对于气动肌肉执行器中的容量长度传感器的电流模式模拟前端
Guido Di Patrizio Stanchieri1, Andrea De Marcellis1, Marco Faccio1
1Electronic and Photonic Integrated Circuits and Systems Laboratory (EPICS Lab), Department of Information Engineering, Computer Science and Mathematics (DISIM), University of L'Aquila, Via Vetoio, Coppito, 67100 L'Aquila, Italy.
Micromachines
|March 28, 2024
概括
本研究介绍了一种新的电流模式模拟前端电路,用于精确的电容电压转换. 该电路具有高灵敏度和分辨率,可在工业和医疗应用中进行准确的测量.
科学领域:
- 电子工程 电子工程
- 生物医学仪器仪器仪表
- 传感器技术 传感器技术
背景情况:
- 容量传感器对于各种应用至关重要,需要高效的信号调节.
- 现有的电容电压转换电路在灵敏度,分辨率或可调性方面经常面临限制.
- 模拟前端电路对于将传感器与测量系统接口至关重要.
研究的目的:
- 设计,实施和描述电流模式模拟前端电路,用于电容到电压的转换.
- 为了实现高灵敏度和分辨率,用于准确的电容量测量.
- 为了证明电路在工业和康复医学中的实用性,特别是在气动肌肉方面.
主要方法:
- 该电路使用振荡器,被动低通波器和直流-直流放大器.
- 在设计中使用了采用第二代电流输送电路的电流模式方法.
- 商业离散组件被用于电路实现.
主要成果:
- 该电路实现了167.34mV/pF的灵敏度,电容分辨率为5fF,增益为1000.
- 演示了可调节增益,偏移补偿和调节能力.
- 当应用于麦基本气动肌肉时,该系统达到70mV/mm的灵敏度,肌肉长度变化误差为0.008mm.
结论:
- 开发的电流模式模拟前端电路为电容量测量提供了强大的和可调的解决方案.
- 它的高性能和多功能性使其适用于各种传感器应用,包括生物医学监测.
- 对气动肌肉长度测量的成功应用凸显了其在康复医学和机器人的潜力.
相关概念视频
Back EMF
Generators convert mechanical energy into electrical energy, whereas motors convert electrical energy into mechanical energy. A motor works by sending a current through a loop of wire located in a magnetic field. As a result, the magnetic field exerts a torque on the loop. This rotates a shaft, extracting mechanical work from the electrical current sent in initially. When the coil of a motor is turned, magnetic flux changes through the coil, and an emf (consistent with Faraday's law) is induced.
Potentiometer
Voltage and current measurements using a standard voltmeter and ammeter alter the circuit being measured either by drawing or resisting the current flow, which introduces uncertainties in the measurements. Null measurements balance the voltages so that no current flows through the measuring device and, therefore, no alterations occur in the measured circuit.
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
Suppose the emf of a battery needs to be measured. If the battery is directly connected to a standard voltmeter, the measured quantity is...
Instrumentation Amplifier
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...
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
Bode Plots Construction
The Bode plot is an essential tool in control system analysis, mapping the frequency response of a system through a magnitude plot and a phase plot, both against a logarithmic frequency axis. To construct a Bode plot, consider the transfer function H(ω):
Design Example: Frog Muscle Response
A student is tasked to work on an intriguing experiment involving an RL (Resistor-Inductor) circuit to study the muscle response of a frog's leg to electrical stimulation. The RL circuit plays a crucial role in this experiment, providing the means to control and measure the electrical impulses that trigger muscle contraction.
When the switch connecting the RL circuit is closed, a brief muscle contraction is observed. This is because, at a steady state, the inductor acts like a short circuit,...
When the switch connecting the RL circuit is closed, a brief muscle contraction is observed. This is because, at a steady state, the inductor acts like a short circuit,...
Electro-mechanical Systems
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...
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...


