300results about How to "Reliable grounding" patented technology

The invention provides a weld method compounding an ultrasonic and a gas metal arc welding so as to make use of the cavitation effect and the vibration effect of the ultrasonic to lead welding drops generated by the gas metal arc welding to be smoothly transmitted to a welding pool when the drops are still small. And when in welding, an electric arc shrinks under the effect of the ultrasonic and then the stiffness of the electric arc can be enhanced, which has a significant application value for welding of special positions such as a full-position welding, an overhead position welding, a flat position welding and a horizontal position welding, etc.. The invention includes the following steps: an ultrasonic generator is connected with an ultrasonic transducer 2 to convert ultrasonic energy into mechanical vibration; an ultrasonic transformer 3 enlarges amplitude; a conductive tip 5 is combined with the ultrasonic transformer; a protective gas nozzle 4 is fixed on the vibration node of the transformer; a welding wire 1 is connected with the conductive tip 5 to start a welding power supply 9 and then start an ultrasonic power supply after the electric arc becomes stable, then the transducer converts electrical energy into vibration and the ultrasonic transformer enlarges the ultrasonic amplitude which is transmitted to a melting electrode.

The invention discloses a welding method of compounding ultrasonic and nonconsumable electrode voltaic arc. Under the welding condition of protection of nonconsumable electrode gas, the ultrasonic is conducted into welding arc through the conductive electrode and the voltaic arc obviously contracts after ultrasound is carried on. The invention not only has the advantages of stable welding process and high welding and forming quality which normal TIG welding has, but also can improve weld penetration of single-pass welding and therefore the method can realize high quality welding under normal welding condition. The invention converts the high frequency electrical signals of ultrasound supply into mechanical vibration through an energy conversion device and the mechanical vibration is amplified by an amplitude transformer, and then is transmitted to an electrode studded in the amplitude transformer so as to generate supersonic vibration of corresponding frequency on the electrode. The input power of the ultrasound can be adjusted at will between 1W to 1000W and then welding is carried out by the method of normal gas metal arc welding. When voltaic arc is applied to processing pieces, the energy is concentrated, thereby effectively improving utilization ratio of voltaic arc during welding.

Embodiments of the invention disclose a method for processing a groove on a printed circuit board, the printed circuit board and an electronic device. The method for processing the groove on the printed circuit board comprises: processing the groove, the dimension of which is matched with that of a heat-dissipating metal base on a first board set; fixedly arranging the heat-dissipating metal base in the groove processed in the first board set; stitching a second board set with the first board set and thus a third board set is formed; providing a groove in the surface of the second board set after stitching so as to form a blind groove for installing components, wherein partial or all bottom surface of the blind groove is arranged on the heat-dissipating metal base and at least one surface of the heat-dissipating metal base is exposed; and the depth of the blind groove in the vertical direction on the surface of the third board set is larger than the thickness of the second board set after stitching. The scheme provided in the embodiments of the invention is benefit to promote product miniaturization, integration and cost control.

The diagnostic device comprises a receiving means for receiving process variable values (x(t)) of a process variable of a process medium of a process, a measurement processing means for extracting and recording measurement statistics data from such process variable values, which are measured during a measuring phase, a training processing means for extracting and recording training statistics data from such process variable values, which are measured during a training phase, and a comparison means for comparing the measurement statistics data with training statistics data recorded before the measurement statistics data. Preferably, the training statistics data include a training empirical statistical distribution, which can be a distribution of a function of process variable values, which are measured during a training phase, or a distribution of a function of coefficients Xt(k), which are coefficients of a function of a transform of process variable values (x(t)), which are measured during a training phase.

The invention discloses a device component applied to a mobile terminal and the mobile terminal. The device component comprises a fingerprint component, wherein the fingerprint component comprises a fingerprint tray geo-electrically connected to a mainboard of the mobile terminal, a fingerprint module arranged on the fingerprint tray and a conductive component arranged between the fingerprint tray and the fingerprint module. The fingerprint component is effectively and reliably connected to the ground, so that various nonlinear effects generated by coupling radiation of an antenna component to electromagnetic wave on the fingerprint component return to the ground quickly, and thus the influence on the performance of the antenna component after the fingerprint component occupies a clearance area of the antenna component is greatly reduced.

