60results about How to "Best working point" patented technology

The invention discloses a generating set optimization control method for correcting sliding pressure operation curve by adopting steam consumption rate, which comprises the detailed steps of: confirming the throttling coefficients and minimum pressure of a steam turbine under a designed working condition according to the load command of the generating set and confirming the main steam pressure set value; confirming the parameters of dynamic compensation section according to the main steam pressure response characteristics; respectively calculating the steam consumption rate of the generating set under the designed working condition and the actual working condition, working out the steam consumption rate correction coefficients, and implementing online correction on the load command of the generating set; using the corrected load command to divide the throttling coefficients of the steam turbine, then implementing calculation on the dynamic compensation procedure and minimum pressure limitation, and finally obtaining the best main steam pressure set value of the generating set under the current operation condition. The best main steam pressure set value is applied in a cooperation control system of a unit set so as to realize the best cooperation relation between the inlet steam pressure and inlet steam flow of the generating set, thus reducing the throttling loss of the steam turbine and guaranteeing the best thermoeconomic performance of the generating set.

A petrochemical equipment refinement maintenance system is disclosed in the invention, which is mainly composed of: an equipment information inquiry element, a learning resource element, a general computing element and an equipment failure early warming element. The learning resource element and general computing element read the content from a database via a disk storage file element and displays the learning resource and the computed result; the equipment failure early warming element is used for predicting the failure according to the failure period prewarning and the state monitor prewarning so as to provide equipment failure prewarning and failure shooting information; the equipment information inquiry element performs the equipment inquiry according to a map inquiry element or a position number or a model inquiry element and displays various information and equipment operation device in the equipment information main element. Compared with the existing state monitoring technology, the method of the invention can completely pre-warn the equipment failure, improve technical level of various operators, and increase learning approaches of the knowledge base resources.

The invention relates to an adjustable integrated high-voltage grid electrode pulse modulator. An improved design is conducted on a filament high potential power supply circuit, a positive biased high potential power supply circuit, a negative biased high potential power supply circuit and a grid electrode pulse modulator circuit, and the high dense integration of the three high potential power supply circuits and the grid electrode pulse modulator circuit is achieved; a feedback circuit of a high potential power supply is improved, a magnetism feedback high voltage isolation sampling technology is adopted, and respectively independent adjustment to the high potential power supply output voltage values is achieved at the low voltage side; a high potential integrated failure detecting circuit is added, and the high potential power supply multi-circuit failures are integrated into one circuit signal; a pulse driving circuit is improved, and a dual-level denoising circuit is added; a grid electrode floating plate modulating circuit is improved, and an fire-making resistance protection circuit protection modulator and a traveling wave tube are added; a high-voltage transformer structure used for the modulator is improved, the size is reduced, and high-voltage isolation is achieved.

The invention provides a percutaneous wireless charging device with a frequency modulation and amplitude modulation function applied to an implantation type medical instrument. A flat coil with an internally implanted coaxial magnetic core is utilized in vitro, and a hollow coil is utilized in vivo, so that the charging of the implantation type medical instrument from the vitro to the vivo is realized, the control on the optimal working point of a system is realized by modulating emission frequency and amplitude in a closed-loop control manner, the influence of too high temperature of an vivo implantation type medical instrument on the human body caused by low charging efficiency is prevented, and meanwhile the vitro charger can ensure that the heat does not exceed a danger threshold of the human body through a circuit design.

The invention relates to a low-power rapid-boost FLASH charge pump control circuit. The low-power rapid-boost FLASH charge pump control circuit comprises a programming erase control circuit, a voltage regulating circuit, a voltage reducing circuit, a clock generating circuit, a four phase clock circuit, a charge pump and a voltage stabilizing circuit. The voltage reducing circuit is divided into two paths, one path is used for quick start and works when the output voltage of the charge pump is low, the other path is used for the voltage trimming of the charge pump and works when the output voltage of the charge pump approaches a target value, and the voltage reducing circuit reduces the voltage through a reverser biased diode and a forward biased diode in order to reduce power consumption; the clock generating circuit is used for generating a clock required by the work of the charge pump, the frequency of the clock is adjustable, and in the early start stage, the clock runs in a fastest frequency within an adjustable range, and the voltage of the charge pump fast rises; and when the voltage of the charge pump approaches the target value, the clock frequency is trimmed according to the feedback voltage of the charge pump in order o maintain the voltage of the charge pump in a reasonable range. The control circuit reduces the power consumption of a Flash memory and increases the programming erasing speed of the Flash memory.

