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Water analysis: an objective and cost-effective tool in the fight against drugs

Toxicological tests at RISE Photo: David Lagerlöf

Wastewater analysis can help a community or business track drug use over time and identify areas of unusually high use. It can also help the police detect the influx of new drugs.
– Water analysis can act as a 'health check' for a community, similar to occupational health services. It provides objective results, gives a good overview and also keeps the cost of producing health data down," says Louise Karsson, Head of unit, Bioanalysis and toxicology at RISE.

According to the Swedish National Board of Health, drug use will cost society SEK 44 billion in 2020. The Social Services Act requires municipalities to prevent and combat the abuse of alcohol and other addictive substances, including drugs.  

The Swedish Work Environment Authority has no rules on drug testing at work. However, if the work involves a high risk of accidents, the assessment is that drug testing may be justified in both the public and private sectors.

In order to take preventive measures against drug abuse, or to find out whether a community or workplace has a problem with drug use, it is necessary to have a reliable basis on which to build the measures. Analysis of drugs in wastewater can provide an objective picture of the extent of the problem.

"Water analysis is a cost-effective way of finding out about drug use on a large scale. But it can also be used to see differences between different areas of a city, or even between different departments or buildings in the same workplace," says Louise Karlsson.

Several strengths over individual sampling 

The strengths of water analysis are its objectivity and cost-effectiveness, and the fact that it is possible to follow developments over time.

"Water analysis can provide answers on how to prioritise efforts and resources. It is a very good complement to surveys and other data from the police or health services," says Louise Karlsson.

Unlike personal sampling, which can be perceived as offensive, water analysis also respects personal privacy and anonymises any drug users.  

"If a company or municipal organisation judges that drug use is unlikely to be a major problem in a workplace, for example, it can avoid individual sampling, which could violate privacy," says Louise Karlsson.

A water analysis can provide answers on how to prioritise efforts and resources.

How water analysis works 

Put simply, there are two main methods of analysis. The most common is to set up a panel where laboratory staff look for specific substances in the water and quantify them.

"We normalise the results to amounts per thousand people so that we can compare different times or places. For some drugs, we can also convert the results into a number of doses based on how much is excreted in urine," says Louise Karlsson.  

The second method of analysis is to identify unknown substances in a sample.

"We are developing this, but we already have methods for finding new drugs in samples. An example of this is when we discovered that the new drug 'crystal' had arrived in Sweden. It can be a tool for the police to see routes of entry and distribution. When customs receive a seizure, we can see where the drug is appearing."

Work on water analysis often starts with a municipality contacting RISE, which advises the municipality on how and when to take samples.

"If they have a specific question or want a general overview, we set up a sampling strategy. For example, we can take a 24-hour sample on both a weekday and a weekend for comparison," she says.

"We recommend taking a 24-hour sample at least twice a year, and preferably four times a year. Doing it continuously and spread out allows you to capture seasonal variations as well as other factors such as tourism or student flows.

Large amount of data on pharmaceuticals in wastewater 

RISE has already collected data from municipalities and companies across the country. This makes it easy to see how big the problem is for a particular community compared to an anonymised community of similar size elsewhere in the country.

And while it is one thing to collect the data, it is equally important to explain it.

"We want to explain the results and guide our customers so that they can make the best use of the data," says Louise Karlsson.

"We are an accredited laboratory and work with quality all the time. One of our strengths is the breadth of our expertise. We have toxicologists, chemists and a large department working with AI and computational chemistry. This allows us to bring together teams with specific competences depending on the question." 

OTHER APPLICATIONS FOR WATER ANALYSIS 

Detecting and measuring drug use is not the only application for wastewater analysis. It is also possible to measure the amount of drugs and antibiotics, for example.

"We study pharmaceuticals and their metabolism. When we look for markers, we can use that knowledge. We set up drug panels, but we also analyse the presence of doping substances," says Louise Karlsson.

"We also look at the effectiveness of wastewater treatment plants in removing pharmaceuticals and other chemicals, and we have an antibiotics project.

Another important application is analysing the amount of environmentally hazardous chemicals in the effluent after it has been cleaned by the treatment plant.

"When we do drug analysis, we look at the incoming water to the treatment plant, but the really interesting thing here is how effectively the treatment plant can purify water that contains chemicals that we don't want to be released into our waterways."  

