549 results about "Liquid level measurement" patented technology

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 motorcycle instrument fuel quantity display calibration method based on multi-sensor fusion. The method comprises the following steps: acquiring a data signal of a sensor, fusing and preprocessing data, calculating a fuel consumption rate by adopting a dynamic self-adaptive fuel consumption model, predicting the remaining fuel quantity, and dynamically adjusting the remaining mileage; and self-adaptive calibration: based on a dynamic self-adaptive fuel consumption model, displaying the remaining fuel quantity, the instantaneous fuel consumption, the average fuel consumption and the estimated endurance mileage by an instrument, and displaying a historical fuel consumption trend in a thermodynamic diagram form. The method has the advantages that multi-sensor data and dynamic environment compensation are fused, the liquid level measurement error is smaller than + / -1%, the endurance prediction error is smaller than + / -5%, the overall oil mass calculation precision is improved to 98%, the DAFCM model supports millisecond-level response, the method dynamically adapts to complex driving scenes, resource occupation is low, the method is suitable for a low-end vehicle-mounted controller, and the method is suitable for large-scale popularization and application. And reliable data support is provided for intelligent travel.

The invention discloses a radar wave measurement method and system for the liquid level of a storage tank, and relates to the technical field of liquid level measurement. The radar wave measurement method for the liquid level of the storage tank comprises the following steps: acquiring radar echo signal data of the storage tank in a set measurement period, and preprocessing the radar echo signal data; based on a pre-trained liquid level identification deep learning model, performing prediction analysis on the radar echo signal data to obtain a liquid level feature set of the storage tank; and acquiring liquid level control parameters of the storage tank, analyzing liquid level control driving indexes of the storage tank in combination with the corresponding liquid level feature set, and controlling the start-stop state of a water pump of the storage tank based on the liquid level control driving indexes. Multi-dimensional modeling is carried out on radar echo signal data in a continuous time period, the limitation that a traditional liquid level measurement method depends on echo signals at a single moment to carry out height judgment is broken through, and the method is particularly suitable for industrial liquid level monitoring requirements with high disturbance and high precision requirements.

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 a gas-liquid interface identification and ship sloshing liquid level correction method and system, and the method comprises the steps: extracting image edge and gray texture features, achieving the state identification of a liquid-gas interface through a lightweight convolutional neural network model, and dynamically generating a collection strategy according to the state identification; then collecting original liquid level signals and synchronously obtaining IMU data, extracting a multi-mode component through signal decomposition, constructing a disturbance recognition model by combining an IMU, filtering disturbance related components and reconstructing a stable liquid level; and further modeling the disturbance component into a residual sequence, realizing disturbance trend prediction and liquid level dynamic correction by using a time sequence prediction model, and outputting more stable and reliable liquid level data. The problem that liquid level measurement is unstable in the LNG ship sloshing environment can be effectively solved, image recognition and IMU data are fused, liquid level disturbance suppression and dynamic correction are achieved, and the method has the advantages of being self-adaptive, resistant to interference, stable in measurement and the like and is suitable for high-precision liquid level monitoring under the complex working condition.

The invention discloses a single-ultrasonic-head sensor for measuring liquid density and liquid level height, which relates to the technical field of liquid level measurement and comprises a floater component, a reflection cavity component and an ultrasonic sensor component. The floater assembly is assembled on the reflection cavity assembly, the reflection cavity assembly is connected with the ultrasonic sensor assembly, and the ultrasonic sensor assembly is connected with the floater assembly through the reflection cavity assembly. High-frequency ultrasonic waves are transmitted and received through a single point, the sound velocity (density) and the ultrasonic wave return time difference (liquid level) are synchronously analyzed, the density and the liquid level of the urea solution are calculated, the problems of mechanical interference and data splitting are avoided, and the trepanning and cable cost is reduced; the shared high-precision temperature compensation module directly eliminates compensation deviation of the split system, and maintenance only needs single-point anti-crystallization treatment; and in combination with a cross validation algorithm (density liquid level logic mutual verification), the operation and maintenance cost is reduced while the data reliability is improved, and the method is particularly suitable for space-limited and highly-corrosive urea solution detection scenes.

