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7608984 |
Motion amplification using piezoelectric element
A motion amplifier ( 22 ) comprises piezoelectric diaphragm ( 30 ) and drive electronics ( 26 ) for applying a drive signal to the piezoelectric diaphragm. The motion amplifier preferably comprises...
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7583010 |
Hybrid transducer
An embodiment of the invention is directed to a hybrid geometry type acoustic transducer. A hybrid geometry type acoustic transducer as embodied herein leverages different type transducer physical...
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7541720 |
Energy harvesting apparatus and method
An energy harvesting apparatus and method. In one form the apparatus makes use of a pair of flexible beams that are supported at first ends thereof from a base. Second ends of each of the beams are...
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7535156 |
Energy scavenger and method for manufacturing the same
A micro-electromechanical package includes a casing and a microelectronic circuit. At least one portion of the casing includes a piezoelectric material arranged such that, in use, dynamically...
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7525238 |
Ground insulated piezoelectric sensor for the measurement of acceleration or pressure
The invention describes a sensor comprising an element package 2 including piezoelectric elements with an upper area 6 and a lower area 7 . A preload sleeve 3 surrounds the said upper area ...
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7511404 |
Power generator using piezoelectric material
A power generator includes a first terminal; a second terminal surrounding the first terminal; piezoelectric elements disposed radially around the terminals, one end of each element being connected...
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7504764 |
Electric power generating apparatus for movement type equipment and self-generation system having the same
Provided are an electric power generating apparatus for a movement type equipment and a self-generation system having the same. The electric power generating apparatus for a movement type equipment...
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7504763 |
Power generator
A telemetry unit ( 100 ) is provided for mounting inside a pneumatic tyre. The unit ( 100 ) includes a piezoelectric power generator for supplying power to the unit ( 100 ). A piezoelectric element...
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7504761 |
Driving device
A driving device, comprises: an electro-mechanical conversion element enabled to expand and contract in response to input of an electrical signal; and a frictional member that is...
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7443075 |
Entrapment detecting system
An entrapment detecting system includes a detection portion provided at an opening/closing apparatus for detecting an acceleration thereof on the basis of an output from a piezoelectric sensor for...
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7408289 |
Piezoelectric actuator, and apparatus and method for actuating the same
A linear actuator using a metal beam-type piezoelectric material, and an apparatus and a method for actuating the same. The piezoelectric actuator includes: a moving member having a predetermined...
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7323632 |
Percussion transducer
A ring-shaped percussion transducer for converting a striking impact into a representative electrical pulse triggering signal is suitable for mounting on the center axis of a percussion instrument....
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7305867 |
Engine knock sensor
The piezoelectric element of an engine knock sensor is held between upper and lower ring-shaped bases by two identical clips that extend through the piezoelectric element and engage each base. Each...
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7299695 |
Acceleration sensor
An acceleration sensor includes a weight and a vibrator that supports the weight at its center of gravity. When acceleration is applied to the weight, stress equivalent to the applied acceleration...
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7294777 |
Electronic tone generation system and batons therefor
An electronic tone generation system including a plurality of separate, portable, handheld transmitters, or batons, that are provided as “instruments” to one or more players. Each baton can be...
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7263884 |
Vibration type gyrosensor device
Disclosed is a small-sized vibration type gyrosensor device of high sensitivity provided with a cantilevered oscillator. A cantilevered oscillator 11 , provided with a lower electrode, a...
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7201038 |
Knock sensor and manufacturing method thereof
A knock sensor is constructed by putting and fitting components including an annular piezoelectric element, terminal plate, insulating sheet and weight onto a base consisting of a flange portion...
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7180221 |
Piezo-electric assembly
A piezo-electric type of assembly for effecting and interfacing relative motion between two surfaces. The assembly consisting of a first and a second transducer to be driven by electrical signals....
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7167061 |
Tuning fork shaped crystal oscillator and method of fabrication thereof
The present invention provides a tuning fork shaped oscillator, an angular velocity sensor element, and an angular velocity sensor with improved breaking strength with respect to CI and drive...
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7134339 |
Acceleration sensor
A compact, high-sensitivity acceleration sensor that is prevented from being affected by factors other than acceleration, such as a change in temperature, has a bimorph acceleration-sensor element...
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7093489 |
Acceleration sensor
A piezoelectric vibrator 2 that generates an electric charge according to a stress and a weight 1 provided on the piezoelectric vibrator 2 are included. The piezoelectric vibrator 2 has...
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7078850 |
Piezoelectric power generation device and piezoelectric ceramics member used therefor
In a piezoelectric power generation device and a piezoelectric ceramics member used in the device excellent in its power generation efficiency in which the polarization of piezoelectric ceramics...
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7071597 |
Piezoelectric laminate motion sensing apparatus and method
A motion sensing system utilizing piezoelectric laminates with predetermined surface electrode patterns disposed thereon utilizes a frequency selector to pass motion waves of predetermined...
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7066026 |
Underwater acoustic vector sensor using transverse-response free, shear mode, PMN-PT crystal
The present invention is directed to an acoustic vector sensor, also called particle velocity sensor. <111> direction poled, shear mode, relaxor single crystals are used as the sensing...
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7005780 |
Power source apparatus
This invention relates to a power source apparatus using piezoelectric elements. A conventional power source apparatus using the piezoelectric element has an ability of generating less...
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6922879 |
Method of manufacturing an acceleration sensor
An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by...
