713results about "Level indicators by physical variable measurement" patented technology

A method and apparatus are provided. An aerosol-generating device includes a chamber configured to store a liquid aerosol-generating material, a main body including a partition wall facing the chamber, a conductive member provided on one surface of the chamber facing the partition wall, and a level sensor configured to sense an amount of the liquid aerosol-generating material stored in the chamber, in which the level sensor is configured to sense the amount of the liquid aerosol-generating material by applying current to the conductive member and measuring a voltage value that varies depending on a capacity of the liquid aerosol-generating material.

The invention discloses a gradient thermocouple liquid level real-time detector, and relates to the technical field of liquid level detection, an integrated gradient thermocouple probe rod structure is adopted, a plurality of groups of thermocouple nodes are integrated on a single corrosion-resistant alloy integrated gradient thermocouple probe rod according to a preset interval through a special process, and a continuous temperature gradient sensitive area is formed. A high-precision signal processing circuit is embedded in the integrated gradient thermocouple probe rod, the temperature difference potential of each node is collected in real time, the liquid level height is calculated based on a dynamic temperature field modeling algorithm, and full-scale continuous measurement is achieved. Gradient node distributed layout is created for the first time, and a blind area of traditional point type measurement is eliminated; a self-adaptive temperature compensation mechanism is developed, and medium layering and boiling interference are overcome; the integrated gradient thermocouple probe rod adopts vacuum sealing and a nanometer heat insulation coating, and can resist a high temperature of 600 DEG C and a high pressure environment of 40 MPa. The device has millimeter-level measurement precision and millisecond-level dynamic response capability, does not need to move parts or external radiation sources, and remarkably improves the reliability, safety and installation convenience of liquid level monitoring of industrial reaction kettles and high-pressure boilers under extreme working conditions.

The invention discloses an intelligent water level detection method, system and device for a water conservancy project and a medium, and belongs to the field of detection. The device is suitable for a surge water flow environment, and through the deployed dual-working-mode electrode, reset signals are circularly collected and filtered to obtain a pure target voltage sequence. Through difference calculation and threshold comparison, a continuous voltage sequence is converted into a discrete voltage jump event sequence containing time, direction and amplitude. The occurrence frequency, the interval duration and the amplitude statistical value of the event sequence are calculated through a sliding time window, and a time domain feature vector sequence is generated; the feature vector sequence is input into a pre-trained hidden Markov model to decode a non-contact, surge or continuous contact state sequence of each electrode. Finally, the state sequence of the multiple electrodes is analyzed, the final reliable water level monitoring information is determined by confirming the continuous and stable contact state, the real water level and surge interference are effectively distinguished, and the reliability and accuracy of the water level detection result can be improved.

The invention discloses a three-mode switching type sewage plant biochemical pool inspection robot control system, and belongs to the technical field of robot inspection, the three-mode switching type sewage plant biochemical pool inspection robot control system comprises a composite moving system, an integrated crawler walking module, a buoy module and a propeller module, and the three-mode switching type sewage plant biochemical pool inspection robot control system is used for controlling and switching walking modes of an inspection robot; the mode switching triggering mechanism is used for switching the composite moving system to the crawler walking module, the buoy module or the propeller module according to the water depth; the multi-source heterogeneous sensor monitoring module is used for detecting environmental data in real time through a multi-source heterogeneous sensor; and the path planning module is used for fusing monitoring data of the multi-source heterogeneous sensor, optimizing a global path by adopting an improved ant colony algorithm, and carrying out dynamic obstacle avoidance in combination with a D * Lite algorithm. Switching of multiple propelling modes is supported, and limitation of a single moving mode of a traditional robot is broken through; and meanwhile, monitoring data of heterogeneous sensors are aligned, and dynamic obstacle avoidance is performed by adopting an improved ant colony algorithm in combination with a D * Lite algorithm, so that the accuracy of path planning is improved.

A powder dispensing apparatus having an elongate wedge-shaped hopper including one or more fluidized plates is described. The powder dispensing apparatus can be positioned above a pair of calender rolls to distribute a powder, such as a dry electrode material onto the calender rolls. Such fluidized wedge shaped hopper advantageously allows for an accurate and / or controlled rate of powder distribution across or substantially across the length of a calender roll.

