183 results about "Liquid height" patented technology

An anaerobic digester system has a vertically upright vessel, a matrix arranged in the vessel supporting a microorganism biomass thereon, an input for supplying an input slurry of liquid and suspended solids at an upper portion of the vessel above the matrix, a gas output at the top of the vessel for withdrawing gas generated by anaerobic digestion of solids, and an effluent output at the bottom of the vessel for withdrawing liquid and remaining solids. The vessel has a preferred liquid height to diameter ratio of 2 to 1, and is constructed of inert fiberglass-reinforced plastic coated with a translucent blue gel pigment layer for filtering light at wavelengths that promote biomass cultivation. The matrix is formed as an array of panels mounted to a spindle with wheels fixed at spaced intervals along its vertical height, and the panel are made of a polyethylene grass matting providing a high surface area to volume ratio of at least 20 to 1. Gas from the top of the vessel is recycled to the bottom to generate bubbles for mixing the feedstock. The related method of anaerobic digestion includes comminuting input wastes with a slurry grinder into a pumpable slurry 8-10 % by weight solids, and providing as the biomass hydrolytic bacteria, and fermentative bacteria including acetogenic and methanogenic bacteria to produce a methane gas product. Other products include an organic soil additive, bacterial solids plant food, and a filtrate used as plant tonic.

A method for the accurate measurement of the true dimensions and true geometric shape of an insulated, or otherwise wrapped tank, and for the subsequent calculation of the strapping table (strap chart) thereof, for any desired liquid height increment, without removing the wrapping (insulation), or draining and cleaning the tank on the inside. A number of points are identified and located on the tank shell, for which 3D coordinates measurement is desired. A target is used for each desired measurement point. The method uses a total station to determine the 3D coordinates of a minimum of 3 points on a reflective target. The target is attached to a bolt that can be threaded through the tank insulation until the end of the bolt makes snug contact with the tank shell. The 3D coordinates of the 3 points on the target, measured with the total station, are converted to the coordinates of the point of contact between the tank shell and the tip of the bolt, which could not be sighted or measured otherwise, being covered by the insulation.

A liquid dispensing device, includes a container for holding a supply of a liquid to be dispensed; a liquid feed tube having one end exposed to the interior of one end of the container for feeding liquid by gravity through the opposite end of the liquid feed tube when the container is inverted with the one end of the container facing downwardly and the opposite end of the liquid feed tube located at a lower elevation than the level of the liquid in the container; an air inlet leading from the atmosphere into the interior of the one end of the container so as to be immersed by the liquid therein when the container is filled with a liquid and inverted; and an air inlet control device effective, when the container is inverted, to block the outflow of liquid from the interior of the container via the air inlet, but to permit atmospheric air to enter, via the air inlet into the interior of the container at a very slow rate and to bubble through the liquid within the container, whereby dispensing of the liquid from the container via the liquid feed tube is also effected at a very slow rate.

The invention relates to a method for sensing an oil level of an automobile fuel tank, which adopts two parallel plate capacitors as a measurement capacitor and a reference compensation capacitor respectively; the height of the measurement capacitor is close to or equal to that of the fuel tank, and the measurement capacitor is vertically arranged in the fuel tank; and the reference compensation capacitor is horizontally arranged at the bottom of the fuel tank and immersed in oil liquid. The two capacitors are of an open type; when the oil-level height in the fuel tank changes, the height of oil liquid entering the measurement capacitor also changes and a capacitance value of the measurement capacitor changes correspondingly, but a capacitance value of the reference compensation capacitor does not change with the change of a liquid level. The measurement capacitor is compensated by the reference compensation capacitor, so an accurate change value of the measurement capacitor can be obtained; and an exact value of the oil-level height in the fuel tank can be acquired by the linear relation of the change value of the measurement capacitor and the oil liquid height through circuit processing so as to realize oil-level measurement. Due to the adoption of the reference compensation capacitor, the oil-level measurement which is irrelevant to media under different environments is realized; and the used sensor has corrosion resistance, no mechanical moving parts, long service life, simple structure, low process requirements and low cost.

