sensor is a detection device that can sense the measured information and convert the detected information into electrical signals or other required forms of information output according to certain rules to meet the needs of information transmission, processing, storage, Display, recording and control requirements. It is the primary link to realize automatic detection and automatic control. There are many ways to classify sensors, which are distinguished according to different principles
According to the measured physical quantities such as force, pressure, displacement, temperature, angle sensors, etc.
According to the working principle of the sensor Divided into strain gauge sensors, piezoelectric sensors, piezoresistive sensors, inductive sensors, capacitive sensors, photoelectric sensors, etc.
, divided according to the way the sensor converts energy
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) Energy conversion types such as piezoelectric, thermocouple, photoelectric sensors, etc.
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) Energy control types such as resistive, inductive, Hall-type sensors, as well as thermistors, photoresistors, humidity sensors, etc. Resistance, etc.
, divided according to the working mechanism of the sensor
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) Structural types such as inductive, capacitive sensors, etc.
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) Physical types such as piezoelectric, photoelectric type, various semiconductor sensors, etc.
, divided according to the form of the sensor output signal
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) Analog sensor output is an analog voltage quantity
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) Digital The sensor output is a digital quantity, such as an encoder sensor.
, According to the principle of energy conversion, it can be divided into
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) Active sensors. Active sensors convert non-electrical quantities into electrical energy, such as electromotive force, charge sensors, etc.
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/>) Passive sensor Passive program sensor does not have the function of energy conversion, but only converts the measured non-electric quantity into electrical parameters, such as resistive, inductive and capacitive luminescent sensors.
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