148results about How to "Eliminate lag" patented technology

The invention belongs to the slope stability estimation and landslide hazard monitoring and early warning technologies. A landslide forecasting method capable of utilizing underground water levels and displacement real-time monitoring includes the following steps: (1) landslide preliminary reconnaissance and monitoring point selection; (2) monitoring arrangement and installation of equipment; (3) monitoring the landslide displacement and the underground water levels in real time and processing real-time monitoring data; (4) statistical analysis period by unit and confirming mean-value underground water level HO and a displacement speed VO; (5) confirming underground water level loading and unloading parameters and loading and unloading quantities; (6) confirming displacement speed response parameters and displacement response quantities; (7) confirming the landslide displacement speed and underground water level loading and unloading response ratio parameters and numbers; (8) applying the underground water levels and displacement speed loading and unloading response ratio to carrying out evaluating slope stability and monitoring and early warning. According to the landslide forecasting method capable of utilizing the underground water levels and the displacement real-time monitoring, produced erroneous judgement or mistake judgement that landslide physics mechanical parameters, boundary conditions and the like can not be confirmed difficultly and accurately by the transitional ultimate equilibrium mechanics appraisal method can be overcome effectively.

The invention provides a product processing and delivery informationized management system model based on an internet plus technology. The model based on the construction method comprises a customer interaction unit module, a business (production and delivery) performance unit module and a customer opinion feedback unit module. The three unit modules are integrated in a whole management system. A raw material purchasing and processing and delivery plan can be automatically generated, and whole-process monitoring and early warning of all the key business nodes can be realized so that redundant inventory in the links can be greatly reduced and occupation of funds can be reduced; meanwhile, rapid chain response to abnormal business can be realized, artificial lag and error in information transmission of each link can be eliminated, multiple aspects of problems that a conventional supply chain is high in inventory, low in efficiency and slow in information transmission and lacks sharing can be solved, supply guarantee capacity of steel for the automobile enterprises can be enhanced and efficiency of the supply chain can be greatly enhanced.

The invention provides a water drive development oil reservoir well pattern injection-production relation determination method. The method comprises the steps of a first step of determining injection rate sample data of injecting wells and output sample data of producing wells or a producing well set according to production data of a water injection well in an oilfield and an oil producing well; a second step of performing filtering processing on the injection rate sample data of the injecting wells and the output sample data of the producing wells or the producing well set respectively to determine output responses of the producing wells or the producing well set corresponding to the step change of injection rates of the injecting wells; a third step of determining the injection-production relation of each injecting well and the corresponding producing well or the producing well set according to the output responses of the producing wells or the producing well set corresponding to the step change of the injection rates of the injecting wells. According to the water drive development oil reservoir well pattern injection-production relation determination method, the injection-production relations of water drive development oil reservoirs are estimated according to the injection rates of the injecting wells and the output data of the producing wells, the efficiency is improved, and the problem of the response lag of the producing wells caused by the factors of well spacing and permeability and the like is eliminated.

The invention discloses a hybrid power bus driving condition forecasting method based on an internet of vehicles, and belongs to the technical field of modern transportation. The hybrid power bus driving condition forecasting method is characterized by including steps that real-time vehicle position information and running data are matched and stored; the position information of a vehicle is transmitted in real time, the position information of vehicles around the vehicle is received, and front vehicles which run in the same direction and on the same road with the vehicle and are positioned in front of the vehicle by certain distances are selected; the front vehicles separated from the vehicle within a certain distance transmit historical data to the vehicle; forecasting weights of driving parameters of the front vehicles to the driving condition of the vehicle are determined according to the distances between the front vehicles and the vehicle, and forecast characteristic parameters of the driving condition of the vehicle are computed according to the forecasting weights and characteristic parameters of the front vehicles; the driving condition within a certain distance in front of the vehicle is identified and forecast according to the forecast characteristic parameters of the driving condition of the vehicle and a fuzzy identification model; and control parameters of the vehicle are adjusted by an HCU (hybrid control unit) according to a forecast result. The hybrid power bus driving condition forecasting method has the advantages that lagging of a traditional method is eliminated, forecast accuracy is improved, and accordingly fuel economy and emission performance of the vehicle are improved.

Embodiments of the invention relate to a permanent magnet synchronous motor control method and device based on an angular displacement time-delay-free observer, and aims to improve the position loop response speed of a control system while the angular displacement feedback lag delay generated in a control system angular displacement sampling calculation process is eliminated. According to the angular displacement observation method, an angular displacement observation model is established according to a motion equation of the permanent magnet synchronous motor, and a time-delay-free angular displacement feedback signal is obtained, so that the angular displacement feedback speed of the control system is further improved, and the response capability of the control system is improved.

