408results about "Testing/calibration apparatus" patented technology

The invention relates to the technical field of intelligent sensing systems, in particular to an algorithm and system for avoiding water surface floating objects and improving monitoring precision based on radar water level monitoring, and the method comprises the following steps: collecting radar echoes, constructing spatial-temporal characteristics based on waveform asymmetry and coherent attenuation gradient, and calculating the spatial-temporal characteristics; according to the method, the central moments of the front edge and the rear edge of the echo are calculated, the waveform asymmetry is quantified, the dynamic stability is analyzed in combination with the attenuation gradient of the multi-time-lag coherence coefficient, the floating object interference is recognized from the double dimensions of the spatial form and the time memorability, and the actual water level is inverted. An effective scattering trailing interval is positioned, nonlinear approximation operation is performed on trailing data in combination with an index physical model, a shielded water surface energy distribution curve is reconstructed, a derivative zero point is solved, distance measurement deviation caused by floating objects is corrected, the real water level height is effectively restored, and the monitoring anti-interference capability and the data accuracy in a complex hydrological environment are improved.

The invention relates to the technical field of industrial automation, and particularly discloses a remote liquid level transmitter system based on HART (Highway Addressable Remote Transducer) communication, which constructs a multi-scale state interaction tensor by synchronously acquiring original sensing signals and communication carrier quality parameters of a transmitter, respectively extracting high-order feature sets of the transmitter and analyzing a nonlinear coupling relationship between the original sensing signals and the communication carrier quality parameters; quantifying the physical health state of the sensor through tensor decomposition and manifold learning, generating a progressive quantification factor representing the integrity degradation of the sensor, predicting a failure mode and residual life based on the change track of the factor, and packaging into an enhanced diagnosis frame for returning; according to the method, the problem that early physical damage and communication interference of the sensor are difficult to distinguish is solved, and accurate early warning and predictive maintenance of hidden faults are achieved.

The invention discloses a self-calibration and drift compensation method for an automatic underground water monitoring station, and the method comprises the following steps: 1, transmitting a reference measurement starting instruction to an underground bubble method device by an edge calculation gateway, forming a reference data pair by a bubble method water level reference value and a reference acquisition moment, and writing the reference data pair into a reference data cache region; 2, the edge computing gateway creates a state storage structure and a covariance storage structure; and step 3, the edge computing gateway reads a drift amount estimation value from the state storage structure as a drift compensation amount, and when a drift estimation standard deviation exceeds a set threshold, bubble method hardware reference acquisition is triggered. According to the invention, the problems of high manual calibration cost and lack of independent reference support in pure software estimation in the prior art are solved, so that a monitoring station can stably operate for a long time under an unattended condition and continuously output high-precision underground water level monitoring data.

The invention belongs to the technical field of high-precision liquid level detection, and particularly relates to a high-precision liquid level detection method which comprises an installation preparation module, an installation position determination module, a comprehensive consideration module and a special installation method module. And the liquid level detection precision can be obviously improved. The photoelectric sensor is sensitive to light change and suitable for directly detecting the liquid surface; the ultrasonic sensor determines the distance by measuring the propagation time of sound waves, and is relatively insensitive to the change of liquid properties. The combination of the two can complement deficiencies and reduce errors.

The invention belongs to the technical field of instrument and meter and Internet of Things monitoring, particularly relates to a wireless liquid level remote monitoring liquid level meter and a monitoring system, and aims to solve the problems of low precision and poor stability caused by insufficient temperature resistance, hanging material interference and lack of automatic calibration in high-temperature molten salt liquid level measurement. The system comprises a 1000 DEG C-resistant double-layer coaxial capacitance sensing probe, a self-adaptive signal conditioning module, a wireless transmission unit, a remote monitoring terminal and a dynamic calibration engine, material hanging is inhibited through a porous ceramic electrode, the signal precision is improved through differential capacitance and temperature compensation, and manual-free online calibration is realized based on the dielectric property of molten salt. The system supports remote visualization and intelligent alarm, and is suitable for extreme working conditions such as photo-thermal power generation.

