miun.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Andersson, Henrik, DrORCID iD iconorcid.org/0000-0003-2965-0288
Alternative names
Publications (10 of 69) Show all publications
Engholm, M., Hammarling, K., Andersson, H., Sandberg, M. & Nilsson, H.-E. (2019). A Bio-Compatible Fiber Optic pH Sensor Based on a Thin Core Interferometric Technique. Photonics, 6(1), Article ID 11.
Open this publication in new window or tab >>A Bio-Compatible Fiber Optic pH Sensor Based on a Thin Core Interferometric Technique
Show others...
2019 (English)In: Photonics, ISSN 2304-6732, Vol. 6, no 1, article id 11Article in journal (Refereed) Published
Abstract [en]

There is an increasing demand for compact, reliable and versatile sensor concepts for pH-level monitoring within several industrial, chemical as well as bio-medical applications. Many pHsensors concepts have been proposed, however, there is still a need for improved sensor solutionswith respect to reliability, durability and miniaturization but also for multiparameter sensing. Here wepresent a conceptual verification, which includes theoretical simulations as well as experimentalevaluation of a fiber optic pH-sensor based on a bio-compatible pH sensitive material not previouslyused in this context. The fiber optic sensor is based on a Mach-Zehnder interferometric technique,where the pH sensitive material is coated on a short, typically 20-25 mm thin core fiber splicedbetween two standard single mode fibers. The working principle of the sensor is simulated by usingCOMSOL Multiphysics. The simulations are used as a guideline for the construction of the sensorsthat have been experimentally evaluated in different liquids with pH ranging from 1.95 to 11.89. The results are promising, showing the potential for the development of bio-compatible fiber optic pH sensor with short response time, high sensitivity and broad measurement range. The developedsensor concept can find future use in many medical- or bio-chemical applications as well as inenvironmental monitoring of large areas. Challenges encountered during the sensor developmentdue to variation in the design parameters are discussed.

Keywords
interferometric, Mach-Zehnder, pH, sensor, hydrogel, simulation
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-35646 (URN)10.3390/photonics6010011 (DOI)000464341200003 ()2-s2.0-85063143389 (Scopus ID)
Note

MDPI Photonics Special Issue "Advanced Optical Materials and Devices"

Available from: 2019-02-14 Created: 2019-02-14 Last updated: 2019-05-22Bibliographically approved
Ahmad, J., Li, X., Sidén, J. & Andersson, H. (2019). An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane. In: FLEPS 2019 - IEEE International Conference on Flexible and Printable Sensors and Systems, Proceedings: . Paper presented at IEEE Fleps 2019, IEEE International Conference on Flexible and Printable Sensors and Systems, Glasgow, Scotland, July 7-10, 2019. , Article ID 8792266.
Open this publication in new window or tab >>An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane
2019 (English)In: FLEPS 2019 - IEEE International Conference on Flexible and Printable Sensors and Systems, Proceedings, 2019, article id 8792266Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-36146 (URN)10.1109/FLEPS.2019.8792266 (DOI)2-s2.0-85071395576 (Scopus ID)978-1-5386-9304-9 (ISBN)
Conference
IEEE Fleps 2019, IEEE International Conference on Flexible and Printable Sensors and Systems, Glasgow, Scotland, July 7-10, 2019
Projects
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Available from: 2019-05-15 Created: 2019-05-15 Last updated: 2019-09-19Bibliographically approved
Ahmad, J., Li, X., Sidén, J. & Andersson, H. (2019). An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane.
Open this publication in new window or tab >>An Analysis of Screen-Printed Stretchable Conductive Tracks on Thermoplastic Polyurethane
2019 (English)Data set, Primary data
Abstract [en]

The table is a result from cyclic strain test with 25 % and 50 % elongations of screen-printed stretchable conductive tracks on thermoplastic polyurethane.

