1312results about "Testing/calibration apparatus" patented technology

The invention provides a molten pool level online monitoring system and method, and the system comprises a data collection module, a data preprocessing module, a model training and optimizing module, an angle detection and compensation module, a nonlinear data processing module, a system testing and optimizing module, a display module, a communication module, and a control module. The online real-time monitoring of the molten pool level can be realized, the production automation level is improved, when the data acquisition module reaches a detection position, the control system triggers a signal through the coil, the camera is started to capture the images of the liquid level of the slag surface and the liquid level of the copper solution surface of the current molten pool, the online real-time monitoring function of the molten pool level is realized, and the production efficiency is improved. Compared with a traditional manual measurement or intermittent monitoring method, the method has the advantages that the detection efficiency can be greatly improved, the dependence on manual operation is reduced, and the automation level of the production process is improved.

The invention relates to the technical field of industrial process measurement, and discloses a high-precision liquid level measurement anti-interference calibration method, which comprises the following steps of: 1, synchronously acquiring a liquid level signal, a mechanical vibration signal, an electromagnetic field intensity signal and a temperature distribution signal through a multi-mode sensor array to form multi-physical field data; 2, constructing a hypergraph adjacency tensor based on the coupling relationship of the multi-physics field data, and generating a Laplacian matrix constraint; step 3, performing CP tensor decomposition with hypergraph constraint on an original signal tensor formed by the multi-physical field data, and separating a liquid level signal kernel from an interference kernel; and step 4, inputting the decomposed signal kernel characteristics and the sensor impedance parameters into a depth deterministic strategy gradient algorithm to realize hardware acceleration of a processing flow. A multi-physics field coupling relation is constructed through a hypergraph adjacency tensor and a Laplacian matrix, and the limitation of a traditional binary correlation model is broken through.

The invention belongs to the technical field of liquid level monitoring, and relates to a liquid level monitoring method and system based on a radar liquid level meter. The current temperature of the stored substance in the target storage tank is matched with the dielectric constant, whether the dielectric constant is abnormal or not is judged accordingly, the influence of the temperature on the dielectric constant of the stored substance is considered, and errors caused by temperature changes when the radar liquid level meter monitors the liquid level are avoided; whether abnormal influence is generated on the monitoring process of the radar liquid level meter or not is evaluated from multiple dimensions through the key obstacles in the target storage tank, the limitation of single parameter analysis is broken through, measurement errors caused by obstacle abnormity can be reduced, and the stability of liquid level monitoring is ensured; whether foam interference or steam interference occurs or not when the radar liquid level meter monitors the liquid level is recognized through multiple verification modes, the accuracy of interference reason recognition is improved, the pertinence of maintenance measures is guaranteed, and the situation that the measurement precision of the radar liquid level meter is reduced due to abnormal medium characteristics is avoided.

The invention discloses a magnetostriction liquid level meter temperature compensation method and system based on a support vector machine. The method comprises the steps that the currently captured original pulse number is obtained through a magnetostriction liquid level meter; the current environment temperature is detected in real time through a high-precision temperature sensor in the magnetostrictive liquid level meter; taking the original pulse number and the current environment temperature as input features, sending the input features to a pre-trained support vector machine regression model (SVM), and outputting a displacement error prediction value in the current temperature environment; and correcting the original measurement result according to the error prediction value to obtain a real pulse measurement value after temperature compensation. The system comprises a time-to-digital conversion chip, a temperature chip temperature measurement module, a support vector machine reasoning module, a pulse compensation module and a distance calculation module. According to the method, nonlinear modeling can be carried out on measurement errors caused by environment temperature changes, so that the liquid level measurement result is dynamically corrected, and the overall robustness and precision of a measurement system are improved.

