Air tightness detection method and device and electronic equipment

Abstract

The invention discloses an air tightness detection method and device and electronic equipment, and the air tightness detection method is used for carrying out air tightness detection on a hydraulic braking system, and comprises the steps: connecting the hydraulic braking system to a detection end of a pipeline; at least two detection modes in the multiple detection modes are selected, and airtightness detection is conducted on the hydraulic braking system in sequence according to a preset sequence; and if the absolute value of the actual pressure value, measured by the sensor, in the pipeline relative to the fluctuation range of the preset pressure value is smaller than or equal to the fluctuation threshold value within the preset duration, it is determined that airtightness detection of the hydraulic braking system is qualified. According to the design, air tightness detection is performed on the hydraulic brake system by selecting at least two detection modes in the multiple detection modes, and the accuracy of air tightness detection can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air tightness detection, and in particular to an air tightness detection method and device and electronic equipment. BACKGROUND

[0002] The hydraulic brake system of an automobile is to realize the deceleration and parking of the vehicle through liquid pressure transmission and friction. When the driver steps on the brake pedal, the force on the brake pedal is transmitted to the master cylinder piston through the push rod, and the piston movement causes the brake fluid in the master cylinder to generate pressure. This pressure is then transmitted to the wheel cylinder piston through the oil pipe, pushing the brake shoe to rotate around the support pin, making the friction plate press tightly on the brake drum or brake disc, thereby generating a brake torque to force the wheels to stop rotating.

[0003] Before loading, the hydraulic brake system of the automobile needs to be detected for air tightness to ensure driving safety. However, in the related art, the air tightness detection method of the hydraulic brake system of the automobile is relatively single, resulting in low accuracy of air tightness detection. Therefore, how to effectively improve the accuracy of the air tightness detection method of the hydraulic brake system has become a problem to be solved. SUMMARY

[0004] The embodiments of the present application provide an air tightness detection method, device and electronic equipment, which can solve the problem of low accuracy of air tightness detection of the hydraulic brake system of the automobile in the related art.

[0005] In a first aspect, the embodiments of the present application provide an air tightness detection method; the air tightness detection method is used for air tightness detection of a hydraulic brake system, and includes the following steps:

[0006] connecting the hydraulic brake system to a detection end of a pipeline;

[0007] selecting at least two detection modes from a plurality of detection modes and detecting the air tightness of the hydraulic brake system in a preset order;

[0008] If the absolute value of the fluctuation range of the actual pressure value measured by the sensor in the pipeline relative to the preset pressure value is less than or equal to the fluctuation threshold value within a preset time period, it is determined that the air tightness detection of the hydraulic brake system is qualified.

[0009] In a second aspect, the embodiments of the present application provide an air tightness detection device; the air tightness detection device is used for air tightness detection of a hydraulic brake system, and the device includes:

[0010] a pipeline, a detection end of the pipeline being used for connecting the hydraulic brake system;

[0011] The mode detection module is connected with the pipeline and is configured to select at least two detection modes from multiple detection modes and perform air tightness detection on the hydraulic braking system in a preset order.

[0012] The air tightness determination module is connected with the mode detection module and is configured to determine that the air tightness detection of the hydraulic braking system is qualified if the absolute value of the fluctuation range of the actual pressure value measured by the sensor of the mode detection module relative to the preset pressure value is less than or equal to the fluctuation threshold within the preset time length.

[0013] In a third aspect, an electronic device is provided. The electronic device includes a processor and a memory storing a computer program. The processor implements the steps of the air tightness detection method when executing the computer program.

[0014] According to the air tightness detection method, device and electronic device, the hydraulic braking system is connected to the detection end of the pipeline, at least two detection modes are selected from multiple detection modes, and air tightness detection is performed on the hydraulic braking system in a preset order. If the absolute value of the fluctuation range of the actual pressure value measured by the sensor relative to the preset pressure value is less than or equal to the fluctuation threshold within the preset time length, it is determined that the air tightness detection of the hydraulic braking system is qualified. In this way, the air tightness of the hydraulic braking system is detected by selecting at least two detection modes from multiple detection modes, and the pressure change in the pipeline under two or more detection modes is measured by designing the preset time length, the preset pressure value and the fluctuation threshold. The air pressure in the pipeline can be determined to be qualified only when the air pressure in the pipeline meets the predetermined conditions under two or more detection modes. The accuracy of the air tightness detection can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The flowchart of the air tightness detection method in one embodiment of the present application is shown in the figure.

[0017] Figure 2 The flowchart of the air tightness detection method in another embodiment of the present application is shown in the figure.

[0018] Figure 3 The flowchart of the air tightness detection method in another embodiment of the present application is shown in the figure.

[0019] Figure 4Flowchart of the air tightness detection method in another embodiment of the present application;

[0020] Figure 5 Flowchart of the air tightness detection method in another embodiment of the present application;

[0021] Figure 6 Flowchart of the air tightness detection method in another embodiment of the present application;

[0022] Figure 7 Flowchart of the air tightness detection method in another embodiment of the present application;

[0023] Figure 8 Flowchart of the air tightness detection method in another embodiment of the present application;

[0024] Figure 9 Flowchart of the air tightness detection method in another embodiment of the present application;

[0025] Figure 10 Flowchart of the air tightness detection method in another embodiment of the present application;

[0026] Figure 11 Structure diagram of the air tightness detection device in an embodiment of the present application;

[0027] Figure 12 Structure diagram of the electronic device in an embodiment of the present application.