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6868714 |
Vibration sensor for fixing directly or indirectly to a vibrating component
A vibration sensor for direct or indirect mounting on a vibrating component has a housing, a pressure sleeve having a central bore and a piezoelectric disk situated between two insulator disks and...
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6858970 |
Multi-frequency piezoelectric energy harvester
A piezoelectric device connected to a vibration source converts vibration energy to electrical current. A plurality of pairs of oppositely polarized piezoelectric wafers deflect to produce an...
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6830351 |
Electronic vibration dampening central rearview reinforcing assembly
A reinforcing structure for an automobile's central rearview mirror which includes an electronic vibration-dampening device. The reinforcing structure includes Piezo electric elements attached to a...
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6822373 |
Broadband triple resonant transducer
The present invention relates to a broadband transducer which comprises a tail mass located at a first end of the transducer, an active compliant driver section positioned adjacent the tail mass, a...
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6777857 |
Piezoelectric gyroscope system, and method of use
Disclosed are coriolis force driven piezoelectric gyroscope systems which each comprise two substantially orthogonally oriented elements projecting from a mass. Each substantially orthogonally...
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6771007 |
Vibration induced perpetual energy resource
A piezoelectric device connected to a vibration source converts vibration energy to electrical current. A plurality of pairs of oppositely polarized piezoelectric wafers deflect to produce an...
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6745052 |
Method and apparatus for signal equalization in a communication system with multiple receiver antennas
A communication receiver ( 400 ) minimizes a combined local and global mean square error for signal equalization. A base station ( 101 ) or a mobile station ( 102-104 ) may include a plurality of...
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6744181 |
Acceleration sensor
A piezoelectric type acceleration sensor which is small in size and has a high charge sensitivity and large static capacitance includes a piezoelectric element having a laminate of more than three...
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6710519 |
Acceleration sensor and method of manufacturing the same
An acceleration sensor includes a piezoelectric element and support frames for supporting the ends of the piezoelectric element in the longitudinal direction. The piezoelectric element is formed by...
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6655211 |
Piezoelectric accelerometer with laterally stabilizing element
The seismic mass ( 4 ) of an accelerometer that comprises at least one electromechanical transducer is stabilized in the direction perpendicular to the sensible axis by at least one laterally...
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6624551 |
Two-way mechano-electric transducer
A transducer for emitting and picking up mechanical vibrations includes a center body ( 4 ) suspended in a piezo-electric and elastic suspension structure ( 3 ) in a surrounding framework ( 2 )....
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6624548 |
Apparatus to position a microelectromechanical platform
The present invention comprises a microelectromechanical positioner to achieve substantially translational positioning of a platform without rotational motion, thereby maintaining a constant...
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6617764 |
High temperature piezoelectric sensor
The present invention provides a sensor that can be operated at high temperatures. The sensor comprises a first electrode, a second electrode, and an aluminum nitride film which lies between the...
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6564638 |
Vibrating gyroscope having an enhanced sensitivity
A vibrating gyroscope includes: a vibrator having an driving electrode and two detecting electrodes; a first drive circuit for applying a first drive signal to the driving electrode; a second drive...
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6532817 |
Angular velocity sensor and process for manufacturing the same
An integral bimorph angular rate sensor is formed by directly bonding two tuning fork members in the thickness direction to enhance the detecting sensitivity of the angular velocity sensor. The...
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6530276 |
Acceleration sensor and acceleration apparatus using acceleration sensor
An acceleration sensor having a well controlled dispersion in the detection characteristics and improved detection characteristics in the low frequency detection comprises a first piezoelectric...
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6429576 |
Centrifugal impulse piezoelectric electrical generator
A piezoelectric generator comprises a centrifugal force sampling mechanism being carried around a central axis. The direction of the centrifugal forces, do to rotational control, acting on the...
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6414416 |
Monolithic vibrating rate gyro structure
A vibrating rate gyro structure machined in a plate of material and comprising a fixed part, a resonator, and a mechanical system connecting the resonator to the fixed part. The mechanical system...
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6397677 |
Piezoelectric rotational accelerometer
A rotational accelerometer using piezoelectric material, preferably quartz, in a shear orientation. Piezoplates and conducting seismic masses, each having bores therethrough, are bolted to posts...
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6378368 |
Oscillation gyro equipped with thin PZT film
An oscillation gyro ( 1 ) including a stainless steel base member ( 4 ) which is a quadratic prism, wherein the base member ( 4 ) has through holes ( 10, 7 ) extending in the directions crossing at...
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6376967 |
Inertial/audio unit and construction
An electrically driven signal unit is adapted for one-step assembly or injection molding with a device housing to vibrate, flex, beep or emit audio signals, or to sense and provide tactile feedback...
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6346765 |
Vibrator, vibratory gyroscope, and vibrator adjusting method
A vibrator of a vibratory gyroscope comprises a main arm having a base part and at least one bending-vibration piece extending from the base part in a direction crossing the longitudinal direction...
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6342749 |
Vibration exciter
A curved piezoelectric device is attached to a plate to vibrate the plate. Mass-loading is applied to at least one free end of the piezoelectric device to increase output.
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6342747 |
Wing type ultrasonic transducer
A wing type ultrasonic transducer is free from a reduction in the output power and has one ultrasonic generator. This ultrasonic generator has piezoelectric ceramic materials with two countermasses...
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