the sample; the sample equipment meets the preset waterproof level; The gas leakage threshold is determined according to the sample gas leakage.

4. The waterproof detection method according to claim 1, characterized in that: The waterproof detection method further comprises: Performing a water spray test on the sealing surface of the sample device in different assembly states to determine the critical water ingress state of the sealing surface; wherein different assembly states correspond to different assembly gaps; When the sealing surface is in a critical water inflow state, performing an air tightness test on the sealing surface to obtain a critical gas leakage amount; The gas leakage threshold is determined according to the critical gas leakage corresponding to each of the sealing surfaces of the sample device.

5. The waterproof detection method according to claim 1, characterized in that: The air tightness test of the equipment to be tested is performed to obtain the leakage of the test gas, including: Injecting equal amounts of gas into the standard volume tank and the device to be tested respectively; the volume of the standard volume tank is the same as the volume of the device to be tested; The standard volume tank is connected to the device under test, and the flow rate of gas between the standard volume tank and the device under test within a preset time period is measured to obtain the leakage rate of the test gas.

6. The waterproof detection method according to claim 1, characterized in that: The comparing the test gas leakage with the gas leakage threshold to determine the waterproof test result of the device under test includes: When the test gas leakage is greater than the gas leakage threshold, performing a water spray test on the device to be tested; When the water spray test is passed, it is determined that the waterproof test result of the device to be tested is passed.

7. The waterproof detection method according to claim 6, characterized in that: When the water spray test is passed, the waterproof detection method further includes: The gas leakage threshold is updated using the test gas leakage.

8. The waterproof detection method according to claim 6, characterized in that: After the water spray test is performed on the device to be tested, the waterproof detection method further includes: When the water spray test fails, the waterproof test result of the device under test is determined to be a test failure, and a prompt message is generated; the prompt message is used to prompt that the accuracy requirements of the assembly process for producing the device under test need to be improved and / or the accuracy requirements of the parts used to assemble the device under test need to be improved.

9. The waterproof detection method according to claim 1, characterized in that: The air tightness test of the equipment to be tested is performed to obtain the leakage of the test gas, including: Performing an air tightness test on the device under test to obtain an initial gas leakage amount corresponding to the device under test; After the air tightness test is performed on each of the devices under test in the same group, the test gas leakage corresponding to each of the devices under test in the same group is determined according to the initial gas leakage corresponding to each of the devices under test in the same group.

10. A waterproof detection system, characterized in that: Applicable to the waterproof detection method described in any one of claims 1 to 9, the waterproof detection system includes a controller and an airtightness testing device, the airtightness testing device is configured to be arranged on an assembly line for producing the device to be tested, and is configured to test the leakage amount of the test gas of the device to be tested, the controller is electrically connected or signal-connected to the airtightness testing device, and the controller is configured to receive the leakage amount of the test gas and determine the waterproof detection result of the device to be tested.

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