33results about How to "Slow time lag" patented technology

The invention provides a parallel-air inlet type rear duct ejector in a variable cycle engine adjustable mechanism. The parallel-air inlet type rear duct ejector comprises an actuator cylinder, a link arm, a rotating shaft, a sleeve, a bearing, a bearing pedestal, an elastic collar, a connecting rod, an inner engine case, an outer engine case, a valve body, a sliding strip, a friction block and a friction block installation platform. According to the parallel-air inlet type rear duct ejector in the variable cycle engine adjustable mechanism, the actuator cylinder is used for carrying out driving, so that the outlet area of an engine outer duct is continuously adjustable, the structure is simple, the number of parts is small, the weight is low, and the parallel-air inlet type rear duct ejector is higher in stability and reliability compared with the design scheme of an existing variable cycle engine rear duct ejector.

The invention provides a software updating instruction distributing method, a communication server and a terminal device. The method comprises the following steps that long connection with at least one terminal device is established; a message including software version information is sent to the terminal device, so that the terminal device judges whether software updating is needed or not according to the software version information, and if so, software updating data is obtained from an updating server in a multicast communication mode. The communication server comprises an establishing unit and a sending unit, wherein the establishing unit is used for establishing long connection with at least one terminal device, the sending unit is used for sending the message including the software version information, so that the terminal device judges whether software updating is needed or not according to the software version information, and if so, software updating data is obtained from the updating server in the multicast communication mode. The problems that the software updating instruction distributing delay is great, and in addition, a large number of resources of a control center need to be occupied are solved.

Embodiments of the present application provide a driver portrait method, system and apparatus. The method includes: acquiring the first service data generated by the transport service in real time; according to the first service data and the first portrait result, instantaneously portraying the driver to obtain a second portrait result; storing the second portrait result for subsequent use. The technical scheme provided by the embodiment of the present application can portray a driver in real time according to the first service data, so as to satisfy the high real-time query demand of the instant distribution service for the driver portrait.

The invention provides an in-orbit high-precision real-time positioning method based on optical images. The in-orbit high-precision real-time positioning method comprises the steps that: relevant parameters in a strict geometric imaging model are classified and equalized, and the strict geometric imaging model is equivalent to an on-satellite geometric positioning model; parameters of the on-satellite geometric positioning model are corrected by utilizing a control point of a ground calibration field; and the corrected parameters are registered to a satellite. Since the traditional strict geometric imaging model is subjected to board division and optimization, the strict geometric imaging model is equivalent to the on-satellite geometric positioning model, the on-satellite geometric positioning model can adapt to the situation of limited on-satellite resources, the time hysteresis of positioning is reduced through real-time positioning treatment by means of the on-satellite geometric positioning model, the pressure on a digital transmission system by massive data downward-transfer is reduced, and finally errors of the system are reduced by adopting a parameter correction method based on satellite-ground collaboration, thereby improving the positioning precision.

The invention discloses a WIFI indoor positioning method and system for a large-scale complex scene, and the method comprises the steps: constructing a position fingerprint database of a positioning region based on the reference point information of the positioning region; performing clustering analysis on the position fingerprint database to generate a plurality of initial clustering results of the position fingerprints; constructing a weighted similarity matrix of the position fingerprint database based on the initial clustering result, and dividing the position fingerprint data in the position fingerprint database into a plurality of grids based on the weighted similarity matrix; matching the RSSI data acquired in real time with each grid center of a position fingerprint database, and dividing the to-be-positioned target into the grid with the highest matching degree; and in the grid with the highest matching degree, obtaining a positioning result of the target by utilizing a presetmatching algorithm. According to the method, the influence of noise and singular values on the positioning result can be effectively suppressed, so that the reliability and effectiveness of the indoor positioning result are ensured, and the positioning result generation efficiency is remarkably improved by reducing the calculated amount in the online matching stage.

