PURPOSE: To collect the traffic information with low cost and correctly, by arranging a plurality of photo electric conversion elements on the image forming plane of lens which is the objective of road surface and by detecting the traffic flow with the varying points of electric signal.
CONSTITUTION: On the image forming plane 3 of the lens system objective of the road surface to collect the traffic information, a plurality of photo electric conversion elements a to n are located along lengthwise the road picture 4. Further, the varying points of electric signal of the elements a to n with the traffic flow are converted into pulse signal with the amplifying circuit 5, differentiation circuit 6, comparison circuit 7 and flip flop circuit 8, for expample. Next, the output signal of the circuit 8 in a given time is scanned with the multi-selector 9, converting it into a timing serial signal. After that, the circuit 8 is reset and the serial signal is delivered to remote location with the telephone line 11.
OOYAMA NAOTAKE
MATSUMOTO TOSHINORI
IMAI KOUJI
| JPS503597A | 1975-01-14 | |||
| JPS4974853A | 1974-07-19 | |||
| JPS5118593A | 1976-02-14 |