The invention relates to a power supply unit, in particular a high power high voltage direct current static electric power supply unit which can serve as the power source for dust collection, spraying and X-ray static electricity. The invention provides an intelligent control power supply unit possessing the advantages of small volume, high frequency, large power, high efficiency and reliability. By integrating inversion driver, inverter and booster transformer, the unit realizes the automatic control by microprocessor for stable high voltage direct current power supply, enabling the power source to keep operating on the optimum working point.

The invention discloses a min-sized shield machine earth pressure balance control system and a control method thereof. The earth pressure balance control system comprises an earth pressure sensor arranged in a mini-sized shield machine sealing cabin and used for monitoring the earth pressure in the sealing cabin. The earth pressure sensor is electrically connected, through an AD conversion circuit, with a controller used for comparing the preset earth pressure data and real-time earth pressure data of a mini-sized shield machine and sending regulation control signals. The controller is electrically connected with a motor used for regulating the earth pressure balance of the mini-sized shield machine. The mini-sized shield machine can regulate the pressure in the shield machine sealing cabin quickly and stably, can find the best working point of a motor on the condition that external parameter perturbation such as different soil environments and mini-sized shield machine working states exist, so that a stable excavation face is maintained, the excavation face is prevented from collapsing, and the deformation of the excavation face is effectively controlled.

The invention discloses a portable true random code generating device which comprises a light-emitting module, an image sensor, scattering materials, a reflection piece, a control module, a USB bridging module, a USB interface, a power conversion module and a PCB. The light-emitting module, the image sensor, the FPGA control module, the USB bridging module, the USB interface and the power conversion module are all fixed on the PCB. The light-emitting module is arranged on the periphery of the image sensor, the scattering materials cover the image sensor and the light-emitting module, and the reflection piece is arranged on the scattering materials. The invention further discloses a portable true random code generating method. The portable true random code generating device is simple in structure, easy to implement, high in randomness and generation rate and low in cost, it is estimated that a real object only has the size of a USB flash disk, carrying is convenient, a USB is used for transmitting true random codes, plug and play is achieved, and using is very convenient. The process of generating the random codes does not relay on any external aids, and high safety is achieved.

The invention relates to a controller which is applied to a resonance-typed DC / DC converter and used for controlling the shifting switch of the resonance-typed DC / DC converter. The controller comprises a pulse width modulation control unit, a high-frequency and fixed-frequency signal generation unit and a logic synthesis unit; the pulse width modulation control unit detects the output voltage of the resonance-typed DC / DC converter so as to generate a pulse width modulation signal; the high-frequency and fixed-frequency signal generation unit generates a high-frequency and fixed-frequency signal; the logic synthesis unit synthesizes the pulse width modulation signal and the high-frequency and fixed-frequency signal so as to generate a driving signal used for driving all shifting switches; the pulse width modulation control unit also detects the resonance current of the resonance-typed DC / DC converter simultaneously, so as to generate a pulse width modulation signal. The controller combines a first high-frequency and fixed-frequency signal and a second high-frequency and fixed-frequency signal of the fixed frequency with the pulse width modulation signal of the fixed width so as to control all shifting switches, thus ensuring that the resonance-typed DC / DC converter is at the best working point under all load conditions, simplifying the controller structure, reducing the loss of the shifting switch and improving the shifting frequency of the shifting switch.

