Collimation array detection system for measuring radioactive source distribution in complex radiation field

Abstract

The invention discloses a collimation array detection system for measuring radioactive source distribution in a complex radiation field, and solves the problems that a traditional complex radiation field construction method is long in time consumption and low in efficiency, the resolution ratio of obtained radioactive source distribution information is low, and life health and safety of workers are difficult to guarantee. The device specifically comprises a detection unit, a collimation shielding unit and a data processing unit. The detection unit comprises a PCB (Printed Circuit Board) assembly, an N * N detector array and a buffer gasket, wherein N is greater than or equal to 2; the N * N detector array is installed on the PCB assembly. The buffer gasket is arranged on the detection end face of the N * N detector array; the collimation shielding unit comprises a detection shell and a collimation assembly which are connected with each other; the PCB assembly, the N * N detector array and the buffer gasket are all mounted in the detection shell; n * N collimation channels penetrating through the two ends of the collimation assembly are arranged in the collimation assembly; the data processing unit is connected with the N * N detector array through the PCB assembly.

Description

Technical Field

[0001] The invention relates to a radiation source distribution measurement system, in particular to a collimated array detection system used for measuring radiation source distribution in a complex radiation field. Background Art

[0002] In the field of pulsed gamma radiation detection, the widespread application of radioactive sources in various fields has brought huge economic value while also bringing certain safety hazards. After the decommissioning of some large radioactive facilities, it is necessary to conduct a detailed investigation of the location distribution of their radioactive sources and then reconstruct the radiation field. In addition, some radioactive accident contaminated areas also need to be monitored to reduce their harm to personnel and the environment. The traditional method of constructing a complex radiation field is to traverse the area to be tested through fixed monitoring nodes or portable radiation measuring instruments, and obtain the distribution information of radioactive sources through data inversion. This method is time-consuming and inefficient, and the resolution of the obtained radioactive source distribution information is low. It also requires professionals to enter the unknown radiation level area to operate, which makes it difficult to ensure the life, health and safety of the staff; for some unknown surface morphology or closed radioactive spaces that are difficult for personnel to enter, traditional methods are even more difficult to measure. Summary of the invention

[0003] In order to solve the technical problems that the traditional complex radiation field construction method is time-consuming, inefficient, the obtained radiation source distribution information has low resolution and is difficult to ensure the life, health and safety of workers, the present invention provides a collimated array detection system for measuring the radiation source distribution of complex radiation fields.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A collimated array detection system for measuring the distribution of radioactive sources in a complex radiation field, which is special in that it includes a detection unit, a collimated shielding unit and a data processing unit;

[0006] The detection unit includes a PCB board assembly, an N×N detector array and a buffer gasket, N≥2; the N×N detector array is mounted on the PCB board assembly; the buffer gasket is arranged on the detection end surface of the N×N detector array;

[0007] The collimation shielding unit comprises a detection housing and a collimation assembly connected to each other; the PCB board assembly, the N×N detector array and the buffer gasket are all installed in the detection housing; the collimation assembly is provided with N×N collimation channels running through both ends thereof; one end of the N×N collimation channels respectively corresponds to the detection end face of the N×N detector array, and the other end thereof faces the radiation source to be detected;

[0008] The data processing unit is located outside the detection housing and the collimation assembly, and is connected to the N×N detector array via a PCB board assembly.

[0009] Further, the collimation assembly comprises a collimator, an incident window plate and a side window plate;

[0010] One end of the collimator is connected to the detection shell, a weight-reducing cavity is provided in the middle, and a side window is provided on the side wall corresponding to the weight-reducing cavity; the collimator channel is arranged in the collimator and is divided into two sections by the weight-reducing cavity;

[0011] The incident window plate is packaged outside the other end of the collimator;

[0012] The side window plate is encapsulated outside the side window.

