380results about How to "Good grounding" patented technology

An electrical connector includes an insulating body, and a shell body. The insulating body includes a body, pivoting concave ditches located at two sides of end of the body and formed along horizontal directions, and circular rotating angles located at the top rim of the two sides of the end of the body. The body receives a plurality of conducting pins. The shell body includes a top wall, side walls, pivoting convex columns, and a blocking element. The pivoting convex column is located in the pivoting concave ditch. By moving the pivoting convex column in the pivoting concave ditch, the shell body moves. By contacting the blocking element with the arc of the circular rotating angle, when the shell body rotates to a specified angle with the insulting body, the shell body moves along the side wall of the shell body.

The invention relates to a fiber array coupled with a VSCEL or PIN array and a manufacturing method of the fiber array. The fiber array comprises a cover slip, a carving groove substrate and a fiber micro-strip, the fiber micro-strip comprises an exposed fiber micro-strip portion without a fiber coating, a V-shaped carving groove for holding the exposed fiber micro-strip portion is formed in the carving groove substrate, the cover slip presses the groove of the exposed fiber micro-strip portion, the carving groove substrate, the cover slip and the exposed fiber micro-strip portion are fixedly connected through binding agents, the cover slip is shorter than the V-shaped carving groove, the end face of the exposed fiber micro-strip portion is an optical plane with a 45-degree oblique angle, and the optical plane faces the carving groove substrate. The coupling distance between the 45-degree optical plane of the exposed fiber micro-strip portion and the VSCEL or PIN array is controlled by the aid of the cover slip of the fiber array, the thickness of the cover slip can be customized, and high-efficiency coupling is realized. The method for manufacturing the fiber array is simple, easy to implement and low in cost.

The invention discloses an LCD (liquid-crystal display) at least including a backlight module, a light source group, a rubber frame, an LCD panel module and a PCB (printed-circuit board). The backlight module at least includes a metal back plate, wherein the metal back plate at least includes a bottom plate and a side plate; the light source group is arranged in the metal back plate; the rubber frame is arranged on the outer edge of the metal back plate and attached to the outer side surface of the side plate of the metal back plate, wherein the rubber frame at least include a spring pressingpiece; the LCD panel module is arranged on the backlight module; and the PCB is electrically connected with the LCD panel module and arranged on the outer side of the backlight module, wherein the PCB at least includes a grounding area, and the spring pressing piece correspondingly presses the PCB for enabling the grounding area to be in direct contact with the metal back plate.

The invention relates to a method for enhancing the welding reliability of a high-frequency quad flat no lead (QFN) device. The method comprises the following steps of: (1) uniformly coating a high-temperature solder with the smelting point of between 214 and 220 DEG C on a lining board and welding a printed board on the lining board; (2) coating a low-temperature solder with the smelting point of between 180 and 188 DEG C on a bonding pad of the printed board by using a bushing, sticking the QFN device and welding, wherein the opening size of the bushing is smaller than that of the bonding pad of the printed board; and (3) fastening the lining board in a shell. Through a welding method, secondary heating of the device is avoided, welding stress is reduced and good mechanical support is provided for the printed board assembly on the basis of ensuring that a printed board assembly is fully grounded; simultaneously, thermal stress produced by a component under a cold and heat exchange condition can be greatly reduced and the reliability of the QFN device is enhanced.

The invention relates to a borate birefringent crystal for ultraviolet and deep ultraviolet. The birefringent crystal has a chemical formula Ba2Mg (B3O6)2, belongs to trigonal system, and has a space group of R-3; and a equals to 0.70528 (3) nm, and C equals to 1.65520 (9) nm, and Z equals to 12. The barium magnesium borate birefringent crystal is an aniaxial negative crystal with ne less than no, has a transmission range of 177-3000 nm and birefringence between 0.077-0.229, and is easy for cutting, grinding, polishing and storage, stable in air, and hardly deliquesced. The barium magnesium borate birefringent crystal is subjected to a self-melt spontaneous crystallization method, a melt Czochralski method or a fluxing medium method for growth; the barium magnesium borate birefringent crystal has large birefringence (no-ne = 0.077-0.229), has important application to fields of optics and communication for the production of polarized beam splitting prism.

