18results about How to "Shorten the stabilization time" patented technology

The invention relates to an impurity detection system for high-purity gas and a detection control method thereof, and the impurity detection system for the high-purity gas comprises a detection path selection module, a busbar sample introduction module, a chromatography pretreatment module and a moisture detection pretreatment module, the detection path selection module is connected with confluence path units contained in the busbar sample introduction module, the chromatography pretreatment module comprises a plurality of chromatography pretreatment units, the confluence path units are respectively connected with the corresponding chromatography pretreatment units, each confluence path unit is connected with the moisture detection pretreatment module, and the moisture detection pretreatment module is connected with the detection path selection module. The detection path selection module is used for acquiring storage information in a high-purity gas storage tank, and performing corresponding chromatographic analysis steps and / or moisture detection analysis steps on the high-purity gas according to the storage information; the opportunity and parameters of gas entering the detection equipment are automatically adjusted according to the storage states of different steel cylinders, so that the accuracy of a detection result is improved.

The invention relates to the field of wheat breeding, in particular to a rapid breeding method of waxy wheat. The invention provides a rapid breeding method of waxy wheat, which combines a plurality of experimental techniques such as tissue culture, KASP molecular marker and iodine staining identification, and can rapidly create a new line of waxy wheat. According to the method, the breeding time can be effectively and remarkably shortened, and a new method is provided for wheat variety improvement.

This invention belongs to the field of heat load regulation technology, specifically relating to an air-conditioned comfort environment laboratory with controllable heat load, comprising an inner chamber, an outer chamber, and an air circulation system. Both the inner and outer chambers are enclosed spaces, with the inner chamber located within the outer chamber and enclosed by insulation material. The air circulation system includes an intake airway and an exhaust airway connecting the inner and outer chambers. This invention controls the heat load within the inner chamber by changing the amount of hot or cold air entering the outer chamber through the air circulation system. This solves the common problems of difficult load regulation and inaccurate load calculation in brick-walled thermal environment test chambers, and avoids the problem of insufficient load in previous laboratories based on insulated panels. Furthermore, it has advantages over the condensation problem on the inner chamber walls caused by using water coils to apply the load. It reduces the environmental stabilization time and significantly improves the utilization rate of the laboratory.

The application discloses a driving motor, a camera module and an electronic device, and belongs to the technical field of camera modules. The driving motor comprises a shell, a carrier, a magnetic piece and a coil assembly. The carrier is located in the shell and is used for carrying a lens. The magnetic piece is connected with the carrier. The coil assembly is connected with the shell. The coil assembly comprises a first coil and a second coil. When the coil assembly is in a first energization state, the first coil and the second coil generate electromagnetic forces of the same direction on the magnetic piece, so that the magnetic piece drives the carrier to move. When the coil assembly is in a second energization state, the first coil and the second coil generate electromagnetic forces of opposite directions on the magnetic piece.

The application provides a duty cycle correction circuit and a chip, a pre-charging module is added, and a capacitor can be pre-charged to a predetermined voltage after each comparison of a comparator ends, so that the charging time of a charge pump module on two charging and discharging nodes can be shortened, the analog voltage output by the two charging and discharging nodes can quickly reach the input voltage value at which the comparator can compare in the next comparison, the starting time required by the comparator for each comparison is shortened, the response time and the stabilization time of the loop of the duty cycle correction circuit itself are shortened, the clock duty cycle calibration efficiency is finally improved, and the transmission rate of a signal is improved.

The invention relates to the technical field of sensors, in particular to a multi-dimensional force sensor which comprises a shell, an elastic body, a supporting structure and a plurality of dampers. The elastic body is arranged in the shell and comprises a load input end for receiving an external load and a mounting part connected with the shell, and the elastic body is used for generating deformation in response to the external load; the supporting structure is arranged on the periphery of the elastic body in a sleeving mode and located in the shell, and the supporting structure is connected with the load input end; the multiple dampers are arranged between the supporting structure and the shell; wherein the damper is configured to dissipate the vibration energy of the elastic body through a viscous dissipation effect or flexible deformation. According to the multi-dimensional force sensor provided by the invention, the dynamic performance can be directly and effectively improved from a mechanical structure, the self vibration is inhibited, and the response time is shortened.

