基于AT89C2051单片机A/B信号选择模块

A/B Signal Switching Module Based on AT89C2051 MCU

随着油田开发的深入发展,水平井测井工艺不断更新,对绞车计量系统的要求也不断提高。由于在水平井测井过程中引进硬电缆和常规测井电缆的混合使用,深度计量打滑现象频频出现,为现场施工造成很大的困难。将深度计量系统改进为双计量轮,两个计量轮驱动两个编码器,同时开发了深度信号自动切换模块,对两组深度信号择优切换,进行整形放大输出。文中详细介绍了信号选择模块的软硬件实现,给出了原理框图、各关键部分硬件设计,同时给出部分程序。通过现场试验,本设计有效的减小由于计量轮打滑造成的深度误差,改善了测井质量,提高了现场施工效率。

With the further development of oilfield exploitation,the technology of the horizontal well logging updates constantly,which need the winch metering system to enhance unceasingly. Depth measuring instrument skidding phenomenon appears frequently because of the mixed using of different specifications logging cable in the process of horizontal well logging,which have caused huge difficulties for the onsite construction. The depth measurement system was improved by using double measuring wheels that driving two encoders. At the same time,a signal switching module was developed to contrast to choose the accurate depth signal automatically to output after shaping amplification. The implementing of hardware and software of the signal switching module was introduced,and the principle diagram and the hardware design of key parts were given with a part of the program. The field test showed that the design effectively reduced the error caused by measuring wheel skidding depth,which improved the quality of logging and the efficiency of the site construction.