Frequency measuring equipment for bowl cavity components of superconducting cavities

Abstract

The present invention discloses a frequency measuring device for a bowl cavity component of a superconducting cavity. The bowl cavity component of the superconducting cavity comprises at least one bowl cavity, which has openings at both ends and is one large and one small. The frequency measuring device comprises: a working platform, an upper clamping device, a lower clamping device, a PLC controller and a computer communicating with the PLC controller, wherein the upper clamping device and the lower clamping device are both connected to the PLC controller; the upper clamping device can be raised and lowered above the working platform, the upper clamping device comprises an upper contact plate and at least three upper clamping jaws distributed around the edge of the upper contact plate, and the upper clamping jaws can be opened and closed; the lower clamping device comprises a lower contact plate and at least three lower clamping jaws distributed around the edge of the lower contact plate, the lower contact plate is arranged on the working platform, the working platform is provided with a first through groove corresponding to each lower clamping jaw, and the lower clamping jaw can be opened and closed in the first through groove; and at least the lower contact plate abuts against the large end of the bowl cavity.

Description

Technical Field

[0001] The present invention generally relates to the technical field of frequency measurement, and in particular to a frequency measurement device for a bowl cavity component of a superconducting cavity. Background Art

[0002] In the process of manufacturing superconducting cavities, the frequency measurement of parts and components is an essential means of quality management and quality assurance. Since the cavity parts are welded together, the high temperature and stress relaxation during the welding process will cause the cavity to deform again, so it is difficult to control the shape of the cavity parts simply by mechanical dimensions. In addition to the shape error of the cavity, welding shrinkage will also change the frequency. In addition, the field flatness of tuning the entire superconducting cavity to the correct frequency through the deformation of each cavity in the longitudinal direction will cause additional length errors. In order to achieve the correct frequency and the correct length, in the process of manufacturing superconducting cavities, a set of manual frequency measuring devices is currently designed to clamp the bowl cavity components to test the frequency of the bowl cavity components (such as half bowls, dumbbell components and end cavity components). However, the current manual frequency measuring device requires at least two operators to cooperate with each other, and the operators need to have a certain level of experience and judgment; and the single operation time is long, the manual operation is not repeatable, and the quality factor does not meet the standard, which will lead to re-installation and reading, increasing the measurement time of a single piece; in addition, due to the time cost and labor cost, the manual measurement device is not suitable for mass production and cannot meet the production schedule requirements. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a frequency measuring device for a bowl cavity component of a superconducting cavity.

[0004] An embodiment of the present invention provides a frequency measuring device for a bowl cavity component of a superconducting cavity, wherein the bowl cavity component of the superconducting cavity includes at least one bowl cavity, wherein both ends of the bowl cavity are open and one is large and the other is small, and the frequency measuring device includes: a working platform, an upper clamping device, a lower clamping device, a PLC controller, and a computer communicating with the PLC controller, wherein both the upper clamping device and the lower clamping device are connected to the PLC controller;

[0005] The upper clamping device is liftably arranged above the working platform, and the upper clamping device comprises an upper contact plate and at least three upper clamping jaws distributed around the edge of the upper contact plate, and the upper clamping jaws can be opened and closed;

[0006] The lower clamping device comprises a lower contact plate and at least three lower clamping jaws distributed around the edge of the lower contact plate, the lower contact plate is arranged on the working platform, the working platform is provided with first through slots corresponding to each of the lower clamping jaws, and the lower clamping jaws can be opened and closed in the first through slots; and

[0007] At least the lower contact plate abuts against the large end of the bowl cavity.

[0008] Preferably, the upper clamping device further comprises: a liftable support frame, a first support plate for mounting the upper contact plate, and a first driving device for driving the upper clamping jaw to open and close;

[0009] The first support plate is provided with second through slots corresponding to the upper clamping jaws one by one, and the upper clamping jaws are arranged in the second through slots in an openable and closable manner;

[0010] The support frame includes a bottom plate and side plates connected to the bottom plate, the bottom plate is parallel to the first support plate, and the bottom plate and the first support plate are connected via an elastic threaded fastening assembly.

