301 results about "Liquid level measurement" patented technology

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 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 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 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 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 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 application provides a kind of detection method and system for liquid nitrogen liquid level, it is related to liquid level measurement technical field, including with the first data information of liquid nitrogen environment that is obtained by real-time acquisition using pre-set target sensor;Based on the first data information and the evaporation characteristics of liquid nitrogen in the present environment, after obtaining the empirical equation corresponding to the relationship between liquid nitrogen level and time, temperature, the target state equation and observation equation are constructed;Introduce Kalman filtering algorithm, and combine the target state equation and observation equation to estimate the real-time liquid level state of liquid nitrogen.Combined with Kalman filtering algorithm, the corresponding evaporation characteristics of the environment based on the storage of liquid nitrogen is used to obtain the empirical equation corresponding to the relationship between liquid nitrogen level and time, temperature, and then the sensor liquid level meter is used to realize the accurate estimation of the continuous real-time liquid level state of liquid nitrogen.

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.

The utility model relates to a zinc powder stirring device. The device comprises a tank body, a stirring mechanism and a liquid level measuring mechanism, and the stirring mechanism is installed on the tank body and used for stirring and mixing materials in the tank body; the liquid level measuring mechanism comprises a mounting frame, a roller, a rope, a balancing weight and a floating ball, the mounting frame is fixedly arranged at the top of the tank body, the roller is rotationally mounted on the mounting frame, the rope bypasses the roller, one end of the rope is connected with the floating ball located in the tank body, and the other end of the rope is connected with the balancing weight located outside the tank body. According to the scheme, the liquid level height in the stirring tank can be monitored in real time through the liquid level measuring mechanism, an observation window does not need to be arranged, and convenience and practicability are achieved.

This application relates to the field of liquid level measurement technology, specifically to a high-precision automatic water level monitoring method and system. The method includes: setting measurement points in the monitored water area; analyzing the overall distribution characteristics of water level values ​​within a preset time window; determining the fluctuation frequency of each measurement point; combining the water surface fluctuations of all measurement points within the preset time window to obtain a fluctuation stability index; screening the measurement points to obtain valid measurement points; analyzing the dispersion of water level values ​​in the current time window of each valid measurement point; determining the fusion weight of each valid measurement point; using the fusion weight to weight representative water level values ​​to obtain a fused water level value; and correcting the fused water level value through measurement uncertainty to obtain the final water level measurement result. This application aims to improve the accuracy of water level measurement.

The application provides a liquid level measurement method and device, a storage medium and a computer device. The method comprises the following steps: collecting a first liquid level data set of a liquid level object to be detected by a plurality of liquid level sensors; performing outlier filtering on the first liquid level data set to obtain a second liquid level data set from which abnormal values are removed; obtaining a highest frequency liquid level value, a liquid level median value and a liquid level average value from the second liquid level data set; and obtaining an actual liquid level value of the liquid level object to be detected according to the highest frequency liquid level value, the liquid level median value, the liquid level average value and a preset liquid level value judgment mode. The application can accurately measure the liquid level value of the liquid level object to be detected in a dynamic state.

The utility model provides a heat dissipation type radar liquid level meter which comprises a heat dissipation type radar liquid level meter body, a numerical value displayer and a flange plate, the numerical value displayer is fixedly installed at the top of the heat dissipation type radar liquid level meter body, and the flange plate is fixedly installed at the bottom of the heat dissipation type radar liquid level meter body. The bottom of the outer ring face of the numerical value displayer is fixedly sleeved with a supporting ring, the portion, located above the supporting ring, of the outer portion of the numerical value displayer is sleeved with a dustproof cover, and a numerical value display screen is installed on the top of the numerical value displayer. Compared with the prior art, the device has the advantages that measured numerical values on the numerical value display screen can be amplified and displayed through an inner convex lens of an adjusting cylinder in the amplification display mechanism, so that recording personnel can conveniently stand at a distance to record, and the phenomenon that working personnel are scalded by high temperature of liquid steam is effectively reduced; the safe distance between a recorder and the liquid level is increased, and the radar liquid level measurement data recording safety is improved.

A dispensing machine (1) and a method for determining the liquid level in the container of the dispensing machine. The dispensing machine includes: - a movable platform, such as a turntable (5); - a plurality of dispensing units (8) located on the platform, each dispensing unit including a container (4), a pump (9), and a valve (10); and - a vibration sensor (27), such as a microphone. The dispensing machine also includes an impact element (26). The platform is movable to position a selected dispensing unit (4) at a test location, wherein the dispensing unit (8) is within reach of the impact element (26).