The invention relates to a device and a method for automatically metering and calibrating horizontal tank capacity based on a standard metal tank. Computer control equipment acquires height of liquid injected into a horizontal tank from the standard metal tank and liquid temperature information in real time, the height of liquid is converted to liquid capacity at standard temperature, and a capacity table corresponding to the measured liquid height of the horizontal tank is calculated. Moreover, a liquid inlet solenoid valve of the standard metal tank can control the liquid inlet flow; when the liquid level is detected to be lower than a certain threshold, a computer controls the liquid inlet valve to open to rapidly inflow the liquid at high flow; and when the liquid level is detected to reach the threshold, high-flow liquid inlet control is closed, and low-flow liquid inlet control is opened to slowly inflow the liquid until the liquid level meets the set liquid level. All components of the metering and calibrating device have explosion-proof function, and meet the explosion-proof requirement on a calibration site. The system for automatically metering the horizontal tank capacity is simple in structure, high in degree of automation, easy to operate and suitable for the horizontal tank on site.

An automated dispensing system and method for dispensing a viscous liquid material along an imperfect dispensing path. In a first scan, a scanning apparatus determines a dispensing path. A dispensing apparatus dispenses the viscous liquid material along the dispensing path. In a second scan, the scanning apparatus measures a dimension of the dispensed material. Object not meeting an acceptable liquid height are rejected.

The invention discloses a closed oil film visualization device capable of measuring leakage of a reciprocating sealing piston. The device comprises a tabletop visualization mechanism and an oil supply system, wherein the tabletop visualization mechanism comprises a top plate, a base frame, a linear actuator, a pull pressure sensor, a piston and a transparent cylinder; lower leaked liquid detecting components are arranged around the bottom of the piston; an upper leaked liquid height detecting component and a microscope observation component are arranged on the side wall of the base frame; a vertical oil way and a horizontal oil way are arranged in the piston; the two ends of the horizontal oil way penetrate through the side wall of the piston; the vertical oil way is connected and communicated with the upper leaked liquid height detecting component; an annular groove is peripherally formed in the middle part of the piston to serve as an oil closed cavity to be connected to the oil supply system; and gaps are formed in the side surface of the piston and the inner wall of the transparent cylinder. The device solves the technical difficulties in a traditional device, supplies stable liquid pressure, guarantees the bearing capacity and the service life of a glass cylinder, and detects the sealing leakage quantity or the magnitude of pumping back quantity.

A layer height measuring system in one embodiment has a transmission line including a probe for measuring a height of a first layer within a tank and a cable that connects the probe to an electronics unit. The electronics unit cyclically transmits interrogation pulses to the probe and receives reflections therefrom for time domain reflectometric measurement of the height of the first layer. The layer height measuring system may also have a memory and a processor configured by the memory to perform the steps of detecting first and second impedance transitions corresponding to first and second boundaries of a bounded region of known length; optimizing a sweep offset and a sweep gain so as to cause swept sample collection to occur substantially only within the bounded region; and detecting a third impedance transition within the bounded region, the third impedance transition corresponding to an interface between the first layer and a second layer, the first and second layers having respectively different dielectric constants.

The invention relates to an ink supply system. The ink supply system comprises a feed liquid container, a pump, an ink storage device and a valve body. The ink storage device is provided with a first input port, an output port and a sensing element. The first input port receives ink drawn off by the pump, the output port and an ink-jet element are connected for outputting ink, the sensing element is arranged in the ink storage device for sensing the liquid height of the ink in the ink storage device so as to control the pump to run to draw off the ink, the valve body is connected between the ink storage device and the ink-jet element to selectively enable the ink to flow to the ink storage device from the ink-jet element for recovery. By such a structure, the sensing element senses the liquid height of the ink storage device so as to maintain the ink content of the ink storage device, enable the pressure in the ink storage device to be stable and accordingly maintain the pressure of the ink cavity of the ink-jet element, thus the effect of stable printing quality is achieved.