The invention belongs to the technical field of laser volume calibration, and particularly relates to a laser volume calibration system for a laboratory portable pipettor, which comprises a volume calibration equipment main body and a calibration container, and is characterized in that the volume calibration equipment main body is integrated with an integrated optical measurement module, a data acquisition and intelligent processing unit and a man-machine interaction module; the height change of the liquid level center point can be accurately measured, the specific forms such as the contact angle, the curvature radius and the depth of the liquid level meniscus can be captured and analyzed in real time through images, the liquid level form correction module can accurately calculate the missing volume caused by the concave meniscus by using the parameters, and the accuracy of the missing volume is improved. According to the method, the actual liquid level height is calculated and compensated to the final actual liquid level height, the systematic measurement deviation caused by neglecting the geometrical shape of the meniscus in a traditional single laser ranging method can be fundamentally solved, the volume measurement precision is remarkably improved, and the calibration precision can be improved to a new level.

The invention provides a reservoir water rain condition monitoring system and a monitoring method, the system constructs a dual monitoring system of physical observation reference and electronic automatic acquisition, a customized stainless steel water gauge and a multi-element acquisition device are deployed on key sections of a reservoir dam and a drainage basin, and a front-end edge calculation module is utilized to invert the flow in real time. And after the data is transmitted to the cloud platform, intelligent management and control are carried out through the four-pre functional module. The system displays the watershed situation based on a GIS graph, integrates an online flow measurement algorithm to generate a water and rain condition process line in real time, and realizes visual supervision by combining video monitoring and OSD data superposition. The core multi-target optimization scheduling model comprehensively considers flood control safety and power generation benefits, generates an optimal scheduling scheme through simulation deduction, and provides a closed-loop control interface. The problems of low monitoring precision, scheduling decision lag and the like in the prior art are solved, and the automatic management level and the water resource utilization rate of the reservoir group are remarkably improved.

The invention discloses an intelligent sensing data processing method based on an electronic water gauge, which belongs to the field of water level sensors and comprises the following steps: acquiring visible light images, infrared thermal imaging, ultrasonic ranging and pressure type water level values to form multi-source data; constructing a Kalman filter and defining a water level state vector based on the obtained multi-source data, dynamically adjusting a weight factor and a noise covariance matrix according to the real-time confidence of each sensor, and outputting a preliminary water level estimated value and a corresponding confidence index after fusion calculation; fusing the obtained multi-source data into four-channel input data, inputting the four-channel input data into a pre-trained U-Net model for semantic segmentation, generating a water surface shelter segmentation mask, identifying the type of a shelter based on the mask, and calculating a shelter area proportion; and extracting a water line edge point set of an unshielded region from the original image by using the generated shielding object segmentation mask, reconstructing a continuous water line through linear fitting, and performing interpolation filling on the shielded region.

The invention relates to a water level frequency calibration method of clothes processing equipment and the clothes processing equipment. The water level frequency calibration method of the clothes processing equipment comprises the steps that the number of alternating current zero crossing points is obtained within the preset timing time of an internal clock; and calibrating the water level frequency based on the preset time and the alternating current zero crossing point times. According to the technical scheme, the error of an internal clock is reduced, so that the accuracy of the detected water level frequency is improved, an external clock does not need to be used for providing a clock, and the cost of the clothes treatment equipment is reduced.

The invention provides a ship liquid level intelligent monitoring system. The ship liquid level intelligent monitoring system comprises a data acquisition layer, a data processing layer and an application layer, the data acquisition layer comprises an inertial measurement unit and a liquid level measurement unit, the inertial measurement unit is used for measuring ship attitude information, and the liquid level measurement unit is used for acquiring original liquid level information in a liquid tank; the data processing layer comprises a data preprocessing module, an intelligent liquid level correction module, a model training updating module and a local server, the data preprocessing module is used for preprocessing information, and the intelligent liquid level correction module can calculate static liquid level information according to the preprocessed information; the model training and updating module can utilize historical navigation data stored in the local database to train the liquid level dynamic correction model; the application layer is used for receiving and displaying the static liquid level information; according to the invention, the finally output liquid level value is close to the real static liquid level, and the measurement precision and reliability are greatly improved.

