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Sensor Principle Structure Classification
Sep 07, 2018

There are two types: active and passive. An active sensor can transform one form of energy directly into another without requiring an external source of energy or motivation. Passive sensors cannot directly convert energy form, but they can control the energy or excitation energy input from another input end, and the sensor takes on the task of converting specific characteristics of an object or process into quantities. Its "objects" can be solid, liquid or gas, and their states can be static or dynamic (that is, process). Object properties can be queried in a variety of ways. The properties of an object can be physical or chemical. In accordance with its working principle, it converts object characteristics or state parameters into measurable electrical quantity, and then separates the electrical signal and sends it to the sensor system for evaluation or marking