58results about How to "Control resistance" patented technology

A converter circuit and methods for operating the same. The converter circuit includes a supply voltage, a capacitor, an inductor, and four stacked switching elements. Each switching element is adjustable from a low resistance state to a high resistance state by a control signal. The inductor outputs current to a circuit load. The circuit may be operated in a first mode such that the output is adjustable between the supply voltage and half the supply voltage. Alternatively, in a second mode of operation, the output is adjustable from half the supply voltage to a ground voltage.

A welding wire for use in electric arc welding and method of making same, wherein the wire has an effective outer diameter and comprises a length of solid metal formed into a series of distinct segments each having a selected volume and having an indented and non-indented region with the cross sectional area of the solid metal at said non-indented region being greater than the cross sectional area of the solid metal at the indented region.

An ion exchange membrane obtained by using an ionic monomer having at least two or more polymerizable functional groups, in which a hydrophobicity index H obtained by an expression below from a monomer for forming an ion exchange resin and a material fixed to the resin in the ion exchange membrane is 1.6 or greater, and a manufacturing method therefor. Hydrophobicity index H=Σ{(log P of each component)×(molar ratio of each material in resin)}

The invention provides a self-adjusting type intelligent atomizing core which comprises a body and a printing resistor arranged on the upper surface of the body. The aperture of crystalline grains inthe body is increased from top to bottom. Due to the big-end-down aperture of the crystalline grains, cigarette liquid can conveniently permeate through the crystalline grains from bottom to top and can be prevented from flowing downward, the upward moving cigarette liquid in a liquid inlet groove can press against the downward movement of the atomized cigarette liquid and the cigarette liquid pressed by the atomized cigarette liquid to move downward, the volatilizing efficiency of the atomized cigarette liquid is improved, and the atomizing efficiency of the cigarette liquid is improved. Dueto the design, the invention further provides a manufacturing method of the self-adjusting type intelligent atomizing core. The manufacturing method includes the steps of sequential overlapping of a plurality of ceramic layers, calcinating, silk-screening and sintering. The method is simple in process and reliable.

A method for forming a semiconductor integrated device, comprising: providing a semiconductor substrate, the semiconductor substrate has a first region and a second region opposite to the first region, the surface of the semiconductor substrate in the first region is sequentially formed with first A silicon oxide layer, a first polysilicon layer, and a second silicon oxide layer, and an isolation layer is formed on the surface of the semiconductor substrate in the second region; using the same formation process, the second silicon oxide layer and the isolation layer Form the second polysilicon layer on the surface of the layer; remove the second polysilicon layer, the second layer of silicon oxide layer, the first polysilicon layer, and the first layer of silicon oxide layer in the first region to form a sub-gate flash memory; removing part of the second polysilicon layer in the second region to form a polysilicon resistor. The polysilicon layer in the polysilicon resistor is formed in the same formation process as the control gate of the split-gate flash memory, which saves etching and deposition steps and improves process integration.

A photoconductive device includes: a photoconductive layer configured to generate carriers upon irradiation with excitation light, a first electrode arranged on the photoconductive layer, a second electrode arranged on the photoconductive layer with a gap between the first and second electrodes, and a third electrode arranged in a region over which an electric field caused by voltages applied to the first and second electrodes or an electric field caused by irradiation with a terahertz wave extends. A depletion layer of the photoconductive layer is controllable by a voltage applied to the third electrode.

The invention provides a tension damper. A balance bar is rotatably mounted on a balance base. An angle sensor used for detecting the rotation angle of the balance bar is arranged on the balance base.With the rotation axis of the balance base as a boundary, a damper body is arranged at one end of the balance bar and is used for providing advancing resistance for a wire or strip; and a sliding block device is arranged at the other end of the balance bar, and the position of the sliding block device can be adjusted along the balance bar. According to the tension damper, the tension applied to the wire or strip can be accurately adjusted through the structure of the balance bar, and thus, the tension damper can be applied to a wire or strip production line with a high precision requirement;and the resistance of the wire or strip can be controlled to keep the advancing speed of the wire or strip constant while the tension is controlled, the tension borne by the wire or strip is kept constant, and thus, the production quality of high-precision wires or strips is improved.