[0028] Reference signs: 1, air tightness detection device; 10, pipeline; 11a, air blowing stop valve; 11b, positive pressure stop valve; 11c, pressure sensor; 12a, vacuum stop valve; 12b, relative pressure stop valve; 12c, relative vacuum sensor; 12d, absolute pressure stop valve; 12e, absolute vacuum sensor; 13a, air permeation stop valve; 13b, air permeation valve; 14, vacuum pump; 15, quick plug interface; 2, air source; 3, hydraulic braking system; 41, processor; 42, communication interface; 43, memory; 44, communication bus. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0030] Please refer to Figure 1 , Figure 1A flowchart of a method for detecting air tightness according to an embodiment of the present application. The method for detecting air tightness can be used for detecting air tightness of a product to be tested, such as a hydraulic brake system 3, but is not limited thereto. As shown in FIG. 1, the method for detecting air tightness comprises the following steps: Figure 1

[0031] Step S102: connecting the hydraulic brake system 3 to the detection end of the pipeline 10.

[0032] In step S102, the "detection end" is an end of the pipeline 10 for connecting the product to be tested, such as the hydraulic brake system 3.

[0033] Step S104: selecting at least two detection modes from a plurality of detection modes and detecting air tightness of the hydraulic brake system 3 in a preset order.

[0034] In step S104, considering the different detection results caused by regional differences (such as highlands and basins), temperature differences, etc., a plurality of (more than two) different detection modes are designed, and at least two detection modes are selected to detect air tightness of the product to be tested, such as the hydraulic brake system 3, according to actual needs. It should be noted that the preset order can be set according to actual needs. For example, when the plurality of detection modes include different first detection mode (to be described below), second detection mode (to be described below) and third detection mode (to be described below), the air tightness of the hydraulic brake system 3 can be detected in the order of first detection mode-second detection mode-third detection mode, or in the order of third detection mode-second detection mode-first detection mode. In addition, different detection modes are independent of each other. For example, when the air tightness of the hydraulic brake system 3 is detected in the order of first detection mode-second detection mode-third detection mode, if only the second detection mode and the third detection mode are selected, the air tightness of the hydraulic brake system 3 is first detected by the second detection mode, and after the second detection mode is completed, the air tightness of the hydraulic brake system 3 is detected by the third detection mode.

[0035] Step S106: If the absolute value of the fluctuation range of the actual pressure value measured by the sensor in the pipeline 10 relative to the preset pressure value is less than or equal to the fluctuation threshold value within the preset time period, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified.

[0036] ​In step S106, the preset time length, the preset pressure value and the fluctuation threshold value can be set according to actual needs, which are not limited here; and it can be understood that the specific values of the preset time length, the preset pressure value and the fluctuation threshold value are not the same for different regions or temperatures. The air tightness detection result of the hydraulic brake system 3 can be displayed through relevant paper or electronic data reports, and if it is determined that the air tightness detection of the hydraulic brake system 3 is qualified, the qualified hydraulic brake system 3 can be assembled in the automobile later, and if it is determined that the air tightness detection of the hydraulic brake system 3 is unqualified, the unqualified hydraulic brake system 3 is returned to the factory for repair.

[0037] Based on the air tightness detection method in the embodiments of the present application, the hydraulic brake system 3 is connected to the detection end of the pipeline 10, at least two detection modes of the plurality of detection modes are selected and the air tightness of the hydraulic brake system 3 is detected in a preset order, if the absolute value of the fluctuation range of the actual pressure value measured by the sensor in the pipeline 10 relative to the preset pressure value is less than or equal to the fluctuation threshold value within the preset time length, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified, so that the air tightness of the hydraulic brake system 3 is detected by selecting at least two detection modes of the plurality of detection modes, and the pressure change in the pipeline 10 under two or more detection modes is measured by designing the preset time length, the preset pressure value and the fluctuation threshold value, and the air pressure in the pipeline 10 can be determined to be qualified only when the air tightness of the hydraulic brake system 3 meets the predetermined conditions under two or more detection modes, which can effectively improve the accuracy of the air tightness detection.

[0038] Further, please refer to Figure 2 , Figure 2 is a flowchart of the air tightness detection method in another embodiment of the present application. The plurality of detection modes includes a first detection mode and a second detection mode; as shown in Figure 2 , step S104 includes step S202 and step S204:

[0039] Step S202: if the first detection mode is selected, the gas source 2 is controlled to deliver gas into the pipeline 10 according to the predetermined air pressure, and the pressure sensor 11c is controlled to measure the first pressure value in the pipeline 10; wherein the sensor includes the pressure sensor 11c, and the actual pressure value includes the first pressure value.

[0040] In step S202, the predetermined air pressure can be set according to actual needs, which is not limited here; and it can be understood that the specific values of the predetermined air pressure are not the same for different regions or temperatures.

