160results about How to "Wide range of control" patented technology

The invention discloses an electronic sensor type electric pressure cooker, which comprises a pot cover, a power supply board, a heating plate and an automatic pressure control mechanism. The sensor on the side, and the control chip connected between the sensor and the heating plate; the sensor sends an induction signal to the control chip, and the control chip sends an instruction to turn on or cut off the power supply of the heating plate. The invention uses electronic sensing to control the internal pressure of the inner pot, and the whole control process is non-contact controlled, with simple structure, reliable performance, wide control range, high precision, high sensitivity, and the safety performance is much better than that of the electric pressure cooker using the traditional control mechanism. .

A variable configuration articulated tracked vehicle comprises a chassis, a pair of right and left drive pulleys, a right and left planetary wheel, a right and left track, a right and left arm mechanism, and a right and left drive motor. The drive pulleys are rotatably attached to the chassis and each pair of drive pulleys is in the same plane. The planetary wheels are movable relative to the chassis such that each planetary wheel is in the same plane as its respective drive pulleys. The tracks extend around the pair of drive pulleys and the planetary wheel on the respective sides. The arm mechanisms connect the respective planetary wheel to the chassis. Each arm mechanism is rotatably attached to the chassis with a cam. The cam defines a motion path of one end of the arm whereby the motion of the planetary wheel provides a path for the planetary wheel such that the track path defined by the respective drive pulleys and the planetary wheel is a constant track length. The motors are each operably connected to the respective pair of drive pulleys for driving the track.

The invention relates to a single crystal silicon texture-making additive and a single crystal silicon texture-making technology. The single crystal silicon texture-making additive consists of a wetting agent and a defoaming agent. The additive is characterized in that the wetting agent is a nonionic surfactant. The single crystal silicon texture-making technology comprises the following steps: heating deionized water to 70-80 DEG C, adding sodium hydroxide or potassium hydroxide to obtain a single crystal silicon texture-making corrosive liquid, wherein the mass percentage of sodium hydroxide or potassium hydroxide is 1%-2%; adding the single crystal silicon texture-making additive in the single crystal silicon texture-making corrosive liquid to obtain a mixed solution, wherein the volume percentage of the additive is 0.3%-2%; and placing a precleaned raw silicon chip in the mixed solution for 600-1200s for texture-making. By adopting the additive and technology in the invention, the texture-making quality can be greatly increased, the cost is greatly reduced, the technological operation can be easier and the automatic solution preparation can be realized.

While a vehicle incorporating an active vibration noise control apparatus is decelerating, hysteresis is given if an operating point moves from an operating point on a sampling period characteristic curve to an operating point on another sampling period characteristic curve. Even if a base period detected depending on noise contains fluctuations, a smooth noise control process is performed. Since a division number produced when the base period is divided by a sampling period is a real number, the freedom of design is widened. Less strict limits are posed on the processing capability of a CPU of the active vibration noise control apparatus to provide a wider control range.

Solid compositions containing low water solubility 3-isothiazolone compounds and carbon-based adsorbents that do not rapidly release the 3-isothiazolone when added to a locus to be protected are disclosed. In particular, methods of controlling or inhibiting the growth of marine organisms using the controlled release solid compositions in paints and coatings for marine structures is disclosed.

A nitric oxide generator generates nitric oxide from a mixture of nitrogen and oxygen such as air treated by a pulsating electrical discharge. The desired concentration of nitric oxide is obtained by controlling at least one of a frequency of the pulsating electrical discharge and duration of each electrical discharge pulse.

While a vehicle incorporating an active vibration noise control apparatus is decelerating, hysteresis is given if an operating point moves from an operating point on a sampling period characteristic curve to an operating point on another sampling period characteristic curve. Even if a base period detected depending on noise contains fluctuations, a smooth noise control process is performed. Since a division number produced when the base period is divided by a sampling period is a real number, the freedom of design is widened. Less strict limits are posed on the processing capability of a CPU of the active vibration noise control apparatus to provide a wider control range.

The invention belongs to the field of monocrystalline silicon solar battery production and discloses an alkaline corrosion solution and a method for preparing monocrystalline silicon texture. The solution is a mixed liquor of an alkaline solution, isopropanol and Na2SiO3, and is structurally characterized in containing 0.002 to 0.01 weight percent of Pb(NO3)2 or Pb. The weigh percentage of the alkaline solution is 1 to 3.5 percent, the weight percentage of the isopropanol is 5 to 7 percent, and the weight percentage of Na2SiO3 is 0.2 to 2 percent. The method is to soak a monocrystalline silicon piece in the alkaline solution to perform a corrosion reaction for 20 to 30 minutes under a condition that the alkaline corrosion solution is at a temperature of between 75 and 80 DEG C. The alkaline corrosion solution and the method have the advantages of reducing surface reflectivity of the monocrystalline silicon piece, preparing a fine texturing 'pyramid', along with low cost, simple operation and stable and effective preparation of the monocrystalline silicon texture.

