摘要
本文用普通的16位声卡设计了一种简单的双通道虚拟示波器．它能正确地采集音频±1V以内的信号．对超出范围的信号可通过衰减电路衰减到量程内．通过LABVIEW自身提供的声音函数调用声卡显示输入信号的波形。利用声卡的左右双声道在PC上配置多块声卡并行工作能够采集多个通道的信号．因而用声卡构建低成本的数据采集系统是切实可行的。
This article designs a kind of simple double channel oscilloscope with the ordinary 16 sound card. It can gather the signal within ±1v of audio frequency correctly, the electric circuit can weak the big signal to the measuring range. Transfer through LABVIEW sound function that oneself offer sonic card can show the wave form of the input signal. Utilizing left and right sides pairs of sound channel of sound card to dispose many pieces of sonic card walk abreast job can gather a lot of multi-channel signal. Therefore the data acquisition system structuring the low cost with the sonic card is really feasible.
出处
《仪器仪表用户》
2006年第2期69-70,共2页
Instrumentation
关键词
声卡
示波器
数据采集系统
sound card
oscilloscope
data acquisition system
