7results about How to "Avoid Magnetic Interference" patented technology

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.

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.

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.