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365 results about "Blind spot" patented technology

A blind spot, scotoma, is an obscuration of the visual field. A particular blind spot known as the physiological blind spot, "blind point", or punctum caecum in medical literature, is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of the retina where the optic nerve passes through the optic disc. Because there are no cells to detect light on the optic disc, the corresponding part of the field of vision is invisible. Some process in our brains interpolates the blind spot based on surrounding detail and information from the other eye, so we do not normally perceive the blind spot.

Bionic navigation method and navigation positioning system based on remote sensing sky polarization mode patterns

InactiveCN102538783AAvoid measurement time errorsGuaranteed accuracyNavigation instrumentsSkyGps navigation
The invention relates to a bionic navigation method and a navigation positioning system based on remote sensing sky polarization mode patterns. The method comprises the following steps: simultaneously measuring three images of light intensity of sky light by adopting a full-sky polarization remote sensing measurement method, and solving a polarization degree and a polarization azimuth angle which describe the polarization state of the sky light, thereby obtaining the remote sensing sky polarization mode patterns; analyzing each influence factor of the polarization degree and polarization azimuth angle in the remote sensing sky polarization mode patterns by adopting a full-sky polarization light measurement method, thereby obtaining the external conditions which are most suitable for polarization navigation; solving the sun azimuth angles at different time by combining celestial navigation theory knowledge, and amending the included angle between the sun meridian and a carrier by utilizing the sun azimuth angles, thereby obtaining a course angle taking geographical north and south as the reference directions; and processing the polarization navigation blind spot by adopting the combined navigation mode of a GPS (global positioning system) navigation mode and a polarization navigation mode. The bionic navigation method and navigation positioning system based on remote sensing sky polarization mode patterns can be widely applied to the measurement and research of navigation positioning under different conditions, and is a special new technology which enables the remote sensing observation image to serve the navigation positioning method and system by utilizing the bionic means.
Owner:PEKING UNIV

Unmanned aerial vehicle platform-based port real scene monitoring system and method

The invention discloses an unmanned aerial vehicle platform-based port real scene monitoring system and method. The system comprises a unmanned aerial vehicle platform sub-system and a ground command, monitoring and control sub-system; the unmanned aerial vehicle platform sub-system carries out omnibearing, zero-dead angle, near-distance and target trackable real-time monitoring on each region of a port; and the ground command, monitoring and control sub-system is used for controlling the operation of the unmanned aerial vehicle platform sub-system and receiving and analyzing information acquired by the unmanned aerial vehicle platform sub-system. According to the unmanned aerial vehicle platform-based port real scene monitoring system and method of the invention adopted, a four-rotor unmanned aerial vehicle platform is adopted as a carrier; and since the four-rotor unmanned aerial vehicle platform is simple in structure, can hover to avoid an obstacle and carry task load, the defects of traditional analog monitoring product equipment or network high-definition monitoring equipment due to factors such as visual blind spots, weather environment and maintenance and updating can be eliminated, and omnibearing, zero-dead angle, near-distance and target trackable real-time monitoring can be performed on each region of the port.
Owner:WUHAN UNIV OF TECH

Counterfeit invisible general commodity bar code or dot matrix and checking method by using mobile phone

The invention relates to a counterfeit invisible general commodity bar code or dot matrix and a checking method by using a mobile phone. A group of colored bar codes or dot matrixes are decomposed and arrayed on a micro-lens focus plane in a range of optical blind spots pre-calculated by the angle relative to a micro-lens optical axis and a watch distance by using the optical function of a micro-optical lenticulation counterfeit mark, so that the optical function of the micro-lens can ensure that invisible colored bar codes cannot be seen in a general watch distance. During checking, the mark is photographed in a micro distance by using the mobile phone with the function of photographing; and since the optical projection angle is changed, a lens of a camera can be used for recombining and displaying the decomposed colored bar codes on a screen, and a consumer can check the truth of commodities by contrasting colored reference bar codes of the commodities. Meanwhile, the consumer can transmit pictures of the colored bar codes back to an established counterfeit control center for checking; and a server of the counterfeit center can automatically search and check the counterfeit of products after receiving the bar codes of the mobile phone and querying and transmitting relevant data of the products to the mobile phone in real time.
Owner:劳国华

Automatic detection device and detection method of pin shrinkage of aviation electrical connector contact