[0041] Step S204: If the second detection mode is selected, the vacuum pump 14 on the pipeline 10 is controlled to extract gas in the pipeline 10 according to the first predetermined vacuum, and the relative vacuum sensor 12c is controlled to measure the second pressure value in the pipeline 10; wherein the sensor further includes the relative vacuum sensor 12c, and the actual pressure value further includes the second pressure value.

[0042] In step S204, the first predetermined vacuum can be set according to actual needs, which is not limited here; and it can be understood that the specific value of the first predetermined vacuum is also different for different regions or temperatures.

[0043] Further, please refer to Figure 3 , Figure 3 is a flowchart of the air tightness detection method in another embodiment of the present application. As shown in Figure 3 , step S202 includes step S201 before it:

[0044] Step S201: Control the blow-off valve 11a and the positive pressure cutoff valve 11b to be opened; wherein the blow-off valve 11a is arranged on the pipeline 10 between the gas source 2 and the detection end, and the positive pressure cutoff valve 11b is arranged on the pipeline 10 between the pressure sensor 11c and the detection end.

[0045] In step S201, the blow-off valve 11a has an open state and a closed state; in the open state, the gas source 2 is in communication with the pipeline 10, and the gas released by the gas source 2 can flow in the pipeline 10; in the closed state, the gas source 2 is disconnected from the pipeline 10, and the gas released by the gas source 2 cannot flow in the pipeline 10. The positive pressure cutoff valve 11b has an open state and a closed state; in the open state, the positive pressure cutoff valve 11b connects the pressure sensor 11c with the pipeline 10, the gas flow in the pipeline 10 can act on the sensitive element of the pressure sensor 11c, and the pressure sensor 11c can measure the first pressure value in the pipeline 10; in the closed state, the positive pressure cutoff valve 11b blocks the pressure sensor 11c from the pipeline 10, and the gas flow in the pipeline 10 cannot act on the sensitive element of the pressure sensor 11c, and the pressure sensor 11c cannot measure the first pressure value in the pipeline 10. Controlling the blow-off valve 11a and the positive pressure cutoff valve 11b to be opened, the pipeline 10 between the gas source 2 and the pressure sensor 11c is conducted, and at this time the pressure sensor 11c can effectively measure the first pressure value in the pipeline 10. It should be noted that the detection end is connected to the hydraulic braking system 3, when the gas source 2 is opened, the blow-off valve 11a is opened, and the positive pressure cutoff valve 11b is opened, the first pressure value in the pipeline 10 measured by the pressure sensor 11c is the pressure value inside the hydraulic braking system 3 without a leakage point.

[0046] Further, please refer to Figure 3 , Figure 3A flowchart of the air tightness detection method in another embodiment of the present application is shown in FIG. 6. As shown in FIG. 6, step S204 includes step S203: Figure 3

[0047] Step S203: control the vacuum cut-off valve 12a and the relative pressure cut-off valve 12b to be open; wherein the vacuum cut-off valve 12a is arranged on the pipeline 10 between the vacuum pump 14 and the detection end, and the relative pressure cut-off valve 12b is arranged on the pipeline 10 between the relative vacuum sensor 12c and the detection end.

[0048] In step S203, the vacuum cut-off valve 12a has an open state and a closed state; in the open state, the vacuum pump 14 is in communication with the pipeline 10, and the air flow generated under the suction force of the vacuum pump 14 can flow in the pipeline 10; in the closed state, the vacuum pump 14 is disconnected from the pipeline 10, and the air flow generated under the suction force of the vacuum pump 14 cannot flow in the pipeline 10. The relative pressure cut-off valve 12b has an open state and a closed state; in the open state, the relative pressure cut-off valve 12b connects the relative vacuum sensor 12c with the pipeline 10, the air flow flowing in the pipeline 10 can act on the sensitive element of the relative vacuum sensor 12c, and the relative vacuum sensor 12c can measure the second pressure value in the pipeline 10; in the closed state, the relative pressure cut-off valve 12b blocks the relative vacuum sensor 12c from the pipeline 10, and the air flow flowing in the pipeline 10 cannot act on the sensitive element of the relative vacuum sensor 12c, and the relative vacuum sensor 12c cannot measure the second pressure value in the pipeline 10. By controlling the vacuum cut-off valve 12a and the relative pressure cut-off valve 12b to be open, the pipeline 10 between the vacuum pump 14 and the relative vacuum sensor 12c is conducted, and at this time the relative vacuum sensor 12c can effectively measure the second pressure value in the pipeline 10. It should be noted that the detection end is connected to the hydraulic brake system 3, and when the vacuum pump 14 is open, the vacuum cut-off valve 12a is open, and the relative pressure cut-off valve 12b is open, the second pressure value measured by the relative vacuum sensor 12c in the pipeline 10 is the pressure value inside the hydraulic brake system 3 in the absence of a leakage point.