A method and system for preventing condensation of an ultrasonic liquid level meter. The method comprises: connecting a heat tracing unit to an ultrasonic liquid level meter, and deploying a temperature monitoring module; on the basis of a measurement result of the monitoring module, calculating the dew point of the surface of a probe of the ultrasonic liquid level meter; and comparing the dew point with the surface temperature of the liquid level meter measured by the monitoring module and, on the basis of a heating control execution module, performing dynamic temperature control. By means of deploying the heating unit and the temperature monitoring module, the present invention measures the surface temperature of the probe in real time and, on the basis of the calculated dew point, dynamically adjusts heating power, such that the surface temperature of the probe is higher than the dew point temperature, thus effectively avoiding condensation and solving the effect of environment temperature and humidity on the precision of liquid level measurement.

The invention discloses a liquid level sensor device of a pesticide preparation tank, and relates to the technical field of liquid level measurement. The device comprises a first acquisition module for acquiring internal component parameters of a pesticide preparation tank and working condition parameters of a preparation process, and an initial mounting position determination module for determining an initial mounting position of a radar liquid level sensor according to related parameters; after the second acquisition module acquires liquid level data and an original radar signal, the change amplitude calculation module calculates the change amplitude of the stirring speed, and if the change amplitude exceeds a threshold value, the dynamic adjustment module dynamically adjusts the position of the sensor; and the liquid level compensation value generation module generates a compensation value by using a trained liquid level dynamic compensation model of correlation mapping of the stirring speed and the measurement error in combination with the liquid level data, the original radar signal and the working condition parameters, and finally, the dynamic fusion module fuses the initial liquid level data and the compensation value to obtain an accurate liquid level value. According to the method, the accuracy of liquid level measurement in the pesticide preparation process can be effectively improved by dynamically adjusting the position of the sensor and based on multi-parameter dynamic compensation.

The utility model relates to the technical field of liquid level sensing, in particular to a non-contact capacitance liquid level sensor which comprises a cavity outer wall and further comprises a first capacitance plate and a second capacitance plate which are arranged on the cavity outer wall, the first capacitance plate and the second capacitance plate are shortened to form interdigitals, and the interdigitals are arranged in the direction perpendicular to the liquid level change direction. When the liquid level in the cavity rises or falls, the dielectric constant of the liquid is different from that of the air, so that the capacitance value between the interdigital electrodes changes. Liquid level measurement can be achieved by measuring capacitance changes and combining the signal processing module to calculate the corresponding relation between the capacitance and the liquid level. The sensor is mounted on the outer wall of the cavity and does not need to be in direct contact with liquid, so that the problems of pollution, corrosion and mechanical wear of a traditional contact sensor are avoided, and the service life and reliability of the sensor are improved. In addition, the device has the advantages of stable measurement, quick response, high precision and the like.

The invention provides a liquid level measuring device, a liquid level measuring method and a liquid container, and the liquid level measuring device comprises a sensor which is provided with a stay wire; the rotating component is connected with the other end of the stay wire and is used for rotating by taking a rotating shaft as a center; one end of the connecting rod is fixed to the rotating assembly, and the other end of the connecting rod extends outwards from the rotating assembly; the buoy is connected to the other end of the connecting rod and floats on the surface of the liquid, the buoy moves along with the change of the liquid level of the liquid, the movement of the buoy drives the connecting rod to rotate with the rotating shaft of the rotating assembly as the center, and meanwhile, the movement of the buoy drives the pull wire to generate displacement through the rotation of the connecting rod and the rotating assembly; the processor is electrically connected with the sensor; the sensor is used for converting displacement generated by the stay wire into electric signals, and the processor determines and outputs liquid level data of liquid based on the electric signals. Accurate detection of the liquid level is achieved, tiny changes of the liquid level can be detected, meanwhile, the buoy cannot be wound in the moving process, and product faults are avoided.

The invention relates to a level measuring device (1) for determining a level (L) of a filling material (2), which comprises the following components: - A high-frequency unit (10) for generating and transmitting radar signals (S HF ) along a beam axis (a) towards the filling material (2), and for receiving corresponding reception signals (R HF ) after reflection at the product surface, - an evaluation unit for determining the fill level (L) based on the received signal (R HF ), and - two radar lenses (11, 12) arranged one behind the other in the beam axis (a). According to the invention, the apertures of the radar lenses (11, 12) are selected such that their distance (b 11 + f 12 ) to each other the sum of the image distance (b 11 ) of the first radar lens (11), and the focal length (f 12 ) of the second radar lens (12). This allows the radar signals (S HF , R HF) through a thermally insulating housing neck (131). Furthermore, the inventive design of the apertures within the housing neck (131) allows a radar window (14) serving as explosion protection to be arranged in such a way that the beam guidance is only minimally restricted.

