10results about How to "Shield electromagnetic interference" patented technology

This utility model relates to the field of electromagnetic shielding materials technology, and provides an electromagnetic shielding composite material structure, including a first shielding layer and a protective structure. A second shielding layer is disposed on one side of the first shielding layer, and a protective structure is disposed inside both the first and second shielding layers. By providing the protective structure, when electromagnetic waves are incident on the electromagnetic shielding composite material, the first and second metal film layers effectively reflect most of the electromagnetic waves back to their original direction, thus preventing electromagnetic wave penetration. Furthermore, a heat insulation layer is provided to prevent heat transfer. This heat insulation layer is an electromagnetic shielding heat insulation material with functions such as heat insulation, waterproof sealing, and corrosion resistance, thereby protecting the internal structure or equipment of the composite material from the effects of high-temperature environments. Finally, a wear-resistant layer is made of transparent PET material, which has properties such as abrasion resistance and corrosion resistance.

The present application relates to the technical field of spectrometer, and specifically discloses a light source excitation assembly of a spectrometer, the spectrometer comprising a light inlet channel, the light source excitation assembly comprising: a placing table cooperating with a clamping component; a through hole is arranged in the middle of the placing table, the center of the through hole is coaxial with the center of a bottom excitation component; an excitation table is arranged in close contact with the bottom of the placing table, a groove is arranged on the excitation table, one end of the groove facing the light inlet channel abuts against an adjustable light barrier, a ventilation hole is arranged at the bottom of the end of the groove away from the light inlet channel, and a light inlet hole corresponding to the light inlet channel is arranged on the excitation table; the adjustable light barrier is arranged in the center of the through hole of the light inlet channel, and the light transmission height of the adjustable light barrier is adjustable; the bottom excitation component is fixedly arranged in the middle of the groove; and the axis of the light inlet channel is arranged at a preset included angle with the plane where the light inlet hole is located. Through improvement of the light source excitation assembly, a larger irradiation intensity is allowed to be used for detection of a sample to be measured, so that the characteristic spectral signal dispersion rate and signal density during detection are improved, and the detection range of substances is expanded.

The utility model discloses a high strength shock resistant rubber medium voltage cable relates to medium voltage cable technical field, including cable core, the cable core is composed of two sets of wire core, the wire core includes conductor, wrapping the outside of conductor insulating layer and wrapping the outside of insulating layer shielding layer, the outside of cable core is provided with buffer layer, and the outside of cable core is provided with the buffer layer. The buffer layer comprises an elastic inner layer and a fiber braid layer, the elastic inner layer is coated with the fiber braid layer, a reinforcing layer is arranged outside the buffer layer, the reinforcing layer comprises a supporting inner layer and an anti-impact outer layer, the supporting inner layer is coated with the anti-impact outer layer, an outer protective layer is arranged outside the reinforcing layer, and the anti-impact outer layer is arranged outside the outer protective layer. The outer protective layer comprises a wear-resistant base layer and an anti-tear surface layer, the wear-resistant base layer is coated with the anti-tear surface layer, and the problems that the impact resistance effect of the medium-voltage cable is poor and the improvement of the insulation performance is limited are solved.

The invention discloses a board-to-board connector with a shielding structure. The board-to-board connector with the shielding structure comprises a first circuit board, a first connecting piece, a buffer conductor, a second circuit board, a second connecting piece and a shielding cover, the first connecting piece is arranged on the first circuit board; the buffer conductor is arranged on the first circuit board and surrounds the first connecting piece; the second circuit board is perpendicular to the first circuit board, and one side edge of the second circuit board is provided with a first metal layer; the second connecting piece is arranged on the second circuit board and is in butt joint with the first connecting piece along a butt joint direction; the shielding cover is arranged on the second circuit board and surrounds the second connecting piece; when the second connecting piece is in butt joint with the first connecting piece in the butt joint direction, the side edge of the second circuit board abuts against the buffering electric conductor, so that the first metal layer is electrically connected to the buffering electric conductor, and the shielding cover surrounds the first connecting piece. The first metal layer of the board-to-board connector with the shielding structure provided by the invention can make up the problem that the shielding cover cannot completely shield the connector.

The utility model discloses an anti-electromagnetic interference shielding shell structure based on a new energy automobile motor controller, which comprises a mounting seat, the top of the mounting seat is connected with a protective shell in a clamping manner, the inner wall of the protective shell is connected with a metal shielding layer in a clamping manner, and the top of the mounting seat is in bolted connection with an exhaust fan close to one side. Buckle structures are symmetrically and fixedly connected to the positions, close to the side wall, of the top of the mounting base, and a reinforcing assembly is mounted at the position, close to the corner of one end, of the top of the mounting base. According to the motor controller, the metal shielding cover is arranged in the controller shell, so that external electromagnetic interference can be shielded, the motor controller can work stably, the shell is arranged to be in a covering mode, the motor controller can be rapidly installed and fixed through a buckle structure, and meanwhile, the positioning and reinforcing assembly is additionally arranged, so that the motor controller can work stably. And the protection strength of the whole controller shell is improved.

