Sensing physical occurrences is an important part of any Internet of Things application, and sensors may help with that.
Sensors:
Transducers are a term that encompasses both sensors and actuators. Transducers are devices that transfer one type of energy into another type of energy. The following are some examples of common transducers:
| The Measurement of Quality | The device used for input (Sensors) | Device for generating output (Actuators) |
| Light | Light Dependent Resistor (LDR) Photo Diode Phototransistor Solar cell |
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| Temperature | Thermostat Temperature Detectors that are Resistive (RTD) Thermocouple Thermistor | Electromagnetic vibrations Jacks and Lifts |
| Speed | Reflective/slotted opt coupler Doppler effect sensors Tacho – generator | Stepper Motor Brake AC and DC Motors |
| Sound | Piezoelectric crystal Carbon microphone | Buzzer Loudspeaker Bell |
| Position | Reflective/slotted opto-switch LVDT Potentiometer Encoders | Solenoid Panel Meters Motor |
A sensor is a transducer that converts an electrical signal from a physical phenomena. Sensors connect electrical equipment like microcontrollers/microprocessors, computers, and other sensors to the physical world. Multiple transducers can be found in sensors. If converting chemical energy to electrical energy is challenging, a sensor with many transducers is used.
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2021-10-06 14:07:03