[0013] Further, the detection housing includes a front housing, a rear housing and a threading assembly;

[0014] The outer wall of the front shell is in the shape of a cone, and a mounting channel for the collimator is provided inside the outer wall of the front shell for the collimator to pass through, and the inner wall of the mounting channel matches the outer wall of the collimator;

[0015] The rear housing is detachably connected to the large end of the cone of the front housing, and a mounting notch is provided on the side wall close to the front housing; the PCB board assembly, the N×N detector array and the buffer gasket are all arranged between the front housing and the rear housing;

[0016] The threading assembly is embedded in the installation notch and is used for allowing the connection cable between the PCB board assembly and the data processing unit to pass through.

[0017] Further, the threading assembly comprises a left threading block and a right threading block which are symmetrically embedded in the installation notch side by side;

[0018] The left threading block is provided with a left protrusion at one end away from the front shell; a long strip-shaped left threading notch is provided on the side of the left protrusion close to the right threading block; both ends of the left threading notch pass through the inside and outside of the rear shell;

[0019] The right threading block is provided with a right protrusion at one end away from the front shell; a long strip right threading notch is provided on the side of the right protrusion close to the left threading block; both ends of the right threading notch pass through the inside and outside of the rear shell;

[0020] The open ends of the left threading notch and the right threading notch are relatively buckled and can be spliced ​​into a threading hole that passes through the inside and outside of the rear shell body. The part of the threading hole close to the outside of the rear shell body is arc-shaped.

[0021] Furthermore, a left limiting protrusion is provided on the side wall of the left threading block away from the right threading block;

[0022] A right limiting protrusion is provided on the side wall of the right threading block away from the left threading block;

[0023] A left limiting notch and a right limiting notch which match the left limiting protrusion and the right limiting protrusion respectively are arranged on the side wall of the installation notch of the rear shell.

[0024] Furthermore, a long strip-shaped slider is provided on the large end surface of the frustum of the front housing;

[0025] A long strip slide groove is provided on one end surface of the rear housing close to the front housing;

[0026] The long strip sliding block cooperates with the long strip sliding groove to realize the detachable connection between the rear shell and the front shell;

[0027] The outer wall of the rear shell body away from the front shell body is provided with arc chamfers all around.

[0028] Furthermore, an annular limiting notch is provided on the side wall of the installation channel; the annular limiting notch is located at one end of the installation channel close to the rear shell;

[0029] An annular limiting protrusion is provided on the outer wall of the collimator close to one end of the rear shell;

[0030] The annular limiting notch and the annular limiting protrusion cooperate with each other to limit the installation position of the alignment body.

[0031] Furthermore, the PCB board assembly includes a first PCB board and a second PCB board connected in parallel to each other; the N×N detector array is arranged on the first PCB board; a cable plug interface is arranged on the second PCB board, and the cable plug interface corresponds to the threading hole and is used for leading the cable out of the threading hole;

[0032] The detection unit also includes a gyro attitude sensor and a temperature and humidity sensor; the gyro attitude sensor and the temperature and humidity sensor are both installed on the second PCB board and are respectively connected to the data processing unit;

[0033] An optical camera and a laser rangefinder which are respectively connected to an external host computer are also arranged on the outer wall of the collimator.

[0034] Furthermore, the detection housing and the collimation assembly are both made of tungsten;

[0035] The incident window plate is a Be thin plate with a thickness of 1 mm;

[0036] The side window plate is an Al thin plate with a thickness of 1 mm;

[0037] The N×N detector arrays all use hemispherical CZT detectors, N=3;

[0038] The buffer gasket is a polyethylene gasket with a thickness of 1 mm.

[0039] Furthermore, it also includes a two-axis rotating platform or a robotic arm;

[0040] The two-axis rotating platform or the action end of the mechanical arm is connected to the detection housing and is used to drive the detection unit and the alignment and shielding unit to perform two-dimensional rotation.

[0041] Beneficial effects of the present invention:

[0042] 1. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields provided by the present invention has a simple and effective structure. It only needs to scan the space to be measured at a specific point and does not need to patrol and move in the area to be measured. It is more suitable for measuring environments with complex morphology.

[0043] 2. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields provided by the present invention can be applied to the measurement of the distribution of radiation sources in high-intensity complex radiation fields through the coordinated use of a collimated shielding unit and a detection unit. It has a high angular resolution and can more accurately obtain the radiation source energy spectrum and intensity information of the area to be measured.

