30results about How to "Realize no dead angle detection" patented technology

The invention discloses a foldable bridge detecting arm and a detecting vehicle. First slide rails are fixed on the upper surface of a support arm; first slide bars are projected on the two sides of the first slide rails, and are slidingly connected with bridge detecting devices; a flexible slide rail is fixed on the upper surface of the hinged place of the slide rails; the adjacent first slide rails are connected through the flexible slide rail; second slide bars matched and fixedly connected with the first slide bars are formed on the flexible slide rail; a rotating mechanism is connected tothe hinged place of the support arm; and n is not smaller than 3. The foldable bridge detecting arm is simple in structure and convenient to use; and operation rails of the bridge detecting device can be changed according to bridge bottom structures to adapt to the corresponding bridge bottom structures, so that no-dead-angle detection of the bridge bottoms is realized, the detecting effect is guaranteed, the crack detecting rate of bridges is increased, and the bridges are timely cured to prolong the life.

The present invention provides an automatic driving method and system. Firstly, the corresponding relationship between the vehicle body parameters, the vehicle speed and the optimal steering angle of the vehicle is obtained and the corresponding relationship is stored; when the optimal maneuvering strategy is lane switching, Adjust the driving state of the motor vehicle to an ideal state during overtaking and steering maneuvers; then obtain the speed of the motor vehicle and the wheelbase of the front and rear wheels of the motor vehicle; compare the speed of the motor vehicle with the corresponding relationship to obtain the best steering angle of the motor vehicle; The optimal steering angle of the motor vehicle and the wheelbase of the front and rear wheels of the motor vehicle are used to obtain the turning radius of the motor vehicle; finally, the trajectory of the lane switching path can be planned according to the optimal steering angle of the motor vehicle and the turning radius of the motor vehicle. Therefore, the present invention provides an automatic driving method and system capable of accurately planning the lane switching path trajectory of a motor vehicle in an automatic driving state according to an optimal maneuvering strategy, and provides the most accurate reference for the automatic driving of a motor vehicle.

The invention discloses a 360° detection sensor based on an area array CCD / CMOS and a detection method, including an area array CCD / CMOS sensor, a conical mirror, a light-shielding tube, a light source, a collimating lens, an optical filter, a cylindrical window, Circular aperture diaphragm, after the light source passes through the collimating lens, after being emitted through the conical mirror, it is emitted through the cylindrical window, and after meeting the reflector, it is reflected by the reflector through the conical mirror, and then emitted through the conical mirror, and the light passing through the circular aperture Diaphragm, filter reflected to the area array CCD / CMOS sensor. Correspondingly, a detection method based on the above-mentioned area array CCD / CMOS 360° detection sensor is also provided. The present invention realizes 360° no dead angle detection, realizes full coverage detection of one machine, or area detection, and can be used for perimeter collision avoidance , area security, contour detection, contour detection, angle tilt and other applications. In addition, the method of image difference is adopted, which has strong anti-interference ability to the environment.

The invention relates to an indoor four-rotor unmanned aerial vehicle 360-degree three-dimensional obstacle avoidance system and belongs to the control science and control engineering field. When a four-rotor unmanned aerial vehicle cruises indoors to perform tasks such as rescue and relief work, problems can be brought to the flight of the four-rotor unmanned aerial vehicle caused by relatively complex indoor environment, weak GPS signals and difficulty in deploying peripherals, and in order to solve the above problems, the four-rotor unmanned aerial vehicle 360-degree three-dimensional obstacle detection and obstacle avoidance decision making device is designed. An STM32f103 is adopted as a core processor, and the number and the positions of ultrasonic sensors are reasonably configured, so that a model for acquiring surrounding environment information is constructed, and therefore, three-dimensional obstacle detection can be realized. When the four-rotor unmanned aerial vehicle performs a task, the obstacle avoidance decision making system performs Kalman filtering processing on acquired obstacle distance values and thereafter, performs data fusion based on directions, and performs obstacle avoidance decision making based on fused data through a fuzzy logic algorithm, and sends an obstacle avoidance decision to a flight controller through a serial port; and the flight controller controls the flight attitude of the unmanned aerial vehicle to complete an obstacle avoidance task.

The invention discloses a foldable bridge detection arm and a detection vehicle. A first slide rail is fixed on the upper surface of the support arm; first slide bars are formed on both sides of the first slide rail; A bridge detection device is connected; a flexible slide rail is fixed on the upper surface of the slide rail hinge; the adjacent first slide rails are connected to each other through flexible slide rails; the flexible slide rail is formed with a second A slide bar; a rotating mechanism is connected to the hinge of the support arm; n≥3. The invention is simple in structure and easy to use, and can change the running track of the bridge detection device according to the structure of the bridge bottom to adapt to the corresponding bridge bottom structure, realizes no dead angle detection of the bridge bottom, ensures the detection effect, and increases the detection of bridge cracks rate, which is conducive to timely maintenance of the bridge and prolonging the life of the bridge.

The invention discloses a small vehicle for field crop management with an accurate spraying function, and relates to the technical field of accurate agriculture, the small vehicle for field crop management with accurate spraying function comprises a vehicle body, a walking mechanism, a data acquisition module and a folding mechanism, a rotating mechanism, a spraying mechanism, wherein the walkingmechanism is used for moving the vehicle body and is arranged at the bottom of the vehicle body, the data acquisition module is used for acquiring field information, the folding mechanism is used fordriving the data acquisition module to be unfolded and stored, the rotating mechanism is used for driving the folding mechanism to rotate and a spraying mechanism is used for spraying operation. By means of a trolley, the mobile collection, real-time judgment and analysis, and real-time follow-up spraying of field crop information are achieved, the trolley can penetrate into a field crop plantingarea and is close to occurrence point of crop diseases, pests and weeds, the pesticide is accurately applied, the problem that the traditional pesticide is sprayed in a large area is solved, the collection efficiency and the accuracy are improved, the field crop and position information can be transmitted to a remote server in real time by means of a WiFi module or a 4G communication module so asto realize remote real-time collection.