36results about How to "Realize fine detection" patented technology

The invention relates to a construction method for an ionospheric three-dimensional probe satellite-bone SAR imaging processing platform, comprising the twelve steps of: step 1: initiating parameters and reading echo signal; step 2: carrying out orientation transformation toward Fourier; step 3: multiplying by Chirp Scaling (CS) factors; step 4: carrying out distance transformation toward Fourier; step 5: multiplying by distance compensation factors; step 6: carrying out distance inverse transformation toward Fourier; step 7: multiplying by orientation compensating factors; step 8: carrying orientation inverse transformation toward Fourier; step 9: multiplying by orientation Deramp factors; step 10: carrying out orientation transformation toward Fourier; step 11: carrying transverse toward Fourier; and step 12, outputting three-dimensional compression signals. The invention has the advantages of compact structure and fast processing speed, can generate three-dimensional distribution images with high resolution, realizes three-dimensional fine observation of an ionospheric irregular body on a top layer, lays solid technical foundation for developing new-generation ionospheric space environment detection load systems, and has wide practical value and application prospect.

The invention discloses a networking detection method and system based on array weather radars, and relates to the field of phased array weather radars. The system comprises a data processing center and N array weather radars, N is greater than or equal to 3, the N array weather radars are distributed according to a preset triangular rule, and any three adjacent array weather radars are located atthree apexes of a triangle. The N array weather radars are used for synchronously scanning and detecting weather phenomena within the detection range, the data processing center is used for controlling the N array weather radars and obtaining detection results. According to the networking detection method and system based on the array weather radars, full-airspace three-dimensional wind field information within the observation range can be effectively obtained, the microburst phenomenon is effectively monitored, the existing meteorological observation level is greatly improved, and the application requirements of meteorological research and guarantee and the like are met.

A bearing fault detection method includes six steps of collecting signals, obtaining the fault character frequency, conducting analysis, conducting filtering, extracting thresholds and distinguishing faults. The method has the advantages that the characteristic result of an envelope spectrum is extracted by comprehensively using a power spectrum and wavelet conversion, whether a line spectrum in the bearing detection process is an interference spectrum or a fault line spectrum is judged, and the bearing detection efficiency and accuracy are effectively improved. The method is simple, small in calculation amount and easy to achieve, the detection result can be displayed in a computer in real time, and the automated and intelligent bearing detection is completely achieved.

The invention provides a fault detecting device and method for an electric vehicle and a high-voltage interlocking system thereof. The high-voltage interlocking system comprises a high-voltage connecting plug-in member, a male end of the high-voltage connecting plug-in member is provided with a first contact and a second contact, a female end of the high-voltage connecting plug-in member is provided with a third contact and a fourth contact, the first contact cooperates with the third contact, the second contact cooperates with the fourth contact, the device comprises a voltage dividing unit,a first signal collecting end, a second signal collecting end and a control unit, the control unit respectively collects voltages of the first signal collecting end and the second signal collecting end to generate a first voltage value and a second voltage value, according to the first voltage value and the second voltage value, a connection status of the high-voltage connecting plug-in member isjudged, thereby effectively detecting the abnormal connection of the high-voltage connecting plug-in member, a strong guarantee for the subsequent development of refined fault handling measures is provided, and the driving experience of a driver is improved.

The invention discloses a nondestructive measuring method for the intension of a live standing tree. The method includes the steps that: step one, a live standing tree to be measured is selected, and the spread velocity V of a mechanical wave is measured at an area to be measured; step two, a consecutive and integrated tree core with diameter of 3 to 12 mm is taken radially in the area to be measured; step three, the mass of the tree core is weighted and the volume of the tree core is measured on the spot, thereby obtaining the density Rho of the tree core; step four, an elastic modulus Ed is calculated according to the formula that E is equal to V<2>Rho; wherein, the Ed is the elastic modulus of the live standing tree. The invention can perform examination without needing to cut down the live standing tree, not only the detection efficiency is high, but also the detection labor intensity is small.

