Kelvin bridge ohmmeter

简明释义

凯尔文电桥式电阻表

英英释义

例句

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

技术员使用四端口电桥欧姆计准确测量精密电阻的电阻值。

2.To ensure minimal error, the lab employed a Kelvin bridge ohmmeter for low-resistance measurements.

为了确保误差最小，实验室采用了四端口电桥欧姆计进行低电阻测量。

3.For calibration purposes, the engineer utilized a Kelvin bridge ohmmeter to verify the standards.

为了校准，工程师使用四端口电桥欧姆计验证标准值。

4.The Kelvin bridge ohmmeter allows for precise measurement by eliminating lead resistance.

四端口电桥欧姆计通过消除引线电阻来实现精确测量。

5.In research, a Kelvin bridge ohmmeter is essential for testing materials with very low resistivity.

在研究中，四端口电桥欧姆计对于测试具有极低电阻率的材料至关重要。

作文

The measurement of electrical resistance is crucial in various fields of science and engineering. One of the most accurate methods for measuring low resistances is through the use of a device known as the Kelvin bridge ohmmeter. This instrument is designed to minimize the errors that can arise from the resistance of the measuring leads, which can significantly affect the accuracy of resistance measurements, especially when dealing with very low resistances. The Kelvin bridge ohmmeter operates on the principle of a four-terminal measurement system. This method involves using two pairs of leads: one pair carries the current to the resistor being measured, while the other pair measures the voltage drop across the resistor. By separating the current-carrying leads from the voltage-sensing leads, the Kelvin bridge ohmmeter effectively eliminates the influence of lead resistance on the measurement, resulting in highly accurate readings. In practical applications, the Kelvin bridge ohmmeter is often used in laboratories and industrial settings where precision is paramount. For instance, it is widely employed in the calibration of standard resistors, testing of electronic components, and quality control processes in manufacturing. The ability to measure small resistances with high accuracy makes this device indispensable in research and development, particularly in fields such as materials science and semiconductor technology. The design of the Kelvin bridge ohmmeter includes a bridge circuit, which allows for the comparison of the unknown resistance with known standards. This comparison is made possible through a null detection method, where the goal is to adjust the circuit until there is no voltage difference between the two sides of the bridge. When the bridge is balanced, the unknown resistance can be calculated based on the known values in the circuit. This method not only enhances accuracy but also simplifies the measurement process, making it accessible even for those who may not have extensive training in electrical engineering. Moreover, the Kelvin bridge ohmmeter has evolved over the years, with advancements in technology leading to the development of digital versions of the device. These modern instruments often come equipped with features such as data logging, automatic temperature compensation, and user-friendly interfaces, making them even more versatile and easier to use. As technology continues to advance, the applications of the Kelvin bridge ohmmeter are likely to expand further, paving the way for innovations in electrical measurement techniques.In conclusion, the Kelvin bridge ohmmeter is a vital tool for accurately measuring low resistances, providing significant advantages over traditional methods. Its unique four-terminal design and bridge circuit configuration allow for precise measurements by eliminating the impact of lead resistance. As industries continue to demand higher accuracy in electrical measurements, the importance of the Kelvin bridge ohmmeter will undoubtedly grow, solidifying its role as an essential instrument in both research and practical applications.

电阻的测量在科学和工程的各个领域都至关重要。测量低电阻的最准确方法之一是使用一种称为Kelvin bridge ohmmeter的设备。这种仪器旨在最小化测量导线电阻可能引起的误差，这会显著影响电阻测量的准确性，尤其是在处理非常低的电阻时。Kelvin bridge ohmmeter的工作原理是四端测量系统。这种方法涉及使用两对导线：一对将电流传递到被测电阻，而另一对则测量电阻上的电压降。通过将电流导线与电压感应导线分开，Kelvin bridge ohmmeter有效消除了导线电阻对测量的影响，从而得出高度准确的读数。在实际应用中，Kelvin bridge ohmmeter通常用于实验室和工业环境中，在这些地方精度至关重要。例如，它广泛应用于标准电阻的校准、电子元件的测试以及制造过程中的质量控制。能够以高精度测量小电阻使该设备在研究和开发中不可或缺，特别是在材料科学和半导体技术等领域。Kelvin bridge ohmmeter的设计包括一个桥接电路，这使得未知电阻与已知标准进行比较成为可能。通过零检测方法实现这种比较，目标是调整电路，直到桥的两侧之间没有电压差。当桥达到平衡时，可以根据电路中的已知值计算未知电阻。这种方法不仅提高了准确性，还简化了测量过程，使其即使对那些没有广泛电气工程培训的人也变得可及。此外，随着技术的进步，Kelvin bridge ohmmeter多年来不断发展，数字版本的设备相继问世。这些现代仪器通常配备数据记录、自动温度补偿和用户友好的界面等功能，使其更加多功能和易于使用。随着技术的不断进步，Kelvin bridge ohmmeter的应用范围可能会进一步扩大，为电气测量技术的创新铺平道路。总之，Kelvin bridge ohmmeter是准确测量低电阻的重要工具，提供了比传统方法更显著的优势。其独特的四端设计和桥接电路配置通过消除导线电阻的影响，实现了精确的测量。随着各行业对电气测量精度的不断需求，Kelvin bridge ohmmeter的重要性无疑会增加，巩固其作为研究和实际应用中必不可少的仪器的角色。