Start with a Door That Can Notice
This poster does not need to begin with an abstract robot. Start with an automatic door found in a supermarket, mall, or public building. Place the main question above the door frame: How does an automatic door know that someone is nearby? Build the whole poster around one simple route: a sensor notices a change, a controller makes a decision, and a motor moves the door.
A Four-Scene Mini Story
- Someone approaches: Draw a child with a schoolbag and a line of footprints to show that the person has entered the sensing area.
- The sensor notices: Add a small sensing device above the door, with curved lines or dots to show it is watching for changes.
- The controller decides: Draw a small control box and connect it to the sensor with an arrow. Add the words “Signal received, ready to open.”
- The motor acts: Draw the two doors sliding apart, then add a return arrow labeled “close safely.”
Use the Door Frame as Your Layout
Try a horizontal page with a large automatic door in the center. The door frame can be both the main illustration and the visual line that connects every section. Put the title above the door, place the four-scene story on the left, explain key terms on the right, and add daily observations and safety tips along the bottom.
- Above the door: Write the title and a short subtitle such as “Machines can sense changes around them.”
- Left side: Show the sequence “approach—notice—decide—open” in small connected scenes.
- Right side: Use three colored cards to explain the sensor, controller, and motor.
- Bottom strip: Add a section called “What other automatic devices have I seen?” to invite readers to think.
Three Text Blocks You Can Copy
A Quick Fact Card
Automatic door fact: An automatic door first uses a sensor to detect a nearby change. The information goes to a controller. If the conditions are right, the controller tells a motor to open the door. When the person leaves the sensing area, the door can close according to its settings.
My Daily-Life Observation
I have seen automatic doors, touchless faucets, and elevator doors. Some detect a person approaching, while others detect the position of a hand. Their common pattern is simple: notice a change, make a decision, and complete an action.
Safety Tips
- Do not put your hands or feet into a door gap on purpose.
- Walk through an automatic door in line instead of running or playing near it.
- Tell an adult or staff member if the door does not work normally.
Turn the Principle into Easy-to-Read Pictures
Draw the sensor as a small eye or radar wave above the door. Show the controller as a box with buttons, and use gears, a shaft, and curved arrows to represent the motor. Blue can stand for sensing, orange for deciding, and green for action. Keep each text box short, with only two or three lines, and leave some empty space for a cleaner page.
Finish in Five Simple Passes
- Lightly sketch the door frame, the four scenes, and the three keyword cards.
- Write the title and main text first, then adjust the boxes to fit the words.
- Complete the main drawings of the door, child, arrows, and sensing waves.
- Use colored pens to emphasize section titles and keep arrows and speech boxes consistent.
- Check that the words are readable and the process is easy to follow, then add a few gears, stars, or circuit lines.
If you want to organize the sections, colors, and layout more quickly, scan into the WeChat mini program “智慧手抄报” and continue turning this automatic-door idea into a finished handwritten poster.
