Nolo Co., Ltd

Daoning Zhang

Jianing Zhang

Yiming Zhang

Ruiyuan Ran

Provided is a calibration-free positioning method and system. The positioning method includes: setting a positioning period, acquiring a first coordinate of a positioned object in a base station coordinate system at the end of one positioning period, performing an inertial navigation within the one positioning period to obtain a first inertial navigation result; controlling, within a next positioning period, the positioned object to move to obtain a second coordinate in the base station coordinate system at the end of the next positioning period, performing an inertial navigation on the positioned object within the positioning period to obtain a second inertial navigation result, and calculating displacement vectors in the base station coordinate system and in the inertial navigation coordinate system; calculating a rotation quaternion; transforming, through the rotation quaternion, a coordinate obtained by the inertial navigation to the base station coordinate system, output a position of the positioned object after transforming.

Calibration-free positioning method and system

Provided are a data processing method for multi-sensor fusion, a positioning apparatus and a VR device. The method includes: calculating a pose of a physical center by using data of at least one sensor set in a first positioning period; obtaining the predicted pose of the physical center according to an inertial navigation of the pose of the physical center; calculating a three-dimensional coordinate pose of each sensor set in a second positioning period; calculating, based on the three-dimensional coordinate pose, third inertial navigation data of each sensor set in the second positioning period; obtaining the converted poses of the physical center respectively through the third inertial navigation data and a pose relationship between each sensor and the physical center; and obtaining the predicted pose of each sensor set based on the converted poses of the physical center.

Data processing method for multi-sensor fusion, positioning apparatus and virtual reality device

Disclosed are a control method and a control device for an ultrasonic receiving device. The control method includes: determining a target receiver of the ultrasonic receiving device, where the ultrasonic receiving device includes at least two ultrasonic receivers, and the target receiver is one of the at least two ultrasonic receivers on the ultrasonic receiving device that is the nearest to an ultrasonic transmitting device; and controlling a state of each of the at least two ultrasonic receivers on the ultrasonic receiving device based on the determined target receiver. Thus, the ultrasonic ranging error is reduced, and the accuracy of measurement is improved.

Control method and device for ultrasonic receiving device

Provided are a video streaming system, and a corresponding video streaming method and video streaming apparatus. The video streaming system includes a terminal and a VR device. Application platform software and server streaming software are installed on the terminal. Client streaming software is installed on the VR device, the client streaming software is configured to send posture data to the server streaming software on the terminal, the server streaming software is configured to send the posture data to the application platform software, and the application platform software is configured to render a picture. The hardware configuration of the terminal itself is utilized for picture processing, and satisfactory pictures can be obtained on the screen of the VR device. On the other hand, the picture is rendered according to prediction positioning data/prediction posture data, thereby effectively reducing picture jitter and display delay.

Video streaming system, video streaming method and apparatus

A three-dimensional space detection system, including: a locating base station, a label device to be located, and a computing device. The locating base station synchronizes a base time point to the label device to be located, sends an ultrasonic signal to the label device to be located, rotationally sends a first laser plane signal about a first rotation axis, and rotationally sends a second laser plane signal about a second rotation axis perpendicular to the first rotation axis. The label device to be located synchronizes a base time point from the locating base station, detects the ultrasonic signal, the first laser plane signal and the second laser plane signal. The computing device determines the three-dimensional space coordinates of the label device to be located according to the time point at which the label device to be located detects the ultrasonic signal, the time point at which the label device to be located detects the first laser plane signal and the time point at which the label device to be located detects the second laser plane signal. The locating system enables precise indoor locating based on ultrasound and laser signals.

Three-dimensional space detection system, positioning method and system

Provided is a positioning base station includes: a rotating laser plane emitting unit, a distance measuring device and a synchronization device. The rotating laser plane emitting unit is configured to rotate around a rotation axle, and emit two laser plane signals having a preset angle therebetween. The two laser plane signals are configured to scan a space. The distance measuring device is configured to emit a distance measuring signal configured to measure a distance between the positioning base station and a device to be positioned. The synchronization device is configured to transmit a synchronization signal configured to synchronize time of the positioning base station and the device to be positioned.

Growing community of inventors

Beijing, China

Daoning Zhang