The utility model provides a double-insurance liquid nitrogen liquid level detection device, and belongs to the field of monitoring equipment of an assisted reproduction laboratory. Comprising an upper cover body, a thermal insulation material column, a liquid level sensor, a temperature sensor and an electric control mainboard. The electric control mainboard is installed on one side face of the upper cover body, the heat preservation material column is connected to the other side face of the upper cover body, a positioning connecting piece is arranged at the end, away from the upper cover body, of the heat preservation material column, and the liquid level sensor and the temperature sensor are arranged in parallel, embedded in the positioning connecting piece and electrically connected with the electric control mainboard. The electronic control mainboard is provided with a display panel used for displaying detection values of the liquid level sensor and the temperature sensor, and the display panel is configured to send alarm information when the detection values are abnormal. The technical problems of difficulty in real-time detection of the liquid level in the liquid nitrogen tank and low detection accuracy caused by structure and detection accuracy defects of a traditional detection mode in the related technology can be solved.

The invention discloses a dynamic liquid level detection system and method based on a capacitance-photoelectric dual-mode sensor, and the system comprises a dual-mode sensor module which comprises a capacitance sensor used for measuring the capacitance value change caused by the liquid level change; the photoelectric sensor is used for measuring the light intensity change caused by the liquid level change; the signal processing module is used for processing original signals of the capacitive sensor and the photoelectric sensor; the dynamic calibration module comprises a temperature sensor and a microcontroller MCU, and the microcontroller MCU is configured to receive and process the signal from the signal processing module; dynamically adjusting the excitation frequency of the capacitive sensor according to the temperature value read by the temperature sensor and a preset sample viscosity type; based on a self-adaptive weighted fusion algorithm, fusing the processed capacitance signal and the photoelectric signal, and outputting final liquid level information; and when bubbles are detected, the control system is switched to a pure capacitance detection mode. According to the invention, high-precision liquid level detection can be realized.

The utility model relates to the technical field of admittance emulsification horizon meters, in particular to a novel admittance emulsification horizon meter which comprises a bottom plate and a protection pad, the bottom of the bottom plate is fixedly connected with the top of the protection pad, the left side of the top of the bottom plate is connected with a control structure, and a round opening in the right side of the top of the bottom plate is fixedly connected with a horizon meter. And the top of the control structure is connected with a second threaded cylinder. Then the vertical rod is rotated to enable the straight plate to rotate, the admittance emulsifying material is stirred to eliminate surface bubbles, then the vertical rod is pulled upwards to enable the straight plate to be separated from the admittance emulsifying material, and then the handle drives the screw rod to rotate backwards to be connected with a round opening in the outer wall of the vertical rod in an inserted mode; next, after waiting for a period of time, the admittance emulsifying materials attached to the outer walls of the straight plate and the vertical rod fall off, then the horizon meter is used for detecting and checking whether the two results are consistent or not, the use limitation of the horizon meter is eliminated, and the horizon meter can be used under various conditions.

The utility model relates to a vacuum chamber applied to a weighing method micro gas flow standard device, the standard device comprises an electronic scale, a weighing tank and a connecting pipe, the vacuum chamber comprises a housing, the housing is arc-shaped, the housing comprises a housing body and a cover body, the housing body and the cover body are sealed to form a cavity, and the standard device is suitable for being placed in the cavity; the locking assembly is used for fastening or loosening the shell and the cover body; the interface assembly comprises a first interface, a second interface and a third interface which are arranged on the shell, the first interface is suitable for being connected with a vacuum pump, the vacuum pump can suck the cavity to target pressure through the first interface, the second interface is suitable for being connected with air, and the third interface is suitable for leading out a connecting wire to be connected with an external power supply; the standard device is used for weighing the weighing tank in a vacuum environment without being influenced by air buoyancy, and the temperature in the vacuum environment is relatively stable, so that the influence of the air buoyancy and the environment temperature on the result of the weighing tank is avoided, and the weighing accuracy is ensured without complex calculation.

