CN220491046U - Hand-held type nuclide identification appearance - Google Patents

Abstract

The utility model discloses a handheld nuclide identifier, which relates to the technical field of nuclide identification and comprises a shell, a detector module and a circuit board; the shell comprises an upper shell and a lower shell, and the lower shell is detachably combined with the upper shell to form a cavity; the detector module comprises a lanthanum bromide crystal and an SiPM plate, wherein the lanthanum bromide crystal is positioned on one side of the SiPM plate; the SiPM plate is coupled with the light emergent surface of the lanthanum bromide crystal so as to convert the optical signal into an electric signal; the circuit board comprises a main board, a core board and a plurality of boards, wherein the main board is accommodated in the cavity and positioned between the upper shell and the lower shell, and the core board is arranged on one side of the main board, which is close to the lower shell. The utility model can rapidly position, identify and measure the intensity of the radionuclide and can give out the measuring result of the dosage rate by reasonably arranging and compactly designing the hand-held nuclide identifier with small volume, high sensitivity and light weight.

Description

Hand-held type nuclide identification appearance

Technical Field

The utility model relates to the technical field of nuclide identification, in particular to a handheld nuclide identification instrument.

Background

The hand-held nuclide identifier is mainly used for radionuclide inspection, dose rate monitoring, radioactive source positioning, nuclear spectrum acquisition and nuclide identification, and when the environment and radioactive abnormality in the effluent are found, the hand-held nuclide identifier is used for quickly positioning, quickly identifying and measuring intensity of the radionuclide on the suspicious part and can give out a dose rate measurement result.

The existing nuclide identifier generally comprises a radiation measurement module, a high-voltage power supply circuit, a photomultiplier, a power supply module and the like, wherein the high-voltage power supply circuit is poor in isolation from a circuit board, and the power supply circuit has interference influence on an electronic signal circuit; secondly, the photomultiplier is used for converting weak light signals into electric signals and mainly comprises a photocathode, an electron optical input system, an electron multiplication system and an anode, and the structural size is relatively large, so that the inner space of a shell of the nuclide identifier is occupied; the high-voltage module is used for providing power for the photomultiplier after boosting, and the occupied space is large; and the internal module layout of the existing nuclide identifier equipment is dispersed, so that the occupied space is large, the equipment is large in size and heavy in weight, and the handheld holding feeling is uncomfortable.

Disclosure of Invention

In view of the above, the present utility model provides a handheld nuclide identifier to solve the technical problems of heavy equipment, poor signal integrity of the acquisition signal module, and poor comfort of holding by the hand of the equipment caused by improper layout of the existing nuclide identifier.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: a hand-held nuclide identifier comprises a shell, a detector module for converting detected gamma rays into optical signals and a circuit board for executing nuclide identification;

the shell comprises an upper shell and a lower shell, and the lower shell is detachably combined with the upper shell to form a cavity;

the detector module includes a lanthanum bromide crystal and a SiPM plate contained in the cavity, the lanthanum bromide crystal being located on one side of the SiPM plate;

the SiPM plate is coupled with the light-emitting surface of the lanthanum bromide crystal so as to convert optical signals into electric signals;

the circuit board comprises a main board, a core board and a plurality of boards,

the main board is accommodated in the cavity and positioned between the upper shell and the lower shell, the core board is arranged on one side of the main board, which is close to the lower shell, and the multi-channel board is suitable for being vertically connected between the upper shell and the lower shell.

Optionally, the circuit board is further integrally provided with a power module, and the power module is electrically connected with the motherboard.

Optionally, a preamplifier, an FPGA device, an ARM device and an ADC device are integrally arranged on the multi-channel board;

the pre-amplifier is connected with the SiPM board, the FPGA device is connected with the ARM device, and the FPGA device is electrically connected with the ADC device.

Optionally, the FPGA device further comprises a core board, wherein the core board is electrically connected with the FPGA device, and the model of the core board is OKMX6UL-C2.

Optionally, the portable electronic device further comprises a key module arranged on the upper shell, wherein the key module is electrically connected with the main board through an FPC wire, and the key module is used for providing control signals for the core board.

Optionally, the device further comprises a liquid crystal panel arranged on the upper shell, and the liquid crystal panel is electrically connected with the core board and the main board.

Optionally, the power module comprises a battery compartment arranged on the shell, a detachable battery in the battery compartment, a wireless charging device and a Type C interface device;

the power module is arranged on the right lower side of the circuit board, and is connected with the signal processing module.

