JP2002186598A5 - - Google Patents

Description

The sensor unit 1 includes a tremor detection unit 5 for detecting minute vibrations of the body part, and a pressure change generated in the blood vessel when blood is pushed out to the aorta by contraction of the heart is transmitted in the elimination direction A pulse wave detection unit 7 for detecting a wave and a fixing means 9 for mounting and fixing the tremor detection unit 5 and the pulse wave detection unit 7 on a body part are provided. In this example, an acceleration sensor that senses acceleration in only one predetermined direction is used as the tremor detection unit 5. On the other hand, the pulse wave detection unit 7 includes a light emitting diode 7a that emits light corresponding to the absorption spectrum of blood hemoglobin to capture a change in blood vessel volume, and the emitted light is not absorbed by blood hemoglobin. A phototransistor 7b is used to capture the reflected light. Moreover, as the fixing means 9, a band which is attached and fixed by being wound around a finger is used. Then, when this band is wound around a finger (for example, forefinger), the light emitting diode 7a and the phototransistor 7b of the pulse wave detection unit 7 are disposed on the fingerprint side of the forefinger, and the acceleration constituting the tremor detection unit 5 The sensor is disposed on the nail side of the forefinger.

The device body 3 and the band as the fixing means 9 may be integrated, and the switch 11, the display unit 12, the tremor measuring means 21 and the pulse measuring means 23 may be attached to the fixing means 9.

Next, the usage and operation of the tremor measuring instrument will be described. First, the subject wears and fixes a band , which is the fixing means 9 as shown in FIG. 1, to the forefinger. At this time, the light emitting diode 7a and the phototransistor 7b of the pulse wave detection unit 7 are positioned on the fingerprint side of the forefinger, and the acceleration sensor constituting the tremor detection unit 5 is attached to abut the nail side of the forefinger. On the other hand, the apparatus main body 3 is placed at a predetermined position (for example, a measurement stand).

The subject presses the switch 11 to turn on the power, places the fingers except the forearm and forefinger on the measurement stand, floats the forefinger from the measurement stand so that the nail side is on the upper side, and holds it for a predetermined time. Measure

As a result of comparison and determination in step S5, if the pulse rate obtained by sampling this time is within ± 10% of the reference pulse rate, the fluctuation of the pulse rate is within the allowable range. It is determined whether the total sampling time of the data has reached the time required for tremor evaluation. If the total sampling time does not reach the time required for tremor evaluation, the process returns to step S1, further repeating the collection of data.

If the total sampling time has reached the time required for tremor evaluation, the process proceeds to step S7, where it is converted into a power spectrum by Fourier transform to obtain information on tremor.

Next, in step S26, it is determined whether the total of the sampling time of the tremor data has reached the time required for tremor evaluation, and if the total of the sampling times does not reach the time required for tremor evaluation, It returns to step S21. If the sum of the sampling times has reached the time required for tremor evaluation, it is converted to a power spectrum by Fourier transformation in step S27.

Next, based on the result of processing by the calculating means 17 in accordance with the processing procedure shown in FIG. 5 or FIG. 6 described above, the evaluation means 19 identifies the site of the subject's fault and measures the degree of fault, the degree of fatigue, the degree of stress, etc. Make an evaluation of The evaluation result is output to the display unit 12. For example, as shown in FIG. 1, the display unit 12 receives an output result from the CPU 15 to identify a tremor waveform or a pulse waveform, identify a failure site of the subject , evaluate the degree of the disorder, the degree of fatigue, the degree of stress, etc. Evaluation of is displayed.