2176 results about "Piezoelectric motor" patented technology

A robot system for use in surgical procedures has two movable arms each carried on a wheeled base with each arm having a six of degrees of freedom of movement and an end effector which can be rolled about its axis and an actuator which can slide along the axis for operating different tools adapted to be supported by the effector. Each end effector including optical force sensors for detecting forces applied to the tool by engagement with the part of the patient. A microscope is located at a position for viewing the part of the patient. The position of the tool tip can be digitized relative to fiducial markers visible in an MRI experiment. The workstation and control system has a pair of hand-controllers simultaneously manipulated by an operator to control movement of a respective one or both of the arms. The image from the microscope is displayed on a monitor in 2D and stereoscopically on a microscope viewer. A second MRI display shows an image of the part of the patient the real-time location of the tool. The robot is MRI compatible and can be configured to operate within a closed magnet bore. The arms are driven about vertical and horizontal axes by piezoelectric motors.

We describe a system of electronically active inks which may include electronically addressable contrast media, conductors, insulators, resistors, semiconductive materials, magnetic materials, spin materials, piezoelectric materials, optoelectronic, thermoelectric or radio frequency materials. We further describe a printing system capable of laying down said materials in a definite pattern. Such a system may be used for instance to: print a flat panel display complete with onboard drive logic; print a working logic circuit onto any of a large class of substrates; print an electrostatic or piezoelectric motor with onboard logic and feedback or print a working radio transmitter or receiver.

A micro-actuator is comprised of a piezoelectric motor mounted on a flexure tongue with offsetting hinges, to perform a fine positioning of the magnetic read/write head. The substantial gain in the frequency response greatly improves the performance and accuracy of the track-follow control for fine positioning. The simplicity of the enhanced micro-actuator design results in a manufacturing efficiency that enables a high-volume, low-cost production. The micro-actuator is interposed between a flexure tongue and a slider to perform an active control of the fly height of the magnetic read/write head. The induced slider crown and camber are used to compensate for thermal expansion of the magnetic read/write head, which causes the slider to be displaced at an unintended fly height position relative to the surface of the magnetic recording disk. The enhanced micro-actuator design results in reduced altitude sensitivity, ABS tolerances, and reduced stiction. The controlled fly height of the magnetic read/write head prevents a possibility of a head crash, while improving the performance and data integrity.

A system of electronically active inks is described which may include electronically addressable contrast media, conductors, insulators, resistors, semiconductive materials, magnetic materials, spin materials, piezoelectric materials, optoelectronic, thermoelectric or radio frequency materials. We further describe a printing system capable of laying down said materials in a definite pattern. Such a system may be used for instance to: print a flat panel display complete with onboard drive logic; print a working logic circuit onto any of a large class of substrates; print an electrostatic or piezoelectric motor with onboard logic and feedback or print a working radio transmitter or receiver.

A haptic feedback controller 100 according to the present invention is a haptic feedback controller that controls a controlled appliance and includes a base 110, a cap 120, a piezoelectric motor 130, a rotation control device, and a rotational state detecting device.

According to haptic feedback controller 100 of the present invention, the piezoelectric motor 130 that can produce a large torque even when rotating at low speed is used, so that even when the cap 120 is rotated at low speed, sufficiently large haptic feedback can be applied to the cap 120. Also, since the base 110 and the cap 120 are respectively fixed to the stator 140 and the rotor 150 of the piezoelectric motor 130, there is no backlash. As a result, according to the present invention it is possible to provide a haptic feedback controller for which there is no loss in the ability to express haptic feedback, so that a wide variety of haptic feedback can be expressed.

A technology, wherein unstable operation of the ultrasonic motor is prevented, when the ultrasonic motor is driven at the lower speed out of at least two types of speeds, and life extension is attempted, is disclosed, and according to this invention, when the ultrasonic motor 3 is driven at a comparatively low-speed during normal driving, unstable operation due to driving at a comparatively low-speed can be prevented and life extension can be attempted by driving the ultrasonic motor at a comparatively high-speed every predetermined period of time.

A drug delivery pump drive which uses a linear piezoelectric motor to advance a syringe piston to deliver a liquid drug and a method thereof are disclosed. The pump drive, provided in a drug delivery pump, provides silent operation and very low energy consumption compared to electric motor-based drives. The small size of the motor helps also to reduce overall size of the pump drive and the resulting drug deliver pump.

