相关实验视频

Updated: Jul 4, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

一个低功率阻抗到频率转换器用于频率复合的可穿戴传感器

Weilun Li, Junyi Zhao, Yong Wang

IEEE transactions on biomedical circuits and systems

|February 6, 2024

概括

我们开发了一种用于可穿戴传感器的低功耗阻抗到频率 (I-to-F) 转换器. 该设备为机械传感器提供更高的灵敏度,并通过频率分割多重复合实现同时通信.

科学领域:

* 传感器技术 * 传感器技术
* 电子电路电子电路
* 可穿戴设备

背景情况:

*可穿戴式传感器通常会通过机械变形或压力改变电阻和电容.
* 现有的测量技术对于某些应用可能缺乏足够的灵敏度.
*从多个可穿戴传感器同时进行通信可能具有挑战性.

研究的目的:

*为可穿戴式传感器提出一种新的低功耗阻抗到频率 (I-to-F) 转换器.
*为了提高机械传感器基于阻抗的测量的灵敏度.
* 为了实现频率分割复杂化,从多个传感器同时传输数据.

主要方法:

* 一个固定点电路的设计,其中包括一个电压控制的放松振荡器和一个与温度成比例的 (PTAT) 参考电流.
* I-to-F转换器与海绵式机械传感器的集成.
*分析建模和实验验证I-to-F转换器的性能.
* 展示人类手势识别和辐射脉冲传感应用.

主要成果:

* I-to-F转换器的灵敏度高于使用特定的海绵式传感器进行简单的电阻测量技术.
* 测量阻抗灵敏度为19.66 Hz/Ω,负载阻抗大小为1.1 kΩ.
* 低电流消耗为128μA. 低电流消耗为128μA.
* 通过频率分割复杂化成功演示了同时通信.

结论:

* 拟议的低功耗I-to-F转换器非常适合使用阻抗变量传感器的可穿戴应用.
* 该设备提供了提高的灵敏度,并使高效的多传感器通信.
*在人类手势识别和生命体征监测 (例如,辐射脉冲传感) 中的应用是可行的.

更多相关视频

A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency

A Simple Approach to Perform TEER Measurements Using a Self-Made Volt-Amperemeter with Programmable Output Frequency

Published on: October 5, 2019

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

Published on: June 1, 2012

相关概念视频

Design Example: Capacitance Multiplier Circuit

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

Impedance Combination

Impedance Combination

Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...