Research reports

Reports within the safety research area

Grants are given to projects related to the safety and security of humans as well as of structures. Reports may cover subjects, such as

  • Traffic safety
  • Detection and fighting of fires
  • Lighting
  • Ventilation in buildings
  • Hearing aids

How to maintain the safety culture of an organization

Within complex high risk industries, a number of incidents and accidents have occured where the causes and the originations of the events cannot be attributed to technological aspects and factors alone. For these events flaws in an organzation's safety culture are instead often mentioned to have eroded and weakened the safety culture and the risk awareness of the socio-technical system, over time creating the necessary conditions for an accident/incident to happen. Organisations have therefoire, in different ways, implemented safety culture interventions to address flaws in the safety culture, often as a reactivitely response after an accident has happened. Both the industry and regulatory authorities have confimed that these interventions, in a general term, have shown effect and strengthened the safety culture. Thus a challenge enters for the industry - and a fear from the regulatory authorities - that the safety culture can degrade to the level prior to the interventions/accident/incident. A question then arises of how a safety culture can endure over time.


Niclas Grahn, ÅF-Infrastructure AB
Lotta Peacock, Tolemac Consulting AB

Cyber Security and Flexibility Analysis of Complex Systems

The work conducted in the ÅForsk sponsored project focus on 1) cyber security modeling, 2) flexibility analysis of holostic system-of-systems, 3) automatic data collection for these types of models and 4) reference architectures for complex industrial systems.


KTH; Robert Lagerström

Studies of new tools for analysis of telecommunication conflict

ÅF har arbetat med studier av telekonflikter och störskyddsfunktionalitet under flera decennier. Fram till åttiotalet handlade det vanligtvis om att analysera smalbandiga analoga radiosystem med en begränsad geografisk spridning. Utvecklingen inom radioområdet har därefter gått mot radionät uppbyggda av bredbandiga, digitala radiosystem, dessutom har antalet mobila radiosändare ökat dramatiskt under de senaste åren. En del problemställningar återkommer i olika uppdrag och det blir allt tydligare att en utveckling inom analysområdet måste ske.

ÅF har sedan ett antal år drivet ett projekt "Radioanalys", där metoder för olika typer av analyser och mätningar av radiosystem ses över och utveckling. Inom ramen för detta projekt har nu en studie kring telekonflikt och metoder för att analysera detta genomförts.

Detta studieuppdrag haf haft som mål att fastställda de behov som finns för att även i framtiden kunna göra korrekta analyser av telekonflikter. Följande behov har identifierats; utöka befintligt modellbibliotek med modeller som bättre kan hantera moderna och framtida systemparametrar och modulationsformer, förbättra användargränssnittet i ÅFs nuvarande mjukvaruverktyg för att beräkna telekonflikter samt dokumentera tillvägagångssätt där kombinationer av olika verktyg och metoder har använts för att kunna utföra träffsäkrare konfliktbedömningar.

Inom ramen för de identifierade behoven har visst arbete gjorts som även det redovisas i denna rapport. Främst har analys av modeller och vidareutveckling av ÅFs befintliga mjukvaruverktyg för telekonflitker påbörjats. ÅF har även under denna tidsperiod varit handledare för ett examensarbete inom området. Nägra resultat från detta examensarbete finns beskrivna i denna studie.


ÅF-Technology; Esbjörn Rotander

Akustik och säkerhet i inomhusarenor

The acoustics of many indoor areas are today unsatisfactory, which makes it difficult to understand spoken messages as well as messages from voice alarm systems. This can result in safety problems, but also disturb the experience of the event for the visitor, since the acoustics are essential for environmental qualities regarding comfort.

The overall project aim is to increase the safety and acoustic comfort in large indoor arenas. The following goals are attained in the project:

  • emphasizing problems within prescribed practice and legal framework for the design of indoor areanas intending to propose cost-effective solutions for further good acoustics and audibility;

  • investigating and straightening prescribed legal framework considering voice alarm systems intending to propose revision with particular interest in the question of responsibility;

  • presenting a model for quality assurance of voice alarm systems intending to prevent inaccurate and inadequate inspection

Voice alarm systems have been studied in three Swedish indoor arenas by means of technical measurements and a completing poll. The arenas included in the project are mainly used for ice hockey but also for music and a variety of other events. The overall conclusion of the evaluated data is that the speech intelligibility is inadequate.

Results of the project are:

  • recommendations for acoustic design of indoor arenas

  • clarification of the responsibilities and emphasizing the need for governing recommendations

  • a proposal for an assembled methologoy concerning attestation of speech intelligibility in voice alarm systems

The target group of the research project is on one hand contractors, designers and purchasers who are active witin the field and on the other hand the authorities who manage and regulate demands, laws, standards, recommendations and responsibilities.


Philip Zalyaletdinov
Matti Sarne
Björn Hellström
Amir Farhadian-Langroudi

Diagnos av cyanidförgiftning vid bränder via analys av utandningsluft

Numerous people die every year from toxic smoke emitted in fires. Carbon monoxide is thought to be the most important individual factor, the contribution of hydrogen cyanide (HCN) probably being severly underestimated. HCN is emitted from many modern materials when they catch fire, including furniture polstered with polyurethane foam. Cyanide poisoning may alise arise from terrorist attacks and in industrial handling of cyanides. Cyanide poisoning is life threatening and antidote treatment has to be initiated rapidly. At present, however, there is no way of rapid diagnosis of cyanide poisining.

The long-term goal of this project, is to develop a rapid method for diagnosis of cyanide poisoning by breath analysis. The project is divided in five steps:

  1. Which HCN levels will appear in breath due to washout from the airways, the HCN emanating from high but short and innoxious peaks of HCN in the ambient air?

  2. What are the background levels of HCN in breath from subjects not exposed to cyanide?

  3. Will HCN in breath increase significantly following systematic intoxication?

  4. Development of a fast, simple and reliable direct-reading detector for HCN in breath.

  5. The relation between HCN in breath and in blood.


Gunnar Johansson