High-reliability differential pressure airtightness test system, method and device

Abstract

The embodiment of the invention discloses a high-reliability differential pressure air tightness test system, method and device, and the system comprises a control unit, a test pressure sensor, a balance valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a tested object and a reference object. After inflation is completed, a balance stage is started, then an isolation valve, a balance valve and an exhaust valve are controlled to be closed, a test stage is started, pressure data of a tested object end and pressure data of a reference object end collected by a differential pressure sensor are obtained, and whether the tested object leaks or not is judged by comparing the pressure data of the tested object end and the pressure data of the reference object end; after the test is completed, exhaust is not directly carried out, a balance state is returned firstly, and a test pressure signal is collected and fed back to verify whether a test result is effective or not, so that the reliability of the test is greatly improved through double guarantee, and the problems existing in an existing differential pressure airtight test are solved on the premise that the cost is not increased.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to a high-reliability differential pressure air tightness testing system, method and device. Background Art

[0002] As the demand for air tightness testing increases, the field expands, and the requirements for accuracy continue to increase, the symmetry of the differential pressure leak detector becomes particularly important. In order to ensure the symmetry of the gas path, the direct pressure sensor is usually placed outside the detection gas path, resulting in the system not knowing the test pressure of the test process during the test. The test pressure sensor is outside the isolation valve, and the internal pressure of the workpiece cannot be displayed in real time during the test. The traditional test process includes the inflation stage, the balance stage, and the test stage. Among them, in the inflation stage, the balance valve and the isolation valve are opened, the exhaust valve is closed, and the object to be tested and the reference object are inflated. After the inflation is completed, the balance stage is entered; in the balance stage, the balance valve is closed, and the other valves remain unchanged, that is, the isolation valve is opened, the exhaust valve is closed, and the pressure of the test system is stabilized, and the test stage is entered. At this time, the isolation valve is closed, and the other valves remain unchanged. At this time, the differential pressure sensor judges whether the object to be tested has a leak by comparing the pressure difference between the object to be tested and the reference object. After this, the exhaust stage is entered, the exhaust valve and the isolation valve are opened, the balance valve is closed, and the system is exhausted, which is convenient for disassembly of the object to be tested.

[0003] Since it is known that the system has no leakage during the stabilization process, there are several possible misjudgments: In the first case, the isolation valve is not closed at all. For example, the isolation valve is not closed at the beginning, and the system can complete the entire test process normally. At this time, the differential pressure sensor displays "zero", which can be mistakenly judged as qualified, but in fact, the isolation valve has not been closed from the beginning, and the actual product has not been tested; or, the isolation valve is opened during the test, and the differential pressure sensor does not alarm at this time, for example, the differential pressure sensor does not exceed the judgment standard, nor does it exceed the range, resulting in misjudgment; In the second case, the isolation valve is not opened at all. If the isolation valve is not opened at the beginning, the system can complete the entire test process normally. At this time, the system is not inflated, the test pressure is "zero", and the differential pressure sensor also displays "zero", which can be mistakenly judged as qualified, but in fact, the product has not been tested; In the third case, one or two isolation valves are not closed tightly. When the two isolation valves are not closed tightly, resulting in complete gas leakage during the balance stage, or the test pressure is seriously insufficient, the differential pressure sensor does not alarm. During the test, the differential pressure sensor displays "zero", and the product is mistakenly judged to be qualified; in the fourth case, during the test, the test end and the reference end leak at the same time; in the fifth case, the ball valve at the test port is not opened and the workpiece is not inflated. Summary of the invention

[0004] In view of the above-mentioned defects, an embodiment of the present invention discloses a high-reliability differential pressure air tightness testing system, which can avoid misjudgment of air tightness testing.

