120 results about "Detect and avoid" patented technology

An autonomous vehicle and systems having an interface for payloads that allows integration of various payloads with relative ease. There is a vehicle control system for controlling an autonomous vehicle, receiving data, and transmitting a control signal on at least one network. A payload is adapted to detachably connect to the autonomous vehicle, the payload comprising a network interface configured to receive the control signal from the vehicle control system over the at least one network. The vehicle control system may encapsulate payload data and transmit the payload data over the at least one network, including Ethernet or CAN networks. The payload may be a laser scanner, a radio, a chemical detection system, or a Global Positioning System unit. In certain embodiments, the payload is a camera mast unit, where the camera communicates with the autonomous vehicle control system to detect and avoid obstacles. The camera mast unit may be interchangeable, and may include structures for receiving additional payload components.

A method and apparatus is provided for detecting and avoiding an obstacle using a system of a vehicle. The method includes the steps of detecting a distance between the obstacle and the vehicle, generating an action when the distance between the obstacle and the vehicle is less than a threshold, determining whether an override of the system has been initiated, and disabling the action if it is determined that the override has been initiated. The system includes an obstacle detector, an action generator, an override mechanism, and a processor configured to implement the steps of the method set forth above.

An autonomous obstacle avoidance and navigation method for unmanned aerial vehicle (UAV)-based field search and rescue provided by the invention includes global navigation based on GPS signals and anautonomous obstacle avoidance and navigation algorithm based on binocular vision and ultrasound. First, a UAV carries out search under the navigation of GPS signals according to a planned path. Aftera target is found, the autonomous obstacle avoidance and navigation algorithm based on binocular vision and ultrasound is adopted. A binocular camera acquires a disparity map containing depth information. The disparity map is re-projected to a 3D space to get a point cloud. A cost map is established according to the point cloud. The path is re-planned using the cost map to avoid obstacles. When there is no GPS signal, a visual inertial odometry (VIO) is used to ensure that the UAV flies according to the planned path, and an ultrasonic sensor is used to detect and avoid obstacles below the UAVto approach the rescued target. UAV autonomous obstacle avoidance and navigation in a field search and rescue scene is realized.

The invention provides a mobile robot obstacle detecting and avoiding method and a system. The method comprises steps: information of an obstacle in a detection region is acquired, the state of the obstacle in the detection region is judged according to the acquired obstacle information, states comprise a static state and a mobile state, and an avoiding strategy of the mobile robot is determined according to the state of the obstacle. The invention also provides a mobile robot obstacle detecting and avoiding system, which comprises a ranging sensor, a state judger and a mobile robot driving structure. When the method and the system of the invention are used, different obstacle avoiding strategies can be adjusted according to obstacle appearing time, an obstacle avoiding behavior of walking along the original path is increased compared with the existing obstacle detouring mode, if the obstacle leaves in a set time or the obstacle leaves after appearing instantaneously, the mobile robot can walk continuously according to the planned path, and demands of a path planner can be better met.

A wireless mesh communication network includes a plurality of wireless routers which can be managed in a hierarchical manner with respect to one another and all of the routers are capable of detecting and avoiding interference on channels over which they communicate with one another. Depending upon whether a channel is active or inactive, a wireless router can either passively detect interference and then switch channels to avoid it or actively detect interference and then switch channels to avoid it.

A system, method, and computer-readable medium for detection and avoidance of victim services in ultra-wideband systems is provided. A detect and avoid module may calculate power averages of OFDM tones. The power of tones may then be measured and compared with power averages of corresponding tones. If a measured tone power exceeds an average power of a corresponding tone by a dynamic threshold, the tone may be identified as associated with an interferer. The threshold may be inversely related to the gain level of an automatic gain control module. The ultra-wideband subsystem may be configured with known bands of victim services of other RF systems, and a tone identified as associated with an interferer that is within a known victim service band may be identified as a victim service. The UWB subsystem may attenuate or otherwise suppress transmission within the victim service band to avoid interfering with the victim service.

Aspects of the disclosure relate generally to detecting and avoiding blind spots of other vehicles when maneuvering an autonomous vehicle. Blind spots may include both areas adjacent to another vehicle in which the driver of that vehicle would be unable to identify another object as well as areas that a second driver in a second vehicle may be uncomfortable driving. In one example, a computer of the autonomous vehicle may identify objects that may be relevant for blind spot detecting and may determine the blind spots for these other vehicles. The computer may predict the future locations of the autonomous vehicle and the identified vehicles to determine whether the autonomous vehicle would drive in any of the determined blind spots. If so, the autonomous driving system may adjust its speed to avoid or limit the autonomous vehicle's time in any of the blind spots.

