Power Wheelchair Footplate Pressure and Positioning Sensor.
Power Wheelchair Footplate Pressure and Positioning Sensor.
复制标题
电动轮椅踏板压力和定位传感器。
DOI：
10.1109/embc.2018.8513373
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Henzel,MKristi
中科院分区：
文献类型：
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作者：
Majerus,SteveJA;Lerchbacker,Joseph;Barbaro,Daniel;Mitchell,StevenJ;Bogie,KathM;Henzel,MKristi
电动轮椅使用者有因脚在踏板上的错误位置而造成严重伤害的风险。这可能会导致碰撞或脚拖这是严重的或危及生命的伤害的人与脊髓损伤。由于倾斜压力释放伤害，脚不能安全地固定，因此，脚很容易在用户没有意识到的情况下陷入脆弱的位置。为了减少受伤的可能性，我们开发了一种传感器，用于在轮椅驱动时真实的时间监测脚的位置。该传感器使用一组力感应电阻器和红外距离传感器来检测压力和踏板范围内的脚的位置。传感器阵列每英尺有23个力传感器和14个红外传感器，制造在标准印刷电路板上，并封装在耐用的热塑性聚氨酯中，以抵抗环境。制造的传感器使用蓝牙低功耗无线电以10 Hz的频率传输足部压力和位置数据。开发了一个iOS应用程序，以通知用户易受伤害的脚部位置。测量结果证实了系统在典型足部压力下的功能，并表明该设备已准备好用于脊髓损伤电动轮椅使用者的下一阶段临床试验。
Power wheelchair users are at risk for severe injuries caused by foot mis-position on the footplate. This can lead to collisions or foot dragging which are severe or lifethreatening injuries for people with spinal cord injuries. The foot cannot be safely immobilized due to tilting pressure relief injuries, therefore, the foot can easily fall into a vulnerable position without the user realizing it. To reduce the likelihood of injury, we have developed a sensor for monitoring foot position in real time, as the wheelchair is driven. The sensor uses an array of force-sensing resistors and infrared distance sensors to detect the pressure and location of the foot within the immediate confines of the footplate. Sensor arrays with 23 force sensors and 14 infrared sensors per foot were fabricated on standard printed circuit boards and encapsulated in a durable thermoplastic urethane for environmental resistance. Fabricated sensors transmitted foot pressures and position data at 10 Hz using a Bluetooth Low Energy radio. An iOS app was developed to notify users of vulnerable foot position. Measured results confirmed the functionality of the system over typical foot pressures, and indicated that the device is ready for next-stage clinical trials with spinal cord injured power wheelchair users.