Fixing structure, mounting method and detection system

Abstract

The invention discloses a fixing structure, the fixing structure is used for installing a photomultiplier in a detection system, the fixing structure comprises an angle adjusting assembly, a translation adjusting assembly and a focusing assembly, the photomultiplier is rotatably connected with the angle adjusting assembly, and the angle adjusting assembly is rotatably connected with the translation adjusting assembly. The incident angle of the light on the light sensing surface of the photomultiplier is adjusted; the photomultiplier is fixedly connected with the translation adjusting assembly through the angle adjusting assembly, and the photomultiplier moves in the axis direction of the photomultiplier under the action of the translation adjusting assembly; the translation adjusting assembly is fixedly connected with the focusing assembly, and the focusing assembly enables the photomultiplier to be close to or away from the light source so as to adjust the focusing effect of the light on the light sensing surface. The fixing structure has the beneficial effects that the focusing assembly, the angle adjusting assembly and the translation adjusting assembly are arranged in the fixing structure, so that multi-dimensional adjustment of the posture of the photomultiplier tube when the photomultiplier tube is mounted in a light path can be realized.

Description

Technical Field

[0001] The present invention relates to the field of photoelectric conversion technology, and in particular to a fixing structure, an installation method and a detection system. Background Art

[0002] Photomultiplier tube (PMT) is a vacuum electronic device that uses the photoelectric effect to convert weak light signals into electrical signals. Due to its high sensitivity, fast time response, low noise, high frequency and high gain, PMT is widely used in the fields of home appliance development, astronomical detection, chemical industry, medical treatment, semiconductor and space detection. The PMT in the related art uses a standard package fixed structure. When the PMT is installed in the optical path, its posture is relatively fixed, and it cannot be adjusted in multiple dimensions, which is not convenient for adjustment and installation. Summary of the invention

[0003] In order to solve the above problems, an object of the present invention is to provide a fixing structure and an installation method thereof.

[0004] In one aspect, the present invention provides a fixing structure for installing a photomultiplier tube in a detection system, wherein the fixing structure comprises an angle adjustment component, a translation adjustment component and a focusing component.

[0005] The photomultiplier tube is rotatably connected to the angle adjustment component, and the angle adjustment component is configured to adjust the incident angle of light on the photosensitive surface of the photomultiplier tube;

[0006] The photomultiplier tube is configured to be fixedly connected to the translation adjustment assembly through the angle adjustment assembly, and the translation adjustment assembly is configured to make the photomultiplier tube move along its axis direction;

[0007] The translation adjustment component is fixedly connected to the focusing component, and the focusing component is configured to make the photomultiplier tube close to or away from the light source to adjust the focusing effect of the light on the photosensitive surface.

[0008] As a further improvement of the present invention, the angle adjustment assembly includes a first rotating member and a first fixing member.

[0009] The first rotating member is fixedly connected to the photomultiplier tube;

[0010] The first fixing member is rotatably connected to the first rotating member.

[0011] As a further improvement of the present invention, the first rotating member is an annular plate whose inner diameter is matched with the photomultiplier tube, and the annular plate is provided with a plurality of arc grooves along its circumference.

[0012] As a further improvement of the present invention, the annular plate is provided with first scale lines along its circumference, the first scale lines are arranged in an arc shape along the circumference of the annular plate, and the curvature of the arc matches the curvature of the arc groove.

[0013] As a further improvement of the present invention, the translation adjustment assembly includes a bracket and a second fixing member,

[0014] The bracket is fixedly connected to the first fixing member;

[0015] The second fixing member is movably connected to the bracket.

[0016] As a further improvement of the present invention, the portion where the bracket is connected to the second fixing member is provided with a plurality of first strip holes.

[0017] A second scale line is provided on the surface of the portion of the bracket connected to the second fixing member away from the second fixing member, and the length of the second scale line is matched with the length of the first strip-shaped hole.

[0018] As a further improvement of the present invention, the focusing assembly includes a phase adjustment member, a second rotating member and a third rotating member.

[0019] One end of the phase adjustment member is fixedly connected to the second fixing member, and the other end of the phase adjustment member is fixedly connected to the second rotating member;

[0020] The second rotating member is rotatably connected to the outer peripheral surface of the third rotating member, and during the rotation process, the second rotating member drives the phase adjustment member to move forward or backward along the axial direction of the third rotating member.

[0021] As a further improvement of the present invention, at least three phase adjustment holes are provided on the connection surface between the phase adjustment member and the second fixing member, and the intervals between two adjacent phase adjustment holes are the same and / or different.

[0022] As a further improvement of the present invention, the portion where the third rotating member is connected to the second rotating member is provided with a plurality of second strip grooves parallel to the axis direction of the third rotating member;

[0023] The other end of the phase adjustment member extends to the interior of the third rotating member;

[0024] The second rotating member is fixedly connected to the phase adjusting member through the plurality of second strip grooves.

