vacuum tube voltmeter

简明释义

电子管电压表

英英释义

例句

1.The vacuum tube voltmeter provides accurate readings even in noisy environments.

真空管电压表即使在嘈杂的环境中也能提供准确的读数。

2.For high-frequency measurements, a vacuum tube voltmeter is often preferred over digital meters.

对于高频测量，通常更喜欢使用真空管电压表而不是数字表。

3.When calibrating audio equipment, a vacuum tube voltmeter can be very useful.

在校准音频设备时，真空管电压表非常有用。

4.The vacuum tube voltmeter displays the voltage level on a large analog dial.

真空管电压表在一个大的模拟表盘上显示电压水平。

5.The technician used a vacuum tube voltmeter to measure the voltage in the circuit.

技术人员使用真空管电压表测量电路中的电压。

作文

The development of electronic measuring instruments has significantly advanced the field of electrical engineering. Among these instruments, the vacuum tube voltmeter stands out as a crucial device for measuring voltage levels in various electrical circuits. A vacuum tube voltmeter (真空管电压表) operates based on the principles of thermionic emission and the characteristics of vacuum tubes, which were widely used in the early to mid-20th century before the advent of solid-state devices.The vacuum tube voltmeter is particularly notable for its high input impedance, which allows it to measure voltage without significantly affecting the circuit being tested. This characteristic is essential in precision measurements, where even a small change in load could lead to inaccurate readings. The design of the vacuum tube voltmeter includes a vacuum tube that amplifies the voltage signal, making it easier to read on a calibrated scale.Historically, the vacuum tube voltmeter was one of the first devices to provide an accurate means of measuring voltage in electrical systems. It played a vital role in the development of radio technology, audio equipment, and early computing systems. As engineers and technicians worked with increasingly complex circuits, the need for reliable voltage measurement became paramount. The invention of the vacuum tube voltmeter fulfilled this need by offering a tool that could handle the nuances of varying voltage levels.In terms of construction, a vacuum tube voltmeter typically consists of several key components: the vacuum tube itself, a power supply, and a display mechanism. The vacuum tube, which contains electrodes in a vacuum-sealed glass envelope, is responsible for amplifying the incoming voltage signal. The power supply provides the necessary energy for the operation of the tube, while the display mechanism—often a needle gauge or digital readout—shows the measured voltage.Despite the rise of modern digital multimeters and other solid-state devices, the vacuum tube voltmeter still holds a place in certain niche applications. Audiophiles, for instance, often prefer the warm sound produced by vacuum tube amplifiers, leading to a continued interest in vacuum tube technology. Moreover, some engineers appreciate the unique characteristics of the vacuum tube voltmeter for specific high-frequency measurements where traditional digital meters may not perform optimally.In conclusion, the vacuum tube voltmeter is an essential instrument in the history of electrical measurements. Its ability to accurately measure voltage without influencing the circuit makes it invaluable for engineers and technicians. While technology has evolved, the principles behind the vacuum tube voltmeter remain relevant, reminding us of the foundational developments that paved the way for modern electronics. Understanding the workings and significance of the vacuum tube voltmeter not only enhances our knowledge of electrical engineering but also appreciates the historical context of technological advancements in this field.

电子测量仪器的发展显著推动了电气工程领域的进步。在这些仪器中，真空管电压表作为一种关键设备，在各种电路中测量电压水平。真空管电压表（vacuum tube voltmeter）基于热电子发射原理和真空管特性工作，这种设备在20世纪早中期被广泛使用，在固态设备出现之前。真空管电压表以其高输入阻抗而闻名，这使得它能够在测量电压时不会显著影响被测试电路。这一特性对于精密测量至关重要，因为即使是微小的负载变化也可能导致不准确的读数。真空管电压表的设计包括一个真空管，用于放大电压信号，使其在标定刻度上更容易读取。从历史上看，真空管电压表是提供准确电压测量的一种最早设备之一。它在无线电技术、音频设备和早期计算系统的发展中发挥了重要作用。随着工程师和技术人员处理越来越复杂的电路，对可靠电压测量的需求变得至关重要。真空管电压表的发明满足了这一需求，提供了一种能够处理不同电压水平细微差别的工具。在构造方面，真空管电压表通常由几个关键组件组成：真空管本身、电源和显示机制。真空管包含在真空密封的玻璃外壳中的电极，负责放大输入的电压信号。电源为管子的操作提供必要的能量，而显示机制——通常是指针表或数字读数——显示所测量的电压。尽管现代数字万用表和其他固态设备的崛起，真空管电压表在某些小众应用中仍然占有一席之地。例如，音响爱好者常常偏爱真空管放大器所产生的温暖音色，从而导致对真空管技术的持续兴趣。此外，一些工程师欣赏真空管电压表在特定高频测量中的独特特性，而传统数字仪表可能无法优化执行。总之，真空管电压表是电气测量历史上的一种重要仪器。它能够在不影响电路的情况下准确测量电压，使其对工程师和技术人员而言不可或缺。尽管技术已经发展，但真空管电压表背后的原理依然相关，提醒我们基础性发展的重要性，这些发展为现代电子技术铺平了道路。理解真空管电压表的工作原理和重要性，不仅增强了我们对电气工程的知识，也让我们欣赏到这一领域技术进步的历史背景。