617results about How to "Accurate time" patented technology

The invention discloses a method and a device for controlling new fan filter screen use time as well as a new fan system. The method comprises the following steps: the air pollution degree of a new fan use location in the current time interval is acquired; the conversion factor of the new fan use time is acquired according to the air pollution degree; the conversion running time of the new fan in the current time interval is calculated according to the conversion factor; sum of the conversion running time of the new fan in the current time interval and the conversion already running time of the new fan is obtained, and the total conversion running time of the new fan is acquired; and when the total conversion running time is larger than or equal to filter screen replacement time, a new fan filter screen replacement alarm is given. Calculation of the filter screen use time is combined with the specific use environment of the new fan, the time is accurately calculated, waste caused by early replacement of the filter screen under good air quality condition is avoided, and the problem that use is influenced by poor air filter effect of the new fan due to the fact that the filter screen is not replaced in time in poor use environment is solved.

The invention relates to movable quick water automatic monitoring system. Particularly of the movable water quality inspection technique. It comprises the sampling section carried inside the boat with water pump and water tank, water intake tube connected with output end of the water jet aspirator on one of the side wall of the water tank, water outlet on the other side wall, water running out of the outlet for water quality inspection, exhaust pipe at the bottom of the water tank, inspection part with water quality inspector and GPS receiver, terminal settlement part with data collecting card for receiving water quality information of the water quality inspector, and working condition machine that transmits the water quality information and geological information to the telemanagement center through GPRS. It has quick, accurate feature for acquiring time and space location water quality data, quickly finding out the abnormal change of the water quality, with far reaching significance for big area water surface water quality monitoring.

The present invention relates to a method for estimating a distance between nodes by using a round trip time (RTT) of a packet based on a CSMA / CA protocol in wireless sensor networks and a system thereof. The present invention provides a method for estimating a distance between nodes in wireless sensor networks that includes (a) measuring a transmission time of a transmission signal transmitted to the other node and a reception time of a reception signal received from the other node in response the transmission signal, and receiving a reception time of the transmission signal through the reception signal from the other node and a transmission time of the reception signal through a signal received after the reception signal from the other node; and (b) estimating a distance to the other node by using the transmission / reception time of all signals acquired in step (a). According to the present invention, it is possible to accurately estimate the distance between two nodes and as a result, it is possible to accurately identify positions of nodes that are deployed in a sensor field.

The invention discloses a method and corresponding device for taming crystal oscillation frequency of a time-keeping device, which comprises the following steps of: step 1, acquiring the standard time pulse A that is located and output by a navigation satellite; step 2, acquiring the standard time pulse B output by device crystal oscillation fractional frequency; step 3, measuring the clock difference between the standard time pulse A and the standard time pulse B; and step 4, if clock difference exists between A and B, adjusting the crystal oscillation frequency of the device to make the clock difference be in the allowed scope. For the time-keeping equipment with pressure control and temperature compensating crystal oscillation or pressure control crystal oscillation, the frequency deviation of the corrected crystal oscillation can be detected in real time by the method provided by the invention to eliminate the time-keeping error caused by crystal oscillation frequency deviation and avoid accumulation of error. Therefore, the invention is suitable for various satellite navigation systems, such as GPS, Beidou first generation navigation satellite, Beidou second generation navigation satellite, GLONASS, GALILEO and other satellite navigation systems.

The invention relates to a time measurement system, which comprises a start signal fine time measurement unit, a timing signal fine time measurement unit, a rough time measurement unit and a time calculation unit, wherein the start signal fine time measurement unit comprises a delay chain, a plurality of registers and a data converter; one end of the delay chain receives a start signal; outputs of delay units receiving the start signal are sequentially changed into second levels; each register reads and stores an output value of the corresponding delay unit at the rising edge of a first clock when the start signal is input; the data converter converts the stored data into time data to acquire start signal fine time; the timing signal fine time measurement unit is used for acquiring timing signal fine time; the working theory of the timing signal fine time measurement unit is similar to that of the start signal fine time measurement unit; the rough time measurement unit is used for measuring rough time under the driving of a field programmable gate array (FPGA) clock signal; and the time calculation unit is used for subtracting the timing signal fine time from a sum of the rough time and the start signal fine time to acquire time to be measured. According to the system, the precision and the instantaneity of time measurement are improved.

