A leak detection platform for hydrogenation equipment and a leak detection method thereof

Abstract

The present invention discloses a leak detection platform for hydrogenation equipment, comprising: a vacuum chamber, having a mounting hole through the bottom, one end of the mounting hole is suitable for connection with the hydrogenation equipment, and the other end is connected with the vacuum equipment; a boosting system, comprising a helium source, a compressor and a boosting pump, the helium source, the compressor and the boosting pump are connected in sequence, and the end of the boosting pipeline is suitable for connection with the hydrogenation equipment; a helium leak detection system, comprising a suction gun, a mechanical pump, a first helium mass spectrometry detection module and a second helium mass spectrometry detection module connected in sequence, the suction gun, the first helium mass spectrometry detection module and the second helium mass spectrometry detection module are arranged in the vacuum chamber, and the mechanical pump is located outside the vacuum chamber; an actuator, fixedly connected to the upper part of the vacuum chamber, the actuator is connected with a suction gun, and the actuator is suitable for controlling the motion trajectory of the suction gun. The present invention also provides a leak detection method, which has strong operability, high safety and effectiveness, and improves the accuracy and reliability of hydrogenation equipment when leak detection is carried out.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen leak detection in hydrogen refueling stations, and in particular to a leak detection platform for hydrogen refueling equipment and a leak detection method thereof. Background Art

[0002] Sealing performance is one of the most important testing indicators for hydrogen refueling station equipment, which is directly related to the safety and reliability of the entire hydrogen refueling station.

[0003] In the existing technology, the sealing performance test of hydrogen refueling station equipment before leaving the factory mostly relies on the "soap bubble method" for testing, that is, applying leak detection liquid to the potential leak points of the equipment. When a leak occurs, the "bubble" generated by the leak detection liquid can be observed to qualitatively determine whether the equipment has a leak. In addition, the "soap bubble method" requires manual application of leak detection liquid to the equipment, which not only easily misses some leak points, but also the amount of leak detection liquid applied can easily affect the accuracy of the final test. For hydrogen refueling equipment that enters the mass production stage, the method of manually applying leak detection liquid and observing "soap bubbles" to judge the sealing of the equipment has problems in terms of operability, as well as safety and effectiveness. Summary of the invention

[0004] The object of the present invention is to provide a leak detection platform for hydrogenation equipment and a leak detection method thereof, so as to solve the technical problems of poor operability, safety and effectiveness of the existing detection methods in the background technology.

[0005] In order to solve the above problems, the present invention provides a leak detection platform for hydrogenation equipment, comprising:

[0006] A vacuum chamber having a mounting hole extending through the bottom, one end of the mounting hole being suitable for connection with a hydrogenation device located in the vacuum chamber, and the other end being suitable for connection with a vacuum device through a vacuum pipeline, and the vacuum device being used for vacuuming the vacuum chamber;

[0007] A pressurizing system, comprising a helium source, a compressor and a booster pump, wherein the helium source, the compressor and the booster pump are sequentially connected via a booster pipeline, the end of the booster pipeline is arranged inside the vacuum chamber and is suitable for being connected to the hydrogenation equipment to pressurize the hydrogenation equipment to a rated working pressure;

[0008] A helium leak detection system, comprising a suction gun, a mechanical pump, a first helium mass spectrometry detection module and a second helium mass spectrometry detection module connected in sequence by a hose, wherein the suction gun, the first helium mass spectrometry detection module and the second helium mass spectrometry detection module are arranged in the vacuum chamber, and the mechanical pump is located outside the vacuum chamber;

[0009] An actuator is fixedly connected to the upper part of the vacuum chamber. The actuator is provided with a sealing cover suitable for covering the top of the vacuum chamber so that the vacuum chamber forms a vacuum-sealed space. The actuator is also connected to a suction gun, and the actuator is suitable for controlling the movement trajectory of the suction gun in the vacuum chamber.

[0010] Preferably, it also includes a movable support frame, which includes a square support beam assembly and locking rollers and a support adjustment disk fixedly connected to the four corners of the square support beam assembly.