[0049] Further, please refer to Figure 4 , Figure 4 A flowchart of the air tightness detection method in another embodiment of the present application is shown in FIG. 6. As shown in FIG. 6, step S204 includes step S203: Figure 4

[0050] ​​Step S302: If the first detection mode is selected, and the absolute value of the fluctuation range of the first pressure value measured by the pressure sensor 11c in the pipeline 10 relative to the first preset pressure value is less than or equal to the first fluctuation threshold value within the first preset time length, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified; wherein, the preset time length includes the first preset time length, the preset pressure value includes the first preset pressure value, and the fluctuation threshold value includes the first fluctuation threshold value.

[0051] In step S302, the first preset time length, the first preset pressure value and the first fluctuation threshold value can be set according to actual needs, which are not limited here; and it can be understood that the specific values of the first preset time length, the first preset pressure value and the first fluctuation threshold value are also not the same for different regions or temperatures. For example, in the embodiment of the present application, the first preset time length can be 30 seconds, and the first fluctuation threshold value can be 5%, that is, when the first pressure value can be stabilized within the range of plus or minus 5% of the first preset pressure value within 30 seconds, it can be determined that the air tightness detection of the hydraulic brake system 3 is qualified.

[0052] Step S304: If the second detection mode is selected, and the absolute value of the fluctuation range of the second pressure value measured by the vacuum sensor 12c in the pipeline 10 relative to the second preset pressure value is less than or equal to the second fluctuation threshold value within the second preset time length, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified; wherein, the preset time length further includes the second preset time length, the preset pressure value further includes the second preset pressure value, and the fluctuation threshold value further includes the second fluctuation threshold value.

[0053] In step S304, the second preset time length, the second preset pressure value and the second fluctuation threshold value can be set according to actual needs, which are not limited here; and it can be understood that the specific values of the second preset time length, the second preset pressure value and the second fluctuation threshold value are also not the same for different regions or temperatures. For example, in the embodiment of the present application, the second preset time length can be 25 seconds, and the second fluctuation threshold value can be 3%, that is, when the second pressure value can be stabilized within the range of plus or minus 3% of the second preset pressure value within 25 seconds, it can be determined that the air tightness detection of the hydraulic brake system 3 is qualified. It should be noted that the relative vacuum sensor 12c measures the difference between the internal pressure of the pipeline and the atmospheric pressure at the measurement site.

[0054] Further, please refer to Figure 5 , Figure 5 is a flowchart of the air tightness detection method in another embodiment of the present application. The above-mentioned various detection modes further include a third detection mode; as shown in Figure 5 Step S104 further includes step S206:

[0055] Step S206: If the third detection mode is selected, the vacuum pump 14 on the pipeline 10 is controlled to extract gas in the pipeline 10 according to a second predetermined vacuum, and the absolute vacuum sensor 12e is controlled to measure a third pressure value in the pipeline 10; wherein the sensor further includes the absolute vacuum sensor 12e, and the actual pressure value further includes the third pressure value.

[0056] In step S206, the second predetermined vacuum can be set according to actual needs, which is not limited here; and it can be understood that the specific value of the second predetermined vacuum is also different for different regions or temperatures.

[0057] Further, please refer to Figure 6 , Figure 6 for the flowchart of the air tightness detection method in another embodiment of the present application. As shown in Figure 6 , step S106 further includes step S306:

[0058] Step S306: If the third detection mode is selected, the absolute value of the fluctuation range of the third pressure value in the pipeline 10 measured by the absolute vacuum sensor 12e relative to the third preset pressure value within the third preset time length is less than or equal to the third fluctuation threshold value, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified; wherein the preset time length further includes the third preset time length, the preset pressure value further includes the third preset pressure value, and the fluctuation threshold value further includes the third fluctuation threshold value.

[0059] In step S306, the third preset time length, the third preset pressure value and the third fluctuation threshold value can be set according to actual needs, which is not limited here; and it can be understood that the specific values of the third preset time length, the third preset pressure value and the third fluctuation threshold value are also different for different regions or temperatures. For example, in the embodiment of the present application, the third preset time length can be 20 seconds, and the third fluctuation threshold value can be 3%, that is, when the third pressure value can be stably fluctuated within the range of plus or minus 3% of the third preset pressure value within 20 seconds, it is determined that the air tightness detection of the hydraulic brake system 3 is qualified. It should be noted that the absolute vacuum sensor 12e takes absolute vacuum (theoretically zero pressure) as the reference to measure the actual pressure in the pipeline.

[0060] Further, please refer to Figure 7 , Figure 7 for the flowchart of the air tightness detection method in another embodiment of the present application. As shown in Figure 7 , step S206 further includes step S205:

[0061] Step S205: control the vacuum cut valve 12a and the absolute pressure cut valve 12d to open; wherein the vacuum cut valve 12a is arranged on the pipeline 10 between the vacuum pump 14 and the detection end, and the absolute pressure cut valve 12d is arranged on the pipeline 10 between the absolute vacuum sensor 12e and the detection end.

