234results about How to "Easy detection" patented technology

The invention discloses a preparation method and application of a concave-structure SERS (Surface Enhanced Raman Scattering) substrate for prostatic cancer exosome detection, and relates to the field of Raman spectrum detection. The invention aims to solve the problems that the quantity of electromagnetic field hot spots of the currently reported SERS substrate with the concave structure is small, the SERS substrate does not have good uniformity, the size is not matched with EVs, the detected EVs signal is relatively weak, and the parting detection requirement cannot be met. The preparation method of the SERS substrate with the concave structure comprises the following steps: 1, preparing a PDMS concave trap structure array; 2, preparing a concave well array of which the surface is covered with densely arranged Au NPs; according to the invention, Au nanoparticles are grown in situ in a PDMS concave structure, a concave trap array of which the size is matched with that of EVs and the surface is covered with densely arranged Au NPs is constructed, high-sensitivity detection (lower detection limit of 105 particles / mL) and high-accuracy typing of prostatic cancer EVs are realized, and the accuracy rate can reach 98% or more.

The invention provides a geological forecasting system and method and an electrode system, and relates to the technical field of geological exploration. The electrode system comprises: a cutterhead configured to cooperate with a backflow electrode to construct an alternating electric field; a plurality of electrode assemblies, each of the plurality of electrode assemblies comprising: a first electrode configured to output a current in the direction of the tunnel face of the construction tunnel; the second electrode is arranged around the periphery of the first electrode; the third electrode is arranged around the periphery of the second electrode, and the first electrode, the second electrode, the third electrode and the cutterhead are arranged in an insulating mode. According to the method, the current signal vertically flowing into the stratum can be used for finely evaluating the stratum in front of the tunnel face, more accurate abnormal information is provided for site construction, and the risk of tunnel construction is greatly reduced.

The invention discloses a mountain tunnel waterproof and drainage structure convenient to maintain and replace and a construction method.The waterproof and drainage structure comprises a primary support, a secondary lining, detachable water guiding and drainage structures and a tunnel bottom drainage structure, an annular groove is reserved in a secondary lining construction joint, and the water guiding and drainage structures are intensively arranged; the water guiding and draining structure comprises a water draining pipe, an annular water draining groove, a water-wave-proof steel pattern plate, a heat preservation material and a decorative plate which are sequentially arranged from outside to inside. The bottom drainage structure comprises transverse drainage ditches and a central drainage ditch. According to the tunnel waterproof and drainage structure, the underground water behind the tunnel lining is basically drained through the capacity of the water drainage pipe for actively reducing the underground water, the underground water is prevented from acting on the supporting structure, permeation of the underground water into the supporting structure is reduced, the construction method is simple and convenient, and the construction quality is easy to control; during tunnel operation and maintenance, desilting, maintenance and replacement are facilitated, and the durability of the tunnel is improved.

The invention provides open pit coal mine goaf detection equipment and a goaf detection method. The open-pit coal mine goaf detection equipment comprises a vehicle frame which is provided with a detection hole; a plurality of telescopic support parts; the pulley assembly comprises a pulley frame and a pulley, and the pulley frame is arranged on the frame; the first winch, the second winch and the third winch are all arranged on the frame; a data integration display device; the drilling television module is used for imaging and detecting a goaf; the three-dimensional laser scanning detection part comprises a three-dimensional laser data receiver, a second transmission line and a three-dimensional laser scanning module; and the sonar detection part comprises a sonar data receiver, a third transmission line and a sonar detection module. Therefore, the open pit coal mine goaf detection equipment has the advantage of being convenient to detect the goaf.

