14 results about "Radar navigation" patented technology

The invention relates to a radar, inertia and vision fusion navigation method of an inertia-guided attention mechanism, which comprises the following steps of: acquiring and processing vision / inertia / laser radar navigation data, and performing time / space characteristic decomposition on double-frame data of an image and a radar by utilizing a space-time attention separation mechanism so as to extract and obtain inertia-guided motion information characteristics; the method comprises the following steps: generating a key weight through a hidden state of a long short-term memory network by inertial features through an inertial guidance attention strategy network, carrying out interaction under a multi-modal attention framework, and generating a binary decision value through a Gumbel-Sigmoid method; and performing selective masking on visual and laser radar features according to a decision result, fusing the visual and laser radar features with inertial features, inputting the fused features into an LSTM pose estimation network, and outputting a high-precision six-degree-of-freedom pose. According to the method, visual and radar information is selectively extracted, so that robust, energy-saving and interpretable modal selection and accurate pose estimation are realized.

The invention relates to the technical field of unmanned forklifts, in particular to an unmanned forklift hydrogen changing device and system.The unmanned forklift hydrogen changing device comprises an unmanned forklift body, a forklift lifting frame is fixedly connected to one side of the unmanned forklift body, a telescopic pallet fork is slidably connected to one side of the forklift lifting frame, and a forklift control host is fixedly connected to the top of the unmanned forklift body; a radar navigation module is fixedly connected to the top of the forklift control host, a cantilever lifting appliance is slidably connected to the outer wall of the forklift lifting frame, a trolley lifting appliance is fixedly connected to the bottom of the cantilever lifting appliance, and a hydrogen storage box is fixedly connected to the bottom of the trolley lifting appliance; the unmanned forklift body drives the hydrogen storage tank to move to the position beside the unmanned forklift needing hydrogen supplement, the hydrogen exchange control host controls the air pressure detection assembly to conduct air pressure detection on the hydrogen cylinder, and after the air pressure detection of the hydrogen cylinder is normal, the hydrogen exchange control host can supplement new hydrogen for the hydrogen cylinder through the hydrogen supplement assembly; in this way, workers do not need to manually supplement hydrogen for the unmanned forklift.

The application discloses a kind of based on radar navigation's screw drive V-shaped spring clothes taking robot, comprising: mobile trolley chassis, integrated with radar, ultrasonic sensor, camera, drive wheel, drive motor and rotary motor, for realizing environmental perception, autonomous navigation and chassis movement;Column type clothes taking device, including column and the clothes taking device and two-dimensional code recognition camera connected at its top, clothes taking device includes screw drive mechanism and V-shaped spring clothes taking component;With two-dimensional code label's buckle clothes hanger;And control module, respectively with the radar, ultrasonic sensor, camera, drive motor, rotary motor, two-dimensional code recognition camera and the motor of screw drive mechanism electrically connected, for whole machine instruction transmission and action coordination control.The application can realize no identification autonomous navigation, accurate positioning, adapt to a variety of home environment and clothes hanger specification.

The invention relates to the technical field of nuclear fusion, and discloses a mobile fusion reactor endoscopic observation system and a use method thereof. Comprising a cooling system, a transport vehicle, a laser radar, a vacuumizing device, a butt joint pipeline, a cable management system, a telescopic sliding table, a supporting electric cylinder, an endoscopic observation system, an endoscopic system moving track and a gate valve. The using method comprises the five stages of transportation and positioning, butt joint and sealing preparation, vacuum treatment and verification, observation task execution and recovery and evacuation, laser radar navigation and positioning are conducted firstly, then mechanical sealing and vacuum treatment are conducted, the endoscopic observation system enters a fusion reactor vacuum chamber to complete target area observation, and orderly recovery and evacuation are conducted after the task is finished. Modular design is adopted, full-process automatic operation is achieved, equipment is prevented from being exposed to an extreme environment for a long time, the detection efficiency and reliability are improved, and the working cost is reduced.

