基于PIC单片机的随钻声波测井仪电源管理设计

为了保证随钻声波测井仪在井下长时间高效率工作,需要对电源管理板进行高效管理;根据随钻声波测井仪电子系统的供电特点设计了电源管理控制电路,低功耗微处理器PIC单片机根据随钻测量系统的指令对电源电路开关阵列进行控制,通过CAN-UART对主控板进行工作参数下发,利用实时钟电路提供的时间信息完成对井深和井下存储数据的映射,实现对随钻测井仪间歇式定时工作目的;实验测试结果表明,电源控制电路功耗为0.116 W,开关通断时间为微秒级,输出电压稳定;经实际应用满足了随钻声波测井仪的实际工作需求。

In order to ensure that the acoustic logging while drilling tool works efficiently for a long time,it is necessary to manage the power management board efficiently.A power management and control circuit is designed according to the power supply characteristics of the electronic system of acoustic logging while drilling.The low-power microprocessor PIC MCU controls the switch array of the power circuit on the basis of the instructions of the while drilling measuring system.Transmits the working parameters into the main control board through CAN-UART.And maps the well depth and downhole storage data by using the time information provided by the real-time clock circuit for the purpose of intermittent timing operation of logging while drilling tool.The experimental results show that the power consumption of the power supply control circuit is 0.116 W,the on-off time of the switch is microsecond,and the output voltage is stable.Satisfies the actual working requirement of acoustic logging while drilling tool through practical application.