Nuclear decommissioning space radiation field modeling device

Abstract

The invention discloses a nuclear decommissioning space radiation field modeling device, and relates to the technical field of nuclear radiation detection. Comprising a radiation data acquisition module and a scene fusion module. The radiation data acquisition module is connected with the input end of the scene fusion module and is used for performing three-dimensional scanning and radiation information acquisition on the nuclear radiation environment to obtain radiation data; and the scene fusion module is connected with the output end of the radiation data acquisition module and is used for generating a radiation dose three-dimensional distribution model according to fusion of the radiation data and the three-dimensional point cloud model. According to the invention, the dose field distribution condition of the nuclear radiation area is intuitively known, and data support is provided for work formulation and radiation protection of operators.

Description

Technical Field

[0001] The present invention relates to the field of nuclear radiation detection technology, and more particularly to a nuclear decommissioning space radiation field modeling device. Background Art

[0002] During the decommissioning of nuclear facilities, workers are required to carry out on-site construction, and there may be various radioactive objects on site. Therefore, in the decommissioning of nuclear facilities, equipment maintenance, and nuclear emergency response, the decommissioned nuclear facility construction site is scanned in three dimensions and the radiation dose spatial distribution imaging is performed to determine the radiation spatial dose distribution of the nuclear radiation operation environment. This can help construction workers intuitively determine the location of the radiation source, evaluate the construction operation process, and help improve the efficiency of equipment and facility maintenance, nuclear emergency response, and nuclear facility decommissioning operations, as well as provide reliable data support for personal protection of operators.

[0003] Existing technologies have problems in detecting and modeling radiation fields in nuclear decommissioning spaces, such as low efficiency, non-intuitive data, and inability to update in real time. Manual detection methods are time-consuming and difficult to fully cover the entire radiation field, resulting in incomplete collection of radiation information, which affects the safety and efficiency of subsequent operations.

[0004] Therefore, it is an urgent problem for those skilled in the art to propose a nuclear decommissioning space radiation field modeling device to solve the difficulties existing in the prior art. Summary of the invention

[0005] In view of this, the present invention provides a nuclear decommissioning space radiation field modeling device for solving the technical problems existing in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A nuclear decommissioning space radiation field modeling device, comprising: a radiation data acquisition module and a scene fusion module; The radiation data acquisition module is connected to the input end of the scene fusion module and is used to perform three-dimensional scanning and radiation information acquisition on the nuclear radiation environment to obtain radiation data; The scene fusion module is connected to the output end of the radiation data acquisition module and is used to generate a three-dimensional distribution model of radiation dose based on the fusion of radiation data and the three-dimensional point cloud model.

[0007] The above-mentioned device, optionally, the radiation data acquisition module includes: a dose rate probe, an energy spectrometer probe, and a visual SLAM camera.

[0008] In the above device, optionally, the spectrometer probe adopts a CZT or LaBr3 detector.

[0009] In the above device, optionally, the dose rate probe adopts a Geiger Mueller detector.

[0010] In the above device, optionally, the visual SLAM camera adopts a 3D camera.

[0011] In the above device, optionally, the scene fusion module includes: a three-dimensional reconstruction module, a radiation data space interpolation module and a data fusion module; wherein, 3D reconstruction module, used to perform real-time 3D scanning and map construction of the radiation area based on the 3D camera and visual SLAM camera; The radiation data space interpolation module is used to select a linear three-dimensional interpolation algorithm to perform three-dimensional space interpolation according to the collected radiation data; The data fusion module is used to fuse the interpolated radiation data with the three-dimensional point cloud model to generate a three-dimensional distribution model of radiation dose.

[0012] The above-mentioned device may optionally further include a main control panel, which serves as a control center and is responsible for coordinating the work of each module, processing data, and displaying the final three-dimensional radiation dose distribution model.