Contact

Curious about how wastewater analysis could benefit your organisation? Send us an email and we'll get back to you! bioanalys@ri.se

Louise Karlsson

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Chemical and biological analysis Sekundär områdes navigation:
Water
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Health and life science

Calibrated Tachographs Contribute to Well Rested and Traffic-Safe Drivers

Tachograph

Trucks and buses must be equipped with tachographs that record speed and driving and rest times. These regulations exist to ensure that drivers are rested and traffic-safe, and to create a level playing field in competition. However, to rely on the tachograph's measurements, calibration is required, and this is where RISE plays an important role.

Tachographs must be inspected and calibrated regularly, which is crucial for ensuring the reliability of the information they provide. Not adhering to these regulations can be costly for both the driver and the transport company. Calibration is carried out by an accredited workshop.

"The workshop uses a so-called tachograph calibrator to perform the calibration. The calibrator pretends to be the truck and generates signals to the tachograph about, for example, distance, speed, and time. By comparing the information in the tachograph with the calibrator, we ensure that the tachograph is accurate," says Omer Alkarkhi, TIC engineer at the National Laboratory for Electrical Quantities.

The calibrator pretends to be the truck and generates signals to the tachograph about, for example, distance, speed, and time

But how do we know that the tachograph calibrator is accurate? To trust measurements, a chain of calibrations is required all the way up to the definition of the unit. Through this traceability chain, we can expect, for instance, a meter to be a meter worldwide, which is a prerequisite for international trade, research, and production.

"This is where we at RISE come in with our new service for calibrating tachograph calibrators. Workshops send their equipment to us, and we calibrate it, primarily concerning time and frequency," says Omer Alkarkhi.

RISE Meets the Need

Previously, a private company offered this service, but now RISE is the go-to for workshops.

"It's easier for us, working in many different adjacent metrological areas, to maintain the necessary expertise. This is an example of RISE's important role when industry and business cannot themselves meet the existing needs," says Maria Hammarquist, research and development engineer.

Closer to the End Customer

Usually, laboratories that perform calibrations for customers turn to the national laboratories at RISE to calibrate their equipment.
"But here, we work closer to the end customer, meeting the workshops that will actually use the equipment, which is very enjoyable," says Omer Alkarkhi.

Omer Alkarkhi

TIC-ingenjör
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Last published: Metrology Sekundär områdes navigation:
Logistics
Automotive and future transport
Risk and security

Support for cleaning PFAS-contaminated firefighting equipment

Name of service (page headline, shown in promos – maximum of 70 characters incl. spaces): Support for cleaning PFAS-contaminated firefighting equipment Lead (include SEO-words and the main benefits for your target groups. Stick to one paragraph, maximum 2-3 sentences):

When transitioning to PFAS-free extinguishing agents, there is a risk that the new, fluorine-free extinguishing agent becomes contaminated due to PFAS remaining in the system. It is therefore important to clean the system before refilling and to ensure adequate cleaning.

Purpose/Benefit:

The transition to fluorine-free (PFAS-free) extinguishing agents is underway in society. In many cases, simply replacing the firefighting foam concentrate is not sufficient; there is a risk that PFAS remaining in the system will contaminate the new extinguishing agent, perpetuating the spread of PFAS. Before refilling with new extinguishing agent, it is important to conduct thorough cleaning and ensure that it successfully removes PFAS from surfaces. Research conducted shows that despite repeated flushing, PFAS continues to persist in the system.

Method (what/which methods are used to perform the service):

RISE has the expertise to provide support for cleaning PFAS-contaminated equipment. In a recently completed research project, we have gained knowledge about cleaning methods. RISE also possesses knowledge about current and upcoming regulatory requirements. We have the capability to provide recommendations for analyses to ensure adequate cleaning and to conduct these PFAS analyses.

Delivery (what does the client get after performed service – e.g. a report, certificate etc.):

Delivery according to request and agreement.

Area: Risk and safety Contact person (Enter one name per field. Activated personal contact pages will appear automatically):
Sixten Dahlbom, Projektledare
Tove Mallin, Enhetschef
Laboratory test
Field measurements: Yes Price type: 1 Division: Division Safety and Transport Preparation: No preparation required Certification and marking: Not applicable Type of service: Testing / Analysis / Evaluation Instrument: Not applicable General area: Not applicable Delivery level: Not applicable
sixten.dahlbom@ri.se
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9. Industry, innovation and infrastructure
Purpose - Header: Cleaning of PFAS-contaminated firefighting equipment. Metod - Header: Analytical services and expertise Delivery - Header: Delivery More information - Header: Mer information
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Fire safety Sekundär områdes navigation:
Risk and security
Chemical and biological analysis
Tjänstetyp tagg: Konsultuppdrag

IoT devices can become security threats – how to manage the risk

Connected home

There are now more connected devices than people on the planet. The Internet of Things (IoT) is an important part of the digitalisation of society. But it also opens new doors for cybercriminals. For manufacturers of smart products, it's a matter of finding and closing the back doors – before the end user is harmed. 