The invention discloses an infrared weak and small target detection method based on space-time joint local contrast, and relates to the field of infrared image processing and weak and small target detection. The method comprises the following steps: S1, constructing a sliding window with the size of 3*3, traversing a kth frame of image of an original sequence image, and obtaining a spatial domainlocal contrast response graph of the kth frame of image through spatial domain filtering; S2, calculating a variance value St of a continuous frame image, and obtaining a time domain local contrast response graph of the kth frame of image through time domain filtering in combination with variance value images of three adjacent frames of images; and S3, performing normalization processing on the time domain detection result and the space domain detection result, and combining the time domain detection result and the space domain detection result in a multiplicative fusion mode to obtain a space-time joint local contrast response of the kth frame of image. According to the method, spatial information and time information are fully utilized, the problems of low infrared weak and small targetdetection precision, scene robustness and the like caused by an existing method are solved, the detection performance and the low false alarm rate in infrared weak and small target detection under a complex background are improved, and the robustness of an algorithm is improved.

The invention discloses an inertial navigation assisted meteorite crater coarse-to-fine detection method, and belongs to the technical field of deep space exploration. The implementation method comprises the following steps: achieving meteorite crater image feature edge coarse extraction based on bright and dark region information; and searching the matching degree of the template and the image features by using fast Fourier transform so as to achieve coarse positioning of the area where the image features are located. Inertia measurement information is introduced to calculate the overlappingarea between images, the template shape is updated, and a search area is predicted. Fine detection of the single meteorite crater is achieved in the area where the single meteorite crater is located,so that topography information of a landing area is sensed, and accurate and safe landing of the lander is guaranteed. According to the method, the difficulties that the features cannot be detected and the recognition efficiency is low due to affine transformation and information redundancy among the sequence image features can be solved. The method is not only suitable for planet landing and small celestial body detection tasks, but also suitable for moon detection tasks.

The invention discloses a full-polarization laser radar system used for detecting shapes of particles. The laser radar system comprises a polarization light generation system, a receiving system, a polarization analysis system and a data acquisition processor. The invention also discloses a detection method of the full-polarization laser radar system used for detecting shapes of particles. The detection method is characterized in that by use of the full polarization laser radar system to carry out detection, an atmosphere back scattering Miller matrix is obtained; and then the atmosphere backscattering Miller matrix carries out detection on atmosphere particle shapes. According to the invention, by use of all-directional linear polarization laser and circular polarization laser to detectaerosol particles, fine discrimination and detection are performed on the shapes of atmosphere particles; fine measurement is performed on cloud particles in the atmosphere; and the method is used foranalyzing ice water phase states of the cloud particles and particle guidance in cirrus cloud.

The invention discloses a method and system for detecting an abnormal battery in a lithium battery pack, and belongs to the technical field of lithium battery pack life prediction and estimation, and the method comprises the following steps: S1, detecting the terminal voltage, the temperature and a charge state of each lithium battery in the lithium battery pack at the current moment, wherein the terminal voltage and temperature of each lithium battery in the lithium battery pack form an abnormal characterization characteristic of the lithium battery pack, and the charge state of the lithium battery and the terminal voltage or temperature form an attenuation characteristic of the lithium battery; s2, inputting the obtained abnormal characterization characteristics of the lithium battery pack into a pre-trained abnormal battery judgment model, and identifying the positions of all abnormal batteries in the lithium battery pack; and s3, respectively inputting the attenuation characteristics of each abnormal battery into a pre-trained attenuation rate estimation model to obtain the attenuation rate of each abnormal battery. According to the invention, fine detection of abnormal batteries in the lithium battery pack is realized, more careful and in-place monitoring and management can be provided for the lithium battery pack, and faults in the lithium battery pack are effectively prevented.

The invention relates to the field of underwater operating robots, and provides an underwater autonomous operating robot which is suitable for acoustic and optical detection of various underwater operating surfaces, and an operating method of the underwater autonomous operating robot. The underwater autonomous operating robot comprises an energy power module, a mechanical structure design module,an appearance design module, a master control module, a power propelling module and a functional module, wherein the master control module comprises a strong-current electronic control cabinet and a weak-current electronic control cabin; the power propelling module comprises at least two side thrusters, at least two vertical thrusters and at least one longitudinal main thruster; and the functionalmodule comprises a doppler velocity sonar, an imaging sonar, an optical camera integrated with an LED lamp, an optical communication MODEM, a depth and height meter, a front-end cloud deck and a rear-end cloud deck. The underwater autonomous operating robot provided by the embodiment of the invention is wider in detecting range, is more flexible in detecting way, and can realize autonomous operation.

