Error analisis of passager flow based on the bi-directional flow ratio of the section in crowd gathering early-warning
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摘要: 針對密集人群的安全預警管理,結合商業街人流相向運動的特點,提出通過斷面雙向流量比進行人群聚集風險預警的思路,并對該方法的誤差進行了理論分析和實例驗證.結果表明該方法用于商業街聚集人群的風險預警時,不論測量值大于真實值還是測量值小于真實值,經過斷面進出比的比值誤差均比客流統計系統本身誤差更小,從而使客流統計產品在一定范圍內精確度有所提高.此外,可應用此方法根據實際要求的測量精度為客流統計設備選型提供依據.Abstract: An early warning method for the risk of crowd gathering based on the bi-directional flow ratio of the section was proposed according to the characteristics of the opposite movement of pedestrian flow at the business street. Its error was analyzed in theory and verified by an example.It is found that using this method as a criterion of crowded events is feasible.Whether the measured values are greater or less than the true values,the error of the ratio between the inward and the outward flow across the section is less than that from a pedestrian flow statistic system,so the method is helpful for improving the accuracy of crowd statistic tools to some extent.In addition,the method can be used as a reference in selecting the type of a pedestrian flow statistic system according to requirements for the measuring accuracy of actual applications.
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Key words:
- pedestrian safety /
- crowd gathering /
- passenger warning /
- safety engineering /
- error analysis
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