| 摘要 |
A monitoring system for energization of traffic lamps (L 1 . . . L 8), with energy supplied from a common voltage source. Protection is provided so that energization of any one of the lamps is not in conflict with energization of another lamp. The system includes a conflict detection means (CD) having a set of inputs respectively connected to monitor individual lamps so that respective inputs of the set are activated in response to energization of respective lamps. The conflict detection means generate conflict signifying information in response to simultaneous activation of combinations of inputs. A signal group generator (SGG) feeds to the inputs a sequence of data signal groups each simultating a conflict or a non-conflict combination at the inputs. The resultant information produced by the conflict detection means (CD) is checked for correctness by a verification means under common control with the signal generator. The signal groups being fed to the inputs within short intervals during blank time-spaces when no information is fed thereto. A processor (CPU) has an acceptance limit for producing conflict-warning information in responce to conflict signifying information within the acceptance limit. This limit is chosen so that the processor is non-responsive to conflict signifying information resulting from data present only within such simulation signal intervals. |