[0011] Preferably, the frequency measuring device for the bowl cavity component of the superconducting cavity also includes: a lifting drive device for driving the upper clamping device to lift and lower, and a descending limit device for limiting the downward movement position of the upper clamping device; the lifting drive device includes a driving screw, a driving motor, two slide rails, a lifting threaded member and a lifting plate member, the output shaft of the driving motor is connected to the driving screw, the driving screw is arranged between the two slide rails, the lifting threaded member is threadedly connected to the driving screw, the lifting plate member is fixedly connected to the lifting threaded member, and the lifting plate member is slidably connected to the two slide rails, and the driving motor is electrically connected to the PLC controller;

[0012] The descent limit device is arranged on the driving screw and / or the two slide rails, and the height of the descent limit device is adjustable; the side plate of the supporting frame is fixedly connected to the lifting plate.

[0013] Preferably, the first driving device comprises a first telescopic motor, a second support plate and a plurality of first connecting rods corresponding to the upper clamping jaws one by one, and the first telescopic motor is electrically connected to the PLC controller;

[0014] The first telescopic motor and the first connecting rod are respectively arranged on opposite sides of the second supporting plate, the telescopic shaft of the first telescopic motor is connected to the second supporting plate through an adapter, one end of the first connecting rod is hinged to the second supporting plate, and the other end of the first connecting rod is hinged to the upper clamping claw;

[0015] The second supporting plate is provided with a first support corresponding to the upper clamping jaw, and the upper clamping jaw is also hinged to the first support.

[0016] Preferably, a first annular pressure sensor is sleeved on the telescopic shaft of the first telescopic motor, and the first annular pressure sensor is electrically connected to the PLC controller; or,

[0017] A first patch pressure sensor is attached to the clamping surface of each upper clamping jaw, and the first patch pressure sensor is electrically connected to the PLC controller.

[0018] Preferably, the elastic threaded fastening assembly comprises a pressure spring, a screw and a nut, the pressure spring is sleeved on the screw and is located between the base plate and the first support plate, and the nut is tightly matched with the screw.

[0019] Preferably, the lower clamping device further comprises a second driving device for driving the lower clamping jaw to open and close, the second driving device comprises a second telescopic motor, a third support plate and a plurality of second connecting rods corresponding to the lower clamping jaws one by one, and the second telescopic motor is electrically connected to the PLC controller;

[0020] The second telescopic motor and the second connecting rod are respectively arranged on opposite sides of the third supporting plate, the telescopic shaft of the second telescopic motor is connected to the third supporting plate through an adapter, one end of the second connecting rod is hinged to the third supporting plate, and the other end of the second connecting rod is hinged to the lower clamping claw;

[0021] The working platform is also provided with a second support corresponding to the lower clamping jaw, and the lower clamping jaw is also hinged to the second support.

[0022] Preferably, a second annular pressure sensor is sleeved on the telescopic shaft of the second telescopic motor, and the second annular pressure sensor is electrically connected to the PLC controller; or,

[0023] A second patch pressure sensor is attached to the clamping surface of each lower clamping jaw, and the second patch pressure sensor is electrically connected to the PLC controller.

[0024] Preferably, the upper contact plate and the lower contact plate each include an annular base and a contact plate disposed on the base, a plurality of slots are disposed around the edge of the contact plate, each of the slots is distributed along the radial direction of the contact plate, a sealing ring is disposed between the base and the contact plate, the slots are located on the contact plate, an annular groove is disposed around the base facing the slots, a sealing ring is disposed in the annular groove, the sealing ring is higher than the base, and a circle of the contact plate provided with the slots fits the sealing ring;

[0025] The contact plate of the upper contact plate is located on a side of the base of the upper contact plate close to the working platform, and the contact plate of the lower contact plate is located on a side of the base of the lower contact plate away from the working platform.

[0026] Preferably, the frequency measuring device for the bowl cavity component of the superconducting cavity further includes two perturbations, a third telescopic motor and a fourth telescopic motor, and the third telescopic motor and the fourth telescopic motor are electrically connected to the PLC controller respectively;

[0027] The upper contact plate and the lower contact plate are respectively provided with via holes, each of the via holes corresponds to one of the perturbations, and the perturbations can enter and exit the corresponding via holes;

[0028] The telescopic shaft of the third telescopic motor and the telescopic shaft of the fourth telescopic motor are respectively connected to one of the perturbations;

[0029] Antenna connection ports are respectively arranged at the centers of the upper contact plate and the lower contact plate, and the antenna connection ports are suitable for connecting to a network analyzer via a cable.

