| 摘要 |
PURPOSE:To realize the diagnosis with one driving circuit and eliminate the redundancy by supplying the control signal of the pulse where the pulse width is narrow when the microcomputer is achieving the diagnosis function compared with that when the microcomputer is achieving the collision judgement function, and a detonator is not ignited, to the driving circuit. CONSTITUTION:An input terminal of a driving circuit 18 is connected to an output terminal of a microcomputer 13, and the output terminal is connected to a control terminal of a switch circuit 8. The microcomputer 13 supplies the ignition pulse with different pulse width and the diagnosis pulse from one output terminal to one driving circuit 18. When the diagnosis pulse is supplied from the microcomputer 13 to the driving circuit 18, and the driving circuit 18 is failured and not driven, the switch circuit 18 is not turned on, and no current flows in a detonator 9, and the prescribed voltage is not generated in the point B, and the microcomputer 13 detects the failure. |
