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地面与井下的信息通道是实现“井眼轨迹遥控系统”的必要条件．上行通道的随钻测量系统已是全球性的商品，而下行通道目前仍然没有成熟的产品．笔者就是在下行通道系统总体方案的基础上，对其硬件的设计与实现予以分析和讨论．根据井下钻井与停钻时，在钻头附近产生的振动能量相差很远这一基理，确定了下行通道电路的设计思想，并设计了井下振动传感器电路，信号调理电路和ＣＰＵ工作电路，与硬件的工作相匹配的软件方案，对下行通道的各部分电路的功能和实现给予了详尽的分析和讨论．振动台模拟实验结果表明，电路设计正确，选件得当．
Ground and underground information access is to achieve “wellbore trajectory remote control system,” the necessary conditions. Upstream channel MWD measurement system is a global commodity, while the downlink channel is still not mature products. The author is in the downlink channel system based on the overall program, the design and implementation of its hardware to be analyzed and discussed. According to the basic principle that the vibration energy generated near the drill bit is very far down when drilling and drilling downhole, the design idea of down channel circuit is confirmed and the downhole vibration sensor circuit, signal conditioning circuit and CPU working circuit are designed, and the hardware Work to match the software program, the downlink channel of each part of the circuit functions and implementation gave a detailed analysis and discussion. Shaking table simulation results show that the circuit design is correct, the options properly.