短二极管传感器响应线性化通过物理信息的神经网络
Alessandro Fasse1, Romain Meyer2, Esra Neufeld1
1Foundation for Research on Information Technologies in Society (IT'IS), Zurich, Switzerland.
Bioelectromagnetics
|May 22, 2025
概括
这项研究引入了一个基于物理学的神经网络 (PINN),用于快速,准确的短双极二极管传感器的线性化,用于电磁场测量. 这种由人工智能驱动的方法克服了复杂的5G信号所带来的局限性,使得飞行中的参数计算成为可能.
科学领域:
- 电磁场计量学 电磁场计量学
- 传感器技术 传感器技术
- 科学仪器仪表中的人工智能
背景情况:
- 短二极二极管传感器对于测量高频电磁场至关重要,特别是用于近场应用和照射限值遵守.
- 传统的传感器线性化方法耗时且计算成本昂贵,特别是随着各种5G通信信号的出现.
- 现有的方法需要通过测量或模拟进行信号特定校准,因为现代无线技术的复杂性而变得不切实际.
研究的目的:
- 开发一种高效,准确的方法,在广泛的动态范围内对短二极管传感器响应进行线性化.
- 为应对5G和未来通信系统中复杂的调制方案所带来的挑战.
- 为了实现线性化参数的即时计算,降低计算成本和存储需求.
主要方法:
- 开发了一种加速传感器模型模拟技术,提高了准确度.
- 创建了一个全面的探测器参数和信号特征配置数据集.
- 训练了一个基于物理学的神经网络 (PINN),使用易于访问的信号特征来在飞行中确定线性化参数.
主要成果:
- 基于人工智能的方法在峰值特定吸收率 (SAR) 值下达到0.4dB以下的线性化误差.
- 确定线性化参数的速度被加快了大约34,000倍.
- 存储需求减少了大约35万倍,使得现场计算成为可能.
结论:
- 开发的PINN在传感器线性化方面取得了重大进展,用于高频电磁场测量.
- 这种人工智能驱动的方法有效地处理复杂的信号调制,克服传统方法的局限性.
- 这种方法确保了物理模型的准确性,同时大大提高了计算效率和可访问性.
相关概念视频
01:26Linear Approximation in Frequency Domain
81
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
81
01:21Linear Approximation in Time Domain
59
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
59
01:26Classification of Systems-I
167
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
167
01:17Linear Circuits
372
A linear circuit is characterized by its output having a direct proportionality to its input, adhering to the linearity property, which encompasses the principles of homogeneity (scaling) and additivity. Homogeneity dictates that when the input, also referred to as the excitation, is multiplied by a constant factor, the output, known as the response, is correspondingly scaled by the same constant factor. For instance, if the current is multiplied by a constant 'k,' the voltage likewise...
372