15results about How to "Improve metering accuracy" patented technology

The invention belongs to the technical field of electric power measurement, and discloses a calibration method and system of an intelligent measurement switch and a multi-switch synchronous measurement method, and the method comprises the steps: obtaining voltage and current waveform data of the intelligent measurement switch under a nonlinear load condition, and extracting a frequency spectrum feature matrix of the voltage and current waveform data; constructing an amplitude-phase coupling error model representing a nonlinear incidence relation between amplitude fluctuation and phase deviation, inputting the spectrum characteristic matrix into the amplitude-phase coupling error model, and calculating an amplitude-phase coupling error vector; performing vector decomposition on the amplitude-phase coupling error vector, and separating out an in-phase component error and an orthogonal component error; and generating a calibration compensation coefficient according to the in-phase component error and the orthogonal component error, and performing vector calibration on the intelligent measurement switch, thereby improving the calibration precision of the intelligent measurement switch.

This utility model relates to the field of urine collection bag technology and discloses a urine collection bag for bladder irrigation in urological patients. It includes a lifting arm and a urine collection bag. A hook is fixedly connected to the middle of the upper surface of the lifting arm, and a warning light is installed in the middle of one side of the lifting arm. A power supply is installed inside the lifting arm. Slides are formed on both sides of the lifting arm. A conductive block is fixedly connected to one side of the bottom wall of the slide, and a spring is fixedly connected to the other side of the bottom wall of the slide. An inlet pipe is fixedly connected to one side of the upper surface of the urine collection bag, and a drain pipe is fixedly connected to the middle of the lower surface of the urine collection bag. This urine collection bag for bladder irrigation, through the design of an observation window and built-in scale lines, reduces the interference of bag deformation and light refraction on readings. Nursing staff can intuitively and accurately read the volume of irrigation waste fluid, ensuring accurate recording of intake and output balance, and providing reliable data support for assessing the patient's bladder irrigation effect, bleeding, and renal function recovery.

A broadband voltage transformer error compensation method is proposed. First, a broadband test platform is constructed using a signal generator, power amplifier, standard voltage transformer, and high-bandwidth data acquisition system. The ratio and phase errors of the transformer at multiple frequency points are acquired through primary-side excitation and secondary-side synchronous acquisition. Based on the slope, first derivative, and second derivative characteristics of the error curve, the entire frequency band is adaptively divided into segments. Within each segment, multiple candidate models are fitted using a polynomial or exponential-linear combination model. The optimal model is selected based on the coefficient of determination, mean absolute error, and root mean square error. Ratio and phase error compensators are constructed based on the fitting functions of each segment, and error compensation is achieved using a feedforward approach. This method can significantly reduce amplitude and phase errors over a wide frequency range, improving the dynamic measurement accuracy of the voltage transformer.

The application provides a method for online analysis of organic phosphorus and inorganic phosphorus in seawater, comprising: online sampling of seawater samples, establishment of a single-component digestion reaction kinetics analysis model of organic phosphorus and inorganic phosphorus at a characteristic wavelength; construction of a binary analysis model of total phosphorus at t1 or t2 time based on iterative addition of spectral absorbance; establishment of a water body background correction model to calculate the content of phosphate in the water body; coupling of the water body background analysis model to establish a binary analysis correction model of digestible total phosphorus; and continuous measurement of dissolved phosphate, organic phosphorus and digestible inorganic phosphorus in the water body based on the background correction model and the binary analysis correction model, so as to realize online continuous analysis of organic phosphorus, digestible inorganic phosphorus and phosphate components.

The utility model discloses a kind of quantitative feeders, including material barrel, the top of material barrel is provided with top cover, installation port is provided on the top cover;Blanking funnel, the blanking funnel is provided with blanking port, the blanking funnel is set in the bottom of the material barrel;Tray, the tray is set in the bottom of the material barrel, the tray is below the blanking funnel;Blanking pipe, the blanking pipe is telescopic sleeve, the upper end of blanking pipe is set in the installation port;Metering disc, the edge of metering disc is provided with multiple guide ribs, the guide rib is vertically arranged, through hole is provided on the metering disc, the through hole is connected blanking pipe;Sealing ball, the sealing ball is set in the material barrel and is configured to switch blanking port of blanking funnel. Realize the measurement accuracy of quantitative feeder is improved.

