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265 results about "Time course" patented technology

Indoor inertial navigation algorithm based on posture recognition and step length model

The invention provides an indoor inertial navigation algorithm based on posture recognition and a step length model and relates to the field of indoor inertial navigation and positioning. An inertial sensor is fixed on a foot of a pedestrian and data is transmitted to a smartphone by utilizing Bluetooth; the step frequency and the step number of the pedestrian are calculated by adopting a multi-condition and zero-speed detection method and a posture angle detection method according to posture characteristics of the foot when the pedestrian walks; an inertial navigation calculation result of each step of the pedestrian is counted and classified and the step length model is established; postures and the step frequency of the foot of the pedestrian are used as reference to calibrate the inertial navigation calculation result in real time; electronic compass data of a dynamic complement algorithm based on slide mean filter is used as a real-time course angle, and whether the pedestrian has an inertial and usual movement posture or not is judged according to changes of the step frequency and the course angle of the pedestrian; the step length model is matched by taking a judging result as the basis. The problems of an indoor positioning and inertial navigation technology that error accumulation is caused by double integration so that positioning is inaccurate and the like are solved, and the accuracy of indoor long-distance navigation of the pedestrian is guaranteed.
Owner:BEIJING UNIV OF TECH

Integrated navigation and positioning system and method for submarine oil-gas pipe detection robot

PendingCN110006433AExact effective positionAccurate and effective attitude informationNavigational calculation instrumentsNavigation by speed/acceleration measurementsOcean bottomTime course
The invention belongs to the technical field of navigation and provides an integrated navigation and positioning system and method for a submarine oil and gas pipe detection robot. The integrated navigation and positioning system mainly comprises a differential GPS system, an ultra-short baseline positioning system (USBL), a strapdown inertial navigation system (SINS), a Doppler log (DVL) and thelike. The differential GPS system accurately positions geographic position coordinates of a surface vessel; the ultra-short baseline positioning system determines a three-dimensional vector position of the underwater unmanned aerial vehicle relative to the water surface unmanned ship; the strapdown inertial navigation system detects the real-time course and attitude of the underwater unmanned vehicle; and the Doppler log detects the absolute running speed of the underwater unmanned vehicle. The SINS and the DVL are combined to realize short-time high-precision positioning of the underwater unmanned vehicle, and the differential GPS and the USBL are combined to realize absolute positioning of the underwater unmanned vehicle; the long-endurance and long-voyage high-precision positioning of the underwater unmanned vehicle is realized, and the accurate position information is provided. The invention further provides a combined positioning method of various navigation instruments, and a solution is provided for underwater high-precision combined navigation.
Owner:HARBIN ENG UNIV

Fully automated control system for type 1 diabetes

An augmented, adaptive algorithm utilizing model predictive control (MPC) is developed for closed-loop glucose control in type 1 diabetes. A linear empirical input-output subject model is used with an MPC algorithm to regulate blood glucose online, where the subject model is recursively adapted, and the control signal for delivery of insulin and a counter-regulatory agent such as glucagon is based solely on online glucose concentration measurements. The MPC signal is synthesized by optimizing an augmented objective function that minimizes local insulin accumulation in the subcutaneous depot and control signal aggressiveness, while simultaneously regulating glucose concentration to a preset reference set point. The mathematical formulation governing the subcutaneous accumulation of administered insulin is derived based on nominal temporal values pertaining to the pharmacokinetics (time-course of activity) of insulin in human, in terms of its absorption rate, peak absorption time, and overall time of action. The MPC algorithm is also formulated to provide control action with an integral effect, and in essence minimizes overall drug consumption. When employed as a modulator in an automated integrated glucose-control system for type 1 diabetes, the control algorithm provides the system with self-learning capability that enables it to operate under unrestricted activity of the subject.
Owner:TRUSTEES OF BOSTON UNIV

Contact network key position dynamic offset detection method and device thereof

ActiveCN101922915AGood engineering maintainabilityAdaptableUsing optical meansPicture interpretationTime courseTime deviation
The invention relates to a contact network key position dynamic offset detection method and a device thereof. A detection identification is arranged on objects at the key position of the contact network to be detected such as contact line of the section, carrier cable, dropper and upright of the detected contact network, an online CCD detection device is arranged on the upright of the contact network, a CCD camera acquires video image of the contact network, the detected displacement and quantity of motion are stored and amplitude, angle of twist and corresponding time course curve are drawn, and the online CCD detection device transmits the data to an upper machine room data center by virtue of a wireless communication module. The method and device of the invention are non contact and self-calibration, practicability is strong, and synchronous monitoring is carried out, so as to obtain data and image; amplitude, frequency, angle of twist and corresponding time course curve are recorded in real time and are used for analyzing influence of the stability of the contact network in high wind environment or under the action of other factors, and travelling is guided according to the real-time deviation state of the contact network.
Owner:湖南科创信息技术股份有限公司 +1

Magnetic resonance spectroscopy with real-time correction of motion and frequency drift, and real-time shimming

This invention relates to localized magnetic resonance spectroscopy (MRS) and to magnetic resonance spectroscopic imaging (MRSI) of the proton NMR signal, specifically to a magnetic resonance spectroscopy (MRS) method to measure a single volume of interest and to a magnetic resonance spectroscopic imaging method with at least one spectral dimension and up to three spatial dimensions. MRS and MRSI are sensitive to movement of the object to be imaged and to frequency drifts during the scan that may arise from scanner instability, field drift, respiration, and shim coil heating due to gradient switching. Inter-scan and intra-scan movement leads to line broadening and changes in spectral pattern secondary to changes in partial volume effects in localized MRS. In MRSI movement leads to ghosting artifacts across the entire spectroscopic image. For both MRS an MRSI movement changes the magnetic field inhomogeneity, which requires dynamic reshimming. Frequency drifts in MRS and MRSI degrade water suppression, prevent coherent signal averaging over the time course of the scan and interfere with gradient encoding, thus leading to a loss in localization. It is desirable to measure object movement and frequency drift and to correct object motion and frequency drift without interfering with the MRS and MRSI data acquisition.
Owner:POSSE STEFAN
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