| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pseudo radar type obstacle detecting device accurately detecting an obstacle. SOLUTION: In an obstacle detecting device laying a leakage transmission path along a road or line in both sides thereof emitting a radio wave from one leakage transmission path 1 to the other leakage transmission path 2 to detect an obstacle, to one end of one leakage transmissions path 1, a transmitter 3 generating a pulse-state signal is connected, also to one end of the same side of the other leakage transmission path 2, a receiver 4 receiving a signal delayed in accordance with a position of the pulse-state signal is connected, and in this receiver 4, a filter 7 taking out an envelope from a signal waveform is connected, a memory device 5 storing an envelope of a signal waveform previously without an obstacle is provided, an arithmetic device 6 is provided, which detects a position of the obstacle from a differential waveform between the envelope without this obstacle and the envelope taking out the filter 7.</p> |