The application discloses a redundant measurement value transmitting method for a single measuring point water level gauge of a ship lock chamber. The method comprises the following steps: simultaneously detecting the water level of a certain measuring point in the ship lock chamber by N water level gauges, obtaining multiple water level detection values of the measuring point at a certain time; determining a water level deviation threshold G2 of the measuring point and a detection value deviation threshold G3 of the multiple water level gauges according to a ship lock chamber water level change threshold G1 and a water level gauge detection range R; comparing the multiple water level detection values Vn of a certain measuring point with the determined water level deviation threshold G2 of the measuring point; performing difference value operation on the obtained reasonable water level detection value Vm; selecting N1 water level detection values as the water level detection basic data of the measuring point, performing secondary processing, and obtaining the water level detection effective value Ve of the measuring point. The application discloses a redundant measurement value transmitting method for a single measuring point water level gauge of a ship lock chamber. The ship lock single measuring point adopts multiple water level sensors for redundant detection, voting verification, error processing and detection value transmission of multiple detection values, and reliable and stable water level data is provided for the system.

This utility model relates to the field of aviation measurement tool technology, specifically a fuel level signal tester, including a bracket, a simulated fuel tank, an upper cover, a lower cover, a nitrogen cylinder, a first pressure gauge, a dual-way valve, a three-way connector, a second pressure gauge, a high-pressure hose, and a multimeter. The simulated fuel tank is fixed on the bracket, the fuel level signal to be tested is mounted on the upper cover, and a valve is provided at the lower end of the lower cover. The upper and lower covers are mounted on the simulated fuel tank, forming a sealed cavity with the simulated fuel tank. The outlet of the nitrogen cylinder is connected to the inlet of the dual-way valve via a high-pressure hose, and the outlet of the dual-way valve is connected to the second pressure gauge and the valve at the lower end of the lower cover via a high-pressure hose. The nitrogen cylinder is pre-filled with high-pressure nitrogen. The multimeter is externally mounted, and its positive and negative terminals are connected to the first and second pins of the fuel level signal to be tested. This utility model can simulate the working environment of the fuel level signal on the ground, thereby avoiding on-air testing, resulting in low testing cost and short cycle.

The invention discloses a radar liquid level calibration, calibration, compensation and blind area mapping method and system based on a baffle plate, and belongs to the technical field of liquid level measurement. The method comprises the following steps of: firstly, performing interval calibration on a radar measurement value according to a real distance between baffle plates under an empty tank condition, and determining a zero point by taking the first baffle plate as a reference; secondly, under the conditions of normal temperature and normal pressure, the positions of the shielding plates are calibrated by combining a sine dip angle error generated by the fact that a wave guide tube is not parallel to the wave beam direction, and calibration parameters are obtained; thirdly, under the actual working condition, according to the corresponding relation between the measured value and the actual value of the known waveguide section above the liquid level, deducing the actual propagation speed of the electromagnetic wave in the gas, and compensating the liquid level measurement result according to the actual propagation speed; finally, by means of the coupling relation between the shielding plate below the liquid level and the liquid level, the mapping of the liquid level blind area is achieved by analyzing the proportional relation generated by the measurement value of the shielding plate along with the change of the liquid level. The precision and reliability of radar liquid level measurement can be effectively improved under the complex working condition, and the measurement defect caused by a blind area is overcome.

A process automation field device having field device electronics with at least one communication interface and a security module with a plurality of functional units for implementing a plurality of predetermined IT security levels of different severity, the security module having a selection element for selecting an IT security level, the functional units necessary for implementing the selected IT security level being activated and / or the unnecessary functional units being deactivated on the basis of the selection.

To provide a gas meter capable of streamlining recovery work while ensuring the safety of the entire gas infrastructure including gas meters, and a gas shutoff reset determination system.SOLUTION: The gas meter includes: a flow rate measurement unit that is provided in a flow channel through which gas supplied to a gas appliance installed in a consumer's house flows, and measures a flow rate of the gas flowing through the flow channel; a self-diagnosis unit that performs self-diagnosis; a vibration detection unit that detects vibrations; a calculation unit that calculates earthquake index values that indicate the magnitude of earthquakes based on the vibration detected by the vibration detection unit; a shutoff unit that is switched from an open state in which gas can flow through the flow channel to a closed state in which the flow of the gas in the flow channel is shut off when the earthquake index value is equal to or higher than a predetermined value; and a reset method determination unit that determines a resetting method from the closed state to the open state of the shutoff unit based on a diagnosis result by the self-diagnosis unit and the earthquake index value when the shutoff unit becomes the closed state.SELECTED DRAWING: Figure 1A

