39results about How to "Same polarity" patented technology

The invention relates to an electricity generation device for an oil gas pipeline monitoring system, belonging to the field of oil gas pipeline monitoring and piezoelectric electricity generation. The electricity generation device is characterized in that a left end cover is arranged at the outer side of a pipeline; a shell is fixed between the left end cover and a right end cover; a piezoelectric transducer is sleeved on the inner wall of the shell, and the piezoelectric transducer is formed by adhering a metal base plate and a piezoelectric crystal plate; different magnetic poles of a pair of fixed magnets are oppositely arranged on the free end of the piezoelectric transducer; a main shaft is arranged on the left end cover and the right end cover through a bearing; an impeller is arranged on a main shaft end and placed in a pipeline; and a main shaft spline is sleeved with a magnet ring 1 and a magnet ring 2 which are provided with protruded teeth and opposite radial polarization directions. In the invention, the kinetic energy of an oil gas is converted into electric energy by utilizing the piezoelectric transducer, and therefore, reliable and sufficient energy can be obtained without paving cables or batteries; and the piezoelectric transducer is excited in a non-contact way and protected through two-way magnetic coupling action, and therefore, high reliability is achieved and higher electricity generation capacity is achieved during high rotating speed, lower rotating speed and constant rotating speed of the main shaft.

A resistance variable element of the present invention and a resistance variable memory apparatus using the resistance variable element are a resistance variable element (10) including a first electrode, a second electrode, and a resistance variable layer (3) provided between the first electrode (2) and the second electrode (4) to be electrically connected to the first electrode (2) and the second electrode (4), wherein the resistance variable layer (3) contains a material having a spinel structure represented by a chemical formula of (Zn_xFe_1-x)Fe₂O₄, and the resistance variable element (10) has a feature that an electrical resistance between the first electrode (2) and the second electrode (4) increases by applying a first voltage pulse to between the first electrode (2) and the second electrode (4), and the electrical resistance between the first electrode (2) and the second electrode (4) decreases by applying a second voltage pulse whose polarity is the same as the first voltage pulse to between the first electrode (2) and the second electrode (4), and a resistance variable memory apparatus using the resistance variable element (10).

The invention discloses a multilayer segmented built-in permanent magnet synchronous motor used for electric automobile driving. A built-in rotor part comprises a rotor iron core, a three-layer segmented neodymium-iron-boron magnetic steel and a magnetic barrier. By optimizing a pole-arc coefficient of every layer of a permanent magnet, the harmonic content of the gap flux density of the built-in permanent magnet synchronous motor is minimized, and therefore the torque ripple and the iron core loss of the built-in permanent magnet synchronous motor are reduced. By adopting the multi-layer mechanism, the salient pole rate of the motor reaches more than three, and the flux weakening capability of the motor is improved. Each permanent magnet is divided into four segments, and therefore the eddy current loss of the permanent magnet is reduced, the heating of the permanent magnet is reduced, and an anti-irreversible demagnetization capability is improved, and the reliability of the motor is improved. Compared with the prior art, the torque ripple and the iron core loss of the permanent magnet synchronous motor, and the permanent magnet eddy current loss are reduced, and the noises of the operation of the motor are reduced, and the operation efficiency and the reliability of the electric automobile driving motor are improved.

The invention discloses a method for driving a double-gate liquid crystal display panel. The method comprises the following steps of: sequentially classifying four scanning lines into one group; at a first period of time, switching on a first scanning line, inputting a first pre-charging signal into a pixel unit connected with the first scanning line, switching on a second scanning line, inputting a first information signal into the pixel unit connected with the first scanning line, inputting a second pre-charging signal into a pixel unit connected with the second scanning line, switching off the first scanning line and keeping the second scanning line on, inputting a second information signal into the pixel unit connected with the second scanning line and switching off the second scanning line; and at a second period of time, switching on a third scanning line, inputting a third pre-charging signal into a pixel unit connected with the third scanning line, switching on a fourth scanning line, inputting a third information signal into the pixel unit connected with the third scanning line, inputting a fourth pre-charging signal into a pixel unit connected with the fourth scanning line, switching off the third scanning line and keeping the fourth scanning line on, inputting a fourth information signal into the pixel unit connected with the fourth scanning line and switching off the fourth scanning line, wherein the pre-charging signal and the information signal of each pixel unit have the same polarity.