[0025] As a further improvement of the present invention, it further comprises a positioning pin, wherein the positioning pin passes through the second rotating member, the plurality of second strip-shaped grooves and the phase adjusting member in sequence;

[0026] A clamping groove is provided on the inner side surface of the second rotating member, and the end of the positioning pin close to the second rotating member is embedded in the clamping groove.

[0027] As a further improvement of the present invention, it further comprises a clamping assembly, wherein the clamping assembly is connected to the second fixing member;

[0028] One end of the photomultiplier tube away from the first rotating member is located between the clamping assembly and the second fixing member.

[0029] As a further improvement of the present invention, it also includes a lens barrel assembly, which is connected to the third rotating member and is configured to conduct the light and make it incident on the photosensitive surface.

[0030] On the other hand, the present invention provides an installation method based on the above-mentioned fixing structure, the installation method comprising:

[0031] Assembling the photomultiplier tube, the angle adjustment component and the translation adjustment component to obtain a photomultiplier tube assembly;

[0032] Assemble the lens barrel assembly, the focusing assembly and the camera in sequence along the light path direction, adjust the distance between the camera and the light source by the focusing assembly until the imaging of the light source in the camera is optimal, and lock the focusing assembly;

[0033] The camera is removed from the focusing assembly, and the photomultiplier tube assembly is assembled with the focusing assembly, so that the photosensitive surface of the photomultiplier tube faces the lens barrel assembly, and the focusing assembly remains locked during this process;

[0034] The relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked;

[0035] The incident angle of the light on the photosensitive surface is adjusted by the angle adjustment component until the incident angle is 90°, and the angle adjustment component is locked.

[0036] As a further improvement of the present invention, the lens barrel assembly, the focusing assembly and the camera are assembled in sequence along the light path direction, the distance between the camera and the light source is adjusted by the focusing assembly until the imaging of the light source in the camera is optimal, and the focusing assembly is locked, including:

[0037] The end of the lens barrel assembly away from the light source is fixedly connected to the third rotating member;

[0038] The second rotating member is sleeved on the outer circumference of the third rotating member, and the end of the phase adjusting member away from the camera is extended into the interior of the third rotating member, and the positioning pin is sequentially passed through the second rotating member, the third rotating member and the phase adjusting member to fix the second rotating member and the phase adjusting member;

[0039] By rotating the second rotating member to adjust its relative position with the third rotating member, the phase adjustment member is driven to move closer to or farther from the light source along the axis direction of the third rotating member, thereby adjusting the imaging effect of the light source on the camera;

[0040] When the imaging effect is optimal, the second rotating member is locked so that the second rotating member no longer rotates relative to the third rotating member.

[0041] As a further improvement of the present invention, the relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked, including:

[0042] By pulling the bracket, the bracket is moved forward or backward along the first strip hole on the second fixing member, thereby adjusting the irradiation position of the light on the photosensitive surface;

[0043] When the light is irradiated at the center of the photosensitive surface, the bracket is locked so that it no longer moves relative to the second fixing member.

[0044] As a further improvement of the present invention, the angle adjustment component is used to adjust the incident angle of the light on the photosensitive surface until the incident angle is 90°, and the angle adjustment component is locked, including:

[0045] By rotating the first rotating member, the first rotating member is rotated along the arc groove relative to the first fixed member, thereby adjusting the incident angle of the light on the photosensitive surface;

[0046] When the incident angle is 90°, the first rotating member is locked so that it no longer rotates relative to the first fixing member.

[0047] In a third aspect, the present patent also provides a detection system, which includes the fixed structure and photomultiplier tube as described above, and the fixed structure installs the photomultiplier tube in the detection system.

[0048] The beneficial effect of the present invention is that by arranging a focusing component, an angle adjustment component and a translation adjustment component in a fixed structure, multi-dimensional adjustment of the posture of the photomultiplier tube when installed in the optical path can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0050] Figure 1 A schematic diagram of a fixing structure according to an exemplary embodiment of the present invention;

[0051] Figure 2 is a cross-sectional view of a fixing structure according to an exemplary embodiment;

[0052] Figure 3 is a schematic structural diagram of a photomultiplier tube according to an exemplary embodiment;

[0053] Figure 4 It is a structural schematic diagram of a clamping assembly according to an exemplary embodiment;

[0054] Figure 5 is a structural schematic diagram of a phase adjustment member according to an exemplary embodiment;

[0055] Figure 6 is a schematic structural diagram of a third rotating member according to an exemplary embodiment;

[0056] Figure 7 is a schematic structural diagram of a second rotating member according to an exemplary embodiment;

[0057] Figure 8 is a cross-sectional view of a focusing assembly according to an exemplary embodiment;

[0058] Fig. 9 It is a schematic diagram of assembling a camera and a focusing assembly according to an exemplary embodiment;

[0059] Fig.10 The figure is a flow chart of a method for installing a fixed structure according to an exemplary embodiment.

