Abstract: A method, system and apparatus for determining the state of a muscle between a normal non-tired state, a tired state and a passive involuntary tension state. A signal from the muscle is recorded at rest by using an electrode arrangement, where an earth body may prevent the electrodes from picking up signals beyond the extent of the earth body. The frequency content of the signal is determined by spectral analysis, e.g. by computing a moment of the spectrum. A normal frequency content indicates a non-tired muscle state, whereas a low and a high frequency content indicate a tired and a passive involuntary tension muscle state.
Type:
Grant
Filed:
October 28, 2011
Date of Patent:
July 23, 2019
Assignee:
FIBRUX OY
Inventors:
Mika Herrala, Pasi Tavi, Jani Mäntyjärvi, Mikko Vähäsöyrinki
Abstract: A device or a system for measuring muscle signals. A system may include at least one processor, memory including computer program code, the memory and the computer program code configured to, with the at least one processor, cause the system to perform at least the following: measure a signal from a muscle to obtain a muscle activation signal; carry out at least one transform on the muscle activation signal to obtain a muscle activation spectrum; and determine a muscle state indicator from the muscle activation spectrum by using signal characteristics from a first and a second band of the muscle activation spectrum.
Type:
Grant
Filed:
June 22, 2015
Date of Patent:
April 2, 2019
Assignee:
FIBRUX OY
Inventors:
Mika Herrala, Markku Vimpari, Pasi Tavi, Juha Lampela
Abstract: In order to determine the state of a muscle between a normal non-tired state, a tired state and a passive involuntary tension state, a signal from the muscle is recorded at rest by using an electrode arrangement, where an earth body may prevent the electrodes from picking up signals beyond the extent of the earth body. The frequency content of the signal is determined by spectral analysis, e.g. by computing a moment of the spectrum. A normal frequency content indicates a non-tired muscle state, whereas a low and a high frequency content indicate a tired and a passive involuntary tension muscle state. A mapping is used to improve accuracy of state determination, e.g. with a reference database.
Type:
Grant
Filed:
April 23, 2013
Date of Patent:
December 19, 2017
Assignee:
FIBRUX OY
Inventors:
Mika Herrala, Pasi Tavi, Jani Mantyjarvi, Mikko Vahasoyrinki