声卡信号采集系统的设计及其在发光材料测试上的应用  

Design of Sound Card Signal Sampling System and Its Application in Test of Luminous Materials

作　　者：曾志军[1] 谭剑[1] 

机构地区：[1]湖南师范大学计算机教学部,湖南长沙410006

出　　处：《计算机与现代化》2004年第12期36-38,共3页Computer and Modernization

摘　　要：讨论了化学发光材料的余辉延时时间曲线特性,提出用计算机声卡采集发光材料相关数据并自动绘制曲线的一种方法。原理上首先利用线性调幅电路将光电管检测到的电信号的频谱移动到声卡所能采集的范围内,通过声卡采集后,利用软件进行调幅信号的检波和解调,从而恢复原始信号。进而采用计算机进行数据存储、运算和研究。This paper discusses the character of the remaining luminescence delay-time curve of chemistry luminous materials and presents a method to sample data of luminous materials by using computer sound card to draw the curve automatically.Firstly,the frequency of the electricity signal examined by photoelectric element is adjusted to the range which can be sampled for sound card by using linear AM circuit.After the AM signal is sampled,it is restored to origin signal by program.And then the signal can be stored and computed.

关 键 词：声卡 采集系统 发光材料 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]