Pendulum test device

Abstract

The application provides a pendulum test device, comprising a base, a pendulum wire and a locking unit, the base has a first surface upward along the direction of gravity, the first surface is concave to form a swing track, the length direction of the swing track extends along the horizontal direction, the base has a mounting portion, the mounting portion is arranged above the first surface along the direction of gravity; the fixed end of the pendulum wire is connected with the mounting portion, the free end of the pendulum wire can swing along the length direction of the swing track; the locking unit is connected with the base, each swing track is provided with the locking unit, the pendulum wire can be connected with any locking unit to make the pendulum wire form an angle with the direction of gravity and keep still, and the locking unit can also release the pendulum wire to make the pendulum wire swing in the swing track. After the locking unit releases the pendulum wire, the pendulum wire can only swing under the action of its own gravity, the introduction of artificial error can be reduced, and the accuracy of the test result is further improved.

Description

Technical Field

[0001] This application belongs to the field of testing, and more specifically, relates to a pendulum testing device. Background Technology

[0002] In the safety monitoring system of a nuclear power plant, the Enclosure Auxiliary System (EAU) undertakes the core task of detecting containment deformation. Currently, the pendulum test is an important means of testing the accuracy of the EAU system. The pendulum test involves allowing the pendulum to swing freely in multiple directions, collecting data such as the swing path and period from different azimuths, thus enabling a comprehensive assessment of the EAU system's accuracy. During the test, the operator typically needs to manually hold the pendulum, pull it to a suitable swing angle, and then release it to allow the pendulum to swing.

[0003] However, since manual operation is difficult to maintain consistency in terms of force and angle control, it is easy to introduce errors, which affects the accuracy of the test results. Utility Model Content

[0004] The purpose of this application is to provide a pendulum testing device to reduce the introduction of human error and improve the accuracy of pendulum test results.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A pendulum testing apparatus is provided, comprising:

[0007] The base has a first surface that faces upward along the direction of gravity, the first surface is recessed to form a swing path, the length direction of the swing path extends horizontally, and the base has a mounting part that is disposed above the first surface along the direction of gravity.

[0008] A cycloid, wherein the fixed end of the cycloid is connected to the mounting portion, and the free end of the cycloid can swing along the length direction of the cycloid track; and

[0009] A wire locking unit is connected to the base, and the wire locking unit is provided in the swing channel;

[0010] The locking wire unit can clamp the pendulum so that the pendulum is at an angle to the direction of gravity and remains stationary; the locking wire unit can also release the pendulum so that the pendulum swings within the pendulum path.

[0011] In some embodiments, the locking unit includes a clamping member connected to the base and a driving assembly. The clamping member includes a first clamping portion and a second clamping portion movably connected to the first clamping portion. The driving assembly is connected to at least one of the first clamping portion and the second clamping portion and is used to drive the first clamping portion and the second clamping portion to move closer or further away from each other to clamp or release the cycloidal line.

[0012] In some embodiments, the driving assembly includes a first magnetic element connected to the first clamping portion and a second magnetic element connected to the second clamping portion. At least one of the first magnetic element and the second magnetic element is an electromagnet. When the electromagnet is energized, the first magnetic element and the second magnetic element attract or repel each other, thereby driving the first clamping portion and the second clamping portion to move closer or further apart.

[0013] In some embodiments, the drive assembly further includes an elastic element connected between the first clamping portion and the second clamping portion;

[0014] When the magnetic force between the first magnetic component and the second magnetic component disappears, the elastic force of the elastic component can drive the first clamping part and the second clamping part to separate or abut against each other.

[0015] In some embodiments, the clamping member includes a first clamping plate and a second clamping plate, the first clamping plate being connected to the base and rotatably connected to the second clamping plate, the first clamping portion being disposed at one end of the first clamping plate and the second clamping portion being disposed at one end of the second clamping plate, and the driving assembly being connected to at least one of the first clamping plate and the second clamping plate.

[0016] In some embodiments, the pendulum testing device further includes a detection unit connected to the base, and each of the pendulum tracks is provided with the detection unit, which is used to detect the oscillation period information of the free end of the pendulum string when it oscillates in the corresponding pendulum track.

[0017] In some embodiments, the locking unit further includes a mounting bracket connected to the base, and the detection unit is mounted on the mounting bracket.

[0018] In some embodiments, multiple swing tracks are provided, and the extension directions of any two swing tracks are arranged at an angle. The free end of the swing line can swing in any of the swing tracks, and each swing track is provided with the locking wire unit.