The invention discloses an underwater pipeline robot front end obstacle collision detection device which comprises a mounting disc, a driving disc is rotationally connected to one side of the mounting disc, a driving motor used for driving the driving disc to rotate is mounted on the mounting disc, and a limiting disc connected with the mounting disc is arranged on the side, away from the mounting disc, of the driving disc. The driving disc is provided with a plurality of driving sliding grooves which are distributed in a circumferential mode and inclined. The limiting disc is provided with a plurality of limiting sliding grooves corresponding to the driving sliding grooves in a one-to-one mode. The outer side of the limiting disc is slidably connected with a plurality of detection plates in one-to-one correspondence with the limiting sliding grooves, the inward end of each detection plate is provided with a sliding shaft in sliding connection with the corresponding limiting sliding groove and the corresponding driving sliding groove, and the end, facing outwards, of the limiting sliding groove is provided with a plurality of strain force sensors in one-to-one correspondence with the detection plates. The outward end of each detection plate is rotationally connected with a supporting roller. The front end of the robot is provided with a collision sensing front-end obstacle, so that the front-end obstacle can be more effectively detected.

The invention provides a pomacea canaliculata underwater intelligent identification and active capturing device which comprises a cabin, a capturing mechanical arm and a driving mechanism, the capturing mechanical arm is arranged at the front end of the advancing direction of the cabin, the tail end of the capturing mechanical arm is connected with the cabin, and the driving mechanism is arranged at the rear end of the advancing direction of the cabin. The universal cutting machine is arranged at the front end of the advancing direction of the cabin body, and a master control module, a battery module, a cabin inner container, a first lighting module, a first monitoring and recognition module, a sensor module, an opening and closing door and an exit are arranged in the cabin body; the cabin inner container is connected with an opening and closing door arranged at the top of the cabin body and an outlet arranged at the bottom of the cabin body through two cabin inner container channels. A second monitoring and recognition module and a second lighting module are further arranged at the front end of the advancing direction of the cabin body. According to the device, aquatic plants or sundries blocking the view field and the path are cleaned, the device freely moves underwater, automatic observation, intelligent recognition, capturing and storage are integrated, the labor cost is reduced, and the environment damage caused by manual capturing work is avoided.

The invention relates to a wireless power transmission circuit and method capable of detecting a wireless power receiver and a foreign matter. The wireless power transmitting circuit includes: a reflux circuit including a plurality of switches coupled to the resonant transmitting circuit; and an emission control circuit for generating a pulse width modulation control signal to control the plurality of switches in a power supply program to generate a wireless emission power supply in the resonant emission circuit to wirelessly supply power to the wireless power receiving circuit, and for controlling the plurality of switches to generate a wireless test power supply in the resonant emission circuit based on the operation frequency in an exploration program. The exploration procedure includes: measuring a peak value of a transmission signal corresponding to the wireless test power supply; judging whether foreign matters exist or not according to the peak value of the transmitted signal; and / or judging whether a wireless power receiving circuit exists or not according to the peak value of the transmitted signal, and performing a power supply program when judging that the wireless power receiving circuit exists.

The protective shell is used for covering a measuring chip of the gas sensor, the protective shell comprises an outer shell and an inner shell arranged on the radial inner side of the side wall of the outer shell, at least part of the inner shell is in sealed connection with the outer shell, and the inner shell is used for covering the measuring chip. A first cavity is formed between the inner wall of the outer shell and the outer wall of the inner shell; a second cavity for accommodating the measuring chip is formed in the inner shell, and an outer air inlet hole for communicating the outside of the outer shell with the first cavity is formed in the side wall of the outer shell; the side wall of the inner shell is provided with an inner air inlet hole communicated with the first cavity and the second cavity, the protective shell is also provided with an air outlet part, and the protective shell is also internally provided with a buffer part for preventing the measurement gas entering the first cavity and / or the second cavity from flowing. The gas sensor solves the problems that in the prior art, the gas flow rate and pressure are difficult to stabilize, and the measurement precision of the gas sensor is low.

