Data management platform applied to airtightness detection

Abstract

The invention relates to a data management platform applied to air tightness detection. The data management platform comprises a pressure adjusting system, an air tightness detection system and a control management system, the control management system comprises a pressure regulation and control module, a processing module and a detection module, the detection module comprises a time sub-module, a threshold value sub-module and a plurality of measurement point sub-modules, and the pressure regulation and control module is used for controlling the pressure regulation system to carry out closed-loop regulation on target pressure input into the airtightness detection system and enabling the target pressure to be matched with test pressure; the processing module comprises an air tightness detection module, the air tightness detection module automatically judges the detection result of the detected workpiece according to the pressure change in the air tightness detection system, the test time and the judgment threshold value, the control management system integrates the functions of pressure regulation and control, parameter setting, data processing and result judgment, and an operator only needs to preset parameters and place the workpiece; an automatic detection process can be started and related data are recorded, so that the recording workload of operators is reduced; and meanwhile, data loss or errors caused by manual recording are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air tightness detection, and particularly relates to a data management platform applied to air tightness detection. BACKGROUND

[0002] In industrial production, air tightness detection is a key link for guaranteeing workpiece quality and use safety, and is widely applied to fields such as aerospace, automobile manufacturing, pressure vessels and electronic equipment. For example, the sealing performance of workpieces such as automobile engine cylinder blocks, aerospace sealing elements, high-pressure pipe fittings and medical equipment housings directly affects the service life, operation safety and environmental adaptability of products. Traditional air tightness detection is mostly in a mode of manual pressure setting, manual timing and subjective result judgment. Some semi-automatic detection equipment can only realize single pressure point detection, and for complex workpieces that need continuous detection at multiple pressure points, manual parameter switching and equipment starting and stopping are required, the detection process is frequently interrupted, the detection efficiency is reduced, and the pressure adjustment during air tightness detection is mostly open-loop control. Such open-loop control easily leads to rapid pressure rise and fall, resulting in large pressure fluctuation, causing instantaneous leakage (not real leakage) of the workpiece being detected, and causing misjudgment. It also cannot effectively compensate for environmental disturbances such as system leakage and temperature changes, resulting in poor test pressure stability and difficulty in accurately capturing the real leakage signal of the workpiece. SUMMARY

[0003] The purpose of the present application is to provide a data management platform applied to air tightness detection to solve the problems in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the present application is: a data management platform applied to air tightness detection, comprising a pressure regulation system, an air tightness detection system and a control management system. The control management system comprises a pressure regulation module, a processing module and a detection module. The detection module comprises a time submodule, a threshold submodule and a plurality of measurement point submodules. The measurement point submodule is used to set different test pressures of the workpiece being detected. The time submodule is used to set the test time of the workpiece being detected. The threshold submodule is used to set the judgment threshold of the workpiece being detected. The pressure regulation module is used to control the pressure regulation system to perform closed-loop regulation on the target pressure input into the air tightness detection system, and to match the target pressure and the test pressure. The processing module comprises an air tightness detection module, which automatically judges the detection result of the workpiece being detected according to the pressure change, test time and judgment threshold in the air tightness detection system.

[0005] The beneficial effects of the scheme are: 1) closed-loop regulation of the target pressure, so that the target pressure is accurately matched with the test pressure set by the test point sub-module, avoiding pressure deviation caused by manual adjustment; the closed-loop regulation can compensate for system leakage, gas source fluctuations and other disturbances in real time, maintain stable test pressure, and solve the problems of large pressure fluctuation and poor repeatability of detection results in traditional manual adjustment.

[0006] 2) The test point sub-module can flexibly set different numbers and ranges of test pressures, support multi-stage detection, and adapt to different air tightness requirements of workpieces.

[0007] 3) The control and management system integrates pressure regulation, parameter setting, data processing, and result determination functions, so that the operator only needs to preset parameters and put in the workpiece to start the automatic detection process without professional pressure regulation or data processing skills. The processing module automatically outputs the detection result (such as "qualified / unqualified") and records relevant data, reducing the recording workload of the operator and reducing labor costs; at the same time, data loss or errors caused by manual recording are avoided.

[0008] As a preferred embodiment of the application, the pressure regulation module includes a pressure control module and a pressure monitoring module, the pressure control module is used to actively adjust the size of the target pressure, and the pressure monitoring module is used to detect the target pressure in the closed-loop regulation process in real time.

[0009] The beneficial effects of the scheme are: the pressure control module focuses on active adjustment without considering monitoring function, so that the target pressure quickly approaches the set value; the pressure monitoring module focuses on real-time monitoring, continuously collects actual pressure data in the closed-loop regulation, and timely feedbacks the pressure deviation to provide accurate and non-delayed feedback basis for the pressure control module.