[0019] In some embodiments, the central regions of all the cycloids are interconnected to form a central void, wherein when the cycloid is not held by the locking unit and is in a stationary state, the center line of the central void coincides with the cycloid.

[0020] In some embodiments, the base includes a housing, a first surface is disposed on the housing, the mounting portion is connected to the housing, the locking wire unit is mounted on the housing, and the housing also has a second surface that is connected at an angle to the first surface. The second surface is recessed to form a threading groove that communicates with the swing path. The threading groove passes through the first surface, and the swing wire extends into the swing path through the threading groove.

[0021] The beneficial effects of the pendulum testing device provided in this application are as follows: the locking unit can automatically release the pendulum string, and after the locking unit releases the pendulum string, the pendulum string can swing only under its own gravity, which can reduce the introduction of human error and further improve the accuracy of the test results. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the pendulum testing apparatus provided in the embodiments of this application;

[0024] Figure 2 A schematic diagram of the housing and locking unit provided in an embodiment of this application;

[0025] Figure 3 A schematic diagram of the swing track, locking wire unit, and detection unit provided in the embodiments of this application;

[0026] Figure 4 for Figure 3 An enlarged view of point A in the diagram;

[0027] Figure 5 This is a schematic diagram of the locking unit and detection unit provided in the embodiments of this application.

[0028] The following are the labeling elements in the figure:

[0029] 100, base; 200, cycloid;

[0030] 1. Enclosure; 11. First surface; 12. Second surface; 13. Slide path; 14. Cable tray; 15. Central empty area;

[0031] 2. Locking unit; 21. Clamping component; 211. First clamping plate; 2111. First plate body; 2112. First rotating part; 212. Second clamping plate; 2121. Second plate body; 2122. Second rotating part; 213. First clamping part; 214. Second clamping part; 215. Rotating shaft; 22. Mounting bracket; 231. First magnetic component; 232. Second magnetic component; 24. Elastic component;

[0032] 3. Detection unit;

[0033] 4. Controller;

[0034] 5. Installation Department;

[0035] 6. Support section. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, "multiple sets" means two or more sets, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise explicitly specified.

[0040] In the safety monitoring system of a nuclear power plant, the Enclosure Auxiliary System (EAU) undertakes the core task of detecting containment deformation. This system continuously monitors key components of the containment to obtain high-precision deformation data, providing crucial information for assessing the structural integrity of the containment and for subsequent maintenance and repair work. It is a key link in ensuring the safe and stable operation of the nuclear power plant.

[0041] The accuracy of containment deformation detection directly determines the reliability of nuclear facility safety assessments, while the measurement accuracy of the EAU system is the foundation for achieving high-precision detection. Currently, the pendulum test is an important means of testing the accuracy of the EAU system. During the pendulum test, by allowing the pendulum to swing freely in multiple directions and collecting data such as the swing path and period from different orientations, a comprehensive and accurate assessment of the EAU system's accuracy can be achieved.

[0042] However, the pendulum testing apparatus of existing EAU systems has certain limitations. During testing, operators typically need to manually hold the pendulum string, pull it to a suitable angle, and then release it to allow the string to swing. Due to individual differences in manual operation, it is difficult to maintain consistency in the applied force and angle control, resulting in difficulty in precisely controlling the direction of the pendulum's swing and introducing significant human error into the test. This method not only affects the accuracy of the EAU system's precision assessment but may also adversely impact the reliability of containment deformation monitoring.

[0043] Based on this, this application provides a pendulum testing device, which improves the accuracy of pendulum test results by reducing human error through structural improvements.

[0044] Reference Figures 1 to 3 This application provides a pendulum testing device, including a base 100, a pendulum 200, and a locking unit 2. The base 100 has a first surface 11 facing upward along the direction of gravity, and the first surface 11 is recessed to form a pendulum path 13. The length direction of the pendulum path 13 extends horizontally. The base 100 has a mounting part 5, which is disposed above the first surface 11 along the direction of gravity. The fixed end of the pendulum 200 is connected to the mounting part 5, and the free end of the pendulum 200 can swing along the length direction of the pendulum path 13. The locking unit 2 is connected to the base 100, and the locking unit 2 is disposed in the pendulum path 13. The locking unit 2 can clamp the pendulum 200 so that the pendulum 200 forms an angle with the direction of gravity and remains stationary. The locking unit 2 can also release the pendulum 200 so that the pendulum 200 swings in the pendulum path 13.