The invention belongs to the technical field of information encryption, and discloses a photoelectric detector based on an anisotropic photo-thermoelectric material, a preparation method and an encryption method, the prepared photoelectric detector is very small in size and suitable for miniaturization application, the material can be conveniently integrated into miniature electronic equipment, the integration level of the equipment can be improved, and the cost can be reduced. The material has remarkable advantages in the field of microelectronics, especially in the aspects of reducing the size of a device and improving the integration level. The photoelectric detector based on the anisotropic photo-thermoelectric material generally has high sensitivity, is beneficial to detection of weak optical signals, has excellent photoelectric conversion performance, and can realize efficient photoelectric detection. According to the encryption method provided by the invention, through diversified combinations of the preset polarization angles and positions, different information can correspond to different polarization angle and position combinations, so that the system has very high flexibility and expandability, and the generated secret key has high complexity and uniqueness.

The invention discloses a drone detection system based on radar scanning and visual coverage, comprising a drone body, a detection radar and a visual detection device at the bottom of the drone body, the detection radar and the visual detection device are both connected to the flight control system of the drone body, and the left and right sides of the drone body are respectively provided with pneumatic buffer racks, which are controlled by the flight control system. The drone detection system based on radar scanning and visual coverage provided by the invention integrates radar scanning detection and high-altitude camera detection, and has a good detection effect.

The invention discloses a waste road fence dismantling robot for municipal engineering, and relates to the technical field of dismantling robots. The device comprises a crawler-type chassis, a dismantling vehicle body is installed on the top of the crawler-type chassis in a driving mode, an electric main push rod is fixedly installed on one side of the dismantling vehicle body, and a vertically-arranged lifting electric push rod is fixedly installed at the telescopic end of the electric main push rod; the telescopic end of the lifting electric push rod is arranged downwards and fixedly provided with a steering mechanical arm, and the driving end of the steering mechanical arm is fixedly provided with a horizontally-arranged connecting cantilever. When a fence stand column buried underground is pulled out, a slotting drilling machine drives a drill bit to drill a circle of bucket-shaped groove in the circumferential side of the stand column, then an electric main push rod, a lifting electric push rod and a drilling machine electric push rod are reset, automatic machining of the bucket-shaped groove in the top end of the stand column is completed, and the pulling-out frame assembly can be stably connected with the stand column in a clamped mode through the bucket-shaped groove; and the top end of the upright post cannot be unhooked in the pulling process without pre-punching and threading.

The invention discloses a road crack segmentation method and device based on deep learning, electronic equipment and a program product. According to the method, two collaborative and functional complementary processing paths are adopted to perform parallel processing on a to-be-segmented image so as to obtain corresponding feature information: on one hand, the to-be-segmented image is converted into a feature sequence containing spatial position information, and global semantic modeling is performed on the feature sequence; global semantic features representing the overall shape of the crack and long-range semantic dependence are obtained; and on the other hand, local texture and edge detail information of the crack is directly extracted from the to-be-segmented image, and detail enhancement features are obtained. Thirdly, fusing the global semantic features and the detail enhancement features to obtain target fusion features considering crack positioning, connectivity and boundary and texture expression; according to the segmentation result output based on the target fusion features, even tiny cracks can be effectively depicted, and then the continuity, boundary definition and robustness of tiny crack segmentation under the complex road background can be improved.

The invention discloses a coal mine underground radio wave omnidirectional receiving system, which belongs to the technical field of radio wave receiving, and comprises a multi-frequency transmitting module, a high-sensitivity receiving module and a receiving monitoring module, the output end of the multi-frequency transmitting module is connected with the input end of the high-sensitivity receiving module, and the output end of the high-sensitivity receiving module is connected with the receiving monitoring module. The output end of the high-sensitivity receiving module is connected with the input end of the receiving monitoring module, and the output end of the receiving monitoring module is connected with the input end of the data analysis module; according to the invention, the phase-locked loop amplification circuit, the self-adaptive gain control circuit and the DSP digital processing circuit are arranged in the weak signal processing circuit, so that weak analog signals can be well extracted, automatically amplified and then converted into digital signals, the amplification factor can be automatically adjusted according to field conditions, and the signal receiving sensitivity and the signal-to-noise ratio are improved; and a DFT discrete Fourier transform method is adopted in the DSP digital processing circuit, so that the signal processing precision is greatly improved.

