16results about How to "Meet detection needs" patented technology

The invention discloses a radioactive gas detection device and a detection method.The radioactive gas detection device is applied to detection of radioactive gas containing target nuclides and comprises an adsorption assembly, a sampling assembly, a monitoring assembly, a desorption assembly, a detection assembly, a first control valve set and a controller, the sampling assembly, the adsorption assembly and the monitoring assembly are sequentially communicated; the adsorption assembly is further communicated with the detection assembly, and the controller is configured to control the first control valve group to enable the adsorption assembly and the sampling assembly as well as the adsorption assembly and the monitoring assembly to be in a disconnected state when the monitoring assembly monitors that the radioactive gas passing through the adsorption assembly contains target nuclide; the adsorption assembly and the detection assembly are in a communication state, and the detection assembly is controlled to execute detection operation on the target nuclide released from the adsorption assembly so as to obtain the content of the target nuclide. The radioactive gas detection device can improve the detection precision of the target nuclide in the radioactive gas.

The present invention provides a water body laser radar based on coded pulses and a coded pulse laser generation method. A coded pulse laser conversion device in a modulation mode or a physical mode converts a continuous laser or a pulse laser into a blue-green band coded pulse laser suitable for water body and target detection. When the modulation mode is adopted, the average emission power of the emitted laser is increased, and the coding-related gain is generated by encoding the laser pulses, the background noise is removed, and the system signal-to-noise ratio is improved, thereby realizing long-distance and weak-signal target detection of the pulse laser radar. At the same time, since the continuous laser device is mature, there are more selectable bands, the applicability is wider, and the detection requirements of different water body scenes can be met. When the physical mode is adopted, the laser pulses are encoded to generate two-way coded pulse lasers. Compared with a single-repetition pulse laser radar system, not only the system signal-to-noise ratio can be improved, but also the detection dimension and range can be increased, the detection waiting time can be reduced, and the detection efficiency can be improved.

Embodiments of the present application provide a kind of laser radar, electronic equipment and vehicle, laser radar includes: laser emission component, laser receiving component and two-dimensional scanner, laser emission component is used to emit at least two laser beams with included angle in the vertical field of view of laser emission component, two-dimensional scanner is used to reflect the laser beam emitted from laser emission component to target object, and is used to reflect the laser beam reflected from target object to laser receiving component, two-dimensional scanner satisfies relationship formula: 1 / 2 beta ≤ 2 alpha 3 / 2 beta, and 2 alpha ≠ beta, wherein, alpha is the single rotation angle of two-dimensional scanner in slow axis direction, beta is the included angle between adjacent two laser beams.Such setting, it can improve the scanning density of two-dimensional scanner in slow axis direction, to improve the vertical angle resolution in slow axis direction, so that small target at long distance can be detected.

The invention provides an electromagnetic vortex wave generation method, which comprises the following steps: S1, calculating a target electromagnetic vortex wave main lobe pointing angle and an emission mode number range according to a given amplitude weighted concentric circular ring array structure; s2, obtaining an excitation amplitude calculation formula according to an orthogonal decomposition algorithm, and calculating excitation amplitudes corresponding to different emission mode numbers obtained in the step S1 under a target electromagnetic vortex wave main lobe pointing angle based on the excitation amplitude calculation formula; and S3, performing simulation verification calculation to obtain a transmitting modal number l and a corresponding excitation amplitude Am, performing accounting on the ratio of main lobe pointing to peak side lobe of the electromagnetic vortex wave, and performing screening to obtain amplitude weighted concentric annular array electromagnetic vortex wave transmitting parameters with low side lobe and high pointing precision. According to the method, the electromagnetic vortex wave which generates the low side lobe and is pointed by the given beam is derived and calculated by using the orthogonal decomposition theory, and compared with a search-based heuristic algorithm, the method has higher universality and real-time performance, and can widely and efficiently adapt to different scene requirements.

The present invention discloses a method for dividing star clusters and a method for handing over slave satellites in collaboration with multiple star clusters, and relates to the field of space-based detection technology. The specific implementation of the method includes: for each slave star of any star cluster, calculating the first distance from the slave star to the central control center of each star cluster; comparing multiple first distances to determine the minimum value of the first distance; determining the star cluster to which the central control center corresponding to the minimum value of the first distance belongs as the target star cluster of the slave star. This implementation can compare the distances of each satellite in the star cluster relative to the center of each star cluster, determine the optimal star cluster to which the satellite belongs, thereby improving the satellite utilization rate during the execution of observation tasks, and rationally utilizing on-board resources, and the slave satellites between star clusters can be flexibly switched based on the distance relative to the center of each star cluster, so as to observe the observation target, so that the observation effect of the entire star cluster is optimal, and is suitable for various mission scenarios.