[0062] In step S205, the vacuum cut valve 12a has an open state and a closed state; in the open state, the vacuum pump 14 is in communication with the pipeline 10, and the gas flow generated under the action of the suction force of the vacuum pump 14 can flow in the pipeline 10; in the closed state, the vacuum pump 14 is disconnected from the pipeline 10, and the gas flow generated under the action of the suction force of the vacuum pump 14 cannot flow in the pipeline 10. The absolute pressure cut valve 12d has an open state and a closed state; in the open state, the absolute pressure cut valve 12d connects the absolute vacuum sensor 12e with the pipeline 10, the gas flow flowing in the pipeline 10 can act on the sensitive element of the absolute vacuum sensor 12e, and the absolute vacuum sensor 12e can measure the third pressure value in the pipeline 10; in the closed state, the absolute pressure cut valve 12d blocks the absolute vacuum sensor 12e from the pipeline 10, and the gas flow flowing in the pipeline 10 cannot act on the sensitive element of the absolute vacuum sensor 12e, and the absolute vacuum sensor 12e cannot measure the third pressure value in the pipeline 10. Control the vacuum cut valve 12a and the absolute pressure cut valve 12d to open, and the pipeline 10 between the vacuum pump 14 and the absolute vacuum sensor 12e is conducted, at this time the absolute vacuum sensor 12e can effectively measure the third pressure value in the pipeline 10. It should be noted that the detection end is connected to the hydraulic brake system 3, when the vacuum pump 14 is opened, the vacuum cut valve 12a is opened, and the absolute pressure cut valve 12d is opened, and no leakage point appears, the third pressure value measured by the absolute vacuum sensor 12e in the pipeline 10 is the pressure value inside the hydraulic brake system 3.

[0063] Further, please refer to Figure 8 , Figure 8 is a flowchart of the air tightness detection method in another embodiment of the present application. As Figure 8 shown, step S104 further includes step S103:

[0064] Step S103: control the air cut valve 13a to close, so as to disconnect the pipeline 10 from the atmosphere.

[0065] In step S103, the specific setting position of the air venting stop valve 13a in the pipeline 10 is not limited here, and the designer can make reasonable design according to actual needs. The air venting stop valve 13a has an open state and a closed state; in the open state, the pipeline 10 is in communication with the atmosphere; in the closed state, the pipeline 10 is disconnected from the atmosphere. By designing the air venting stop valve 13a, before the air tightness detection of the hydraulic brake system 3, the air venting stop valve 13a is controlled to be closed to disconnect the pipeline 10 from the atmosphere, so as to ensure the effectiveness of the detection.

[0066] Further, please refer to Figure 9 , Figure 9 is a flowchart of the air tightness detection method in another embodiment of the present application. As shown in Figure 9 , step S106 further includes step S107:

[0067] Step S107: control the detection mode to be closed, and control the air venting stop valve 13a to be opened to make the pipeline 10 in communication with the atmosphere.

[0068] In step S107, if in the first detection mode, "the detection mode is closed" means that the first detection mode is closed, at this time the air source 2 is controlled to be closed, the air blowing stop valve 11a is controlled to be closed, and the positive pressure stop valve 11b is controlled to be closed; if in the second detection mode, "the detection mode is closed" means that the second detection mode is closed, at this time the vacuum pump 14 is controlled to be closed, the vacuum stop valve 12a is controlled to be closed, and the relative pressure stop valve 12b is controlled to be closed; if in the third detection mode, "the detection mode is closed" means that the third detection mode is closed, at this time the vacuum pump 14 is controlled to be closed, the vacuum stop valve 12a is controlled to be closed, and the absolute pressure stop valve 12d is controlled to be closed. By designing the air venting stop valve 13a, after the air tightness detection of the hydraulic brake system 3 is completed, the air venting stop valve 13a is controlled to be opened to make the pipeline 10 in communication with the atmosphere, and the air pressure in the pipeline 10 is balanced with the atmospheric pressure in time, so as to ensure the safety of the detection.

[0069] Further, please refer to Figure 10 , Figure 10 is a flowchart of the air tightness detection method in another embodiment of the present application. As shown in Figure 10 , step S102 further includes step S101:

[0070] Step S101: seal the detection end of the pipeline 10, and select all detection modes to perform air tightness detection on the pipeline 10 in sequence.

[0071] In step S101, after the detection end of the pipeline 10 is closed, the pipeline 10 is disconnected from the atmosphere; when the detection mode includes the first detection mode, the second detection mode and the third detection mode, the pipeline 10 can be tested for air tightness in the order of the first detection mode-the second detection mode-the third detection mode, or the pipeline 10 can be tested for air tightness in the order of the third detection mode-the second detection mode-the first detection mode. If it is determined that the air tightness test of the pipeline 10 is qualified, the above step S102 can be executed; if it is determined that the air tightness test of the pipeline 10 is unqualified, an early warning prompt will be issued (such as a voice prompt issued by a honeycomb device, a light prompt displayed by an indicator light), and the inspection personnel will take corresponding remedial measures (such as confirming the leakage point and performing repairs) according to the early warning prompt to ensure the accuracy of the air tightness test of the hydraulic brake system 3. Before connecting the hydraulic brake system 3 to the detection end of the pipeline 10 for air tightness detection, by preferentially detecting the air tightness of the pipeline 10 in all detection modes, it is possible to confirm in advance whether the pipeline 10 has any air leakage, thereby ensuring the accuracy of the subsequent air tightness detection of the hydraulic brake system 3.

