noise equivalent power

简明释义

噪声等效功率

英英释义

例句

1.A high noise equivalent power (噪声等效功率) value may indicate that the sensor is not suitable for low-light applications.

高噪声等效功率 (噪声等效功率) 值可能表明该传感器不适合低光照应用。

2.The performance of the imaging system can be evaluated using the noise equivalent power (噪声等效功率) metric.

可以使用噪声等效功率 (噪声等效功率) 指标来评估成像系统的性能。

3.The sensitivity of the detector is often expressed in terms of noise equivalent power (噪声等效功率), which indicates its ability to discern weak signals.

探测器的灵敏度通常用噪声等效功率 (噪声等效功率)来表示，这表明其识别微弱信号的能力。

4.In radio astronomy, a low noise equivalent power (噪声等效功率) is crucial for detecting faint celestial signals.

在射电天文学中，低噪声等效功率 (噪声等效功率) 对于检测微弱的天体信号至关重要。

5.Engineers aim to minimize the noise equivalent power (噪声等效功率) in order to improve signal clarity.

工程师们旨在最小化噪声等效功率 (噪声等效功率) 以提高信号清晰度。

作文

In the field of electronics and telecommunications, understanding the concept of noise equivalent power is crucial for engineers and researchers. Noise equivalent power (NEP) is defined as the amount of noise power that is equivalent to the signal power in a given system, particularly in photodetectors and other sensors. The NEP is a key parameter that helps in assessing the performance of these devices, especially in low-light conditions where the signal can be easily obscured by noise. To grasp the importance of noise equivalent power, one must first understand what noise is in this context. Noise refers to any unwanted or random signals that interfere with the desired signal. In electronic systems, noise can come from various sources, including thermal noise, shot noise, and flicker noise. These noise components can significantly affect the quality of the signal being measured or transmitted. The noise equivalent power is typically expressed in units of watts per square root hertz (W/√Hz) and indicates the minimum detectable signal power level that a detector can measure without being overwhelmed by noise. A lower NEP value signifies a more sensitive detector, meaning it can detect weaker signals amidst higher levels of noise. This sensitivity is particularly important in applications such as astronomy, fiber-optic communications, and medical imaging, where detecting faint signals is essential. For example, in astronomical observations, telescopes equipped with sensitive photodetectors must have a low noise equivalent power to capture the light from distant stars and galaxies. If the NEP is too high, the noise will mask the faint signals from celestial bodies, making it impossible to gather accurate data. Similarly, in fiber-optic communication systems, the NEP of the photodetectors used can determine the maximum distance over which signals can be transmitted without significant loss of information. Moreover, the concept of noise equivalent power is not only limited to photodetectors but is also applicable to other types of sensors. For instance, in radio frequency (RF) systems, the NEP can help evaluate the performance of amplifiers and mixers. Engineers often aim to design systems with a low NEP to enhance the overall system performance and reliability. In conclusion, the noise equivalent power is a fundamental concept in the realm of electronics that plays a pivotal role in determining the effectiveness of various detection systems. Understanding NEP allows engineers to design better devices that can operate efficiently in noisy environments while maintaining high sensitivity. As technology continues to advance, the importance of minimizing noise and optimizing noise equivalent power will remain a vital area of research and development in the pursuit of superior electronic and communication systems.

在电子和电信领域，理解“噪声等效功率”的概念对于工程师和研究人员至关重要。“噪声等效功率”（NEP）被定义为在给定系统中与信号功率相当的噪声功率，特别是在光电探测器和其他传感器中。NEP是评估这些设备性能的关键参数，尤其是在低光条件下，信号很容易被噪声遮蔽。要理解“噪声等效功率”的重要性，首先必须了解在这个上下文中噪声的含义。噪声指的是任何干扰所需信号的杂散或随机信号。在电子系统中，噪声可以来自各种来源，包括热噪声、散粒噪声和闪烁噪声。这些噪声成分会显著影响被测量或传输信号的质量。“噪声等效功率”通常以瓦特每平方根赫兹（W/√Hz）为单位表示，指示探测器可以在不被噪声淹没的情况下测量的最小可检测信号功率水平。较低的NEP值表示探测器更灵敏，意味着它可以在更高的噪声水平中检测到更弱的信号。这种灵敏度在天文学、光纤通信和医学成像等应用中特别重要，因为检测微弱信号至关重要。例如，在天文观测中，配备敏感光电探测器的望远镜必须具有低“噪声等效功率”才能捕捉来自遥远恒星和星系的光。如果NEP过高，噪声将掩盖来自天体的微弱信号，使得无法收集准确的数据。同样，在光纤通信系统中，所用光电探测器的NEP可以决定信号可以在多大距离内传输而不会显著丧失信息。此外，“噪声等效功率”的概念不仅限于光电探测器，还适用于其他类型的传感器。例如，在射频（RF）系统中，NEP可以帮助评估放大器和混频器的性能。工程师通常旨在设计具有低NEP的系统，以提高整体系统性能和可靠性。总之，“噪声等效功率”是电子领域的一个基本概念，在确定各种检测系统的有效性方面发挥着关键作用。理解NEP使工程师能够设计出更好的设备，这些设备可以在嘈杂环境中高效运行，同时保持高灵敏度。随着技术的不断进步，最小化噪声和优化“噪声等效功率”的重要性将继续成为追求卓越电子和通信系统的一个重要研究和发展领域。