The invention discloses a voltage influence error suppression method, an electric energy meter and a storage medium. The method is applied to the electric energy meter and comprises the following steps: respectively adjusting the structure and parameters of a transformer, the structure and parameters of a manganese-copper diverter and the parameters of a metering chip; and the error variation of the electric energy meter is compensated and calibrated through the control module. From the aspect of hardware, the structure and parameters of the transformer are adjusted for an interference source, and the influence on other devices is reduced; aiming at an interfered device, the structure and parameters of the manganese-copper shunt are adjusted, so that the influence on the interfered device is reduced; parameters of the metering chip are adjusted, and relative interference is reduced. From the perspective of software, the actual error of the electric energy meter is compensated, and the voltage influence is further suppressed. By means of the method, the influence on the voltage is restrained from multiple aspects, the error change amount is stably controlled within 1% from the original standard limit value, the national standard is greatly exceeded, and the higher internal control index of an enterprise is met.

The application relates to the technical field of marine ecological disaster monitoring, and discloses a green algae area estimation method based on an unmanned aerial vehicle non-orthographic operation mode, which comprises the following steps: firstly, spectrum energy analysis is used to determine a sea state mode and to inversely calculate a basic wave height, a vertical non-uniform atmospheric extinction model is constructed to perform physical defogging; secondly, a fluid-solid coupling damping coefficient is inversely calculated based on texture entropy and glare characteristics, and a green algae microscopic equivalent mean square slope is corrected; finally, pixel-level macroscopic slant range projection, a wave shielding compensation factor and a microscopic surface area correction factor are comprehensively used, and a Sigmoid smoothing truncation weight function is combined to calculate a green algae physical total surface area. The application solves the measurement error caused by the non-uniformity of atmospheric medium, wave shielding and the absence of microscopic geometric characteristics under non-orthographic observation, and significantly improves the monitoring accuracy under complex sea conditions.

The utility model discloses a calcium carbonate auxiliary agent quantitative atomization adding device, the utility model discloses a storage agent jar is equipped with the stirring paddle in the jar, the metering conveying subassembly that the ceramic plunger metering pump that communicates with the storage agent jar is formed, the atomizer of metering conveying subassembly is connected through the anticorrosive pipeline, its inside is equipped with the spiral atomization shower nozzle, still has the compressed gas source that the gas pipe connects the atomizer through the take steady voltage valve, flowmeter. In addition, the utility model still contains the support, and the liquid level meter has in the storage agent jar lateral wall, and the one -way valve has between metering conveying subassembly and the anticorrosive pipeline, and the polytetrafluoroethylene blowdown valve is equipped in the atomizer bottom. The utility model can accurate quantitative conveying auxiliary agent and high -efficient atomization, make auxiliary agent and calcium carbonate powder even mix, promote the modification effect, simple structure, convenient operation, and the practicality is strong, has the remarkable application value in the dry -process production heavy modified calcium carbonate field.

This invention relates to an automatic vehicle weighing system based on a dynamic transportation process, belonging to the field of vehicle load detection technology. The system includes: a data acquisition unit for real-time acquisition of deformation angle data from measuring points on the vehicle's suspension system and generation of timestamps and vehicle identifiers; a data processing and communication unit for data preprocessing, local caching, obtaining vehicle location and operating conditions, and enabling local storage to resume transmission when communication is interrupted; a background service and calculation unit, where a dynamic benchmark management module automatically identifies periods of no-load, stationary, and horizontal state, stores the acquired deformation angle data as dynamic no-load benchmark values, and automatically triggers benchmark updates when the deviation between the new benchmark value and the initial benchmark value exceeds a threshold; and a load calculation module calculates the vehicle's load weight based on real-time deformation angle data and dynamic no-load benchmark values, combined with a load calculation model. This system achieves high-precision, maintenance-free dynamic measurement of the vehicle-mounted weighing system and improves its adaptive correction capability against zero-point drift.

This invention discloses a loss-in-weight scale for improving weighing accuracy; relating to the field of loss-in-weight scale technology, it includes a support frame, a tank, and a tank cover. Multiple equidistant pressure sensors are installed on the periphery of the top surface of the support frame. A quantitative transmission mechanism is provided at the lower end of the tank, and a balancing component is installed on the upper end of the tank cover. This invention significantly improves weighing accuracy through the symmetrical arrangement of pressure sensors and a stable force transmission structure. Multiple equidistant pressure sensors installed on the periphery of the top surface of the support frame are rigidly connected to the tank through a positioning plate, ensuring that the weight of the tank is evenly transmitted to each sensor, avoiding detection deviations caused by single-point force. Simultaneously, the fixing effect of the positioning plate reduces interference from tank shaking to the sensors, making the weight signal more stable. The quantitative transmission mechanism of this invention achieves stable material transport through the synergistic effect of stirring and double-headed spiral pushing. By optimizing the material diversion and guiding structure, residue inside the tank and transport deviations are reduced, further improving measurement accuracy.