The invention provides a bus arrival time estimation method and device. The method includes dividing each bus running line into a plurality of running portions, and establishing corresponded artificial neural network models respectively; training the running portions to acquire corresponded parameter values of the corresponded artificial neural network models; determining all target running portions between the current bus position and a target station, acquiring current values of the current influence factors corresponding to each target running portion, inputting the corresponded artificial neural network models, acquiring output values of the artificial neural network models corresponded to the target running portions, and acquiring times for the bus arriving the target station according to the output values. The device comprises a dividing module, a model establishing module, a first artificial neural network model processing module, a current state processing module, a second artificial neural network model processing module and a calculating module. By the aid of the method and device, the bus arrival time can be calculated more accurately.

The invention discloses a method for simulating faults of a power transformer. According to a current mode and method for simulating the internal faults of the transformer, a returned transformer is commonly utilized to conduct fault simulation tests, or the fault stimulation tests are directly conducted in oil in the transformer, workload is large, fault modules need to be frequently replaced, and the simulation effect is poor. According to the method for simulating the faults of the power transformer, an electric power simulation transformer structure and a transformer fault model are used as the foundation, generation, disappearance and intensifying of transformer partial discharge faults and winding deformation faults are directly controlled outside a transformer body through an external regulation control method, and regulation can be safely conducted in the boosting process. By the adoption of the method for simulating the faults of the power transformer, the trouble of replacing the fault model in the fault simulating process is avoided, generation time and intensity of the faults in the boosting process can be conveniently regulated and controlled, and the method is accurate and efficient.

The invention discloses a hydrologic data monitoring system, which comprises a monitoring center system, one or more wireless gateways, one or more wireless hydrologic data acquisition terminals and one or more sensors for measuring hydrologic data, wherein each wireless hydrologic data acquisition terminal is connected with the one or more sensors, and used for receiving the hydrologic data from the sensor which is connected with the wireless hydrologic data acquisition terminal, converting the hydrologic data and then sending the hydrologic data to each wireless gateway; and each wireless gateway is used for receiving the hydrologic data from the one or more wireless hydrologic data acquisition terminals in a coverage range of the wireless gateway, aggregating the hydrologic data and then sending the hydrologic data to the monitoring center system. By adoption of the hydrologic data monitoring system, low-cost and low-complexity sensor data acquisition, transmission and monitoring associated with hydrologic monitoring can be realized.

The invention provides a water quality monitoring system and platform based on Internet of things, and relates to the field of environment protection. The system comprises a cloud server, a client anda plurality of floating bodies, wherein the client and the floating bodies are connected with the cloud server; each floating body comprises a water quality detecting device and a terminal processingdevice which are connected; the water quality detecting device comprises a water quality detecting instrument and an automatic depthkeeping sampler which are connected; the terminal processing devicecomprises a main controller, a data collecting card, a positioning module, a storage module and a communication module; wherein the data collecting card, the positioning module, the storage module and the communication module are connected with the main controller; the data collecting card receives water quality information of a sampling site; the positioning module obtains position information of the sampling site; the main controller receives the water quality information and the position information to generate standard data; the storage module backs up the standard data; the communicationmodule transmits the standard data to the cloud server; the cloud server receives the standard data for storage; the client accesses the cloud server. The problems of low monitoring efficiency and narrow application range in the prior art are relieved; the monitoring efficiency is improved; the application range is wide.

The invention belongs to the technical field of solar energy application, in particular relates to an automatic sun tracking system of a solar collector. The system consists of a motor which drives the solar collector to track the sun, a mechanical transmission mechanism and a tracking control circuit which controls the mechanical transmission mechanism to operate; the system is characterized in that a GPS receiver arranged on the solar collector and an attitude sensor are used for outputting the signals of the position, the orientation, and the like, of the collector to a microprocessor; the microprocessor outputs control signals to the motor, so as to control the mechanical transmission mechanism to drive the solar collector to face the sun directly after working out the difference value of the orientation of the collector and the position of the sun. The system can realize the accurate all-round sun tracking in real time by adopting the GPS location finding technique without the influence of weather and environment, and is suitable for the solar collector which has the fixed position on the earth or the solar collector which is arranged on the moving car body and a transocean vessel to track the sun.