Optionally, the upper casing is connected with the lower casing by a bolt, a first connecting hole is formed in the lower casing, a corresponding second connecting hole is formed in a position, opposite to the lower casing, of the upper casing, and the bolt is suitable for connecting the upper casing with the lower casing in a sealing contact manner through the first connecting hole and the second connecting hole.

Optionally, the core board is of the type OKMX6UL-C2.

Compared with the prior art, the utility model has at least the following beneficial effects:

the handheld nuclide identifier comprises a shell, a detector module and a circuit board, wherein the shell comprises an upper shell and a lower shell which form a cavity capable of being combined in a detachable mode, and an SiPM plate in the cavity is coupled with a light emitting surface of a lanthanum bromide crystal so as to convert an optical signal into an electrical signal; the detector module is used for converting the detected gamma rays into optical signals; the circuit board comprises a main board, a core board and a plurality of boards, wherein the main board is accommodated in the cavity and positioned between the upper shell and the lower shell, the core board is arranged on one side of the main board, which is close to the lower shell, the plurality of boards are suitable for being vertically connected between the upper shell and the lower shell, the plurality of boards are used for providing bias voltage for the SiPM board, amplifying signals output by the SiPM board, carrying out analog-digital conversion and then entering the FPGA device to complete energy spectrum acquisition, and compared with the traditional use of the amplifying circuit, the plurality of boards adopt a digital alternative traditional simulation method, do not need a forming amplifying circuit and a peak saturation circuit, and actually reduce the volume of the whole shell; the core board is used for calculating the energy spectrum data of the FPGA device so as to identify nuclides, and the liquid crystal display panel is controlled to display according to logic defined by keys.

Drawings

FIG. 1 is a schematic diagram of an exploded view of a hand-held nuclide identifier in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another direction exploded view of a handheld nuclear species identifier according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram showing a front view of the upper housing according to an embodiment of the present utility model;

FIG. 4 is a schematic rear view of the upper housing in accordance with an embodiment of the present utility model;

FIG. 5 is a schematic diagram showing a front view of the lower housing according to the embodiment of the present utility model;

FIG. 6 is a schematic rear view of the lower housing according to the embodiment of the present utility model;

fig. 7 is a schematic diagram of an assembly structure of a main board, a core board and an upper housing according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of an assembly structure of a multi-channel board, a power module and an upper housing according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram showing an assembly structure of a detector module and a lower housing according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of a motherboard in an embodiment of the present utility model.

Reference numerals illustrate:

1-a housing;

11-an upper housing; 111-second connection holes; 12-a lower housing; 121-a first connection hole;

2-a detector module;

21-lanthanum bromide crystals; 22-SiPM plates;

3-a circuit board;

31-a main board; 32-core plate; 33-multichannel plate; 34-a power module;

4-liquid crystal panel.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

To solve the above problems, fig. 1 to 10 show a handheld nuclide identifier according to an embodiment of the present utility model, where the handheld nuclide identifier includes a housing 1, a detector module 2, and a circuit board 3, where:

the housing 1 includes an upper housing 11 and a lower housing 12, and the lower housing 12 is detachably combined with the upper housing 11 to form a cavity for accommodating the modules of the nuclide identifier.

The upper housing 11 and the lower housing 12 in this embodiment are made of aluminum materials, and can also pass electromagnetic compatibility experiments in order to reduce the weight as much as possible and meet the strength requirements of use. In order to improve the production efficiency and the product dimensional accuracy, the housing 1 is injection molded once.

Referring to fig. 1 and 2, the detector module 2 includes a lanthanum bromide crystal 21 and a SiPM plate 22, the lanthanum bromide crystal 21 is located at one side of the SiPM plate 22 and is located in the housing 1, and the SiPM plate 22 is coupled to the light emitting surface of the lanthanum bromide crystal 21 to convert the optical signal into an electrical signal.

It should be noted that, in this embodiment, lanthanum bromide crystal (LaBr 3) is a new generation of inorganic scintillation gamma ray detector, which has a higher resolution and a faster light decay time, and lanthanum bromide crystal 21 has a size of 1.5 inches, can be fixedly connected to housing 1, and is used for converting gamma rays into optical signals.

Preferably, lanthanum bromide crystal 21 (LaBr 3) is used as a radiation sensor in this embodiment, which can convert the detected gamma rays into optical signals, and use SiPM plates 22 to convert the optical signals into electrical signals, and the signals coming out of the SiPM plates 22 are further amplified and shaped by a preamplifier and enter digital multipass for energy spectrum acquisition, so as to perform nuclide identification.