The washing machine that tells you when electricity is cheapest, the industrial robot that tells you when it's time for maintenance, and the security alarm that tells a worried relative where an elderly parent is. IoT is everywhere, making our everyday lives better, easier and cheaper...  

But in reality, the technology is also creating security gaps large and small in our homes, cities, industries, agriculture and transport.

Tomas Bodeklint, Research and Business Developer at RISE and responsible for the institute's Cyber Test Lab test and demonstration environment, explains how an ordinary office printer can be used as a tool for a large-scale hacking attack:

"Cybercriminals scan the Internet for unprotected devices. When they find a connected, unprotected printer, they implement software that allows them to use the printer for purposes other than those for which it was intended. It can become part of a 'botnet', an army of devices that work together to launch denial-of-service attacks. In this case, the infected IoT devices are used to bring down specific servers.

Cost focus leads to limited security thinking

 The Swedish Defence Research Agency, FOI, was commissioned by the Swedish Civil Defence Agency, MSB, to map the risks of IoT. One of the conclusions was that much of the IoT equipment has been designed without security in mind*. Tomas Bodeklint believes there is a simple explanation for this.

"A big part of the problem is that many IoT devices must not cost too much for the end user. Manufacturers focus more on functionality and ensuring that a product does what it is marketed to do, rather than ensuring security. This is an issue that has become more acute as cybercriminals and state-sponsored actors use digitalisation to influence society in different ways," says Bodeklint.  

The threat has been addressed at EU level, with the Radio Equipment Directive and the forthcoming Cyber Resilience Act (CRA) in the Union's toolbox of countermeasures, which together cover all types of products that contain some form of software. The aim is to prevent devices with security vulnerabilities from reaching consumers.

"Manufacturers need to consider cybersecurity at the design stage. It is often difficult to add security features after the fact. A good start is to review the threat landscape for your product and analyse the risks and possible attack vectors. Then you can apply various solutions to prevent them, such as encryption and multifactor authentication," says Tomas Bodeklint.  

Plugging a hole is not enough. Hackers are always finding new ways in.

Disruptions can jeopardise road safety 

RISE helps companies with this type of threat and risk analysis and conducts penetration tests to find weaknesses in IoT products. Among other things, vehicles and charging points have been examined to identify potential security holes. Electromagnetic compatibility (EMC) was also measured. The latter tests whether the electronic product interferes with or is interfered with by other devices and equipment in the vicinity.  

"We have seen it in the past, and we are seeing it now, that the electronics in a car are affected by radio interference. If you haven't thought about EMC issues before, consider the following scenario: your children are in the back seat watching a children's programme on their tablets and suddenly the car crosses the road. Or you're sitting in a traffic jam talking on the phone when the car accelerates into the car in front of you. The more automated the technology in the car, the more complex the risks become," says Tomas Bodeklint.  

"The car is one example of many connected products that have a positioning function. This also increases vulnerability. MSB has identified 'antagonistic electromagnetic threats' to the satellite navigation system as an emerging risk. In the winter of 2023/2024, several jamming incidents were reported in Sweden, with Russia identified as the source." 

"We help the industry with positioning in their products with simulated spoofing and jamming tests - jamming and deceiving the GNSS signals (see box). "This type of testing will of course become increasingly important as we move towards fully automated driving," says Mr Bodeklint.

"It's not enough to plug a hole" 

There have long been requirements for electronic products to be electrically safe to prevent people from being injured. In addition to an overarching legal text, rules and standards have been added to describe how this should be ensured.

"In the future, we will need legal requirements, methods and structures to ensure cybersecurity in all areas. At the same time, we need to raise the level of knowledge. It is not just the engineer building a product who needs to think about security in the design phase, but the whole organisation needs to think about cybersecurity all the time. And plugging a hole is not enough. Hackers are always finding new ways in," says Tomas Bodeklint.  

