voltmeter

简明释义

英[ˈvəʊltmiːtə(r)]美[ˈvoʊltmiːtər]

n. 伏特计，电压表

英英释义

单词用法

同义词

反义词

例句

1.The voltmeter is an electrical instrument for measurement of voltage.

伏特计是用来测量电压的仪表。

2.The circuit of the electrometer when used as a voltmeter is actually as shown in Figure 2-6.

当静电计作为电压表使用时，其电路实际上如图2 - 6所示。

3.Using a voltmeter measure fused ign sw output ckt at the red conn.

用伏特表测量红色接头处的熔断点火装置开关输出电路。

4.A steady-state DC signal applied to a voltmeter presents no conceptual difficulty.

理解稳态直流信号加到电压表上的情况在概念上没有什么困难。

5.An electronic voltmeter that gives readings in digits.

能够以数字显示的电伏特计。

6.The holiday detector shall be checked with a DC voltmeter at least once each shift to ensure accuracy.

应至少在每次换班时用直流电伏特计检查一次漏涂检测仪以确保其准确度。

7.Therefore, a voltmeter with high input resistance, such as an electrometer, is required.

所以需要使用具有高输入电阻的电压表，例如静电计。

8.The three-pole switch was originally used to switch a voltmeter guard along with the signal lines.

三刀开关最早用于切换伏特计保护及信号线路。

9.A voltmeter shall indicate the state of charge with a red pilot light to indicate when the high rate charger is in operation.

电压表应指示充电状态，红色信号灯指示高速充电器运行。

10.Before starting the experiment, make sure to calibrate the voltmeter 电压表 properly.

在开始实验之前，确保正确校准电压表。

11.The technician used a voltmeter 电压表 to measure the voltage across the circuit.

技术员使用电压表测量电路中的电压。

12.If the voltmeter 电压表 reads zero, there may be a break in the circuit.

如果电压表显示为零，可能电路中有断路。

13.He connected the voltmeter 电压表 in parallel to get an accurate reading.

他将电压表并联连接以获得准确的读数。

14.The digital voltmeter 电压表 provides a more precise measurement than the analog version.

数字电压表提供比模拟版本更精确的测量。

作文

A voltmeter is an essential instrument used in electrical engineering and various applications to measure the voltage across two points in an electrical circuit. Understanding how a voltmeter works and its significance can greatly enhance one’s knowledge of electricity and electronics. In this essay, I will explore the function, types, and importance of the voltmeter in both theoretical and practical contexts. The primary function of a voltmeter is to measure the electric potential difference between two points. This measurement is crucial for diagnosing electrical circuits, ensuring that devices operate within their specified voltage ranges. Without accurate measurements provided by a voltmeter, engineers and technicians would struggle to identify issues such as short circuits or overloads that could lead to equipment failure. There are two main types of voltmeters: analog and digital. Analog voltmeters use a needle and dial to display voltage readings, while digital voltmeters provide a numerical readout on an LCD or LED screen. Both types have their advantages and disadvantages. For example, analog voltmeters can be more sensitive to small changes in voltage, making them useful for certain applications. On the other hand, digital voltmeters are generally easier to read and can offer additional features, such as data logging and automatic range selection. In practical applications, the use of a voltmeter extends beyond simple voltage measurements. For instance, in a laboratory setting, students learning about circuits often use voltmeters to understand Ohm's Law, which states that voltage equals current times resistance (V = IR). By measuring voltage and current, students can calculate resistance and gain a deeper understanding of how electrical components interact. Moreover, in the field of renewable energy, voltmeters play a vital role in monitoring the performance of solar panels and wind turbines. Engineers rely on these instruments to ensure that the systems are generating the expected voltage and to troubleshoot any issues that may arise. This is particularly important as the world shifts towards sustainable energy solutions, where efficiency and reliability are paramount. In addition to their technical applications, voltmeters also serve educational purposes. They are commonly used in science classrooms to teach students about electricity and circuits. By allowing students to visualize voltage levels, voltmeters help demystify the concept of electric potential and encourage hands-on learning. This experiential approach fosters a greater appreciation for the subject and can inspire future generations of engineers and scientists. In conclusion, the voltmeter is a fundamental tool in the realm of electrical measurement. Its ability to accurately gauge voltage is indispensable in various fields, from engineering to education. As technology continues to advance, the design and functionality of voltmeters will likely evolve, but their core purpose will remain unchanged: to provide critical information about electrical circuits. Therefore, understanding how to use a voltmeter effectively is an invaluable skill for anyone working with electricity, whether as a professional or a student. Through this knowledge, we can ensure the safe and efficient use of electrical systems in our daily lives.

电压表是电气工程和各种应用中使用的重要仪器，用于测量电路中两个点之间的电压。理解电压表的工作原理及其重要性可以大大增强人们对电力和电子学的知识。在这篇文章中，我将探讨电压表的功能、类型以及在理论和实践中的重要性。 电压表的主要功能是测量两个点之间的电位差。这种测量对于诊断电路至关重要，确保设备在其指定电压范围内运行。如果没有电压表提供的准确测量，工程师和技术人员将很难识别短路或过载等问题，这可能导致设备故障。 电压表主要有两种类型：模拟电压表和数字电压表。模拟电压表使用指针和刻度盘显示电压读数，而数字电压表则在LCD或LED屏幕上提供数字读数。这两种类型各有优缺点。例如，模拟电压表对电压的小变化更为敏感，因此在某些应用中非常有用。另一方面，数字电压表通常更易于读取，并且可以提供额外的功能，如数据记录和自动范围选择。 在实际应用中，电压表的使用超出了简单的电压测量。例如，在实验室环境中，学习电路的学生常常使用电压表来理解欧姆定律，该定律指出电压等于电流乘以电阻（V = IR）。通过测量电压和电流，学生可以计算电阻，并更深入地了解电气元件如何相互作用。 此外，在可再生能源领域，电压表在监测太阳能电池板和风力涡轮机的性能方面发挥着至关重要的作用。工程师依赖这些仪器来确保系统产生预期的电压，并排除可能出现的任何问题。随着世界向可持续能源解决方案的转变，这一点尤为重要，因为效率和可靠性至关重要。 除了技术应用外，电压表还有教育用途。它们通常在科学课堂上用于教授学生电力和电路。通过让学生可视化电压水平，电压表帮助揭开电位的概念，鼓励动手学习。这种体验式的方法培养了对该学科的更大欣赏，并可以激励未来几代工程师和科学家。 总之，电压表是电气测量领域的基本工具。其准确测量电压的能力在各个领域都是不可或缺的，从工程到教育。随着技术的不断进步，电压表的设计和功能可能会发展，但其核心目的将保持不变：提供有关电气电路的关键信息。因此，有效使用电压表的知识对于任何与电力打交道的人来说都是一项宝贵的技能，无论是作为专业人士还是学生。通过这种知识，我们可以确保在日常生活中安全有效地使用电气系统。