The invention relates to a spiral-flow type jet pump. The jet pump comprises a water inlet pipe, a spiral flow generator, a nozzle, a throat pipe, a water suction pipe, a diffusion pipe and a water outlet pipe. The jet pump is sequentially provided with the water inlet pipe, the spiral flow generator, the nozzle, the water suction pipe, the throat pipe, the diffusion pipe and the water outlet pipe from left to right. An adjustable type spiral flow generating device is arranged in front of the nozzle of the jet pump, and the incoming flow of the water inlet pipe is divided into a plurality of strands and enters the position close to the nozzle in the symmetrically-tangent direction so as to form a vortex, the flow of sucked liquid is accordingly increased, and the efficiency of the jet pump is improved. The spiral-flow type jet pump is simple in structure, easy to mount and low in cost. According to different working conditions of the jet pump, different spiral flow intensities can be adjusted, so that an optimal operating point is obtained.

The invention discloses an adjusting proportioner with convenient operation, small labor intensity and excellent using effect. The adjusting proportioner comprises a runner pipe, wherein the outside of the runner pipe is provided with an outer thimble; a cavum is arranged between the runner pipe and the outer thimble; a foam concentrate pipe is arranged on the outer thimble; the foam concentrate pipe is communicated with the cavum; one end of the runner pipe and the outer thimble is provided with a closure plate closing a ring cavity formed by the end parts of the runner pipe and the outer thimble; the other end of the runner pipe and the outer thimble is provided with a pore plate provided with a plurality of holes communicated with the ring cavity formed by the runner pipe and the outer thimble; an adjusting ring is movably connected with one side of the pore plate; and the adjusting ring is provided with holes the amount of which is corresponding to the holes in the pore plate. The adjusting proportioner with convenient operation, small labor intensity and excellent using effect is applicable to proportioning for water and foam in a fire control foam extinguishing system.

The invention discloses a hydrogen fluoride-containing mixed gas absorption experimental device. The hydrogen fluoride-containing mixed gas absorption experimental device comprises an air source, a hydrogen fluoride gas source, a mixer and a gas absorption system, wherein the air source and the hydrogen fluoride gas source are connected to the mixer through pipelines, the mixer is connected with the gas absorption system through a pipeline and used for proportionally mixing air coming from the air source and hydrogen fluoride gas coming from the hydrogen fluoride gas source, the mixed gas is absorbed by a calcium sulfate solution or a sodium hydroxide solution inside the gas absorption system by spraying after entering the gas absorption system, an induced draft fan connected with an external environment is used for emptying the gas absorption system, and the gas absorption system is a primary absorption tower and / or a secondary absorption tower connected with the primary absorption tower in series. The hydrogen fluoride-containing mixed gas absorption experimental device disclosed by the invention can be used for absorbing the hydrogen fluoride mixed gas in different content ranges so as to provide a theory basis for future industrial hydrogen fluoride gas absorption devices.

The invention discloses a self-adaptive control device and a self-adaptive control method for an LED electric light source based on optimal light effect. The self-adaptive control device is characterized by comprising a rectifier module, a PFC module, an LED module, an MCU control module, a temperature detection module, an illumination detection module, a constant current driver module and a current detection module. According to the self-adaptive control device and the self-adaptive control method, the working current of the LED electric light source can be automatically adjusted through the MCU control module, so that the heat generated by the LED electric light source can be reduced, the working temperature of the LED electric light source is reduced, and then the light effect of the LED electric light source is improved, and the intelligentization of the LED electric light source is improved.

The invention discloses a high-linearity modulation chip and method based on a dual-output silicon-based series push-pull Mach-Zehnder modulator. According to the invention, a dual-output silicon-based carrier depletion mode modulator is designed, and the silicon-based modulator is arranged at a minimum working point. The optical power input by a laser is divided into two paths through an on-chip optical power divider, one path of optical signal serves as an optical carrier and is modulated by an electric signal through a silicon-based modulator, and the other path of optical signal serves as an optical local oscillation signal and is used for compensating and suppressing modulation nonlinearity in the modulated optical signal. Finally, two paths of complementary output optical signals and optical local oscillation signals of the silicon-based modulator are combined through two silicon-based multimode interferometers, so that the third-order electro-optical nonlinearity of the modulator is suppressed. Meanwhile, a 3dB optical power divider and a silicon optical delay waveguide with a specific length are integrated on a chip, and a receiving end can suppress second-order nonlinearity with a specific frequency by using a balance detector, so that high-linearity modulation of the silicon-based modulator is realized.

