Question:
What is a sensor? What is it made of? What is a sensitive element? What is a conversion element? What are the common characteristics of sensors?
Answer
:
A sensor (Transducer/Sensor) is a device that can sense a specified measurement and convert it into a usable output signal according to certain rules, usually composed of sensitive elements and conversion elements.
Among them, the sensitive element refers to the part of the sensor that can directly sense or respond to the measured quantity.
The conversion element refers to the part of the sensor that can convert the sensed or responsive measurement from the sensitive element into an electrical signal suitable for transmission and processing.
The common characteristic of sensors is the use of physical laws or the physical, chemical, or biological characteristics of materials to convert non-electrical quantities (such as displacement, speed, acceleration, force, etc.) into electrical quantities (voltage, current, charge) or electrical parameters (resistance, capacitance, inductance, frequency, etc.) for output.
According to the definition of sensors, the basic composition of a sensor is divided into sensitive elements and conversion elements, which respectively complete the two basic functions of detection and conversion.
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