Sensors are widely used in our lives. It uses a new type of high-tech technology. There are many types of sensors, which occupy many fields in our lives and bring us great convenience. So, what are the types of sensors? What are the functions of the sensors? Let's take a look together with the editor.
What types of sensors
1. What are the types of sensors-optical sensors
The photo sensor uses the photovoltaic effect. This effect is detected by adding the voltage and current generated at the semiconductor PN junction as the output through the irradiation of light.
2. What types of sensors-temperature sensors
The temperature sensor is usually used to detect the physical effect of temperature. It uses the change of the resistance of the organic semiconductor with the temperature as the temperature sensor. In addition, changes in the dielectric constant and piezoelectric constant are also used to detect changes in its resonance frequency.
3. What types of sensors-pressure sensors
Pressure sensors generally use some kind of piezoresistive effect, that is, when pressure is applied to the resistor, its resistance value can change. This change is mainly because the electron mobility after pressure changes.
4. What are the types of sensors-magnetic sensors
The magnetic sensor is a device that uses the Hall effect, and connects current between the ends of a semiconductor sheet. If a magnetic field is applied outside the vertical direction of the sheet, the carriers will move in the direction under the effect of Lorentz force.
5. What are the types of sensors-gas sensors
The gas sensor actually mainly uses the gas adsorption effect. When gas molecules are adsorbed on its surface, electron exchange occurs between the gas molecules and the sintered body. Generally, the resistance value in reducing gas will decrease, while the resistance value in oxidizing gas will increase.
The role of the sensor
The sensor is a kind of function block. Its function is to convert various signals from the outside into electrical signals. If you want to detect and control a variety of signals, then you must have simple and easy-to-process signals in order to meet the electrical signal.
Article Summary: The above is about the types of sensors and the role of sensors, I hope to help you. The sensor belongs to a detection device, which can convert the sensed information into electrical signals or output information in other required forms. For more related knowledge, please continue to pay attention to this website.
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