[0030] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0031] The frequency measuring device for the bowl cavity component of the superconducting cavity provided in the embodiment of the present invention controls the automatic movement of the upper clamping device, the automatic opening and closing of the upper clamping jaws, and the automatic opening and closing of the lower clamping jaws through the cooperation of a computer and a PLC controller, thereby automatically clamping the bowl cavity component, and can be operated by a single person, and the single test time can be reduced by 50-60%, effectively improving the work efficiency; the reading can be automatically read, avoiding the process of repeated clamping and reading operations;

[0032] Preferably, an antenna connection port is provided at the center of each contact plate, which can be connected to a network analyzer via a cable to measure the resonant frequency and quality factor and check the contact between the bowl cavity component and the contact plate;

[0033] A through hole for placing a perturbation body is arranged on the contact plate. The perturbation body can automatically enter and exit the through hole. The frequency of each bowl cavity component is measured through frequency change. The method is suitable for measuring the asymmetry of dumbbell components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0035] Figure 1 A schematic diagram of the structures of various bowl cavity components provided by an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the structure of a superconducting cavity provided by an embodiment of the present invention;

[0037] Figure 3 A schematic structural diagram of a frequency measuring device for a bowl cavity component of a superconducting cavity provided in an embodiment of the present invention;

[0038] Figure 4 for Figure 5 Schematic diagram of some structures in;

[0039] Figure 5 for Figure 4 A schematic diagram of the structure from a side view;

[0040] Figure 6 for Figure 4 A three-dimensional schematic diagram of the example structure at a first viewing angle;

[0041] Figure 7 for Figure 4 A three-dimensional schematic diagram of the example structure in the second viewing angle (without the working platform);

[0042] Figure 8 A schematic diagram of the connection structure of the upper clamping jaw provided in an embodiment of the present invention;

[0043] Fig. 9 A schematic diagram of the connection structure of the lower clamping jaw provided in an embodiment of the present invention;

[0044] Fig.10 A schematic structural diagram of the lower clamping jaw provided in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 11-Working Platform

[0047] 12-Computer

[0048] 13- Equipment cabinet

[0049] 21-Upper contact plate

[0050] 22-Upper jaw

[0051] 23-Support frame

[0052] 231-base plate

[0053] 232-Side Panel

[0054] 233-Reinforcement plate

[0055] 24-First support plate

[0056] 25- Second support plate

[0057] 26-First connecting rod

[0058] 27-First support

[0059] 28-First annular pressure sensor

[0060] 29-Elastic thread fastening assembly

[0061] 31-Lower contact plate

[0062] 32-Lower jaw

[0063] 33- Third support plate

[0064] 34-Second connecting rod

[0065] 35-Second support

[0066] 36-Second annular pressure sensor

[0067] 40-Lifting plate

[0068] 41-First bracket

[0069] 42-Second bracket

[0070] 43-Third bracket

[0071] 44-Fourth bracket

[0072] 51-First telescopic motor

[0073] 52-Second telescopic motor

[0074] 53-Third telescopic motor

[0075] 54-Fourth telescopic motor DETAILED DESCRIPTION

[0076] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0077] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the invention belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0078] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0079] 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.

[0080] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0081] Reference Figure 1 The bowl cavity components mentioned in the present invention include end cavity components (such as long end components or short end components), half bowl components, dumbbell components and double dumbbell components, etc. Such bowl cavity components all include at least one bowl cavity, the bowl cavity is open at both ends and is one large and one small. The half bowl component includes one bowl cavity, the dumbbell component includes two bowl cavities, the double dumbbell component includes four bowl cavities, and the long end component and the short cavity component include one bowl cavity and an end cavity connected to the small end of the bowl cavity.

[0082] Reference Figure 2 An embodiment of the present invention provides a 1.3Ghz 9-cell superconducting cavity, including 16 half-bowl components (ie, 8 dumbbell components or 4 dumbbell components), 1 long-end component and 1 short-end component.

[0083] Reference Figures 3 to 7 , an embodiment of the present invention provides a frequency measuring device for a bowl cavity component of a superconducting cavity, comprising: a working platform 11, an upper clamping device, a lower clamping device, a PLC controller, and a computer 12 communicating with the PLC controller, wherein the upper clamping device and the lower clamping device are both connected to the PLC controller;

[0084] The upper clamping device is escalably disposed above the working platform 11, and includes an upper contact plate 21 and at least three upper clamping jaws 22 distributed around the edge of the upper contact plate 21, and the upper clamping jaws 22 can be opened and closed;

[0085] The lower clamping device includes a lower contact plate 31 and at least three lower clamping jaws 32 distributed around the edge of the lower contact plate 31. The lower contact plate 31 is arranged on the working platform 11. The working platform 11 is provided with first through grooves corresponding to each lower clamping jaw 32. The lower clamping jaw 32 can be opened and closed in the first through grooves; and

[0086] At least the lower contact plate 31 abuts against the large end of the bowl.

