25results about How to "Improve the detection effect" patented technology

The invention discloses a method for extracting tumor and infectious disease body fluid free nucleic acid, a kit and application. The extraction method provided by the invention is high in extraction efficiency; through comparison, the extraction quality is 10 times that of a traditional kit. The kit comprises a specific MOF adsorption reagent, a lysis solution, a separating agent and a nucleic acid storage tube, the specific MOF adsorption reagent can capture free nucleic acid in body fluid of a patient through specific immunomagnetic beads, and then the free nucleic acid is separated and extracted through the lysis solution and the separating agent. According to the kit provided by the invention, free nucleic acid in tumor or infectious disease body fluid can be specifically extracted, interference of other normal cell DNA is eliminated, and the kit can be used for scientific research or clinical diagnosis analysis such as PCR amplification, gene expression, gene sequencing, chip detection, library construction and high-throughput sequencing, so that the subsequent detection result is more accurate, and the detection efficiency is improved. And the detection effect is better.

The invention discloses a wide-band-gap semiconductor composite melanin ultraviolet photoelectric detector and a preparation method thereof, and belongs to the field of ultraviolet detection. The problems that an existing organic-inorganic biological hybrid photoelectric detector is difficult to detect weak light in an ultraviolet band, the photoelectric conversion efficiency is low, and a modification method is complex when an organic biological material is integrated into a nano material are solved. The ultraviolet photoelectric detector is composed of a metal Au electrode, a metal In electrode, a melanin layer, a SnO2 layer and FTO conductive glass. The method comprises the following steps: 1, preparing the SnO2 layer; 2, preparing a melanin layer; and 3, preparing an electrode. The invention is used for the ultraviolet photoelectric detector of the wide-band-gap semiconductor composite melanin and the preparation of the ultraviolet photoelectric detector.

The invention discloses an old goaf exploration method based on directional drilling hydraulic fracturing in a coal seam. The method is specifically implemented according to the following steps that 1, a coal seam hydraulic fracturing test is conducted to determine the hydraulic fracturing radius; 2, the directional drilling arrangement distance is determined according to the hydraulic fracturing radius; 3, directional drilling is constructed according to the directional drilling arrangement interval determined in the step 2, segmented hydraulic fracturing is carried out, and data monitoring is carried out in the hydraulic fracturing process; 4, judging the development condition of the old goaf according to the hydrofracture monitoring data; and 5, a subsequent drilling construction scheme is determined according to the communication condition of the directional drilling hydraulic fracturing fracture and the old goaf. The problem that in the prior art, the position of goaf water can only be detected and cleared by increasing the density of the drill holes is solved.

The utility model belongs to the technical field of unmanned vehicles, and discloses an unmanned vehicle detection device. The unmanned vehicle detection device comprises a cover body, a bonding assembly and a mounting assembly. Wherein a mounting space is formed in the cover body, a detection opening and a camera opening are formed in one side of the cover body, and the detection opening and the camera opening are both communicated with the mounting space; the bonding assembly is bonded to the installation space of the cover body, the radar is arranged on the support, the detection end of the radar right faces the detection opening, the support is connected with the bonding assembly, and the bottom of the support is connected to the unmanned vehicle. The installation assembly is connected to the bonding assembly and used for installing a camera, and the photographing end of the camera can directly face the camera shooting opening. The device is simple in structure and low in assembly difficulty, and can be directly and integrally mounted on the unmanned vehicle, so that a good detection effect is ensured.

The utility model provides a medical lamp and medical equipment, and relates to the technical field of medical equipment, the medical lamp comprises a shell, a shielding piece, a light assembly and an adjusting mechanism, the light assembly comprises a light-emitting element; the shielding piece is movably arranged on the shell, and the movement track of the shielding piece has an avoiding position where the light-emitting element is not shielded and a shielding position where at least one part of the light-emitting element is shielded; the adjusting mechanism is arranged on the shell and connected with the shielding piece in a transmission mode, and the adjusting mechanism can drive the shielding piece to move between the avoiding position and the shielding position. By adjusting the relative position of the shielding piece, the light-emitting element can be shielded by the shielding piece, so that the purpose of regulating and controlling the illumination intensity and the illumination range of the light-emitting element is achieved, light emitted by the light-emitting element can meet the use requirement, a doctor can better observe the detail situation of a focus part, the examination effect is improved, and the examination efficiency is improved. Stimulation to eyes of doctors and patients is reduced, and examination experience is improved.