The utility model discloses a temperature measuring device for geothermal exploration, and belongs to the technical field of temperature measuring devices, the temperature measuring device comprises a base, the top of the base is fixedly connected with a rectangular frame, the middle of the rectangular frame is fixedly connected with a concentric-square-shaped partition plate, and a rectangular block is arranged in the rectangular frame and located above the concentric-square-shaped partition plate; an adjusting seat is fixedly installed on one side of the rectangular block, a first electric push rod is hinged to the side, away from the rectangular block, of the adjusting seat, an L-shaped support is fixedly installed at the telescopic end of the first electric push rod, a temperature measuring instrument is fixedly installed at the bottom of the L-shaped support, and a second electric push rod is installed at the bottom end of the L-shaped support; the telescopic end of the second electric push rod is installed at the bottom end of the L-shaped support, and a supporting mechanism is arranged at the bottom end of the second electric push rod. The position and height of the temperature measuring instrument can be conveniently adjusted, and the detection requirements of different terrains can be met.

This invention discloses a method, system, device, and medium for automatic extraction of black soil layer interfaces using ground-penetrating radar (GPR) based on an improved U-Net, belonging to the field of GPR data processing and intelligent interpretation technology. The method includes acquiring and preprocessing GPR B-scan image data, constructing a training dataset, building a layer extraction model based on an improved U-Net neural network model, constructing a hybrid loss function including at least two combinations of weighted binary cross-entropy loss, Dice loss, structural similarity loss, and smoothness loss, training the layer extraction model based on the training dataset and the hybrid loss function, and inputting the GPR B-scan image data to be detected into the trained layer extraction model to achieve automatic extraction of black soil layer interfaces using GPR. This invention effectively overcomes signal attenuation and noise interference in GPR images, achieving high-precision and continuous soil layer interface extraction.

This invention belongs to the field of sensor scheduling and discloses a cross-domain sensor resource scheduling method and system based on adaptive particle swarm optimization. The method includes initializing the particle swarm; updating the initialized particle swarm using a combination of swarm optimization and particle update algorithms; in the leader bee neighborhood search phase, updating the initialized particle swarm using the particle update algorithm to generate updated particles and calculating the target fitness corresponding to each updated particle; in the follower bee follow search phase, updating the particle swarm again using the roulette wheel algorithm based on the target fitness corresponding to each updated particle to obtain the update result; repeating the processes corresponding to the leader bee neighborhood search phase and the follower bee follow search phase until the maximum number of iterations is reached, and outputting the current update result as the optimal sensor scheduling scheme. This method improves detection accuracy and reduces radiation exposure risk and the number of sensor task switching operations.

The invention discloses an underwater sound source target detection, identification and positioning method and device based on a millimeter wave radar, and belongs to the technical field of underwater target detection, identification and positioning. The method comprises the following steps: acquiring a water surface echo signal by using a millimeter wave radar, and performing Fourier transform to obtain a distance-time spectrum; extracting a slow time phase sequence of each range gate in a radar beam coverage range, and obtaining a sound-induced water surface vibration signal after unwinding and filtering; performing correlation calculation on the vibration signal and a preset target feature library, or realizing target recognition through a deep learning model; a multi-radar cooperation or single-radar digital beam forming technology is adopted for target positioning, and large-range water area searching is achieved. According to the invention, the millimeter-wave radar is used for detecting micron-sized water surface vibration with high phase sensitivity, the defects of short distance, complex arrangement and the like of traditional acoustic and optical detection are overcome, and the system has large-range, real-time and non-contact underwater target detection and positioning capability.

The present invention relates to the field of occultation detection technology, and discloses a design method for the orbital inclination of an atmospheric occultation detection constellation, wherein the atmospheric occultation detection constellation is composed of 70 or more low-orbit satellites; three design indicators are set: indicator 1 is the atmospheric occultation event grid coverage rate used to characterize the global atmospheric occultation event coverage performance, indicator 2 is the standard deviation of the atmospheric occultation events in the middle and low latitudes used to characterize the uniformity of the distribution of atmospheric occultation events in the middle and low latitudes, and indicator 3 is the density distribution of atmospheric occultation events in the Chinese region used to characterize the density of atmospheric occultation events in the Chinese region; receiving simulation data: receiving the global atmospheric occultation event distribution latitude and longitude simulation data under different orbital inclinations; calculating the indicator results; calculating the comprehensive indicator d; comparing the comprehensive indicators d corresponding to all orbital inclinations, and taking the orbital inclination corresponding to the smallest comprehensive indicator d as the optimal inclination. The orbital inclination designed by the present invention optimizes the constellation detection efficiency.