Liquid infusion apparatus includes non-magnetic materials in a pumping structure and ultrasonic drive motor therefor, and in a controller that supplies drive signals to the motor to facilitate convenient operation in intense magnetic fields without distorting the magnetic fields and without radiating objectionable radio-frequency interference. A non-MRI-compatible liquid infusion apparatus is temporarily replaced with MRI-compatible, non-magnetic liquid infusion apparatus without disconnecting a patient from an installed intravenous infusion set to continue infusing liquid within the MRI environment. The pumping apparatus operates on a segment of a liquid conduit that is mounted in tension between a linear peristaltic pump and platen, with associated safety interlocks to assure proper operation of infusing liquid into a patient compatibly with conditions in an MRI environment. Drive circuitry generates low-harmonic signals for operating the ultrasonic motor at variable speeds to compensate for flow rate discontinuities through the peristaltic pumping cycles.

Adhesive attachment features for bonding piezoelectric motors to a load beam substrate. The attachment features have one or more reliefs under or partially under or adjacent to a piezoelectric transducer to control the flow of adhesive by limiting or influencing adhesive travel or flow and simultaneously preventing excessive adhesive fillet height adjacent the piezoelectric motor while simultaneously providing for improved bond strength between the piezoelectric element and the load beam.

An operating apparatus 1 of the present invention has a driven element 5, a frame 4 having a contacted element 51 and rotatably supporting the driven element 5, and an ultrasonic motor. The ultrasonic motor includes a vibrating element 6. The vibrating element 6 includes a first piezoelectric element 62 that undergoes extension and contraction by application of an AC voltage, a reinforcing plate 63 having a contact portion 66 and an arm portion 68, and a second piezoelectric element 64 that undergoes extension and contraction by application of an AC voltage. The first piezoelectric element 62, the reinforcing plate 63, and the second piezoelectric element 64 are laminated in this order. The vibrating element 6 is fixedly mounted on the driven element 5 in a state where the contact portion 66 abuts on the contacted element 51. Further, the vibrating element 6 receives reaction force from the contacted element 51 when the vibrating element 6 vibrates so that the driven element 5 is rotated together with the vibrating element 6 by means of the reaction force.

The invention discloses a K-shaped linear ultrasonic motor based on the theory of a continuous amplitude transformer, belonging to the field of ultrasonic motor. The motor comprises a stator and a rotor; wherein, the rotor is a linear guide way; the stator consists of two Langevin oscillators, center lines of which are crossed; each Langevin oscillator consists of a front end (41), a rear end (61), a piezoelectric ceramic chip (31) and corresponding electrode plates (51); the head parts of the two Langevin oscillators are connected into a whole to form a driving leg (42); the linear guide way and the two Langevin oscillators are arranged in the same plane and form a K-shaped structure. The invention is characterized in that the Langevin oscillators are in the rod structure; the section of the rod is a continuous section that is gradually reduced from the rear end (61) to the front end (41). The linear ultrasonic motor of the invention has the advantages of simple structure, high output power, fast operating speed and high output efficiency.

There is disclosed a piezoelectric element having, on a substrate, a piezoelectric body and a pair of electrodes which come in contact with the piezoelectric body, wherein the piezoelectric body consists of a perovskite type oxide represented by the following formula (1):

(Bi,Ba)(M,Ti)O₃  (1)

in which M is an atom of one element selected from the group consisting of Mn, Cr, Cu, Sc, In, Ga, Yb, Al, Mg, Zn, Co, Zr, Sn, Nb, Ta, and W, or a combination of the atoms of the plurality of elements.

A camera lens module comprises an image sensor, a lens assembly arranged on an optical axis of the image sensor, a rotator rotatably mounted to surround one part of the lens assembly, a piezoelectric motor mounted to surround the other part of the lens assembly, for providing a driving force for rotating the rotator and a threaded section formed on the lens assembly and the rotator, wherein the threaded section converts rotation of the rotator into linear movement of the lens assembly along the optical axis of the image sensor to adjust a focal distance of the lens assembly. Since the piezoelectric motor is employed as a driving source for auto-focusing, miniaturization can be advantageously attained, whereby the camera lens module having an auto-focusing device can be easily mounted to a digital camera as well as a mobile communication terminal.

The piezoelectric dual-syringe insulin pump includes a single piezoelectric motor configured to pump insulin. The pump is controlled by a single controller. The pump uses two insulin reservoirs (in the form of two syringes), one of which is filled with a rapid-acting insulin, the other reservoir being filled with slow-acting insulin (providing the basal function). Both syringes are alternately actuated by a single PZT linear motor (particularly, a squiggle motor), depending upon polarity of the voltage applied to the motor, and feed into a common infusion line to the patient. The device includes an LCD display, audio alarm, controller, keypad, USB port, and a micro-energy harvesting circuit for recharging an on-board battery.