The present disclosure relates generally to an automotive panel warning and protection system that enables vehicle operators to detect and avoid collisions between objects and low-height portions or panels of the underside of a vehicle. A vehicle is equipped with a range detector, video camera, or combination of both that is positioned on the vehicle such that it is able to determine a vertical clearance of a portion of the underside of the vehicle and an object external to the vehicle. If the vertical clearance is determined to fall below a vertical clearance threshold, the driver may be alerted. An interface system resident in the vehicle cabin may provide the vehicle operator with real-time visual information depicting spatial relationships between the external object and the vehicle and / or the portion of the underside of the vehicle that is determined not to have sufficient vertical clearance.

Embodiments of the present invention provide methods and systems for ensuring that mobile robots are able to detect and avoid positive obstacles in a physical environment that are typically hard to detect because the obstacles do not exist in the same plane or planes as the mobile robot's horizontally-oriented obstacle detecting lasers. Embodiments of the present invention also help to ensure that mobile robots are able to detect and avoid driving into negative obstacles, such as gaps or holes in the floor, or a flight of stairs. Thus, the invention provides positive and negative obstacle avoidance systems for mobile robots.

A recovery walking aiding robot belongs to walking aiding robots and recovery machinery, solves the problem that an existing recovery walking aiding robot is inflexible to pass through the narrow environment, simple in motion function and high in requirements for operation flexibility of users, and well meets actual recovery requirements. The recovery walking aiding robot comprises a handrail frame, a connection frame, a flat type microcomputer, an S-shaped support rod and a base plate, wherein the handrail frame is fixed with the connection frame through a linear bearing, the flat type microcomputer is installed on the connection frame through a support seat, the connection frame is arranged on the base plate through the S-shaped support rod, a control box is arranged on the base plate, and an environmental self-adaption module, a motion intention identification module, a speed control module, a falling prevention module and a motor driving module are loaded on the flat type microcomputer. The recovery walking aiding robot can automatically adapt to complex external environments, can achieve the functions of detecting and avoiding obstacles, preventing sliding and the like, provides falling prevention, and solves contradiction between dyskinesia of users and operation requirements of the robot.

A way of implementing the Detect-and-Avoid (DAA) function into WiMedia / UWB devices based on the existing WiMedia protocol. The DAA operation is conducted in the MAC, and the MAC informs the software for the decision making process.The DAA operation in this invention composed of two individual operations; the Interferer-Detection operation and the Avoid-Interference operation.The Avoid-Interference operation follows the Interferer-Detection operation if the host MAC reports excessive error after the Interferer-Detection operation.This invention suggests various ways of avoiding interferences with the existing services or with other UWB network

The invention relates to a method for automatically detecting and avoiding obstacles for an unmanned aerial vehicle under complicated environments. The method comprises the following steps of utilizing a double-lens camera arranged on the unmanned aerial vehicle to collect images in real time, and according to the matching of collected left and right images, calculating to generate a disparity map, and pretreating; according to the information of the disparity map, clustering and classifying the contour and gray-scale value of the disparity map, so as to obtain a zone block with a clear structure; eliminating a noise interference of the zone block, so as to obtain a potential obstacle area; comparing the potential obstacle areas in two disparity maps of the front and back frames, and according to the amplifying characteristics of the obstacles, the distance between the unmanned aerial vehicle and the potential obstacle area, and the area of the potential obstacle area, screening to obtain a final obstacle area; according to the obtained final obstacle area, outputting an action instruction for the unmanned aerial vehicle to avoid the obstacles. The method has the advantage that under the complicated environment with multiple hidden obstacles, the excellent obstacle detection and avoidance ability is realized.

Non human entities such as automated web crawlers or malicious click-fraud programs can skew the tracking of clicks on web site advertisements. Thus, it is desirable to filter out page views caused by such automated entities. To achieve this goal, a web site may interject an intermediate web page after a web viewer selects an advertising link but before the web viewer is sent to the advertiser's designated web site. The intermediate web page allows for a response from the web viewer. The system then analyzes the web viewer's response to the intermediate web page (if any) along with other information using an adjustable testing policy to make a determination as to whether the web viewer is a human or non-human entity. An adjustable interject policy may be used to determine if an interjection should occur after a web viewer has selected an advertisement and before the web viewer is directed to the advertiser's designated web site. In this manner, the number of web viewers that are subjected to the intermediate web page is reduced.

