[1]胡永建.有保护时隙的高效PPM钻井液脉冲信号编码[J].石油钻探技术,2018,46(06):118-122.[doi:10.11911/syztjs.2018145]
 HU Yongjian.New PPM Coding with Protection Time Slots for Optimizing the Drilling Fluid Pulse Signal for High Energy Efficiency[J].Petroleum Drilling Techniques,2018,46(06):118-122.[doi:10.11911/syztjs.2018145]
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有保护时隙的高效PPM钻井液脉冲信号编码(/HTML)
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《石油钻探技术》[ISSN:1001-0890/CN:11-1763/TE]

卷:
46卷
期数:
2018年06期
页码:
118-122
栏目:
测井录井
出版日期:
2018-11-25

文章信息/Info

Title:
New PPM Coding with Protection Time Slots for Optimizing the Drilling Fluid Pulse Signal for High Energy Efficiency
作者:
胡永建
中国石油集团工程技术研究院有限公司, 北京 102206
Author(s):
HU Yongjian
CNPC Engineering Technology R & D Compcmy Limited, Beijing, 102206, China
关键词:
钻井液脉冲信号脉冲位置调制编码效率节电效率保护时隙
Keywords:
drilling fluidpulse signalpulse position modulationcoding efficiencypower saving efficiencyprotection time slot
分类号:
TE927
DOI:
10.11911/syztjs.2018145
摘要:
为了提高井下数据的传输速率,降低电池能耗和脉冲发生器动作频次,需要研究并选择具有高编码效率和节电效率的钻井液脉冲信号编码方法。为此,选择具有较高节电效率的脉冲位置调制(PPM)编码方法,分别计算了有不同数量保护时隙的多脉冲位置调制(MPPM)与差分脉冲位置调制(DPPM)的编码效率和节电效率。计算结果表明:MPPM的编码效率随着待编码信息位数增加而升高,而DPPM编码信息位数可以取定值来实现组合编码;在待编码信息位数较少的情况下,DPPM编码、译码算法更易实现,有更高的编码效率及节电效率,在保护时隙数量为2时,DPPM编码效率可达46.2%,节电效率可达84.6%。研究结果表明,有保护时隙的DPPM编码具有较高的编码效率及节电效率,其编码映射方法更简单,是适合钻井液脉冲信号的高效编码方法。
Abstract:
In order to improve the transmission rate of downhole data and increase battery life and the frequency of drilling fluid pulser action,it is necessary to study and select the drilling fluid pulse signal coding method with high coding efficiency and energy saving efficiency.The coding efficiency and energy saving efficiency of multi-pulse position modulation(MPPM)and differential pulse position modulation(DPPM) with different number of protection time slot are calculated by high efficient pulse position modulation coding(PPM) methods. By comparing the calculation results of MPPM and DPPM,it is found that the coding efficiency of MPPM increases with the number of information and DPPM has the fixed information digits number to implement combinatorial coding.In the case that the number of bits of information to be encoded is small,DPPM has fewer bits of information to be encoded,and its encoding and decoding algorithms are easier to implement.Further,it has higher encoding and power saving efficiency.When the number of protection time slot is 2,the coding efficiency of DPPM can reach 46.2% and the energy saving efficiency can reach 84.6%.The research results show that DPPM coding with a protection time slot has high coding and energy saving efficiency,as its coding mapping method is simpler.It is an efficient coding method suitable for applying to the drilling fluid pulse signal.

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备注/Memo

备注/Memo:
收稿日期:2018-04-13;改回日期:2018-10-04。
基金项目:国家科技重大专项"深井高速信息传输钻杆技术与配套装备研究"(编号:2016ZX05020-005-001)部分研究内容。
作者简介:胡永建(1970-),男,河南商水人,1992年毕业于西安交通大学应用物理专业,1995年获北京大学凝聚态物理专业硕士学位,高级工程师,主要从事石油钻井井下仪器及通讯设备的研制工作。
E-mail:huyongjian32788@163.com。
更新日期/Last Update: 1900-01-01