Energy spectrum detector with electromagnetic shielding shell

Abstract

The present invention discloses an energy spectrum detector with an electromagnetic shielding shell, comprising a detector body and an electromagnetic shielding shell, wherein the electromagnetic shielding shell is a shielding shell with an installation cavity inside and an opening at one end, an end cover sealedly connected to the electromagnetic shielding shell is provided at the open end of the electromagnetic shielding shell, and a connecting plug for electrically connecting to an external power supply is provided on the end cover; the detector body is suspended and fixed in the installation cavity, a PCB board with multiple electronic components is provided on one side of the detector body, an electromagnetic shielding board is installed on the PCB board, and a zero-ohm resistor is provided on the electromagnetic shielding board; the zero-ohm resistor of the electromagnetic shielding board and the connecting plug, and the detector body and the connecting plug are electrically connected through wires.

Description

Technical Field

[0001] The invention relates to the field of nuclear radiation detection equipment, and in particular to an energy spectrum detector with an electromagnetic shielding shell. Background Art

[0002] With the development and expansion of nuclear radiation detection technology, the use of precision nuclear radiation detection technology has gradually deepened. Among them, gamma spectrum detection technology has gradually moved from the laboratory to practical application and has been installed on vehicles, drones, and detection doors.

[0003] Energy spectrum detector is a kind of nuclear radiation detection device, which is mainly used to analyze and detect elements in the environment. It includes energy spectrum probe. There are many sensitive components on the energy spectrum probe. The sensitive components are easily affected by the complex electromagnetic environment, resulting in inaccurate energy spectrum results, wrong nuclide identification, inaccurate gamma dose rate and other faults, and even affected by static electricity, resulting in equipment damage. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide an energy spectrum detector with an electromagnetic shielding shell.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A spectrum detector with an electromagnetic shielding shell comprises a detector body and the electromagnetic shielding shell, wherein the electromagnetic shielding shell is a shielding shell having an installation cavity inside and an opening at one end, an end cover sealedly connected to the electromagnetic shielding shell is provided at the open end of the shell, and a connecting plug for electrically connecting to an external power supply is provided on the end cover; the detector body is suspended and fixed in the installation cavity, a PCB board with multiple electronic components is provided on one side of the detector body, an electromagnetic shielding board is installed on the PCB board, and a zero-ohm resistor is provided on the electromagnetic shielding board; the zero-ohm resistor of the electromagnetic shielding board and the connecting plug, and the detector body and the connecting plug are electrically connected through wires.

[0007] Furthermore, the electromagnetic shielding shell is made of anodized aluminum composite plate and is circular.

[0008] Furthermore, a shielding grounding cylinder is sleeved on the detector body, and the end of the shielding grounding cylinder is detachably connected to the inner side of the end cover. The shielding grounding cylinder is cylindrical, and a threading hole is provided on the shielding grounding cylinder for threading the electromagnetic shielding plate and the PCB board. Specifically, there are two threading holes, which are arranged up and down, one corresponding to the electromagnetic shielding plate, and the other corresponding to the lower end surface of the PCB board.

[0009] Furthermore, a protrusion is provided on one side of the end cover close to the shielding grounding tube. One end of the shielding grounding tube is sleeved on the detector body, and the other end is sleeved on the protrusion of the end cover, and is connected and fixed to the protrusion by a fastener.

[0010] Furthermore, a step is provided on one side of the shielding grounding tube close to the end cover, a conductive rubber ring is sleeved on the step, a nested ring tightly fitting with the step is also sleeved on the outside of the conductive rubber ring and on the step, and a connecting plate is provided at one end of the nested ring close to the end cover, the connecting plate is tightly attached to the inner side of the end cover, and is connected and fixed by multiple fasteners.

[0011] Furthermore, a shock-absorbing sleeve is sleeved on the shielding grounding cylinder.

[0012] Furthermore, two brackets are spaced apart at the lower end of the electromagnetic shielding shell, and the brackets include a bottom plate, a vertical plate is provided on the bottom plate, the middle of the vertical plate has an arc-shaped supporting opening that matches the lower end of the electromagnetic shielding shell, and a shock absorber with the lower end extending out of the bottom plate is installed on both sides of the bottom plate.

[0013] Furthermore, a fixed block with an assembly tube in the middle is provided at a corresponding position of each shock absorber on the bottom plate, a fastener with a thread at the lower end is provided on the fixed block, a spring is sleeved on the fastener with the upper end connected to it and the lower end is placed in the assembly tube, the lower end of the fastener passes through the fixed block and the shock absorber, and is threadedly connected to the shock absorber, and the end extends out of the shock absorber for being fastened to a carrier for installing the energy spectrum detector.

