| 摘要 |
PURPOSE:To provide a traffic fare collection/reception device where the influence of window glass in a vehicle, which occurs in the past, can be reduced and a radio signal from a radio card loaded on the objective vehicle can always and stably be received. CONSTITUTION:Two antennas 7 and 8 as reception antennas are installed by leaving a prescribed interval. Respective reception signals are transmitted to detection/demodulation parts 13 and 14 at the time of receiving a radio wave from the radio card P, and the signals are detected and demodulated. Detection output signals Va and Vb are transmitted to a comparator 15 and respective demodulation data are transmitted to a selection part 16. The comparator 15 level-compares the detection output signals Va and Vb, and outputs the compared result to a selection part 16. When the level of the detection output signal Va is higher as the result of the comparison of the comparator 15, demodulation data from the detection/demodulation part 13 is selected. When the level of the detection output signal Vb is higher, demodulation data from the detection/ demodulation part 14 is selected. |