The invention discloses a breathing machine. The breathing machine comprises an air breathing pipe, an expiring pipe and an expectoration pipe, wherein the air breathing pipe is provided with a turbofan, an air-breathing-and-expectoration two-position and four-way switching valve and a buffering tank; the expiring pipe is provided with an expiring valve, and the expiring valve is controlled in the mode that a two-position and three-way valve receives compressed gas from the buffering tank; the expectoration pipe is provided with a shutter valve, the air-breathing-and-expectoration two-position and four-way switching valve and the turbofan, wherein the expiring pipe and the expectoration pipe share the air-breathing-and-expectoration two-position and four-way switching valve and the turbofan. The breathing machine also comprises a central processing unit, and cooperatively controls all the parts of the breathing machine according to data detected by a sensor in the breathing machine. The breathing machine allows an expiring machine to be capable of serving as a module to be embedded into the breathing machine, and the breathing machine has the higher accuracy, responsiveness and safety. As the breathing machine is controlled by the same central processing unit, breathing work and expectoration work of the breathing machine reach true synchronization. The air breathing pipe and the expectoration pipe locally share a pneumatic circuit, and the structure of the breathing machine is simpler and more compact.

A chemical mechanical grinding device comprises a grinding disc, a grinding pad arm, a grinding pad, a grinding pulp supply route and a grinding detection device. The grinding disc is used for bearing supplied wafers. One end of the grinding pad is fixed. The grinding pad is fixed at the non-fixed end of the grinding pad arm and is capable of being in motion relative to the supplied wafers when driven by the grinding pad arm, the grinding pad arm determines a motion period, the grinding pad is contacted with the supplied wafers. Grinding pulp is supplied by the grinding pulp supply route between the grinding pad and the grinded wafers during the grinding period. The grinding detection device synchronously detects the grinding state of entire wafers. By means of the chemical mechanical grinding device, synchronism of grinding detection can be improved.

The invention relates to a controllable pollution discharging monitoring method and system. A first data indicator of sewage in a to-be-discharged sewage storage tank is collected at a first preset time interval; when a current first data indicator exceeds the standard and a previous first data indicator meets the standard, a sewage discharging pump and a sewage discharging valve are turned off and discharging of sewage not meeting the standard is stopped; and when the current first data indicator meets the standard and the previous first data indicator exceeds the standard, the sewage discharging pump and the sewage discharging valve are turned off and discharging of the sewage meeting the standard is restored. Therefore, the time delay of stopping of discharging of the sewage not meeting the standard and restoring of discharging of the sewage meeting the standard can be reduced; the pollution situation can be controlled at a light low level; and the impact on normal production and operation of the enterprise can be reduced.

When an aluminum alloy billet obtained by casting molten aluminum alloy continuously in the shape of rod is cut into a predetermined length by means of a cutting device (13) and then the aluminum alloy billet thus cut is loaded in a product transportation container with an identification mark put thereon, the casting conditions and inspection results of the aluminum alloy billet are stored in the storage section (283) of a production management system (28) in correspondence with the identification mark so that the quality and operation of the aluminum alloy billet which is used as a material for machining are stabilized furthermore.

The invention provides a detection method and system for leakage current of a heat exchanger. The detection method comprises the steps of collecting process data of a plurality of sample sets of the heat exchanger, calculating a total heat transfer coefficient through an energy-balance equation with the process data as an input condition, calculating scaling heat resistance through a total heat transfer coefficient equation according to the total heat transfer coefficient, carrying out noise elimination processing on the scaling heat resistance, generating scaling heat resistance after noise elimination, calculating the mean value and variance of the scaling heat resistance after noise elimination according to the scaling heat resistance after noise elimination, and judging whether the heat exchanger leaks or not according to the mean value and the variance. Compared with the prior heat exchange leakage current diagnostic technology, the detection method is high in calculation real-time performance and short in time delay, and is not affected by operation conditions of other devices except for the heat exchanger; the wavelet transform theory is adopted to process field data on line, influence on diagnosis results from noise is weakened, calculation accuracy is improved, implementation is facilitated, and the total cost is low.

