17results about How to "Avoid Magnetic Interference" patented technology

The invention relates to a power transmission line inspection unmanned aerial vehicle navigation method and device, an unmanned aerial vehicle, equipment and a medium, and relates to the technical field of unmanned aerial vehicles. The method comprises the following steps: acquiring a first electric field intensity collected by a first electric field sensor and a second electric field intensity collected by a second electric field sensor of the unmanned aerial vehicle in an inspection process; the first electric field sensor and the second electric field sensor are vertically arranged; according to the first electric field intensity and the second electric field intensity, determining the synthetic electric field intensity of the position of the unmanned aerial vehicle; and determining a flight strategy of the unmanned aerial vehicle according to the synthesized electric field intensity, a preset electric field intensity range, the first electric field intensity, the second electric field intensity and a preset electric field proportion range to control the unmanned aerial vehicle to fly relative to the power transmission line according to a preset safety distance. The method can improve the navigation accuracy of the unmanned aerial vehicle.

The invention provides a magnetic resonance compatible multispectral fluorescence mesoscopic imaging system, which comprises a fixing device located in a magnetic resonance cavity of magnetic resonance equipment and used for fixing an experimental object to be observed; the optical equipment comprises a light emitter, a light collector and a light conduction assembly, the light emitter is used for emitting light rays of at least two different wave bands, the light rays emitted by the light emitter are used for exciting fluorescence in an experiment object, and the light emitter and the light collector are both located outside the magnetic resonance cavity; and the computer is used for producing images. The system can realize synchronous acquisition of magnetic resonance imaging and multispectral mesoscopic fluorescence imaging when an experimental subject is in a waking state.

The utility model relates to the technical field of optical lenses, in particular to a high-condensation aspheric optical lens, which comprises a lens body and a protective component, an anti-reflection film, an anti-static film and a hardened layer are sequentially plated on the upper surface of the lens body from bottom to top, and an anti-reflection film is also plated on the lower surface of the lens body. The lens body is installed in the annular placement groove formed in the inner wall of the elastic rubber protection sleeve, the lens body can be positioned for the first time and protected, meanwhile, the clamping mechanisms are arranged on the two sides of the elastic rubber protection sleeve, the clamping mechanisms lock the elastic rubber protection sleeve to replace a traditional magnetic suction cover, the number of assemblies is reduced, and meanwhile the assembly efficiency is improved. And magnetic interference can also be avoided.

The invention belongs to the technical field of oil and gas well drilling and completion engineering design and construction, and particularly provides a well group underground drilling anti-collision detection method which comprises the following steps: determining a target site; a foundation well is drilled in the target site; drilling a plurality of adjacent wells around the base well; a casing pipe is put into the adjacent well; an anti-collision tool is put into the foundation well; and starting the anti-collision tool to carry out magnetic detection on the casing pipe in the adjacent well, comparing a magnetic detection result with actual data of the casing pipe in the adjacent well, and correcting until the magnetic detection result is consistent with the actual data, thereby completing anti-collision detection. The problem that the research and development progress of the large well group drilling anti-collision tool is reduced due to the fact that the effect of the large well group drilling anti-collision tool is not systematically verified in the prior art is solved. Data are provided for improvement of the anti-collision tool, the magnetic detection effect of the anti-collision tool is improved, the improvement time of the anti-collision tool is shortened, and the research and development cost is reduced; and the current related technical blank is filled.

The invention discloses a vertical rotary frequency conversion unit which is used for frequency raising and grid connection of low-frequency electric energy of offshore wind power. The generator layer is provided with an upper rack, a power grid side generator and an upper guide bearing, the motor layer is provided with a middle rack, an offshore wind power side motor and a middle guide bearing, and the lower rack layer is provided with a lower rack and a lower guide bearing; the generator layer is located above the motor layer, the vertical shaft system penetrates through and drives a generator rotor and a motor rotor to rotate synchronously, and the two rotors are limited between the upper-middle guide bearing and the middle-lower guide bearing respectively. The motor and the generator synchronously rotate through a shaft system, and low frequency of an offshore wind power side is converted into power frequency of a power grid side; a thrust bearing is arranged on the upper portion or the lower portion of the vertical shaft system to support rotating weight, and a brake device is arranged on the lower rack and forms a friction pair with a motor rotor brake ring to achieve shutdown. The unit is reasonable in space layout, stable in shafting and suitable for offshore wind power medium and long distance conveying scenes.

The utility model belongs to the technical field of voltage mutual inductance, and particularly relates to a voltage mutual inductance device with a cable plug type independent power supply. A voltage transformer for a power supply comprises an independent voltage iron core and an independent power supply primary coil wound on the independent voltage iron core; a phase iron core, a B phase iron core, a C phase iron core, and an A phase primary coil, a B phase primary coil and a C phase primary coil respectively wound on the A phase iron core, the B phase iron core and the C phase iron core are physically separated, the five transformers form a 5PT integrated structure through epoxy resin, and ferromagnetic resonance is effectively inhibited by combining iron core material optimization and anti-resonance design. Compact design is achieved, and narrow spaces such as a ring main unit are adapted. And the safety is improved. Magnetic field interference is avoided and metering precision is ensured.