The application discloses a LNG storage tank radar liquid level temperature compensation method and system based on gas phase temperature distribution, a medium and a program product, and relates to the technical field of liquid level measurement. In view of the problem that the measurement error is caused by regarding the electromagnetic wave propagation speed as a constant in the existing radar liquid level measurement, a gas phase temperature distribution model along the height direction is established, the electromagnetic wave propagation speed in the gas phase is dynamically corrected by combining the gas state equation and the electromagnetic wave propagation theory, and the propagation time is calculated by path integration, so that the inversion calculation of the liquid level height is realized. The application utilizes the liquid phase temperature stability and the gas phase top temperature measurement value to construct a gas phase temperature distribution function, further calculates the gas density, the dielectric constant and the propagation speed, and realizes the compensation of the liquid level measurement result. Simulation and actual rapid liquid discharge working condition verification show that the method can effectively reduce the liquid level measurement error, improve the measurement accuracy and reliability, and is suitable for the liquid level measurement scene of low-temperature storage tanks such as liquefied natural gas.

The utility model discloses a liquid level measuring device based on a temperature sensor. The liquid level measuring device comprises at least one liquid level measuring ruler and a data recording and processing device, the liquid level measuring scale comprises a substrate, at least one thermocouple anode, a thermocouple cathode, a data transmission male port and a horizontal adjusting device, the thermocouple anode and the thermocouple cathode are arranged on the surface of the substrate; the thermocouple anode and the thermocouple cathode are connected with the data transmission male port; the horizontal adjusting device is used for enabling the liquid level measuring scale to be kept perpendicular to the measured liquid level. The data recording and processing device is detachably connected with the data transmission male port and is used for recording data measured by the liquid level measurement value and sending the data to the outside at the same time; the data recording and processing device comprises a data recording and transmitting device and a data analyzing and processing device; and the data recording and transmitting device is wirelessly connected with the data analyzing and processing device.

The new energy automobile high-strength steel precision pulse machining equipment comprises a base, a pulse machining mechanism is fixedly connected to the rear portion of the base, a working fluid storage box is fixedly connected to the upper face of the base, a hydraulic telescopic rod is installed at the bottom in the working fluid storage box in an embedded mode, and a clamp fixing seat is fixedly connected to the upper end of the hydraulic telescopic rod; a mounting frame is fixedly connected to one corner in the working liquid storage box, a connecting through hole is formed in the mounting frame, a liquid level measuring mechanism is slidably mounted in the connecting through hole, the liquid level measuring mechanism comprises a floating plate and a first touch switch, and the first touch switch is fixedly connected to the mounting frame. The hydraulic telescopic rod is started to drive the clamp fixing base to move upwards, the clamp fixing base moves upwards to drive the clamp to move upwards, the clamp is made to float out of the working solution, at the moment, the hands of an operator do not need to be soaked in the working solution to clamp a workpiece, contact between the operator and the working solution is effectively reduced, and the body of the operator is prevented from being injured.

The utility model relates to the technical field of desulfurization, and provides a desulfurization system liquid level adjusting device which comprises a desulfurization tower, an air inlet is formed in the side wall of the desulfurization tower, an air outlet is formed in the top of the desulfurization tower, a spraying structure is arranged in the desulfurization tower, and a liquid level column is arranged on the outer wall of the desulfurization tower. The bottom of the liquid level column and the bottom of the desulfurizing tower are located on the same plane, the side face of the liquid level column is communicated with the interior of the desulfurizing tower, the liquid level column is provided with a transparent window, the desulfurizing tower is provided with a liquid supplementing pipeline, the output end of the liquid supplementing pipeline is connected with a spraying structure, a slurry discharging pipeline is arranged at the bottom of the desulfurizing tower, and the desulfurizing tower is further provided with a liquid level control device. According to the technical scheme, the problems that in the prior art, an electronic sensor is prone to slurry corrosion and electromagnetic interference, the accuracy of liquid level measurement is reduced, an operator cannot directly observe the liquid level in the desulfurizing tower, and accurate information cannot be obtained in time when the sensor breaks down or the liquid level needs to be quickly confirmed are solved.

The application relates to the technical field of new energy vehicles and vehicle detection equipment, and discloses a portable device for heavy truck axle housing liquid level measurement, which is suitable for electric drive axle and traditional drive axle. The device comprises a shell support structure, an electronic control assembly, a posture adjusting execution mechanism, a quick locking connection mechanism and a liquid level measurement assembly; the shell support structure is used for supporting the device and stretching and retracting the measurement assembly; the electronic control assembly is used for power supply, control and result display; the posture adjusting execution mechanism is used for adjusting the posture of the measurement assembly to keep it vertical; the quick locking connection mechanism is used for quickly fixing the device and the oil filling hole of the axle housing; and the liquid level measurement assembly realizes liquid level detection by cooperating a magnetic float and a Hall sensor. The application takes into account the application requirements of the electric drive axle and the traditional drive axle, and can especially meet the requirements of the electric drive axle on liquid level detection precision and reliability.

