Abstract: The present disclosure provides a positioning method and a robot using the same. The method includes: obtaining, through the visual sensor, a current frame image; obtaining, through the ultra-wideband tag, distance of a robot from an ultra-wideband anchor; performing a feature matching on the current frame image and an adjacent frame image to generate partial map point(s); determining whether the current frame image is a key frame image; and optimizing a pose of the visual sensor corresponding to the key frame image through a joint objective function in response to the current frame image being the key frame image, where the joint objective function at least comprises a distance cost function of the ultra-wideband anchor and a visual residual cost function. Through the above-mentioned method, the accuracy of the positioning of the robot can be improved.
May 20, 2019
Date of Patent:
September 22, 2020
UBTECH ROBOTICS CORP LTD
Chenchen Jiang, Youjun Xiong, Zhichao Liu
Abstract: The present disclosure provides localization methods and a system using the same. One of the methods includes: broadcasting a ranging frame in a awake state of a localization tag; obtaining a response frame returned by the first anchor according to the ranging frame; updating the ranging anchor list according to the response frame; and calculating a distance between the localization tag and the first anchor based on a time of broadcasting the ranging frame, a time of receiving the response frame, the time of the first anchor receiving the ranging frame, and the time of the first anchor transmitting the response frame. In such a manner, the localization tag is enabled to switch the anchor for ranging in time according to the updated ranging anchor list during movement, thereby automatically ranging with the nearby anchor.
Abstract: The present disclosure provides a transmission hysteresis detecting method and apparatus. The method includes: transmitting a forward rotational instruction and a reverse rotational instruction to a motor of the servo; storing motor end positions of the motor and output shaft end positions of an output shaft corresponding to the motor in a forward rotational cycle and a reverse rotational cycle, respectively; generating first position data based on the motor end positions and the corresponding output shaft end positions in the forward rotational cycle; generating second position data based on the motor end positions and the corresponding output shaft end positions in the reverse rotational cycle; and calculating a transmission hysteresis of the servo based on the first position data and the second position data. The technical solutions of the present disclosure only needs to obtain the position data of one forward rotational cycle and one reverse rotational cycle.
July 12, 2019
Date of Patent:
July 28, 2020
UBTECH ROBOTICS CORP LTD
Youjun Xiong, Lifu Zhang, Wenhua Fan, Hanyu Sun
Abstract: The present disclosure provides a robot and an audio data processing method thereof. The robot includes a body part, a main control module, and a sound pickup module electrically coupled to the main control module. The sound pickup module includes N microphones distributed around the body part to collect audio data. The main control module is configured to obtain the audio data of a sound source from a part of the N microphones collecting the audio data of the sound source without blocked by the body part, and perform a sound source localization and a sound pickup based on the obtained audio data. The 360-degree wake-up and sound source localization of the robot and the beam-forming of directional beams are realized. In addition, the sound pickup is realized without forming microphone holes on the head of the robot, hence the aesthetics of the robot will not be affected.
Abstract: The present disclosure provides a wireless positioning method as well as a server and a storage medium with the same. The method includes: obtaining a current ranging value between a first positioning device and a second positioning device, where there is no obstruction between the first positioning device and the second positioning device; determining a distance of the first positioning device and the second positioning device in a depth direction of a tunnel based on the current ranging value; and obtaining a current coordinate of the second positioning device based on the distance. In the above-mentioned manner, the automatic updating of the coordinate of the reference base station in the tunnel can be realized, the times of repeated measurements of the base station are reduced, thereby improving the construction efficiency of the tunnel and saving working loads.