Development of a Non-Contact Sensing Method for Scratching Activity Measurement
Development of a Non-Contact Sensing Method for Scratching Activity Measurement
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DOI：
10.1109/jsen.2013.2264283
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发表时间：
2013-09-01
影响因子：
4.3
通讯作者：
Watanabe, Kajiro
中科院分区：
文献类型：
--
作者：
Kurihara, Yosuke;Kaburagi, Takashi;Watanabe, Kajiro
伴有瘙痒的皮肤病的严重程度与瘙痒的频率有关；因此，总抓挠时间与总测量时间的比率（TST[%]）是诊断特应性皮炎等皮肤病的有用指标。为了掌握患者TST[%]的趋势，每天监测抓挠动作是有效的，但重要的是在不受约束的条件下进行测量，以免给患者带来负担。在本文中，我们提出了一种非磨损传感方法，用于测量患者睡眠时的抓挠运动。该方法中使用的传感装置由夹在两块金属板之间并放置在床腿下方的压电陶瓷传感器组成。该传感装置能够测量刮擦运动产生的微振动。在进行验证实验时，使用所提出的传感装置获得 TST [%]。然后将结果与从传统的、更受限制的测量方法（例如肌电图、陶瓷片、麦克风、应变仪、加速度传感器和陀螺仪传感器）获得的 TST [%] 进行比较。因此，位于受试者头部附近（刮擦点更靠近）的传感装置能够以几乎与传统方法相同的精度确定 TST [%]，而传统方法显示出所有传统传感器中精度最高的 TST [%]。
The severity of skin diseases accompanied by itch is related to the frequency of itching; thus, the ratio of total scratching time to total measurement time (TST [%]) is a useful index for diagnosing skin diseases such as atopic dermatitis. To grasp the trend of the patient's TST [%], daily monitoring of scratching motion is effective, but it is important to carry out the measurements under unconstrained conditions so as not to burden the patient. In this paper, we propose a non-wearing sensing method for measuring scratching motions while the patient is sleeping. The sensing device used in the proposed method is composed of a piezoceramic sensor sandwiched between two metal plates and placed under the legs of the bed. This sensing device is able to measure micro-vibrations produced by the scratching motion. In carrying out the validation experiment, the TST [%] is obtained using the proposed sensing device. The results are then compared with the TST [%] obtained from conventional, more constrained measurement methods, such as electromyography, ceramic sheets, microphones, strain gauges, acceleration sensors, and gyro sensors. Therefore, the sensing device positioned near the subject's head, where the scratching points are closer together, is capable of determining the TST [%] at an accuracy nearly equal to that of the conventional method that shows the highest accuracy TST [%] among all conventional sensors.