![]() To turn off the artificial lights in rooms, the best and least expensive control is YOU. If a room is empty, why is artificial light needed? If enough "free" light from the sun can light our rooms, then why waste energy to produce electric light? Lighting controls can also turn the lights off when no one is in the room. How can we do that? Lighting controls are a great way to reduce lighting energy.Ĭontrols can dim the lights or turn them off completely when the light produced from the sun is bright enough. That's a lot! To be responsible with our energy expenditures, it is important that we reduce the energy used for lighting, while still making sure that we can see and enjoy our indoor spaces. Lighting is responsible for nearly one-third of the electricity consumption in most buildings. (Begin by showing students the attached 13-slide Beating the Motion Sensor Presentation, a PowerPoint file.) A wall-mounted ultrasonic motion sensor detects room movement and controls lighting.Ĭan You Trip It? Worksheet (pdf) Visit [ to print or download. light socket with attached wiring and light bulb, preferably red (for use with the ultrasonic sensor)įigure 2.(optional) ultrasonic motion sensor (ultrasonic sensors are typically used in commercial buildings, see Figure 2 available online for $50-100 if possible, purchase a sensor that is designed to mount to a wall, not a ceiling).passive infrared sensor with a light bulb, preferably red (a PIR sensor is a motion sensor-controlled socket, see Figure 1 available in the lighting sections of home improvement stores).2 inch x 2 inch plywood square one per testing station (use 1/2-inch plywood so it is sturdy).Testing station(s) to share with the entire class: Can You Trip It? Worksheet, one per person.8-10 wooden craft (Popsicle) sticks or plastic straws.6-inch embroidery hoop (for fabric frame).6 inch x 6 inch pieces of the following materials (purchased at hobby and/or hardware stores):1/16-inch thick aluminum, ceramic tile, 1/8-inch acrylic/Plexiglas, 1/8-inch wood veneer.1 disposable hand warmer (typically found at outdoor stores, pharmacies or online from large retailers).1 toy LEGO ® racer car (or other pre-made toy car that rolls smoothly across a table and is less than 6 inches long).Explain why a motion sensor did, or did not, "see" a moving object because of the way in which materials interacted with it.Describe how different materials interact with heat and sound waves.Describe how the two main types of motion sensors (passive infrared, or PIR, and ultrasonic) detect motion using heat and sound waves. ![]() Students in this activity act as engineers making decisions like those made during commercial building design.Īfter this activity, students should be able to: They also determine what types of sensors are most appropriate for each space type and the amount of use it receives. Architectural engineers are often involved in designing the systems that control building lighting, heating and cooling systems. Through this activity, students experience how different types of common building and furniture materials interact with motion detection technology, and extend that knowledge into the field of architectural engineering. ![]() This engineering curriculum aligns to Next Generation Science Standards ( NGSS). In this activity, students explore material properties as they relate to motion detection, and use that knowledge to make design judgments about what types of motion detectors to use in specific applications. This process can be automated using motion sensors. One of the best ways to conserve energy is to make sure the lights are turned off when no one is in a room. Lighting is responsible for nearly one-third of the electricity use in buildings.
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