what are the different types of sensors and their applications?
What Are The Different Types Of Sensors And Their Applications?
They always sound so high tech that we hardly notice that our day-to-day lives always involve the use of sensors. From IR sensors in TV remotes to passive infrared sensors on automatic doors or LDRs for outdoor and street lightings, sensors are everywhere.
Sensors detect changes, acknowledge those changes, and produce outputs from those changes. They detect and measure qualities such as light, temperature, sound, and other types of output from the environment. There are many different types of sensors including speed, temperature, PIR, and ultrasonic sensors.
Speed sensors are used to, as the name suggests, detect speed. This type of sensor is typically used to synchronize the speed of multiple motors. One of the motors is a main motor acting as a transmitter while the remaining motors act as receivers.
Temperature sensors measure temperature using an electrical signal. These sensors fall under two categories: contact type and non-contact type sensors. These are further divided into mechanical and electrical temperature sensors. Typically, these sensors are used for controlling the temperature of devices in industrial applications.
PIR sensors measure infrared light radiation emitted from objects. This type of sensor is split into two parts, both parts sensitive to infrared radiation. A positive charge occurs when an object comes into the field of view of the laser, and a negative charge emits when an object leaves the field of view. These sensors are most commonly used in automatic doors because the infrared sensors can detect when there is body movement nearby.
Ultrasonic sensors are used to measure the distance of objects. They send out sound waves and interpret how long it takes for the echoes produced to bounce back and be received by the same sensor.
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