Sensor

A Sensor is a detection device that can sense the measured information, and can transform the sensed information into electrical signals or other required forms of information output according to certain rules, so as to meet the requirements of information transmission, processing, storage and display. , recording and control requirements.
The characteristics of sensors include: miniaturization, digitization, intelligence, multi-function, systematization, and networking. It is the first link to realize automatic detection and automatic control. It is usually divided into ten categories according to its basic sensing functions, including thermal elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic-sensitive elements, humidity-sensitive elements, sound-sensitive elements, radiation-sensitive elements, color-sensitive elements, and taste-sensitive elements. .
Displacement sensor, also known as linear sensor, is a sensor that converts displacement into electricity. Displacement sensor is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electricity. It is divided into inductive displacement sensors, capacitive displacement sensors, photoelectric displacement sensors, ultrasonic displacement sensors, and Hall. displacement sensor.
Hall sensor is a magnetic field sensor made according to the Hall effect, which is widely used in industrial automation technology, detection technology and information processing. The Hall effect is a fundamental method to study the properties of semiconductor materials. The Hall coefficient measured by the Hall effect experiment can determine important parameters such as the conductivity type, carrier concentration and carrier mobility of the semiconductor material.
Hall sensors are divided into two types: linear Hall sensors and switching Hall sensors: linear Hall sensors are composed of Hall elements, linear amplifiers and emitter followers, which output analog quantities; switch Hall sensors are composed of stable It consists of a voltage regulator, a Hall element, a differential amplifier, a Schmitt trigger and an output stage, which outputs digital quantities.