Keywords
Elongation test
National Category
Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-36193 (URN)
Available from: 2019-05-23 Created: 2019-05-23 Last updated: 2019-09-19Bibliographically approved
Olsen, M., Zhang, R., Örtegren, J., Andersson, H., Yang, Y. & Olin, H. (2019). Frequency and voltage response of a wind-driven fluttering triboelectric nanogenerator. Scientific Reports, 9(1), Article ID 5543.
Open this publication in new window or tab >>Frequency and voltage response of a wind-driven fluttering triboelectric nanogenerator
Show others...
2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, no 1, article id 5543Article in journal (Refereed) Published
Abstract [en]

Triboelectric nanogenerators (TENG:s) are used as efficient energy transducers in energy harvesting converting mechanical energy into electrical energy. Wind is an abundant source of mechanical energy but how should a good triboelectric wind harvester be designed? We have built and studied a TENG driven by air flow in a table-top sized wind tunnel. Our TENG constitutes of a plastic film of size10 cm × 2 cm which is fluttering between two copper electrodes generating enough power to light up a battery of LED:s. We measured the voltage and frequency of fluttering at different wind speeds from zero up to 8 m/s for three electrode distances 6 mm, 10 mm and 14 mm. We found that the frequency increases linearly with the wind speed with a cutoff at some low speed. Power was generated already at 1.6 m/s. We seem to be able to explain the observed frequency dependence on wind speed by assuming excitation of the film into different harmonics in response to von Kármán vortices. We also find that the voltage increase linearly with frequency. We anticipate that TENG:s of this design could be useful both as generators and speed sensors because they work at low air speeds.

National Category
Natural Sciences Engineering and Technology
Identifiers
urn:nbn:se:miun:diva-35936 (URN)10.1038/s41598-019-42128-7 (DOI)000463178500004 ()30944397 (PubMedID)2-s2.0-85063884794 (Scopus ID)
Funder
J. Gust. Richert stiftelseSwedish Energy AgencyKnowledge FoundationEuropean Regional Development Fund (ERDF)
Note

Forskningsfinansiär: Länsstyrelsen Västernorrland

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-07-08Bibliographically approved
Zhang, R., Hummelgård, M., Örtegren, J., Olsen, M., Andersson, H. & Olin, H. (2019). Interaction of the human body with triboelectric nanogenerators. Nano Energy, 57, 279-292
Open this publication in new window or tab >>Interaction of the human body with triboelectric nanogenerators
Show others...
2019 (English)In: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 57, p. 279-292Article in journal (Refereed) Published
Abstract [en]

The use of triboelectric nanogenerators (TENGs) is a new technique for energy harvesting at both small and large scales. Almost all types of mechanical energy can be harvested with TENGs by using four modes of operation that cover almost all mechanical motions. The interactions of the human body with TENGs range from energy harvesting, motion sensing, and biomedical applications to human-computer communications. Different types of TENGs have been developed to directly or indirectly involve the human body. This review will summarize the recent advances in the interaction of the human body with TENGs.

Keywords
Energy harvesting, Healthcare, Human body, Human-robot interactions, Sensors, Triboelectric nanogenerators
National Category
Other Physics Topics
Identifiers
urn:nbn:se:miun:diva-35386 (URN)10.1016/j.nanoen.2018.12.059 (DOI)000458419000028 ()2-s2.0-85059038089 (Scopus ID)
Available from: 2019-01-06 Created: 2019-01-06 Last updated: 2019-03-18Bibliographically approved
Andersson, H., Šuly, P., Thungström, G., Engholm, M., Zhang, R., Mašlík, J. & Olin, H. (2019). PEDOT: PSS thermoelectric generators printed on paper substrates. Journal of Low Power Electronics and Applications, 9(2)
Open this publication in new window or tab >>PEDOT: PSS thermoelectric generators printed on paper substrates
Show others...
2019 (English)In: Journal of Low Power Electronics and Applications, ISSN 2079-9268, Vol. 9, no 2Article in journal (Refereed) Published
Abstract [en]

Flexible electronics is a field gathering a growing interest among researchers and companies with widely varying applications, such as organic light emitting diodes, transistors as well as many different sensors. If the circuit should be portable or off-grid, the power sources available are batteries, supercapacitors or some type of power generator. Thermoelectric generators produce electrical energy by the diffusion of charge carriers in response to heat flux caused by a temperature gradient between junctions of dissimilar materials. As wearables, flexible electronics and intelligent packaging applications increase, there is a need for low-cost, recyclable and printable power sources. For such applications, printed thermoelectric generators (TEGs) are an interesting power source, which can also be combined with printable energy storage, such as supercapacitors. Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), or PEDOT:PSS, is a conductive polymer that has gathered interest as a thermoelectric material. Plastic substrates are commonly used for printed electronics, but an interesting and emerging alternative is to use paper. In this article, a printed thermoelectric generator consisting of PEDOT:PSS and silver inks was printed on two common types of paper substrates, which could be used to power electronic circuits on paper. 