[0011] Preferably, the actuator includes a vertical sliding assembly fixed to the rear side of the vacuum chamber and an angle rotation assembly slidably connected to the vertical sliding assembly, the angle rotation assembly is equipped with the suction gun, and the suction gun is suitable for rotating on the periphery of the hydrogenation equipment to detect leakage of the hydrogenation equipment.

[0012] Preferably, the vertical sliding assembly includes a driving component, a vertical guide slide, a transverse guide plate, a vertical screw and a limit seat fixed at both ends of the vertical screw, the limit seat is fixed on the upper and lower sides of the vertical guide slide, the vertical guide slide is provided with two parallel vertical long grooves, one side of the transverse guide plate is slidably passed through the vertical screw, and the other side passes through the vertical long groove and is connected to the angle rotation assembly.

[0013] Preferably, the driving component includes a vertical motor, a driving gear connected to the output shaft of the vertical motor, a driven gear connected to the bottom end of the vertical screw, and a conveyor belt connected around the driving gear and the driven gear. The vertical motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate under the meshing action of the conveyor belt. The rotation of the driven gear drives the vertical screw to rotate, thereby driving the vertical guide slide to move up and down.

[0014] Preferably, the angle rotation assembly includes a connecting plate fixedly connected to one side of the lateral guide plate, a rotating motor installed on the connecting plate and close to the lateral guide plate, a first transmission wheel fixedly connected to the output shaft of the rotating motor, a second transmission wheel fixedly connected to the other side of the connecting plate and a guide plate rotatably connected between the two connecting plates, the rotating motor drives the first transmission wheel to rotate, the first transmission wheel drives the second transmission wheel to rotate under the action of a belt, and the second transmission wheel drives the guide plate to perform a yaw motion.

[0015] Preferably, a plurality of suction guns are provided, and the plurality of suction guns are respectively located at the corners of the vacuum chamber and near the bypass of the main suction pump.

[0016] Preferably, it further comprises a control cabinet and an audible and visual display alarm device, wherein the control cabinet is electrically connected to the pressurization system, the helium leak detection system, the actuator and the audible and visual display alarm device.

[0017] Preferably, an operation button is also provided directly in front of the vacuum chamber, and the operation button is electrically connected to the control cabinet.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The vacuum chamber provides a relatively stable external environment for leak detection of hydrogenation equipment, which can avoid the interference of environmental factors during the leak detection process and cause deviation in the test results, thereby improving the accuracy and reliability of leak detection of hydrogenation equipment;

[0020] 2. It can avoid the risks and safety hazards caused by personnel conducting pressure leak detection when the equipment status is unknown. Compared with the manual measurement method, the program controls the multiple helium mass spectrometer detection modules inside the leak detection platform to perform automatic measurement, thereby improving the efficiency of leak detection.

[0021] The present invention also provides a leak detection method for a leak detection platform for hydrogenation equipment, characterized in that the leak detection method specifically comprises the following steps:

[0022] S1: Use a mechanical pump to evacuate the vacuum pipeline and the vacuum chamber at room temperature until the required vacuum degree is reached;

[0023] S2: Start the pressurization system, fill helium into the hydrogenation equipment to be tested, pressurize the equipment to a set working pressure, open the valve of the first helium mass spectrometry detection module, observe the reading of the first helium mass spectrometry detection module to detect the external leakage rate of the main path, if no helium leakage occurs, the hydrogenation equipment passes the leak detection, if leakage occurs, start the valve of the second helium mass spectrometry detection module, observe the reading of the second helium mass spectrometry detection module to detect the external leakage rate of the sub-region;

[0024] S3: The actuator controls the driving of the suction gun according to the set program to search for leaks in different areas along the set trajectory;

[0025] S4: If leakage occurs, locate the specific area where the hydrogenation equipment leaks; if no leakage occurs, the helium leak detection meets the requirements and the equipment is qualified.

