In order to study the effects about the roadside landscape of prairie highway on drivers' heart rate variability (HRV), the real road test is conducted on the prairie highway.The drivers' ECG signal is collected by multiple physiological recorder MP150 in the process of driving.Combined with the theoretical research of physiology and ergonomics etc., based on the time and frequency domain analysis of HRV, the drivers' HRV is analyzed on the different roadside landscape environment.The results show that the drivers' RMSSD which is time domain index of R-R phase present smooth fluctuations in smaller scale and there is no significant difference between the average on the two types of roadside landscape.The LF/HF present more larger change in landscape Ⅱ and there is a significant difference between the average on the two types of roadside landscape.The drivers' mental load is larger relatively on monotonous roadside landscape.%为了研究草原公路路侧景观的变化对驾驶员心率变异性的影响,在草原公路上进行实地行车试验.运用多导生理记录仪MP150实时记录心率参数,采集驾驶员行驶过程中的心电信号;结合生理学和人机工程学等方面的理论研究,利用心率变异时频域分析方法,对驾驶员在不同路侧景观环境下的心率变异(HRV)进行分析.研究结果表明:在两种景观下,驾驶员的时域指标R-R间期差值的均方根(RMSSD)在较小范围内平稳波动,其平均值之间无显著差异;在景观Ⅱ中低频与高频比值(LF/HF)变化较大,两种景观下的平均值之间有显著差异;驾驶员在相对单调的路侧景观路段精神负荷较大.
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