*Sources: Swedish Defence Research Agency, FOI. https://www.foi.se/nyheter-och-press/nyheter/2018-10-08-sakernas-intern…  
Swedish Civil Defence Agency, MSB. https://rib.msb.se/filer/pdf/29057.pdf https://rib.msb.se/filer/pdf/30061.pdf  

INTERNET OF THINGS - THE TERMS TO KNOW 

The Internet of Things (IoT) is a concept in which physical devices are connected to the Internet and can communicate with each other and send and receive data. By integrating sensors and smart technologies into everyday objects, IoT can enable the automation, monitoring and streamlining of various processes and systems.

Botnets are like an army of computers, phones or other devices that have been hacked or infected with malware without their owners' knowledge. These devices can be controlled by an attacker to spread viruses, send spam or launch attacks against websites or other computers.  

GNSS, Global Navigation Satellite System, is a collective term for satellite-based navigation and positioning systems. The best known of these is the GPS system.  

Spoofing is a type of attack in which an attacker creates false signals to trick recipients into believing they come from a legitimate source. This can be used to disrupt navigation devices or to mislead people or systems.

Jamming is an attack in which an attacker sends jamming signals to overload or disrupt communication between the sender and receiver. For example, a jamming attack can be directed at a GNSS receiver to block or distort signals from the satellites. 

Tomas Bodeklint

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Cybersecurity Sekundär områdes navigation:
EMC
Digital infrastructure
Risk and security

Driver support for vehicle interaction in mining environments

NAVIMINE Interaction
navimine

In this project, a solution for a digital driver support system facilitating vehicle interaction underground will be developed. This system will be integrated with a positioning system for underground mines and evaluated by users in a pilot study in a mining environment.

Projektledare
Completed
Work environment Design Mobility Mobility services
Region Norrbotten
6 månader
827 000 SEK
Division: Division Digital Systems and Societal Transformation
3. Good health and well-being
9. Industry, innovation and infrastructure
12. Responsible consumption and production
Projekt logo: navimine Project end date: Sekundär områdes navigation:
Sensors and sensor systems
Digitalisation
Risk and security

Clarified type-approval for chipboard shutters

fibreglass shutters

According to the Planning and Building Act, a construction product may be included in a building only if the product is suitable for its intended use. A type-approved product is verified to fulfil the requirements of the building regulations. Today, prefabricated underlayment shutters are one of the most common underlayments in roofing and there is a type approval for them. Now the type approval has been updated and clarified with a new rule for certification.

Roofing with rafters provides a stable base for roofing with roofing felt, tiles and sheet metal. The use of prefabricated underlayment shutters allows for faster roofing. The unprotected roof surface and building are exposed to climate and external influences for a shorter time, reducing the risk of future problems in the finished building. Prefabricated underlay shutters produced in a controlled production environment provide the conditions for consistently high quality.

A type approval for the manufacture of underlayment shutters allows you to demonstrate that the product has been manufactured under controlled conditions and fulfils the requirements for its intended use, giving you a competitive advantage. The certification rule for a product describes the certification process when applying for a type approval, the requirements, checks and labelling to be done for the product. To minimise the risk of different interpretations, the certification rule for the type approval of underlay shutters was updated in September 2023.

Type approval of manufactured products is done by an authorised independent party. Boverket has appointed RISE as a competent organisation to issue type approval for construction products and accredited by Swedac for it. Type approval of underlay shutters is unique in the market and RISE is the only organisation that can issue type approval, perform accredited inspection and offer accredited testing of all the properties included in the certification rule for underlay shutters. 

RISE develops certification rules for type approvals and certifies product type approvals.

When RISE develops new rules for type approval, we start from the rules and regulations developed by authorities, in this case the Swedish National Board of Housing, Building and Planning, and RISE's long experience of testing and type approval of products in the field. When you then hire RISE to issue a type approval for your product, you can be sure that an issued type approval maintains a high level and that the type-approved products meet the requirements of the building regulations. Type approval is carried out according to the certification rule through testing and review that ensures that materials, function and documentation have the conditions to fulfil, such as for underlayment shutters, applicable requirements for durability, moisture and roof safety.

This is an article from our magazine Trävärden, view it here! (Link)

Robert Jarnell

TIC-ingenjör
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Wood technology Sekundär områdes navigation:
Metrology
Risk and security

Checks on charging points ensure safe infrastructure

Charging station

Charging points are still not regulated in the same way as petrol and diesel pumps. As a result, the charging infrastructure is not subject to any inspection requirements, which could mean that hidden safety risks remain undetected and consumer protection is compromised. Independent verification can help charging station operators demonstrate that their stations are working properly and charging customers correctly.  

