在室人数与建筑用能系统紧密相关，实施在室人数的监测是建筑用能行为方向的热点问题之一。红外传感是现有研究方法中应用较广泛的方法，其测试精度与安装高度、人员通过速度及人员体型等因素有关，选取主动红外入侵探测器，依据建筑室内人员活动情况，研究了安装高度、通过速度及人员体型对在室人数测试精度的影响。研究结果表明，考虑各种人员体型及通过速度时，测试精度随安装高度的降低先升高后降低。通过速度越慢，测试精度越高，当v≥1.4m/s时，测试精度低于60%；当1.0m/s≤v<1.4m/s时，测试精度为70%~81%；当v<1m/s时，测试精度高于95%，当v<0.8m/s时，测试精度达到100%等。被测人员的身高和体重指数均与测试精度呈强正线性相关。通过不同工况分析，提出了应用于实际场景的综合精度的估算方法。

Occupancy is closely related to the building energy consumption system. Monitoring occupancy is one of the hot issues in the direction of building energy consumption behavior. Infrared sensing is a widely used method in existing research methods. Its measurement precision is related to installation height, personnel passing speed, personnel somatotype and other factors. The active infrared intrusion detector was selected to study the influence of installation height, passing speed and personnel somatotype on the measurement precision of occupancy according to the indoor occupants" activities. The research results show that the measurement precision first increases and then decreases with the decrease of the installation height when considering various personnel somatotype and passing speed. The slower the passing speed, the higher the measurement precision. When v ≥ 1.4m/s, the precision is less than 60 %; when 1.0 m/s ≤ v < 1.4 m/s, the precision is 70 % ~ 81 %; when v < 1m/s, the precision is higher than 95 %; When v < 0.8m/s, the precision is 100 %. The height and Body Mass Index of the tested people are positively correlated with the measurement precision. Through the analysis of different operating conditions, an estimation method of comprehensive precision applied to actual scenes is proposed.

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