40results about How to "Unaffected by the surrounding environment" patented technology

The invention discloses a Beta-Ga2O3 based solar-blinded ultraviolet photoelectric detector array and a preparation method thereof, and relates to the photoelectron technical field; the detector array comprises the following structures from bottom to top: a Beta-Ga2O3 luminous absorption layer, a lower electrode layer, an oxide film insulating layer and an upper electrode layer; the Beta-Ga2O3 luminous absorption layer is formed by growing a Beta-Ga2O3 film on a substrate; the lower electrode layer comprising column wires and interdigital electrodes is formed on the Beta-Ga2O3 luminous absorption layer; the oxide film insulating layer is arranged on the lower electrode layer; the most top layer is the upper electrode layer comprising line wires; the oxide film insulating layer is arranged in middle of the intersection portion of the line wires and column wires; the anode of each column of the interdigital electrode is connected on the column wire of the same column; the line wire is connected with the cathode of each line interdigital electrode; the prepared detector array is packaged by a ceramic packaging unit, thus obtaining the Beta-Ga2O3 based solar-blinded ultraviolet photoelectric detector array. The Beta-Ga2O3 based solar-blinded ultraviolet photoelectric detector array is strong in process controllability, low in cost, simple in operation steps, good in repeatability, short in development period, and can be massively produced.

A transient flow problem method-based oil pipeline dropping detection device belongs to the field of operation and maintenance of a long-distance oil pipeline. The invention aims to solve the problems that the existing quantitative and positioning device for detecting the dropping of the oil pipeline is high in use cost and time-consuming and is easily influenced by environment. The transient flow problem method-based oil pipeline dropping detection device comprises a processor, a storage, a data collecting card and M pressure sensors; the M pressure sensors are uniformly arranged on the oil pipeline; the pressure signal output end of each pressure sensor is connected with the pressure signal input end of the data collecting card of which the pressure signal output end is connected with the pressure signal input end of the processor; the data transmission end of the processor is connected with the data transmission end of the storage; the processor processes the collected pressure signal in real time, and a transient flow problem method is adopted for judging whether the oil pipeline dropping exists or not.

The invention relates to an epoxy-pouring full-insulation solid isolating switch, which comprises an isolation body, a grounded contact, an isolation contact, a middle contact, an isolation moving contact, a driving screw rod, a fixed nut and a driving gear part, wherein the grounded contact and the isolation contact are arranged at two ends of the isolation body respectively, the middle part of the isolation body is provided with the middle contact, the upper end of the isolation contact is connected with a bus contact through a bus-bar, the bus contact is arranged on the top of the isolation body, and the isolation moving contact is always contacted with the middle contact through a watch chain sensing finger. The isolation switch slides between two positions of the middle contact and the isolation contact or the middle contact and the grounded contact to form the conduction or the isolation grounding of the isolating switch. The entire isolating switch is poured into a fully-sealed integral structure with epoxy resin.

The invention discloses an active-type infrared camouflage structure based on vanadium dioxide, and the structure comprises a heating substrate, a vanadium dioxide film, and an electrode pair. The vanadium dioxide film is disposed on the upper surface of the heating substrate in a manner of coating or vapor plating The heating substrate changes the temperature of the vanadium dioxide film through current heating while providing support for the vanadium dioxide film. The electrode pair is located at two ends of the heating substrate, and is connected with an external power supply and the heating substrate. The electrode pair is used for changing the temperature of the heating substrate, so as to adjust the change of the emissivity of vanadium dioxide. The structure can achieve low-power-consumption and quick adjustment infrared camouflage.

A blade of a wind turbine is provided with at least one vortex-generator, which is positioned at the blade-surface. The vortex-generator is constructed and arranged in a way that it contributes to the aerodynamic characteristics of the blade. The vortex-generator comprises a platform and an extension-part. The blade contains a recess, which is constructed and arranged to receive at least a part of the platform of the vortex-generator. The platform is fixed within the recess.