By 2030, almost all new cars on the road could be electric. This is according to scenarios developed by advocacy organisation Power Circle as part of the energy research project 'An Electricity System for Electric Vehicles'. But for a fully electrified vehicle fleet to be feasible, the infrastructure - the network of charging stations from north to south - is of course crucial. At the end of 2023, there will be about 34,400 public charging points in Sweden, spread over about 4,700 charging stations.  

"I think most consumers take it for granted that these charging points are controlled in a similar way to petrol and diesel stations, that they are safe and that you get what you pay for. But charging stations are not yet regulated in detail," says Anders Nilsson, Senior Business Developer in Electrification and Reliability at RISE.  

"Ensuring reliable infrastructure" 

Deployment has been slow, and the regulatory framework has not kept pace. It takes time to revise international guidelines. While waiting for comprehensive EU requirements on how charging stations should be regulated, some countries have opted to develop national guidelines. In practice, this can create technical barriers to trade as regulations differ in different markets and create a complex situation for industry players, says Anders Nilsson.

Manufacturers have also recognised the need to have the electricity meter module in the charging station tested by an independent certification body. "There is a clear regulatory framework for electricity meters, the Measuring Instruments Directive (MID), but it does not yet specifically cover charging stations.

However, despite the lack of regulation, it is already possible to test entire charging stations. This is what RISE engineers do when they go out to existing charging stations and carry out checks. Using calibrated measuring equipment, they can see whether the charging station is delivering the energy for which the customer is being charged.  

"Checking the stations ensures a reliable infrastructure. Of course, operators are also interested in ensuring that everything is in order. "This can be a selling point to the market: when you charge with us, you get what you pay for because RISE has checked it," says Anders Nilsson. 

I think most consumers take it for granted that these charging stations are checked

Can have a negative impact on trust

During the inspection, engineers also check that cables and plugs are in good condition and meet electrical safety requirements.  

"There have not yet been any incidents related to charging stations in Sweden, but it only takes one injury to make headlines. Once an accident happens, it could affect confidence in the charging infrastructure, which in turn could slow down electrification," says Anders Nilsson and continues:  

"The stations are relatively new now, but over time the cables will wear out. Someone will forget to unplug and drive away, as has happened with petrol stations. So when we go out to measure, we also want to see how the equipment looks. The inspection is as much about consumer protection as it is about safety."

RISE maintains a close dialogue with Swedac, the Swedish regulatory authority for regulated measurement technology, to follow developments in the implementation of charging stations in the EU's Measuring Instruments Directive (MID). As RISE is already testing new products under development and existing products in the field, Anders Nilsson can announce that the team will be ready when new comprehensive regulations are introduced.  

Electromobility Sekundär områdes navigation:
Energy transmission
Metrology
Risk and security

Basic electrical safety course for those working near electricity

Electrical safety

How can we prevent electrical accidents from happening? You will learn this in this two-hour e-learning course. The target audience is people who work near electricity and/or have health and safety responsibilities. 

There are one or two electricity-related fatalities in Sweden every year. This course aims to keep these numbers down and reduce the risks. In two hours, you will learn the basics of electrical safety: we will cover different types of electrical hazards, the effects of electricity and common causes of electrical accidents. You will learn how to work safely with electricity and about roles and responsibilities in this work. 

Target group

The course is designed for two target groups. Firstly, for those who work near electricity and risk being exposed to electrical hazards, and secondly, for those who have work environment responsibilities and need to manage electrical safety risks in their work. The course is at a basic level. 

Pratical information

This course is in the form of an e-learning. Instructional films are interspersed with practical exercises. It will take you about two hours to complete the course. The course is located on the RISE learning platform Learnifier, which you get access to when you sign up.

Sign up for the course

Register for the course by clicking on this link. This will take you to a registration form. Once you have completed your registration, you will have access to the course on Learnifier.

The course costs 1900 SEK. The licence lasts for a full year.

Charlotta Uddh

Projektledare
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Division: Division Safety and Transport

Charlotta Uddh

Electrical safety expert and team leader, RISE

Charlotta Uddh is responsible for this course. She has a background in product safety for vehicles and electrical safety and has long worked with coordinating and leading the work for better safety cultures and safer products. 

