What does the sensor consist of?

Sensors generally consist of three parts: sensitive components, conversion components, and signal conditioning conversion circuits. Sometimes an additional auxiliary power supply is required to provide conversion energy. The sensitive element refers to the part of the sensor that can directly sense or respond to the measured value; the conversion element refers to the part of the sensor that can convert the measured value that the sensitive element senses or responds into into an electrical signal suitable for transmission or measurement.

Sensors generally consist of three parts: sensitive components, conversion components, and signal conditioning conversion circuits:

1. Sensitive Sensitive element: An element that directly senses the measured value and outputs a certain physical quantity that has a definite relationship with the measured value.

2. Transduction element: takes the output of the sensitive element as input and converts the input into circuit parameters.

3. Transduction circuit: The above circuit parameters can be converted into power output when connected to the conversion circuit.

In fact, some sensors are very simple, consisting of only a sensitive element (also used as a conversion element), which directly outputs electricity when it senses what is being measured. Such as thermocouple. Some sensors are composed of sensitive elements and conversion elements without conversion circuits. Some sensors have more than one conversion element and need to undergo several conversions.

Since the sensor output signal is generally very weak, the sensor output signal generally requires signal conditioning and conversion, amplification, calculation and modulation before it can be displayed and controlled.

With the application of semiconductor devices and integration technology in sensors, sensor modules and integrated circuit sensors that integrate the sensor's signal conditioning conversion circuit and sensitive components on the same chip have been realized, such as integrated temperature sensors. AD590, DS18B20, etc.

For more related knowledge, please visit: PHP Chinese website!

The above is the detailed content of What does the sensor consist of?. For more information, please follow other related articles on the PHP Chinese website!