[0044] 3. The collimated array detection system provided by the present invention for measuring the distribution of radiation sources in complex radiation fields has N×N collimated channels arranged inside the collimator, and each channel corresponds to a detector one by one. It can detect individually or multiple detectors can be detected together, which can effectively expand the scope of application of the detection system.

[0045] 4. The collimation array detection system provided by the present invention for measuring the distribution of radiation sources in complex radiation fields has a weight-reducing cavity arranged in the middle of the collimation body, so that the collimation channel is divided into two sections, front and rear. In this way, it can not only limit the radiation beam, but also reduce the weight of the entire system, making the system lighter.

[0046] 5. The collimated array detection system provided by the present invention for measuring the distribution of radiation sources in complex radiation fields has arc chamfers on all sides of the outer wall of the rear shell away from the side of the front shell, so that the thickness of the rear shell at various locations can be more uniform, and its attenuation performance is more uniform, which is beneficial to improving the accuracy of the detection information.

[0047] 6. The collimated array detection system provided by the present invention for measuring the distribution of radioactive sources in complex radiation fields is provided with a threading assembly consisting of a left threading block and a right threading block. The left threading notch on the left threading block and the right threading notch on the right threading notch can be spliced ​​into a threading hole that passes through the inside and outside of the rear shell body, so that when the wiring plug is built into the detection shell body, the wiring can be passed through the threading hole. The threading hole occupies a small space and can reduce radiation interference.

[0048] 7. The collimated array detection system provided by the present invention for measuring the distribution of radiation sources in complex radiation fields has an optical camera and a laser rangefinder arranged on the outer wall of the collimator, which can simultaneously measure the real-life image of the space and the distance information of the measuring points, and directly provide the spatial distribution information of the radiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of a collimated array detection system for measuring the distribution of radiation sources in a complex radiation field according to a first embodiment of the present invention;

[0050] Figure 2 yes Figure 1 Longitudinal section of

[0051] Figure 3 yes Figure 1 Exploded diagram of

[0052] Figure 4 It is a schematic diagram of the assembly of the threading assembly and the rear housing in the first embodiment of the present invention;

[0053] Figure 5 is a schematic structural diagram of a threading assembly in Embodiment 1 of the present invention;

[0054] Figure 6 It is a structural schematic diagram of the left threading block in the first embodiment of the present invention;

[0055] Figure 7 It is a structural schematic diagram of the right threading block in the first embodiment of the present invention;

[0056] Figure 8 is a schematic diagram of the assembly of the front housing and the collimator in the first embodiment of the present invention;

[0057] Fig. 9 is a schematic diagram of the assembly of the front housing and the rear housing in the first embodiment of the present invention;

[0058] Fig.10 It is a structural schematic diagram of a second embodiment of a collimated array detection system for measuring the distribution of radiation sources in a complex radiation field according to the present invention.

[0059] Figure Number:

[0060] 1-detection unit, 11-PCB board assembly, 111-first PCB board, 112-second PCB board, 113-cable plug interface, 12-N×N detector array, 13-buffer gasket, 2-collimation shielding unit, 21-detection housing, 211-front housing, 212-rear housing, 213-threading assembly, 214-installation channel, 215-installation notch, 216-left limit notch, 217-right limit notch, 218-arc chamfer, 22-collimation assembly, 221- Collimator, 222-incident window plate, 223-side window plate, 224-weight reduction cavity, 23-collimation channel, 24-left threading block, 241-left protrusion, 242-left threading notch, 243-left limiting protrusion, 25-right threading block, 251-right protrusion, 252-right threading notch, 253-right limiting protrusion, 26-long strip slider, 27-long strip slide, 28-annular limiting notch, 29-annular limiting protrusion, 3-support plate, 4-support ring, 5-connecting plate, 6-support column. DETAILED DESCRIPTION

[0061] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0062] Embodiment 1:

[0063] This embodiment provides a collimated array detection system for measuring the distribution of radiation sources in a complex radiation field, combining Figure 1 , Figure 2 and Figure 3 As shown, it includes a detection unit 1, a collimation and shielding unit 2, a data processing unit and a two-axis rotating platform or a mechanical arm.

