normally closed

简明释义

常闭的

英英释义

例句

1.In HVAC systems, some valves are normally closed 常闭 to prevent air from escaping when not in use.

在暖通空调系统中，一些阀门是常闭 normally closed，以防止在不使用时空气泄漏。

2.When the button is pressed, the normally closed 常闭 switch opens, allowing current to flow.

当按钮被按下时，常闭 normally closed 开关打开，允许电流流动。

3.The fire alarm system includes normally closed 常闭 contacts to ensure that any interruption will trigger an alert.

火灾报警系统包括常闭 normally closed 接点，以确保任何中断都会触发警报。

4.In the circuit design, the relay is configured as normally closed 常闭 to maintain power until it receives a signal.

在电路设计中，继电器配置为常闭 normally closed，以保持电源直到接收到信号。

5.The security system uses a switch that is normally closed 常闭 to ensure the alarm triggers when the door is opened.

安全系统使用一个常闭 normally closed 的开关，以确保门打开时警报会响起。

作文

In the world of electronics and engineering, the concept of a switch is fundamental. Among the various types of switches, one that stands out is the normally closed switch. This type of switch is designed to remain in a closed position when no external force is applied. In simpler terms, a normally closed switch allows current to flow through it until it is intentionally opened. This feature is crucial in many applications, especially in safety systems and automation processes.To better understand the significance of normally closed switches, let’s explore their applications. One common use is in alarm systems. When a door or window equipped with a normally closed switch is closed, the switch completes the circuit, allowing the system to remain inactive. However, if the door or window is opened, the switch opens the circuit, triggering the alarm. This design ensures that the alarm remains silent under normal conditions, only alerting us when there is an intrusion.Another application can be seen in industrial machinery. Many machines are equipped with emergency stop buttons that are normally closed. When the button is not pressed, the circuit is closed, and the machine operates as intended. However, pressing the button opens the circuit, immediately stopping the machine. This safety feature is essential for preventing accidents and ensuring the well-being of operators.The normally closed configuration is also prevalent in heating, ventilation, and air conditioning (HVAC) systems. For instance, in a heating system, a normally closed valve may control the flow of hot water. Under normal circumstances, the valve remains closed, preventing hot water from entering the system. When heating is required, a signal opens the valve, allowing hot water to flow through. This mechanism helps maintain energy efficiency by ensuring that heat is only delivered when needed.Understanding the operation of normally closed switches is vital for anyone involved in electronics or automation. These switches provide a reliable means of controlling circuits and are often preferred for safety-critical applications. The inherent design of being closed by default ensures that systems fail safely, minimizing risks in case of power loss or malfunction.Moreover, the concept of normally closed can extend beyond physical switches. In software engineering, the principle can be metaphorically applied to certain algorithms or processes that remain inactive until triggered by specific conditions. For example, a function might be normally closed in the sense that it does not execute until particular criteria are met, thus conserving resources and optimizing performance.In conclusion, the term normally closed encapsulates a crucial aspect of many systems in both hardware and software. Its applications range from simple household alarms to complex industrial machinery, highlighting its importance in ensuring safety and efficiency. By understanding how normally closed components operate, we can appreciate their role in creating reliable and safe systems that enhance our daily lives.

在电子和工程的世界中，开关的概念是基础中的基础。在各种类型的开关中，有一种特别突出，那就是常闭开关。这种开关设计为在没有施加外部力的情况下保持闭合状态。简单来说，常闭开关允许电流通过，直到被故意打开。这一特性在许多应用中至关重要，尤其是在安全系统和自动化过程中。为了更好地理解常闭开关的重要性，让我们探讨它们的应用。一个常见的用途是在报警系统中。当配备有常闭开关的门或窗关闭时，开关完成电路，允许系统保持不活动。然而，如果门或窗被打开，开关就会打开电路，从而触发报警。这种设计确保在正常条件下报警保持静音，只有在入侵发生时才会发出警报。另一个应用可以在工业机械中看到。许多机器配备有紧急停止按钮，这些按钮是常闭型的。当按钮未被按下时，电路是闭合的，机器按预期运行。然而，按下按钮会打开电路，立即停止机器。这个安全特性对于防止事故和确保操作员的安全至关重要。常闭配置在供暖、通风和空气调节（HVAC）系统中也很常见。例如，在供暖系统中，一个常闭阀门可能控制热水的流动。在正常情况下，阀门保持关闭，防止热水进入系统。当需要加热时，信号打开阀门，允许热水流过。这个机制有助于通过确保只有在需要时才提供热量来维持能源效率。理解常闭开关的操作对于任何参与电子或自动化的人来说都是至关重要的。这些开关提供了一种可靠的电路控制方式，并且在安全关键应用中通常更受欢迎。默认闭合的固有设计确保系统在失去电源或发生故障时安全失败，从而最小化风险。此外，常闭的概念可以扩展到超出物理开关的范围。在软件工程中，该原则可以比喻地应用于某些算法或过程，这些算法或过程在特定条件触发之前保持不活动。例如，一个函数可以被视为常闭，因为它不会执行，直到满足特定标准，从而节省资源并优化性能。总之，术语常闭概括了硬件和软件中许多系统的关键方面。它的应用范围从简单的家庭报警到复杂的工业机械，突显了其在确保安全和效率方面的重要性。通过理解常闭组件的操作，我们可以欣赏它们在创建可靠和安全的系统中所发挥的作用，从而提升我们的日常生活。