The embodiment of the invention provides a web page running efficiency monitoring method and device. The method comprises the following steps: by responding to a request for accessing a web page by a user through a browser, acquiring a rendering start time point of the web page, wherein the web page is formed by a UI (User Interface) component corresponding to a specific business operation function; when the user clicks on the web page and triggers a trigger event of the UI component, acquiring a processing start timestamp and a processing end timestamp of the trigger event of the clicked UI component; when processing on the trigger event of the UI component clicked by the user is ended and the web page is returned to, acquiring a rendering end time point of the web page; according to the acquired rendering start time point and the rendering end time point of the web page, calculating rendering response time in real time; according to the acquired processing start timestamp and processing end timestamp of the trigger event of the UI component, calculating response time of business operation corresponding to the UI component in real time.

The present invention discloses a prediction method for a corrosion residual life of transmission line towers at an industrial area. The prediction method provided by the invention comprises the following steps: 1) measuring an average thickness of a zinc coating of materials of a predicted tower; 2) measuring a minimum residual thickness of the serious material corrosion area of the predicted tower, and obtaining a maximum residual thickness of the materials of the predicted tower through an original thickness of the materials of the predicted tower subtracting the minimum residual thickness of the serious material corrosion area of the predicted tower; 3) determining an iron corrosion rate and a zinc corrosion rate of the industrial area at which the predicted tower is located; 4) obtaining a maximum corrosion allowance depth of the materials of the industrial area at which the predicted tower is located; and 5) calculating a corrosion residual safe life of the predicted tower. According to the invention, corrosion residual lives of transmission line towers at an industrial area may be quickly and accurately predicted, so that maintenance measures may be timely adopted and accidents such as lost connection, power failure and tripping operation of electric transmission lines may be prevented. The prediction method for a corrosion residual life of transmission line towers at an industrial area is scientific and reasonable, and has fast time and high accuracy.

The invention discloses a dynamic reactive power compensation device response time test method. The method comprises a load compensation response time test step, a step response time test step and a voltage transient drop response time test step; instantaneous reactive power squiggles under all states are calculated by an instantaneous reactive power calculation formula of a three-phase device, then all time points on the squiggles are determined, and load compensation response time, step response time and voltage transient drop response time are calculated. The response time test method has the characteristics of simple calculation and accurate results, the step response time and stabilization time can be accurately tested, and the existing response time concept misunderstanding is avoided.

The invention provides a system and a method for wireless-sensor communication. The method comprises the steps of acquiring data according to a preset data acquisition cycle, wirelessly receiving current time information and specified data-sending time slots, updating local time according to the current time information and sending the acquired data within the specified data-sending time slots, wherein the data-sending time slots are concrete time segments within a preset data-sending cycle. As a concentrator uniformly allocates time, wireless sensors do not need to comprise extra RTC chips, so that the cost of the wireless sensors is saved. In addition, as the concentrator allocates the concrete data-sending time slots to each wireless sensor, collision caused by a plurality of wireless sensors simultaneously sending data is avoided, and the capacity of the wireless-sensor communication system can be greatly improved.

The invention discloses a small leakage detection system for a liquid pipeline and relates to the technical fields of tests not included in other classes, acoustic wave measurement and pipeline systems. On the premise of not changing technological processes of current pipelines, a leakage detection ball is sent out by a pipe cleaner ball sending device and flows along with a medium in the pipeline; meanwhile, acoustic signals inside the pipeline and state information of the leakage detection ball are acquired, stored and tagged with time labels; after the leakage detection ball is collected back from a ball collecting bucket, the small leakage detection system is connected with an upper computer, so that the acoustic information stored in the pipeline and the state information of the leakage detection ball are obtained; the obtained acoustic information is directly displayed in an oscillograph on the upper computer; except a ball sending bucket and the ball collecting bucket, if an acoustic amplitude is higher than that of noise in the pipeline, the corresponding time is judged to be the leakage point and recorded; according to the recorded time of the leakage point, the state information of the leakage detection ball is subjected to quadratic integral so as to obtain displacement of the leakage detection ball relative to the ball sending bucket, namely the leakage position. The small leakage detection system for the liquid pipeline can detect small and even tiny leakages and is high in sensitivity.