[0026] The advantages of the leak detection method over the prior art are the same as those of the leak detection platform for hydrogenation equipment described above, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a leak detection platform for hydrogenation equipment in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the main structure of a leak detection platform for hydrogenation equipment in an embodiment of the present invention;

[0029] Figure 3 It is a side structural schematic diagram of a leak detection platform for hydrogenation equipment in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a leak detection platform for hydrogenation equipment in an embodiment of the present invention from a bottom view;

[0031] Figure 5 It is a structural schematic diagram of one direction of the actuator in an embodiment of the present invention;

[0032] Figure 6 It is a structural schematic diagram of another direction of the actuator in an embodiment of the present invention;

[0033] Figure 7 It is a schematic flow chart of a leak detection method for a leak detection platform for hydrogenation equipment in an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1-vacuum chamber; 11-mounting hole; 2-boosting system; 21-helium source; 22-compressor; 23-boosting pump; 3-helium leak detection system; 4-actuator; 41-vertical sliding assembly; 411-driving component; 4111-vertical motor; 4112-driving gear; 4113-driven gear; 4114-conveyor belt; 412-vertical guide slide; 4121-vertical long groove; 413-lateral guide plate; 414-vertical lead screw; 415-limiting seat; 42-angle rotation assembly; 421-connecting plate; 422-rotating motor; 423-first transmission wheel; 424-second transmission wheel; 425-guide plate; 5-movable support frame; 51-square support beam assembly; 52-locking roller; 53-support adjustment disk; 6-control cabinet; 7-sound and light display alarm device; 8-operation button. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0037] In the description of the present invention, it should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figure 1-6 As shown, an embodiment of the present invention provides a leak detection platform for hydrogenation equipment, and the leak detection platform for hydrogenation equipment includes:

[0040] The vacuum chamber 1 has a mounting hole 11 which passes through the bottom. One end of the mounting hole 11 is suitable for connecting with the hydrogenation equipment located in the vacuum chamber 1, and the other end is suitable for connecting with the vacuum equipment through a vacuum pipeline. The vacuum equipment is used to evacuate the vacuum chamber 1.

[0041] A pressurizing system 2, comprising a helium source 21, a compressor 22 and a boosting pump 23, wherein the helium source 21, the compressor 22 and the boosting pump 23 are sequentially connected via a boosting pipeline, wherein the end of the boosting pipeline is arranged inside the vacuum chamber 1 and is suitable for being connected to a hydrogenation device to pressurize the hydrogenation device to a rated working pressure; a helium leak detection system 3, comprising a suction gun, a mechanical pump, a first helium mass spectrometry detection module and a second helium mass spectrometry detection module sequentially connected via a hose, wherein the suction gun, the first helium mass spectrometry detection module and the second helium mass spectrometry detection module are arranged inside the vacuum chamber 1, and the mechanical pump is located outside the vacuum chamber 1;

[0042] The actuator 4 is fixedly connected to the upper part of the vacuum chamber 1. The actuator 4 is provided with a sealing cover suitable for covering the top of the vacuum chamber 1 so that the vacuum chamber 1 forms a vacuum-tight space. The actuator 4 is also connected to a suction gun, and the actuator 4 is suitable for controlling the movement trajectory of the suction gun in the vacuum chamber 1.

[0043] Therefore, in the embodiment of the present invention, a relatively stable external environment is provided for leak detection of the hydrogenation equipment by setting up the vacuum chamber 1, which can avoid the deviation of the detection result caused by the interference of environmental factors during the leak detection process, and improve the accuracy and reliability of the hydrogenation equipment during the field leak detection; compared with the manual measurement method, the helium leak detection system 3 inside the leak detection platform is automatically measured by program control, thereby improving the efficiency of leak detection.

[0044] Specifically, see Figure 1As shown, in the embodiment of the present invention, the leak detection platform for hydrogenation equipment also includes a mobile support frame 5, which includes a square support beam assembly 51 and locking rollers 52 and a support adjustment disk 53 fixedly connected to the four corners of the square support beam assembly 51.