The invention discloses a system and method for monitoring damaged on-off quantity of a surge protection device and ground resistance online in the real time. A measuring system comprises a server, one or a plurality of remote monitoring terminals and one or a plurality of data collecting systems. The server is respectively connected with various remote monitoring terminals and all data collecting systems. Each data collecting system comprises a damaged on-off quantity data collecting module and a ground resistance collecting module. Each damaged on-off quantity data collecting module comprises m row-connecting lines and n line-connecting lines. Each ground resistance collecting module comprises a micro-processor module, a constant current source injection module, a sampling voltage reading module and a ground resistance measuring software module. The micro-processor modules are connected with the constant current injection modules, the sampling voltage reading modules and the ground resistance measuring software modules respectively. The system and method can guarantee effective judgment of damaged on-off quantity of all surge protection devices and simultaneously can measure the ground resistance in the real time precisely. The system and method is especially suitable for railway signal lightning protection.

Elastic roller and process for producing elastic roller. The elastic roller includes a hard roller core and an elastic coating layer at an outer side of the hard roller core. The elastic coating layer includes an elastic matrix material and fillers imbedded in the matrix material, and at least a portion of the fillers include metallic fillers. The process includes combining at least one metallic filler into an elastic matrix material and applying the combined elastic matrix material and at least one metallic filler onto an outer side of the hard roller core to form an elastic coating layer.

A mounting bracket (10) for holding a disk drive (30) includes a bottom wall (12), a first sidewall (14) extending upwardly from one side of the bottom wall with two locating pins (16) protruding inwardly therefrom corresponding to two fixing holes defined in a sidewall of the disk drive, a second sidewall extending upwardly from an opposite side of said bottom wall for sandwiching the disk drive with the first sidewall, and locking means for engaging with a second sidewall of the disk drive to retain the disk drive in the mounting bracket. In assembly, the disk drive is placed in the mounting bracket, and the locating pines are inserted into the fixing holes of the disk drive. With the other sidewall of the disk drive secured to the fixing structures of the mounting bracket, the disk drive is secured in the mounting bracket.

The invention relates to a grinding process of a sealing surface of a ball valve. The grinding process comprises the steps of rough grinding, fine grinding, ultrafine grinding, and grinding and cleaning of a valve seat and a sphere, wherein a diamond paste and an engine oil mixture are adopted in the rough grinding, the particle size phi of the selected diamond paste ranges from 40mu m to 10mu m, so that the scratch removal and sphere rounding can be realized; in fine grinding, a diamond paste, kerosene and a microcrystal graphite mixture are adopted, the particle size phi of the selected diamond paste ranges from 7mu m to 5mu m, so that the primary mirror surface effect can be achieved; in the ultrafine grinding, a diamond paste and a microcrystal graphite and kerosene mixture are adopted, the particle size phi of the selected diamond paste is smaller than 5mu m, the rotating speed of the sphere is controlled to be below 5rpm to achieve the mirror surface effect, and finally the kerosene is coated on the sphere and grinding cleaning are performed to achieve a better mirror surface effect. The sphere ground and the sealing surface of the valve seat can achieve the mirror surface effect, the surface roughness can achieve Ra0.02-0.005, the operation torque is low, the service life is long, the valve seat can be adsorbed on the spherical surface of the sphere, and no leakage exists under the trial pressure of low-pressure nitrogen being 0.6Mpa.

The invention provides a K-band microstrip patch antenna array, which belongs to the field of antennas. The dielectric board is provided with three columns of antennas parallel to each other and with the same structure, which are respectively transmitting antennas, first receiving antennas and second receiving antennas; the antennas of each column There are several microstrip antenna units, several 1/4 wavelength microstrip feeders, power dividers and feed ports; there are several impedance converters, several microstrip transmission lines and several feeder bending lines in the power divider ; The bottom of the dielectric plate is provided with a metal grounding plate; the invention designs a K-band microstrip array antenna with stronger anti-interference ability, so that the detection of moving objects is more accurate.

A water curtain apparatus for disinfecting and cleaning air in order to remove microbes, virus and dust from indoor air is composed of the air inlet and outlet chambers with axial-flow blower, and a disinfecting-cleaning chamber consisting of upper and lower water tanks, a netted grate for generating water curtain and connected to the negative electrode of a HF high-voltage power supply and a Mo wire mesh connected with the positive electrode of said power supply.

The present invention relates to a wheat ridge-forming plate and wheat ridge-forming-sowing machine. Said ridge-forming plate includes a front-face plate and two side-wing plates which are respectively connected with two sides of said front-face plate, two ends of front-face plate and two side-wing plates are respectively equipped with an upwards-flanged edge and a downwards-flanged edge. Said wheat ridge-forming-sowing machine includes the following several portions: wheat ridge-forming plate, machine frame, earthing-up plough, ridge roller, distributor and sowing wheel.