The invention discloses a concrete pavement casting vibration device and a construction method thereof. The vibration device comprises a truss, vibration rods and a control box, wherein shafts are respectively mounted at the two sides of the truss; a cross bar is movably hinged to the shafts on the truss through two connecting rods; 5-10 vibration rods are provided, and are uniformly distributed on the cross bar; each vibration rod is controlled by a motor to vibrate; the motors are connected and controlled through the control box; the tail ends of the vibration rods are connected with the cross bar through fixing devices distributed on one horizontal line; the front ends of adjacent two vibration rods are staggered at the two sides of the truss in tandem, and are provided with walking flattening rollers having chain wheels; and rails are paved below the walking flattening rollers. As the vibration rods are staggered, concrete in each place is vibrated; and the walking speed and the vibration time are accurately controlled, so that the sufficient vibration is realized, and the construction progress can be guaranteed.

The invention relates to a traffic accident rate prediction system based on on-line variational Bayesian support vector regression, which comprises a data preprocessing module, an online variational Bayesian support vector regression model building module, an online variational bayesian support vector regression model training module, and an online variational bayesian support vector regression model prediction module. This method effectively solves the problem that the traditional support vector regression model predicts the speed of traffic accident rate is slow, the prediction result is inaccurate, and it is difficult to solve the problem on line and show its practical value.

The invention is applicable to the field of mobile communication, which provides a refresh method for time of a mobile terminal system, a mobile terminal and a system, wherein, the method comprises the steps that: place information of the position of a mobile terminal is sent; according to the place information of the position of the mobile terminal, the exact time of the place in which the mobile terminal positions is generated; the system time of the mobile terminal is refreshed to be the exact time. The method does not need to know the exact time of the position of the user, and also does not need to correct the system time of the mobile terminal in a manual way and can lead the mobile terminal carried by the user to obtain the exact time in any place at any time.

The invention discloses a trajectory chart display device, a trajectory chart display device method and a monitor terminal, and belongs to the location monitoring technical field. The trajectory chart display device comprises an information acquisition device, a storage unit, a time shaft display unit and a map position display component, wherein the information acquisition device is suitable for acquiring a position information list of a personal positioning device in a period of time, the storage unit is suitable for storing the position information list, the time shaft display unit is suitable for displaying a time shaft in a first area of a screen, and the map position display component is suitable for acquiring information of each position from the position information list, sending geographic coordinates in the information of each position to a map processing component, and indicating screen coordinates corresponding to all the geographic coordinates, which are returned by the map processing component after the map processing component displays a map in a second area of the screen, and thereby displays an icon in each screen coordinate position on the map so as to show a movement trajectory of the personal positioning device. According to the trajectory chart display device, the trajectory chart display device method and the monitor terminal, information displayed on the monitor terminal is sufficient, and a user can conveniently confirm positions of the personal positioning device at random time.

The invention provides an air conditioner silent mode control device and method and an air conditioner. The air conditioner silent mode control device comprises a time acquisition unit, a storage unit and an air conditioner parameter determination unit. The time acquisition unit acquires time information from the Internet. The storage unit is used for storing first corresponding relations between each of at least two time periods and air conditioner operating parameters. The air conditioner parameter determination unit determines air conditioner operating parameters according to the time information acquired by the time acquisition unit and the first corresponding relations. According to the technical scheme, the accurate time can be obtained through the Internet, and meanwhile, the air conditioner silent mode is controlled by combining the different time periods.

