12 results about "Electromagnetic interaction" patented technology

The invention discloses an electromagnetic compatibility detection method and device of a rail transit signal system and electronic equipment, and relates to the technical field of electromagnetic safety. Determining an actual electromagnetic compatibility area corresponding to the equipment according to the actual distance between the actual installation positions of the multiple pieces of equipment of the rail transit signal system and a target reference line on a rail; and determining the electromagnetic interference risk condition between the relation pairs based on the electromagnetic interference information of the actual electromagnetic compatibility area corresponding to the equipment. According to the method, the electromagnetic interference scene of the actual rail transit signal system is analyzed to cover the random and coexisting electromagnetic interference combination of the field, so that the confidence coefficient of the risk assessment result in the complex electromagnetic environment of the field is improved, and the analysis is ensured to cover the random and composite scene which cannot be reproduced by the standard test; moreover, the electromagnetic interference risk condition between a relation pair formed by a plurality of devices in the rail transit signal system is determined, that is, systematic evaluation of complex electromagnetic interaction is realized through system-level analysis.

The present application relates to the technical field of laser precision machining, and particularly relates to a femtosecond laser five-axis machining tool and a cutter machining method. The femtosecond laser five-axis machining tool comprises a tool body, a clamping module, a laser module and an auxiliary positioning module. The first motion platform and the second motion platform in the clamping module move horizontally and perpendicularly through electromagnetic interaction. The clamp swings and rotates through mechanical driving. The laser generator in the laser module is connected to a dynamic focusing unit on the third motion platform. The third motion platform moves vertically through mechanical transmission. The dynamic focusing unit comprises a galvanometer assembly and a focusing assembly moving along an optical axis. The output beam is vertically downward. The auxiliary positioning module comprises an image acquisition unit and a contact measurement unit, which respectively acquire the cutter posture and the contact cutter reference point. The present application can effectively eliminate the backlash and focusing lag of the traditional screw transmission in the machining process, avoid manual clamping errors, and realize high-precision and high-consistency machining of complex curved surface cutters.

This invention relates to a human-machine interface tactile peripheral device, which includes a rotating finger wheel (250) comprising a human-machine interaction element directly driven by a rotating electromagnetic interaction component (10). The rotating electromagnetic interaction component includes a stator assembly (100) and a rotor assembly (200). The stator assembly has a plurality of coils (122, 123, 124) arranged on ferromagnetic teeth forming coil supports (132, 133, 134). The rotor assembly includes a magnet (210) having a plurality of axial magnetization poles (211). The position of the rotor assembly is determined by an angle sensor (300). The peripheral device also includes an electronic control circuit (430) that controls the amplitude of the current supplied to the coil based on the angular signal transmitted by the sensor and the tactile profile recorded in the memory (600) of the electronic control circuit, so as to transmit torque increased to or subtracted from the torque applied to the finger wheel by the user. The device is characterized by: • the stator being fixed and having at least two ferromagnetic teeth forming a coil support and extending axially toward the magnet; • a disc magnet having alternating axial magnetization that interacts with the ferromagnetic stator teeth.

The invention discloses a space propulsion method and device independent of sprayed substances, and relates to the technical field of space propulsion. The core innovation lies in that based on the asymmetry principle (time sequence asymmetry, space asymmetry and counter-acting force transfer characteristics) of electromagnetic interaction, the working medium-free propelling method is provided in combination with the structural design of an open-circuit coil. The method comprises the steps that a power supply system is constructed, a power supply coil and an open-circuit coil (working coil) which are highly coupled are arranged, an alternating magnetic field is excited through high-frequency current, and the working coil obtains current through induction; by means of the reaction force transfer characteristic, the reaction force is radiated in an electromagnetic field mode, the working coil outputs net force outwards, and direct conversion from electric energy to kinetic energy is achieved. The core feature of the working coil is an open circuit, can be U-shaped, annular or other shapes, and is of a multi-turn structure, but the number of turns is not fixed. The propulsion method and device are emphatically protected as an implementation carrier of the method, a working medium does not need to be carried, the total mass of the spacecraft is greatly reduced, power can be continuously obtained as long as an energy source exists, the problems that an existing propulsion technology depends on the working medium, and the endurance is limited are solved, and the power requirements of various spacecrafts are met.

The present application relates to the technical field of eddy current nondestructive testing, and discloses a force-magnetic synergistic defect detection device and method based on a triorthogonal GMR array, which comprises: a probe assembly for collecting a three-dimensional magnetic field component induced by a defect and a reaction force signal caused by electromagnetic interaction; a synchronous sampling module connected with the probe assembly for synchronously sampling the three-dimensional magnetic field component, the reaction force signal and a reference signal under a unified sampling clock and a synchronous triggering condition; a signal processing and inversion module for extracting a defect strike angle and a dip angle, inputting the defect strike angle and the dip angle into an inversion model to obtain a magnetic inversion depth, calculating a force constraint depth, and obtaining final defect parameters after consistent processing of the force constraint depth and the magnetic inversion depth. The device has the advantages of improving the stability and precision of defect detection, reducing noise interference, realizing more accurate defect parameter inversion, strengthening the physical correlation of subsequent feature fusion, and providing a reliable data basis for subsequent defect morphology inversion.