The invention relates to the field of guide bearing bush control, in particular to a signal processing system and method for guide bearing bush clearance automatic adjustment, and the system comprises a clearance metering module, a model boundary module, a fault learning module, a clearance adjustment module and an oil film lubrication module, the model boundary module is used for establishing a dynamic pressure lubrication model of the guide bearing bush and solving the gap of the guide bearing bush, the fault learning module is used for determining the gap adjustment amount, the gap adjustment module is used for adjusting gap distribution, and the oil film lubrication module is used for adjusting lubricating oil injection. And fault identification and automatic fault-tolerant adjustment are carried out, so that mechanical vibration of the bearing is reduced, operation stability of equipment is guaranteed, abnormal bearing bush gaps are avoided, mechanical efficiency of the bearing is improved, invalid power loss is reduced, service life of the equipment is prolonged, thickness and pressure distribution of a lubricating oil film are improved, and performance of bearing turbine equipment is improved.

The invention relates to the technical field of detection and calibration, and particularly discloses an efficient flowmeter detection and calibration method based on gravitational potential energy, which comprises the following steps: S1, building a detection and calibration device which comprises a height-adjustable water tank, a capacitance liquid level sensing unit, a water inlet control unit, a flow regulation and calibration unit and a control and display unit; s2, liquid level signals in the height-adjustable water tank are collected in real time through a capacitance liquid level sensing unit and fed back to a control and display unit, the control and display unit regulates and controls an execution element of a water inlet control unit, and the liquid level difference in the water tank is stably controlled within a preset threshold value; and S3, the installation height of the height-adjustable water tank is adjusted to change the gravitational potential energy of the fluid. The method effectively solves the problems of poor range adaptability, insufficient precision, low efficiency and the like in the existing flowmeter calibration technology, has universality, stability, high precision and high efficiency, and is suitable for flowmeter batch calibration scenes in the fields of industrial production, energy metering and the like.

The invention relates to the technical field of risk analysis, in particular to a water conservancy project risk assessment method based on big data, which comprises the following steps: acquiring deformation and water level signals and converting the signals into a sequence, generating an original monitoring sequence based on a timestamp, identifying a whole process span and intercepting and generating a periodic data set, generating a complete monitoring sequence by using interpolation filling, constructing a water level displacement closed curve, calculating a vector product difference value to obtain a geometric area, calculating an arithmetic mean value to generate a centroid coordinate, obtaining a dissipated energy increase coefficient and a structure permanent deformation cumulant, and generating an evaluation result based on threshold comparison. According to the method, the two-dimensional phase space model is established, the structure response is converted into the closed trajectory curve, the hysteresis loop area and centroid offset are calculated, energy dissipation and deformation accumulation of the structure under cyclic loading are quantitatively represented, abnormal plastic damage is effectively stripped, and early recognition of the potential irreversible damage risk of the structure is achieved.

The present invention relates to an electrostatic spray device comprising: a water tank unit having one open side and accommodating a liquid base solution; an electrode unit, which applies power to the base solution so as to generate a potential difference for droplet formation of the base solution; and a nozzle unit which is provided inside the water tank unit and which discharges the base solution in the droplet form by means of the potential difference, wherein the nozzle unit has a lower portion immersed in the base solution, and thus can autonomously absorb the base solution. Therefore, the present invention can spray micro-droplets by means of electrostatic spraying.

The invention provides a water level measuring device based on a distributed temperature sensor and a high-precision measuring system.The water level measuring device comprises an optical fiber rod, a base, a polygonal rod and a shell, the polygonal rod and the shell are fixed to the base, and a vertical polygonal through hole matched with the polygonal rod in shape is formed in the optical fiber rod; the polygonal rod is inserted into the optical fiber rod to enable the optical fiber rod to be fixed on the base, the bottom of the shell is of a mesh structure, the optical fiber rod is located in the shell, sensing optical fibers of the distributed temperature sensors are wound on the optical fiber rod, and according to the spatial resolution requirement of the water level of accumulated water and the spatial resolution of the sensing optical fibers corresponding to the distributed temperature sensors, the sensing optical fibers are distributed. The winding length of the sensing optical fiber in the corresponding height in the vertical direction of the optical fiber rod is adjusted, and the temperature measurement precision of the distributed temperature sensor is smaller than or equal to the minimum difference value of the air temperature and the accumulated water temperature. The device is passive equipment, is low in energy consumption, has universality and is high in measurement accuracy.