The application discloses a time synchronization method, a time synchronization device and a time synchronization system. The method comprises the following steps: sending a time synchronization request to target equipment, receiving a response data package returned by the target equipment and containing a transmitting timestamp, determining transmission time spent from sending the time synchronization request to receiving the data package, determining a transmission time threshold value according to a preset time error scope and expected probability falling into the time error scope, and judging whether the transmission time is shorter than the transmission time threshold value, and if the transmission time is shorter than the transmission time threshold value, correcting the time of the synchronization equipment according to the transmission time and the sending timestamp of the response data package. The application records the influence of transmission time, so that the finally corrected time of the synchronization equipment is more accurate.

The invention discloses a method for predicting sheet forming fractures based on a damage fracture standard numerical value. The method includes the steps of obtaining the stress state distribution of a metal sheet cylindrical piece in the stamping process according to the thermodynamics irreversible law, obtaining a stress balance differential equation of the metal sheet cylindrical piece in the stamping process according to the stress state distribution, calculating the change rate, occurring when the metal sheet cylindrical piece is damaged, of the area of a small unit of the metal sheet cylindrical piece in the stamping process according to the continuum damage mechanics theory, obtaining the damage to the metal sheet cylindrical piece according to the change rate, calculating the relation between the damage and the strain of the metal sheet cylindrical piece, and finally deriving the relation between the damage value and the true stress, true strain and hydraulic stress of the metal sheet cylindrical piece under the unidimensional scale in the whole stamping process. By means of the method, the technical problem that when fractures during sheet forming are predicted through an existing numerical value method, errors are large can be solved.

A time synchronizing method between nodes in WCDMA system includes setting up time synchronization parameters, starting SNTP service on time server, actively transmitting request information from wireless network controller or wireless network access node to the time server, choosing and judging the SNTP service mode, regularly broadcasting time information by time server for broadcast mode or regularly requesting time information from client to time server for point-to-point mode to obtain time information, and removing transmission delay to complete time synchronization.

A self-vibrating type micro-quake monitoring system comprises a ground central station, a control host computer, network switches, monitoring substations, vibration pickups and a self-vibrating source, wherein the ground central station is used for receiving data and storing the data in real time; the control host computer is used for presetting and modifying relevant parameters of monitoring indexes, receiving the data and preprocessing and analyzing the data; the network switches are used for transmitting the data in the well and above the well; the monitoring substations are used for acquiring and judging input signals, performing analog-digital conversion to the signals, amplifying signals, eliminating signal superposition and automatically recognizing the signals meeting preset parameters; the vibration pickups are used for picking up a natural cracking signal of coal and rock mass and a signal transmitted from the self-vibrating source and transmitting the signals to the monitoring substations; the self-vibrating source is used for generating an artificial P wave, correcting speed of the P wave generated by the natural cracking signal and correspondingly valuing the speeds of the P waves of the vibration pickups distributed in different areas. The self-vibration type micro-quake monitoring system is simple in structure, easy to operate, high in quake data computation precision and convenient for monitoring in large-range, long-term and dangerous conditions.

The invention discloses a time-frequency synchronizing method for a multi-input and multi-output orthogonal frequency-division multiplexing system. The method includes the steps: (1) generating pilot frequency data; (2) generating load data; (3) forming sending data; (4) acquiring delay correlation data; (5) acquiring filtering data; (6) acquiring filtering data variation tendency; (7) acquiring a time synchronizing position; (8) correcting fractional frequency offset; and (9) correcting integer frequency offset. By the method, the time synchronizing position is acquired only by using delay correlation for one time, so that resource consumption and technological implementation cost of the system are reduced; the time synchronizing position and the fractional frequency offset are acquired simultaneously by using delay correlation for one time so that computing speed of the system is increased; and the time synchronizing position is acquired by using the delay correlation variation tendency so that time synchronizing precision is improved.

The invention belongs to the technical field of smoke purifying, and provides a glass-furnace-smoke integrated-denitration-desulfurization-dedusting technological device and a technology. A waste-heat boiler (2) of the glass-furnace-smoke synchronous denitration-desulfurization-dedusting technological device is internally and sequentially provided with a primary heat exchanger (7), a medium-temperature denitration reactor (8), a secondary heat exchanger (9) and a multistage heat exchanger (10) from front to back in the smoke flow direction; a low-temperature denitration-desulfurization-dedusting reacting tower (3) comprises a tower body divided into a main tower body (11) and an auxiliary tower body (12); a reducing agent evaporator (13) is arranged in a smoke inlet in one side of the main tower body (11); a low-temperature catalysis reacting bed (20) is arranged in the auxiliary tower body (12). By means of the glass-furnace-smoke integrated-denitration-desulfurization-dedusting technological device and the technology, the one-time investment cost and the occupied area are saved, and meanwhile the operating cost is reduced; and the aims of clean governance and zero release are achieved as a whole.

The invention discloses a method for measuring the content of magnesium oxide in iron ores, relates to a detection method, and particularly relates to a method for measuring the content of magnesium oxide in depositing iron rocks and ores. The method includes adopting sodium hydroxide as a fusing agent to melt an iron ore sample in a high-temperature furnace and leading magnesium ions to enter solution after acidification by aid of nitric acid; and adding benzilic acid, ethylene glycol tetraacetic acid (EGTA) solution and triethanolamine to mask metal ions of titanium, iron, aluminum, alkaline earth and the like, generating magnesium hydroxide deposit in alkaline solution with the pH (potential of hydrogen) larger than 12, depositing to generate hydrochloric acid solute after filtering, using acid chrome blue K and naphthol green B as indicators in solution with the pH of 10, adopting ethylene diamine tetraacetic acid (EDTA) standard solution for titration, and obtaining the content of the magnesium oxide. The method has the advantages of simplicity, convenience, speediness, low cost, fine reproducibility and the like.

The invention discloses an automatic drug dispensing system and method for ampules, wherein the automatic drug dispensing system for ampules comprises: a frame and a clamping component used to clamp a body of an ampule and slidably disposed on the frame; a cutting component positioned above the clamping component to cut a neck of the ampule; a sterilizing component for spraying a sterilizing solution to the cut part of the ampule, i.e., the neck, and a blowing component; a breaking component that impacts on the ampule through a push bar and breaks the head of the ampule; a solution injection component that includes a support member, a suction chamber, a first guide tube, a second guide tube, an infusion bag needle, an ampule needle, a first clamping member, a second clamping member and a recycling component. The automatic drug dispensing system for ampules is high in automation degree, compact and simple in structure, small in size, convenient to operate and maintain and low in cost; the drug dispensing method enables automatic dispensing in the steps for ampules, labor intensity for manual drug dispensing is greatly relieved, and the method is simple to perform and high in intelligence level and enables greatly improved dispensing efficiency.

The invention discloses a time synchronization method and a time synchronization system based on an NTP network, and relates to a time synchronization method and a time synchronization system. Currently network communication time is compensated through a network, so as to reduce error during timing, but a clock can not be accurate to seconds. The method comprises the following steps: a main station sends a request for inquiring an accurate clock to a terminal; the terminal responds to the request for inquiring an accurate clock of the main station; the main station records the time for receiving the request response and repeats the previous step; the main station computes the time of network transfer from the main station to the terminal, and sends a request for modifying the time deviation to the terminal; the terminal conforms the request and modifies the time; the main station inquires the terminal time; the terminal returns the terminal time to the main station; the main station conforms the correctness of the terminal time, and then sends a timing request to the terminal; the terminal performs time synchronization on a primary meter according to the timing request of the main station; the terminal conforms the time synchronization. The technical scheme improves the time synchronization precision, obtains the accurate occurrence time of instantaneous data, such as load, voltage, current and the like, and improves the correctness of time-of-use electricity price computation.

The present invention is one electronic timer and time correcting equipment, system and method. The electronic timer includes simple and low-power consumption error correcting circuit for raising time accuracy. The error correcting data are calculated by outer equipment based on the data the electronic timer produces, the stored data and outer standard time data, and is stored in the memory of the electronic timer. Thus, the microprocessor of the electronic timer can correct time without needing great amount of calculation.