[0060] In the figure,

[0061] 1. Photomultiplier tube; 11. Electric control cover; 12. First flange; 121. First scale line; 122. Arc groove; 13. Hoop; 14. Shielding cover; 141. Light-transmitting groove;

[0062] 2. Clamping assembly; 21. First screw hole; 22. Second screw hole; 23. Third screw hole;

[0063] 3. Second flange;

[0064] 4. Bracket; 41. First strip hole; 42. Second scale line;

[0065] 5. base; 51. connection hole;

[0066] 6. Phase adjustment member; 61. Fourth screw hole; 62. Phase adjustment hole; 63. First external thread; 64. Positioning pin:

[0067] 7. threaded flange; 71. second strip hole; 72. fifth screw hole; 73. second external thread;

[0068] 8. threaded focusing ring; 81. slot; 82. through hole; 83. sixth screw hole;

[0069] 9. lens barrel assembly; 91. third flange; 92. lens barrel;

[0070] 10. Camera. DETAILED DESCRIPTION

[0071] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0073] In addition, in the description of the present invention, the terms used are only for illustrative purposes and are not intended to limit the scope of the present invention. The terms "include" and / or "comprise" are used to specify the existence of the elements, steps, operations and / or components, but do not exclude the existence or addition of one or more other elements, steps, operations and / or components. The terms "first", "second" and the like may be used to describe various elements, do not represent the order, and do not limit these elements. In addition, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two and more than two. These terms are only used to distinguish one element from another element. In conjunction with the following drawings, these and / or other aspects become apparent, and it is easier for a person of ordinary skill in the art to understand the description of the embodiments of the present invention. The accompanying drawings are used to describe the embodiments of the present invention for illustrative purposes only. Those skilled in the art will easily recognize from the following description that, without departing from the principles of the present invention, alternative embodiments of the structures and methods shown in the present invention can be adopted.

[0074] A fixing structure according to an embodiment of the present invention is used to install a photomultiplier tube in a detection system, and the fixing structure includes an angle adjustment component, a translation adjustment component and a focusing component, wherein:

[0075] The photomultiplier tube is rotatably connected to the angle adjustment assembly to adjust the incident angle of light on the photosensitive surface of the photomultiplier tube; the photomultiplier tube is fixedly connected to the translation adjustment assembly through the angle adjustment assembly, and under the action of the translation assembly, the photomultiplier tube moves along its axial direction to adjust the irradiation position of light on the photosensitive surface of the photomultiplier tube; the translation adjustment assembly is fixedly connected to the focusing assembly, and the focusing assembly makes the photomultiplier tube close to or away from the light source to adjust the focusing effect of light on the photosensitive surface.

[0076] For details, see Figure 1-3 The photomultiplier tube 1, for example, includes an electric control cover 11, a first flange 12, a clamp 13 and a shielding cover 14. The electric control cover 11 is arranged at one end of the photomultiplier tube 1 connected to the external circuit, and the other end of the photomultiplier tube 1 is inserted into the shielding cover 14, and the shielding cover 14 is used to block the interfering light in the external environment. A light-transmitting groove 141 is provided on the shielding cover 14 to form the photosensitive surface of the photomultiplier tube 1, and the target light is irradiated into the photomultiplier tube 1 through the light-transmitting groove 141. The clamp 13 is sleeved on the outside of the shielding cover 14, and the shielding cover 14 is connected to the angle adjustment component through the clamp 13, so that the shielding cover 14 is driven to rotate through the angle adjustment component, thereby changing the angle between the light-transmitting groove 141 and the target light.

[0077] The angle adjustment assembly includes, for example, a first rotating member and a first fixed member. The first rotating member is, for example, the first flange 12, and the first fixed member is, for example, the second flange 13. The first flange 12 is provided with a plurality of arc grooves 122 along its circumference, and the second flange 13 is provided with threaded holes corresponding to the plurality of arc grooves 122 along its circumference. By passing the bolts through the corresponding arc grooves 122 and the threaded holes, the connection between the first flange 12 and the second flange 13 can be achieved, thereby connecting the shielding cover 14 to the second flange 13. The first flange 12 can rotate within the arc range of the arc groove 122, thereby driving the shielding cover 14 to rotate within the arc range of the arc groove 122, so as to adjust the angle of the target light irradiated on the light-transmitting groove 141. Preferably, the plurality of arc grooves 122 are evenly arranged along the circumference of the first flange 12, so that the circumferential force of the first flange 12 is uniform. More preferably, first scale lines 121 are provided on the circumference of the first flange 12, and the first scale lines 121 are arranged in an arc shape, for example, along the circumference of the annular plate, that is, the first scale lines 121 are radially pointing to the center of the annular plate, and the curvature of the arc is equal to or slightly larger than the curvature of the arc groove 122. In the process of rotating the first flange 12, the first scale lines 121 can intuitively reflect the rotation angle of the first flange 12, so as to more conveniently and accurately adjust the incident angle of the target light irradiated on the light-transmitting groove 141.