[0087] In this embodiment, the working platform 11 is a horizontal operating platform, the lower clamping jaw 32 of the lower clamping device can be opened and closed in the first through slot of the working platform 11, the bowl cavity component to be tested is placed on the working platform 11, and the lower clamping jaw 32 first clamps the bowl cavity component; the upper clamping device can move up and down above the working platform 11, and the upper clamping jaw 22 can be opened and closed;

[0088] The working platform 11 is the top of the equipment cabinet 13, the PLC controller is arranged inside the equipment cabinet 13, and the operating software is installed in the computer. By setting the operating program, related parameters, etc., the computer communicates with the PLC controller to control the automatic operation of the upper clamping device and the lower clamping device.

[0089] For example, if the bowl cavity component is an end cavity assembly or a half bowl, and the bowl cavity component includes a bowl cavity, the lower contact plate contacts the large end of the bowl cavity, the lower clamping jaw clamps the large end of the bowl cavity, and the upper contact plate abuts against the end of the bowl cavity component away from the large end of the bowl cavity, and the bowl cavity component is clamped between the upper contact plate and the lower contact plate by applying pressure;

[0090] For example, the bowl cavity component is a dumbbell assembly or a double dumbbell assembly, the bowl cavity component includes multiple bowl cavities, the lower contact plate and the upper contact plate respectively contact the large end of the bowl cavity, and the lower clamp and the upper clamp respectively clamp the end of the bowl cavity component.

[0091] Furthermore, the upper clamping device also includes: a liftable support frame 23, a first support plate 24 for mounting the upper contact plate 21, and a first driving device for driving the upper clamping jaw 22 to open and close;

[0092] The first support plate 24 is provided with second through slots corresponding to the upper clamping jaws 22 one by one, and the upper clamping jaws 22 are arranged in the second through slots in an openable and closable manner;

[0093] The support frame 23 includes a bottom plate 231 and a side plate 232 connected to the bottom plate 231 . The bottom plate 231 is parallel to the first support plate 24 . The bottom plate 231 and the first support plate 24 are connected via an elastic threaded fastening assembly 29 .

[0094] In this embodiment, when clamping the bowl cavity component, the upper contact plate 21 and the upper clamping jaw 22 are driven to move up and down as a whole by the liftable support frame 23, and the upper contact plate 21 and the upper clamping jaw 22 are initially moved to a suitable position, so that the upper contact plate 21 abuts against the bowl cavity component, and then the upper clamping jaw 22 is further driven to close by the first driving device. For example, the bowl cavity component is a dumbbell component or a double dumbbell component, and the upper clamping jaw clamps the end of the corresponding bowl cavity component;

[0095] The support frame 23 further includes two reinforcing plates 233 . The reinforcing plates 233 are located on both sides of the side plates 232 and connect the bottom plate 231 and the side plates 232 , so that the support frame 23 is relatively stable.

[0096] In some optional embodiments, the frequency measuring device further includes: a lifting drive device for driving the upper clamping device to lift and lower, and a descending limit device for limiting the downward movement position of the upper clamping device, the lifting drive device includes a driving screw, a driving motor, two slide rails, a lifting threaded member, and a lifting plate 41, the output shaft of the driving motor is connected to the driving screw, the driving screw is arranged between the two slide rails, the lifting threaded member is threadedly connected to the driving screw, the lifting plate 41 is fixedly connected to the lifting threaded member, the lifting plate 41 has a slide groove that slides with the two slide rails, the lifting plate 41 is slidably connected to the two slide rails, and the driving motor is electrically connected to the PLC controller;

[0097] The descent limit device is arranged on the driving screw rod and / or the two slide rails, and the height of the descent limit device is adjustable;

[0098] The side plates 232 of the support frame 23 are fixedly connected to the lifting plate 41 .

[0099] Among them, the descent limit device can be a threaded block arranged at the lower part of the driving screw. In the length direction of the driving screw, the driving screw is provided with a plurality of positioning holes, and the threaded block is provided with connecting holes. The threaded block can be connected to the slide rail by screws, and the plurality of positioning holes facilitate the adjustment of the height of the threaded block, so that the height of the upper contact plate in the upper clamping device from the working platform can adapt to different bowl cavity components.

[0100] Alternatively, the descent limit device can be a limit block arranged on the slide rail. In the length direction of the slide rail, the slide rail is provided with a plurality of positioning holes, and the limit block is provided with connecting holes. The limit block can be connected to the slide rail by screws, and the plurality of positioning holes facilitate the adjustment of the height of the limit block, so that the height of the upper contact plate in the upper clamping device from the working platform can adapt to different bowl cavity components.