The invention relates to the technical field of manned rockets, in particular to a motor Weishi rocket engine, namely a true instant PD-6S manned rocket millimeter wave radar navigation system, a millimeter wave radar used in the system is high in penetrability and can penetrate through bad weather conditions such as cloud layers, fog and night darkness, all-weather navigation is achieved, meanwhile, the wavelength of the millimeter wave radar is short, and the millimeter wave radar is suitable for being used by people. Compared with the prior art, the millimeter-wave radar navigation system has the advantages that the millimeter-wave radar has high resolution and can accurately detect and position a target, in addition, the millimeter-wave radar does not depend on optical signals, is not influenced by illumination conditions and has high anti-interference capability, so that the safety and the reliability of the navigation system are improved, and in addition, circuits and devices of the millimeter-wave radar are simple and easy to implement. Therefore, the millimeter-wave radar navigation system has low failure rate and high reliability, so that the millimeter-wave radar navigation system can realize accurate control and navigation of the rocket and monitor the state of the rocket in real time, thereby improving the use effect of the radar navigation system.

Embodiments provide a landing and approach navigation system. The navigation system can use a radar system onboard an aircraft to transmit radio energy. A rotating reflector at a landing area can reflect the radio energy back to the radar system with an amplitude-modulation that is due to the rotation. With synchronized timing between the reflector and the radar system, and known rotation characteristics of the reflector, the radar system can use the reflected radio energy to calculate the bearing of the aircraft relative to the reflector and landing area.

This invention discloses a high-voltage DC power supply system and control method for LED fish-attracting lights on fishing boats. The system employs a PLL (phase-locked loop) to achieve precise phase tracking of the power grid within a wide frequency range of 40Hz to 55Hz. Through dual closed-loop control of the voltage outer loop and current inner loop combined with SVPWM modulation, it stably outputs a 700V to 800V high-voltage DC bus under a wide voltage fluctuation range of 380V to 450V from the ship's generator. The q-axis current command is set to zero to achieve unity power factor operation, effectively reducing harmonics and avoiding interference with the ship's radar, navigation, and communication equipment. The subsequent DC / DC unit uses isolated or non-isolated step-down circuits to convert the high-voltage bus voltage to the operating voltage required by the LED fish-attracting lights. This invention features high voltage utilization, high system efficiency, and adaptability to the harsh electrical environment of fishing boats, significantly reducing line losses and fuel consumption.

The application relates to a radar, inertial and visual fusion navigation method of an inertial attention mechanism, comprising collecting and processing visual / inertial / laser radar navigation data, decomposing time / space features of double-frame data of images and radars by using a separated space-time attention mechanism, and then extracting inertial guided motion information features; by means of an inertial guided attention strategy network, key weights are generated by inertial features through a long short-term memory network hidden state, interaction is carried out under a multi-modal attention framework, binary decision values are generated by a Gumbel-Sigmoid method; according to the decision result, selective masking is carried out on visual and laser radar features, and after fusion with inertial features, the features are input into an LSTM pose estimation network, and high-precision six-degree-of-freedom pose is output. By selectively extracting visual and radar information, the application realizes robust, energy-saving and interpretable modal selection and accurate pose estimation.

The invention provides a fusion map generation method and an intelligent car control method. The fused map generation method comprises the following steps: mapping original map data of a plurality of navigation modes into a plurality of logic sub-layers of a fused map, and generating standard map data in different logic sub-layers; when the navigation mode is the laser radar navigation mode, generating standard map data in the background sub-layer; and when the navigation mode is the linear navigation mode or the matrix two-dimensional code navigation mode, generating standard map data in the path sub-layer. Original map data from different sources are fused into unified standard map data in a plurality of logic sub-layers of a fused map through a mapping relation, isomerism is digested through the fused map, and the problem of complexity of an original system is solved. According to the method, the existing facts are respected, the data consistency and uniformity are realized, the universality and usability of the fused map are enhanced, and the adaptability of the fused map is improved.

