Doppler Effect
★Exhibit Content: Popular science on the principle and applications of the Doppler effect ★Interaction: Desktop electromechanical interactive device ★Operation: 1. After visitors press the two start buttons, the control box moves at a constant speed and emits sound; 2. As the control box rotates, the sound heard by visitors changes: when the control box moves away, the pitch gradually lowers; when the control box approaches, the pitch rises again; 3. Understand the Doppler effect. ★Exhibit Description: The exhibit consists of a circular base, a rotating rod, a built-in buzzer, a gear motor, and control buttons. It is a recommended exhibit from the KexMall. The buzzer performs uniform circular motion with the rotating rod. Due to relative motion with the audience, the frequency of the sound heard by the audience changes, clearly demonstrating the principle of the Doppler effect. Through the intuitive changes in sound, the exhibit makes an abstract physical phenomenon tangible, making it suitable for science popularization displays in science and technology museums, youth activity centers, and physics science exhibition areas. ★Scientific Principle: This exhibit is based on the Doppler effect: Through the uniform circular motion of the buzzer, the exhibit intuitively demonstrates the influence of relative motion on sound wave frequency. The Doppler effect is named in honor of the Austrian physicist and mathematician Christian Johann Doppler, who first proposed this theory in 1842. Its main content is that the wavelength radiated by an object changes due to the relative motion between the wave source and the observer. In front of a moving wave source, the waves are compressed, the wavelength becomes shorter, and the frequency becomes higher; behind the moving wave source, the opposite effect occurs, the wavelength becomes longer, and the frequency becomes lower; the higher the speed of the wave source, the greater the effect produced. Based on the degree of red (or blue) shift, the speed of the wave source moving along the observation direction can be calculated.
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- Φ1.0×1.0 Φ1.0×1.0Dimensions (unit: m): Φ1.0×1.0 Brand: KexMall Model: PopsciCat-Wave-011 1. Materials ① Base: 30 square tube frame, 2.0mm cold-rolled steel enclosure, surface baked paint ② Tabletop: Kelesi artificial stone, thickness ≥12mm ③ Protective cover: Acrylic transparent protective cover, anti-mistouch and dustproof ④ Accessories: Custom bearings, fasteners, cable conduits, etc. 2. Main Configuration ① Turntable device: Custom rotating rod, control box (built-in buzzer) ② Transmission mechanism: Custom gear motor + transmission system to achieve uniform circular motion ③ Buzzer: Custom high-fidelity sound unit, fixed at the end of the rotating rod ④ Electromechanical interactive device: Custom dual start buttons, status indicator light, emergency stop button ⑤ Electrical control: Electrical logic control system, equipped with a PLC controller with protection specially for science exhibits, to achieve speed regulation and sound control 3. Installation Requirements ① Power requirement: AC100-240V, 50/60Hz300W (standard three-wire socket, reliably grounded) ② Installation foundation: Direct placement, requires a level floor ③ Entry passage: Door frame dimensions (width × height) ≥1.5m×1.5m, continuous turning interval in the passage ≥2m ④ Maintenance access: Not required
★Exhibit Content: Popular science on the principle and applications of the Doppler effect ★Interaction: Desktop electromechanical interactive device ★Operation: 1. After visitors press the two start buttons, the control box moves at a constant speed and emits sound; 2. As the control box rotates, the sound heard by visitors changes: when the control box moves away, the pitch gradually lowers; when the control box approaches, the pitch rises again; 3. Understand the Doppler effect. ★Exhibit Description: The exhibit consists of a circular base, a rotating rod, a built-in buzzer, a gear motor, and control buttons. It is a recommended exhibit from the KexMall. The buzzer performs uniform circular motion with the rotating rod. Due to relative motion with the audience, the frequency of the sound heard by the audience changes, clearly demonstrating the principle of the Doppler effect. Through the intuitive changes in sound, the exhibit makes an abstract physical phenomenon tangible, making it suitable for science popularization displays in science and technology museums, youth activity centers, and physics science exhibition areas. ★Scientific Principle: This exhibit is based on the Doppler effect: Through the uniform circular motion of the buzzer, the exhibit intuitively demonstrates the influence of relative motion on sound wave frequency. The Doppler effect is named in honor of the Austrian physicist and mathematician Christian Johann Doppler, who first proposed this theory in 1842. Its main content is that the wavelength radiated by an object changes due to the relative motion between the wave source and the observer. In front of a moving wave source, the waves are compressed, the wavelength becomes shorter, and the frequency becomes higher; behind the moving wave source, the opposite effect occurs, the wavelength becomes longer, and the frequency becomes lower; the higher the speed of the wave source, the greater the effect produced. Based on the degree of red (or blue) shift, the speed of the wave source moving along the observation direction can be calculated.
Review
Principle Display: ★★ Interaction Effect: ★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★