The invention provides a tunnel magnetoresistance magnetic detector with out-of-plane magnetic field detection capability, which comprises a superconducting shielding layer which is of a rectangular superconducting thin film structure, and the direction of an external magnetic field perpendicular to the superconducting shielding layer is changed into the direction parallel to the superconducting shielding layer by utilizing the complete diamagnetism of a superconductor; the two tunnel magnetoresistors are located in edge areas on the two sides below the superconducting shielding layer respectively, the size of each tunnel magnetoresistor is smaller than that of the superconducting shielding layer, and the two tunnel magnetoresistors are the same in magnetic sensitive direction, parallel to the thin film plane of the superconducting shielding layer and used for detecting the magnetic field intensity parallel to the superconducting layer direction; the differential amplifier is used for amplifying differential signals of the two tunnel magnetoresistors; and the signal acquisition system is used for acquiring and processing the amplified differential signals of the two tunnel magnetoresistors. The problem that an existing tunnel magnetoresistor is difficult to detect a magnetic field in the out-of-plane direction is solved.

The invention discloses an alkali metal atomic gas chamber laser non-magnetic heating temperature control device and method.The device comprises a heating laser, an optical fiber, a cylindrical cavity structure, an atomic gas chamber, an infrared thermometer, a temperature control circuit board and an upper computer, the atomic gas chamber is arranged in the cylindrical cavity structure, and a quantum well mixing system is arranged on the outer wall of the atomic gas chamber; light through holes are formed in the periphery of the cylindrical cavity structure, the heating laser and the infrared thermometer respectively penetrate through the light through holes of the cylindrical cavity structure through optical fibers to be connected with the atomic gas chamber, the infrared thermometer is connected with the temperature control circuit board, the temperature control circuit board is connected with the heating laser through optical fibers, and the temperature control circuit board is connected with the upper computer. Magnetic field interference can be avoided, the stability of a high-temperature heating state is kept, and the precision of magnetic field measurement is improved.

A lens driving mechanism disclosed by the present invention comprises a base, two first coil groups, a frame and a carrier, the base has two pairs of included angles, the two included angles of one pair of included angles are oppositely arranged along a first direction, the two included angles of the other pair of included angles are oppositely arranged along a second direction, the first direction is perpendicular to the second direction, and the two pairs of included angles form a rectangular structure. And the two first coil groups are respectively positioned at two pairs of included angles of the base. The frame is located on the top face of the base and provided with two first magnet sets and two second magnet sets, and the two first magnet sets are arranged opposite to the two first coil sets respectively and matched with the two first coil sets to drive the frame to move in the first direction and the second direction. The second magnet group is located between the two first magnet groups. The carrier is movably connected with the frame in the vertical direction and provided with a second coil assembly, and the second coil assembly is arranged opposite to the second magnet assembly and can drive the carrier to move in the vertical direction in cooperation with the second magnet assembly.

The application relates to a cigarette package extraction device and belongs to the technical field of tobacco packaging. The application specifically comprises a machine base, a material pickup mechanism arranged on the machine base, and a pickup control mechanism connected with the material pickup mechanism. The machine base can reciprocate between a first position and a second position. The pickup control mechanism is used for controlling the material pickup mechanism to switch between a suction state and a release state. When the machine base moves to the first position, the pickup control mechanism controls the material pickup mechanism to switch to the suction state, so that the material pickup mechanism sucks the cigarette package. When the machine base moves to the second position, the pickup control mechanism controls the material pickup mechanism to switch to the release state, so that the material pickup mechanism releases the cigarette package. The application controls the material pickup mechanism to switch between the suction state and the release state through the pickup control mechanism, realizes the automatic switching of the two states of cigarette package adsorption and release, eliminates the quality defects of cigarette package deformation and damage, and improves the stability of cigarette package conveying.

The invention discloses a method for welding a polycrystalline diamond compact on a non-magnetic stabilizer, which comprises the following steps of: S1, cladding nickel-based or chromium-based metal powder on the surface of a non-magnetic stabilizer body through laser equipment to form a transition layer; s2, welding the polycrystalline diamond compact on the transition layer through a silver-based or copper-based brazing material; and S3, after welding is completed, the welded non-magnetic stabilizer enters heat preservation equipment, the equipment temperature ranges from 290 DEG C to 310 DEG C, heat preservation is conducted for 170-190 min, and then air cooling is conducted to the room temperature. Nickel-based or chromium-based metal powder is cladded between a non-magnetic stabilizer body and a polycrystalline diamond compact by laser equipment to form a transition layer, so that guarantee is provided for the adhesion of subsequent welding; and heat preservation equipment is used for heating materials needing laser cladding and welding in advance to the proper time, energy input needed in the laser cladding and welding process is reduced, and the non-magnetic stabilizer is prevented from being magnetized in the welding process.

