1687 results about "Electromagnetic drive" patented technology

The present invention relates to a scanning system optimized for lidar that includes a nodding mirror, a rotary electromagnetic drive, a rotary optical encoder, and control circuitry. The rotary electromagnetic drive includes a yoke incorporating a permanent magnet, and an arm having a coil at one end of the arm. The coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate. The rotary optical encoder produces an output signal in response to rotation of the nodding mirror, which serves as feedback to the control circuitry. The control circuitry adjusts the current provided to the rotary electromagnetic drive in response to the output signal, such that the nodding mirror rotates in a reference scan pattern.

To provide an aircraft propulsion system which can secure the optimum thrust and thrust vector for flight conditions, as well as the optimum sectional area for the engine, and which is highly compatible with the environment. An electrical generator is coupled to a turbofan engine, the electrical generator is driven by output power of the turbofan engine to output electric power, and an electromagnetic driving fan is driven by the electric power. On the other hand, after bringing each of coils in the electromagnetic driving fan to a superconductive state, liquid hydrogen is introduced to a heat exchanger, collects the energy of exhaust as heat, is then vaporized, and thereafter supplied to a combustor and to a fuel cell. Further, the electromagnetic driving fan is changed in its rotational phase by a rotating mechanism portion, is made movable in a width direction of a wing and a wing chord direction by a slide mechanism portion, and can be stored inside or outside the wing by a storage mechanism portion.

A haptic panel apparatus is disclosed that enables an operator to sense movement of a touch panel through touch when an input is made. The touch panel is accommodated within a base member, and an electromagnetic drive mechanism is provided between the touch panel and the base member. When the operator operates the touch panel with his / her fingertip and an input is made, the electromagnetic drive mechanism is driven to induce the touch panel to recede. In turn, the operator senses the receding of the touch panel through his / her fingertip to recognize that an input has been properly made.

An electromagnetic lens driving device includes a casing, a lens module, a positioning structure, and an electromagnetic driving module. The lens module is provided in a receiving space defined in the casing. The positioning structure, which is connected between the lens module and the casing, is configured to limit the lens module within the receiving space and generate a frictional force. The electromagnetic driving module is provided in the receiving space and corresponds in position to the lens module. When supplied with electricity, the electromagnetic driving module generates a magnetic force that drives the lens module to move along a central axis. Once the electricity is cut off, the lens module is fixed in position and prevented from moving freely by the frictional force of the positioning structure; hence, the electromagnetic lens driving features economical use of electricity.

The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component (14) which encloses a stationary shaft (12), which in turn is connected at both its ends to axially aligned bearing parts (16; 18) that are fashioned such that they form capillary sealing gaps (32; 34), a recirculation channel (28) filled with bearing fluid that connects the remote regions of the bearing to each other, and an electromagnetic drive system (42, 44) for driving the rotor component.

An apparatus and method for making a microscopic paddle wheel coupled inductively by an external electromagnet and used for valving and active pumping so that the actual pumping mechanism is completely isolated from the electromagnetic driver. The paddle wheel is inexpensive to manufacture and disposable. A cartridge having a network of conduits and reservoirs contains several of such paddle wheels to transport blood and reagents. A point-of-care device houses the electromagnetic driving mechanism and is reused with successive cartridges since the paddle wheels are contained by the cartridge and do not contaminate the driving mechanism.

A pumping system for assisting either or both ventricles of the heart. In one embodiment, separate devices are provided for each ventricle. In another embodiment, one device provides both right and left pumping. The pumping system is small, efficient, atraumatic, and fully implantable. In addition, the pumping system can provide pulsatile flow during systole. The ventricular assist device includes an actuator plate between a pair of serially connected pumping chambers that operate in a two-stroke mode, specifically a power stroke and a transfer stroke. The ventricular assist device also includes an electromagnetic drive system that provides adjustment to the pump pressure according to the current through an electromagnet. For the pumping system, springs provide a “spring force” on the actuator plate that is towards the high-pressure pump chamber. The bias force allows the springs to store and deliver energy from the electromagnetic drive system to provide better utilization of the pump components, and to reduce the pump size and consumption of electricity.

An electromagnetic driven membrane pump has a pump housing inside which at least one pump chamber (15) having at least one intake and outlet is formed and delimited between a gable (1) of the pump housing and at least one completely-sealed membrane (14) attached to a wall (4) of the pump housing and, in an axial direction of the pump housing, to a running axle (13) suspended in at least two separated suspensions in a longitudinal direction of the axle (13). At least one of the suspensions is composed of a flat spring (9) attached to the axle (13) in a radial direction out toward the wall (4) of the pump housing. The axle (13) is composed of magnetic material to be driven by a magnetic field from an electromagnet (7) for oscillation in its longitudinal direction and moving the membrane (14) in corresponding oscillating movement. The flat spring (9) is composed of an inner and at least one outer part, with the inner part attached to the axle (13) and the outer part(s) attached to the pump housing. These parts are connected with one another by two elastic legs, arranged at each side of the point where the spring is attached to the axle (13).