[0005] The first aspect of an embodiment of the present invention discloses a high-reliability differential pressure air tightness testing system, comprising: a control unit, a test pressure sensor, a balancing valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a test object and a reference object, wherein the test pressure sensor is connected to one end of the balancing valve, one end of the first isolation valve and one end of the second isolation valve are both connected to one end of the balancing valve, the test object is connected to the other end of the first isolation valve, the reference object is connected to the other end of the second isolation valve, one end of the differential pressure sensor is connected to the other end of the first isolation valve, and the other end of the differential pressure sensor is connected to the other end of the second isolation valve; the other end of the balancing valve is connected to an external input gas source, one end of the exhaust valve is connected to one end of the balancing valve, or the other end of the balancing valve is connected to an external input gas source through the exhaust valve; the test pressure sensor, the balancing valve, the exhaust valve, the first isolation valve, the second isolation valve, and the differential pressure sensor are all connected to the control unit.

[0006] A second aspect of an embodiment of the present invention discloses a high-reliability differential pressure air tightness testing method, comprising:

[0007] In response to the inflation instruction, the inflation channel is activated so that the external gas source inflates the object to be measured and the reference object through the inflation channel;

[0008] When it is detected that the inflation is completed, the control balance valve is closed to enter the air pressure balance state;

[0009] The isolation valve, the balancing valve and the exhaust valve are all controlled to be closed, and the pressure data of the object under test and the pressure data of the reference object collected by the differential pressure sensor are obtained. Based on the pressure data of the object under test and the pressure data of the reference object, it is determined whether the object under test is leaking, and a corresponding test result is generated;

[0010] The control returns to the air pressure balance state, and collects the feedback test pressure signal, and detects whether the test result is valid based on the feedback test pressure signal.

[0011] As an optional implementation manner, in the second aspect of the embodiment of the present invention, it also includes:

[0012] When the test result is valid, the exhaust valve is opened to enter the exhaust state; when the test result is abnormal, an alarm signal is generated.

[0013] As an optional implementation, in the second aspect of the embodiment of the present invention, the starting inflation channel includes:

[0014] Control the balancing valve and isolation valve to open, and control the exhaust valve to close.

[0015] As an optional implementation manner, in the second aspect of the embodiment of the present invention, the air pressure balance state includes:

[0016] The balancing valve and exhaust valve are closed and the isolation valve is opened.

[0017] As an optional implementation, in the second aspect of the embodiment of the present invention, before the isolation valve, the balancing valve and the exhaust valve are all closed, the method further includes:

[0018] The test pressure data is collected continuously. When it is detected that the test pressure data within the preset time range are all within the preset threshold range, the system enters a stable state, controls the isolation valve and the balancing valve to close, and controls the exhaust valve to open.

[0019] As an optional implementation manner, in the second aspect of the embodiment of the present invention, it also includes:

[0020] When the inflation is completed and the air pressure is balanced, the pressure data is continuously collected and monitored through the test pressure sensor;

[0021] Compare the collected monitoring pressure data to see if they are all within the set pressure value range. When the monitoring pressure data is abnormal, an alarm signal is generated.

[0022] A third aspect of an embodiment of the present invention discloses a high-reliability differential pressure airtightness testing device, comprising:

[0023] Inflation module: used to start the inflation channel in response to the inflation instruction, so that the external air source inflates the object to be measured and the reference object through the inflation channel;

[0024] Balancing module: used to control the balancing valve to close to enter the air pressure balance state when the inflation is detected to be completed;

[0025] Test module: used to control the isolation valve, balance valve and exhaust valve to be closed, and obtain the pressure data of the object under test and the pressure data of the reference object collected by the differential pressure sensor, and judge whether the object under test is leaking based on the pressure data of the object under test and the pressure data of the reference object, and generate corresponding test results;

[0026] Comparison module: used to control the return to the air pressure balance state, collect the feedback test pressure signal, and detect whether the test result is valid based on the feedback test pressure signal.

[0027] As an optional implementation manner, in the third aspect of the embodiment of the present invention, it also includes:

[0028] Exhaust module: used to open the exhaust valve to enter the exhaust state when the test result is valid; when the test result is abnormal, generate an alarm signal.

[0029] As an optional implementation, in a third aspect of the embodiment of the present invention, the starting inflation channel includes:

[0030] Control the balancing valve and isolation valve to open, and control the exhaust valve to close.

