IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0178319
(2005-07-12)
|
등록번호 |
US-7698091
(2010-05-20)
|
우선권정보 |
EP-04103344(2004-07-13) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Eta Sa Manufacture Horlogere Suisse
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
9 |
초록
▼
The present invention provides a method for detecting the start of a dive for a portable electronic device (1) comprising a pressure sensor (5) for measuring the value of the ambient pressure (P) as well as electronic circuits (2) for processing the pressure measurement results comprising a time bas
The present invention provides a method for detecting the start of a dive for a portable electronic device (1) comprising a pressure sensor (5) for measuring the value of the ambient pressure (P) as well as electronic circuits (2) for processing the pressure measurement results comprising a time base (4) and at least one memory zone (7, 8). The detection method updates the reference pressure value (Pref) on the basis of ambient pressure (P) measurements, this value being used to detect the start of a dive. In certain particular conditions, the method according to the present invention suspects the start of a dive, and backs up the value (Psauv) of the reference pressure (Pref) stored before updating. If the start of a dive is confirmed after having been suspected, the reference pressure value (Pref) stored is replaced by the backed up value (Psauv) upon activation of the dive mode.
대표청구항
▼
What is claimed is: 1. A method for detecting the start of a dive for a portable electronic device having at least one first operating mode and one second operating mode, called the dive mode, and including a pressure sensor for measuring a value of ambient pressure as well as electronic circuits f
What is claimed is: 1. A method for detecting the start of a dive for a portable electronic device having at least one first operating mode and one second operating mode, called the dive mode, and including a pressure sensor for measuring a value of ambient pressure as well as electronic circuits for processing the results of said measurements including a time base and at least a memory zone, the method implemented in said first operating mode, including the steps of: a) periodically measuring an ambient pressure value at a first frequency, b) storing said ambient pressure value as a reference pressure in said memory zone at a second frequency lower than said first frequency, c) periodically calculating a first pressure variation value between the measured ambient pressure and the reference pressure at said first frequency and comparing said first pressure variation value to a predefined value, called the trigger threshold and stored in said memory zone, d) activating said dive mode if said first pressure variation value is higher than said trigger threshold or, in the opposite case, continuing to the next step e, e) calculating, at a third frequency, a second pressure variation value between the last two measured values of the ambient pressure and comparing said second pressure variation value to a predefined magnitude, or a mean pressure value determined on the basis of measured pressure values, stored in said memory zone, said magnitude or said mean pressure value being lower than said trigger threshold, said third frequency being less than or equal to said first frequency, f) returning to step a) if said second pressure variation value is less than or equal to said magnitude or, in the opposite case, implementing a dive start check loop comprising the operations of: storing said reference pressure value as a backup reference pressure value, returning to steps a) to d) for a predetermined period of time during which the stored reference pressure value is replaced by said backup reference pressure value if said dive mode is activated in step d), and returning as normal to steps a) to f) once said predetermined period of time has elapsed. 2. The detection method according to claim 1, wherein said first and third frequencies are equal. 3. The detection method according to claim 1, including the additional steps a′), c′), d′), e′) and f′) respectively identical to steps a), c), d), e) and f), implementation of said steps a′), c′), d′), e′) and f′) being inserted between two successive implementations of said steps a), c), d), e) and f). 4. The detection method according to claim 1, wherein said first frequency has a value comprised between 0.1 and 10 Hz. 5. The detection method according to claim 1, wherein said second frequency has a value comprised between 0.001 and 0.04 Hz. 6. The detection method according to claim 1, wherein the value of said trigger threshold corresponds to a height of water comprised between 0.2 and 1.5 meters. 7. The detection method according to claim 1, wherein the value of said predetermined period of time is comprised between 2 and 10 minutes. 8. The detection method according to claim 1, wherein, when said magnitude is determined on the basis of measured pressure values, step e) further includes an action of storing said pressure variation value at said first frequency, at least the last three stored pressure variation values being used to calculate said magnitude, the latter corresponding to the result of the calculation of the mean pressure variation over said at least three last values. 9. The detection method according to claim 8, wherein said magnitude is calculated on the basis of the last four stored pressure variation values.
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