[0064] The detection unit 1 includes a PCB board assembly 11, an N×N detector array 12, a buffer gasket 13, a gyroscope posture sensor and a temperature and humidity sensor; the N×N detector array 12 is welded on the PCB board assembly 11, and the distance between adjacent detectors is 15mm; the buffer gasket 13 is arranged on the detection end surface of the N×N detector array 12; the PCB board assembly 11 includes a first PCB board 111 and a second PCB board 112 connected in parallel with each other; the first PCB board 111 is a 9-way independent charge sensitive preamplifier, which provides amplification for 9 CZT detector signals respectively; the second PCB board 112 is an auxiliary peripheral circuit, mainly including a power supply circuit for the charge sensitive preamplifier, a high-voltage bias circuit for providing high voltage for the CZT detector, etc.; the size of the first PCB board 111 and the second PCB board 112 is not greater than 5.5mm*5.5mm, and the thickness of the double-layer PCB is not greater than 2.5mm; the N×N detector array 12 is arranged on the first PCB board 111 and the second PCB board 112 is provided with a cable plug interface 113, and the cable plug interface 113 corresponds to the threading hole. The gyro position sensor and the temperature and humidity sensor are both soldered on the second PCB board 112. The gyro position sensor is used to obtain the real-time position information of the detector array and the collimation shielding unit, and obtain the radiation space distribution information by fitting with the radiation measurement data; the temperature and humidity sensor can obtain the real-time temperature of the environment and perform temperature drift correction on the data collected by the detector; this embodiment preferably uses 3×3, that is, 9 hemispherical CZT detectors to form a detector array; the CZT crystal size is 5×5×2.5mm 3 , 10×10×5mm 3 Two sizes; the CZT crystal uses a pin-type pin to lead out the two electrodes, which is convenient for direct welding on the first PCB board 111, reducing the distance between the charge sensitive preamplifier and reducing noise. The detector can also be composed of a common scintillator detector (such as GAGG) that is not easy to deliquesce and coupled with SiPM, and its size can be flexibly adjusted according to the structure of the collimation channel 23.

[0065] The collimation shielding unit 2 includes a detection shell 21 and a collimation assembly 22 that are interconnected; the PCB board assembly 11, the N×N detector array 12 and the buffer gasket 13 are all installed in the detection shell 21; the detection shell 21 and the collimation assembly 22 are both made of tungsten material with a high radiation attenuation coefficient; the N×N detector array 12 adopts N=3; the buffer gasket 13 is a polyethylene gasket with a thickness of 1 mm.

[0066] The detection housing 21 includes a front housing 211 , a rear housing 212 and a threading assembly 213 .

[0067] The outer wall of the front housing 211 is in the shape of a cone, and its radial length (i.e., the height of the cone) is 20 mm, which can ensure that when incident rays from any direction pass through the collimating shielding unit 2 and reach the detector, the thickness of the attenuation material they pass through is greater than 20 mm. Figure 3 and Figure 8 As shown, the interior of the front housing 211 is provided with a mounting channel 214 for penetrating the collimator 221, and the inner wall of the mounting channel 214 matches the outer wall of the collimator 221; a long strip slider 26 is provided on the large end surface of the cone of the front housing 211; Fig. 9 As shown, a long strip slide groove 27 is provided on the end surface of the rear shell 212 close to the front shell 211; the long strip slider 26 cooperates with the long strip slide groove 27 to realize the detachable connection between the rear shell 212 and the front shell 211, and is fixed with bolts; in addition, an annular limiting notch 28 is provided on the side wall of the installation channel 214; the annular limiting notch 28 is located at one end of the installation channel 214 close to the rear shell 212.

