55results about How to "Eliminate potential difference" patented technology

An electrical potential difference between a slider body and a hard disk of a hard disk drive is eliminated based on the flying-height spacing of the slider body between the slider body and the hard disk. A predetermined bias voltage is applied between the slider body and the hard disk that includes a DC component and an AC component and that is based on the detected flying-height spacing of the slider body. The flying-height spacing can be detected based a minimum slider-to-disk clearance change from a design flying height of the slider at a frequency of the AC component as the DC component of the predetermined bias voltage is varied. Alternatively, the flying-height spacing can be detected based on a minimum electrodynamic response of the slider to a first harmonic of the AC frequency of the AC component as the DC component is varied.

The invention provides an electric field fingerprint recognition device, a state control method thereof and a prosthesis identification method. The electric field fingerprint recognition device comprises a signal acquisition module and a signal processing module. When a measurement state signal processing unit is electrically connected with a signal acquisition unit, a to-be-measured state signal processing unit is at least electrically connected with at least one signal collection unit at the periphery of the measurement state signal processing unit. The charging and discharging processes of a sensing capacitor which is electrically connected to the measurement state signal processing unit and the to-be-measured state signal processing unit, and the charging and discharging quantity of electricity of a parasitic capacitor between the measurement state signal processing unit and the to-be-measured state signal processing unit is inhibited. The device and the methods have the advantages of simple structure and saving of device cost, a problem of mutual interference between signal collection units is avoided, the fingerprint recognition device can be suitable for various application requirements, a prosthesis finger fingerprint can be judged, and the safety and the reliability of the fingerprint identification device are improved.

The application discloses an impressed current catholic protection device for a ship. The device comprises a power supply unit, a reference electrode, a plurality of auxiliary anodes and an automatic grounding controller, wherein the power supply unit comprises an output unit with a plurality of output terminals and a control unit connected with the output unit; the automatic grounding controller is arranged between a propeller axis and a ship body; the auxiliary anodes are arranged on the outside of the ship body and are respectively connected with the output terminals of the output unit; the ship body is connected with the input terminals of the output unit; the reference electrode is arranged on the ship body between each two adjacent auxiliary anodes; and the control unit is used for regulating the output current of the output unit. According to the impressed current catholic protection device for the ship, the automatic ground controller arranged between propeller axis and the ship body is not only capable of detecting the potential difference between the ship body and the propeller axis, but also capable of automatically outputting proper current to remove the potential difference when detecting the potential difference and consequently keeping the potential difference between the ship body and the propeller axis close to zero.

An electrical potential difference between a slider body and a hard disk of a hard disk drive is eliminated based on the flying-height spacing of the slider body between the slider body and the hard disk. A predetermined bias voltage is applied between the slider body and the hard disk that includes a DC component and an AC component and that is based on the detected flying-height spacing of the slider body. The flying-height spacing can be detected based a minimum slider-to-disk clearance change from a design flying height of the slider at a frequency of the AC component as the DC component of the predetermined bias voltage is varied. Alternatively, the flying-height spacing can be detected based on a minimum electrodynamic response of the slider to a first harmonic of the AC frequency of the AC component as the DC component is varied.

A static resistant reticle comprises a substrate and a patterning layer and is covered by an antistatic conductive film of quaternary amine (R₄N)⁺Cl⁻. A pellicle structure comprising an optically transparent membrane tightly stretched on a frame is also coated by an antistatic electro conductive film of a similar material. The reticle with the pellicle form a shielded structure isolating the reticle from ESD.

The invention provides a continuous wave power probe, comprising a microwave detection circuit A1 and a large dynamic range detection voltage processing circuit A2, wherein the microwave detection circuit A1 is positioned on a gallium arsenide substrate and sealed in a cavity, and the large dynamic range detection voltage processing circuit A2 is positioned in a printed circuit board and sealed by a metal shell. The continuous wave power probe based on MMIC technology and with the dynamic range of 90 dB, provided by the invention, is connected to a continuous wave power meter host by a cable, thus achieving that the dynamic range of the single probe with the frequency range of 10MHz-18GHz reaches 90dB, and also achieving accurate measurement of the continuous wave power.