The invention discloses a method for preparing a tungsten-doped vanadium oxide film, comprising the following steps of: firstly, placing the cleaned substrate into a high vacuum chamber; secondly, introducing high-purity argon gas into a vacuum chamber; respectively carrying out sputter cleaning on the surfaces of a metal vanadium target and a metal tungsten target by turning on a vanadium target sputter power supply and a tungsten target sputter power supply under the condition that the substrate is shielded by using a substrate baffle; introducing high-purity oxygen gas into the vacuum chamber; opening the substrate baffle, closing a tungsten target baffle, turning on the vanadium target sputter power supply and depositing a bottom layer vanadium oxide film; after the depositing the bottom layer vanadium oxide film, closing oxygen gas and the vanadium target baffle and turning off the vanadium target sputter power supply, turning on the tungsten target sputter power supply and opening the tungsten target baffle and depositing an intermediate layer of tungsten film; after depositing the metal tungsten film, turning off the tungsten target sputter power supply and closing the tungsten target baffle, introducing oxygen gas again, turning on the vanadium target sputter power supply and opening the vanadium target baffle and depositing the vanadium oxide film; and finally, carrying out in-situ annealing treatment on a composite film obtained through deposition.

The invention discloses a voltage / current double-loop control device and a chip, relating to the field of integrated circuits. In the voltage / current double-loop control device provided by the embodiment of the invention, a selection unit comprises a selection amplifying subunit and a common mode subunit, wherein the selection amplifying subunit is used for amplifying a signal with a large voltage value in output signals of a comparison amplifying unit and outputting the signal to a voltage controlled resistor as a control signal. Since the signal with a large voltage value in the output signals of the comparison amplifying unit is amplified, the resistance value of the voltage controlled resistor can be controlled more accurately, and the control accuracy of the voltage / current double-loop control device can be improved further.

An integrated circuit programmable resistor or programmable capacitor has a floating gate memory cell connected either in series or in parallel to a fixed resistor or a fixed capacitor. The resistance or the capacitance of the floating gate memory cell can be changed by the amount of charge stored on the floating gate which affects the resistance or the capacitance of the channel from which the floating gate is spaced apart. A particular application of the programmable resistor / capacitor is used in a system whereby the resistance or the capacitance can be change or fine tuned as a result of either drift caused by time or by operating conditions such as temperature. Thus, the temperature of the substrate in which the floating gate memory cell is fabricated can be monitored and the resistance or the capacitance of the floating gate memory cell changed dynamically.

An improved method is disclosed for forming heater elements for an ink jet printhead. The resistance is more closely controlled by doping a central heater region which is formed relatively thinner than the heavily doped heater regions which are used as the gate and contact areas. The thinner central region can doped relatively heavy in order to more accurately adjust the heater resistance. In another embodiment, the thin layer is amorphous silicon rather than the polysilicon to increase the latitude of the energy input.

The invention provides a photoelectric information conversion element, comprising a top electrode, a medium layer and a bottom electrode, wherein the medium layer and at least one of the bottom electrode and the top electrode form a Schottky junction. The element has a wide spectrum effect to light; when light irradiates the element, the characteristics of the Schottky junction are regulated by photogenerated holes in a node region, so that the resistance of the element is changed continuously; moreover, the resistance of the element is regulated polymorphically by controlling the strength and / or wavelength of the irradiating light; in addition, electrons can be injected to the interface of the Schottky junction by applying certain voltage, so that the resistance of the element recovers to the initial state. Therefore, the element has wide spectrum response and sustainable photoconduction and can be applied to many fields such as a multifunctional optical detector, an intelligent photosensor, an optical signal operational unit, an optical information decoding (or encoding) device and a nonvolatile memory.