Aiming at the current situation that there is no substantial progress in the current electron accelerator beam control strategy, the present invention designs an automatic correction system for the electron accelerator beam path, which is fast and high-precision through a beam displacement detection technology based on a dual-sensor information coupling algorithm. The beam path is detected and the non-contact high-precision beam control is used to realize the automatic adjustment of the beam path based on the cerebellar model neural network PID control, which further simplifies the difficulty of manual operation and makes the operation of the accelerator easier and safer. Through experiments and debugging, the beam current control method of the electron accelerator has been optimized, which can meet the control requirements of the accelerator with higher performance.

The invention provides a system and a method for detecting microorganism metabolite. The method comprises the following steps of firstly, designing a mobile testing end to collect testing results of a microorganism metabolite sample and a microorganism metabolite antibody testing liquid, and measuring the temperature, relative humidity and air pressure; sending the testing results, temperature, relative humidity and air pressure information to a data terminal; enabling the data terminal to compare the received information and the detection and experiment results under different air temperatures, different environment relative humidifies and different air pressure conditions in the pre-experiment, so as to obtain the analyzing result of the organism metabolite; sending the analyzing result to the mobile testing end. The method has the advantages that the problems of performing under the laboratory condition, lagging of detection result time, and low detection efficiency in the existing microorganism metabolite product detection technique are solved; the purposes of simplifying the detection method, improving portability of detection equipment, and improving detection accuracy are reached.

The invention provides a virus antibody detecting system and method. The method comprises the steps that firstly a mobile test terminal is designed, test results of a virus antibody sample and a virus antigen test solution are collected, and meanwhile the temperature, relative humidity and air pressure of this time are measured; then the test results and the temperature, relative humidity and air pressure information are sent to a data terminal, the received information and detection experiment results which are obtained by experiments in advance in different temperature, different environmental relative humidity and different air pressure conditions are contrasted by the data terminal, analysis results of virus antibodies are obtained, and the analysis results are sent to the mobile test terminal. According to the virus antibody detecting system and method, the problems that an existing virus antibody detecting technology needs to be conducted under laboratory conditions, the detecting result time is long and the detecting efficiency is low are solved, and the aims that the detecting method is simplified, the portability of detecting devices is improved, and the detecting precision is improved are achieved.

The embodiment of the invention discloses a valve hysteresis compensation method and device, electronic equipment and a storage medium, wherein the method comprises the steps: obtaining an input current, a circuit model and a mechanical fluid model of a valve, determining a target pressure according to the input current, determining a predicted pressure according to the input current and the mechanical fluid model, determining a first control current according to the target pressure and the predicted pressure, determining a second control current according to the input current and the circuit model, and determining a compensated input current input valve according to the first control current and the second control current. According to the method, the compensation precision is improved, meanwhile, the method is more suitable for the dynamic change condition, the stability is improved, and the requirement for a sensor is reduced, so that the cost is reduced, the dynamic and static response characteristics of the valve are improved, the influence caused by nonlinearity is eliminated, the repeatability is improved, the response time lag is reduced, and thus the performance of the valve is improved.

The invention discloses a method for suppressing ship wake flow disturbance by a shipboard aircraft based on direct lift control. The method specifically comprises the steps of 1 establishing a longitudinal motion nonlinear model of the shipboard aircraft; 2 designing a second-order h-gamma cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing a height state variable and a glide angle state variable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain GL (delta); 3 designinga second-order theta-q cascade active disturbance rejection controller for the nonlinear model form in the step 1, respectively observing an attitude angle state variable and an angular velocity statevariable by adopting an extended state observer, and forming state error feedback and disturbance compensation to obtain Cm (delta); and according to the CL (delta) and the Cm (delta), performing control allocation by using a weighted pseudo-inverse method to obtain an actual rudder offset. According to the invention, the response speed of the shipboard aircraft control system is accelerated, andthe control precision and the anti-interference capability of the shipboard aircraft are effectively improved.