The invention relates to a meteorological detection method and system of a three-dimensional wind field. The meteorological detection method comprises the steps that each phased array weather radar detects an instruction according to a receiving mode, and scans an equilateral-triangle-shaped detection area at the same time; the intensity data and the velocity data which are obtained through scanning are sent to a control processing center; the intensity data is fused to obtain a reflectivity factor, and meanwhile, the velocity data is subjected to vector synthesis to obtain a velocity vector field; according to the reflectivity factor and the velocity vector field, the three-dimensional wind field is determined; the position where microburst occurs is detected in the three-dimensional windfield. The invention further provides the system. The system comprises the three phased array weather radars and the control processing center. The equilateral-triangle-shaped detection area is builtthrough the meteorological detection method, and a weather radar detection area is synergistically detected to obtain the data, so that it is achieved that whole-airspace meteorology targets in an observation space range are accurately detected, and the more precise three-dimensional wind field is generated to greatly improve an existing meteorological observation level.

The invention discloses a ground-in-hole combined detecting system which comprises an electromagnetic instrument, a transmitting device, a rod-shaped receiving device, a transmitting-receiving fixingframe, a wall abutting type rotation preventer and a pushing rod. The electromagnetic instrument supports sequential intelligent starting and stoppage of single or a plurality of transmitting devicesand a plurality of receiving channels. A transmitting coil in the transmitting device is arranged on an annular frame. The upper end and the lower end of the rod-shaped receiving device are respectively provided with a pushing rod joint and a rotation preventer joint. In ground detection, the rod-shaped receiving device is arranged in the sleeve of a transmitting-receiving fixing frame. In in-holedetection, the rod-shaped receiving device is connected with the wall abutting type rotation preventer and performs in-hole movement by means of the pushing rod. An application method based on the detecting system of the invention mainly comprises ground and in-hole detection. According to a ground field source excitation characteristic, the application method can be divided into a fixed-source excitation mode, a movable-source excitation mode and a multi-source successive excitation mode, and single-hole or multiple-hole receiving. The ground-in-hole combined detecting system and the application method have advantages of reducing one-time field interference and humanistic electromagnetic interference, realizing high signal-to-noise ratio, improving detecting precision and realizing three-dimensional space detection to periphery of a drilling hole.

The invention discloses a Raman laser radar system for surface layer non-blind area atmospheric temperature detection. The Raman laser radar system comprises a laser emission subsystem, a lateral telescope receiving and light splitting subsystem and a data acquisition and inversion subsystem. The laser emission subsystem can emit laser with a specific wavelength, and the laser is vertically emitted to the atmosphere; the lateral telescope group receiving and light splitting subsystem is used for receiving, separating, extracting, detecting and extracting pure rotational Raman scattering echo signals relative to the lateral scattering high and low quantum number channel of the laser emission spectrum; and the data acquisition and inversion subsystem is used for acquiring lateral pure rotation Raman scattering echo signals with high and low quantum channels relative to the laser emission spectrum and performing data inversion of the atmospheric temperature, and the data acquisition and inversion subsystem is connected with the lateral telescope receiving and splitting subsystem. The invention further discloses a surface layer non-blind area temperature detection Raman laser radar method.

The invention relates to the field of track detection, and discloses a ballastless track measuring method and device. The method comprises the following steps: mounting a rail inspection trolley on ato-be-measured steel rail after lofting construction of a ballastless slab track, and mounting a total station at a position away from the central axis of the steel rail behind the rail inspection trolley; setting parameters of the total station according to the parameter setting manual of the total station and the currently measured environment; controlling the track inspection trolley to sequentially move to the positions of the CPIII control point pairs marked on the ballastless track, and collecting track gauge data; controlling the total station to acquire prism coordinate data when the rail inspection trolley moves to the CPIII control point pair position; inputting the track gauge data and the prism coordinate data into preset processing software to obtain a track error; judging whether the track error exceeds a preset error threshold value or not; and if so, adjusting the screw rod to correct the rail error of the steel rail until the error reaches the standard. Measurement ofthe ballastless track is more complete, and ballastless track measurement accidents are efficiently reduced.