In addition, the SiPM plates 22 are formed by splicing a plurality of SiPM plates of 6×6mm in this embodiment, and the type of the SiPM plates 22 is FJ60035, and the SiPM plates 22 are coupled with the light emitting surface of the lanthanum bromide crystal 21, so as to convert the optical signals into electrical signals.

It should be noted that, the current mainstream SiPM board is generally less than 1mm in thickness, the working voltage is about 30V, the edge dead zone is small, the stability is good, the consistency is high, the SiPM board has very strong external interference resistance, can work in a strong magnetic field, and cannot be damaged when exposed, and these characteristics make the SiPM board become the first choice of new detector design.

Referring to fig. 1 and 2, the circuit board 3 includes a main board 31, a core board 32 and a plurality of boards 33, wherein the main board 31 is accommodated in the cavity and positioned between the upper and lower cases 11 and 12, the core board 32 is disposed on one side of the main board 31 near the lower case 12, and the plurality of boards 33 are adapted to be vertically connected between the upper and lower cases 11 and 12.

The main board 31 is a middle board of other circuit boards, and is used for providing power for the SiPM board 22, the multi-channel board 33 and the core board 32, the main board 31 is fixedly connected with the shell 1, the multi-channel board 33 is electrically connected and fixed through two three-core pins and 90-degree pins, and the core board 32 is electrically connected and fixed with the main board 31 through a double row 0.8mm interval.

The multi-channel board 33 is configured to provide a bias voltage to the SiPM board 22, amplify a signal output by the SiPM board 22, and perform analog-to-digital conversion by using a 12-bit ADC, and enter an FPGA device (programmable logic device), where the FPGA model is 10cl016 e144 in this embodiment, so as to complete energy spectrum acquisition. Because the multipane 33 uses digitization instead of the conventional analog method, a shaping amplifying circuit and a peak-to-saturation circuit are not required, and the volume of the housing is reduced in comparison with the conventionally used housing.

The hand-held nuclide identifier adopts a compact design, the main board 31, the core board 32 and the multi-channel board 33 are fixedly connected in the shell 1 through reasonable layout, the detected gamma rays are converted into optical signals under the action of the lanthanum bromide crystal 21 and the SiPM board 22, the optical signals are converted into electric signals and amplified through the SiPM board 22, and then the multi-channel board 33 is used for energy spectrum acquisition, so that nuclide identification is completed.

Specifically, referring to fig. 8, in the present embodiment, the circuit board 3 is further integrated with a power module 34, wherein the power module 34 is electrically connected to the motherboard 31.

Specifically, in the present embodiment, the preamplifier, the FPGA device, the ARM device, and the ADC device are integrally provided on the multipass board 33;

the preamplifier is electrically connected with the SiPM plate 22, the FPGA device is connected with the ARM device, and the FPGA device is connected with the ADC device.

Specifically, in the present embodiment, the core board 32 is electrically connected to the FPGA device, and the model number of the core board 32 is OKMX6UL-C2.

The core board 32 in this embodiment is used for performing algorithm design on energy spectrum data of an FPGA device (programmable logic device), so as to realize nuclide identification, and control display of the liquid crystal panel 4 according to logic defined by keys.

Because the core board 32 integrates the general functions of the core, it has the versatility that one core board can customize various different base boards, which greatly improves the development efficiency of the single chip microcomputer. In addition, the core plate 32 is separated as a separate module, which also reduces development difficulty and increases system stability and maintainability.

Specifically, in the present embodiment, the handheld nuclide identifier further includes a key module (not shown) disposed on the upper housing 11, the key module is electrically connected to the main board 31 through an FPC line, and the key module is used for providing a control signal for the core board 32.

As a preferred mode of this embodiment, the key module adopts a film key, and the film key adopts a 6-key design and is connected with the main board 31 through an FPC line.

Specifically, in the present embodiment, the power module 34 includes a battery compartment provided on the housing 1, a detachable battery within the battery compartment, a wireless charging device, and a Type C interface device;

in addition, referring to fig. 8, in order to reasonably accommodate the layout, the power module 34 is disposed directly under the circuit board 3, and the power module 34 is electrically connected to the signal processing module.

Specifically, referring to fig. 1 and 2, in the present embodiment, the handheld nuclide identifier further includes a liquid crystal panel 4 disposed on the upper housing 1, and the liquid crystal panel 4 is electrically connected to the core board 32 and the main board 31. The liquid crystal panel 4 is controlled by the core board 32 and is connected to the main board 31 through FPC lines.