The invention discloses a laser power control system, comprising an optical polarization module, an electromechanical control system, a laser power detection system, a temperature monitoring system and a microscopic observation system, wherein the electromechanical control system comprises a rotary table and a stepper motor controller; the laser power detection system comprises a power meter and a power reader; the microscopic observation system comprises a camera and a monitor; the optical polarization module comprises a lambda / 4 wave plate and a polarization beam splitter; and the electromechanical control system controls movement and rotation of the optical polarization module. The invention also discloses a laser heating system. The laser power control system and the laser heating system can effectively control power of laser heating and can acquire stable, adjustable and evenly-distributed sample temperature in a diamond anvil cell (DAC).

The invention provides a fuel battery device and a heat layout method thereof. The device comprises a negative electrode plate, a membrane electrode, a positive electrode plate, a fuel storage cavity,a negative electrode plate electrode and a positive electrode plate electrode, wherein the membrane electrode is positioned between the negative electrode plate and the positive electrode plate; a negative electrode heating wire is embedded onto the negative electrode plate; a positive electrode heating wire is embedded onto the positive electrode plate. The method comprises the following steps of determining the quantity and the dimension of the fuel battery component requiring the layout, the quantity and the dimension of the fuel battery component and external electronic devices, and the circuit board dimension; building a fitness function; performing primary judging on the optimum coordinate capable of realizing the layout on the fuel battery component and other electronic devices; finding the optimum coordinates of all electronic devices on the basis of enabling the fuel battery component total temperature to be optimum; the fuel battery component and other electronic devices aresubjected to layout on a circuit board according to the found optimum coordinates. The fuel battery component and the heat layout method can better adapt to the heat layout of the fuel battery components.

The invention discloses a novel Stirling air cooling frost-free refrigerator and a temperature control method thereof, the novel Stirling air cooling frost-free refrigerator comprises a refrigerator body and a refrigerating unit, and the refrigerating unit is arranged on the upper portion of the refrigerator body; a freezing chamber and a refrigerating chamber are formed in the lower portion of the refrigerator body; the refrigerating unit comprises a linear compressor, two split-type pneumatic Stirling refrigerating machines, air supplying pipelines, two adjusting switches, two cold end heatexchangers and two cool conducting draught fans; the linear compressor communicates with the two pneumatic Stirling refrigerating machines through the two air supplying pipelines, and the two pneumatic Stirling refrigerating machines are used for refrigerating of the freezing chamber and the refrigerating chamber correspondingly; one end of each cold end heat exchanger is connected with a cold head of the corresponding Stirling refrigerating machine, and the other end of each cold end heat exchanger is in a semi-circular fin shape; and the cool conducting draught fans are arranged beside the cold end heat exchangers and used for circulating of cold air, and the two adjusting switches are arranged on the two air supplying pipelines correspondingly and used for adjusting the refrigerating capacity and the refrigerating temperature of the two pneumatic Stirling refrigerating machines, and thus the temperatures of the freezing chamber and the refrigerating chamber are controlled.

The invention discloses an optimal design method and system of a current transformer electricity-taking power supply, and the method comprises the steps: building an electricity-taking current transformer output model considering the influence of an electric energy processing module, and obtaining the maximum output power and a condition when the maximum power is output; according to the obtained maximum output power, calculating the inner diameter, the outer diameter and the width of the magnetic core when the maximum power is output under the limitation of volume and weight by utilizing a genetic algorithm; selecting a magnetic core by using the obtained magnetic core design parameters, constructing a Jiles-Atherton model hysteresis model, and obtaining magnetic core Jiles-Atherton model parameters through parameter identification; solving an optimal coil turn number N; and according to the obtained maximum output power, the inner diameter, the outer diameter and the width of the magnetic core at the maximum power, the Jiles-Atherton model parameters of the magnetic core and the optimal number of turns of the coil, designing and completing the power supply of the current transformer in cooperation with an electric energy processing module. According to the invention, the power supply can work in an unsaturated region under a specified limited condition and output the maximum power.