The invention relates to a high-voltage transformer bushing tap grounding on-line monitoring device, which comprises three tap grounding detection devices, a sampling transmission device, a remote monitoring device and a solar battery pack, wherein the three tap grounding detection devices are connected with the sampling transmission device by cables, the sampling transmission device is in wireless communication connection with the remote monitoring device, and the solar battery pack is connected with the sampling transmission device. Through the tap grounding device, the transformer bushing tap grounding is more reliable; and the transformer bushing tap grounding current is detected through measurement coils arranged in the tap grounding device, the sampling voltage output by the measurement coils is led out through measurement leads and used as an input signal of the sampling transmission device, the sampling transmission device outputs the signal to the remote monitoring device, and the tap grounding current can be continuously monitored through the remote monitoring device. The device realizes real-time remote continuous monitoring of the transformer bushing tap grounding current state, and is reliable and stable in working state.

The present invention discloses a tap grounding apparatus used for a transformer bushing. The transformer bushing comprises a base flange provided with a first mounting hole; the tap grounding apparatus comprises a grounding seat, a grounding post and an insulating seat; the insulating seat is fixed in the first mounting hole; a second mounting hole is formed in the insulating seat; the grounding post is fixed in the second mounting hole; a grounding seat cover is arranged on the first mounting hole and fixedly connected to the base flange; the upper end of the grounding post is detachably connected to the grounding seat; one of the grounding seat and the grounding post is provided with a pin terminal; and the other of the grounding seat and the grounding post is provided with a jack capable of allowing the pin terminal to be inserted and connected. According to the tap grounding apparatus, the grounding reliability can be effectively improved and a poor grounding situation caused by a defect of a grounding connector can be conveniently discovered; and the tap grounding apparatus is simple in structure and low in manufacturing cost. The present invention also discloses a transformer bushing. The transformer bushing is provided with any tap grounding apparatus.

A wire bonder (900) with a rigid pedestal (902) having resilient inserts (920). A package (904) placed on the pedestal (902) contains an electrical device (906). The bond pads on the electrical device (906) are electrically connected to bond pads on the package (904) by a series of bond wires (908) through use of a well know bonding process. A vacuum source holds the package (904) against the pedestal (902) deforming the resilient strips (920) located in the rigid member (902) of the pedestal and ensuring good contact between the ground pads of the package (904) and conductive resilient members (920). The resilient members (920) are conductive and electrically connect the package grounds to a system ground (922).

A low-cost noise suppressive technology using a general connector, reliably grounding to a shielding sheath of shielded cable at a low impedance by simple structure. The structure comprises conductive shielding covers attached to a chassis to enclose both sides of the second connector of non-shielded type at a tip of the shielded cable connected to the first connector mounted on the chassis and are fixed in a state to mate each other. Gaskets made of elastic material are respectively attached to inside of each shielding covers and made of conductive material being in electrical contact with the shielding cover. The gaskets are elastically contacted and conducted with the shielding sheath at an exposed portion of the shielded cable when the shielding covers are attached to the chassis to enclose the second connector and are fixed in the state to mate each other.

In a wiper motor including a motor body and a reduction gear apparatus, an accommodating case is integrally provided on a brush holder provided to the motor body, and this accommodating case is disposed on an outer face of a gear case so as to project from a motor yoke. A noise-preventing element including a pair of choke coils and a bidirectional varistor is accommodated in the accommodating case, and the noise-preventing element is connected between a power-feeding terminal of a connector provided on the gear case and brushes. Noises acting on a power-feeding circuit are absorbed by the noise-preventing element and noises which have leaked to the outside via an opening portion of the motor yoke are absorbed by the noise-preventing element.