[0013] In the above device, optionally, the main control tablet adopts a triple-proof reinforced tablet. It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a nuclear decommissioning space radiation field modeling device, which has the following beneficial effects: 1) Based on the visual SLAM camera, the 3D camera is used to perform 3D scanning of the radiation area and provide accurate spatial coordinate positioning for the radiation measurement data; 2) The radiation data after interpolation is obtained by three-dimensional space interpolation through the three-dimensional space interpolation algorithm. The nuclear decommissioning space scene data fusion fuses the radiation data with the three-dimensional point cloud model to obtain a three-dimensional distribution model of radiation dose, so as to intuitively understand the distribution of dose field in the nuclear radiation area and provide data support for the work planning and radiation protection of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 A structural diagram of a nuclear decommissioning space radiation field modeling device provided by the present invention; Figure 2 A block diagram of a CZT or LaBr3 (Ce) + SiPM digital spectrometer provided by the present invention; Figure 3This is the appearance diagram of the three-proof reinforced flat plate provided by the present invention. DETAILED DESCRIPTION

[0016] 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.

[0017] See also Figure 1 As shown, the present invention discloses a nuclear decommissioning space radiation field modeling device, including: a radiation data acquisition module and a scene fusion module; The radiation data acquisition module is connected to the input end of the scene fusion module and is used to perform three-dimensional scanning and radiation information acquisition on the nuclear radiation environment to obtain radiation data; The scene fusion module is connected to the output end of the radiation data acquisition module and is used to generate a three-dimensional distribution model of radiation dose based on the fusion of radiation data and the three-dimensional point cloud model.

[0018] Furthermore, the radiation data acquisition module includes: a dose rate probe, an energy spectrometer probe, and a visual SLAM camera.

[0019] Furthermore, the spectrometer probe adopts a CZT or LaBr3 (Ce) detector.

[0020] Specifically, energy spectrum measurement is mainly used to identify and analyze radioactive nuclides in the radiation environment. The energy spectrometer measurement probe of the nuclear decommissioning space radiation field modeling device adopts a miniature low-power detection CZT or LaBr3 (Ce) + SIPM solution, matched with front-end electronics and digital multi-channel to realize gamma energy spectrum measurement.

[0021] CZT or LaBr3 (Ce) detectors use SiPM to realize optical signal readout, and a multi-channel front-end readout circuit needs to be designed. The output signal of the front-end readout circuit is synthesized and output to the digital multi-channel pulse amplitude analyzer. The front-end output signal is pre-amplified and discretized into a digital quantity by a high-speed analog-to-digital converter. The dual-channel digital trapezoidal shaping filter is used inside the FPGA chip to perform shaping filtering. The fast channel signal is used as the time base signal, and the slow channel signal is used as the amplitude signal. The digital pulse amplitude is accurately estimated and the digital baseline is deducted, and the pulse amplitude size is obtained. In addition, a digital rise time discriminator is designed inside the FPGA. The relationship curve between the rise time value and the ratio of the fast and slow channel amplitudes is obtained through offline experiments, and stored in the internal memory of the FPGA. The parameter value is called during real-time operation, so that discrimination can be achieved within the digital rise time, thereby further improving the energy resolution of the detector. Then a symmetrical zero-area digital trapezoidal shaping algorithm is used to improve the energy resolution and pulse counting rate of the instrument.

[0022] In the process of digital multi-channel signal processing, the signal is firstly processed by analog pre-processing and then sampled by high-speed ADC. Digital trapezoidal shaping, pulse waveform identification, baseline recovery, pulse anti-pile-up processing and pulse amplitude analysis are realized in FPGA. Figure 2 shown.

[0023] According to the above-mentioned integrated digital energy spectrometer solution, an integrated tube-type digital energy spectrometer with 8k energy spectrum resolution output is completed. It is a high-performance digital energy spectrometer that integrates high-voltage power supply, preamplifier, main amplifier, and multi-channel analyzer. It is easy to use and powerful. In addition to energy spectrum analysis, it also has an oscilloscope mode, a shaped pulse viewing mode, and a particle mode with a timestamp. The energy spectrometer uses a high-speed and high-precision ADC to achieve analog-to-digital conversion, a trapezoidal shaping filter, a digital baseline restorer, a digital pulse anti-pile-up, and a count rate correction to achieve pulse filtering noise reduction and accurate amplitude extraction.

[0024] Furthermore, the dose rate probe adopts a Geiger Mueller detector.

[0025] Specifically, the range is 100nGy / h to 10Gy / h.

[0026] Furthermore, the visual SLAM camera adopts a 3D camera.

[0027] Specifically, the 3D camera is equipped with a new self-developed depth engine chip MX6600, which is more powerful. Based on the extensive application experience of the original Astra series cameras, the new monocular structured light 3D camera retains the original classic specifications such as FoV and depth measurement range, while fully upgrading the optical system, focusing on improving measurement accuracy and stability, and can provide stable depth measurement performance with RMSE < 1.5mm at 1m under various ambient temperatures.

