92results about How to "Extended closing time" patented technology

A voltage-waveform detector produces a voltage-feedback signal and a discharge-time signal by multi-sampling a voltage signal of a transformer. The discharge-time signal represents a discharge time of a secondary-side switching current. A voltage-loop error amplifier amplifies the voltage-feedback signal and generates a control signal. An off-time modulator correspondingly generates a discharge-current signal and a standby signal in response to the control signal and an under-voltage signal. The under-voltage signal indicates a low supply voltage of the controller. An oscillator produces a pulse signal in response to the discharge-current signal. The pulse signal determines the off-time of the switching signal. A PWM circuit generates the switching signal in response to the pulse signal and the standby signal. The standby signal further controls the off-time of the switching signal and maintains a minimum switching frequency. The switching signal is used for regulating the output of the power supply.

A lighting device includes: a power converting unit; a voltage measuring unit for measuring an output voltage from the power converting unit or a value equivalent to the output voltage; a current measuring unit for measuring an output current from the power converting unit or a value equivalent to the output current; and a control unit for controlling the power converting unit. When one of the output voltage and the output current of the power converting unit is changed by a specific magnitude per unit hour, the control unit determines that a change in a load status has occurred and controls the power converting unit by switching constant current control in which a measurement value of the current measuring unit is kept at a specific current designated value to constant voltage control in which a measurement value of the voltage measuring unit is kept at a specific voltage designated value.

A method for sterilizing a medical device comprising a hydrophilic coating using radiation said method comprising the steps of bringing the medical device having such coating in contact with an aqueous liquid for wetting the hydrophilic coating, said liquid comprising a solution of a hydrophilic polymer and sterilizing the device by applying a sufficient amount of radiation provides coated devices showing a significantly increased and prolonged water retention and lower friction coefficient when wet.

The present invention discloses a circuit that generates a variable frequency pulse width modulation (VF PWM) signal. Different from the conventional PWM controller, the frequency and duty cycle of the output PWM signal vary with the error-amplified voltage of the feedback loop simultaneously in this invention. The higher the error-amplified voltage of the feedback loop is, the lower the duty cycle with lower frequency will be. A very low duty cycle PWM signal can be generated stably while its frequency is very low.

The present invention discloses a circuit that generates a variable frequency pulse width modulation (VF PWM) signal. Different from the conventional PWM controller, the frequency and duty cycle of the output PWM signal vary with the error-amplified voltage of the feedback loop simultaneously in this invention. The higher the error-amplified voltage of the feedback loop is, the lower the duty cycle with lower frequency will be. A very low duty cycle PWM signal can be generated stably while its frequency is very low.

A circuit and corresponding method for reducing standby power and improving no-load to full-load regulation for ringing choke converters by maintaining a reduced duty cycle, with longer off time at no-load, while maintaining the output voltage swing closer to the full-load level. This reduced duty cycle prevents the output voltage from swinging high with respect to the full-load level, thereby providing good no-load and full-load output regulation in open feedback loop systems. The circuit and method provides very low no-load switching frequency and duty cycle by increasing the off time of the main switch through use of a turn off transistor driven by a zener diode, thereby maintaining conduction even with a very small control current and prolonging the off time of the main switch. The circuit and method achieves the benefits preferably using only less costly basic discrete converter components instead of more costly integrated circuits.

A method for sterilizing a medical device having a hydrophilic coating using radiation, said method including the steps of bringing the medical device having such coating in contact with an aqueous liquid for wetting the hydrophilic coating, said liquid including a solution of a hydrophilic polymer, and sterilizing the device by applying a sufficient amount of radiation to provide a coated device showing a significantly increased and prolonged water retention and lower friction coefficient when wet.

An opening / closing valve (70) is provided in an oil feed pipe (43). When a liquid refrigerant enters from an oil separator (22) into the oil feed pipe (43), the temperature of the liquid refrigerant depressurized by the opening / closing valve (70) is suddenly lowered. When the lowering amount of the temperature detected by a temperature sensor (73) exceeds a prescribed value, it is judged that theliquid refrigerant enters into the oil feed pipe (43), and the valve (70) is closed.