[0078] In an optional embodiment, the translation adjustment assembly includes a bracket 4 and a second fixing member, and the second fixing member is, for example, a base 5. The bracket 4 is fixedly connected to the second flange 13 to achieve the connection between the bracket 4 and the photomultiplier tube 1. The bracket 4 is located on the upper surface of the base 5 and is movably connected to the base 5. Therefore, when the bracket 4 translates along the upper surface of the base 5, the photomultiplier tube 1 can be driven to translate to adjust the specific position of the target light irradiated on the light-transmitting groove 141.

[0079] Preferably, a plurality of first strip holes 41 are provided in the length direction of the bracket 4, and a plurality of threaded holes are provided at positions corresponding to the plurality of first strip holes 41 on the upper surface of the base 5, and the connection between the bracket 4 and the base 5 can be achieved by passing bolts through the first strip holes 41 and the threaded holes in sequence. At the same time, the bracket 4 can move along its length direction within the length range of the first strip holes 41, thereby driving the photomultiplier tube 1 to translate within the length range of the first strip holes 41, and then adjusting the irradiation position of the target light on the light-transmitting groove 141.

[0080] More preferably, a second scale line 42 is provided on the surface of the bracket 4 away from the base 5. For example, a second scale line 42 is provided on the upper surface of the bracket 4, and the length of the second scale line 42 is equal to or slightly greater than the length of the first strip hole 41. The second scale line 42 can intuitively reflect the translation position of the bracket 4 relative to the base 5, and then accurately adjust the relative position between the target light and the light-transmitting groove 141, so as to adjust the incident position of the light in the photomultiplier tube 1.

[0081] The bracket 4 is, for example, an "L" shape rotated 90° counterclockwise, wherein the horizontal side is connected to the upper surface of the base 5, and the vertical side is connected to the third flange 3. Two first strip holes 41 are provided along the length direction of the horizontal side, and second scale lines 42 matching the length of the first strip holes 41 are provided on the upper surface of the horizontal side. When the bracket 4 moves along the length direction of the first strip holes 41, the distance moved by the bracket 4 can be determined according to the second scale lines 42.

[0082] In an optional embodiment, the focusing assembly includes a phase adjustment member, a second rotating member and a third rotating member, one end of the phase adjustment member is fixedly connected to the second fixed member, and the other end of the phase adjustment member is fixedly connected to the second rotating member; the second rotating member is rotatably connected to the outer peripheral surface of the third rotating member, and during the rotation process, the second rotating member drives the phase adjustment member to move forward or backward along the axial direction of the third rotating member.

[0083] Specifically, Figure 5-8 As shown, the second rotating member is, for example, a threaded focusing ring 8, and the third rotating member is, for example, a threaded flange 7. One end of the phase adjusting member 6 is fixedly connected to the base 5 in a detachable connection manner to achieve the connection between the phase adjusting member 6 and the photomultiplier tube 1; the other end of the phase adjusting member 6 is fixedly connected to the threaded focusing ring 8, so that the phase adjusting member 6 moves under the drive of the threaded focusing ring 8. The size of the threaded focusing ring 8 is sleeved on the outside of the threaded flange 7, and the threaded focusing ring 8 is rotatably connected to the threaded flange 7 through the thread. When the threaded focusing ring 8 rotates along the thread direction to approach the threaded flange 7, the photomultiplier tube 1 is driven by the phase adjusting member 6 to approach the light source; when the threaded focusing ring 8 rotates along the thread direction to move away from the threaded flange 7, the photomultiplier tube 1 is driven by the phase adjusting member 6 to move away from the light source. Thereby, the focusing effect of the target light in the photomultiplier tube 1 is adjusted, so that the imaging effect of the target light in the light-transmitting groove 141 is optimal.

[0084] Preferably, the phase adjustment member 6 is an annular shape with a gradient change, for example, the end of the phase adjustment member 6 connected to the base 5 is a first annular shape with a smaller size; the end of the phase adjustment member 6 connected to the threaded focusing ring 8 is a second annular shape with a larger size. It is understandable that Fig. 9As shown, a first external thread 63 is provided on the outer circumference of the first circular ring for connecting with the camera 10. In the process of adjusting the focusing effect of the target light by the focusing assembly, the imaging effect of the target light in the camera 10 can be used for adjustment. When the imaging of the target light in the camera 10 reaches the clearest state, the focusing effect of the target light reaches the best, and the focusing assembly can be locked. A plurality of fourth screw holes 61 are provided on the outer circumference of the second circular ring, and a plurality of through holes 82 are provided at positions corresponding to the threaded focusing ring 8 and the plurality of fourth screw holes 61, so that the connection between the phase adjustment member 6 and the threaded focusing ring 8 is achieved through the cooperation of the positioning pin 64, the plurality of fourth screw holes 61 and the plurality of through holes 82.

