| 摘要 |
PURPOSE:To attain the satisfactory communication of a signal reflection type by using a posture information setting means which sets the posture information of a signal reflecting member in response to the reception level and a drive energizing means which energizes a drive source means of a drive mechanism in accordance with said posture information. CONSTITUTION:The elevation angles of an optical signal transmitter 100 and an optical signal receiver 300 are set so that the optical axes of the transmitter 100 and the receiver 300 are turned to the center of a reflecting plate 200 of a reflecting plate unit 200. Under such conditions, a posture setting unit 310 connected to the receiver 300 has the maximum optical signal. The posture information on the plate 210 is set and converted into radio signals to be transmitted through a transmission antenna Ant1. Receiving the radio signals through a reception antenna Ant2, the unit 200 performs the posture control of the plate 210 based on the posture information included in the radio signals. In such a way, the posture of the plate 210 is controlled and therefore the direct optical signal 110 received from the transmitter 100 is reflected by the plate 210 and received accurately by the receiver 300 in the form of a reflected optical signal 120. |
