This application discloses a calibration method for navigation of an unmanned aerial vehicle (UAV), a non-transitory computer-readable storage medium and a UAV implementing the same. The calibration method includes: collecting, during a flight of the UAV, reference data during two measurements of a reference vector performed by a vector sensor; acquiring a zero-point offset M.sub.0 of the vector sensor according to the reference data; acquiring original data R.sub.k of any vector measured by the vector sensor; acquiring valid data V.sub.k according to the zero-point offset M.sub.0 and the original data R.sub.k; and control headings and postures of the UAV according to the valid data V.sub.k. With the calibration method in this application, the valid data V.sub.k is defined as a vector data acquired after a zero-point error of the original data R.sub.k is eliminated, which is more closely approximated to an actual value of a to-be-measured vector.

This application discloses a calibration method for navigation of an UAV including a vector sensor. The calibration method includes: collecting, during a flight of the UAV, a current correction value and current data during a current measurement performed by the vector sensor; acquiring previous data during a previous measurement performed by the vector sensor; acquiring an adjustment quantity according to the current data and the previous data; acquiring a next correction value according to the current correction value and the adjustment quantity; and acquiring next original data during a next measurement performed by the vector sensor, acquiring next valid data according to the next original data and the next correction value , and controlling headings and postures of the UAV according to the next valid data. With the calibration method of this application, the next valid data V.sub.k+1 more closely approximated to a true value can be obtained.

An improved UAV system and methods for operation in an inventory management system. The methods include generating a three dimensional (3D) map and estimating a position and orientation of the UAV based upon this map; autonomously navigating the UAV in the environment by using the generated 3d map in conjunction with the position and the orientation of the UAV; performing static and dynamic obstacle avoidance in the environment using collision avoidance; and finding the optimal path from a source node to a destination node within the environment.

Liquid-gauging systems for estimating amounts of liquid within collapsible bladders. In some embodiments, a liquid-gauging system of this disclosure includes one or more liquid-gauging sensors that each output a signal relating to an amount of liquid within a corresponding collapsible bladder. In some embodiments, each liquid-gauging sensor comprises a variable capacitor having capacitor plates located so that the spacing between the capacitor plates changes with changing amounts of liquid within the collapsible bladder. In some embodiments, each liquid-gauging sensor comprises a pressure sensor for measuring forces, such as gravitational forces, that change with changing amounts of liquid within the collapsible bladder. In some embodiments, a liquid-gauging system is configured for an aircraft or other moving vehicle and includes one or more additional sensors to adjust the estimating process to account for changes in attitude of the vehicle during use. Corresponding methods, liquid-storage systems, and collapsible bladders are also disclosed.

Locating, aiding, and communicating with users and personnel in emergency situations by traversing a defined path utilizing an unmanned vehicle, detecting a user within a threshold distance of the defined path, logging a geolocation of the user within the unmanned vehicle, and determining whether to dispatch assistance to the user.

A system including a spine portion that is configured to run from top end and a bottom end of a kite. A cross-spar segment having a first end portion and a second end portion that runs from wingtip to wingtip of said kite. A cover part, in which the cover part comprise a fabric made of at least one of a nylon and a cloth. A tail section. A first flight operative system disposed on one end portion of the cross-spar segment. A second flight operative system disposed on another end portion of the cross-spar segment.

An on-demand mobile lawyer method includes receiving a live consultation request from a user, automatically receiving a live-stream of video images of the user and surroundings and storing the video images, automatically searching a plurality of records associated with a plurality of lawyers stored in a remote database, automatically identifying at least one lawyer licensed in a jurisdiction that corresponds to a current location of the user, automatically transmitting at least one notification to the identified at least one lawyer, live-streaming captured video images of the user for viewing by the identified at least one lawyer, automatically receiving and storing live-streaming video images of the identified at least one lawyer in the remote database, and automatically transmitting the live-streaming video images of the identified at least one lawyer to be displayed on a display screen viewable by the user.

A marine drone system utilizing an unmanned aerial vehicle to provide visual feedback for conditions including temperature, depth, and conditions which may suggest favorable fishing conditions, such as weed lines, flotsam, breaks, and objects, such as birds or fish. The system utilizes a plurality of sensors, including, but not limited to, cameras, laser, GPS, radar, and LIDAR. The visual feedback may be shown as a video fees or a map, wherein the feedback is shown as a visual backgrounds, wherein an overlay of interactive functions provides information regarding the conditions. The system also includes method steps for implementing, obtaining, and displaying the information. The system hardware includes the unmanned aerial vehicle, a base station, and a hardwired tether between the unmanned aerial vehicle and the base station providing power and bi-directional data transfer.

A population density map of a region is generated by dividing the region into cells and allocating a population of the region only to the cells that are accessible to people, or are believed to be populated. Each of the cells is classified based on one or more ground features of the cells, and an adjustment factor for each of the cells is determined based at least in part on the classifications. Equal shares of the population of the region are allocated to each of the cells that is accessible or populated, and the equal shares are multiplied by the adjustment factors determined for the respective ones of the cells to calculate a population for each of such cells.

A digital compass with two or more multi-axis magnetometers and a processing element to determine a heading and detect any offset error in the heading is described. One electronic device includes first and second magnetometers. The second magnetometer can be disposed at least a specified distance or co-located and offset at least a specified angle from the first magnetometer. A processing device determines a magnetic field at the electronic device using a first output from the first magnetometer, detects an offset error in the magnetic field using a second output from the second magnetometer, and reports the offset error in the magnetic field.