An electronic device (100) includes an actuation element (106) configured to alter an actuation element profile (108) of the actuation element (106) with respect to a housing (102) in response to a device event (110). Altering the actuation element profile (108) may include distally extending or changing the form factor of the actuation element (106). Device events, for example where the electronic device (100) is a radiotelephone (300), may include receipt of an incoming communication (310). When such an event occurs, the actuation element profile (108) of a call activation key (306) is altered. In response to the actuation element profile (108) being altered, a user (620) is alerted to the incoming communication (310). Shape memory alloy elements such as martensite, actuation element profile drivers such as electromagnetic driver (700), or actuation element profile motors such as a cam and follower motor (800) a may additionally be used to alter the actuation element profile (108).

The invention relates to an axial flow blood pump device comprising an integrated electromagnetic drive with a stationary stator assembly and a rotatable impeller assembly, wherein the stationary stator assembly at least comprises stator windings (3) and a bearing system (4) supporting the rotatable impeller assembly, the impeller assembly comprising at least one blade (9) and permanent magnets (10) interacting with the stator windings (3), wherein the stationary stator assembly comprises supporting elements (8) for mounting, in particular coaxially mounting the device in the interior of an anchoring system (7) being implantable into a vessel. The invention furthermore relates to a system comprising a device according to any of the preceding claims and a anchoring system (7), in particular a stent (7) surrounding the device, wherein the anchoring system (7) and the device, in particular the at least one blade (9) and the supporting members (8) of the device are in a collapsed / compressed / folded state for implanting the system into a vessel, the system being expandable / unfoldable after implantation.

An electromagnetic drive causes a cantilever of a probe-based instrument to deform flexurally by transmitting a high frequency AC signal through an electromagnetic actuator located in the vicinity of the cantilever. The AC signal preferably is an RF carrier signal having a frequency that is substantially higher than the resonant frequency of the cantilever. The carrier signal may, if desired, be modulated with a lower frequency modulation signal to induce the cantilever to oscillate, preferably at resonance. Alternatively, the carrier signal may be transmitted to the electromagnetic actuator without being modulated in order to deflect the cantilever quasi-statically. Cantilever response can then be monitored either directly in response to the imposition of the electromagnetically induced deformation of the cantilever in response to probe / sample interaction to obtain measurements regarding characteristics of the sample, the environment, and / or the cantilever.

In one embodiment, a system for locating a transverse hole disposed at a predetermined location in a surgical implant inserted into a fractured bone of a patient and for drilling the fractured bone coaxially with the transverse hole is provided. The system comprises a first electromagnetic sensor unit coupled to the surgical implant, a surgical instrument for drilling a hole through the fractured bone coaxially with the transverse hole, the surgical instrument having a main axis disposed in parallel to the axis of the transverse hole, an electromagnetic drive unit coupled to the surgical instrument for energizing the first electromagnetic sensor unit to transmit a signal, a second electromagnetic sensor unit configured for receiving the signal and a display unit for converting the signal into visual signals enabling a user to change the position of the surgical instrument to align the surgical instrument with the transverse hole of the surgical implant.

An anti-shake device for use in an optical system comprises a biaxial rotating element and a electromagnetic driving module. The biaxial rotating element is made by grooving a thin resilient plate to form a special multiple-frame structure. The biaxial rotating element, when driven by the electromagnetic driving module, makes limited pivotal movement about two axes so as to provide shake compensation. The electromagnetic driving module, composed of a plurality of permanent magnets and a plurality of coils, is supported and positioned by an inner support frame and an outer support frame, both of which have uniquely designed structures. The resultant anti-shake device is structurally simple, easy to assemble, compact in size, and relatively low-cost.

A flow-metering valve for metering a flow of liquid has a valve member, a stopper and an electromagnetic driving member. The valve m ember is reciprocally displaceably arranged between a first position and a second position in the liquid chamber. The stopper is arranged at the second position in the liquid chamber. The electromagnetic driving member generates a magnetic attractive force between the valve member and the stopper to hold the valve member at the second position when the electromagnetic driving member is energized.

The invention discloses a 6 freedom degree micromotion bench in ultra precise processing and testing device technical domain, which is characterized by the following: possessing three groups of electromagnetic driving units; arranging in horizontal plane; driving the micromotion bench to X, Y, theta z3 freedom degree move in horizontal plane; arranging three electromagnetic driving units along vertical direction; driving the micromotion bench to Z, theta x and theta y3 freedom degree move. This invention possesses simple structure and higher displacement distinguishability, which can be used to realize 6 freedom degree motions for ultra precise process and check.

A haptic panel apparatus is disclosed that enables an operator to sense movement of a touch panel through touch when an input is made. The touch panel is accommodated within a base member, and an electromagnetic drive mechanism is provided between the touch panel and the base member. When the operator operates the touch panel with his / her fingertip and an input is made, the electromagnetic drive mechanism is driven to induce the touch panel to recede. In turn, the operator senses the receding of the touch panel through his / her fingertip to recognize that an input has been properly made.