[0031] As an optional implementation manner, in the third aspect of the embodiment of the present invention, the air pressure balance state includes:

[0032] The balancing valve and exhaust valve are closed and the isolation valve is opened.

[0033] As an optional implementation, in the third aspect of the embodiment of the present invention, before the isolation valve, the balancing valve and the exhaust valve are all closed, the method further includes:

[0034] The test pressure data is collected continuously. When it is detected that the test pressure data within the preset time range are all within the preset threshold range, the system enters a stable state, controls the isolation valve and the balancing valve to close, and controls the exhaust valve to open.

[0035] As an optional implementation manner, in the third aspect of the embodiment of the present invention, it also includes:

[0036] When the inflation is completed and the air pressure is balanced, the pressure data is continuously collected and monitored through the test pressure sensor;

[0037] Compare the collected monitoring pressure data to see if they are all within the set pressure value range. When the monitoring pressure data is abnormal, an alarm signal is generated.

[0038] The fourth aspect of an embodiment of the present invention discloses an electronic device, comprising: a memory storing executable program code; a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the high-reliability differential pressure air tightness testing method disclosed in the second aspect of the embodiment of the present invention.

[0039] A fifth aspect of an embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the high-reliability differential pressure air tightness testing method disclosed in the second aspect of an embodiment of the present invention.

[0040] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0041] The high-reliability differential pressure air tightness testing system provided in the embodiment of the present invention includes a control unit, a test pressure sensor, a balancing valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a test object and a reference object. The embodiment adjusts the action logic between the various components between the systems, enters the balance stage after completing the inflation, and then controls the isolation valve, the balancing valve and the exhaust valve to be closed, enters the test stage, obtains the pressure data of the test object end and the pressure data of the reference object end collected by the differential pressure sensor, and judges whether the test object leaks by comparing the pressure data of the test object end and the pressure data of the reference object end; after the test is completed, the exhaust is not directly performed, but the balance state is returned first, the feedback test pressure signal is collected and fed back, and the algorithm is used to verify whether the test pressure is within the normal range to determine whether the test result is valid. The double guarantee greatly improves the reliability of the test and solves the problems existing in the existing pressure differential test without increasing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a structural schematic diagram of a high-reliability differential pressure air tightness testing system disclosed in an embodiment of the present invention;

[0044] Figure 2 It is another structural schematic diagram of a high-reliability differential pressure air tightness testing system disclosed in an embodiment of the present invention;

[0045] Figure 3 It is another structural schematic diagram of a high-reliability differential pressure air tightness testing system disclosed in an embodiment of the present invention;

[0046] Figure 4 It is a flow chart of a high-reliability differential pressure air tightness testing method disclosed in an embodiment of the present invention;

[0047] Figure 5 It is a structural schematic diagram of a high-reliability differential pressure air tightness testing device provided by an embodiment of the present invention;

[0048] Figure 6 It is a structural schematic diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that the terms "first", "second", "third", "fourth", etc. in the specification and claims of the present invention are used to distinguish different objects rather than to describe a specific order. The terms "including" and "having" in the embodiments of the present invention and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] The embodiment of the present invention discloses a high-reliability differential pressure airtightness testing system, method, device, electronic equipment and storage medium. The high-reliability differential pressure airtightness testing system provided includes a control unit, a test pressure sensor, a balancing valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a test object and a reference object. The embodiment adjusts the action logic between the various components between the systems, enters the balance stage after completing the inflation, and then controls the isolation valve, the balancing valve and the exhaust valve to be closed, enters the test stage, obtains the pressure data of the test object end and the pressure data of the reference object end collected by the differential pressure sensor, and judges whether the test object leaks by comparing the pressure data of the test object end and the pressure data of the reference object end; after the test is completed, the exhaust is not directly performed, but the balance state is returned first, the feedback test pressure signal is collected and fed back, and the test pressure is verified by an algorithm to determine whether the test result is valid. The double guarantee greatly improves the reliability of the test and solves the problems existing in the existing differential pressure test without increasing the cost.