The invention relates to the technical field of transformer production, and discloses a transformer winding method which comprises the following steps: S1, placing a framework on a CNC winding machine; s2, winding a first copper wire around the framework along one direction at the PI N end of the framework for the first time; s3, performing secondary winding on the surface of the coil subjected to primary winding by using a second copper wire, wherein the head wire and the tail wire of the second copper wire are not crossed; s4, performing third winding on the surface of the coil after the second winding by using a third copper wire; s5, utilizing a fourth copper wire to perform fourth winding on the surface of the coil after the third winding is completed; s6, carrying out fifth winding on the surface of the coil after the fourth winding is completed by utilizing a fifth copper wire; and S7, tidily assembling the wound magnetic cores, carrying out impregnation treatment in a vacuum environment, drying the impregnated product through an oven, and carrying out quality detection on the product.

The present invention relates to an image sensing module, comprising a base, a sensor seat for fixing the image sensor, a piezoelectric device and a control circuit electrically connected to the piezoelectric device. One end of the piezoelectric device is fixedly connected to the base, and the other end is connected to the sensor seat. The control circuit is used to control the piezoelectric device to move the sensor seat so that the sensor seat translates and rotates relative to the base in front of the base. The image sensing module of the camera of the present invention has a jitter compensation device, which utilizes the piezoelectric device to move the sensor seat of the image sensor to translate and rotate relative to the base. Therefore, the camera using the image sensing module does not need to be equipped with a lens motor with a closed-loop optical image stabilization function, and can avoid the problem of magnetic interference from the external environment.

The invention discloses composite outer wall integrated lamination production equipment of an integrated house, and relates to the technical field of building wallboard manufacturing, the composite outer wall integrated lamination production equipment comprises a hydraulic cylinder and a lamination cabinet, the inner side wall of the lamination cabinet is slidably connected with a lamination mechanism, the lamination mechanism comprises a lamination assembly, and the lamination assembly comprises a protective shell and two hot pressing plates. According to the invention, the coil is arranged in the lamination assembly, the coil is connected with the power box through the electronic oscillator, and high-frequency alternating current is provided for the coil, so that a high-frequency alternating magnetic field is generated around the coil, the magnetic field generates induced eddy current on the hot press plates on the upper and lower surfaces, and the high-frequency alternating magnetic field enables the hot press plates to generate induced heat; the laminated board is in direct contact with the hot pressing board and conducts heat, induced current is located on the surface of a conductor of the hot pressing board under the action of the skin effect, generated induction heat is concentrated on the surface of the conductor, the problem of heating hysteresis in the laminating process of the laminated board is solved, and the quality of the formed composite wallboard is better.

This utility model provides a wristband bracket, which includes a frame portion, a wristband portion, and a bracket portion. The frame portion is a hollow structure and is used to install on the camera exposure part of the protective shell body. One end of the wristband portion is fixedly connected to the frame portion, and the other end of the wristband portion is a movable end. The bracket portion is used to limit the movable end of the wristband portion. The bracket portion includes a bracket base and a rotating bracket rotatably connected to the bracket base. The bracket base is used to connect to the protective shell body.

The present application discloses a camera module and an electronic device, the camera module includes: a base; a liquid lens, the liquid lens is connected to the base; a magnetic part, the magnetic part is fixed relative to the base, and the magnetic part is used to generate a magnetic field; an anti-shake component, the anti-shake component is connected to the liquid lens, the anti-shake component includes an anti-shake coil, and the anti-shake coil is located in the magnetic field; a focusing component, the focusing component is connected to the liquid lens, the focusing component includes a focusing coil, and the focusing coil is located in the magnetic field; the anti-shake coil can drive the anti-shake component to move away from the initial position under the action of the magnetic field to perform anti-shake, and the focusing coil can drive the focusing component to move away from the initial position under the action of the magnetic field to perform focusing. The camera module provided by the present application can avoid the problem of magnetic interference between the magnetic part used to realize the anti-shake function and the magnetic part used to realize the focusing function, so that the performance of the camera module is better, and on the other hand, it can also make the entire camera module compact.

The present invention provides a device and method for measuring the tool face angle of a drilling tool, the device comprising an acceleration sensor, a prefilter, a phase-locked loop module and a solution module; the acceleration sensor is used to obtain the acceleration signal of the drilling tool, and is also used to output the acceleration signal to the prefilter; the prefilter is used to filter the acceleration signal to obtain an acceleration denoising signal, and is also used to output the acceleration denoising signal to the phase-locked loop module; the phase-locked loop module is used to generate an oscillation signal based on the rotation speed signal of the drilling tool, obtain a corrected oscillation signal based on the acceleration denoising signal and the oscillation signal, and is also used to output the corrected oscillation signal that meets the preset requirements as a virtual tool face signal of the drilling tool to the solution module; the solution module is used to solve the virtual tool face signal to obtain the tool face angle of the drilling tool. The present invention can solve the technical problem that the existing method is affected by the magnetic interference of the geomagnetic field, resulting in large measurement errors or failure to obtain measurement results.