In the TSC structure, a first dielectric layer is formed over the first major surface of the substrate. The substrate includes opposing second major surfaces. A TSC is formed in the first dielectric layer and the substrate such that the TSC passes through the first dielectric layer and extends into the substrate. A conductive plate electrically coupled to the TSC is formed over the first dielectric layer. An isolation trench is formed in the substrate to surround the conductive plate and is spaced apart from the conductive plate. A second dielectric layer is formed on the second major surfaceof the substrate. A plurality of first through holes extending into the substrate and connected to the TSC are formed in the second dielectric layer. A plurality of second through holes extending intothe substrate but not connected to the TSC are formed in the second dielectric layer.

The invention belongs to the motor field and discloses a motor bearing electric corrosion-prevention structure and a plastic packaging brushless direct current motor. The motor bearing electric corrosion-prevention structure includes a rotating shaft, a first bearing installed at one end of the rotating shaft, a first bearing supporting frame which sleeves the first bearing, an electric conduction cover which is in electric conduction connection with the first bearing supporting frame, an elastic electric conduction assembly which is electrically connected between the electric conduction cover and the rotating shaft; the electric conduction cover sleeves the first bearing supporting frame; the rotating shaft is provided with an extension portion which extends out from the interior of the first bearing supporting frame and extends into the electric conduction cover; and the elastic electric conduction assembly is installed in the electric conduction cover and is elastically connected between the electric conduction cover and the extension portion. According to the motor bearing electric corrosion-prevention structure of the invention, the electric conduction cover and the elastic electric conduction assembly are adopted, so that electric conduction connection between an inner peripheral support and an outer peripheral support of the first bearing can be realized, and potential difference between the inner peripheral support and the outer peripheral support of the first bearing can be eliminated, and electric corrosion of the first bearing can be avoided, and the first bearing can have the advantages of low manufacture cost, high shock resistance and high load capacity.

The invention relates to a surge protector with long service lifetime and high protection. The surge protector comprises a current output outer cylinder, wherein a zinc oxide piezoresistor substrate is arranged at an internal bottom part of the current output outer cylinder, a pressure bearing ring, a polarity cross cap and a T-shaped isolation sleeve are sequentially arranged on the piezoresistor substrate, an induction coil is wound around the pressure bearing ring in a matching way, a current transmission end of an induction coil is connected with a passive current comparison module by two groups of wiring caps, and the piezoresistor substrate, the polarity cross cap and the induction coil are pressed in the current output outer cylinder by a hole elastic baffle ring to form a whole current discharge passage. The surge protector has the advantages of reasonable structure, reliable working performance, good protection effect, long service lifetime and the like, and is convenient to operate, and the development trend for effect improvement of a current surge protector and the increasingly market demand can be satisfied very well.

A connector device including: a plug connector provided with a plurality of plug terminals, a plug housing holding the plurality of plug terminals along a longer direction, and a plug shell held on the plug housing; and a receptacle connector provided with a plurality of receptacle terminals, a receptacle housing holding the plurality of receptacle terminals along the longer direction, and a receptacle shell held on the receptacle housing. The plug shell and the receptacle shell are electrically connected in a state in which the plug connector and the receptacle connector are mated together.

The invention relates to a grounding device of a variable-frequency motor which belongs to a motor grounding device in particular. The device is characterized in that the device includes a bearing component, a carbon brush device, a brush frame cover and a rotary shaft; the rotary shaft is mounted in the brush frame cover and is supported by the bearing component; the carbon brush device is fixed on the bearing component through a bolt; the brush frame cover is fixed on the bearing component through a bolt; the carbon brush device includes a down-lead, a carbon brush frame, a bolt, black lead and a brush frame mounting plate; the carbon brush is fixed on the brush frame mounting plate through the bolt; the black lead is connected with the brush frame mounting plate; the down-lead is connected with the brush frame mounting plate through the bolt. The invention has a simple, compact and reasonable structure; the damage of a shaft circuit to the bearing and the rotary shaft can be great reduced; the service life of the motor can be prolonged, and the potential difference between the inner ring and the outer ring of the bearing can be removed.