The invention provides an automatic detection device and detection method of pin shrinkage of an aviation electrical connector contact, and belongs to the technical field of electrical connectors. Theinvention aims at solving the problems of numerous blind spots and inaccurate visual positioning of substations caused by manual inspection. The automatic detection device of the pin shrinkage of theaviation electrical connector contact provided by the invention comprises a detection platform and an upper computer; a motor is driven by the upper computer to drive a three-dimensional movement mechanism to move so as to drive a visual detection mechanism and a pin shrinkage detection mechanism to move to perform movement on an electrical connector to be tested installed on an electrical connector mounting mechanism; and the pin shrinkage detection mechanism sequentially contacts each contact pin on the electrical connector to be tested, applies a constant force to each contact pin, simultaneously obtains the displacement value of each contact pin and uploads the displacement value to the upper computer, and the upper computer generates a measurement table based on the displacement value, and judges whether the contact pin generates a pin shrinkage phenomenon according to the displacement value to completes the automatic detection process. The automatic detection device provided bythe invention is used for performing automatic detection on electrical connector contacts.
Owner:HARBIN INST OF TECH

Adaptive automobile headlamp and control method thereof

The invention discloses an adaptive automobile headlamp and a control method thereof. The adaptive automobile headlamp comprises a headlamp body, a headlamp horizontal steering motor, a headlamp vertical steering motor, a photosensitive sensor, an infrared distance sensor, a steering wheel rotation angle sensor, an automobile yaw angular velocity sensor, a vehicle body height sensor at a front wheel, a front wheel vertical velocity sensor and an ECU (Electronic Control Unit) control module. During work, the ECU control module controls automatic turn-on and turn-off of the headlamp according to the photosensitive sensor, controls automatic switching of high beam and low beam according to a signal of the infrared distance sensor and drives the headlamp horizontal steering motor and the headlamp vertical steering motor according to signals of the steering wheel rotation angle sensor, the automobile yaw angular velocity sensor, the vehicle body height sensor at the front wheel and the front wheel vertical velocity sensor, so that the headlamp irradiates in the special direction when an automobile turns around and climbs or gets down a slope. According to the invention, the blind spot vision of drivers under complex road conditions can be reduced and even eliminated.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

General countermeasure disturbance generation method

The invention discloses a general countermeasure disturbance generation method, which comprises the following steps of: (1) acquiring a network structure and a weight matrix of a target artificial neural network; (2) initializing an adversarial disturbance vector; (3) randomly sampling pictures from a training set, superposing the pictures with the current general adversarial disturbance, and inputting the superposed pictures into a neural network; (4) performing back propagation of gradients at a current picture label and a label with the maximum prediction probability other than the currentpicture label; (5) calculating an updating amount of the countermeasure disturbance by utilizing a predicted vector and the two groups of gradients; and (6) repeating the steps (3)-(5) until the current general countermeasure disturbance can reach a predetermined error rate on a test set. According to the general countermeasure disturbance generation method, the position of the decision-making boundary of the target artificial neural network can be accurately found out based on the network structure and the weight matrix of the target artificial neural network, and blind spots of a classifierin feature extraction are reflected to a certain extent.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Aerial photography image calibration method for unmanned aerial vehicle suitable for plane measurement

The invention discloses an aerial photography image calibration method for an unmanned aerial vehicle suitable for plane measurement. According to the method, firstly, an image calibration model is built, and whether any map is subjected to calibration or on-site aerial photography calibration is judged. If any map is judged to be subjected to calibration, the fine adjustment is carried out to complete calibration after the image calibration operation. If any any map is judged to be subjected to on-site aerial photography calibration, a photography image is collected and calibration parametersare recorded. After that, the automatically calibrating operation is carried out and preliminary calibration parameters are obtained. Meanwhile, whether primary calibration parameters meet the requirement or not is judged. If primary calibration parameters meet the requirement, the calibration is completed. If primary calibration parameters do not meet the requirement, the plane image correctionor the plane image fast calibration is carried out. After the plane image correction or the plane image fast calibration, the fine adjustment is carried out to complete calibration. The method is simpler, clearer and faster in imaging operation, so that the real-time unmanned aerial vehicle calibration and measurement can be achieved. The time cost is greatly saved. The fast calibration mode can be adopted, so that the map blind spot problem of image calibration can be compensated. The calibration efficiency and the user experience are greatly improved.
Owner:成都准望科技有限公司
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