An external component for a bone conduction hearing implant is described. An external housing is fixedly attached on the skin of a hearing implant patient over an implanted bone conduction hearing transducer. An electromagnetic drive coil arrangement is fixed within the external housing for conducting electrical current to develop electromagnetic drive signals. An attachment magnet arrangement is suspended with the external housing by a flexible spring arrangement and magnetically coupled to the drive coil arrangement and to a corresponding implant magnet arrangement within the implanted bone conduction transducer. The electromagnetic drive signals magnetically interact with the attachment magnet arrangement which reacts by vibrating on the spring arrangement and magnetically interacting with the implant magnet arrangement to generate a bone conduction vibration signal by the implanted bone conduction hearing transducer for perception by the patient as sound.

An electromagnetic driving apparatus includes a magnet member having a first face in which first and second magnetic poles are formed in a first direction and a second face in which the first and second magnetic poles are formed in a second direction, a first coil facing the first face, a second coil facing the second face, a first member holding the magnet member, and a second member holding the first and second coils. One of the first and second members holds a driven member. The first and second members are relatively moved in the first direction by the energization of the first coil, and the first and second members are relatively moved in the second direction by the energization of the second coil. The actuator constituted by the first and second coils and the magnet member can be compactly arranged in one region in the apparatus.

An implantable hearing prosthesis for a recipient patient is described. An implantable signal transducer includes one or more electromagnetic drive coils for receiving an electrical stimulation signal and a cylindrical transducer magnet arrangement including an inner disk magnet having a first magnetic field direction, and an outer annular magnet surrounding the inner rod magnet and having a second magnetic field direction opposite to the first magnetic field direction. Current flow through the one or more electromagnetic drive coils from the electrical stimulation signal creates a coil magnetic field that interacts with the magnetic fields of the transducer magnet arrangement to create vibration in the transducer magnet which is developed by the signal transducer as a mechanical stimulation signal for audio perception by the patient.

The invention discloses an intelligent drug cabinet monitoring system based on Internet of Things. The intelligent drug cabinet monitoring system comprises an upper computer monitoring subsystem, a man-machine interaction subsystem and a lower computer monitoring subsystem, wherein the upper computer monitoring subsystem comprises a master control computer and an HIS center server in network connection with the master control computer, the man-machine interaction subsystem comprises a fingerprint identifier, a password reader, a touch screen and a voice module, the lower computer monitoring subsystem comprises a microcontroller, a drawer video monitoring module, a prompting module, an RFID acquisition module, a temperature and humidity acquisition module, a weighing module, an electromagnetic driving module and a drawer communication module. The intelligent drug cabinet monitoring system can detect drug change information in the cabinet in real time, drug administration is achieved through login authentication of a user, the problem of difficult standardized, scientized and refined management drug management in a hospital is effectively solved, and the drug use safety and management work efficiency are greatly improved. In addition, the invention also discloses a monitoring method for the intelligent drug cabinet monitoring system based on Internet of Things.

The invention relates to a control circuit (2) for an electromagnetic drive. Said circuit contains first and second electronic switching elements (16 to 22), which in conjunction with a timing element (12) subject the drive coil (4) to a corresponding direct current in the starting phase or in the maintenance phase. A starting current (Ua) and a maintenance current (Ub) are provided by means of a current source (14) that is controlled by the timing element (12) and a direct current converter (10) with downward control.

The invention relates to a double-wing type insect-like air vehicle, belonging to the technical field of micro air vehicles. The double-wing type insect-like air vehicle comprises four wings, permanent magnets, spiral coils, a control module, an air vehicle body, four carapaces, L-shaped chests and flexible hinges, wherein the permanent magnets and the spiral coils are corresponding to the four wings, and the L-shaped chests and the flexible hinges are corresponding to the four carapaces; the four wings are respectively bonded at the B ends of the four carapaces; the spiral coils and iron cores are bonded on the surface of the L-shaped chest along the D end; the four permanent magnets are respectively bonded on the surface of the carapaces opposite to the spiral coils and the iron cores; the axial lines of the permanent magnets, the iron cores and the spiral coils are coincident; the four L-shaped chests are fixedly arranged in the air vehicle body; the flexible hinges are respectively connected with the L-shaped chests and the carapaces; and the control module is installed at the center of the air vehicle body and is respectively connected with the four spiral coils. In the invention, each wing is directly driven by the electromagnetic force of an electromagnetic driver, thus each wing has simple structure and can be controlled conveniently and flexibly; the change frequency and the acting direction of the driving force can be changed by changing the frequency, the time sequence and the amplitude value of exciting pulse; and the main structure of the air vehicle is processed by adopting the MEMS technology, thus the miniaturization of the air vehicle can be realized easily.

A system and method control intake air of an internal combustion engine. The engine has at least one combustion chamber provided with intake valves together with an intake manifold provided with a throttle valve. The opening and closure timings of the intake valves are adjustable entirely independently by electromagnetic drivers from the crankshaft position to control the amount of intake air supplied to the combustion chamber. The system and method provide a response adjustment to variable valve timing and throttle valve position controls of the intake valves for unthrottled intake air control.