The invention discloses a solar heat collecting device, comprising at least one heat collecting module, wherein each heat collecting module comprises a hollow container with an inlet and an outlet, a flow controller is arranged between the hollow container and an inlet main pipe and/or an outlet main pipe; each heat collecting module also comprises at least one temperature sensor and/or a light intensity sensor which is in communication connection with a control system and is used for measuring the temperature and/or illuminated light intensity value of the hollow container; and the control system comprises a feed-forward control unit which generates feed-forward regulating signals for regulating each flow controller after analyzing and calculating according to the temperature and/or light intensity value of each hollow container, thereby changing the quantity and/or rate of flow of a heat-absorbing working medium flowing into the corresponding hollow container, and enabling the heat-absorbing working medium at the outlet of each heat collecting module to reach the preset pressure value and temperature value. The solar heat collecting device disclosed by the invention ensures thatthe pressure and temperature of the heat-absorbing working medium at the outlet of each heat collecting module are uniform, control signal lag is eliminated, and the generating efficiency is improved.

The invention provides a webcasting method and a system. According to the invention, the method is performed in this way. Through a main segmenting server deployed at a CDN node and upon obtaining the webcasting requirement transmitted from the CDN node, the method executes the segmentation and distribution of live streaming and at the same time, synchronizes and deploys the sequence numbers of the segmentations into the sequence number storage base in the backup segmenting server deployed at the CDN node. When the backup segmenting server monitors an outage in the main segmenting server, the backup segmenting server executes the segmentation and distribution of live streaming based on the latest sequence numbers contained in its sequence number storage base. This function realizes the smooth switch between the main segmenting server and the backup segmenting server deployed at the same CDN node as well as the synchronization of sequence numbers between the two. As a result, a player is capable of obtaining segmentation of live streaming next after the current segmentation, therefore ensuring a smooth playing process.

The invention discloses a visual tensile testing system, which belongs to the field of mechanical analysis and test on metallic materials. The visual tensile testing system comprises a loading mechanism, a control mechanism, a signal acquisition and measurement mechanism, a visual acquisition mechanism and a data processing mechanism. The visual tensile testing system is characterized in that: the loading mechanism is mechanically connected to the interior of a host frame of a tester by a clamp and a clamping block; the control mechanism is arranged in a host base frame of the tester by a card; the signal acquisition and measurement mechanism is arranged in a slot of a host control card by the card; the visual acquisition mechanism consists of a CCD image acquisition system, an acquisition card, image analysis processing software, an automatic scaling frame and a communication unit; the data processing mechanism comprises a computer and an industrial personal computer; and the industrial personal computer is connected with a host control mechanism by a standard RS232 communication line. In the visual tensile testing system, the tester is utilized to perform dynamic loading on a tensile test specimen, the visual acquisition system acquires the deformation of the test specimen in a scale distance, a strength value channel acquires a strength value, a displacement channel acquires displacement, and the data processing system finishes data processing and performs analysis on tensile mechanical performance to obtain accurate and complete results.

The present invention relates to real-time monitoring method of random loss rate of combine. Feeding sensor, seed collecting amount sensor, seed loss sensor and grain moisture sensor are used simultaneously the acquire loss rate related signals, the signals are regulated, A/D converted and transmitted to computer for processing and analysis, and the results are fed via interface circuit to display and alarm device for the display and alarm of feeding amount, straw/grain ratio, grain moisture, separation loss rate, sorting loss rate and total loss rate. The present invention can measure the random loss rate and monitor the main factors to affect the loss rate and thus the operation state of the combine, so as to ensure the high operation quality of the combine.

The invention discloses a user browsing behavior based personalized recommendation method and apparatus. The recommendation method comprises: obtaining browsing history of a user; analyzing the interests and demands of the user according to each keyword in the browsing behavior history of the user, and realizing dynamic update of user interest and demand through a self-detection function of a keyword counter; and creating a list of recommendation content based on user browsing behaviors, and pushing the recommendation content to the user in a non-disturbing manner through an email. Therefore, the personalized content can be recommended according to the user browsing behaviors.

Belonging to the technical field of hydrometallurgical equipment, the invention relates to an acid adding device with an accurate and automatic pH value control function. The device comprises an acid solution storage tank (2), an acid solution distributor (10) and an acid solution control system. The acid solution distributor (10) is installed inside a reaction container (5). The acid solution storage tank (2) is arranged at a position higher than the acid solution distributor (10), and is in connection with the acid solution distributor (10) through a hand stop valve (4), an electric butterfly valve (6), an infusion tube (7) and a movable sleeve (8) in order. By employing an advanced on-line real time control technology, the device provided in the invention generates no acid fog while adding a high concentration acid solution, and has the advantages of high pH value control precision, low labor intensity, simple structure and reliable operation.