[0052] Embodiment 1

[0053] See also Figure 1 to Figure 2 , Figures 1 to 3 The schematic diagrams of the structures of three different examples of a high reliability differential pressure air tightness test system are shown respectively. Figure 1As shown, the high-reliability differential pressure air tightness test system includes: a control unit (not shown), a test pressure sensor PT, a balancing valve SV1, an exhaust valve SV4, a first isolation valve SV2, a second isolation valve SV3, a differential pressure sensor DP, a test object T and a reference object R, wherein the test pressure sensor PT is connected to one end of the balancing valve SV1, one end of the first isolation valve SV2 and one end of the second isolation valve SV3 are both connected to one end of the balancing valve SV1, the test object T is connected to the other end of the first isolation valve SV2, the reference object R is connected to the other end of the second isolation valve SV3, one end of the differential pressure sensor DP is connected to the other end of the first isolation valve SV2, and the other end of the differential pressure sensor DP is connected to the other end of the second isolation valve SV3; the other end of the balancing valve SV1 is connected to an external input gas source, and one end of the exhaust valve SV4 is connected to one end of the balancing valve SV1; the test pressure sensor PT, the balancing valve SV1, the exhaust valve SV4, the first isolation valve SV2, the second isolation valve SV3, and the differential pressure sensor DP are all connected to the control unit.

[0054] In the embodiment, the control unit is the core of the test system, which is responsible for receiving instructions, controlling the switch status of each valve, reading sensor data, and analyzing and processing the data, and finally obtaining the result of whether the object to be tested is leaking. The test pressure sensor PT is connected to one end of the balance valve SV1 to detect and record the changes in the system air pressure. During the inflation process, the test pressure sensor PT can also feedback the air pressure value to help the control unit determine whether the inflation is completed. In the system, the balance valve connects or disconnects the object to be tested T and the reference object R from the external air source when necessary. The exhaust valve SV4 is used to release the air pressure in the system after the system test is completed to ensure safety. In the embodiment, the exhaust valve SV4 also helps the system to handle another equilibrium state. The differential pressure sensor DP is connected between the object to be tested T and the reference object R. It is used to measure the air pressure difference between the two. It is a key data for determining whether the object to be tested is leaking. The differential pressure sensor DP sends the measured air pressure difference data to the control unit for analysis and processing.

[0055] The embodiment controls the logical relationship of the test pressure sensor PT, the balancing valve SV1, the exhaust valve SV4, the first isolation valve SV2, the second isolation valve SV3, the differential pressure sensor DP, the object to be tested T and the reference object R, including several stages, namely the inflation stage, the first balancing stage, the second balancing stage, the test stage and the exhaust stage. Among them, the logical control of the valves in the inflation stage is the same as the traditional technology, the balancing valve SV1 and the two isolation valves are opened, and the exhaust valve SV4 is closed to realize the inflation of the object to be tested T and the reference object R. After the inflation is completed, it enters the first balancing stage. The detection of the completion of inflation can be verified by the test pressure sensor PT to verify whether the inflation is completed. In the first balancing stage, the balancing valve SV1 and the exhaust valve SV4 are controlled to be closed, and the isolation valve is opened. After reaching the preset air pressure value and being stable for a period of time, the second balancing stage is entered. At this time, the isolation valve and the balancing valve SV1 are closed, and the exhaust valve SV4 is opened. The balancing stage is different from the traditional technology. The traditional technology is only a single balance. The present embodiment adopts a double balance, which can ensure that the pressure is more stable and the test results are more reliable. In this stage, the exhaust valve of the traditional technology is in a closed state, while the exhaust valve of the present invention is in an open state at this stage. The main purpose is to vent the pressure between the balancing valve SV1 and the isolation valve to avoid the direct pressure of the balancing valve and the isolation valve affecting the test results due to the sealing problem of the isolation valve. Then enter the test stage, at this time, the isolation valve, the balancing valve SV1 and the exhaust valve SV4 are fully closed, and the differential pressure sensor DP judges whether there is a leak in the object to be tested by comparing the pressure difference between the object to be tested and the reference object. After the test, instead of exhausting directly, the balance valve SV1 and the exhaust valve SV4 are closed, the isolation valve is opened, and the system returns to the first equilibrium state. This process is regarded as a pressure division process. The pressure of the system at this time can be calculated through the relationship between volume and pressure, and the pressure of the system at this time can be monitored by the test pressure sensor. The deviation of the actual result when comparing the theoretical test result can be used to determine whether the test is effective. When the pressure fed back is within the qualified range, the exhaust valve is opened for exhaust. When the pressure fed back is not within the qualified range, an alarm is triggered.