This invention relates to a method for updating a digital elevation model (DEM) based on InSAR surface deformation. The method acquires surface deformation monitoring results of a target area using time-series InSAR technology. When the accuracy of the surface deformation monitoring results is verified by CORS stations, surface deformation zones are extracted from the monitoring results of the target area based on different geographical conditions by setting thresholds for surface deformation rate or surface deformation amount. Point cloud data of the surface deformation zones are acquired using airborne lidar. After data preprocessing, coordinate transformation, point cloud classification, and rasterization of the DEM, the DEM within the surface deformation zones is updated. Stable area DEM data is collected based on the principle of optimal current availability and mosaicked to form the updated DEM. Differential processing and leveling data analysis are performed on the two-phase DEM of the target area to verify the reliability of the surface deformation zones, achieving rapid updating of the DEM.

The present invention relates to an object position detection method and a laser radar. The method includes: generating an outgoing light and dividing the outgoing light into an outgoing wave signal and a local oscillator signal; emitting the outgoing wave signal outward; receiving an echo signal reflected by a detected target and projecting it to a detector; projecting the local oscillator signal to the detector at a preset angle so that the local oscillator signal and the echo signal interfere with each other before reaching the detector to form an interference signal and then project it to the detector; obtaining a first light intensity parameter of the echo signal; obtaining a second light intensity parameter of the local oscillator signal; obtaining a third light intensity parameter of the interference signal; determining the angle between the local oscillator signal and the echo signal according to the first light intensity parameter, the second light intensity parameter and the third light intensity parameter; and determining the azimuth information of the detected target according to the angle. The azimuth information of the detected target can be accurately determined by the above method.

This application provides a time-of-flight statistics device and a laser ranging device, relating to the field of laser ranging technology. The statistics device includes a statistics unit and a memory: the statistics unit is used to acquire S sets of first initial flight time data within S first integration periods, and to accumulate each first initial flight time data set by grouping every N adjacent first initial flight time data sets to obtain S sets of accumulated flight time data corresponding to the S sets of first initial flight time data, where S is a positive integer, S≥2, and N is a positive integer, N≥2; and to superimpose the S sets of accumulated flight time data to obtain a superimposed flight time data set, and to store at least one superimposed photon count value in the superimposed flight time data set in the memory as a single superimposed photon count value stored in a memory unit; this statistics device can increase the detection range of the laser ranging device.

The invention provides a multi-spectrum compatible camouflage and protection film and a preparation method thereof, and belongs to the technical field of camouflage films, and the method comprises the following steps: screening and determining a phase change functional layer material and a directional emission module material; coupling a directional transmitting module material, a phase change functional layer material and a mechanical protective layer material, constructing a Fabry-Perot resonant cavity type multilayer film structure, and calculating an initial thickness range of each layer of material in the directional transmitting module; carrying out parametric scanning by taking the initial thickness range of the optical spacing layer material as a variable, calculating the transmittance and the directional emissivity of the multi-layer film in a middle and far infrared band, and determining the optimal thickness of each layer of film at the same time; and according to the structure of the multi-layer film and the optimal thickness of the multi-layer film, sequentially depositing each layer of film material on the substrate by adopting a magnetron sputtering process to obtain the multi-spectrum compatible camouflage and protection film. The thin film in the scheme has dynamic infrared camouflage, efficient electromagnetic shielding, thermal management performance and mechanical protection performance.

The invention provides a towed body control system and towed body control method of a wave glider, a sonar obstacle avoidance module detects whether there is an obstacle in the moving direction of a towed body in real time, acquires obstacle information corresponding to the towed body when detecting the obstacle, and then generates an obstacle avoidance control instruction of the towed body based on the obstacle information; the electrical control module controls the two wings, the empennage and the four propellers to execute obstacle avoidance operation based on the obstacle avoidance control instruction; the pressure depth module acquires depth information of the towed body in real time; the auxiliary sensing module acquires navigation information of the towed body and environment information corresponding to the towed body in real time; the electrical control module controls the two wings, the empennage and the four propellers to adjust the depth of the towed body based on preset depth information, depth information, navigation information and environment information. According to the invention, obstacle avoidance control and depth adjustment can be carried out on the towed body of the wave glider by using the preset depth information and the obstacle information, the depth information, the navigation information and the environment information which are acquired in real time.

The invention discloses a detector control circuit, a laser radar and a detection method thereof. The detector control circuit comprises at least two stages of low-side drivers which are connected in sequence; the at least two stages of low-side drivers connected in sequence are connected with the power supply voltage of a plurality of gears and the detector, and are used for outputting the power supply voltage of one gear to the detector according to a control signal. By utilizing the scheme of the invention, the dynamic range of the receiving end can be expanded while a close-range blind area caused by stray light is optimized, and the measured reflectivity accuracy and the distance measurement accuracy are ensured.