The invention provides a smoking machine with a constant flow velocity. The smoking machine comprises a cigarette clamp holder, a total particulate matter catcher, a reversing valve, a gas flow detection control device, a vacuum pump and a mainstream smoke collecting opening, wherein the cigarette clamp holder is arranged on an upper panel; the total particulate matter catcher is connected onto a mainstream smoke pipeline at the back end of clamp holder; an organic glass cover used for collecting sidestream smoke is mounted on the upper panel; a sidestream smoke outlet is formed in the upper panel positioned in the glass cover; a sidestream smoke filter screen is additionally arranged at the sidestream smoke outlet, and the sidestream smoke outlet is communicated with a sidestream smoke blower and a sidestream smoke collecting opening; the total particulate matter catcher is mounted on the upper panel; the reversing valve, the gas flow detection control device and the vacuum pump are arranged on a bottom plate; a cleaning gas circuit interface is arranged on the reversing valve. The smoking machine with the constant flow velocity, provided by the invention, has the advantages that smoking flow quantity of a cigarette can be stabilized, the setting and control of the constant flow velocity can be achieved, a smoke passage can be cleaned timely, influences on experimental results are reduced greatly, the mainstream smoke and sidestream smoke can be collected in an expanded manner during cigarette burning, and analysis and detection to compositions of the mainstream smoke and the sidestream smoke can be achieved.

The invention discloses a method for measuring optical fiber dispersion based on an optical switch laser beat-frequency system, which is characterized in that optical fiber gratings with different central wavelengths are selected through adjusting an optical switch, variations in beat frequency in a laser resonant cavity are realized, variations in laser beat frequency before and after an optical fiber to be measured is added to an optical path are measured respectively by using a spectrum analyzer, and a relation between the variation in laser beat frequency before and after the optical fiber to be measured is added to the optical path and the corresponding dispersion of the optical fiber to be measured is established, so that measurement for the dispersion of the optical fiber to be measured under different wavelengths is enabled to be converted into measurement for the variation in laser beat frequency, and measurement for the dispersion of the optical fiber to be measured is realized through data processing. According to the invention, the optical fiber dispersion is measured by using multi-longitudinal mode beat-frequency signals, so that the method is not affected by the system loss and light source fluctuations, and measurement for the dispersion of the optical fiber to be measured is successfully realized. The method is not only good in stability, simple in structure of a measurement system and low in cost, but also converts optical signal measurement into electric signal measurement, thereby being convenient to perform data processing.

The invention discloses a 4K real-time video panoramic stitching method based on GPU acceleration. The method comprises the following steps that hardware equipment takes streams and directly transmitsthe streams to a GPU video memory; calculating camera parameters and storing the parameters; calculating image brightness and chromaticity correction parameters; calculating a mask pattern, and performing image fusion on subsequent frames by using the mask pattern; mapping the images to a projection plane by using the calculated camera parameters, and superposing the overlapping areas of the twoimages together; performing compensation processing on the image by using the brightness and chroma correction parameters calculated in the step 3; and fusing the images by adopting an image pyramid and an optimal splicing technology to obtain a panoramic spliced image for display, output and storage. According to the method, the high-frequency detail information of the image is extracted by adopting a Gaussian multilayer pyramid method for fusion, and all operations are accelerated by using the GPU, so that the problems of ghosting and ghosting in the splicing process are solved, and the real-time requirement is met.

The invention relates to an epoxy-pouring full-insulation solid isolating switch, which comprises an isolation body, a grounded contact, an isolation contact, a middle contact, an isolation moving contact, a driving screw rod, a fixed nut and a driving gear part, wherein the grounded contact and the isolation contact are arranged at two ends of the isolation body respectively, the middle part of the isolation body is provided with the middle contact, the upper end of the isolation contact is connected with a bus contact through a bus-bar, the bus contact is arranged on the top of the isolation body, and the isolation moving contact is always contacted with the middle contact through a watch chain sensing finger. The isolation switch slides between two positions of the middle contact and the isolation contact or the middle contact and the grounded contact to form the conduction or the isolation grounding of the isolating switch. The entire isolating switch is poured into a fully-sealed integral structure with epoxy resin. The epoxy-pouring full-insulation solid isolating switch provided by the invention has the advantages of full insulation, insulation structure, small volume, extensibility, easy installation, free maintenance, long life, stable and reliable performance, and the like.

