127results about How to "Improve hysteresis" patented technology

The invention relates to a foamed fluoropolymer, preferably a polyvinylidene fluoride (PVDF) structure, such as from Kynar® resins. The foamed structure is continuous self-supporting, sized, and has a dense skin. The foamed structure is manufactured in a process using foaming agents and nucleating agents. The structure is sized into a specific shape during the manufacturing process—requiring a good melt viscosity of the PVDF foam. In one process, a master batch containing the nucleating agent is used. The foamed article could be a sheet, film, profile, tube, pipe, article, rod foam-core structure, or other self-supporting shape. Foamed tubes, pipes, rods, sheets and conduit are especially useful. The foamed structure of the invention provides added value by being lighter weight, more flexible, and more impact resistant than a comparable non-foamed PVDF structure. It also has increased hysteresis, increased insulation properties, reduced dielectric constant, and increased compressibility.

The invention provides a method for preparing a perovskite solar cell on the basis of a two-dimensional material graphene-phase carbon nitride. The graphene-phase carbon nitride is doped into a perovskite precursor solution to prepare the perovskite solar cell. The method has the following advantages that (1) the raw material required for synthesis of the material is low in cost, and the product is small in toxicity; (2) solvent volatilization during the annealing process is effectively slowed down, so that a perovskite thin film crystal is more uniform and compact; (3) the grain crystal sizeof a perovskite layer is increased, a crystal boundary easy to combine with charge is effectively reduced, and the filling factor of a device is improved; (4) a surface of the perovskite thin film ispassivated, and the hysteresis phenomenon of the device is effectively improved; and (5) the conductivity of the surface of the perovskite thin film is improved, the contact resistance of the interface is reduced, and the short-circuit current of the device is increased. The preparation process is simple and convenient and is low in preparation difficulty; by doping of the graphene-phase carbon nitride, the smoothness and the uniformity of the perovskite thin film can be effectively improved; and by a series of gradient doping, the device performance is remarkably changed.

A method and apparatus for detecting a zero crossing or desired phase angle of a power line signal having a variable amplitude uses a ratio between a peak amplitude of the power line signal and the amplitude of the power line signal at a desired phase angle for a known amplitude version of the power line signal to detect when a variable amplitude version of the power line signal is at the desired phase angle or zero crossing. The detection of the phase angle is used to determine if a notch is present in the power line signal. A substantially constant width pulse is generated if a notch is detected regardless of the amplitude of the power line voltage or current. The invention is particularly useful in a lighting system for generating and detecting pulses used to communicate information from a power line communication controller to a series of electronic ballasts over a power line used to power the ballasts. The information can be used to control a dimming function of the ballasts.

The invention belongs to the pneumatic artificial technical field, and particularly relates to double-tube sleeved type pneumatic artificial muscle.The double-tube sleeved type pneumatic artificial muscle comprises an elastic outer tube, outer cellosilk, an elastic inner tube, inner cellosilk, a first air pipe connector, a second air pipe connector, a gap, an inner tube cavity, a first clamp, a second clamp, a gap vent and an inner tube cavity vent.By controlling the relationship of air pressure in the gap and air pressure in the inner tube cavity, active axial contraction and active axial rotation of the double-tube sleeved type pneumatic artificial muscle are achieved.Compared with pneumatic muscle of the same model in the market, the double-tube sleeved type pneumatic artificial muscle has the advantage that air consumption is lower, so that energy saving is better achieved.The performance of the pneumatic muscle is improved and enriched, functional innovation and expansion are achieved, and the double-tube sleeved type pneumatic artificial muscle is worth application.

The invention provides an energy-saving effective permanent magnetic brushless rotation motor which starts and runs stably and has low cost. The motor owns two air gap magnetic fields at the magnetic poles of two ends; the deformed rotor permanent magnet or stator electromagnet leads the rotor magnetic pole (or stator magnetic pole) to be staggered by a certain of pole distance at the air gap magnetic fields of two ends; furthermore, the air gap magnetic field at one end of the motor is led to be less than the air gap magnetic field at the other end by technical means, thus leading the motor to keep directional rotation without a starting device. The rotor magnetic poles are intermittently arranged in pairs according to N, S and the like. The stator can be a conversion-typed stator and a commutation-typed stator; all coils at one end of the conversion-typed stator have the same polarity (N-pole or S-pole; the polarity of the coils at the other end are all S-pole or N-pole); the polarity of the magnetic pole of the commutation-typed stator coil is intermittently arranged in pairs according to N, S and the like; and the magnetic pole of the alternating current commutation-typed stator is intermittently arranged in pairs according to N, N, S, S and the like. The quantity of the rotor magnetic poles and the stator magnetic poles is configured according to the proportion of 1:1 or 1:2 or 2:3.