[0085] Continue to see Figure 5-8 , a plurality of second strip holes 71 are provided on the portion where the threaded flange 7 is connected to the threaded focus ring 8, and the length direction of the second strip holes 71 is parallel to the central axis of the threaded flange 7. It can be understood that the setting positions of the plurality of second strip holes 71 correspond to the plurality of fourth screw holes 61 and the plurality of through holes 82. Among them, the end portion where the phase adjustment member 6 is connected to the threaded focus ring 8 extends to the inside of the threaded flange 7, so that the positioning pin 64 passes through the through hole 82, the second strip hole 71 and the fourth screw hole 61 in sequence. In this way, not only can the connection between the phase adjustment member 6 and the threaded focus ring 8 be achieved, but also the phase adjustment member 6 can be guided so that the moving direction of the phase adjustment member 6 is parallel to the central axis direction of the threaded flange 7. Among them, the number of the positioning pin 64, the through hole 82, the second strip hole 71 and the fourth screw hole 61 is equal, and the number of the positioning pin 64, the through hole 82, the second strip hole 71 and the fourth screw hole 61 in this embodiment is 4. Optionally, the number is, for example, 3, 4, 5, 6, 7, or 8, etc. It can be determined according to the sizes of the phase adjustment member 6, the threaded flange 7, and the threaded focus ring 8 in use, and the present application does not make any specific limitation thereto.

[0086] Preferably, a slot 81 penetrating the entire inner circumference of the threaded focus ring 8 is provided on the inner side surface thereof, and the end of the positioning pin 64 close to the threaded focus ring 8 (for example, the upper end of the positioning pin 64) is embedded in the slot 81. Thus, when the threaded focus ring 8 rotates relative to the threaded flange 7, the positioning pin 64, under the action of the slot 81, causes the phase adjustment member 6 to move along the length direction of the second strip hole 71 driven by the threaded focus ring 8, and the moving range of the phase adjustment member 6 is the length range of the second strip hole 71. That is, the moving distance of the phase adjustment member 6 approaching or moving away from the light source is consistent with the length of the second strip hole 71.

[0087] More preferably, a plurality of sixth threaded holes 83 are provided on the circumferential side of the threaded focus ring 8. When the focusing assembly completes focusing, the threaded focus ring 8 can be locked by means of the locking screw and the sixth threaded hole 83 to prevent the threaded focus ring 8 from unexpectedly moving and affecting the focusing effect. Optionally, the sixth threaded holes 83 can be provided in 3 groups, 4 groups, 5 groups, 6 groups, 7 groups or 8 groups, etc., each group including 2 sixth threaded holes 83. Multiple groups of sixth threaded holes 83 can be evenly arranged along the circumference of the threaded focus ring 8 so that the threaded focus ring 8 is evenly stressed. The number of the sixth threaded holes 83 can be determined according to demand, and the present application does not specifically limit it.

[0088] In an optional embodiment, at least three phase adjustment holes 62 are provided on the connection surface of the phase adjustment member 6 with the base 5 , and the intervals between two adjacent phase adjustment holes 62 are the same and / or different.

[0089] Specifically, Figure 4-5 As shown, at least three phase adjustment holes 62 are provided on the end surface of the second ring of the phase adjustment member 6 facing the base 5, and a plurality of connection holes 51 are provided at the part where the base 5 is connected to the phase adjustment member. The connection between the phase adjustment member 6 and the base 5 can be achieved through the phase adjustment holes 62 and the connection holes 51. Preferably, the intervals between two adjacent phase adjustment holes 62 are the same, and the interval between two adjacent phase adjustment holes 62 can be adjusted by adjusting the number of the phase adjustment holes 62. For example, when the number of phase adjustment holes 62 is 3, the interval angle between two phase adjustment holes 62 is 120°; when the number of phase adjustment holes 62 is 4, the interval angle between two phase adjustment holes 62 is 90°; when the number of phase adjustment holes 62 is 5, the interval angle between two phase adjustment holes 62 is 72°; when the number of phase adjustment holes 62 is 6, the interval angle between two phase adjustment holes 62 is 60°; when the number of phase adjustment holes 62 is 7, the interval angle between two phase adjustment holes 62 is 51°; when the number of phase adjustment holes 62 is 8, the interval angle between two phase adjustment holes 62 is 45°, and so on, which will not be repeated here. The number of connecting holes 51 is 4, and the phase of the target light entering the photomultiplier tube 1 can be adjusted by controlling the phase adjustment holes 62 corresponding to the 4 connecting holes 51. In use, the number of phase adjustment holes 62 can be set according to the needs of phase adjustment, so as to adjust the incident phase of the target light in the light-transmitting groove 141.

[0090] In an optional embodiment, it further includes a clamping assembly, which is connected to the second fixing member; an end of the photomultiplier tube away from the first rotating member is located between the clamping assembly and the second fixing member.

[0091] Specifically, Figure 1 and Figure 4As shown, the second fixing member is, for example, a base 5, and the clamping assembly 2 is connected to the base 5 to form a cylindrical shape that matches the outer diameter of the shielding cover 14 of the photomultiplier tube 1. The photomultiplier tube 1 is located in the cylindrical shape through the shielding cover 14, so that the clamping assembly 2 further clamps and fixes the photomultiplier tube 1. It can be understood that the side of the base 5 facing the clamping assembly 2 is semi-circular, and the side of the clamping assembly 2 facing the base 5 is semi-circular, and the two semi-circulars together enclose a cylindrical shape that matches the shielding cover 14.