Keywords
Paper substrates, PEDOT:PSS, Seebeck coefficient, Stencil print, Thermoelectric generator
Identifiers
urn:nbn:se:miun:diva-36667 (URN)10.3390/jlpea9020014 (DOI)2-s2.0-85065493304 (Scopus ID)
Available from: 2019-07-09 Created: 2019-07-09 Last updated: 2019-07-09Bibliographically approved
Ahmad, J., Andersson, H. & Sidén, J. (2019). Screen Printed Piezoresistive Sensors for Monitoring Pressure Distribution in Wheelchair. IEEE Sensors Journal, 19(6), 2055-2063
Open this publication in new window or tab >>Screen Printed Piezoresistive Sensors for Monitoring Pressure Distribution in Wheelchair
2019 (English)In: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 19, no 6, p. 2055-2063Article in journal (Refereed) Published
Abstract [en]

Prolonged sitting inadequacies cause pressure ulcer to many individuals, especially to disadvantaged with reduced mobility. The measurement of distributed pressure and detection of irregular sitting postures is essential for preventing the risk of developing pressure ulcer. In this paper, a pressure sensing system capable of recognizing sitting postures by means of measuring interface pressure through printed pressure sensors is presented. A thin and flexible large area sensor is screen-printed using silver flake and carbon particle inks and comprises 16 sensing elements. For the evaluation of practical usability, the sensor characterization is carried out by conducting stability, repeatability, drift and bending tests. The performance of the sensor is checked under varying environmental conditions. Sitting posture detection accuracy above 80 % is achieved using a classification algorithm for four different sitting postures. Pressure distribution is monitored at a scanning rate of 10 Hz. A low power and small form factor of read-out electronics enables a compact packaging inside the seat cushion. The presented sensor design targets smart wheelchairs, but it is extendable to much larger areas, for example to be used in beds. The proposed sensing system would be of a great assistance for caregivers and health professionals.

Place, publisher, year, edition, pages
IEEE, 2019
Keywords
Pressure sensors, wheelchair, conductive inks, sitting posture recognition, pressure mapping, screen-printing
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-35133 (URN)10.1109/JSEN.2018.2885638 (DOI)000459513100009 ()2-s2.0-85058158693 (Scopus ID)
Projects
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Available from: 2018-12-10 Created: 2018-12-10 Last updated: 2019-10-16Bibliographically approved
Zhang, R., Hummelgård, M., Örtegren, J., Yang, Y., Andersson, H., Balliu, E., . . . Olin, H. (2019). Sensing body motions based on charges generated on the body. Nano Energy, 63, Article ID 103842.
Open this publication in new window or tab >>Sensing body motions based on charges generated on the body
Show others...
2019 (English)In: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 63, article id 103842Article in journal (Refereed) Published
Abstract [en]

The sensing of body motions is of great importance in areas such as healthcare, rehabilitation, and human-computer interactions. Different methods have been developed based on visual or electrical signals. However, such signals are acquired by external devices and are not intrinsic signals that are created on the body. Here, we report a new universal body motion sensor (UBS) to detect motions based on the intrinsic contact electrification (CE) of the skin or electrical induction (EI) of the body. The CE or EI generates charges on the body, leading to potential differences between the body and ground that can be measured to identify different body motions, such as motions of the head, arms, fingers, waist, legs, feet and toes. Proof-of-concept experiments have demonstrated that the UBS can be used to monitor the conditions of people with Parkinson's disease (PD) and to quantitatively monitor the recovery of those with a leg injury, suggesting great potential for healthcare applications.