The application provides a container ship multi-working-condition shaft power generation and energy storage hybrid power efficiency optimization system, which is applied to the field of ship energy management and comprises a working condition strategy module, a fluctuation suppression module and a power distribution module, the working condition strategy module is electrically connected with a ship radar navigation device and a ship identification system receiver, the fluctuation suppression module is electrically connected with a refrigerated container load detection component, and the power distribution module is electrically connected with a ship power grid load detector, a main engine rotating speed sensor and an energy storage state of charge sensor; the application cooperatively regulates the output power of the main engine shaft power generation device, the auxiliary power generation device and the composite energy storage device, and builds an efficient power calling mechanism for the ship power grid, so that under complex ship working condition information, the safety redundancy and reliability of power supply are improved, the electric energy utilization efficiency is improved, the fuel consumption is reduced, and the comprehensive goals of energy saving and emission reduction are achieved.

The application discloses a kind of semi-solid laser radar's reflection difference plane mark design and identification method, wherein identification method involves semi-solid laser radar and reflection difference plane mark, reflection difference plane mark includes matte background and reflection information;Identification method obtains dense point cloud in scanning field by solid-state laser radar, capture the identification information with strong reflectivity, then filter and voxelize to point cloud, finally through the plane mark neural network detection algorithm special for semi-solid laser radar extraction, identification obtains the information of plane mark;The application can solve the problem that single laser radar cannot identify plane mark information, compared with camera plane mark recognition, accurate three-dimensional information can be obtained, and it has the robustness of detection under dark and weak light.The application can provide plane semantic detection support for semi-solid laser radar SLAM, AGV navigation, underground autonomous exploration label identification and other tasks that must use laser radar or camera failure.

The invention provides a height measuring device with anti-interference capability and an anti-interference method thereof, and belongs to the technical field of radar navigation, and the device comprises a modulation parameter agility control module, a modulation source, a transmitter, a transceiving antenna, a frequency mixer and a signal processing and control module. Different modulation parameters are switched in each modulation period through the modulation parameter agility control module, and the transmitter is controlled to generate modulation parameter agility frequency modulation continuous wave signals. The altimeter is in a coherent receiving state and can correctly solve the height; and deception signals intercepted and forwarded by the external jammer lose coherence due to parameter mismatch, and are filtered or suppressed by the system. According to the invention, the action mechanism of deception interference is destroyed, the anti-interference capability and reliability of the radio altimeter in a complex electromagnetic environment are effectively improved, and meanwhile, the compatibility with the working frequency band of a traditional system is kept.

The application belongs to the technical field of marine navigation radar, and specifically discloses a marine radar navigation blind-filling method based on maximum value fusion and clutter suppression rules. According to the application, pixel-level registration is performed on the current radar image, and the initial fusion value of each pixel point is determined according to the gray value of each marine radar at each pixel point position; each pixel point is fused according to the initial fusion value; the true target and the clutter are distinguished and the clutter is suppressed by applying a multi-level clutter suppression rule to the initial fusion image, and the navigation of the marine radar is filled blind according to the true target. In the above manner, the maximum gray value is selected as the initial fusion value of the pixel point for fusion, ensuring that as long as the target is detected by the marine radar, the target can be displayed in the initial fusion image. The multi-level clutter suppression rule is used to distinguish the true target and the clutter, thereby effectively improving the accuracy of the blind-filling marine radar navigation and further improving the safety of ship navigation.

The application provides an AGV positioning and navigation method, which comprises the following steps: rotating a radar navigator to a position to start performing a detection operation, moving an AGV in a natural navigation mode, and adjusting the navigation mode according to detection data of a navigation device; if a navigation matching rate of a current position detected by the radar navigator when the radar navigator is located at the current position is lower than a trigger threshold, rotating the radar navigator transversely to a new detection position, and switching the AGV to move in an inertial navigation mode; otherwise, keeping the radar navigator at the current position, and keeping the AGV to move in the natural navigation mode; rotating the radar navigator transversely and detecting simultaneously to obtain a real-time navigation matching rate, stopping the radar navigator when the navigation matching rate is not lower than the trigger threshold, and switching the AGV to move in the natural navigation mode. The AGV positioning and navigation method provided by the application uses a radar navigator which can rotate 360 degrees around the AGV body, so that the navigation device can keep obtaining a higher navigation matching rate and the radar navigator can be prevented from being shielded.