[0014] Furthermore, a horizontally arranged mounting ring is provided in the middle of the shock absorber, and a mounting hole for assembling the shock absorber is provided on both the left and right sides of the base plate. The mounting hole is a stepped hole with a large diameter at the upper end and a small diameter at the lower end, and the mounting ring of the shock absorber cooperates with the lower end of the stepped hole.

[0015] Furthermore, the fastener includes a screw and a knob, the lower end of the knob is fixedly sleeved with the assembly tube, a vertical through hole matching the screw is provided in the middle of the knob, the upper end of the screw is sleeved in the vertical through hole and fixedly connected to the knob by a screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the split structure of the energy spectrum detector in the embodiment;

[0017] Figure 2 Schematic diagram of the three-dimensional structure of the energy spectrum detector in the embodiment;

[0018] Figure 3 This is a schematic diagram of the installation structure of the detector body and the electromagnetic shielding plate in the embodiment;

[0019] Figure 4This is a schematic diagram of the installation structure of the detector body and the end cover in the embodiment;

[0020] Figure 5 Schematic diagram of the assembly structure of the shock-absorbing sleeve in the embodiment. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0022] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1-Figure 5As shown, the energy spectrum detector with an electromagnetic shielding shell provided in this embodiment includes a detector body 1 and an electromagnetic shielding shell 7, wherein the electromagnetic shielding shell 7 is a shielding shell having an installation cavity inside and an opening at one end thereof, an end cover 6 sealedly connected to the electromagnetic shielding shell 7 is provided at the open end thereof, and a connecting plug 61 for electrically connecting to an external power supply is provided on the end cover 6 (specifically, the connecting plug selected in this embodiment is an EMC aviation socket, which is a metal socket and has good sealing performance); the detector body 1 is suspended and fixed in the installation cavity, a PCB board 11 with multiple electronic components is provided on one side of the detector body 1, an electromagnetic shielding plate 2 is installed on the PCB board 11, and a zero-ohm resistor is provided on the electromagnetic shielding plate 2; the zero-ohm resistor of the electromagnetic shielding plate 2 and the connecting plug 61, and the detector body 1 and the connecting plug 61 are electrically connected through wires. The electromagnetic shielding shell and end cover seal the detector body inside. At the same time, the PCB board of the detector body is connected to an electromagnetic shielding plate through a board-to-board connector, thereby forming a fully closed anti-interference environment for the detector, effectively shielding the detector from electromagnetic interference from the external power supply and the installation environment after installation. The shielding plate mainly handles noise on the communication and power supply circuits; after the zero-ohm resistor on the electromagnetic shielding plate is electrically connected to the connecting plug, it is electrically connected to the external power supply through the connecting plug, and grounding is achieved through the external power supply, thereby achieving the purpose of power supply isolation and communication isolation. Due to the connection between the electromagnetic shielding shell and the end cover, after the connecting plug is electrically connected to the electromagnetic shielding plate and grounding is achieved, the electromagnetic shielding shell is also grounded, and together with the end cover, a Faraday cage is formed to effectively shield power supply interference and space interference.

[0024] After adopting the energy spectrum detector in the present embodiment, the detected background count is reduced from tens of thousands to 150~200, which is a normal background level. After testing, the excessive detection value is caused by interference caused by the space environment and power supply. The upper installation environment is an unmanned patrol device. The motors, radio stations, etc. carried by it are all devices with strong external electromagnetic interference. The energy spectrum detector is a sensitive device inside, which is very sensitive to power supply interference and environmental electromagnetic interference, and will interfere with its detection performance. After carrying the designed electromagnetic shielding shell and electromagnetic shielding plate, when the upper installation equipment is working at full power, the detection background of the detector is still at a normal level. Through a series of treatments, the anti-interference ability of the energy spectrum detector is greatly enhanced, and the collected environmental energy spectrum is clean and stable.

[0025] In order to achieve a better shielding effect of the shielding shell and ensure the conductive efficiency (the conductive efficiency here refers to the overall conductive efficiency of the energy spectrum detector, and the charges on the metal are connected to form a closed and seamless magnetic field cage), the electromagnetic shielding shell 7 is made of anodized aluminum composite plate and is circular (anodization is used because the surface of the probe itself is conductive, and its grounding is the signal ground, which is not at the same reference potential as the power ground. In order to prevent the probe surface from contacting the electromagnetic shielding shell, causing the magnetic field constructed using the shell to be disordered, surface anodized insulation treatment is used).