The invention discloses a device for monitoring mountain fire in real time based on power grid wide area of a multispectral thermal energy monitoring radar, comprising a radar antenna device and a terminal industrial control computer in communication connection with the radar antenna device. The radar antenna device comprises a radar antenna, a dual-spectrum camera, a pitching box, a U-shaped support, a base and a wireless transmission module. The radar antenna is fixed to one end of the pitching box through a flange, the other end of the pitching box is hung in the air, the dual-spectrum camera is fixed to one side of the radar antenna through a support, an upper end of the U-shaped support is rotatably connected with the middle part of the pitching box through a pitching gear bearing arranged on two side walls of the pitching box, a lower end of the U-shaped support is rotatably connected with the top of the base through a crossed roller slew gear bearing arranged at the top of the base, and the dual-spectrum camera is in communication connection with a camera IP box in the pitching box through the wireless transmission module. The device for monitoring mountain fire in real timebased on power grid wide area of a multispectral thermal energy monitoring radar has the advantages of wide measurement coverage, accurate fire reconnaissance position, high precision and the like, can effectively save investment of manpower and material resources, and reduces property loss of line resources.

The invention relates to a construction method for an ionospheric three-dimensional probe satellite-bone SAR imaging processing platform, comprising the twelve steps of: step 1: initiating parameters and reading echo signal; step 2: carrying out orientation transformation toward Fourier; step 3: multiplying by Chirp Scaling (CS) factors; step 4: carrying out distance transformation toward Fourier; step 5: multiplying by distance compensation factors; step 6: carrying out distance inverse transformation toward Fourier; step 7: multiplying by orientation compensating factors; step 8: carrying orientation inverse transformation toward Fourier; step 9: multiplying by orientation Deramp factors; step 10: carrying out orientation transformation toward Fourier; step 11: carrying transverse toward Fourier; and step 12, outputting three-dimensional compression signals. The invention has the advantages of compact structure and fast processing speed, can generate three-dimensional distribution images with high resolution, realizes three-dimensional fine observation of an ionospheric irregular body on a top layer, lays solid technical foundation for developing new-generation ionospheric spaceenvironment detection load systems, and has wide practical value and application prospect.

The invention discloses an array antenna source for advanced transient electromagnetic tunnel forecast. The array antenna source comprises multiple emission units, wherein the back of each emission unit is an external power source, the emission units respectively comprise an emission antenna, a spiral wire and a foundation, the spiral wire is wound at periphery of the emission antenna, an isolation layer is arranged between the spiral wire and the emission antenna to prevent current contact, the mutual inductance elimination effect is further realized, one side of a recess portion of a foundation center is an access port of the external power source, the other side of the access portion is provided with a needle array used for plugging the emission antennas, and periphery of the foundation has corresponding projections and recesses which are used for splicing the multiple emission units into one body. According to the array antenna source, emission field source intensity can be improved through changing source parameters and emission current intensity, exploration depth is improved, emission source pulse width is changed, high frequency harmonic wave components are improved, exploration precision is improved, high-resolution long distance exploration can be realized, and precise detection on a water guide channel in front of a tunnel face can be realized.

The invention discloses a detection module and a laser ranging system. The detection module comprises a plurality of first detection assemblies located in a first area and a plurality of second detection assemblies located in a second area. The distance between every two adjacent first detection assemblies is greater than the distance between every two adjacent second detection assemblies, so that the detection resolution of the second area can be ensured to be relatively high. Correspondingly, the detection area of each second detection assembly in the second area covers the area with the high probability of occurrence of the detection object, so that fine detection of the detection object can be realized. The detection area of each first detection assembly in the first area covers the area with low probability of occurrence of the detection object, so that the detection module can be ensured to have a large detection range.

The invention discloses an automatic deviation rectifying method and device for machining a hollow shaft, and relates to the technical field of lathe machining. The device comprise a lathe body, wherein one side of the lathe body is fixedly connected with a fixing plate, the upper surface and the lower surface of the surface of the fixing plate are respectively fixedly connected with a pre-deviation rectifying device and a fine deviation rectifying device, and one end of a rotating rod is fixedly connected with a detector. The hollow shaft needing machining is measured for the first time through the pre-deviation rectifying device, so that whether the hollow shaft has a position deviation phenomenon or not is determined, the pre-deviation rectifying device prepares for the fine deviation rectifying device, if the position deviation phenomenon exits, the precise deviation rectifying device does not need to perform detection, the detection time of the precise deviation rectifying deviceis reduced, the whole-plane detection of the precise deviation rectifying device greatly improves the accuracy of deviation rectifying of the hollow shaft, the completeness of deviation rectifying ofthe hollow shaft can be guaranteed, and the situation that a hollow shaft has errors, finally, the hollow shaft is scrapped, and the material is wasted is avoided.