A microgrid wind-storage-load layered coordinated frequency modulation control method, the method comprising the following steps: S1, based on the operating characteristics of each resource in the microgrid system, establish a wind-storage-load layered coordinated frequency modulation control architecture; S2, respectively establish frequency modulation control models for gas turbines, doubly-fed wind turbines, energy storage systems and controllable loads, and establish an overall frequency response model of the microgrid system; S3, establish a prediction model for the frequency response characteristic index of the microgrid system, and use the maximum frequency deviation as the frequency stratification index, propose a wind-storage-load layered coordinated frequency modulation control strategy based on the prediction model, and compensate the power absorbed by the wind turbine through the energy storage system during the wind turbine speed recovery stage. The present invention can control the wind turbine, energy storage system and controllable load to participate in frequency modulation in advance, thereby improving the system frequency stability.

This utility model discloses a sliding quick positioning assembly for metal guide rails, relating to the field of guide rail technology. It includes a guide rail body with a positioning mechanism. The positioning mechanism comprises a mounting frame, several cylinders, a push plate, several moving frames, a fixing pad, several moving cylinders, a moving column, and a support plate. The mounting frame is fixed to the bottom of both sides of the guide rail body. Several cylinders are fixedly mounted on one side of the mounting frame, with the cylinder output ends extending into the mounting frame. The push plate is fixedly mounted on the corresponding cylinder output end. In the technical solution provided by this utility model, by setting the positioning mechanism, the cylinders control the push plate to move laterally. The push plate supports the support plate, causing the moving frames and the fixing pads on them to move upwards. When the slider on the guide rail body is positioned, the fixing pads support the bottom of the slider, increasing damping, reducing the small displacement of the slider due to vibration, reducing the reverse rebound of the slider, shortening the stabilization time, and making the slider positioning faster and more stable.

The invention provides a rapid measurement method for a mass transfer critical water stoichiometric ratio of a proton exchange membrane electrolytic cell, which comprises the following steps: carrying out electrolysis by the electrolytic cell at an initial voltage, increasing the voltage once every a period of time to carry out voltage forward scanning, and recording the current in the whole process. And when the current is reduced after the voltage is increased, the current is operated to be stable at the current. And taking the voltage as a reference, reducing the voltage once at set intervals for negative scanning, and recording a corresponding current value. When the current is kept stable instead of being increased due to reduction of the voltage, the voltage and the current at the moment are critical points at which the electrolytic tank starts to be limited by mass transfer, namely the mass transfer critical points. And calculating the mass transfer critical water stoichiometric ratio by using the current value of the mass transfer critical point and the water supply flow. According to the method, positive scanning and negative scanning of polarization curve voltage of electrolyzed water are combined, and rapid measurement of the mass transfer critical water stoichiometric ratio can be achieved under the condition that damage to a membrane electrode is extremely small.

The invention relates to the technical field of motor control, and discloses an LADRC permanent magnet synchronous motor control system and method based on a superspiral sliding mode, and the system comprises a motor control inverter system which is used for receiving a dq-axis stator voltage component, and generating a three-phase current signal of a permanent magnet synchronous motor; the current acquisition subsystem is used for receiving the three-phase current signal and generating a dq-axis stator current component through Clark change and Park conversion; the first speed ring controller is used for designing a self-adaptive bandwidth function and introducing a super-spiral sliding mode algorithm according to the target rotating speed and the actual rotating speed of the motor, and generating a corrected q-axis stator current component by performing error correction on a control system; the second current loop controller is used for performing q-axis PI control to obtain a q-axis stator voltage component; the third current loop controller is used for performing d-axis PI control to obtain a d-axis stator voltage component; according to the invention, buffeting of the control system is effectively reduced, and the anti-interference capability and the control performance of the control system under different working conditions are improved.

The application discloses a broadband phase-shifting frequency discriminator, and relates to the field of frequency discriminators, comprising a mixed phase-shifting architecture, a multimode phase discrimination unit, a dynamic signal quality evaluation unit, a control unit and an intelligent preprocessing interface; the mixed phase-shifting architecture comprises a first path and a second path arranged in parallel, the first path is a high-precision digital control phase-shifting path, and the second path is a fast continuous analog phase-shifting path. The mixed phase-shifting architecture combining the digital control phase-shifting path coarse adjustment and the analog phase-shifting path closed-loop fine adjustment is adopted, fast presetting and high-precision tracking of the phase in a wide frequency band are realized, and the problem of insufficient response speed and precision of the traditional scheme is solved; the dynamic signal quality evaluation unit is used for monitoring signal power, signal-to-noise ratio and interference characteristics in real time, and the multimode phase discrimination unit is controlled to adaptively switch a high-sensitivity mode and a high-dynamic-range mode, so that the stability of phase discrimination in a complex electromagnetic environment is ensured.

