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362 results about "Environmental sensing" patented technology

Environmental Sensing. Environmental sensing relies extensively on molecular spectroscopy for tracking air quality, water and wastewater quality, and detecting hazardous substances. Ozone Monitoring Spectroscopy with UVC LEDs can be used to quantify ozone levels and detect particulate matter in air.

Virtual coupling small-group train control system and method based on train-train communication

The invention discloses a virtual coupling small-group train control system and method based on train-train communication, and is a scheme which guarantees running safety and improves train running efficiency. In the scheme, in a small-group range, a main train continuously detects environment awareness and state data of the main train, environment awareness and state data of a front train are acquired by point-to-point direct communication, a control strategy is formed by comparison calculation according to a calculation result, and a rear train is adjusted to follow the front train within adynamic safe distance. By the strategy, the main train is controlled to follow the front train adaptively, and the trains in a small group can be assisted to cooperatively make correct active train control decision and operation. By the scheme, the running performance of the system can be greatly improved, requirements of flexible operation of urban rail transit can be met well, development spaceand potential are huge, and the virtual coupling small-group train control system and method based on train-train communication are future development tendency and the development direction of an urban rail transit traffic signal system.
Owner:SIGNAL & COMM RES INST OF CHINA ACAD OF RAILWAY SCI +3

Automobile traveling control system and automobile traveling control method

The invention discloses an automobile traveling control system and an automobile traveling control method and belongs to the technical field of automobiles. The automobile traveling control system comprises an acquiring unit, an environment sensing unit, a traveling parameter collecting unit, a planning and decision-making unit and a real-time control unit, the acquiring unit is used for acquiring a driving instruction, the environment sensing unit is used for sensing automobile traveling environment in real time and generating environment information, the environment information includes one or multiple of lane line position, target automobile information, current automobile pose and garage position information, the traveling parameter collecting unit is used for acquiring a current automobile traveling state and generating automobile traveling parameters, the automobile traveling parameters include one or multiple of current automobile speed, front wheel deflection angle and automobile traveling route, the planning and decision-making unit is used for generating a control instruction according to the environment information, the automobile traveling parameters and the driving instruction, and the real-time control unit is used for controlling automobile traveling according to the control instruction. The automobile traveling control system integrates functions of lane line maintaining, self-adpative cruising and automatic parking, so that functions of an intelligent automobile are further enriched.
Owner:CHERY AUTOMOBILE CO LTD

Model ship based autonomous navigation control simulation system and method of under-actuated unmanned ship

The invention provides a model ship based autonomous navigation control simulation system and method of an under-actuated unmanned ship. The whole system is arranged on a model ship, and the model ship is arranged in a simulated navigation channel; the system comprises an environment sensing sub system, a path programming sub system and a motion control sub system; the environment sensing sub system collects the navigation state of the model ship and simulates environment factor information; according to the navigation state of the model ship and the simulated environment factor information, the path programming sub system carries out navigation programming to obtain the tracking route, the set speed and the set course; and the motion control system combines a course tracking model, a path tracking model, the route deviation, the course deviation and the speed deviation to calculate the rudder angle and propeller rotating speed instruction needed in next navigation of the model ship and control a steering engine and a propeller. According to the invention, simulation experiments are carried out on the model ship, an instance is provided for operation and control experiments of large ships, important guarantee is provided for safe navigation of large ships in inland rivers, and the system reduces the difficult and cost of experiments of the large ships.
Owner:WUHAN UNIV OF TECH

Unmanned ship water surface target detection, identification and positioning method based on monocular camera and lidar information fusion

The invention belongs to the field of intelligent unmanned intelligent ships, and relates to an unmanned ship water surface target detection, identification and positioning method based on monocular camera and lidar information fusion. The detection, identification and positioning of a water surface target by an unmanned ship are influenced by distances and the fluctuation of the target, so that alidar and a monocular camera are integrated to accurately detect, identify and position the target within a sensing range. According to the method, acquired water surface target images are adopted totrain a neural network-based target detection and recognition model; the lidar employs a conditional removal filter and Euclidean clustering to obtain the position of the water surface target in a world coordinate system; and finally, a camera image information and lidar information fusion method is designed, and therefore, the method is highly robust to uncertain factors. With the method adopted, the unmanned ship is capable of accurately detecting, identifying and positioning the water surface target; and good environment perception can be realized for the target tracking, path planning andautonomous navigation of the unmanned ship. The method has a broad application prospect.
Owner:HARBIN ENG UNIV

Automatic driving system based on pure electric logistics vehicle and control method thereof

