Kelvin double bridge

简明释义

双臂电桥

英英释义

例句

1.The technician used the Kelvin double bridge to measure the resistance of a low-resistance wire accurately.

技术员使用开尔文双桥精确测量低电阻电线的电阻。

2.The Kelvin double bridge is essential for minimizing errors in resistance measurement due to lead and contact resistances.

为了最小化因导线和接触电阻造成的测量误差，开尔文双桥是必不可少的。

3.In the laboratory, we learned how to set up the Kelvin double bridge for precise resistance measurements.

在实验室，我们学习了如何搭建开尔文双桥以进行精确的电阻测量。

4.For our project, we decided to incorporate a Kelvin double bridge for better measurement results.

在我们的项目中，我们决定引入开尔文双桥以获得更好的测量结果。

5.Using the Kelvin double bridge, we were able to determine the resistivity of the material with high accuracy.

使用开尔文双桥，我们能够高精度地确定材料的电阻率。

作文

The field of electrical engineering has seen numerous advancements over the years, particularly in the measurement of resistance. One significant instrument that has emerged in this domain is the Kelvin double bridge. This device is crucial for measuring very low resistances with high accuracy, which is essential in many applications, from industrial processes to scientific research. The Kelvin double bridge was developed by Lord Kelvin in the 19th century, and its design addresses some of the limitations found in earlier resistance measurement methods.The principle behind the Kelvin double bridge is based on the null method of measurement. In this setup, a known voltage is applied across a circuit that includes the unknown resistance. By adjusting the bridge, the operator can find a point where the current through the galvanometer is zero. At this point, the measurements can be taken without the influence of lead and contact resistances, which often skew results in low-resistance measurements.One of the key advantages of using the Kelvin double bridge is its ability to eliminate errors caused by the resistance of the connecting leads. In traditional measurement methods, the resistance of the leads can significantly affect the accuracy of the results, especially when dealing with low values of resistance. The Kelvin double bridge mitigates this issue by using a four-terminal configuration. This means that two terminals are used to supply the current, while the other two are used to measure the voltage drop across the resistor. This separation ensures that the lead resistance does not impact the measurement, allowing for precise readings.Applications of the Kelvin double bridge extend across various fields. In electronics, it is commonly used to measure the resistance of components such as resistors, inductors, and capacitors. In laboratories, researchers utilize the Kelvin double bridge for experiments requiring accurate resistance measurements, such as those involving superconductors or materials at cryogenic temperatures. Additionally, industries that require high-precision measurements for quality control and product testing rely on this instrument to ensure their products meet stringent specifications.Despite its advantages, operating the Kelvin double bridge requires a certain level of expertise. Users must be familiar with the principles of electrical circuits and the specific calibration procedures necessary to obtain accurate readings. Furthermore, environmental factors such as temperature can also affect resistance measurements, necessitating careful control of experimental conditions.In conclusion, the Kelvin double bridge represents a pivotal development in the field of electrical measurement. Its design allows for accurate determination of low resistances, making it an invaluable tool in both industrial and research settings. As technology continues to evolve, the principles behind the Kelvin double bridge will likely remain relevant, serving as a foundation for future innovations in resistance measurement techniques. Understanding this instrument not only enhances our grasp of electrical engineering concepts but also highlights the importance of precision in scientific inquiry and industrial applications.

电气工程领域多年来经历了许多进步，特别是在电阻测量方面。一个在这一领域中出现的重要仪器是开尔文双臂电桥。该设备对于以高精度测量非常低的电阻至关重要，这在许多应用中都是必不可少的，从工业过程到科学研究。开尔文双臂电桥是由开尔文勋爵在19世纪开发的，其设计解决了早期电阻测量方法中的一些局限性。开尔文双臂电桥背后的原理基于零法测量。在这个设置中，已知电压施加在包括未知电阻的电路上。通过调整电桥，操作员可以找到一个电流通过电流计为零的点。在这个点上，可以在不受引线和接触电阻影响的情况下进行测量，这通常会在低电阻测量中扭曲结果。使用开尔文双臂电桥的一个主要优点是它能够消除由于连接引线的电阻造成的误差。在传统的测量方法中，引线的电阻会显著影响结果的准确性，尤其是在处理低电阻值时。开尔文双臂电桥通过使用四端配置来缓解这个问题。这意味着两个端子用于提供电流，而另外两个端子用于测量电阻上的电压降。这种分离确保引线电阻不会影响测量，从而允许精确读数。开尔文双臂电桥的应用扩展到各个领域。在电子学中，它通常用于测量电阻器、电感器和电容器等组件的电阻。在实验室中，研究人员利用开尔文双臂电桥进行需要准确电阻测量的实验，例如涉及超导体或低温材料的实验。此外，需要高精度测量以进行质量控制和产品测试的行业依赖于该仪器，以确保其产品符合严格的规格。尽管有其优点，但操作开尔文双臂电桥需要一定程度的专业知识。用户必须熟悉电路原理以及获得准确读数所需的特定校准程序。此外，温度等环境因素也会影响电阻测量，因此需要仔细控制实验条件。总之，开尔文双臂电桥代表了电气测量领域的一个重要发展。它的设计允许准确确定低电阻，使其成为工业和研究环境中不可或缺的工具。随着技术的不断发展，开尔文双臂电桥背后的原理可能仍将保持相关性，作为未来电阻测量技术创新的基础。理解这一仪器不仅增强了我们对电气工程概念的掌握，还突显了精确性在科学探究和工业应用中的重要性。