The invention discloses a bicycle applied to VR riding. The bicycle comprises a vehicle frame, a front wheel and a rear wheel which are arranged on the vehicle frame, pedals which are rotatably connected to the vehicle frame, and a rotation damping device which is used for taking a damping effect on rotation of the pedals, wherein the rotation damping device comprises magnetorheological fluid cavities which are arranged on the vehicle frame, magnetorheological fluid that the magnetorheological fluid cavities are filled with, and a damping rod which runs through the magnetorheological fluid cavities and is coaxially fixed to a rotating shaft of the pedals; blades are fixed to the rod sections, which are located within the magnetorheological fluid cavities, of the damping rod; and electromagnetic coils wind outside the magnetorheological fluid cavities. According to the bicycle, damping force is applied to the rotation of the pedals by virtue of the magnetorheological fluid liquid; and riding resistance can be adjusted in real time by changing a magnetic field environment of the magnetorheological fluid.

Provided is a device for recycling and utilizing resistance energy in the steel wire pay-off process of a pipe type stranding machine. A power generation device comprises an AC generator, a voltage regulator and a rectifier filter. The output end of the AC generator is connected with an adjustable load resistor and the voltage regulator. The voltage regulator is connected with the rectifier filter. The front end of the rotor of the AC generator is connected with a driving pulley. The driving pulley is fixedly connected with a rotor shaft. The driving pulley and a driven pulley on a pay-off wheel mounting shaft are transmitted by a triangular belt. A power storage device is equipped with a storage battery and an inverter. The input end of the storage battery is connected with the output end of the rectifier filter, and the output end of the storage battery is connected with the inverter. The inverter is connected with the voltage regulator and a tension test and control device. The output end of the AC generator is also connected with the voltage regulator. The output end of the voltage regulator is connected with the input end of the tension test and control device. With the device, lost energy can be effectively recycled and conveniently stored and utilized. The device has good energy saving performance.

The invention discloses a brake disc type braking system of a traction type soil tank experimental platform. The brake disc type braking system comprises a rack, a traction wire rolling roller, a brake disc, a braking mechanism and a control module. The traction wire rolling roller is mounted on the rack through a bearing pedestal, and a rotating speed measuring instrument is mounted on a rotary shaft of the traction wire rolling roller. The rotating speed measuring instrument and the control module are in communication through a cable, and a speed measuring ring of the rotating speed measuring instrument and the rotary shaft synchronously rotate. The braking mechanism comprises a linear motor, a pull rod, a pressing rod, a first hydraulic cylinder and a braking module. The braking module comprises a shell, a second hydraulic cylinder, a reset spring, a first brake pad and a second brake pad. The invention further discloses a braking method of the brake disc type braking system of the traction type soil tank experimental platform. The magnitude of braking force can be controlled; on the one hand, stopping of an experimental platform trolley is guaranteed; and on the other hand, stable braking of the platform trolley is guaranteed, and braking impact force is reduced to the minimum to guarantee the safety of a sensor and other detecting equipment.

The invention discloses a lung function recovery training device. The lung function recovery training device comprises a gas guide assembly, a gas blowing mouth and a gas blocking assembly which is embedded in the gas guide assembly in a matched way; the gas guide assembly comprises a gas guide pipe, a clamping sleeve arranged on the side wall of the gas guide pipe and a balloon; a gas outlet is formed on the side wall of one end, far away from the opening end, of the gas guide pipe; a limiting plate which is arranged annularly is arranged at the gas outlet; the clamping sleeve is embedded onthe inner wall of the limiting plate in a matched way; the lower end of the balloon is fixed between the limiting plate and the clamping sleeve; the gas blocking assembly comprises a baffle and a pullrod; the baffle is arranged on the inner wall of the gas guide pipe in a fitting way; the pull rod is arranged on the end part of the baffle; a round through hole is formed in the end face of the baffle; and the inner diameter of the round through hole is more than the inner diameter of the clamping sleeve. The movable baffle is designed and is used for adjusting the overlapped area of a round formed by the round through hole and the inner wall of the clamping sleeve and controlling the size of the gas outlet, so that the gas blowing resistance is controlled, the lung function recovery training device is used for adapting to patients with different recovering degrees and the structural design is flexible.

