Remote Detection of Psychological Stress [JHAPL_FY05_090]

心理压力远程检测[JHAPL_FY05_090]

• 批准号: 0515869
• 负责人: Richard Cohen
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0515869&HistoricalAwards=false
• 关键词: Remote; Detection; Psychological; Stress; JHAPL_FY05_090

The aim of this research project is to investigate the feasibility of surreptitiously detecting elevated stress levels in a subject during questioning by remote, non-contact measurement of changes in heart rate, heart rate variability and respiration using small, concealable, microwave-Doppler-based sensors. The use of covert sensing of physiological indices could minimizeor even eliminate the use of countermeasures by the subject, while providing the ability to measure the dynamical changes of heart rate ("heart rate variability" or HRV) that reflect the activity of the autonomic nervous system (ANS), which is measurably altered during mental provocation. Miniaturized microwave-based systems also have potential medical applications, such as non-contact monitoring of vital signs at a bedside, for burn victims and for research, where the discomfort associated with electrocardiographic (ECG) leads may interfere with a study, as might occur in sleep apnea research when a subject's discomfort alters normal sleep habits. Previous work, has demonstrated the efficacy of microwave-Doppler sensing to measure respiration, pulse rate and eye blinks. The case of "uncooperative" subjects has received little attention. In order for a microwave-based system to be useful in realistic settings, several issues related to uncooperative subjects must be addressed concerning signal and noise variability arising from: (1) sudden, unpredictable subject movements, (2) variation of signal with location on the thorax and the angle of incidence, and (3) fluctuation of the distance between the sensor and the subject with time. Remote detection serves a number of medical purposes, including in burn patients which standard sensors of heart variability are in themselves stressful.

该研究项目的目的是调查在询问期间通过使用小型、可隐藏的微波多普勒传感器远程、非接触式测量心率、心率变异性和呼吸变化来秘密检测受试者压力水平升高的可行性。生理指标的隐蔽感测的使用可以最小化或甚至消除受试者对对策的使用，同时提供测量心率的动态变化（“心率变异性”或HRV）的能力，所述心率的动态变化反映自主神经系统（ANS）的活动，所述自主神经系统在精神激发期间可测量地改变。小型化的基于微波的系统也具有潜在的医学应用，例如在床边对生命体征的非接触式监测，用于烧伤患者和用于研究，其中与心电图（ECG）导联相关联的不适可能干扰研究，如当受试者的不适改变正常睡眠习惯时在睡眠呼吸暂停研究中可能发生的那样。先前的工作已经证明了微波多普勒传感测量呼吸、脉搏率和眨眼的功效。“不合作”受试者的情况很少受到关注。为了使基于微波的系统在现实环境中有用，必须解决与不合作受试者有关的几个问题，这些问题涉及由以下引起的信号和噪声变化：（1）突然的、不可预测的受试者运动，（2）信号随胸部上的位置和入射角的变化，以及（3）传感器与受试者之间的距离随时间的波动。 远程检测服务于许多医疗目的，包括在烧伤患者中，心脏变异性的标准传感器本身是有压力的。