The invention provides an automatic driving system based on a pure electric logistics vehicle and a control method thereof. The system comprises an automatic driving control system, a human-computer interaction system, an automatic driving system gateway and an execution system. The method comprises the steps that step one, an environment perception system acquires the surrounding environment dataof the vehicle and performs fusion, perceives the surrounding obstacle information and passable area information and also acquires the high precision position information of the vehicle and the roadinformation and then generates a driving situation map according to the primary planning path result planned by the lane level navigation system; step two, an intelligent decision system performs secondary planning of the local driving route in real time according to the driving situation map generated by the environment perception system and decomposes the secondary planning result into the transverse control instruction and the longitudinal control instruction; and step three, the execution system receives the executes the transverse control instruction and the longitudinal control instruction from the intelligent decision system so as to complete full-automatic driving. Automatic driving can be realized and the intelligent level of the complete vehicle can be enhanced.
Owner:鹤山东风新能源科技有限公司

Network driving environment integrated perception model based on convolutional and hollow convolutional structure

A network driving environment integrated perception model based on a convolutional and hollow convolutional structure simultaneously realizes object detection and semantic segmentation. A video imageof a road environment is shot through a forward-looking camera system mounted on a vehicle. The residual network model is used to get the bottom feature map of the image. The converged network is designed, which includes two sub-modules: object detection and semantic segmentation. The two modules share the bottom feature map. Among them, the object detection module is responsible for predicting the confidence level of the object frame and the category, and the semantic segmentation module is responsible for predicting the pixel level of each category. The appropriate loss function is selectedfor each of the two modules, and the perceptual model tends to converge in both modules after alternate training. Finally, the joint loss function is used to train the two modules simultaneously to get the final perceptual model. The model can simultaneously complete object detection and semantic segmentation with small computation amount, and the perceptual model uses a large amount of data of object detection to assist the semantic segmentation module to learn the image distribution law.
Owner:SOUTHEAST UNIV

Front barrier detection system and method for unmanned driving automobile

The invention discloses a front barrier detection system and method for an unmanned driving automobile. The system comprises a millimeter wave radar, a vision camera and an information processing system, wherein the millimeter wave radar is connected with an industrial control computer through a CAN bus, the vision camera is connected with the industrial control computer through a 1394 interface,the information processing system comprises functions as follows, space coordinate calibration and time synchronization for the millimeter wave radar and the vision camera are carried out, millimeterwave radar data is acquired and resolved, a data processing algorithm based on Kalman filtering is utilized to analyze the barrier information, false targets are eliminated to determine effective targets, the information of the vision camera is acquired, an image processing algorithm is utilized to detect barriers, the barrier information identified by the millimeter wave radar is compared with the barrier information identified by the vision camera, and the barriers detected by the two types of sensors are taken as the reference to establish an accurate grid map. The method is advantaged in that accuracy is high, cost is relatively low, and practicality of an unmanned automobile environment sensing system can be effectively improved.
Owner:TIANJIN UNIV

Intelligent vehicle multi-laser radar fusion recognition method based on target features

The present invention provides an intelligent vehicle multi-laser radar fusion recognition method based on target features, relates to the field of intelligent vehicle environment perception. The method comprises the following steps: 1, performing pretreatment of collected data, extracting target geometric features and determining the type of the target; 2, calculating the geometry conformability degree of the target, and performing target matching according to the geometry conformability degree; 3, fusing the target geometric features through adoption of a method based on distance weight fusion; 4, tracking the target through adoption of a multi-feature target tracking method, and obtaining the relative movement features of the target; 5, obtaining the absolute movement features of the target through adoption of the vehicle movement features collected by a global positioning system; 6, correcting the type of the target according to the absolute movement features of the target and a target feature model; and 7, performing rasterization of the target features, and performing grid expression. The intelligent vehicle multi-laser radar fusion recognition method based on target features is configured to fuse the multi-laser radar through adoption of target features to improve the target recognition capability of a system and enhance the safety of a vehicle in the driving process.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Automatic emergency braking method based on multi-sensor fusion

InactiveCN110304054AGet the coordinate positionGet relative velocityAutomatic initiationsSignalling/lighting devicesRadarShortest distance
The invention provides an automatic emergency braking method based on multi-sensor fusion, and the method comprises the following steps of acquiring the coordinate position and the relative speed of an obstacle relative to a vehicle through real-time communication between an environment sensing sensor and a whole vehicle CAN network; screening targets acquired by the environment sensing sensor, and reserving obstacle targets in the running track of the vehicle; acquiring the coordinate position and the relative speed of the obstacle target in the running track of the vehicle relative to the vehicle, calculating the collision time of the vehicle and a front obstacle, comparing the collision time with a preset early warning time threshold value, and if the collision time is less than the early warning time threshold value, sending an alarm prompt through an alarm device; and determining obstacle approximation, and performing active braking in an emergency. According to the invention, obstacle targets are screened, so that the alarm is more accurate; and short-distance blind areas of a millimeter wave radar are compensated by fusing the millimeter wave radar and an ultrasonic radar, so that the continuity of obstacle distance detection is kept, and the braking is safer.
Owner:国唐汽车有限公司
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