A concept of security

Funkwerk has devised an end-to-end safety and security solution for people working in hazardous environments such as the oil and gas industries and chemical and industrial plants

A concept of security

When implementing a safety and security solution, companies have to know for certain that system they have selected satisfies the latest technical guidelines and national regulatory requirements.

The infrastructure of such a system solution comprises a variety of components which altogether must maintain the safety of the workforce. Apart from that, they also have to meet the specific requirements of the company.

Alerting, localisation and TETRA

In an emergency you need to have the means to submit a respective signal notifying an alarm control center (ACC) which, based on location information and the type of alarm, initiates an alarm procedure. The steps to be taken within the procedure are normally predefined.

A prerequisite of paramount importance is that the radio system forms a dependable transport layer for signal exchange and as such connects the worker with the ACC. Funkwerk’s TETRA Secury System utilises a TETRA radio network for this purpose, either an existing one or a network that is to be deployed.

The TETRA Secury System also includes the TETRA Secury Server (ACC), the TETRA Safe radio system, TETRA handheld terminals and small beacon devices exploiting an inductive low frequency localisation method. Thus, the company is a one-stop shop for its customers.

TETRA terminals and integrated sensors

As part of the TETRA Secury System, the Funkwerk FT4S handheld provides mobile personal security for workers in hazardous workplaces, both outdoor and indoor. In addition to standard TETRA functionality, the FT4S terminal features sensors for localisation and alarm signal generation.

An alarm may be generated manually, by no-motion detection, by position of the radio terminal on man-down, by losing a fixture device or when a time limit is exceeded with no reaction. Continuously monitoring the radio contact between the ACC and the FT4S terminal adds a further alarm source in case the radio fails to acknowledge a life check.

Outdoor localisation may be facilitated by a built-in GPS receiver. The FT4S terminal is available as an intrinsically-safe radio, satisfying even the harshest demands of industrial environments.

Inductive localisation beacons

A person in distress can be precisely located by means of inductive localisation beacons (ILB). Working at a low frequency of 65kHz, coils are utilised for magnetic coupling between transmitter and receiver; i.e. between ILB device and FT4S terminal, thereby avoiding signal attenuation due to dielectric losses and reflections.

Programming of the device for address and localisation range is performed without opening it. The housing is IP65 certified and allows freedom in selecting the position where the ILB device is mounted.

TETRA Safe – resilient and scalable

The compact system is easy to install and integrates a base station, switching and gateways in a single cabinet. In order to meet the highest security and system availability demands, the main components of TETRA Safe can be implemented with redundancy built in if required.

The system comprises an IP-based architecture and standard interfaces for connections to external applications. Designed for scalability, it is a modular structure and allows for flexible expansion.

TETRA Secury Server

Based on a client-server approach with multi-client capability, the TETRA Secury software runs on a professional server PC, designed for 24/7 continuous operation. Alarms are evaluated and forwarded to the clients connected to it. Simultaneously, notifications are sent out to FT4S terminals and, as an option, to pagers.

Furthermore, notifications may also be submitted as an email or SMS, or even as a command to an external alarm system, e.g. fire alarm or sirens.

At the client’s workstation, alarms and locations are visualised using maps and floor plans. The client software enables efficient alarm management by guiding the operator step-by-step through the alarm procedure.

Written by Wireless magazine
Wireless magazine


  1. Max
    Hans-Ulrich Zerbst 12th Oct 2012

    The system solution presented appears to be suitable for more than those fields stated above everywhere where lone workers have to their jobs in hazar...

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