An ultrasound system having a transducer probe unit including at least one transducer for transmitting and receiving ultrasonic signals, wherein the transducer is moved with respect to the probe unit in a repetitive motion by an ultrasonic motor.

Real time high speed high resolution hyper-spectral imaging. (a) electromagnetic radiation collimating element (16), collimating electromagnetic radiation (44) emitted by objects (12) in a scene or a sample (14); (b) optical interferometer (18), receiving and dividing collimated object emission beam, generating interference images, and piezoelectrically determining and changing magnitude of optical path difference of divided collimated object emission beam; optical interferometer (18) includes: beam splitter (20′), fixed mirror (22), movable mirror (24), piezoelectric motor (26), displacing movable mirror (24) along axis (60), distance change feedback sensor (28), sensing and measuring change in distance of movable mirror (24) along axis (60), piezoelectric motor controller (30), actuating and controlling piezoelectric motor (26); and thermo-mechanically stable optical interferometer mount (32A); (c) camera optics (34), focusing interference images of each optical path difference; (d) detector (36), recording interference images; processing unit (38), and (f) display (40).

A capsule endoscope includes an enclosure with a transparent section, a illumination unit arranged to illuminate an object to be observed via the transparent section, an image unit disposed in the enclosure, a reflecting unit disposed in the enclosure and arranged to direct light from the object to the image unit to form an image of the object, and a driving unit comprising a piezoelectric motor arranged to rotate the reflecting unit relative to the enclosure.

A piezoelectric drive motor especially well adapted for use with flow control systems on commercial aircraft, military aircraft and spacecraft. In one embodiment, the apparatus includes a support structure that supports a piezoelectric beam. A biasing element, for example a coil spring, is coupled between a free end of the piezoelectric beam and the support structure. The spring exerts a compressive force on the beam and serves to amplify its displacement when electric signals applied to piezoelectric layers on the beam cause deflection of the beam between two stable positions. The drive motor operates over a wider band of drive frequencies than conventional piezoelectric beams and is also suitable for use as a sensor and in a wide variety of actuator applications.

The invention discloses a ternary alloy hyperacoustic motor frictional material of the fire resistance resin modified polyphenyl ester, which solves the low friction coefficient problem, the low impact strength problem, the low abradability problem and the bad processability problem of the prior hyperacoustic motor. The invention is made by 5-25% politef, 5-20% fire resistant resin and the rest polyphenyl, which can also add one or a plurality of 10-35% fortifying fiber, 1-15% metal powder and 1-15% ceramic powder. The invention keeps all the advantages of the present polyphenyl ester plastic alloy hyperacoustic motor frictional material, which is provided with the high friction coefficient, the good abradability, the low noise, the high hardness and the high impact strength.

A vibrator of a beam type linear ultrasonic motor using bending vibration modes belongs to the technical field of piezoelectric ultrasonic motors and is used for the piezoelectric ultrasonic motors. The vibrator solves the problem that the mechanical output capabilities of the ultrasonic motors are restricted because of low tensile strength and low electromechanical coupling efficiency of ceramic materials in the prior art. The vibrator comprises two driving pads, two end covers, two insulating sleeves, two pairs of piezoelectric ceramics with polarization directions being thickness directions, a flange, two thin-walled beams and mounting bases; wherein, studs extend out from the end faces of the flange along the axis of the flange; each stud is sleeved with a pair of piezoelectric ceramics; an end cover is screwed at the overhanging end of each stud; the tail end of each end cover is provided with a driving pad; each piezoelectric ceramic is composed of two symmetrical half piezoelectric ceramics which are combined after being split; the polarization directions of the two half piezoelectric ceramics are opposite; the splitting lines of the two pairs of piezoelectric ceramics at both sides of the flange are vertical to each other; the polarization directions of the piezoelectric ceramics in each pair are opposite.

A medical robot for use inside a magnetic resonance imager includes a horizontal motion assembly, a vertical motion assembly and a controller. The horizontal motion assembly includes a motion joint, an ultrasonic motor operably connected to the motion joint and an encoder operably connected to the ultrasonic motor. The motor and encoder are positioned proximate to the joint of the horizontal motion assembly. The vertical motion assembly is operably connected to the horizontal motion assembly and it includes a motion joint, an ultrasonic motor operably connected to the motion joint and an encoder operably connected to the ultrasonic motor. The motor and encoder are positioned proximate to the joint of the vertical motion assembly. The controller is operably connected thereto and is adapted to be powered off when the magnetic resonance imager is being used to collect images. A medical instrument assembly is connectable to the medical robot.