摘要:
A timepiece which includes a case (2), a horometric movement (4) housed within the case (2) and means for broadcasting an electromagnetic signal including electronic means (12) for furnishing the signal and at least one broadcasting antenna (14) coupled to the electronic means (12). Such timepiece is characterized in that the antenna (14) is arranged on a first face (20a) of a support plate (20) of basically planar form arranged in the interior of the case (2), such antenna (14) being constituted by a thin metallic layer deposited on the face (20a) of the support plate (20). This timepiece is applicable to the control of an arrangement, for example for latching and unlatching, of a door in particular.
摘要:
A highly stable frequency generator (G) comprises an oscillator (10) for generating a first frequency (F1), and further comprises a time base (BT) providing a time stable frequency signal which is independent of the temperature, and a feedback circuit arranged to provide a first number of pulses (n.sub.T) coming from the oscillator (10) to a comparing circuit (13), a circuit (14) for providing a reference number of pulses (N.sub.T) to said comparing circuit (13), and a circuit (13,15,16) providing a correction signal (Sc) as a function of the difference (.DELTA.) between the first number (n.sub.T) and the reference number (N.sub.T), the generator (G) further comprising a correction circuit (17) of the oscillation frequency (F1) of said first oscillator (10), this correction circuit being controlled by said control signal (Sc).
摘要:
This invention concerns a wireless data communication method, wherein a transmitter device having a first wide band antenna transmits ultra-wide band encoded data signals to a receiver device having a second wide band antenna for receiving the direct and/or multiple path coded data signals. The transmitted data is defined by one or several sequences of N pulses where N is an integer number greater than 1. The arrangement of the N pulses of each sequence represents a data coding relative to the transmitter device. The N pulses of a sequence of direct and/or multiple path coded data signals received by the receiver device are processed each in one among N corresponding reception time windows. Each of the N reception time windows is positioned in time based on a known theoretic arrangement of the N pulses of signals transmitted by the transmitter device. An adding operation of the N windows is then performed in the receiver device so that the amplitude level of the constantly added pulses is higher than the amplitude level of the noise sensed by the receiver device.
摘要:
This invention provides protection against power supply failure, in particular of electronic circuits of timepieces powered by photovoltaic batteries. The invention comprises a continuous electric power supply comprising: an electrical continuous source (G) coupled to a power output (VDD, GND); energy storing means (6); and a reversible dc/dc electric converter (5) coupled both to the power output (VDD, GND) and to the energy storing means (6). The converter (5) comprises switching means (T1, T2, T3, T4) for modifying its configuration. The power supply storing means (6) comprise essentially a capacitor (C). Preferably, the reversible converter (5) is a dc/dc converter, the converter being a voltage multiplier in a first configuration and being a voltage divider in a second configuration.
摘要:
There is disclosed a wristwatch having a case containing a mechanical watch movement (10) driven by a spring barrel (14) and provided with a mechanical regulator with a balance and balance-spring, which is associated, via electromagnetic coupling, with an electronic regulator driven by a quartz resonator. The rim of the balance (13) is provided with a pair of permanent magnets (38, 39). The electronic regulator includes a fixed coil (12) arranged for cooperating with said magnets via electromagnetic coupling, a rectifier (58) provided with at least one capacitor, and a circuit (60) for enslaving the frequency of the mechanical regulator to the frequency of the oscillator by braking obtained by briefly short-circuiting the coil. In order to enable a common type of mechanical movement to be used, only the balance of which is altered, the electronic regulator is formed by a structural module (11) that is entirely separate from the mechanical watch movement (10). This module can be fixed to the movement plate, or, conversely, carried by the watchcase independently of said movement, in particular via a casing ring (26). Apart from the coil, all of the rest of the electronic module (11) is preferably located outside the mechanical movement.
摘要:
An oscillator, such as a ring oscillator, uses CMOS transistors. At least some of the transistors have forward biased, current limited source-tub junctions for lowering the threshold voltages of these transistors. This enables the oscillator to operate at very low supply voltages, and it may be used in an electronic timepiece powered by a single photovoltaic cell.
摘要:
A method for measuring the distance e separating two faces (3, 4) of an object (1) employs the ultrasonic wave diffused back by said faces and received by a sensor (6). Following digitalization (11), the temporal signal is transformed (12) into a frequency spectrum. The modulus of the frequency spectrum is established (13) then the logarithmic derivative thereof is calculated (15) from whence there results a useful signal including a periodic signal onto which a linear signal is superposed. Following suppression (14, 16) of the linear signal the useful signal is applied (17) to a frequency window in order to eliminate the noise therefrom. The signal thus obtained is inversely transformed (18) to obtain a signal the amplitude of which is a function of the time and the envelope of this latter signal is determined (19). After having determined the temporal spread .DELTA.t separating the time origin from the envelope peak showing the greatest amplitude, the distance e is calculated from the relation e=c.multidot..DELTA.t/2, c representing the propagation velocity of the ultrasonic wave. The method may be employed for the non-invasive measurement of the thickness or diameter of an artery or indeed for the measurement of the thickness of thin layers.
摘要:
The method of synchronising the analogue display (41) of a timepiece (40), including an electronic time base (64), is achieved using proximity sensors (60, 62) respectively associated with wheels (46, 48) each having an aperture (54, 56) for defining the angular position of the latter. Determination of the angular position of a wheel requires an angular distance of around 60° to 90° to be travelled with this type of proximity sensor. Dependency of the measurement results upon the temperature generates a problem of precision in determining the angular position of the wheels, in particular a wheel secured to the hour indicator, given that an angle of 60° to 90° corresponds to a time interval of 2 to 3 hours. In order to ensure a measurement in a relatively short time interval where the ambient temperature is substantially constant and thus has no influence on the measurement, the invention provides that, in a analogue display synchronisation mode at least one indicator is driven in an accelerated advance mode so that the aperture provided in the corresponding wheel quickly passes opposite the proximity sensor associated with that wheel.
摘要:
The timepiece (1) includes a mainspring (2) driving the rotor (3a) of an electromechanical converter (3) and time display hands (6). A circuit (7) for enslaving the real angular position of the rotor (3a) to its desired angular position is supplied with electrical energy by the converter (3). In order to increase the autonomy of the timepiece (1), the enslaving circuit (7) includes means (28) which store a portion of the electrical energy generated by the converter (3) and means (21, 23 to 27) which use this stored electrical energy to apply driving pulses (IM) to the converter (3) when the rotor (3a) has a greater retardation than a determined retardation, with respect to its desired angular position.
摘要:
Data transmission system comprising a data transmitter (1) including:swept frame display means (2), anda generator of composite video signals (20, 22) to control the operation of said swept frame display means (2); anda portable information detection device (7) for receiving said transmitted data by said data transmitter (1).The data transmitter (1) further comprises means (23) for modulating at least one of the elementary signals constituting said composite video signals with the data to be transmitted, and said information detection device (7) further comprises any inductive antenna (44, 45) for detecting said modulated elementary signal.