The invention belongs to the technical field of computational imaging, and particularly relates to an ultraviolet single-pixel computational optical imaging system based on quantum dot down-conversion. The system comprises an ultraviolet emission module, an ultraviolet down-conversion module, a spatial light coding module and a single-pixel imaging module. Under the condition of unique photoelectric characteristics of the quantum dots, high-efficiency wavelength conversion in a wide spectrum range can be realized, so that ultraviolet wavelength is converted into visible light wavelength; based on a digital micromirror array spatial light modulator, binary phase modulation can be performed on light, so that light coding information is transmitted; based on a single-pixel imaging technology, imaging with a wider dynamic range and higher sensitivity can be realized. Compared with a traditional area array detection imaging mode, the method has the advantages that only one single-pixel detector without spatial resolution is used for recording image information, and imaging can be carried out under the complex conditions of low illumination and scattering of a detection path.

The utility model provides a micro-area femtosecond transient absorption detection system. A femtosecond laser light source control assembly is used for generating laser; the first spectroscope is used for dividing the femtosecond laser into two beams of light; the pump light adjusting assembly is used for generating pump light and adjusting intensity and frequency; the detection light adjusting assembly is used for generating detection light and adjusting the intensity of the detection light to be proper and stable; the beam combiner is used for combining the pump light and the detection light; the transmission absorption detection assembly is used for irradiating a sample with the pump light and the detection light and generating detection transmission light; the reflection absorption detection assembly is used for irradiating the pump light and the detection light to a sample and generating detection reflected light; the microscopic imaging assembly is used for carrying out microscopic observation on the sample area and determining a to-be-detected position, and determining that the pump light and the probe light are accurately irradiated on the to-be-detected position; the detection assembly is used for collecting detection light. According to the utility model, ultrahigh space and time resolution is realized, and functions of transmission transient absorption detection, reflection transient absorption detection and micro-area microscopic imaging are integrated.

The invention discloses a novel microroot canal root phenotype detection method based on water-soluble holing, which comprises a water-soluble holing mechanism, the water-soluble holing mechanism sprays water and holes in plant root soil, and the water-soluble holing mechanism comprises a water tank, a stacking groove plate, a communicating hole, a water inlet and outlet hole, a sealing cover, a water conveying pipe, a water pressure regulating valve, a water pump, a water spraying head, a connecting hole and a water spraying hole. The water conveying pipe is wound on the outer portion of the slurry suction pipe, the water spraying head is connected with the slurry suction short pipe, the water spraying head sprays water to punch holes in soil at the roots of plants, the slurry suction short pipe sucks away slurry, then the transparent root pipe is placed in the holes, and the transparent root pipe is placed in the holes. Shooting is carried out after the shooting position of the macro camera is adjusted, so that plant root system images can be conveniently collected, after collection is completed, the transparent root canal is taken out, the hole is filled with slurry in the slurry storage tank again, the plant root system is buried, and damage to the plant root system is reduced.

The invention discloses a crack detection device for constructional engineering metering detection, the crack detection device comprises a supporting base, a rotating table, a supporting frame, a driving assembly and an ultrasonic detection device, the rotating table is rotatably arranged on the supporting base, a mounting seat is arranged at the upper end of the rotating table, and a rotating shaft is arranged at the lower end of the supporting frame; the supporting frame is hinged to the mounting base through a rotating shaft, the driving assembly is arranged in the supporting frame, the ultrasonic detection device is mounted on the driving assembly, and the driving assembly is used for adjusting the displacement of the ultrasonic detection device. The invention relates to the technical field of constructional engineering detection equipment, in particular to a convenient-to-use crack detection device for constructional engineering metering detection, and the crack detection device can be conveniently adjusted, so that cracks of a building wall surface or ground can be flexibly detected, and detection data can be transmitted in real time; and the detection flexibility, convenience and efficiency are improved.