Embodiments of the invention discloses a PCB (printed circuit board), a PCB processing method and an electronic device. The PCB processing method can comprise: processing a hole on the PCB, wherein the PCB comprises a metal base and at least two layers of base materials, at least one layer of base material from the at least two layers of base materials being provided with a geoelectrical layer thereon and the metal base being fixedly arranged in a groove provided on the base materials, and the processed hole contacting both the geoelectrical layer and the metal base; and arranging a conductive substance in the hole, the conductive substance in the hole contacting the inner layer of the geoelectrical layer and the metal base so as to switch on the inner layer of the geoelectrical layer and the metal base. The scheme of the embodiments of the invention is favourable to improving the reliability of connection between the geoelectrical layer and the metal base of the PCB and improving the transmission performance of a high-frequency signal.

The invention discloses a device and a method for welding high steel grade and large wall thickness pipeline steel. The device for welding the high steel grade and large wall thickness pipeline steel is mainly composed of a work platform controller 1, an idler wheel support 2, a work piece 3, a welding gun 5, a wire feeding nozzle 7, an ultrasonic tool head 8, an amplitude variation pole 9, an ultrasonic transducer 11, a welding power source 20, an ultrasonic generator 21, a wire feeding mechanism 22, an oscillator 14, a transmission shaft 15, an angle adjustor 16 and the like. The method for welding the high steel grade and large wall thickness pipeline steel includes: (1) placing the work piece on the idler wheel support, and starting the work platform controller; (2) setting welding voltage and a welding current, turning on the welding power source, and starting the ultrasonic generator after an electric arc is stabilized; (3) adjusting angles of the welding gun through the angle adjustor; (4) starting the oscillator, and driving the welding gun to swing back and forth through entrance and exiting movements of the transmission shaft; (5) starting the wire feeding mechanism, and staring automatic welding. The device and the method for welding the high steel grade and large wall thickness pipeline steel achieve high welding quality, good weld joint formation, and a high welding joint microstructure constituent homogenization degree, and have a broad market application prospect.

The invention discloses a test jack for a reactive controllable chip, which is composed of a chip holding plate (2), a grounded copper block (3), a probe positioning plate (6), a probe holding plate (7), a ground spring probe (4) and a signal / power supply spring probe (5). With the increasing running speed of integrated circuit chips, a chip test fixture which can meet the demand of test industry should include better high-frequency integrated signal so that reactance (impedance) thereof is within a certain range to reduce the loss of electric signals at the time of get-through. Meanwhile, according to the invention, use requirements can be satisfied only by conveniently replacing the probe positioning plate (6) instead of changing other parts when the distribution of contacts using different chips (1) is changed, thus greatly enhancing the processability of the test jack and lowering cost.

The invention relates to a harness connector. The harness connector comprises a metal shell, wherein the metal shell is provided with an outer edge and a plurality of inner holes, the interior of each inner hole is partitioned to a front segment and a rear segment by a protruding edge, a shielding ring, a shielding belt and a fixed claw are arranged in the front segment, the shielding belt sleeves a front part of the shielding ring, the fixed claw sleeves a rear part of the shielding ring, a cable sealing body is arranged in the rear segment, and a rear cover is also arranged at a rear part of the metal shell. The harness connector is low in cost and is easy to assemble and reliable to connect and seal, and a shielding layer is reliable to connect with ground. A harness connection wiring method is also provided.

The embodiment of the invention relates to a structure for preventing an electronic element from interference and a mobile terminal. The structure comprises at least one shielding case, wherein the shielding case is provided with an upper wall and a peripheral side wall, and is matched with a printed circuit board provided with an electronic element to form an accommodating space so as to accommodate the electronic element in the accommodating space, thus preventing the electronic element from interference; and the printed circuit board is arranged on the shielding case; the lower part of the side wall of the shielding case is provided with a part capable of conducting electricity, the part capable of conducting electricity is in reliable contact with the printed circuit board under the action of the outside pressure borne by the shielding case, and the shielding case is earthed. In the embodiment of the invention, the structure can effectively prevent the electronic element from interference, and the shielding case in the structure can be in reliable contact with the printed circuit board by means of the part capable of conducting electricity under the action of the outside pressure, thus the shielding case and the printed circuit board can be in reliable contact to realize reliable earth connection on the premise of not adding any SMT (surface mounted technology) welding process.

