| 摘要 |
The system has an alarm device with an adapter (6) for attachment to a road safety device. The safety device is provided with a movable switch and/or an electronic position detecting device with corresponding switching module and a radio-transmitter. A radio-receiver is positioned remote from the transmitter. The radio receiver is either in connection with a vehicle and with its signal device or operates as self-sufficient system. The receiver triggers an acoustic alarm due to its position changing, after receiving a signal from the transmitter. |