[0045] It should be noted that the pendulum path 13 of the base 100 can be a virtual structure such as a hole, slot, or empty area. In this way, most of the resistance encountered by the pendulum 200 during its swing is air resistance, and the base 100 provides little or no resistance to the swing of the pendulum 200. In this embodiment, the pendulum test device can be provided with one or more pendulum paths 13. For example, when the pendulum test requires the pendulum 200 to swing along four plumb planes (the plumb planes are parallel to the direction of gravity and perpendicular to the horizontal plane), four pendulum paths 13 can be provided in the base 100, and the length direction of the four pendulum paths 13 extends in a direction parallel to the four plumb planes.

[0046] It should be noted that the direction of gravity is the X direction shown in the diagram.

[0047] It should be noted that a weight can be placed at the free end of the cycloid 200 to improve the overall swing effect of the cycloid 200; the weight can be part of the cycloid 200, and the wire locking unit 2 can be connected to the weight or to the wire part of the cycloid 200.

[0048] It should be noted that when multiple pendulum tracks 13 are provided, each pendulum track 13 is provided with a locking wire unit 2. The locking wire unit 2 can be located at the end of the pendulum track 13, or at other positions that allow the pendulum line 200 to form an angle with the direction of gravity. In addition, each pendulum track 13 can be provided with two locking wire units 2, which can be located at both ends of the pendulum track 13 respectively; alternatively, only one locking wire unit 2 can be provided in each pendulum track 13.

[0049] It should be noted that the locking unit 2 may include structures such as clips and baffles connected to the cycloidal line 200. When the locking unit 2 is connected to the cycloidal line 200, it can keep the cycloidal line 200 stationary. When the locking unit 2 releases the cycloidal line 200, the interaction force between the locking unit 2 and the cycloidal line 200 will disappear, and the locking unit 2 will not provide the oscillation power for the cycloidal line 200. The oscillation power of the cycloidal line 200 comes from the gravity of the cycloidal line 200.

[0050] The pendulum testing device provided in this application embodiment can automatically release the pendulum string 200 by the locking unit 2. After the locking unit 2 releases the pendulum string 200, the pendulum string 200 can swing only under its own gravity. This can reduce the introduction of human error and further improve the accuracy of the test results.

[0051] Reference Figure 4 and Figure 5The locking unit 2 includes a clamping member 21 and a driving assembly. The clamping member 21 is connected to the base 100. The clamping member 21 includes a first clamping part 213 and a second clamping part 214 movably connected to the first clamping part 213. The first clamping part 213 and the second clamping part 214 can abut against each other to clamp the cycloidal line 200. The first clamping part 213 and the second clamping part 214 can also separate to release the cycloidal line 200. The driving assembly is connected to at least one of the first clamping part 213 and the second clamping part 214 and is used to drive the first clamping part 213 and the second clamping part 214 to move closer or further away from each other to clamp or release the cycloidal line 200.

[0052] It should be noted that the drive component is connected to at least one of the first clamping part 213 and the second clamping part 214. The drive component can be connected to the first clamping part 213 or the second clamping part 214 alone, or the drive component can be connected to the first clamping part 213 and the second clamping part 214 at the same time.

[0053] It should be noted that the first clamping part 213 and the second clamping part 214 can be used to clamp the line part of the cycloid 200, or to clamp a heavy object on the cycloid 200. In addition, the cycloid 200 in the swinging state can be first pinched and pulled by the test personnel between the separated first clamping part 213 and the second clamping part 214, and then the first clamping part 213 and the second clamping part 214 are brought together so that the clamping member 21 can clamp the cycloid 200. After the clamping member 21 clamps the cycloid 200, the test personnel can release the cycloid 200. At this time, the cycloid 200 can remain stationary under the fixation of the clamping member 21.

[0054] It should be noted that the first clamping part 213 and the second clamping part 214 can be rotatably connected, and they can also be slidably connected; however, this embodiment of the application does not impose any limitations on this. Figure 4 and Figure 5 The first clamping part 213 and the second clamping part 214 shown are rotatably connected. When the first clamping part 213 and the second clamping part 214 rotate relative to each other, they can abut or separate.

[0055] It should be noted that the direction of relative movement between the first clamping part 213 and the second clamping part 214 is perpendicular to the length direction of the pendulum 13. Thus, when the first clamping part 213 and the second clamping part 214 separate to release the pendulum 200, the first clamping part 213 and the second clamping part 214 will not exert any additional force on the pendulum 200 to affect its oscillation.