In a wiper motor including a motor body and a reduction gear apparatus, an accommodating case is integrally provided on a brush holder provided to the motor body, and this accommodating case is disposed on an outer face of a gear case so as to project from a motor yoke. A noise-preventing element including a pair of choke coils and a bidirectional varistor is accommodated in the accommodating case, and the noise-preventing element is connected between a power-feeding terminal of a connector provided on the gear case and brushes. Noises acting on a power-feeding circuit are absorbed by the noise-preventing element and noises which have leaked to the outside via an opening portion of the motor yoke are absorbed by the noise-preventing element.

The invention provides a socket for connecting high-voltage cables. Pins in the socket are used for conducting electricity, and an insulation sleeve is used for preventing electricity leakage; the invention further provides plugs for connecting the high-voltage cables, inserting hole pieces in the plugs are used for being matched with the pins and the cables, and other components are used for preventing electricity leakage; the invention further provides a pluggable device for connecting the high-voltage cables. The pluggable device comprises the socket and the plugs and is used for connecting broken cables, and through a sealing structure and various grounding measures, the pluggable device can have excellent anti-explosion performance and is convenient to dismantle and install.

An intelligent alternative-direct-current integrated power supply system comprises a two-power-supply automatic switching device, an inversion module and a main monitor, which form an alternative-current / direct-current uninterrupted power supply system containing a uniform monitoring management function. By adopting a layered distributive architecture, the dispersed measure and control and centralized management can be realized. A communication storage battery group and a charging device are canceled, a direct-current / direct-current (DC / DC) conversion module is directly hung on a charging bus; an uninterrupted power supply (UPS) storage device is canceled, the inversion module is directly hung on the charging bus, and the inversion power supply is adopted for powering important loads such as a computer and accidental illumination; and the secondary power distribution management, the station power supply device intelligent management and state examination are uniformly carried out. The alternating current and direct current, the inversion and the communication power supply system of an entire transformer substation power supply can be uniformly monitored on one platform, the human resource can be uniformly dispatched, and the integral management level of the station power supply can be improved.

The invention discloses a semiconductor device test system and a test method thereof. The test system comprises an upper computer, an oscilloscope, a main control system PLC, a circuit control moduleand a test box body. An automatic tool is arranged in the test box body, a tested piece is placed on the automatic tool, and a test fixture is arranged right above the tested piece. The automatic toolcomprises a driving device, the driving device drives the automatic tool to move so as to drive the tested piece to be connected with the test fixture, and the main control system PLC is connected with the test box body, the test fixture, a main circuit unit and a gate pole driving unit. The upper computer is connected with the oscilloscope, and the oscilloscope is connected with the test box body. The advantages of the present invention are that the semiconductor device test system with a specific testing circuit and a testing system structure is designed, the theory is combined with the practice, and all devices in the system are matched with one another to test the semiconductor device.

The invention provides a switch cabinet comprising a bus room, an instrument room, a mechanism room, a cable room, a switch room and a pressure-releasing channel. The front cabinet of the switch cabinet is formed by the instrument room, the mechanism room and the cable room. The rear cabinet of the switch cabinet is formed by the bus room, the switch room and the pressure-releasing channel. The switch room is internally provided with, from the top to the bottom in turn, an upper inlet wire insulator group, a circuit breaker assembly, a grounding switch and a lower outlet wire insulator group. Function room areas in the front cabinet and the rear cabinet are distributed in a step way. The circuit breaker assembly comprises a supporting frame, a circuit breaker, an operation member and a sealing member. When the circuit breaker assembly is arranged in the switch cabinet, the switch room is sealed by the sealing member. The circuit breaker assembly can be moved out of the switch room and the mechanism room by the supporting frame to be detected and maintained. The switch cabinet has advantages of a fixed cabinet, a mid-arranged type handcart cabinet and an inflation cabinet, integral units and buses are designed in a modularized way, and installation and maintenance are safe and simple.