The invention discloses a cell population formation-oriented shape constraint synchronous control method, which comprises the following steps of: 1, analyzing and establishing a viscosity-dominated cytodynamics simplified model based on the order of magnitude of Reynolds number, and ignoring an inertial effect; step 2, adopting a time-varying shape adjustment strategy, constructing a cell population target formation in a hyperelliptic configuration, and giving an expected position; 3, constructing a position tracking error and a synchronization error; 4, designing a distributed synchronous controller containing coupling error feedback and gain adjustment, calculating an optical trap position instruction, and realizing cell population coordinated regulation and control; and 5, inputting the light trap position instruction into a control module of the multi-laser-beam optical tweezers system, or inputting the light trap position instruction into a corresponding simulation platform to update the light trap position so as to drive each cell to realize formation synchronous movement under the dynamic hyper-elliptical target formation. According to the method, the formation consistency and synchronism of the cell groups can be kept in the dynamic shape adjustment process, and good stability and robustness are achieved.

This invention relates to the field of heat pump control technology, and discloses a model-predictive CO2 heat pump defrosting control method and system. The method includes: collecting CO2 heat pump heating operation data; determining a frosting impact assessment coefficient by the deviation between the actual and theoretical heat exchange temperature difference; identifying the frosting deterioration period based on coefficient changes; and generating a defrosting start indicator by combining the inflection point of the return water temperature change rate. Based on this indicator, the valve opening degree and compressor frequency are sequentially configured to form a corresponding modulation sequence, driving the actuators and switching the defrosting mode when the exhaust pressure reaches the transition equilibrium point. Subsequently, a defrosting progress index is determined based on the temporal relationship between the extreme point of the heat exchanger outlet temperature and the saturation point of the compressor suction pressure. Finally, parameters are adjusted according to this index to generate a heating recovery command, achieving precise defrosting control and heating recovery. This invention can improve the efficiency of model-predictive CO2 heat pump defrosting control.

The invention relates to a fuel cell test fixture temperature control method and system based on dynamic PID optimization, and the method comprises the steps: obtaining a target working temperature and a temperature uniformity threshold value of a fuel cell test fixture, dividing the target working temperature and the temperature uniformity threshold value into a plurality of heating temperature difference intervals, and configuring differentiated PID initial parameters for each heating temperature difference interval; synchronously acquiring temperature data of a plurality of areas of the fuel cell test fixture in real time, and calculating the overall average temperature of the fixture and local temperature differences among the areas; judging whether the current state is in an overall heating demand state or an overall cooling demand state, and judging whether local temperature compensation is needed or not based on the relationship between the local temperature difference and a temperature uniformity threshold value; and the dynamic PID parameter corresponding to the current heating temperature difference interval is finely adjusted periodically according to the overall temperature fluctuation and the local temperature difference condition in the temperature control process.

The invention discloses an intelligent control system and method for the internal temperature of a frequency conversion cabinet, particularly relates to the field of electrical automation control, and is used for solving the problems of unstable temperature and humidity, water condensation and local overheating caused by air flow backflow between a power partition and a control partition of the frequency conversion cabinet. The method comprises the steps that a backflow state and a priority side partition are generated by monitoring a partition pressure difference signal sequence and applying absorption Markov chain analysis, when backflow is effective, a cooperative instruction is issued to link an air guide component and an exhaust fan to execute pressure difference balancing, then partition representative temperature is read, small-amplitude iteration checking is conducted till the partition representative temperature is stable, and the instruction is solidified; and after a maintenance or load event is finished, a curing instruction is reused to realize a rapid reset strategy, so that uniform temperature distribution and insulation reliability in the cabinet are maintained.

The invention discloses a broadband phase-shift frequency discriminator, which relates to the field of frequency discriminators and comprises a hybrid phase-shift framework, a multimode phase discrimination unit, a dynamic signal quality evaluation unit, a control unit and an intelligent preprocessing interface, the hybrid phase shift architecture comprises a first path and a second path which are arranged in parallel, the first path is a high-precision numerical control phase shift path, and the second path is a fast continuous analog phase shift path. According to the invention, by adopting a mixed type phase-shifting architecture combining numerical control phase-shifting path coarse tuning and analog phase-shifting path closed-loop fine tuning, rapid presetting and high-precision tracking of phases in a broadband are realized, and the problem that the response speed and precision of a traditional scheme are insufficient is solved; the dynamic signal quality evaluation unit is used for monitoring signal power, a signal-to-noise ratio and interference characteristics in real time and controlling the multimode phase discrimination unit to adaptively switch a high-sensitivity mode and a high-dynamic range mode, so that the stability of phase discrimination in a complex electromagnetic environment is ensured.