The invention relates to the technical field of engineering metering, in particular to a highway subgrade receiver collaborative metering system based on a live-action three-dimensional model, and the system comprises a data collection module which is used for the data collection of multi-source equipment, so as to obtain subgrade basic data; the data preprocessing module carries out standardization processing on the roadbed basic data to obtain preprocessed data; the live-action three-dimensional model generation module generates a roadbed model through an SfM algorithm and an MVS algorithm; the metering platform performs feature extraction on the roadbed model to obtain point location engineering quantity metering data, length engineering quantity metering data and area engineering quantity metering data; and the report module is used for acquiring data of the metering platform to generate a project quantity report. According to the highway subgrade receiver collaborative metering system based on the live-action three-dimensional model, point location, linearity and area engineering quantity metering can be integrated, and the problems that a traditional metering method is low in precision and low in efficiency are solved.

The application relates to the technical field of pipeline flow metering equipment, and discloses a pipeline noise reduction rectifying device and a pipeline flow metering system. The pipeline noise reduction rectifying device comprises a shell, an air inlet arranged at the front end of the shell, and an air outlet arranged at the rear end of the shell. The shell comprises a diameter expansion part and a steady flow noise reduction part arranged in sequence from front to rear. The inner diameter of the diameter expansion part gradually increases from the air inlet to the downstream. The inner diameter of the steady flow noise reduction part is greater than that of the air inlet. A front rectifying net is arranged on one side of the steady flow noise reduction part close to the air inlet. A steady flow ball is fixedly arranged on the steady flow noise reduction part and located on the rear side of the front rectifying net. The rear end of the steady flow ball is opposite to the air outlet. The pipeline noise reduction rectifying device can perform noise reduction and rectification on the airflow in the pipeline, create a stable measurement environment for the ultrasonic flow meter on the pipeline, and indirectly improve the measurement accuracy of the flow.

The invention belongs to the field of flow metering, and particularly discloses an ultrasonic water meter metering method based on EMD decomposition denoising, which comprises the following steps of: S1, giving a value interval of temperature in an ultrasonic water meter and a value interval of intensity of external electromagnetic interference; s2, when water flow in the ultrasonic water meter moves, extracting signal features and water flow velocity, and constructing a signal sample; s3, for the combination of the value interval of each temperature and the value interval of the electromagnetic interference intensity, adding all obtained signal samples into the same set to form a sample set; s4, constructing a water flow velocity prediction model based on the deep neural network, and training the water flow velocity prediction model by using the sample set; s5, in the actual ultrasonic water meter metering process, ultrasonic water meter metering is completed. According to the method, the mapping relation among the signal characteristics, the temperature, the external electromagnetic environment and the water flow velocity after EMD denoising is established, and accurate ultrasonic water meter metering is achieved.

The utility model discloses a kind of electric wire cable length measuring devices, including measurement base, the top of measurement base is fixedly connected with portal frame, the portal frame is installed with the measurement component for cable length measurement, the top of the portal frame and the position corresponding the measurement component is installed with the limiting component for the cable to be measured limiting, the both sides of measurement base top are installed with the guide component for the cable to be measured guiding, the measurement component includes measurement shaft rotatably installed on the portal frame, metering wheel is fixedly connected on the measurement shaft, the end of the measurement shaft is installed with encoder. The utility model realizes the self-adaptive limiting clamping of different thick and thin cable and the self-adaptive adjustment of cable tension, effectively improve the accuracy and stability of cable length measurement, while having the advantages of stable structure, reliable operation etc., and has wide application prospect in electric wire cable length measurement field.

This utility model discloses a three-phase metering system for oil, gas, and water in a sand-bearing single well, comprising a flow computer, a desander, a gas-liquid separator, a water cut measuring pipe, a fluid inlet pipe, a fluid outlet pipe, and a manifold. The fluid inlet pipe is connected to a separation metering pipe, a sampling measuring pipe, and a large-diameter measuring pipe. The end of the separation metering pipe furthest from the fluid inlet pipe is connected to the gas-liquid separator. A second switching valve is installed on the separation metering pipe. A first gas phase pipeline connected to the top of the gas-liquid separator is provided, and a second two-phase flow meter is installed on the first gas phase pipeline. A first liquid phase pipeline connected to the bottom of the gas-liquid separator is provided, and a first two-phase flow meter is installed on the first liquid phase pipeline. This utility model can accurately measure the flow rates of oil, gas, and water in sand-bearing crude oil.