Organism state measuring device and relaxation instructing device
US6081742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Aug 4, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/726
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Devices are known for measuring a subject's respiratory rate based on the subject's pulse wave or level of electrocardiogram. When the subject is exercising or carrying out daily activities, however, an electromyogram becomes imposed on the cardiogram waveform, so that a body motion component is superimposed on the pulse wave. This leads to an incorrect measured result. To overcome this drawback, a portable portion in the form of a wristwatch worn by the subject and a personal computer comprising device main body 330 are provided. A photoelectric pulse wave sensor is attached to the base of the subject's finger, and the pulse waveform is measured. An acceleration sensor is provided to the portable portion, and employed to detect the subject's body motion spectrum. Device main body 330 performs a window function on the pulse wave, and removes the acceleration component, so that the body motion spectrum is removed from the frequency spectrum of the pulse wave. Using the obtained result, the respiratory rate and change rate of the respiratory rate are generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.