A system and method for measuring or for estimating flow or flowrate of a fluid, including wastewater inflow or infiltration, using non-contact depth-based flow measurement, including: receiving a depth sensor signal from an ultrasonic depth sensor positionable over a manhole channel above an outgoing pipe's crown; receiving a temperature signal from a temperature sensor positionable within the manhole channel; receiving one or more data input signals; calculating a distance to a surface of the fluid based on the received depth sensor signal; and determining a depth of the fluid in the manhole channel based on the calculated distance. Flow velocity may be calculated using Manning's equation or the Hazen-Williams equation, with flow rate subsequently determined using the continuity equation. Alternatively, flow velocity and flow rate may be estimated using a machine learning model trained on simulated or historical time-series data of flow rate, flow velocity, and flow depth, along with pipe attributes, to generate real-time flow estimates based on current and prior flow depth measurements.

The invention discloses an active eddy current excitation thermocouple gradient liquid level detector, relates to the technical field of industrial process detection, and aims to overcome the defects that a traditional thermocouple liquid level meter lags in response in a complex medium, and the measurement precision is limited by heat conduction characteristics. According to the scheme, a fusion mechanism of active eddy current excitation and distributed thermocouple gradient detection is innovatively provided. A miniature magnetofluid driven vortex generator is integrated in a coaxial nested detection rod, so that detected liquid is actively induced to generate directional vortex flow, and a static thermal boundary layer of a medium is broken; meanwhile, multiple stages of thermocouple arrays are precisely arranged in the axial direction, and dynamic temperature gradient jump signals at the liquid-steam interface under eddy current disturbance are captured in real time. The design breaks through the physical limit of passive heat conduction detection, the liquid level resolution is improved to the millimeter level, and the response time is shortened by more than 80%. Experiments show that in a 300 DEG C liquid sodium environment, the system measurement error is less than + / -1.5 mm, which is significantly superior to that of an existing contact type liquid level instrument.

The invention discloses a multi-modal water level monitoring and well lid alarming method based on AI, and the method comprises the steps: arranging a water immersion and triggering alarm terminal of an integrated electrode sensor and a Hall sensor in an open bin of a well lid base, integrating terminal data, image data and environment data, and carrying out the standardization processing, thereby generating a multi-modal fusion feature. And by taking the characteristics as core input, constructing an AI model, and outputting an accumulated water abnormal probability and a well lid jacking probability. In combination with the pipe network topology, historical data and a dynamic threshold value of a digital twin system, the road surface ponding grade and the well lid abnormity reason are accurately judged, and the alarm effectiveness is verified through multi-source credibility fusion. Meanwhile, an alarm result and disposal feedback are synchronized to the digital twin system, and a training data set is updated to iteratively optimize model parameters. According to the method, the hysteresis quality and the false alarm rate of traditional monitoring are effectively reduced, the operation and maintenance efficiency and the emergency response capability of a municipal pipe network are remarkably improved, and reliable technical support is provided for urban inland inundation prevention and control and road safety guarantee.

The invention relates to an impregnation machine resin liquid level intelligent sensing and early warning method. The method comprises the steps that multiple sampling positions are arranged in a resin liquid level area in impregnation machine equipment; performing noise suppression and signal normalization processing on the time domain dielectric signal data set; performing feature classification on the data samples under different working conditions; adopting the historical liquid level response database to construct a multi-working-condition adaptive baseline model; a standardized time domain dielectric signal sequence obtained through actual sampling is input into the multi-working-condition self-adaptive baseline model, and a liquid level local abnormal trend signal is obtained; performing multi-window space-time distribution dynamic imaging processing on the liquid level local abnormal trend signal; inputting the amplitude, continuity and spatial diffusion characteristic parameters of the trend change into a historical false alarm and artifact event characteristic library; and dynamically generating a self-adaptive early warning threshold value for the liquid level abnormal trend signal after the artifacts are removed. According to the invention, high-sensitivity acquisition and dynamic amplification of local electromagnetic response caused by small fluctuation of the resin liquid level can be realized.

A calculation method of karst underground reservoir capacity curve based on hydrogeological parameters, including the following steps: hydrogeological exploration, determination of karst underground water reservoirs scope, determination of water storage space, determination of relevant hydrogeological parameters based on hydrogeological tests, and underground reservoir capacity analysis. The invention uses the unit water permeability and the borehole line karst rate that are very easily obtained through the borehole pressure (injection) water test and combines it with a small amount of water pumping test, thereby obtaining a correlation function relationship through regression analysis between the specific yield and the karst rate that are difficult to obtain and the unit water permeability or the permeability coefficient; the underground storage capacity at the corresponding elevation is calculated according to the specific yield or the karst rate and the underground storage capacity curve is obtained, which can improve accuracy and reduce errors.