Keywords
Body motions, Sensors, Charges, Contact electrification, Electrical induction, Healthcare
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-36826 (URN)10.1016/j.nanoen.2019.06.038 (DOI)000480422400034 ()2-s2.0-85068234493 (Scopus ID)
Available from: 2019-08-12 Created: 2019-08-12 Last updated: 2019-10-16Bibliographically approved
Li, X., Sidén, J., Andersson, H. & Schön, T. (2018). A Paper-Based Screen Printed HF RFID Reader Antenna System. IEEE Journal of Radio Frequency Identification, 2(3), 118-126
Open this publication in new window or tab >>A Paper-Based Screen Printed HF RFID Reader Antenna System
2018 (English)In: IEEE Journal of Radio Frequency Identification, ISSN 2469-729X, Vol. 2, no 3, p. 118-126Article in journal (Refereed) Published
Abstract [en]

Screen printing is a stencil process where conductive inks are patterned onto substrates through a fine mesh of threads. Nowadays, screen printing can be used to print RFID antenna structures onto flexible and ultra-low-cost substrates such as pa-per. In this manuscript, we present an HF RFID reader antenna system, operating at 13.56 MHz, using screen printed Ag particle ink as conductor and using HP photo paper as substrate. The proposed antenna system comprises four loop antenna elements, matched to 50 Ω, and one I2C addressed SP4T multiplexer circuitry, controlled through an exterior embedded system. The geometries, designs and characterizations of the antenna system are described in the manuscript in details. Measurement results show that the antenna system has low power reflections and a suitable Q factor. It has a maximum 11.1 cm RFID tag read range at an antenna system input power of 33 dBm. 2D RFID tag positioning can be enabled by utilizing the RFID tag interrogation zones formed by the four loop antenna elements. In addition, a parametric study is carried out to investigate the effect of loop antenna element DC resistance on the antenna element performance. It can be concluded that the proposed method can be used to create low-cost and large-area HF RFID reader antenna systems.

Place, publisher, year, edition, pages
445 Hoes Lane Piscataway, NJ 08854, USA: IEEE, 2018
Keywords
HF reader antenna system, 13.56 MHz, screen printed, paper substrate
National Category
Paper, Pulp and Fiber Technology Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-34384 (URN)10.1109/JRFID.2018.2869494 (DOI)
Projects
IDPOS
Available from: 2018-09-12 Created: 2018-09-12 Last updated: 2018-10-12Bibliographically approved
Hammarling, K., Engholm, M., Andersson, H., Sandberg, M. & Nilsson, H.-E. (2018). Broad-Range Hydrogel-Based pH Sensor with Capacitive Readout Manufactured on a Flexible Substrate. Chemosensors, 6(3), Article ID 30.
Open this publication in new window or tab >>Broad-Range Hydrogel-Based pH Sensor with Capacitive Readout Manufactured on a Flexible Substrate
Show others...
2018 (English)In: Chemosensors, ISSN 2227-9040, Vol. 6, no 3, p. 15article id 30Article in journal (Refereed) Published
Abstract [en]

Environmental monitoring of land, water and air, is an area receiving greater attention because of human health and safety concerns. Monitoring the type of pollution and concentration levels is vital, so that appropriate contingency plans can be determined. To effectively monitor the environment, there is a need for new sensors and sensor systems that suits these type of measurements. However, the diversity of sensors suitable for low, battery powered- and large area sensor systems are limited. We have manufactured and characterized a flexible pH sensor using laser processing and blade coating techniques that is able to measure pH between 2.94 and 11.80. The sensor consists of an interdigital capacitance with a pH sensitive hydrogel coating. Thin sensors can reach 95% of their final value value within 3 min, and are stable after 4 min. Good repeatability was achieved in regard to cycling of the sensor with different pH and multiple measurements from dry state. We have also studied the relation between an interdigital capacitance penetration depth and hydrogels expansion. We believe that our passive sensor is suitable to be used in low power and large area sensor networks.

Place, publisher, year, edition, pages
Basel, Switzerland: MDPI, 2018. p. 15
Keywords
interdigital, hydrogel, penetration depth, pH, sensor, coating, thin film, laser ablation, oligo (β-amino esters)
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-34203 (URN)10.3390/chemosensors6030030 (DOI)000448395400006 ()2-s2.0-85052627188 (Scopus ID)
Available from: 2018-07-25 Created: 2018-07-25 Last updated: 2019-05-09Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-2965-0288

Search in DiVA

Show all publications