Motor function analyzing apparatus
It is an object of the present invention to provide a motor function analyzing apparatus which simplifies a calibration measurement necessary before measuring a finger tapping motion, and which is capable of evaluating a motor function highly precisely. The present invention provides a motor function analyzing apparatus which simplifies a calibration measurement necessary before measuring a finger tapping motion, and which is capable of evaluating a motor function highly precisely by using a calibration point unique to each apparatus and a calibration point unique to each subject.
1. A motor function analyzing apparatus comprising:
a movement-waveform generating unit which includes:
a magnetic field generator that generates a magnetic field, and a magnetic field detector that detects the magnetic field,
where each of the magnetic field generator and the magnetic field detector is respectively attached to one of two predetermined parts of a biological object, and a distance between the two predetermined parts changes with motion of the biological object, and
where the movement-waveform generating unit generates a movement waveform based on magnetic field data detected by the magnetic field detector, and
the movement-waveform generating unit further includes:
a calibration-point measuring unit that measures calibration points corresponding to the distance between the two predetermined parts of the biological object and the magnetic field data detected by the magnetic field detector;
a conversion-formula generating unit that generates a conversion formula for converting the magnetic field data detected by the magnetic field detector into the movement waveform using the calibration points measured by the calibration-point measuring unit; and
a movement-waveform converting unit that converts the magnetic field data detected by the magnetic field detector to generate the movement waveform using the conversion formula generated by the conversion-formula generating unit,
wherein the calibration-point measuring unit comprises:
an apparatus-unique-voltage measuring unit that measures an apparatus-unique-voltage of the motor function analyzing apparatus with the magnetic field generator and the magnetic field detector being located apart from each other by a first distance greater than a maximum possible distance between the two predetermined parts of the biological object; and
a subject-unique-voltage measuring unit that measures a subject-unique-voltage for the biological object with the magnetic field generator and the magnetic field detector respectively attached to the two predetermined parts of the biological object and located apart from each other by a second predetermined distance,
wherein the conversion-formula generating unit generates the conversion formula using a first calibration point corresponding to the apparatus-unique-voltage and a second calibration point corresponding to the subject-unique-voltage.
2. A motor function analyzing apparatus comprising:
a movement-waveform generating unit which includes:
a magnetic field generator that generates a magnetic field, and a magnetic field detector that detects the magnetic field,
where each of the magnetic field generator and the magnetic field detector is respectively attached to one of two predetermined parts of a biological object, and a distance between the two predetermined parts changes with motion of the biological object, and
where the movement-waveform generating unit generates a movement waveform based on magnetic field data detected by the magnetic field detector, and
the movement-waveform generating unit further includes:
a calibration-point measuring unit that measures a calibration point corresponding to distance data between the two predetermined parts of the biological object and magnetic field data detected by the magnetic field detector;
a conversion-formula generating unit that generates an average conversion formula for converting the magnetic field data detected by the magnetic field detector into a movement waveform using the calibration point measured by the calibration-point measuring unit; and
a movement-waveform converting unit that converts the magnetic field data detected by the magnetic field detector to generate a movement waveform using the average conversion formula generated by the conversion-formula generating unit,
wherein the conversion-formula generating unit comprises:
an individual-conversion-formula generating unit that generates the conversion formula based on distance data obtained by measuring a distance between the two predetermined parts of the biological object to which the magnetic field generator and the magnetic field detector are attached by a predetermined measuring apparatus, and the magnetic field data detected by the magnetic field detector; and
an averaged-conversion-formula generating unit that generates an average conversion formula by calculating an average distance value for each of a plurality of voltage values based on a plurality of conversion formulae obtained for a plurality of biological objects by the individual-conversion-formula generating unit.
3. The motor function analyzing apparatus according to claim 2 , wherein the conversion-formula generating unit includes a conversion-formula compensating unit that compensates the average conversion formula for a range where no distance data corresponding to the magnetic field data is present in the average conversion formula generated by the averaged-conversion-formula generating unit using the calibration point obtained by the calibration point measuring unit.
4. The motor function analyzing apparatus according to claim 2 , wherein the individual-conversion-formula generating unit measures the distance data between the two predetermined parts of the biological object to which the magnetic field generator and the magnetic field detector are attached, and the magnetic field data.
5. The motor function analyzing apparatus according to claim 2 , wherein the individual-conversion-formula generating unit calculates the distance data and the magnetic field data by modeling a motion of the two predetermined parts of the biological object on a computer.
6. The motor function analyzing apparatus according to claim 1 , wherein the apparatus-unique-voltage measuring unit measures the apparatus-unique-voltage in a state that no magnetic field is detected by the magnetic field detector.
7. The motor function analyzing apparatus according to claim 1 , wherein the apparatus-unique-voltage measuring unit measures the apparatus-unique-voltage in a state that the magnetic field detector and the magnetic field generator are located a maximum distance from each other.
8. The motor function analyzing apparatus according to claim 1 , wherein the subject-unique-voltage measuring unit measures the subject-unique-voltage in a state that the second predetermined distance is approximately 0.