[0092] Further, the clamping assembly 2 is provided with a first screw hole 21 for connecting with the base 5. Preferably, there are 4 first screw holes 21 and they are respectively located at the four corners of the clamping assembly 2. The clamping assembly 2 and the base 5 are connected by passing the screws through the first screw holes 21. Preferably, a plurality of second screw holes 22 are provided at the upper end surface, the lower end surface and the middle position of the clamping assembly 2, and a plurality of spring plungers or rubber plugs respectively pass through the plurality of second screw holes 22 to abut against the outer side surface of the shielding cover 14 to improve the stability of the photomultiplier tube 1. More preferably, a plurality of third screw holes 23 are provided at the middle position of the clamping assembly 2, and the screws, spring plungers or rubber plugs abut against the outer side surface at the middle position of the shielding cover 14 through the plurality of third screw holes 23 to further improve the stability of the photomultiplier tube 1.

[0093] In an optional embodiment, it also includes a lens barrel assembly, which is connected to the third rotating member, and the light is projected onto the photosensitive surface through the lens barrel assembly.

[0094] like Figure 1-2 or Fig. 9 As shown, the lens barrel assembly 9 includes a third flange 91 and a lens barrel 92, wherein the third flange 91 is arranged at one end of the lens barrel 92 away from the light source. The third rotating member is, for example, a threaded flange 7. The lens barrel assembly 9 is connected to the threaded flange 7 through the third flange 91. It can be understood that the end of the threaded flange 7 away from the threaded focusing ring 8 is provided with a plurality of fifth screw holes 72 along its circumferential direction, and the third flange 91 is provided with a plurality of threaded holes at positions corresponding to the plurality of fifth screw holes 72, so that the screws pass through the fifth screw holes 72 and the plurality of threaded holes in sequence to realize the connection between the threaded flange 7 and the lens barrel assembly 9. The target light can be projected into the light-transmitting groove 141 through the lens barrel 92 to reduce the interference of light in the environment.

[0095] A fixed structure described in the present invention comprises a barrel assembly, a focusing assembly and a photomultiplier tube assembly arranged in sequence along the optical path direction, wherein the photomultiplier tube assembly comprises a photomultiplier tube 1, an angle adjustment assembly and a translation adjustment assembly. The barrel assembly is arranged to intersect with the photomultiplier tube, and the light emitted by the light source propagates along the barrel assembly and enters the photomultiplier tube through the light-transmitting groove, converting the light signal into an electrical signal. The focusing assembly is used to adjust the focusing effect of the light in the photomultiplier tube, the angle adjustment is used to adjust the incident angle of the light entering the photomultiplier tube, and the translation assembly is used to adjust the incident position of the light entering the photomultiplier tube. Based on the adjustment of the above-mentioned components, a more accurate signal conversion effect can be obtained.

[0096] like Fig.10 As shown, an installation method based on the above-mentioned fixing structure according to an embodiment of the present invention includes:

[0097] Assemble the photomultiplier tube with the angle adjustment component and the translation adjustment component to obtain a photomultiplier tube assembly; assemble the lens barrel assembly, the focusing assembly and the camera in sequence along the light path direction, adjust the distance between the camera and the light source through the focusing assembly until the imaging of the light source in the camera is optimal, and lock the focusing assembly;

[0098] Remove the camera from the focusing assembly, and then assemble the photomultiplier tube assembly and the focusing assembly, so that the photosensitive surface of the photomultiplier tube faces the lens barrel assembly. During this process, the focusing assembly remains locked;

[0099] The relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked;

[0100] The incident angle of the light on the photosensitive surface is adjusted by the angle adjustment component until the incident angle is 90°, and the angle adjustment component is locked.

[0101] In an optional implementation, the lens barrel assembly, the focusing assembly and the camera are assembled in sequence along the light path direction, the distance between the camera and the light source is adjusted by the focusing assembly until the imaging of the light source in the camera is optimal, and the focusing assembly is locked, including:

[0102] The end of the lens barrel assembly away from the light source is fixedly connected to the third rotating member; the second rotating member is sleeved on the outer circumferential surface of the third rotating member, and then the end of the phase adjustment member away from the camera is extended into the interior of the third rotating member, and the positioning pin passes through the second rotating member, the third rotating member and the phase adjustment member in sequence to fix the second rotating member and the phase adjustment member; the relative position of the second rotating member and the third rotating member is adjusted by rotating the second rotating member, and the phase adjustment member is driven to approach or move away from the light source along the axis direction of the third rotating member, thereby adjusting the imaging effect of the light source on the camera; when the imaging effect is optimal, the second rotating member is locked so that the second rotating member no longer rotates relative to the third rotating member.