Specifically, referring to fig. 1 and 2, in the present embodiment, the power module 34 includes a battery compartment provided on the housing 1, a detachable battery in the battery compartment, a wireless charging device, and a Type C interface device; the power module 34 is disposed on the right lower side of the circuit board 3, so as to realize a strong-weak current separation layout, and the power module 34 is electrically connected with the signal processing module.

Specifically, referring to fig. 1 and 2, in the present embodiment, the upper housing 11 and the lower housing 12 are connected by a bolt, the lower housing 12 is provided with a first connecting hole 121, the position of the upper housing 11 opposite to the lower housing 12 is provided with a corresponding second connecting hole 111, and the upper housing 11 and the lower housing 12 are connected in a sealing contact manner by the bolt through the first connecting hole 121 and the second connecting hole 111.

Specifically, in the present embodiment, the core board 32 is of the type OKMX6UL-C2.

The core board 32 is an electronic motherboard for packaging the core functions of a small PC, and the core board 32 integrates a CPU, a memory device and pins, and is connected with a supporting base board through the pins, so as to implement a system chip in a certain field, and such a system is often referred to as a single-chip microcomputer or an embedded development platform.

The utility model also provides equipment comprising the handheld nuclide identifier.

The device has the same beneficial effects as a handheld nuclide identifier and is not described in detail herein.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the utility model.

Claims (9)

1. A hand-held nuclear species identifier, characterized by comprising a housing (1), a detector module (2) for converting detected gamma rays into optical signals, and a circuit board (3) for performing nuclear species identification;

the shell (1) comprises an upper shell (11) and a lower shell (12), and the lower shell (12) is detachably combined with the upper shell (11) to form a cavity;

the detector module (2) comprises a lanthanum bromide crystal (21) and a SiPM plate (22) housed in the cavity, the lanthanum bromide crystal (21) being located on one side of the SiPM plate (22);

the SiPM plate (22) is coupled with the light-emitting surface of the lanthanum bromide crystal (21) so as to convert optical signals into electric signals;

the circuit board (3) comprises a main board (31), a core board (32) and a multi-channel board (33), wherein:

the main board (31) is accommodated in the cavity and positioned between the upper shell (11) and the lower shell (12), the core board (32) is arranged on one side of the main board (31) close to the lower shell (12), and the multi-channel board (33) is suitable for being vertically connected between the upper shell (11) and the lower shell (12).

2. The hand-held nuclear species identifier according to claim 1, wherein the circuit board (3) is further provided with a power module (34) in an integrated manner, and the power module (34) is electrically connected to the main board (31).

3. The hand-held nuclear species identifier according to claim 1, wherein the multi-track board (33) is integrally provided with a preamplifier, an FPGA device, an ARM device and an ADC device;

the preamplifier is electrically connected with the SiPM plate (22), the FPGA device is electrically connected with the ARM device, and the FPGA device is electrically connected with the ADC device.

4. The hand-held nuclear species identifier of claim 3 wherein the core plate (32) is electrically connected to the FPGA device and the core plate (32) is of the type kmx6UL-C2.

5. The hand-held nuclear species identifier of claim 2, further comprising a key module disposed on the upper housing (11), the key module being electrically connected to the main board (31) through an FPC line, and the key module being configured to provide a control signal to the core board (32).

6. The hand-held nuclear species identification instrument of claim 3 wherein: the liquid crystal display device further comprises a liquid crystal panel (4) arranged on the upper shell (11), and the liquid crystal panel (4) is electrically connected with the core board (32) and the main board (31).

7. The handheld nuclear species identifier of claim 2 wherein the power module (34) includes a battery compartment disposed on the housing (1), a removable battery within the battery compartment, a wireless charging device, and a Type C interface device;

the power module (34) is arranged on the right lower side of the circuit board (3), and the power module (34) is connected with the signal processing module.

8. The hand-held nuclide identifier of claim 1, wherein the upper housing (11) and the lower housing (12) are connected by a bolt, a first connecting hole (121) is formed in the lower housing (12), a corresponding second connecting hole (111) is formed in a position, opposite to the lower housing (12), of the upper housing (11), and the bolt is suitable for connecting the upper housing (11) and the lower housing (12) in a sealing contact manner through the first connecting hole (121) and the second connecting hole (111).

9. The hand-held nuclear species identifier of any one of claims 1 to 8 wherein the core plate (32) is of the type kmx6UL-C2.