Wheatstone bridge

简明释义

惠斯登电桥

英英释义

例句

1.In the laboratory, we learned how to balance the Wheatstone bridge to find the precise value of the resistor.

在实验室里，我们学习了如何平衡惠斯登电桥以找到电阻的精确值。

2.The technician used a Wheatstone bridge to measure the resistance of the unknown resistor in the circuit.

技术员使用惠斯登电桥来测量电路中未知电阻的电阻值。

3.By adjusting the variable resistor in the Wheatstone bridge, we can achieve a null reading.

通过调节惠斯登电桥中的可变电阻，我们可以达到零读数。

4.The Wheatstone bridge is commonly used in strain gauge applications to measure small deformations.

在应变计应用中，惠斯登电桥通常用于测量微小的变形。

5.Engineers often use a Wheatstone bridge for calibrating measuring instruments.

工程师们常常使用惠斯登电桥来校准测量仪器。

作文

The Wheatstone bridge is a fundamental electrical circuit used to measure unknown resistances. Invented by Samuel Hunter Christie in 1833 and later popularized by Samuel Wheatstone, this bridge is crucial in various applications, especially in laboratories and industrial settings. The basic principle of the Wheatstone bridge involves balancing two legs of a circuit, allowing for precise measurements of resistance. This concept can be applied to many fields, including physics, engineering, and even medical diagnostics.To understand how the Wheatstone bridge works, it is essential to know its components. The circuit typically consists of four resistors arranged in a diamond shape. Two of these resistors are known values, while the other two include one known resistor and one unknown resistor. A galvanometer, which is a device that detects small currents, is connected between the two junctions of the resistors. When the bridge is balanced, the current through the galvanometer is zero, indicating that the ratio of the known resistors is equal to the ratio of the unknown resistors. From this balance condition, one can derive the value of the unknown resistor using the formula: R1/R2 = R3/Rx, where R1 and R2 are the known resistors, R3 is the known resistor in the other leg, and Rx is the unknown resistor.The practical applications of the Wheatstone bridge are numerous. In laboratories, it is often used for calibrating measuring instruments and for testing the properties of materials. For instance, engineers might use it to measure the resistivity of different materials, which is crucial in designing electrical components. Furthermore, the Wheatstone bridge is also applicable in strain gauge technology, where it helps measure deformation in materials. By placing strain gauges in the bridge configuration, engineers can detect minute changes in resistance caused by stress or strain on an object.Another significant application of the Wheatstone bridge is in temperature measurement. Thermistors and resistance temperature detectors (RTDs) can be incorporated into the bridge circuit to create highly accurate temperature sensors. As the temperature changes, the resistance of these components varies, leading to measurable changes in the output of the bridge. This method is widely used in industries where precise temperature control is crucial, such as in chemical processing and food production.In summary, the Wheatstone bridge is an essential tool in both theoretical and practical aspects of electrical engineering. Its ability to provide accurate measurements of resistance makes it invaluable in various applications, from laboratory experiments to industrial processes. Understanding the workings of the Wheatstone bridge not only enhances one's knowledge of electrical circuits but also opens doors to advanced concepts in electronics and instrumentation. As technology continues to evolve, the principles behind the Wheatstone bridge remain relevant, proving its enduring significance in the field of engineering and beyond.

电桥是用于测量未知电阻的基本电路。它由塞缪尔·亨特·克里斯蒂于1833年发明，后来由塞缪尔·惠斯通推广，这种电桥在各种应用中至关重要，尤其是在实验室和工业环境中。电桥的基本原理涉及平衡电路的两个支路，从而允许精确测量电阻。这个概念可以应用于许多领域，包括物理学、工程学，甚至医学诊断。要理解电桥的工作原理，必须了解其组成部分。该电路通常由四个电阻器以菱形形状排列。这四个电阻器中有两个是已知值，另两个包括一个已知电阻和一个未知电阻。一个检测小电流的仪器——电流计，连接在电阻器的两个连接点之间。当电桥平衡时，电流计中的电流为零，表明已知电阻的比率等于未知电阻的比率。从这个平衡条件，可以使用公式：R1/R2 = R3/Rx，推导出未知电阻的值，其中R1和R2是已知电阻，R3是另一条支路的已知电阻，Rx是未知电阻。电桥的实际应用非常广泛。在实验室中，它通常用于校准测量仪器和测试材料的性质。例如，工程师可能会使用它来测量不同材料的电阻率，这在设计电气组件时至关重要。此外，电桥还应用于应变计技术，通过将应变计放置在电桥配置中，工程师可以检测由于物体上的应力或变形引起的微小电阻变化。电桥的另一个重要应用是在温度测量中。热敏电阻和电阻温度探测器（RTD）可以集成到电桥电路中，以创建高度精确的温度传感器。随着温度的变化，这些组件的电阻会变化，从而导致电桥输出的可测量变化。这种方法在需要精确温度控制的行业中广泛应用，例如化工处理和食品生产。总之，电桥是电气工程理论和实践方面的重要工具。它提供准确的电阻测量能力，使其在从实验室实验到工业过程的各种应用中都具有不可或缺的价值。理解电桥的工作原理不仅增强了对电路的知识，还为电子学和仪器仪表的高级概念打开了大门。随着技术的不断发展，电桥背后的原理仍然相关，证明了其在工程及其他领域的持久重要性。