| 摘要 |
<p>PURPOSE:To mount a nighttime rear-end collision warning device on a vehicle with ease without power from a power supply for the vehicle by providing a battery which can be charged by a solar battery and can supply power to each means and a switching means which turns on or off connection between the battery and each means according to the output from the solar battery. CONSTITUTION:When generated voltage is larger than the given value stored in a sunshine judging switch circuit 13, a switch is turned off, starting a secondary battery charging mode. In this battery charging mode, such an electric current as shown by an arrow mark A is generated, and a secondary battery is charged with all the power generated in a solar battery 2, preventing a vibration detection circuit 14, head lamp light detection circuit 15 and oscillation output circuit 16 from operating. On the other hand, when the voltage generated in the solar battery is smaller than the given value, the switch is turned on, starting a secondary battery outputting mode. In this outputting mode, such electric current as shown by an arrow mark B in grourated, operating the vibration detection circuit 14, head lamp light detection circuit and oscillation output circuit 16.</p> |