This invention provides a method for hypertension risk assessment, relating to the field of epigenetic detection technology. It includes: performing event alignment and residual modeling on a qualified signal set to establish a base probability at the locus level and forming baseline features through neighborhood consistency screening; constructing a tunneling sensitization model and contextual attention, fusing discriminative and generative evidence to obtain enhanced features; quantifying IGF2BP3 and aligning and fusing it with the enhanced features; constructing an IGF2BP3-mediated metabolic network based on this, performing time-series modeling and stability assessment, and extracting final-state features; fusing the final-state risk vector with multi-gene scores to complete adaptive grading and compliant report generation. This method is robust, interpretable, and easy to deploy.

The invention relates to the technical field of elevator light curtains, in particular to a method for identifying transparent, semitransparent and small-size objects and an elevator light curtain. A plurality of first transmitting tubes and a plurality of first receiving tubes are arranged at the TX end of the light curtain, a plurality of second receiving tubes are arranged at the RX end of the light curtain, the first transmitting tubes and the first receiving tubes are installed on the same side, infrared rays of reflection and diffuse reflection are utilized, small-size, transparent and semitransparent objects which are not easy to detect are easy to detect, and the detection accuracy is improved. According to the elevator light curtain, through data collection and analysis of a laboratory, the characteristics of common interference information are analyzed, multiple judgment requirements such as the difference value of voltage values, the variation amplitude of the voltage values and the difference of voltage average values under the corresponding distance of detected voltage values are applied, interference signals are eliminated, and the accuracy of the elevator light curtain is improved. Transparent, semitransparent and small-size objects can be accurately judged, and the safety of elevator operation is improved.

The utility model discloses a buoy with a multi-thread quick-screwing structure, and relates to the technical field of fishing appliances, the buoy with the multi-thread quick-screwing structure comprises a buoy body, a multi-thread structure and a light-emitting module, the buoy body comprises an upper buoy body and a lower buoy body, and the lower buoy body is arranged on one side of the upper buoy body; the multi-thread structure is arranged between the upper float body and the lower float body, and the upper float body and the lower float body are in threaded connection through the multi-thread structure; and the light-emitting module is at least partially arranged in the float body. According to the technical scheme provided by the utility model, the problem that the number of rotation turns is large when the upper float body and the lower float body in the existing float body are screwed and fixed is solved.

The invention belongs to the technical field of gravity dam topographic survey, and particularly relates to topographic survey equipment for concrete gravity dam modeling, which comprises a survey main body, a driving assembly arranged on the survey main body, a signal enhancement type earth surface pretreatment mechanism and a gravity compensation type self-adjusting survey mechanism, the signal enhanced earth surface preprocessing mechanism is arranged on one side of the lower end of the surveying main body, and the gravity compensation type self-adjusting surveying mechanism is arranged on the other side of the lower end of the surveying main body; according to the topographic survey equipment for concrete gravity dam modeling, signal attenuation and vegetation, especially vegetation containing a large amount of water, can be reduced through the signal enhancement type earth surface preprocessing mechanism, electromagnetic waves of a geological radar can be absorbed and attenuated, after the vegetation is cleaned, signal attenuation can be reduced, the penetration depth of radar signals can be increased, and therefore the effect of modeling of the concrete gravity dam is achieved. Therefore, the underground structure can be better detected.

