摘要
基于氡及其子体衰变放出的α射线能使空气分子电离的现象,设计新型空气脉冲电离室传感器,主要由电离室、中心电极和保护环组成。采用前置放大器和RC-CR带通滤波器把来自电离室的微弱信号进行放大,再经过脉冲甄别器与给定的阈值电压比较,最终转换成数字量信号。现场应用结果表明:该传感器具有广泛的应用价值。
A new type of sensor of air pulse ionization chamber is designed, based on the phenomenon that α-rays decayed by radon and its progeny can ionize the air molecules ,consists of ionization chamber ,central electrode and guard ring. Using the preamplifier and RC-CR bandpass filter, the weak signals from ionization chamber are amplified, and compared with the threshold voltage. These signals have been processed into digital signals. Practical applications show that the sensor has wide.application.
出处
《传感器与微系统》
CSCD
北大核心
2011年第11期86-88,共3页
Transducer and Microsystem Technologies
关键词
电离室
中心电极
保护环
3DJ7F
ionization chamber
central electrode
guard ring
3DJ7F
