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 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 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 the Internet of Things, which relates to the field of environmental protection. The system includes a cloud server, a client connected to the cloud server, and a plurality of floating bodies. The floating bodies include a connected water quality detection device and a terminal processing device; The water quality detection device includes a connected water quality detector and an automatic depth-fixed sampler. The terminal processing device includes a main controller and a data acquisition card connected to the main controller, a positioning module, a storage module and a communication module; Water quality information; the positioning module obtains the location information of the sampling site, the main controller receives the water quality information and location information to generate standard data; the storage module backs up the standard data; the communication module 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 alleviated, the monitoring efficiency is improved, and the application range is wide.

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 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 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 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 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 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 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.