10 results about "Nuclear electronics" patented technology

The invention provides a pulse passing rate improving method based on accumulation signal demodulation, and belongs to the technical field of nuclear electronics digital pulse processing. Comprising the following steps: performing baseline deduction and monopulse screening on a radiation field pulse signal; constructing a nuclear pulse signal model, fitting to obtain model parameters, and constructing a system response matrix; modeling a nuclear detection physical process into a mathematical model; solving a constraint optimization problem by using a non-negative least square method; and demodulating and calculating all the pulse signals including the stacked pulses which are discarded by stacking, so as to obtain delta pulses containing energy information. According to the invention, the accumulation signal which is abandoned by a traditional accumulation abandoning algorithm is demodulated, so that the technical problem of increasing the pulse passing rate is solved, and meanwhile, heavy peaks and high-energy trailing in an energy spectrum are inhibited. Compared with an existing accumulation discarding method, the pulse passing rate effect is remarkably improved on the premise that the energy spectrum accuracy is guaranteed.

The invention relates to a copper cluster scintillator constructed on the basis of diphenyl-2-pyridine phosphine and cuprous iodide and a preparation method and application of the copper cluster scintillator. The preparation method comprises the following steps: constructing a copper cluster scintillator by using diphenyl-2-pyridine phosphine and cuprous iodide, and preparing the copper cluster scintillator into a semitransparent scintillator film by using polyvinylpyrrolidone as a high-molecular polymer matrix and polyethylene glycol terephthalate as a spin-coating substrate; the scintillator film and a photomultiplier are optically coupled and integrated with nuclear electronics equipment to develop an alpha / beta particle pollution monitor. The copper cluster scintillator provided by the invention has excellent X-ray luminescence performance, and can realize high-sensitivity scintillation response to alpha / beta particles; the surface pollution monitor can realize sensitive detection of alpha / beta particles in the environment, and has important application value in the field of environmental radiation detection.

The invention discloses a nuclear electronic signal low-noise amplification, high-speed sampling and real-time reconstruction system, which is characterized by comprising a low-noise amplification module, a high-speed sampling module and a real-time reconstruction module, the low-noise amplification module is used for carrying out low-noise amplification on nuclear electronic signals, the high-speed sampling module is used for carrying out high-speed sampling on the amplified nuclear electronic signals, and the real-time reconstruction module is used for carrying out real-time reconstruction on the sampled signals; low-noise amplification is achieved, and signal quality is improved: the low-noise amplification module of the system adopts a multi-stage amplification design, and by reasonably matching parameters of each stage of amplification circuit, noise introduced in the amplification process of each stage can be effectively suppressed while nuclear electronic signals are amplified. High-speed accurate sampling is achieved, signal details are captured, real-time efficient reconstruction is achieved, and data pressure is reduced; the signals are preprocessed and optimized, and the processing effect is enhanced; dynamic intelligent regulation and control are achieved, and complex environments are adapted.

The invention relates to a wearable thyroid counter system and device and a design method. A detector module faces a neck thyroid and is used for receiving gamma rays emitted by iodine-131 in the neck thyroid and converting the gamma rays into optical signals; the detector module comprises a first detector and a second detector which correspond to a left thyroid lobe and a right thyroid lobe respectively, and an included angle exists between the first detector and the second detector; the nuclear electronics module is used for converting the optical signal into an electric pulse signal and then converting the electric pulse signal into a measurement energy spectrum; the spectrum analysis module is used for receiving the measurement energy spectrum to determine activity information of the left thyroid lobe and the right thyroid lobe. The first detector and the second detector can clearly reveal asymmetry of lesions distributed on the two sides of the thyroid gland, and meanwhile, real-time background signals are obtained through the detector module on the resection side under the condition that the thyroid gland on one side of a patient is resected, so that data monitoring on the other side is more accurate. The angle of the included angle is adjusted, the thyroid is accurately positioned, and the accuracy of follow-up measurement can be improved.

The present invention discloses an artificial intelligence-based multi-channel nuclear electronics data acquisition system, which relates to the technical field and includes front-end preprocessing of nuclear radiation or X-ray signals input from each detection channel; extracting features from the preprocessed signals using a deep neural network and integrating them to form a multidimensional state vector describing the channel state; inputting the multidimensional state vector into a deep reinforcement learning module to determine the sampling parameters of each channel; establishing a correlation model for the dependencies between the signals in each channel; implementing cross-compensation for channels in abnormal states by calculating and applying correction factors through a prediction method; and jointly adjusting the sampling parameters using a self-evolving multi-task optimization algorithm based on real-time feedback data to form a closed-loop data acquisition and control unit. This system can achieve automatic joint optimization of multi-task and multi-objective parameters, solving the problem that traditional methods cannot simultaneously consider real-time performance, stability, and multi-objective optimization.