[0072] It should be noted that when the pipeline 10 is tested for air tightness, the air stop valve 13a also needs to be controlled to be closed to disconnect the pipeline 10 from the atmosphere, thereby ensuring the effectiveness of the air tightness test of the pipeline 10; and after the air tightness test of the pipeline 10 is completed, the air stop valve 13a is controlled to be opened to connect the pipeline 10 to the atmosphere, thereby ensuring the safety of the air tightness test of the pipeline 10.

[0073] Please refer to Figure 11 As shown, Figure 11 FIG2 is a schematic diagram of the structure of an air tightness detection device in an embodiment of the present application. The air tightness detection device 1 can be used for, but is not limited to, performing air tightness detection on a product to be tested, such as a hydraulic brake system 3, which requires air tightness detection.

[0074] like Figure 11 As shown, the air tightness detection device 1 includes a pipeline 10, a mode detection module, and an air tightness determination module. The detection end of the pipeline 10 is used to connect to the hydraulic brake system 3; the mode detection module is connected to the pipeline 10 and is used to select at least two detection modes from multiple detection modes and perform air tightness detection on the hydraulic brake system 3 in a preset order; the air tightness determination module is connected to the mode detection module and is used to determine that the air tightness test of the hydraulic brake system 3 has passed if the absolute value of the actual pressure value in the pipeline 10 measured by the sensor of the mode detection module relative to the fluctuation range of the preset pressure value within a preset time period is less than or equal to the fluctuation threshold.

[0075] The “testing end” is an end of the pipeline 10 used for connecting to the product to be tested in the hydraulic brake system 3 .

[0076] The air tightness detection device 1 is used to perform the air tightness detection method described above, and the plurality of detection modes include different first, second and third detection modes. The air tightness of the hydraulic braking system 3 can be detected in the order of the first, second and third detection modes, or in the order of the third, second and first detection modes. In addition, the different detection modes are independent of each other. For example, when the air tightness of the hydraulic braking system 3 is detected in the order of the first, second and third detection modes, if only the second and third detection modes are selected, the air tightness of the hydraulic braking system 3 is first detected in the second detection mode, and then the air tightness of the hydraulic braking system 3 is detected in the third detection mode after the second detection mode is completed.

[0077] The mode detection module includes a blowing cutoff valve 11a, a positive pressure cutoff valve 11b, a pressure sensor 11c, a vacuum cutoff valve 12a, a relative pressure cutoff valve 12b, a relative vacuum sensor 12c, an absolute pressure cutoff valve 12d, an absolute vacuum sensor 12e, and a breather cutoff valve 13a. The specific arrangement of the valves and sensors on the pipeline 10 is not limited here, and the designer can design reasonably according to actual needs. For example, in the embodiment of the present application, the valves and sensors are arranged on the pipeline as shown in the figure. Figure 11

[0078] The air tightness determination module includes a controller (not shown in the figure). The controller is electrically connected with the blowing cutoff valve 11a, the positive pressure cutoff valve 11b, the vacuum cutoff valve 12a, the relative pressure cutoff valve 12b, the absolute pressure cutoff valve 12d, and the breather cutoff valve 13a, so as to control the opening and closing of the corresponding valves in different detection modes. The controller is also electrically connected with the pressure sensor 11c, the relative vacuum sensor 12c, and the absolute vacuum sensor 12e, so as to convert the corresponding pressure signals into electrical signals in different detection modes.

[0079] The air tightness detection device 1 further includes a vacuum pump 14 and a quick connector 15. The vacuum pump 14 is connected with the pipeline 10 through the quick connector 15. By designing the quick connector 15, the vacuum pump 14 and the pipeline 10 can be quickly installed and quickly disassembled.

[0080] The air tightness detection device 1 further includes a breather valve 13b connected with the breather cutoff valve 13a. The breather valve 13b is used to quickly release the air pressure or vacuum in the pipeline 10 after the air tightness detection is completed, so as to balance the air pressure in the pipeline 10 with the atmospheric pressure.

[0081] ​It should be noted that the gas source 2 is independent of the air tightness detection device 1, and when the air tightness detection device 1 needs to be used to detect the air tightness of the hydraulic brake system 3, the gas source 2 is communicated with the blowing stop valve 11a through the gas pipe.

[0082] In the first detection mode, the blowing stop valve 11a is opened, the positive pressure stop valve 11b is opened, the gas source 2 is started, the gas source 2 transports the gas into the pipeline 10 according to the predetermined pressure, and the pressure sensor 11c measures the first pressure value in the pipeline 10.

[0083] In the second detection mode, the vacuum stop valve 12a is opened, the relative pressure stop valve 12b is opened, the vacuum pump 14 is started, the vacuum pump 14 extracts the gas in the pipeline 10 according to the first predetermined vacuum, and the relative vacuum sensor 12c measures the second pressure value in the pipeline 10.

[0084] In the third detection mode, the vacuum stop valve 12a is opened, the absolute pressure stop valve 12d is opened, the vacuum pump 14 is started, the vacuum pump 14 extracts the gas in the pipeline 10 according to the second predetermined vacuum, and the absolute vacuum sensor 12e measures the third pressure value in the pipeline 10.