The invention discloses a monitoring system, belongs to the technical field of liquid level monitoring, and particularly relates to a hot well liquid level remote transmission monitoring system which comprises a signal acquisition unit, an automatic control unit and a cloud platform unit, and the signal acquisition unit is composed of a liquid level acquisition module and a visual module; the liquid level acquisition module and the visual module are used for double acquisition of liquid level values and data processing, filtering processing, temperature compensation processing and vibration compensation processing are carried out on two signals respectively, then data correction is carried out, stable and accurate reading data are obtained, meanwhile, the cloud platform unit is used for achieving real-time display of identification results, and the identification accuracy is improved. According to the system, unmanned and real-time monitoring of the boiler double-color liquid level meter is achieved, meanwhile, the recognition result is stable, and the safety of factory production is guaranteed.

The embodiment of the invention discloses a fuel quantity calibration method and device, electronic equipment, a storage medium and a vehicle, and belongs to the technical field of vehicles. The fuel quantity calibration method at least comprises the steps that a first fuel meter display value and a first fuel quantity value are recorded in response to the situation that a vehicle enters a static state; detecting a second fuel quantity value after the vehicle is kept in the static state for a preset time; after a preset time, continuously collecting a preset number of oil quantity resistance values so as to judge whether the oil quantity change trend corresponding to the preset number of oil quantity resistance values is a rising trend or not; and when the difference value between the second oil quantity value and the first oil meter display value is not smaller than a first preset value, the difference value between the second oil quantity value and the first oil quantity value is not smaller than a second preset value, and the oil quantity change trend after preset time is a rising trend, a static refueling calibration strategy is triggered, so that real-time calibration of the oil meter display value in the static refueling scene is achieved. According to the embodiment of the invention, the accuracy of oil meter display can be improved, and the user experience is improved.

The invention relates to the technical field of transformer oil level detection, and discloses an oil level detection system for a liquid-immersed transformer, and the system comprises a detection module which is disposed in an oil cavity of the transformer, and the detection module is configured to obtain temperature data, oil level data and vibration data in the oil cavity of the transformer; the central control module is electrically connected with the detection module, and the central control module is configured to correct the oil level data according to the temperature data and the vibration data; and the early warning module is electrically connected with the central control module, and the early warning module is configured to determine whether to send early warning information or not according to the corrected oil level data. Intelligent correction and risk judgment can be carried out on the oil level information based on the multi-source sensing data, and the accuracy of transformer oil level monitoring and the reliability of early warning response are remarkably improved.

The invention discloses a water level signal analyzing and processing method and system, and relates to the technical field of water level signal analyzing and processing. Comprising the steps of placing a plurality of water level gauges and collecting water level signals of the water level gauges; performing primary processing on the collected water level signal; verifying the effectiveness of the sampling point of the water level signal and the effectiveness of the measured value; and carrying out secondary processing on the water level signal, and carrying out automatic early warning according to a secondary processing result. The accuracy and timeliness of water level prediction are improved, flood control and reservoir management are facilitated, abnormal water level conditions can be found and handled in time, and disaster risks are reduced.

The invention belongs to the technical field of aero-engines, and particularly relates to an aero-engine air inlet flow pipe calibration method, which comprises the following steps of: measuring internal flow field parameters in a standard flow measurement section through a plurality of sensors, and calculating theoretical air mass flow qm1TH of the standard flow measurement section; the actual air mass flow qm1ACT of the standard flow measuring section is measured through a negative pressure air suction type flow standard device; the outflow coefficient of the standard flow measurement section is calculated; connecting a calibrated engine air inlet flow pipe A2 to the front of the standard flow measuring section, and connecting the engine to the rear of the standard flow measuring section; calculating the actual air mass flow of the standard flow measurement section, and taking the actual air mass flow as the actual air mass flow qm4ACT of the calibrated engine air inlet flow pipe A2; and the outflow coefficient of the calibrated engine air inlet flow pipe A2 is calculated based on the theoretical air mass flow qm4TH and the actual air mass flow qm4ACT of the calibrated engine air inlet flow pipe A2.

