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.
Abstract:
A screening machine (100) that uses electrically controlled transducers to vibrate a separating screen (102). The transducers (104) can be piezoelectric patches, discrete piezoelectric components, or electromagnetic shakers. Further, the transducers (104) can be coupled directly to the screen (102) or through a vibration amplifier (116). The transducers (104) and/or amplifiers (116) can be coupled to the screen at different attachment locations. One or more of the transducers (104) can be used as sensors to provide feedback for operation control.
Abstract:
A drive for driving a vibration source comprises a sound source (10) for generating tone signals, a DC motor (24) as a vibration source, a low-pass filter (LPF) (16) for extracting low-frequency components from tone signals output from the sound source (10), a detector circuit (18) for detecting the output signal from the low-pass filter (16), a rectifier circuit (20) for rectifying the output from the detector circuit (18), and an amplifier (22) for driving the vibration source based on the low-frequency components extracted by the low-pass filter (16).
Abstract:
A circuit of the present invention is a driving circuit for driving a vibrator having a mechanical vibration system which resonates at a resonance frequency. The driving circuit outputs to the vibrator at least two signals of different frequencies which are included in a frequency range including the resonance frequency. The vibrator has a function of converting an electric signal into at least one of a sound and a vibration.
Abstract:
In a portable device for driving a vibration actuator by means of a battery, a power supply circuit equipped with a boosting circuit for converting a voltage of a built-in battery 1 into a high voltage and a pulse generating circuit for intermittently supplying power to the vibration actuator is provided, and a boosted DC or AC voltage is impressed on the vibration actuator continously intermittently or discontinously.
Abstract:
A self-exciting vibratory device for producing vibration signals in a housing includes actuator means (12) attached to housing (16), sensor means (14) attached to housing (16) and electronics module (18) connecting actuator means (12) and sensor means (14). Actuator means (12) creates vibration signals within housing (16). Sensor means (14) senses the vibration signals created by actuator means (12). Electronics module (18) amplifies and phase shifts the vibration signals sensed by sensor means (14) and containing resonant modes of vibration of housing (16). Electronics module (18) then supplies these amplified, phase shifted signals to actuator means (12) to enhance the vibration of housing (16) at the dominant mode of vibration of housing (16).
Abstract:
A vehicle horn system (10) is disclosed which provides a plurality of different sounds, each indicative of the occurence of a different event. The horn system includes a vehicle horn (14), a horn switch (24), and a control circuit (12) having a plurality of inputs, one of which is coupled to the horn switch (24). Activation of the horn switch (24) causes the control circuit (12) to operate the horn (14) to produce a standard horn warning. Other events for which the horn system produces an audible alert include backing-up of the vehicle and changes in the vehicle alarm status. The horn system can include a vehicle alarm sensor (24) and a second vehicle horn (16) that produces a different sound than the first horn (14). The control circuit (12) is configured to operate only one of the horns when the vehicle is travelling below a certain speed and to operate both horns when the vehicle is travelling above that speed.