[0068] like Figure 4 As shown, the rear shell 212 is a rectangular parallelepiped structure with an outer diameter of 100mm×100mm×50mm and an internal space of 55mm×55mm×25mm. A mounting notch 215 is provided on the side wall of the rear shell 212 close to the front shell 211. The PCB board assembly 11, the N×N detector array 12 and the buffer gasket 13 are all arranged between the front shell 211 and the rear shell 212. The threading assembly 213 is embedded in the mounting notch 215 for passing the connection cable between the PCB board assembly 11 and the data processing unit. The outer wall of the rear shell 212 away from the front shell 211 is provided with arc chamfers 218 on all sides, and the radius of the fillet is 20mm. While ensuring that the thickness in all directions is greater than 2mm, the weight of the rear shielding shell is reduced and the thickness uniformity is guaranteed to the greatest extent.

[0069] Combination Figure 5 , Figure 6 and Figure 7As shown, the threading assembly 213 includes a left threading block 24 and a right threading block 25 which are symmetrically embedded in the installation notch 215 side by side; a left protrusion 241 is provided at one end of the left threading block 24 away from the front shell 211; a long strip-shaped left threading notch 242 is provided on the side of the left protrusion 241 close to the right threading block 25; both ends of the left threading notch 242 pass through the inside and outside of the rear shell 212; a right protrusion 251 is provided at one end of the right threading block 25 away from the front shell 211; a long strip-shaped right threading notch 252 is provided on the side of the right protrusion 251 close to the left threading block 24; both ends of the right threading notch 252 pass through the inside and outside of the rear shell 212; the opening ends of the left threading notch 242 and the right threading notch 252 are opposite to each other and can be spliced ​​into a threading hole that passes through the inside and outside of the rear shell 212, and the part of the threading hole close to the outer side of the rear shell 212 is arc-shaped. A left limiting protrusion 243 is provided on the side wall of the left threading block 24 away from the right threading block 25; a right limiting protrusion 253 is provided on the side wall of the right threading block 25 away from the left threading block 24; a left limiting notch 216 and a right limiting notch 217 which match the left limiting protrusion 243 and the right limiting protrusion 253 respectively are provided on the side wall of the installation notch 215 of the rear shell body 212.

[0070] The collimating assembly 22 includes a collimating body 221 , an incident window plate 222 and a side window plate 223 .

[0071] The collimator 221 is a rectangular parallelepiped structure, and 3×3 collimator channels 23 are provided inside the collimator 221 and pass through its two ends; one end of the 3×3 collimator channels 23 corresponds to the detection end surface of the 3×3 detector array 11 respectively, and the other end faces the radiation source to be measured; the size of the collimator channel 23 is adapted to the size of the detector, and its length can be set to 25mm-150mm according to the angular resolution requirement; in this embodiment, the size of the collimator channel 23 is 5mm×5mm, and the length is 100mm.

[0072] One end of the collimator 221 is connected to the detection housing 21, and a weight-reducing cavity 224 is provided in the middle thereof, and a side window is provided on the side wall corresponding to the weight-reducing cavity 224; the weight-reducing cavity 224 can reduce the weight of the system without affecting the measurement effect; the collimator channel 23 is arranged in the collimator 221, and is divided into two sections by the weight-reducing cavity 224, the length of the section away from the rear housing is 20mm, and the length of the section close to the rear housing is 50mm, and the length of the weight-reducing cavity 224 is 30mm; the incident window plate 222 is packaged outside the other end of the collimator 221, and the incident window plate 222 is a Be thin plate with a thickness of 1mm; the side window plate 223 is packaged outside the side window, and the side window plate 223 is an Al thin plate with a thickness of 1mm. An annular limiting protrusion 29 is provided on the outer wall of the collimator 221 near the rear housing 212; the annular limiting notch 28 and the annular limiting protrusion 29 cooperate in a concave-convex manner to limit the installation position of the collimator 221. An optical camera and a laser rangefinder which are respectively connected to an external host computer are also provided on the outer wall of the collimator 221; the optical camera is used to obtain the front-end image for radiation data fitting to obtain fitting data of the radiation distribution and the actual scene; the laser rangefinder obtains the distance from the detector to the detected radiation source, and obtains the activity information of the radiation source by fitting with the detection result.

