A transducer /sensor is a detecting device that converts physical information such as sound, light, length (including distance, height, etc.), force, temperature, and the like into electrical information that is relatively easy to process and transmit. It can sense the information being measured, and can transform the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control.
(1) The sensor is a sensory organ for various measurement and automatic control. It can sense external information like a human sensory organ, and can convert this information into a device or device that can output information according to certain rules and requirements.
(2) Sensors often experience non-electrical quantities such as light, sound, magnetism, force, displacement, temperature, concentration, velocity, pH, etc.; and its output is mostly electrical quantities, such as voltage, current, charge, etc.
(3) commonly used sensors are ultrasonic sensors, temperature sensors, infrared sensors, biosensors, pressure sensors, etc.
(4) Temperature sensor and infrared sensor are applied to rice cooker and satellite remote sensing respectively.
The competition in today's society is becoming more and more fierce, and the outcome depends largely on the acquisition and use of information. In 1946, the world's first electronic computer was born. At the beginning, this computer was extremely large and limited in computing power, but the development of computers was very rapid. Today, computers have been applied in all aspects of life. As the center of information acquisition and analysis, the invention of computers has undoubtedly played a powerful role in the acquisition and use of information.
Nowadays, our life production is inseparable from sensors. Sounds, light-sensitive lamps, elevators, cars, motorcycles, security systems, medical examinations, etc. in our home corridors are inseparable from sensors and information processing systems. It is impossible to imagine what kind of “original ecological society” the world without sensors and processing systems is.