JPS6474694A - Entry detecting device - Google Patents

Abstract

PURPOSE:To distinguish the entry of a guest, trespasser etc., and to inform this entry in a simple constitution by detecting a matter to be detected like a human body, etc., via 1st and 2nd detecting means and using these detection signals to detect the state of each detection signal via a single direction detecting circuit so that the passing direction of the human body, etc. CONSTITUTION:A matter to be detected like a human body, etc., is detected by 1st and 2nd detecting means 1 and 2. Then 1st and 2nd pulse generating circuit 5 and 6 produce the 1st and 2nd pulse signals in response to those detection signals of both means 1 and 2. Both 1st and 2nd pulse signals are supplied to a single direction detecting circuit 7. A delay circuit of the circuit 7 delays the 1st pulse received from the circuit 5 by a prescribed time. At the same time, an inhibiting circuit of the circuit 7 delivers an inhibiting signal based on the continuous pulses received from the delay circuit and the 2nd pulse given from the circuit 6. Then a detection signal generating circuit of the circuit 7 delivers the information signals to an LED lighting circuit 8 and a remote control circuit 9 only when the pulse signal of the circuit 5 is supplied prior to the inhibiting signal received from the inhibiting circuit.