[0056] The pendulum 200 can be fixed in place by the clamping force provided by the first clamping part 213 and the second clamping part 214 to remain stationary. When the first clamping part 213 and the second clamping part 214 separate, the clamping force provided by the locking unit 2 disappears, and the pendulum 200 is released, at which point the pendulum 200 can swing freely. The locking unit 2 fixes the pendulum 200 by clamping force. The connection between the locking unit 2 and the pendulum 200 is not limited by the material of the pendulum 200. For example, when the material of the pendulum 200 (the material of the string part and / or the material of the heavy object) is magnetic metal or non-magnetic metal, the pendulum 200 can be connected and fixed by the locking unit 2, thus improving versatility. The drive assembly drives the first clamping part 213 and the second clamping part 214 to move closer or further apart, which allows the pendulum test device to automatically release the pendulum 200, reducing the introduction of human error and helping to improve the accuracy of the test results.

[0057] In some embodiments, the driving component includes a first magnetic element 231 connected to the first clamping portion 213 and a second magnetic element 232 connected to the second clamping portion 214. At least one of the first magnetic element 231 and the second magnetic element 232 is an electromagnet. When the electromagnet is energized, the first magnetic element 231 and the second magnetic element 232 attract or repel each other, thereby driving the first clamping portion 213 and the second clamping portion 214 to move closer or further apart.

[0058] It should be noted that in some embodiments, the first magnetic element 231 and the second electromagnet can both be electromagnets; in other embodiments, the first magnetic element 231 is an electromagnet, while the second magnetic element 232 is a magnetic element of other types; and in still other embodiments, the first magnetic element 231 is a magnetic element of other types, while the second magnetic element 232 is an electromagnet. That is, at least one of the first magnetic element 231 and the second magnetic element 232 is an electromagnet. The other types of magnetic elements can be permanent magnets, magnetic metal blocks, or other magnetic elements capable of generating a magnetic force with an energized electromagnet.

[0059] It should be noted that in some embodiments, the abutment and separation of the first clamping part 213 and the second clamping part 214 are controlled by the magnetic force between the first magnetic element 231 and the second magnetic element 232. For example, when the electromagnet is energized, a magnetic attraction force can be generated between the first magnetic element 231 and the second magnetic element 232 to drive the first clamping part 213 and the second clamping part 214 to abut. When the energizing directions are opposite, a magnetic repulsion force can be generated between the first magnetic element 231 and the second magnetic element 232 to drive the first clamping part 213 and the second clamping part 214 to separate.

[0060] In other embodiments, when the electromagnet is energized, the magnetic attraction or repulsion between the first magnetic element 231 and the second magnetic element 232 can only provide the power required for the first clamping part 213 and the second clamping part 214 to resist each other. When the electromagnet is de-energized, the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, and the first clamping part 213 and the second clamping part 214 can be separated to restore the spacing.

[0061] In some embodiments, when the electromagnet is energized, the magnetic attraction or repulsion between the first magnetic element 231 and the second magnetic element 232 can only provide the power required for the separation of the first clamping part 213 and the second clamping part 214. When the electromagnet is de-energized, the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, and the first clamping part 213 and the second clamping part 214 can move closer to each other to restore their opposing forces.

[0062] By setting a first magnetic element 231 and a second magnetic element 232, and at least one of the first magnetic element 231 and the second magnetic element 232 being an electromagnet, the clamping force of the locking unit 2 on the cycloidal wire 200 can be adjusted by changing the energization state of the electromagnet, thereby facilitating the clamping or releasing of the cycloidal wire 200.

[0063] The drive assembly also includes an elastic element 24, which is connected between the first clamping part 213 and the second clamping part 214. When the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, the elastic force of the elastic element 24 can drive the first clamping part 213 and the second clamping part 214 to separate or abut against each other.

[0064] In some embodiments, a magnetic force is generated between the first magnetic element 231 and the second magnetic element 232 to drive the first clamping portion 213 and the second clamping portion 214 to abut against each other. When the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, the elastic force of the elastic element 24 can drive the first clamping portion 213 and the second clamping portion 214 to separate. In other embodiments, a magnetic force is generated between the first magnetic element 231 and the second magnetic element 232 to drive the first clamping portion 213 and the second clamping portion 214 to separate. When the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, the elastic force of the elastic element 24 can drive the first clamping portion 213 and the second clamping portion 214 to abut against each other.