[0056] In another example, Figure 2 As shown, the differential pressure air tightness test system of the embodiment includes the parts and Figure 1The differential pressure air tightness test system shown is exactly the same, but there are differences in the connection relationship, mainly the installation position of the exhaust valve SV4. Specifically, the test pressure sensor PT is connected to one end of the balancing valve SV1, one end of the first isolation valve SV2 and one end of the second isolation valve SV3 are both connected to one end of the balancing valve SV1, the object to be tested T is connected to the other end of the first isolation valve SV2, the reference object R is connected to the other end of the second isolation valve SV3, one end of the differential pressure sensor DP is connected to the other end of the first isolation valve SV2, and the other end of the differential pressure sensor DP is connected to the other end of the second isolation valve SV3; the other end of the balancing valve SV1 is connected to the external input gas source through the exhaust valve SV4; the test pressure sensor PT, the balancing valve SV1, the exhaust valve SV4, the first isolation valve SV2, the second isolation valve SV3, and the differential pressure sensor DP are all connected to the control unit.

[0057] Example Figure 1 Assume that the test pressure is Pt, the atmospheric pressure is P0, and the feedback pressure is Pf. When there is no leakage in the system (the small leakage △P during the test is negligible), then Pt*V2+Pt*V3+P0*V1=Pf*(V1+V2+V3), that is, If the system leaks, for example, the test leakage is △P1 and the reference leakage is △P2, then Pt-△P1)*V2+(Pt-△P2)*V3+P0*V1=Pf'*(V1+V2+V3), that is,

[0058] Example Figure 3 According to the gas circuit shown in the figure, it has an additional pressure division process compared with the conventional test. Assuming that the test pressure = Pt, the atmospheric pressure = P0, and the feedback pressure = Pf, if there is no leakage in the system (the small leakage △P in the test process is negligible), then Pt*V2+Pt*V2+P0*(V1+2V3)=Pf*(V1+2V2+2V3), that is If the system leaks, if the test leakage is △P1 and the reference leakage is △P2, then (Pt-△P1)*V2+(Pt-△P2)*V2+P0*(V1+2V3)=Pf'*(V1+2V2+2V3), that is, After the pressure feedback of the embodiment, the test pressure Pf is within the normal range.

[0059] Embodiment 2

[0060] See also Figure 4 , Figure 4It is a flow chart of a high-reliability differential pressure air tightness testing method disclosed in an embodiment of the present invention. Among them, the execution subject of the method described in the embodiment of the present invention is an execution subject composed of software and / or hardware, and the execution subject can receive relevant information by wired or / and wireless means, and can send certain instructions. Of course, it can also have certain processing functions and storage functions. The execution subject can control multiple devices, such as a remote physical server or cloud server and related software, or it can be a local host or server and related software that performs related operations on a device placed somewhere. In some scenarios, multiple storage devices can also be controlled, and the storage devices can be placed in the same place or different places as the devices. For example Figure 4 As shown, the high-reliability differential pressure airtightness test method includes the following steps:

[0061] 401. In response to an inflation instruction, start an inflation channel so that an external gas source inflates the object to be measured and the reference object through the inflation channel.

[0062] In this step, when the inflation command is received, the corresponding inflation channel is activated, allowing an external gas source, such as compressed air, nitrogen, etc., to inflate the object to be measured and the reference object through the inflation channel, so that the object to be measured and the reference object can directly establish an initial air pressure environment, which is convenient for subsequent detection of the air pressure difference. Specifically, starting the inflation channel also technically controls the balance valve and the isolation valve to open, and closes the exhaust valve.