The invention discloses a non-polarity safe charger circuit which is composed of a live line and zero line identification circuit, a resistor-capacitor (RC) phase shift trigger circuit, a silicon controlled charging circuit and a polarity identification circuit, wherein the live line and zero line identification circuit can be used for identifying a live line and a zero line at an input end of an alternating current; the live line at the input end of the alternating current is connected to an input end of the silicon controlled charging circuit, so that the live line is not directly connected with the polarity output end; the zero line is directly connected with the polarity output end through a switch, so that the security coefficient is improved; the size of charging current of the silicon controlled charging circuit is controlled by the RC phase shift trigger circuit; the size of the charging current is adjusted; and operation of the RC phase shift trigger circuit or the live line and zero line identification circuit is controlled by the polarity identification circuit, so that the silicon controlled charging circuit charges according to the correct storage battery polarity, the storage battery or the charger cannot be burned, and the non-polarity safe charger circuit is safe and reliable.

The invention provides a gear-rack steering gear. The gear-rack steering gear comprises a steering input shaft, a rack, a first pull rod, a second pull rod and a rack shell, wherein one end of the steering input shaft is provided with a gear matched with the rack, a first inner ball head is arranged at the first end of the rack, a second inner ball head is arranged at the second end of the rack, the first pull rod and the first inner ball head are movably connected, the second pull rod and the second inner ball head are movably connected, the rack shell is provided with a passage penetrating through the two ends of the rack shell, the rack penetrates through the passage and extends out of the two ends of the rack shell, a first magnet is arranged on the first inner ball head, a second magnet is arranged on the end face, close to the first inner ball head, of the rack shell, opposite faces of the first magnet and the second magnet have the same polarity, a third magnet is arranged on the second ball head, a fourth magnet is arranged on the end face, close to the second inner ball head, of the rack shell, and opposite faces of the third magnet and the fourth magnet have the same polarity. The gear-rack steering gear cannot make metal crash noise during steering.

A data I/O apparatus for use in a memory device. The data I/O apparatus for use in the memory device performs data transmission using the same polarity when neighbor global I/O lines have opposite polarities to reduce coupling noise generated between global I/O lines acting as data I/O lines of a memory device, performs data recovery, and basically deletes the coupling noise, such that it reduces the failure rate of the memory device.

The invention relates to a cascaded step-down DC-DC converter. The cascaded step-down DC-DC converter comprises a capacitor energy storage module 1, a capacitor energy storage module 2, ... a capacitor energy storage module n, an inductor L1, an inductor L2, ... an inductor Ln+1, and a capacitor Co, wherein the capacitor energy storage module j comprises a diode Dj_1, a capacitor Cj_1, a diode Dj_2 and an electronic switch Sj, the electronic switch Sj comprises a diode Dj_3, an N type MOS transistor Mj_1, and a controller j, wherein j is between 1 and n. Working characteristics of the cascadedstep-down DC-DC converter are as follows: the converter has a simple circuit structure, is easy to expand, can be controlled by diversified methods, and is efficient, input and output currents are continuous, output and input voltages are common-grounded and are consistent in polarity, and an output voltage Vo is less than or equal to a DC power supply voltage Vi.

