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相关概念视频

Design Example01:23

Design Example

329
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
329
Electro-mechanical Systems01:19

Electro-mechanical Systems

957
Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
957
Instrumentation Amplifier01:25

Instrumentation Amplifier

519
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
519

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Sen Ding1, Dazhe Zhao2, Yongyao Chen3

  • 1Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, China.

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概括
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科学领域:

  • 材料科学与工程 材料科学与工程
  • 人与机器的交互 (HMI)
  • 可穿戴技术可穿戴技术

背景情况:

  • 可穿戴设备正在改变人机交互 (HMI).
  • 现有的HMI系统通常依赖于复杂的传感器阵列,导致有线,信号差异化,功耗和小型化等问题.
  • 在物联网 (IoT) 时代,对具有更高嵌入式信息容量的交互式接口的需求越来越大.

研究的目的:

  • 开发一种新的,单通道的,自动供电的HMI接口.
  • 为了利用磁化微支柱 (MMP) 独特的固有频率作为命令识别机制.
  • 为了克服传统基于传感器阵列的HMI系统的局限性.

主要方法:

  • 一个基于磁化微支柱 (MMP) 自身频率的自动供电HMI接口.
  • 手动振动会在MMP中诱导抑制振荡,通过法拉第的感应定律产生电流信号.
  • 时间到频率的转换MMP振荡分配不同的命令没有干扰,即使在单一的电气通道.
  • 一个圆柱式悬臂模型被用来通过维度和材料属性设计精确调整MMP特异频率.

主要成果:

  • 展示了一个单通道HMI接口,能够从手动振动生成电流信号.
  • 成功地利用MMP固有频率进行命令识别,从而实现无干扰的命令分配.
  • 集成MMP与不同的固有频率到一个单一的设备与两个电极,实现一个高容量的HMI接口.

结论:

  • 一个使用磁化微支柱 (MMP) 的新型,自动供电,单通道HMI接口已经成功开发出来.
  • 自频识别机制为可穿戴设备中的各种命令提供了高容量的解决方案.
  • 这种方法为设计未来的直观,智能和高内存的HMI系统提供了宝贵的参考.