The invention discloses an embeddable smart range hood and an oil fume extraction control method. The embeddable smart range hood comprises a panel, a smoke sensor, a controller, a motor, a wind wheel, a range hood shell, a condensation smoke guide plate, a hydraulic telescopic rod and retractable fan blades. The smoke sensor collects oil fume and smoke concentration information A and transmits the oil fume and smoke concentration information A to the controller. A liquid level sensor collects liquid height information of accumulated oil in an oil box and transmits the liquid height information to the controller. The motor is controlled by the controller to adjust the rotational speed of the wind wheel in real time. The hydraulic telescopic rod is controlled by the controller, so that the telescoping amount of the hydraulic telescopic rod is adjusted in real time, and the opening and closing degree of the retractable fan blades is adjusted. The range hood can sense the concentration of oil fume through the smoke sensor and absorbs oil fume by changing the position of the condensation smoke guide plate and the position of an air inlet through the hydraulic telescopic rod. The liquid level sensor is arranged on the oil box of the range hood. When the oil level reaches an early warning value, the range hood automatically stops running. The embeddable smart range hood has the advantages of being simple in structure, attractive in appearance, detachable, capable of saving energy, environmentally friendly, capable of intelligently absorbing smoke and conducting intelligent control and the like.

The invention provides a storage tank volume automatic measure system, the transducer 11 inputs the flow speed signal of the tested liquid which flows through the centrifugal pump 3 into the operational amplifier 12, a pressure sensor 5 and a temperature sensor 6 are separately installed on the pipeline, the pressure and the temperature information of the test liquid are separately inputted into the operational amplifier 12, a solenoid directional valve 7 and a water tank for measurement 8 are connected with the pipeline in parallel connection, the water tank for measurement 8 and the tested storage tank 9 are connected by a pipeline, a magnetostrictive liquid level sensor 10 is fixed on the tested storage tank 9, the operational amplifier 12 is connected with the computer 15 through the A / D converter 13, and the input and output interface 14, the standard flow gauge 4 gives the volume of the tested liquid which goes into the measurement system, the magnetostrictive liquid level sensor 10 collects the liquid height signal in the tested storage tank 9, the signal is transferred through the operational amplifier 12 and A / D converter 13 and the input and output interface 14, the liquid height reading in the tank is automatically displayed on the computer.

The invention provides a discharge and mining control method and device of exposing a combination development coal-bed gas well upper production layer, and belongs to coal-bed gas ground mining control method and device. The discharge and mining process can be divided into six stages, namely, initial stage liquid drainage, pressure holding and production increasing, pressure control and production stabilizing, aerogenesis and attenuation, liquid drainage via the coal layer and pressure control and production increasing. In the initial stage liquid drainage stage, the decreasing range of the liquid level is controlled so as to drain more formation water and fracturing liquid; in the pressure holding and production increasing stage, a casing pressure upper limit is set, and daily gas production is gradually increased; in the pressure control and production stabilizing stage, the decreasing range of flowing pressure is stabilized, and drastic fluctuation of daily gas production and daily liquid production is avoided; in the aerogenesis and attenuation process, the flowing pressure is slowly decreased till the daily gas production is gradually decreased below a commercial airflow standard; in the liquid drainage via the coal layer stage, the liquid height is decreased so as to expose an upper production layer, and recovery of the casing pressure is eradicated; in the pressure control and production increasing stage, the casing pressure is kept stable or slightly decreased so that the daily gas production is gradually increased. By means of the discharge and mining control method and device of exposing the combination development coal-bed gas well upper production layer, the problem that the upper production layer is prone to damage after being exposed is solved, and the time of a combination development coal-bed gas well for achieving high and stable yield can be significantly prolonged.