The invention discloses a resin casting terminal busbar, which comprises a casting body, the casting body is provided with a phase-separation block group, the number of the phase-separation block groups is multiple, and the plurality of phase-separation block groups are cast on the casting body in parallel, symmetrical and equidistant The center of the inner side; the plurality of phase-separated block groups are composed of a first phase-separated block, a second phase-separated block and a third phase-separated block. The casting body of the resin casting terminal busbar is made of insulating resin, with high protection level. The first phase separation block, the second phase separation block and the third phase separation block are all molded with DMC material, which has high strength, corrosion resistance, The advantages of impact resistance, arc resistance and smoothness; the tin plating on the surface of both ends of the copper bar can eliminate the potential difference formed by the copper and aluminum joints due to the unequal number of electrons; the overall protection level is high, high strength, and arc resistance.

A communication device includes a first housing having a first substrate and a second housing having a second substrate, wherein the first substrate and the second substrate are connected by a signal wire including a plurality of thin electric wires, each of which is made of a conductor covered with an insulator, the plurality of thin electric wires forming the signal wire are tied in a bundle at a center portion except the ends thereof and covered with a ground wire mesh made of a plurality of conductive wires knitted into a mesh structure and the ends of the ground wire mesh are connected to the first substrate and the second substrate, respectively.

The invention provides a bearing structure and a motor. The bearing structure comprises a bearing outer ring (1), a bearing inner ring (2), a rolling body (3) and a conductive structure, the bearing inner ring (2) is sleeved with the bearing outer ring (1), the rolling body (3) rolls in a raceway formed by the bearing outer ring (1) and the bearing inner ring (2), and the conductive structure is arranged between the bearing outer ring (1) and the bearing inner ring (2) and conductively connects the bearing inner ring (2) and the bearing outer ring (1). According to the bearing structure, the potential difference of the bearing inner ring and the bearing outer ring can be effectively eliminated, and the electric corrosion resistance of a bearing is ensured.

The invention provides a metal wiring film, a manufacturing method thereof and a thin film transistor. The metal wiring film comprises first, second and third film layers, the first film layer is madeof nickel-copper alloy in which the mass percent of nickel is between 30% and 70%, the second film layer is positioned on the first film layer, and made of aluminum-neodymium alloy in which the masspercent of neodymium is between 1% and 5%; and the third film layer is positioned on the second film layer and made of a material the same with that of the first film layer. The metal wiring film caneliminate a potential difference therein, and is avoided from electrolytic etching.

The invention relates to the field of motor, and discloses a motor and an electrical conduction device for the motor. The electrical conduction device can be arranged between an end cover (21) and a shaft (22) of a motor (20) to electrically connect the end cover (21) and the shaft (22). The electrical conduction device includes a fixing piece (10) used for being connected with the end cover (21), and a contact piece (12) used for electrically contacting the shaft (22). The contact piece (12) is fixedly connected to the fixing piece (10) through a connecting piece (11), and can be pressed on the shaft (22). The electrical conduction device of the invention can electrically connect the inner and outer rings of motor bearings to eliminate the potential difference between the inner and outer rings of the bearings. Therefore, the problem that the bearings are damaged due to electric erosion is solved.

The invention relates to an electric energy storage stapling machine, comprising a box which contains a control switch and a circuit, a motor, a gear group for reducing speed and increasing force, and a wheel. The last wheel of the gear group is concentric with the wheel and connected via an eccentric axle, the box contains sliding engaged staple groove and stapling device with some angle, the box contains a flexible energy storage device, a locking releaser for locking and releasing the stapling machine, the middle of the flexible energy storage device is hinged between two inner side walls of the box while its outer end is hooked on the stapling machine and inner end is directly or indirectly hinged on the eccentric axle, the circumference of the wheel is disposed with a dial block for dialing block and locking block and a dial rod for dialing the control switch. The invention has low demand on motor power, and low cost, which it can avoid destroying motor in clamped condition.