[0026] Furthermore, a shielding grounding cylinder 3 is sleeved on the detector body 1, and the end of the shielding grounding cylinder 3 is detachably connected to the inner side of the end cover 6. The shielding grounding cylinder 3 is cylindrical, and a threading port 31 for threading the electromagnetic shielding plate and the PCB board is provided on the shielding grounding cylinder 3. A protrusion 62 is provided on the side of the end cover 6 close to the shielding grounding cylinder 3. One end of the shielding grounding cylinder 3 is sleeved on the detector body 1, and the other end is sleeved on the protrusion 62 of the end cover, and is connected and fixed to the protrusion 62 by fasteners. The shielding grounding cylinder provided can further improve the shielding of the detector body. At the same time, the detector body can be installed and fixed in the electromagnetic shielding shell through the shielding grounding cylinder. Fasteners are used for fixing during installation, and the fixing structure is stable and not easy to loosen. At the same time, it is also convenient for installation and disassembly. In the specific setting, a plurality of mounting holes are circumferentially provided on the protrusion, and a plurality of connection holes corresponding to the mounting holes are circumferentially provided on the connection end of the shielding grounding cylinder. The threading port provided on the electromagnetic shielding plate can be used to thread the connecting wires of the electromagnetic shielding plate and the PCB board. The use of a shielded grounding tube can effectively improve the structural stability and shielding effect; without the shielded grounding tube, the overall design can also achieve the purpose, but the stability is slightly worse when the entire system is running at full power.

[0027] like Figure 1 As shown, the specific connection structure of the shielding grounding cylinder and the end cover is as follows: a step 32 is provided on the side of the shielding grounding cylinder 3 close to the end cover 6, a conductive rubber ring 4 is sleeved on the step 32, and a nesting ring 5 that is tightly matched with the step 32 is also sleeved on the outside of the conductive rubber ring 4 and on the step 32, and a connecting plate 51 is provided at the end of the nesting ring 5 close to the end cover 6, and the connecting plate 51 is tightly attached to the inner side of the end cover 6 and is connected and fixed by multiple fasteners. The provided conductive rubber ring can effectively increase the sealing of the nesting ring and the shielding grounding cylinder after being sleeved, and after the nesting ring added to the shielding grounding cylinder is connected to the end cover, the stability and sealing of the connection between the shielding grounding cylinder and the end cover can be further increased.

[0028] Furthermore, a shock-absorbing sleeve 8 is sleeved on the shielding grounding tube 3. The sleeve is made of sponge and has certain flexibility and elasticity as a whole. The sleeve can absorb shock to the grounding tube and the detector body inside the grounding tube during use.

[0029] Furthermore, two brackets 9 are provided at intervals at the lower end of the electromagnetic shielding shell 1, and the bracket 9 includes a bottom plate 91, a vertical plate is provided on the bottom plate 91, and an arc-shaped support opening 912 is provided in the middle of the vertical plate to match the lower end of the electromagnetic shielding shell, and a shock absorber 10 with a lower end extending out of the bottom plate is installed on both sides of the bottom plate 91. The bracket provided can support the electromagnetic shielding shell, and at the same time, the shock absorber provided on the bracket can further improve the shock absorption performance of the detection device.

[0030] Furthermore, a fixed block 92 having an assembly tube 921 in the middle is provided at the corresponding position of each shock absorber 10 on the bottom plate 91, and a fastener 93 having a threaded lower end is provided on the fixed block 92. A spring 94 is sleeved on the fastener 93, and the upper end is connected to the fastener 93, and the lower end is placed in the assembly tube 921. After the lower end of the fastener 93 passes through the fixed block 92 and the shock absorber 10, it is threadedly connected to the shock absorber 10, and the end extends out of the shock absorber 10, and is used to be fastened to the carrier on which the energy spectrum detector is installed (specifically, the carrier can be a chassis of a detection vehicle, a drone, or a detection door). The fastener provided can further fix the shock absorber, and at the same time, the fastener can also be used to fasten the carrier, and the energy spectrum detector is fixedly installed on the carrier. The spring provided on the screw can further form a shock absorption for the electromagnetic shielding shell. The shock absorber is fixed under the bracket and can contact the vibration source; the electromagnetic shielding shell is fixed on the bracket, thereby isolating the vibration source to play a shock absorption role.