The invention relates to the determination of the liquid level height difference of a well casing of a gas well in the field of gas field development, provides a method for determining the liquid level height difference of the well casing of a liquid accumulation gas well by utilizing the communicating vessel principle, and particularly relates to a method for determining whether liquid accumulation exists in a gas well or not and determining the liquid accumulation degree. According to the method, firstly, the oil pressure, the casing pressure, the gas density and the liquid density of the gas well during well closing are obtained; secondly, the accumulation liquid height difference of the well casing of the gas well is obtained through the calculation of the oil pressure, the casing pressure, the gas density and the liquid density, and the liquid accumulation and the liquid accumulation degree are judged through the accumulation liquid height difference. The accumulation liquid height difference of the well casing of the gas well can be determined through inputting and obtaining oil pressure and casing pressure data of the gas well after the well closing, only well closing oil pressure and casing pressure data needs to be specified, and a well testing instrument does not need to be placed into the well bottom. Compared with the prior art, the method has the advantages that the method is simple and convenient, and the cost is lower.

The invention discloses a device and method for achieving laser high-cavitation-strengthening efficiency. The device comprises a water tank. The bottom of the water tank is provided with a clamping device and a workpiece arranged on the clamping device. The two sides of the workpiece are provided with temperature sensors. The wall face of the water tank is provided with a liquid level sensor and a resistance heater. A laser cavitation system is arranged above the water tank. The laser cavitation system is connected with a computer. The temperature sensors, the liquid level sensor and the resistance heater are connected with the computer through a data processing device. The computer controls the resistance heater to heat liquid to change the physical property of the liquid and controls the height of the liquid in the water tank by adjusting the delivery capacity of a liquid pump, so that high-efficiency avitation and strengthening of the material surface performance are achieved. According to the device and method, high-efficiency cavitation and strengthening of materials are achieved by adjusting the liquid temperature and the liquid height.

A horticultural system which consists of a container for a plant which sits within a reservoir for irrigation liquid to allow flow of irrigation liquid between the container and reservoir. Irrigation liquid may be to said container and / or said reservoir. Sensor means are located in said reservoir to measure the volume of liquid in said reservoir and a second sensor means in said reservoir measures the electrical conductivity of liquid in said reservoir. A controller is programmed to control the supply of irrigation liquid to the container and / or reservoir using the measurement of liquid height and electrical conductivity in said reservoir. The height sensor consists of a set of electrodes with length equal to the depth to be measured and appropriate electronic circuitry for measuring conductivity between said electrodes and the electrical conductivity sensor consists of a second set of electrodes of short length relative to said first set of electrodes with appropriate electronic circuitry for measuring conductivity between said electrodes.

A sensor arrangement for measuring liquid height in a tank can include a housing, a transducer, and a couplant. The housing can have an interior and an aperture, the aperture placing the interior of the housing in communication with the environment external to the housing. The transducer can be seated within the aperture. The couplant can be mechanically connected to the transducer and can have a compressible couplant body. The couplant body can extend between the transducer and the external environment for transmitting an acoustic pulse from the transducer to a tank bottom for measuring height of a liquid overlaying the transducer.

The invention provides a liquid mixing chamber type regulable antenna. The liquid mixing chamber type regulable antenna comprises an antenna of a hollow cavity structure and a feed end connected with the antenna, wherein liquid is injected into the antenna; the feed end comprises a coaxial joint, a microwave dielectric substrate and metal ground arranged below the microwave dielectric substrate; the antenna is arranged above the microwave dielectric substrate; the coaxial joint is arranged by penetrating through the microwave dielectric substrate and the metal ground, the coaxial joint is provided with a probe communicated with the liquid inside the antenna, and the antenna comprises an inner cavity, an outer cavity and a regulation column; the inner cavity is arranged in the internal cavity of the outer cavity, and the regulation column is arranged by penetrating through the inner cavity and a through hole in the lower end of the outer cavity. The liquid mixing chamber type regulable antenna is simplified in structure, the inner cavity and the outer cavity can be communicated by pulling the regulation column, liquid heights in the inner cavity and the outer cavity are regulated, and changes of antenna pattern main lobe orientation and gain numerical value are caused, so that liquid distribution reconfiguration is realized, and radiation and matching performance of the antenna are changed.