Described herein is a photonic motor comprising: a first optical waveguide arrangement adapted to guide at least one optical mode and form a stator (12); and an electromagnetic interaction device electromagnetically interacting with the optical modality, configured for rotation and forming a rotor (14), the electromagnetic interaction device comprising a plurality of optical resonators or a plurality of reflective metal structures or a combination thereof, the electromagnetic interaction device being concentrically positioned inside the first optical waveguide device, and the first optical waveguide device is separated from the first optical waveguide device by a preset transverse interaction distance, and the preset transverse interaction distance is suitable for establishing coupling of an optical mode and evanescent waves of the plurality of second optical resonators or enabling the evanescent waves of the optical mode to be reflected by the plurality of reflection metal structures. The rotor comprises a circular frame (22) coaxial with the central hub (20) and comprising spokes (R) in an integral arrangement converging towards the central hub, the spokes being adapted to support a region (24) for accommodating a plurality of second optical resonators or for accommodating a plurality of reflective metal structures in a peripheral region of the frame. The frame is separate from the central hub and disposed above the substrate (S), in a non-operational state, the frame can be supported on the substrate by a support structure (26), and in an operational state in which the optical mode is guided in the first optical waveguide arrangement of the stator, the frame can be raised from the substrate.

An apparatus and method are described for performing microbial sampling operations on a culture medium (T) containing biological particles arranged in shallow containers (100a, 100b). The device includes at least one movable member (15) configured to move non-contactly on a drive surface (12) by means of electromagnetic interaction and equipped with corresponding support members (23a, 23b) to support the shallow containers (100a, 100b), and also includes a controller (50) configured to command the at least one movable member (15) to shift on the drive surface (12) between a first operating region (Z1) and a second operating region (Z2), in which the shallow containers (100a, 100b) are received on the corresponding support members (23a, 23b), and in the second operating region (Z2), the movable member (15) has been held in a use position (PU) by the controller (50), thereby allowing the shallow containers (100a, 100b) to be fluidly connected to a suction unit (19) via a suction port (20) provided in the second operating region (Z2).

A rotary reciprocating drive actuator includes: a movable body including a shaft portion and a magnet fixed to the shaft portion; a fixing body including a core assembly, the core assembly including a core body and coils, the core body having magnetic poles, the core assembly being disposed such that the magnetic poles face an outer periphery of the magnet; and a pair of shaft supports configured to sandwich the core assembly in an extending direction of extension of the shaft portion and support the shaft portion at opposite sides of the core assembly such that the shaft portion is rotatable, in which a magnetic flux passing through the core body is generated by energization of the coils, causing reciprocating rotation of the movable body about an axis of the shaft portion by electromagnetic interaction between the magnetic flux and the magnet.

The present invention relates to a new form of air, land, underwater or space propulsion achieved by the use of suitable electromagnetic interactions. By using capacitors formed by symmetric or asymmetric conductors (1) and (2), surrounded by a dielectric (3), subjected to asymmetric voltage pulses or with asymmetric electric field derivative we obtain directional propulsion forces. This is possible due to a new electromagnetic propulsion mechanism that uses conservation of total momentum where the sum of the mechanical momentum with the electric field momentum should always be conserved resulting in a constant and zero total sum of the two components, where the change in electric field momentum will generate a corresponding change in the mechanical momentum of the capacitor thus generating propulsion forces where the inertia forces are attenuated and can generate force fields.

The invention provides a loudspeaker and a vehicle comprising the loudspeaker. The loudspeaker comprises a frame assembly, a magnetic circuit assembly, a voice coil, a vibrating diaphragm and a damper assembly. The frame assembly is used for bearing and fixing other parts, the magnetic circuit assembly is used for generating a magnetic field, and the voice coil is used for cooperating with the magnetic circuit assembly to move along a first direction relative to the frame assembly through electromagnetic action. The damper assembly is provided with a heat dissipation part which is in heat conduction connection with the voice coil, the damper assembly elastically supports the voice coil, meanwhile, direct heat conduction connection with the voice coil is achieved through the heat dissipation part, heat generated when the voice coil works can be conducted to the heat dissipation part, the heat dissipation area is increased, the temperature of the voice coil is remarkably reduced through heat exchange with air, and deformation or burning of the voice coil is avoided. Therefore, the service life of the loudspeaker is prolonged. The vehicle comprises the loudspeaker, and the loudspeaker can stably output in the environment in the vehicle, so that the hearing experience of the vehicle-mounted audio system is remarkably improved.