2075results about "Dynamo-electric machines" patented technology

A blood pressure monitoring system, comprising: an exciter configured to produce an acoustic signal, the exciter being provided on a first substrate portion; a detector spaced apart from the exciter, the detector being configured to detect the acoustic signal and to produce an electrical output signal, the detector being provided on a second substrate portion that is mechanically or acoustically decoupled from the first substrate portion, wherein the detector comprises at least four detectors; and a processor configured to determine a blood pressure measurement from the electrical output signal.

The invention discloses a high-temperature steam pipeline stress-strain state monitoring system based on characteristic safety parameters. The high-temperature steam pipeline stress-strain state monitoring system comprises a sensor acquisition module, a data processing module, a wireless communication module, an energy acquisition module, an edge calculation module, a fault self-diagnosis module and a server. The sensor acquisition module acquires first sensing information through a heterogeneous sensor combination distributed on the surface of a pipeline, and the data processing module extracts stress concentration coefficient, strain rate, temperature gradient and vibration frequency characteristic parameters. And the wireless communication module adopts a multi-hop network mode to transmit data to the edge calculation module for secondary processing to obtain pipeline operation information. The energy acquisition module acquires energy from the pipeline surface to supply power to the sensor. And the fault self-diagnosis module realizes abnormal device positioning isolation through cross validation and link bit error rate analysis. The server comprehensively receives various kinds of information to complete continuous monitoring of the pipeline state, and a complete self-powered intelligent monitoring system is formed.

Power tools that include a housing, a motor supported by the housing, an inverter positioned between and electrically connected to a battery pack interface and the motor, a gate driver connected to the inverter, a rotational position detector configured to detect a position of the motor, a controller configured to control the gate driver, and a short circuit detection circuit. The short circuit detection circuit is configured to monitor the current in the inverter, compare the current in the inverter to a first current threshold, determine, in response to the current in the inverter being greater than or equal to the first current threshold, whether the position of the motor is changing based on a signal from the rotational position detector, and control, in response to the position of the motor not changing, a switch of the short circuit detection circuit to disable the gate driver.

The invention discloses a lens driving device and a camera module. The lens driving device comprises: a base; the frame is movably arranged on the base; the carrier is used for carrying the optical lens, and the carrier is movably arranged on the frame; the lens driving assembly is configured to drive the carrier to move relative to the base along a first direction and a second direction perpendicular to the first direction; the focusing position sensing assembly comprises a focusing position sensing element and a focusing position sensing magnet which are oppositely arranged along the first direction; the anti-shake supporting part is arranged between the frame and the base in the second direction, the anti-shake supporting part is suitable for supporting the frame on the base, the anti-shake supporting part comprises at least three anti-shake balls, and seen in the first direction, one anti-shake ball and the focusing position sensing magnet are at least partially overlapped. In this way, the performance of the lens driving device is optimized.

A movable body wherein a pair of annular yokes including an opening at a center and a pair of weight parts including a through hole are stacked on a front and rear surfaces of a magnet having a circular plate shape in an axis direction, and another end portion of a connecting part that connects a pair of elastic support parts on one end portion side is disposed in the contiguous opening and through hole; and a fixing body wherein the movable body is housed in a cylindrical part, the movable body is supported with the pair of elastic support parts so as to be allowed to vibrate back and forth in the axial direction, and a pair of annular coils disposed radially outside the movable body is provided are provided, and the movable body is vibrated in the axial direction through energization of the coil.

The invention discloses a lens driving device and a camera module. The lens driving device comprises: a base; a frame, wherein the frame is movably arranged on the base; the carrier is used for bearing an optical lens, and the carrier is movably arranged on the frame; the lens driving assembly is configured to drive the carrier to move relative to the base along a first direction and a second direction perpendicular to the first direction, and the lens driving assembly comprises a driving magnet part and a driving coil part arranged opposite to the driving magnet part; and a focusing position sensing assembly, and the focusing position sensing assembly and the driving magnet part are arranged at different sides of the lens driving device. In this way, the performance of the lens driving device is optimized.

An optical element driving mechanism is provided. The optical element driving mechanism includes a movable part, a fixed part, and a driving assembly. The movable part connects an optical element. The movable part may move relative to the fixed part. The driving assembly drives the movable part to move relative to the fixed part.

An optical member driving mechanism is provided. The optical member driving mechanism includes a movable portion, a fixed portion, and a driving assembly. The movable portion is configured to connect an optical member, and is movable relative to the fixed portion. The driving assembly is configured to drive the movable portion to move relative to the fixed portion.

The invention relates to the technical field of motors, in particular to a Hall support and a coreless brushless motor, and a Hall plate is embedded in one side of a support body; a Hall plate mounting groove is formed in one side of the support body, at least two positioning columns are arranged in the Hall plate mounting groove, positioning holes matched with the positioning columns are formed in the Hall plate, and the positioning columns are inserted into the positioning holes; a Hall device is arranged on the Hall plate, a device groove matched with the Hall device is arranged in the Hall plate installation groove, and the Hall device is embedded in the device groove. Compared with the prior art, the Hall bracket and the coreless brushless motor have the advantages that a Hall device and a circuit welding point are effectively protected and isolated through a unique bracket structure design, and an enameled wire led out of a winding wire cup is prevented from being in contact with a PCB outgoing line welding point when the Hall position is adjusted, so that the risk of short-circuit damage of a Hall PCB is reduced, and the service life of the Hall device is prolonged. The reliability and stability of the motor are improved, and the problem of potential short circuit risk existing in the Hall alignment process in the prior art can be effectively solved.

The invention discloses a lens driving device and a camera module. The lens driving device comprises: a base; a frame, wherein the frame is movably arranged on the base; the lens driving assembly is used for driving the frame to move relative to the base, and the lens driving assembly comprises a driving magnet part; an anti-shake support part; the anti-shake magnetic attraction part and the driving magnet part are in mutual magnetic attraction, the anti-shake magnetic attraction part is used for attracting the frame to the base so that the frame can be supported on the top face of the base through the anti-shake supporting part, and the anti-shake supporting part comprises at least three anti-shake balls. Any two anti-shake balls in the at least three anti-shake balls serve as bearing shafts, and the moment of magnetic attraction force between the anti-shake magnetic attraction part and the driving magnet part on the frame is larger than the moment of gravity of the frame and other camera module components supported by the frame on the frame.

The invention belongs to the technical field of electromagnetic induction and friction nanometer power generation, and particularly relates to a vibration energy collector based on electromagnetic induction and friction nanometer hybrid power generation. Comprising a friction nanometer power generation unit and an electromagnetic induction unit. The friction nanometer power generation unit comprises an upper insulating support plate, a lower insulating support plate and a friction pair; the friction pair comprises an upper friction assembly and a lower friction assembly, and the upper friction assembly and the lower friction assembly trigger the contact and separation process through external vibration to achieve friction electricity generation. The electromagnetic induction unit comprises a coil, a magnet and a steel body which are sequentially nested, the coil and the magnet are fixedly connected with the upper friction assembly and the lower friction assembly respectively, the steel body is fixedly connected with the lower insulation supporting plate, the magnet and the steel body form a closed magnetic circuit, and the magnet and the coil trigger relative movement through external vibration to achieve electromagnetic power generation. The device is novel in structure and distinct in gradation, integrates a triboelectrification effect and an electromagnetic induction principle, has high-voltage output and high-current characteristics, and can efficiently realize continuous conversion from environment vibration energy to electric energy.

A power transmission line vibration energy collection device based on a triboelectricity-electromagnetic effect belongs to the technical field of power transmission line self-powered equipment, and comprises a shell, a wire clamp device, a triboelectricity unit, a vibrator structure and a cantilever beam structure, and can collect multi-frequency and multi-amplitude vibration energy of a power transmission line in the vertical direction. And the cantilever beam-magnetic coupling structure is adopted to improve the low-order modal frequency, so that the vibration frequency response range of the self-powered device is widened, and the self-powered device has the following advantages that 1, efficient low-frequency energy collection is realized, and the vibrator structure can effectively collect low-frequency vibration energy by virtue of the gravity of the vibrator structure and the action of the supporting spring; 2, the fatigue resistance is excellent, and the cantilever beam does not directly participate in excitation of the triboelectric energy harvesting unit, so that the risk of fatigue fracture of the cantilever beam is effectively reduced; and 3, the energy collection capability of the device is improved, and friction electricity energy harvesting and electromagnetic energy harvesting are combined, so that the collection efficiency of high-frequency excitation energy can be further improved.

The invention relates to a lens driving module and a camera module. The lens driving module is used for bearing an optical lens and comprises a base; the lens carrier is movably arranged on the base; the driving assembly is configured to drive the lens carrier to move relative to the base; the correction assembly comprises correction magnets and correction magnet yokes, one of the correction magnets and the correction magnet yokes is arranged on the lens carrier, the other correction magnet yoke is oppositely arranged on the base in the first direction parallel to the optical axis of the optical lens, and each correction magnet yoke comprises a first correction magnet yoke and a second correction magnet yoke which are arranged at intervals in the width direction of the lens carrier; the length of the first correction magnet yoke is larger than that of the second correction magnet yoke, the projection area of the first correction magnet yoke on the correction magnet in the first direction is larger than that of the second correction magnet yoke on the correction magnet in the first direction, and the center line of the correction magnet penetrates through the first correction magnet yoke. The influence of deflection torque on the movement of the lens carrier is reduced.

A camera may include a tilt actuator having one or more tilt magnets and one or more tilt coils. The tilt actuator may detect unexpected tilt between one or more lenses and an image sensor of the camera. The tilt actuator may control current of the tilt coils to interact with magnetic fields of the tilt magnets to generate motive force to rotate the lenses relative to the image sensor around one or more axes to compensate for the detected tilt. In addition, the tilt coils and tilt magnets may interact to move the lenses relative to the image sensor along an optical axis of the lenses to adjust a focus of the camera.

The invention provides a multi-mode triple composite vibration energy acquisition device based on a frequency division technology and a self-powered sensing system. The multi-mode triple composite vibration energy acquisition device comprises a shell, an electromagnetic power generation element, an elastic piezoelectric power generation element and a friction nano power generation element, the electromagnetic power generation element comprises a magnet vibrator and a coil, electromechanical coupling control switches are arranged on the two sides of the magnet vibrator respectively, and each electromechanical coupling control switch is connected with one side of the magnet vibrator through a first elastic unit and an inerter which are connected in parallel. A coil is arranged on the shell on the outer side of the magnet vibrator, and electric energy is generated through reciprocating motion of the magnet vibrator; a friction nanometer power generation element is arranged between the magnet vibrator and the electromechanical coupling control switch, and electric energy is generated by changing the distance between the magnet vibrator and the electromechanical coupling control switch; and an elastic piezoelectric power generation element is arranged between the electromechanical coupling control switch and the wall surface of the shell. Automatic switching of electromagnetic power generation, friction power generation and piezoelectric power generation can be realized under excitation of different frequencies.

The invention relates to an axial flux electric pump. An axial magnetic flux electric pump having an axially symmetrical structure includes: a stator assembly configured to generate an axial magnetic flux; the rotor driver assembly and the stator assembly are coaxially arranged, the rotor driver assembly can rotate around the axis under the action of the axial magnetic flux, and when the axial magnetic flux electric pump works, the rotor driver assembly drives fluid and bears opposite fluid acting force; wherein the axial symmetrical structure is realized by one of the following two modes: the stator assembly comprises a first stator and a second stator which are respectively positioned on two axial sides of the rotor driver assembly; or, the rotor driver assembly comprises a first rotor driver and a second rotor driver which are located on the two axial sides of the stator assembly respectively.

According to the present invention there is provided an active vibration control system comprising: an electromagnetic actuator and a control element, the electromagnetic actuator being operable to apply a force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said force, wherein the electromagnetic actuator and control element are relatively moveable such that the active vibration control system has at least two modes of vibration, and wherein movement of the electromagnetic actuator causes movement of at least a part of the control element.

A sensor shifting module includes a fixed body, a first body movably disposed in the fixed body, a second body movably disposed in the first body and coupled to an image sensor having an imaging plane facing a first direction, a first driver configured to move the second body in a direction orthogonal to the first direction with respect to the first body, a second driver configured to rotate the second body about an axis parallel to the first direction with respect to the first body; and a third driver configured to rotate the first body about an axis orthogonal to the first direction with respect to the fixed body.

The invention discloses a driving device and a camera module, and the driving device comprises a first frame which carries an optical element, and the optical element is provided with an optical axis; the first frame is movably arranged on the second frame; the at least one first driving assembly is suitable for driving the first frame to move in the direction perpendicular to the optical axis relative to the second frame, the first driving assembly comprises at least one anti-shake coil and at least one anti-shake magnet which are oppositely arranged, one of the anti-shake coil and the anti-shake magnet is arranged on the first frame, and the other one is arranged on the second frame; the anti-shake coil comprises a first effective section and a second effective section, the first effective section and the second effective section are arranged on the two adjacent sides of the anti-shake magnet respectively, when the anti-shake coil is powered on, the first effective section and the anti-shake magnet generate first driving force, and the second effective section and the anti-shake magnet generate second driving force. The first driving force and the second driving force jointly drive the anti-shake coil and the anti-shake magnet to generate relative displacement in the direction perpendicular to the optical axis.

The present invention involves method and system for contactless bidirectional transfer of power between DC source (3700) and rotor coils of electric motor-generator by simultaneous bimodal capacitive and inductive power transfer of high frequency power signals from resonators (3545) stationary with respect to the motor-generator stator to resonators (3585) on the motor-generator rotor according to an adjustable transfer mode ratio at a variable resonant power signal oscillation frequency. Power from DC source is converted into high frequency power signals by high frequency continuous auto-adjusting bimodal stator transmitter-receiver modules under control of systems controller (3572) and provided to corresponding one or more high frequency stator resonators. High frequency power signals received by high frequency rotor resonators are converted in corresponding high frequency auto-adjusting bimodal rotor transmitter-receiver modules to electrical signals to provide to drive circuitry of induction coils on rotor.

The invention relates to a lens driving module and a camera module. The lens driving module is used for bearing an optical lens and comprises a base; the lens carrier is movably arranged on the base; the driving assembly is configured to drive the lens carrier to move relative to the base; the correction assembly comprises correction magnets and correction magnet yokes, one of the correction magnets and the correction magnet yokes is arranged on the lens carrier, the other correction magnet yoke is oppositely arranged on the base in the first direction parallel to the optical axis of the optical lens, and each correction magnet yoke comprises a first correction magnet yoke and a second correction magnet yoke which are arranged at intervals in the width direction of the lens carrier; the length of the first correction magnet yoke is larger than that of the second correction magnet yoke, the projection area of the first correction magnet yoke on the correction magnet in the first direction is larger than that of the second correction magnet yoke on the correction magnet in the first direction, and the center line of the correction magnet penetrates through the first correction magnet yoke. The influence of deflection torque on the movement of the lens carrier is reduced.

A portable electronic device may include an enclosure defining an interior cavity and having a front cover, and a haptic engine positioned in the interior cavity. The haptic engine may include a first body component defining a first side of the haptic engine and including a first spring flexure and a first end element molded over a portion of the first spring flexure, a second body component defining a second side of the haptic engine opposite the first side and including a second spring flexure and a second end element molded over a portion of the second spring flexure, a movable mass component coupled to the first spring flexure and the second spring flexure, and a coil configured to induce a linear movement of the movable mass component in response to the actuation signal thereby producing a haptic output.

The invention relates to a rotary actuator (1) comprising: - a stator (10), - at least one stator coil (11) which is connected to the stator (10) in such a way that a force acting on the stator coil (11) is transferred to the stator (10); - an armature (20) rotatable about an axis of rotation (2) relative to the stator (10), - at least one armature coil (21) which is connected to the armature (20) in such a way that a force acting on the armature coil (21) is transferred to the armature (20); - Power lines (3) through which at least one stator coil (11) can be energized, - Cable (4) through which the at least one armature coil (21) can be energized, - a rotation angle limiting device (5) by which rotation of the armature relative to the stator is limited to a rotation angle range of 0 to 359 degrees.

An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly and a first driving assembly. The movable assembly is movable relative to the fixed assembly. The first driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The optical element driving mechanism further includes a first opening, and an external light beam travels along a first axis to pass through the first opening.