The invention discloses a fully-automatic high-head sewing machine. The fully-automatic high-head sewing machine comprises a support, an operating platform and a sewing machine body, the operating platform is fixedly arranged on the support, the sewing machine body is fixedly arranged on the operating platform and provided with an intelligent control mechanism and a sewing mechanism, a feeding mechanism is arranged at the position, opposite to the sewing mechanism, of the operating platform, multiple photoelectric sensor probes are arranged between the sewing mechanism and the feeding mechanism, a driving motor is further arranged below the operating platform and connected with the sewing mechanism, and the sewing machine body is further fixedly provided with an audible and visual alarm device. The fully-automatic high-head sewing machine is simple in structural principle, convenient to use, high in automation degree and capable of achieving multiple functions such as automatic sewing, automatic calibration and failure alarm, and sewing efficiency is improved.

An environmentally friendly gas insulation switch cabinet comprises a two-station isolation switch, a miniature vacuum environmental protection switch, a fuse cabin and an isolation switch observationdevice. The two-station isolation switch is form by assembling isolation static supports, isolation blades, vacuum arc-extinguishing chamber fixed contacts, insulation pull rods and isolation main shafts. The miniature vacuum environmental protection switch is mainly formed by assembling embedded poles, a contact pedestal, main shaft pull rods and an operation mechanism. Moving contacts of the vacuum arc-extinguishing chamber fixed contacts pass through grooves to be in contact with a table link contact finger. The fuse cabin is mainly formed by assembling a cabin body, a fuse, a 5-claw claw,an 8-claw claw and an insulation plug. The environmentally friendly gas insulation switch cabinet is reasonable in design, relatively simple in manufacturing process, small in volume, light in weight, stable in performance and reliable in motion, has a very high electrical safety performance, is a powerful ensure for power supply reliability and can reduce preconditions of user investment.

The invention relates to a front driver speed measuring device. The front driver speed measuring device comprises a bearing seat, wherein a spline shaft is arranged in the bearing seat through a rolling bearing; the front end of the spline shaft is provided with a spline inner hole which is connected with a front driver output shaft spline; the back end of the spline shaft is connected with a speed measuring encoder through an elastic shaft coupling; the speed measuring encoder is fixedly arranged on an encoder seat; the encoder seat is fixedly arranged at the back end of the bearing seat; a pair of transverse beams for mounting the front driver speed measuring device on a longitudinal beam of a front driver bracket is fixedly arranged at the lower end of the bearing seat; a tongue plate is arranged between the transverse beams; the tongue plate is provided with a locking bolt for fixing the tongue plate on a transverse beam of the front driver bracket. The front driver speed measuring device has the advantage that the revolving speed of a front driver output shaft can be measured accurately.

The invention provides a desert moisture acquisition device. The desert moisture acquisition device comprises a moisture acquisition device body and a condensing device. The water acquisition device body comprises a cylinder, a heater and an air exhauster. A constant pressure valve is arranged on the side face of the cylinder, an inner cavity of the cylinder is communicated with external air through the constant pressure valve, an acquisition opening is formed in the lower end of the cylinder, a partition net is arranged in the portion, close to the acquisition opening, of the inner cavity of the cylinder, the heater and the air exhauster are located at the upper end of the cylinder, an air inlet of the air exhauster is communicated with the inner cavity of the cylinder, an air outlet of the air exhauster is communicated with an air inlet of the condensing device, and a water outlet and an exhaust port are formed in the condensing device. The desert moisture acquisition device has the following advantages that moisture in sand is evaporated in negative pressure environments, moisture evaporation can be quickened, follow-up condensing efficiency is higher, water outflow is quicker, and water intake efficiency is obviously improved; the desert moisture acquisition device is compact in structure, convenient to use, free of influences of surrounding environments, capable of being used in multiple environments and high in universality.

A jade-type calligraphy picture is composed of a decorative plate with a decorative frame, and the jade-type calligraphy modules made of jade powder and resin. Its preparing process includes such steps as using silica gel to make the moulds, proportionally mixing jade powder with resin, stirring, pouring in said moulds, natural drying, sticking the calligraphy modules onto a decorative plate and installing frame.

The invention relates to the field of high-voltage measurement, and discloses a high-voltage direct current generating module and a generator. In the embodiment, the a high-voltage direct current generating module comprises a first coil, a second coil, a third coil, a first diode, a second diode, a first capacitor, a second capacitor, a first resistor and a second resistor. The embodiment of the invention further provides a high-voltage direct current generator. The high-voltage direct current generator reduces the element appliance number of the high-voltage direct current generating module, and further decreases the volume of the high-voltage direct current generating module, and simplifies the circuit connection of the generating module; the high-voltage direct current generating module is located in an insulation environment, the maintaining cost of the generator is reduced, the volume and assembling difficulty of the generator are reduced, the expansion of higher voltage is rapidly completed; the high-voltage direct current generating module is convenient to move and use.

