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US4896675A
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Apparatus for monitoring degree of mental tension
Assignee: Mitsubishi Electric Corp
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Filing: 1989-02-16
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Granted: 1990-01-30
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Expires: 2009-02-16
Abstract
Abstract An apparatus for monitoring mental tension comprises a first measuring unit for measuring a periodic wave related to a contraction activity of the heart of a person to be monitored; a detecting unit for detecting special waves which periodically appear in the periodic wave measured by the first measuring unit; a second measuring unit for measuring the interval at which the special wave are generated; a first processor for providing, as tension index values, a mean value of an interval train of the special waves and the magnitude of a respiration component of the fluctuation of the interval train; and a display unit for displaying the resulting tension index values.
Inventors
- 👤 Mieko Ohsuga
- 👤 Futomi Shimono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/48; A61B5/486; Y; Y10; Y10S; Y10S128/00; Y10S128/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
An apparatus for monitoring mental tension, comprising: first measuring means for measuring a periodic wave related to a contraction activity of the heart of a person to be monitored; detecting means for detecting special waves which periodically appear in said periodic wave measured by said first measuring means; second measuring means for measuring an interval at which said special waves are generated; first processing means for providing as tension index values, a mean value of an interval train of said special waves and magnitude of a respiration component of fluctuation of said interval train; and display means for displaying said tension index values.
Claim 2
Independent Claim
103 words
An apparatus for monitoring mental tension, comprising: first measuring means for measuring a periodic wave related to a contraction activity of the heart of a person to be monitored; detecting means for detecting special waves which periodically appear in said periodic wave measured by said first measuring means; second measuring means for measuring an interval at which said special waves are generated; first processing means for providing as tension index values, a mean value of an interval train of said special waves and magnitude of a respiration component of fluctuation of said interval train; and display means for displaying said tension index values.
Claim 3
Dependent Claim
60 words
An apparatus according to claim 1, further comprising: second processing means for providing at least one frequency of respiration component of said fluctuation and the magnitude of a low frequency component of the fluctuation of said interval train as a reliability evaluation value for evaluating reliability of said tension index values; and output means for outputting said reliability evaluation value.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 1 or 2, further having respiration stabilizing means for stabilizing the respiration of the person being monitored, thereby raising the reliability of said tension index values.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |