| 摘要 |
Control nodes 16 monitor the operating parameters of streetlights 12, 20, and transmit them over a communication network 14 to a personal computer (PC) 10 where they are logged on a database 32 which can in turn be interrogated by lap top computers 40. Operating parameter data may include: lamp voltage; lamp power; ballast temperature; mains voltage; lamp failure; weak lamp signal; photocell operational signal; mains interruption; tilt signal and illumination time. The system may store data from a group of 100 or more lamps and be used to predict lamp failure and provide warning when a lamp 12 has a predicted life of less than 300 hours. Communication network 14 may comprise: mains wiring; radio signals; and a mobile phone GSM network. Data may be transmitted using short message service (SMS) text and be coded as a series of alphanumeric digits. Mobile phones 30 carried by engineers may be used to monitor, query, test and control a series of lamps 12, 20. |