[0073] The data processing unit is arranged outside the collimation shielding unit 2, and includes a data processing module, a power supply module and a communication module respectively connected to the data processing module. The data processing module is respectively connected to the N×N detector array 12, the gyroscope posture sensor and the temperature and humidity sensor; the data processing module is a 9-channel digital energy spectrometer, which can independently collect the energy spectrum data obtained by the 9-channel detector array; the power supply module provides the working voltage for the data processing module and the bias voltage for the detector array; the communication module is a wired or wireless network module, which realizes the communication function with the external host computer.

[0074] The working end of the two-axis rotating platform or the robotic arm is connected to the detection shell 21, and is used to drive the detection unit 1 and the collimation shielding unit 2 to rotate in two dimensions, so as to scan and detect the radiation space to be measured, and process it through the data processing unit to obtain the distribution information of the radiation space to be measured; the rotation angle range of the B-axis direction is -90° to 90°, and the rotation range of the A-axis direction is 0 to 360°, and the scanning space is a hemispherical space.

[0075] The detection system provided in this embodiment can be applied to the measurement of the distribution of radiation sources in high-intensity complex radiation fields, has a high angular resolution, and can obtain the radiation source energy spectrum and intensity information of the area to be measured; it can enter the area to be measured for detection by carrying an unmanned carrier platform, and no close-range operation is required; it has a simple structure, and only needs to scan the radiation space to be measured at a specific point, and does not need to patrol and move in the area to be measured, which is more suitable for measuring complex morphology environments to be measured; it is equipped with an optical camera and a rangefinder, and can simultaneously measure the real-life image of the radiation space to be measured and the distance information of the measuring points, and directly provide the spatial distribution information of the radiation.

[0076] Embodiment 2:

[0077] like Fig.10 As shown, this embodiment is basically the same as the first embodiment, except that a support plate 3 is provided outside the rear shell 212, and two support rings 4 and a connecting plate 5 are provided on the support plate 3. A support column 6 is installed inside the two support rings 4 and the connecting plate 5, and the two-axis rotating platform or the robotic arm is connected to the rear shell 212 through the support column 6, the connecting plate 5 and the support ring 4.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A collimated array detection system for measuring the distribution of radiation sources in complex radiation fields, characterized by: It comprises a detection unit (1), a collimation and shielding unit (2) and a data processing unit; The detection unit (1) comprises a PCB board assembly (11), an N×N detector array (12) and a buffer gasket (13), N≥2; the N×N detector array (12) is mounted on the PCB board assembly (11); and the buffer gasket (13) is arranged on the detection end surface of the N×N detector array (12); The collimation shielding unit (2) comprises a detection housing (21) and a collimation assembly (22) which are connected to each other; the PCB board assembly (11), the N×N detector array (12) and the buffer gasket (13) are all installed in the detection housing (21); the collimation assembly (22) is provided with N×N collimation channels (23) running through both ends thereof; one end of the N×N collimation channels (23) respectively corresponds to the detection end face of the N×N detector array (12) one by one, and the other end thereof faces the radiation source to be detected; The data processing unit is located outside the detection housing (21) and the collimation assembly (22), and is connected to the N×N detector array (12) via a PCB board assembly (11).

2. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 1, characterized in that: The collimating assembly (22) comprises a collimating body (221), an incident window plate (222) and a side window plate (223); One end of the collimator (221) is connected to the detection housing (21), a weight-reducing cavity (224) is provided in the middle thereof, and a side window is provided on the side wall corresponding to the weight-reducing cavity (224); the collimator channel (23) is arranged in the collimator (221) and is divided into two sections by the weight-reducing cavity (224); The incident window plate (222) is packaged outside the other end of the collimator (221); The side window plate (223) is sealed outside the side window.

3. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 2, characterized in that: The detection housing (21) comprises a front housing (211), a rear housing (212) and a threading assembly (213); The outer wall of the front shell (211) is in the shape of a cone, and a mounting channel (214) for passing the collimator (221) is provided inside the front shell, and the inner wall of the mounting channel (214) matches the outer wall of the collimator (221); The rear housing (212) is detachably connected to the large end of the cone of the front housing (211), and a mounting notch (215) is provided on the side wall close to the front housing (211); the PCB board assembly (11), the N×N detector array (12) and the buffer gasket (13) are all arranged between the front housing (211) and the rear housing (212); The threading assembly (213) is embedded in the installation notch (215) and is used for allowing the connection cable between the PCB board assembly (11) and the data processing unit to pass through.

4. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 3, characterized in that: The threading assembly (213) comprises a left threading block (24) and a right threading block (25) which are symmetrically embedded side by side in the installation notch (215); The left threading block (24) is provided with a left protrusion (241) at one end away from the front shell (211); a long strip-shaped left threading notch (242) is provided on the side of the left protrusion (241) close to the right threading block (25); both ends of the left threading notch (242) penetrate inside and outside the rear shell (212); The right threading block (25) is provided with a right protrusion (251) at one end away from the front shell (211); a long strip-shaped right threading notch (252) is provided on the side of the right protrusion (251) close to the left threading block (24); both ends of the right threading notch (252) penetrate inside and outside the rear shell (212); The open ends of the left threading notch (242) and the right threading notch (252) are relatively buckled and can be spliced ​​into a threading hole that passes through the inside and outside of the rear shell (212), and the part of the threading hole close to the outside of the rear shell (212) is arc-shaped.

5. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 4, characterized in that: A left limiting protrusion (243) is provided on the side wall of the left threading block (24) away from the right threading block (25); A right limiting protrusion (253) is provided on the side wall of the right threading block (25) away from the left threading block (24); A left limiting notch (216) and a right limiting notch (217) are provided on the side wall of the installation notch (215) of the rear housing (212), respectively matching the left limiting protrusion (243) and the right limiting protrusion (253).

6. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 5, characterized in that: A long strip-shaped sliding block (26) is provided on the large end surface of the frustum of the front housing (211); A long strip-shaped slide groove (27) is provided on an end surface of the rear housing (212) close to the front housing (211); The elongated sliding block (26) cooperates with the elongated sliding groove (27) to realize a detachable connection between the rear housing (212) and the front housing (211); The outer wall of the rear shell (212) on the side away from the front shell (211) is provided with arc chamfers (218) all around.

7. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 6, characterized in that: An annular limiting notch (28) is provided on the side wall of the installation channel (214); the annular limiting notch (28) is located at one end of the installation channel (214) close to the rear shell (212); An annular limiting protrusion (29) is provided on the outer wall of the collimating body (221) at one end close to the rear shell (212); The annular limiting notch (28) and the annular limiting protrusion (29) cooperate in a concave-convex manner to limit the installation position of the alignment body (221).

8. The collimated array detection system for measuring the distribution of radiation sources in complex radiation fields according to claim 7, characterized in that: The PCB board assembly (11) comprises a first PCB board (111) and a second PCB board (112) which are connected in parallel to each other; the N×N detector array (12) is arranged on the first PCB board (111); the second PCB board (112) is provided with a cable insertion interface (113), the cable insertion interface (113) corresponds to the threading hole and is used for leading the cable out of the threading hole; The detection unit (1) further comprises a gyroscopic posture sensor and a temperature and humidity sensor; the gyroscopic posture sensor and the temperature and humidity sensor are both mounted on a second PCB board (112) and are respectively connected to the data processing unit; An optical camera and a laser rangefinder which are respectively connected to an external host computer are also provided on the outer wall of the collimator (221).

9. The collimated array detection system for measuring the distribution of radiation sources in a complex radiation field according to any one of claims 2 to 8, characterized in that: The detection housing (21) and the collimation assembly (22) are both made of tungsten; The incident window plate (222) is a Be thin plate with a thickness of 1 mm; The side window plate (223) is an Al thin plate with a thickness of 1 mm; The N×N detector array (12) all uses hemispherical CZT detectors, N=3; The buffer gasket (13) is a polyethylene gasket with a thickness of 1 mm.

10. The collimated array detection system for measuring the distribution of radiation sources in a complex radiation field according to claim 9, characterized in that: It also includes a two-axis rotation platform or robotic arm; The active end of the two-axis rotating platform or the mechanical arm is connected to the detection housing (21) and is used to drive the detection unit (1) and the alignment shielding unit (2) to perform two-dimensional rotation.

Images