The invention relates to a continuous film vacuum deposition method and a device thereof. The method comprises the steps: an entrance of a vacuum deposition chamber is provided with at least one level of inlet vacuum pre-pump chamber, and an exit of the vacuum deposition chamber is provided with at least one level of outlet vacuum protecting chamber, so that the vacuum degree in the vacuum deposition chamber can be maintained; all levels of inlet vacuum pre-pump chambers, the vacuum deposition chamber and all levels of outlet vacuum protecting chambers are communicated with each other by slits and sealed by valves arranged at the slits; substrates enter all the chambers through the slits; the valves open when the substrates pass through, and close after the substrates pass through; when the substrates enter the inlet vacuum pre-pump chambers or leave the outlet vacuum protecting chamber, at least one inlet valve and outlet valve are close to keep the vacuum degree in the vacuum deposition chamber unchangeable. The transfer speed of the substrates is regulated to lead the distance between two adjacent substrates to be reduced before reaching a deposition device and the distance between two adjacent substrates to be increased when leaving the vacuum deposition chamber, thereby realizing the continuous film deposition and greatly improving the utilization rate of raw materials.

The present invention provides a multimeric form of a Tie 2 binding peptide monomer, wherein the multimeric form has Tie 2 agonist activity. The multimeric form, preferably a tetramer, stimulates angiogenesis and promotes wound healing. The present invention also features pharmaceutical compositions comprising the multimeric Tie 2 agonists, including those suitable for topical or systemic administration. Methods of using the multimeric Tie 2 agonists of the invention for stimulating angiogenesis and for promoting healing of wounds, such as diabetic ulcers or skin grafts, are also provided.

The present invention discloses an MEMS universal inertia switch capable of identifying a load orientation interval. The switch comprises an insulation substrate, an axial electrode supporting base, a radial electrode supporting base, a spring supporting base, an axial electrode, an annular inertia mass block electrode, a spacing stop post, a radial electrode, a snake-shaped support spring, a radial electrode connecting strip, a radial electrode connecting strip and at least one mass block electrode connecting strip. The MEMS universal inertia switch capable of identifying the load orientation interval has good response for the acceleration load at any one direction from the upper portion of the substrate to play a switch on / off effect, and can effectively identify the space orientation of the acceleration load which the switch has so as to solve the problem that a current MEMS universal inertia switch cannot identify the load space orientation, and the axial threshold of the closure of the switch is larger than a radial threshold thereof to realize axial deterring and radial sensitivity of the switch.

A pulse voltage is applied on a process gas to generate discharge plasma. The pulse voltage has a duty ratio controlled in a range of 0.001 percent or more and 8.0 percent or less. Preferably, the discharge plasma has an electron density of 1×1010 cm−3 or larger and an electron temperature of 1.5 eV or lower at a supplied power of 1.0 W / cm2 or more per a unit area of a discharge electrode.

The invention discloses a control method, a control system and an air conditioner. The control method is used for the air conditioner, and comprises the following steps of determining a current working mode of the air conditioner when a shutdown signal is received, and controlling an outdoor unit of the air conditioner to be closed; setting an indoor fan and an air guide device of the air conditioner to run according to a preset working state according to the current working mode to make an temperature of indoor heat exchanger of the air conditioner close to indoor environmental temperature; when a preset condition is met, controlling the indoor fan and the air guide device to be sequentially closed. According to the technical scheme, noise produced after an indoor unit of the air conditioner is shut down can be effectively reduced, dependence on acquisition and a feedback link of a temperature sensor and the probability of influence of a failure or occurrence of problems in the feedback link of the temperature sensor on a noise reduction effect can further be reduced, and user experiences are further improved.