The embodiment of the invention discloses an ore drawing machine stockpiling detection method and system based on semantic segmentation. The method comprises the following steps: an image acquisition step: acquiring an ore drawing field image in real time; a semantic segmentation inference step: carrying out semantic segmentation on the ore drawing site image by adopting a pre-trained semantic segmentation deep learning model, and extracting a mineral aggregate contour; and a decision logic step: loading a preset warning line at a preset position of the ore drawing site image, and sending a shutdown signal if an intersection exists between the mineral aggregate contour and the warning line or the contour line is located above the warning line. According to the method, the core difficulties of dust interference, illumination fluctuation, color approaching of ores and carriages, difficulty in unbalance loading detection and the like in a mine ore drawing scene are accurately solved. And finally, high-precision and high-robustness detection under a complex working condition is realized, and the automatic control requirement of an intelligent mine is completely met.

The utility model discloses an under-tank measuring and sampling device and an automatic measuring and sampling storage tank, and relates to the technical field of storage tank sampling technology, the device comprises a sampling part and a measuring control pay-off part, the measurement control pay-off part comprises a distance measuring line, a pay-off distance measuring device and an oil-water interface detection device, the distance measuring line is connected with the pay-off distance measuring device, and the oil-water interface detection device is connected with the distance measuring line; the sampling part comprises a sampling pipe and a sampling pump, the sampling pipe is connected with the sampling pump, and the end of the sampling pipe is connected with the end of the distance measuring line through a traction balance weight. The paying-off distance measuring device is used for taking up and paying off the distance measuring line, the distance measuring line moves together through the measuring sampling pipe connected with the traction balance weight, the oil-water interface measuring task can be accurately completed at a time in cooperation with a Hall current sensor of the oil-water interface detecting device, a sampling pump is made to accurately sample through a sampling pipe, and the defects in the prior art are overcome; and the working efficiency is 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 kettle comprises a kettle body and a kettle cover, a PCB used for detecting the liquid level is arranged outside the side wall of the kettle body, the PCB comprises a base plate and a plurality of electrode plates installed on the base plate, the electrode plates are electrically connected to a main control module, the electrode plates are arranged on the base plate at intervals to form a water level detection area, and the water level detection area is connected with the water level detection area. The water level detection area comprises a low water level detection area located at the bottom of the base plate, a plurality of first electrode plates and second electrode plates arranged on one sides of the first electrode plates are arranged in the low water level detection area, and the detection height of the second electrode plates is larger than that of the first electrode plates. The water level detection area comprises the low water level detection area and is used for meeting different low water level detection requirements under various working conditions, and meanwhile real-time water level signals are calibrated through self-capacitance and mutual capacitance detection of the first electrode plate and the second electrode plate in the low water level detection area. The precision of water level detection is improved.

A refrigerator includes: a body including a storage compartment; a door that opens or closes the storage compartment and includes a dispenser; a water tank case disposed in the door; a water tank separably mounted in the water tank case; a water level sensor configured to sense a water level inside the water tank when the water tank is mounted in the water tank case; and a water tank valve configured to guide water supplied from a water supply source to the dispenser or the water tank, and to prevent water from being supplied to the water tank when the water level sensor senses that a certain amount of water is stored in the water tank.

The invention discloses a vibration sensor with a mechanically oscillating unit (1), a housing (3), and a transducer device (2) comprising a transmitter component (20) and a receiver component (21), and bounded at its end face by two insulating disks (23). Of at least three contact electrodes (9, E+, S+, GND1, GND2, GND), two serve to transmit the excitation and reception signals. A third contact electrode (GND1, GND2, GND) serves to connect to a ground potential or the housing (3). Each contact electrode (9, E+, S+, GND1, GND2, GND) has a base (90) and a contact tab (91). The base (90) is designed as a flat disk with a crescent-shaped outer contour (92), the outer contour (92) consisting of a partial circular contour (93) and an inwardly projecting, smoothly sloping recessed section (94).

The invention discloses an accurate liquid level testing device for a storage tank in a boiling state of a low-temperature medium, which is characterized by comprising a temperature measuring bracket, a platinum resistance sensor, a low-temperature cabin-penetrating flange, a fixing device and testing equipment, the temperature measuring bracket is connected with the fixing device; and the platinum resistance sensor is connected with the temperature measuring bracket and is used for measuring the temperature in the storage tank. The low-temperature cabin-penetrating flange is connected with the fixing device; the test equipment is connected with the platinum resistance sensor through the low-temperature test cable and the low-temperature cabin-penetrating flange; in addition, the invention further discloses a using method of the accurate liquid level testing device under the boiling state of the low-temperature medium of the storage tank. Test data are reliable and accurate, and dynamic liquid level test can be carried out on the filling process of the aerospace low-temperature storage tank, so that the filling process is safely carried out; meanwhile, the testing device is simple and practical, temperature distribution data of the low-temperature storage tank in the radial direction in the boiling state of the low-temperature medium can be obtained, and a foundation is laid for subsequent optimization design.