The invention relates to an air-inlet system (10), and relates to an air-conditioning system (100, 101 ) and an internal combustion engine (200) comprising the air-inlet system. The air-inlet system comprises an air intake port (20), an air output port (30) and a turbine (40) for controlling air mass flow into a combustion chamber (202) of an internal combustion engine. The turbine is provided with a propeller hub (42) which comprises at least one blade (44). The propeller hub is arranged between the air intake port and the air output port for propelling the blade of the turbine. The turbine has an air-flow resistance for determining the air mass flow into the combustion chamber. The effect of the air-inlet system according to the invention is that the use of a turbine enables to use at least some of the pressure drop across the turbine to drive the blade of the turbine for generating rotational energy.

An ion exchange membrane obtained by using an ionic monomer having at least two or more polymerizable functional groups, in which a hydrophobicity index H obtained by an expression below from a monomer for forming an ion exchange resin and a material fixed to the resin in the ion exchange membrane is 1.6 or greater, and a manufacturing method therefor. Hydrophobicity index H=Σ{(log P of each component)×(molar ratio of each material in resin)}.

The invention relates to a novel hydraulic cyclone. The novel hydraulic cyclone comprises a sand sedimentation spit, wherein one end of the sedimentation spit is provided with an adjusting device for adjusting the underflow of the hydraulic cyclone. The hydraulic cyclone has the advantage of accurately adjusting the resistance of the sand sedimentation spit so as to accurately adjust the grading index of the hydraulic cyclone. The hydraulic cyclone is particularly suitable for grading and dewatering fine granular materials, is convenient to operate, and has small index fluctuation and obvious economic benefit.

The invention discloses a breathing training device. The breathing training device comprises a round tube, a ventilation ring, sealing plates, impellers, a metering device and a torsion adjusting device, wherein two ends of the ventilation ring are sealed through the sealing plates; the impellers are coaxially mounted in the ventilation ring; the middle of the round tube is round-cake-shaped, the ventilation ring is mounted at the round cake shape of the round tube and separates the inside space of the round tube into two independent parts, and the ventilation ring is coaxial with the round cake shape of the round tube; two vent holes are oppositely formed in the outer surface of the ventilation ring; the vent holes in the ventilation ring communicate with two ends of the round tube; the metering device is mounted on a shell; one part of the metering device penetrates through the shell and the sealing plate to be fixedly connected with one end of a rotation shaft of the impellers; the torsion adjusting device is mounted on the shell, and one part of the torsion adjusting device penetrates through the shell and the sealing plate to be fixedly connected with the other end of the rotation shaft of the impellers. For the breathing training device, the air amount of the breathing training each time can be checked through the metering device, and the breathing force during breathing training can be adjusted through the torsion adjusting device, so that the training for the lung muscle is realized.

The invention discloses a manufacturing method for avoiding a problem of faulty soldering of a tab and a cover plate, which is characterized in that: the manufacturing method comprises the following steps of: straightening a battery aluminum tab completely injecting an electrolyte; placing the battery aluminum tab into a fixed tray; inversely turning the tray 180 degrees and placing the tray on a lifting frame, wherein at the moment, a port of a battery case faces downward; turning on a descending button, descending the tray to soak the tab into an ultrasonic cleaning liquid with pure water, setting the frequency to 10KHz and working time to 2min, and cleaning the electrolyte and impurities on the tab; and then drying the tab. The manufacturing method has the advantages of avoiding the problem of the faulty soldering of the tab and the cover plate.

The invention provides a tension damper. A balance bar is rotatably mounted on a balance base. An angle sensor used for detecting the rotation angle of the balance bar is arranged on the balance base.With the rotation axis of the balance base as a boundary, a damper body is arranged at one end of the balance bar and is used for providing advancing resistance for a wire or strip; and a sliding block device is arranged at the other end of the balance bar, and the position of the sliding block device can be adjusted along the balance bar. According to the tension damper, the tension applied to the wire or strip can be accurately adjusted through the structure of the balance bar, and thus, the tension damper can be applied to a wire or strip production line with a high precision requirement;and the resistance of the wire or strip can be controlled to keep the advancing speed of the wire or strip constant while the tension is controlled, the tension borne by the wire or strip is kept constant, and thus, the production quality of high-precision wires or strips is improved.