After the aluminum alloy billet obtained by continuous casting of the aluminum alloy melt into a rod shape is cut into a predetermined length by a cutting device (13), when the cut aluminum alloy billet is given an identification mark and loaded into a product transport container, the aluminum alloy The casting conditions, inspection results and identification marks of the alloy billet are stored in the storage unit (283) of the production management device (28), thereby achieving further quality stabilization and operation stabilization of the aluminum alloy billet used as a processing material .

The invention provides a detection method and system for leakage current of a heat exchanger. The detection method comprises the steps of collecting process data of a plurality of sample sets of the heat exchanger, calculating a total heat transfer coefficient through an energy-balance equation with the process data as an input condition, calculating scaling heat resistance through a total heat transfer coefficient equation according to the total heat transfer coefficient, carrying out noise elimination processing on the scaling heat resistance, generating scaling heat resistance after noise elimination, calculating the mean value and variance of the scaling heat resistance after noise elimination according to the scaling heat resistance after noise elimination, and judging whether the heat exchanger leaks or not according to the mean value and the variance. Compared with the prior heat exchange leakage current diagnostic technology, the detection method is high in calculation real-time performance and short in time delay, and is not affected by operation conditions of other devices except for the heat exchanger; the wavelet transform theory is adopted to process field data on line, influence on diagnosis results from noise is weakened, calculation accuracy is improved, implementation is facilitated, and the total cost is low.

The invention discloses an online diagnosis and selective control method and device for leakage current unusual service conditions of a heat exchanger. The online diagnosis method for leakage current unusual service conditions of the heat exchanger comprises the following steps: establishing a dynamic mathematical model of the leakage current unusual service conditions of the heat exchanger; identifying the model gain of the dynamic mathematical model on line by adopting a least squares recursive algorithm; and performing online diagnosis on the leakage current unusual service conditions of the heat exchanger according to the symbol change of the model gain. The selective control method for leakage current unusual service conditions of the heat exchanger comprises the following steps: respectively establishing a normal controller which operates under normal service conditions of the heat exchanger and an abnormal controller which operates under leakage current unusual service conditions of the heat exchanger according to the dynamic mathematical model; setting a selector between the normal controller and the abnormal controller, wherein the selector is switched between the normal controller and the abnormal controller according to the diagnosis result of the online diagnosis method. The method is high in calculation real-time property, small in time delay, convenient to implement and low in total cost.

The invention provides a parallel-air inlet type rear duct ejector in a variable cycle engine adjustable mechanism. The parallel-air inlet type rear duct ejector comprises an actuator cylinder, a link arm, a rotating shaft, a sleeve, a bearing, a bearing pedestal, an elastic collar, a connecting rod, an inner engine case, an outer engine case, a valve body, a sliding strip, a friction block and a friction block installation platform. According to the parallel-air inlet type rear duct ejector in the variable cycle engine adjustable mechanism, the actuator cylinder is used for carrying out driving, so that the outlet area of an engine outer duct is continuously adjustable, the structure is simple, the number of parts is small, the weight is low, and the parallel-air inlet type rear duct ejector is higher in stability and reliability compared with the design scheme of an existing variable cycle engine rear duct ejector.

The invention discloses a WIFI indoor positioning method and system for large-scale and complex scenes. The method includes: constructing a location fingerprint library of the location area based on reference point information of the location area; performing cluster analysis on the location fingerprint library to generate a location Multiple initial clustering results of fingerprints; based on the initial clustering results, construct the weighted similarity matrix of the location fingerprint library, and based on the weighted similarity matrix, divide the location fingerprint data in the location fingerprint library into multiple grids; The obtained RSSI data is matched with each grid center of the location fingerprint library, and the target to be positioned is divided into the grid with the highest matching degree; in the grid with the highest matching degree, the positioning result of the target is obtained by using the preset matching algorithm. The invention can effectively suppress the influence of noise and singular value on the positioning result, thereby ensuring the reliability and effectiveness of the indoor positioning result, and significantly improving the generation efficiency of the positioning result by reducing the calculation amount in the online matching stage.

