Kelvin bridge ohmmeter

简明释义

开尔文电桥式电阻表

英英释义

例句

1.The technician used a Kelvin bridge ohmmeter to measure the resistance of the wire accurately.

技术人员使用开尔文桥欧姆计准确测量电线的电阻。

2.In our lab, we rely on the Kelvin bridge ohmmeter for precise resistance measurements.

在我们的实验室，我们依靠开尔文桥欧姆计进行精确的电阻测量。

3.The Kelvin bridge ohmmeter is essential for testing low-resistance components.

对于测试低电阻元件，开尔文桥欧姆计是必不可少的。

4.To ensure accuracy, always calibrate the Kelvin bridge ohmmeter before use.

为确保准确性，使用前务必校准开尔文桥欧姆计。

5.We learned how to operate a Kelvin bridge ohmmeter during our electronics course.

在我们的电子课程中，我们学习了如何操作开尔文桥欧姆计。

作文

The world of electrical engineering is filled with various tools and instruments that help in measuring different parameters. One such important instrument is the Kelvin bridge ohmmeter, which plays a crucial role in accurately measuring low resistances. Understanding the function and application of this device can provide valuable insights into its significance in the field of electronics and electrical engineering.To begin with, the Kelvin bridge ohmmeter is based on the principle of the Kelvin bridge method, which was developed by Lord Kelvin in the 19th century. This method is particularly useful for measuring very small resistances, which are often encountered in precision electronic components. The traditional methods of measuring resistance can lead to errors, especially when dealing with low values, due to the resistance of the measuring leads and contacts. The Kelvin bridge ohmmeter addresses this issue by using a four-terminal connection, which eliminates the effects of lead and contact resistance.In a typical setup, the Kelvin bridge ohmmeter consists of two pairs of terminals: the current terminals and the voltage terminals. The current terminals are used to supply a known current through the resistor being measured, while the voltage terminals are used to measure the voltage drop across the resistor. This configuration allows the device to measure the true resistance without the interference from the resistance of the leads.The operation of the Kelvin bridge ohmmeter involves balancing the bridge circuit. By adjusting the known resistances in the bridge, the user can achieve a null condition where the voltage across the voltage terminals is zero. At this point, the value of the unknown resistance can be determined with high accuracy. This method is particularly advantageous in laboratory settings and industrial applications where precision is paramount.Furthermore, the Kelvin bridge ohmmeter is widely used in quality control processes, especially in the manufacturing of electronic components. For instance, when producing resistors, it is essential to ensure that their resistance values are within specified tolerances. Using a Kelvin bridge ohmmeter allows manufacturers to test each component accurately, ensuring reliability and performance in the final product.In addition to its applications in manufacturing, the Kelvin bridge ohmmeter is also utilized in research and development laboratories. Researchers often need to measure the resistivity of materials, and this device provides the necessary precision to conduct such experiments. Whether it's for developing new materials or improving existing ones, the accurate measurements obtained from a Kelvin bridge ohmmeter can significantly impact the outcomes of various studies.Moreover, the advancements in technology have led to the development of digital Kelvin bridge ohmmeters, which offer enhanced features such as data logging, automated measurements, and improved user interfaces. These modern devices not only simplify the measurement process but also increase the efficiency and accuracy of resistance measurements in various applications.In conclusion, the Kelvin bridge ohmmeter is an indispensable tool in the field of electrical engineering. Its ability to accurately measure low resistances makes it essential for quality control in manufacturing, research, and development. As technology continues to evolve, the importance of the Kelvin bridge ohmmeter will only grow, solidifying its place as a fundamental instrument in the toolkit of engineers and researchers alike.

电气工程的世界充满了各种工具和仪器，帮助测量不同的参数。其中一个重要的仪器是Kelvin bridge ohmmeter，它在精确测量低电阻方面发挥着关键作用。理解这个设备的功能和应用可以提供对其在电子和电气工程领域重要性的宝贵见解。首先，Kelvin bridge ohmmeter 基于凯尔文桥法的原理，该方法由凯尔文勋爵在19世纪开发。该方法特别适用于测量非常小的电阻，这在精密电子元件中经常遇到。传统的测量电阻的方法可能会导致误差，尤其是在处理低值时，由于测量引线和接触的电阻。Kelvin bridge ohmmeter 通过使用四端连接来解决这个问题，从而消除了引线和接触电阻的影响。在典型的设置中，Kelvin bridge ohmmeter 由一对电流端子和一对电压端子组成。电流端子用于向被测电阻提供已知电流，而电压端子则用于测量电阻上的电压降。这种配置使得设备能够在不受引线电阻干扰的情况下测量真实电阻。Kelvin bridge ohmmeter 的操作涉及平衡桥路电路。通过调整桥路中的已知电阻，用户可以达到电压端子之间电压为零的平衡条件。在这一点上，可以高精度地确定未知电阻的值。这种方法在实验室环境和工业应用中尤其具有优势，因为精确性至关重要。此外，Kelvin bridge ohmmeter 在质量控制过程中广泛使用，尤其是在电子元件的制造中。例如，在生产电阻器时，确保其电阻值在规定公差范围内至关重要。使用Kelvin bridge ohmmeter 可以准确测试每个组件，确保最终产品的可靠性和性能。除了在制造中的应用之外，Kelvin bridge ohmmeter 还在研究和开发实验室中得到应用。研究人员通常需要测量材料的电阻率，而该设备提供必要的精确度来进行此类实验。无论是开发新材料还是改进现有材料，从Kelvin bridge ohmmeter 获得的准确测量都能显著影响各种研究的结果。此外，技术的进步导致了数字Kelvin bridge ohmmeter 的发展，这些设备提供了增强的功能，如数据记录、自动测量和改进的用户界面。这些现代设备不仅简化了测量过程，还提高了在各种应用中电阻测量的效率和准确性。总之，Kelvin bridge ohmmeter 是电气工程领域不可或缺的工具。它准确测量低电阻的能力使其成为制造中的质量控制、研究和开发的重要工具。随着技术的不断进步，Kelvin bridge ohmmeter 的重要性只会增加，巩固其作为工程师和研究人员工具箱中基本仪器的地位。