The invention relates to the technical field of liquid level detection, in particular to a method for eliminating a false liquid level of a urea hydrolyzer, which comprises the following steps: S1, acquiring a liquid level sensor signal, a pressure sensor signal, a temperature sensor signal and an ultrasonic reflection signal of the urea hydrolyzer in real time; s2, performing weighted fusion to generate fused liquid level characteristic parameters; s3, identifying false liquid level characteristics caused by foam layer coverage or steam interference; s4, generating a calibration liquid level value according to the false liquid level characteristics; and S5, comparing the calibrated liquid level value with a preset liquid level-pressure-temperature relation model, and outputting a real liquid level value. According to the invention, by fusing various sensor signals in real time, dynamically adjusting the parameters of the liquid level sensor and combining the liquid level-pressure-temperature relation model, false liquid level interference is accurately eliminated, the accuracy and reliability of liquid level measurement are improved, meanwhile, the equipment safety is ensured, and abnormal operation caused by false liquid level signals is prevented.

A method for determining a filling level of a filling material (104) in a container (102) by means of a filling level sensor (100) is described, wherein the filling level sensor (100) is coupled using signalling to a state sensor (120) for the filling material, having the steps of: determining an environmental condition of the filling material (104) by means of the state sensor (120); comparing the environmental condition of the filling material (104) with a first reference state (310) and a second reference state (320) in order to determine the environmental condition; determining the filling level by means of the filling level sensor (100) on the basis of a particular operating mode of the filling level sensor (100) that is assigned to the particular reference state (310, 320).

The invention relates to a calibration device (5) for calibrating radar-based level measuring devices (1) or their high-frequency module. For this purpose, the device (5) is based on a base body (51). A waveguide (52) runs within a planar plane (A) in this base body. The waveguide (52) is characterized by an input region (521), a coupling region for radar signals (S). HF , R HF ) reflective end region (522), and calibration section running between it (d kal ) out. According to the invention, the waveguide (52) or the calibration section (d) is kal ) are formed in a spirally nested configuration. This results in a spirally nested structure in relation to the length of the calibration section (d). kal ) or of the waveguide (52) achieves a very compact design, so that the calibration device (5) can also be used for recalibrations at the place of use of the level measuring device (1).

The invention relates to the technical field of detection, particularly discloses an ultrasonic guided wave non-contact accurate liquid level measurement method for a high-temperature closed container, and aims at solving the problems that in the prior art, measurement precision is low and interference is prone to occurring in a high-temperature environment. Effective signals are extracted through a self-adaptive interference suppression algorithm, the liquid level is calculated through multi-source data fusion, and an intelligent calibration and self-diagnosis system and a machine learning prediction model are arranged. Experiments show that the measurement error of the method can be controlled within + / -3cm, and the method is remarkably superior to a traditional method and is suitable for accurate liquid level measurement of high-temperature closed containers in the industries of chemical engineering, electric power and the like.

The invention provides an aviation aircraft fuel tank fuel quantity monitoring method and a fuel quantity monitoring system. The aviation aircraft fuel tank fuel quantity monitoring method is applied to a fuel quantity monitoring system, a liquid level image is collected through a visual sensor, and meanwhile, a real-time vibration signal and two-dimensional inclination angle information of a to-be-detected fuel tank are fused; and adaptive feature extraction and fusion are carried out on the acquired liquid level picture, the real-time vibration signal and the two-dimensional inclination angle information based on a pre-trained oil mass prediction model, so that the state change of the to-be-measured oil tank is more comprehensively captured, and finally, the real-time measurement of the residual oil mass of the to-be-measured oil tank under the vibration interference and non-stable flight working conditions is realized. And high-precision measurement of the residual oil quantity of the to-be-measured oil tank in a flight jitter state can be effectively realized. In addition, the multi-information fusion can also provide the anti-interference capability of the model, so that the model can adapt to different flight attitudes and working conditions, the adaptability is improved, the robustness is high, and the accuracy of real-time prediction is ensured.