The invention discloses a vehicle active collision avoidance system based on VII support, comprising a short-distance wireless communication terminal, a road side base station and a traffic information service center, wherein, the short-distance wireless communication terminal is installed in a vehicle; the vehicle-mounted short-distance wireless communication terminals of the vehicles in local road sections form a wireless communication local area network; a road side base is arranged at a road side, various sensors arranged on the vehicle obtains the data information through uploading and collecting by CAN buses; the short-distance wireless communication terminal is provided with a danger warning information publisher; when the dangerous condition such as potential rear-end collision and the like exists, the danger warning information publisher is activated; the danger warning information is published in a broadcast manner through the short-distance wireless communication; after theshort-distance wireless communication terminals on other vehicles receive the danger warning information, a central controller safety status judgment module analyzes the critical following distance required in preventing rear-end collision with abnormal running vehicles in a current running state. The vehicle active collision avoidance system of the invention can effectively reduce time delay andimprove reliability.

The invention relates to a high-speed electromagnetic valve control system and method adapting to working conditions and controlling parameter changes. The system comprises an upper computer, a switching signal generator, a controller, a voltage source, a current sensor, a current differential processing module, a pressure detection system and a high-speed electromagnetic valve, and the voltage source comprises a variable positive voltage source and a negative voltage source; in the valve element opening stage, whether a valve element is fully opened or not is judged through current and derivative feedback information of the current; in the full-open stage of the valve element, high-frequency PWM voltage which is adaptive to the pressure working conditions and controlling parameter changes is applied; and in the valve element closing stage, the closing excitation time, the zero current maintaining time and the pre-excitation time are optimally distributed, and the amplitude of the pre-excitation voltage is regulated and controlled in a self-adaptive mode. According to the system and method, high-dynamic control over the high-speed electromagnetic valve can be achieved only by setting the control parameters of the switching signals, the response time is shortened, energy consumption is reduced, the duty ratio range for achieving full opening and full closing of the valve element under high frequency is widened, and control accuracy, adaptability and robustness are improved.

The invention discloses a VC-based ADO technology high-speed parallel communication system and a working method thereof, which is characterized by comprising a synchronous sampling and filter circuit, a direct current voltage stabilizing circuit, a host computer and a parallel control port circuit, a data selection buffer, and a pulse signal clock generator; the working method comprises: 1. inputting an analog signal and converting the analog signal into a digital signal; 2. transmitting data to a parallel control port; and 3. the host computer receiving and storing the data; the system and method of the invention has the advantages of realizing the high-speed real-time parallel communication transmission of data, improving the speed and precision of the control, leading each module to be provided with good regulation performance and reliability, enhancing stability in a transmission process, and guaranteeing the system running safely; and the circuit of the system has simple design, good practicability, stable circuit working and high reliability; and integrates low power consumption with excellent dynamic performance, thus being a desirable selection for portable applications with sensitive power consumption, such as, ultrasonic and medical imaging, portable instrument, and low power consumption data acquisition system, etc.

The invention provides a microorganism detection system and a microorganism detection method. The method comprises the following steps: firstly designing one mobile test terminal for acquiring test results of a microorganism sample and a microorganism antibody test solution, and measuring temperature, relative humidity and air pressure at the moment; then transmitting the test results and the temperature, relative humidity and air pressure information to a data terminal, and comparing the received information with detection experimental results obtained through experiments in advance at different air temperature, environment relative humidity and air pressure conditions by the data terminal, so that an analysis result for microorganisms is obtained; and sending the analysis result to the mobile test terminal. The microorganism detection system and method have the advantages that the problems that an existing microorganism detection technology needs to be carried out under laboratory conditions, detection result time is lagged and detection efficiency is low are solved, and the aims of simplifying the detection method, increasing portability of detection equipment and improving detection accuracy are achieved.

