University of Science and Technology Beijing

Zgmicro Wuxi Corporation

China Coal No.3 Construction Corporation (group) Ltd

Hefei Design & Research Institute of Coal Industry Co., Ltd

Ansteel Group Mining Corporation Limited

Bin Xu

Ning Liu

Zheng Li

Fei Ma

Yong Zhang

Guang Li

Tingting Bao

Guozheng Zhou

Donghui Man

Renshu Yang

Lin Lv

Jinghui Ye

Huidong Xu

Bo Ding

Yingcan Liu

An audio data transmission method, an audio data transmission system, and an audio data transmission device are described. The audio data transmission method comprises: receiving first channel audio data from an audio source device based on a wireless communication protocol by a first audio data receiving device, receiving second audio channel audio data from the audio source device based on the wireless communication protocol by a second audio data receiving device, starting to receive the first channel audio data and the second channel audio data by one of the first and second audio data receiving devices when a communication quality between the audio source device and another one of the first and second audio data receiving devices fails to meet a preset requirement; and forwarding the first or second channel audio data from the one of the first and second audio data receiving devices to the another one of the first and second audio data receiving device. Thus, the present invention utilizes characteristics of independent fading at different spatial positions, improves reliability of wireless communication and enhances communication quality through a spatial diversity gain.

Audio data transmission method, system and device

A full-face shaft tunnel boring machine system includes a tunnel boring machine cutterhead device for tunneling downwards in a shaft; a full-hydraulic formwork device for supporting and walling in a wellbore; and an upper muck-discharge system for vertically conveying rock mucks generated by tunneling. The tunnel boring machine cutterhead device comprises a vertical guide frame, a cutter-expanded boring head and an advanced cutterhead that are fixedly connected in a vertical order from top to bottom so as to form an integrated structure. The vertical guide frame is a hollow cylindrical structure and driven to rotate around an axis of the vertical guide frame by a power mechanism, and an outer wall of the vertical guide frame is provided with multiple sets of first guide rollers.

Full-face shaft tunnel boring machine system

Growing community of inventors

Hefei, China

Bin Xu