A fuel system includes a chamber for storing a fuel, an optical differential pressure sensor, and one or more processors in communication with the optical differential pressure sensor. The optical differential pressure sensor is fluidically connected to the chamber and is configured to, when the fuel is stored in the chamber, output a signal indicative of a pressure difference in the optical differential pressure sensor to the one or more processors.

The invention relates to the technical field of aero-engines, in particular to a lubricating oil tank liquid level detection method, device and equipment, a medium and a program product. The method comprises the steps that the measured liquid level of oil in a lubricating oil tank of the aircraft is obtained, and current attitude information of the aircraft is obtained; the attitude information comprises a pitch angle, a yaw angle and a roll angle; based on a standard corresponding relation, a target standard liquid level corresponding to the current attitude information is determined, and the standard corresponding relation is the corresponding relation between the attitude information and the liquid level of the aircraft when oil in a lubricating oil tank is in a normal state; and determining a detection result based on the size relationship between the target standard liquid level and the measured liquid level. By means of the method, the precision of liquid level measurement of the oil in the lubricating oil tank can be improved.

The invention relates to the technical field of flow calibration, and discloses a multi-pipeline flow collaborative calibration system. The system comprises a flow characteristic acquisition module, a flow category classification module, a sequence analysis module, a trend analysis module, a correction module and a collaborative decision module. The flow characteristic acquisition module is used for acquiring current flow data and real-time characteristic information of multiple pipelines and indexing a historical flow data set; the traffic category classification module classifies the historical characteristic information to obtain a plurality of traffic categories, and extracts related information for processing to obtain a historical calibration score set; the sequence analysis module serializes the historical calibration score set and ranks the historical calibration score set according to time to form a historical traffic sequence; the trend analysis module analyzes the flow change rate and the stability deviation rate according to the historical flow sequence; the correction module matches the real-time characteristic information with the traffic category, and corrects the rate value according to the deviation; and the collaborative decision-making module performs multi-pipeline collaborative calibration decision-making based on the corrected data, generates and executes a flow calibration scheme, and assists the multi-pipeline system in precise flow control.

Methods, apparatus, and systems for determining a level of a liquid in a liquid-containing vessel are disclosed. The liquid-containing vessel may be fluidically connected to a displacer cage. The method may include obtaining, with a load measurement device, a weight force of a displacer suspended from the load measurement device and disposed within the displacer cage. The method may also include submerging the displacer into the liquid and obtaining, with the load measurement device, a net force acting on the displacer. The method may further include obtaining, with a liquid density measurement sensor disposed within the displacer cage, a liquid density at a first location of the liquid. The method may still further include determining, using, at least, the net force and the liquid density at the first location of the liquid, the level of the liquid in the vessel.

The invention discloses a river water level detection method, and relates to the technical field of computer processing, and the method comprises the following steps: S01, presetting a distributed pressure sensor array in each target collection region to obtain underwater pressure data k and real-time water flow data v of a plurality of target collection regions of a river to be detected; s02, establishing a dynamic pressure water level model based on the water flow direction pressure conduction quantity estimation of the plurality of target acquisition areas in combination with real-time water flow velocity and wave period parameters; s03, performing signal attenuation compensation on the underwater pressure data according to the dynamic pressure water level model to obtain initial water level data; s04, multi-source data fusion calibration is carried out on the preliminary water level data, a river water level detection result is generated, and the result comprises a wave height frequency spectrum and a water level change curve after peak elimination correction; and S05, generating a wave energy spectral density map according to the calibrated water level data, performing real-time comparison according to the wave energy spectral density map and a preset threshold value, and performing result return according to a comparison structure. The small-wave-height short-period wave measurement precision and the water level detection reliability are remarkably improved, the intelligent flood prevention early warning and dynamic adjusting capacity is achieved, and it is guaranteed that data collection is accurate and consistent.