[0101] In this embodiment, the driving motor drives the driving screw to rotate, and when the driving screw rotates, the lifting screw member can move along the two slide rails, thereby driving the lifting plate member 41 to move along the axial direction of the driving screw, and the corresponding support frame 23 moves synchronously with the lifting plate member 41. When the driving motor rotates forward and reverse, the moving direction of the lifting plate member 41 is different, for example, when the driving motor rotates forward, the lifting plate member descends; when the driving motor rotates reversely, the lifting plate member rises.

[0102] In some optional embodiments, the first driving device includes a first telescopic motor 51, a second support plate 25, and a plurality of first connecting rods 26 corresponding one-to-one to the upper clamping jaws 22, and the first telescopic motor is electrically connected to the PLC controller;

[0103] The first telescopic motor and the first connecting rod 26 are respectively arranged on opposite sides of the second supporting plate 25, the telescopic shaft of the first telescopic motor is connected to the second supporting plate 25 through an adapter, one end of the first connecting rod 26 is hinged to the second supporting plate 25, and the other end of the first connecting rod 26 is hinged to the upper clamping claw 22;

[0104] Combination Figure 8 A first support 27 corresponding to the upper clamping jaw 22 is provided on the second supporting plate 25 , and the upper clamping jaw 22 is also hinged to the first support 27 .

[0105] In this embodiment, the telescopic shaft of the first telescopic motor 51 is connected to one side of the second support plate 25, one end of the first connecting rod 26 is hinged to the mounting seat on the other side of the second support plate 25, the other end of the first connecting rod 26 is hinged to the end of the upper clamping jaw 22, and the middle part of the upper clamping jaw 22 is also hinged to the first support 27 on the second support plate 25. When the telescopic shaft of the first telescopic motor 51 extends and moves toward the working platform 11, the first telescopic motor drives the second support plate 25 to approach the working platform 11, and at the same time, the angle between the axis of the first connecting rod 26 and the vertical direction gradually increases, and the upper clamping jaw 22 changes from an open state to a closed state; if the telescopic shaft of the second telescopic motor moves in a direction away from the working platform 11, the upper clamping jaw 22 is in an open state.

[0106] Optionally, the bottom plate 231 of the support frame 23 has an opening, the second support plate 25 is opposite to the opening of the bottom plate 231, and the first connecting rod 26 is located in the opening of the bottom plate 231;

[0107] A first bracket 41 is installed on the first support plate 24. The first bracket 41 is located on a side of the first support plate 24 away from the working platform, and the first bracket 41 is located in an opening of the bottom plate 231. The first bracket 41 is in an inverted U-shape for installing a first telescopic motor 51. The first telescopic motor 51 is installed on the top of the first bracket 41, and the second support plate 25 is located in the frame of the first bracket 41.

[0108] Further, a first annular pressure sensor 28 is sleeved on the telescopic shaft of the first telescopic motor 51, and the first annular pressure sensor 28 is electrically connected to the PLC controller. Since the upper clamp is connected to the first connecting rod, and the first connecting rod is connected to the second support plate 25, the first annular pressure sensor 28 senses the force between the second support plate 25 and the telescopic shaft of the first telescopic motor, thereby sensing the force between the upper clamp and the telescopic shaft of the first telescopic motor, and measuring the force between the upper clamp and the bowl cavity component to be measured; or,

[0109] A first patch pressure sensor is attached to the clamping surface of each upper clamping jaw 22. The first patch pressure sensor is electrically connected to the PLC controller, so that the force between the upper clamping jaw and the bowl cavity component to be measured can be directly measured.

[0110] As a preferred embodiment, the elastic threaded fastening assembly 29 includes a pressure spring, a screw and a nut. The pressure spring is sleeved on the screw and is located between the bottom plate 231 and the support plate. The nut is fastened to the screw.

[0111] When the upper contact plate 21 contacts the bowl cavity component and the upper clamping jaws clamp the bowl cavity component, the elastic threaded fastener can allow the upper contact plate to be slightly adjusted, so that the upper contact plate 21 and the upper clamping jaws 22 can contact the bowl cavity component well.

