反应堆中子脉冲信号预处理系统研制

Development of Pre-processing System for Neutron Pulse Signal of Reactor

摘要:

针对目前反应堆中子脉冲信号预处理系统信号传输干扰大和参数调节稳定性差的问题,设计出一种集成前置放大器、脉冲主放大器和高压电源为一体,具备智能调节控制参数的低噪声反应堆中子脉冲信号预处理系统。采用集成化与模块化技术,系统根据功能不同分为预处理装置和调节控制盒,其中预处理装置包括脉冲放大模块、参数调节模块、低压电源模块和高压电源模块。采用智能化调节技术,设计了基于SPI总线的远程软件参数设置功能,利用数字电位器实现无按键智能调节脉冲放大甄别阈和中子探测器工作高压。试验结果表明,该系统能有效便捷地获取关键工作参数,满足了核测设备的数采装置获取准确中子计数率的要求。

Abstract:

Aiming at the problem of large interference in signal transmission and poor stability of parameter adjustment, a new neutron pulse signal pre-processing system is designed. This system has the function of adjusting parameters intelligently, and is integrated as a whole with the preamplifier, pulse main amplifier and high voltage power supply. Using integrated and modular technology, the system is divided into pre-processing device and adjustment control box according to different functions; the pre-processing device includes pulse amplifier module, parametric adjustment module, low voltage power supply module and high voltage power supply module. Using intelligent regulation technology, the remote software parameter setting function based on SPI bus is designed, and meanwhile, the digital potentiometer is introduced for keyless adjusting the screening threshold and high voltage. The test results illustrates that this system can effectively and conveniently acquire the key working parameters, and satisfies the requirement of acquiring accurate neutron counting rate by data acquisition device of nuclear measurement equipment.