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本文提出一种基于VFC(电压—频率变换器)进行模数转换的新型多功能数据采集系统。其优点是:兼有模拟量输入通道的隔离功能;在百余米距离外,仍可准确地传送信号;用户可按要求在16位内自编程选择某通道参数模数转换结果的位数;可直接用于任何类型计算机,通用性甚强;线性度、重复性好;可取替某些二次仪表,从而降低系统造价。
This paper presents a new type of multi-function data acquisition system based on VFC (voltage-frequency converter) for analog to digital conversion. The advantages are: both analog input channel isolation function; at a distance of more than 100 meters, the signal can still be accurately transmitted; the user can be programmed within 16-bit self-programming to select a channel parameters analog-digital conversion results median; Can be used directly on any type of computer, very versatile; linearity, repeatability; can replace some of the second instrument, thereby reducing system cost.