The invention provides an anti-theft power distribution cabinet with a buffer protection function. The anti-theft power distribution cabinet comprises a cabinet body, a mounting plate is arranged at the bottom of the interior of the cabinet body, and the lower side of the mounting plate is connected with the bottom of the interior of the cabinet body through a damping rubber pad. A first guiding block is fixedly connected to the middle of the lower side of the mounting plate, the cross section of the first guiding block is in an isosceles trapezoid shape, two second guiding blocks are disposedunder the first guiding block, the cross section of each second guiding block is in a right-angled trapezoid shape, and the inclined surfaces of the second guiding blocks are in contact with the inclined surfaces of the first guiding block. A buffering device is connected to one side of each second guiding block. The anti-theft power distribution cabinet has the advantages that the first guidingblock moves downward, the second guiding blocks matched with the first guiding block move to both sides, correspondingly a buffering column drives a moving plate to move, the moving plate to extrudeshydraulic oil, and the hydraulic oil slowly flows out through first through holes, so that the moving speed of the moving plate is greatly decreased, and a certain buffering effect is achieved.

The invention discloses a high electron mobility transistor and a preparation method thereof, and belongs to the technical field of semiconductors. The high electron mobility transistor comprises a Sisubstrate, a plurality of AlN seed crystals, AlN buffer layers, a GaN channel layer, an AlGaN barrier layer, a source electrode, a drain electrode and a grid electrode; the multiple AlN crystal seedsare uniformly distributed on the first surface of the Si substrate; the AlN buffer layer is arranged on the AlN seed crystals and fills the space among the AlN seed crystals, and the AlN buffer layers on the respective AlN crystal seeds have the same crystal orientation; the GaN channel layer and the AlGaN barrier layer are sequentially stacked on the second surface of the AlN buffer layer, and the second surface is a plane; the source electrode, the drain electrode and the grid electrode are arranged on the AlGaN barrier layer separately, the source electrode and the drain electrode are in ohmic contact with the AlGaN barrier layer; and the grid electrode and the AlGaN barrier layer form schottky contact. According to the transistor, the crystal quality of the GaN channel layer can be improved.

The present invention provides a common voltage generation circuit. The common voltage generation circuit receives a first common voltage and a second common voltage, outputs a first alternating current common voltage and a second alternating current common voltage with opposite poles according to polarity-reversal control signals, and polarities of data signals output on corresponding data linesof the first alternating current common voltage or the second alternating current common voltage and the source drive circuit are consistent, and the data signals and the alternating current common voltages with the consistent polarity to the data signals are commonly acted the same pixel unit of a display panel. The present invention further provides a source drive circuit and a liquid crystal display device. The common voltage generation circuit, the source drive circuit and the liquid crystal display device allow the polarities of data signals output on corresponding data lines of the firstalternating current common voltage or the second alternating current common voltage and the source drive circuit to be consistent so as to avoid the generation of the inverse phenomenon on the liquidcrystal display panel.

The invention discloses a full-automatic sleeve pin-shearing method for a lithium battery and a sleeve pin-shearing machine; the full-automatic sleeve pin-shearing method for the lithium battery comprises the following steps of step 1, placing the lithium battery into a fine seam conveying device, so as to smoothen the pin postures of the lithium battery; step 2, transferring the lithium battery to a pin arranging device to perform pin arranging on the lithium battery; step 3, transferring the lithium battery to a polarity detection device before phase change for judging whether the polarity is staggered or not; and step 4, transferring the lithium battery to a polarity conversion clamp, wherein if the polarity detection device judges that the polarity is not staggered, the polarity conversion clamp does not rotate; and if the polarity detection device judges that the polarity is staggered, the polarity conversion clamp rotates by 180 degrees. The lithium batteries can be orderly arranged through simple conveying, pin arranging, detection and steering steps, and the polarity of the pins of the lithium batteries is the same as the preset polarity, so that the problems of skewing andpolarity dislocation are avoided, the product can enter a sleeve process smoothly, and the product yield is improved.

The invention provides a liquid crystal display panel and a driving method and device thereof, belongs to the technical field of display, which can at least partially solve the problem of display defects caused by an existing liquid crystal display panel driving method. The invention discloses a driving method of a liquid crystal display panel. According to the method, driving signals are provided for all sub-pixels in each frame through data lines, the polarities of the driving signals of the sub-pixels connected with the same data line in each frame are the same, and the method comprises the steps that in the first stage, an even number of frames are included, and the polarities of the driving signals of any sub-pixel in any two adjacent frames are opposite; In the second stage, an evennumber of frames are included, and the driving signal polarities of any two adjacent frames of any sub-pixel are opposite; Wherein the polarities of any sub-pixel in the last frame of the first stageand the first frame of the second stage are the same; In the first frame of the second stage, the drive signal of at least part of the sub-pixels is determined by the original signals of the sub-pixels in the last frame of the first stage and in the first frame of the second stage.