[0045] Therefore, the vacuum chamber is supported by the movable support frame 5, and the structure of the movable support frame 5 is stable and reliable, achieving the required structural strength; the locking rollers 52 are arranged at the four corners of the square support beam assembly 51, and when it is necessary to move, the locking rollers 52 can be opened to push the leak detection platform for the hydrogenation equipment to the required position, and when it is necessary to fix, the locking rollers 52 can be closed to fix the leak detection platform for the hydrogenation equipment at the required position; the support adjustment disk 53 can be used to adjust the height of the platform for the convenience of the operator.

[0046] Specifically, see Figure 1 , 2 As shown in Figures 4 and 5, in the embodiment of the present invention, the actuator 4 includes a vertical sliding assembly 41 fixed to the rear side of the vacuum chamber 1 and an angle rotation assembly 42 slidably connected to the vertical sliding assembly 41. The angle rotation assembly 42 is equipped with a suction gun and is suitable for rotating on the periphery of the hydrogenation equipment to detect leakage of the hydrogenation equipment.

[0047] Therefore, through the automated operation of the equipment, other personal safety accidents such as loose joints and flying pipes during the pressurization process of the hydrogenation equipment under test can be avoided. During the pressurization process of the equipment, personnel can be prevented from performing any operation on the equipment being pressurized, including leak detection.

[0048] Specifically, see Figure 1 , 2 As shown in Figures 4 and 5, in an embodiment of the present invention, the vertical sliding assembly 41 includes a driving component 411, a vertical guide slide 412, a transverse guide plate 413, a vertical lead screw 414 and a limit seat 415 fixed at both ends of the vertical lead screw 414, the limit seat 415 is fixed on the upper and lower sides of the vertical guide slide 412, the vertical guide slide 412 is provided with two parallel vertical long grooves 4121, one side of the transverse guide plate 413 is slidably penetrated on the vertical lead screw 414, when the vertical lead screw 414 rotates, the transverse guide plate 413 is suitable for moving up and down along the vertical lead screw 414, and the other side of the transverse guide plate 413 passes through the vertical long groove 4121 and is connected to the angle rotation assembly 42.

[0049] Therefore, the driving component 411 is suitable for driving the vertical screw 414 to rotate. When the vertical screw 414 rotates, it drives the transverse guide plate 413 on the vertical screw 414 to move up and down, thereby driving the angle rotation component 42 to move.

[0050] Specifically, see Figure 4 , 5 As shown, in the embodiment of the present invention, the driving component 411 includes a vertical motor 4111, a driving gear 4112 connected to the output shaft of the vertical motor 4111, a driven gear 4113 connected to the bottom end of the vertical lead screw 414, and a conveyor belt 4114 wrapped around the driving gear 4112 and the driven gear 4113. The vertical motor 4111 drives the driving gear 4112 to rotate, and the driving gear 4112 drives the driven gear 4113 to rotate under the meshing action of the conveyor belt 4114. The rotation of the driven gear 4113 drives the vertical lead screw 414 to rotate, thereby driving the vertical guide slide 412 to move up and down.

[0051] Specifically, see Figure 4 , 5 As shown, in the embodiment of the present invention, the angle rotation assembly 42 includes a connecting plate 421 fixedly connected to one side of the transverse guide plate 413, a rotating motor 422 installed on the connecting plate 421 and close to the transverse guide plate 413, a first transmission wheel 423 fixedly connected to the output shaft of the rotating motor 422, a second transmission wheel 424 fixedly connected to the other side of the connecting plate 421 and a guide plate 425 rotatably connected between the two connecting plates 421, the rotating motor 422 drives the first transmission wheel 423 to rotate, the first transmission wheel 423 drives the second transmission wheel 424 to rotate under the action of the belt, and the second transmission wheel 424 drives the guide plate 425 to perform a yaw motion.

[0052] Specifically, in the embodiment of the present invention, a plurality of suction guns are provided, and the plurality of suction guns are respectively located at the corners of the vacuum chamber 1 and near the bypass of the main suction pump.

