What is a sensor and its role?
1. The sensor is a detection device that can feel the measured information and transform the sensed information into a Telecom number or other desired form according to a certain law information output to meet the requirements of information transmission, processing, storage, display, recording and control. Sensor technology is widely used in industrial automation energy, transportation, disaster prediction, security defense, environmental protection, medical care and daily life.
When the sensor is classified according to the measurement, it can be divided into pressure, temperature, speed, acceleration, displacement, humidity and other non-electric quantity, and the corresponding can be divided into temperature sensor, pressure sensors, etc. According to the working principle of the sensor, it can be divided into resistive sensor, capacitive sensor, inductive sensor, piezoelectric sensor, Hall sensor, photoelectric sensor, Ultrasonic sensor, etc. According to the nature of the sensor output signal, it can be divided into switch sensor, analog sensor, digital sensor and so on.
3.The sensor measuring circuit
In the sensor technology, the signal output from the sensor is processed by the measuring circuit, so as to facilitate the display, recording and control. Usually the sensor measuring circuit has analog circuit and switch type measuring circuit. The measured information is converted to a non-electric quantity through a sensitive element, and the output is output by an output circuit to obtain various data.
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