[0010] As a preferred embodiment of the application, the pressure control module includes a dynamic control mode and a static control mode, the dynamic control mode performs real-time closed-loop adjustment on the target pressure, and the static control mode performs closed-loop adjustment on the target pressure through an adjustment stage and a natural stabilization stage.

[0011] The beneficial effects of the scheme are: the real-time closed-loop adjustment of the dynamic control mode can quickly compensate for slight leakage, the pressure switching response is fast, and the combination with the automatic process greatly improves the batch detection efficiency; the static control mode accurately increases the pressure through the adjustment stage and eliminates fluctuations through the natural stabilization stage, avoiding pressure noise in dynamic adjustment, making the pressure more stable, and ensuring more accurate air tightness detection.

[0012] As a preferred embodiment of the application, the dynamic control mode includes a change rate sub-module and a stable tolerance sub-module, the change rate sub-module is used to control the maximum change rate of the real-time closed-loop adjustment of the target pressure, and the stable tolerance sub-module is used to control the fluctuation range of the target pressure.

[0013] The beneficial effects of the scheme are: the synergistic effect of the change rate and the stable tolerance forms a closed-loop regulation of double-parameter constraints; the change rate controls the speed of the pressure approaching the target, avoiding overshoot and causing damage to the measured workpiece; The stable tolerance controls the fluctuation of the stable pressure, and through real-time feedback correction of interference such as system leakage and temperature drift, the control module slightly supplements the pressure within the tolerance, avoiding large fluctuations; the combination of the two allows dynamic adjustment to upgrade from rough approximation to precise control, even under fluctuating gas source pressure and changing environmental temperature, the pressure stability can still be maintained.

[0014] As a preferred embodiment of the application, the static control mode includes a change rate submodule, a control limit submodule and a stable limit submodule; the control limit submodule sets a fluctuation threshold of the target pressure according to the test pressure, and the stable limit submodule is used to set the pressure change speed of the target pressure in the natural stable stage.

[0015] The beneficial effects of the scheme are: the control limit submodule sets the pressure fluctuation boundary: to avoid invalid pressure supplement caused by frequent pressure exceeding the target range due to slight system leakage or gas source fluctuation, and to reduce the damage of adjustment action to the stable environment; the stable limit submodule limits the pressure change speed in the natural stable stage: only when the actual change rate of the target pressure is less than or equal to the set value of the stable limit submodule, it is determined that the target pressure is stable, avoiding starting detection when the target pressure is not stable, and ensuring that the detection data reflects the true air tightness performance of the measured workpiece.

[0016] As a preferred embodiment of the application, the pressure monitoring module includes a gauge pressure monitoring mode and an absolute pressure monitoring mode; in the gauge pressure monitoring mode, the target pressure is the value under atmospheric pressure conditions; in the absolute pressure monitoring mode, the target pressure is the value under vacuum conditions; both the gauge pressure monitoring mode and the absolute pressure monitoring mode include unit, resolution, pressure filtering and automatic setting.

[0017] The beneficial effects of the scheme are: the gauge pressure monitoring mode takes atmospheric pressure as the reference, adapts to conventional industrial air tightness detection, and the target pressure directly reflects the pressure difference inside and outside the workpiece, which conforms to the industry's conventional detection logic and does not require additional conversion of atmospheric pressure, and the operation is intuitive; the absolute pressure monitoring mode takes vacuum as the reference, adapts to special scene detection (such as aerospace seals and vacuum equipment), can exclude the interference of atmospheric pressure fluctuation, accurately measures the absolute pressure change of the measured workpiece, and is especially suitable for small leakage detection; the two modes can be switched as needed, the same platform can meet the needs of conventional gauge pressure detection and cover absolute pressure scenes, without the need for additional configuration of special monitoring equipment, reducing the cost of equipment investment.

[0018] As a preferred embodiment of the application, the processing module further includes a preliminary regulation module, which is used to control the pressure regulation system to increase or decrease the pressure of the output gas.

[0019] The beneficial effects of the scheme are that the preliminary regulation module is responsible for the coarse regulation of the target pressure: the output gas pressure is quickly pushed to the vicinity of the target pressure (for example, the target is 100 MPa, and it is first coarsely regulated to 95 MPa), without the need to pay attention to the slight fluctuation, and the basic time for pressure increase or decrease is greatly shortened; and the subsequent closed-loop control of the pressure regulation module is responsible for fine regulation: fine regulation to the target pressure and stabilization on the basis of coarse regulation, avoiding the efficiency waste caused by a single fine regulation mode.