[0065] The elastic force of the elastic element 24 can produce an effect when the magnetic force between the first magnetic element 231 and the second magnetic element 232 disappears, and the effect of the elastic force is opposite to the effect of the magnetic force. The driving force for the first clamping part 213 and the second clamping part 214 to resist and separate comes from the elastic force and the magnetic force, respectively. In this way, it is not necessary to change the current direction of the electromagnet to provide opposite forces to the first clamping part 213 and the second clamping part 214, which helps to simplify the circuit structure.

[0066] Reference Figure 5 The clamping member 21 also includes a first clamping plate 211 and a second clamping plate 212. The first clamping plate 211 is connected to the base 100 and the first clamping plate 211 and the second clamping plate 212 are rotatably connected. A first clamping part 213 is disposed at one end of the first clamping plate 211 and a second clamping part 214 is disposed at one end of the second clamping plate 212. The driving assembly is connected to at least one of the first clamping plate 211 and the second clamping plate 212.

[0067] It should be noted that in some embodiments, the drive component can be connected to the first clamping plate 211 or the second clamping plate 212 separately, while in other embodiments, the drive component can be connected to both the first clamping plate 211 and the second clamping plate 212 simultaneously.

[0068] The first clamping plate 211 and the second clamping plate 212 are rotatably connected, and the clamping member 21 is in the shape of a clamp. This helps to simplify the overall structure of the clamping member 21 and reduce the manufacturing cost of the pendulum test device.

[0069] In some embodiments, the first clamping part 213 may be a rubber pad, and the surface of the first clamping part 213 may be provided with a rough pattern.

[0070] In some embodiments, the second clamping portion 214 may be a rubber pad, and the surface of the second clamping portion 214 may be provided with a rough pattern.

[0071] In this embodiment, the central region of the first clamping plate 211 is rotatably connected to the central region of the second clamping plate 212. The driving assembly includes a first magnetic element 231 and a second magnetic element 232. In some embodiments, the first magnetic element 231 is mounted on the end of the first clamping plate 211 opposite to the first clamping portion 213, and the second magnetic element 232 is mounted on the end of the second clamping plate 212 opposite to the second clamping portion 214. At least one of the first magnetic element 231 and the second magnetic element 232 is an electromagnet. When the electromagnet is energized, causing the first magnetic element 231 and the second magnetic element 232 to generate magnetic attraction, the first clamping portion 213 and the second clamping portion 214 separate, allowing the clamping member 21 to release the clamped cycloid 200. When the energizing direction of one of the electromagnets is changed, the first magnetic element 231 and the second magnetic element 232 can generate magnetic repulsion, causing the first clamping portion 213 and the second clamping portion 214 to abut against each other, allowing the clamping member 21 to clamp the cycloid 200.

[0072] In other embodiments, the first magnetic element 231 may also be installed on one end of the first clamping plate 211 near the first clamping part 213, and the second magnetic element 232 may be installed on one end of the second clamping plate 212 near the second clamping part 214. In this case, when the electromagnet is energized, the first magnetic element 231 and the second magnetic element 232 generate magnetic attraction, and the first clamping part 213 and the second clamping part 214 abut against each other. When the energizing direction of one of the electromagnets is changed, the first magnetic element 231 and the second magnetic element 232 can generate magnetic repulsion, and the first clamping part 213 and the second clamping part 214 separate.

[0073] In some embodiments, the clamping member 21 includes a rotating shaft 215, and the first clamping plate 211 and the second clamping plate 212 are rotatably connected via the rotating shaft 215. The elastic member 24 may be a torsion spring sleeved on the rotating shaft 215. In other embodiments, the elastic member 24 may also be a helical spring, and both ends of the elastic member 24 are respectively connected to the first clamping plate 211 and the second clamping plate 212.

[0074] In this embodiment of the application, the first clamping plate 211 includes a first plate body portion 2111, and a first rotating portion 2112 is provided on the side of the first plate body portion 2111 facing the second clamping plate 212. The second clamping plate 212 includes a second plate body portion 2121, and a second rotating portion 2122 is provided on the side of the second plate body portion 2121 facing the first clamping plate 211. A rotating shaft 215 is sequentially passed through the first rotating portion 2112 and the second rotating portion 2122, and the rotating shaft 215 is rotatably connected to the first rotating portion 2112 and the second rotating portion 2122 respectively.