The course contains the following parts:

  • Introduction to electrical safety
  • Different types of electrical hazards and the effects of electricity
  • How to work safely with electricity
  • Exercise: When does the standard apply?
  • Organisation - role descriptions
  • Exercise: Roles and responsibilities
  • Exercise: Managing risks
     

Carbon dioxide fire fighting experimental evaluation

COFFEE

Electrification of transport sector has a strong momentum with rapidly growing quantity of Electric Vehicles (EV) being transported in marine vehicle carriers between the continents and near the coasts. This project aims to ensure a safe transportation of Lithium-Ion Battery (LIB) driven vehicles in cargo spaces of marine vehicle carriers.

Coordinator
Completed
Maritime
2,5 years
4 200 000 SEK
Division: Division Safety and Transport
Final webinar where the project results are presented (in English)

Specifically, this project will study if traditional low-pressure carbon dioxide fire suppression systems are adequate for supressing battery fires in cargo spaces of vehicle carriers. To achieve this goal, this project will involve approaches including (i) literature study, (ii) battery cell-level experiments (iii) small- and large-scale carbon dioxide fire suppression experiments, (iv) multi-physics simulations and (v) reference group meetings and open webinar and co-author of peer-reviewed articles.

In the short term, this project will lead to increased knowledge of lithium-ion battery fires and mitigation strategies at sea. This project will deliver fact-based evaluation about effectiveness of carbon dioxide fire suppression systems for ship owners, crew, battery and vehicle producers, fire protection system suppliers, marine insurance companies, and so on.

In the long term, this project will lead to increased safety of marine vehicle carriers transporting lithium-ion battery driven vehicles and assist in achieving climate goals globally.
The project will be led and carried out by RISE with in-kind support from the industrial partners in forms of donation of battery cells, modules and packs and vehicles for tests and work hours for participation in project meetings and review of report and articles. Moreover, bilateral dialogue with stakeholders will be conducted in this project in forms of regular reference group meetings, open workshops, and co-authoring peer-reviewed articles.

The project result will give input to International maritime Organization (IMO) for harmonization of gas-extinguishing systems in cargo spaces on vehicle carriers.

Publications within the project: 

Anna Karlsson

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Funders without URL:
Swedish Transport Administration
Stiftelsen Sveriges Sjömanshus
Project end date: Fire safety Sekundär områdes navigation:
Energy storage
Mobility
Maritime
Risk and security

DAS for vibration monitoring and passive seismic exploration of rock

DAS passive seismic

The present project is a feasibility test that focuses on the exploration and characterization of the mining site of Malmberget via an acoustic technique based on optical fibers (Distributed Acoustic Sensing, DAS). It is a unique opportunity to evaluate fiber optic sensing in parallel to traditional seismic acquisitions performed by LKAB.

Participant
Active
Fibre optics and photonics Production and manufacturing
3 years
3.5 Msek
Division: Division Digital Systems and Societal Transformation

Monitoring by passive acoustic vibrations, generated by the moving infrastructure or mining works, is a powerful method for extensively imaging the rock quality. Passive acquisition, where the underground excavation activities act as a source of acoustic energy, enables investigation of the deeper portion of the rock volume. 

Optical fibers have several advantages as they are low cost, small and lightweight, robust to high temperatures, immune to electromagnetic interference, versatile, and in addition have a low environmental impact. They are therefore a suitable sensing solution for the demanding underground environment. 

The DAS technology allows for continuous monitoring of large areas, up to several kilometers in range, with a dense spatial sampling (1-10 m) along the fiber (corresponding to one geophone every 1-10 meter). The system is capable of measuring vibrations ranging from a few millihertz to tens of kilohertz using a single optical fiber and requires access to only one end of the fiber. In addition, the active elements of the sensor, e.g., the electronic readout system and the data processing unit, can be placed kilometers away from the designated sensing area, increasing the safety of the sensor operators and guaranteeing long-term monitoring since the sensing probe can be permanently installed in the area of interest. 

In this scenario, the advantages of DAS technology compared to traditional seismic sensors are the higher spatial resolution and the capability to provide several measurement points in a single and totally passive optical fiber that works simultaneously as sensing probe and data transmission cable. Such features enable less complex installation of acoustic monitoring in complex environments, such as in boreholes or along tunnels, and will most likely improve the ability of 3D characterization of the rock volume.

The same techniques, developed and fine-tuned in the present project, could also be applied during the excavation of underground infrastructures in urban environments, where the geological model can be updated while the excavation face moves forward.  

Kenny Hey Tow

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12. Responsible consumption and production
Project end date: Fiber optics and photonics Sekundär områdes navigation:
Metrology
Sensors and sensor systems
Risk and security