[0020] As a preferred embodiment of the application, the read-write module further comprises a first display module, a second display module and a third display module, the first display module is used for displaying information of the pressure regulation module, the second display module is used for displaying the air tightness detection curve and the air tightness detection chart automatically generated by the air tightness detection module, and the third display module is used for displaying related content of the sensor used for collecting the detection pressure in the air tightness detection process, and the related content comprises a sensor brand and a minimum value of the sensor.

[0021] The beneficial effects of the scheme are that all key information is updated in real time through a visual interface, an operator does not need to interpret complex codes or data logs, and can judge the detection state only through visual feedback; for novice operators, the classified display of information structure is easier to understand, the key nodes of the detection process can be quickly mastered, and the training cost and the operation failure rate are reduced.

[0022] In addition to the technical problems solved by the application, the technical features constituting the technical solutions, and the advantages brought by these technical features, other technical problems solved by the application, other technical features included in the technical solutions, and the advantages brought by these technical features will be further described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an operation management system block diagram of the data management platform applied to the air tightness detection of the application.

[0024] Figure 2 is an air tightness detection curve chart in the data management platform applied to the air tightness detection of the application. DETAILED DESCRIPTION

[0025] The technical solutions of the application will be described in detail below in combination with the drawings of the specification.

[0026] Please refer to Figure 1As shown, the data management platform applied to the air tightness detection of the embodiment, the pressure regulating system, the air tightness detection system and the control management system, the control management system includes a pressure regulating module, a processing module, a read-write module and a detection module, the pressure regulating module is used for controlling the pressure regulating system to close loop regulate the target pressure input into the air tightness detection system. The detection module includes a plurality of measuring point sub-modules, a time sub-module and a threshold sub-module, each measuring point sub-module is used for setting different test pressures of the measured workpiece. Different test pressures are set in each measuring point sub-module. The time sub-module is used for setting the test time of the measured workpiece. The threshold sub-module is used for setting the design standard of the measured workpiece.

[0027] For example, the measured workpiece needs to be subjected to air tightness detection at 5 different test pressure points (5 MPa, 25 MPa, 50 MPa, 75 MPa, 100 MPa) in succession, the test time is 5 min, and then the corresponding test pressure is set in each measuring point sub-module. When the measured workpiece is subjected to air tightness detection, the pressure regulating system adjusts the target pressure to 5 MPa, and at the same time, the pressure in the air tightness detection system reaches 5 MPa, 5 min of air tightness detection is performed, when the detection at 5 MPa is completed, the pressure regulating system adjusts the target pressure to 10 MPa, and at the same time, the pressure in the air tightness detection system reaches 10 MPa, 5 min of air tightness detection is performed, and the air tightness detection is sequentially performed until the air tightness setting of the different test pressures set in all measuring point sub-modules is completed. The processing module is used for recording the data in the air tightness detection process of the measured workpiece and automatically judging the detection result of the measured workpiece.

[0028] The pressure regulating system includes a filter pressure regulator and an electronic air pressure controller, the exhaust end of the electronic air pressure controller is connected through the air tightness detection system, the exhaust end of the electronic air pressure controller and the exhaust end of the filter pressure regulator are both provided with a pressure sensor, and the pressure regulating module controls the electronic air pressure controller to close loop regulate the pressure of the input gas to obtain a target gas matching the test pressure.

[0029] The pressure regulating setting module includes a pressure control module and a pressure monitoring module, the pressure control module is used for actively adjusting the size of the target pressure, and the pressure monitoring module is used for detecting the real-time pressure of the target pressure in the closed loop regulation process.

[0030] The pressure control module includes a dynamic control mode and a static control mode, the dynamic control mode actively and continuously adjusts the pressure of the target air pressure according to the test pressure set in the test pressure sub-module of the detection module, and the static control mode discontinuously and passively corrects the target pressure according to the test pressure set in the test pressure sub-module of the detection module.

[0031] The dynamic control mode includes a rate of change submodule and a stable tolerance submodule. The rate of change submodule is used to control the maximum rate of change of the target pressure, and the rate of change is the maximum pressure change speed that the measured workpiece can withstand. The stable tolerance submodule is used to control the fluctuation range of the target pressure.

[0032] When the voltage controller actively and continuously adjusts the target pressure in the dynamic control mode, the pressure controller will monitor the deviation of the target pressure from the test pressure in real time, and adjust the valve opening in the pressure controller to stabilize the target pressure within the stable tolerance range. This adjustment is uninterrupted, even if the pressure has approached the target value, the pressure controller will still make small adjustments to compensate for system leakage, adiabatic effect and other disturbances, and stabilize the target pressure in real time.