Systems and methods are disclosed herein for identifying and avoiding attempts to access a defective portion of memory. Various techniques are provided for detecting a defect in a portion of memory and dynamically avoiding future attempts to access the defective portion of memory. More specifically, the techniques detect and avoid both hard and erratic errors.

An ultra wide band (UWB) device and a detect and avoid (DAA) method thereof are provided. The UWB device includes a detect and avoid (DAA) module block which detects a strength of radio signals received in a plurality of channels and determines communicability of the channels; a multitone generation block which generates a plurality of frequencies corresponding to the plurality of the channels and outputs one of the plurality of frequencies; and a controller which controls the multitone generation block to generate frequencies of an available channel which is determined to be communicable by the DAA module block. The method includes detecting a strength of radio signals received in a plurality of channels; determining communicability of the channels according to the detected strength of the radio signals; generating frequencies corresponding to a channel which is determined to be communicable; and transmitting or receiving a signal using the generated frequencies.

An autonomous moving apparatus moving to a destination while detecting and avoiding an obstacle includes a radar device for scanning a horizontal plane in its travelling direction to thereby detect a position of an obstacle and an obstacle sensor for detecting an obstacle in a space different from the scanning plane of the radar device. The apparatus moves to the destination under such control as to avoid the obstacle based on detection information from the radar device and the obstacle sensor from a detection output provided by a specific-configuration detecting element for detecting a present specific configuration from scanning information by the radar device. By providing such a specific-configuration detecting element that detects a specific configuration based on the scan information by the radar device that can accurately know about position information, it is possible to guess an obstacle having an upper structure, thus providing efficient avoidance.

Camera systems are presented that can utilize geographical information to detect and avoid flicker conditions caused by fluorescent lighting automatically. The camera systems are configured to work in conjunction with signals from wireless communication networks or the GPS system.

A receiving host in a TCP / IP network sends an acknowledgment indicating a received data packet is corrupt. The sending host will begin transmitting with a new field set in the IP header called a check-TCP-checksum bit, thereby requesting that all routers in the TCP / IP network perform a checksum on the entire received packet. Routers in the TCP / IP network will perform a complete checksum on an entire packet with the check-TCP-checksum bit set, and not just on the IP header. The routers continuously monitor the ratio of corrupt packets received on a particular port that fail the entire packet checksum to the total number of packets received on that port. If the ratio of corrupt-to-received packets exceeds a corruption threshold, the router assumes that the associated link is causing data corruption and issues a routing update indicating that the link is bad and should be avoided. Once the retransmission rate between the sender and receiver drops below a threshold level, the bad link has been detected and avoided within the TCP / IP network and the check-TCP-checksum option in the IP header is no longer set in data packets transmitted to the receiver host.

A system for dynamically shifting beacons in a distributed wireless network and a method thereof are disclosed. In a medium access control for a wireless personal area network based on a mobile ad-hoc network, beacons are shifted to other free lower slots in order to reduce the size of a beacon period. Also, collisions that may occur during the shifting of the beacons are detected and avoided. According to the system and method, the size of the beacon period for transmitting data can sufficiently be secured by dynamically reducing the size of the beacon period without collisions.

Methods, systems, and articles of manufacture consistent with the present invention provide a optimization tool for avoiding an address dependency between tasks in a program. The tool determines whether two or more tasks of the program are dependent on at least one same address, which is associated with a first memory block. When it is determined that the two or more tasks of the program are dependant on the at least one same address, the tool allocates a second memory block and changes a read reference by at least one of the two or more tasks from the first memory block associated with the at least one same address to the second memory block.

The present invention provides multi-channel protection switching systems and methods for increased reliability and reduced cost. Advantageously, the multi-channel protection switching systems and methods of the present invention use pre-FEC rate measurements, and changes in pre-FEC rate measurements, to detect and avoid potential link failures before they occur. The multi-channel protection switching systems and methods of the present invention also use “wavelength-hopping” and other protection schemes to alleviate wavelength and time-dependent optical propagation impairments. Advantageously, the multi-channel protection switching systems and methods of the present invention switch proactively on diminished, rather than failed, signals; do not require the pre-provisioning of bandwidth through an alternate physical path; allow for switching in either the electrical or optical domain; and incorporate buffering of the data sources involved such that they may be synchronized, thereby providing “hitless” switching between channel sources on the client side.

A non-scanning radar system is installed on an aircraft to detect and avoid bird strikes or collisions with other airborne hazards. Target amplitude, range, and Doppler tracking versus time are used to qualify the collision threat. Avoidance is based on a quick minor altitude change by the pilot or autopilot to exit the imminent bird or other airborne hazard altitude window. In one embodiment, a bistatic passive radar receiver antenna is used in conjunction with an existing geostationary satellite signal. Range and Doppler information are obtained via cross correlation processing of the hazard reflection signal with a direct path reference signal from the satellite.