The invention discloses a precision forming technique of continuous glass fiber; the chosen components of the glass are as follows: 53.5 to 54 percent of SiO2, 14.2 to 14.8 percent of Al2O3, 6.5 to 6.8 percent of B2O3, 22.5 to 23 percent of CaO, MgO being less than 0.5percent, 0.5 to 0.8 percent of R2O (Na2O, K2O), Fe2O3 being less than 0.4 percent, TiO2 being less than 0.5 percent, 0.3 to 0.5 percent of F; the raw materials of the glass are melt in a melting department according to the material percentage; the glass hotspot temperature in the melting department is controlled within 1350 to 1450 DEG C; the glass temperature at the inlet of a main pathway is controlled within 1370 to 1400 DEG C; the glass temperature at the outlet of the main pathway is controlled within 1360 to 1370 DEG C;, the glass temperature on an operation pathway is controlled within 1260 to 1330 DEG C, and the glass liquid height in the operation pathway is controlled within 250mm to 300mm; the upper mouth of a plate-inserted cooler is arranged at the place that is 2 to 3.5mm from the outlet of a forming tip of a leakage plate; the inlet water temperature of the plate-inserted cooler is controlled within 20 + / - 2 DEG C, and outlet water temperature is controlled within 25 + / - 2 DEG C; the environment flow of the wire drawing process is controlled at 2mm / H2O of negative micro-pressure with the temperature controlled within 20 to 25 DEG C; by adopting the invention, the forming of the continuous glass is more accurate, and end breaking, flying wire and monofilament diameter are evidently reduced; the shortage of uneven density is overcome.

The invention provides a laser high-temperature liquid height measurement and control system. The system comprises a laser transmitter used for transmitting laser beams, a laser receiver used for receiving laser beams, a driving unit used for driving the laser transmitter and the laser receiver to rotate synchronously, a controller used for analyzing electric signals, calculating the liquid level height and change rate of high-temperature liquid according to a formula, and sending out warning information, and a liquid level control pump used for regulating the level of high-temperature liquid in a high-temperature container. Laser beams resistant to high temperature and interference are used as a measurement light source, the liquid level height and liquid level height change rate of high-temperature liquid can be measured in real time in a high-temperature environment, and the level of high-temperature liquid is regulated in real time. The invention further provides a laser high-temperature liquid height measurement and control method. The method comprises the steps of signal zero setting, liquid level measurement, liquid level regulation and the like and overcomes the defects of existing detection methods that adopted algorithms are complicated and detection precision is low.

The invention discloses a two-roll continuous-casting magnesium alloy band casting device, which is characterized by the following: two end faces of forging roll connects the side closing board through support structure; the baffle is placed on the rectangle groove with all-around sealing of forging roll surface and side closing board; the rectangle groove is reinforced by fastening device; the bottom of baffle connects the forging roll directly, whose touch face displays arc face; the working face of baffle faces roll gap of two forging rolls; the function board is connected on the back of baffle working face, which connects the forging roll stickly. The invention can improve the liquid height greatly, which is easy to realize submersible casting to improve the casting band mould quality.

The present invention discloses a liquid lens capable of realizing electronic control focusing. The liquid lens comprises: a first lens fixing ring (01), a second fixing ring (02), a first lens window(03), a piezoelectric ceramic tube (04), a straight-line guiding rail (05), a piezoelectric actuator (06), a pushing pressing piece (07), an actuating cavity (08), a liquid cavity (09), a second lenswindow (10), a lens external interface (11), a vision sensor (12), a lens shell (13), a sealed lens (14), a first sealing ring (15), a second sealing ring (16), a driving foot B (17), a piezoelectricceramic stack B (18), a actuator B shell (19), a actuator C shell (20), a piezoelectric ceramic stack C (21), a driving foot C (22), a actuator A shell (23), a piezoelectric ceramic stack A (24) anda driving foot A (25). According to the liquid lens, by applying a sinusoidal alternating current voltage signal on an internal electrode and an external electrode of the piezoelectric ceramic tube (04), a radial ultrasound field is generated in the piezoelectric ceramic tube (04), so that the internal liquid refractive index is changed, and thus focal length of the liquid lens is changed. By controlling the piezoelectric actuator (06), the liquid height in the liquid cavity (09) is changed, and thus the imaging size of objects is changed. The liquid lens capable of realizing the electronic control focusing has the advantages of convenient and simple manufacture, wide application range and strong practicability.