The present invention discloses a method for collecting accurate three-dimensional coordinate data for underground trenchless traction pipes, comprising the following steps: Step 1, using an inertial gyroscope to locate the pipeline: placing an in-pipe measurement unit carrying a heading and attitude sensor into a channel and moving it along the channel, measuring the heading and pitch angle of each position in the channel, combining the heading, attitude information with the mileage information to deduce the three-dimensional coordinates of the channel. The present invention has a good detection effect for non-metallic pipelines such as trenchless traction pipes that are buried deep and have constantly changing paths and depths, and can provide data support for cross construction, etc. For underground pipelines such as trenchless traction pipes that are buried deep, the three-dimensional coordinates of the pipelines can be collected accurately and quickly, and the accuracy meets the requirements of cross construction.

The invention relates to an air coupling dual-polarization combined radar antenna and a transceiving method thereof, belongs to the technical field of ground penetrating radar antennas, and solves the problems of low gain and poor air coupling detection effect of a radar antenna in the prior art. According to the invention, four same antenna units are orthogonally combined to form the dual-polarized combined antenna with two transmitting and two receiving; the four antenna units comprise a first transmitting antenna, a first receiving antenna, a second transmitting antenna and a second receiving antenna; the first transmitting antenna and the first receiving antenna are bilaterally symmetrical; and the second transmitting antenna and the second receiving antenna are vertically symmetrical. The radar antenna provided by the invention adopts an air coupling system, is stronger in directivity and higher in efficiency, can couple more energy into a to-be-detected target body, is suitable for air coupling ground penetrating radar application, and is better in detection effect.

The invention belongs to the technical field of signal investigation, and particularly relates to a small unmanned aerial vehicle investigation system and method based on weak signals, and the system comprises a radio monitoring module, an investigation positioning module, a control module, a sound wave monitoring module, a sound wave amplification module, a sound wave equipment information module, a scheme refining module and an effect ratio module. Through the arrangement of the sound wave monitoring module, when weak signals in the investigation range are monitored, not only can the electromagnetic environment when the weak signals appear be monitored, but also the fluctuation environment when the weak signals appear can be monitored, so that the unmanned aerial vehicle can be investigated more accurately, a user can customize a sensitive threshold value, and the detection accuracy is improved. The method adapts to different investigation scenes and requirements, can improve the attention and investigation effect on specific weak signals, can obtain the information and precision of different sound wave monitoring devices, can generate a precision compensation scheme and analyze a matching value, can give full play to the potential of the devices, and can avoid resource waste while improving the monitoring precision.

The invention provides a high temperature resistant wave-transparent wing structure and an aircraft, the high temperature resistant wave-transparent wing structure comprises a wing skeleton, a lower skin, a wingtip structure, an adjusting band plate and an upper skin, the skin can be independently used as the skin, and the skin and an antenna can be integrally formed and then installed on the wing skeleton in a blocking manner. And when the wing skin is independently used as the skin, the antenna is mounted on a spar and a side rib of the wing framework. The high-speed flight platform wingtip structure and the antenna can be integrally formed into a wingtip antenna integrated structure, and the high-speed flight platform wingtip structure and the antenna can also be independently prepared into a wingtip antenna separated structure. A connector, a secondary spar, a wing rib and a bevel edge rib of the wing framework are made of high-temperature-resistant resin-based composite materials, and a main spar, a main wing rib and a rear main spar are made of high-temperature-resistant titanium alloy materials. According to the technical scheme, the technical problems that in the prior art, titanium alloy is adopted as a wing bearing structure material, the wave transmission performance is not achieved, and the early warning detection capacity of a high-speed flight platform is greatly restricted are solved.

The invention provides a feature extraction and detection method for cloth defects, and relates to the technical field of cloth quality detection.The feature extraction and detection method comprises the steps that a graying image of to-be-detected cloth is obtained and subjected to frequency domain analysis, so that the main frequency and the main weaving direction angle of a first cloth image are obtained; phase response of the first cloth image under the main frequency and the main weaving direction angle rhythm is determined; for each pixel point, acquiring a nearest pixel point of the pixel point in the direction of the main weaving direction angle, analyzing the forward propagation condition of the pixel point in combination with the phase response of the pixel point and the nearest pixel point of the pixel point, setting a propagation smoothness judgment condition, and screening out unsmooth propagation pixel points based on the propagation smoothness judgment condition; for each pixel point with unsmooth propagation, analyzing the reverse propagation condition of the pixel point, and combining the forward propagation condition to obtain a back-and-forth propagation deviation; and analyzing the forward propagation condition in the local area of each unsmooth-propagation pixel point, and detecting the cloth defects in combination with the back-and-forth propagation deviation.