[0053] In this embodiment, in addition to setting up a suction gun type helium leak detection system in the bypass of the main suction pump of the vacuum chamber 1, a suction gun type helium leak detection suction gun is also set near the 8 vertices of the rectangular working room of the vacuum chamber 1 of the leak detection platform, and each suction gun can be connected to the mechanical pump and helium mass spectrometry detection module of the helium leak detection system through a low-pressure hose.

[0054] Specifically, see Figure 1 As shown, in the embodiment of the present invention, a control cabinet 6 and an audible and visual display alarm device 7 are also included. The control cabinet 6 is electrically connected to the pressurization system 2, the helium leak detection system 3, the actuator 4 and the audible and visual display alarm device 7.

[0055] Specifically, see Figure 1 As shown, in the embodiment of the present invention, an operation button 8 is further provided in front of the vacuum chamber 1 , and the operation button 8 is electrically connected to the control cabinet 6 .

[0056] Therefore, the traditional test method can only detect after the equipment is pressurized to the set pressure, while the leak detection platform in this embodiment can monitor the leakage rate of the hydrogenation equipment to be tested in real time during the entire test cycle. If a leak occurs at any pressure level during the test period, the alarm system of the leak detection platform will be triggered and an alarm sound will be issued. This is equivalent to setting an infinite number of constant pressure leakage test points for the hydrogenation equipment to be tested, effectively avoiding the problem of equipment leakage not being detected when the equipment leak occurs between two set pressure values ​​to be tested according to the traditional test method, thereby improving the detection rate of equipment leakage and factory quality.

[0057] See also Figure 7 As shown, the present invention also provides a leak detection method for a leak detection platform for hydrogenation equipment, and the leak detection method specifically comprises the following steps:

[0058] S1: evacuate the vacuum pipeline and the vacuum chamber 1 using a mechanical pump at room temperature until the required vacuum degree is reached;

[0059] S2: Start the pressurizing system 2, fill helium into the hydrogenation equipment to be tested, pressurize the equipment to a set working pressure, open the valve of the first helium mass spectrometer detection module, observe the reading of the first helium mass spectrometer detection module to detect the external leakage rate of the main path, if no helium leakage occurs, the hydrogenation equipment passes the leak detection; if leakage occurs, start the valve of the second helium mass spectrometer detection module, observe the reading of the second helium mass spectrometer detection module to detect the external leakage rate of the sub-region;

[0060] S3: The actuator 4 controls and drives the suction gun to search for leaks in different areas along the set trajectory according to the set program;

[0061] S4: If leakage occurs, locate the specific area where the hydrogenation equipment leaks; if no leakage occurs, the helium leak detection meets the requirements and the equipment is qualified.

[0062] The advantages of the leak detection method over the prior art are the same as those of the leak detection platform for hydrogenation equipment described above, and will not be described in detail here.