[0075] The first rotating part 2112 and the second rotating part 2122 are provided so that the first clamping plate 211 and the second clamping plate 212 can be easily connected to the rotating shaft 215, thereby reducing the assembly difficulty of the pendulum test device.

[0076] In this embodiment, the first plate portion 2111 has two spaced first rotating portions 2112 on the side facing the second clamping plate 212, and the second plate portion 2121 has two spaced second rotating portions 2122 on the side facing the first clamping plate 211. The two second rotating portions 2122 are located within the spaced area between the two first rotating portions 2112. This helps to balance the forces between the first clamping plate 211 and the second clamping plate 212, so that the clamping member 21 can stably clamp the cycloidal line 200.

[0077] Continue to refer to Figure 5 The pendulum testing device also includes a detection unit 3 connected to the base 100. Each pendulum track 13 is equipped with a detection unit 3. The detection unit 3 is used to detect the oscillation period information when the free end of the pendulum 200 oscillates in the corresponding pendulum track 13.

[0078] It should be noted that the oscillation period of the cycloid 200 includes information on the number of oscillations and the duration of oscillation.

[0079] The detection unit 3 is connected to the base 100. The detection unit 3 can detect the oscillation period information of the free end of the pendulum 200 swinging in the corresponding pendulum track 13, so as to obtain the corresponding detection information. Each pendulum track 13 is equipped with a detection unit 3, which can accurately detect the oscillation period information of the pendulum 200 in different pendulum tracks 13, thereby reducing human error and improving the accuracy of the test results.

[0080] In some embodiments, the pendulum testing device further includes a controller 4, which is mounted on the base 100. The controller 4 is communicatively connected to the locking wire unit 2 and the detection unit 3, respectively. The controller 4 can send a signal to the locking wire unit 2 to release the pendulum wire 200, and can send a start information to the detection unit 3 to start the detection unit 3. The controller 4 can also receive the oscillation period information from the detection unit 3.

[0081] It should be noted that the communication connection can be achieved through wired means such as wires, or wireless means such as Bluetooth, Wi-Fi, mobile networks, etc. The controller 4 can send a signal to the locking unit 2 to release the cycloidal wire 200. After receiving the signal from the controller 4 to release the cycloidal wire 200, the locking unit 2 can perform corresponding actions, such as separating the first clamping part 213 and the second clamping part 214.

[0082] It should be noted that in some embodiments, the controller 4 can send a signal to release the cycloidal wire 200 to the locking wire unit 2 and simultaneously send a start information to the detection unit 3 to start the detection unit 3. In other embodiments, the controller 4 can first send a signal to release the cycloidal wire 200 to the locking wire unit 2 and then send a start information to the detection unit 3. In still other embodiments, the controller 4 can first send a start information to the detection unit 3 and then send a signal to release the cycloidal wire 200 to the locking wire unit 2.

[0083] The controller 4 is connected to the wire-locking unit 2 and the detection unit 3 for communication. The controller 4 can send information to the wire-locking unit 2 and the detection unit 3, which facilitates the test and reduces the difficulty of the test operation.

[0084] In some embodiments, the controller 4 can send a signal to the locking unit 2 to release the cycloidal wire 200 while simultaneously sending a start message to the detection unit 3 to start the detection unit 3, thereby improving the accuracy of detection.

[0085] In some embodiments, the controller 4 may include a control panel that can be operated by an experimenter to send information to the wire-locking unit 2 and the detection unit 3.

[0086] In some embodiments, the controller 4 also includes a display that can display the oscillation period information received from the detection unit 3.

[0087] Reference Figure 5 The locking unit 2 also includes a mounting bracket 22 connected to the base 100, and the detection unit 3 is mounted on the mounting bracket 22.

[0088] The detection unit 3 is installed on the mounting bracket 22 of the wire-locking unit 2. The detection unit 3 is adjacent to the wire-locking unit 2. When the pendulum 200 swings to the vicinity of the wire-locking unit 2, its speed will become zero. The detection unit 3 can obtain the complete swing cycle of the pendulum 200 by detecting the number of times the speed of the pendulum 200 is zero, which can improve the accuracy of the test results.

[0089] In this embodiment, the mounting bracket 22 is located between the first clamping plate 211 and the second clamping plate 212, so that the detection unit 3 can be installed between the first clamping plate 211 and the second clamping plate 212, which helps to improve the accuracy of detection.