A UAV (unmanned aerial vehicle) operator state monitoring system based on multi-sensor fusion comprises multiple kinds of sensors used for monitoring states of a UAV, a computer used for processing data collected by the various sensors as well as a displayer for displaying and controlling the states of the UAV; a UAV operator knows the state of the UAV through the displayer and controls the UAV, the multiple kinds of sensors collects various state messages of the UAV operator in real time, the state monitoring for the UAV operator is realized, the sensors send the collected state messages to the computer for data processing, and finally, a computer outputs a state evaluation result of the operator. The system can evaluate the working state of the operator in real time, and the evaluation result is used for calculating the decision level of the UAV operator; the system effectively prevents the man-out-of-the-loop incidents, so that flight accidents are avoided, and the UAV completes missions effectively and safely.

A system and method of operating a vehicle air conditioning system having an engine driven, fixed capacity refrigerant compressor and a compressor clutch is disclosed. The method may comprises setting a preliminary evaporator air temperature target; charging a cold storage apparatus in the vehicle air conditioning system; determining if the cold storage apparatus has reached a predetermined threshold; if the cold storage apparatus has reached a predetermined threshold, determining a new evaporator air temperature target by: determining a maximum allowable dewpoint evaporator air temperature for maintaining a passenger compartment humidity below a predetermined value; determining a maximum allowable mode evaporator air temperature based on a mode to which the vehicle air conditioning system is set; and setting the evaporator air temperature target to the lower of the dewpoint evaporator air temperature and the mode evaporator air temperature. The compressor clutch is controlled to achieve the evaporator air temperature target.

A circuit and corresponding method for reducing standby power and improving no-load to full-load regulation for ringing choke converters by maintaining a reduced duty cycle, with longer off time at no-load, while maintaining the output voltage swing closer to the full-load level. This reduced duty cycle prevents the output voltage from swinging high with respect to the full-load level, thereby providing good no-load and full-load output regulation in open feedback loop systems. The circuit and method provides very low no-load switching frequency and duty cycle by increasing the off time of the main switch through use of a turn off transistor driven by a zener diode, thereby maintaining conduction even with a very small control current and prolonging the off time of the main switch. The circuit and method achieves the benefits preferably using only less costly basic discrete converter components instead of more costly integrated circuits.

A method of operating the evaporative purge system for an engine of a vehicle propulsion system is provided. In one example, the method provides for charging and purging two fuel vapor canisters independently or at the same time. The method may provide for improved fuel vapor processing under some conditions.

The invention discloses a stability control construction method of a water-enriched soft rock tunnel passing through a fault crushed zone. A plurality of tunnel segments in a construction tunnel are constructed respectively from back to front. During construction of any one of the tunnel segments, the method comprises the following steps: 1, performing pipe shed forepoling; 2, performing tunnel excavation and preliminary bracing: performing upper peripheral side cavity excavation and preliminary bracing, performing a reserved core soil area cavity excavation and preliminary bracing, excavatingthe cavity which is excavated firstly and performing preliminary bracing as well as excavating the cavity which is excavated secondly and performing preliminary bracing; and 3, performing tunnel secondary lining construction. The method is reasonable in design, simple and convenient in construction and good in use effect; before excavation, the upper cavity is subjected to forepoling by a self-drilling pipe shed and is excavated by a two-step method, so that the excavation efficiency is effectively improved; and meanwhile, an integral supporting system with a stable structure, which is formedby connecting a surrounding rock integral reinforced structure outside the cavity and a tunnel preliminary bracing structure and tunnel secondary lining, can effectively improve the stability of thetunnel structure and guarantee the later safety of the tunnel structure.

In a direct injection gasoline engine, at acceleration operation, an amount of internal EGR is increased by advancing exhaust valve closing timing, and also fuel injection pressure is increased. In this case, range of increase in fuel injection pressure is determined on the basis of the exhaust valve closing timing at present.

