Sensor classification method - Database & Sql Blog Articles

Photocoupler

The sensor is a detecting device that can sense the measured information and can transform the detected information into an electrical signal or other required form of information output according to a certain law to meet the information transmission, processing, storage, Requirements for display, recording and control. It is the first step in achieving automatic detection and automatic control. There are many ways to classify sensors, which are distinguished according to different principles:

 1 
 According to the measured physical quantity: such as: force, pressure, displacement, temperature, angle sensor, etc.; 

 2 
 According to the working principle of the sensor: for example: strain sensor, piezoelectric sensor, piezoresistive sensor, inductive sensor, capacitive sensor, photoelectric sensor, etc.; 

 3 
 According to the way the sensor converts energy: 

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 1 
 Energy conversion type: such as: piezoelectric, thermocouple, photoelectric sensor, etc.; 

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 2 
 Energy control type: such as: resistive, inductive, Hall-type sensors and thermistors, photoresistors, humidity-sensitive resistors, etc.; 

 4 
 According to the working mechanism of the sensor: 

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 1 
 ) Structure type: such as: inductive, capacitive sensor, etc.; 

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 2 
 Physical properties: such as: piezoelectric, photoelectric, various semiconductor sensors; 

 5 
 According to the form of the sensor output signal: 

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 1 
 ) analog: the sensor output is the analog voltage; 

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 2 
 Digital: The sensor output is digital, such as an encoder sensor. 

 6 
 According to the energy conversion principle, it can be divided into: 

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 1 
 Active sensors: Active sensors convert non-electricity into electrical energy, such as electromotive force, charge sensors, etc. 


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 2 
 Passive sensors: Passive program sensors do not have the energy conversion effect, but only convert the measured non-electricity into electrical parameters, such as resistive, inductive and capacitive luminescence sensors. 

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