Systems are provided for EGR mass and air mass estimation during steady state and transient operations. By utilizing a combination sensor comprising of a manifold absolute pressure sensing element and a differential pressure sensing element sharing a common pressure chamber with connections to the intake manifold, errors in EGR mass estimation may be reduced.

The invention discloses a battery pack thermal management method and device, a storage medium and an electronic device. The method comprises the following steps of acquiring the current temperature ofa battery pack and the working state information of the battery pack; determining the maximum working power information of the battery pack according to the current temperature and the working stateinformation; inputting the maximum working power information, the current temperature and the working state information into a battery model assembly to obtain the heating temperature of the battery pack; judging whether the sum value of the heating temperature and the current temperature is smaller than a preset first temperature threshold value or not; and if the sum value of the heating temperature and the current temperature is smaller than the preset first temperature threshold value, determining the energy required for heating the battery pack according to the heating temperature, and starting the heating assembly, so that the heating assembly heats the battery pack according to the energy required for heating. According to the technical scheme, the heating temperature of the internal resistance is considered, and the obtained required heating or cooling energy is more accurate, so that the energy is saved.

The drive control device of the stepping motor of the present invention feedback-controls the stepping motor according to the coded signal output by the encoder, and is characterized in that it is provided with: a counter for the number of instructions, through which the number of driving pulses given to the stepping motor Counting is performed to obtain a count value of the number of instructions; a signal counter is used to obtain a signal count value by counting the number of pulses of the encoded signal; During the specified action, when the hysteresis state occurs where the count value of the instruction count is inconsistent with the count value of the signal × C (C is a predetermined positive constant), the stepping motor is operated in a specific mode of operation. The driven system is driven down, and the hysteresis of the driven system is eliminated.

The invention relates to a double-drive device for a cutting robot and a control method thereof. The double-drive device comprises a right pedestal guide rail, a left pedestal guide rail, a right cross beam bracket, a left cross beam bracket, a cross beam and a PLC control unit, wherein the left and right cross beam brackets are provided with left and right servo motors respectively; the PLC control unit is electrically connected with the left and right servo motors respectively; encoder units on the left and right servo motors are electrically connected with the PLC control unit; the encoder units on the left and right servo motors transmit current coded disc values to the PLC control unit and compare the coded disc values; the PLC control unit is provided with an alarm; and when the difference value is more than or equal to a threshold pre-stored in the PLC control unit, the alarm sends an alarm message to pause the work of the left and right servo motors. The device and the method radically eliminate the lag due to movement of the rail on one side by keeping the two servo motors in synchronous movement so as to eliminate the oscillation. The alarm on the double-drive device can alarm for positional deviation of the two servo motors.

The invention discloses a method for generating dynamic data of a dynamic seat based on video processing. The method comprises the following steps of identifying an image of a film video, and selecting a plurality of feature points of any feature objects on the image as required; tracking the position change of all the feature points through a video processing algorithm by utilizing a computer; calculating and obtaining a movement parameter and a movement trail of a virtual camera through video processing algorithm according to the position change of the feature points; calculating and obtaining the practical movement trails and movement parameters of the feature objects through the video processing algorithm according to the movement parameter and the move trail of the virtual camera; generating the dynamic data of the dynamic seat according to the practical movement trails and the movement parameters of the feature objects. By means of the method for generating dynamic data of the dynamic seat based on video processing, automatic generation of the dynamic data is almost achieved, generation efficiency of the dynamic data is greatly improved, accuracy of the dynamic data obtained through the method is obviously improved, and the method can eliminate the hysteretic property of the dynamic data.

The invention discloses an assisting power control device and method of an electro-hydraulic composite steering system. Assisting power provided by the electro-hydraulic composite steering system is supplied by an electric assisting power module and an electric hydraulic assisting power module. The assisting power control device obtains driver ideal steering wheel torque by the adoption of a comprehensive road feeling intensity evaluation method combined with a steering wheel angle gradient and torque and according to a vehicle steering wheel angle, a torque signal, a vehicle speed signal anda vehicle lateral acceleration signal, the characteristic that an electric assisting power response is made accurately and quickly is used, the electric assisting power module provides an extra compensation moment for tracking, the problem existing in electro-hydraulic composite system steering road feeling consistency is solved, and the driver ideal steering road feeling requirement is met.