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Akademický článek

Design of a 470 MHz band IoT antenna for a handheld terminal

Autor: Sun Nan, Wen Zhiguo, Jiang Fan, Li Yan, Wang Yujing, Zou Jian, Song Ya

Publikováno v: Dianzi Jishu Yingyong, Vol 47, Iss 1, Pp 11-15 (2021)

Many handheld terminal devices require a light and compact receiving and transmitting antenna. FPC antennas are popular among designers because of their light weight and thin thickness. In order to obtain an antenna with suitable size, bandwidth and

Externí odkaz: https://doaj.org/article/c767c942d3ae4b4a9848fe3f2beaa3f3

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Akademický článek

Research on principle of supporting status classification and sensing of hydraulic support

Autor: ZHANG Desheng, WEI Xuntao, BIAN Ji, WEN Zhiguo, LI Dingyi, DU Shangyu

Publikováno v: Gong-kuang zidonghua, Vol 46, Iss 8, Pp 32-37 (2020)

Aiming at problem that single attitude measurement of hydraulic support can not fully reflect comprehensive state of hydraulic support, and can not realize accurate perception of supporting state of hydraulic support, taking two column shield hydraul

Externí odkaz: https://doaj.org/article/0485e50b9cc84543b1d3664baa2ace9c

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Akademický článek

Hydraulic support condition monitoring system based on LoRaWA

Autor: HAN Zhe, DU Yibo, REN Huaiwei, ZHAO Guorui, WEN Zhiguo, ZHOU Jie

Publikováno v: Gong-kuang zidonghua, Vol 46, Iss 8, Pp 89-93 (2020)

In view of unstable communication and poor anti-interference ability of the existing hydraulic support condition monitoring system, a hydraulic support condition monitoring system based on LoRaWAN was designed. Sensor nodes use rate adaptive technolo

Externí odkaz: https://doaj.org/article/4e7879aa73394f5dbc28ffe8fa24fadf

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