The challenge system to notify the owner or person in charge of the opening of the fact / closing manhole telecommunications mine. The system consists of active sensors mounted in the shaft near the hatch and software in the center monitoring.
The sensor consists of 2 parts: a spring-loaded rod installed in the vicinity of the mine manhole and electronic unit mounted inside the shaft. Spring-loaded rod attached at one end to the shaft wall. Inside the rods are power wires, antenna cable, data cable (optional). The second end rods to be rectangular heel, orange color, with a warning inscription (STOP). Inside heel GSM antenna is installed. Optional inside heel can be fixed the following devices:
- Beeper – in the open manhole mode and disable the alarm, he takes a short sound pulses to warn pedestrians. In the case of tripping alarm (unauthorized access, theft of manhole), he works in a mode siren
- Warning lights – work in flashing mode with an open manhole. Additional warning information for pedestrians and vehicles
- RFID card sensor – designed for reading the employee card, opened manhole. Map information is transmitted to the monitoring center