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8176773 |
Piezoelectric sensor and sensing instrument
To provide a piezoelectric sensor in which a first electrode for measurement and a second electrode for reference are provided apart from each other on one surface side of a piezoelectric piece and...
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8150462 |
Connection box
Field devices for measuring a pressure or a fill level are connected, by way of a cable connection or a radio connection, to stationary evaluation- and display devices. To provide flexible...
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8102101 |
Piezoelectric sensors
A piezoelectric sensor having a plurality of electrodes deposited on a single surface of the dielectric medium is generally provided. The plurality of electrodes can define a plurality of...
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8080922 |
Ultrasonic sensor having a cover including a damping element
An ultrasonic sensor, in particular for a vehicle, including a housing, includes the following: a transducer element which is attached to the bottom of the housing for generating ultrasonic...
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8004152 |
Electronic tongue sensor
The disclosure may relate to example embodiments of an electronic tongue sensor that may include an array of piezoelectric quartz crystal sensors with at least one coating specific for sensing a...
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7876023 |
Piezoelectric/electrostrictive membrane sensor
Disclosed is a piezoelectric/electrostrictive membrane sensor wherein the main component of terminal electrodes is contained in the vicinity of the surface of a piezoelectric/electrostrictive body....
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7851769 |
Motorized manipulator for positioning a TEM specimen
The invention relates to a motorized manipulator for positioning a TEM specimen holder with sub-micron resolution parallel to a y-z plane and rotating the specimen holder in the y-z plane, the...
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7812506 |
Piezoelectric/electrostrictive membrane type measuring device
A piezoelectric/electrostrictive membrane type sensor is provided with a ceramic base body and a piezoelectric/electrostrictive element. The ceramic base body includes a thin diaphragm portion, a...
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7741745 |
Attaching structure of resolver, dynamo-electric machine and attaching method of resolver
A resolver stator portion is attached to a resolver stator portion side attaching portion formed at a position facing to a resolver rotor portion via an elastic ring. Thus, it is possible to absorb...
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7663295 |
Method and system for measuring physical parameters with a piezoelectric bimorph cantilever in a gaseous or liquid environment
A piezoelectric bimorph cantilever is used for determining physical parameters in a gaseous or liquid environment. The sensor works as a driven and damped oscillator. Contrary to common cantilever...
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7555947 |
Air pressure sensor
An air pressure sensor capable of measuring air pressure highly accurately with a simple configuration is provided. The sensor includes: a sealed case with a sealed space formed therein; a first...
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7555952 |
Sensing device
The present invention prevents instability of frequency measurement caused by spatial connection between quartz sensors adjacent to each other when a plurality of quartz sensors, including a quartz...
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7554247 |
Component measuring device
An object of the present invention is to perform measuring work easily when detecting the presence or absence of an object to be measured or the concentration thereof using a plurality of quartz...
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7482732 |
Layered surface acoustic wave sensor
A surface acoustic wave sensor which incorporates: a) a first layered SAW device consisting of a piezoelectric crystal such as lithium niobate or lithium tantalate with interdigital electrodes on...
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7397167 |
Ultrasonic wave generating device
An ultrasonic wave generating device includes a substrate, a heat insulation layer on the substrate, a membrane heating portion on the heat insulation layer, and a membrane oscillator on the...
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7368855 |
Piezoelectric vibration sensor
A sensor unit for picking up mechanical vibrations, sound and ultrasound has at least one piezoelectric foil strip (piezo strip) as a sensor element. The piezo strip has signal wires attached...
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7161280 |
Ultrasonic transducer and method of joining an ultrasonic transducer
The invention concerns an ultrasonic transducer, which is assembled from several parts. These parts are a protecting plate, a piezoelectric disc and a housing. Joining of the parts for transducers...
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6848299 |
Quartz crystal microbalance with feedback loop for automatic gain control
An analytical apparatus, such as a quartz crystal microbalance, comprises a piezoelectric sensor and an oscillator circuit, coupled to the sensor, to oscillate at a frequency substantially...
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6763285 |
Adaptive compensation of sensor run-out and mass unbalance in magnetic bearing systems without changing rotor speed
The present invention provides a method and system for stabilizing a rotor about its geometric center in a magnetic bearing system at a constant rotor speed. In the method, the controller for...
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6424077 |
Manipulator
A plurality of linear actuators (10, 20, 30) connected in sequence orthogonally to one another constitute rectilinear movement means having a plurality of degrees of freedom in rectilinear...
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6392827 |
Drive and guide mechanism and apparatus using the mechanism
A lens driving device which does not make larger an apparatus in which the device is installed, which ensures a longer span for preventing a tilt of a lens therein, and which allows an easy access...
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6194811 |
Drive apparatus
A drive apparatus having a drive pulse generation device that generates drive pulses. An electromechanical transducer has a first end and a second end. The electromechanical transducer expands and...
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6147434 |
Drive device using electromechanical transducer and apparatus equipped with the device
A drive device using a piezoelectric transducer for correcting a shift of a position of a drive system based on a change in an environmental state such as environmental temperature, in which a...
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5890643 |
Low mass ultrasonic bonding tool
A novel low mass transducer for bonding machines comprises a transducer generator which mounts on or is coupled to a bonding tool of the type used for ball bonding, wedge bonding and TAB bonding....
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5815079 |
Device for establishing and/or monitoring a predetermined filling level in a container
A description is given of a sturdy device for establishing and/or monitoring a predetermined filling level in a container, which device exhibits a housing (1), two oscillating rods (3, 4)...
