Abstract:
L'invention concerne le réglage de fréquence d'excitation par impulsion et de cycle opératoire d'un avertisseur (60) de véhicule. L'avertisseur est actionné par un circuit d'excitation d'essai (102) ayant une fréquence d'impulsion variable, et la fréquence à laquelle l'avertisseur produit le niveau de pression sonore maximum est considérée comme la fréquence de résonance prédéterminée. Ensuite l'avertisseur est actionné par le circuit d'excitation d'essai à la fréquence de résonance avec un cycle opératoire variable, et la valeur du cycle opératoire qui produit une force d'impact prédéterminée du piston (16, 16') contre la pièce polaire (22, 22') est considérée comme étant le cycle opératoire prédéterminé produisant l'impact est utilisé pour régler ledit cycle opératoire de l'avertisseur en fonction du type de celui-ci. L'avertisseur est ensuite actionné par son propre circuit électronique d'excitation (100) et la fréquence d'impulsion réelle de celui-ci est réglée, de préférence par l'ajustage laser d'une résistance (86) afin de s'adapter à la fréquence de résonance. L'avertisseur est actionné par son propre circuit d'excitation à la fréquence de résonance et le cycle opératoire est réglé.
Abstract:
PROBLEM TO BE SOLVED: To provide a vehicle approach report device capable of generating a report sound containing a low sound, even if a large-sized speaker such as a woofer is not used.SOLUTION: When the report sound is to be reproduced by making the report sound contain 250 Hz (the low sound difficult to be reproduced in a small-sized speaker), a signal generation part generates "many beat frequency signals" which have an overtone relationship with 250 Hz and are spaced by 250 Hz. Beat phenomena are generated at intervals of "250 Hz" in reproduced sound in the small-sized speaker, and the "250 Hz" which is not produced from the small-sized speaker can be heard as if the "250 Hz" were produced from the small-sized speaker by the beat phenomena. As a result of this, the report sound containing the "250 Hz" which cannot be reproduced in the small-sized speaker can be generated to the outside of a vehicle without using the large-sized speaker such as the woofer.
Abstract:
A system (204, 234, 236, 116, 616) and method (400, 500) for driving a vibrator (112) in an electronic device (102), as well as electronic device employing such a system or method, are disclosed. In one example embodiment, the system (204, 234, 236, 116, 616) for driving the vibrator (112) includes an integrated circuit (116, 616) having one or more input terminals (303, 304, 305, 306), one or more output terminals (336, 337), a vibrator driver amplifier circuit (330), and one or more additional circuit components (308, 310, 610). The system further includes at least one processing portion (234, 236) for providing one or more input signals (702, 801, 802, 902, 1002) to the one or more of the input terminals (303, 304, 305, 306). The system (204, 234, 236, 116, 616) is configurable such that one or more control signals (704, 810, 904, 1004) to be provided to the vibrator (112) will include one or more first signals (704, 810) if the vibrator (112) is a first vibrator device of a first type (114), and one or more second signals (904, 1004) if the vibrator is a second vibrator device of a second type (115) different from the first type.
Abstract:
The method of controlling a linear vibration welding apparatus, in accordance with the invention, may comprise the steps of: fastening a first workpiece portion in a fixed position; fastening a second workpiece portion to a reciprocating member; energizing a first single winding magnet with direct current power to create a magnetic field; sensing a location of the reciprocating member with respect to a zero point; and energizing a second magnet when the reciprocating member has crossed the zero point when moving towards the first magnet. The linear vibration welding apparatus in accordance with the invention may comprise: a frame; a flexure array; a first magnet assembly; a second magnet assembly; a digital controller; and direct current amplifiers for powering the magnet assemblies.
Abstract:
An electrical/mechanical/sound converter capable of stable operation when used in a mobile terminal such as a cellular phone to generate vibration for indicating an incoming call. The electrical/mechanical/sound converter comprises a housing (1a), and a detector coil (11) provided near a moving part (2) forming a magnetic circuit fitted with a suspension (3) into an opening in the housing (1a) to generate an excitation voltage from the vibration of the moving part (2). The electrical/mechanical/sound converter allows the detector coil (11) to detect strong vibrations of the moving part (2) in resonance as excitation voltage and feed it back, and provides extremely steady vibration even if the resonance frequency changes with variations in ambient temperature, etc.