The invention provides a close-distance fixed point restored sound wave forming method. The method comprises the steps of generating at least one audio signal; and generating at least two high frequency carrier signals corresponding to the audio signal. The audio signal is loaded to the corresponding high frequency carrier signals, thereby forming at least two loading signals. The loading signals are sent to a space intersection area for superposition, thereby forming a close-distance fixed point restored sound wave. The close-distance fixed point restored sound wave has high directivity, so that a close-distance independently sealed hearing area is formed in the space intersection area, and the sound wave is not interfered by external environments.

The invention relates to an intelligent kneepad with a cold compress function for smart medical treatment. The intelligent kneepad with cold compress function for smart medical treatment comprises a main body having a cylindrical shape, and the main body is provided with an air bag and a control box. The air bag has a ring shape, and the inner diameter of the air bag is equal to the diameter of the main body. The main body passes through the air bag, the air bag is fixedly connected with the main body, the control box is fixed on the main body, the control box has a cylindrical shape, and theaxis of the control box is parallel to the axis of the main body. The control box is provided with a detecting mechanism and a processing mechanism. The intelligent kneepad realizes the function of detecting whether the user falls over by a detecting mechanism, and improves the intelligence. A processing mechanism is provided to achieve cold compress treatment of the injured knee of the user for avoiding the increased user injury.

The invention relates to a material level detection device and method of a straw baler, and belongs to the technical field of agricultural machinery. According to the technical scheme, a detection blade (21) on a detection rod (16) enters a preset height position of a stock bin (5) of the straw baler, and a motor shell (14) does not move when a motor shaft continues to rotate; and when materials in the stock bin (5) reach the preset height, counter-acting force drives a motor arranged in the box body (10) in a suspended manner to rotate reversely, a positioning piece (20) triggers an output joint close to a switch (19) to act, and a feeding mechanism of the straw baler is controlled to stop feeding. The material level detection device has the advantages that the actual height of the materials in the stock bin can be visually determined, affects by the surrounding environment are avoided, it is guaranteed that produced straw bags meet the standard requirement, the structure is simple, the maintenance cost is low, and use is convenient.

A gas wing airflow directional aircraft comprises a machine body and a control room and is characterized in that the control room is arranged at the front part of the machine body, a lifting duct is arranged in the middle of the machine body, a propeller is arranged in the lifting duct, a gas separation bin plate with a herringbone longitudinal section is arranged below the propeller in the lifting duct, a transmission shaft of the propeller penetrates through a central hole of the air separation bin plate and is connected with a power transmission system in the control room, gas spraying windows are symmetrically formed in side walls of left and right sides of the lifting duct, the bottom end of the air separation bin plate is connected with the gas separation bin plate, wing-shaped airfoils are symmetrically arranged at the parts, outside the gas spraying windows, at the side walls of left and right sides of the lifting duct; the sections of the airfoils are outwards bulged arc surfaces; rear half parts, close to the machine body, of a propelling duct are symmetrically arranged at two sides of the machine body, and the rear part is connected with a propelling spraying tube, and a fan is arranged in the propelling duct. The gas wing airflow directional aircraft can form directional airflows, the airflows flow to the inside of the airfoils, and are then sprayed out from the bottom ends of the airfoils to form counter-acting force to the machine body so as to fast support the machine body.

The invention relates to a material level detection device and method of a straw baler, belonging to the technical field of agricultural machinery. The technical solution is: the detection blade (21) on the detection rod (16) enters the feed bin (5) of the straw baler at a predetermined height position, and the motor housing (14) does not move when the motor shaft continues to rotate; when the feed bin (5) ) reaches the predetermined height, the reaction force drives the motor suspended in the box (10) to rotate in reverse, and the positioning piece (20) triggers the action of the output node close to the opening (19) to control the feeding mechanism of the straw baler Stop feeding. The beneficial effects of the invention are: the actual height of the material in the silo can be visually determined without being affected by the surrounding environment, and the produced straw bales can be guaranteed to meet the standard requirements, the structure is simple, the maintenance cost is low, and the use is convenient.