[0063] 402. When it is detected that the inflation is completed, the balance valve is controlled to close to enter the air pressure balance state.

[0064] During the inflation process, the system will monitor changes in air pressure or flow to determine whether inflation is complete. Once it is detected that the inflation reaches the preset conditions, such as a specified air pressure difference or the flow rate decreases below a specific threshold, inflation is considered complete.

[0065] After the inflation is completed, the control balance valve is closed. The main function of the balance valve is to establish or disconnect the air pressure connection between the object to be measured and the reference object. After closing the balance valve, the object to be measured and the reference object respectively maintain the air pressure inside the device and enter the air pressure balance state. At this time, the air pressure difference between the two will reflect whether there is a leak in the object to be measured. The logical relationship of the valves in the air pressure balance state of the embodiment is that the balance valve and the exhaust valve are closed, and the isolation valve is opened.

[0066] Based on this, the embodiment also proposes a second balancing stage, that is, before executing step 303, the test pressure data is continuously collected, and when it is detected that the test pressure data within the preset time range are all within the preset threshold range, the stable state is entered, and the isolation valve and the balancing valve are controlled to be closed, and the exhaust valve is controlled to be opened. In this step, when it is detected that the test pressure data is relatively stable, the isolation valve and the balancing valve are controlled to be closed, mainly to vent the pressure between the balancing valve and the isolation valve, so as to avoid the pressure between the balancing valve and the isolation valve affecting the test results due to the sealing problem of the isolation valve.

[0067] 403. Control the isolation valve, the balancing valve and the exhaust valve to be closed, and obtain the pressure data of the object under test and the pressure data of the reference object collected by the differential pressure sensor, determine whether the object under test is leaking based on the pressure data of the object under test and the pressure data of the reference object, and generate corresponding test results.

[0068] After the pressure balance stage, while ensuring that the isolation valve, balance valve and exhaust valve are all closed, the system will collect pressure data from the object under test and the reference object through the differential pressure sensor, and compare and analyze the two sets of data. If a significant pressure difference is detected, it is judged that the object under test has a leak, otherwise it is considered that the object under test has no leak. The corresponding test result is generated based on this judgment result.

[0069] 404. Control the return to the air pressure balance state, collect the feedback test pressure signal, and detect whether the test result is valid based on the feedback test pressure signal.

[0070] In order to ensure the accuracy of the test results, a feedback test step is also performed. In this step, the system controls the balancing valve and other valves to return to the air pressure balance state again, collects the test pressure signal at this time, and verifies the previous test results based on this feedback test pressure signal to ensure the validity of the test results. The feedback test pressure signal is compared with the test result, which is equivalent to comparing the deviation between the theoretical result and the measured result. When the pressure fed back is not within the qualified range, an alarm is triggered. If it is within the qualified range, the exhaust step is performed. That is, when the test result is valid, the exhaust valve is opened to enter the exhaust state; when the test result is abnormal, an alarm signal is generated.

[0071] In addition, the embodiment may also include: when the inflation is completed and the air pressure balance state is entered, the monitoring pressure data is continuously collected through the test pressure sensor; the collected monitoring pressure data are compared to see whether they are all within the set pressure value range, and when the monitoring pressure data is abnormal, an alarm signal is generated. This step is to set pressure monitoring in the balance stage. At this time, if there is a leak in the system, when the test pressure sensor detects that the pressure will change significantly, it can be judged whether there is a leak in the system based on the pressure change.

[0072] In the embodiment, for the first situation existing in the prior art, it can be detected that the system has no air pressure feedback and an alarm is directly issued; in the second situation, it can be detected that the system has no air pressure feedback or the feedback pressure is too low and an alarm is issued; in the third situation, it can be detected that there is no air pressure feedback and an alarm is issued; in the fourth situation, it can be detected that there is no air pressure feedback or the feedback air pressure is too low and an alarm is issued; in the fifth situation, it can be detected that the system pressure is too low and an alarm is issued. Therefore, several phenomena that are prone to misjudgment in the prior art can be completely avoided.