[0103] Specifically, as mentioned above, the lens barrel assembly 9 includes a third flange 91 and a lens barrel 92, and the focusing assembly includes a phase adjustment member 6, a second rotating member and a third rotating member, wherein the second rotating member is, for example, a threaded focusing ring 8, and the third rotating member is, for example, a threaded flange 7. First, the lens barrel assembly and the condition assembly are connected through the third flange 91 and the threaded flange 7; secondly, the phase adjustment member 6 and the camera 10 are connected through the first external thread 63; thereafter, the phase adjustment member 6 is driven to approach or move away from the light source along the second strip hole 71 by rotating the threaded focusing ring 8, thereby adjusting the focusing effect of the light in the camera 10 until the imaging of the light in the camera 10 reaches the clearest state; finally, the threaded focusing ring 8 is locked through the sixth screw hole 83 in the circumference of the screw and the threaded focusing ring 8, so that it no longer rotates relative to the threaded flange 7 to maintain the focusing effect.

[0104] In an optional implementation, the relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked, including:

[0105] By pulling the bracket, the bracket is moved forward or backward along the first strip hole on the second fixing member, thereby adjusting the irradiation position of the light on the photosensitive surface; when the light irradiates the center position of the photosensitive surface, the bracket is locked so that it no longer moves relative to the second fixing member.

[0106] Specifically, as mentioned above, the translation adjustment assembly includes a bracket 4 and a second fixing member, and the second fixing member is, for example, a base 5. First, the bracket 4 and the base 5 can be pre-fixed by screws and the first strip hole 41, so that the bracket 4 can move relative to the base 5; then, the bracket 4 is pulled to move away from or close to the lens barrel assembly 9 along the length direction of the first strip hole 41 to adjust the irradiation position of the light on the photomultiplier tube 1. For example, when the light is irradiated at the center position of the light-transmitting groove 141, the screw in the first strip hole 41 is tightened to lock the bracket 4, so that the bracket 4 can no longer move relative to the base 5.

[0107] In an optional implementation, adjusting the incident angle of light on the photosensitive surface by an angle adjustment component until the incident angle is 90°, and locking the angle adjustment component includes:

[0108] By rotating the first rotating member, the first rotating member rotates along the arc groove relative to the first fixed member, thereby adjusting the incident angle of light on the photosensitive surface; when the incident angle is 90°, the first rotating member is locked so that it no longer rotates relative to the first fixed member.

[0109] Specifically, as mentioned above, the angle adjustment assembly includes a first flange 12 and a second flange 3. First, the first flange 12 and the second flange 3 are pre-installed by screws and arc grooves 122, so that the first flange 12 can rotate relative to the second flange 3; then, the shielding cover 14 is driven to rotate by rotating the first flange 12, thereby adjusting the incident angle of light irradiated to the photomultiplier tube 1. For example, when light is irradiated vertically to the light-transmitting groove 141, the screws in the arc groove 122 are tightened to lock the first flange 12 so that it no longer rotates relative to the second flange 3.

[0110] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0111] Furthermore, persons of ordinary skill in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0112] It will be appreciated by those skilled in the art that, although the present invention has been described with reference to exemplary embodiments, various changes may be made and its elements may be replaced with equivalents without departing from the scope of the present invention. In addition, many modifications may be made to adapt specific situations or materials to the teachings of the present invention without departing from the essential scope of the present invention.

Claims

1. A fixing structure for mounting a photomultiplier tube in a detection system, characterized in that: The fixed structure includes an angle adjustment component, a translation adjustment component and a focusing component. The photomultiplier tube is rotatably connected to the angle adjustment assembly, and the angle adjustment assembly is configured to adjust the incident angle of light on the photosensitive surface of the photomultiplier tube; The photomultiplier tube is configured to be fixedly connected to the translation adjustment assembly through the angle adjustment assembly, and the translation adjustment assembly is configured to make the photomultiplier tube move along its axis direction; The translation adjustment component is fixedly connected to the focusing component, and the focusing component is configured to make the photomultiplier tube close to or away from the light source to adjust the focusing effect of the light on the photosensitive surface.

2. The fixing structure according to claim 1, characterized in that: The angle adjustment assembly includes a first rotating member and a first fixing member. The first rotating member is fixedly connected to the photomultiplier tube; The first fixing member is rotatably connected to the first rotating member.

3. The fixing structure according to claim 2, characterized in that: The first rotating member is an annular plate whose inner diameter is matched with the photomultiplier tube, and the annular plate is provided with a plurality of arc grooves along its circumference.

4. The fixing structure according to claim 3, characterized in that: The annular plate is provided with first scale lines along its circumference, and the first scale lines are arranged in an arc shape along the circumference of the annular plate, and the curvature of the arc is matched with the curvature of the arc groove.

5. The fixing structure according to claim 2, characterized in that: The translation adjustment assembly includes a bracket and a second fixing member, The bracket is fixedly connected to the first fixing member; The second fixing member is movably connected to the bracket.

