| 摘要 |
PURPOSE:To provide degree of freedom toward fitting direction of a photoelectric detector and to detect non-directivity, by using two sets of outputs of photoelectric detection selectively via a 3-position changeover switch. CONSTITUTION:When two-sets of 3-position mode changeover switches SW1 are respectively connected to terminals S11 and S21, high level outputs detecting the light interruption due to a personnel from the 1st and 2nd photoelectric elements PT1 and PT2 of the Schmitt circuits 1 and 2 are applied to a data terminal D1 and a clock terminal CPU1 of a D type flip-flop DFF1. A D type flip-flop DFF2 and a relay RY1 are controlled and a personnel from the element PT1 to the PT2 is detected. When the switches SW1 are selected to contacts S13, S23, a personnel moving to opposite direction is detected. Further, connected to the contacts S12 and S22, a personnel to any direction can be detected. Through the constitution like this, the degree of freedom can be given to the fitting direction of a photoelectric detector and the detection with non-directivity can be performed. |
