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In the Arduino sensor introductory course, we learned about various types of sensors. To further consolidate our knowledge, Tech Classroom is launching a new series called “Sensors in Daily Life” over the next few weeks, using videos to introduce how these sensors work and their applications in life and art.
Generally, infrared sensors refer to infrared proximity sensors, which work by detecting the frequency of electromagnetic radiation emitted by objects. Any object with a temperature above absolute zero emits electromagnetic radiation. The frequency of electromagnetic radiation emitted by humans falls into the infrared range. By monitoring this specific infrared frequency, infrared proximity sensors can determine if someone is present.
Infrared sensors are commonly used in automatic sensing toilets, infrared alarms, automatic doors, and automatic sensing faucets. They are also utilized by artists in the creation of art installations. The artwork “Moving On” uses infrared sensors to detect if there is a human infrared signal under the light. When a hand is extended, the infrared sensor detects the signal, and the device automatically powers on; when the hand is withdrawn, the infrared sensor loses the signal, and the device automatically powers off.
Another artwork, “Lift,” features infrared pyroelectric sensors installed on each wing. The function of infrared pyroelectric sensors is similar to that of infrared proximity sensors. When the sensor detects the approach of a human, the wings will automatically rise, and when the human moves away, they will automatically fall.
Infrared distance sensors are another type of sensor that operates using infrared light. Unlike passive infrared sensors that receive signals, infrared distance sensors actively emit infrared light. When the infrared light encounters an object, it reflects back, and when the infrared receiver receives the reflected signal, it calculates the distance. This type of sensor is typically used in warehouse robots for position identification, distance detection, and more.
Using Arduino open-source hardware, you can easily create intelligent hardware projects with sensors. Centered around the Arduino theme, Tech Classroom has launched a series of rich Arduino learning courses for you to explore!
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Click “Read the Original” to learn the Arduino sensor introductory course.