[0090] In this embodiment, the locking unit 2 is installed at the end of the pendulum 13, and the detection unit 3 is also installed at the end of the pendulum 13. After the test starts, when the detection unit 3 detects that the eleventh velocity of the free end of the pendulum 200 is zero, the pendulum 200 has swung for five cycles. At this time, the counting can be stopped to improve the accuracy of the test results.

[0091] In some embodiments, the clamping member 21 includes a pivot 215 connecting the first clamping plate 211 and the second clamping plate 212, and the mounting bracket 22 can be fixed to the end of the pivot 215.

[0092] In some embodiments, the detection unit 3 includes a miniature laser tester that can detect the number of times the cycloid 200 swings at a speed of zero.

[0093] In this embodiment of the application, multiple swing tracks 13 are provided, and the extension directions of any two swing tracks 13 are set at an angle. The free end of the swing line 200 can swing in any swing track 13, and a locking unit 2 is provided in each swing track 13.

[0094] Multiple swing paths 13 are provided on the base 100, and a locking unit 2 is provided in each swing path 13. By connecting the pendulum 200 to one of the locking units 2, the swing direction of the pendulum 200 when it is subsequently released can be determined, thus improving the accuracy of the test results. In addition, the presence of a locking unit 2 in each swing path 13 ensures that the initial state of the pendulum 200 remains consistent when it swings in different directions, reducing the introduction of human error and further improving the accuracy of the test results.

[0095] In some embodiments, the central regions of all the swing paths 13 are interconnected to form a central void 15, wherein when the swing line 200 is not clamped by the locking unit 2 and is in a stationary state, the center line of the central void 15 coincides with the swing line 200.

[0096] When the central areas of all the pendulum tracks 13 are interconnected, and the pendulum line 200 is not clamped by the locking unit and is in a stationary state, the center line of the central empty area 15 coincides with the pendulum line 200. The fixed end of the pendulum line 200 can be set on the center line of the central empty area 15. In this way, the free end of the pendulum line 200 can swing in any pendulum track 13 without changing the position of the fixed end. This makes it convenient to use the pendulum test device and reduces the difficulty of pendulum test operation.

[0097] Reference Figure 2 and Figure 3 The base 100 includes a housing 1, a first surface 11 disposed on the housing 1, a mounting part 5 connected to the housing 1, and a wire locking unit 2 mounted on the housing 1. (Continue referring to...) Figure 2 and Figure 3 The housing 1 also has a second surface 12 that is connected at an angle to the first surface 11. The second surface 12 is recessed to form a threading groove 14 that communicates with the swing channel 13. The threading groove 14 also penetrates the first surface 11, and the swing line 200 extends into the swing channel 13 through the threading groove 14.

[0098] During the pendulum test, the first surface 11 of the housing 1 faces upward along the direction of gravity; that is, during the pendulum test, the first surface 11 of the housing 1 is parallel to the horizontal plane. In other non-test situations, the placement of the housing 1 can be changed so that the first surface 11 can face downward or be arranged in a horizontal direction. A threading groove 14 is provided in the housing 1, through which the pendulum wire 200 can enter the pendulum path 13, reducing the probability of the pendulum wire 200 colliding with the housing 1, which helps to improve the accuracy of the test results and extend the service life of the pendulum test device.

[0099] In this embodiment, the base 100 further includes a support 6, and the mounting part 5 is connected to the housing 1 through the support 6.