A hub generator for bicycle that can be correctly grounded and supply electricity. A hub generator for bicycle includes a hub casing rotating along with the front wheel (4) and affixed with a magnet around an axle surrounded by a generating coil (21), where the rotation of the front wheel (4) would generate electricity. This invention is characterized in that: the power supply line (23) for supplying electricity generated by the generating coil and the grounding of the generating coil (21) serve as a power supply socket (18) provided outside of the hub casing (18). To supply electricity to the electrical components of the bicycle, the power supplying wire (26) and the grounding wire (26) are connected to the power supply socket (18) so as to supply electricity to the electrical components without damaging the bicycle frame while ensuring conduction of electricity.

A swivel bracket is coupled via a horizontal bracket to a clamp bracket to be mounted on a vessel. A trim mechanism adjusts a trim angle of an outboard motor by rotating the swivel bracket about the horizontal shaft. The trim mechanism includes a trim cylinder coupled to the clamp bracket and a trim rod that is projectable and retractable from the trim cylinder. A thrust receiver is attached to the swivel bracket. The thrust receiver receives a load from the trim rod. The thrust receiver is grounded. The thrust receiver includes a conducting portion in contact with the trim rod.

The embodiment of the invention provides an electromagnetic shielding film, a circuit board and an electromagnetic shielding film preparation method; the electromagnetic shielding film comprises a first shield layer, a second shield layer, a glue film and a plurality of convex particles; the first shield layer comprises a first surface and a second surface arranged in opposite; the second surfaceis a flat surface; the plurality of convex particles are attached to the second surface of the first shield layer; the second shield layer is configured on the second surface of the first shield layer, and covers the plurality of convex particles, thus forming convex portions, matched with the convex particles, on the outer surface of the second shield layer, and forming gentle portions on other positions; the glue film is configured on outer surface of the second shield layer, so the convex portions can ensure the shield layer to smoothly penetrate the glue film in lamination, thus ensuring interference charges to be normally conducted; in addition, the gentle portion of the second shield layer can reduce the insert loss in usage process; the electromagnetic shielding film is suitable forultrahigh frequency transmission.

A method and diagnostic device are disclosed which can receive process variable values (x(t)) of a process variable of a process medium of a process, and extract and record measurement statistics data from such process variable values, which are measured during a measuring phase. Training statistics data can be extracted and recorded from such process variable values, which are measured during a training phase. The measurement statistics data can be compared with training statistics data recorded before the measurement statistics data. The training statistics data can include a training empirical statistical distribution, which can be a distribution of a function of process variable values, which are measured during a training phase, or a distribution of a function of coefficients Xt(k), which are coefficients of a function of a transform of process variable values (x(t)), which are measured during a training phase.

The invention belongs to the technical field of power detection and particularly relates to a novel ground wire clamp which comprises a clamping part, a connecting part and an operating rod. The clamping part is connected to the operating rod through the connecting part to form an L-shaped structure. A limit mechanism is arranged between the connecting part and the clamping part. The clamping partis provided with a hook clamp and a pushing clamp. The hook clamp is provided with a wiring hole and is slidingly connected to the pushing clamp. One end of the pushing clamping is movably connectedto the connecting part. The other end of the pushing clamp is slidingly connected to the hook. One end of the limit mechanism is fixedly connected to the hook, and the other end of the limit mechanismis movably connected to the connecting part. The connecting part is movably connected to the operating rod. According to the novel ground wire clamp, through the principle of a rotating shaft of a helical gear, a wiring clamp and a manual rotation operation rod are separated to form a core component which is an L-shaped operation mechanism, and a convenient grounding mode of a lead conductor in avertical direction is realized.