Abstract: The electronic device is provided with an automatic leak detection means, notably for a gas leak, in the case of the device. The automatic leak detection means includes a pressure sensor, a temperature sensor and a calculation unit connected to the pressure sensor and to the temperature sensor. The calculation unit, which is a microcontroller, the pressure sensor and the temperature sensor are arranged inside the case. In operation, the microcontroller checks, based on measurements performed by the pressure sensor and the temperature sensor over time, whether the variation in pressure in the case is within a defined margin proportional to the variation in temperature to determine whether or not the case has a sufficient degree of sealing.

Abstract: The electronic device (1) is provided with an automatic leak detection means, notably for a gas leak, in the case (2) of the device. The automatic leak detection means includes an internal pressure sensor (3), an external pressure sensor (4) and a calculation unit (5) connected to the internal pressure sensor and to the external pressure sensor. The calculation unit, which is a microcontroller, and the internal pressure sensor are arranged inside the case, whereas the external pressure sensor is arranged on an external surface of the case. The microcontroller (5) checks, based on measurements performed by the pressure sensors over time, whether the pressure variation inside the case is different from the pressure variation outside the case to determine whether or not the case has a sufficient degree of sealing.

Abstract: The wearable device incorporates a device for measuring the ambient temperature, which comprises an infrared sensor. In an ambient temperature measurement mode a control circuit activates the infrared sensor several times so that it can supply a plurality of measurement signals over a certain period of time. A circuit for processing measurement signals is then arranged in order to supply temperature values corresponding to at least a portion of the measurement signals and to take a mean for at least a portion of these temperature values to obtain an average temperature value that is considered to be representative of the ambient temperature. The invention also relates to a method for measuring the ambient temperature that can be implemented by means of this wearable device.

Abstract: The electronic device is provided with an automatic leak detection means, notably for a gas leak, in the case of the device. The automatic leak detection means includes a pressure sensor, a temperature sensor and a calculation unit connected to the pressure sensor and to the temperature sensor. The calculation unit, which is a microcontroller, the pressure sensor and the temperature sensor are arranged inside the case. In operation, the microcontroller checks, based on measurements performed by the pressure sensor and the temperature sensor over time, whether the variation in pressure in the case is within a defined margin proportional to the variation in temperature to determine whether or not the case has a sufficient degree of sealing.

Abstract: The electronic device (1) is provided with an automatic leak detection means, notably for a gas leak, in the case (2) of the device. The automatic leak detection means includes an internal pressure sensor (3), an external pressure sensor (4) and a calculation unit (5) connected to the internal pressure sensor and to the external pressure sensor. The calculation unit, which is a microcontroller, and the internal pressure sensor are arranged inside the case, whereas the external pressure sensor is arranged on an external surface of the case. The microcontroller (5) checks, based on measurements performed by the pressure sensors over time, whether the pressure variation inside the case is different from the pressure variation outside the case to determine whether or not the case has a sufficient degree of sealing.

Abstract: There is disclosed a portable electronic device (1), particularly of the wristwatch type, comprising at least first and second analogue display members, a sensor (23, 52) powered to take measurements of a surrounding physical magnitude and a memory zone (26) for storing the measured physical magnitude values. The electronic circuits of the device are capable of operating the analogue display members, in an operating mode called the historic mode, such that at least one of them indicates the change in the stored value as a function of time opposite suitable graduations (8, 9, 33, 42, 51) of the device.

Abstract: The present invention proposes a portable barometric altimeter (10) including a pressure sensor (14), a calculation unit (16) which determines an altitude value (H) as a function of the pressure (P) measured by the sensor (14) and as a function of a reference temperature (T0) corresponding to an estimate of the temperature of the air mass at sea level, and a time measuring unit (18) that supplies calendar data (D), characterized in that it includes a correction circuit (32), which selects the reference temperature value (T0) from among a series of values (TS) contained in a database stored in the altimeter (10), as a function of the date (D) and as a function of a predefined climate value (C). The invention also proposes a method of determining altitude (H).

Abstract: The present invention proposes a portable barometric altimeter (10) including a pressure sensor (14), a calculation unit (16) which determines an altitude value (H) as a function of the pressure (P) measured by the sensor (14) and as a function of a reference temperature (T0) corresponding to an estimate of the temperature of the air mass at sea level, and a time measuring unit (18) that supplies calendar data (D), characterized in that it includes a correction circuit (32), which selects the reference temperature value (T0) from among a series of values (TS) contained in a database stored in the altimeter (10), as a function of the date (D) and as a function of a predefined climate value (C). The invention also proposes a method of determining altitude (H).

Abstract: There is disclosed a portable electronic device (1), particularly of the wristwatch type, comprising at least first and second analogue display members, a sensor (23, 52) powered to take measurements of a surrounding physical magnitude and a memory zone (26) for storing the measured physical magnitude values. The electronic circuits of the device are capable of operating the analogue display members, in an operating mode called the historic mode, such that at least one of them indicates the change in the stored value as a function of time opposite suitable graduations (8, 9, 33, 42, 51) of the device.