The invention discloses a dual-rectangular hollow laser based on a spherical aberration regulation-control thermal-stability region and laser shaping and amplification, and belongs to the technical field of laser. The dual-rectangular hollow laser comprises a local oscillator stage and an amplification stage; a local oscillator pump, a focusing coupling lens group, a total-reflection-cavity mirror, a local oscillator gain dielectric rod, an auxiliary lens and a local oscillator output coupling lens are optically and coaxially arranged in sequence; the total-reflection-cavity mirror is a plano-concave lens, and the concave surface of plano-concave lens faces to the local oscillator gain dielectric rod; the local oscillator pump is 10-40W in output power; the auxiliary lens is a positive lens; the circular cone lens group in the amplification stage pumping light source comprises two positive circular cone lens which are arranged in opposite; a middle-transmission reflective mirror is positioned on the optical axis on one side of the output end of the circular cone lens group, and an angle of 45 degrees is formed between the middle-transmission reflective mirror and the optical axis; the amplification gain dielectric rod is positioned between one side of the middle-transmission reflective mirror and an external-transmission reflective mirror; and the external-transmission reflective mirror is perpendicular to the optical axis of the amplification gain dielectric rod. Dual-half Gaussian hollow resonant light is obtained based on the spherical aberration regulation-control thermal-stability region; and then the dual-half Gaussian hollow resonant light is shaped and amplified through inverse dual-half Gaussian hollow pump light to obtain the dual-rectangular hollow laser.

The set has self-ignition diesel engines (100, 100I, 100II) provided with two cylinder banks (12) in V-arrangement. The engines comprise mounting elements (21, 23) for assembly of two turbo superchargers (22), air filter (28), oxidizing catalytic converter (34) and a diesel particulate filter (38) that are mounted in an equal relative position to the engines at a loading and / or exhaust system. An exhaust gas manifold of the engines is arranged on a side of the cylinder banks. The turbo superchargers are arranged in a sequential manner. Thus, motor vehicle having different braking schemes can be manufactured in a condition of low storage and assembly cost.

The invention discloses a heat-pump water heater and a control method thereof. The heat-pump water heater comprises a water tank, a detection unit, a compressor and a control unit, wherein the detection unit is used for detecting the water temperature in the water tank to obtain detected water temperature; a motor coil of the compressor is provided with multistage windings, the resistance value of the nth winding of the multistage windings is less than that of the (n-1)th winding of the multistage windings, and n is a natural number larger than 2; the control unit is connected with the detection unit and the compressor and used for searching for windings corresponding to the detected water temperature to obtain the pth winding and controlling the compressor to adopt the pth winding for operation. According to the heat-pump water heater and the control method, the problem that the performance of a heat-pump water heater declines as the water temperature rises in the prior art is solved, and therefore the overall performance of the heat-pump water heater is improved.

The invention provides a geometric symmetry approximation method of a multi-degree-of-freedom electrostatic suspension system based on iterative adjustment. In the method, horizontally moving-rotatingmulti-degree-of-freedom system is regarded as a plurality of independent translational freedom degrees, and a variable pre-load voltage method is adopted for carrying out sequential and circular iterative adjustment on the symmetry of each degree of freedom. A multi-degree-of-freedom suspension body can be adjusted to the geometric symmetry center of an electrode cage only through limited times of iteration. According to the invention, the influence of coupling force between multiple degrees of freedom can be overcome, and the whole process can be complete automatically. The method can be widely applied to high-precision sensing and ultra-precision vibration reduction control based on electrostatic suspension technology, so that the system has self-calibration and environment-adaptive capacity and the system can be retained at the optimal working point. In this way, precise instruments and the precise equipment can be ensured to play the required performance.