[0073] Embodiment 3

[0074] See also Figure 5 , Figure 5 Schematic diagram of a high-reliability differential pressure airtightness testing device disclosed in an embodiment of the present invention. Figure 5 As shown, the high-reliability differential pressure air tightness test device may include: an inflation module 501, a balancing module 502, a testing module 503 and a comparison module 504. The inflation module 501 is used to start the inflation channel in response to the inflation instruction, so that the external gas source inflates the object to be tested and the reference object through the inflation channel; the balancing module 502 is used to control the balancing valve to close to enter the air pressure balance state after the inflation is detected to be completed; the testing module 503 is used to control the isolation valve, the balancing valve and the exhaust valve to close, and obtain the pressure data of the object to be tested and the pressure data of the reference object collected by the differential pressure sensor, and judge whether the object to be tested leaks based on the pressure data of the object to be tested and the pressure data of the reference object, that is, judge whether the object to be tested leaks based on the pressure difference between the object to be tested and the reference object, and generate corresponding test results; the comparison module 504 is used to control the return to the air pressure balance state, and collect the feedback test pressure signal, and detect whether the test result is valid based on the feedback test pressure signal.

[0075] Furthermore, the embodiment also includes an exhaust module, which is used to open the exhaust valve to enter the exhaust state when the test result is valid; when the test result is abnormal, generate an alarm signal.

[0076] In the inflation module, the inflation channel is started, including: controlling the balance valve and the isolation valve to open, and controlling the exhaust valve to close.

[0077] The air pressure balance state of the embodiment includes: the balance valve and the exhaust valve are closed, and the isolation valve is opened.

[0078] Furthermore, before controlling the isolation valve, the balancing valve and the exhaust valve to be closed, a stabilization module is also included for continuously collecting test pressure data. When it is detected that the test pressure data within a preset time range are all within a preset threshold range, a stable state is entered, and the isolation valve and the balancing valve are controlled to be closed, and the exhaust valve is controlled to be opened.

[0079] The embodiment may also include a pressure monitoring module, which is used to continuously collect monitoring pressure data by testing the pressure sensor when inflation is completed and the air pressure balance state is entered; compare whether the collected monitoring pressure data are all within the set pressure value range, and generate an alarm signal when the monitoring pressure data is abnormal.

[0080] Embodiment 4

[0081] See also Figure 6 , Figure 6 Schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. The electronic device may be a computer, a server, etc. Of course, in certain circumstances, it may also be a smart device such as a mobile phone, a tablet computer, a monitoring terminal, and an image acquisition device with processing functions. Figure 6 As shown, the electronic device may include:

[0082] A memory 601 storing executable program codes;

[0083] a processor 602 coupled to the memory 601;

[0084] The processor 602 calls the executable program code stored in the memory 601 to execute part or all of the steps in the high-reliability differential pressure airtightness testing method in the second embodiment.

[0085] An embodiment of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute part or all of the steps in the high-reliability differential pressure airtightness testing method in the second embodiment.

[0086] The embodiment of the present invention further discloses a computer program product, wherein when the computer program product is run on a computer, the computer is enabled to execute part or all of the steps in the high-reliability differential pressure air tightness testing method in the second embodiment.

[0087] An embodiment of the present invention further discloses an application publishing platform, wherein the application publishing platform is used to publish a computer program product, wherein when the computer program product runs on a computer, the computer executes part or all of the steps in the high-reliability differential pressure air tightness testing method in Example 2.

[0088] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place or distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0090] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a memory and includes several requests for a computer device (which can be a personal computer, a server or a network device, etc., specifically a processor in a computer device) to perform some or all of the steps of the method described in each embodiment of the present invention.

