电子称实验electronic scale‘s experiment
use 4 strain gauge to design a scale, which can measure weight and show it on voltmeter
悬臂梁——应变片——桥电路——仪用放大INA128——增益调整电路——电压表cantilever——strain gauge——bridge—— instrument amplifier——amplification adjust circuit——volt meter
测量特性曲线measure characteristics curve
位移传感器实验displacement sensor experiment
电路设计
1、位移与电感成正比displacement in proportion to inductance2、输出电压与电感成正比output voltage in proportional to inductance
变压式位移传感器 transformer displacement transducer
波形发生 sine wave generator功放电路 power amplification circuit精密整流 rectification circuit滤波 filtering circuit差分放大 differential amplification circuit整定电路 setting circuitA/D 0～3.3VFPGAD／A
焊接电路板PCB welding
软件设计
已有从A/D到数码管显示程序，需改为用LED显示already have the program which from A/D to nixie tube displaywhat i have to do is to change it use LED screen to display
after we get the value of AD16 BCD codefirst 4 bit is sign bit next is A／D resultlook up the tablefind the character that should be displayed