[0063] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A leak detection platform for hydrogenation equipment, characterized in that: include: A vacuum chamber having a mounting hole extending through the bottom, one end of the mounting hole being suitable for connection with a hydrogenation device located in the vacuum chamber, and the other end being suitable for connection with a vacuum device through a vacuum pipeline, and the vacuum device being used for vacuuming the vacuum chamber; A pressurizing system, comprising a helium source, a compressor and a booster pump, wherein the helium source, the compressor and the booster pump are sequentially connected via a booster pipeline, the end of the booster pipeline is arranged inside the vacuum chamber and is suitable for being connected to the hydrogenation equipment to pressurize the hydrogenation equipment to a rated working pressure; A helium leak detection system, comprising a suction gun, a mechanical pump, a first helium mass spectrometry detection module and a second helium mass spectrometry detection module connected in sequence by a hose, wherein the suction gun, the first helium mass spectrometry detection module and the second helium mass spectrometry detection module are arranged in the vacuum chamber, and the mechanical pump is located outside the vacuum chamber; An actuator is fixedly connected to the upper part of the vacuum chamber, the actuator is provided with a sealing cover suitable for covering the top of the vacuum chamber so that the vacuum chamber forms a vacuum-tight space, and the actuator is also connected to a suction gun, and the actuator is suitable for controlling the movement trajectory of the suction gun in the vacuum chamber; The actuator comprises a vertical sliding assembly fixed to the rear side of the vacuum chamber and an angle rotating assembly slidably connected to the vertical sliding assembly, the angle rotating assembly is provided with the suction gun, and the suction gun is suitable for rotating at the periphery of the hydrogenation equipment to detect leakage of the hydrogenation equipment; The vertical sliding assembly includes a driving component, a vertical guide slide, a transverse guide plate, a vertical lead screw and a limit seat fixed at both ends of the vertical lead screw, the limit seat is fixed to the upper and lower sides of the vertical guide slide, the vertical guide slide is provided with two parallel vertical long grooves, one side of the transverse guide plate is slidably penetrated on the vertical lead screw, and the other side passes through the vertical long groove and is connected to the angle rotation assembly; The driving component includes a vertical motor, a driving gear connected to the output shaft of the vertical motor, a driven gear connected to the bottom end of the vertical lead screw, and a conveyor belt connected around the driving gear and the driven gear. The vertical motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate under the meshing action of the conveyor belt. The rotation of the driven gear drives the vertical lead screw to rotate, thereby driving the vertical guide slide to move up and down; The angle rotation assembly includes a connecting plate fixedly connected to one side of the transverse guide plate, a rotating motor installed on the connecting plate and close to the transverse guide plate, a first transmission wheel fixedly connected to the output shaft of the rotating motor, a second transmission wheel fixedly connected to the other side of the connecting plate and a guide plate rotatably connected between the two connecting plates, the rotating motor drives the first transmission wheel to rotate, the first transmission wheel drives the second transmission wheel to rotate under the action of a belt, and the second transmission wheel drives the guide plate to perform a yaw motion.

2. The leak detection platform for hydrogenation equipment according to claim 1, characterized in that: It also includes a movable support frame, which includes a square support beam assembly and locking rollers and a support adjustment disk fixedly connected to the four corners of the square support beam assembly.

3. The leak detection platform for hydrogenation equipment according to claim 1, characterized in that: A plurality of suction guns are provided, and the plurality of suction guns are respectively located at the corners of the vacuum chamber and near the bypass of the main suction pump.

4. The leak detection platform for hydrogenation equipment according to claim 1, characterized in that: It also includes a control cabinet and an audible and visual display alarm device, wherein the control cabinet is electrically connected to the pressurization system, the helium leak detection system, the actuator and the audible and visual display alarm device.

5. The leak detection platform for hydrogenation equipment according to claim 4, characterized in that: An operation button is also arranged directly in front of the vacuum chamber, and the operation button is electrically connected to the control cabinet.

6. A leak detection method for a leak detection platform for hydrogenation equipment, based on the leak detection platform for hydrogenation equipment according to any one of claims 1 to 5, characterized in that: The leak detection method specifically comprises the following steps: S1: Use a mechanical pump to evacuate the vacuum pipeline and the vacuum chamber at room temperature until the required vacuum degree is reached; S2: Start the pressurization system, fill helium into the hydrogenation equipment to be tested, pressurize the equipment to a set working pressure, open the valve of the first helium mass spectrometry detection module, observe the reading of the first helium mass spectrometry detection module to detect the external leakage rate of the main path, if no helium leakage occurs, the hydrogenation equipment passes the leak detection, if leakage occurs, start the valve of the second helium mass spectrometry detection module, observe the reading of the second helium mass spectrometry detection module to detect the external leakage rate of the sub-region; S3: The actuator controls the driving of the suction gun according to the set program to search for leaks in different areas along the set trajectory; S4: If leakage occurs, locate the specific area where the hydrogenation equipment leaks; if no leakage occurs, the helium leak detection meets the requirements and the equipment is qualified.

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