The application provides a constant flow liquid supply device for flow meter calibration, and relates to the technical field of flow meter calibration, which comprises a cylinder, a piston and a flow straightener. A water storage cavity in the cylinder is divided into a rod cavity and a rodless cavity by the piston. The piston is driven to reciprocate along the axial direction via a driving assembly. The flow straightener has a first flow path and a second flow path, which have the same fluid direction flowing through the flow meter. The rod cavity is provided with a first outlet and a second outlet, and the rodless cavity is provided with a third outlet and a fourth outlet. The first outlet is used to communicate with the water inlet end of the first flow path or the water outlet end of the second flow path. The second outlet is externally connected with a water storage tank used to accommodate excess liquid in the rod cavity. The third outlet is used to communicate with the water outlet end of the first flow path or the water inlet end of the second flow path. The fourth outlet is externally connected with a water supplement tank used to supplement liquid in the rodless cavity, so that the liquid volume in the water storage cavity is constant, the circulation of liquid is realized, and the problem that the existing liquid supply device for flow meter calibration cannot provide a stable liquid source is solved.

The invention relates to a sensor reading system for collecting data from a sensor device of a vehicle, wherein the sensor reading system comprises: - a processing device for obtaining the sensor data; - a multicore cable connected to the processing device on one end thereof and comprising a plug on the other end thereof for connecting the multicore cable to the sensor device of the vehicle, wherein the plug comprises conducting protrusions, each conducting protrusion connected to a corresponding core of the multicore cable. The invention further relates to a method for using the sensor reading system for determining a stored configuration of a multicore cable of the sensor reading system.

The invention relates to the technical field of gas valve well accumulated water detection, in particular to a gas valve well accumulated water multi-source sensor dynamic calibration pumping drainage system and method, and the system comprises a sensing layer module, a verification layer module, an execution layer module and a monitoring layer module. The system collects water level, turbidity and vibration spectrum data through a multi-source sensor, generates an initial confidence coefficient weight in combination with edge calculation, judges the ponding state based on a weighted consistency index, drives pumping and drainage equipment to execute optimization operation, and dynamically adjusts a pumping and drainage mode to prevent dry rotation or overload of a pump at the same time; according to the method, the false alarm rate in a complex underground environment can be remarkably reduced, the invalid pumping and drainage frequency is reduced, the service life of equipment is prolonged, and the system response speed and the energy efficiency performance are improved.

The present invention relates to a service and retrofit device for a level measuring device, wherein the service and retrofit device is configured to be connected to the level measuring device during commissioning and / or operation of the level measuring device; wherein the service and retrofit device is configured to be coupled to an operating terminal for the level measuring device; and wherein the service and retrofit device is configured to retrofit at least one additional functionality from a hardware or software component for the commissioning and / or operation of the level measuring device, at least temporarily.

The utility model discloses a detachable anti-blocking liquid level meter, which relates to the technical field of liquid level sensors and comprises a connecting cylinder, the outer surface of the connecting cylinder is in threaded connection with a protective cover, the bottom surface of the protective cover is provided with a first liquid inlet and four second liquid inlets for liquid to enter and exit, and a filter screen is arranged in the protective cover. The inner wall of the connecting cylinder is in threaded connection with a sealing block. According to the liquid level sensor, the filter screen is used for filtering liquid entering the liquid level sensor through the liquid inlet hole, so that impurities in the liquid are prevented from obstructing a detection area of a detection element of the liquid level sensor, the possibility of a detection blind area is reduced, and the detection precision is ensured; the liquid level sensor is simple in structure and convenient to use, the speed of liquid entering the liquid level sensor can be increased, the detection efficiency of the liquid level sensor is improved, the detection end of the liquid level sensor is protected when the liquid level sensor is not used, the influence of external dust and other impurities on a detection element is avoided, and meanwhile the liquid level sensor can be conveniently disassembled and overhauled.