The utility model belongs to the technical field of drainers, and particularly relates to a real-time monitoring and alarming device for a gas drainer, which is characterized in that a gas pipeline and a drainer body are respectively provided with a heat tracing device, so that the upper end of a downpipe and the upper end of an overflow pipe are prevented from being blocked. The first communicating pipe is arranged on the vertical section of the downpipe, the second communicating pipe is arranged on the vertical section of the overflow pipe, and when the downpipe and the overflow pipe are not blocked, water cannot be stored in the first communicating pipe and the second communicating pipe; when the downpipe and the overflow pipe are blocked, accumulated water in the downpipe and the overflow pipe can enter the first communicating pipe and the second communicating pipe respectively, so that the accumulated water is detected by the first liquid level measuring device and the second liquid level measuring device, and the alarm system gives an alarm of blocking at the corresponding position; in addition, whether the liquid level in the drainer body is too low or not is monitored through the third liquid level measuring device, the alarm system can give out an alarm about the sealing problem of the corresponding position, and therefore specific faults of the drainer can be rapidly recognized.

The invention relates to the field of liquid level measurement, and discloses a liquid level measurement method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a liquid level signal obtained by monitoring a to-be-measured liquid level at present and / or the acceleration during liquid movement; the liquid level signal is processed through a preset first filtering model, a first measurement result of the liquid level is obtained, and the first filtering model processes the liquid level signal through historical liquid level signals in the sliding window; adjusting the size of the sliding window according to the acceleration to obtain a second filtering model, and obtaining a second measurement result of the liquid level by using the second filtering model; a third filtering model corresponding to the current liquid level state is determined according to the fluctuation condition of the liquid level signal, and a third measurement result of the liquid level is obtained through the model; and performing weighted fusion on at least two of the first measurement result, the second measurement result and the third measurement result to obtain a final measurement result. Different filtering models are fused, and the reliability of liquid level measurement is improved when the liquid is in a non-stationary state.

The utility model discloses a liquid level floating ball device, which relates to the technical field of liquid level measurement, and comprises a support rod, a floating ball, a floating ball and a floating ball, the magnetic detection assembly is arranged in the mounting cavity; the floating ball is arranged on the periphery of the supporting rod in a sliding mode; and the magnet is embedded in the floating ball, and the floating ball slides along the supporting rod along with the liquid, so that the magnet is close to or far away from the magnetic detection assembly. According to the technical scheme, the mode that the magnet is embedded into the inner side of the floating ball is adopted, metal impurities in a detection medium adsorbed by the floating ball are reduced, and therefore the accuracy of the liquid level floating ball device is improved.

The invention provides an oil level collecting and monitoring system and method for engineering mechanical equipment, and relates to the technical field of liquid level measurement. Respectively carrying out edge pulse coding and discrete pulse modeling on the transparent window image sequence of the oil tank and the penetration echo signal of the oil to obtain an oil surface edge characteristic, a dynamic change characteristic and a multipath reflection response curve; determining sensitive characteristics according to the multipath reflection response curve, and performing relation mapping on the sensitive characteristics, the oil surface edge characteristics and the dynamic change characteristics to obtain a joint relation matrix; an oil level joint estimation vector is output through a relation model of the joint relation matrix, and then an oil level calculation curve is determined according to the oil level joint estimation vector and the oil level vibration rate; oil level acquisition and abnormity monitoring early warning of the engineering mechanical equipment are carried out according to the oil level calculation curve, an oil level early warning result is obtained, abnormity early warning calculation can be carried out based on space-time resonance modeling of the oil level, and intelligent early warning of oil level monitoring is achieved.

The invention discloses an in-vitro liquid level measurement method and device based on millimeter wave radar and a medium, and relates to the technical field of liquid level measurement, and the method comprises the steps: collecting geometric parameters of a container, building a container coordinate system, and forming static background data; the millimeter wave radar array is controlled to radiate millimeter wave signals in sequence, a receiving channel receives reflection echoes, amplification, frequency mixing, filtering and sampling processing are carried out, and array time sequence data are obtained; according to the array time sequence data, generating a distance direction frequency spectrum data set, combining static background data to carry out background deduction, executing an incident direction estimation algorithm, obtaining scattering point cloud under a container coordinate system, and generating a liquid level two-dimensional contour; based on the two-dimensional contour of the liquid level and the geometric parameters of the container, effective bottom surface grids are screened, the estimated value of the liquid volume in the container is obtained and converted into the equivalent liquid level height, and the final liquid level height is obtained. The two-dimensional fluctuation form of the liquid level is finely described, and the liquid volume and liquid level height measurement precision is improved.

