Overview

Paris Metro wished to enhance the protection of lots of of development employees 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 way 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 employees. A tunnel boring machine (TBM) is used to drill out the tunnel.

The enterprise drawback

The venture needed to meet strict security laws permitting solely licensed employees in restricted areas. Additionally employees had been tracked real-time to keep away from unsafe behaviours.

The Options

The venture needed to meet strict security laws permitting solely authorised employees in restricted areas. Additionally employees had been tracked real-time to keep away from unsafe behaviours. All employees 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 connected to that individual’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 by utilizing 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, similar 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 principle problem was to create a community inside underground tunnels the place working atmosphere is harsh and often very unpredictable.

Amplifiers had been used to reinforce bandwidth inside tunnels.

IP67 rated {hardware} most popular to satisfy the calls for of the tough working atmosphere.

All through the tunnel, RTLS UWB nodes had been put in each 100 meters as a precaution for another emergencies in order that employees might activate the alarm system.