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5631633 |
Device for determining and/or monitoring a predetermined material level in a container
The determination and/or monitoring of a predetermined material level in a container is effected with the help of a material level sensor which contains a mechanical oscillatory structure, an...
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5596145 |
Monolithic resonator for vibrating beam force sensors
A monolithic resonator for a vibrating beam device, either an accelerometer or a pressure transducer, includes an outer structure and an inner structure. The outer structure includes a mounting...
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5568004 |
Electromechanical positioning device
An electromechanical positioning device to be used for positioning, for example, a probe-tip (12) in a scanning tunneling microscope, an electron emitter in a field electron gun, a mirror in an...
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5520050 |
Driving and detecting circuit of a vibrator
First switching elements 28, 30 and resistors 36, 38 are connected to piezoelectric elements 16a, 16b of a vibrating gyroscope 12. An oscillation circuit 32 and a phase correction circuit 34 are...
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5430341 |
Miniaturized power supply for an electroactive actuator
A circuit for providing from a low voltage input, a high voltage output to a segmented electroactive actuator, wherein each of the segments function as a filter capacitor and a load, comprising a...
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5408168 |
Device for determining and/or monitoring a predetermined filling level in a container
The device comprises at least two oscillation rods that are mounted at a distance from each other on a membrane, the edge of which are connected with a screw insert. A clamping screw is connected...
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5389849 |
Tactility providing apparatus and manipulating device using the same
A detecting portion outputs a contact state signal in accordance with a contact state with respect to an object to be manipulated. The contact state signal represents at least one of information of...
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5375336 |
Gyro-compass
A support base of an angular velocity sensor is supported rotatably at one end, and the support base is vibrated by a piezoelectric element. By this vibration, a known rotational angular velocity...
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5302878 |
High-frequency acoustic rheometer and device to measure the viscosity of a fluid using this rheometer
An acoustic rheometer working in the high frequency range comprises a torsional-mode transducer which is a crystal of the sillenites class, having a height that determines the resonance frequencies...
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5281899 |
Electrical drive for a segmented transducer
An electronic system is provided for stimulating a segmented transducer with resonant electrical signals to produce a nonsinusoidal transducer output. In an illustrative embodiment, the transducer...
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5264831 |
Device for determining and/or monitoring a predetermined contents level in a container
To determine and/or monitor a predetermined contents level in a container, at the height of the level to be monitored a region of the container wall is defined by a ring or frame which is attached...
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5264755 |
Stepping motor to drive a body, especially a shaft, through small angles of rotation per step
A stepping motor for rotating a body through small angles of rotation, the stepping motor having a stator and a rotor, an actively moveable connection unit for selectively connecting each of the...
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5191316 |
Apparatus for determining and/or monitoring a predetermined contents level in a container
The apparatus comprises at least two oscillating rods which are secured spaced from each other to a diaphragm, the edge of which is connected to a screw-in piece. On the side of the diaphragm...
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5190383 |
Dot printing apparatus
A dot printing apparatus in which the piezoelectric print head having the piezoelectric element connected to the printing wire is utilized and the secondary bounce of the printing wire is...
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5179028 |
Antibody coated crystal chemical sensor
A sensor for detecting the presence of a particular chemical by determining the absolute frequency shift in the oscillating frequency of an antibody-coated oscillator. Specific antibodies deposited...
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5172024 |
Device for the removal of the ice formed on the surface of a wall, notably an optical or radio-electrical window
A device to eliminate ice formed on the surface of a wall, notably on the surface of an optical or radio-electric window, comprises a piezoelectric material having a vibrating active surface that...
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5164710 |
Method of obtaining a thread running signal
In a method of obtaining a thread tension signal a sensor in the form of a piezofoil is attached to a thread guide or to its mounting and delivers a signal which reflects, amongst other things, the...
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5144208 |
Device for adjusting a nominal value of the dimension of an actuator, the longitudinal dimension of which can be changed by applying an external electromagnetic or electrostatic field
A device for adjusting a nominal value of the dimension of an actuator, the longitudinal dimension of which can be changed by applying an external electromagnetic or electrostatic field, the...
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5138217 |
Driving power unit for piezoactuator system and method
A driving power unit for a piezoactivator is disclosed that utilizes a semiconductor switching device for supplying power to the piezoelement. When the voltage measured across the piezoelement...
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5136202 |
Material sensor
A material sensor employs deflectable means and piezoelectric film means for providing signals indicative of a material condition.
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5095256 |
Drive circuit for a piezoelectric actuator
A drive circuit for driving a piezoelectric (PZ) stack, in response to an excitation voltage, generates a dimensional strain varying along a sinusoidal waveform in a PZ stack by applying an...
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5070319 |
Door ajar alarm for refrigeration unit
An alarm system for signalling when a door of a refrigeration unit compartment is not fully closed comprises an alarm condition sensing system having a door sealing gasket magnet and a magnetically...
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5053668 |
Apparatus for driving piezoelectric element for closing and opening valve member
In an apparatus for driving a piezoelectric element to close and open a valve member by expanding and contracting a volume of a pressure chamber, at an initial stage of a closing state of the valve...
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5051646 |
Method of driving a piezoelectric scanner linearly with time
In a scanning device producing an image from data obtained from a nonlinear piezoelectric scanner having an attached end and a free end providing the data from a lateral scanning motion of the free...
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5036263 |
Piezoelectric actuator driving apparatus
Disclosed is a piezoelectric actuator driving apparatus in which a piezoelectric element used to operate as an electro-mechanical transducer is suitably charged and discharged so that the...
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