The utility model discloses a dual-channel nuclear pulse acquisition daughter card based on a JESD204B interface, which adopts a dual-channel high-speed ADC (analog-to-digital converter) chip based on the JESD204B interface as a core module of hardware design, and selects a universal MCX connector in the industry as an input interface of two paths of analog pulse signals. Wherein one path of pulse signal enters the ADC for sampling through the alternating current coupling transformer driving module, the other path of pulse signal enters the ADC for sampling through the direct current coupling amplifier driving module, and a high-integration positive and negative power supply module is designed to provide working voltage for a hardware system, so that nuclear electronics data acquisition with two channels, 14-bit sampling precision and 1 GHz sampling rate is realized; and the nuclear pulse signal data acquisition capability of a nuclear electronics system can be greatly improved.

The present application relates to nuclear radiation detection and nuclear electronics technical field, specifically to a kind of radiation field dose self-discrimination detection system and method;It contains double-channel signal acquisition circuit, phase space mapping and manifold curvature entropy analysis module;System utilizes original signal and analog differential signal to construct real-time phase space trajectory, and introduces reference particle attractor model;Its core is to calculate trajectory manifold curvature entropy and carry out hierarchical discrimination: low entropy is determined as single particle, high entropy is determined as accumulation distortion and triggers inverse calculation repair process to deconstruct it;Finally, the energy is updated dose library by phase space closed loop volume integral calculation;The present application uses hardware differentiation to avoid digital quantization noise, ensures that trajectory topological surface is smooth, and significantly improves the measurement accuracy under high dynamic range.

The application provides a low-noise baseline recovery circuit, and belongs to the technical field of nuclear electronics. The low-noise baseline recovery circuit comprises a signal input circuit, a pre-amplification circuit, a signal output circuit and a baseline automatic zeroing circuit. The baseline automatic zeroing circuit comprises a direct current component extraction circuit, a buffer circuit and a differential amplification circuit. The signal input circuit is connected to the direct current component extraction circuit through the pre-amplification circuit. The buffer circuit and the pre-amplification circuit are respectively connected to differential input ends of the differential amplification circuit. An output end of the differential amplification circuit is connected to the signal output circuit. The baseline recovery circuit is simple to debug, can achieve the purpose of baseline recovery in actual verification, and has a signal-to-noise ratio superior to that before input. Due to bandwidth limitation, the signal-to-noise ratio is slightly improved, input and output buffers are added, the circuit has certain amplification function, and has strong load capacity.

The invention relates to the technical field of nuclear radiation detection and nuclear electronics, in particular to a radiation field dose self-discrimination detection system and method. The system comprises a dual-channel signal acquisition circuit and a phase-space mapping and manifold curvature entropy analysis module. The system constructs a real-time phase space trajectory by using an original signal and an analog differential signal, and introduces a reference particle attractor model; the core of the method is to calculate a trajectory manifold curvature entropy for graded discrimination: a low entropy is judged to be a single particle, a high entropy is judged to be stacking distortion, and an inverse calculation repair process is triggered to deconstruct the single particle; and finally, calculating an energy update dose library through phase space closed-loop volume integration. According to the method, digital quantization noise is avoided by using hardware differential, the trajectory topology is ensured to be smooth, and the measurement precision in a high dynamic range is remarkably improved.

The application provides a kind of thyroid I-131 activity measurement system based on double-layer detector, for measuring I-131 activity in human thyroid, comprising: double-layer detector, for receiving the gamma ray emitted by I-131 to outside the body and converting the gamma ray into optical signal, with front and rear end CsI (TI) crystal and rear end CsI (TI) crystal arranged in front and rear adhesion;Nuclear electronics equipment, used with double-layer detector, for converting optical signal into electrical signal;Annular band, for fixing adhesion in human neck, with double-layer detector and nuclear electronics equipment arranged inside;Spectrum analysis module, for analyzing according to electrical signal, to obtain the energy spectrum of gamma ray;Detection efficiency calibration module, for calibrating the detection efficiency of double-layer detector, including OTT calibration unit and detection efficiency calibration unit;Energy spectrum analysis module, for analyzing the energy spectrum of gamma ray received by double-layer detector after calibration to obtain I-131 activity.