A hydraulic support crane based on the principle of hydraulic buffering includes a support beam, four hydraulic outriggers are arranged on the lower side of the support beam, the hydraulic outriggers include a cylinder, and the lower end of the cylinder is connected to the cylinder bottom, so the The cylinder barrel contains a piston rod, a hydraulic cylinder displacement sensor is installed at the end of the piston rod, the vent hole plug is located on the left side of the upper part of the cylinder barrel, the guide sleeve is located at the outlet of the upper end of the cylinder barrel, a cylinder cover is installed on the upper part of the cylinder barrel, and the inside of the cylinder cover A hydraulic oil leakage recovery device is provided; it also includes a trolley, a traveling wheel is installed at the bottom of the trolley, a track is installed on the upper end surface of the support beam, and the traveling wheel is located in the track; a buffer device. The beneficial effect of the invention is to increase the two-way hydraulic lock, which is formed by two single-way hydraulic valves connected in series in reverse, which prevents the hydraulic oil from flowing backwards and the retraction of the piston rod when the hydraulic outrigger is working.

The invention discloses a directional feeding device for a different-polarity foot capacitor. The directional feeding device comprises a vibration disk, a column-regulating device, a positioning device and an orientating device which are arranged in sequence, wherein the orientating device comprises a base and two first limiting bars; the two first limiting bars are oppositely and fixedly arrangedon the base to form a first conveying slot of the capacitor; a first positioning bar is arranged on the base between the two first limiting bars; a neutral position of the first orientating bar is formed at a tail end of each first limiting bar; a CCD (Charge Coupled Device) is fixedly arranged on the first limiting bar on one side of the neutral position; a probe of the CCD is dead against the first conveying slot; and a back side of the CCD is provided with a rotation assembly and an interception assembly. Through adoption of the directional feeding device for the different-polarity foot capacitor provided by the invention, capacitors with different-polarity feet can be smoothly transported through the vibration disk, and capacitors of which the polarities are different from a preset polarity are rotated on the orientating device in order to keep the polarities of the capacitors consistent, so that subsequent production can be performed normally.

The invention discloses a magnetic disk spring support hanger and belongs to the field of pipeline erecting. The magnetic disk spring support hanger comprises a top plate, a shell and a bottom plate;the center of the top plate is provided with an upper pull rod; the front face of the shell is provided with a data plate displaying the stretching depth; the center of the interior of the shell is provided with a disk spring set, magnets are arranged in opposite assembling space of the disk spring set, a middle pressing plate is fixed to the upper portion of the disk spring set, and locking pintsare installed on the two sides of the middle pressing plate; and the center of the bottom plate and the center of the disk spring set are provided with a loading hanger rod, the loading hanger rod isfixedly connected with the middle pressing plate through a nut, and the tail end of the loading hanger rod is provided with a fastening nut. The magnetic disk spring support hanger is simple in structure and high in anti-pressure capacity.

The present invention provides a method and a circuit device for a laser control loop, having automatic adaptation for monitoring signal polarity. SOLUTION: By utilizing a single step method, a signal which is generated by a monitor during the starting step of a laser control loop is compared with a reference value. On the basis of the result of the comparison, the signal generated by monitor is fed to a comparator which controls optical output of a laser during the start step of the laser control loop, directly or after inversion. An inverted monitoring signal is fed first to the comparator which controls an arbitrary output by a method, which is irrespective of monitoring signal polarity and depends on polarity of the reference value. Alternatively, the monitoring signal is fed directly, and a signal which feeds the monitoring signal through a non-inverted manner with regard to the monitoring signal reaching the reference value is generated.