Principle of sensor: A sensor is a device that uses certain laws to convert the detected quantity into other physical quantities that are easy to handle. For example, a ruler is a very simple sensor. It marks scales at certain intervals, the scale is a certain law, and then measurements are made according to this law, the length of the object, and the numerical distance for easy application.
For example, a photoresistor is a photoelectric converter, which is made of a specific material so that its resistance changes proportionally within a certain range under the influence of light. To understand a sensor, you must first identify the application of the sensor you want to understand, and then learn more about it. But in the final analysis, the basic principle of the sensor is to use a certain law to convert the measurand into other physical quantities that are easy to handle. There must be a certain law that exists in the sensor itself.
The principle of the #microswitch: the mechanism of the #microswitch is composed of tiny contact intervals and quick movements. In those devices that need to switch circuits frequently, they are automatically controlled and protected. They are usually widely used in electronic equipment, Instrumentation, mining, power system, household appliances, aerospace, missiles, tanks and many other fields, its principle is that the external mechanical force passes through the transmission element, and then the force is applied to the action reed, when the displacement of the action reed When it reaches a critical point, an instantaneous action will be generated, so that the moving contact and fixed contact at the end of the action reed can be quickly connected or disconnected, and the reverse action can be completed instantly.
To sum up, the #microswitch is a switch, not a sensor, commonly known as a mechanical switch. The #microswitch is an external mechanical force that acts on the action reed through transmission elements (press pins, buttons, levers, rollers, etc.) Points and fixed contacts are quickly connected or disconnected. When the acting force on the transmission element is removed, the action reed generates a reverse action force, and when the reverse stroke of the transmission element reaches the action critical point of the reed, the reverse action is completed instantaneously. The contact distance of the micro switch is small, the action stroke is short, the pressing power is small, and the on-off is fast. The action speed of the moving contact has nothing to do with the action speed of the transmission element. Micro switches are used in electronic equipment and other equipment for automatic control and safety protection devices that require frequent switching of circuits.
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