A device and a measuring method which can automatically and continuously record the early volume change of concrete relate to a device and a measuring method for measuring the volume change of the concrete. The invention solves the problems of the large result error and being incapable of continuing day and night in the manual observation in the method by adopting the liquid height change to measure the early volume change of the concrete. The lower end of a thin tube (2) is vertically inserted into a closed container (1); the lower end surface of the thin tube (2) is arranged below the liquid level of a conductive liquid (6); two resistance wires (4) are respectively and symmetrically stuck on the outer surface of a glass stick (3) along the length direction of the glass stick (3); the upper ends of the resistance wires (4) are respectively connected with the two post heads of a reading instrument (5). The method includes: sealing and packaging a sample, arranging the sample into the closed container, injecting the conductive liquid into the closed container and reading a numerical value. The method of the invention is simple; the measured data is accurate; the method can provide more accurate data for the early volume change of the concrete.

The invention relates to a container for containing liquid and aims to avoid the defect that as for a current container with a liquid level sensor, the liquid level sensor has high probability of giving a false alarm. The container provided by the invention comprises a container body with a liquid level sensor, wherein the liquid level sensor comprises a vertical columnar inductor and an induction float block sleeved on the inductor and being capable of sliding up and down; a cylinder body is vertically arranged in the container body and is provided with a lower part connected with the bottom of the container body; the lower end of the inductor is positioned in the cylinder body, and the induction float block can move up and down in the cylinder body; the height of the cylinder body is larger than the lowest liquid level height causing the liquid level sensor to give an alarm; and a damping hole is formed in the lower end of the cylinder body and communicated with the outside of the cylinder body. According to the invention, the liquid height of the cylinder body does not change with the changes of the liquid level outside the cylinder body, caused by various oscillation, so that the real height close to that of the still liquid can be detected out even if the liquid level in the container body is subject to serious oscillation, so as to avoid false alarm.

The invention provides a method and a device for preventing a thin-strip continuous casting molten bath surface from contaminating. The method comprises the following steps of arranging molten bath liquid level detecting devices on the both ends of a molten bath, respectively observing the situations of floating slag on a molten bath surface of a driving side and a driven side of a casting roller and liquid height of the molten bath, if the distance between the floating slag edge of the molten bath surface and the junction line of molten steel and the rolling surface of the casting roller surface is monitored less than 25 mm, removing the floating slag from the molten bath surface through a floating slag removing device, thereby keeping cleaness of a thin-strip continuous casting molten bath, avoiding the floating slag to be drawn in a solidified steel billet shell, and improving the quality of a cast strip. With the adoption of the method and device provided by the invention, the molten steel on the molten bath surface can be avoided to be solidified; the cleanness situation of the surface of the thin-strip continuous casting molten bath can be observed, so that after the floating slag is accumulated to a certain extent, the floating slag can be removed through the floating slag removing device, thereby keeping the thin-strip continuous casting molten bath tidy, avoiding the floating slag to be drawn in the solidified steel billet shell and improving the quality of the cast strip.

An IV set includes a drip chamber and a pressure activated valve. The drip chamber has an operable liquid height and an outlet orifice. The pressure activated valve is disposed proximate the outlet orifice of the drip chamber and includes a sealing orifice, a valve, and a biasing mechanism. The sealing orifice and the operable liquid height correspond to a head. The biasing mechanism biases the valve against the sealing orifice with a force less than the head of the operable liquid height to control the flow of liquid through the pressure activated valve.