The invention provides an elevator door closing control system and control method, and relates to the technical field of elevator control. The elevator door closing control system comprises multiple data collection devices used for collecting first data, within the first preset range, in an elevator door and collecting second data, within the second preset range, outside the elevator door, a controller and a portal crane control device; the controller is used for receiving first data and second data and judges whether a person exists in the first preset range and the second preset range or not, and moves in the direction of the elevator door with the speed larger than the preset speed; the portal crane control device is configured to control the elevator door to stop from closing and enable the elevator door to enter in the complete opening state again when it is judged that the person exists in the first preset range and the second preset range, and moves in the direction of the elevator door with the speed larger than the preset speed. According to the elevator door closing control system, the phenomenon that the person needs to enter in and go out of the elevator, and the elevator door is directly closed is avoided, great convenience is brought to the person entering in and out of the elevator door, and the phenomenon that the elevator is closed in advance, and the person entering in and out of the elevator is accidentally injured is avoided.

An LED driver is provided having a gate drive integrated circuit with an adaptive operating mode which operates between a first operating mode and a second operating mode. The gate drive integrated circuit is designed to primarily operate in the first operating mode which includes a predetermined minimum on-time and a predetermined maximum off-time for enabling and disabling gate drive signals to a switch, respectively. The second operating mode begins at the minimum on-time and the maximum off-time. The LED driver further includes a controller configured to monitor an on-time and an off-time of the gate drive signals. The controller is further configured responsive to the second operating mode to fix the on-time equal to the predetermined minimum on-time and to continually adjust the off-time greater than or equal to the maximum off-time.

The invention discloses a method for constructing a water-rich weak surrounding rock tunnel crossing a fault broken belt. The method comprises the following steps that firstly, construction is carriedout on a plurality of tunnel sections in a construction tunnel from front to rear, and when any tunnel section is constructed, the construction method comprises the following steps that 1, advanced support is carried out on a pipe shed; 2, tunnel excavation and initial support are carried out, wherein upper peripheral side hole excavation and initial support are carried out, reserved core soil area hole excavation and initial support are carried out, first hole excavation and initial support are carried out firstly and thereafter second hole excavation and initial support is carried out; and3, tunnel secondary lining construction is carried out. The method has the beneficial effects that the design is reasonable, construction is easy and convenient, and the use effect is good; the self-drilling pipe shed is adopted to carry out advanced support on the upper hole body before excavation, and two-step method excavation is adopted, so that the construction efficiency can be effectively improved; meanwhile, the whole reinforcing structure of the hole peripheral rock, the tunnel primary support structure in holes and the tunnel secondary lining are connected to form an integral supportsystem with a stable structure, the stability of the tunnel structure can be effectively improved, and the safety of the later tunnel structure is ensured.

A pulse voltage is applied on a process gas to generate discharge plasma. The pulse voltage has a duty ratio controlled in a range of 0.001 percent or more and 8.0 percent or less. Preferably, the discharge plasma has an electron density of 1×1010 cm−3 or larger and an electron temperature of 1.5 eV or lower at a supplied power of 1.0 W / cm2 or more per a unit area of a discharge electrode.

An active air flap and electric thermostat integration control method for a vehicle may include a first control step of controlling opening and closing of an active air flap (AAF) depending on whether the vehicle starts-up, a second control step of controlling opening and closing of an electric thermostat (ETS) and the opening and closing of the AAF according to an engine temperature, a third control step of controlling the opening and closing of the ETS and the opening and closing of the AAF according to an engine load, a fourth control step of controlling the opening and closing of the ETS and the opening and closing of the AAF depending on whether a brake is operated, and a fifth control step, by the ECU, of controlling the opening and closing of the ETS and the opening and closing of the AAF according to a coolant temperature.

The invention relates to a device for increasing the turning rate of an operational amplifier, an auxiliary output device and an auxiliary control device are added after the output stage of the operational amplifier, the current of the output stage is mirrored by the auxiliary control device and is compared with the reference current, thereby generating an auxiliary push-pull control signal to control the auxiliary output device; when the voltage level of an output signal is not equal to the voltage level of an input signal essentially, the auxiliary control device is controlled to start the auxiliary output device to provide an auxiliary output current to an output end, when the voltage level of the output signal is equal to the voltage level of the input signal essentially, the auxiliary output device is closed.