An optical module provided by the invention comprises a circuit board, a light source, and a silicon optical chip, an MCU, a first sampling circuit, a second sampling circuit and a locking circuit which are arranged on the circuit board, wherein the silicon optical chip receives light which is emitted by the light source and does not carry a signal through an input light port of the silicon optical chip, modulates the light which does not carry the signal into signal light and outputs the signal light through an output light port of the silicon optical chip; the MCU is connected with a direct current bias signal interface of the silicon optical chip; the first sampling circuit is connected with a first monitoring light port of the silicon optical chip, receives the signal light transmitted by the first monitoring light port and outputs a first sampling voltage; the second sampling circuit is connected with a second monitoring light port of the silicon optical chip, receives the signal light transmitted by the second monitoring light port and outputs a second sampling voltage; and the locking circuit is connected with the direct current bias signal interface of the silicon optical chip. In the optical module, the amplitude of the first sampling voltage and the amplitude of the second sampling voltage approach each other, so that the silicon optical chip is maintained at the optimal working point.

The invention discloses a heat pump water heater and a control method thereof. Wherein, the heat pump water heater includes: a water tank; a detection unit for detecting the water temperature in the water tank to obtain the detected water temperature; a compressor, the motor coil of the compressor has a multi-level winding, wherein the resistance value of the nth winding of the multi-level winding is less than The resistance value of the n-1th winding in the multi-level winding, where n is a natural number greater than 2; and the control unit, which is connected to the detection unit and the compressor, is used to find the winding corresponding to the detected water temperature, and obtain the pth winding , and control the compressor to operate with the pth winding. The present invention solves the problem of performance degradation of the heat pump water heater in the prior art as the water temperature rises, and further achieves the effect of improving the overall performance of the heat pump water heater.

A method and a circuit for controlling light power output and extinction ratio of a light emitting machine applies an APC circuit and back-lighted phototube monitor to alter Ibias and regulate Pav. The method includes setting an initial working point of a light source under the ordinary temperature, designing the allowed variation sphere for Pav, Ibias, Ith, OMA, ER and Imo to utilize APC to make Pav unchanged and monitor other variable quantities, when variables of temperature and time surpass the variation sphere, then other variables are regulated to restore the controlled variables to original spheres, computing Pav, I bias, Ith and SE ordinary temperature set value and regulating Imod to enable OMA and ER at the initial set value. The circuit includes a driver, a digital potentiometer, a microprocessor and a laser etc.

The invention relates to a current control method of a stator permanent magnet type memory motor based on a non-permanent magnet flux observer. According to the magnetization state of the permanent magnet, select k Permanent magnet flux linkage, and calculate the corresponding speed range; then given by the speed n * and the speed given at the previous moment n ** Determine the change direction of the given speed; n * Satisfied speed range determines the speed given n * The corresponding permanent magnet flux linkage; finally based on the speed given n * , the change direction of the given rotational speed and the flux linkage of the permanent magnet determine the magnetization process of the permanent magnet. The invention has the advantages of easy realization, strong robustness, avoiding frequent adjustment of magnetization state or even failure of adjustment of magnetization state, and the like.

The invention provides a geometric symmetry approximation method of a multi-degree-of-freedom electrostatic suspension system based on iterative adjustment. In the method, horizontally moving-rotatingmulti-degree-of-freedom system is regarded as a plurality of independent translational freedom degrees, and a variable pre-load voltage method is adopted for carrying out sequential and circular iterative adjustment on the symmetry of each degree of freedom. A multi-degree-of-freedom suspension body can be adjusted to the geometric symmetry center of an electrode cage only through limited times of iteration. According to the invention, the influence of coupling force between multiple degrees of freedom can be overcome, and the whole process can be complete automatically. The method can be widely applied to high-precision sensing and ultra-precision vibration reduction control based on electrostatic suspension technology, so that the system has self-calibration and environment-adaptive capacity and the system can be retained at the optimal working point. In this way, precise instruments and the precise equipment can be ensured to play the required performance.