The present invention discloses a method for obtaining information on missing seedlings in an artificial nursery forest, comprising obtaining an orthophoto of the nursery, processing the image to obtain a crown binary image; using a grid algorithm to calculate the inclination angle of a nursery row, and according to the calculation result of the inclination angle, rotating the crown binary image clockwise to make the nursery row in a horizontal position; using a centerline method to calculate the number of missing seedlings in each row and the position of missing seedlings in each row, obtaining data on missing seedlings in each row; summarizing the data on missing seedlings in each row, that is, obtaining the overall number of missing seedlings and overall missing seedling position data. The grid-variance method proposed in the present invention can correctly calculate the inclination angle of the nursery row, so that the inclined image of the nursery row can be rotated to the horizontal position of the nursery row, which is convenient for forestry workers to find trees by row position, and then facilitates seedling replacement, ensures the growth quality of eucalyptus forests, and increases farmers' income.

The utility model discloses a kind of four-split high-voltage transmission line high-altitude x-ray detection devices, including walking assembly and detection component, the walking assembly includes rack and drive wheel, flexible hanging point is equipped on the rack, the drive wheel is connected in the rack, the drive wheel is driven by drive motor, the detection component includes X-ray installation box and imaging plate, there is X-ray machine in the X-ray installation box, the X-ray machine and the imaging plate are arranged in parallel, camera is equipped in the X-ray installation box, horizontal shift component is equipped on the rack, lifting assembly is equipped on the horizontal shift component, the detection component is connected in the lifting assembly, the horizontal shift component drives the detection component transverse movement detection, the lifting assembly drives the detection component longitudinal movement detection, the application is mainly convenient for flaw detection, simple and efficient, and flaw detection effect is good.

The application discloses a PICU seizure detection system and a storage medium, and a program is stored on the storage medium. When the program is executed by a processor, the following steps are implemented: real-time acquisition of electroencephalogram data, electrocardiogram data and electromyogram data of a subject with epilepsy; segmentation of the electroencephalogram data into multiple electroencephalogram data segments, and detection of each electroencephalogram data segment to obtain suspicious electroencephalogram data segments; acquisition of electrocardiogram data segments and electromyogram data segments according to the suspicious electroencephalogram data segments, and feature extraction of the suspicious electroencephalogram data segments, the electrocardiogram data segments and the electromyogram data segments to obtain electroencephalogram suspicious segment features, electrocardiogram suspicious segment features and electromyogram suspicious segment features; and detection of whether the suspicious electroencephalogram data segments are real seizure segments.

The invention relates to a nucleic acid amplification and chromatographic detection kit based on ureaplasma urealyticum in a totally-enclosed card box and application of the kit, the kit is a kit based on an RPA isothermal amplification chromatography technology, a freeze-drying ball reagent, a liquid reagent and a nucleic acid detection chromatographic test strip are arranged in the kit, the amplification mode is RPA isothermal amplification, and the detection sensitivity is high. The detection mode is a chromatographic test strip, the 5'end of a probe of the ureaplasma urealyticum RPA is marked with digoxin, and the 5 'end of a downstream primer is marked with biotin. The 5'end of the RPA probe of the internal standard substance bacillus is marked with FAM, and the 5 'end of the downstream primer is marked with biotin. Two indexes of UU and reference genes can be simultaneously amplified in the same tube through an RPA isothermal amplification method, an amplification product is double-stranded DNA with molecular markers at two ends, compared with fluorescent PCR, the kit integrates nucleic acid extraction, amplification and detection, the nucleic acid extraction, amplification and detection are all carried out in a card box in a sealed mode, a sample adding step is not needed, operation is simple, pollution can be effectively prevented, and the kit is suitable for large-scale popularization and application. And automation of the whole process is realized.