The utility model provides a slag rake cooling water temperature and liquid level self-adjusting device, which relates to the technical field of steelmaking converters and comprises a cold water inlet pipe leading to the inside of a cooling water tank and a hot water discharge pipe arranged below the side wall of the cooling water tank and communicated with the inside of the cooling water tank, a water inlet valve is arranged on the cold water inlet pipe, and a water discharge valve is arranged on the hot water discharge pipe. The first support is provided with a liquid level sensor, the second support is provided with a thermodetector, the outer wall of the cooling water pool is provided with a control box, and the water inlet valve, the water drainage valve, the liquid level sensor and the thermodetector are all electrically connected with the control box. The cold water inlet pipe is provided with the water inlet valve, the hot water discharge pipe is provided with the water discharge valve, the liquid level sensor is arranged to measure the liquid level, and the thermometer is arranged to measure the temperature of pool water, so that the water inlet valve and the water discharge valve can be automatically controlled by the control box to act, and automatic cold water filling and hot water discharge are realized; and the water level and the water temperature in the cooling water tank are kept stable.

The utility model discloses a liquid level measuring device which comprises a liquid level meter body and a liquid level meter probe. And the cleaning mechanism is arranged on the liquidometer body and can suck the medium in the container and clean the probe of the liquidometer by using the medium. According to the liquid level meter, the cleaning mechanism is arranged, the medium in the container is used for cleaning the probe of the liquid level meter, scum, sediment or solidified matter attached to the probe can be effectively removed, measurement errors caused by medium adhesion are avoided, and therefore the accuracy of liquid level measurement is remarkably improved.

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.

This invention designs a hot water level detection device for heating systems, belonging to the field of water level detection technology. The device includes a water level sensing unit, a temperature sensing array, a vibration sensing unit, and a data processing module. The water level sensing unit is installed on the top of the water storage device, emitting and receiving ultrasonic waves and measuring the round-trip time. The temperature sensing array includes two temperature sensors respectively installed at the top and bottom of the water storage device to acquire information on the vertical temperature distribution of the hot water. The vibration sensing unit is installed on the wall of the water storage device or on the heating pipe to collect vibration signals. The data processing module includes a temperature judgment unit, a sound velocity correction unit, a feature extraction unit, and a water level correction unit. This invention eliminates the influence of temperature stratification on sound velocity calculation through temperature gradient adaptive correction, and suppresses the interference of dynamic disturbances on water level measurement through vibration feature extraction and adaptive filtering, achieving accurate and stable hot water level monitoring under the complex operating conditions of heating systems.

The invention relates to the technical field of storage tank liquid level measurement, in particular to a storage tank liquid level measurement method. Temperature correction is performed on the standard relative dielectric constant of the electromagnetic wave in each gas component through the acquired reference temperature in the tank, the real-time propagation wave velocity of the electromagnetic wave is calculated in combination with the volume ratio of each gas component, and the height above the liquid level from the tank top to the liquid level is acquired according to the real-time propagation wave velocity. Calculating the initial liquid level height of the oil storage tank according to the designed internal height of the oil storage tank, calculating the internal oil capacity of the oil storage tank according to the initial liquid level height, and calculating the internal oil capacity of the oil storage tank according to the slight change influence degree of the tank body corresponding to the reference temperature; and the oil capacity in the tank is slightly changed and corrected, and the final oil storage capacity is output, so that the final oil storage capacity measurement result is closer to an actual value, and the reliability of trade settlement and production scheduling is improved.

The utility model provides a novel steel bottle liquid level detection device, including steel bottle, the top of steel bottle is provided with carrier gas inlet, pressure balance exhaust port and detection subassembly installation mouth, be provided with the flow guide detection tube in the steel bottle, be provided with liquid level sensor in the flow guide detection tube, and liquid level sensor passes through installation mouth electrically external signal receiver, the one end of flow guide detection tube towards installation mouth is first open end, the other end is second open end, and there is a certain distance between first open end and the inner top of steel bottle, and the edge of second open end is fixedly connected with the inner bottom of steel bottle. The utility model discloses a steel bottle liquid level detection device can still keep the measuring accuracy under the bubbling disturbance working condition, effectively solve the liquid level measurement problem of dynamic working condition, realize the real -time monitoring and early warning of the precursor balance, significantly improve the deposition process raw material utilization, provide reliable material monitoring guarantee for the thin film deposition quality of semiconductor manufacturing field, especially suitable for the precision manufacturing environment of strict requirement.