The invention relates to a high-definition X-ray imaging system based on a super lens. The high-definition X-ray imaging system comprises a scintillator, an imaging lens group and an imaging module, the scintillator converts incident X-rays into visible light, the visible light is focused through the imaging lens group, and the imaging module performs image acquisition; the imaging lens group comprises a lens group, a super lens and a reflective mirror; the full width at half maximum of the luminescence peak of the scintillator is within the range of + / -10nm of the working wavelength of the super lens; by introducing the super-lens with the characteristics of miniaturization, light weight, integrability and multifunction, higher spatial resolution imaging can be obtained, integration is facilitated, the difficulty in the prior art is solved, and the super-lens has important significance in promoting the practicability of the super-lens.

The invention relates to a human immunodeficiency virus detection device and a preparation method thereof, and belongs to the technical field of biomedical detection. The sample pad, the combination pad, the reaction tank pad, the cellulose membrane and the water absorption pad are sequentially overlapped and pasted on the bottom plate according to the chromatography direction to form the detection device, the reaction tank pad is made of one or more of glass fibers, polyester fibers and cellulose materials, and the reaction tank pad is obtained by soaking the reaction tank pad in a reaction tank pad treatment solution and then drying the reaction tank pad; the reaction tank pad treating fluid comprises 0.01 to 0.2 weight percent of high-molecular polymer and 0.1 to 5 weight percent of saccharide. The detection device provided by the invention has the advantages of high sensitivity and short detection time, particularly, the detection sensitivity of the antigen is higher than the national standard 2.5 IU / mL and the sensitivity of other products in the prior art and can reach 1IU / mL, and the detection device is suitable for clinical and household rapid detection requirements.

The present invention discloses a biosafety collection processor for sputum microorganism detection, wherein an end cap is provided at one end of a cylindrical shell, and the other end is sealed by a back cover, a piston is provided in the shell, the rear end of the piston is connected to one end of a push rod, a guide hole is provided in the center of the back cover, the other end of the push rod extends out of the shell through the guide hole and is connected to a push handle, a waste liquid outlet is provided on the end cap, a partition is provided near the front end of the shell, the partition is a grid-shaped plate, a first filter membrane is fixed on the partition, protruding sample ports are provided on the shells on both sides of the partition, a sponge layer is fixed on the piston, and a scouring pad layer is provided on the facing surfaces of the sponge layer and the partition. The processor has a simple structure, can pre-treat sputum, and can avoid contamination.

The invention belongs to the field of underwater information detection, and particularly relates to a bottom-supported underwater multi-physics-field information detection device, which comprises a mounting rack, an information detection module, a buoyancy module and an information integration module, and is characterized in that the mounting rack comprises an open top-layer three-dimensional frame, a middle-layer three-dimensional frame and a bottom-layer three-dimensional frame, and the top-layer three-dimensional frame is provided with a sound releaser; an anchor block base is movably arranged at the bottom of the bottom-layer three-dimensional frame and is connected with an execution end of the sound releaser, an information detection module of the sound releaser is located on the top-layer three-dimensional frame, and the top-layer three-dimensional frame is of a fully-open and unshielded structure and has higher perceptibility to the outside, so that underwater information can be monitored more easily in an omnibearing and more sensitive manner; however, most of existing similar devices are of semi-closed or closed structures, signal sources received by information detection modules are unidirectional, and if information needs to be monitored in all directions, the information detection modules need to be arranged in multiple directions.

The utility model relates to the technical field of EPS motors, in particular to a waterproof and breathable upper cover of an EPS motor. The motor comprises a motor upper cover, a plurality of air holes and a waterproof breathable film, the plurality of air holes are formed in the motor upper cover, the waterproof breathable film is installed on the motor upper cover in a hot welding pasting mode and covers the plurality of air holes, a fixing piece is arranged on the motor upper cover, the plurality of air holes and the waterproof breathable film are located in the fixing piece, and the waterproof breathable film is arranged on the motor upper cover. And a ventilating valve cover is arranged on the fixing piece. According to the utility model, through the arrangement of the air holes and the waterproof air-permeable membrane, the composition of components required by waterproof air permeability of the whole motor is simplified, the waterproof air-permeable effect of the motor is guaranteed, the waterproof air-permeable membrane is installed in a hot welding pasting mode, the installation convenience of the waterproof air-permeable membrane is guaranteed, the production efficiency of the motor is improved, and the production cost is reduced. And through the arrangement of the fixing piece and the ventilation valve cover, foreign matter can be prevented from entering and adhering to the waterproof ventilation film, and the protection effect on the waterproof ventilation film is improved.