The invention relates to a method for improving quality of a doped DLC (diamond-like carbon) film. A shielding device is arranged around a workpiece before plasma CVD (chemical vapor deposition) of the doped DLC film on the workpiece, and an opening is formed in the shielding device and directly faces a plasma outlet; during plasma CVD of the doped DLC film, the shielding device does not rotate with the workpiece but is equipotential with the workpiece. According to the method provided by the embodiment, the shielding device is mainly arranged around the rotating workpiece during deposition, so that the position with extremely uneven plasma density distribution nearby the circumference of the workpiece is shielded, only deposition of high-density ions of plasma right facing the plasma outlet is received, the uniformity, binding force and the like of the finally obtained film are greatly improved, and the method is quite suitable for industrial mass production.

A gas wing airflow directional aircraft comprises a machine body and a control room and is characterized in that the control room is arranged at the front part of the machine body, a lifting duct is arranged in the middle of the machine body, a propeller is arranged in the lifting duct, a gas separation bin plate with a herringbone longitudinal section is arranged below the propeller in the lifting duct, a transmission shaft of the propeller penetrates through a central hole of the air separation bin plate and is connected with a power transmission system in the control room, gas spraying windows are symmetrically formed in side walls of left and right sides of the lifting duct, the bottom end of the air separation bin plate is connected with the gas separation bin plate, wing-shaped airfoils are symmetrically arranged at the parts, outside the gas spraying windows, at the side walls of left and right sides of the lifting duct; the sections of the airfoils are outwards bulged arc surfaces; rear half parts, close to the machine body, of a propelling duct are symmetrically arranged at two sides of the machine body, and the rear part is connected with a propelling spraying tube, and a fan is arranged in the propelling duct. The gas wing airflow directional aircraft can form directional airflows, the airflows flow to the inside of the airfoils, and are then sprayed out from the bottom ends of the airfoils to form counter-acting force to the machine body so as to fast support the machine body.

The invention discloses a garbage suction system and a road sweeper equipped with it, comprising: a suction nozzle assembly, the feed port of the suction nozzle assembly faces the road surface, the discharge port of the suction nozzle assembly is connected with a traction fan, and the traction The fan is connected with a driving regulating device, and the driving regulating device is connected with a control device. The feed side of the feed port of the suction nozzle assembly is equipped with a material guide rotation mechanism. The material guide rotation mechanism includes a rotating induction plate. The material guide rotation mechanism is used to guide and gather garbage to the outside of the induction plate, and the induction plate is used for impact. The collected garbage is then rotated to an angle that matches the height of the garbage so that the collected garbage enters the feeding port from the induction plate. The material guide rotation mechanism is connected with an angle detection mechanism, and the angle detection mechanism is connected with the control device. The angle detection mechanism is used to detect the rotation angle after the induction plate hits the garbage, and sends the rotation angle information to the control device. The information correspondingly controls the action of the drive adjustment device.

A constant flow rate smoking machine, comprising a cigarette holder arranged on the upper panel, a total particulate matter trap connected to the mainstream smoke pipe at the rear end of the holder, a reversing valve, a gas flow detection and control device, It is composed of a vacuum pump and a mainstream smoke collection port. A plexiglass cover for collecting side flow smoke is installed on the upper panel, and a side flow smoke outlet is opened on the upper panel inside the glass cover, and a side flow smoke outlet is added to the outlet. The flue gas filter is in communication with the side flow flue gas fan and the side flow flue gas collection port; the total particulate matter trap is installed on the upper panel, and the reversing valve, gas flow detection control device, and vacuum pump are arranged on the bottom plate. The valve is provided with a purge gas path interface. The invention can stabilize the suction flow rate of cigarettes and realize the setting and control of constant flow rate; it can clean the smoke channel in time, which greatly reduces the influence on the experimental results; and it can expand the collection of mainstream smoke and side smoke when cigarettes are burning. Flow flue gas, realize the analysis and detection of main and side flow flue gas components.

The present invention provides an epoxy pouring solid insulation switch with double-isolation which comprises three same switch bodies arranged in a housing, the switch body comprises a vacuum explosion chamber and two same upper and lower isolation switches; the upper isolation switch, the vacuum explosion-chamber cabin and the down isolation switch are fixedly connected each other, the upper isolation switch locates above the vacuum explosion chamber cabin, the lower isolation switch locates below the vacuum explosion chamber cabin, the lower isolation switch has a same horizontal installing direction and an opposite vertical installing direction with the upper isolation switch. The switch provided by the invention has advantages of reasonable design, higher electric safety performance,little volume, light weight, stable performance, reliable motion, stronger practicability and advancement. The switch provides assurance for reliability of electric supply, which is a precondition condition for reducing user investment.