[0092] In the embodiments provided by the present invention, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0093] A person of ordinary skill in the art can understand that some or all of the steps in the various methods of the embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0094] The high-reliability differential pressure airtightness testing method, device, electronic device and storage medium disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A high reliability differential pressure air tightness test system, characterized in that: include: A control unit, a test pressure sensor, a balancing valve, an exhaust valve, a first isolation valve, a second isolation valve, a differential pressure sensor, a measured object and a reference object, wherein the test pressure sensor is connected to one end of the balancing valve, one end of the first isolation valve and one end of the second isolation valve are both connected to one end of the balancing valve, the measured object is connected to the other end of the first isolation valve, the reference object is connected to the other end of the second isolation valve, one end of the differential pressure sensor is connected to the other end of the first isolation valve, and the other end of the differential pressure sensor is connected to the other end of the second isolation valve; the other end of the balancing valve is connected to an external input gas source, one end of the exhaust valve is connected to one end of the balancing valve, or the other end of the balancing valve is connected to an external input gas source through the exhaust valve; the test pressure sensor, the balancing valve, the exhaust valve, the first isolation valve, the second isolation valve and the differential pressure sensor are all connected to the control unit.

2. A high-reliability differential pressure airtightness test method, characterized in that: include: In response to the inflation instruction, the inflation channel is activated so that the external gas source inflates the object to be measured and the reference object through the inflation channel; When it is detected that the inflation is completed, the control balance valve is closed to enter the air pressure balance state; The isolation valve, the balancing valve and the exhaust valve are all controlled to be closed, and the pressure data of the object under test and the pressure data of the reference object collected by the differential pressure sensor are obtained. Based on the pressure data of the object under test and the pressure data of the reference object, it is determined whether the object under test is leaking, and a corresponding test result is generated; The control returns to the air pressure balance state, and collects the feedback test pressure signal, and detects whether the test result is valid based on the feedback test pressure signal.

3. The differential pressure air tightness testing method according to claim 2, characterized in that: Also includes: When the test result is valid, opening the exhaust valve to enter an exhaust state; When the test result is abnormal, an alarm signal is generated.

4. The differential pressure air tightness testing method according to claim 2, characterized in that: The starting inflation channel comprises: Control the balancing valve and isolation valve to open, and control the exhaust valve to close.

5. The differential pressure air tightness testing method according to claim 2, characterized in that: The air pressure balance state includes: The balancing valve and exhaust valve are closed and the isolation valve is opened.

6. The differential pressure air tightness testing method according to claim 5, characterized in that: Before the control isolation valve, balancing valve and exhaust valve are closed, it also includes: The test pressure data is collected continuously. When it is detected that the test pressure data within the preset time range are all within the preset threshold range, the system enters a stable state, controls the isolation valve and the balancing valve to close, and controls the exhaust valve to open.

7. The differential pressure air tightness testing method according to claim 2, characterized in that: Also includes: When the inflation is completed and the air pressure is balanced, the pressure data is continuously collected and monitored through the test pressure sensor; Compare the collected monitoring pressure data to see if they are all within the set pressure value range. When the monitoring pressure data is abnormal, an alarm signal is generated.

8. A high-reliability differential pressure airtightness testing device, characterized in that: include: Inflation module: used to start the inflation channel in response to the inflation instruction, so that the external air source inflates the object to be measured and the reference object through the inflation channel; Balancing module: used to control the balancing valve to close to enter the air pressure balance state when the inflation is detected to be completed; Test module: used to control the isolation valve, balance valve and exhaust valve to be closed, and obtain the pressure data of the object under test and the pressure data of the reference object collected by the differential pressure sensor, and judge whether the object under test is leaking based on the pressure data of the object under test and the pressure data of the reference object, and generate corresponding test results; Comparison module: used to control the return to the air pressure balance state, collect the feedback test pressure signal, and detect whether the test result is valid based on the feedback test pressure signal.

9. An electronic device, characterized in that: include: A memory storing executable program code; a processor coupled to the memory; The processor calls the executable program code stored in the memory to execute the high-reliability differential pressure air tightness testing method according to any one of claims 2 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program enables a computer to execute the high-reliability differential pressure airtightness testing method according to any one of claims 2 to 7.

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