Abstract: There is described a portable device (1) including in particular a case (2) closed by a glass (3) and containing device for detecting the presence of water (22) in contact with an external region of the assembly formed by the case and the glass. In a preferred embodiment, the device for detecting the presence of water include a plurality of capacitive sensors (20) arranged in a peripheral region of the device (1) so as to undergo a variation in their respective capacitances when the latter is immersed in water. Thus, a quantity characteristic of the capacitance value of each sensor (20) is periodically measured and stored. After each measurement, the new value obtained is compared to the preceding one to detect any variation in the corresponding capacitance. When a part of the capacitive sensors (20) simultaneously see their respective capacitances vary considerably between two measurements, detection of the presence of water is validated.

Abstract: An electronic diving watch (1, 100) with analog display is described, comprising bidirectional means for moving the hour (13) and minute (14) hands respectively. The watch provides a diving mode of operation in which the hands displaying the current time are also used to display data relating to the dive. More particularly, the hour hand (13) is used to provide information vital to the wearer of the watch, namely the maximum remaining duration before it becomes necessary to effect a decompression stage during the ascent. An embodiment is described in which the duration of a single stage at 3 meters is also indicated once the maximum remaining duration has been exceeded.

Abstract: An electronic diving watch (1) with an analog display is described, comprising bidirectional driving means respectively of an hour hand (11) and a minute hand (12). The watch has a diving operating mode in which the display hands of the current time are likewise used in order to display data relating to the dive. More precisely, the hour hand (11) is used for the indication of information which is vital for the wearer of the watch, i.e. either that his body has not been subjected to physiological modifications which are significantly substantial enough for him to be required to observe a decompression stage during the ascent, or the parameters of the stage(s) to be effected, if need be. Liquid crystal screens (14, 15) are furthermore provided in order to display complementary information.

Abstract: The wristwatch includes in its case a resistive piezo-electric pressure and temperature sensor (26) exposed to a pressure chamber (42) communicating with the outside environment, for measuring ambient pressure. In order to provide individual calibration as a function of temperature followed by a permanent correction of the sensor pressure signals, the latter is fixed to the lower surface of a printed circuit board (30) bearing the electronic circuits (35) processing the sensor signals. The calibration parameters are stored in a non-volatile memory (36) of said circuits. A rigid and sealed separating wall (43) forms an internal bottom separating the pressure chamber (42) from the watch sealed part.

Abstract: The wristwatch includes in its case a resistive piezo-electric pressure and temperature sensor (26) exposed to a pressure chamber (42) communicating with the outside environment, for measuring ambient pressure. In order to provide individual calibration as a function of temperature followed by a permanent correction of the sensor pressure signals, the latter is fixed to the lower surface of a printed circuit board (30) bearing the electronic circuits (35) processing the sensor signals. The calibration parameters are stored in a non-volatile memory (36) of said circuits. A rigid and sealed separating wall (43) forms an internal bottom separating the pressure chamber (42) from the watch sealed part.

Abstract: There is described a portable device (1) including in particular a case (2) closed by a glass (3) and containing means for detecting the presence of water (20, 22) in contact with an external region of the assembly formed by the case and the glass. In a preferred embodiment, the means for detecting the presence of water include a plurality of capacitive sensors (20) arranged in a peripheral region of the device (1) so as to undergo a variation in their respective capacitances when the latter is immersed in water. Thus, a quantity characteristic of the capacitance value of each sensor (20) is periodically measured and stored. After each measurement, the new value obtained is compared to the preceding one to detect any variation in the corresponding capacitance. When a part of the capacitive sensors (20) simultaneously see their respective capacitances vary considerably between two measurements, detection of the presence of water is validated.

Abstract: An electronic diving watch (1) with an analog display is described, comprising bidirectional driving means respectively of an hour hand (11) and a minute hand (12). The watch has a diving operating mode in which the display hands of the current time are likewise used in order to display data relating to the dive. More precisely, the hour hand (11) is used for the indication of information which is vital for the wearer of the watch, i.e. either that his body has not been subjected to physiological modifications which are significantly substantial enough for him to be required to observe a decompression stage during the ascent, or the parameters of the stage(s) to be effected, if need be. Liquid crystal screens (14, 15) are furthermore provided in order to display complementary information.

Abstract: An electronic diving watch (1, 100) with analog display is described, comprising bidirectional means for moving the hour (13) and minute (14) hands respectively. The watch provides a diving mode of operation in which the hands displaying the current time are also used to display data relating to the dive. More particularly, the hour hand (13) is used to provide information vital to the wearer of the watch, namely the maximum remaining duration before it becomes necessary to effect a decompression stage during the ascent. An embodiment is described in which the duration of a single stage at 3 meters is also indicated once the maximum remaining duration has been exceeded.

Abstract: The timepiece (42) includes within the case (44) an electronic compass and a sighting device formed of two sighting marks (14, 15) arranged in the upper portion of the case (44) diametrically opposite each other and defining a reference axis of the case (44). The optical means formed by three light emitting diodes (54, 55, 56) are arranged on the surface of the case (44) in a peripheral region situated at six o'clock for warning or informing a user performing a sighting that the reference axis of the sighting device is aligned with a given azimuthal direction. In another embodiment, instead of the optical means, acoustic means or a buzzer are provided, capable of providing a vibration which is audible or perceptible by a user's body.