The present invention aims to easily calculate a calibration formula for calibrating a liquid hydrogen level gauge using a superconductor at low cost without using expensive liquid hydrogen. [Solution] A calibration equation calculation method for calculating a calibration equation to calibrate a liquid hydrogen level gauge that uses a superconductor to detect the liquid hydrogen level in a container by voltage measurement, the method being characterized in that the calibration equation is calculated from the relationship between the voltage value of the liquid hydrogen level gauge and each liquid level height at at least three points with different liquid level heights while pouring liquid having a temperature higher than the critical temperature (Tc) of the superconductor used in the liquid hydrogen level gauge into the container in which the liquid hydrogen level gauge is installed vertically.

A system for monitoring a circuit, comprising a device under test, such as a power field effect transistor or capacitor, coupled to a power source and a signal source and configured to generate a power output using the signal source, a current output, a voltage output and an end of life detector coupled to the current output and the voltage output and configured to generate a first impedance as a function of the current output and the voltage output, to compare the first impedance to a second impedance and to generate an indicator if the first impedance exceeds the second impedance.

The invention relates to a liquid level measurement and correction method for a reactor pressure vessel. The method comprises the following steps: dividing the pressure vessel into a plurality of measurement intervals along a pressure difference direction; acquiring first measurement data of the pressure vessel, calculating the initial measurement liquid level height of the pressure vessel according to the first measurement data, assigning the initial measurement liquid level height to the variable liquid level height to be corrected, judging the measurement interval and correcting; according to the corrected liquid level height and the to-be-corrected liquid level height before correction, the measurement intervals where the corrected liquid level height and the to-be-corrected liquid level height are located are compared, when the corrected liquid level height and the to-be-corrected liquid level height belong to different measurement intervals, the to-be-corrected liquid level height is replaced with the current corrected liquid level height, and the latest to-be-corrected liquid level height continues to be corrected; when the latest corrected liquid level height and the latest to-be-corrected liquid level height are located in the same measurement interval, the latest corrected liquid level height is used as the liquid level height of the coolant in the pressure container; on-line correction of the liquid level of the coolant in the pressure container can be achieved, and the liquid level characterization precision is improved.

Provided is a level meter capable of correctly measuring a level of an object stored in a container. The level meter includes a distribution determination unit, an extraction unit, a candidate determination unit, and a display portion. The distribution determination unit determines the reception intensity distribution of the reflection signal with respect to the distance from the level meter based on the reception intensity of the reflection signal due to reflection of the measurement signal. The candidate determination unit extracts a plurality of combinations of the peak position and the peak intensity from the reception intensity distribution by the extraction unit, and determines the combinations as a plurality of peak candidates. The display portion displays a candidate confirmation screen including the measurement value corresponding to each of the plurality of peak candidates and the reception intensity scale related to the reception intensity.

The invention relates to an anti-interference intelligent liquid level transmitter system which comprises a measuring unit used for acquiring an original liquid level signal; the anti-interference processing unit is in signal connection with the measuring unit and is used for executing anti-interference algorithm processing on the original liquid level signal, and the anti-interference algorithm processing includes adopting an acceleration compensation algorithm and a dynamic filtering algorithm to eliminate measuring errors caused by mechanical vibration and medium flow; and the output unit is in signal connection with the anti-interference processing unit and is used for outputting the standardized liquid level signal. The problem that a traditional static filtering algorithm cannot adapt to a dynamically changing vibration environment in real time is solved.