[0112] In some optional embodiments, the lower clamping device further includes a second driving device for driving the lower clamping jaw 32 to open and close, the second driving device includes a second telescopic motor 52, a third support plate 33, and a plurality of second connecting rods 34 corresponding to the lower clamping jaws 32, and the second telescopic motor 52 is electrically connected to the PLC controller;

[0113] The second telescopic motor and the second connecting rod 34 are respectively arranged on opposite sides of the third supporting plate 33, the telescopic shaft of the second telescopic motor is connected to the third supporting plate 33 through an adapter, one end of the second connecting rod 34 is hinged to the third supporting plate 33, and the other end of the second connecting rod 34 is hinged to the lower clamping claw 32;

[0114] Combination Fig. 9 A second support 35 corresponding to the lower clamping jaw 32 is also provided on the working platform 11 , and the lower clamping jaw 32 is also hinged to the second support 35 .

[0115] In this embodiment, the telescopic shaft of the second telescopic motor 52 is connected to one side of the third support plate 33, one end of the second connecting rod 34 is hinged to the mounting seat on the other side of the third support plate 33, the other end of the second connecting rod 34 is hinged to the end of the lower clamping jaw 32, and the middle part of the lower clamping jaw 32 is also hinged to the second support 35 on the third support plate 33. When the telescopic shaft of the second telescopic motor extends and moves toward the working platform 11, the second telescopic motor drives the third support plate 33 to approach the working platform 11, and at the same time, the angle between the axis of the second connecting rod 34 and the vertical direction gradually increases, and the lower clamping jaw 32 changes from an open state to a closed state; if the telescopic shaft of the second telescopic motor moves away from the working platform 11, the lower clamping jaw 32 is in an open state;

[0116] The second bracket 42 is connected to the inner side of the equipment cabinet by screws, and the second telescopic motor 52 is connected to the second bracket 42 .

[0117] Furthermore, a second annular pressure sensor 36 is sleeved on the telescopic shaft of the second telescopic motor 52, and the second annular pressure sensor 36 is electrically connected to the PLC controller. Since the lower clamp is connected to the second connecting rod, and the second connecting rod is connected to the third support plate 33, the second annular pressure sensor 36 senses the force between the third support plate 33 and the telescopic shaft of the second telescopic motor, thereby sensing the force between the lower clamp and the telescopic shaft of the second telescopic motor, and measuring the force between the lower clamp and the bowl cavity component to be measured; or, or,

[0118] A second patch pressure sensor is attached to the clamping surface of each lower clamping jaw 32, and the second patch pressure sensor is electrically connected to the PLC controller, so that the force between the lower clamping jaw and the bowl cavity component to be measured can be directly measured.

[0119] In the embodiments of the present invention, referring to Fig.10The lower clamping jaw 32 includes a clamping jaw body 321 and a clamping jaw portion 322. One end of the clamping jaw body 321 has a first through hole 3211 for being hinged to the second connecting rod. The middle part of the clamping jaw body 321 has a second through hole 3212 hinged to the second support. The clamping jaw body 321 also has a third through hole 3213. The axes of the first through hole 3211 and the second through hole 3212 are respectively perpendicular to the axis of the third through hole 3213. The screws in 213 connect the clamping jaw part 322 to the clamping jaw body 321; the clamping jaw part 322 has a clamping jaw body 3221 and a fitting part 3222, the clamping jaw body 3221 and the clamping jaw body 321 are connected by screws, the fitting part 3222 can be movably inserted into the clamping jaw part 3221, the fitting part 3222 is an arc-shaped cylinder so that the fitting part can abut the outside of the bowl cavity well, and the clamping jaw body 3221 has an arc-shaped guide rail adapted to the arc-shaped cylinder. In the embodiment of the present invention, the structures of the upper clamping jaw 22 and the lower clamping jaw 32 are the same, so the structure of the upper clamping jaw is not described in detail.

[0120] As a preferred embodiment, the upper contact plate 21 and the lower contact plate 31 each include an annular base and a contact plate disposed on the base, and a plurality of slots are disposed around the edge of the contact plate, each slot being distributed along the radial direction of the contact plate, such as Figure 8 As shown, a sealing ring is provided between the base and the contact plate, and the slot is located on the contact plate. An annular groove is provided on the base opposite to the slot, and a sealing ring is provided in the annular groove. The sealing ring is higher than the base, and the contact plate is provided with a slot that fits the sealing ring;

[0121] The contact plate of the upper contact plate 21 is located on a side of the base of the upper contact plate 21 close to the working platform 11 , and the contact plate of the lower contact plate 31 is located on a side of the base of the lower contact plate 31 away from the working platform 11 .

[0122] Optionally, the contact disk may be a niobium disk or a copper disk.

