改进泰森多边形的UWB危化品仓储定位技术

摘要

Currently,manual palletizing stacking mode is mostly used in the storage warehouses of hazardous chemicals in our country. Although explicit requirements about five-distance ( stacking distance,distance from the wall,distance from the top, distance from the column,and distance of aisles) are issued by security administration department,there are no effective measures provided. The goods in hazardous chemicals warehouse can be well located by using ultra-wideband( UWB) technical measures to monitor the distance between stacks. Because the positioning accuracy of UWB cannot meet the administration requirement for hazardous chemicals warehousing at present,the correction method is needed. The Thiessen polygon vectors compensation method may improve the positioning accuracy of hazardous chemicals in the warehouse,while still some limitations exist. On the basis of analysis and experimental verification of these limitations,the improved Thiessen polygon vector correction method is proposed. Combining with the actual environment of hazardous chemicals warehouse,the not-equidistant reference points are selected,and the virtual reference points are setup to establish more Thiessen polygons, thus more accurate positioning of the goods is implemented. The tests show that the improved Thiessen polygon vector correction method can improve the positioning accuracy further;it is applicable to the regulatory of goods in hazardous chemicals warehousing.%我国危化品仓储库房大多采用人工码垛堆放的存储方式.安全监察部门对于货物堆垛五距(垛距、墙距、顶距、柱距和通道距)虽然有明确要求,但缺乏有效的监管手段.利用超宽带(UWB)技术手段可以较好地对库房中危化品货物进行定位,从而监测堆垛间距.但目前UWB定位精度不能很好地满足危化品仓储监管要求,需要一定的校正手段.泰森多边形矢量校正法可以提高危化品仓储中货物的定位精度,但也存在一定局限性.在分析并通过试验验证其局限性的基础上,提出了改进的泰森多边形矢量校正法.结合危化品仓储实际环境,选取不等距的参考点,同时设立虚拟参考点,构建更多的泰森多边形,能够实现更精准的危化品仓储货物定位.试验证明,改进的泰森多边形矢量校正法能有效提高定位精度,适用于危化品仓储的货物监管.