5 results about "Nuclear electronics" patented technology

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 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.