The invention relates to a target detection method and device, computer equipment and a storage medium. The method comprises the following steps: performing target detection on a detection image to obtain a global target; determining a region of interest in the detection image according to a preset region of interest determination rule; performing target detection on the local image correspondingto the region of interest to obtain a local target; and performing fusion processing on the global target and the local target to obtain a final target of the detection image. Through carrying out target detection on the local image corresponding to the region of interest again, refined detection on the target in the region of interest is realized, and the detection success rate of the small target in the region of interest is improved. Furthermore, the global target and the finer local target are fused, so that the finally obtained final target is richer and more accurate than the global target, and the target detection precision is effectively improved.

The invention discloses a wide-area real-time mountain fire monitoring device for a power grid based on a multi-spectral thermal energy monitoring radar, which includes a radar antenna device and a terminal industrial computer connected in communication with the radar antenna device. The radar antenna device includes a radar antenna, a dual-spectrum camera, a pitching Box, U-shaped support, base and wireless transmission module, the radar antenna is fixed to one end of the pitch box through the flange, the other end of the pitch box is suspended in the air, the dual-spectrum camera is fixed to the side of the radar antenna through the bracket, and the upper end of the U-shaped support The pitch gear bearings installed on the two side walls of the pitch box are rotationally connected to the middle of the pitch box, and the lower end of the U-shaped support is rotationally connected to the top of the base through the cross roller slewing gear bearings installed on the top of the base. The transmission module communicates with the camera IP box inside the pitch box. The invention has the advantages of wide measurement coverage, accurate fire detection position, high precision, etc., can effectively save manpower and material resources, and reduce line resource and property losses.

The invention discloses a supervisory drive circuit, which comprises: a drive circuit, a sampling circuit and a supervisory circuit; the drive circuit is used to convert alternating current into direct current, and automatically adjusts the voltage according to the length of the cable; the sampling circuit is used to obtain load and send the collected data to the supervisory circuit; the supervisory circuit is respectively connected to the driving circuit and the sampling circuit to judge the state of the load according to the signal collected by the sampling circuit. The supervisory drive circuit proposed by the invention can automatically adapt to signal machines with different distances, and can be installed and used immediately after construction.

The invention discloses a fully polarized laser radar system for detecting particle morphology, comprising four parts: a polarized light generating system, a receiving system, a polarization analysis system and a data acquisition processor; the invention also discloses a system for detecting particle morphology The detection method of the fully polarized lidar system is characterized in that the method is specifically based on the steps of detecting the atmospheric backscattering Miller matrix by using the fully polarized lidar system, and then detecting the shape of the atmospheric particles by the atmospheric backscattering matrix. The fully polarized laser radar system for detecting particle shape of the present invention uses multi-directional linearly polarized laser and circularly polarized laser to detect aerosol particles, which can realize fine discrimination and detection of the shape of aerosol particles in the atmosphere; Fine measurements of cloud particles are used to analyze the ice-water phase state of cloud particles and particle orientation in cirrus clouds.

The invention relates to a pressure detection device for a track inspection robot. The device comprises a first supporting arm, a second supporting arm and a first connecting rod, a detection wheel is installed at one end of the first supporting arm, an elastic compression assembly is arranged at the other end of the first supporting arm, the first supporting arm is rotationally connected with the elastic compression assembly, a pressure sensor is arranged in the elastic compression assembly, and the middle of the first supporting arm is rotationally connected with one end of the first connecting rod; the detection wheel can rotate and walk on the surface or the rail web of a steel rail on one side; one end of the second supporting arm is perpendicularly and fixedly connected with the other end of the connecting rod, the other end of the second supporting arm is fixedly connected with the track inspection robot, and the middle of the second supporting arm is fixedly connected with the elastic compression assembly. The pressure detection device provided by the invention can accurately detect the wheel pressure change caused by the local deformation of the steel rail due to rail defect damage, material degradation and corrosion, thereby realizing the fine detection of the local deformation of the steel rail.