6. The fixing structure according to claim 5, characterized in that: The portion where the bracket is connected to the second fixing member is provided with a plurality of first strip-shaped holes, A second scale line is provided on the surface of the portion of the bracket connected to the second fixing member away from the second fixing member, and the length of the second scale line is matched with the length of the first strip-shaped hole.

7. The fixing structure according to claim 5, characterized in that: The focusing assembly includes a phase adjustment member, a second rotating member and a third rotating member. One end of the phase adjustment member is fixedly connected to the second fixing member, and the other end of the phase adjustment member is fixedly connected to the second rotating member; The second rotating member is rotatably connected to the outer peripheral surface of the third rotating member, and during the rotation process, the second rotating member drives the phase adjustment member to move forward or backward along the axial direction of the third rotating member.

8. The fixing structure according to claim 7, characterized in that: At least three phase adjustment holes are arranged on the connection surface between the phase adjustment member and the second fixing member, and the intervals between two adjacent phase adjustment holes are the same and / or different.

9. The fixing structure according to claim 7, characterized in that: The portion where the third rotating member is connected to the second rotating member is provided with a plurality of second strip grooves parallel to the axis direction of the third rotating member; The other end of the phase adjustment member extends to the interior of the third rotating member; The second rotating member is fixedly connected to the phase adjusting member through the plurality of second strip grooves.

10. The fixing structure according to claim 9, characterized in that: It also includes a positioning pin, which passes through the second rotating member, the plurality of second strip-shaped grooves and the phase adjusting member in sequence; A clamping groove is provided on the inner side surface of the second rotating member, and the end of the positioning pin close to the second rotating member is embedded in the clamping groove.

11. The fixing structure according to claim 5, characterized in that: Also included is a clamping assembly, the clamping assembly being connected to the second fixing member; One end of the photomultiplier tube away from the first rotating member is located between the clamping assembly and the second fixing member.

12. The fixing structure according to claim 7, characterized in that: It also includes a lens barrel assembly, which is connected to the third rotating member and is configured to transmit the light and make it incident on the photosensitive surface.

13. A method for installing a fixed structure according to any one of claims 1 to 12, characterized in that: The installation method comprises: Assembling the photomultiplier tube, the angle adjustment component and the translation adjustment component to obtain a photomultiplier tube assembly; Assemble the lens barrel assembly, the focusing assembly and the camera in sequence along the light path direction, adjust the distance between the camera and the light source by the focusing assembly until the imaging of the light source in the camera is optimal, and lock the focusing assembly; The camera is removed from the focusing assembly, and the photomultiplier tube assembly is assembled with the focusing assembly, so that the photosensitive surface of the photomultiplier tube faces the lens barrel assembly, and the focusing assembly remains locked during this process; The relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked; The incident angle of the light on the photosensitive surface is adjusted by the angle adjustment component until the incident angle is 90°, and the angle adjustment component is locked.

14. The installation method according to claim 13, characterized in that: The lens barrel assembly, the focusing assembly and the camera are assembled in sequence along the light path direction, the distance between the camera and the light source is adjusted by the focusing assembly until the imaging of the light source in the camera is optimal, and the focusing assembly is locked, including: The end of the lens barrel assembly away from the light source is fixedly connected to the third rotating member; The second rotating member is sleeved on the outer circumference of the third rotating member, and the end of the phase adjusting member away from the camera is extended into the interior of the third rotating member, and the positioning pin is sequentially passed through the second rotating member, the third rotating member and the phase adjusting member to fix the second rotating member and the phase adjusting member; By rotating the second rotating member to adjust its relative position with the third rotating member, the phase adjustment member is driven to move closer to or farther from the light source along the axis direction of the third rotating member, thereby adjusting the imaging effect of the light source on the camera; When the imaging effect is optimal, the second rotating member is locked so that the second rotating member no longer rotates relative to the third rotating member.

15. The installation method according to claim 13, characterized in that: The relative position of the lens barrel assembly and the photosensitive surface is adjusted by the translation adjustment assembly until the light emitted by the light source irradiates the center position of the photosensitive surface, and the translation adjustment assembly is locked, including: By pulling the bracket, the bracket is moved forward or backward along the first strip hole on the second fixing member, thereby adjusting the irradiation position of the light on the photosensitive surface; When the light is irradiated at the center of the photosensitive surface, the bracket is locked so that it no longer moves relative to the second fixing member.

16. The installation method according to claim 13, characterized in that: The angle adjustment component is used to adjust the incident angle of the light on the photosensitive surface until the incident angle is 90°, and the angle adjustment component is locked, including: By rotating the first rotating member, the first rotating member is rotated along the arc groove relative to the first fixed member, thereby adjusting the incident angle of the light on the photosensitive surface; When the incident angle is 90°, the first rotating member is locked so that it no longer rotates relative to the first fixing member.

17. A detection system, characterized in that: include: Photomultiplier tube; The fixing structure according to any one of claims 1 to 12, wherein the fixing structure mounts the photomultiplier tube in the detection system.

Images