| 摘要 |
PURPOSE: A teaching aid for basic principle education of a flood warning system is provided to maximize an education delivery effect for flood. CONSTITUTION: A water tank(20) is opened upwards. The water tank stores water in inside and is installed at the internal floor of a case(10) for bridge installation. A bridge(30) comprises a pair of bridge pier connectors(31), a pair of first bridge piers(32), a pair of second bridge piers(33), and a bridge top plate(34). A buoy(40) is installed between the pair of second bridge piers which can be ascended and descended. A magnet(50) is installed to be exposed to the buoy. A switch is installed at the upper side between the pair of second bridge piers and connects or blocks the flow of electricity through the magnet. A buzzer(70) transfers warning tone to outside. |
