【摘要】 路面γ辐射监测仪是一种用于对核设施和核电厂内路面和周围环境的放射性污染进行监测的车载放射性监测设备,可以实现对核设施和核电站厂区各处的放射性污染的及时快速监测。文章着重介绍了大面积塑料闪烁体(长1000mm×宽500mm×厚50mm)在路面辐射监测中的应用、数字化模拟放大电路的设计,及通过RS485总线方式传输探测信号的技术。并对路面辐射监测技术设计的重点如等速测量、恒温控制、工艺设计等方面做了进一步的阐述。更多还原

【Abstract】 The mobile roadway gamma monitor is described in this paper.This system is developed to meet requirements to survey roadways for gamma contamination in nuclear power plants and other nuclear fa- cilities.The system consists of a four wheel electric utility vehicle,two detector modules and a MCU based controller.The detector module consists of a lead shielded large area plastic scintillator(1000 500 50 mm),a PMT and amplifier unit,a MCU based counting unit,and a semiconductor cooler.The detec- tor module and controller unit are connected with RS-485 bus.When a survey starts,the controller unit takes control of the vehicle speed,displays the measurement data,and will switch on the semiconductor cooler when the temperature of detector module is higher than a set point.更多还原