The invention discloses an oil pumping unit indicator diagram correction and production and liquid level metering method based on data driving, and relates to the technical field of oil exploitation, and the method comprises the following steps: S1, obtaining indicator diagram data of an oil field oil pumping unit well, and collecting an original suspension center indicator diagram through a power indicator; s2, obtaining a temperature drift correction coefficient and a null drift correction coefficient according to basic data in the original suspension point indicator diagram, and correcting a load measured by a suspension point to obtain a corrected indicator diagram; s3, displacement of different layers is obtained through operation according to a difference method, loads of time points of different layers are obtained in combination with the Hooke law, and indicator diagrams of different positions of the sucker rod string are obtained; and S4, a pump indicator diagram is calculated in combination with working fluid level iteration and a difference method, and calculation, digital production calculation and liquid level calculation of the oil well working fluid level are completed. According to the method, the precision and accuracy of the indicator diagram can be improved, and a powerful guarantee is provided for oil well digital technology and scientific management development.

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 invention discloses a foam-containing slurry liquid level measuring device and a using method thereof, and relates to the technical field of liquid level measurement, the foam-containing slurry liquid level measuring device specifically comprises a range finder body and a liquid storage tank, a defoaming cylinder located below the range finder body is fixedly installed in the liquid storage tank, and a counterweight buoy is movably installed in the defoaming cylinder; and a lower mounting plate positioned above the liquid storage tank is movably mounted at the lower end of the range finder body. Through cooperation of the range finder body, the liquid storage tank, the defoaming cylinder, the counterweight buoy, a lower mounting plate, an upper mounting plate and a spring clamping piece, the counterweight buoy moves in the defoaming cylinder, so that the defoaming cylinder eliminates foam in foam-containing slurry, signals of the range finder body are in contact with the counterweight buoy, and the foam in the foam-containing slurry is eliminated. Meanwhile, the elastic clamping piece is adopted to adjust the distance between the upper mounting plate and the lower mounting plate, so that the upper mounting plate and the lower mounting plate can be suitable for mounting range finder bodies with different sizes.

The invention belongs to the technical field of molten salt heat storage tank liquid level measurement, and discloses a device for measuring the liquid level height of a molten salt heat storage tank and a working method of the device. According to the device for measuring the liquid level height of the molten salt heat storage tank, an installation block is used for being installed on the top of the molten salt heat storage tank with the liquid level height to be measured, a distance measuring device is integrally arranged in the installation block, and the distance measuring device comprises a laser distance measuring unit and a microwave radar distance measuring unit; the rail rod is used for being vertically installed in a fused salt heat storage tank to be subjected to liquid level height measurement. The floating disc is used for being arranged in a fused salt heat storage tank to be subjected to liquid level height measurement and is slidably installed on the rail rod. The dynamic air curtain protection assembly is used for forming a protection air curtain near the distance measuring device in the liquid level height measuring process; and the operation output unit is used for calculating and outputting the liquid level height value of the molten salt heat storage tank by adopting a weighted average algorithm. According to the method, the measurement robustness and the measurement accuracy can be remarkably improved.

The invention discloses a liquid level measuring device suitable for a urea solution storage tank, and belongs to the field of liquid level measurement, the liquid level measuring device comprises a measuring tube, a magnetic turning plate mounted on the measuring tube, and a magnetic floater slidably arranged in the measuring tube and used for being matched with the magnetic turning plate; a first cleaning mechanism is arranged on the measuring tube and comprises driving discs arranged at the top and the bottom in the measuring tube, a scraper plate fixedly connected between the two driving discs and abutting against the inner wall of the measuring tube, and a driving piece used for driving the two driving discs to rotate synchronously. Through the design of the first cleaning mechanism, the driving piece drives the two driving discs and the scraper to rotate synchronously, the scraper rotates circumferentially along the inner wall of the measuring pipe to effectively scrape crystals on the inner wall of the measuring pipe, the situation that the crystals cause the caliber of the measuring pipe to be reduced, and normal movement of a magnetic floater is affected is avoided, and the liquid level measuring accuracy is improved; the device is not only suitable for a urea solution storage tank, but also can be used for measuring the liquid level of other easy-to-crystallize liquid.