A variable configuration articulated tracked vehicle comprises a chassis, a pair of right and left drive pulleys, a right and left planetary wheel, a right and left track, a right and left arm mechanism, and a right and left drive motor. The drive pulleys are rotatably attached to the chassis and each pair of drive pulleys is in the same plane. The planetary wheels are movable relative to the chassis such that each planetary wheel is in the same plane as its respective drive pulleys. The tracks extend around the pair of drive pulleys and the planetary wheel on the respective sides. The arm mechanisms connect the respective planetary wheel to the chassis. Each arm mechanism is rotatably attached to the chassis with a cam. The cam defines a motion path of one end of the arm whereby the motion of the planetary wheel provides a path for the planetary wheel such that the track path defined by the respective drive pulleys and the planetary wheel is a constant track length. The motors are each operably connected to the respective pair of drive pulleys for driving the track.

A translinear variable-gain amplifier. The translinear variable gain amplifier receives a differential input voltage and produces a differential output current having a selected gain. The amplifier comprises a buffer amplifier that receives the differential input voltage and produces a differential input current. The amplifier further comprises a translinear gain cell coupled to receive the differential input current and produce the differential output current. The gain cell includes a first adjustable bias source that operates to set a linear input range of the gain cell, and a second adjustable bias source that operates to set a gain value of the gain cell.

The invention discloses a method for smelting low-aluminum high-vanadium iron. The method comprises the following steps of: 1, smelting by adopting an outside furnace process, mixing vanadium pentoxide, aluminum powder, scrap steel, vanadium iron slag or lime, igniting and reacting to generate high-vanadium iron and furnace slag; and 2, uniformly mixing vanadium pentoxide and lime at a reducing stage by adopting an electric furnace process, putting the mixture into an electric arc furnace, adding scrap steel, adding industrial silicon and ferro-silico aluminum depleted furnace slag after the material is in a molten state, deslagging when the vanadium content of the furnace slag is below 0.5 percent, extracting an alloy sample and analyzing vanadium and silicon for monitoring before deslagging, putting vanadium pentoxide and lime into the furnace at a refining stage, electrifying to refine and pouring with a ladle after qualification is determined. The method has the advantages that aluminothermic process smelting is integrated with electro-silicothermic process smelting, chemical reaction heat of vanadium pentoxide and aluminum is fully utilized, furnace slag with high vanadium content is depleted, reduced and refined in a three-phase electric arc furnace to obtain high-vanadium low-aluminum qualified high-vanadium iron, the vanadium content of discharged furnace slag is lower than 0.5 percent, and the smelting yield is over 95 percent.

An interleaved VCO is configured using a ring oscillator with voltage controlled feedforward inverting stages coupled around the inverting stages making up the basic ring oscillator to enable the frequency of the ring oscillator to be voltage controlled. The feedforward inverting stages comprise a complementary inverter stage and a voltage controlled transfer gate. Complementary control voltages are coupled to the gates of the complementary transfer gate FET devices. Likewise, the complementary control voltages are coupled to the corresponding body of the FET devices in the transfer gate and in the inverting stage. The complementary control voltages may also be connected to the body of the complementary FET devices in the inverting stages making up the basic ring oscillator. This allows the frequency range of the VCO to be extended without having to switch the feedforward paths into an out of the circuit.

A discharge displacement control system (A) of a variable displacement compressor has target pressure setting means (402A), discharge pressure detection means (500), and electric current regulation means (404, 406). The target pressure setting means (402A) sets a target of either the pressure in a suction chamber or the pressure in a crank chamber based on a target air temperature at the evaporator exit detected by means (510) for detecting the air temperature at the evaporator exit and on a target air temperature at the evaporator exit set by means (512) for setting a target air temperature at the evaporator exit. The discharge pressure detection means (500) detects the pressure of refrigerant in a high-pressure region. The electric current regulation means (404, 406) regulate, based on both the pressure of the refrigerant in the high-pressure region detected by the discharge pressure detection means (500) and the target pressure set by the target pressure setting means (402A), electric current supplied to a solenoid (316) of a displacement control valve.

A process for electrodeposition of silicon belongs to the electroanalysis and electrophoresis technology field and used forone-step electrodeposition of silicon from SiO2 by using molten salt as medium and adoping direct current. Said process is characterized as follows: using a 3-constituent element composed of NaCl, KCl and NaF as medium, wherein the mol ratio thereof is 1:1:0.5-1:1:4.5, and adding powdery SiO2 which mass is 10% of the fused-salt medium mass therein; after pre-electrolysis impurities removing, electrodepositing pure silicon with electrodeposition temperature of 800 -950 DEG C, electrodeposit time of 0.5 -3 hours and ampere density of 500-1000 A / m2.The present invention is characterized as follows: 1, the constituent elements forming molten salt are usual and cheap pharma-ceutical products which are easy to obtain, then the cost is low and the consumption is small; 2, the manufacturing technique is simple and the process is easy to control. Said process in accordance with the present invention possesses excellent applications foreground in semi-conductor devices fabricating.

The present invention discloses an active clamp forward converter that reduces the charging voltage of clamp capacitors as well as the voltage applied to switching elements, making it possible to reduce the on loss of the switching elements while also enabling the size of the capacitance elements to be reduced. The active clamp forward converter comprises first and second FETs which respectively connects first and second ends of a primary coil of the transformer to positive and negative terminals of a direct current power supply, and third and fourth FETs which respectively connects the first and second ends to the negative and positive terminals of a direct current power supply via capacitors, wherein the pair of first and second FETs and the pair of third and fourth FETs are alternately switched on and off sandwiched about a period when both are off.