The invention discloses a desktop type water bath high-low temperature exchange device capable of automatically replenishing water, which relates to the field of laboratory test equipment and comprises a high-temperature pool, a low-temperature pool and a sample transfer mechanism arranged between the high-temperature pool and the low-temperature pool, the high-temperature pool and the low-temperature pool are each provided with one automatic water supplementing system, and each automatic water supplementing system comprises a detection unit used for detecting the water level, a controller and a water supplementing execution unit controlled by the controller. According to the automatic water supplementing system, through the synergistic effect of the detection unit, the controller and the water supplementing execution unit, precise closed-loop control over the water level of the high-low-temperature water pool is achieved. The system can monitor the water level change in real time, automatically complete water replenishing operation, ensure that the water level is always maintained in a preset range in the whole experiment process, realize long-time unattended continuous testing, and improve the automation degree and the operation reliability of equipment.

A liquid level sensor can include a circuit board and a thermistor bridge supported by the circuit board comprising a first pair of thermistors and a second pair of thermistors. A heat sink can be coupled to the circuit board proximate the first pair of thermistors and not the second pair of thermistors. A power supply can be configured to provide pulses of electrical current through the thermistor bridge. A controller in communication with the thermistor bridge can be configured to receive a measurement signal from the thermistor bridge output a low product indication when the measurement signal satisfies a predetermined condition.

One or more sensors generate signals that can be used to detect at least one of a volume measurement or a volume flow measurement of plant debris or other material generated by a work machine. The volume measurement can be made in a container that holds the plant debris or other material. The volume measurement and / or the volume flow measurement can be used to characterize a work region covered by the work machine.

The present invention concerns a measuring lance (1) for measuring a position (has) of an air-slag interface (2as) between an atmosphere (4) and a slag layer (2) sitting on top of a molten metal (3), and a position (hsm) of a slag-metal interface (2sm) between the slag layer (2) and the molten metal (3) in a single measurement run, comprising: • a carrier tube (5) extending along an axis (X) between a proximal end (5p) and a distal end (5d) located downstream of the proximal end, • a measuring unit (6) coupled to the distal end (5d) of the carrier tube (5) and configured for passing through the slag layer (2), the measuring unit (6) comprising, o an electric circuit (7) configured for detecting the air-slag interface (2as), o a slag-metal interface detection unit (8) located downstream of the distal end (5d), comprising at least first and second electric measuring terminals (8ta, 8tb), and configured for measuring values of a first material property at the position (hsm) of the slag-metal interface (2sm) between the slag layer (2) and the molten metal (3), and o preferably a sensor unit (9) comprising first and second electric sensor terminals (9ta, 9tb) and configured for measuring values of a second material property of the slag layer (2) and of the molten metal (3), o a cap (10) enclosing the slag-metal interface detection unit (8) and optionally the sensor unit (9), configured for separating the slag-metal interface detection unit (8) from an outer environment.

The utility model relates to an ash level measuring device for an ash bucket of a dust remover, which comprises a box body, an air inlet pipe and an exhaust pipe respectively arranged on two sides of the box body, an ash bucket body arranged at the bottom end of the box body, an ash discharge nozzle arranged at the bottom end of the ash bucket body, supporting legs arranged at four corners of the outer side of the box body, and a driving component arranged on the front side of the ash bucket body. The driving assembly comprises a supporting plate, a driving mechanism, a limiting rod, a threaded rod, a first sliding sleeve, a supporting rod, a second sliding sleeve, a connecting rod and a bevel gear. A vibration assembly is arranged on one side of the first sliding sleeve. According to the utility model, the vibrating mechanism is matched with the striking steel ball and the sensor, so that the vibrating mechanism can transmit the vibration frequency generated during striking to the frequency spectrum detector through the sensor by striking the ash bucket body, and the frequency spectrum of the ash bucket can be detected according to different amounts of accumulated ash in the ash bucket body and different fed-back striking frequencies. Therefore, the ash storage amount in the ash bucket body is judged.

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.