A novel autonomic activation measurement method for stress monitoring: non-contact measurement of heart rate variability using a compact microwave radar
A novel autonomic activation measurement method for stress monitoring: non-contact measurement of heart rate variability using a compact microwave radar
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DOI：
10.1007/s11517-007-0298-3
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发表时间：
2008-07-01
影响因子：
3.2
通讯作者：
Kawakami, Mitsuyuki
中科院分区：
文献类型：
--
作者：
Suzuki, Satoshi;Matsui, Takemi;Kawakami, Mitsuyuki
我们开发了一种新的方法，用于通过椅背非接触式监测压力引起的自主神经激活，使用紧凑的24 GHz微波雷达（8 x 5 x 3 cm），无需大型设备，并给受监测的个人带来沉重的负担。在120 s的静默期后，使用95 dB的2，120 Hz和2，130 Hz正弦波的复合音调进行120 s的音频刺激。从背部，反映交感-迷走神经平衡的HRV的LF/HF由微波雷达用最大熵法测定8名志愿者（平均年龄23 ± 1岁）。平均LF/HF测量的非接触和接触（使用心电图作为参考）的方法在音频刺激期间增加34%和37%，分别与沉默期相比。接触和非接触测量之间的最大互相关平均为0.73 +/- 0.10。我们的方法似乎是有前途的未来监测应力引起的自主激活的操作员，并可能减少应力引起的事故。
We developed a novel method for non-contact monitoring of stress-induced autonomic activation through the back of a chair, using a compact 24 GHz microwave radar (8 x 5 x 3 cm), without large-scale equipment and placing a heavy burden on the monitored individual. Following a silent period of 120 s, audio stimuli using a composite tone of 2,120 and 2,130 Hz sine-waves at 95 dB were conducted for 120 s. From dorsal, LF/HF of HRV reflecting sympatho-vagal balance was determined by microwave radar with the maximum entropy method using eight volunteers (mean age 23 +/- 1 years). Mean LF/HF measured by non-contact and contact (using electrocardiography for reference) methods during audio stimuli increased 34 and 37%, respectively, as compared with those of the silent period. Maximum cross-correlations between contact and non-contact measurements averaged 0.73 +/- 0.10. Our method appears to be promising for future monitoring of stress-induced autonomic activation of operators and may reduce stress-induced accidents.