The invention discloses a garbage suction system and a sweeper truck with the same. The garbage suction system comprises a suction nozzle assembly, wherein a feeding port of the suction nozzle assembly faces the road surface, a discharging port of the suction nozzle assembly is communicated with a traction fan, the traction fan is connected with a drive adjusting device, and the drive adjusting device is connected with a control device. The feeding side of a feeding port of the suction nozzle assembly is provided with a material guide rotating mechanism, wherein the material guide rotating mechanism comprises a rotationally-arranged induction plate and is used for guiding and gathering garbage to the outer side of the induction plate, and the induction plate is used for impacting the gathered garbage and then rotates to an angle matched with the height of garbage so as to enable the gathered garbage to enter the feeding port from the induction plate. The material guide rotating mechanism is connected with an angle detection mechanism, the angle detection mechanism is connected with a control device, the angle detection mechanism is used for detecting the rotating angle of the induction plate after impacting the garbage and sending the rotating angle information to the control device, and the control device correspondingly controls and drives the adjusting device to act according to the received rotating angle information.

The invention provides an air wing type airflow directional load transportation air vehicle. The air wing type airflow directional load transportation air vehicle is technically characterized in that a lifting system comprises wings, lifting ducts and airscrews, a control room is arranged in front of a fuselage, the lifting ducts are arranged on the left side and the right side of the middle of the fuselage, the airscrews are located in the lifting ducts, jet windows are symmetrically formed in the two sides of the fuselage, the lower portions of the lifting ducts are communicated with the jet windows, the wings are symmetrically arranged at the positions, outside the jet windows, of the two sides of the fuselage, the section of each wing is a cambered surface bulging outwards, and transmission shafts of the airscrews are connected with a power transmission system in the control room; a propelling system comprises propelling ducts, propelling jet pipes and fans, the propelling ducts are close to the rear half part of the fuselage and are symmetrically arranged on the two sides of the fuselage, the rear portions of the propelling ducts are connected with the propelling jet pipes, and the fans are arranged in the propelling ducts. The lifting ducts of the air wing type airflow directional load transportation air vehicle can form directional airflow, the airflow is gather together through the wings to form air wings to rapidly lift up the fuselage, and the air vehicle takes off or descends without being influenced by the surrounding environment and is more flexible and convenient to use.

The invention discloses a material level detecting method and a detection device based on vibration signal of ball mill rotary drum. The invention is characterized in that the method comprises the following procedures: (A) installing a vibration acceleration transducer on the ball mill rotary drum; (B) setting data collection parameters, and calculating a circumferential angle L when the transducer collects a group of data measuring points; (C) determining the circumferential area of the transducer for data collection, and acquiring the relation between the maximum impact point of a steel ball on the ball mill rotary drum and the level; (D) acquiring the impact vibration signal between the steel ball in the drum and the coal, steel ball and steel ball, as well as the steel ball and the drum wall; (E) determining the maximum impact point of the steel ball on the drum; (F) calculating the level value of the ball mill in the state. The detection device comprises a ball mill drum and a vibration accelerator arranged on the ball mill drum. The invention has the advantages of real-time and accurate level detection, and avoidance of influence on measurement results caused by changes of category of coal, water content of coal, particle size of coal and other factors.

The invention discloses a method for determining a cavitation threshold value of liquid metal, and relates to the field of acoustic cavitation of the liquid metal. The method aims to solve the technical problem that the cavitation threshold value of the liquid metal cannot be determined at present. The method comprises the following steps: shooting cavitation characteristics of a parent metal / liquid metal interface in the liquid metal ultrasonic-assisted spreading process by using high-speed photography; after cavitation shooting, measuring the area, where cavitation cannot happen, of the spreading front edge of the liquid drop; simulating the spreading process of the liquid drop through a finite element simulation method, and extracting the sound pressure of the edge of the area where cavitation cannot happen, namely a cavitation threshold value. The method is simple to operate, low in cost and accurate in result; and the method is not limited by liquid metal components and has a wideapplication range. The method is used for determining the cavitation threshold of the liquid metal.