[0028] The 3D camera provides real-time high-resolution depth measurement mode, with depth image resolution and frame rate up to 1600x1200@30fps. It also supports 1920x1080@30fps color image output, providing users with high-standard color and depth data. It is widely used in industry scenarios such as volume measurement, somatosensory interaction, and indoor scanning.

[0029] The 3D camera has powerful and rich functions: it supports the UVC protocol, providing users with a more convenient way of use; it supports hardware D2C, which aligns the depth information and color information space at different resolutions, saving the resources of the host computer; it supports inertial sensing function, which can sense the movement and rotation of the camera itself, thereby realizing the posture tracking function; it supports depth and RGB frame synchronization, as well as multi-machine synchronization function, flexible configuration and easy realization of multi-machine combination, solving the multi-machine interference problem that is common in 3D cameras, and expanding FoV and measurement range.

[0030] Furthermore, the scene fusion module includes: a three-dimensional reconstruction module, a radiation data space interpolation module and a data fusion module; wherein, 3D reconstruction module, used to perform real-time 3D scanning and map construction of the radiation area based on the 3D camera and visual SLAM camera; The radiation data space interpolation module is used to select a linear three-dimensional interpolation algorithm to perform three-dimensional space interpolation according to the collected radiation data; The data fusion module is used to fuse the interpolated radiation data with the three-dimensional point cloud model to generate a three-dimensional distribution model of radiation dose.

[0031] Furthermore, it also includes a main control panel, which serves as a control center and is responsible for coordinating the work of each module, processing data, and displaying the final three-dimensional radiation dose distribution model.

[0032] Furthermore, the main control tablet adopts a triple-proof reinforced tablet.

[0033] For details, see Figure 3 As shown, the main control tablet is a rugged and durable three-proof reinforced tablet. It has an Intel Core i5M5-6Y57 processor, and can be equipped with 1D / 2D barcode scanning, NFC / RFID, ID card, fingerprint and other data collection modules; it supports 4GLTE, WLAN, BT, and GNSS data communication RS232, RJ45 Ethernet, USB, HDMI I / O interface expansion; it is equipped with a 7.6V5000mAh removable large-capacity battery, with a battery life of about 9 hours and a continuous working time of about 3 hours; the system is IP67 dust and water resistant and can withstand a drop of 1.22m. The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nuclear decommissioning space radiation field modeling device, characterized in that: include: Radiation data acquisition module and scene fusion module; The radiation data acquisition module is connected to the input end of the scene fusion module and is used to perform three-dimensional scanning and radiation information acquisition on the nuclear radiation environment to obtain radiation data; A scene fusion module is connected to the output end of the radiation data acquisition module and is used to generate a three-dimensional distribution model of radiation dose according to the fusion of radiation data and the three-dimensional point cloud model; The radiation data acquisition module includes: dose rate probe, spectrometer probe, and visual SLAM camera; The scene fusion module includes: a 3D reconstruction module, a radiation data space interpolation module and a data fusion module; among them, 3D reconstruction module, used to perform real-time 3D scanning and map construction of the radiation area based on the 3D camera and visual SLAM camera; The radiation data space interpolation module is used to select a linear three-dimensional interpolation algorithm to perform three-dimensional space interpolation according to the collected radiation data; The data fusion module is used to fuse the interpolated radiation data with the three-dimensional point cloud model to generate a three-dimensional distribution model of radiation dose.

2. A nuclear decommissioning space radiation field modeling device according to claim 1, characterized in that: The spectrometer probe uses CZT or LaBr3 detector.

3. A nuclear decommissioning space radiation field modeling device according to claim 1, characterized in that: The dose rate probe uses a Geiger Mueller detector.

4. A nuclear decommissioning space radiation field modeling device according to claim 1, characterized in that: The visual SLAM camera uses a 3D camera.

5. The nuclear decommissioning space radiation field modeling device according to claim 1, characterized in that: It also includes a main control panel, which serves as the control center and is responsible for coordinating the work of each module, processing data, and displaying the final three-dimensional radiation dose distribution model.

6. A nuclear decommissioning space radiation field modeling device according to claim 5, characterized in that: The main control tablet adopts a triple-proof reinforced tablet.

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