井下精确人员定位系统定位重测机制研究  

Research on positioning and re-measurement mechanism of underground precise personnel positioning system

作　　者：唐丽均[1] 吴畏[2] 刘世森 TANG Lijun;WU Wei;LIU Shisen(Big Data and Internet of Things School, Chongqing Vocational Institute of Engineering, Chongqing 402260, China;School of Intelligent Engineering, Chongqing City Management College, Chongqing 401331, China;CCTEG Chongqing Research Institute, Chongqing 400039, China)

机构地区：[1]重庆工程职业技术学院大数据与物联网学院,重庆402260 [2]重庆城市管理职业学院智能工程学院,重庆401331 [3]中煤科工集团重庆研究院有限公司,重庆400039

出　　处：《工矿自动化》2022年第1期103-108,共6页Journal Of Mine Automation

基　　金：国家重点研发计划资助项目(2018YFC0808303);重庆市教委科学技术研究项目(KJQN202003407);重庆工程职业技术学院院级课题(KJB202134)。

摘　　要：无线信号在井下传输过程中由于信号强度衰减和干扰导致读卡器与标志卡之间测距失败,当测距失败后,标志卡只能等到下一超帧内的固定测距时隙再次与读卡器进行测距,由于标志卡与读卡器进行重新测距的间隔时间较长,不利于及时掌控井下人员实时动态分布情况。针对该问题,提出了一种井下精确人员定位系统定位重测机制。当标志卡测距失败时,该定位重测机制利用空闲时隙,重新对标志卡进行测距。在出现多张标志卡竞争空闲时隙进行重测的情况下,采用层次分析法,根据标志卡的累计重测次数、信号强度、运动速度,确定标志卡抢占空闲时隙的重测优先级,定位读卡器根据重测优先级为测距失败的标志卡优先进行重测。测试结果表明,当标志卡数量少于70张时,定位重测机制能提高精确人员定位系统的平均测距成功率、降低平均重测延时、提升平均时隙利用率,从而能实时监测到不间断的标志卡运动轨迹。During the underground transmission of wireless signal,the measurement between card reader and marker card fails due to signal strength attenuation and interference.When the measurement fails,the marker card can only wait until the fixed measurement time slot in the next super-frame to measure the distance with the card reader again.As the marker card and the card reader re-measurement interval time is long,it is not conducive to control the real-time dynamic distribution of underground personnel in time.In order to solve this problem,a positioning and re-measurement mechanism of underground precise personnel positioning system is proposed.When the marker card measurement fails,the positioning and re-measurement mechanism uses the idle time slot to re-measure the marker card.When multiple marker cards compete for idle time slots for re-measurement,the hierarchical analysis method is used to determine the re-measurement priority of marker cards using idle time slots according to the accumulated re-measurement times,signal strength and movement speed of the marker cards.And the positioning card reader gives priority to the marker cards which fail in measurement according to the re-measurement priority level.The test results show that when the number of marker cards is less than 70,the positioning re-measurement mechanism can improve the average measurement success rate,reduce the average re-measurement delay,improve the time average slot utilization rate,and enable to monitor the uninterrupted marker card movement track in real time.

关 键 词：井下精确人员定位 测距时隙 定位重测机制 空闲时隙 读卡器 标志卡 

分 类 号：TD76[矿业工程—矿井通风与安全]