[0033] For example, when the test pressure is 3Mpa, the rate of change submodule is set to 500kpa / min, and the tolerance submodule is set to ±5kpa, the pressure controller will continuously adjust the valve opening in the pressure controller to stabilize the target pressure within the stable tolerance range when the deviation of the target pressure from the test pressure exceeds ±5kpa.

[0034] The static adjustment mode includes a rate of change module, a control limit module and a stable limit module. The control limit module is used to set the fluctuation range of the target pressure, and the stable limit module is used to set the rate of change of the target pressure.

[0035] The static control mode includes a rate of change submodule, a control limit submodule and a stable limit submodule. The control limit submodule sets the fluctuation threshold of the target pressure according to the test pressure, and the stable limit submodule is used to set the rate of change of the target pressure in the natural stabilization stage.

[0036] When the voltage controller uses the static control mode to discontinuously and passively correct the target pressure, the voltage controller adjusts the target pressure in two stages: adjustment stage and natural stabilization stage. The voltage controller actively pushes the target pressure of the gas to the fluctuation threshold only in the adjustment stage. Once the target pressure enters the fluctuation threshold range set by the control limit submodule, the active adjustment is immediately turned off, and the target pressure changes naturally. Only when the pressure exceeds the control limit due to leakage, temperature change and other factors, will the voltage controller restart the adjustment (pressure compensation or exhaust), and stop control again when the pressure returns to the fluctuation threshold range. The pressure controller does not continuously intervene in the target pressure, and the pressure is mainly in a natural stable state.

[0037] For example, the test pressure is set to 3Mpa, the fluctuation threshold in the control limit submodule is set to 2998kPa-3002kPa, and the pressure change speed in the stable limit submodule is set to 0.2kPa / min. When the target pressure of the pressure controller is adjusted to 3001kPa, it enters the natural stability stage. The pressure controller monitors the target pressure change speed in real time. If the target pressure change speed is less than the stable limit 0.2kPa / min, it means that the target pressure meets the subsequent air tightness detection requirements.

[0038] The processing module includes a preliminary control module and an air tightness detection module. The preliminary control module is used to control the pressure regulating system to increase or decrease the pressure of the output gas. The air tightness detection module is used to automatically determine the detection result of the measured workpiece.

[0039] The pressure regulating system further includes a pressure increasing pipeline and a pressure decreasing pipeline. The pressure increasing pipeline and the pressure decreasing pipeline are connected between the electronic pressure controller and the filter pressure regulator. The pressure increasing pipeline includes a gas amplifier. The gas inlet end of the gas amplifier and the gas outlet end of the filter pressure regulator are connected through a pipeline. The gas outlet end of the gas amplifier and the gas inlet end of the electronic pressure controller are connected through a pipeline. An electromagnetic valve is arranged between the gas amplifier and the filter pressure regulator. A one-way valve is arranged between the gas amplifier and the electronic pressure controller. The gas amplifier is connected with a driving gas source through a pipeline. The driving gas source is connected with an electronic proportional valve in the gas amplifier.

[0040] The pressure decreasing pipeline includes a gas pressure reducer. The gas inlet end of the gas pressure reducer and the gas outlet end of the filter pressure regulator are connected through a pipeline. The gas outlet end of the gas pressure reducer and the gas inlet end of the electronic pressure controller are connected through a pipeline. An electromagnetic valve is arranged between the gas pressure reducer and the filter pressure regulator. A one-way valve is arranged between the gas pressure reducer and the electronic pressure controller.

[0041] The preliminary control module compares the pressure of the input gas at the gas outlet end of the filter pressure regulator with the test pressure. According to the comparison result, the preliminary control module controls whether the input gas enters the electronic pressure controller from the pressure increasing pipeline or the pressure decreasing pipeline.

[0042] If the pressure of the input gas is less than the test pressure, the preliminary control module controls the input gas to enter the electronic pressure controller from the pressure increasing pipeline.

[0043] If the pressure of the input gas is greater than or equal to the test pressure, the preliminary control module controls the input gas to enter the electronic pressure controller from the pressure decreasing pipeline.