The utility model relates to the technical field of laser beam expanders, in particular to a laser beam expander module convenient to adjust, which comprises a base, the outer wall of one end of the base is rotatably connected with the inner wall of one end of a beam expanding shell, a rotary knob rotates to drive a rotating rod to rotate, and the rotating rod rotates to drive a rotating gear shaft to rotate. The rotating gear shaft rotates to drive the negative lens toothed plate to do linear motion through the meshing effect and the limiting effect of the negative lens limiting plate, the linear motion of the negative lens toothed plate drives the linear motion of the negative lens connecting plate, and the linear motion of the negative lens connecting plate drives the linear motion of the negative lens. The rotating gear shaft rotates to drive the positive transmission toothed plate to linearly move through the meshing effect and the limiting effect of the positive transmission limiting plate, the positive transmission toothed plate linearly moves to drive the positive transmission connecting plate to linearly move, the positive transmission connecting plate linearly moves to drive the positive lens to linearly move, and the distance between the negative lens and the positive lens can be controlled by rotating the rotating knob. The beam expanding size of the laser beam expander is convenient to adjust, and convenience is brought to people to use the laser beam expander.

The utility model relates to the technical field of explosion suppression and fire extinguishing systems, in particular to an adjustable combustible gas concentration detection assembly which comprises a mounting top plate, a connecting buckle plate is slidably mounted at the lower end of the mounting top plate, a first rotating motor is mounted at the lower end of the connecting buckle plate, and a second rotating motor is rotatably mounted at the side end of an assembly frame. A detector body is mounted in the assembly frame, and two red and ultraviolet composite cameras are mounted at the side end part of the detector body. According to the improved detection assembly, a first rotating motor drives a rotating supporting column to rotate so as to drive a mounting clamp, an assembling frame and other parts to carry out left-right visual angle adjustment, and a second rotating motor, a rotating rod, a fixing ring and other parts are matched so that the upper visual angle and the lower visual angle of the device can be adjusted during use; the detection angle can be adjusted in time according to needs when the device is used, so that the concentration of the combustible gas is better detected, and the practicability of the device is improved.

The present application provides a fuzzy testing method and device based on a decision tree, which uses a modified BT template to parse sample data in a target data format, obtains file data in the target data format, generates a decision tree based on the file data, mutates the decision tree, and parses the mutated decision tree to obtain deformed data, and finally runs the target program to parse the deformed data, and determines the system vulnerability based on the running information of the target program. This solution can generate file data in the target data format based on the modified BT template, enrich the format of file data based on demand, and further improve the form of the deformed data obtained by mutating the decision tree, so as to better detect system vulnerabilities and improve the probability of vulnerability discovery.

The utility model discloses an environment detection device for a dust environment, which comprises a hollow box body, a hollow rotating bracket is rotatably connected to the middle of the inner side of the box body, a plurality of hollow measuring heads are fixedly connected to the upper side of the rotating bracket, and an intermittent part is connected to the lower side of the rotating bracket and is used for the rotating bracket to rotate for intermittent time. The lower side of the rotating support is rotationally connected with a bent pipe, the bent pipe is connected with air draft equipment, the upper side of the air draft equipment is fixedly connected with an air supply pipe, and the upper side of the air supply pipe is connected with detection equipment used for detecting dust in air. The dust collection device effectively solves the problem that the detection result of the detection equipment deviates from the true value due to the fact that dust in the air is inconvenient to collect in a multi-direction and high-efficiency mode in the prior art.