[0085] Based on the air tightness detection device 1 in the embodiment of the present application, the air tightness of the hydraulic brake system 3 is detected by selecting at least two detection modes in the plurality of detection modes, and the change of the gas pressure in the pipeline 10 in the two or more detection modes is measured by designing the preset time length, the preset pressure value and the fluctuation threshold value, and the gas pressure in the pipeline 10 can be determined to be qualified only when the air tightness of the hydraulic brake system 3 meets the predetermined conditions in the two or more detection modes, so that the accuracy of the air tightness detection can be effectively improved.

[0086] Please refer to Figure 12 , which is a structural schematic diagram of the electronic device in an embodiment of the present application. As Figure 12 shown, the electronic device can include a processor 41, a communication interface 42, a memory 43 and a communication bus 44, and the processor 41, the communication interface 42 and the memory 43 complete communication with each other through the communication bus 44. Figure 12

[0087] Among them, the processor 41 can call the computer program in the memory 43 to execute the steps of the above-mentioned air tightness detection method, for example, including:

[0088] Step S102: connecting the hydraulic brake system 3 to the detection end of the pipeline 10;

[0089] ​Step S104: select at least two detection modes among the plurality of detection modes and perform the air tightness detection on the hydraulic braking system 3 in a preset order;

[0090] Step S106: if the absolute value of the fluctuation range of the actual pressure value measured by the sensor relative to the preset pressure value in the preset time period is less than or equal to the fluctuation threshold, it is determined that the air tightness detection of the hydraulic braking system 3 is qualified.

[0091] The logic instructions in the memory 43 described above can be realized in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the method described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory 43 (ROM, Read Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0092] On the other hand, the embodiments of the present application also provide a computer program product, which includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the steps of the air tightness detection method provided by the above-mentioned embodiments, for example, including:

[0093] Step S102: connect the hydraulic braking system 3 to the detection end of the pipeline 10;

[0094] Step S104: select at least two detection modes among the plurality of detection modes and perform the air tightness detection on the hydraulic braking system 3 in a preset order;

[0095] Step S106: if the absolute value of the fluctuation range of the actual pressure value measured by the sensor relative to the preset pressure value in the preset time period is less than or equal to the fluctuation threshold, it is determined that the air tightness detection of the hydraulic braking system 3 is qualified.

[0096] On the other hand, the embodiments of the present application also provide a processor readable storage medium, which stores a computer program, and the computer program is used to make the processor execute the steps of the method provided by the above-mentioned embodiments, for example, including:

[0097] Step S102: connect the hydraulic braking system 3 to the detection end of the pipeline 10;

[0098] Step S104: select at least two detection modes among the plurality of detection modes and sequentially perform the air tightness detection on the hydraulic braking system 3 according to a preset order;

[0099] Step S106: if the absolute value of the fluctuation range of the actual pressure value measured by the sensor in the pipeline 10 relative to the preset pressure value is less than or equal to the fluctuation threshold within a preset time length, it is determined that the air tightness detection of the hydraulic braking system 3 is qualified.

[0100] The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to a magnetic memory (such as a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk (MO), etc.), an optical memory (such as a CD, a DVD, a BD, a HVD, etc.), and a semiconductor memory (such as a ROM, an EPROM, an EEPROM, a non-volatile memory (NAND FLASH), a solid state disk (SSD)), etc.

[0101] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art can understand and implement without creative labor.

[0102] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of software products, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and include a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.

[0103] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0104] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for detecting air tightness, characterized in that: For performing air tightness testing on a hydraulic brake system, the method comprises: Connect the hydraulic brake system to the detection end of the pipeline; Select at least two detection modes from a plurality of detection modes and perform air tightness detection on the hydraulic brake system in sequence according to a preset order; If within a preset time period, the absolute value of the fluctuation range of the actual pressure value in the pipeline measured by the sensor relative to the preset pressure value is less than or equal to the fluctuation threshold, it is determined that the air tightness test of the hydraulic brake system is qualified.

2. The airtightness detection method according to claim 1, wherein: The multiple detection modes include a first detection mode and a second detection mode; selecting at least two detection modes from the multiple detection modes and performing air tightness detection on the hydraulic brake system in sequence according to a preset order includes: If the first detection mode is selected, the gas source is controlled to deliver gas into the pipeline at a predetermined pressure, and the pressure sensor is controlled to measure a first pressure value in the pipeline; wherein the sensor includes the pressure sensor, and the actual pressure value includes the first pressure value; If the second detection mode is selected, the vacuum pump on the pipeline is controlled to extract the gas in the pipeline according to the first predetermined vacuum, and the relative vacuum sensor is controlled to measure the second pressure value in the pipeline; wherein, the sensor also includes the relative vacuum sensor, and the actual pressure value also includes the second pressure value.