[0123] Among them, the size of the end of the bowl cavity assembly does not exceed the size of the contact plate, and the radio frequency range is covered by the contact plate; and the contact plate of each contact plate is provided with a circle of slots and a sealing ring is provided between the base, so that when the end of the end cavity assembly is uneven, good electrical contact between the end of the end cavity assembly and the contact plate can be ensured.

[0124] In the embodiment of the present invention, the frequency measuring device for the bowl cavity component of the superconducting cavity further includes two perturbations, a third telescopic motor 53 and a fourth telescopic motor 54, and the third telescopic motor 53 and the fourth telescopic motor 54 are electrically connected to the PLC controller respectively;

[0125] The upper contact plate 21 and the lower contact plate 31 are respectively provided with via holes, each via hole corresponds to a perturbation body, and the perturbation body can enter and exit the corresponding via hole;

[0126] The telescopic shaft of the third telescopic motor 53 and the telescopic shaft of the fourth telescopic motor 54 are respectively connected to a perturbation body;

[0127] Antenna connection ports are respectively provided at the center of the upper contact plate 21 and the lower contact plate 31 , and the antenna connection ports are suitable for connecting to a network analyzer via a cable.

[0128] In this embodiment, since the second support plate 25 is farther away from the working platform 11 than the first support plate 21, a fourth bracket 43 for installing the third telescopic motor is provided on the first support plate 21, and the fourth bracket 43 includes a first horizontal portion connected to the first support plate, a first vertical portion bent and connected to the first horizontal portion, and a second horizontal portion bent and connected to the first vertical portion, the first horizontal portion and the second horizontal portion are respectively located on both sides of the first vertical portion in a direction perpendicular to the first vertical portion, a third telescopic motor is fixed between the second horizontal portion and the second support plate, a perturbation body is connected to the telescopic shaft of the third telescopic motor, and the axis of the through hole of the upper contact plate is colinear with the axis of the telescopic shaft of the third telescopic motor;

[0129] A fourth bracket 44 for installing a fourth telescopic motor 54 is provided on the working platform 11, and the second bracket 42 includes a third horizontal portion connected to the working platform, a second vertical portion bent and connected to the third horizontal portion, and a fourth horizontal portion bent and connected to the second vertical portion, and the third horizontal portion and the fourth horizontal portion are respectively located on both sides of the second vertical portion in a direction perpendicular to the second vertical portion, and a fourth telescopic motor is fixed between the fourth horizontal portion and the third support plate 33, and a micro-perturbation body is connected to the telescopic shaft of the fourth telescopic motor, and the axis of the through hole of the lower contact plate is colinear with the axis of the telescopic shaft of the fourth telescopic motor.

[0130] The perturbation body can cause perturbations to the bowl cavity component and change the frequency of the bowl cavity component; the network analyzer measures the resonance frequency and quality factor and checks the contact conditions between the bowl cavity component and each contact plate.

[0131] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) by each other.

Claims

1. A frequency measuring device for a bowl cavity component of a superconducting cavity, wherein the bowl cavity component of the superconducting cavity comprises at least one bowl cavity, wherein both ends of the bowl cavity are open and one is large and the other is small, and wherein: The frequency measuring device comprises: a working platform, an upper clamping device, a lower clamping device, a PLC controller and a computer communicating with the PLC controller, wherein the upper clamping device and the lower clamping device are both connected to the PLC controller; The upper clamping device is liftably arranged above the working platform, and the upper clamping device comprises an upper contact plate and at least three upper clamping jaws distributed around the edge of the upper contact plate, and the upper clamping jaws can be opened and closed; The lower clamping device comprises a lower contact plate and at least three lower clamping jaws distributed around the edge of the lower contact plate, the lower contact plate is arranged on the working platform, the working platform is provided with first through slots corresponding to each of the lower clamping jaws, and the lower clamping jaws can be opened and closed in the first through slots; and At least the lower contact plate abuts against the large end of the bowl cavity.

2. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 1, characterized in that: The upper clamping device further comprises: a liftable support frame, a first support plate for mounting the upper contact plate, and a first driving device for driving the upper clamping jaw to open and close; The first support plate is provided with second through slots corresponding to the upper clamping jaws one by one, and the upper clamping jaws are arranged in the second through slots in an openable and closable manner; The support frame includes a bottom plate and side plates connected to the bottom plate, the bottom plate is parallel to the first support plate, and the bottom plate and the first support plate are connected via an elastic threaded fastening assembly.

3. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 2, characterized in that: Also includes: A lifting drive device for driving the upper clamping device to lift and lower, and a descent limit device for limiting the downward movement position of the upper clamping device; The lifting drive device comprises a driving screw, a driving motor, two slide rails, a lifting threaded member and a lifting plate member, the output shaft of the driving motor is connected to the driving screw, the driving screw is arranged between the two slide rails, the lifting threaded member is threadedly connected to the driving screw, the lifting plate member is fixedly connected to the lifting threaded member, and the lifting plate member is slidably connected to the two slide rails, and the driving motor is electrically connected to the PLC controller; The descent limit device is arranged on the driving screw and / or the two slide rails, and the height of the descent limit device is adjustable; The side plates of the support frame are fixedly connected to the lifting plate.

4. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 2, characterized in that: The first driving device comprises a first telescopic motor, a second support plate and a plurality of first connecting rods corresponding to the upper clamping jaws one by one, and the first telescopic motor is electrically connected to the PLC controller; The first telescopic motor and the first connecting rod are respectively arranged on opposite sides of the second supporting plate, the telescopic shaft of the first telescopic motor is connected to the second supporting plate through an adapter, one end of the first connecting rod is hinged to the second supporting plate, and the other end of the first connecting rod is hinged to the upper clamping claw; The second supporting plate is provided with a first support corresponding to the upper clamping jaw, and the upper clamping jaw is also hinged to the first support.

5. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 4, characterized in that: A first annular pressure sensor is sleeved on the telescopic shaft of the first telescopic motor, and the first annular pressure sensor is electrically connected to the PLC controller; or, A first patch pressure sensor is attached to the clamping surface of each upper clamping jaw, and the first patch pressure sensor is electrically connected to the PLC controller.

6. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 2, characterized in that: The elastic threaded fastening assembly comprises a pressure spring, a screw and a nut. The pressure spring is sleeved on the screw and is located between the bottom plate and the first supporting plate. The nut is tightly matched with the screw.

7. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 2, characterized in that: The lower clamping device also includes a second driving device for driving the lower clamping jaw to open and close, the second driving device includes a second telescopic motor, a third support plate and a plurality of second connecting rods corresponding to the lower clamping jaws one by one, and the second telescopic motor is electrically connected to the PLC controller; The second telescopic motor and the second connecting rod are respectively arranged on opposite sides of the third supporting plate, the telescopic shaft of the second telescopic motor is connected to the third supporting plate through an adapter, one end of the second connecting rod is hinged to the third supporting plate, and the other end of the second connecting rod is hinged to the lower clamping claw; The working platform is also provided with a second support corresponding to the lower clamping jaw, and the lower clamping jaw is also hinged to the second support.

8. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 7, characterized in that: A second annular pressure sensor is sleeved on the telescopic shaft of the second telescopic motor, and the second annular pressure sensor is electrically connected to the PLC controller; or, A second patch pressure sensor is attached to the clamping surface of each lower clamping jaw, and the second patch pressure sensor is electrically connected to the PLC controller.

9. The frequency measuring device for the bowl cavity component of a superconducting cavity according to claim 1, characterized in that: The upper contact plate and the lower contact plate each include an annular base and a contact plate disposed on the base, a circle of the edge of the contact plate is provided with a plurality of slots, each of the slots is distributed along the radial direction of the contact plate, a sealing ring is provided between the base and the contact plate, the slots are located on the contact plate, a circle of the base facing the slots is provided with an annular groove, the sealing ring is provided in the annular groove, the sealing ring is higher than the base, and a circle of the contact plate provided with the slots fits the sealing ring; The contact plate of the upper contact plate is located on a side of the base of the upper contact plate close to the working platform, and the contact plate of the lower contact plate is located on a side of the base of the lower contact plate away from the working platform.

10. The frequency measuring device for the bowl cavity component of a superconducting cavity according to any one of claims 1 to 9, characterized in that: It also includes two perturbations, a third telescopic motor and a fourth telescopic motor, wherein the third telescopic motor and the fourth telescopic motor are electrically connected to the PLC controller respectively; The upper contact plate and the lower contact plate are respectively provided with via holes, each of the via holes corresponds to one of the perturbations, and the perturbations can enter and exit the corresponding via holes; The telescopic shaft of the third telescopic motor and the telescopic shaft of the fourth telescopic motor are respectively connected to one of the perturbations; Antenna connection ports are respectively arranged at the centers of the upper contact plate and the lower contact plate, and the antenna connection ports are suitable for connecting to a network analyzer via a cable.

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