Overview
Paris Metro wished to enhance the protection of lots of of development staff in tunnels with Litum, whereas increasing its underground rail line. Litum’s lone worker security answer that accompanied the development venture consisted of UWB RFID-based sensors worn by personnel, and their location information was collected by means of a mesh community arrange within the tunnel for emergency reporting.
Goal
A system that might guarantee employee security all through the multi-year venture.
Expertise
Supported by Litum propriatery software program, battery operated UWB RFID tags, anchors, gateways are put in within the development space
Integration
Built-in with the corporate’s time and attendance system for headcount accuracy.
The Firm
The venture commenced in 2017 and was overseen by public enterprise Société du Grand Paris. It consists of a number of new rapid-transit traces within the Paris area. The newest rail line includes 5 stretches of tunnel, totaling 33 kilometers (20 miles) and requires roughly 400 staff. A tunnel boring machine (TBM) is used to drill out the tunnel.
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The enterprise downside
The venture needed to meet strict security rules permitting solely approved staff in restricted areas. Additionally staff had been tracked real-time to keep away from unsafe behaviours.
The Options
The venture needed to meet strict security rules permitting solely authorised staff in restricted areas. Additionally staff had been tracked real-time to keep away from unsafe behaviours. All staff had been supplied with tags and anchors that talk with the badges had been put in througout the tunnel. Every employee is assigned an ID badge that’s hooked up to that individual’s hardhat when reporting to the job web site.
The distinctive ID quantity transmitted by the battery- powered badge is linked to the worker ID and job title in Litum IoT software program. The system forwards every tag ID and its location by way of the mesh community construction.
The exact location of tags is calculated by Litum location engine software program by utilizing proprietary algorithms. Thus, as every employee strikes across the worksite and thru the tunnel, the placement data is displayed on a dashboard map as a dot in actual time.
Within the occasion of an incident, comparable to an unauthorized particular person coming into a restricted space, an alert is issued on to managers or supervisors onsite, who can then rapidly handle the issue.
For emergencies, the system prompts every worker’s badge to vibrate and make an audible warning, and the software program can show every employee’s location on a mounted display screen to point evacuation routes.
Challenges
The primary problem was to create a community inside underground tunnels the place working setting is harsh and often very unpredictable.
Amplifiers had been used to reinforce bandwidth inside tunnels.
IP67 rated {hardware} most well-liked to satisfy the calls for of the cruel working setting.
All through the tunnel, RTLS UWB nodes had been put in each 100 meters as a precaution for every other emergencies in order that staff may activate the alarm system.