The invention provides a liquid level sensor and equipment with a liquid container, and relates to the technical field of liquid level measurement, and the liquid level sensor comprises a main body structure and a detection structure. The main body structure comprises a closed cavity along a first direction and a plurality of reflecting side surfaces. The detection structure is located in the closed cavity and comprises a circuit board and a light emitting element and a light receiving element which are located on the two opposite sides of the circuit board. The detection light beam can be sequentially reflected to the light receiving element through the reflecting side face, and the transmission direction of the detection light beam transmitted to the light receiving element is parallel to the light-in direction of the light receiving element or has a small included angle with the light-in direction of the light receiving element. According to the liquid level sensor, light isolation of the light emitting element and the light receiving element can be achieved on the basis of the lightproof circuit board, light beam transmission between the light emitting element and the light receiving element is achieved on the basis of the multiple reflection side faces of the main body structure, the structure is simplified, and precision is high.

The invention discloses an all-optical-fiber liquid level measuring system and method based on double-optical-comb phase decoupling and self-adaptive compensation, and the system comprises a double-optical-comb light source module, an optical fiber coupling module, a signal collection and processing system, a self-adaptive compensation module, a measuring arm and a reference arm. The optical fiber coupling module comprises a polarization-maintaining optical fiber beam splitter and a polarization-maintaining optical fiber beam combiner; the signal acquisition and processing system comprises a balance detector, a lock-in amplifier and an upper computer which are sequentially connected from front to back, and the lock-in amplifier is connected with a self-adaptive compensation module; the double-optical-comb light source module is connected with the measuring arm and the reference arm through the polarization-maintaining optical fiber beam splitter, and the measuring arm and the reference arm are connected with the balance detector through the polarization-maintaining optical fiber beam combiner. According to the invention, interference signal intensity and phase information are combined, the problem of reflectivity difference between transparent liquid and opaque liquid is solved, phase noise caused by environmental disturbance is eliminated, and the measurement stability is improved. According to the invention, non-contact, real-time and high-resolution measurement of the height of the liquid level is realized, especially measurement in a high-pressure, high-temperature or corrosive environment is realized, and the application range is expanded.

The utility model discloses a novel side-mounted magnetic liquid level metering device, which relates to the technical field of liquid level metering devices and comprises a shell, a mounting mechanism is arranged on the shell, the shell is mounted on an external container through the mounting mechanism, a cavity is arranged in the shell, a liquid inlet pipe communicated with the cavity is fixed at the bottom of the shell, and a liquid outlet pipe communicated with the cavity is fixed at the bottom of the shell. According to the novel side-mounted magnetic liquid level metering device, after liquid level metering is completed, the end opening of the branch pipe is plugged through the sealing plug, the miniature air pump works and injects air into the cavity, the air pressure in the cavity rises, liquid in the cavity is pressed, the liquid in the cavity is separated from the branch pipe, the liquid in the cavity is separated from the branch pipe, and the liquid in the cavity is separated from the branch pipe. The liquid in the cavity flows back to the external container through the liquid inlet pipe under the action of air pressure, so that after measurement is completed, the liquid in the cavity can automatically flow back to the container to be measured, and the liquid is prevented from being wasted.

The utility model discloses a floating ball type liquid level measuring device, and relates to the technical field of liquid level measuring devices. The utility model provides a floating ball type liquid level measuring device which comprises an inserting rod, two conducting rods extending in the axial direction of the inserting rod are arranged in the inserting rod, a conducting connecting block is arranged between the two conducting rods, and a first magnetic attraction piece is arranged on the conducting connecting block; a floating ball assembly; the first floating ball and the second floating ball are provided with oppositely-arranged clamping grooves, and the two clamping grooves are buckled to form a limiting groove used for being matched with the inserting rod. The floating ball assembly further comprises connecting units arranged on the two sides of the limiting groove, each connecting unit comprises a connecting shaft, the connecting shafts are sleeved with second magnetic attraction pieces used for being matched with the first magnetic attraction pieces, the first ends of the connecting shafts are hinged to one of the first floating ball and the second floating ball, and the other floating ball is provided with a spring bolt. The second end of the connecting shaft is provided with a locking piece, and the locking piece is provided with a lock hole used for being matched with the spring bolt to form a limiting structure.