[0031] Furthermore, a horizontally arranged mounting ring 101 is provided in the middle of the shock absorber 10, and a mounting hole 911 for mounting the shock absorber 10 is provided on both the left and right sides of the bottom plate 91. The mounting hole 911 is a stepped hole with a large diameter at the upper end and a small diameter at the lower end, and the mounting ring 101 of the shock absorber 10 is matched with the lower end of the stepped hole. With the above structure, the shock absorber is easy to assemble and disassemble.

[0032] Furthermore, the fastener 93 includes a screw and a knob (not numbered in the figure), the lower end of the knob is fixedly sleeved with the assembly tube, a vertical through hole matching the screw is provided in the middle of the knob, the upper end of the screw is sleeved in the vertical through hole and fixedly connected to the knob by a screw.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. An energy spectrum detector with an electromagnetic shielding shell, comprising a detector body, characterized in that: It also includes an electromagnetic shielding shell, which is a shielding shell with an installation cavity inside and an opening at one end. An end cover sealed and connected to the electromagnetic shielding shell is provided at the open end of the electromagnetic shielding shell, and a connecting plug for electrically connecting to an external power supply is provided on the end cover; the detector body is suspended and fixed in the installation cavity, a PCB board with multiple electronic components is provided on one side of the detector body, an electromagnetic shielding plate is installed on the PCB board, and a zero-ohm resistor is provided on the electromagnetic shielding plate; the zero-ohm resistor of the electromagnetic shielding plate and the connecting plug, and the detector body and the connecting plug are electrically connected through wires; a shielding grounding cylinder with one end detachably connected to the inner side of the end cover is sleeved on the detector body, the shielding grounding cylinder is cylindrical, and a threading port for threading the electromagnetic shielding plate and the PCB board is provided on the shielding grounding cylinder; a protrusion is provided on one side of the end cover close to the shielding grounding cylinder, one end of the shielding grounding cylinder is sleeved on the detector body, and the other end is sleeved on the protrusion of the end cover, and is connected and fixed to the protrusion by fasteners.

2. The energy spectrum detector with electromagnetic shielding shell according to claim 1, characterized in that: The electromagnetic shielding shell is made of anodized aluminum composite plate and is circular.

3. The energy spectrum detector with an electromagnetic shielding shell according to claim 1 or 2, characterized in that: A step is provided on one side of the shielding grounding tube close to the end cover, on which a conductive rubber ring is sleeved, and on the outside of the conductive rubber ring and on the step, a nested ring tightly fitting with the step is also sleeved, and a connecting plate is provided at one end of the nested ring close to the end cover, the connecting plate is tightly attached to the inner side of the end cover, and is connected and fixed by a plurality of fasteners.

4. The energy spectrum detector with electromagnetic shielding shell according to claim 3, characterized in that: A shock-absorbing sleeve is also placed on the shielding grounding tube.

5. The energy spectrum detector with an electromagnetic shielding shell according to claim 1, 2 or 4, characterized in that: Two brackets are spaced apart at the lower end of the electromagnetic shielding shell, and the brackets include a bottom plate, a vertical plate is provided on the bottom plate, and an arc-shaped supporting opening is provided in the middle of the vertical plate to match the lower end of the electromagnetic shielding shell. A shock absorber with the lower end extending out of the bottom plate is installed on both sides of the bottom plate.

6. The energy spectrum detector with electromagnetic shielding shell according to claim 5, characterized in that: A fixing block with an assembly tube in the middle is provided at a corresponding position of each shock absorber on the bottom plate, a fastener with a thread at the lower end is provided on the fixing block, a spring is sleeved on the fastener with the upper end connected thereto and the lower end placed in the assembly tube, the lower end of the fastener passes through the fixing block and the shock absorber, and is threadedly connected to the shock absorber, and the distal end extends out of the shock absorber for being fastened to a carrier for installing the energy spectrum detector.

7. The energy spectrum detector with an electromagnetic shielding shell according to claim 6, characterized in that: A horizontally arranged mounting ring is provided in the middle of the shock absorber, and a mounting hole for assembling the shock absorber is provided on both the left and right sides of the base plate. The mounting hole is a stepped hole with a large diameter at the upper end and a small diameter at the lower end. The mounting ring of the shock absorber cooperates with the lower end of the stepped hole.

8. The energy spectrum detector with an electromagnetic shielding shell according to claim 6 or 7, characterized in that: The fastener comprises a screw rod and a knob. The lower end of the knob is sleeved and fixed with the assembly tube. A vertical through hole matching with the screw rod is provided in the middle of the knob. The upper end of the screw rod is sleeved in the vertical through hole and fixedly connected with the knob by a screw.

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