Overview
Paris Metro needed to enhance the protection of tons of of building employees in tunnels with Litum, whereas increasing its underground rail line. Litum’s lone worker security resolution that accompanied the development venture consisted of UWB RFID-based sensors worn by personnel, and their location knowledge was collected by a mesh community arrange within the tunnel for emergency reporting.
Goal
A system that may guarantee employee security all through the multi-year venture.
Know-how
Supported by Litum propriatery software program, battery operated UWB RFID tags, anchors, gateways are put in within the building 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 strains within the Paris area. The most recent rail line includes 5 stretches of tunnel, totaling 33 kilometers (20 miles) and requires roughly 400 employees. 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 employees in restricted areas. Additionally employees have been tracked real-time to keep away from unsafe behaviours.
The Options
The venture needed to meet strict security rules permitting solely authorised employees in restricted areas. Additionally employees have been tracked real-time to keep away from unsafe behaviours. All employees have been supplied with tags and anchors that talk with the badges have been put in througout the tunnel. Every employee is assigned an ID badge that’s connected to that particular person’s hardhat when reporting to the job website.
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 through the use of proprietary algorithms. Thus, as every employee strikes across the worksite and thru the tunnel, the situation info is displayed on a dashboard map as a dot in actual time.
Within the occasion of an incident, resembling an unauthorized particular person getting 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 to point evacuation routes.
Challenges
The principle problem was to create a community inside underground tunnels the place working surroundings is harsh and often very unpredictable.
Amplifiers have been used to reinforce bandwidth inside tunnels.
IP67 rated {hardware} most well-liked to satisfy the calls for of the tough working surroundings.
All through the tunnel, RTLS UWB nodes have been put in each 100 meters as a precaution for every other emergencies in order that employees may activate the alarm system.
