摘要
给出一种基于频-压转换器和对数运算放大器的钢丝绳信号自动增益和等空间采集电路,测试结果表明该电路可方便地消除钢丝绳探伤中检测速率对线圈传感器输出的影响,避免信号在A/D输入端产生饱和。设计了基于FPGA和DSP的多传感器(霍尔传感器阵列)钢丝绳检测系统,给出了由FPGA产生多通道模拟开关和A/D控制时序的仿真结果,表明系统可以实现多路信号的等空间采样。
Presented an auto-gain wire rope detection circuit with frequency-to-voltage converter and logarithm operational amplifier, as well as its simulation and testing result, which indicates that this auto-gain circuit can eliminate the detection velocity factor from the wire rope signal based on inductive coil senser.Proposed a detection system with Hall effect device array based on FPGA and DSP, the control signal of CMOS analog multiplexer and A/D generated by FPGA was simulated in FPGA development software of Quartus Ⅱ, and the simulation result indicated that the spatial domain sampling of multi-channel signal from Hall effect device array can be implemented in this detection system.
出处
《仪表技术与传感器》
CSCD
北大核心
2006年第3期40-42,共3页
Instrument Technique and Sensor
关键词
频-压转换器
对数运算放大器
钢丝绳无损检测
等空间采样
frequency-to-voltage converter
logarithm operational amplifier
nondestructive testing of wire rope
spatial domain sampling
