有前途的

Mohs hardness of not less than 7, moderate in 6% of the non-flammable mineral materials , fineness of up to 600-3000 mesh.

莫氏硬度不低于7级，适度在6%以下的非易燃矿产物料，细度可达600-3000目。

Because the Hall probe circuit, magnetic-flux meter circuit and extension measurement circuit share the same A/D converter, but MAX110 only have two channel, so the system use CD4052. CD4052 is the analog switch controlled by microcomputer, which can switch the three input channels. The singles is passed to microcomputer after A/D converted.

所有与模拟电路有关的低频接口控制线都采用光电耦合器TPL521进行隔离，而频率较高采用6N137构成单片机相关外围器件的隔离，以便抑制数字电路的尖脉冲和其他噪声对模拟电路产生干扰，提高系统的信号噪声比。