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.

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 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 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 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 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 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 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.

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.