Marching in Formation

Mobile Science Museum · Optics

Operation: First turn the handwheel slowly, then turn it at a suitable speed and observe the phenomenon. Function Overview: The exhibit consists of a turntable, walking figure models, a strobe light device, etc. When the turntable is rotated, the strobe light flashes, and a continuous animation of a queue marching is seen. Scientific Principle: Why do the figures in various poses on the turntable start to move when the handwheel is turned at a suitable speed? At the same time, you can see the dog beside the figures and the reflection below also moving regularly? When the human eye observes a scene, light signals are transmitted to the brain via the optic nerve to form vision, but after the light ceases, the visual image in the brain does not disappear immediately; it persists for 0.1 to 0.4 seconds. This is the phenomenon of persistence of vision. When the disc rotates, figures in different poses appear repeatedly. Before one image in the brain has completely faded, the next slightly different image appears. Multiple images superimpose in the brain, creating the illusion of continuous motion. At this time, when the flashing frequency of the strobe light matches the movement frequency of the figures, the two merge, and we see frozen images of the figures. Thus, under the combined effect of 'persistence of vision' and the strobe light, a series of frozen images form the continuous motion of the marching figures. Movies and animated films are made based on this principle. Look around—what other exhibits use the persistence of vision phenomenon?

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• China Science and Technology Museum Standard Edition CSTM Standard Edition
  Dimensions (unit: m): 0.75×0.68×1.30 Brand: KexMall Model: PopsciCat-Mobile-025 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Protective casing: transparent acrylic + orange acrylic ⑥ Figures: photosensitive resin 3D printing 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with KexMall® K1 special PLC controller with protection for science exhibits ② Switching power supply: AC-DCS-60-12/24 input AC100-240V, 50/60Hz, output power 60W ③ Strobe light: high-brightness packaged LED ④ Control module: custom-made ⑤ Rotation sensor 3. Energy Requirements: AC100-240V, 50/60Hz 100W

  Operation: First turn the handwheel slowly, then turn it at a suitable speed and observe the phenomenon. Function Overview: The exhibit consists of a turntable, walking figure models, a strobe light device, etc. When the turntable is rotated, the strobe light flashes, and a continuous animation of a queue marching is seen. Scientific Principle: Why do the figures in various poses on the turntable start to move when the handwheel is turned at a suitable speed? At the same time, you can see the dog beside the figures and the reflection below also moving regularly? When the human eye observes a scene, light signals are transmitted to the brain via the optic nerve to form vision, but after the light ceases, the visual image in the brain does not disappear immediately; it persists for 0.1 to 0.4 seconds. This is the phenomenon of persistence of vision. When the disc rotates, figures in different poses appear repeatedly. Before one image in the brain has completely faded, the next slightly different image appears. Multiple images superimpose in the brain, creating the illusion of continuous motion. At this time, when the flashing frequency of the strobe light matches the movement frequency of the figures, the two merge, and we see frozen images of the figures. Thus, under the combined effect of 'persistence of vision' and the strobe light, a series of frozen images form the continuous motion of the marching figures. Movies and animated films are made based on this principle. Look around—what other exhibits use the persistence of vision phenomenon?

• Optimized Popular Edition Optimized Edition
  Dimensions (unit: m): 0.75×0.68×1.30 Brand: KexMall Model: PopsciCat-Mobile-025 1. Materials: ① Base: flame-retardant ABS injection molding, thickness ≧4mm ② Tabletop: compact laminate, thickness ≧12mm ③ Instruction sign: acrylic UV printing ④ Tabletop fasteners: standard triangular locks ⑤ Protective casing: transparent acrylic + orange acrylic ⑥ Figures: photosensitive resin 3D printing 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with KexMall® K1 special PLC controller with protection for science exhibits ② Switching power supply: AC-DCS-60-12/24 input AC100-240V, 50/60Hz, output power 60W ③ Strobe light: high-brightness packaged LED ④ Control module: custom-made ⑤ Rotation sensor 3. Energy Requirements: AC100-240V, 50/60Hz 100W

  Operation: First turn the handwheel slowly, then turn it at a suitable speed and observe the phenomenon. Function Overview: The exhibit consists of a turntable, walking figure models, a strobe light device, etc. When the turntable is rotated, the strobe light flashes, and a continuous animation of a queue marching is seen. Scientific Principle: Why do the figures in various poses on the turntable start to move when the handwheel is turned at a suitable speed? At the same time, you can see the dog beside the figures and the reflection below also moving regularly? When the human eye observes a scene, light signals are transmitted to the brain via the optic nerve to form vision, but after the light ceases, the visual image in the brain does not disappear immediately; it persists for 0.1 to 0.4 seconds. This is the phenomenon of persistence of vision. When the disc rotates, figures in different poses appear repeatedly. Before one image in the brain has completely faded, the next slightly different image appears. Multiple images superimpose in the brain, creating the illusion of continuous motion. At this time, when the flashing frequency of the strobe light matches the movement frequency of the figures, the two merge, and we see frozen images of the figures. Thus, under the combined effect of 'persistence of vision' and the strobe light, a series of frozen images form the continuous motion of the marching figures. Movies and animated films are made based on this principle. Look around—what other exhibits use the persistence of vision phenomenon?

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