The invention discloses a universal high-temperature liquid medium liquid level height measuring device, and belongs to the technical field of liquid level height measuring devices. A universal high-temperature liquid medium liquid level height measuring device comprises a base and a smelting furnace crucible movably installed on the base, a sensor fixing frame is fixedly connected to the position, located on the side face of the smelting furnace crucible, of the base, and a buoy measuring assembly is movably installed on the sensor fixing frame. The laser sensor does not need to be in contact with high-temperature liquid, so that the laser sensor is not prone to damage, through the arranged cleaning assembly, after the measuring buoy is moved out of the liquid level, the high-temperature liquid on the measuring buoy is purged, the liquid on the measuring buoy can conveniently flow back into a smelting furnace crucible, residual liquid on the measuring buoy is reduced, and the influence on subsequent use of the measuring buoy is reduced; through the arranged calibration assembly, the floating plate and the measurement buoy are measured, whether the measurement buoy horizontally floats in the liquid or not is judged, and the accuracy of liquid level height measurement is improved.

Methods and apparatus, such as a controller of a respiratory therapy device, generate a signal representing an estimate of flow rate of gas flow from the device. The respiratory therapy device may include a motor-operated blower. The method may include receiving in the controller, signals generated by a set of sensors, including measures of pressure and frequency (e.g., speed) of the motor. The controller may be configured to compute an entrained air density function and generate the estimate signal based on a function of the measures of pressure and frequency, and the entrained air density function. The entrained air density function may apply signals from additional sensors, such as atmospheric pressure, gas temperature, and ambient relative humidity, to compute atmospheric density. Control operations of the therapy device may then be based on the estimated signal, which may be applied to assess accuracy of a signal from a flow sensor.

Methods and apparatuses, such as a controller of a respiratory treatment device, generate a signal representing an estimate of flow of air from the device. The respiratory treatment device can include a motor-operated blower. The method can include receiving, in the controller, signals generated by a set of sensors including measurements of pressure and frequency (e.g., speed) of the motor. The controller can be configured to calculate an entrained air density function and generate the estimate signal based on a function of the measurements of pressure and frequency and the entrained air density function. The entrained air density function can apply signals from additional sensors, such as atmospheric pressure, gas temperature, and ambient relative humidity, to calculate air density. Control operations of the treatment device can then be based on the estimated signal, which can be used to estimate accuracy of signals from flow sensors.

The invention relates to the technical field of sensor verification, and particularly discloses an evaporation sensor verification device and method.The device comprises a verification table and a control box, a water storage tank, a test box and a water pump communicating the water storage tank with the test box are arranged in the verification table, the water storage tank is provided with a water level gauge, and the top of the water storage tank is provided with a standard evaporator installation base and a tested evaporator installation base; a control circuit board and an electronic leveling instrument are arranged in the control box, and the circuit board is electrically connected with all the components. The method comprises the steps that the standard evaporator emits 80GHz wave beams to measure the liquid level, the water pump controls the water level change, standard and tested instrument data are synchronously collected, and multiple test points are measured and transmitted to the display screen. The problems that an existing device is low in precision, poor in stability and complex in operation are solved. The radar type standard evaporimeter is adopted to measure the liquid level, errors are reduced, the multiple measured evaporimeter installation bases improve the verification efficiency, and the device is suitable for efficient and accurate verification of the evaporation sensor.

A range automatic switching control system and method of a flow calibration device, the system comprising a multi-stage sensor array connected in parallel and partially overlapping in range, a high-speed switching valve group for controlling the on-off of each flow path, a signal acquisition unit, and a central control unit. The central control unit intelligently judges and executes the range switching instruction according to the acquired instantaneous flow, flow calibration range, fluid temperature, and pipeline pressure, etc. characteristic parameters, and realizes undisturbed range switching through pre-charge pressure and rapid synchronous switching. The present application realizes full-automatic undisturbed range switching in the flow calibration process. The system always selects the optimal range sensor, maintaining high resolution and high accuracy within the full flow range. Through pre-charge pressure and millisecond-level rapid switching, it ensures that the flow fluctuation is less than 0.1%, and the calibration process is continuous and uninterrupted. The intelligent decision mechanism can actively predict and avoid the risk of over-range, effectively protecting the sensor, and greatly improving the calibration efficiency, data reliability, and equipment safety.