The invention discloses a preparation process for a carbon film tin-sprayed printed circuit board. The process comprises the following steps of performing pretreatment: before resistance welding and carbon film printing, carrying out mechanical polishing brushing and cleaning on a copper plate matrix by using a mechanical polishing, brushing, coarsening and cleaning machine; preparing a printed screen plate: coating a 220-mesh acrylic fiber screen plate with a blocking adhesive with the thickness of 30 [mu]m; performing printing and resistance welding: printing the printed screen plate with printing ink; printing the copper plate matrix with the printed screen plate with the printing ink; and after the copper plate matrix is printed, performing resistance welding on characters; performingsolidifying and baking: adding the copper plate matrix into a seven-temperature-zone internal circulation hot air solidifying machine for performing solidifying; and performing tin spraying: performing the tin spraying on a copper plate substrate, and then performing cooling. The carbon film tin-sprayed printed circuit board prepared with the process is short in production period; high pollution of electroless gold plating is avoided; the difficulty that the copper surface of a common carbon film board is easy to oxidize is overcome; and the overall performance and reliability of the carbon film tin-sprayed printed circuit board are improved.

The invention discloses a physical fitness test device for physical education, and relates to a physical fitness test device. The inner side of a rectangular frame is fixedly provided with a pluralityof screw rods, a sleeve is rotatably arranged in the middle of each screw rod, fastening nuts are screwed to the two ends of each screw rod, and first compression springs are sleeved between the sleeves and the fastening nuts; the four corners of the rectangular frame are provided with through holes and fixedly connected with a slope surface base through mounting screws, and second compression springs are arranged between the rectangular frame and the slope surface base; the slope surface base is fixedly provided with a hand support bracket, a shell is fixed on the hand support bracket, a control main board and a timing module are located in the shell, a display module is arranged on the surface of the shell, grooves are oppositely formed in the two mounting screws, and an infrared emitter and an infrared receiver are fixed in the two grooves respectively; a sealed water storage box is fixed on the hand support bracket, one end of a display tube penetrates into the water surface of the sealed water storage box, and one end of a breathing tube penetrates into the water surface of the sealed water storage box. By means of the physical fitness test device, the time difference betweenevery two steps during running can be recorded, in cooperation with a breathing display device, the physical fitness test device assists a user in knowing the time when the physical fitness begins todecline, and the device is simple, effective and easy to popularize.

The invention discloses a non-contact biking training station. The non-contact biking training station comprises a frame (1) and a resistance device (2) which is arranged on the frame (1), a clamping base used for clamping an axle of a bike is arranged on the frame (1), the resistance device (2) is used for applying resistance to a wheel and comprises two supporting arms (4) which are arranged on the frame (1), and a gap for placement of the wheel of the bike is formed between the two supporting arms (4); magnets (5) are connected with the two supporting arms (4) respectively, and a steel wheel rim of the wheel of the bike is arranged between the magnets (5) on the two supporting arms (4). According to the non-contact biking training station, friction noise does not exist, and the versatility is wide; the size is small after folding, so that the package cost is saved.

The centrifugal machine comprises a centrifugal machine body, a supporting plate, an observation window and a control box, the control box is connected to one side in front of the centrifugal machine body in an embedded mode, a shell cover is movably connected to the top of the centrifugal machine body, the observation window is connected to the middle of the top of the shell cover in an embedded mode, and a feeding port is connected to the top end of the shell cover in an embedded mode. The other side of the centrifugal machine body is fixedly connected with a supporting plate, the middle part in the centrifugal machine body is movably connected with a rotary drum, the middle part in the rotary drum is movably connected with a spiral blade, the spiral blade can stably and continuously push sediments when pushing the sediments, the separation effect is good, and the separation performance of the centrifugal machine body is reflected; the noise reduction and shock absorption layer embodies the safety of the centrifugal machine body, the water injection nozzle enables the solid-liquid separation effect to be more obvious, the separability of the centrifugal machine body is embodied, the liquid level adjusting piece can adjust the resistance encountered by the rotary drum during rotation, the rotating speed of the centrifugal machine body is increased, and the controllability of the centrifugal machine body is embodied.