[0044] The air tightness detection system comprises an interface tool, the interface tool is in through connection with an electronic air pressure controller in an adjusting pipeline, the electronic air pressure controller, the interface tool and a workpiece to be detected form a closed detection space, a one-way valve is arranged between the interface tool and the electronic air pressure controller, and an exhaust end of the one-way valve and an air inlet end of the interface tool are in through connection. The one-way valve only allows the target gas to enter the workpiece to be detected and the interface tool in a positive direction, and once the pressure maintaining starts, the one-way valve also prevents the gas from impacting the electronic air pressure controller in a reverse direction, thereby prolonging the service life of the electronic air pressure controller, and meanwhile, ensuring that the pressure in the pressure maintaining stage is only affected by the leakage of the workpiece to be detected and is not interfered by the upstream pipeline.

[0045] The air tightness detection module generates an air tightness detection curve (as shown in Figure 2 The air tightness detection module generates an air tightness detection curve (as shown in

[0046] The read-write module comprises a first display module, a second display module and a third display module, the first display module is used for displaying the control parameters required for the air tightness detection when the pressure adjustment control module performs closed-loop adjustment, the second display module is used for displaying the air tightness detection curve and the air tightness detection chart automatically generated by the air tightness detection module, and the third display module is used for displaying the related content of the sensor used for collecting the detection pressure in the air tightness detection process, and the related content comprises a sensor brand and a minimum value of the sensor.

[0047] If the embodiment of the present application involves a directional indication (such as up, down, left, right, front, back, etc.), the directional indication is only used to explain the relative position relationship, motion condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indication also changes accordingly.

[0048] The above embodiments only describe the preferred embodiments of the present application, and do not limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by the ordinary engineering technical personnel in the art without departing from the design spirit of the present application shall fall within the protection scope of the claims of the present application.

Claims

1. A data management platform for airtightness testing, characterized in that, This includes a pressure regulation system, an airtightness detection system, and a control and management system; The control and management system includes a pressure regulation module, a processing module, and a detection module. The detection module includes a time submodule, a threshold submodule, and multiple measurement point submodules. The measurement point submodule is used to set different test pressures on the workpiece under test; the time submodule is used to set the test time for the workpiece under test; and the threshold submodule is used to set the judgment threshold for the workpiece under test. The pressure control module is used to control the pressure regulation system to perform closed-loop regulation of the target pressure input to the airtightness detection system and to match the target pressure with the test pressure. The processing module includes an airtightness detection module, which automatically determines the test result of the workpiece based on the pressure changes, test time, and judgment threshold within the airtightness detection system.

2. The data management platform for airtightness testing according to claim 1, characterized in that: The pressure regulation module includes a pressure control module and a pressure monitoring module. The pressure control module is used to actively adjust the magnitude of the target pressure, and the pressure monitoring module is used to detect the target pressure in real time during the closed-loop regulation process.

3. The data management platform for airtightness testing according to claim 2, characterized in that: The pressure control module includes dynamic control mode and static control mode. The dynamic control mode performs real-time closed-loop adjustment of the target pressure, while the static control mode performs closed-loop adjustment of the target pressure through adjustment phase and natural stabilization phase.

4. The data management platform for airtightness testing according to claim 3, characterized in that: The dynamic control mode includes a rate of change submodule and a stability tolerance submodule. The rate of change submodule is used to control the maximum rate of change of the target pressure during real-time closed-loop adjustment, while the stability tolerance submodule is used to control the fluctuation range of the target pressure.

5. The data management platform for airtightness testing according to claim 3, characterized in that: The static control mode includes a rate of change submodule, a control limit submodule, and a stability limit submodule. The control limit submodule sets the fluctuation threshold of the target pressure based on the test pressure, and the stability limit submodule is used to set the rate of pressure change of the target pressure during the natural stabilization phase.

6. The data management platform for airtightness testing according to claim 2, characterized in that: The pressure monitoring module includes a gauge pressure monitoring mode and an absolute pressure monitoring mode. In gauge pressure monitoring mode, the target pressure is the value under atmospheric pressure conditions; in absolute pressure monitoring mode, the target pressure is the value under vacuum conditions. Both gauge pressure monitoring mode and absolute pressure monitoring mode include unit, resolution, pressure filtering, and automatic clearing settings.

7. The data management platform for airtightness testing according to claim 5, characterized in that: The processing module also includes a preliminary control module, which is used to control the pressure regulation system to increase or decrease the pressure of the output gas.

8. The data management platform for airtightness testing according to claim 1, characterized in that: It also includes a read / write module, which comprises a first display module, a second display module, and a third display module. The first display module displays information from the pressure control module, the second display module displays the airtightness test curve and airtightness test chart automatically generated by the airtightness test module, and the third display module displays relevant information about the sensors used to collect test pressure during the airtightness test, including the sensor brand and the sensor's minimum value.

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