The invention discloses a steel rail welding seam flaw detection scanning device and a flaw detection method thereof. The steel rail welding seam flaw detection scanning device comprises a scanning support, a guide rail sliding block mechanism and a guide rail probe mechanism, wherein the scanning support can be mounted on a steel rail in a falling manner and is automatically positioned on the steel rail or is automatically separated from the steel rail through lifting; the guide rail sliding block mechanism comprises a first guide rail arranged in the length direction of the steel rail, a guide rail sliding block arranged on the first guide rail and a sliding block driving mechanism used for driving the guide rail sliding block to reciprocate along the first guide rail, and a rail surface probe capable of being attached to the rail surface of the steel rail is fixed to the bottom of the guide rail sliding block. The second guide rail is located below the first guide rail and is parallel to the first guide rail, the probe support is arranged on the second guide rail in a sliding mode, a rail side probe is fixed in the probe support, the guide rail sliding block can drive the probe support to reciprocate along the second guide rail, and the guide rail probe mechanism and the scanning support are of a linkage structure. The steel rail welding seam flaw detection scanning device and the flaw detection method based on the same are convenient and efficient to operate.

The utility model provides a kind of for hoist and draw machine's multiple degrees of freedom wire rope flaw detector supporting device.The supporting device includes support groove frame, flaw detector installation slide and wire rope guiding mechanism, and the support groove frame is including two parallelly arranged vertical boards;The flaw detector installation slide includes two groups of parallelly arranged sliding supports, and two groups of sliding supports are respectively slidably connected with the two vertical boards of support groove frame, the wire rope flaw detector is placed between the two vertical boards of support groove frame, and two groups of sliding supports are respectively fixedly connected with wire rope flaw detector by connecting bolt;The wire rope guiding mechanism includes two groups of guiding components, and two groups of guiding components are respectively located at the upper and lower orifices of wire rope flaw detector threading hole.The utility model can let flaw detector freely move with wire double rope in left and right directions, can detect wire double rope at any time, avoids fixed flaw detector to lose target easily, leads to existence flaw detection loss, affects the accuracy of flaw detection.

The invention provides a vehicle information acquisition system, which comprises a light source used for emitting a detection light beam to a vehicle of which information is to be acquired; the image acquisition module is used for receiving signal light reflected by the detection light beam after the detection light beam passes through the vehicle through gating exposure; and the control module is connected with the light source and the image acquisition module, is used for controlling the relative time of the detection light beam emitted by the light source and the gating exposure of the image acquisition module based on the distance between the vehicle and the vehicle information acquisition system, and is also used for processing the signal light to obtain the to-be-acquired information.

The utility model discloses a measurement type pyrolysis particle fire hazard detector for an electric power system. The measurement type pyrolysis particle fire hazard detector comprises a sampling pipe mechanism, a detection main body mechanism and at least one self-cleaning filtering mechanism. The measurement type pyrolysis particle fire detector for the electric power system has an excellent detection effect aiming at the situation that the electric power system is blocked or is hidden in position, and open fire or smoke is difficult to recognize or detect, the external sampling pipe mechanism is more accurate in smoke recognition, and multi-branch detection is more efficient. By means of the arrangement of the two-way fan, active air suction type extremely-early-stage accurate detection can be achieved, the filtering effect can be achieved by means of the arrangement of the self-cleaning filtering mechanism, and impurity interference is avoided. Through cooperation of the bidirectional fan and the self-cleaning filtering mechanism, the self-cleaning effect of the self-cleaning filtering mechanism can be achieved, the service life of the fire detector is prolonged, the maintenance cost is saved, and the fire detector is reasonable in structure, convenient to install and easy to use.

The application provides a self-adaptive adjustment distributed optical fiber vibration sensor method, system and device, which is applied to the field of optical fiber sensing technology and comprises the following steps: receiving parameters of a DVS, selecting a monitoring mode applied by self-adaptive adjustment according to the received parameters of the DVS, the monitoring mode comprising a full-line measurement mode and a local measurement mode, calculating average light intensity and interference coefficient of a preset reference optical fiber section, judging whether the average light intensity is within a preset range, if yes, judging whether the interference coefficient is within a preset range, if yes, demodulating and calculating a vibration signal and positioning information, matching state information and early warning information according to a preset algorithm model, and displaying the output state information and early warning information. The application adopts the DVS to adaptively adjust line parameters after the optical fiber is connected to realize the best monitoring effect, and the DVS is changed from professional and complex to simple and easy to use without complex debugging by professional technicians.

The invention discloses an image detection method and device, an electronic device and a storage medium. The method comprises the steps of obtaining a to-be-detected image; inputting the to-be-detected image into the normal detection model to obtain a first confidence coefficient for the to-be-detected object; inputting the to-be-detected image into the defect detection model to obtain a second confidence coefficient for the to-be-detected object; and based on the first confidence coefficient and the second confidence coefficient, obtaining a detection result about whether the to-be-detected object in the to-be-detected image is abnormal or not. Due to the introduction of a normal detection model, the method has a better detection capability for unseen defects, and reduces missing detection.