The invention provides a multi-path vibration energy collection device, and the device comprises a mass block which can generate relative movement under the excitation effect; the piezoelectric cantilever beams are arranged on the two transverse sides of the mass block and used for responding to high-frequency micro-amplitude vibration energy; the permanent magnet assembly is fixed in the moving direction of the mass block and is matched with the induction coil to realize magnetoelectric energy conversion; the piezoelectric cantilever beam is connected with the bridge rectifier and the thyristor threshold trigger circuit 1, and the permanent magnet assembly is connected with the bridge rectifier and the thyristor threshold trigger circuit 2 to form a double-independent energy collection channel. The method has the following advantages: (1) a path orthogonal decoupling design is adopted, so that a structure and energy dual-independent acquisition path is realized; (2) the energy conversion efficiency is improved based on a coupling response mechanism of mass block inertia driving; and (3) a thyristor threshold triggering mechanism realizes micro-energy efficient conversion, and the output is stable and reliable.

The invention belongs to the technical field of vibration energy collection, and discloses a multi-dimensional vibration energy collection device integrated with a damper, which mainly utilizes the Faraday electromagnetic induction principle to realize the function of vibration power generation. When an automobile runs on a normal road, a magnetic ball in the collecting device provides an internal diffusion magnetic field, the magnetic ball irregularly vibrates in an inner cavity of a cup-shaped body, and magnetic flux changes in the moving process; the springs in the dampers surrounding the periphery of the collecting device rotate at a high speed through pawl-ratchet wheel transmission, so that induced electromotive force is generated in damper coils, and the two systems jointly complete conversion from mechanical energy to electric energy. When vibration is large under bumpy road conditions, the damper can fully play a damping role, the mechanical stress of the cup-shaped body in the vibration process is reduced, and the service life of equipment is prolonged. Through ingenious design, originally wasted vibration energy is converted into electric energy, and stable electric power support can be provided for various low-power-consumption devices.

The utility model relates to the technical field of motors, in particular to a coreless motor with a split type Hall plate, which comprises a motor body and the split type Hall plate arranged in the motor body. The split type Hall plate comprises a winding leading-out PCB, a connecting support and a Hall plate, the winding leading-out PCB is fixedly connected in the motor body, the Hall plate is connected to the connecting support, and the connecting support is connected to the winding leading-out PCB. Compared with the prior art, the coreless motor with the split type Hall plate can effectively solve the problems that the Hall plate of the existing coreless brushless motor has a short circuit risk of scratching a coil lead in alignment and is inconvenient to maintain.

The present invention discloses a superconducting motor quench detection method and apparatus based on rotational symmetry of a motor, belonging to the technical field of superconducting motor quench detection. The method includes: acquiring terminal voltages of each group of superconducting magnets in a superconducting motor, where the superconducting motor is pre-divided into at least two unit motors by using the rotational symmetry of the motor, and superconducting magnets located at corresponding positions are selected from the at least two unit motors as a group of superconducting magnets; calculating an absolute value of a terminal voltage difference of each group of superconducting magnets; and judging whether the absolute value exceeds a preset threshold, and if the absolute value exceeds the preset threshold, determining that the superconducting magnets are in a quench state. According to the present invention, induced voltages coupled by the terminal voltages of superconducting magnets are eliminated.

To suppress deterioration of the characteristics of a superconducting wire caused by local strain occurring in a superconducting coil.SOLUTION: A rotor 1 for a superconducting rotating electric machine includes a winding mounting shaft 10, a plurality of superconducting coils 20 arranged around the winding mounting shaft 10, and at least one inter-pole support member 40 that is provided on the outer surface of the winding mounting shaft 10 and between adjacent superconducting coils 20, is in surface contact with at least a portion of the peripheral surface of each superconducting coil 20, and supports the superconducting coils 20.SELECTED DRAWING: Figure 1

The invention relates to the technical field of power transmission line self-energy-taking, and discloses a power transmission line self-energy-taking device and a state detection system, and the device comprises a housing structure, a motion structure, an electromagnetic power generation structure, and a friction power generation structure. Wherein the moving structure is composed of a permanent magnet, a spring and a fixing groove, the vertical shell and the fixing groove are connected through the spring, and a spring mass vibration system is constructed; the electromagnetic power generation structure generates power through relative movement of a permanent magnet and a coil. The friction power generation structure generates power through sliding separation of sliding electrodes on the side faces of the fixing grooves and electrodes in the side shells. The invention further discloses a state detection system, vibration energy is collected through the device and stored in an energy storage battery through an energy management circuit to supply power to a sensor detection circuit, and data are sent to an upper computer through a wireless transmission module. The power transmission line state real-time detection without external energy supply can be realized, and the problem of power supply of monitoring equipment in remote areas is solved.