[0100] In this embodiment, the pendulum test requires the pendulum line 200 to swing freely for five cycles along the four plumb planes. The housing 1 of the pendulum test device is equipped with a controller 4, and the housing 1 is also equipped with four pendulum tracks 13. The central areas of the four pendulum tracks 13 are interconnected, and the central areas of the pendulum tracks 13 are located in the direction of gravity at the fixed end of the pendulum line 200. The included angle between the length directions of two adjacent pendulum tracks 13 is 45°. Each end of the pendulum track 13 is equipped with a locking unit 2 and a detection unit 3. Both the locking unit 2 and the detection unit 3 are communicatively connected to the controller 4. The pendulum line 200 can be connected to any locking unit 2 to remain stationary. 2 includes a clamping member 21, a first magnetic member 231 mounted on a first clamping plate 211 of the clamping member 21, a second magnetic member 232 mounted on a second clamping plate 212, and an elastic member 24 connecting the first clamping plate 211 and the second clamping plate 212. The central regions of the first clamping plate 211 and the second clamping plate 212 are rotatably connected by a rotating shaft 215. The cooperative cooperation of the first magnetic member 231, the second magnetic member 232 and the elastic member 24 can cause the first clamping part 213 and the second clamping part 214 of the clamping member 21 to abut or separate to clamp or release the cycloidal line 200, thereby allowing the free end of the cycloidal line 200 to swing freely within the corresponding cycloidal track 13. The end of the rotating shaft 215 is also provided with a mounting bracket 22. The detection unit 3 is installed on the mounting bracket 22. The detection unit 3 includes a miniature laser velocimeter. The miniature laser velocimeter measures the speed of the cycloid 200. When the cycloid 200 swings to both ends, the speed is zero. When the speed is zero for the eleventh time, the cycloid 200 has swung for exactly five cycles. The counting stops, and the duration of the swing cycle is automatically counted and calculated. The average value is taken, which can improve the accuracy of the test.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pendulum testing device, characterized in that, include: The base has a first surface that faces upward along the direction of gravity, the first surface is recessed to form a swing path, the length direction of the swing path extends horizontally, and the base has a mounting part that is disposed above the first surface along the direction of gravity. A cycloid, wherein the fixed end of the cycloid is connected to the mounting portion, and the free end of the cycloid can swing along the length direction of the cycloid track; and A wire locking unit is connected to the base, and the wire locking unit is provided in the swing channel; The locking wire unit can clamp the pendulum so that the pendulum is at an angle to the direction of gravity and remains stationary; the locking wire unit can also release the pendulum so that the pendulum swings within the pendulum path.

2. The pendulum testing apparatus as described in claim 1, characterized in that, The locking unit includes a clamping member connected to the base and a driving assembly. The clamping member includes a first clamping part and a second clamping part movably connected to the first clamping part. The driving assembly is connected to at least one of the first clamping part and the second clamping part and is used to drive the first clamping part and the second clamping part to move closer or further away from each other in order to clamp or release the cycloidal line.

3. The pendulum testing apparatus as described in claim 2, characterized in that, The driving assembly includes a first magnetic element connected to the first clamping part and a second magnetic element connected to the second clamping part. At least one of the first magnetic element and the second magnetic element is an electromagnet. When the electromagnet is energized, the first magnetic element and the second magnetic element attract or repel each other, thereby driving the first clamping part and the second clamping part to move closer or further apart.

4. The pendulum testing apparatus as described in claim 3, characterized in that, The drive assembly further includes an elastic element connected between the first clamping portion and the second clamping portion; When the magnetic force between the first magnetic component and the second magnetic component disappears, the elastic force of the elastic component can drive the first clamping part and the second clamping part to separate or abut against each other.

5. The pendulum testing apparatus as described in claim 2, characterized in that, The clamping member further includes a first clamping plate and a second clamping plate. The first clamping plate is connected to the base and is rotatably connected to the second clamping plate. The first clamping part is disposed at one end of the first clamping plate and the second clamping part is disposed at one end of the second clamping plate. The driving component is connected to at least one of the first clamping plate and the second clamping plate.

6. The pendulum testing apparatus according to any one of claims 1-5, characterized in that, The pendulum testing device also includes a detection unit connected to the base. Each pendulum track is equipped with the detection unit, which is used to detect the oscillation period information of the free end of the pendulum line when it oscillates in the corresponding pendulum track.

7. The pendulum testing apparatus as described in claim 6, characterized in that, The locking unit also includes a mounting bracket connected to the base, and the detection unit is mounted on the mounting bracket.

8. The pendulum testing apparatus according to any one of claims 1-5, characterized in that, The swing path is provided in multiple ways, and the extension directions of any two swing paths are set at an angle. The free end of the swing line can swing in any of the swing paths. Each swing path is provided with the locking wire unit.

9. The pendulum testing apparatus as described in claim 8, characterized in that, The central regions of all the swing tracks are interconnected to form a central void, wherein when the swing line is not clamped by the locking unit and is in a stationary state, the center line of the central void coincides with the swing line.

10. The pendulum testing apparatus according to any one of claims 1-5, characterized in that, The base includes a housing, a first surface is disposed on the housing, the mounting part is connected to the housing, the locking wire unit is installed on the housing, and the housing also has a second surface that is connected at an angle to the first surface. The second surface is recessed to form a threading groove that communicates with the swing track. The threading groove passes through the first surface, and the swing wire extends into the swing track through the threading groove.

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