The invention provides a displacement measurement method based on piezoelectric ceramic open-loop modulation, belonging to the technical field of measurement. The displacement measurement method provided by the invention is characterized by comprising the following steps of: applying a periodic triangular wave driving voltage to piezoelectric ceramic to enable the piezoelectric ceramic to reciprocate; respectively finding out reference positions corresponding to a certain length of the piezoelectric ceramic in opposite movement directions and obtaining driving voltages corresponding to the reference positions; and calculating an average value of the driving voltages; and calculating a displacement amount to be detected by multiplying the change of the average value by gradients of middle section areas, which are close to be linear, in an average value curve of a displacement-driving voltage curve in the process of raising the driving voltages and a displacement-driving voltage curve in the process of decreasing the driving voltages under the driving of the periodic triangular wave driving voltage. The method provided by the invention has the advantages of effectively improving the hysteresis and the non-linearity of the piezoelectric ceramic and improving the precision of the displacement measurement; the displacement measurement can be realized by only carrying out open-loop control on the piezoelectric ceramic, so that the system complexity and the cost are not increased, the method is convenient to combine with other displacement measurement methods and the large-scale high-precision displacement measurement can be realized.

The invention provides a preparation method of a perovskite battery with an n-type doped electron transport layer and a TiO2 layer. The method comprises the following steps of: (1) FTO transparent conductive glass substrate cleaning and TiO2 thin film preparation: an upper TiO2 layer is deposited on a treated FTO transparent conductive glass substrate, and the FTO transparent conductive glass substrate with the deposited upper TiO2 layer is arranged in a drying oven for later use; (2) Bis-PCBM and DMC composite film preparation; (3) spin coating treatment on the FTO transparent conductive glass substrate with the deposited upper TiO2 layer; (4) perovskite film preparation; (5) Spiro-OMeTAD thin film preparation: a Spiro-OMeTAD solution is spin coated on the FTO transparent conductive glass substrate in step (4); and (6) MoO3 and Ag electrode preparation: an MoO3 electrode and Ag electrode are formed on a Spiro-OMeTAD thin film through evaporation. With the method of the invention adopted, the electron mobility and conductivity of a thin film can be improved; the photoelectric conversion efficiency of a device can be improved; the surface of the thin film is smoother, so that the thin film can be used as a good substrate for the deposition and growth of a perovskite layer in subsequent processes; and the degradation process of the perovskite layer can be slowed down, and the stability of the device can be improved.

The electroluminescent display device according to the present disclosure comprises a plurality of pixels. Each of the plurality of pixels comprises a driving element for generating a driving current, a light emitting element for emitting light according to the driving current, an emission controlling element for controlling a flow of the driving current between the driving element and the light emitting element, and a switching circuit for setting a first gate-source voltage of the driving element corresponding to the driving current based on a first data voltage during a first period and setting a second gate-source voltage of the driving element based on a second data voltage different from the first data voltage during a second period following the first period, wherein the second gate-source voltage is different from the first gate-source voltage, and wherein during the second period the emission controlling element is turned off.

The invention provides a pixel circuit, a pixel driving method and a display device. The pixel circuit includes a light-emitting element, a driving circuit, an energy storage circuit, an initialization circuit, a compensation control circuit, a light-emitting control circuit and a writing control circuit. Under the control of a first gate driving signal, the initialization circuit writes initialization voltage to the control end of the driving circuit to control that the driving circuit to lead the connection between its first end and second end. Under the control of a second gate driving signal, the compensation control circuit controls and leads the connection between the control end of the driving circuit and the second end of the driving circuit. The problem is solved that the threshold voltage compensation can not be carried out when a short-term residual image is effectively improved in the prior art.