The invention discloses an automatic pipeline conveying control system driven by liquid level meter signal feedback, and particularly relates to the field of pipeline conveying control, which comprises a data acquisition module, a liquid level state analysis module, a hierarchical control module and a control execution feedback module, the data acquisition module is used for acquiring liquid level height data in the pipeline system and correcting a measurement error; and the real-time liquid level data is compared with a preset liquid level target value, a liquid level deviation value is calculated, and the deviation degree of the current liquid level and the target liquid level is determined. The liquid level meter and the collecting camera are combined, limitation of single equipment is reduced, more accurate and comprehensive data reflecting the liquid level condition can be obtained, the real-time state and the development situation of the liquid level can be accurately known, an accurate basis is provided for follow-up control, when the liquid level is abnormal, countermeasures can be taken in order according to a preset rule, and the accuracy of control is improved. And the failure rate of equipment is reduced, and the maintenance and repair times are reduced.

A system and a method include a container configured to retain one or more liquids. A liquid level sensor is disposed within the container. The liquid level sensor includes sensing elements configured to sense a level of the one or more liquids within the container. A control unit is in communication with the liquid level sensor. The control unit is configured to determine a status of each of the sensing elements based on signals received from the sensing elements.

The invention discloses an ultrasonic liquid level measurement system and device.The ultrasonic liquid level measurement system comprises a converter calibration circuit, a transducer calibration circuit, a liquid level measurement control circuit, a transducer, a first contact and a second contact, one end of the first contact is connected with the liquid level measurement control circuit, one end of the second contact is connected with the transducer, and the other end of the second contact is connected with the transducer. The converter calibration circuit excites an echo signal analog signal according to a multi-pulse driving signal of the liquid level measurement control circuit, the transducer calibration circuit carries out blind area calibration and sensitivity compensation based on the current blind area liquid level, when the converter is calibrated, the first contact and the converter calibration circuit are conducted, and the transducer calibration circuit is switched on. The liquid level measurement control circuit is connected with the converter calibration circuit through a first contact; when the transducer is calibrated, the second contact and the transducer calibration circuit are conducted, and the liquid level measurement control circuit is connected with the transducer calibration circuit through the second contact. The converter calibration circuit and the transducer calibration circuit are used for calibration, and the problems of liquid level measurement deviation and failure are solved.

The invention discloses a system for realizing liquid level calibration of a low-temperature liquid nitrogen biological container through pressure difference. The system comprises a liquid nitrogen container, a nitrogen filling device, an initialization module, a pressure difference measurement module, a liquid level calculation module, a processing module, a communication interface and a display terminal, after the system is initialized, nitrogen with a fixed volume is filled into the liquid nitrogen container through the nitrogen filling device, and the air pressure difference after inflation is measured and recorded; after each inflation, calculating the difference value between the volume of the liquid nitrogen container and the air pressure difference, and organizing into a pressure difference change data set; based on the data set, the liquid level calculation module calculates the relation between the actual volume of the liquid nitrogen container and the liquid level height; the processing module receives the liquid level height information and performs abnormity verification; the communication interface and the display terminal realize visual display of liquid level height information including a real-time curve, an information set and an abnormal alarm; according to the system, the liquid level change in the liquid nitrogen container is indirectly deduced by controlling the volume of filled nitrogen and monitoring the air pressure difference change, and non-contact liquid level calibration is achieved.

The invention discloses a volume correction instrument error analysis method and system based on an improved PE equation, and aims to improve the accuracy of fuel gas and biogas metering. According to the equipment, performance testing can be carried out under the conditions of different temperatures (20 DEG C to 40 DEG C) and pressures (101.3 kPa to 104.0 kPa) through an integrated fuzzy logic algorithm, and the average correction error is only 0.22%. A high-precision sensor and a data processing unit are used for monitoring and calibrating the gas volume in real time and compensating the influence of temperature and pressure changes. The fuzzy logic controller adjusts the reading of the gas meter according to real-time data, the accuracy of a metering result is ensured, algorithm optimization and intelligent equipment integration are focused, and the energy management efficiency is improved. The volume correction instrument provides help for a modern energy metering system and optimization of energy efficiency and cost.