微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2013年
18期
20-22
,共3页
微弱电压测量%TMS320F2812%ADC%CAN 总线
微弱電壓測量%TMS320F2812%ADC%CAN 總線
미약전압측량%TMS320F2812%ADC%CAN 총선
weak voltage measurement%TMS302F2812%ADC%CAN bus
针对过套管电阻率测井仪在测量领域的实际需求，设计了微弱电压采集系统，包括以TMS320F2812为核心的控制电路，高性能、高放大倍数、低噪声的前置放大电路，24 bit 高精度 A/D 转换器。最后以套管作为实验载体搭建了实验平台，通过改变模拟电阻盒的阻值进行电压测量，并且通过计算得出了测量电阻的阻值。
針對過套管電阻率測井儀在測量領域的實際需求，設計瞭微弱電壓採集繫統，包括以TMS320F2812為覈心的控製電路，高性能、高放大倍數、低譟聲的前置放大電路，24 bit 高精度 A/D 轉換器。最後以套管作為實驗載體搭建瞭實驗平檯，通過改變模擬電阻盒的阻值進行電壓測量，併且通過計算得齣瞭測量電阻的阻值。
침대과투관전조솔측정의재측량영역적실제수구，설계료미약전압채집계통，포괄이TMS320F2812위핵심적공제전로，고성능、고방대배수、저조성적전치방대전로，24 bit 고정도 A/D 전환기。최후이투관작위실험재체탑건료실험평태，통과개변모의전조합적조치진행전압측량，병차통과계산득출료측량전조적조치。
For the actual needs of through casing formation resistivity logging in the measurement fields , this paper designs a weak voltage measurement system , including the control circuit which is based on the TMS320F2812 , high performance , high magni-fication and low noise preamplifier circuit , and 24 bit high precision A/D converter . Using the casing as the experimental carrier , an experimental platform is built to measure the weak voltage by changing the resistance . And at last , the value of measured resis-tance is gotten by calculating.