The present application relates to an underwater target intelligent electromagnetic detection method and system, belonging to the geophysical exploration and object detection technical field. The electromagnetic detection subsystem collects underwater electromagnetic signals; the electromagnetic data preprocessing unit decomposes the underwater electromagnetic data samples into time domain signal sequences, frequency domain power spectrum signal sequences and time-frequency power spectrum diagrams; the time domain signal depth learning network identifies whether there is an underwater target according to the time domain signal sequences; the frequency domain power spectrum signal depth learning network identifies whether there is an underwater target according to the frequency domain power spectrum signal sequences; the time-frequency power spectrum signal depth learning network identifies whether there is an underwater target according to the time-frequency power spectrum diagrams; according to the identification results of the underwater target by the time domain signal depth learning network, the identification results of the underwater target by the frequency domain power spectrum signal depth learning network and the identification results of the underwater target by the time-frequency power spectrum signal depth learning network, the final time-frequency power spectrum diagram labeled underwater target identification result is generated by comprehensive judgment.

The invention belongs to the technical field of medical instruments, and particularly discloses a miniature fluorescence microscopic imaging and automatic counting system for onychomycosis detection. The system comprises an integrated handheld sampling imaging terminal, a cloud intelligent analysis server and a user interaction terminal. The terminal integrates sampling, fluorescence labeling and microscopic imaging functions, automatically completes sample processing and image acquisition, and uploads the sample processing and image acquisition to the cloud. And the server performs automatic identification, segmentation and counting of fungal targets on the image through a deep learning algorithm to generate a detection report. According to the invention, mechanical sampling, microfluidic fluorescence labeling and miniature fluorescence microscopic imaging are highly integrated in the handheld terminal, a closed and automatic sample processing and imaging assembly line is constructed, and the problem of leak detection caused by insufficient sampling depth and inconsistent dyeing operation in a traditional method is solved.

The present application discloses a control method, device, equipment and storage medium for a water-air reconnaissance device, and relates to the technical field of water-air drones. The method comprises: an underwater carrier obtains a first reconnaissance instruction; according to the first reconnaissance instruction, the winch is controlled to release the strand, so that the water-air reconnaissance device floats up through buoyancy; if the water-air reconnaissance device is in a floating state on the water surface, a take-off instruction is sent to the reconnaissance aircraft; the reconnaissance aircraft controls the rotation speed of the rotor according to the take-off instruction, so that the first lift provided by the rotor is greater than the sum of the gravity of the reconnaissance aircraft and the tension required for the soft hook to reach a preset deformation degree, and the tension required for the soft hook to reach a preset deformation degree is less than the gravity of the buoyancy body, and under the action of the first lift, the spring mechanism is in an elongated section stuck state; after the reconnaissance aircraft is separated from the buoyancy body, the reconnaissance aircraft conducts reconnaissance on the target object, obtains reconnaissance data, and sends it to the underwater carrier. The method can reduce the energy consumed by the water-air reconnaissance aircraft during the take-off stage.

The present invention discloses a laser radar scanning method and a computer-readable storage medium. The method comprises: a first light deflection device deflects a light beam emitted by a light source by a plurality of first deflection angles along a first direction; the length of the light beam emitted by the light source along the first direction is less than the length along a second direction; a second light deflection device deflects the light beam deflected by the first light deflection device by a plurality of second deflection angles along a first direction and a second direction to project a scanning light beam; the length of the scanning light beam in the first direction is less than its length in the second direction; the second deflection angle of the incident light beam deflected by the second light deflection device is adjusted by controlling the working voltage applied to the second light deflection device, and the corresponding working voltage applied is fine-tuned according to the incident angle of the light beam incident on the second light deflection device; wherein, for the same second deflection angle, different incident angles correspond to different working voltages.

This invention discloses a high signal-to-noise ratio (SNR) ultrasonic imaging method for internal defects in materials. By utilizing the spatial coherence of the received signals from each channel in the full matrix data and modifying the delay rule of the algorithm based on the surface configuration characteristics of PBX (partially filled composite material), high SNR imaging of crack defects with different orientations in PBXs with curved surface configurations is achieved. The quality of the reconstructed images is compared and evaluated. The results show that, compared with traditional linear synthetic focusing imaging, the algorithm proposed in this invention improves the SNR of ultrasonic reconstructed images of crack defects in particulate-filled composite material PBX by more than 10 dB, significantly improving the detection capability of crack defects while maintaining imaging efficiency.