A bearing fault detection method includes six steps of collecting signals, obtaining the fault character frequency, conducting analysis, conducting filtering, extracting thresholds and distinguishing faults. The method has the advantages that the characteristic result of an envelope spectrum is extracted by comprehensively using a power spectrum and wavelet conversion, whether a line spectrum in the bearing detection process is an interference spectrum or a fault line spectrum is judged, and the bearing detection efficiency and accuracy are effectively improved. The method is simple, small in calculation amount and easy to achieve, the detection result can be displayed in a computer in real time, and the automated and intelligent bearing detection is completely achieved.

The invention discloses a real-time target detection method based on an online learning strategy. The method comprises the following steps: firstly, acquiring an input target window and a scanning window from a sensor image, dividing the scanning window into a positive sample or a negative sample according to an overlapping degree parameter of the two windows, calculating a posterior probability, and establishing a random forest detector; traversing all scanning windows in a new frame of image, establishing a training sample set, and calculating a random forest feature vector and a posterior probability of each sample; executing target tracking, automatically obtaining latest target window information, dividing a training sample set into a positive sample set and a negative sample set according to overlapping degree parameters of a scanning window and a new target window, and training a random forest detector by using the training sample set; and finally, obtaining a trained detector through continuous iterative training, inputting a frame of image into the detector, and outputting a target detection result. According to the invention, fine detection of a small target can be realized, the calculation amount is small, and real-time processing can be realized on an embedded platform.

The invention provides a capacitor electric leakage detection method and device, equipment and a medium, and relates to the technical field of storage. The method comprises the steps that first change correlation information of capacitance retention time of a to-be-detected storage capacitor and word line voltage of a to-be-detected word line is obtained, the word line voltage of the to-be-detected word line changes in a preset voltage range including word line closing voltage, and when the first change correlation information meets a first anomaly judgment condition, the to-be-detected storage capacitor is detected according to the first anomaly judgment condition; determining that the electric leakage behavior of the to-be-detected storage capacitor is related to the to-be-detected word line; or second change correlation information of capacitance retention time of the to-be-detected storage capacitor and word line voltage of an adjacent word line is obtained, the word line voltage of the adjacent word line changes in a preset voltage range, and under the condition that the second change correlation information meets a second anomaly judgment condition, the to-be-detected storage capacitor is detected. And determining that the electric leakage behavior of the to-be-detected storage capacitor is related to the adjacent word line. According to the embodiment of the invention, fine detection of the electric leakage behavior of the capacitor can be realized.

The invention discloses a nondestructive measuring method for the intension of a live standing tree. The method includes the steps that: step one, a live standing tree to be measured is selected, and the spread velocity V of a mechanical wave is measured at an area to be measured; step two, a consecutive and integrated tree core with diameter of 3 to 12 mm is taken radially in the area to be measured; step three, the mass of the tree core is weighted and the volume of the tree core is measured on the spot, thereby obtaining the density Rho of the tree core; step four, an elastic modulus Ed is calculated according to the formula that E is equal to V<2>Rho; wherein, the Ed is the elastic modulus of the live standing tree. The invention can perform examination without needing to cut down the live standing tree, not only the detection efficiency is high, but also the detection labor intensity is small.

The invention proposes a fault detection device and method for an electric vehicle and its high-voltage interlock system, wherein the high-voltage interlock system includes a high-voltage connector, the public end of the high-voltage connector has a first contact and a second contact, and the high-voltage connector has a first contact and a second contact. The female end of the plug-in has a third contact and a fourth contact, the first contact is matched with the third contact, the second contact is matched with the fourth contact, and the device includes: a voltage dividing unit, a first signal acquisition Terminal and the second signal acquisition terminal and the control unit, the control unit collects the voltage of the first signal acquisition terminal and the second signal acquisition terminal respectively to generate the first voltage value and the second voltage value, and according to the first voltage value and the second voltage value Judging the connection state of the high-voltage connector can effectively detect the abnormal connection fault of the high-voltage connector, provide a strong guarantee for the subsequent formulation of refined fault handling measures, and improve the driving experience of the driver.