The invention discloses a device and method for removing snow and ice from a satellite antenna. The device comprises a shovel head, a shovel body, a shovel arm, an electric control module, a water pump, a liquid level sensor and a voice buzzer, wherein the outside surface of the shovel head is in accordance with the cambered surface of the satellite antenna; a plurality of small holes are arranged on the outside surface of the shovel body; one end of the shovel arm is connected with the shovel body; the other end of the shovel arm is connected with an operation rod; a first water pipe is arranged in the shovel arm and the operation rod in a penetrating manner; the first water pipe is a corrugated pipe; a melted snow liquid spray head is installed at one end, connected with the shovel body, of the first water pipe; the other end of the first water pipe is connected with a second water pipe connected with a melted snow liquid storage box; the electric control module comprises a power supply and a controller; the water pump installed in the melted snow liquid storage box is connected with the controller through a drive motor; the liquid level sensor installed in the melted snow liquid storage box is connected with the controller; the voice buzzer is connected with the controller; the liquid level sensor detects a melted snow liquid level value and transmits the melted snow liquid level value to the controller, so that the melted snow liquid level value is compared with a preset melted snow liquid height; and the controller controls the voice buzzer to give an alarm when the detected liquid level value is lower than the preset melted snow liquid height.

The invention relates to a new method for measuring aluminum liquid height in daily management of electrolytic cell in aluminum smelting industry. The invention comprises following procedures. 1) Measuring support is set on the furnace platform of aluminum outputting port of electrolytic cell. 2) The front end of measuring drill inserts into electrolyte to measure the boundary of electrolyte and aluminum liquid. 3) The distance x between the boundary and the line at the root of measuring drill. 4) Aluminum liquid height h-x is calculated. The invention is provided with following merits. 1) Measuring height and measuring tool are unified and measuring position is not restricted. 2) Because there is no need to contact with the furnace bottom by measuring drill measuring error generated by drill tip melting because of over large local current when the tip of measuring drill often contacts with the furnace bottom can be avoided. 3) It is available for improve the situation of furnace bottom of crusted electrolytic cell. 4) Error by hole of cathode at the aluminum outlet port can be avoided. The invention can be applied in measuring management for aluminum liquid height of all groove-type aluminum electrolytic cell.

The invention discloses an ultraviolet disinfection system which is used for the fluid disinfection in a disinfection channel; the ultraviolet disinfection system comprises at least one ultraviolet lamp module, ballasts which are matched with the ultraviolet lamps in the ultraviolet lamp modules, and an electric control system composition; each ultraviolet lamp module comprises a plurality of ultraviolet lamps and braced frames of the ultraviolet lamps; the ultraviolet disinfection system is characterized in that the ballasts of the ultraviolet lamps adopt a module type structure, namely, each ultraviolet lamp module is corresponding to one ballast module; each ballast module comprises a plurality of ballasts and a ballast box which is used for packaging the ballasts; and the bottom of the ballast box is higher than the liquid height of the fluid in the disinfection channel.

The invention discloses a frequency reconfigurable liquid medium resonant antenna which comprises a liquid dielectric resonator and a ground plate. The main radiating element of the antenna is the liquid dielectric resonator composed of a transparent cuboid liquid container and pure water. The liquid container is evenly divided into a number of intervals. The size of the liquid medium resonator can be changed by adding pure water at a specific interval. The resonant frequency of the liquid resonator can be reconstructed. In addition, the liquid height in each interval is also adjustable. The operating frequency of the liquid resonant antenna can be further adjusted under different liquid interval combinations. According to the invention, liquid medium resonance structures of various sizescan be formed in the same structure without using an active device and a matching circuit; compact antenna scale, high radiation efficiency and wide frequency band coverage are realized; and the design can be widely used in various applications in the field of wireless communications.