The invention provides a respirator. The respirator comprises an inspiration pipeline, an expiration pipeline, an expectoration pipeline and a central processing unit; the inspiration pipeline is provided with a positive pressure source for supplying positive pressure to a patient, a buffer tank and a two-position two-way balloon valve, and the two-position two-way balloon valve is subjected to on-off switching control through an air pump and a first two-position three-way valve; the expiration pipeline is provided with an expiration valve which is controlled though a second two-position three-way valve by receiving compressed air which is from the buffer tank and has preset constant pressure; the expectoration pipeline is provided with a negative pressure source for supplying negative pressure to the patient and a fast valve which is connected between the negative pressure source and the patient in series; the central processing unit conducts cooperative control over all the parts of the respirator according to data detected by a sensor in the respirator. According to the respirator, an expectoration machine can be embedded into the respirator by serving as a module, and higher precision, responsibility and safety are achieved; by adopting the same central processing unit, the system structure is simplified, and respiration and expectoration work of the respirator can achieve real synchronousness.

The invention discloses a VC-based ADO technology high-speed parallel communication system and a working method thereof, which is characterized by comprising a synchronous sampling and filter circuit, a direct current voltage stabilizing circuit, a host computer and a parallel control port circuit, a data selection buffer, and a pulse signal clock generator; the working method comprises: 1. inputting an analog signal and converting the analog signal into a digital signal; 2. transmitting data to a parallel control port; and 3. the host computer receiving and storing the data; the system and method of the invention has the advantages of realizing the high-speed real-time parallel communication transmission of data, improving the speed and precision of the control, leading each module to beprovided with good regulation performance and reliability, enhancing stability in a transmission process, and guaranteeing the system running safely; and the circuit of the system has simple design, good practicability, stable circuit working and high reliability; and integrates low power consumption with excellent dynamic performance, thus being a desirable selection for portable applications with sensitive power consumption, such as, ultrasonic and medical imaging, portable instrument, and low power consumption data acquisition system, etc.

A vehicle is provided with: a drive system clutch (Fwd / C) disposed between the engine (1) and drive wheels (7); a torque converter (2) disposed between the drive system clutch (Fwd / C) and the engine (1) and equipped with a lock-up clutch (9), in which the magnitude of power transmission is controlled by hydraulic pressure; and an electric oil pump (50) capable of supplying hydraulic pressure whilethe engine (1) is stopped. Said engined car coasts as a result of sailing stop control in which, when a sailing stop travel condition is met, power transmission by the drive system clutch (Fwd / C) isblocked and the engine (1) is stopped. While coasting under sailing stop control, hydraulic pressure for putting the lock-up clutch (9) into a power-transmitting state is applied to the lock-up clutch(9).

The invention discloses a phase imbalance detection method, system and device for a distribution transformer and a storage medium. The method comprises the following steps: extracting a positive sequence component, a negative sequence component and a zero sequence component of a three-phase voltage in a dq-axis rotating coordinate system; performing Park transformation on the positive sequence component, the negative sequence component and the zero sequence component, and synchronizing a dq-axis rotating coordinate system and an unbalanced three-phase system by using a phase-locked loop; obtaining values of the positive sequence component, the negative sequence component and the zero sequence component in the dq-axis rotating coordinate system; performing inverse Park transformation on the values of the positive sequence component, the negative sequence component and the zero sequence component in the dq-axis rotating coordinate system to obtain a three-phase voltage value with an imaginary part; according to the three-phase voltage value with the imaginary part, calculating the amplitude and the phase through an MATLAB algorithm, and detecting the phase imbalance state of the distribution transformer according to the amplitude and the phase. The time delay of phase estimation can be effectively reduced, the timeliness is enhanced, and the imbalance of the amplitude and / or phase angle of each phase A, B and C in a three-phase imbalance state can be accurately reflected.