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Design and Realization of an Electromagnetic Guiding System for Blind Running Athletes.

Pieralisi M, Petrini V, Di Mattia V, Manfredi G, De Leo A, Scalise L, Russo P, Cerri G - Sensors (Basel) (2015)

Bottom Line: An example is represented by blind runners who need to be physically linked to a sighted guide by means of non-stretchable tethers during races; with consequent limitations in terms of performance and independence.The system consists of: (1) a mobile unit, which is placed before the runner and generates two "electromagnetic walls" delimiting the way; (2) a receiving unit (worn by the athlete) that provides vibro-tactile warnings every time the user is going outside the safe area so as to encourage him to move toward the central position.The feasibility and the utility of the system proposed are demonstrated by means of tests carried out thanks to the collaboration of a blind volunteer.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, Università Politecnica delle Marche, via Brecce Bianche, Ancona 60131, Italy. marco.pieralisi@univpm.it.

ABSTRACT
Nowadays the technologies aimed at improving the quality of life of people affected by visual diseases are quite common; e.g., devices to support walking or reading. Surprisingly, there is a lack of innovative technologies aimed at helping visually impaired athletes during physical activities. An example is represented by blind runners who need to be physically linked to a sighted guide by means of non-stretchable tethers during races; with consequent limitations in terms of performance and independence. This paper wants to investigate the possibility of realizing a system able to guide blind runners along a complex path, paving the way for the realization of an innovative device designed to improve their independence during training or competitions. The system consists of: (1) a mobile unit, which is placed before the runner and generates two "electromagnetic walls" delimiting the way; (2) a receiving unit (worn by the athlete) that provides vibro-tactile warnings every time the user is going outside the safe area so as to encourage him to move toward the central position. The feasibility and the utility of the system proposed are demonstrated by means of tests carried out thanks to the collaboration of a blind volunteer.

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Reflection coefficient of the transmitting antenna: a comparison between calculated and measured values.
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sensors-15-16466-f007: Reflection coefficient of the transmitting antenna: a comparison between calculated and measured values.

Mentions: Figure 7 depicts a comparison between the simulated and measured values of the reflection coefficient, both refer to the final antenna model including the screws but without tuning. According to the working frequency of the power emitter, the attention has been focused on the peaks of resonance closer to 10 GHz. It is clear how although there is a slightly difference between measured and numerical reflection coefficients, the realized antenna performs a better impedance matching. It exhibits a bandwidth in the range 10.4–10.8 GHz, with a very good resonance (S11 about −30 dB) at about 10.47 GHz. The shift of about 150 MHz with respect to the simulated one (about 10.30 GHz) is probably due to mechanical tolerances and to the non-idealities of the material used to realize the antenna (not taken into account during the EM simulation).


Design and Realization of an Electromagnetic Guiding System for Blind Running Athletes.

Pieralisi M, Petrini V, Di Mattia V, Manfredi G, De Leo A, Scalise L, Russo P, Cerri G - Sensors (Basel) (2015)

Reflection coefficient of the transmitting antenna: a comparison between calculated and measured values.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541888&req=5

sensors-15-16466-f007: Reflection coefficient of the transmitting antenna: a comparison between calculated and measured values.
Mentions: Figure 7 depicts a comparison between the simulated and measured values of the reflection coefficient, both refer to the final antenna model including the screws but without tuning. According to the working frequency of the power emitter, the attention has been focused on the peaks of resonance closer to 10 GHz. It is clear how although there is a slightly difference between measured and numerical reflection coefficients, the realized antenna performs a better impedance matching. It exhibits a bandwidth in the range 10.4–10.8 GHz, with a very good resonance (S11 about −30 dB) at about 10.47 GHz. The shift of about 150 MHz with respect to the simulated one (about 10.30 GHz) is probably due to mechanical tolerances and to the non-idealities of the material used to realize the antenna (not taken into account during the EM simulation).

Bottom Line: An example is represented by blind runners who need to be physically linked to a sighted guide by means of non-stretchable tethers during races; with consequent limitations in terms of performance and independence.The system consists of: (1) a mobile unit, which is placed before the runner and generates two "electromagnetic walls" delimiting the way; (2) a receiving unit (worn by the athlete) that provides vibro-tactile warnings every time the user is going outside the safe area so as to encourage him to move toward the central position.The feasibility and the utility of the system proposed are demonstrated by means of tests carried out thanks to the collaboration of a blind volunteer.

View Article: PubMed Central - PubMed

Affiliation: Department of Information Engineering, Università Politecnica delle Marche, via Brecce Bianche, Ancona 60131, Italy. marco.pieralisi@univpm.it.

ABSTRACT
Nowadays the technologies aimed at improving the quality of life of people affected by visual diseases are quite common; e.g., devices to support walking or reading. Surprisingly, there is a lack of innovative technologies aimed at helping visually impaired athletes during physical activities. An example is represented by blind runners who need to be physically linked to a sighted guide by means of non-stretchable tethers during races; with consequent limitations in terms of performance and independence. This paper wants to investigate the possibility of realizing a system able to guide blind runners along a complex path, paving the way for the realization of an innovative device designed to improve their independence during training or competitions. The system consists of: (1) a mobile unit, which is placed before the runner and generates two "electromagnetic walls" delimiting the way; (2) a receiving unit (worn by the athlete) that provides vibro-tactile warnings every time the user is going outside the safe area so as to encourage him to move toward the central position. The feasibility and the utility of the system proposed are demonstrated by means of tests carried out thanks to the collaboration of a blind volunteer.

Show MeSH