The invention relates to a stepping motor-based automatic control system for an open degree of a throttle gate of an automobile. The system comprises an accelerator pedal position sensor for generating a voltage signal of the accelerator pedal position and transmitting the same to a throttle gate control unit ECU; the throttle gate control unit ECU which receives the voltage signal transmitted by the accelerator pedal position sensor and outputting a voltage signal of the stepping motor; the stepping motor which controls the open degree of the throttle gate according to the voltage signal of the stepping motor output by the throttle gate control unit ECU; and throttle gate position sensor which feeds an open degree signal of the throttle gate back to the throttle gate control unit ECU. When a driver operates the accelerator pedal, the throttle gate control unit ECU controls the open degree of the throttle gate according to the voltage signal of the accelerator pedal position sensor, so that an engine outputs the optimum torque. The air-fuel ratio can be precisely controlled, and hysteresis of the accelerator is remarkably improved, so that the emission performance of the engine is further improved.

The invention relates to a modified diene elastomer comprising predominantly the entity functionalized in the middle of the chain by an alkoxysilane group, optionally partially or completely hydrolysed to give silanol, bearing an epoxide function and the silicon atom of which bonds the two pieces of the chain, the chain ends of the modified diene elastomer being functionalized to at least 70 mol %, with respect to the number of moles of chain end, by an amine function.

A thin film transistor includes a gate electrode, a gate insulating layer, a source electrode, a drain electrode, and a channel layer. The gate electrode is disposed on a substrate, and the channel layer is electrically insulated from the gate electrode. The gate insulating layer is disposed between the gate electrode and the channel layer. The source electrode and the drain electrode are electrically connected with the channel layer. The channel layer includes a front channel layer proximate to a side of the gate insulating layer, a back channel layer proximate to a side of the source electrode and an intermediate layer between the front channel layer and the back channel layer. The oxygen vacancy concentration of the front channel layer is greater than the oxygen vacancy concentration of the intermediate layer

A resetting device for pedals of a motor vehicle is provided with a spring element (6), which is fixed on a mount (9) at the pedal (1), on the one hand, and, on the other hand, at a corresponding mount (10). At least one spring-loaded friction element (12) is provided with at least one friction surface pair (13, 14). The friction surface pair (13, 14) is arranged between the pedal (1) and the body of the motor vehicle.

The invention provides a concrete member and steel support H-shaped embedded connection joint. The concrete member and steel support H-shaped embedded connection joint is arranged between beams and columns of a house. The concrete member and steel support H-shaped embedded connection joint comprises concrete member parts and connection joint parts, wherein each concrete member part comprises concrete beam inner longitudinal bars, concrete beam inner stirrups, concrete column inner longitudinal bars, concrete column inner stirrups, a first steel plate and a second steel plate; each connection joint part comprises a first support connection joint plate, a second support connection joint plate and steel supports; and both ends of each support steel are respectively and mutually connected with the connection joint parts. The concrete member and steel support H-shaped embedded connection joint is characterized in that the corresponding concrete member part also comprises third steel plates. The third steel plates are located between the first steel plate and the second steel plate; one ends of the third steel plates are connected with the first steel plate; and the other ends of the third steel plates are connected with the second steel plate.

The invention discloses a high-precision ceramic pressure sensor which comprises a ceramic baseplate containing a concave hole and a plurality of electric-conductive through holes as well as a ceramic thin plate combined on the side of the ceramic baseplate where the concave hole is located, a measuring electrode and a first annular electrode winding the measuring electrode are disposed on a concave face of the concave hole, a moving electrode and a second annular electrode winding the moving electrode are disposed on the face of the ceramic thin plate which is opposite to the concave face, leading-out ends of the measuring electrode, the first annular electrode, the moving electrode and the second annular electrode are respectively led out from the other side opposite of the ceramic baseplate which is opposite to the concave hole via the corresponding electric-conductive through holes, the moving electrode and the measuring electrode constitute a measuring capacitor, the moving electrode and the first annular electrode constitute a reference capacitor, and the first annular electrode and the second annular electrode also constitute an isoelectric face through short circuits of the electric-conductive through holes. The high-precision ceramic pressure sensor disclosed by the invention can control an electrode spacing within a very high precision scope without introducing any second material, and has high sensitivity and good sealing effects.