The invention relates to the technical field of high-pressure gas cylinder detection. The high-pressure gas cylinder residual deformation rate detection device comprises a mounting seat, a water tank is arranged on the mounting seat, a liquid level measuring water jacket is arranged on one side of the water tank in a communicating mode, a water injection pipe is arranged on the other side of the water tank, a supporting seat is arranged on the water tank, a supporting rod is arranged on the supporting seat, and a pressure sensor is arranged on the supporting rod. A limiting assembly and an adjusting assembly are arranged on the supporting rod, a fixing assembly is arranged on the supporting seat, a lifting seat is arranged on the mounting seat, a discharging plate is arranged on one side of the lifting seat, a lifting assembly is arranged on the lifting seat, and a liquid level detecting assembly is arranged on the liquid level measuring water jacket. The gas cylinder detection device has the advantages that the gas cylinder to be detected can be conveniently placed in the water tank, the labor intensity of workers is reduced, the working efficiency is improved, compared with a traditional detection method, equipment needed during measurement and the measurement process are simplified, and the detection efficiency and the accuracy of a measurement result are improved.

The invention belongs to the technical field of liquid level measurement, and particularly relates to a liquid level measuring device capable of adjusting a measuring angle, the liquid level measuring device comprises a handle, a fixed seat, a turntable and a drill rod, one end of the handle is connected with the fixed seat, the turntable is rotatably arranged in the fixed seat, and the drill rod is arranged on one side of the turntable in an extending manner; a first through hole and a second through hole are formed in the side wall of the rotary disc in a penetrating mode, and a fixed angle b degrees is formed between the first through hole and the second through hole. A third through hole and a fourth through hole are formed in the side wall of the fixing base in a penetrating mode, a fixing angle c degrees is formed between the third through hole and the fourth through hole, and b is smaller than c. When the first through hole and the third through hole directly face each other, the second through hole and the fourth through hole are staggered, and a bolt assembly is inserted into the first through hole and the third through hole for fixation. When the second through hole and the fourth through hole are right opposite, the first through hole and the third through hole are staggered, and a plug pin assembly is inserted into the second through hole and the fourth through hole for fixing. The device can conveniently adjust and measure the liquid level of electrolyte and molten aluminum in the electrolytic cell at a small angle according to the actual condition of the electrolytic cell.

The invention relates to a vibration sensor (10) for level measurement and a method (60) for operating a vibration sensor (10). The vibration sensor (10) comprises at least one drive element (12), one oscillating element (14), a transmission assembly (16) coupling the drive element (12) and the oscillating element (14), and a control device (18). The control device (18) is configured to control the drive element (12) such that impulse energy (41) can be generated by the drive element (12) and transmitted by the transmission assembly (16) to the oscillating element (14), causing the oscillating element (14) to vibrate.

The present application relates to a kind of boiler continuous blowdown flow measuring device and measuring method, for the measurement of continuous blowdown expansion vessel flow, including remote liquid level measuring cylinder and in-place liquid level measuring cylinder;Remote liquid level measuring cylinder is equipped with measuring device and control device;Measuring device includes remote liquid level measuring cylinder measurement result display instrument and remote liquid level measuring cylinder measurement 0 water level display instrument;Remote liquid level measuring cylinder top is equipped with air release valve;Air release valve includes valve body joint, valve body, sealing umbrella, guide column and sealing column;Continuous blowdown expansion vessel is equipped with drain pipeline assembly, drain pipeline assembly includes drain valve, drain pipe and water test valve;A kind of boiler continuous blowdown flow measuring method, including measurement preparation, the determination of measurement start time, measurement end time determination, calculate blowdown amount etc.The beneficial effects of the present application are that, by the measuring device and the measuring method provided, the flow of boiler continuous blowdown can be accurately calculated, and then it is judged whether the boiler is normal.

The invention relates to an intraocular lens continuous feeding device and an intraocular lens continuous preparation method, the intraocular lens continuous feeding device comprises a melting furnace, a growth furnace, a conveying pipe communicating the melting furnace and the growth furnace, and a controller, the top of the melting furnace is provided with a feeding part, and the feeding part is provided with an on-off valve; a liquid level measuring structure is arranged in the growth furnace, a lifting rod is rotationally arranged at the top of the growth furnace, and the cross section of an inner cavity of the growth furnace is circular; the bottoms of the inner cavity of the melting furnace and the inner cavity of the growing furnace are arranged in an equal plane, the conveying pipe horizontally extends and is connected to the bottoms of the side walls of the melting furnace and the growing furnace, so that a communicating vessel structure is formed inside the melting furnace and the growing furnace, and the extending direction of the conveying pipe is tangent to the outmost outline of the inner cavity of the growing furnace, so that mixed liquid enters the growing furnace in the tangential direction; and the controller is in sampling connection with the liquid level measuring structure and is in control connection with the on-off valve. The stability of the molten liquid in the lifting growth furnace is kept, and the purpose of industrially and continuously growing high-quality large-size crystals is achieved.