The invention discloses a detection kit for quickly identifying donkey skin, horse skin and mule skin, which is used for accurately identifying donkeys, horses, mules and jennets by creatively applying 16SrRNA genes of CKM (creatine kinase) karyogene (nDNA) and mitochondrial genome DNA (mtDNA) at the same time from genetic background of the horses, the donkeys and the mules. The kit adopts an molecular beacon probe (MB) method to carry out a quintuple multicolor fluorescence quantitative PCR (polymerase chain reaction) detection technology, and also can detect donkey, horse, mule and jennet components; and moreover, the kit is added with exogenous internal reference as an interior label, can detect and avoid false negative results produced by PCR inhibitor contained in a sample. The quintuple multicolor fluorescence quantitative PCR is used for detecting in the same tube without opening a cover, so that the detection kit is not easy to pollute, and is accurate and stable, simple to operate, extremely high in sensitivity, strong in specificity, and the like, and therefore, a novel way is explored for identifying the donkey skin, horse skin and mule skin.

The invention discloses an indoor blind person navigation robot. The indoor blind person navigation robot comprises a navigation robot and a wearable mobile terminal. The navigation robot comprises a camera module, a walking module, a central control unit, a man-machine interaction module, a reminding module and a wireless communication module. The wearable mobile terminal comprises a voice module, an acceleration sensor and a wireless communication module. The navigation robot and the wearable mobile terminal are in communication through the wireless communication modules, the camera module acquires a three-dimensional environmental map, the three-dimensional environmental map and an indoor three-dimensional scene map are matched to acquire a current position, it is achieved that the robot detects and avoids obstacles and monitors the position of a blind user, the motion state of the walking module is adjusted to not deviate from a navigation path, a destination can be obtained through the voice module or the man-machine interaction module for path planning, and the blind user is reminded to change advancing directions and avoid the obstacles in real time. The indoor blind person navigation robot has the advantages of being convenient to use, high in positioning precision, high in obstacle avoiding capacity, wide in application prospect and the like.

Aspects of the disclosure relate generally to detecting and avoiding blind spots of other vehicles when maneuvering an autonomous vehicle. Blind spots may include both areas adjacent to another vehicle in which the driver of that vehicle would be unable to identify another object as well as areas that a second driver in a second vehicle may be uncomfortable driving. In one example, a computer of the autonomous vehicle may identify objects that may be relevant for blind spot detecting and may determine the blind spots for these other vehicles. The computer may predict the future locations of the autonomous vehicle and the identified vehicles to determine whether the autonomous vehicle would drive in any of the determined blind spots. If so, the autonomous driving system may adjust its speed to avoid or limit the autonomous vehicle's time in any of the blind spots.

The embodiments of the invention provide a multi-Agent conflict-free cooperative task allocation method comprising the steps of: performing task modeling on a multi-agent network; for positions of scenes, performing resource modeling by using grids; planning routes between agents and each task and obtaining the optimal routes between position points; calculating time consumption between the agentsand each task according to the moving routes; decomposing each task performed collaboratively by the agents in the scenes into multiple simple tasks; in the process of encoding, repairing unreasonable encoding and determining the reasonability of all kinds of encoding; analyzing task allocation problems by using an intelligent evolutionary algorithm to obtain the optimal solution of the current step; analyzing route resource conflicts in the optimal solution, performing detection and avoiding resource conflicts; completing conflict-free cooperative task allocation of a multi-agent system through the whole algorithm process. According to the embodiments of the invention, the efficiency of task allocation and performing in complex task allocation scenes is improved and shared resource conflicts is avoided.

The invention discloses a method and a system for avoiding an internet protocol (IP) address conflict, a dynamic host configuration protocol (DHCP) server and a DHCP client. The method comprises the following steps that: a DHCP server distributes an IP address to a DHCP client according to a request of the DHCP client and receives an IP address conflict message that carries a conflicting IP address and is sent by the DHCP client on the condition that the DHCP client has detected that the distributed IP address is the same as that of the other equipment; and the DHCP server carries out processing on the conflicting IP address according to the IP address conflict message and redistributes an IP address to the DHCP client according to the request of the DHCP client. According to a technical scheme of the invention, when there is an IP address conflict in a network, it can be ensured that a DHCP client can rapidly detect and avoid the IP address conflict, so that normal and stabilization of the network can be rapidly recovered.