A power conversion apparatus includes a converter having an input power source Vin, a reactor L1, a switching element Q1, and a rectifying element D1, a smoothing capacitor C1 connected to an output terminal of the converter, and a controller 10b to turn on / off the switching element and thereby control power to be outputted from the converter. The controller has a pulse generator 15 to generate a pulse signal according to an input voltage to the converter and an output voltage from the converter, the pulse signal being used to turn on / off the switching element. The controller also has an adjuster 18 to mask an ON time of the pulse signal for a predetermined time and thereby provide the pulse signal with an adjusted ON time, the adjusted ON time determining a duty ratio at which the switching element is turned on / off.

A control system of a compression-ignition engine which performs SPCCI combustion in which mixture gas is ignited with a spark plug to be partially combusted by SI combustion and the rest of mixture gas self-ignites to be combusted by CI combustion, is provided. When the engine is operated at least in a given first operating range, a controller of the device controls a variable intake mechanism so that an A / F lean environment where an air-fuel ratio in a cylinder becomes higher than a stoichiometric air-fuel ratio is formed, while causing the spark plug to perform spark ignition at a given timing so that the mixture gas combusts by SPCCI combustion, and controls so that, under the same engine load condition, an intake valve close timing is more retarded as the engine speed decreases, within a range where an amount of air inside the cylinder decreases by retarding the close timing.

The invention concerns a method for operating an internal combustion engine (10), said engine (10) comprising a plurality of cylinders (12) each of which having at least one valve of a first type, an inlet valve (5), and at least one valve of a second type, an exhaust valve (7), arranged in an end part of the cylinder (12), each of said cylinders (12) further having a piston (2) movably arranged therein, said piston (2) being adapted to reciprocate between an first end position (TDC) and a second end position (BDC), wherein the first end position (TDC) is located closer to the valves (5, 7) than the lower end position (BDC), said engine (10) being adapted to allow deactivation of at least one cylinder (12) by reducing its supply of fuel, said engine (10) further being adapted to allow varying opening times of the inlet valves (5) and / or the exhaust valves (7).; The invention is characterized in that the method comprises the step of extending the total opening time of at least one valve type (5, 7) of a deactivated cylinder (12) compared to the opening time of the same valve type (5, 7) when the cylinder (12) is active, said extension of the total opening time being performed such that at least one valve (5, 7) of said type is open at least partly both during a first engine stroke, wherein the piston (2) moves in a direction towards its second end position (BDC), as well as during a second consecutive engine stroke, wherein the piston (2) moves in a direction towards its first end position (TDC).

The invention belongs to the technical field of urban underground engineering and particularly relates to a prefabricated supporting pipe piece inverted 'T'-shaped excavation method and a temporary supporting structure adopted by an urban shallow buried large-section tunnel. The temporary supporting structure comprises prefabricated temporary vertical supporting pipe pieces and temporary transverse supporting pipe pieces, wherein the middle partition wall of an upper left step is formed by splicing and erecting the temporary vertical supporting pipe pieces; an inverted arch of the upper left step is formed by splicing and erecting the temporary transverse supporting pipe pieces; an inverted arch of an upper right step is formed by splicing and erecting the temporary transverse supporting pipe pieces; and each temporary vertical supporting pipe piece is provided with a grouting hole. According to the prefabricated supporting pipe piece inverted 'T'-shaped excavation method and the temporary supporting structure adopted by the urban shallow buried large-section tunnel, the temporary supporting structure does not drop to the bottom by adopting temporary vertical supports, and the temporary vertical supports are closed with temporary transverse supports to form an innovative inverted 'T'-shaped excavation method; and an upper step is divided into the upper left step and the upper right step for two-step excavation, and an area of the one-time remolding to a tunnel face soil body is reduced. The construction method provided by the invention has the advantages of simple step, strong operability as well as remarkable economic benefit and social benefit and saves the land.