3. The airtightness detection method according to claim 2, wherein: If the first detection mode is selected, before controlling the gas source to deliver gas to the pipeline at a predetermined pressure and controlling the pressure sensor to measure a first pressure value in the pipeline, the method includes: Control the opening of the air blowing stop valve and the positive pressure stop valve; wherein the air blowing stop valve is arranged on the pipeline between the air source and the detection end, and the positive pressure stop valve is arranged on the pipeline between the pressure sensor and the detection end; and / or If the second detection mode is selected, the vacuum pump on the pipeline is controlled to extract the gas in the pipeline according to the first predetermined vacuum, and the relative vacuum sensor is controlled to measure the second pressure value in the pipeline, including: Control the vacuum shut-off valve and the relative pressure shut-off valve to open; wherein, the vacuum shut-off valve is arranged on the pipeline between the vacuum pump and the detection end, and the relative pressure shut-off valve is arranged on the pipeline between the relative vacuum sensor and the detection end.

4. The airtightness detection method according to claim 2, wherein: If, within a preset time period, the absolute value of the fluctuation range of the actual pressure value in the pipeline measured by the sensor relative to the preset pressure value is less than or equal to the fluctuation threshold, then determining that the air tightness test of the hydraulic brake system is qualified includes: If the first detection mode is selected, and within a first preset time period, the absolute value of the fluctuation range of the first pressure value in the pipeline measured by the pressure sensor relative to the first preset pressure value is less than or equal to a first fluctuation threshold, then it is determined that the air tightness test of the hydraulic brake system has passed; wherein the preset time period includes the first preset time period, the preset pressure value includes the first preset pressure value, and the fluctuation threshold includes the first fluctuation threshold; If the second detection mode is selected, within a second preset time period, the absolute value of the fluctuation range of the second pressure value in the pipeline measured by the relative vacuum sensor relative to the second preset pressure value is less than or equal to a second fluctuation threshold, then it is determined that the air tightness test of the hydraulic brake system is qualified; wherein, the preset time period also includes the second preset time period, the preset pressure value also includes the second preset pressure value, and the fluctuation threshold also includes the second fluctuation threshold.

5. The airtightness detection method according to claim 2, wherein: The multiple detection modes further include a third detection mode; and the step of selecting at least two detection modes from the multiple detection modes and performing air tightness detection on the hydraulic brake system in a preset order further includes: If the third detection mode is selected, the vacuum pump on the pipeline is controlled to extract the gas in the pipeline according to the second predetermined vacuum, and the absolute vacuum sensor is controlled to measure the third pressure value in the pipeline; wherein, the sensor also includes the absolute vacuum sensor, and the actual pressure value also includes the third pressure value.

6. The airtightness detection method according to claim 5, characterized in that: If the absolute value of the fluctuation range of the actual pressure value in the pipeline measured by the sensor relative to the preset pressure value within the preset time period is less than or equal to the fluctuation threshold, then it is determined that the air tightness test of the hydraulic brake system is qualified, and further includes: If the third detection mode is selected, within a third preset time period, the absolute value of the fluctuation range of the third pressure value in the pipeline measured by the absolute vacuum sensor relative to the third preset pressure value is less than or equal to a third fluctuation threshold, then it is determined that the air tightness test of the hydraulic brake system is qualified; wherein, the preset time period also includes the third preset time period, the preset pressure value also includes the third preset pressure value, and the fluctuation threshold also includes the third fluctuation threshold.

7. The airtightness detection method according to claim 5, wherein: If the third detection mode is selected, before controlling the vacuum pump on the pipeline to extract the gas in the pipeline according to the second predetermined vacuum and controlling the absolute vacuum sensor to measure the third pressure value in the pipeline, the method includes: Control the vacuum shut-off valve and the absolute pressure shut-off valve to open; wherein, the vacuum shut-off valve is arranged on the pipeline between the vacuum pump and the detection end, and the absolute pressure shut-off valve is arranged on the pipeline between the absolute vacuum sensor and the detection end.

8. The airtightness detection method according to claim 1, wherein: Before selecting at least two detection modes from the plurality of detection modes and performing air tightness detection on the hydraulic brake system in sequence according to a preset order, the method includes: The vent stop valve is controlled to be closed to disconnect the pipeline from the atmosphere.

9. The airtightness detection method according to claim 8, characterized in that: If, within a preset time period, the absolute value of the fluctuation range of the actual pressure value in the pipeline measured by the sensor relative to the preset pressure value is less than or equal to the fluctuation threshold, then it is determined that the air tightness test of the hydraulic brake system is qualified, the method further includes: The detection mode is controlled to be closed, and the vent cut-off valve is controlled to be opened so that the pipeline is connected to the atmosphere.

10. An airtightness detection device, characterized in that: Used for testing the air tightness of a hydraulic brake system, the device comprises: a pipeline, wherein a detection end of the pipeline is used for connecting to the hydraulic brake system; a mode detection module, connected to the pipeline, for selecting at least two detection modes from a plurality of detection modes and performing air tightness detection on the hydraulic brake system in sequence according to a preset order; An air tightness determination module is connected to the mode detection module and is used to determine that the air tightness test of the hydraulic brake system is qualified if, within a preset time period, the absolute value of the fluctuation range of the actual pressure value in the pipeline measured by the sensor of the mode detection module relative to the preset pressure value is less than or equal to a fluctuation threshold.

11. An electronic device, characterized in that: The device comprises a processor and a memory storing a computer program, wherein when the processor executes the computer program, the steps of the airtightness detection method according to any one of claims 1 to 9 are implemented.

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