A wireless communication module assembly includes a main board having a top surface on which a plurality of grounding pads are provided, a circuit board unit, and a metal cap. The circuit board unit has a bottom surface electrically mounted on the top surface of the main board, a top surface with a plurality of grounding pads, and a plurality of notches corresponding to the grounding pads of the main board. The metal cap covers the circuit board unit and has first mounting legs respectively and electrically connected with the grounding pads of the circuit board unit, and second mounting legs respectively passing through the notches of the circuit board unit and electrically connected with the grounding pads of the main board.

The invention discloses a W-band even-order sub-harmonic mixer, which comprises a radio-frequency broadband band-pass filter, an anti-parallel diode pair, a phase adjusting transmission line, a local oscillator low-pass filter and a duplexer, wherein one end of the local oscillator low-pass filter is connected with a common port of the duplexer while the other end of the local oscillator low-pass filter is connected with the phase adjusting transmission line, and the anti-parallel diode pair is bridged between the radio-frequency broadband band-pass filter and the phase adjusting transmission line. The W-band even-order sub-harmonic mixer realizes mutual isolation of radio-frequency signals, local oscillator signals and intermediate frequency signals by means of the radio-frequency broadband band-pass filter, the local oscillator low-pass filter and the duplexer, and the mixer can realize wide operation bandwidth as the radio-frequency broadband band-pass filter, the local oscillator low-pass filter and the duplexer have wide bandwidth.

A ground clip for a PIU of a busway system has a two part assembly made with two different materials, a first hard material designed to remove dielectric coating on the busway section and a second highly conductive material to establish necessary electrical contact, cooperating together as the PIU is installed on the busway case to establish a reliable ground automatically and without tools.

The invention provides an aqueous fluid for surface treatment of zinc-plated steel sheets and a filmed zinc-plated steel sheets which are formed by the fluid. The aqueous fluid for treatment of zinc-plated steel sheets which comprises (A) ammonium zirconium carbonate, (B) a vanadium (IV) compound, (C) an organophosphonic acid represented by the general formula (I) or an ammonium salt thereof, (D)an anionic water-dispersible acrylic resin having a glass transition temperature (Tg) of 0 to 60 DEG C as obtained by converting the absolute temperature (K) calculated by the numerical formula (1) toCelsius temperature (DEG C), and water and which has a content of (D) of 1 to 60% by mass based on the whole solid matter, a content of (B) of 0.5 to 8% by mass in terms of V based on the whole solidmatter, a V/(C) mass ratio of 0.05 to 1.0, a Zr/(V+(C)) of 0.1 to 6.0% by mass (as calculated by converting (A) to Zr), and a pH of 7 to 10; and zinc-plated steel sheets bearing films resulting fromthe fluid on the surface. The steel sheets of the invention are excellent in corrosion resistance, alkali resistance, appearance, condensed dew resistance, coatability and groundability. The fluid canbe used in treatment equipment similar to that of temporary rust preventive chromate treatment in the manufacturing line for zinc-plated steel sheets.

In a system for ascertaining a bearing state and in a method for ascertaining a bearing state of a bearing of an electric machine, a measurement value (21) is ascertained by means of a sensor unit (20). The measurement value is transmitted to a simulation unit (22), wherein a result value (23) is ascertained by means of the simulation unit (22), wherein the result value is in particular a bearing-current value or a value that is dependent on the bearing current. The result value (23) can be transmitted to a further unit (24).

The invention discloses a capacitance type pressure sensing conversion device and a method of achieving capacitance type pressure sensing on a low-end singlechip. The capacitance type pressure sensing conversion device and the method of achieving capacitance type pressure sensing on the low-end singlechip comprise an elastic press key and a base plate, wherein the bottom surface of the elastic press key is coated with a conductive coating, the conductive coating is opposite to conductive copper foil on the base plate, and the conductive coating and the conductive copper foil form two poles of a capacitance. An elastic medium supporting piece is arranged between the elastic press key and the base plate, and a capacitance detection separation distance is kept between the elastic press key and the base plate. The elastic press key is pressed, and thereby the distance value of the capacitance detection separation distance is changed, and transformation output between pressing force and the capacitance change is generated. Electronic equipment of the low-end singlechip is combined with the capacitance type pressure sensing conversion device, the computer processing power of the low-end singlechip is fully utilized, the data processing efficiency is improved, and thereby the capacitance type pressure sensing conversion is achieved on an ordinary singlechip, and the ordinary singlechip has high-resolution output.