This invention discloses a cavity electrically tunable preselection filter, relating to the field of wireless communication equipment. It includes a mounting cavity and a PCB board. The PCB board is fixed to the mounting cavity via connectors and houses an integrated circuit and a coil assembly. The mounting cavity contains four resonant cavities and two circuit-shielded resonant cavities. The four resonant cavities are arranged side-by-side along the length of the mounting cavity. The two circuit-shielded resonant cavities are arranged side-by-side along the width of the mounting cavity and located in the middle of the four resonant cavities, serving to shield the integrated circuit and provide resonance for the resonant cavities on either side. The coil assembly includes four coils for specific frequency bands. The four coils are electrically connected to the PCB board and located within the four resonant cavities. It features a compact structure, excellent filtering performance, and adaptability to complex electromagnetic environments.

The utility model discloses a motor structure and vehicle electric power assisted steering system with it relates to motor technical field, including: the pivot, the fixed sleeve, the fixed sleeve downside is provided with the first mounting hole, the pivot upper end is inserted into the first mounting hole, the fixed sleeve upside is provided with the second mounting hole, the hole wall of second mounting hole is non -circular hole wall, the inductive magnet is located in second mounting hole, the lateral wall of inductive magnet is non -circular lateral wall, the outside wall of non -circular lateral wall is stuck up the inside wall of non -circular hole wall, the circuit board is located inductive magnet top, the circuit board downside is provided with sensor, the fixed sleeve is installed in pivot end position, and inductive magnet is not easy to axial deviation on the pivot, and the non -circular lateral wall of inductive magnet and the non -circular hole wall of fixed sleeve correspond with the design of fixed sleeve and ensure that inductive magnet is not easy to rotate and slide deviation on the pivot, so as to guarantee the precision of sensor pivot monitoring.

The utility model relates to a kind of multilayer polycarbonate radar protective cover with outer surface heating function, including polycarbonate base material, polycarbonate base material outer surface is sequentially provided with hardening layer, ITO film layer, AR film layer, the upper end of ITO film layer is provided with upper conductive silver paste, the lower end of ITO film layer is provided with lower conductive silver paste, the cross section of the upper conductive silver paste and the lower conductive silver paste is cylindrical.The utility model can effectively improve the operating performance of radar system, prevent water vapor condensation or frost formation.

The invention discloses an insulating flame-retardant patch convenient to position and mount, which comprises a silica gel protective film, the upper surface of the silica gel protective film is a silica gel glue layer, and the silica gel protective film is provided with a positioning hole and a pull lug; the conductive single-sided adhesive tape comprises a conductive base material layer and a conductive adhesive layer located on one side of the conductive base material layer, and one side, deviating from the conductive adhesive layer, of the conductive base material layer is adhered to the silica gel glue layer of the silica gel protective film; the flame-retardant insulating film is attached to the conductive adhesive layer of the conductive single-sided adhesive tape; the double-sided adhesive layer is of a hollow structure matched with the outer contour of the flame-retardant insulating film, and the double-sided adhesive layer is attached to the edge area of the conductive single-sided adhesive tape and surrounds the periphery of the flame-retardant insulating film. According to the invention, while the thinning requirement is met, the integration of multiple functions of accurate positioning and mounting, convenient and fast tearing of the protective film, efficient electromagnetic shielding, high-grade insulation and flame retardance and firm fixation is realized.

The utility model discloses an embedded installation structure of integrated 5G communication module, including shield case, the both sides of shield case are equipped with several embedding slot, the both sides of shield case are equipped with the installation mouth, and the installation mouth is hinged to be provided with the ventilation cover, and the embedding slot corresponds to each other, and the embedding slot between corresponding each other intercommunication, embedding slot inner wall is hinged to be provided with fixed bolster, through pressing the irregular special-shaped pole -shaped limit handle, and the supporting rod drives the spacer block to move down and separates from the limit slot, can easily take out fixed bolster, need not help additional tool, and the maintenance time is greatly shortened, and the inboard both ends of fixed bolster are equipped with the limit plate and limit slot, and form accurate clamping with limit handle, ensure the stable installation, and the antiskid rubber pad of embedding slot inner wall further enhances the stability, effectively resists the vibration and impact, and this modular design makes different specifications 5G communication module can replace and upgrade fast, especially suitable for the industrialized scene of extremely high installation efficiency requirement.